Journal articles on the topic '3D printing model'
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Waskar, Vidula. "3D Building Model Printing." International Journal for Research in Applied Science and Engineering Technology 6, no. 5 (May 31, 2018): 2733–41. http://dx.doi.org/10.22214/ijraset.2018.5447.
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Pham, Ngoc-Giao, Suk-Hwan Lee, Oh-Heum Kwon, and Ki-Ryong Kwon. "3D Printing Model Random Encryption Based on Geometric Transformation." International Journal of Machine Learning and Computing 8, no. 2 (April 2018): 186–90. http://dx.doi.org/10.18178/ijmlc.2018.8.2.685.
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Popovski, Filip, Svetlana Mijakovska, Hristina Dimova Popovska, and Gorica Popovska Nalevska. "Creating 3D Models with 3D Printing Process." International Journal of Computer Science and Information Technology 13, no. 6 (December 31, 2021): 59–68. http://dx.doi.org/10.5121/ijcsit.2021.13605.
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This scientific paper will cover the process of creating two 3D objects, accompanied by a brief history of 3D printing technology, designing the model in CAD software, saving in appropriate format supported by the 3D printer, features of technology and the printer, materials from which the object can be made and examples where the products created by the 3D printing process can be applied. The printing of models was made by the studio "Xtrude Design & 3D Print" in Skopje. Two 3D models have been printed. A creative model of intertwined 4 triangles in STL file format has been made, which will be transferred and printed with PLA material. The model with the heart on the stand is printed with popular FDM process also with PLA material which is biodegradable and environmentally friendly. Both models are printed on Anet A8 3D printer. Different printing times, layer thicknesses and cost price of producion we have in our research.
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Ai, Ju Mei, and Ping Du. "Discussion on 3D Print Model and Technology." Applied Mechanics and Materials 543-547 (March 2014): 130–33. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.130.
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3D printing is a new technology of computer science, is an important topic in the field of academic discussion, is still in the primary stage of 3D printing technology in China, the application is not widespread, so scholars have discussed a lot of work to do. This paper introduces the 3D printing technology international and domestic development situation, the working principle, the printing process and technology, proposed the application bottleneck 3D printing technology is to manufacture, printing materials therefore, electroactive materials developed for 3D printing will become an important direction of future research of 3D print.
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Stathas, Dionysios, J. P. Wang, and Hoe I. Ling. "Model geogrids and 3D printing." Geotextiles and Geomembranes 45, no. 6 (December 2017): 688–96. http://dx.doi.org/10.1016/j.geotexmem.2017.07.006.
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Brooks, Gail, Kim Kinsley, and Tim Owens. "3D Printing As A Consumer Technology Business Model." International Journal of Management & Information Systems (IJMIS) 18, no. 4 (September 11, 2014): 271. http://dx.doi.org/10.19030/ijmis.v18i4.8819.
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Although the technology for 3D printing has been around for more than three decades, its full potential is just beginning to be realized in the business world. Ideas for 3D printing run the gamut from the hobbyist printing jewelry and toys to the medical industry researching 3D printing of human organs. One way businesses are utilizing 3D printing is through support services within their own business processes, referred to in this paper as a consumer technology business model. As with any emerging use of a technology, legal and ethical issues will arise. This paper shows how 3D printing has evolved, why businesses are realizing the strategic potential for 3D printing to create a competitive advantage using a consumer technology business model and why this could raise legal and ethical issues associated with existing laws related to the use of 3D technology.
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Lazarev, Yuriy, Oleg Krotov, Svetlana Belyaeva, and Marina Petrochenko. "3D environmentally friendly concrete printing model preparation." E3S Web of Conferences 175 (2020): 11024. http://dx.doi.org/10.1051/e3sconf/202017511024.
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This article considers ways of the construction printing of models for agriculture, road, civil and also industrial construction using concrete mixtures. For acquaintance with technology, the architectural element with width of layer of 4 cm and 8 cm all model high has been taken with height of one layer of 2 cm. This model has been prepared with use of two packages of the program complexes having different functionality, namely AutoCAD+SheetCAM+Mach3, the second Sketch-Up+Simplify3D. Each software package was used for design of model in 2D or 3D perspectives, division of model into layers, identical on height, by means of technology of slicer, and also for creation of task of the model printing by concrete for the construction printer of model S 6044. Ready mixes for geopolymer concrete have been taken. By results of the printing, comparison of quality of the models printed on the construction printer and technology of each package of program complexes have been made. The printing of models has shown that quality of the printing is identical. In this case, the second method using a bundle of 2 programs (SketchUp + Simplify3D), which allows printing volumetric models of any shape both in plan and in the future, has an advantage.
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Nugraha, Hari Din, and Deny Poniman Kosasih. "Perancangan Mesin 3D Printing Model Cartesian." Jurnal Teknik Mesin ITI 5, no. 1 (March 12, 2021): 29. http://dx.doi.org/10.31543/jtm.v5i1.557.
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3D Printing merupakan salah satu terobosan bidang manufaktur khususnya teknik additive manufacturing, yang proses menjadikan dalam file digital menjadi suatu objek padat 3 dimensi berdasarkan susunan lapisan (layer) bahan. Tujuan penelitian ini adalah merancang mesin 3D Printing dengan model siste cartesian dan pengujian sistem menggunakan aplikasi repitier host. Penlitian menggunakan jenis penelitian Design-Based-Research (DBR). Hasil penelitian di jabarkan sebagai berikut; (1) proses perancangan desain mesin 3D printing didapatkan hasil area kerja panjang 30 cm lebar 30 cm dan tinggi 30 cm, sehingga dari rencana area kerja tersebut bisa ditentukan komponen mekanis, komponen rangka utama dan komponen pelengkap lainya. (2) Software repitier host dapat digunakan sebagai simulasi model cartesian. Repitier dapat digunakan cocok digunakan menggunakan bahan dari Polilactid Acid (PLA) dan hasil warna yang lebih sempurna dan beragam. (3) Pada hasil pengujian terdapat stringing pada hasil simulasi produk, hal ini disebabkan karena pengaturan retraksi dan suhu temperatur yang tinggi
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Tsolakis, Ioannis A., William Papaioannou, Erofili Papadopoulou, Maria Dalampira, and Apostolos I. Tsolakis. "Comparison in Terms of Accuracy between DLP and LCD Printing Technology for Dental Model Printing." Dentistry Journal 10, no. 10 (September 28, 2022): 181. http://dx.doi.org/10.3390/dj10100181.
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Background: The aim of this study is to evaluate the accuracy of a Liquid Crystal Display (LCD) 3D printer compared to a Direct Light Processing (DLP) 3D printer for dental model printing. Methods: Two different printers in terms of 3D printing technology were used in this study. One was a DLP 3D printer and one an LCD 3D printer. The accuracy of the printers was evaluated in terms of trueness and precision. Ten STL reference files were used for this study. For trueness, each STL file was printed once with each 3D printer. For precision, one randomly chosen STL file was printed 10 times with each 3D printer. Afterward, the models were scanned with a model scanner, and reverse engineering software was used for the STL comparisons. Results: In terms of trueness, the comparison between the LCD 3D printer and DLP 3D printer was statistically significant, with a p-value = 0.004. For precision, the comparison between the LCD 3D printer and the DLP 3D printer was statistically significant, with a p-value = 0.011. Conclusions: The DLP 3D printer is more accurate in terms of dental model printing than the LCD 3D printer. However, both DLP and LCD printers can accurately be used to print dental models for the fabrication of orthodontic appliances.
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Shi, Ce, Lin Zhang, Jingeng Mai, and Zhen Zhao. "3D printing process selection model based on triangular intuitionistic fuzzy numbers in cloud manufacturing." International Journal of Modeling, Simulation, and Scientific Computing 08, no. 02 (December 22, 2016): 1750028. http://dx.doi.org/10.1142/s1793962317500283.
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The distributed and customized 3D printing can be realized by 3D printing services in a cloud manufacturing environment. As a growing number of 3D printers are becoming accessible on various 3D printing service platforms, there raises the concern over the validation of virtual product designs and their manufacturing procedures for novices as well as users with 3D printing experience before physical products are produced through the cloud platform. This paper presents a 3D model to help users validate their designs and requirements not only in the traditional digital 3D model properties like shape and size, but also in physical material properties and manufacturing properties when producing physical products like surface roughness, print accuracy and part cost. These properties are closely related to the process of 3D printing and materials. In order to establish the 3D model, the paper analyzes the model of the 3D printing process selection in the cloud platform. Triangular intuitionistic fuzzy numbers are applied to generate a set of 3D printers with the same process and material. Based on the 3D printing process selection model, users can establish the 3D model and validate their designs and requirements on physical material properties and manufacturing properties before printing physical products.
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Yang, Minhua, Xin-guang Lv, Xiao-jie Liu, and Jia-qing Zhang. "Research on color 3D printing based on color adherence." Rapid Prototyping Journal 24, no. 1 (January 2, 2018): 37–45. http://dx.doi.org/10.1108/rpj-07-2016-0112.
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Purpose This paper aims to present a method of color three-dimensional (3D) printing based on color adherence. Design/methodology/approach First, experiments of the color effects of 3D printings using different carriers and different printing methods were performed. Second, the color of a specific point could be calculated through a theory of dimension-reducing, and the color distribution of 3D model was transformed from 3D to 1D color line corresponding with 3D print sequence. At last, the color lines, which were printed on a PE film by silk-screen printing, was carried by a filament and then printed through a fused deposition modeling 3D printer. Findings The printing ink and PE film are suitable as the pigment and carrier under this investigation, respectively. Based on an idea of reducing dimension, the method of 3D color printing through adhering color to a filament is realized. The color saturation of the sample was relatively high through the method. Research limitations/implications It is hard to avoid that there may be some residual color in the nozzle through this method, and the purity of following color will be affected. As a result, continuous improvements should be made to perfect the method. Practical implications An approach of 3D color printing is described in detail, and what kind of model is more applicable is discussed particularly. Originality/value This approach is implemented to print color 3D objects with just one nozzle by means of color adherence. That is, printing the 3D objects using the filament is carried out with 1D color line, which is printed by a traditional printing method.
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Wang, Yacheng, Peibo Li, Yuegang Liu, Yize Sun, and Liuyuan Su. "Variable snap-off study for 3D additive screen printing." International Journal of Clothing Science and Technology 32, no. 3 (January 6, 2020): 430–45. http://dx.doi.org/10.1108/ijcst-11-2018-0146.
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Purpose In 3D additive screen printing with constant snap-off, the inhomogeneous screen counterforce will influence the printing force and reduce the printing quality. The purpose of this paper is to study the relationship between scraper position, snap-off and screen counterforce and develop a variable snap-off curve for 3D additive screen printing to improve the printing quality. Design/methodology/approach An experiment was carried out; genetic algorithm (GA) optimization theoretical model, backpropagation neural network regression model and least square support vector machine regression model were established to study the relationship between scraper position, snap-off and screen counterforce. The absolute errors of counterforce of three models with the experiment results were less than 1.5 N, which was tolerated and the three models were considered valid. The comparison results showed that GA optimization theoretical model performed best. Findings The results suggest that GA optimization theoretical model performed best to represent the relationship, and it was used to develop a variable snap-off curve. With the variable snap-off curve in 3D additive screen printing, the inhomogeneous screen counterforce was weakened and the printing quality was improved. Originality/value In printing production, the variable snap-off curve in 3D additive screen printing helps improve the printing quality; this study is of prime importance to the 3D additive screen printing.
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Ammalainen, Victoria. "Legal Aspects of 3D Printing." Legal Concept, no. 3 (October 2021): 138–42. http://dx.doi.org/10.15688/lc.jvolsu.2021.3.20.
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Introduction: the article discusses the legal aspect of 3D printing and computer 3D models, which are printed using a 3D printer. The prospects, threats and challenges that the development of 3D printing technologies entails are examined. The author comes to the conclusion that it is necessary to adapt the new technological realities to the current legislation and it is necessary to take into account which particular object will be displayed in the three-dimensional model, since this will determine which rights to objects will be affected. Methods: the methodological basis of this scientific article is a number of methods of scientific knowledge, among which the main place is occupied by methods of information processing and logical analysis, synthesis, induction, deduction and generalization. Results: the author’s position on 3D models and their legal regulation is presented. Conclusions: as a result of the study, recommendations were made for improving the regulatory framework, the author proposes to delimit the legal protection of 3D models by amending Art. 1259, 1352 of the Civil Code of the Russian Federation.
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Huang, Chenxi, Yisha Lan, Sirui Chen, Qing Liu, Xin Luo, Gaowei Xu, Wen Zhou, et al. "Patient-Specific Coronary Artery 3D Printing Based on Intravascular Optical Coherence Tomography and Coronary Angiography." Complexity 2019 (December 23, 2019): 1–10. http://dx.doi.org/10.1155/2019/5712594.
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Despite the new ideas were inspired in medical treatment by the rapid advancement of three-dimensional (3D) printing technology, there is still rare research work reported on 3D printing of coronary arteries being documented in the literature. In this work, the application value of 3D printing technology in the treatment of cardiovascular diseases has been explored via comparison study between the 3D printed vascular solid model and the computer aided design (CAD) model. In this paper, a new framework is proposed to achieve a 3D printing vascular model with high simulation. The patient-specific 3D reconstruction of the coronary arteries is performed by the detailed morphological information abstracted from the contour of the vessel lumen. In the process of reconstruction which has 5 steps, the morphological details of the contour view of the vessel lumen are merged along with the curvature and length information provided by the coronary angiography. After comparing with the diameter of the narrow section and the diameter of the normal section in CAD models and 3D printing model, it can be concluded that there is a high correlation between the diameter of vascular stenosis measured in 3D printing models and computer aided design models. The 3D printing model has high-modeling ability and high precision, which can represent the original coronary artery appearance accurately. It can be adapted for prevascularization planning to support doctors in determining the surgical procedures.
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Yap, Yee Ling, Yong Sheng Edgar Tan, Heang Kuan Joel Tan, Zhen Kai Peh, Xue Yi Low, Wai Yee Yeong, Colin Siang Hui Tan, and Augustinus Laude. "3D printed bio-models for medical applications." Rapid Prototyping Journal 23, no. 2 (March 20, 2017): 227–35. http://dx.doi.org/10.1108/rpj-08-2015-0102.
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Purpose The design process of a bio-model involves multiple factors including data acquisition technique, material requirement, resolution of the printing technique, cost-effectiveness of the printing process and end-use requirements. This paper aims to compare and highlight the effects of these design factors on the printing outcome of bio-models. Design/methodology/approach Different data sources including engineering drawing, computed tomography (CT), and optical coherence tomography (OCT) were converted to a printable data format. Three different bio-models, namely, an ophthalmic model, a retina model and a distal tibia model, were printed using two different techniques, namely, PolyJet and fused deposition modelling. The process flow and 3D printed models were analysed. Findings The data acquisition and 3D printing process affect the overall printing resolution. The design process flows using different data sources were established and the bio-models were printed successfully. Research limitations/implications Data acquisition techniques contained inherent noise data and resulted in inaccuracies during data conversion. Originality/value This work showed that the data acquisition and conversion technique had a significant effect on the quality of the bio-model blueprint and subsequently the printing outcome. In addition, important design factors of bio-models were highlighted such as material requirement and the cost-effectiveness of the printing technique. This paper provides a systematic discussion for future development of an engineering design process in three-dimensional (3D) printed bio-models.
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Yuan, Jiangping, Zhaohui Yu, Guangxue Chen, Ming Zhu, and Yanfei Gao. "Large-size color models visualization under 3D paper-based printing." Rapid Prototyping Journal 23, no. 5 (August 22, 2017): 911–18. http://dx.doi.org/10.1108/rpj-08-2015-0099.
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Purpose The purpose of this paper is to study a feasible visualization of large-size three-dimension (3D) color models which are beyond the maximum print size of newest paper-based 3D printer used 3D cutting-bonding frame (3D-CBF) and evaluate the effects of cutting angle and layout method on printing time of designed models. Design/methodology/approach Sixteen models, including cuboid model, cylinder model, hole model and sphere model with different shape features, were divided into two symmetric parts and printed by the Mcor IRIS HD 3D printer. Before printing, two sub-parts were rearranged in one of three layout methods. Nine scaled sizes of original models were printed to find the quantitative relationship between printing time and scale values in each type. For the 0.3 times of original models, six cutting angles were evaluated in detail. Findings The correlation function about colorization time and printed pages was proposed. Based on 3D-CBF, the correlation between printing time and scale size is statistically defined. Optimization parameters of designed parts visualization about cutting angel and layout method were found, even if their statistical results were difficult to model their effects on printing time of specimens. Research limitations/implications The research is comparative and limited to the special models and used procedures. Originality/value The paper provides a feasible visualization and printing speed optimization methods for the further industrialization of 3D paper-based printing technology in cultural creative field.
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Wicaksono, Romario A., Eddy Kurniawan, M. Khalid Syafrianto, Ramadhani Fadelandro Suratman, and M. Ridho Sofyandi. "Rancang Bangun dan Simulasi 3D Printer Model Cartesian Berbasis Fused Deposition Modelling." Jurnal Engine: Energi, Manufaktur, dan Material 5, no. 2 (October 23, 2021): 53. http://dx.doi.org/10.30588/jeemm.v5i2.895.
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<p><em>The process of designing and manufacturing a Cartesian 3D printer model based on Fused Deposition Modelling (FDM) is carried out to produce a 3D printer machine that can perform the printing process accurately and quickly. In this research, the process is divided into three stages, namely designing using Computer-Aided Design (CAD) software, printing and assembling components of a 3D printer machine, and analysing the mechanical structure of a 3D printer machine. This 3D printer is designed to carry out the printing process with an area of 180x180x150 mm. Some components of 3D printing machines use Polylactic Acid (PLA). The simulation results based on the Finite Element Method show that the 3D printer engine is feasible to produce printing with a mass of 40% of the maximum possible load.</em></p>
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Chen, Yi Ping, and Ming Der Yang. "Micro-Scale Manufacture of 3D Printing." Applied Mechanics and Materials 670-671 (October 2014): 936–41. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.936.
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3D printing as additive manufacturing enables to give concept proposers and designers a great possibility of producing physical parts and concept models at acceptable cost during a short time. Such technology is quite distinct from traditional machining techniques adopting subtractive process. The purpose of this study is to briefly describe new micro-scale manufacture utilizing a series of process of 3D printing, including 3D modeling, 3D model slicing, printing, and products. Especially, 3D modeling is one of major components in 3D printing process and becomes a barrier to entry the business of micro-scale manufacture for everyone with a 3-D printer. This paper introduces two low-cost approaches to generate 3D models, including active and passive approaches. 3D scanning as an active approach allows the replication of real objects without the need of moulding techniques. On the other hand, image-based modeling as a passive is an alternative of un-touch model reconstruction without a threat of destructive impact to the modeled object. Also, a statue in gypsum was made by a 3D printer based on a digital 3D model generated through the low-cost active approach for demonstration.
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Dvoryankin, A. O., I. S. Nefyolov, and N. I. Baurova. "Influence investigation of technological conditions of 3D-printing on antiadhesion properties of master-model surfaces." All the Materials. Encyclopedic Reference Book, no. 9 (September 2021): 8–12. http://dx.doi.org/10.31044/1994-6260-2021-0-9-8-12.
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It is shown that one of the promising methods to prepare a master-model for the casting production of engineering industry products is FDM 3D-printing. The influence of technological conditions of 3D-printing on antiadhesion properties of surfaces has been studied. By experiments it was found out that for 3D-printing of master-models it was necessary to have conditions in which the parameter of filling percent was more than 60%. Recommendations for the use of 3D-printing methods for production of casting molds are given.
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Chen, Yi Ping, and Ming Der Yang. "Micro-Manufacturing Using Online 3D Printing." Applied Mechanics and Materials 872 (October 2017): 94–98. http://dx.doi.org/10.4028/www.scientific.net/amm.872.94.
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As an additive manufacturing process, 3D printing provides conceptualizers and designers an opportunity to quickly produce physical components and concept models at reasonable costs. Such manufacturing is distinct from mass production involving traditional subtractive machining processes. This paper briefly describes microscale manufacturing involving a series of 3D-printing-related processes, including 3D modeling, 3D model slicing, printing, and production. Furthermore, specifications of 3D printers, a major component of the 3D printing process, impedes the entry of new micro-manufacturing businesses, such as the maximum printing volume, printing material, positioning accuracy, layer thickness, and price, were analyzed. In addition, online 3D printing service could be an alternative to overcome the difficulty of new entry to micro-manufacturing by a step-by-step instruction through internet. Commercially available online 3D printing services were surveyed and compared in material and cost in this paper.
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Torres, Inez, and Nelson De Luccia. "Artificial vascular models for endovascular training (3D printing)." Innovative Surgical Sciences 3, no. 3 (August 11, 2018): 225–34. http://dx.doi.org/10.1515/iss-2018-0020.
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AbstractThe endovascular technique has led to a revolution in the care of patients with vascular disease; however, acquiring and maintaining proficiency over a broad spectrum of procedures is challenging. Three-dimensional (3D) printing technology allows the production of models that can be used for endovascular training. This article aims to explain the process and technologies available to produce vascular models for endovascular training, using 3D printing technology. The data are based on the group experience and a review of the literature. Different 3D printing methods are compared, describing their advantages, disadvantages and potential roles in surgical training. The process of 3D printing a vascular model based on an imaging examination consists of the following steps: image acquisition, image post-processing, 3D printing and printed model post-processing. The entire process can take a week. Prospective studies have shown that 3D printing can improve surgical planning, especially in complex endovascular procedures, and allows the production of efficient simulators for endovascular training, improving residents’ surgical performance and self-confidence.
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Talyosef, Orly. "Perspectives on BIM-Based 3D Printing for Sustainable Buildings." Architext 9 (2021): 36–52. http://dx.doi.org/10.26351/architext/9/3.
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Three-dimensional (3D) printing, also called additive manufacture (AM), is a novel, automated method of printing a structure layer-by-layer directly from a 3D digital design model. Its potential ability to build complex shapes in a less costly and more sustainable manner may revolutionize the construction industry. There are three main 3D printing techniques: (a) contour crafting; (b) concrete printing, and (c) D-shape. As a disruptive technology, 3D printing creates a new market and value network, thus disturbing the established market. Building information modeling (BIM) is a comprehensive management approach encompassing the entire life cycle of the architecture and construction (A&C) process, including architectural planning, geometrical data, scheduling, material, equipment, resource and manufacturing data, and post-construction facility management. By maintaining safety and productivity in large-scale digital processes, BIM is critical to 3D printing’s success in construction. Integrating BIM and 3D printing techniques into A&C can potentially lead to an ecological architectural process that reduces waste and energy inefficiency, and prevents injuries and fatalities on construction sites, while increasing productivity and quality. This paper examines BIM-based 3D printing of sustainable buildings, which may revolutionize the construction industry and contribute to a sustainable environment
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Yang, Yuanting, Hao Wang, Hongning Song, Yugang Hu, Qincheng Gong, Ye Xiong, Junbi Liu, Wei Ren, and Qing Zhou. "Morphological Evaluation of Mitral Valve Based on Three-dimensional Printing Models: Potential Implication for Mitral Valve Repair." BIO Integration 2, no. 4 (December 30, 2021): 143–51. http://dx.doi.org/10.15212/bioi-2021-0017.
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Abstract Objective: This study aimed to analyze the morphological characteristics of rheumatic (RMVD) and degenerative mitral valve diseases (DMVD) based on three-dimensional (3D) printing model before and after surgery and to explore the potential implication of the 3D printing model for mitral valve (MV) repair.Methods: 3D transesophageal echocardiography (TEE) data of the MV were acquired in 45 subjects (15 with RMVD, 15 with DMVD, and 15 with normal MV anatomy). 3D printing models of the MV were constructed by creating molds to be printed with water-soluble polyvinyl alcohol, then filled with room temperature vulcanizing silicone. The parameters of the annulus and leaflet of the MV were acquired and analyzed using the 3D printing model. Mitral valve repair was simulated on 3D printing models of 10 subjects and compared with the actual operation performed on patients. The effects of surgery were assessed by evaluating the changes in coaptation length (CL) and the annular height to commissural width ratio (AHCWR) before and after MV repairs. The correlations of the grade of mitral regurgitation with CL and AHCWR were analyzed.Results: 3D silicone MV models were all successfully constructed based on 3D TEE data. Compared with the normal groups, the mitral annulus size in the RMVD groups showed no significant differences. In contrast, mitral annulus in DMVD groups was dilated and flattened with diameters of anteroposterior, anterolateral-posteromedial, commissural width, annular circumferences, and area increased. Mitral repair was successfully simulated on 10 models with significant increase in leaflet coaptation area both in vivo and in vitro. Good agreement was observed in CL and AHCWR after surgery in the 3D printing model compared with real surgery on the patient valve. The grade of mitral regurgitation correlated inversely with CL (r = ‐0.87, P < 0.01) and AHCWR (r = ‐0.79, P < 0.01). Mitral valve repair was performed twice in one model to assess which provided a better outcome.Conclusions: 3D printing models of the MV based on 3D TEE data could be used in morphological analysis of the MV before and after surgery in RMVD and DMVD. Surgery simulation on 3D printing models could provide valuable information concerning morphological changes after surgery, with are closely associated with clinical outcomes.
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Cykowska-Błasiak, Małgorzata, and Paweł Ozga. "3D printing, as a tool for planning orthopedic surgery." Budownictwo i Architektura 14, no. 1 (March 10, 2015): 015–23. http://dx.doi.org/10.35784/bud-arch.1662.
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The purpose of the literature review is to determine the scope of 3D printing, also known as RP (Rapid Prototyping) applications in manufacturing medical model based on CJP (Collor Jet Printing) technology, with emphasis on the use in orthopedic surgery planning. The research of the presented method will be focused on the financial aspect. Researchers accept as axiomatic fact that the main buyer of the MRP (Medical Rapid Prototyping) structure will be the patient while the recipient will be the doctor or surgeon that provides the operation.
Using available open-source software solutions and suitable method for the treatment of CT (Computed Tomography) scans based on filtering RAW files managed we to get the best or relatively good results allowing to exclude a human work from one of the most difficult and time-consuming processes. Total cost of 3D printings including all production processes and post-productions are about 50% lower than commercial rates (on free market) for the model of: “oscoxae” including "osfemoris" (femur length not exceeding 20 cm). In our opinion it’s "relatively positive" effect.
Despite the success in the field of lowering the cost of 3D prints our work is still focused on reducing it (at least up to another 30%) by using automated-machine processing and tasks automation, as well as using another printing methods. Using 3D printings as a tools to help plan complex orthopedic surgeries make possible to extremely reduce the time of using instrumentation and the treatment time (comparing to similar surgeries carried out without using 3D printings).
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GENG Guo-hua, 耿国华, 石晨晨 SHI Chen-chen, 魏潇然 WEI Xiao-ran, and 张雨禾 ZHANG Yu-he. "Model segmentation and packaging in 3D printing." Optics and Precision Engineering 24, no. 6 (2016): 1439–47. http://dx.doi.org/10.3788/ope.20162406.1439.
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Shepherd, S., M. Macluskey, A. Napier, and R. Jackson. "Oral surgery simulated teaching; 3D model printing." Oral Surgery 10, no. 2 (June 21, 2016): 80–85. http://dx.doi.org/10.1111/ors.12228.
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Hodder, Kevin J., John A. Nychka, and Rick J. Chalaturnyk. "Process limitations of 3D printing model rock." Progress in Additive Manufacturing 3, no. 3 (April 19, 2018): 173–82. http://dx.doi.org/10.1007/s40964-018-0042-6.
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Dvoryankin, O. A., and N. I. Baurova. "Application of 3D-printing technologies for production of master-model in engineering industry." Technology of Metals, no. 9 (September 2021): 17–21. http://dx.doi.org/10.31044/1684-2499-2021-0-9-17-21.
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Analysis of 3D-printing methods used in the molding production to manufacture master-models has been carried out. The technology was selected, which allowed one to make high-precision parts, combining the molding and the 3D-printing. Factors effecting on the quality of 3D-models printed by this technology were analyzed. Experimental studied for determination of the printing parameter influence (layer thickness, filling percentage, printing velocity) on ultimate strength of specimens made of ABS-plastic were carried out.
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Bodani, Jayesh, Urval Panchal, and Prof Marnish Modi. "Research Paper Fabrication of 3D Printer." International Journal for Research in Applied Science and Engineering Technology 10, no. 4 (April 30, 2022): 1156–59. http://dx.doi.org/10.22214/ijraset.2022.41481.
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Abstract: 3D printing is called as desktop fabrication. It is a process of prototyping where by a structure is synthesized from a 3d model. The 3d model is stored in as a STL format and then forwarded to a 3D printer. It can use a good range of materials like ABS, PLA, and composites also .3D printing may be a rapidly developing and price optimized sort of rapid prototyping. The 3D printer prints the CAD design layer by layer forming a true object. 3D printing springs from inkjet desktop printers during which multiple deposit jets and therefore the printing material, layer by layer derived from the CAD 3D data. 3D printing significantly challenges production processes within the future. This type of printing is predicted to influence industries, like automotive, medical, education, equipment, consumer products industries and various businesses. Keywords: 3d printing, Rapid Prototyping, ABS, PLA
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Ren, Xiang, Qingwei Zhang, Kewei Liu, Ho-lung Li, and Jack G. Zhou. "Modeling of pneumatic valve dispenser for printing viscous biomaterials in additive manufacturing." Rapid Prototyping Journal 20, no. 6 (October 20, 2014): 434–43. http://dx.doi.org/10.1108/rpj-03-2013-0025.
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Purpose – The purpose of this paper is establishing a general mathematical model and theoretical design rules for 3D printing of biomaterials. Additive manufacturing of biomaterials provides many opportunities for fabrication of complex tissue structures, which are difficult to fabricate by traditional manufacturing methods. Related problems and research tasks are raised by the study on biomaterials’ 3D printing. Most researchers are interested in the materials studies; however, the corresponded additive manufacturing machine is facing some technical problems in printing user-prepared biomaterials. New biomaterials have uncertainty in physical properties, such as viscosity and surface tension coefficient. Therefore, the 3D printing process requires lots of trials to achieve proper printing parameters, such as printing layer thickness, maximum printing line distance and printing nozzle’s feeding speed; otherwise, the desired computer-aided design (CAD) file will not be printed successfully in 3D printing. Design/methodology/approach – Most additive manufacturing machine for user-prepared bio-material use pneumatic valve dispensers or extruder as printing nozzle, because the air pressure activated valve can print many different materials, which have a wide range of viscosity. We studied the structure inside the pneumatic valve dispenser in our 3D heterogeneous printing machine, and established mathematical models for 3D printing CAD structure and fluid behaviors inside the dispenser during printing process. Findings – Based on theoretical modeling, we found that the bio-material’s viscosity, surface tension coefficient and pneumatic valve dispenser’s dispensing step time will affect the final structure directly. We verified our mathematical model by printing of two kinds of self-prepared biomaterials, and the results supported our modeling and theoretical calculation. Research limitations/implications – For a certain kinds of biomaterials, the mathematical model and design rules will have unique solutions to the functions and equations. Therefore, each biomaterial’s physical data should be collected and input to the model for specified solutions. However, for each user-made 3D printing machine, the core programming code can be modified to adjust the parameters, which follows our mathematical model and the related CAD design rules. Originality – This study will provide a universal mathematical method to set up design rules for new user-prepared biomaterials in 3D printing of a CAD structure.
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Pitayachaval, Paphakorn, Nattawut Sanklong, and Anantapoom Thongrak. "A Review of 3D Food Printing Technology." MATEC Web of Conferences 213 (2018): 01012. http://dx.doi.org/10.1051/matecconf/201821301012.
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The additive manufacturing technology has been applied to directly construct physical model from 3D model without mold and die. Several industries utilize this technology to manufacture a complicated part such as automobile, aerospace including food industry. The advantage 3D food printing are ability to produce complex food model and ability to design unique pattern. A 3D food printing technique is composed of an extrusion-based printing, binder jetting and inkjet printing. The food materials such as sugar, chocolate, and cheese are used to create designed shape based on layer-by-layer. This paper presents a review of 3D food printing techniques. This review is to categorize, printability, productivity, properties of material and mechanism of 3D food printing techniques, as well as to provide the direction of future development.
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Bianhong, Li, Qi Wei, and Wu Qiong. "Research progress of carbon materials in the field of three-dimensional printing polymer nanocomposites." Nanotechnology Reviews 11, no. 1 (January 1, 2022): 1193–208. http://dx.doi.org/10.1515/ntrev-2022-0051.
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Abstract Three-dimensional (3D) printing technology is an additive manufacturing technology designed to rapidly process and manufacture complex geometrical components based on computer model design. Based on a 3D data model, materials are accumulated layer by layer through computer control, and the 3D model is finally turned into a stereoscopic object. Compared with traditional manufacturing methods, 3D printing technology has the advantages of saving man-hours, easy operation, no need for molds, and strong controllability of component geometry. With the development of this technology, according to the core materials and equipment and other elements of the printing molding technology, several types of 3D printing technologies such as fused deposition modeling, selective laser sintering, stereolithography, and solvent cast-3D printing have gradually formed. This review focuses on the principles and characteristics of several of the most representative 3D printing molding processes. And based on carbon nanomaterial (carbon fibers, graphene, and carbon nanotubes) reinforced polymer composite materials, the research progress of different 3D printing molding processes in recent years is reviewed. At the same time, the commercial application of 3D printing molding process in this field is analyzed and prospected.
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Bianhong, Li, Qi Wei, and Wu Qiong. "Research progress of carbon materials in the field of three-dimensional printing polymer nanocomposites." Nanotechnology Reviews 11, no. 1 (January 1, 2022): 1193–208. http://dx.doi.org/10.1515/ntrev-2022-0051.
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Abstract Three-dimensional (3D) printing technology is an additive manufacturing technology designed to rapidly process and manufacture complex geometrical components based on computer model design. Based on a 3D data model, materials are accumulated layer by layer through computer control, and the 3D model is finally turned into a stereoscopic object. Compared with traditional manufacturing methods, 3D printing technology has the advantages of saving man-hours, easy operation, no need for molds, and strong controllability of component geometry. With the development of this technology, according to the core materials and equipment and other elements of the printing molding technology, several types of 3D printing technologies such as fused deposition modeling, selective laser sintering, stereolithography, and solvent cast-3D printing have gradually formed. This review focuses on the principles and characteristics of several of the most representative 3D printing molding processes. And based on carbon nanomaterial (carbon fibers, graphene, and carbon nanotubes) reinforced polymer composite materials, the research progress of different 3D printing molding processes in recent years is reviewed. At the same time, the commercial application of 3D printing molding process in this field is analyzed and prospected.
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Bianhong, Li, Qi Wei, and Wu Qiong. "Research progress of carbon materials in the field of three-dimensional printing polymer nanocomposites." Nanotechnology Reviews 11, no. 1 (January 1, 2022): 1193–208. http://dx.doi.org/10.1515/ntrev-2022-0051.
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Abstract Three-dimensional (3D) printing technology is an additive manufacturing technology designed to rapidly process and manufacture complex geometrical components based on computer model design. Based on a 3D data model, materials are accumulated layer by layer through computer control, and the 3D model is finally turned into a stereoscopic object. Compared with traditional manufacturing methods, 3D printing technology has the advantages of saving man-hours, easy operation, no need for molds, and strong controllability of component geometry. With the development of this technology, according to the core materials and equipment and other elements of the printing molding technology, several types of 3D printing technologies such as fused deposition modeling, selective laser sintering, stereolithography, and solvent cast-3D printing have gradually formed. This review focuses on the principles and characteristics of several of the most representative 3D printing molding processes. And based on carbon nanomaterial (carbon fibers, graphene, and carbon nanotubes) reinforced polymer composite materials, the research progress of different 3D printing molding processes in recent years is reviewed. At the same time, the commercial application of 3D printing molding process in this field is analyzed and prospected.
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Cha, Minsu, Chang-Won Kim, Taehee Lee, Baek-Joong Kim, Hunhee Cho, Taehoon Kim, and Hyunsu Lim. "An Optimal Layout Model of Curved Panels for Using 3D Printing." Sustainability 14, no. 21 (October 26, 2022): 13896. http://dx.doi.org/10.3390/su142113896.
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Recently, the application of 3D printing in the production of curved panels has increased due to the irregular shape of free-form buildings. In general, 3D printing based on additive manufacturing (AM) methods requires various supports that cause a waste of printing materials and an increase in production time. In this study, we proposed a method for printing a pair of panels that can hold each other through the minimal support connected between each panel. However, this printing method causes an additional non-productivity factor called the non-printing path for the nozzle to move between the pair of panels. Therefore, we also developed an optimal layout model that can minimize non-printing paths and used the genetic algorithm (GA) for its calculation. As a result of applying the optimization model proposed in this study through the case study, the non-printing path was reduced by 18.54% compared with that from the existing method, and the non-printing time was reduced by 34.41 h. The total production time, including non-printing time and printing time, was reduced by 3.89%, and the productivity was improved by 4.04%. The model proposed in this study is expected to minimize unproductive factors that occur in the process of manufacturing curved panels and reduce the energy consumption.
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McGahern, Patricia, Frances Bosch, and DorothyBelle Poli. "Enhancing Learning Using 3D Printing." American Biology Teacher 77, no. 5 (May 1, 2015): 376–77. http://dx.doi.org/10.1525/abt.2015.77.5.9.
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Student engagement during the development of a three-dimensional visual aid or teaching model can vary for a number of reasons. Some students report that they are not “creative” or “good at art,” often as an excuse to justify less professional outcomes. Student engagement can be low when using traditional methods to produce a model, but 3D printing gives both the teacher and the student new ways of experiencing classroom activities. The simple (and free) software offers students valuable skills, “professional” modeling results, a stronger understanding of the topic at hand, and new confidence.
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Stanciu, Nicoleta-Violeta, Razvan-Tudor Rosculet, Catalin Fetecau, and Costel Tapu. "Forensic Facial Reconstruction Using 3D Printing." Materiale Plastice 57, no. 4 (January 6, 2021): 248–57. http://dx.doi.org/10.37358/mp.20.4.5424.
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The paper presents the application of 3D printing in the forensic field in order to perform facial reconstruction on a 3D printed replica of the victim�s skull. Firstly, imagine data from a computed tomography of a skull was converted into a 3D model. Then, the 3D skull model was sliced and printed in different positions in order to optimize the 3D printing configuration. Since the quality of the 3D printing process depends on the thermal and rheological properties of the 3D printing filaments, the rheological behavior of the ABS was investigated using melt flow rate and capillary rheometry. Lastly, an accurate skull replica was achieved using the optimal printing parameters. The 3D printed skull was used to perform the facial reconstruction of the victim by the forensic team. Based on the results of the present research, the 3D printing technology is a feasible solution to obtain anatomically accurate skull replicas.
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Gwangwava, Norman, Albert U. Ude, Enock Ogunmuyiwa, and Richard Addo-Tenkorang. "Cloud Based 3D Printing Business Modeling in the Digital Economy." International Journal of E-Entrepreneurship and Innovation 8, no. 2 (July 2018): 25–43. http://dx.doi.org/10.4018/ijeei.2018070103.
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3D printing, also known as additive manufacturing, is becoming the industry standard for manufacturing and prototyping. Although the technology is very old, it gained a huge traction in the past two decades. 3D printing favors unique once-off orders (mass customization) in contrast to mass production. This calls for innovative business models in order to realize economic gains from the technology. Increased product innovations in the global economy also contribute to wide adoption of 3D printing unlike in the old days. A transition in the manufacturing field has brought e-manufacturing and now cloud-based manufacturing. Machines, including 3D printers, in the past were not Internet-enabled but modern designs have the capability of Internet connectivity. Cloud-based 3D printing is a new model of design that has a significant impact on today's entrepreneurs. This article focuses on a business case for a cloud-based approach in consumer product niches. A cloud-based 3D printing business model (3D-Cloud) is developed based on the business model canvas, which promises major breakthroughs in e-entrepreneurship innovation. The model uses a virtual community approach to bring together technocrats, enthusiasts, and shared 3D printer facilities of common interests, whilst promoting an enterprising spirit.
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Yu, Hui, Enze Chen, Yao Chen, and Zhenyu Qi. "The Model of Ceramic Surface Image Based on 3D Printing Technology." Mobile Information Systems 2022 (July 30, 2022): 1–12. http://dx.doi.org/10.1155/2022/5850967.
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With the rapid development of the new manufacturing industry, 3D printing technology continues to make new technological breakthroughs, and new works emerge in the manufacturing, medical, construction, military, and other application fields. However, for ceramic materials, there are still many problems to be solved in 3D printing. In this study, a dual-scale lightweight interactive model based on lofted surface and periodic parameter curve embedding is proposed for ceramic 3D printing. Users can model and manufacture lofted surfaces with small-scale geometric textures. For the two closed curves entered by the user, the intermediate section sampling points are generated by interpolation between them, and the shape of the current surface is adjusted under ceramic 3D printing manufacturing constraints such as no support and path non-interference. complete large-scale surface modeling based on lofted surfaces. Then the straight line path between the sampling points is replaced by a periodic curve path, and the small-scale geometric texture modeling is completed by adjusting the period and amplitude of the curve function. Finally, each section sampling point is spirally connected layer by layer and directly generats a single continuous printing path and manufacture. The experimental results show that the tool provides users with sufficient modeling space and high efficiency of model generation and effectively generates G-code files with textured lofted surfaces that can directly print ceramic 3D. It can also avoid the collision between printer nozzles and printing models and can be directly used in 3D printing and manufacturing based on clay materials.
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Wang, Chen, and Lin. "A Collaborative and Ubiquitous System for Fabricating Dental Parts Using 3D Printing Technologies." Healthcare 7, no. 3 (September 6, 2019): 103. http://dx.doi.org/10.3390/healthcare7030103.
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Three-dimensional (3D) printing has great potential for establishing a ubiquitous service in the medical industry. However, the planning, optimization, and control of a ubiquitous 3D printing network have not been sufficiently discussed. Therefore, this study established a collaborative and ubiquitous system for making dental parts using 3D printing. The collaborative and ubiquitous system split an order for the 3D printing facilities to fulfill the order collaboratively and forms a delivery plan to pick up the 3D objects. To optimize the performance of the two tasks, a mixed-integer linear programming (MILP) model and a mixed-integer quadratic programming (MIQP) model are proposed, respectively. In addition, slack information is derived and provided to each 3D printing facility so that it can determine the feasibility of resuming the same 3D printing process locally from the beginning without violating the optimality of the original printing and delivery plan. Further, more slack is gained by considering the chain effect between two successive 3D printing facilities. The effectiveness of the collaborative and ubiquitous system was validated using a regional experiment in Taichung City, Taiwan. Compared with two existing methods, the collaborative and ubiquitous 3D printing network reduced the manufacturing lead time by 45% on average. Furthermore, with the slack information, a 3D printing facility could make an independent decision about the feasibility of resuming the same 3D printing process locally from the beginning.
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Wang, Yajing, Yaodong Yang, Shuaipeng Suo, Mingyuan Wang, and Weifeng Rao. "Using Blockchain to Protect 3D Printing from Unauthorized Model Tampering." Applied Sciences 12, no. 15 (August 8, 2022): 7947. http://dx.doi.org/10.3390/app12157947.
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As three-dimensional (3D) printing technology is widely used, security issues have arisen, especially in the terminal parts of automobiles, aircraft, and 3D-printed military equipment. If the original design models or the STL (stereolithography) files are hacked or tampered, severe consequences can be anticipated. In this paper, we propose a demonstration to use a high-throughput blockchain to store the “fingerprints” of the 3D model and verify the “fingerprints” before printing to prevent illegal tampering. Relying on the tamper-resistant features of blockchain, the security of the model and the credibility of the terminal components can be ensured. The combination of blockchain and 3D printing will help people to build a trusted manufacturing environment and realize a more flexible manufacturing for future industry.
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Lazna, Richard, Radek Barvir, Alena Vondrakova, and Jan Brus. "Creating a Haptic 3D Model of Wenceslas Hill in Olomouc." Applied Sciences 12, no. 21 (October 25, 2022): 10817. http://dx.doi.org/10.3390/app122110817.
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Interactivity in today’s society finds its way into many facets of life and can be used in various ways, including 3D printing. For example, various 3D models can be incorporated into museum exhibitions and serve as interactive media for visitors, deepening their experience. One of the advantages of haptic 3D models is the immediate haptic feedback. Such models can have various uses, from being a part of an interactive exhibition to providing assistance to people with visual impairment. This article describes the process of creating a haptic 3D model depicting Wenceslas Hill in Olomouc in the eighteenth century. The model has several surface elements printed from conductive material that react to touch. The interactive model itself is unchanged from its original modelled 3D version, meaning the shape of the object stays the exact same throughout modifications. The resulting model conveys additional information about the object or its parts by means of a web interface via a connected tablet device. To implement the desired functionality, TouchIt3D technology was used. This technology uses a combination of conductive and non-conductive materials for 3D printing. The conductive material serves to propagate an electrical signal caused by touching a chosen part of the model. A 3D printer with two extruders was used for printing the model, allowing simultaneous printing of two different materials. The model’s scalability is advantageous for potential use by people with visual impairment. The model shall serve as a tool for enriching historical knowledge about the object by using interactivity.
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Ishutov, Sergey, Franciszek J. Hasiuk, Chris Harding, and Joseph N. Gray. "3D printing sandstone porosity models." Interpretation 3, no. 3 (August 1, 2015): SX49—SX61. http://dx.doi.org/10.1190/int-2014-0266.1.
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The petroleum industry requires new technologies to improve the economics of exploration and production. Digital rock physics is a methodology that seeks to revolutionize reservoir characterization, an essential step in reservoir assessment, using computational methods. A combination of X-ray computed microtomography, digital pore network modeling, and 3D printing technology represents a novel workflow for transferring digital rock models into tangible samples that can be manufactured in a variety of materials and tested with standard laboratory equipment. Accurate replication of pore networks depends on the resolution of tomographic images, rock sample size, statistical algorithms for digital modeling, and the resolution of 3D printing. We performed this integrated approach on a sample of Idaho Gray Sandstone with an estimated porosity of 29% and permeability of 2200 mD. Tomographic images were collected at resolutions of 30 and [Formula: see text] per voxel. This allowed the creation of digital porosity models segmented into grains and pores. Surfaces separating pores from grains were extracted from the digital rock volume and 3D printed in plastic as upscaled tangible models. Two model types, normal (with pores as voids) and inverse (with pores as solid), allowed visualization of the geometry of the grain matrix and topology of pores, while allowing characterization of pore connectivity. The current resolution of commodity 3D printers with a plastic filament ([Formula: see text] for pore space and [Formula: see text] for grain matrix) is too low to precisely reproduce the Idaho Gray Sandstone at its original scale. However, the workflow described here also applies to advanced high-resolution 3D printers, which have been becoming more affordable with time. In summary, with its scale flexibility and fast manufacturing time, 3D printing has the potential to become a powerful tool for reservoir characterization.
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Golab, Adam, Marcin Slojewski, Miroslaw Brykczynski, Magdalena Lukowiak, Marek Boehlke, Daniel Matias, and Tomasz Smektala. "Three-Dimensional Printing as an Interdisciplinary Communication Tool: Preparing for Removal of a Giant Renal Tumor and Atrium Neoplastic Mass." Heart Surgery Forum 19, no. 4 (August 22, 2016): 185. http://dx.doi.org/10.1532/hsf.1500.
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Three-dimensional (3D) printing involves preparing 3D objects from a digital model. These models can be used to plan and practice surgery. We used 3D printing to plan for a rare complicated surgery involving the removal of a renal tumor and neoplastic mass, which reached the heart atrium. A printed kidney model was an essential element of communication for physicians with different specializations.
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Pekarcikova, Miriam, Peter Trebuna, Marek Kliment, and Stefan Kral. "Case Study: 3D Modelling and Printing of a Plastic Respirator in Laboratory Conditions." Applied Sciences 12, no. 1 (December 23, 2021): 96. http://dx.doi.org/10.3390/app12010096.
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The importance of 3D printing is primarily that it enables customized production and, through Industry 4.0 technology, enables decentralized production. The article deals with the issue of 3D modelling and 3D printing of plastic respirators in the laboratory conditions of the authors’ workplace. In the above case study, the process of creating 3D models of individual parts of a plastic respirator and the production of a given model using a 3D printer is processed. The article also outlines the trends in 3D printing in connection with Blockchain and their importance on the Supply Chain.
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Nefelov, I. S., and N. I. Baurova. "Modeling of optimal parameters of 3D-printing." All the Materials. Encyclopedic Reference Book, no. 6 (June 2022): 26–31. http://dx.doi.org/10.31044/1994-6260-2022-0-6-26-31.
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Algorithms of the program for determining the optimal parameters of 3D-printing are described. To confirm the effectiveness of the developed algorithms and mathematical model, the tensile strength of an ABS plastic part was calculated at the specified printing parameters. It is concluded that the use of the developed program will allow one to assign optimal printing parameters and obtain products with a given margin of safety.
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Chen, Tin-Chih Toly. "Fuzzy approach for production planning by using a three-dimensional printing-based ubiquitous manufacturing system." Artificial Intelligence for Engineering Design, Analysis and Manufacturing 33, no. 4 (August 15, 2019): 458–68. http://dx.doi.org/10.1017/s0890060419000222.
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AbstractA ubiquitous manufacturing (UM) system is used in manufacturing for obtaining the Internet of things solutions and provides location-based manufacturing services. Human-induced uncertainty and early termination are two complications that hamper the effectiveness of an UM system based on three-dimensional (3D) printing. To resolve these complications, several solutions were considered in this study. First, fuzzy-valued parameters were defined to determine uncertainty. Subsequently, slack was derived to determine whether to restart an early terminated 3D printing process in the same 3D printing facility. Consequently, two optimization models – a fuzzy mixed-integer linear programming model and a fuzzy mixed-integer quadratic programming model – were developed in this study. Based on the two optimization models, a fuzzy 3D printing-based UM system that considers uncertainty and early termination was developed. The effectiveness of the proposed methodology was tested by conducting a regional experiment. The experimental results revealed that the proposed methodology could shorten the average cycle time by 9% and could enable 3D printing facilities to make real-time, online reprinting decisions.
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Wang, Yushan, Yi Xiang, Qiaoqiao Tian, Wei Luo, Hao Fan, Peng Ren, Zhi Lv, et al. "Application of Image-Fusion 3D Printing Model in Total En Bloc Spondylectomy for Spinal Malignant Tumors." Journal of Healthcare Engineering 2022 (August 31, 2022): 1–11. http://dx.doi.org/10.1155/2022/7907191.
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Purpose. To examine the effects of 3D printing model in total en bloc spondylectomy (TES). Methods. We performed a retrospective chart review of 41 cases of spinal tumors at our institution between 2017 and 2020, in which TES was applied. There were 19 cases with 3D printing model and 22 cases without 3D printing model. Operation time, intraoperative blood loss, excision range, complications, VAS, and ASIA grades were recorded. Statistical methods were used to analyze the data. KaplanMeier survival curve was made to evaluate the survival. Result. There were significant differences in intraoperative blood loss between the two groups. The rate of R0 resection and tumor envelope preservation were higher in 3D group than that in non-3D group. In 3D group, the complications included surgical site infection (5.2%) and cerebrospinal fluid leak (15.7%). In non-3D group, the complications included cerebrospinal fluid leak (27.3%) and nerve root injury (13.6%). The pain and neurological dysfunction were significantly relieved before and after surgery in 3D group. However, the neurological relief in non-3D group patients was not complete. The VAS scores of non-3D group at 6 months after surgery were much higher than that of 3D group. Conclusion. The application of 3D printing model not only helps surgeons observe the morphology, invasion range, and anatomic relationship of the tumor preoperatively, but also assists surgeons to judge, locate, and separate the tumor intraoperatively. For spinal malignancies, the 3D printing model is worth promoting.
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Hu, Qingxi, Die Feng, Haiguang Zhang, Yuan Yao, Mohamed Aburaia, and Herfried Lammer. "Oriented to Multi-Branched Structure Unsupported 3D Printing Method Research." Materials 13, no. 9 (April 26, 2020): 2023. http://dx.doi.org/10.3390/ma13092023.
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For the traditional three-axis (3D) configuration of the additive manufacturing (AM) platform, when printing the target model with a multi-branched structure, it is imperative to construct adequate support structures. To eliminate the use of support during the printing process, a non-directional unsupported 3D printing method for five-axis AM is proposed in this paper. By carrying out the K-means clustering algorithm, the coarse partition of the model is obtained, and then the fine decomposition represented by a sequence of separating planes is determined by a local dynamic search adjustment algorithm according to manufacturing constraints. The multi-branched structure of the model is divided into simple subparts so that the general model can be built in different directions and be printed with its own parts as the support. Two case studies were carried out for verification. The experimental results showed that the branch-model can be printed without support using the non-directional unsupported 3D printing method, and the non-directional unsupported 3D printing can save 18.72–20.60% of materials and 20.60–23.33% of time compared to conventional 3D printing.
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HUSIEV, O. V., and T. D. NIKIFOROVA. "RESEARCH OF THE CONVERTING STAGES FOR THE VOLUME MODEL OF THE PRODUCT INTO THE CONTROL CODE FOR A 3D PRINTER IN THE CONTEXT OF AUTOMATED CONSTRUCTION OF 3D PRINTING TECHNOLOGY." Ukrainian Journal of Civil Engineering and Architecture, no. 4 (October 22, 2022): 38–45. http://dx.doi.org/10.30838/j.bpsacea.2312.250822.38.876.
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Problem statement. The integration of the latest technologies in the field of software at the stages of construction appears as one of the main tasks for designers. Creating objects based on 3D printing technology requires the use of appropriate high-tech solutions. One of these solutions is the analysis of the converting process a three-dimensional model into a control code for 3D printing − it is precisely from this analysis that the degree of construction efficiency for building structures by the 3D printing method depends. The purpose of the article. Based on the analysis of 3D printing concepts and modern software, form a conceptual diagram of the converting stages for the product three-dimensional model into a control code for 3D printers. Determine shortcomings that can complicate the implementation of this process. Conclusions. The working process of 3D printing is complex and requires in-depth knowledge of both the software and hardware of the system as a whole. A detailed study of this issue will further optimize the planning of construction processes, which in turn plays an important role in the overall efficiency of the 3D printing system. The use of 3D computer graphics programs may not include models’ specific features that will be key importance for 3D printing. Surface tessellation done in CAD for modeling often ends up with errors in the *.STL data structure in the form of gaps and holes, resulting in open loops in cross-sections that cannot be fabricated as layers in practice. When converting 3D models to *.STL format automatically, with the help of specialized software packages, you should take the time to thoroughly check the STL format. G-code is the first step towards understanding the digital software control of a 3D printer. It can be generated automatically, which can lead to a large number of errors. At the converting stage of the 3D model into *.STL format and in the direct process of G-code generation, highly qualified interdisciplinary specialists who are able to combine these technologies in practice.