Engine aluminum cylinder body low-pressure casting method

A low-pressure casting and engine technology, which is applied in the field of engine aluminum cylinder block casting and engine aluminum cylinder low-pressure casting, can solve the problems of inability to produce cast aluminum cylinder blocks, complex structures of engine aluminum cylinder blocks, and large wall thickness differences, and achieve High mechanical properties, clear contours, and the effect of reducing defects

Inactive Publication Date: 2015-01-21
台州艾锐思汽车部件有限公司
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  • Abstract
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Problems solved by technology

[0002] At present, cylinder block casting is a recognized cutting-edge technology in the domestic foundry industry. The complex structure of the engine aluminum cylinder block, the large wall thickness difference, the characteristics of the cast iron cylinder liner and the closed water jacket structure make this product still unable to be produced in China. The cast aluminum cylinder block meets the performance requirements, and it is easy to have defects such as pores and shrinkage during production

Method used

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Embodiment Construction

[0027] The present invention will be further described below:

[0028] A low-pressure casting method for an engine aluminum cylinder block, which sequentially includes core making, molten aluminum treatment, and low-pressure casting, wherein the molten aluminum treatment includes the following steps: melting: melting material AC4B at a high temperature of 710-730 degrees Degassing and refining of molten aluminum: degassing and refining treatment with a degassing refining agent; slag removal: extracting slag from the refined aluminum liquid; static: using a covering agent to isolate the aluminum liquid from the air, and then clean the aluminum liquid ;

[0029] The low-pressure casting includes the following steps: mold pretreatment: heating the mold and the cylinder liner, and installing the impregnated sand core and the cylinder liner at the same time; Liquid aluminum is poured; pressure keeping: by applying pressure to the inner cavity of the cylinder, and keeping the press...

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Abstract

The invention discloses an engine aluminum cylinder body low-pressure casting method. Casting of an engine aluminum cylinder body is achieved through core manufacturing, molten aluminum processing and low-pressure casting. Compared with high-pressure casting having the defects that casting inner air holes can be generated easily, the organization is loose and insufficient casting exists, low-pressure casting has the advantages that the casting technology parameters of low-pressure casting can be adjusted at will within any technological range, it can be guaranteed that liquid metal is stable in model filling, the writhe, the impact and the splashing caused in the model filling process of the molten metal can be reduced or avoided, and therefore less oxidizing slag is formed, the defects of castings are avoided or reduced, and the quality of the castings is improved; model filling can be performed on the molten metal under the action of pressure, the fluidity of the molten metal can be improved, the forming performance of the castings is good, the castings with the contours clear and the surface smooth and clean can be formed easily, and large thin-wall castings can be formed more easily.

Description

technical field [0001] The invention relates to a method for casting an aluminum cylinder body of an engine, which belongs to the technical field of casting, in particular to a method for low-pressure casting of an aluminum cylinder body for an engine. Background technique [0002] At present, the cylinder block casting is a recognized cutting-edge technology in the domestic foundry industry. The complex structure of the engine aluminum cylinder block, the large wall thickness difference, the characteristics of the cast iron cylinder liner and the closed water jacket structure make this product still unable to be produced in China. The cast aluminum cylinder block meets the performance requirements, and it is easy to have defects such as pores and shrinkage during production. Since the cylinder block is one of the key parts of the engine, and the aluminum alloy engine is one of the important symbols of the lightweight of the automobile engine, the quality of the engine direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04
CPCB22D18/04
Inventor 薛祖国
Owner 台州艾锐思汽车部件有限公司
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