多型芯径向抽芯注塑模设计

Design of Injection Mould with Multiple Radial Core-Pulling Devices

轴套塑件上有12个周向均布的圆孔,注塑生产时需要多型芯径向抽芯。为此设计了一种特殊的轴套注塑模具,论述了模具结构特点和工作原理。该模具利用异型弯销、转盘及滑块完成多型芯径向抽芯,而未采用一般的齿轮-齿条机构或连杆机构,简化了模具结构。采用三脚推管推出塑件,解决了轴套塑件脱模难的问题。模具结构简单紧凑,工作可靠,操作方便,成型塑件质量好。

There are 12 holes circumferencially equispaced on the cylindrical surface of the injection moulded article-bush, requiring mould with multiple side action core pulls in its moulding. Therefore, a special-purpose injection mould is designed for the article. This mould uses angle pin cam, rotating disk and slide block to complete the multiple radial-core-pulling, instead of convenient gear-rack assemblies or toggle mechanism, the structure of such mould is then simplified. A special type of ejector-stripper bushing with three ejecting points is used to remove the finished part after moulding. This eliminates ejection problems and makes possible automatic operation. The mould is compact in structure, reliable in operation, the quality of moulded part is excellent.