对压铸模二次推出机构的探讨

Probe into the twi-ejecting mechanism of die-casting mould

如果说浇注系统的合理与否关系到铸件的成形质量，那么推出机构的设计合理与否从某种意义而言将直接关系到模具的成败。有些压铸件看似简单，但无法应用一次推出实现，必须采用二次推出，但应指出，采用二次推出机构是不得已而为之，模具设计时全推杆一次推出机构仍然是我们的首选。

As we all know the pouring system decides the quality of the diecastings,and the ejecting mechanism decides the success of the diecasting. Some diecasting is very simple ,but it must he manufactured by the secondary ejecting mechanism pressure-casting die and cannot do it by the once ejecting mechanism pressure-casting die. But we do our best to use the once ejecting mechanism pressure-casting die instead of the secondary ejecting mechanism pressure-casting die when we design the casting die.