Low-pressure fusible mold precise casting process
A technology of investment precision casting and technology, which is applied in the field of metal casting, can solve the problems of casting pore defects, resin consumption, molding sand collapse, etc., and achieve the effects of reducing production costs, good bonding performance, and low thermal conductivity
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[0035] Such as Figure 1 to Figure 13 As shown, the low-pressure investment precision casting process of the present invention includes the following steps in turn: (1) placing the molding steel plate 7 on a flat ground, placing a sand box 9 on the molding steel plate 7, and placing the combined mold shell 8 on the molding steel plate 7 In the center hole of the composite shell 8, from top to bottom, the combined shell 8 includes a thin-walled product shell 8a, an ingate shell 8b, a runner shell 8c and a sprue cup shell 8d. The sprue cup shell 8d is a bell mouth with a small top and a big bottom. The upper port of the sprue cup shell 8d is connected to the center of the runner shell 8c and communicates with each other. Each end of the runner shell 8c is horizontal. Symmetrically extending outward, the upper ends of the runner shells 8c are respectively connected to the lower ports of the ingate shells 8b and communicate with each other, and the upper ports of each ingate shell...
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