基于ZWCAD的奶瓶盖多腔螺纹抽芯注塑模设计  

Design of Injection Mold with Multi-cavity Thread Extracting for Milk Bottle Cap Based on ZWCAD

作　　者：邵树锋[1] 林占强 Shao Shufeng;Lin Zhanqiang(Zhejiang Industry Polytechnic College,Shaoxing 312000,China;Sanmen Technician Institute,Taizhou 317100,China)

机构地区：[1]浙江工业职业技术学院,浙江绍兴312000 [2]三门技师学院,浙江台州317100

出　　处：《工程塑料应用》2020年第9期92-97,共6页Engineering Plastics Application

基　　金：浙江省自然科学基金项目(501096)。

摘　　要：针对奶瓶盖的结构特点,设计了一副1模8腔改进型三板注塑模具来进行大批量自动化注塑生产,模具工作时,有5次分型打开。在模具的单腔中,设置偏心单点点浇口对模腔进行注塑,以保证瓶盖盖体和盖帽的平衡注塑;通过设置一种油缸+齿条驱动的齿轮螺纹型芯机构来实现8个模腔内塑件内螺纹脱模的同步进行,保证塑件的内螺纹脱模起始点的一致性。脱模时,盖帽通过定模顶出机构从型腔内先行顶出脱模;盖体使用1个内螺纹脱螺纹机构对盖体的内壁、外壁分2步实施脱模,第1步为内壁的内螺纹脱模,第2步为内壁筋位、外壁的顶出脱模。为了配合机构件的动作需要,模架由普通3板模架改进为6板模架,以保证机构件动作的执行。According to the structural characteristics of the milk bottle cap,an improved three plate injection mold was designed with one mold and eight cavities to carry out large-scale automatic injection production.When the mold works,there are five parting openings.In the single cavity of the mold,a single eccentric point gate was set to inject the mold cavity to ensure the balanced injection of the body and cover of bottle cap.By setting an internal thread demoulding mechanism driven by the hydrocylinder+rack,the simultaneous demoulding of the internal threads of the plastic parts in eight mold cavities was realized,so as to ensure the consistency of starting point of internal thread demoulding of plastic parts.During demoulding,the cover of bottle cap is first demoulded from the mold cavity through the fixed mold ejection mechanism,the body of bottle cap uses an internal thread demoulding mechanism to demould its inner wall and outer wall,and the mechanism’s actions follow in two steps:the first step is the internal thread demoulding of the inner wall,and the second step is the ejection demoulding both of the inner wall reinforcement and outer wall.To meet the action needs of mechanism parts,the mold base was improved from common 3 plates mold base to 6 plates mold base,so as to ensure the execution of the action of mechanism parts.

关 键 词：注射模 多腔成型 结构改进 脱模 脱螺纹 

分 类 号：TQ320.52[化学工程—合成树脂塑料工业]