The text analyses some key problems of accurately machining of O circle mouldcavity, including its technology, measurement, and machining error, and then puts forward a CAD example for it.
Gas hole and inclusion can be reduced by properly increasing thickness, and quality of the chilling layer, uniformly spraying and cleaning the mouldcavity on time.
适度增加激冷层厚度，提高激冷层品质，均匀喷涂并及时清理模具型腔，可减少气孔和夹杂物缺陷。
3
This paper discusses various factors which affect the dimensional torlerence of products of precise mould and offers a multi-object optimal method for designing cavity dimensions of precise mould.