Cold type coated sand paint coating process for casting

Abstract

The invention discloses a cold type coated sand paint coating process for coating, which mainly comprises the following steps of: polishing the surface of the inner wall of a cold type body; heating the cold type body to 220 DEG C and preserving heat; when the temperature of the cold type body reaches 200 DEG C, polishing again; fetching the coated sand paint according to the specifications of the cold type body, and putting the coated sand paint in a coating device for stirring uniformly; and after the temperature of the cold type body reaches 180 DEG C, coating the coated sand paint on the inner wall of the cold type body, and hardening and forming. Through the process disclosed by the invention, the prepared paint layer of the cold type inner wall has uniform thickness, does not drop easily, and greatly improves the glossiness; and by applying the paint layer to roller casting, the phenomenon that the roller casting quality is influenced by the problem of the surface of the cold type inner wall in the casting process can be avoided, and the yield of a roller is greatly increased.

Description

technical field [0001] The invention relates to a processing technology in the casting field, in particular to a cold-type paint coating technology used for casting rolls. Background technique [0002] The process of casting rolls is to pour high-temperature molten metal into cold molds. The cold type is prone to wear and thermal fatigue under the centrifugal action of the molten metal, thereby reducing the service life of the cold type of the roll and affecting the surface quality of the roll. In order to solve the quality problem of the roll surface, the conventional method is to improve the quality of the roll surface by changing the quality of the cold-type inner wall, that is, to spray a layer of zircon powder coating on the cold-type inner wall surface. However, when spraying paint on the cold inner wall, manual spraying is often used. Due to the large dust in the working environment and the insufficient human control ability during this process, it is easy to cause i...

AI Technical Summary

Problems solved by technology

However, when spraying paint on the cold inner wall, manual spraying is often used. Due to the large dust in the working environment and the insufficient human control ability during this process, it is easy to cause inconsistent spraying thickness, difficult adjustment of paint hardness, and poor paint uniformity. The occurrence of such phenomena will further cause casting defects such as scarring on the surface of the roll, resulting in a decline in the quality of the working layer of the roll, and even the scrapping of the roll, which will affect the use of the roll.

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