打印机骨架复杂分型三板模结构设计

Structural Design of Three-plate Complex Mold for Printer Framework

针对塑件形状复杂,模具设计困难的问题,设计了一种1模1腔三板注塑模具;塑件分型采用双层分型,浇注采用三点点浇口浇注。针对塑件多特征多向脱模的需要,设计了6个滑块抽芯机构和3个斜顶机构来实施脱模;滑块抽芯机构中,将滑块机构中的滑块的驱动改进为外置式弹簧驱动方式,将斜向抽芯机构改进设置为水平滑块驱动隧道滑块斜向抽芯的方式,以降低机构对模具的过大的结构尺寸要求,从而降低制造成本和加工、装配难度;设计了一种新型前模斜顶机构,机构利用弹簧驱动斜顶座来驱动斜顶杆将塑件从型腔中顶出,从而达到实现塑件弯钩特征及孔特征在前模侧向抽芯脱模的目的。模具中,机构设置简单实用,工作可靠性高,有效简化了模具的整体结构和加工制造难度。

Aiming at the difficulty in mold design for the complex shape of plastic parts,we reported a design for the injection mold with one mold,one cavity and three plates.A two-layer parting mode and a 3-point gating system were adopted for the plastic parts.Aiming at the requirement for the mufti-feature and multi-purpose demolding of plastic parts,six slider core-pulling mechanisms and three inclined top mechanisms were designed to conduct the demolding action.In the slider core-pulling mechanism,the slider-driving mode in the slider mechanism was modified to the external spring-driving one,and the oblique core-pulling mechanism was modified to the horizontal slider driving tunnel slider oblique core-pulling mode.Such a design effectively reduced the excessive structural size requirements of the mechanism to the die,and therefore reduced the manufacturing cost and overcame the difficulties in processing and assembly.A new type of oblique-top mechanism with a front die was designed,in which a spring was used to drive the oblique-top rod to eject the plastic parts from the cavity.This design realized the side core pulling and demolding in the front die with the characteristics of bending hook and hole.The mechanisms designed by this work are simple and feasible for the injection mold,and their working reliability is high.Our design effectively simplifies the overall structure of the mold and makes the processing and manufacturing much easier.