医疗探头外壁管长型芯顶出侧脱模模具设计  

Design of side demolding ejection mold with long core for the outer pipe of the medical probe

作　　者：王平全[1] WANG Pingquan

机构地区：[1]广东省技师学院,广东惠州516100

出　　处：《模具技术》2021年第4期22-26,共5页Die and Mould Technology

摘　　要：结合PET塑料注射成型特点,设计了一种两级式浇注系统对塑件模腔进行注塑,避免了塑件成型后浇口附近区域发白问题的产生。浇注系统的第一级采用侧浇口对二级环形流道进行浇注,第二级则通过环形流道对模腔的3个直浇口进行浇注,以满足塑件深壁模腔的充填需要。模具中,使用了一种顶出式滑块机构来实现塑件内壁的脱模,该机构通过推板将侧抽芯滑块机构从动模板上顶出,先完成塑件外壁的脱模,而后通过油缸驱动塑件内壁的成型零件中央镶件,实施侧抽芯,以完成塑件的完全脱模。实验结果表明:本模具浇注系统设计合理,脱模机构设置简洁,能降低模具加工制造成本。In the plastic part mold,a two-stage gating system was designed to inject the plastic part cavity based on the characteristics of PET injection molding,which avoided blanching problem near gate after plastic part molding.The first stage of the gating system uses side gate to pour the second stage annular runner,and the second stage uses the annular runner to pour the three direct gates of the mold cavity,so as to meet the filling needs of the deep wall mold cavity.In our mold,a kind of ejecting slider mechanism is used to demold the inner wall of the plastic part.The mechanism ejects the side core pulling slider mechanism from the template through the pushing plate.Firstly,the demolding of the outer wall of the plastic part was completed.Then,the central insert of the forming part on the inner wall of the plastic part was driven by the oil cylinder to demold the plastic part completely.The results show that the mold gating system of our design is reasonable,and the setting of demolding mechanism is simple.It can reduce the cost of mold manufacturing.

关 键 词：医疗塑件 长型芯 脱模 注塑模具 机构设计 

分 类 号：TG375[金属学及工艺—金属压力加工]