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据美国专利报导,美国发明了一种使用易清砂芯的压铸方法。这种砂芯特别适用于具有复杂侧凹的压铸件生产,因为它具有良好的落砂性、抗金属液冲蚀性和抗表面渗透性。
According to U.S. patents, the United States invented a die-casting method that uses a clear core. This sand core is particularly suitable for the production of die-castings with complex undercuts because of its good sanding properties, resistance to liquid metal erosion and resistance to surface penetration.