Development of a Mold for Flash Generation Measurement

飞边是注塑成型过程中产生的一种缺陷。在这项研究中，提出了闪光产生测量模型来评估二次闪光产生机理。该模具在注塑成型过程中，可以在一定的时间内打开模具分模面之间任意大小的缝隙。利用该模具，研究了不同分模面间隙大小和熔体压力下的飞边产生行为。结果表明，二次闪光是在间隙达到恒定尺寸后立即开始产生的，二次闪光长度随着间隙打开的时间推迟而减少。

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.