Precision casting technique of ceramic shell lost foam
A technology of precision casting and lost foam, used in manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of inability to produce steel castings, generation of pores in castings, low strength, etc., to achieve high strength, avoid casting pores, The effect of reducing the number of layers
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[0012] The ceramic shell lost foam precision casting process described in the embodiment of the present invention includes the following steps:
[0013] (1) The bead-shaped raw and auxiliary materials that have passed the inspection are injected into the mold cavity after being foamed once by a foaming machine, and the model is formed by expansion under the action of high-temperature steam. After fully drying and shaping under the condition of 40%, it is assembled and welded with spray glue and hot melt glue to form a module composed of ceramic powder and silica sol, that is, a complete model of lost foam is formed;
[0014] (2) Coat the surface of the module with refractory material to obtain sufficient strength. After the temperature of the roasting furnace rises to 1000°C, put the pre-baked module into the furnace for roasting in the shortest time, and then Drain the remaining water and gas to avoid the formation of pores;
[0015] (3) Provide conditions for negative press...
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