Development of a Mold for Flash Generation Measurement

飞边是注塑成型中出现的一种缺陷。本研究提出了闪光产生测量模型来评估二次闪光产生机制。该模具可在注射成型过程中的特定时间打开模具分型面之间任意大小的差距。使用该模具，在不同的模具分型面和熔体压力之间的间隙大小的飞边产生行为进行了研究。其结果是，明确了在差距达到恒定尺寸之后立即开始产生二次闪光，并且二次闪光长度随着间隙打开的定时延迟而减小。

Flash is a defect that occurs in injection molding. In this study, the flash generation measurement mold was proposed to evaluate the secondary flash generation mechanism. This mold can open the gap of arbitrary size between the mold parting faces at certain times during injection molding. Using this mold, flash generation behavior was investigated at various gap sizes between the mold parting faces and melt pressure. As a result, it was clarified that the secondary flash began to be generated immediately after the gap reached a constant size and that the secondary flash length decreased as the timing was delayed for gap opening.