浇口设计对注塑件翘曲变形的影响分析

浇口设计是影响熔融塑料的流动、制品的收缩和最终尺寸稳定性的最重要因素之一。本文利用Moldflow软件分析了浇口的位置、浇口的数量以及浇口尺寸对注塑件翘曲变形的影响。结果发现浇口位置对注塑件翘曲变形的影响主要体现在与浇口的距离上，部位距离浇口越远，则其翘曲变形量越小；而浇口数量对翘曲变形的影响，除最差情形外，影响不甚明显；但浇口尺寸对翘曲变形的影响比较显著，随着浇口尺寸的增加，注塑件的翘曲变形减小。该研究可对注塑模浇口设计提供有效指导，从而缩短模具开发周期和试模次数，降低模具开发成本。

Influence Analysis of Gate Design to Warpage of Injection Molded Parts

Gate design is one of the most important factors having influence on the flow of plastic melt, shrinkage of products, and the final size of parts. This paper analyzed the influence of gate position, gate numbers and size of the injection molding gate by the Moldflow software and found that the location of the gate impacting on warpage of injection molded parts mainly reflected by the distance between location of gate and the part, the greater the distance, the less warpage; while the influence of number of gates on warpage is ambiguous except the worst condition; but the size of the gate has stronger impact on warpage of injection molding parts with the gate size increasing, warpage of plastic parts reducing. This result will provide the injection mold gate design with effective guidance, and thus shorten the development cycle and numbers of try mold and reduce mold development costs.