内外推管同时推件圆柱齿轮注射模设计

Design of injection mould for cylindrical gear with internal and external ejector sleeves for the stripping in one time

为了推出塑件时不产生超差变形,无顶出痕,设计了内、外推管同时推件圆柱齿轮注射模,并介绍了模具结构特点和工作过程。模具采用爪形浇口进料,塑件脱模时受力均匀,比压小,无推痕。

An injection mould for a cylindrical gear was developed with internal and external ejector sleeves for the stripping of the part in one time.The ejected plastic gear has no outoftrue distortion and stripping mark.An introduction was made on the structural characteristics and working process of the mould,in particular the claw type gate.The plastic gear is uniformly ejected with low specific pressure and has no outoftrue distortion and no stripping mark.