Molding method of casting

Abstract

The invention belongs to the technical field of casting, and particularly relates to a molding method of a casting, which is used for realizing rapid manufacturing of a ring steel casting without manufacturing a mold. Modeling in a manner of dividing an upper box and a lower box by taking the end surface of a casting as a parting surface; a main body sand core and a bed mould sand core are manufactured, a positioning reference for placing the main body sand core is arranged on the bed mould sand core, the positioning reference follows the profile of the end face of the casting, and the main body sand core is divided into an inner ring sand core and an outer ring sand core; the bed mould sand core is divided into a reference core, a plurality of rotating cores and a closed core, and the matching surfaces of the reference core, the rotating cores and the closed core which are matched with one another are obliquely arranged; the standard core, the rotating cores and the closed core are assembled in sequence to form a bed mould sand core, quicksand molding is conducted, a pouring system is laid at the same time, and the box is turned over after molding sand is hardened; and upper box modeling: placing the inner ring sand core and the outer ring sand core on the lower box along the positioning reference to form a cavity of the casting, and performing quicksand modeling to finish upper box modeling.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a molding method of castings, which is used to realize rapid manufacturing of ring-type steel castings without making molds. Background technique [0002] In the prior art, the casting of ring-type steel castings adopts the combination of the lower box and the sand mold to form the cavity of the casting, so that the corresponding lower box tire plate and core box mold need to be made; the molding method of the prior art mainly has the following problems: [0003] 1. The mold base plate is generally made of wood or lost foam material. When making a large-diameter ring casting base plate, it needs to be made in pieces and then spliced ​​to complete, which makes the overall strength of the base plate poor, and it is easy to distort and deform during the overturning process. As a result, the size of the lower box is unqualified, which makes the positioning of the lower co...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a molding method for castings, in particular to a molding method for ring castings, so as to solve the problems of high casting cost and long cycle time in the prior art.

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