含双头旋转脱模机构的车用电池组件盖注塑模设计

Design of injection mould with double-head rotating demoulding mechanism for a vehicle battery assembly cover

结合某车用电池组件盖塑件采用玻璃纤维改性聚醚醚酮自动化注塑的需要,针对该塑件中局部特征难以成型的问题,设计了一副含双头旋转脱模机构的注塑模具。模具中针对所使用改性材料流动性差而导致模腔充填存在潜在困难的问题,采用单一热浇口对模腔进行直接充填。针对塑件外表面成型后脱模困难问题,设计了5个侧抽芯滑块机构用于塑件外表面局部特征的成型与脱模,其中有2个侧抽芯滑块机构设计成二次抽芯滑块机构,有效地避免了侧抽芯时塑件局部特征的脱模变形和损伤。针对塑件圆弧面两侧都要实施旋转抽芯而圆弧形芯的驱动机构设计存在干涉导致机构设计难以进行的问题,设计了一种单油缸驱动双头旋转抽芯机构,机构中使用1个液压油缸通过两个传动滑块的改向动力传动,同步驱动了塑件圆弧面两侧两个圆弧滑块的同步抽芯,避免了驱动机构运动干涉问题。设计的模具为一种两板热流道模具,单次开模,保证了塑件的自动化注塑得以顺利进行。

Considering the need for automated injection molding of a vehicle battery assembly cover plastic part made from glass fiber modified polyether ether ketone,in response to the problem of difficult molding of local features in the plastic part,a injection mould with double-head rotating demoulding mechanism was designed.According to the potential difficulty in filling the mould cavity caused by the poor fluidity of the modified materials used in the mould,a hot gate was used to fill the mould cavity directly.In response to the problem of demoulding difficulties after forming the outer surface of the plastic part,five side core pulling slider mechanisms were designed for the molding and demoulding of local features of the outer surface of the plastic part.Among them,two side core pulling slider mechanisms were designed as secondary core pulling slider mechanisms,effectively avoid-ing demoulding deformation and damage to local features of the plastic part during side core pulling.The mechanism design was difficult to perform due to the interference in the design of the driving mechanism for the circular arc core of the plastic part,which requires rotary core pulling on both sides of the circular arc surface,in response to above problems,a single hydraulic cylinder driven double-head rotating core pulling mechanism was designed.In the mechanism,one hydraulic cylinder was used to drive the synchronous core pulling of two circular arc sliders on both sides of the circular arc surface of the plastic part through the redirection power transmission of two transmission sliders,avoiding the problem of motion interference in the driving mechanism.The designed mould was a two plate hot runner mould with a single opening,which could enable the automated injection molding of the plastic part to proceed smoothly.