Casting method of workpiece with partition plate arranged in thin long hole

Abstract

The invention belongs to the technical field of precise casting and relates to a casting method of a workpiece with a partition plate arranged in a thin long hole. The casting method comprises the steps of model treeing, coating, upper cushion sand filling, demoulding, cooling, pouring and the like. The special demoulding pretreatment solves the problem of cracking of a model shell, then the situation of run-out occurring in follow-up pouring is avoided, the method is easy to operate, additional design is avoided, the casting success rate can be increased, and then the cost is saved.

Description

technical field

[0001] The invention belongs to the technical field of precision casting, and relates to a casting method for a workpiece with a partition in an elongated hole. Background technique

[0002] Shell casting uses metal or plaster to make a fusible mold with the same structure as the workpiece to be cast, and then covers the outer surface of the mold with sand to form a shell; then melt and discharge the mold inside the shell, and the shell The body is formed into a mold shell; the mold shell is roasted and cast, and after the internal medium of the mold shell is cooled and formed, the mold shell is broken to obtain a casting.

[0003] In the shell mold casting of small workpieces with holes, due to the complex structure in the holes, the shells in the holes often interfere with each other when melting the mold, resulting in deformation or small holes, resulting in the problem of fire after casting; And the probability of running out of fire increases sharply wi...