Molding sand and preparation method

Abstract

A moulding sand is prepared from zircon sand (or powder), graphite powder and water glass through proportionally and sequentially mixing. Its advantages are high surface quality of casting mould and high refractory performance.

Description

technical field [0001] The invention relates to a special casting surface sand in the foundry industry and a preparation method thereof, in particular to a modeling material and a preparation method of artistic castings with high requirements on surface quality and complicated surface decorations. Background technique [0002] Due to the particularity of the shape of artistic casting products, ordinary water glass sand is often used in traditional crafts to make casting sand. Although ordinary water glass sand has the advantages of simple preparation, low cost, convenient operation, and easy molding, it also has shortcomings: First, the strength Castings that are not enough to make super-large artistic castings; secondly, the most important aspect of artistic castings—the surface quality, cannot meet the demanding requirements of its almost perfect appearance. Moreover, the castings made of this sand require a lot of rest work in the later stage, ...

AI Technical Summary

Problems solved by technology

[0002] Due to the particularity of the shape of artistic casting products, ordinary water glass sand is often used in traditional crafts to make casting sand. Although ordinary water glass sand has the advantages of simple preparation, low cost, convenient operation, and easy molding, it also has shortcomings: First, the strength Castings that are not enough to make super-large artistic castings; secondly, the most important item for artistic castings—the surface quality, cannot meet the demanding requirements of its almost perfect appearance

Moreover, castings made of this sand require a lot of rest work in the later stage, which greatly reduces the work efficiency of making artistic castings, and at the same time prolongs the production cycle to a large extent, wasting a lot of manpower and material resources.