汽车线材接插件成型模内模锁紧方法的研究

Investigation of lock way for internal mold of connector molding of car wire

以一款国外客户(博世集团)的汽车线材接插件成型模为例,讲述了该类产品由于精度要求过高,客户要求成型尺寸必须符合全检合格后才可以验收。而汽车线材接插件成型模需要二次成型,第一次是成型内模。也就是不考虑最终外形,首先将导线和金属接插头用塑料成型固定,形成内模。然后将该内模放置于成型模具中进行二次注塑,达到成品。目前传统工艺在二次成型时,一般是依靠模具上设置金属接插头定位孔,将接插头插入定位孔来固定内模。对于高精度的产品来说,在注射过程中,受注射压力的影响,内模会发生窜动,导致成型出来的产品,尺寸精度无法保证。为此通过增加一套内模锁紧装置,有效地解决了该类模具的难题。

A foreign customer （BOSCH group） auto wire connector mould as an example. Discuss about this kind of product because the precision is too high, the customer must comply with the requirements of forming dimensions all qualified after acceptance. And we know the auto wire connector molding is two times molding, first molding mould incrustation. Also do not consider the final shape, fixing the wire and the metal plug with plastic molding to make of internal model. Then, the internal model is placed in the forming die for the secondary injection molding, complete the finished product. At present, the traditional process of two times molding, it generally relies on setting orientation hole for metal plug on the mold, then insert metal plug into orientation hole to fix internal model. For high precision products, in the injection process, influence the injection pressure, the internal model will traverse, resulting in forming out of the products, size precision can not be ensured. By adding a set of internal model fixation device, effectively solves the hard question for this kind of mold in this paper.