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通过实施“珠粒选择、预先发泡、干燥熟化、模型制作、模型烘干、联接组合、沾涂烘干、组合拆分、干砂振实、负压抽吸、负压浇注、取出清理”等工艺方案,不仅解决了摩擦盘在铸造生产过程中消失模模型的珠粒选择不恰当和模型强度不足、发气量大、变形大所造成的铸件表面存有孔隙及尺寸不合格等问题,而且还解决了摩擦盘铸件模型燃烧不充分、铁水充型不稳定、铁水凝固不均衡、保压时间不足造成的铸件内部形成渣孔、缩松、缩孔等问题。采用变负压消失模工艺方法生产出的摩擦盘产品,品质稳定,工艺出品率高。
Through the implementation of “bead selection, pre-foam, dry aging, model making, drying the model, the combination of connection, James drying, combination of split, dry sand Zhenzhai, vacuum suction, negative pressure pouring, ”And other processes, not only solved the friction disc in the casting process of the EPC model of the inappropriate selection of beads and model strength is not enough, a large amount of gas, large deformation caused by the casting surface porosity and size problems such as unqualified , But also solve the friction disc castings model is not fully burned, molten iron filling instability, uneven hot metal coagulation, pressure retention time caused by the formation of slag inside the casting hole, shrinkage, shrinkage and other issues. Friction plate products produced by the process of changing negative pressure to eliminate foam die have stable quality and high production rate.