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随着塑料工业的迅速发展,塑料制品的形状日趋复杂,生产自动化程度要求更高,塑料制品模具两级顶出机构的应用也日益广泛。采用两级顶出机构顶出时,两组顶出器的行程必须有差别,行程大的顶出器的动作不能早于另一顶出器。根据这个条件,目前塑料模具中经常采用的几种两级顶出结构有:型腔结合弹簧式、油缸或气缸顶出式、顶板滑块式、U 形限制架式、活动摆块式、摆块拉板式、钢球式、拉杆式。以上结构均采用单组顶出板结合其它元件进行两级顶出。采用两组顶出板的
With the rapid development of the plastics industry, the shape of plastic products is becoming more and more complicated, the degree of automation of production is more demanding, and the application of plastic body mold two-stage ejector mechanism is also increasingly widespread. When ejecting with two-stage ejector mechanism, the stroke of two ejectors must be different. The ejector with large stroke can not move earlier than the other ejector. According to this condition, several kinds of pop-up structures often used in plastic molds are: cavity combined with spring type, cylinder or cylinder top type, top slide type, U-shaped limit type, movable pendulum type, pendulum Block pull plate, steel ball, rod type. The above structure is a single set of top plate combined with other components for two-stage ejection. With two sets of the top plate