Casting mold coating and preparation method thereof

Abstract

The invention provides casting mould coating. The casting mould coating is divided into bottom layer coating which coats the surface of a casting mould and outer layer coating which coats the surface of the bottom layer coating. The bottom layer coating and the outer layer coating each at least comprise refractory aggregate, adhesives and suspending agents, the main ingredients of the refractory aggregate contained in the outer layer coating are different from those of the refractory aggregate contained in the bottom layer coating, preferably, the refractory aggregate in the bottom layer coating simultaneously comprises zircon powder, titanium oxide, silicon carbide and kaolin, and the refractory aggregate in the outer layer coating simultaneously comprises mullite powder, bauxite clinker, talcum powder and silicon carbide. The casting mould coating is reasonable in ingredient collocation, the selected refractory aggregate of the casting mould coating can achieve a sufficient heat insulation effect, and can be well stripped after casting, and the refractoriness of the bottom layer coating and the refractoriness of the outer layer coating are matched in different levels so that the effect of the coating property can be achieved maximally.

Description

technical field [0001] The invention relates to an auxiliary material for casting and a preparation method thereof, in particular to a casting coating and a preparation method thereof. Background technique [0002] Coating a layer of paint on the working surface of the mold (including the core) can effectively prevent and reduce defects such as sand sticking and sand inclusions on the surface of the casting, reduce the surface roughness of the casting, and improve the surface quality of the casting. It can be said that the quality of the casting coating It is the most direct factor related to the dimensional accuracy of castings. There are many types of commonly used casting coatings, which can be basically divided into two categories according to different dilution carriers-water-based coatings and alcohol-based coatings. Water-based coatings refer to coatings dispersed in water as a dispersion medium, and alcohol-based coatings refer to coatings dispersed in alcohol as a ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art such as irrational matching of paint components, monotonous layers, and the inability of the traditional coating method to exert the maximum effect of the paint, the present invention proposes a new type of casting paint and a preparation method thereof. The paint composition and layers are reasonable , scientific coating, can exert the maximum effect of the coating, and has certain applicability to various casting molds, especially for sand casting of large or precision steel castings, effectively preventing defects such as sand sticking, sand inclusions, and protrusions of castings, and improving Surface Quality of Castings