Abstract This design on the analysis of the structure of lamp shade,and puts forward the mold design key points,designed the overall structure of the mold. According to the plastic pieces of parting surface,designed the push plate and the inclined plunger, the introduction of the structure,part uses the double parting surface point gate, improve the quality of the parts outside of the. Through to the plastic parts for process analysis and structure analysis,from the product structure craft,specific die structure, the mold of gating system,molding part of the structure,the ejection system, selection of injection machine and related parameters of checking all have detailed design. The mold one module and four cavities,adopts the thimble ejection structure. Through production verification,the die structure is reasonable,reliable operation.
主要符号表 k 安全系数 E 材料弹性模量 Smax 塑料的最大收缩率 q 熔融塑料在模腔内的压力 Smin 塑料的最小收缩率 V塑 塑件体积 P0 注射压力 V注 注射机理论注射量 P公 公称注射压力 F锁 锁模力 Δs 塑件公差 δs 塑件收缩引起的塑件尺寸误差 T 注射机的额定锁模力 LS 塑件尺寸 L凹 型腔尺寸 L凸 型芯尺寸 H塑 塑件內形深度基本尺寸 S 注射机最大行程 d 塑件外径基本尺寸 H 模具闭合尺寸 D 塑件內形基本尺寸 Hmin 模具最小尺寸 h 凸模/型芯高度尺寸 Hmax 模具最大尺寸 δ 模具制造公差 α 倾斜角 A 塑件包紧型芯的侧面积 p 单位面积塑件对型芯的正力 F 塑件的投影面积 n 个数 P 型腔压力 f 摩擦系数 φ 长度系数 Q 总脱模力