Alcohol-group coating for V-method casting and preparation method thereof

Abstract

The invention discloses an alcohol-group coating for V-method casting, wherein the coating is powdery or granulous and is formed by blending 100 parts of fire-resistant powder and 10-14 parts of composite sizing agent by weight. Meanwhile, the invention further discloses a method for preparing the alcohol-group coating for V-method casting. Compared with the prior art, the costing disclosed by the invention is powdery or granulous, so that the advantages of convenience and safety in transportation are achieved; the packaging cost is low because barrels are not required for package; the transportation cost is low because the phenomenon of sediment hardening does not occur during the transportation so as not to result in material scrap; meanwhile, the coating further has the advantages that the adhesion and bond strength of a coating layer is high, the capability of resisting metal fluid machinery and thermal shock is strong, the drying time is short, the production efficiency is high, and the sand cohesiveness resistance is excellent.

Description

technical field [0001] The invention belongs to the technical field of coatings for casting, and in particular relates to an alcohol-based coating for V-method casting and a preparation method thereof, which is applicable to the application of the V-method casting process for mass production of steel and iron castings. Background technique [0002] V method casting is a new generation of physical forming method after mechanical forming and chemical forming. The basic principle is to fill a single dry sand into the sand box with an air pumping chamber, slightly shake it tightly, and then vacuumize the sand mold covered with plastic film on the mold surface and the back of the sand box, and use the pressure difference inside and outside the sand box to make The mold is finalized, then the mold is lifted, the box is closed, and the molten metal is poured while maintaining a vacuum. [0003] Compared with traditional sand casting, its biggest advantage is that the molding sand ...

AI Technical Summary

Problems solved by technology

[0005] At present, the V-method casting coatings on the market are all alcohol-based slurry or paste coatings. The problems in the use of this type of coatings in production: First, the slurry or paste alcohol-based coatings are easy to precipitate during long-distance transportation Hardening, it will be scrapped in severe cases; second, its coating is flammable and explosive, and there are safety hazards in its transportation and storage; third, it is difficult to recycle the packaging barrel after long-distance transportation, which increases the cost of foundry enterprises