Study on Transient Heat Transfer of Micro-injection Molded Structures based on the Finite Element Method

摘要

Injection molded part with micro structures is extensively used as a heatsink, which will provide bright prospects for application. In this present study, analytical models with micro pins, micro holes and micro grooves were specially designed and built. Molding quality and transient heat transfer performance of these parts were investigated via the finite element methods. As research objective, warpage and residual thermal stress of each target under identical molding conditions was compared to evaluate the product quality, and heat dissipation performance of micro structures was applied to assess the applicability of plastic products used as heatsinks. Study results revealed that the part with micro grooves had better molding quality and heat dissipation effectiveness than others.