Modeling method and sand mold structure of sector-shaped end cover type casting for large-size mill

Abstract

The invention relates to a modeling method and a sand mold structure of a sector-shaped end cover type casting for a large-size mill in the technical field of casting. The sand mold structure comprises a casting pattern, an upper side sand mold and a lower side sand mold, wherein a bottom pouring type pouring system sand mold is pre-arranged on the lower side of the casting pattern, is a sector-shaped sand mold supported on the inner side of the bottom of the sector-shaped end cover type casting pattern, and is internally provided with an inner pouring gate and a plurality of inner sprues which are communicated with the inner pouring gate and are upward vertically arranged; the bottom of the casting patter is vertically provided with a plurality of sprue positioning platforms corresponding to the inner sprues; the sprue positioning platforms are matched with the inner sprues in a guided manner; a plurality of supporting rods are arranged between the bottom outer edge of the casting pattern and a template to support the outer edge of the casting template; and the upper side sand mold is directly arranged on the upper side of the pattern in a sand running manner and is internally provided with a plurality of dead heads. According to the sand mold structure, the manufacturing difficulty of the sand mold can be lowered, the production cost is reduced, the manufacturing efficiency of the sand mold is improved and the production period is shortened.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a molding method and a sand mold structure of fan-shaped end cap castings for large mills. Background technique [0002] Large-scale mill inlet and outlet end cover castings are the main components of the mill. Generally, the structure of end cover castings adopts a 180° fan-shaped structure, and super-large end cover castings also adopt a 90° fan-shaped structure. Due to the single operation mode of this type of product, the structure is relatively fixed and simple, and only the size of the fan is different according to the product model. Therefore, the casting process of such products as conventional casting products is relatively mature and fixed. [0003] For such fan-shaped end cap castings, the common molding in the prior art generally adopts the method of combining an outer mold, a tire plate and a core box. The main problems of this method are: different types of termi...

AI Technical Summary

Problems solved by technology

The main problems of this method are: different types of terminal products need to make different outer moulds, tire plates and core boxes. Through the processes of modeling, core making, and box closing, the production cycle is long and the process is many. The production cycle and production cost higher

At the same time, the traditional molding method needs to increase the size of multiple fit gaps, core positioning and other dimensions during the manufacturing process, making it difficult to control the size of the casting and increase the difficulty of quality control

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