压铸件缺陷特征及其防止措施

分析了压铸件气孔、缩松、夹杂、冷隔、尺寸超差及表面质量问题等缺陷特征，从模具设计、熔炼工艺及涂料使用等方面对缺陷产生的原因进行了探讨。结果发现，在合理的零件结构基础上，通过改进浇注系统，调整模具温度及金属液温度，并采用正确的喷涂方法，可有效防止压铸件缺陷的产生。

Analysis of Defects and Prevention in Die Casting

There are possible defects in die casting, such as gas porosity, shrinkage, inclusion, cold shut, size tolerance and surface quality. From die design, melting and release agent, the influence on defects has been analyzed. With suitable casting structure, improving pouting system, controlled pouting and die temperature and improved release agent spray can help to prevent defects.