Water-based casting coating for large-type casting

Abstract

The invention discloses a water-based casting coating for a large-type casting. The coating is composed of, by weight, 65 percent to 75 percent of zircon power, 20 percent to 30 percent of water, 0.8 percent to 2.5 percent of sodium bentonite, 0.1 percent to 0.6 percent of hydrophilic type gas phase carbon dioxide, 0.2 percent to 0.8 percent of water-based polyurethane thickener, 0.2 percent to 0.8 percent of polyving akohol, 0.6 percent to 2 percent of water soluble acrylic copolymer, 0.1 percent to 0.4 percent of butyl cellosolve, 0.1 percent to 0.3 percent of tributyl phosphate, 0.1 percent to 0.5 percent of ethylene glycol and 0.05 percent to 0.4 percent of isothiazolinone. The adopted preparation method is advanced, and raw material components are effectively mixed. Various technical index properties, such as the rheological property, the thixotropy, the brushability, the suspension property, the storage property, film forming quality and brushing viscosity, of a prepared product are excellent, and the technical quality requirement of production of the large-type casting, particularly a super large type casting, can be met.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to a water-based casting paint for large castings. [0003] Background technique [0004] The casting amount of molten steel for large-scale castings can reach tens to hundreds of tons. The castings have large dimensions and wall thickness. It is required that the dry coating made by casting coatings must have a sufficient thickness to play anti-sticking sand and other functions. Therefore, coating is usually used Apply multiple coats to achieve the desired coating thickness. Due to the large surface area of ​​the sand mold used to produce large castings, the process of applying multiple coats of paint is complex, making it a labor-intensive job. The quality of casting coatings is the most direct factor affecting whether the castings are sand-sticking, sand inclusions, surface smoothness, and dimensional accuracy of castings. [0005] Contents of the in...

AI Technical Summary

Problems solved by technology

Due to the large surface area of ​​the sand mold used to produce large castings, the process of applying multiple coatings is complex, making it a labor-intensive job