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美国通用汽车公司采用了 Acurad 压铸法。它的优点是所生产的压铸件的致密度比普通压铸法生产的高3～5%;所生产的压铸件没有缩孔和气孔,金相组织、焊接性和热处理性良好。Acurad 压铸法的特点如下:1.浇口较厚;2.采用低的压射速度;3.使用副压射活塞;4.控制压型的冷却。一、浇口的设计Acurasd 压铸法采用的浇口较厚。通用汽车公司生产的某些压铸件,其浇口的厚度约为5/8时。
US General Motors used Acurad die-casting method. Its advantage is that the density of the die casting produced is 3 to 5% higher than that of ordinary die casting. The die castings produced do not have shrinkage holes and pores, and the metallographic structure, the weldability and the heat treatment property are good. Acurad die casting method is characterized by the following: 1. The gate is thicker; 2. The use of low injection speed; 3. The use of sub-injection piston; 4. Control of the type of cooling. First, the gate design Acurasd die casting method used thicker gate. Some GM castings have a gate thickness of about 5/8.