A cold iron production process

Abstract

The invention relates to a chilling block preparation process. The contact face of a chilling block is coated with acrylic acid concave-convex orange-grained paint and then is dried, so that an extremely firm protective film can be formed on the contact face after the paint is cured. The paint is extremely high in fire resistance, so that water of sand in a casting can be prevented from coming out of the paint, so as to realize strong protection and control, therefore, the service life of the chilling block is prolonged, and the quality of the casting is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a cold iron manufacturing process. Background technique [0002] In casting production, in order to increase the local cooling speed of the casting, the metal block placed inside the cavity and on the working surface is called chill iron. The chill iron plays an important role in improving the riser and preventing shrinkage cavity and shrinkage of the casting, so as to ensure the quality of the casting. role. [0003] Cold iron is divided into two categories: inner cold iron and outer cold iron. The metal chilled block that is placed in the cavity and can be fused with the casting is called the inner chiller; the metal block placed on the surface of the pattern (core box) during the molding (core) is called the outer chiller. Because of its structural requirements, the wall thickness of each part of the cast iron is uneven. Some parts are very thick, and they cool s...

AI Technical Summary

Problems solved by technology

[0005] 1. The service life of the cold iron is short, pores and cracks are prone to appear on the surface, and the cost is high, and the replacement is frequent;

[0006] 2. The chilling effect cannot be guaranteed 100%, and casting defects cannot be guaranteed, especially the use of internal cooling iron. Improper use is more likely to cause casting defects, and the pass rate of castings cannot be guaranteed;

[0007] 3. The internal management is complicated. Since the cold iron needs to be replaced frequently, the management of the used cold iron is more troublesome. It is necessary to record and clean up the site in time. Once there is confusion, it will lead to problems with the quality of the casting;

[0008] 4. At present, the coatings on the market are not resistant to high temperature, and the gas generation is relatively large, so it is easy to cause pores in the casting

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