Numerical and experimental studies of injection compression molding process for thick plastic gas valve stem

Han, Shuai; Cho, Jin-Rae; Beak, Si-Young; Hong, Jong-Hwan; Lee, Y. S.

doi:10.1007/s00170-016-9139-6

Cited by 15 publications

(4 citation statements)

References 21 publications

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“…In this study, the injection mold was employed in wax injection molding for manufacturing precision wax patterns. Note that the proposed method can also be employed in plastic injection molds [48-50,], blow molding dies [51], metal injection molding molds [52], powder metallurgy molds [53], die casting dies [54], hot extrusion dies [55,56], injectioncompression molding molds [57], rotational molding dies, thermoforming molds, transfer molding dies, or hot stamping dies [58]. Finally, it is worth noting that two further studies are required for enhancing the surface quality of a precision mold machined and dimensional accuracy of a precision mold machined.…”

Section: Resultsmentioning

confidence: 99%

A Cost-Effective Method for Rapid Manufacturing a Precision Mold With Microstructures Using Hybrid Manufacturing Technologies

Kuo¹,

Lin²,

Luo³

2021

Preprint

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Injection molding is a cost-effective to manufacture molded products by injection molding machine. A precision part with microstructures can be fabricated effectively through a precision mold. In this study, a cost-effective method for rapid manufacturing a precision component and a precision injection mold with microstructures by integrating additive manufacturing, rapid tooling, and computer numerical control milling. It was found that of the dimensional accuracy of a precision component in the length, width, and height can be controlled at approximately 30 µm. Injection molding was performed using an injection mold with microstructures with a microstructure of 950 µm and the dimensional accuracy of a molded part in the length, width, and microstructure can be controlled at approximately 60 µm, 50 µm, and 10 µm, respectively. The remarkable findings of this study can be used for the fabrication of molds or dies efficiently and economically for trial production in the mold industry since the quality of the precision component and the precision mold can meet the standards of the general industry.

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Section: Resultsmentioning

confidence: 99%

A Cost-Effective Method for Rapid Manufacturing a Precision Mold With Microstructures Using Hybrid Manufacturing Technologies

Kuo¹,

Lin²,

Luo³

2021

Preprint

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“…Figure 5a represents 3-D finite element model for the injection molding analysis, where the finite element mesh was generated with 3-D tetra elements and the total number of elements is 466,307. Regarding the cooling system [7], baffle and line cooling circuits are compositively prepared for the stationary plate, while the moving plate is cooled by only straight-line cooling circuits. The flow system is a cold system composed of sprue, runner and gate.…”

Section: Determination Of Optimum Thickness Of Pab Housingmentioning

confidence: 99%

Development of plastic passenger air bag (PAB) housing for replacing the steel PAB housing and reducing the automobile weight

Han

Park

Cho

2018

J Braz. Soc. Mech. Sci. Eng.

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This paper is concerned with the development of plastic passenger air bag (PAB) housing in order to replace the conventional heavy and expensive steel PAB housing. The optimum plastic thickness and molding conditions are determined by utilizing the parametric injection molding analysis and Taguchi design of experiments. The mold is reversely designed to compensate the inherent deformation of plastic PAB housing after molding. The plastic PAB housing is molded under the optimum molding conditions, and the maximum deformation and the total weight are measured and compared with the conventional steel PAB housing. In order to evaluate the performance of plastic PAB housing, the spread out test and the damage inspection are performed at the level of air bag housing assembly. It is found that the total weight is reduced by 23% and the inherent maximum deformation is less than 0.2 mm. Furthermore, it is found that the plastic PAB housing successfully passes all the evaluation tests.

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“…Among the various manufacturing methods, injection molding using plastic material has the advantage of making even complex shapes into a one-time process. Also, it is specialized for the mass production of products with the identical shape and dimensions and is actively used in our daily lives and the industrial sector [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Plast.1964 Mater. Plast., 58 (4) The Taguchi method, one of the design of experiment (DOE) method, is actively being utilized as a recommended production-site-friendly method for effectively and quickly optimizing various injection molding parameters [8][9][10]. The Taguchi method is a proven optimization method applied in the injection molding field and other industries.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Injection Molding of Automotive Plastic Horn Cover Part Using Taguchi Method and Reverse Engineering

Lee¹,

Cho²,

Han³

2022

Mater. Plast.

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The aim of the paper consisted in the development of an injection mold for plastic horn cover parts in commercial vehicles. Three mold types were designed in anticipation of the structure and quality of molds, and injection molding numerical analyses were conducted for the three types of molds. One mold type was selected in consideration of the resin flow patterns inside the mold, surface quality, and final deflection amount of the horn cover. To perform optimal injection molding using the selected mold, optimization of injection molding parameters was performed using the Taguchi method, one of the designs of experiment (DOE) and ANOVA methods. As a result, it was confirmed that the deflection amount of the molding under optimal molding parameters decreased by about 34.3% compared to the deflection amount before optimization of the molding parameters. Based on these encouraging results, the previously selected mold type was actually manufactured. The horn cover was molded using the obtained optimal injection molding parameters to the manufactured mold. To verify the precision of the molded horn cover, the deflection amount of the molding was measured with a 3D scanner. The deflection amount of the horn cover was estimated to be about 11% to 43% larger for each measurement position than the deflection amounts in the analysis results. The manufactured mold was revised to solve the problem that the deflection amount of the actual molding is larger than the deflection amount predicted by injection molding analysis. The dimensions and surface quality of the horn cover with a revised mold were satisfactory.

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Numerical and experimental studies of injection compression molding process for thick plastic gas valve stem

Cited by 15 publications

References 21 publications

A Cost-Effective Method for Rapid Manufacturing a Precision Mold With Microstructures Using Hybrid Manufacturing Technologies

A Cost-Effective Method for Rapid Manufacturing a Precision Mold With Microstructures Using Hybrid Manufacturing Technologies

Development of plastic passenger air bag (PAB) housing for replacing the steel PAB housing and reducing the automobile weight

Optimization of Injection Molding of Automotive Plastic Horn Cover Part Using Taguchi Method and Reverse Engineering

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