In view of the structural difficulties in the mold designs for parts with five undercuts in the front narrow cavity,two annular undercuts in the back narrow cavity,seventeen undercuts on four sides,and seven undercuts on the back,the core-pulling method of hanging side core by the slider movement direction perpendicular to the side core with tunnel wedge block was innovatively put forward to realize the core pulling of undercuts in narrow cavity.Then four types of core-pulling mechanism were designed.With the addition of four-time sequence core pulling,the demoulding of products with complex undercuts in the narrow cavity was successfully realized.The first core pulling solved the demoulding problem of five undercuts in the front narrow cavity,which was controlled by the sequential spacing parting mechanism.The second core pulling solved the demoulding problem of seventeen undercuts on four sides.The third core pulling solved the demoulding problem of seven undercuts on the back.The fourth core pulling solved the demoulding problem of two annular undercuts in the back narrow cavity,in which the core-pulling sequence was innovatively controlled by the spring-type quick secondary ejection mechanism.The mold testing results show that the mold is reasonable in structure and reliable in operation.
关键词
正面窄腔内倒扣/吊挂侧型芯式侧抽芯机构/弹簧式快速二次推出机构/4次顺序抽芯
Key words
Undercuts in the Front Narrow Cavity/Side Core-Pulling Mechanism of Hanging Side Core Type/Spring-Type Quick Secondary Ejection Mechanism/Four-Time Sequence Core Pulling
维普
万方数据