Journal articles: 'Molding (forming)'

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Czerwinski, Frank. "Selected Aspects of Semisolid Forming Magnesium Alloys." Materials Science Forum 539-543 (March 2007): 1644–49. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1644.

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The conventional and novel routes of injection molding magnesium alloys are described, including thixo- and rheomolding, semisolid extrusion molding, near-liquidus molding, composite molding and alloy generation by mixing thixotropic slurries. For each technique the basic concepts along with their experimental verifications are explained. The examples show the universal nature of the injection molding and its capability of implementing a variety of modern processing methods.

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Wu, Li Ying. "Study on Form Process of Resin Composite Material and Graphic Artist Designer." Applied Mechanics and Materials 608-609 (October 2014): 41–45. http://dx.doi.org/10.4028/www.scientific.net/amm.608-609.41.

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The paper analyze development process of the advanced resin matrix composite materials forming technology, that is low pressure molding, pultrusion process, molding, filament winding forming process, placement molding process, molding process of RTM, and analyze the key technology in the development process, to study the evolvement of advanced composite material molding process, so as to explore the future development direction of forming resin based composite material technology.

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Yu, Bei, and He Qing Wang. "Research on Injection Products Molding Defects Warping Based on Moldflow." Applied Mechanics and Materials 365-366 (August 2013): 141–44. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.141.

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The molding quality of plastic injection products are affected by such factors as mold structure and molding technology in the forming process. If the products have any quality problem, every forming process will have to be reviewed, which will intangibly lead to an increase in workload for mold-related staff and in the costs of production. Based on an example of molding defects warping in the practical production of a PBT plastic injection product, this essay analyzes the molding defects by using Moldflow software, with the aim of optimizing molding scheme and the molding quality of injection products and finally improving the social and economic benefits.

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Jing, Guan. "Analysis of Influence of Fine Aggregate on Void Ratio of Asphalt Mixture." Applied Mechanics and Materials 587-589 (July 2014): 1079–83. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.1079.

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Using molding with different fine aggregate, gradation, asphalt, aggregate forming and forming method, and calculate the sample porosity. The test results show that: The basalt coarse-fine aggregate molding, specimen void ratio was larger, are beyond the regulatory requirements; basalt coarse aggregate molding and limestone fine aggregate molding, specimen porosity is small, can meet the requirements of specification range. The main reason is that the basalt thin bulk density is big, and its not easy compaction.

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Yang, Jie, Yang Guan, Dongdong Gu, Yuzhong Zhang, Zheng Zhang, and Jinfa Shi. "Effect of a stranded hole type on the performance of corn stover composite pipe." PLOS ONE 19, no. 4 (April 10, 2024): e0301590. http://dx.doi.org/10.1371/journal.pone.0301590.

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To promote the comprehensive utilization of corn stover and the development of field water-saving irrigation technology, a method of returning corn stover to the field was prosed; in this method, the crop stalks were crushed, mixed with soil in different proportions of adulteration, and then extruded to form hollow round tubes. To compare the influence of the winch blade with or without a diameter change on the composite pipe molding performance, two composite pipe molding devices were theoretically designed, simulated, and analyzed using discrete element simulation software, and a composite pipe molding bench test was performed. The simulation test revealed that the composite pipe molding rate of the winch blade without the reducer molding device was 3.45 kg/s, the output power of the winch shaft was 20.7 kW, the composite pipe molding rate of the winch blade with the reducer molding device was 1.20 kg/s, and the output power of the winch shaft was 18.75 kW. By calculating the weighted average of two indices, the composite pipe forming rate and the winch shaft output power, the comprehensive performance index of the composite pipe forming device without a reducer was greater than that of the device with a reducer. The composite pipe forming bench test revealed two kinds of molding devices with an extrusion molding with an outer diameter of 100 mm and an inner diameter of 30 mm. The composite pipe density test average was greater than 1.30 g/cm3 and met the requirements of composite pipe molding; the winch blade without a reducer molding device had an average composite pipe molding rate of 3.23 kg/s, and the winch blade with an average reducer molding rate of 2.07 kg/s. The forming rate of the composite pipe without a reducer was faster. Therefore, a winch blade without a reducer composite pipe molding device is more conducive to improving the composite pipe molding performance.

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Chaisrichawla, Suradej, and Rapeephun Dangtungee. "The Usage of Recycled Material in Rotational Molding Process for Production of Septic Tank." Materials Science Forum 936 (October 2018): 151–58. http://dx.doi.org/10.4028/www.scientific.net/msf.936.151.

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Rotational molding is the forming process that use in produce large product, complexity product and hollow product with the limitation of process ability and material. Most of the rotational molding is a large product with a longer useful life compare to other technique, so to reused the material from other process can help to increase the competition of rotational molding in the market. This paper chooses recycled HDPE from blowing process due to it generally used by the market and not difficult to find. So in this paper choose to studies the blend of virgin LLDPE (linear low density polyethylene) and recycled HDPE (high density polyethylene) for application in septic tank by rotational molding process. Various ratio of blending were investigated to find the morphology, mechanical properties and the relation of melt flow rate and rheology. Mechanical properties are generally referred to tensile test, hardness test, impact strength and Morphology by Scanning Electron Microscope. Many studies have carried out to investigate about rotational molding forming process control, mold and process condition, some on material ability and new material to used in rotational molding to improve the mechanical properties and various technique in forming by rotational molding. But this article will investigated more about the use of recycled material from other forming technique process (which refer to blowing process in this article) to use in rotational molding process for produce septic tank compare to the commercial quality.

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Chen, Yuan-Yang, and Yung-Jin Weng. "A Novel Continuous Roll-Forming Process of Elastomer Molds." Processes 11, no. 3 (March 18, 2023): 931. http://dx.doi.org/10.3390/pr11030931.

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This study proposed a novel continuous roll-forming process of elastomer molds, which can control the deformation of the mold using the rolling belt stack combination method. This study analyzed various rolling belt combinations, assembled the system based on simulation and experimental data according to the deformation requirement design, and obtained a controllable microstructure mold rolling belt with tensile deformation. Mold thickness and microstructure size are key microstructure mold deformation parameters. This study designed and assembled a controllable microstructure mold rolling belt-type imprint molding system and conducted a series of experiments. The impact and application of different experimental system operation procedures and fabrication methods of the auxetic structure rolling belt on replication molding were analyzed. The innovative controllable microstructure mold rolling belt-type imprint replication molding technique proposed in this study had a stable and controllable mold deformation mechanism. It can control and replicate molding.

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Li, Zhen, Li Xia Xu, Chun Lan Lu, Guo Zhu Liu, and Xin Yue Li. "Internal Structure Changes of Nylon 12 in Balloon Forming Process." Applied Mechanics and Materials 528 (February 2014): 153–61. http://dx.doi.org/10.4028/www.scientific.net/amm.528.153.

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Medical balloon has been widely used for the treatment of cardiovascular and cerebrovascular diseases, but the theoretical studies in processing process of medical balloon have reported less in the domestic. This paper briefly introduce in the processing process of medical balloon from the nylon 12 as raw materials, through control the conditions of primary molding, secondary molding and final molding process of the operating, then investigate the stress-strain curve of each sample in the molding process by Hydraulic Pressure Tester. And further investigated the material's lattice parameter, melting point, crystallinity and the structure changes of internal groups during the molding process separately by X-ray diffraction (XRD), differential scanning caborimetry (DSC) and infrared transmission spectroscopy (FTIR) experiment. It could be founded that the acting force between the polymeric chain of nylon 12 reduced at first, so that the material has better plasticity and machinability for forming, and then the acting force of polymer chain is enhanced, so that the final balloon has higher strength and stability were discovered during the balloon forming process.

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Hu, Hai Ming, De Bao Yin, and Hui Li. "Forming Process of Segment-Narrow-Bars on the PCR Mold." Key Engineering Materials 561 (July 2013): 270–73. http://dx.doi.org/10.4028/www.scientific.net/kem.561.270.

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The narrow bars on tire mold segment are used for molding the sipes on the tread, Its size is small.Its shape and location is diverse and process is complex. This article, through processing feasibility analysis of the narrow bars, combined with production practice, conducted a systematic and detailed explanations on the process of molding the narrow bars in the precision casting method for molding segment.Through analyse a number of empirical conclusions about narrow bars’ forming process which have drawn, and has proved the practicality of these methods through practice.

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Yanjun, Xiao, Liu Rui, Song Haiping, Jing Ran, and Zhu Jiayu. "The Characteristics of Perlite Sound Absorption Board Formed By Vibration Molding." Open Materials Science Journal 9, no. 1 (June 26, 2015): 39–42. http://dx.doi.org/10.2174/1874088x01509010039.

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This paper puts forward a scheme to form perlite sound absorption boards by vibration molding according to the material properties and the characteristics of vibration forming method. In the trial, the feasibility and reliability of this method were confirmed by studying the effect of working pressure, frequency and vibration force on the quality of the perlite sound absorption board. Besides, a series of recommended parameters for better forming was proposed. Through the discussion on the characteristics of the perlite sound absorption board after vibration molding, it is verified that different molding methods have a great influence on the quality and performance of the perlite sound absorption board. In addition, the conclusion which provides a basis for further research on forming method of similar boards shows that the density of the finished products formed by vibration molding method is more uniform.

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Wu, Chang Ming, Yan Yang, Hui Min Sun, Da Deng, Mei Hua Chen, Jie Guang Song, Lin Chen, Ming Han Xu, and Cheng Wei Hao. "Effect of Molding Processing on Properties of YAG Porous Ceramics via Dry Pressing Molding Method." Materials Science Forum 934 (October 2018): 134–39. http://dx.doi.org/10.4028/www.scientific.net/msf.934.134.

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YAG materials have a number of unique properties, the application is very extensive. In order to improving the properties of YAG porous materials, the effect of forming processing on the properties of YAG porous ceramics is investigated. Through the results and analysis, the conclusions showed that the porosity of YAG porous ceramics gradually decreased with the molding pressure increases, and the compressive strength of YAG porous ceramics shows a rising trend. The size and number of pores in the microstructure are reduced with increasing the forming pressure, there are inherently many voids in the YAG porous ceramics body at low forming pressures. The porosity of YAG porous ceramic decreases with the increase of dwell time, however, the process of extending from 5 min to 10 min is much faster than the rate of descending from 10 min to 15 min. The size and number of pores in the microstructure are reduced with extending the holding pressure time, which also makes YAG porous ceramics pose the higher mechanical strength. Through the analysis of the results, when the forming pressure is 10MPa, the porosity of YAG porous ceramics is 41.11% and the compressive strength is 5.8MPa, the porosity and compressive strength of YAG porous ceramics is better.

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Narowski, Przemysław, and Krzysztof Wilczyński. "A Global Approach to Modeling Injection Molding." Polymers 16, no. 1 (January 3, 2024): 147. http://dx.doi.org/10.3390/polym16010147.

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A problem of modeling plastic injection forming (molding) is presented, including both the plasticizing system of the injection-forming machine and the mold. When modeling the plastic flow in the mold, the input quantities are essentially unknown, e.g., the plastic melt temperature. Thus, a comprehensive (global) model of the injection-forming process is needed for the flow in the plasticizing system and in the mold. The process output quantities from the plasticizing system will be the input quantities for the mold. When modeling the plastic flow in the injection-forming machine, a comprehensive approach should be applied to consider the solid material conveying, material plasticizing, and the material melt flow. The model of material plasticizing is a basis for building such global models. In this research, the effect of the flow (including plasticizing) in the injection-forming machine on the flow in the mold is studied by simulation (using Moldex3D 2023R3OR 64-bit software) and experimentation. These studies are carried out for the injection forming of selected material using a specialized spiral mold. Simulations performed with the use of Moldex3D software for the plasticizing system significantly improved the accuracy of the simulation of the flow in the mold. However, the best results were obtained using experimental data (plastic melt temperature) as input quantities for mold filling simulations. The novel concepts of injection-forming process modeling based on our previous experimentations are also discussed.

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Zhou, Tianfeng, Jiwang Yan, Sergey Bolotov, and Tsunemoto Kuriyagawa. "3414 Improvement of the Forming Ability in Microgroove Molding by Ultrasonic Vibration." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2011.6 (2011): _3414–1_—_3414–6_. http://dx.doi.org/10.1299/jsmelem.2011.6._3414-1_.

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14

Zhang, Li Min. "Study of Material Forming Comprehensive Evaluation Method Based on Fuzzy Technology." Applied Mechanics and Materials 484-485 (January 2014): 7–11. http://dx.doi.org/10.4028/www.scientific.net/amm.484-485.7.

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In order to evaluate the feasibility of resin composite process, firstly analysis of the properties of the composite and the RTM molding, autoclave molding process. This paper presents the content of the evaluation: the evaluation index system was established according to the evaluation content. Through the analysis of product features, composite material forming method, manufacturing resources, to product manufacturability, cost of production, production cycle, taking hierarchical method to construct a fuzzy tree based on hierarchical multi objective evaluation system model. Using 1~9 ratio method for the membership of specific indicators under this model, discussed the problem of weight distribution, and verifies the feasibility of this method by the example analysis, to realize the optimization of composite material molding method.

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Tikhlivets, Svitlana, Olena Hrytsay, and Valentyna Filenko. "Mineral composition of the processed forming mixture of the Kryvyi Rih Mechanical Repair Plant." IOP Conference Series: Earth and Environmental Science 1348, no. 1 (May 1, 2024): 012020. http://dx.doi.org/10.1088/1755-1315/1348/1/012020.

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Abstract Currently, Ukraine and developed countries have developed and are constantly updating national waste management programs. Industrial waste as a raw material potential can replace primary sources of natural resources, significantly reduce resource consumption and help ensure the raw material independence of territories and individual countries. The spent molding compound of the Kryvyi Rih Mechanical Repair Plant is a multi-ton solid waste from foundry production. A part of the spent molding mixture is reused as a recyclable material, but the bulk of it is disposed of at municipal solid waste landfills. In this paper, the mineral composition of the spent molding compound is studied in detail, which reveals the possibilities of its reuse. Based on the results obtained, the mineral composition of the spent molding mixture was determined, and mineralogical recommendations were given for the technology of processing the spent mixture. Its involvement in reuse will make it possible to obtain conditioned reconstituted molding sands, free up part of the solid waste landfills, and reduce the negative technogenic load.

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Sun, Lu Yong, Jin Long Zou, and Kai Chen. "FEM-Based Research on Molding Parameter Analysis of the PET Beverage Bottle." Applied Mechanics and Materials 488-489 (January 2014): 121–24. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.121.

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The researched PET beverage bottle molding process was analyzed with the combination of stretch blow molding technological process of the manufacturing enterprise. The molding results would be influenced by some technological parameters. In order to study the effect of these factors on the forming properties and thickness distribution of molding bottle, the article builds the physical model and finite element model of PET bottles stretch blow molding process, and simulates stretch blow molding process by using POLYFLOW software for analyzing the thickness distribution of molding bottle. Comparing different thickness distribution under the different condition of stretch speed, pre-blowing pressure, and blowing pressure, the technological parameters were optimized, so as to achieve the goal of optimization of molding bottle.

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Arrasmith, Steven R., Syamal K. Ghosh, Dilip K. Chatterjee, and James S. Reed. "Incipient flocculation molding: A new ceramic forming technique." Ferroelectrics 231, no. 1 (June 1999): 273–78. http://dx.doi.org/10.1080/00150199908014543.

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Zheng, Chao, Yi Sheng Zhang, and De Qun Li. "PVC Sheet Blow Forming Finite Element Simulation and Experimental Study." Key Engineering Materials 467-469 (February 2011): 1846–51. http://dx.doi.org/10.4028/www.scientific.net/kem.467-469.1846.

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The plastic sheet forming technique is simple and easy to realize, that is why, it is widely used for packaging commodities. Similarly, in In-Mold-Decoration (IMD) molding technology, due to the complex geometry of the membrane and the high requirement of the dimensional accuracy, geometric design and molding technique for the product should be focused on controlling the thickness distribution of shell or membrance plastic products in order to achieve high precision manufacturing. This paper started with analyzing the performance data of the plastic sheet molding material, using nonlinear finite element method and multi-physics coupling method to simulate the plastic sheet forming process, and the result gives the required parameters for product design and quality control. For the thickness deviation, the experimental testing shows that the maximum discrepancy between the simulation and actual result is less than15%. The research proved that computer simulation can contribute to control the inhomogeneity of the shell or membrane so as to improve the design and the quality of manufacturing.

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Jiang, Shao Fei, and Cong Da Lu. "Review of Gas-Assisted Injection Molding Process." Advanced Materials Research 69-70 (May 2009): 645–48. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.645.

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The forming mechanism and optimization of the gas-assisted injection molding (GAIM) process have been studied for several years, both at home and abroad. Some researches and experiments about GAIM is summarized in this paper. The GAIM's forming mechanism focuses on research of the filling, gas-assisted filling and gas-assisted packing and cooling stages. While the optimization of the GAIM process pays much more attention to one of the parameters affecting the molding quality.

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Saukani, Imam, Herwandi, Sugeng Hadi Susilo, Agus Sukoco Heru Sumarno, Sidik Nurcahyo, and Doddy Maulana. "Desain Implementasi Rangkaian Kontrol Motor Penggerak Pisau untuk Peningkatan Produksi Onthok Yuyu." Elposys: Jurnal Sistem Kelistrikan 11, no. 1 (February 29, 2024): 74–79. http://dx.doi.org/10.33795/elposys.v11i1.4497.

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Onthok yuyu is a traditional cake included in the dry cake category and is made from sticky rice flour. Onthok yuyu is also known as Onthok worm, this is because the shape of the cake resembles a mound dug up by worms or yuyu (Javanese: crab). The traditional Onthok yuyu cake outside Java is more often known as coconut root cake, because its shape resembles the roots of a coconut tree piled up on the ground. The forming process is carried out before the dry cake processing process, usually the raw material is flour mixed with liquid (water, butter) etc. to become a dough. Forming is done on the dough, then processing is carried out by frying or baking. The process of forming or molding food products on an industrial scale can be done using extrusion or molding processes. If an elongated product is desired, the forming process is extrusion, namely using an extruder machine by installing output holes whose shape and size are adjusted to the cross-section of the desired food product. If a certain shape is desired, the dough is extruded and then continued with forming or molding. Basically, molding can be done carried out by two methods. Efforts to empower Micro, Small and Medium Enterprises (MSMEs) require an empowerment model that includes improving existing MSMEs so that they are more advanced so they can strictly competent in free market competition.

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He, Jian Yun, Yuan Yu, Ruo Yun Wang, Le Chang, Qiang Wang, Li Cheng He, and Wei Min Yang. "Research on the Micro-Injection of UV Curing." Applied Mechanics and Materials 602-605 (August 2014): 455–57. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.455.

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Based on the traditional injection molding technology, micro-injection molding of UV curing experiments has been conducted. The injection molding and repeatability of the parts which have micro-structure were mainly studied. The experimental results show that: the mold-ability and repeatability of micro-structure are significantly infected by UV radiation energy and forming temperature. In order to achieve a good repeatability, it is necessary to use a sufficiently high intensity ultraviolet radiation and appropriate molding temperature during micro-injection of UV curing.

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Kuang, Wei Hua, and Ju Liang Liu. "Forming Process and Technology Research of Mobile Telephone Frame." Applied Mechanics and Materials 20-23 (January 2010): 1401–4. http://dx.doi.org/10.4028/www.scientific.net/amm.20-23.1401.

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Injection molding is widely used to produce a variety of parts, from the smallest component to entire body panels of cars. It has some advantages, including high production rates, repeatable high tolerances, ability to use a wide range of materials, low labour cost and minimal scrap loss. As a case, the paper introduced the application of MoldFlow software in injection molding development of the mobile telephone frame. Best gate location was obtained. The numerical simulation provided scientific and valuable injection process information. At last, a multi-cavity injection mold for mobile telephone frame was designed, and the NC machining of the mold core was programmed by UG NX software.

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He, Jian Yun, Yuan Yu, Ruo Yun Wang, Xia Tang, Qiang Wang, Li Chen He, and Wei Min Yang. "Research on the UV-Curing Injection Molding." Applied Mechanics and Materials 651-653 (September 2014): 177–80. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.177.

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Based on the combination of UV curing and injection molding, a new concept named "chemical manufacturing" is proposed in this paper. A cylinder with a diameter of 6mm and a height of 10mm was used as the molding sample;A single factor analysis was used to determine the effects of the intensity of ultraviolet, the duration of ultraviolet irradiation and the distance between UVLED device and product surface on the formability of UV-curing injection molding. The experimental results showed that the intensity of UV radiation, the UV irradiation duration and the distance between UVLED device and product surface have a significant effect on the UV-curing molding of the product. With the increase of ultraviolet radiation intensity and UV irradiation duration, the forming quality of the products increases, while with the increase of the distance between UVLED device and product surface the forming quality of products declines.

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Deringer, Tim, and Dietmar Drummer. "The influence of mold temperature on thermoset in-mold forming." Journal of Polymer Engineering 40, no. 3 (February 25, 2020): 256–66. http://dx.doi.org/10.1515/polyeng-2019-0322.

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AbstractA new process, called thermoset in-mold forming, for combining thermoset master forming and thermoset forming in one mold is in development. A pre-impregnated continuous-fiber reinforced sheet based on epoxy (prepreg) is formed in the injection molding machine, followed by instantaneous overmolding of a short-fiber reinforced epoxy compound in one step. Compared with conventional processes in which thermoset injection molding, prepreg compression molding, and hence curing of the materials are separated, the new process allows for the combination in one step and simultaneous curing of both components. The result is a hybrid component, which features a continuous-fiber reinforced part for higher mechanical performance and a short-fiber reinforced part with high design freedom for integration of additional functions. For a successful combination of both materials in one process, it is essential to investigate the bond strength between them in relation to the processing parameters and their influence on the degree of cure. This paper analyzes the influence of the mold temperature in this process on curing degree, bond strength, and the processing viscosity.

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Filenko, V., O. Hrytsai, and S. Tikhlivets. "Component composition of the processed forming mixture and mineralogical recommendations for its re-use." IOP Conference Series: Earth and Environmental Science 1254, no. 1 (October 1, 2023): 012054. http://dx.doi.org/10.1088/1755-1315/1254/1/012054.

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Abstract Modern industrial production is aimed at the development of waste-free technological processes, wider use in the production of waste and by-products. The largest amount of waste is generated from the activities of mining and metallurgical enterprises. One of the problems of foundry production is the disposal of multiton solid waste, about 90% of which is spent molding mixture. Part of the spent mixture is reused as recyclable, but the main mass of it is collected at municipal solid waste landfills. This work is devoted to the study of the component composition of foundry production waste – spent molding mixture with the aim of its reuse. According to the results of the research carried out by the authors, mineralogical recommendations regarding its reuse were provided. Involvement in the reuse of spent molding mixture will allow to free up part of the solid household waste landfills, reduce the negative man-made load on the environment, and additionally obtain conditioned restored molding sands.

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Liu, Yun Ling. "Research on Modeling Design in Composite Molding." Applied Mechanics and Materials 608-609 (October 2014): 36–40. http://dx.doi.org/10.4028/www.scientific.net/amm.608-609.36.

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According to the design of composite mould manufacturing technology, the paper discusses the present situation and development trends of domestic and international research, focuses on the analysis of forming processes for composite materials, composite molding technology. At the same time, this paper presents a design method of composite technology of INVAR steel mold structure based on multi point forming of RTM technology, this method can well solve the design and manufacturing of composite mold problems.

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Gavariev, R. V., E. N. Soldatkina, and K. N. Gavarieva. "Coatings and Lubricant to Forming Surfaces of Molds for Casting under Pressure." Solid State Phenomena 316 (April 2021): 789–93. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.789.

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The article considers the main points for choosing lubricants, taking into account the specifics of the injection molding process. The main drawbacks of modern lubricant compositions are identified, and based on them, the main requirements for lubricants for injection molding are determined. The most critical parameters of lubricants are specified, depending on the melt to be filled. The methods of applying lubricants are considered, and the most optimal ones are selected.

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Qin, Jian Hua, Chun Hui Liu, Wen Feng Gao, and Chuan Hao Yu. "Analysis of Melting Process and Numerical Simulation of Pure UHMW-PE Pipe Based on Molding in Barrel Technology." Advanced Materials Research 87-88 (December 2009): 250–55. http://dx.doi.org/10.4028/www.scientific.net/amr.87-88.250.

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Ultra High Molecular Weight Polyethylene(UHMW-PE) pipe is a kind of pipe of thermoplastic engineering plastic with excellent comprehensive performance, but the difficulty in molding is a technical bottleneck which has already affected the extensive application of pipe of pure UHMW-PE. Molding in barrel on the Single screw extruder is a new technology of extrusion molding method, which can continuously carry out pipe of pure UHMW-PE, the most significant advantages of the technology are as follows: under the circumstances of no need to feed any additives in the whole forming process, it can continuously carry out pipe of pure UHMW-PE, and the extrusion molding speed of it is up to 12 m/h above. During the process of it based on molding in barrel technology, one of the main factors influencing to whether UHMW-PE pipe can be successfully molded or not is whether the melting process of raw material is adequate and appropriate or not. This article will elaborate melting characteristics of raw material of UHMW-PE, establishment of mathematical model of melting process, and numerical simulation of melting process, which belong to the forming process of molding in barrel, and will provide a theoretical basis for correctly designing the structure of single screw extruder and temperature control system of single-screw extruder, based on Molding in Barrel Technology.

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Zhou, Tian Feng, Ji Wang Yan, and Tsunemoto Kuriyagawa. "Comparing Microgroove Array Forming with Micropyramid Array Forming in the Glass Molding Press." Key Engineering Materials 447-448 (September 2010): 361–65. http://dx.doi.org/10.4028/www.scientific.net/kem.447-448.361.

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This paper presents a glass molding press (GMP) method to fabricate microgroove array and micropyramid array on the glass plate by replicating the shape of the mold to the glass surface. The differences between microgroove forming and micropyramid forming were investigated by experiments and finite element method (FEM) simulations. Microgroove arrays and micropyramid arrays were generated on the flat glass plate in the GMP process by using an electroless-plated Nickel Phosphorus (Ni-P) mold, on which the microstructures are fabricated by micro cutting. Furthermore, FEM simulations were used to trace the stress distribution and the strain distribution during the glass deformation, which illustrates the glass material flow in the microgrooves and the micropyramids on the mold during pressing. By comparing the processes between microgroove forming and micropyramid forming, the differences between them observed in the experiments were explained by the simulation results. Finally, some techniques to improve the forming accuracy were proposed.

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Yang, Li Yun, and Jia Min Zhang. "Influencing on the Wall Thickness of Deep Cavity Injection Molding Shell." Applied Mechanics and Materials 121-126 (October 2011): 1722–26. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1722.

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The quality question of deep cavity shell was the wall thickness, its influence factors, together with the product structure, die-structure, technology and other factors. The reasons of molding the wall with a thick beyond tolerance were discussed from products design, molding equipment and die, forming technology and material properties for a comprehensive analysis, and the corresponding resolution methods were presented.The methods of the adjustment of a cavity molding were introduced.

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Cheng, Fang Qi. "MPI-Based Injection Molding Process Optimization Analysis of the Control Plastic Cover." Advanced Materials Research 271-273 (July 2011): 1224–27. http://dx.doi.org/10.4028/www.scientific.net/amr.271-273.1224.

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To avoid the defects of plastic products and improve product quality have been an important problem for mold designers. In this paper, Autodesk Moldflow software are applied to a plastic control cover injection molding process simulation and find out the actual molding process and true conditions of the dynamic filling, pressure and cooling process in the process of forming. The forming process of parameters such as pressure, temperature and speed are given in order to improve the accuracy of the mould design and product precision.

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32

Park, Jeongyeon, Sungho Chang, Dongwon Lee, Hyeonhwa Lee, Bongchul Kang, and Jongsu Kim. "Two-Step Glass Molding Process for Forming Glass Edges with Obtuse Angles for Mobile Displays." Micromachines 13, no. 7 (June 29, 2022): 1032. http://dx.doi.org/10.3390/mi13071032.

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The domain of edge displays with 2.5D or 3D curved designs has been expanded to improve user convenience. The currently available 3D cover glass offers a limited curvature radius of at least 5 mm and a curvature less than 88°, due to limitations in the undercuts and formability of parts. The development of a full 3D cover, applicable to next-generation displays, requires cover glass molding technology with a curvature exceeding 90°. Here, a mold design and molding process, which addresses the current limitations by dividing the existing glass molding press (GMP) process into two stages, is proposed. The bending geometry of the glass prepared on the basis of the proposed mold design plan during single-step compression forming and two-step compression forming was predicted using commercial analysis software. A molding product with a curvature radius of 2.5 mm and an angle of curvature of 138.9° was produced when process conditions with bending by up to 180° with no damage were applied during actual forming experiments. Further research on annealing and cooling processes of GMP is expected to enable the design and process implementation to manufacture curved glass with a single curvature of at least 90° and multiple curvatures.

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33

Wang, Junxiao. "Recent Research and Prospect of 3D Printing Technology in the Preparation of New Ceramic Materials." Highlights in Science, Engineering and Technology 52 (July 4, 2023): 376–80. http://dx.doi.org/10.54097/hset.v52i.9849.

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3D printing, as a new generation of molding technology, has the advantages of simple operation, high molding efficiency and high precision, so that 3D printing molding functional ceramic components in medicine, aerospace and other fields have broad application prospects. This paper mainly introduces the forming process and materials of 3D printed ceramics, as well as the development and application status of 3D printed ceramics in functional ceramics and research status at home and abroad.

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34

Deringer, Tim, Christian Gröschel, and Dietmar Drummer. "Influence of mold temperature and process time on the degree of cure of epoxy-based materials for thermoset injection molding and prepreg compression molding." Journal of Polymer Engineering 38, no. 1 (January 26, 2018): 73–81. http://dx.doi.org/10.1515/polyeng-2016-0409.

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Abstract A new hybrid process for fiber-reinforced plastics based on thermosets combining master-forming and forming in one tool is currently undergoing development. The advantage of this technique is the integrated forming and overmolding of a thermoset-based continuous fiber-reinforced sheet in one step. Although both components are epoxy based, the resin formulations slightly differ and thus require individual curing parameters. For successful combination into one process, it is essential to investigate both components in relation to the processing parameters and their influence on the degree of cure. Besides the influence on the forming and filling behavior, the degree of cure also has an effect on the resulting mechanical properties. In this investigation, the influence of curing time and temperature on the degree of cure of epoxy-based materials was investigated with regard to identifying a process window for a process combination of master-forming and forming.

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35

Wang, Heng, Shukun Cao, Xiangwen Song, Hao Shen, Yi Cui, Zijian Cao, and shuqiang Xu. "Study on optimization experiment and characteristic test of biomass granule forming machine." MATEC Web of Conferences 175 (2018): 02025. http://dx.doi.org/10.1051/matecconf/201817502025.

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According to the biomass pellet fuel forming machine, problems such as high energy consumption, easy clogging, and low efficiency exist in the granulation process. In this paper, corn and wheat stalks are used as raw materials to study the effects of the size of the raw materials and the moisture content on the formation rate, particle average length, particle density, mechanical durability, and heating value of the particulate fuel. The influence of parameters such as spindle speed and die diameter on the productivity, molding rate, mechanical durability, and particle density of the molding machine was investigated. Compressor and ANSYS were used to study the compression characteristics and flow characteristics of corn stalk, and the characteristics of the pellets were determined. The results showed that the corn stalk with a grain size of 4 mm with a moisture content of 14% and wheat straw with a grain size of 4 mm with a moisture content of 15% had high molding rate, good particle density, and good mechanical durability.

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36

Xing, Lei, Xiang Dong Liu, and Wei Lu. "Numerical Simulation of Temperature Field of Biomass Briquetting Based on ANSYS." Advanced Materials Research 430-432 (January 2012): 824–27. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.824.

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According to the forming mechanism of biomass, straw lignin contained in the compression molding process will be softened by being squeezed and fractioned. The softened lignin binder plays a role in prompting the material forming. Using thermal analysis module of ANSYS simulation of the heating temperature within the epigenetic material distribution, this paper verifies temperature curing factors on the impact of biomass, deduces the biomass of the cross-section inferred lignin softening and melting conditions for the molding process, finally, it provides a basis to determine the parameters.

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37

Heaney, D. F., J. D. Gurosik, and C. Binet. "Isotropic forming of porous structures via metal injection molding." Journal of Materials Science 40, no. 4 (February 2005): 973–81. http://dx.doi.org/10.1007/s10853-005-6516-1.

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38

Cheng, Zhitong, Junwei Qi, Yuequan Wang, and Jianghai Jin. "Optimization of CF/PEKK molding process by orthogonal experiment." Journal of Physics: Conference Series 2566, no. 1 (August 1, 2023): 012123. http://dx.doi.org/10.1088/1742-6596/2566/1/012123.

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Abstract Composite materials have gradually entered people’s attention due to their advantages such as lightweight, high strength, corrosion resistance, fatigue resistance, and strong designability. Widely used in aviation, aerospace, automotive and other fields.[1-4].. The basic mechanical properties of the laminates were evaluated through short beam shear and bending tests. The optimum forming process was determined by orthogonal test: forming temperature 380°C, forming pressure 2 MPa, holding time 60 min, cooling rate 2°C/min. The interlaminar shear strength of this process was 103.42 MPa, and the bending strength was 1570 MPa

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Wang, Juan, Si Yu Lai, and Fan Xiao Li. "Molding Process and Development of Large Carbon Fiber of Fan Blades with Composite Properties of Materials." Advanced Materials Research 600 (November 2012): 157–60. http://dx.doi.org/10.4028/www.scientific.net/amr.600.157.

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The fiber reinforced materials, substrates, structural core materials, adhesives and auxiliary materials of wind turbine blade are discussed in this article. And the resin transfer molding (RTM) forming process, molding process and the latest Flex molding process are mainly summarized as well in the development of carbon fiber reinforced polymer (CFRP) application. Finally, the application and development of CFRP are analyzed in wind power field by combining research status of wind power both at home and abroad.

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40

Walczyk, Daniel F., and Yong-Tai Im. "A Hydraulically-Actuated Reconfigurable Tool for Flexible Fabrication: Implementation and Control." Journal of Manufacturing Science and Engineering 122, no. 3 (August 1, 1999): 562–68. http://dx.doi.org/10.1115/1.1286258.

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An automatically reconfigurable discrete tool (matrix of pins) has been developed and demonstrated for sheet metal part forming and composite part molding in the aerospace industry. A GUI-based control system positions each of the hydraulically-actuated pins according to a computer model of the intended tool surface. Open-loop position control of individual pins (timing the upward movement of each pin) is possible but accuracy and repeatability are inadequate for most sheet metal forming and composite molding applications. However, closed-loop position control is shown to provide sufficient accuracy and repeatability for these same applications. Once the pin matrix shape is set, it can be made into a rigid forming or molding tool by side clamping with a hydraulic ram. Since the pin ends are spherical in shape, the resulting dimpled tool surface is covered with an interpolating layer of material. The pins can be reset to their lowest position by either withdrawing hydraulic fluid or pushing them down with the setting platen. [S1087-1357(00)01403-9]

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41

Ming, Wuyi, Haojie Jia, Heyuan Huang, Guojun Zhang, Kun Liu, Ya Lu, and Chen Cao. "Study on Mechanism of Glass Molding Process for Fingerprint Lock Glass Plates." Crystals 11, no. 4 (April 8, 2021): 394. http://dx.doi.org/10.3390/cryst11040394.

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Curved glass is widely used in 3C industry, and the market demand is increasing gradually. Glass molding process (GMP) is a high-precision, high-efficiency 3D glass touch panel processing technology. In this study, the processing parameters of fingerprint lock glass panels were deeply analyzed. This paper first introduces the molding process of the glass panel, discusses the glass forming device, and explains the heat conduction principle of the glass. Firstly, it introduces the forming process of the glass panel, discusses the glass forming device, and explains the heat conduction principle of the glass. Secondly, the simulation model of a fingerprint lock glass plate was simulated by MSC. Marc software. The stress relaxation model and structure relaxation model are used in the model, and the heat transfer characteristics of glass mold are combined to accurately predict the forming process of glass components. The effects of molding temperature, heating rate, holding time, molding pressure, cooling rate and other process parameters on product quality characteristics (residual stress and shape deviation) were analyzed through simulation experiments. The results show that, in a certain range, the residual stress is inversely proportional to the bending temperature and heating rate, and is directly proportional to the cooling rate, while the shape deviation decreases with the increase of temperature and heating rate. When the cooling rate decreases, the shape deviation first decreases and then increases. Furthermore, a verification experiment is designed to verify the reliability of the simulation results by measuring and calculating the surface roughness of the formed products.

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42

Wu, Zheng, Chun Yan Wei, and Li Hua Lv. "Preparation and Mechanical Properties of Cotton Stalk Bast Fibers Reinforced Polypropylene Composites." Advanced Materials Research 482-484 (February 2012): 929–32. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.929.

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The cotton stalk bast fibers are a new kind of natural cellulose fibers, which have the similar properties as the flax fibers. Polypropylene (PP) is a type of matrix material and commonly used in composites. The cotton stalk bast fibers as reinforced materials and PP as matrix were used to make a new kind of composite in the experiment. The composites were prepared by mixing, molding and cold forming. Orthogonal experiment table including mass fraction of fibers, molding temperature, molding pressure and molding time was devised. Then the flexural strength, tensile strength and impact strength were tested and the analysis of range was done. The optimal processing condition was obtained as follows: mass fraction of fibers was 30%, molding temperature was 190°C, molding pressure was 12MPa and molding time was 480s. The result showed that the cotton stalk bast fibers reinforced PP composites had good mechanical properties.

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43

De, Xuehong, Bowen Zhang, Wenbin Guo, Jiawei Yang, Jianchao Zhang, and Xiaomin Zhai. "Surface morphology of blended molding pellets made of desert caragana and maize stover." BioResources 18, no. 2 (March 2, 2023): 3019–32. http://dx.doi.org/10.15376/biores.18.2.3019-3032.

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The surface morphology of biomass pellets can provide data for the contact mechanics fractal model between the molding pellet and hole in biomass molding machines and for predicting wear of the molding hole. In this study, desert caragana (Caragana korshinskii) was mixed with residue from maize production, crushed, and compressed into pellets, which were used to collect data on their circumferential surface roughness profile, density, diameter, and hardness. The results showed that frictional wear occurs during contact between the forming hole and the molding particles, increasing the diameter d0 of the forming hole and the diameter d of the molding particles. The density ρ and hardness HD of the molded pellets decreased as their diameter d increased, and the ρ and HD of caragana were higher in autumn than in summer. The values of the roughness parameters Ra, Rc and Rz of the molded particles increased with their diameter d. The maximum material rate Mr2 value of the roughness’s central profile remained at 86% with the increase of diameter d. Molded particles had surface roughness kurtosis Rku>3 and roughness skew Rsk<0 with the increase of diameter d. The surface of molded particles was spiky and negatively skewed, and with a low number of spikes.

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44

Liang, Chunyu, Hao Zhang, Feng Liu, Xili Yan, and Haipeng Bi. "Simulation Analysis of Cement-Stabilized Macadam Compaction Processing Based on the Discrete Element Method." Applied Sciences 12, no. 17 (August 25, 2022): 8505. http://dx.doi.org/10.3390/app12178505.

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The mechanical properties of cement-stabilized macadam (CSM) base mixture are closely related to its forming process. Although the present study investigates the macroscopic effects of molding on cement-stabilized macadam, mesoscopic research analyses of the internal composition’s structural characteristics and change trends after molding lack sufficient intuitiveness. In this study, we built three-dimensional models of cement-stabilized macadam for heavy compaction molding and vibration molding tests based on the discrete element theory. The effects of different molding methods on cement-stabilized macadam’s internal structure were revealed from the mesoscopic perspective by tracking changes in porosity, coordination number, force chain development and internal particle position during the simulation molding process. The simulation results show that (1) the first 10 compactions had a significant influence on the molding effect, and specimens’ height and porosity decreased the fastest; (2) after the simulation experiments, the average coordination number of particles in the vibration molding specimen was 2.3% higher than that of the heavy compaction molding specimen; (3) after the simulation experiments, the vibration molding specimen’s porosity was 2.5% lower than that of the heavy compaction molding specimen; and (4) the vibration molding specimen’s particle distribution was more uniform, whereas the heavy compaction molding specimen’s particle distribution was dense at the top and sparse at the bottom. Overall, the effect of vibration molding is superior to that of heavy compaction molding.

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45

Li, Hailiang, Hongxuan Wang, Weisheng Sun, Chun Wang, Haitian Sun, and Haiming Yu. "Proportion and Performance Optimization of Biomass Seedling Trays Based on Response Surface Analysis." Sustainability 16, no. 3 (January 27, 2024): 1103. http://dx.doi.org/10.3390/su16031103.

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Nursery trays are essential agricultural tools in rice production. Plastic nursery trays pose problems such as resource waste and environmental pollution. Biomass seedling trays are an effective way to achieve sustainable agricultural development. Previous research has been conducted on biomass seedling tray molding equipment and molding process, but the impact of raw material ratio on seedling tray molding quality and seedling growth is still unclear, and the ratio combination still needs further optimization. In this study, we used slurry concentration, pulp content, adhesive content, and the ratio of straw to cow manure as variables. We selected the bowl hole molding rate and the strong seedling index as evaluation indicators, and carried out biomass seedling tray forming experiments and seedling cultivation experiments. The response surface analysis method was used to optimize the raw material ratio of biomass seedling trays from the perspectives of forming effect and seedling quality. The results show that when the slurry concentration is 30%, the pulp content is 20%, the adhesive content is 530 g, and the mass ratio of straw to cow manure is 2:1; the bowl hole molding rate is 91.03%, and the strong seedling index is 0.22, indicating good molding effect and seedling growth. The verification test results indicate that the theoretical analysis results are accurate, and the model fitting is good. These research results provide a theoretical basis for the preparation of biomass seedling trays and technical support for achieving green development in agriculture.

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46

Anokhina, Tatiana S., A. Yu Raeva, and Ilya L. Borisov. "Original Installation for Researching the Process of Forming Polysulfone Hollow Fiber Membranes." Key Engineering Materials 899 (September 8, 2021): 1–8. http://dx.doi.org/10.4028/www.scientific.net/kem.899.1.

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In this work an original installation (manipulator) has been created that allows one to obtain up to 30 samples of hollow fiber membranes in one molding cycle, while simultaneously varying the molding conditions in a wide range (polymer concentration, nature of solvent and precipitant, exposure time in air and in a precipitant environment, post-processing and washing modes samples, diameter of the carrier needle). This installation makes it possible to move to a fundamentally higher level of accumulation of experimental data on the relationship "the composition of the spinning solution - the structure of the hollow fiber membrane - the separating properties of the membrane." It will also make it possible to involve in these studies new laboratory samples of polymers whose synthesis volumes are insufficient for the existing methods of obtaining laboratory samples of hollow fiber membranes. The principle of operation of the manipulator was worked out when obtaining mini-samples of hollow fiber PSF membranes from 24 wt. % PSF solution in NMP with the addition of 19 wt. % PEG-400 blowing agent on a carrier needle with external deposition. Mini-samples were obtained for studies of morphology, mechanical, transport and separation properties in one molding cycle of the manipulator. The properties of mini-samples of hollow fiber PSF membrane were compared with the properties of a membrane made by the method of “dry-wet” molding with internal deposition from a solution of the same composition. It was found that the porous structures of the membranes differ significantly from each other. In a hollow fiber PSF membrane obtained on a manipulator, the porous structure was spongy with separate macrovoids of various shapes. However, in the membrane obtained by the “dry-wet” method, a dense selective layer was formed on the inner side of the backing layer of elongated finger-shaped pores. It is the formation of spongy pores along the entire perimeter of the fiber wall that led to a decrease in the permeability of the hollow fiber PSF membrane obtained on the manipulator. Thus, not only the composition of the solution, but also the molding method makes a significant contribution to the properties of the membrane.

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47

Nakamura, Toshihiko, Shotaro Ishihara, Hideki Aoyama, Naohisa Matsushita, and Akihiko Ushimaru. "Basic Study on Laser Forming CAM System for Sheet Material Forming Without Dies or Molds." International Journal of Automation Technology 4, no. 5 (September 5, 2010): 447–53. http://dx.doi.org/10.20965/ijat.2010.p0447.

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Dies and molds are generally used for press forming and injection molding. However, they are expensive and their production is time consuming, so they are not suitable for prototyping or low-volume production. Laser forming is an effective tool for prototyping and low-volume production because it enables one to form sheet material without dies or molds. Laser forming is the deformation process caused by the thermal stress generated in the sheet by laser irradiation. In this paper, a Laser Forming System is proposed for determining laser irradiation conditions for forming a required shape.

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48

Guo, Yu Qin, Xin Yang, Juan Juan Han, and Wei Chen. "Blow Molding Process Optimization of Amorphous Alloy Tube Blank Based on POLYFLOW Software." Applied Mechanics and Materials 121-126 (October 2011): 3827–31. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.3827.

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Aimed at Zr44Ti11Cu10Ni10Be25 amorphous alloy and based on POLYFLOW software, studies the influence of die inlet diameter, blowing pressure and die transition fillet on the blow molding performance of tube blank systemly, and raises a new evaluation index to evaluate the formability of amorphous tube blank, limit height to diameter ratio (LHTDR) . The simulation results indicate that the forming limit of tube blank can be multiple improved with the decrease of die inlet diameter, blowing pressure has a significant effect on the forming limit which can be improved by decreasing the pressure, and the larger of the die transition fillet the higher of the forming limit in certain range. Finally, a set of reasonable process parameters is given which has great significance for guiding the formulation of blow molding process scheme.

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49

Dai, Guangming, Lihua Zhan, Chenglong Guan, and Minghui Huang. "Effect of forming process on mechanical and interfacial properties for thermoplastic composite I-stiffened structures." High Performance Polymers 34, no. 3 (December 9, 2021): 282–91. http://dx.doi.org/10.1177/09540083211051585.

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The forming process is the core factor to control the quality of thermoplastic composite components. In this paper, the common I-stiffened structures in the aerospace field were taken as the research object, and the forming process scheme was designed. Based on the prefabrication of C-shaped parts, the I-stiffened structures were prepared by the compression molding process. The influence law of molding temperature on the quality of the prefabricated C-shaped parts was explored. The time dependence of the PEEK melt viscosity was tested to provide the basis for the optimization of forming process parameters of I-stiffened structures. The influencing mechanism of thermoplastic composites repeatedly forming to the bonding strength of remelting interface was studied. The results show that repeated forming would lead to polymer aging and result in low bonding strength at the remelting interface of the I-stiffened structures. Optimizing the forming process could effectively reduce the aging of materials and improve the bonding strength of the remelting interface and overall mechanical properties of components. The research provides technical guidance for the manufacturing of complex thermoplastic composite components, especially the influence mechanism of the forming process on the bonding strength of remelting interface.

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50

Kong, Yan, Xiaoyi Cui, Zhibing Zhang, and Yuqi Liu. "Research on and Application of Feature Recognition and Intelligent Retrieval Method for Multi-Component Alloy Powder Injection Molding Gear Based on Partition Templates." Metals 14, no. 5 (May 14, 2024): 579. http://dx.doi.org/10.3390/met14050579.

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The forming process of multi-alloy gears by metal powder injection molding is tedious, and the current design process mainly depends on the experience of designers, which seriously affects the product development cycle and forming quality. In order to solve the problem of the gear feature expression being missing, which hinders the automatic retrieval of similar parts in the analogical design process, a feature recognition and intelligent retrieval method for a multi-alloy powder injection molding gear based on partition templates is proposed in this paper. The partition templates of the gear are defined, and gear digitization is completed by using the automatic recognition algorithm. Searching for similar gear parts in the knowledge base, designers can analogically design the forming process for new parts according to the mature process of the parts in the knowledge base. The automatic identification and intelligent retrieval system developed according to this method has been implemented in two MIM (metal injection molding) product manufacturing enterprises. Case studies and industrial applications have proved the effectiveness of the system, the efficiency of identification and retrieval has been improved by more than 97%, and the number of mold tests has been reduced by 60%.

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Journal articles on the topic 'Molding (forming)'

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