端盖热固性SMC压注成型模具设计

Side Cover Thermosetting SMC Injection Mold Design

结合塑件采用改性塑料合金(SMC)材料压注成型的需要,设计了其一模一腔单分型面注塑模具。模具的浇注系统采用压室+边侧浇口形式进行浇注;流动末端采用溢流槽、排气槽进行溢流和排气;成型件采用整体镶件形式。模具的加热和冷却采用共管道形式;浇注系统加料室及成型零件的加热采用蒸汽加热方式;模具的冷却采用水冷方式;冷却构件采用直通管道式、套管点式、螺旋塔式、环包式等四种类型结构进行冷却。为增强排气,流动末端设置了2个风琴式排气块,以便于溢出边废料的清理;针对侧孔的脱模设置了1个斜导柱滑块侧抽芯机构来实现侧孔特征的脱模。模具结构布局合理,冷却构件及排气构件简单合理,可为同类塑件的模具设计提供有益参考。

Combined with the need of plastics injection molding by SMC materials, one module with one cavity was designed for single parting surface injection mould. The mould gating system adopted pressure chamber plus side gate form pouring, and the mobile terminal used overflow trough and vent to overflow and exhaust. The finished parts adopted the form of integral inserts. The mold was heated and cooled in a common pipe. The feeding chamber and the molded parts of the pouring system were heated by steam; the mold was cooled by water cooling; the cooling components were cooled by four types of structure, such as straight pipe, casing point, spiral tower and ring package. In order to enhance the exhaust, two organ exhaust blocks were arranged at the end of the flow to facilitate the cleaning of the overflow waste. A side core pulling mechanism of inclined guide column slide block was set up for side hole demoulding to realize side hole demoulding. The layout of mould structure is reasonable, and the simple and reasonable cooling component and exhaust component can provide beneficial reference for the mould design of similar plastic parts.