基本解释：加装砂心
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Point to these problems such as sand leak and air leak as well as wear of seal loop that occurred in the sand feeding devices for resin-coated sand core shooting machines,the structural improvement of the sand feeding devices for various core shooters was carried out.介绍了热芯盒射芯机加砂装置在使用覆膜砂时出现的漏砂、漏气和密封圈磨损等缺陷,对不同类型射芯机加砂装置进行了结构改进,设计了上压式活塞加砂装置和下拉式活塞加砂装置;经实际应用,得到了良好的效果;并对直线移动射头和回转射头进行了改进,在生产中得到应用。
