近几年来,冷芯盒造芯工艺在国内外获得了较快的发展。但是,由于热芯盒造芯对提高产品质量、改善劳动条件和提高生产效率起着良好的作用,它仍然是一种造芯的主要工艺方法。我厂采用筒形铸造方法生产207活塞环(包括气环和油环),其泥芯如图1所示。原工艺为粘土砂潮芯,产品质量很不稳定,加工后出现多量的砂孔和气孔,造成报废。1979年4月开始,改为热固性树脂机械化造芯,铸件质量有了显著提高。设计热芯盒造芯,一般包括泥芯设计和工装设计。热芯盒造芯不同于一般的粘土砂和其他有机粘结剂砂造芯,首先是粘结剂价格贵,其次是适合机械化生产。因此,在采用热芯盒生产时,除要考虑泥芯的几何形状 In recent years, cold-core box core technology at home and abroad have achieved rapid development. However, since core-box construction plays a good role in improving product quality, improving working conditions and increasing production efficiency, it is still a major process for making cores. I plant the use of cylindrical casting method of producing 207 piston rings (including gas ring and oil ring), the mud core shown in Figure 1. The original process for the tide of clay sand tide, the product quality is very unstable, after processing a large number of sand holes and pores, resulting in scrapped. Starting in April 1979, thermomechanical resin core instead, casting quality has been significantly improved. Design hot box core, generally include mud core design and tooling design. Hot core box core is different from the general clay sand and other organic binder sand core, the first is the expensive binder, followed by the mechanized production. Therefore, in the use of hot-box production, except to consider the geometry of the mud core