Slurry molding casting technology for metal casting

Abstract

The invention relates to a slurry molding casting technology for metal casting. Metal casting is performed on slurry through extrusion molding, the slurry is prepared from modeling powder, an adhesive, a reinforcing agent and water. The modeling powder is selected from mullite powder or aluminum oxide powder or silica powder or talcum powder or similar modeling and refractory material powder; themesh size of the modeling powder is larger than or equal to 200. A casting is good in dimensional stability, high in precision, capable of easily achieving near-net forming products (capable of achieving or approaching the surface quality of the casting of the silicon sol fired mold casting technology); no coating needs to be brushed to the surface of a mold shell; regeneration is simple, and thecomprehensive cost is low; the production procedures are simple and controllable; the technology is close to zero release and is environmentally friendly; a production line can be arranged, the automatic degree is high, and the period is rapid.

Description

technical field [0001] The invention relates to molding casting technology, in particular to a mud molding casting process for molding casting. Background technique [0002] Sand casting is to use sand to make molds. Sand mold casting needs to put the finished part model or wooden model (pattern) in the sand, then fill the sand with sand on the weekend of the pattern, and take out the pattern after opening the box to form the mold. In order to take out the model before casting the metal, the mold should be made into two or more parts; during the mold making process, holes and vent holes for pouring metal into the mold must be left to form a pouring system. After pouring the liquid metal into the mold, keep it for an appropriate time until the metal solidifies. After the parts were removed, the molds were destroyed, so new molds had to be made for each casting. [0003] Among the current casting molding methods, sand casting, silica sol investment casting, water glass inve...

AI Technical Summary

Problems solved by technology

[0004] ① Except for the high precision of silica sol investment casting, the surface finish of castings produced by other processes is not high;

[0005] ②The surface dimensional accuracy of the casting is low, and the dimensional stability is poor. The silica sol investment molding process has high dimensional accuracy on small parts, and the deformation of slightly larger parts is serious;

[0006] ③There are many production processes and a long cycle;

[0007] ④ It is difficult to regenerate old sand (except Bonney and furan resin sand), and the overall cost is high;

[0008] ⑤ Large VOCs and solid waste emissions, poor environmental protection;

[0009] ⑥ The degree of automation is not high

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