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Method for eliminating cracks of thin-walled cylinder casting

A technology for thin-walled tubes and castings, applied in the direction of casting molds, casting mold components, casting molding equipment, etc., can solve the problems of increased production costs, high scrap rate, waste of resources, etc., to avoid cracking, high production costs, and reduce resources wasteful effect

Pending Publication Date: 2021-03-16
宁波茸发新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the production process of castings, especially thin-walled cylindrical castings, the casting scrapping problem caused by crack defects frequently occurs; some castings have cracked from the edge of the mouth before sand falling out; Medium and slight bumps will cause cracks, high scrap rate, serious waste of resources, and greatly increased production costs

Method used

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  • Method for eliminating cracks of thin-walled cylinder casting

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Embodiment Construction

[0018] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0019] refer to figure 1 , the invention provides a kind of method for eliminating the crack of thin-walled cylindrical casting, it comprises the following steps:

[0020] S1. Put the sand core into the sand mold, and form a cavity for casting thin-walled cylindrical castings between the outer wall of the sand core and the inner wall of the sand mold;

[0021] S2. Inject molten iron into the mold cavity, the pouring temperature is greater than 1360°C, and the surface layer of the sand core with a certain thickness is burnt after the molten iron enters the cavity; the sand core is that many sand particles are connected by a resin binder, and burnt crisp means The connection of the sand particles—the space skeleton of the resin is burnt through high temperature; in this embodiment, the thickness of the surface layer of the burnt sand core is 3mm-5mm, wh...

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Abstract

The invention provides a method for eliminating cracks of a thin-walled cylinder casting. The method comprises the following steps that S1, a sand core is put into a sand mold, and a cavity for casting the thin-walled cylinder casting is formed between the outer wall of the sand core and the inner wall of the sand mold; and S2, molten iron is injected into the cavity, the pouring temperature is higher than 1360 DEG C, the surface layer of the sand core is burnt to be crisp after the cavity is filled with the molten iron, a surface sand layer resin framework is damaged, and shrinkage of the sand core during casting solidification is not hindered. According to the method for eliminating the cracks of the thin-walled cylinder casting, cracking during cooling solidification is avoided, the pouring yield is greatly increased, resource waste is avoided, the production cost is reduced, and the production benefits are increased.

Description

technical field [0001] The invention relates to a casting method, in particular to a method for eliminating cracks in thin-walled cylindrical castings. Background technique [0002] During the production process of castings, especially thin-walled cylindrical castings, the casting scrapping problem caused by crack defects frequently occurs; some castings have cracked from the edge of the mouth before sand falling out; In the process, slight bumps will cause cracks, high scrap rate, serious waste of resources, and greatly increased production costs. Contents of the invention [0003] 【1】Technical problems to be solved [0004] The technical problem to be solved by the invention is to provide a method for eliminating cracks in thin-walled cylindrical castings. [0005] 【2】Technical solution to solve the problem [0006] The invention provides a method for eliminating cracks in thin-walled cylindrical castings, which comprises the following steps: [0007] S1. Put the san...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C9/22
CPCB22C9/02B22C9/22
Inventor 韩登峰
Owner 宁波茸发新材料科技有限公司
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