Casting method with easy demoulding function

Abstract

The invention discloses a casting method with an easy demoulding function. The casting method comprises the following steps that (1) a casting head is formed in the surface of a mould, after mouldingsand is buried, the interior of the mould is vacuumized, and a casting mould is shaped through the difference of pressure inside and outside a sand box; (2) a coating material is sprayed onto the surface of the inner wall of a mould cavity by a spraying gun, and comprises the following raw materials of, by weight, 15-18 parts of silica powder, 1.1-1.3 parts of phenolic resin, 3-5 parts of active agents, 4-5 parts of iron oxide, 3-5 parts of calcium stearate and 10-15 parts of solvents; and (3) drawing is conducted1 min later, iron liquid is poured in a vacuum state, and demoulding is conductedafter cooling. After demoulding is conducted by using the casting method, no moulding sand exists on the surface of a casting basically, the surface of the casting is flat, the surface quality is good, and thus it shows that through the casting method, sand sticking can be effectively prevented, the pre-buried sand mould is not damaged, the mould does not need to be finished repeatedly when the same type of parts are machined repeatedly, coating spraying does not increase the additional machining time, and the work efficiency of casting machining is ensured.

Description

technical field [0001] The invention relates to a casting method capable of improving processing quality, which belongs to a part processing method. Background technique [0002] Many large parts such as gears and axles are obtained by casting. However, the castings often bring out the molding sand during the demoulding process. The castings and the molding sand are often not easy to separate, which directly leads to the decline in the quality of the castings and damages the pre-embedded sand molds. , resulting in the need to constantly trim the mold when repeatedly processing the same type of parts, which greatly reduces work efficiency and quality. Contents of the invention [0003] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide a casting method that can improve the processing quality, which can easily separate the casting from the molding sand, can ensure the quality of the final casting, and at the s...

AI Technical Summary

Problems solved by technology

[0002] Many large parts such as gears and axles are obtained by casting. However, the castings often bring out the molding sand during the demoulding process. The castings and the molding sand are often difficult to separate, which directly leads to the decline in the quality of the castings and damages the pre-embedded sand molds. , resulting in the need to constantly trim the mold when repeatedly processing the same type of parts, which greatly reduces work efficiency and quality