中文摘要：

对汽车安全玻璃进行包边塑料注射成形时,玻璃作为嵌件会出现与塑料结合不紧密而脱落等情况,为此,研究了包边塑件注射成形过程中的传热情况。首先建立了由模腔分别向玻璃与模壁之间传热的简化模型和传热方程,然后利用试验方法测量得到从注射填充结束到冷却完成时间段内的温度曲线,结果显示,塑料表面和动静模表面的温度变化有一定的时间差异,且均有小幅的温度回升。利用传热模型计算得到包边成形过程的焓变曲线,得到温升滞后时间与焓变极值之间的关系。传热分析结果揭示了包边塑件脱模以及与玻璃包紧的传热过程,从而为模具结构设计和成形工艺设计提供参考。

英文摘要：

In the injection molding process of wrapped plastic in vehicle safe glass,the flaws always appear in the surface and the plastic may fall off from the glass because of the untight adhesion.The heat transport phenomenon was analyzed in the injection molding of wrapped plastic.First,a simplified model and the equations of heat transfer from the cavity to glass and mold walls were set up.Then the temperature curves from filling to the ejection of plastic were obtained by experiments.The results show that the temperature distribution of the plastic surfaces,moveable mold and stationary mold is different somewhat in time domain,with temperature rising in small amplitude.The enthalpy of the molding process of wrapping plastic calculated by the heat transfer model show that the temperature rising delay is in coincidence with the enthalpy distribution.This heat transfer analysis discloses the mechanism that the wrapped plastic fall off from the mold and surround the glass tightly,which can be used as the reference for the mold structure design and processing design.