铝合金链条盖压铸模冷却系统的优化设计

Optimum Design of Die-Casting Die Cooling System for Al Alloy Chain Cover

发动机链条盖局部厚壁部位,压铸生产过程容易产生热节、缩孔、烧伤、扣伤等缺陷,导致大量废品产生。如模具冷却方案采用的是直冷或点冷的方式,冷却水与压铸模具的接触面积小,带走的热量少,导致热节厚壁部位降温不足。介绍了一种创新的仿形冷却方案,大大提高了冷却效果,使综合废品率由原来的12%降到4%以内。

During die-casting and producing, parts of the engine chain cover with thick-wall are easy to induce defects such as hot joint, shrinkagecavity, burn, damage caused bybuckling, etc., leading to a large number of waste products. If direct cooling or point cooling is used to cool the model, the contact area between the cooling water and the die-casting die is small and takes away less heat, which results in that the temperature of hot joints with thick-wall can't be reduced sufficiently. This paper introduces an innovative profiling cooling plan, which greatly improves the cooling effect and reduces the comprehensive rejection rate from 12% to less than 4%.