Analysis and Simulation of Short Shot Defects in Plastic Injection Molding at Multi Cavities

E. A. Wibowo, A. Syahriar, Agung Kaswadi
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引用次数: 2

Abstract

This radiator cover mold has been made and has gone through the first pre-production trial stage (T0). However, the product experienced a short shot defect in the 1st cavity. After testing using Moldflow, there is a difference in injection time that is quite long between the 1st cavity and 2nd cavity. There is a need for a new design on the feeding system that can speed up injection time in 1st cavity, so differences in injection time can be minimized. The analysis is done by making variations of the size of the feeding system, which is: runner diameter, width, and thickness of the gate using Taguchi and ANOVA method. The analysis shows that the optimal design of the diameter runner is 8 mm while the size of the wide gate is 10 mm and the thick gate is 0.8 mm. The validation process is repeated using Moldflow with the result of a concise injection time difference is 0.001 s. The new design of feed system able to eliminate the difference in filling time in this product.
多腔注射成型中短粒缺陷的分析与仿真
这个散热器盖模具已经制作完成,并通过了第一次生产前试制阶段(T0)。然而,该产品在第一个空腔中出现了短射缺陷。在使用Moldflow测试后,第一腔和第二腔之间的注射时间差异相当长。需要对进料系统进行新的设计,以加快第一腔的注射时间,从而最大限度地减少注射时间的差异。分析是通过使进料系统的尺寸,即流道直径,宽度和浇口厚度的变化,使用田口和方差分析方法完成的。分析表明,最优设计的流道直径为8 mm,宽浇口尺寸为10 mm,厚浇口尺寸为0.8 mm。使用Moldflow重复验证过程,结果显示简洁的注射时差为0.001 s。新设计的进料系统能够消除该产品在灌装时间上的差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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