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低压铸造法得到发展的背景之一是在汽车水冷气缸盖的生产上得到应用。低压铸造能铸出形状复杂,壁厚变化大的铸件。所以国际上绝大多数厂家均采用低压铸造生产水冷气缸盖。特别是石油危机以来,铝合金的价格上涨。低压铸造法的金属利用率高,显示了它的优越性。当然也还存在着许多有待解决的问题。在浇注方案上有限制。因此,要选择能够向着浇口定向凝固的铸件和设定浇口的位置。浇口部位必须最后凝固,其凝固时间要很长,并且,为了得到完美的铸件,浇口要有足够的长度。
One of the background to the development of low-pressure casting is its application in the production of automotive water-cooled cylinder heads. Low-pressure casting can cast a complex shape, wall thickness changes in large castings. Therefore, the vast majority of international manufacturers are using low-pressure casting production of water-cooled cylinder head. Especially since the oil crisis, aluminum prices have risen. Low-pressure casting method of metal utilization, showing its superiority. Of course, there are still many problems to be solved. There are restrictions on the casting program. Therefore, you have to choose the direction of solidification can be poured toward the gate and set the location of the gate. The gate must be finally solidified, the solidification time to be very long, and, in order to get the perfect castings, the gate should have a sufficient length.