Journal articles on the topic 'Large scale 3D printing'
To see the other types of publications on this topic, follow the link: Large scale 3D printing.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Large scale 3D printing.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Lavine, Marc S. "Large-scale, continuous 3D printing." Science 366, no. 6463 (October 17, 2019): 320.3–320. http://dx.doi.org/10.1126/science.366.6463.320-c.
Full text
2
Al Jassmi, Hamad, Fady Al Najjar, and Abdel-Hamid Ismail Mourad. "Large-Scale 3D Printing: The Way Forward." IOP Conference Series: Materials Science and Engineering 324 (March 2018): 012088. http://dx.doi.org/10.1088/1757-899x/324/1/012088.
Full text
3
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.
Full textAbstract:
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.
4
Puzatova, Anastasia, Pshtiwan Shakor, Vittoria Laghi, and Maria Dmitrieva. "Large-Scale 3D Printing for Construction Application by Means of Robotic Arm and Gantry 3D Printer: A Review." Buildings 12, no. 11 (November 18, 2022): 2023. http://dx.doi.org/10.3390/buildings12112023.
Full textAbstract:
Additive manufacturing technologies are becoming more popular in various industries, including the construction industry. Currently, construction 3D printing is sufficiently well studied from an academic point of view, leading towards the transition from experimental to mass large-scale construction. Most questions arise about the applicability of construction 3D printers for printing entire buildings and structures. This paper provides an overview of the different types of construction 3D printing technologies currently in use, and their fundamental differences, as well as some significant data on the advantages of using these advanced technologies in construction. A description of the requirements for composite printing is also provided, with possible issues that may arise when switching from lab-scale construction printing to mass large-scale printing. All printers using additive manufacturing technologies for construction are divided into three types: robotic arm printers, portal-type printers, and gantry 3D printers. It is noted that gantry printers are more suitable for large-scale printing since some of their configurations have the ability to construct buildings that are practically unlimited in size. In addition, all printers are not capable of printing with concrete containing a coarse aggregate, which is a necessary requirement in terms of the strength and economic feasibility of 3D printing material for large-scale applications.
5
Krčma, Martin, David Škaroupka, Petr Vosynek, Tomáš Zikmund, Jozef Kaiser, and David Palousek. "Use of polymer concrete for large-scale 3D printing." Rapid Prototyping Journal 27, no. 3 (February 27, 2021): 465–74. http://dx.doi.org/10.1108/rpj-12-2019-0316.
Full textAbstract:
Purpose This paper aims to focus on the evaluation of a polymer concrete as a three-dimensional (3D) printing material. An associated company has developed plastic concrete made from reused unrecyclable plastic waste. Its intended use is as a construction material. Design/methodology/approach The concrete mix, called PolyBet, composed of polypropylene and glass sand, is printed by the fused deposition modelling process. The process of material and parameter selection is described. The mechanical properties of the filled material were compared to its cast state. Samples were made from castings and two different orientations of 3D-printed parts. Three-point flex tests were carried out, and the area of the break was examined. Computed tomography of the samples was carried out. Findings The influence of the 3D printing process on the material was evaluated. The mechanical performance of the longitudinal samples was close to the cast state. There was a difference in the failure mode between the states, with cast parts exhibiting a tougher behaviour, with fractures propagating in a stair-like manner. The 3D-printed samples exhibited high degrees of porosity. Originality/value The results suggest that the novel material is a good fit for 3D printing, with little to no degradation caused by the process. Layer adhesion was shown to be excellent, with negligible effect on the finished part for the longitudinal orientation. That means, if large-scale testing of buildability is successful, the material is a good fit for additive manufacturing of building components and other large-scale structures.
6
Izard, Jean-Baptiste, Alexandre Dubor, Pierre-Elie Hervé, Edouard Cabay, David Culla, Mariola Rodriguez, and Mikel Barrado. "Large-scale 3D printing with cable-driven parallel robots." Construction Robotics 1, no. 1-4 (August 30, 2017): 69–76. http://dx.doi.org/10.1007/s41693-017-0008-0.
Full text
7
Barnett, Eric, and Clément Gosselin. "Large-scale 3D printing with a cable-suspended robot." Additive Manufacturing 7 (July 2015): 27–44. http://dx.doi.org/10.1016/j.addma.2015.05.001.
Full text
8
He, Jianjia, Jian Wu, Ye Zhang, Yaopeng Wang, and Hua He. "Large-Scale Customized Production Scheduling of Multiagent-Based Medical 3D Printing." Computational Intelligence and Neuroscience 2022 (July 18, 2022): 1–13. http://dx.doi.org/10.1155/2022/6557137.
Full textAbstract:
Three-dimensional (3D) printing, also known as additive manufacturing, has unique advantages over traditional manufacturing technologies; thus, it has attracted widespread attention in the medical field. Especially in the context of the frequent occurrence of major public health events, where the medical industry’s demand for large-scale and customized production is increasing, traditional 3D printing production scheduling methods take a long time to handle large-scale customized medical 3D printing (M-3DP) production and have weak intelligent collaboration ability in the face of job-to-device matching under multimaterial printing. Given the problem caused by M-3DP large-scale customized production scheduling, an intelligent collaborative scheduling multiagent-based method is proposed in this study. First, a multiagent-based optimization model is established. On this basis, an improved genetic algorithm embedded with the product mix strategy and the intelligent matching mechanism is designed to optimize the completion time and load balance between devices. Finally, the effectiveness of the proposed method is evaluated using numerical simulation. The simulation results indicated that compared with the simple genetic algorithm, particle swarm optimization, and snake optimizer, the improved genetic algorithm could better reduce the M-3DP mass customization production scheduling time, optimize the load balance between devices, and promote the “intelligent manufacturing” process of M-3DP mass customization.
9
Lv, Jianran, Hongyao Shen, and Jianzhong Fu. "Large-scale 3D printing technology based on the visual stitching method." Rapid Prototyping Journal 25, no. 7 (August 12, 2019): 1232–40. http://dx.doi.org/10.1108/rpj-03-2019-0059.
Full textAbstract:
Purpose 3D printing for objects whose size exceeds the scope of the printer is still a tough challenge in application. The purpose of this paper is to propose a visual stitching large-scale (VSLS) 3D-printing method to solve this problem. Design/methodology/approach The single segmentation point method and multiple segmentation point method are proposed to adaptively divide each slice of the model into several segments. For each layer, the mobile robot will move to different positions to print each segment, and every time it arrives at the planned location, the contours of the printed segments are captured with a high-definition camera by the feature point recognition algorithm. Then, the coordinate transformation is implemented to adjust the printing codes of the next segment so that each part can be perfectly aligned. The authors print up layer by layer in this manner until the model is complete. Findings In Section 3, two specimens, whose sizes are 166 per cent and 252 per cent of the scope of the 3D-printing robot, are successfully printed. Meanwhile, the completed models of the specimens are printed using a suitable traditional printer for comparison. The result shows that the specimens in the test group have basically identical sizes to those in the control group, which verifies the feasibility of the VSLS method. Originality/value Unlike most of the current solutions that demand harsh requirement for positioning accuracy of the mobile robots, the authors use a camera to compensate for the lost positioning accuracy of the device during movement, thereby avoiding precise control to the device’s location. And the coordinate transformation is implemented to adjust the printing codes of the next sub-models so that each part can be aligned perfectly.
10
Zhang, Xu, Mingyang Li, Jian Hui Lim, Yiwei Weng, Yi Wei Daniel Tay, Hung Pham, and Quang-Cuong Pham. "Large-scale 3D printing by a team of mobile robots." Automation in Construction 95 (November 2018): 98–106. http://dx.doi.org/10.1016/j.autcon.2018.08.004.
Full text
11
Wang, Peng, Wei Chu, Wenbo Li, Yuanxin Tan, Fang Liu, Min Wang, Jia Qi, et al. "Three-Dimensional Laser Printing of Macro-Scale Glass Objects at a Micro-Scale Resolution." Micromachines 10, no. 9 (August 26, 2019): 565. http://dx.doi.org/10.3390/mi10090565.
Full textAbstract:
Three-dimensional (3D) printing has allowed for the production of geometrically complex 3D objects with extreme flexibility, which is currently undergoing rapid expansion in terms of materials, functionalities, as well as areas of application. When attempting to print 3D microstructures in glass, femtosecond laser-induced chemical etching (FLICE)—which is a subtractive 3D printing technique—has proved itself a powerful approach. Here, we demonstrate the fabrication of macro-scale 3D glass objects of large heights up to ~3.8 cm with an identical lateral and longitudinal feature size of ~20 μm. The remarkable accomplishment is achieved by revealing an unexplored regime in the interaction of ultrafast laser pulses with fused silica, which results in depth-insensitive focusing of the laser pulses inside fused silica.
12
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.
Full textAbstract:
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
13
Zuo, Han, Zenghe Liu, Luzhi Zhang, Gengxin Liu, Xikai Ouyang, Qingbao Guan, Qilin Wu, and Zhengwei You. "Self-healing materials enable free-standing seamless large-scale 3D printing." Science China Materials 64, no. 7 (March 17, 2021): 1791–800. http://dx.doi.org/10.1007/s40843-020-1603-y.
Full text
14
Xiao, Jianzhuang, Guangchao Ji, Yamei Zhang, Guowei Ma, Viktor Mechtcherine, Jinlong Pan, Li Wang, Tao Ding, Zhenhua Duan, and Shupeng Du. "Large-scale 3D printing concrete technology: Current status and future opportunities." Cement and Concrete Composites 122 (September 2021): 104115. http://dx.doi.org/10.1016/j.cemconcomp.2021.104115.
Full text
15
Zhao, Xianhui, Halil Tekinalp, Xianzhi Meng, Darby Ker, Bowie Benson, Yunqiao Pu, Arthur J. Ragauskas, et al. "Poplar as Biofiber Reinforcement in Composites for Large-Scale 3D Printing." ACS Applied Bio Materials 2, no. 10 (September 18, 2019): 4557–70. http://dx.doi.org/10.1021/acsabm.9b00675.
Full text
16
Guimarães, Ana S., João M. P. Q. Delgado, and Sandra S. Lucas. "Advanced Manufacturing in Civil Engineering." Energies 14, no. 15 (July 24, 2021): 4474. http://dx.doi.org/10.3390/en14154474.
Full textAbstract:
The main goal of this work is the analysis of potential energy and green benefits of 3D printing on building construction. Current literature reports a considerable number of benefits for 3D printing, namely, reduction of material use, lower operational costs and time-saving. The authors also mention design freedom, higher efficiency, productivity and quality. This work presents the latest developments in 3D printing in civil engineering, namely, a review of the last 3D printing projects and the limitations of construction 3D printing with a focus on large-scale applications, technology costs, mix development and optimisation and thermal behaviour.
17
Guimarães, A. S., J. M. P. Q. Delgado, and S. S. Lucas. "Thermal and Environmental Benefits of 3D Printing on Building Construction." Defect and Diffusion Forum 412 (November 12, 2021): 99–106. http://dx.doi.org/10.4028/www.scientific.net/ddf.412.99.
Full textAbstract:
The main goal of this work is the analysis of the thermal and environmental benefits of 3D printing on building construction. Present literature reports a considerable number of benefits for 3D printing, namely reduction of material use, lower operational costs and time saving. Authors also mention design freedom, higher efficiency, productivity and quality. This work presents the most important advances in 3D printing in civil engineering, specifically, a critical review of the thermal and environmental benefits of 3D printing on building construction. The limitations of construction 3D printing with focus on large-scale applications, technology costs, mix development and optimisation and thermal behaviour will be, also, defined.
18
Gyimah, Nafisat, Ott Scheler, Toomas Rang, and Tamas Pardy. "Can 3D Printing Bring Droplet Microfluidics to Every Lab?—A Systematic Review." Micromachines 12, no. 3 (March 22, 2021): 339. http://dx.doi.org/10.3390/mi12030339.
Full textAbstract:
In recent years, additive manufacturing has steadily gained attention in both research and industry. Applications range from prototyping to small-scale production, with 3D printing offering reduced logistics overheads, better design flexibility and ease of use compared with traditional fabrication methods. In addition, printer and material costs have also decreased rapidly. These advantages make 3D printing attractive for application in microfluidic chip fabrication. However, 3D printing microfluidics is still a new area. Is the technology mature enough to print complex microchannel geometries, such as droplet microfluidics? Can 3D-printed droplet microfluidic chips be used in biological or chemical applications? Is 3D printing mature enough to be used in every research lab? These are the questions we will seek answers to in our systematic review. We will analyze (1) the key performance metrics of 3D-printed droplet microfluidics and (2) existing biological or chemical application areas. In addition, we evaluate (3) the potential of large-scale application of 3D printing microfluidics. Finally, (4) we discuss how 3D printing and digital design automation could trivialize microfluidic chip fabrication in the long term. Based on our analysis, we can conclude that today, 3D printers could already be used in every research lab. Printing droplet microfluidics is also a possibility, albeit with some challenges discussed in this review.
19
Chen, Linyi, Guangxue Chen, Liyu Liao, and Haozhi Chen. "Naked-Eye 3D Display Based on Microlens Array Using Combined Micro-Nano Imprint and UV Offset Printing Methods." Molecules 25, no. 9 (April 25, 2020): 2012. http://dx.doi.org/10.3390/molecules25092012.
Full textAbstract:
An optical film integrating microlens array (MLAs) and 3D micro-graphics is an important way to achieve the naked-eye 3D display effect. The 3D micro-graphics is traditionally generated by the micro-nano imprint technology based on precision engraving mold, which leads to high production cost and low production efficiency, and thus restricts the rapid response to production tasks and large-scale popularization and application. In this study, a process scheme for large-scale printing of 3D micro-graphics using UV offset printing based on presensitized (PS) plate was proposed, matching with the MLAs fabricated by micro-nano imprint process to achieve naked-eye 3D display effect. We used the laser confocal microscope to systematically measure and analyze the geometric and optical performance of the fabricated MLAs in terms of height, curvature radius, center distance, spacing, focal length, and numerical aperture, and evaluated the influence of the publishing resolution of the PS plate on the display effect of 3D micro-graphics. The printing quality and display effect of 3D micro-graphics were further improved by adjusting process parameters such as printing speed and printing pressure. The results of the current study demonstrate that the combined application of micro-nano imprint technology based on precision mold and UV offset printing technology based on PS plate can achieve an excellent naked-eye 3D display effect in 360° all angles, which is efficient, cost-saving, and highly flexible.
20
Zhong, Chongliang, Jianing Liu, Gerhard Backes, Tong Zhao, Thomas Schopphoven, and Andres Gasser. "3D printing of large-scale components of titanium alloys under open atmosphere." Materials Today Communications 28 (September 2021): 102688. http://dx.doi.org/10.1016/j.mtcomm.2021.102688.
Full text
21
SHAHZAD, Qamar, Muhammad UMAİR, and Saad WAQAR. "Bibliographic analysis on 3D printing in the building and construction industry: Printing systems, material properties, challenges, and future trends." Journal of Sustainable Construction Materials and Technologies 7, no. 3 (September 30, 2022): 198–220. http://dx.doi.org/10.47481/jscmt.1143239.
Full textAbstract:
In recent years, significant advancements in the development of large-scale 3D printers and construction materials have been made to meet the demand for industrial scale 3D printing construction. It is significant to construct the buildings and structural components by using 3D concrete printing. Additive manufacturing (AM) main benefits are freedom of design, construction waste reduction, mass customization, and ability to manufacture the complex structures. The major issues including the optimization of printing material which possess the suitable properties for 3D concrete printing. However, this technology towards the green building construction seems to improve the conventional methods by reducing the requirement of human resource, high investment cost, and formworks. The research community's interest in 3D printing for architecture and construction has grown significantly over the last few years. This paper review the latest trend of research and state of the art technologies in 3D printing in building and construction by analyzing the publications from 2002 to 2022. Based on aforementioned analysis of publications, printing methods, concrete printing systems and influence of constituent’s materials and chemical admixtures on concrete material properties are briefly discussed. Finally, this paper discussed the challenges and limitations of current systems, as well as potential future work to improve their capability and print quality.
22
Brites, Fernando, Cândida Malça, Florindo Gaspar, João F. Horta, Margarida C. Franco, Sara Biscaia, and Artur Mateus. "The Use of Polypropylene and High-Density Polyethylene on Cork Plastic Composites for Large Scale 3D Printing." Applied Mechanics and Materials 890 (April 2019): 205–25. http://dx.doi.org/10.4028/www.scientific.net/amm.890.205.
Full textAbstract:
This work focuses on studying the possibility of 3D printing of composite materials composed by cork and a polymer matrix (CPC). Initially the cork was mixed with two types of polymers (HDPE and PP) in different proportions and later processed using extrusion and injection. The composites were tested to study the physical, chemical and mechanical properties. The material was then tested on a large-scale 3D printer to study its feasibility and the ability to produce new products through 3D printing. Attention was focused on the use of pure cork, varying the concentration of cork and coupling agent in thermoplastic matrix composites of PP and HDPE. It was demonstrated that the increase of 5wt.% of coupling agent in the two types of polymers significantly improved the mechanical properties and adhesion between the phases but the increase in cork concentration decreased mechanical properties and crystallinity. The CPCs with PP showed to have better mechanical properties, better aesthetic and internal structural quality, and easier processability than those with HDPE matrix. Nevertheless, the HDPE CPCs showed a high degree of crystallization. Concerning 3D printing, with the filament obtained was demonstrated the possibility of making new products based on natural cork fibers, showing promising results, although additional research is still needed to optimize the process.
23
Hansmeyer, Michael, and Benjamin Dillenburger. "Digital grotesque: Towards a micro-tectonic architecture." SAJ - Serbian Architectural Journal 5, no. 2 (2013): 194–201. http://dx.doi.org/10.5937/saj1302194h.
Full textAbstract:
Computational design allows for architecture with an extraordinary degree of topographical and topological complexity. Limitations of traditional CNC technologies have until recently precluded this architecture from being fabricated. While additive manufacturing has made it possible to materialize these complex forms, this has occurred only at a very small scale. In trying to apply additive manufacturing to the construction of full-scale architecture, one encounters a dilemma: existing large-scale 3D printing methods can only print highly simplified shapes with rough details, while existing high-resolution technologies have limited print spaces, high costs, or material attributes that preclude a structural use. This paper provides a brief background on additive manufacturing technology and presents recent developments in sand-printing technology that overcome current 3D printing restrictions. It then presents a specific experiment, Digital Grotesque project, which is the first application of 3D sand-printing technology at an architecture scale. It describes how this project attempts to exploit the potentials of these new technologies.
24
Li, Guozhu. "Improvement and Experimental Explore on Coordinated Control of Kinematic Mechanism of FDM 3D Printer." Advances in Multimedia 2022 (September 16, 2022): 1–9. http://dx.doi.org/10.1155/2022/4422616.
Full textAbstract:
As the main component of the 3D printing industry, the fused deposition process covers all aspects of the industry with its advantages of low R&D investment, high practicability, and open source programs. However, due to process problems, problems have arisen in terms of printing efficiency and molding quality. To this end, we designed a large-scale multinozzle FDM printing device using the high-current fused deposition (FDM) printing principle. The defects of small size, slow printing speed, and low precision are deeply studied, and the machine structure is optimized according to the structural strength analysis. In this paper, the theoretical design and static analysis of the overall mechanical part of the large-scale FDM device are carried out, and then, the selection of the movement organization structure and movement method is theoretically analyzed. A modular flow chart is designed for the control system to coordinate and control the parallel and precise operation of multiple nozzles, and the relationship function between the main controller, power driver, and heating module is designed. By modifying the firmware parameter command, we can find out the optimal method running on the platform and discuss the function usage of the slicing software in detail. According to the current problems of FDM printing equipment, various factors affecting printing speed were analyzed from the perspective of printing accuracy, and the process parameters of 3D printer were studied through orthogonal experiments. Speed, nozzle temperature, idling speed, and fill rate were studied, and the relationship between factors affecting printing speed and printing accuracy was obtained. Use a simple model print to measure the overall performance of your product. The stability of the system is verified by short-term and long-term printing tests. The analysis results show that the forming performance and stability of the large-scale FDM are improved significantly.
25
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.
Full textAbstract:
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.
26
Jishnu Madabhushi, Aditya Kalamdani, Abhinav Tyagi, and Nita Mehta. "3D printing in chemical engineering: A review." World Journal of Advanced Engineering Technology and Sciences 7, no. 1 (October 30, 2022): 086–95. http://dx.doi.org/10.30574/wjaets.2022.7.1.0097.
Full textAbstract:
3D printing, also known as additive manufacturing has become one of the most revolutionary and powerful tools serving as a technology of precise manufacturing of chemicals ranging from laboratory scale to large scale production. There is constant motivation towards designing new concepts of manufacturing with high efficiency. The introduction of 3D printing technology in the chemical industry has opened new horizons in the research and development of printed materials and equipment. One of the fields of technology, art, and science that is currently advancing the fastest is three-dimensional printing, and its uses are continually expanding. Three important elements play a big role in the rapidly expanding usage of 3D printing. First, as a result of lower raw material costs, increased competitive pressure, and technological developments, 3D printing is becoming increasingly affordable. Second, the rate at which materials can be printed is getting faster. Third, more types of materials can now be used with new 3D printers. A wide variety of polymers, resins, plasticizers, and other materials are being employed to make novel 3D products as a result of advancements in the chemical industry. In this review, we discuss the contribution of three-dimensional printing in the field of chemical engineering.
27
Waqar, Taha, Muhammad Azhar Ali Khan, Muhammad Asad, Faramarz Djavanroodi, and Jamal Nayfeh. "Design and Development of a Mold for Patternless Casting Using AM/3D Printing." Materials Science Forum 1033 (June 2021): 98–102. http://dx.doi.org/10.4028/www.scientific.net/msf.1033.98.
Full textAbstract:
Additive manufacturing is a technology that is influencing every facet of manufacturing such as casting. 3D printing in particular has the potential to revolutionize castings in terms of precision and time taken in production. Patternless molds increase the efficiency of the casting process for large scale manufactured components. Therefore, ceramic based molds can be utilized for low temperature alloy parts such as mounting brackets. Nowadays, 3D printing technologies allow the direct printing of these molds. This is possible with the aid of CAD modelling of the casting mold which allows instant printing of patternless molds. The aim of this work is to introduce an approach to prepare a 3D design for a casting mold that can be manufactured using 3D printing technology. Mold design was made using Solidworks software according to standardized calculations from which cope and drag components were extracted. Candidates for potential mold material are highlighted along with advantages & limitations of utilizing 3D printing methodology.
28
Abdalla, Hadeer, Kazi Parvez Fattah, Mohamed Abdallah, and Adil K. Tamimi. "Environmental Footprint and Economics of a Full-Scale 3D-Printed House." Sustainability 13, no. 21 (October 29, 2021): 11978. http://dx.doi.org/10.3390/su132111978.
Full textAbstract:
3D printing, is a newly adopted technique in the construction sector with the aim to improve the economics and alleviate environmental impacts. This study assesses the eco-efficiency of 3D printing compared to conventional construction methods in large-scale structural fabrication. A single-storey 3D-printed house was selected in the United Arab Emirates to conduct the comparative assessment against traditional concrete construction. The life cycle assessment (LCA) framework is utilized to quantify the environmental loads of raw materials extraction and manufacturing, as well as energy consumption during construction and operation phases. The economics of the selected structural systems were investigated through life cycle costing analysis (LCCA), that included mainly the construction costs and energy savings. An eco-efficiency analysis was employed to aggregate the results of the LCA and LCCA into a single framework to aid in decision making by selecting the optimum and most eco-efficient alternative. The findings revealed that houses built using additive manufacturing and 3D printed materials were more environmentally favourable. The conventional construction method had higher impacts when compared to the 3D printing method with global warming potential of 1154.20 and 608.55 kg CO2 eq, non-carcinogenic toxicity 675.10 and 11.9 kg 1,4-DCB, and water consumption 233.35 and 183.95 m3, respectively. The 3D printed house was also found to be an economically viable option, with 78% reduction in the overall capital costs when compared to conventional construction methods. The combined environmental and economic results revealed that the overall process of the 3D-printed house had higher eco efficiency compared to concrete-based construction. The main results of the sensitivity analysis revealed that up to 90% of the environmental impacts in 3D printing mortars can be mitigated with decreasing cement ratios.
29
Bao, Ding Wen, Xin Yan, and Yi Min Xie. "Fabricating Topologically Optimized Tree-Like Pavilions Using Large-Scale Robotic 3D Printing Techniques." Journal of the International Association for Shell and Spatial Structures 63, no. 2 (June 1, 2022): 122–31. http://dx.doi.org/10.20898/j.iass.2022.009.
Full textAbstract:
This research addresses innovations in building structural components through the generative design technique Bi-directional Evolutionary Structural Optimization (BESO) and the application of large-scale 3D robotic printing to produce efficient and elegant spatial structures. The innovative pavilion discussed in this paper demonstrates a design process and the ambitions of the research group through a full-scale model of large-span spatial structures. The focus of this work is the use of a modified BESO technique to optimize the structure, which features branches of various sizes and then applies 'skin' surfaces according to the direction of the main structure. The innovative production, construction, and assembling methodologies are to replace welded ultimately, forged, and cast components with large robotic 3D printed components and bolting methods. The advantages of the new design and construction process are less labor, fewer joints, shorter assembling time, lower cost & more efficient material usage and more complex & elegant large structural form.
30
Mai, Inka, Leon Brohmann, Niklas Freund, Stefan Gantner, Harald Kloft, Dirk Lowke, and Norman Hack. "Large Particle 3D Concrete Printing—A Green and Viable Solution." Materials 14, no. 20 (October 15, 2021): 6125. http://dx.doi.org/10.3390/ma14206125.
Full textAbstract:
The Large Particle 3D Concrete Printing (LP3DCP) process presented in this paper is based on the particle bed 3D printing method; here, the integration of significantly larger particles (up to 36 mm) for selective binding using the shotcrete technique is presented. In the LP3DCP process, the integration of large particles, i.e., naturally coarse, crushed or recycled aggregates, reduces the cement volume fraction by more than 50% compared to structures conventionally printed with mortar. Hence, with LP3DCP, the global warming potential, the acidification potential and the total non-renewable primary energy of 3D printed structures can be reduced by approximately 30%. Additionally, the increased proportion of aggregates enables higher compressive strengths than without the coarse aggregates, ranging up to 65 MPa. This article presents fundamental material investigations on particle packing and matrix penetration as well as compressive strength tests and geometry studies. The results of this systematic investigation are presented, and the best set is applied to produce a large-scale demonstrator of one cubic meter of size and complex geometry. Moreover, the demonstrator features reinforcement and subtractive surface processing strategies. Further improvements of the LP3DCP technology as well as construction applications and architectural design potentials are discussed thereafter.
31
Mechtcherine, Viktor, Venkatesh Naidu Nerella, Frank Will, Mathias Näther, Jens Otto, and Martin Krause. "Large-scale digital concrete construction – CONPrint3D concept for on-site, monolithic 3D-printing." Automation in Construction 107 (November 2019): 102933. http://dx.doi.org/10.1016/j.autcon.2019.102933.
Full text
32
Olowe, Michael, Santosh Kumar Parupelli, and Salil Desai. "A Review of 3D-Printing of Microneedles." Pharmaceutics 14, no. 12 (December 1, 2022): 2693. http://dx.doi.org/10.3390/pharmaceutics14122693.
Full textAbstract:
Microneedles are micron-sized devices that are used for the transdermal administration of a wide range of active pharmaceutics substances with minimally invasive pain. In the past decade, various additive manufacturing technologies have been used for the fabrication of microneedles; however, they have limitations due to material compatibility and bioavailability and are time-consuming and expensive processes. Additive manufacturing (AM), which is popularly known as 3D-printing, is an innovative technology that builds three-dimensional solid objects (3D). This article provides a comprehensive review of the different 3D-printing technologies that have the potential to revolutionize the manufacturing of microneedles. The application of 3D-printed microneedles in various fields, such as drug delivery, vaccine delivery, cosmetics, therapy, tissue engineering, and diagnostics, are presented. This review also enumerates the challenges that are posed by the 3D-printing technologies, including the manufacturing cost, which limits its viability for large-scale production, the compatibility of the microneedle-based materials with human cells, and concerns around the efficient administration of large dosages of loaded microneedles. Furthermore, the optimization of microneedle design parameters and features for the best printing outcomes is of paramount interest. The Food and Drug Administration (FDA) regulatory guidelines relating to the safe use of microneedle devices are outlined. Finally, this review delineates the implementation of futuristic technologies, such as artificial intelligence algorithms, for 3D-printed microneedles and 4D-printing capabilities.
33
Brathikan, V. M., S. Balasubramanian, S. Kiranlal, and R. Ravi Ragul. "Design and development of large scale FDM based 3D printer." Journal of Physics: Conference Series 2272, no. 1 (July 1, 2022): 012016. http://dx.doi.org/10.1088/1742-6596/2272/1/012016.
Full textAbstract:
Abstract Additive Layer Manufacturing (ALM) is one of the fabricating methods because it permits outrageous customization, quick prototyping of wanted designs and low volume creation of items. FDM printer goes under the material expulsion class. The filament is constrained into the hot extruder. The filament is warmed first and afterward stored, through the spout, onto a form stage layer-by-layer to frame the total 3D structure. A printer equipped for printing a 1.5-meter cubic-sized object was designed in SOLIDWORKS CAD software and manufactured into a functioning model. The Frame, Linear guide rail, and Z-axis rails were subjected to static structural, modal and harmonic response analysis with ANSYS Workbench. The designed parts were investigated by modal analysis to get the natural frequency. The effect on the guide rails and frame due to external forces, stepper motor, and extruder were examined with harmonic response analysis. The frequency at which the amplitude rises drastically from a phase angle of 0 degrees to 180 degrees was obtained using harmonic response analysis as well. The model was further subjected to motion analysis using ADAMS dynamic software.
34
Zhao, Donghua, Weizhong Guo, Baibing Zhang, and Feng Gao. "3D sand mould printing: a review and a new approach." Rapid Prototyping Journal 24, no. 2 (March 12, 2018): 285–300. http://dx.doi.org/10.1108/rpj-05-2016-0088.
Full textAbstract:
Purpose The purpose of this paper is to review available technologies, analyse their features, propose a new approach of 3D sand mould printing based on line forming, introduce the manufacturing principle and show advantages of this approach, especially for larger parts with large Z steps in the build, such as 2 mm stepwise. Design/methodology/approach This paper introduces 3D sand mould printing, compares and analyses technological process and existing fabrication approaches among available technologies first. Then, a new approach of 3D sand mould printing is proposed to improve build speed. In addition, the proposed system will be analysed or benchmarked against existing systems. Findings A new approach based on line forming of sand mould printing is put forward by reviewing and analysing available technologies, to improve build speed from the aspect of basic moulding movement instead of optimization of moulding methods and process parameters. The theoretical calculation and analysis shows that build speed can be improved greatly, and it is more suitable for the manufacture of large-scale casting’s sand mould when considering dimensional accuracy and printing error, as well as uniformity of each layer. Research limitations/implications The specific implement scheme of line forming and nozzle’s specific structure of this new approach need further study. Practical implications Much higher build speed of 3D sand mould printing with new approach brings evident implication for moulds companies and manufacturing industry, having a far-reaching influence on the development of national economy. Originality/value This paper reviews available technologies and presents a new approach of 3D sand mould printing for the first time. Analysis of the new approach shows that this new method of sand mould printing can boost build speed greatly. So, its application prospect is great.
35
Schertel, Lukas, Sofia Magkiriadou, Pavel Yazhgur, and Ahmet Demirörs. "Manufacturing Large-scale Materials with Structural Color." CHIMIA 76, no. 10 (October 26, 2022): 833. http://dx.doi.org/10.2533/chimia.2022.833.
Full textAbstract:
Living organisms frequently use structural color for coloration as an alternative mechanism to chemical pigmentation. Recently there has been a growing interest to translate structural color into synthetic materials as a more durable and less hazardous alternative to conventional pigments. Efforts to fabricate structurally colored materials take place in different fronts, from 3D printing to spray-coating and roll-to-roll casting. Stability, performance, and quality of the color, the environmental impact of the materials or their manufacturing methods are some of the heavily researched topics we discuss. First, we highlight recent examples of large-scale manufacturing technologies to fabricate structurally colored objects. Second, we discuss the current challenges to be tackled to create perfect appearances which aim at the full color gamut while caring for environmental concerns. Finally, we discuss possible scenarios that could be followed in order to involve other manufacturing methods for creating structurally colored objects.
36
Hossain, Md Aslam, Altynay Zhumabekova, Suvash Chandra Paul, and Jong Ryeol Kim. "A Review of 3D Printing in Construction and its Impact on the Labor Market." Sustainability 12, no. 20 (October 15, 2020): 8492. http://dx.doi.org/10.3390/su12208492.
Full textAbstract:
Construction industry is very labor-intensive and one of the major sources of employment in the world. The industry is experiencing low productivity with minimum technological innovations for decades. In recent times, various automation technologies including 3D printing have received increasing interests in construction. 3D printing in construction is found to be very promising to automate the construction processes and have the potential of saving laborious work, material waste, construction time, risky operation for humans, etc. There has been a comprehensive body of research conducted to understand the recent advances, future prospects and challenges of large-scale adoption of 3D printing in construction projects. Being one the labor-intensive industries, this study also investigates the possible impact on the labor market with increasing adoption of 3D printing in construction. It is found that 3D printing can reduce significant number of labors which can solve the labor shortage problem, especially for the countries where construction is heavily dependent on immigrant workers. In contrast, 3D printing might not be favorable for the countries where construction is one of the main workforces and labor is less expensive. Moreover, 3D construction printing will also require people with special skills related to this new technology.
37
Thanh Tam, Le Thi, Doan Thanh Tung, Ha Minh Nguyet, Nguyen Thi Ngoc Linh, Ngo Thanh Dung, Nguyen Van Quynh, Nguyen Van Dang, et al. "High electrochemical performance of ink solution based on manganese cobalt sulfide/reduced graphene oxide nano-composites for supercapacitor electrode materials." RSC Advances 12, no. 31 (2022): 20182–90. http://dx.doi.org/10.1039/d2ra02818b.
Full textAbstract:
Large scale supercapacitor electrodes were prepared by 3D-printing directly on a graphite paper substrate from ink solution containing manganese cobalt sulfide/reduced graphene oxide (MCS/rGO) nanocomposites.
38
Malik, Abrar, Mir Irfan Ul Haq, Ankush Raina, and Kapil Gupta. "3D printing towards implementing Industry 4.0: sustainability aspects, barriers and challenges." Industrial Robot: the international journal of robotics research and application 49, no. 3 (January 18, 2022): 491–511. http://dx.doi.org/10.1108/ir-10-2021-0247.
Full textAbstract:
Purpose Environmental degradation has emerged as one of the major limitations of industrial revolution and has led to an increased focus towards developing sustainable strategies and techniques. This paper aims to highlight the sustainability aspects of three-dimensional (3D) printing technology that helps towards a better implementation of Industry 4.0. It also aims to provide a brief picture of relationships between 3D printing, Industry 4.0 and sustainability. The major goal is to facilitate the researchers, scholars, engineers and recommend further research, development and innovations in the field. Design/methodology/approach The various enabling factors for implementation of Industry 4.0 are discussed in detail. Some barriers to incorporation of 3D Printing, its applications areas and global market scenario are also discussed. A through literature review has been done to study the detailed relationships between 3D printing, Industry 4.0 and sustainability. Findings The technological benefits of 3D printing are many such as weight savings, waste minimization and energy savings. Further, the production of new 3D printable materials with improved features helps in reducing the wastage of material during the process. 3D printing if used at a large scale would help industries to implement the concept of Industry 4.0. Originality/value This paper focuses on discussing technological revolution under Industry 4.0 and incorporates 3D printing-type technologies that largely change the product manufacturing scenario. The interrelationships between 3D printing, Industry 4.0 and sustainability have been discussed.
39
Tho, Tuong Phuoc, and Nguyen Truong Thinh. "Using a Cable-Driven Parallel Robot with Applications in 3D Concrete Printing." Applied Sciences 11, no. 2 (January 8, 2021): 563. http://dx.doi.org/10.3390/app11020563.
Full textAbstract:
In construction, a large-scale 3D printing method for construction is used to build houses quickly, based on Computerized Aid Design. Currently, the construction industry is beginning to apply quite a lot of 3D printing technologies to create buildings that require a quick construction time and complex structures that classical methods cannot implement. In this paper, a Cable-Driven Parallel Robot (CDPR) is described for the 3D printing of concrete for building a house. The CDPR structures are designed to be suitable for 3D printing in a large workspace. A linear programming algorithm was used to quickly calculate the inverse kinematic problem with the force equilibrium condition for the moving platform; this method is suitable for the flexible configuration of a CDPR corresponding to the various spaces. Cable sagging was also analyzed by the Trust-Region-Dogleg algorithm to increase the accuracy of the inverse kinematic problem for controlling the robot to perform basic trajectory interpolation movements. The paper also covers the design and analysis of a concrete extruder for the 3D printing method. The analytical results are experimented with based on a prototype of the CDPR to evaluate the work ability and suitability of this design. The results show that this design is suitable for 3D printing in construction, with high precision and a stable trajectory printing. The robot configuration can be easily adjusted and calculated to suit the construction space, while maintaining rigidity as well as an adequate operating space. The actuators are compact, easy to disassemble and move, and capable of accommodating a wide variety of dimensions.
40
Tho, Tuong Phuoc, and Nguyen Truong Thinh. "Using a Cable-Driven Parallel Robot with Applications in 3D Concrete Printing." Applied Sciences 11, no. 2 (January 8, 2021): 563. http://dx.doi.org/10.3390/app11020563.
Full textAbstract:
In construction, a large-scale 3D printing method for construction is used to build houses quickly, based on Computerized Aid Design. Currently, the construction industry is beginning to apply quite a lot of 3D printing technologies to create buildings that require a quick construction time and complex structures that classical methods cannot implement. In this paper, a Cable-Driven Parallel Robot (CDPR) is described for the 3D printing of concrete for building a house. The CDPR structures are designed to be suitable for 3D printing in a large workspace. A linear programming algorithm was used to quickly calculate the inverse kinematic problem with the force equilibrium condition for the moving platform; this method is suitable for the flexible configuration of a CDPR corresponding to the various spaces. Cable sagging was also analyzed by the Trust-Region-Dogleg algorithm to increase the accuracy of the inverse kinematic problem for controlling the robot to perform basic trajectory interpolation movements. The paper also covers the design and analysis of a concrete extruder for the 3D printing method. The analytical results are experimented with based on a prototype of the CDPR to evaluate the work ability and suitability of this design. The results show that this design is suitable for 3D printing in construction, with high precision and a stable trajectory printing. The robot configuration can be easily adjusted and calculated to suit the construction space, while maintaining rigidity as well as an adequate operating space. The actuators are compact, easy to disassemble and move, and capable of accommodating a wide variety of dimensions.
41
Shalenko, Vadym, Boris Korniychuk, and Andriі Masluyk. "Z-axis limit switch 3D printer." Gіrnichі, budіvelnі, dorozhnі ta melіorativnі mashini, no. 96 (December 31, 2020): 22–27. http://dx.doi.org/10.32347/gbdmm2020.96.0301.
Full textAbstract:
Not much time has passed since the appearance of the first 3D printer. Today there are many different printers. They differ in various 3D printing technologies, namely: Stereolithography – SL, Selective Laser Sintering, Fused Deposition Modeling – FDM, Laminated Object Manufacturing – LOM, Polyjet and Ployjet Matrix.
In recent years, the spread of 3D printing technology has become and continues to be used more and more today. Of course, in the future we will see a large-scale spread of additive methods, but the practical application of 3D printing today is available to everyone. Melting deposition modeling technologies have become widespread and available.
The authors in this article consider possible options for upgrading the mounting of the end sensor of the Z Axis and automating the process of calibration of the zero gap of the extruder nozzle relative to the working surface of the printer. This calibration is important. This affects the accuracy and printing process of the future plastic model.
During the operation of the 3D printer, it is often necessary to service the extruder, which forces the process of calibrating the zero gap of the printer nozzle. Optimally correct selected nozzle clearance affects the accuracy, geometry of the model and printing as a whole. It also allows you to get rid of peeling off the model from the desktop surface and the destruction of the model during printing.
42
Moldenhauer, Daniel, Doan Chau Yen Nguyen, Lisa Jescheck, Franz Hack, Dagmar Fischer, and Achim Schneeberger. "3D screen printing – An innovative technology for large-scale manufacturing of pharmaceutical dosage forms." International Journal of Pharmaceutics 592 (January 2021): 120096. http://dx.doi.org/10.1016/j.ijpharm.2020.120096.
Full text
43
Bosqué, Camille. "What are you printing? Ambivalent emancipation by 3D printing." Rapid Prototyping Journal 21, no. 5 (August 17, 2015): 572–81. http://dx.doi.org/10.1108/rpj-09-2014-0128.
Full textAbstract:
Purpose – The purposes of this paper are to study how entry-level 3D printers are currently being used in several shared machine shops (FabLabs, hackerspaces, etc.) and to examine the ambivalent emancipation often offered by 3D printing, when users prefer the fascinated passivity of replicating rather than the action of repairing. Based on a field study and on a large online survey, this paper offers to examine different practices with entry-level 3D printers, observed in several shared machine shops (FabLabs, hackerspaces, etc.). The recent evolution of additive manufacturing and the shift from high-end additive technologies to consumer’s entry-level 3D printing is taken as an entry point. Indeed, digital fabrication has recently received extensive media coverage and the maker movement has become a trendy subject for numerous influential publications. In the makerspaces that were taken for this field survey, 3D printers were very often used for demonstration, provoking fascination and encouraging a passive attitude. Design/methodology/approach – As part of the work for a PhD research on personal digital fabrication as practiced in FabLabs, hackerspaces and makerspaces, since 2012, a large-scale field survey at the heart of these workshops was carried out. Particular attention has been paid to the relationships established between the inhabitants of these places and their machines, observing the logic of developing projects and the reactions or techniques used to counter unforeseen obstacles – that shall be demonstrated to be an essential occurrence for these moments of production. From Paris to Amsterdam, Barcelona, Rome, Lyngen (Norway), San Francisco, New York, Boston, Tokyo, Kamakura (Japan) to Dakar, a means of observing at the heart of more than 30 makerspaces (FabLabs, hackerspaces) has been created, with the aim of looking beyond the speeches relayed by the media and to constitute an observatory of these places. The field observations are confirmed by a quantitative study, based on a survey submitted online to 170 users, coming from 30 different makerspaces in more than ten countries in the world and reached through social networks or mailing lists. This survey offers a rigorous insight on the uses of 3D printing and leads to the consideration of the types of attention applied to 3D printing and the part played by the “default” or “trivial” productions used for their demonstrations or performances. Findings – Based on both the observations and the quantitative survey, it can be discussed how the question of so-called “user-friendliness” is challenged by practices of repairing, fixing and adjusting, more than that of replicating. Indeed, it is claimed that this offers a possible meaning for 3D printing practices. In the description and analysis of the behaviours with 3D printers, this leads to privilege the idea of “disengaging” and the notion of “acting” rather than simply passively using. Originality/value – 3D printing is just one of the many options in the wide range available for personal digital fabrication. As a part of the same arsenal as laser cutters or numerical milling machines, 3D printing shares with these machines the possibility of creating objects from designs or models produced by a computer. These machines execute the instructions of operators whose practices – or behaviours – have yet to be qualified. These emerging technical situations pose a series of questions: who are those who use these 3D printers? What are they printing? What are the techniques, the gestures or the rituals imposed or offered by these machines?
44
Dorweiler, Bernhard, Pia Elisabeth Baqué, Rayan Chaban, Ahmed Ghazy, and Oroa Salem. "Quality Control in 3D Printing: Accuracy Analysis of 3D-Printed Models of Patient-Specific Anatomy." Materials 14, no. 4 (February 21, 2021): 1021. http://dx.doi.org/10.3390/ma14041021.
Full textAbstract:
As comparative data on the precision of 3D-printed anatomical models are sparse, the aim of this study was to evaluate the accuracy of 3D-printed models of vascular anatomy generated by two commonly used printing technologies. Thirty-five 3D models of large (aortic, wall thickness of 2 mm, n = 30) and small (coronary, wall thickness of 1.25 mm, n = 5) vessels printed with fused deposition modeling (FDM) (rigid, n = 20) and PolyJet (flexible, n = 15) technology were subjected to high-resolution CT scans. From the resulting DICOM (Digital Imaging and Communications in Medicine) dataset, an STL file was generated and wall thickness as well as surface congruency were compared with the original STL file using dedicated 3D engineering software. The mean wall thickness for the large-scale aortic models was 2.11 µm (+5%), and 1.26 µm (+0.8%) for the coronary models, resulting in an overall mean wall thickness of +5% for all 35 3D models when compared to the original STL file. The mean surface deviation was found to be +120 µm for all models, with +100 µm for the aortic and +180 µm for the coronary 3D models, respectively. Both printing technologies were found to conform with the currently set standards of accuracy (<1 mm), demonstrating that accurate 3D models of large and small vessel anatomy can be generated by both FDM and PolyJet printing technology using rigid and flexible polymers.
45
Brousek, Josef, Tomas Petr, and Radomir Mendricky. "Displacement Analysis of Large-Scale Robotic Arm for Printing Cement Mortar Using Photogrammetry." Machines 11, no. 1 (December 29, 2022): 37. http://dx.doi.org/10.3390/machines11010037.
Full textAbstract:
The development of specialised equipment for three-dimensional printing of cement mortar requires the deployment of advanced design methods. The accuracy of printing robotic arms is influenced by the change in the position of the end effector, which is influenced by the stiffness of the arm, or deformation of parts of the arm and yielding in the place of rotation axes. Determining the actual change in the end effector position is often a difficult challenge. In this paper, we analysed the displacement on a large robotic arm by the non-contact optical photogrammetry method. We applied this method to a specialised 2.8 m long robotic arm SCARA with an added rotational axis. We compared the results from photogrammetry with the results from measurements with a mechanical deflection meter, and with the predicted displacement values from the FEM simulation. The results from both measurement methods showed maximum deviations of hundredths of a mm. The findings of the analysis thus indicate that photogrammetry meets the strict requirements for displacement measurement on a robotic arm for the 3D printing of cement mortar. A significant advantage of the method is the possibility of measuring almost all attainable arm positions and achieving results in hundreds of places.
46
Zhang, Fengqiang, Changhai Li, Zhenlong Wang, Jia Zhang, and Yukui Wang. "Multimaterial 3D Printing for Arbitrary Distribution with Nanoscale Resolution." Nanomaterials 9, no. 8 (August 2, 2019): 1108. http://dx.doi.org/10.3390/nano9081108.
Full textAbstract:
At the core of additive manufacturing (3D printing) is the ability to rapidly print with multiple materials for arbitrary distribution with high resolution, which can remove challenges and limits of traditional assembly and enable us to make increasingly complex objects, especially exciting meta-materials. Here we demonstrate a simple and effective strategy to achieve nano-resolution printing of multiple materials for arbitrary distribution via layer-by-layer deposition on a special deposition surface. The established physical model reveals that complex distribution on a section can be achieved by vertical deformation of simple lamination of multiple materials. The deformation is controlled by a special surface of the mold and a contour-by-contour (instead of point-by-point) printing mode is revealed in the actual process. A large-scale concentric ring array with a minimum feature size below 50 nm is printed within less than two hours, verifying the capacity of high-throughput, high-resolution and rapidity of printing. The proposed printing method opens the way towards the programming of internal compositions of object (such as functional microdevices with multiple materials).
47
Tahmasebinia, Faham, Marjo Niemelä, Sanee Ebrahimzadeh Sepasgozar, Tin Lai, Winson Su, Kakarla Reddy, Sara Shirowzhan, Samad Sepasgozar, and Fernando Marroquin. "Three-Dimensional Printing Using Recycled High-Density Polyethylene: Technological Challenges and Future Directions for Construction." Buildings 8, no. 11 (November 21, 2018): 165. http://dx.doi.org/10.3390/buildings8110165.
Full textAbstract:
Three-dimensional (3D) printing technologies are transforming the design and manufacture of components and products across many disciplines, but their application in the construction industry is still limited. Material deposition processes can achieve infinite geometries. They have advanced from rapid prototyping and model-scale markets to applications in the fabrication of functional products, large objects, and the construction of full-scale buildings. Many international projects have been realised in recent years, and the construction industry is beginning to make use of such dynamic technologies. Advantages of integrating 3D printing with house construction are significant. They include the capacity for mass customisation of designs and parameters to meet functional and aesthetic purposes, the reduction in construction waste from highly precise placement of materials, and the use of recycled waste products in layer deposition materials. With the ultimate goal of improving construction efficiency and decreasing building costs, the researchers applied Strand 7 Finite Element Analysis software to a numerical model designed for 3D printing a cement mix that incorporates the recycled waste product high-density polyethylene (HDPE). The result: construction of an arched, truss-like roof was found to be structurally feasible in the absence of steel reinforcements, and lab-sized prototypes were manufactured according to the numerical model with 3D printing technology. 3D printing technologies can now be customised to building construction. This paper discusses the applications, advantages, limitations, and future directions of this innovative and viable solution to affordable housing construction.
48
Patsoukis Dimou, Alexandros, Hannah P. Menke, and Julien Maes. "Benchmarking the Viability of 3D Printed Micromodels for Single Phase Flow Using Particle Image Velocimetry and Direct Numerical Simulations." Transport in Porous Media 141, no. 2 (December 3, 2021): 279–94. http://dx.doi.org/10.1007/s11242-021-01718-8.
Full textAbstract:
AbstractHolistic understanding of multiphase reactive flow mechanisms such as CO2 dissolution, multiphase displacement, and snap-off events is vital for optimisation of large-scale industrial operations like CO2 sequestration, enhanced oil recovery, and geothermal energy. Recent advances in three-dimensional (3D) printing allow for cheap and fast manufacturing of complex porosity models, which enable investigation of specific flow processes in a repeatable manner as well as sensitivity analysis for small geometry alterations. However, there are concerns regarding dimensional fidelity, shape conformity and surface quality, and therefore, the printing quality and printer limitations must be benchmarked. We present an experimental investigation into the ability of 3D printing to generate custom-designed micromodels accurately and repeatably down to a minimum pore-throat size of 140 μm, which is representative of the average pore-throat size in coarse sandstones. Homogeneous and heterogeneous micromodel geometries are designed, then the 3D printing process is optimised to achieve repeatable experiments with single-phase fluid flow. Finally, Particle Image Velocimetry is used to compare the velocity map obtained from flow experiments in 3D printed micromodels with the map generated with direct numerical simulation (OpenFOAM software) and an accurate match is obtained. This work indicates that 3D printed micromodels can be used to accurately investigate pore-scale processes present in CO2 sequestration, enhanced oil recovery and geothermal energy applications more cheaply than traditional micromodel methods.
49
Sameni, Farzaneh, Basar Ozkan, Sarah Karmel, Daniel S. Engstrøm, and Ehsan Sabet. "Large Scale Vat-Photopolymerization of Investment Casting Master Patterns: The Total Solution." Polymers 14, no. 21 (October 29, 2022): 4593. http://dx.doi.org/10.3390/polym14214593.
Full textAbstract:
The material properties and processing of investment casting patterns manufactured using conventional wax injection Molding and those manufactured by vat photopolymerization can be substantially different in terms of thermal expansion and mechanical properties, which can generate problems with dimensional accuracy and stability before and during ceramic shelling and shell failures during the burn-out of the 3D printed casting patterns. In this paper and for the first time, the monofunctional Acryloyl morpholine monomer was used for 3D printing of casting patterns, due to its thermoplastic-like behavior, e.g., softening by heat. However, the hydrophilic behavior of this polymer led to an incorporation of up to 60 wt% of Hexanediol diacrylate, to control the water absorption of the network, which to some extent, compromised the softening feature of Acryloyl morpholine. Addition of a powdered wax filler resulted in a delayed thermal decomposition of the polymer network, however, it helped to reduce the thermal expansion of the parts. The dimensional accuracy and stability of the wax-filled formulation indicated an excellent dimensional tolerance of less than ±130 µm. Finally, the 3D printed patterns successfully went through a burn out process with no damages to the ceramic shell.
50
Vairagade, Suraj, Narendra Kumar, RaviPratap Singh, and Mohit Tyagi. "Automated Construction of Structures using 3D Printing: A Review." Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, no. 1 (December 19, 2022): 1871–80. http://dx.doi.org/10.38208/acp.v1.732.
Full textAbstract:
The recent advances in 3D printing techniques from past one decade in terms of materials development, product evolvement methods, industry 4.0, technological up-gradations, manpower free constructions, customised production, waste minimization, freedom from designs at an affordable cost. 3D printing processes are extensively contributing in the field of structural industry. To meet the fast-growing demand of the humans there is a need to understand the concepts and in-depth knowhow of 3D printing processes. The technological developments of 3DP to infrastructure domain are still untouched zone worldwide. It is because of lesser projects successfully carried out since its inception. The article presents insights of additive manufacturing processes and its applicability to the construction industry. In the construction industry, 3D printing has not yet reached the point of commercial availability at global level. Fewer number of 3DP experiments for large-scale buildings can be discovered in the literature. A critical analysis of past and present literature studies is conducted worldwide and also investigated the potential benefits of additive manufacturing processes to construction industry. This article's unique contribution is its examination of the many uses for 3D printing in the construction industry, as well as the advances in technology that have made this possible.