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日本汽车用铸铁件和铸铝件的重量各占全国铸件总产量的45％和76％,铸件产量随汽车产量的递增而递增。 为了提高汽车的安全性和减少燃料消耗,对汽车发动机等重要部件的设计与制造需要不断地改进,迫使铸件生产投入更多的技术力量,从而促进了铸件生产技术的发展。 日本生产气缸体采用垂直分型工艺,与欧美采用的水平分型相比,可以减少清砂作业量及提高铸件的精确度。为减轻发动机重量,气缸体大多由铸铁件改为铸铝件。目前常用的气缸体铝压铸工艺有低压(模压压力为0.03MPa)、中压(压力为5～
Japan’s automotive cast iron parts and cast aluminum parts account for 45% and 76% of the total castings nationwide, and the output of castings increases with the increase of automobile output. In order to improve the safety of vehicles and reduce fuel consumption, the design and manufacture of important components such as automobile engines need to be continuously improved, forcing casting production into more technical force, thereby promoting the development of casting production technology. Japan’s production of cylinder body using vertical parting process, compared with the level of Europe and the United States using the type, you can reduce the amount of sand cleaning and improve the accuracy of the casting. In order to reduce engine weight, most of the cylinder block is changed from cast iron to cast aluminum. At present, the commonly used cylinder body aluminum die-casting process has low pressure (molding pressure 0.03MPa), medium pressure (pressure 5 ~