端盖双滑块+斜顶3次复合抽芯机构注射模设计

Design of Injection Mold with Compound Core Pulling Mechanism for End Cover

针对塑件注射成型自动化实施困难问题,设计了一副单点潜浇口、两板式2次开模注射模来解决这一难题。模具布局为1模2腔。模具中单腔的机构设置情况为:(1)定模侧,设计了一个油缸驱动的定模顶出机构;动模侧,设置了2个特殊的斜顶+滑块复合机构、1个万能斜顶机构、1个隧道滑块机构、及1个顶针顶出机构;(2)定模顶出机构由油缸驱动定模顶出板以驱动6根斜顶杆来对6个倒扣特征进行自动脱模;(3)2个特殊的复合机构分别为:双滑块+斜顶3次复合抽芯机构、单滑块斜顶两次抽芯机构;此2个机构的作用是,通过斜导柱驱动滑块,从而2次驱动滑块内的斜顶实施2次抽芯,来到达塑件局部区域多次多向抽芯的目的;(4)机构中,使用万能斜顶机构能有效减小模具高度尺寸;使用隧道滑块斜抽芯机构,动模一侧增加1次模板开模打开来驱动隧道滑块实施斜抽芯,能有效利用模具开模动力,降低模具制造成本。

Aiming at the difficulties in performing the injection molding automation of plastic parts,a pair of single point submerged gate and two-plate twice-open mold injection mold were designed.The mold layout was set as one mold with two cavities.The single cavity mechanism in the mold was set as a fixed mold side with a fixed mold ejection mechanism driven by oil cylinder.On the side of the moving mold,there were two special compound mechanisms with an inclined roof and a slider block,a universal inclined roof mechanism,a tunnel slider block mechanism and an ejector pin ejection mechanism.The ejector mechanism of the fixed mold was driven by the oil cylinder to drive the fixed mold ejector plate to drive six inclined ejector rods to demold the six inverted buckle features automatically.Two special composite mechanisms were designed to be composed of a double slider with an inclined roof three times composite core pulling mechanism and a single slider inclined roof two times core-pulling mechanism.The function of these two mechanisms was to drive the slide block through the inclined guide pillar so as to drive the inclined top in the slide block to implement the secondary core pulling for the purpose of multiple multi-directional core pulling in the local area of the plastic part.In this mechanism,the use of universal inclined roof mechanism can effectively reduce the height and size of the mold.Moreover,by using the tunnel slider inclined core-pulling mechanism and adding a template opening by the side of the moving mold to drive the tunnel slider to implement inclined core pulling,the mold opening power can be utilized effectively,and the mold manufacturing cost can be reduced.