弯曲形冷却水道型芯的设计与探讨

Design and discussion on core for curved cooling water channel

模具内腔的冷却水道按传统工艺只能布置成直线形,如果型腔是复杂曲面,直线冷却水道离型腔外表距离不一,冷却效果会不均匀,这是模具工艺长期无法解决的难题。对此,提出采用任意曲线形冷却水道,以期能最大限度保证冷却均匀。曲线水道不能钻孔,故采用快速成形法烧结成形;同时,为了承受注塑高温,在烧结成形的材料中混入铁粉。采用此方法完成了弯曲形冷却水道的模具设计。

Cooling water channel of mold cavity is generally arranged in a straight li to the traditional craft. If the cavity is a complex surface, then the straight coolin the appearance of the cavity different, which results in uneven cooling effect. To th process cannot be solved for a long term. This paper presents an arbitrary curved c channel to ensure extremely cooling evenly. For curve lines cannot be drilled, it ne according g channel to at, the mold ooling water is suggested that only rapid prototyping method and sintering. For the rapid sintering molding material can not withstand high temperature when injection molding, we mixed the iron powder into the sintering material powder. By this method, the design for die of curved cooling cannel is completed.