Characterizations of Polymer Gears Fabricated by Differential Pressure Vacuum Casting and Fused Deposition Modeling

Kuo, Chil-Chyuan; Li, Ding-Yang; Lin, Zhe-Chi; Kang, Zhong-Fu

doi:10.3390/polym13234126

Cited by 10 publications

(6 citation statements)

References 30 publications

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“…It was found that this hybrid has a regular layered morphology, which increased the mechanical strength of the product. The tensile strength increased by 44% [93,94]. The vacuum casting method in silicone molds uses less expensive tools and materials, and is therefore a good alternative to existing microform production methods.…”

Section: Vacuum Casting (Vc) Methodsmentioning

confidence: 99%

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Rapid Prototyping Technologies: 3D Printing Applied in Medicine

Oleksy,

Dynarowicz,

Aebisher

2023

Pharmaceutics

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Three-dimensional printing technology has been used for more than three decades in many industries, including the automotive and aerospace industries. So far, the use of this technology in medicine has been limited only to 3D printing of anatomical models for educational and training purposes, which is due to the insufficient functional properties of the materials used in the process. Only recent advances in the development of innovative materials have resulted in the flourishing of the use of 3D printing in medicine and pharmacy. Currently, additive manufacturing technology is widely used in clinical fields. Rapid development can be observed in the design of implants and prostheses, the creation of biomedical models tailored to the needs of the patient and the bioprinting of tissues and living scaffolds for regenerative medicine. The purpose of this review is to characterize the most popular 3D printing techniques.

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Section: Vacuum Casting (Vc) Methodsmentioning

confidence: 99%

“…It was found that this hybrid has a regular layered morphology, which increased the mechanical strength of the product. The tensile strength increased by 44% [ 93 , 94 ].…”

Section: A Review Of the Literaturementioning

confidence: 99%

Rapid Prototyping Technologies: 3D Printing Applied in Medicine

Oleksy,

Dynarowicz,

Aebisher

2023

Pharmaceutics

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“…One of the factors that determines the quality of injection molded parts is the weld line [ 50 , 75 , 76 ]. The weld line refers to the process in which the liquid material is divided into two or more flows in the cavity during the injection process and merged together after a period of time [ 51 , 77 , 78 , 79 ].…”

Section: Injection Molding Processmentioning

confidence: 99%

Potential of Rapid Tooling in Rapid Heat Cycle Molding: A Review

et al. 2022

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Rapid tooling (RT) and additive manufacturing (AM) are currently being used in several parts of industry, particularly in the development of new products. The demand for timely deliveries of low-cost products in a variety of geometrical patterns is continuing to increase year by year. Increased demand for low-cost materials and tooling, including RT, is driving the demand for plastic and rubber products, along with engineering and product manufacturers. The development of AM and RT technologies has led to significant improvements in the technologies, especially in testing performance for newly developed products prior to the fabrication of hard tooling and low-volume production. On the other hand, the rapid heating cycle molding (RHCM) injection method can be implemented to overcome product surface defects generated by conventional injection molding (CIM), since the surface gloss of the parts is significantly improved, and surface marks such as flow marks and weld marks are eliminated. The most important RHCM technique is rapid heating and cooling of the cavity surface, which somewhat improves part quality while also maximizing production efficiencies. RT is not just about making molds quickly; it also improves molding productivity. Therefore, as RT can also be used to produce products with low-volume production, there is a good potential to explore RHCM in RT. This paper reviews the implementation of RHCM in the molding industry, which has been well established and undergone improvement on the basis of different heating technologies. Lastly, this review also introduces future research opportunities regarding the potential of RT in the RHCM technique.

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“…Polymer gears have a number of drawbacks, the most notable of which are reduced load-bearing capacity, poorer thermal conductivity, lower temperature stability, and poor manufacturing precision. While the load-bearing capacity is extremely important, several studies can be found on improving this property, either with improved gear design [2,3] or improved materials [4][5][6]. However, there is a lack of systematic studies addressing the geometrical quality of injection moulded polymer gears, since only a few studies can be found on this topic.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Areal Geometric Quality Characterisation of Injection Moulded Thermoplastic Gears

et al. 2022

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Injection moulding is currently the most widely employed production method for polymer gears. Current standardised gear metrology methods, which are based on metal gear inspection procedures, do not provide the key information regarding the geometric stability of injection moulded gears and are insufficient for a thorough gear inspection. The study developed novel areal quality parameters, along with a so-called moulding runout quality parameter, with a focus on the injection moulding method. The developed parameters were validated on twenty-nine gear samples, produced in the same moulding tool using various processing parameters. The gears were measured using a high-precision structured-light 3D scanner. The influence of injection moulding process parameters on the introduced novel quality parameters was investigated. The developed moulding runout quality parameter proved to be effective in evaluating the shrinkage that can occur in the injection moulding process. The novel moulding runout parameter returned an average value of −21.8 μm in comparison to 29.4 μm exhibited by the standard parameter on all the gears, where the negative value points directly to mould shrinkages. The rate of cooling was determined to be the most influential factor for the shrinkage of the gear. The developed areal parameters demonstrated to be advantageous in characterising the deviations on the teeth more comprehensively.

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Characterizations of Polymer Gears Fabricated by Differential Pressure Vacuum Casting and Fused Deposition Modeling

Cited by 10 publications

References 30 publications

Rapid Prototyping Technologies: 3D Printing Applied in Medicine

Rapid Prototyping Technologies: 3D Printing Applied in Medicine

Potential of Rapid Tooling in Rapid Heat Cycle Molding: A Review

Comprehensive Areal Geometric Quality Characterisation of Injection Moulded Thermoplastic Gears

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