Cast iron evanescent mode paint and preparation method thereof

Abstract

The invention discloses cast iron evanescent mode paint, which is prepared from the following raw materials in parts by weight: 0.1-15 parts of aluminum oxide, 0.1-10 parts of ferric oxide, 5-30 parts of silicon dioxide, 2-20 parts of bauxite, 10-50 parts of silica sand, 2-15 parts of zircon power, 0-10 parts of silicon carbide, 0.5-10 parts of potash feldspar, 0.1-5 parts of silica sol, 1-5 parts of bentonite, 0.1-8 parts of attapulgite, 0.01-5 parts of lithium magnesium silicate, 0.01-1 part of sodium pyrophosphate, 0.1-8 parts of talcum powder, 1-5 parts of a white emulsion, 0.1-8 parts of xanthan gum, 0.1-5 parts of a BY binder, 0.1-5 parts of CMC, 0.01-1 part of sodium benzoate and 30-200 parts of water. The paint has the excellent property; a coating is tightly combined with an evanescent mode model, so that the casting precision and the invariance invariant are ensured; the coating is slightly sintered at a high temperature; and a very small air hole is formed in the surface, so that the timely elimination of gas generated by thermal decomposition of synthetic resin can be effectively ensured; and the internal defects are reduced.

Description

technical field [0001] The invention relates to the technical field of casting coatings, in particular to a cast iron lost foam coating and a preparation method thereof. Background technique [0002] With the rapid development of the foundry industry, large-scale casting and precision casting are increasing day by day, and the size and internal defect control of castings are becoming more and more strict. In addition, the concept of environmental protection is deeply rooted in the hearts of the people, and higher requirements are put forward for the environmental protection of the foundry industry. [0003] Traditional casting is generally sand casting, and the production process requires a large amount of resin sand and water glass sand, and most of the molding sand is resin sand. In the production process, the molding sand is difficult to recycle and reuse, the noise is loud during production, and a large number of core boxes are required when the casting is complex; the f...

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Problems solved by technology

[0006] The invention provides a cast iron lost foam coating and a preparation method thereof, which can solve the problems of many internal defects of castings, severe sticky sand at risers or places with complex shapes, and high reject rate when applying the lost foam coating of small castings to large castings. The problem of low cost performance of lost foam coatings for large castings

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