Quick-drying water-based paint for large castings

Abstract

The invention discloses a quick-drying water-based paint for large castings. The quick-drying water-based paint for the large castings is composed of the following components in parts by weight: 100 parts of a composite refractory base material, 2-8 parts of a binder, 1-5 parts of sodium bentonite, 1-5 parts of methylcellulose, 2-3 parts of aluminium sulphate, and 25-30 parts of water, wherein the composite refractory base material is composed of the following substances in percentage by mass: 15-20% of quartz powder, 30-60% of zirconium-containing composite silicate, 15-20% of talcum powder, and 8-15% of zircon powder; and the binder is a compound of oxidized rosin resin and silicate binders. The paint disclosed by the invention is a water-based paint which is capable of effectively reducing the production cost and is also environment-friendly; moreover, the water content of a solvent of the paint is about 20%, and is obviously less compared with other water-based paints; and the coating of the paint is free from a sand-staining phenomenon under the cooperation of other components, fast in self-drying speed, and excellent in performance.

Description

technical field [0001] The invention relates to a quick-drying water-based paint for large castings. Background technique [0002] According to the actual production situation, the cost of cleaning castings accounts for about 30% of the entire casting production cost, and after coating, after deducting the cost of coating and application, the cleaning cost of castings can be reduced to 10%. In addition to the advantages, the surface quality and appearance grade of the coated castings are significantly improved. [0003] Most of the coatings in the prior art are aimed at small-sized or thin-walled castings, and the effect is often not good for large-scale castings. For large and thick castings, there is volume shrinkage during the metal solidification process, and cooling time Longer, it is easy to stick to the sand due to the convolution of the metal or the progress of the chemical reaction in this process. [0004] The Chinese patent application number 201210379149.6 disc...

AI Technical Summary

Problems solved by technology

[0003] Most of the coatings in the prior art are aimed at small-sized or thin-walled castings, and the effect is often not good for large-scale castings. For large and thick castings, there is volume shrinkage during the metal solidification process, and cooling time Longer, it is easy to appear sticky sand phenomenon due to metal convolution or chemical reaction in this process

[0004] The Chinese patent application number 201210379149.6 discloses a large-scale casting lost foam coating and its preparation method, but the water-based coating has a slow self-drying speed, and the anti-sand sticking performance needs to be further improved