铝合金压铸件排气道减速结构的分析

Analysis of Deceleration Structure of Exhaust Port for Aluminum Alloy Die Casting

为保证压铸件品质,常采用真空压铸,但真空阀芯受铝液的惯性冲击力会失灵,影响真空度,使抽真空效果降低。针对某压铸件的排气系统,利用Anycasting软件进行模拟,发现铝液达到真空阀时速度接近68m/s,速度极高。通过在铝液到达真空阀前端增加减速结构以解决真空阀堵塞和断裂问题。

In recent years,in the production of die casting for some important parts,vacuum die casting is often used to exhaust the air in the mould cavity.However,the inertial impact force of liquid aluminium results in the valve core to fail,affecting the vacuum degree and leading to a un-satisfied vacuum effect.For the exhaust system of a die casting,Anycasting software was used to simulate the exhausting behavior in the mould.The results reveal that when molten aluminum reaches the vacuum valve,the very high speed is close to 68 m/s.The problem of vacuum valve blockage and fracture was solved by adding a deceleration structure to the front of the vacuum valve before molten aluminum reached the vacuum valve.