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A Study on injection mold shrinkage estimates  

Choi, Gwang-Hyeck (Department of Mold & Die Engineering, Kongju National University)
Han, Seong-Ryeol (Department of Mold & Die Engineering, Kongju National University)
Lee, Chun-Kyu (Department of Metal Die Design Engineering, Yuhan College)
Publication Information
Design & Manufacturing / v.10, no.3, 2016 , pp. 30-33 More about this Journal
Abstract
It is true that the plastic shrinkage is inevitable. Shrinkage rate in effect at the time of mold design will soon determine the size of the global product. Process for the shrinkage of the plastic that provides how made, yet it has identified a process for making the question whether the shrinkage that can be trusted, and by the experimental results were as follows: as shrinkage, see ISO but, according to circumstances the process can go to the agreement between the parties. shrinkage ratio of the pressure sensor installed in the specimen mold is essential, amount of pressure sensor is that it is appropriate approximately 2-3. proper holding pressure is a significant effect on shrinkage Mitch, so that the effect of selecting the contraction ratio data according to the appropriate holding pressure during mold making. shrinkage CAE analysis results are difficult to utilize in the mold-making chamber. Based on these results, it concluded by looking forward to the improved products produced shrinkage.
Keywords
Injection; Packing; Pressure; Shrinkage;
Citations & Related Records
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  • Reference
1 ISO 294-1 First edition 1996-12-15 / AMENDMENT 1 2001-01-15, Plastics - Injection moulding of test specimens of thermoplastic materials - Part 1: General principles, and moulding of multipurpose and bar test specimens, 1996.
2 ISO 294-4: Second edition 2001-12-15, Plastics - Injection moulding of test specimens of thermoplastic materials -Part 4: Determination of moulding shrinkage, 2001.
3 ISO 294-3 : Second edition 2002-06-01, Plastics - Injection moulding of test specimens of thermoplastic materials - Part 3: Small plates, 2002.
4 전강일, 사출성형 공정 캐비티 내압력측정과 CAE 해석을 활용한 첨도 함수 추정.
5 이옥성, Cavity 내압력 측정에 의한 사출성형에서의 최적생산.
6 ISO 294-1:1996 4.1.1.4, item k) and ISO 294-3:-, Figure 2, 1996.
7 유중학 김회송, 사출성형에서캐비티 압력과 인장강도에 관한 연구.