Method for casting annular thin-wall castings by means of feeding stack box of gating system

Abstract

The invention relates to a method for casting castings, in particular to a method for casting annular thin-wall castings by means of a feeding stack box of a gating system. The method is characterized in that firstly, a mould is designed and manufactured; secondly, a core box containing a detachable cross pouring gate, a detachable feeding pouring gate and a casting mould is manufactured; thirdly, a corresponding lower-form and shrinkproof loam core is manufactured, and the loam core and the feeding pouring gate are manufactured according to the number of the castings; fourthly, the mould is matched, and castings are obtained by pouring molten iron after the mould is matched; and fifthly, the qualified castings are obtained after grinding, cleaning and detecting are completed. According to the pouring method of the annular thin-wall castings, the mould is easy to manufacture, a plurality of parts can be manufactured through one box according to needs, the number of the castings through the box can be flexibly adjusted according to needs, the finally formed castings are good in structure and performance, the probability of the shrinking defect is obviously lowered, the cost is low, and the percent of pass of the products is high.

Description

technical field [0001] The invention relates to the field of casting, in particular to a process method for casting an annular thin-walled casting by using a gating system feeding shrink box. Background technique [0002] With the development of the economy, foundry enterprises have higher and higher requirements on the production cost, production efficiency and reject rate of castings, and customers have more and more stringent requirements on product quality. The traditional casting production process of annular thin-walled parts uses a large amount of chilled iron to reduce the shrinkage of the casting. Generally, one box is made flat, but the large amount of chilled iron is easy to produce cold barriers, pores, sand and mud, and chilled iron gaps. Various defects such as shrinkage porosity and high hardness of cold iron materials are difficult to process. The production efficiency is low, the scrap rate is high, and heat treatment is often required, which is costly and e...

AI Technical Summary

Problems solved by technology

The traditional casting production process of annular thin-walled parts uses a large amount of chilled iron to reduce the shrinkage of the casting. Generally, one box is made flat, but the large amount of chilled iron is easy to produce cold barriers, pores, sand and mud, and chilled iron gaps. Various defects such as shrinkage porosity and high hardness of cold iron materials are difficult to process. The production efficiency is low, the scrap rate is high, and heat treatment is often required, which is costly and easy to deform; It is difficult to effectively solve the shrinkage and porosity. Generally, a large amount of cold iron is used, and defects such as wrong toilet and uneven machining allowance are caused by parting and drafting slope.

Due to the cooling of the molten iron when the ladle is moved in the traditional process, only 2 or 3 castings can be poured in a ladle of molten iron, and the casting temperature of each casting varies greatly, resulting in low production efficiency and high scrap rate

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