A kind of repairing agent for solid casting foam model

Abstract

The invention discloses a mending agent for a full mold processed foam model. The mending agent is mainly composed of EPS foam powder, a binding agent and water which are mixed, and then are uniformly stirred so as to form paste. Compared with the prior art, the mending agent, formed by the EPS foam powder, the binding agent and the water which are mixed into the paste, has the advantages of being not easy to dissolve, being directly coated in a seam and a breakage part of the foam model, being convenient to operate, and improving the production efficiency.

Description

technical field [0001] The invention relates to a repairing agent for a solid casting foam model. Background technique [0002] At present, in the full mold casting process, EPS (polystyrene) foam is used as the pouring system in the casting process, and the foam model is made through EPS foam, and then the foam model is coated with refractory paint. After drying, the foam model is buried in the In the molding sand, the foam gasifies into gas during pouring of molten iron, and the molten iron fills the mold to form the contour size of the casting. [0003] After the foam model is made, due to the characteristics of the foam, it is easy to be bruised and damaged. For large-area damage, it can be repaired by bonding foam, but for small-area damage, it is difficult to use foam to repair, and the model making The process needs to be spliced, so there is a problem of seams. At present, waste newspapers are used to treat the seams or smooth paint is used to deal with this problem...

AI Technical Summary

Problems solved by technology

[0003] After the foam model is made, due to the characteristics of the foam, it is easy to be bruised and damaged. For large-area damage, it can be repaired by bonding foam, but for small-area damage, it is difficult to use foam to repair, and the model making The process needs to be spliced, so there is a problem of seams. At present, waste newspapers are used to treat the seams or smooth paint is used to deal with this problem. Among these two methods, the processing time of newspapers is longer and it is not easy to operate; Use bright and clean paint, because the paraffin in the smooth paint will melt at high temperature, the model will be dried after being sprayed with paint, the melting of the paraffin-based smooth paint will cause the paint layer to peel off, which will affect the quality of the coating