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Relevant bibliographies by topics / Plastic injection molds

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Journal articles

Academic literature on the topic 'Plastic injection molds'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Plastic injection molds"

1

Chval, Zdenek, Karel Raz, and Frantisek Sedlacek. "Design of Injection Mold from Plastic Material." Key Engineering Materials 847 (June 2020): 75–80. http://dx.doi.org/10.4028/www.scientific.net/kem.847.75.

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This paper deals with the use of plastics for making injection molds. Mold production times reduced by 90% and costs cut by up to 75% are some of the benefits of prototype molds from plastic materials. Today, materials with melt temperatures above 300 °C are used for plastic molds. They include ABS, PE, PP and PA. In this study, testing of high-temperature resin from Formlabs was performed. Compression and tensile test data are compared with the datasheet values and with virtual simulations. The tests were carried out at different temperatures. Based on their results, one can identify a suitable molding process with molds from this material.

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2

Zhao, Zhen Yu, Long Liao, Fei Tang, and Bai Liu. "Moldflow Software in a Complex Plastic Shell Injection Mold Design." Applied Mechanics and Materials 29-32 (August 2010): 646–50. http://dx.doi.org/10.4028/www.scientific.net/amm.29-32.646.

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The paper describes the important role of Moldflow technology and status. Through the application of Moldflow / MPI (Moldflow Plastics Insight) software for CAE under a comprehensive analysis of the shell molds, injection molding parameters such as mold temperature, melt temperature, injection time and injection pressure are used to simulate the actual production process. This shows the Moldflow technology plays a significant role in the mold development process for optimizing plastic products design, plastic mold design and injection process parameters, etc.

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3

Li, Shan, Liang Xu, and Yu Qi Wang. "Design and NC Manufacturing of Plastic Injection Mold Based on UG Software." Advanced Materials Research 630 (December 2012): 163–66. http://dx.doi.org/10.4028/www.scientific.net/amr.630.163.

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On the platform of the UG Software’s CAD/MoldWizard/CAM components, the whole process of design and NC manufacturing of the plastic injection mold of a hair dryer’s shell was completed. The CAD/CAM process of the plastic injection mold was introduced by the practical application. The large advantage of the UG platform over the traditional method in the field of plastic injection molds’ design and manufacturing was reflected. The plastic injection molds’ design and manufacturing is a great challenge to the traditional design and manufacturing method, and the UG solutions can promote mold manufacturers’ ability of design and manufacturing remarkably.

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4

Mesquita, Rafael Agnelli, and Reinhold S. E. Schneider. "Tool Steel Quality And Surface Finishing of Plastic Molds." Exacta 8, no. 3 (2011): 307–18. http://dx.doi.org/10.5585/exacta.v8i3.2442.

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Plastic industry is today in a constant growth, demanding several products from other segments, which includes the plastic molds, mainly used in the injection molding process. Considering all the requirements of plastic molds, the surface finishing is of special interest, as the injected plastic part is able to reproduce any details (and also defects) from the mold surface. Therefore, several aspects on mold finishing are important, mainly related to manufacturing conditions – machining, grinding, polishing and texturing, and also related to the tool steel quality, in relation to microstructure homogeneity and non-metallic inclusions (cleanliness). The present paper is then focused on this interrelationship between steel quality and manufacturing process, which are both related to the final quality of plastic mold surfaces. Examples are discussed in terms of surface finishing of plastic molds and the properties or the microstructure of mold steels.

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5

Mesquita, Rafael Agnelli, and Reinhold S. E. Schneider. "Tool Steel Quality And Surface Finishing of Plastic Molds DOI: 10.5585/exacta.v8i3.2442." Exacta 8, no. 3 (2011): 307–18. http://dx.doi.org/10.5585/exactaep.v8i3.2442.

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Abstract:

Plastic industry is today in a constant growth, demanding several products from other segments, which includes the plastic molds, mainly used in the injection molding process. Considering all the requirements of plastic molds, the surface finishing is of special interest, as the injected plastic part is able to reproduce any details (and also defects) from the mold surface. Therefore, several aspects on mold finishing are important, mainly related to manufacturing conditions – machining, grinding, polishing and texturing, and also related to the tool steel quality, in relation to microstructure homogeneity and non-metallic inclusions (cleanliness). The present paper is then focused on this interrelationship between steel quality and manufacturing process, which are both related to the final quality of plastic mold surfaces. Examples are discussed in terms of surface finishing of plastic molds and the properties or the microstructure of mold steels.

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6

Luo, Guang Si. "Research on Three Dimensional Design of Cavity of Injection Molds of Involute Plastic Gears." Advanced Materials Research 472-475 (February 2012): 2859–63. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.2859.

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The crux to the 3D design of cavity of injection molds for involute plastic gears is to solve the difficulty in zooming the cavity of molds and the accurate molding of the involute tooth profile. Researches have shown that the shrinkage of involute tooth profile is non-linear during the injection molding process of plastic gears. This paper presents the 3D design of cavity of injection molds for involute gears based on SolidWorks after offering an introduction to the relationship between the cavity tooth profile of injection molds for small-modulus plastic gears and the tooth profile of injection molding part.

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7

Kojima, Michio, Hiroyuki Narahara, Yoshiyuki Nakao, et al. "Permeability Characteristics and Applications of Plastic Injection Molding Fabricated by Metal Laser Sintering Combined with High Speed Milling." International Journal of Automation Technology 2, no. 3 (2008): 175–81. http://dx.doi.org/10.20965/ijat.2008.p0175.

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This paper describes the results of fundamental experiments conducted by injection mold with permeability fabricated by Metal Laser Sintering Combined with High Speed Milling. Metal Laser Sintering Combined with High Speed Milling is attracting attention as a new mold fabrication approach. This machining method combines the metallic powder layer fabrication method with high-speed cutting. Since this process does not have the problem of tool L/D in usual cutting, it provides outstanding shape machining performance of deep ribs etc. Moreover, with this processing method, sintered density can be controlled by changing the exposure conditions of the laser beam, and gas permeable structures can also be manufactured. This fabrication method does not require the mold to be divided. From these features, this method is expected to offer such advantages as quick delivery of molds and low manufacturing costs. However, little is known about the application of laser sintered metallic molds which have gas permeability structure to plastic injection molding, and the practical use of these molds is not easy. The aim of this research was therefore to investigate the gas permeable structures realized by laser sintered metallic mold in plastic injection molding The results confirmed that permeable injection molds are effective for influencing residue air in products.

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8

Nemoto, Akihiko, Hitoshi Ohmori, Yasuhiko Murata, and Nobuhide Itoh. "Ultraprecision ELID-Grinding of Aspheric WC Lens Mold for Plastic Injection Molding." Key Engineering Materials 447-448 (September 2010): 155–58. http://dx.doi.org/10.4028/www.scientific.net/kem.447-448.155.

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To cope with increasing demands on ultraprecision profiling and finishing of aspheric lens molds, we have implemented an ultra/ nanoprecision aspheric grinding system to be mounted with an ELID- capability and on-line feedback capability of profile accuracy. A WC mold has successfully ground and finished to be with several nanometric surface smoothness and with ultraprecise profile accuracy by just grinding process with ELID mechanism. Some specific conditions have been investigated to achieve better accuracy and quality on molds. This paper presentation introduce those R&D activities and also discuss on the latest achievements on this topics, with showing injected aspheric lenses by the molds.

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9

Cao, Xiu Zhong. "Juice Extractor Stent Plastic Mould Structure Design." Applied Mechanics and Materials 214 (November 2012): 173–76. http://dx.doi.org/10.4028/www.scientific.net/amm.214.173.

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The design of plastic parts structure analysis, confirmed the mould adopts the exactly two cavities, with two points type surface, three board type injection molds. Exhaust systems use the parting surface and lateral slide block clearance, plunger, cooperate with clearance to exhaust, and using a runner filling mold overall layout form. In the mold design process, the design of classification, gating system, exhaust system, cooling system, demoulding mechanism, are introduced in this paper.

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10

Murata, Yasuhiko, and Masahiro Kuramochi. "Development of Heating and Cooling Injection Mold with Far-Infrared Radiation Heater." International Journal of Automation Technology 10, no. 1 (2016): 79–86. http://dx.doi.org/10.20965/ijat.2016.p0079.

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Several rapid heating and cooling molding methods have been developed for practical use to improve the surface quality of plastic injection-molded products. These methods, however, need expensive equipment and complex molds that require vast know-how, and hence cannot be applied easily to actual production. In order to establish a molding method in which the mold’s cavity surfaces can easily be heated, we designed and manufactured a heating and cooling injection mold with a far-infrared radiation heater. Using this mold, we molded a high-impact polystyrene molded product, and found that the use of such a mold could lead to a decrease in the V-shaped groove depth of weld lines, as well as to an improvement in the transcription of the mold’s cavity surface quality onto the molded product. We also carried out tensile tests on the molded products to confirm whether the use of such a mold could increase the product’s elongation at break.

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