论文部分内容阅读
一、模具强度设计中应尤予注意的一些问题在模具型腔内,因注射内压的作用而产生强大的应力,当产生的变形已影响到注塑件的充填性及质量时,注射模具即已损坏,因此需要事先认真加以研究。 1.模具侧壁的挠度若设负荷支点间的边长为l,壁厚为h,则箱形模腔侧壁的挠度量以(l/h)~3对l的倍数按比例增大。为要使较大型腔的挠度量最小,最好采用如图1(a)所示的底部整体形;为使框形底部可拆卸,常设计成如图1(b)、(c)那样的组合式结构,以增强模腔强度。同样也有
First, the mold strength design should pay particular attention to some of the problems in the mold cavity, due to the role of the injection of internal pressure and have a strong stress, when the deformation has affected the filling of injection molding and quality, the injection mold that Have been damaged and therefore need to be carefully studied in advance. 1. Mold sidewall deflection If the load is set between the fulcrum of the side length l, the wall thickness of h, the box side wall of the deflection of the amount of (l / h) ~ 3 multiples of l increased proportionally. In order to minimize the deflection of larger cavities, it is preferable to use a bottom integral shape as shown in Fig. 1 (a). To make the frame bottom detachable, it is often designed as shown in Figs. 1 (b) and Combined structure to enhance cavity strength. The same is true