净化器骨架模具带顶针滑块机构结构设计  

Structural Design of Slider Mechanism with Side Ejector for Injection Mold of Purifier Framework

作　　者：温瑞[1] 路英华[1] WEN Rui;LU Yinghua(Modern Mould School Zhejiang Business Technology Institute, Ningbo 315012, China)

机构地区：[1]浙江工商职业技术学院现代模具学院

出　　处：《中国塑料》2019年第9期109-115,共7页China Plastics

摘　　要：介绍了净化器骨架塑件的一模一腔三板模注塑模具结构设计,模具中,模腔的浇注采用5点点浇口进行浇注,冷却采用水井+管道方式进行冷却,塑件的完全顶出采用一种改进型柱体方头型顶杆来顶出。针对塑件脱模困难的问题,对侧边特殊特征的脱模,设置了两种抽芯机构来进行抽芯脱模,一种为滑块顶针复合式二次抽芯机构,一种为弯销滑块抽芯机构,滑块顶针复合式二次抽芯机构巧妙地在侧滑块上设置了延时顶针,通过利用定模上的推杆挡块来对顶杆进行延时顶出,先保证侧面成型块先抽芯,然后滑块上的侧面顶针再抽芯的方式,避免了因一次性侧面抽芯时容易导致塑件脱模时的变形。机构结构设计精巧,模具结构设置合理,能为同类塑件的模具设计提供有益参考。This paper reported a structure design of injection mold with one mold, one cavity and three plates for the plastic part of purifier framework. In this mold, the mold cavity was designed with a 5-point gate, and the cooling system was designed with cooling water wells and pipes. The full ejection of plastic parts was arranged by an improved cylinder head type ejector pin. Aiming at the difficulty in demolding of plastic parts, two types of core-pulling mechanisms were set for demolding with a characteristic side edge, in which one was a compound secondary core-pulling mechanism of slider ejector and another was a bending pin slider core-pulling mechanism. A delay ejector on the side slider was set in the compound secondary core-pulling mechanism of slider ejector needle, and a push rod block on the fixed mold was designed in the ejector rod. The delayed ejection ensured the core-pulling of the side forming block at first and then the core-pulling of the side ejector pin on the slider. Such a design avoids the deformation of plastic parts when the side core-pulling is one-off. The structure design of this mechanism is exquisite and the structure of the mold is reasonable. This may provide a useful reference for the design of mold for the plastic parts with the same structures.

关 键 词：注塑模 三板模 延时顶出 滑块机构 结构设计 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]