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Local extrusion device used for high-pressure casting

An extrusion device and high-pressure casting technology, applied in the field of casting, can solve the problems of difficult to achieve shrinkage at the far gate, difficult to meet porosity, uneven wall thickness, etc., to reduce shrinkage porosity defects, reasonable structural design, The effect of improving the economic efficiency of enterprises

Inactive Publication Date: 2016-08-31
CITIC DICASTAL
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Problems solved by technology

At present, due to the complex structure of die castings, uneven wall thickness, and short solidification time, for the "hot spot" position in the product structure, methods such as high pressure feeding, optimizing runner structure, and enhanced cooling are often used to However, it is often difficult to achieve feeding at the far gate by adjusting process parameters, and the porosity is difficult to meet the increasing requirements of OEM customers

Method used

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  • Local extrusion device used for high-pressure casting
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Experimental program
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Embodiment Construction

[0024] Test group 1

[0025] Partial extrusion structure for aluminum alloy high pressure casting includes extrusion boss (02), extrusion core sleeve (03), extrusion rod (04), extrusion cylinder (05), extrusion cylinder piston (06) . The cross-sectional area ratio of the extrusion cylinder piston (06) to the extrusion rod (04) is 12 to ensure sufficient extrusion force. When the cylinder piston is not squeezed (at zero position), the front end of the extrusion rod (08) is 10mm higher than the end surface of the extrusion sleeve (10), and at the same time the front end of the extrusion rod (08) is in contact with the inner wall of the lower cavity of the extrusion core sleeve Cavity (12) is formed between (11); in the extruding process of extruding rod, the gap between the lower cavity inner wall (11) of extruding core sleeve and extruding rod (04) outer contour is within 10mm ( That is, the extrusion boss (02) wall thickness range). In order to ensure that the local extrusi...

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Abstract

The invention provides a local extrusion device used for high-pressure casting. The local extrusion device used for high-pressure casting is composed of an extrusion type core sleeve (03), an extrusion rod (04), an extrusion oil cylinder (05) and an extrusion oil cylinder piston (06) and is characterized in that the extrusion oil cylinder (05) internally comprises the extrusion oil cylinder piston (06) which is connected with the extrusion rod (04), the extrusion rod (04) is located in the extrusion type core sleeve (03), and the extrusion type core sleeve (03) is fixed to the extrusion oil cylinder (05). The local extrusion device and method used for high-pressure casting have the beneficial effects that the structural design is reasonable, the extrusion travel of a local extrusion process can be effectively guaranteed, meanwhile, the shrinkage porosity defect of a thick and large position of a product is reduced, the rejection rate of production is reduced, and the economic benefits of enterprises are obviously increased.

Description

technical field [0001] The invention relates to the field of casting, in particular to a partial extrusion device for high-pressure casting. Background technique [0002] Mold is an indispensable process equipment in modern industry, especially automobile, radio, aviation, instrument, daily necessities and other industries. At present, due to the complex structure of die castings, uneven wall thickness, and short solidification time, for the "hot spot" position in the product structure, methods such as high pressure feeding, optimizing runner structure, and enhanced cooling are often used to However, it is often difficult to achieve feeding at the far gate by adjusting process parameters, and the porosity is difficult to meet the increasing requirements of OEM customers. Contents of the invention [0003] Aiming at the above-mentioned technical requirements of aluminum alloy die-casting, the present invention proposes a local extrusion structure and process of a high-pres...

Claims

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Application Information

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IPC IPC(8): B22D17/20
CPCB22D17/20B22D17/2069B22D27/11B22D17/2015B22D17/203B22D17/266
Inventor 戴川张凤君王永宁朱志华李昌海
Owner CITIC DICASTAL
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