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干型造型在合箱过程中,通常需要在合箱后,打开上型检查泥芯和铸型的分型面是否压严实;气眼是否对准;铸型是否压坏;确定泥芯撑高度等,这一步骤称验箱(三检一定),俗称试盖或预扣箱。为了保证铸造质量,中大型铸件或复杂铸件在合箱过程中,常常需要验箱。 1.检查泥芯和铸型分型面是否压严实如果泥芯未压实,金属液钻入气眼,会发生呛火,导致铸件产生气孔、砂眼、夹杂等缺陷;砂型外型未压实,浇注时金属液从分型面流出,可能产生铸件浇不足、对火、渣孔、砂眼、夹砂等缺陷。如果分型面压的过实,压
Dry molding in the box together, usually need to open the box after the box, check the mold core and the mold parting surface is tight; whether the alignment of the eye; whether the mold is crushed; to determine the height of the mud core support And so on, this step called inspection box (three seized a certain), commonly known as test cover or button box. In order to ensure the quality of casting, medium or large castings or complex castings in the box process, often need to test box. 1. Check the mud core and the mold parting surface is tight If the core is not compacted, molten metal into the eye, will choke fire, resulting in casting porosity, trachoma, inclusions and other defects; sand shape is not compacted , Pouring liquid metal from the sub-surface outflow, casting may have insufficient, the fire, slag hole, trachoma, sand and other defects. If the surface pressure is too high, pressure