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Aluminum alloy casting method of composite casting mold

A compound casting mold and aluminum alloy technology, which is applied in the direction of casting mold, casting mold composition, casting molding equipment, etc., can solve the problems of surface rough quality decline, production cost increase, complex structure, etc., so as to reduce labor intensity and save casting cost , Improve the effect of surface quality

Inactive Publication Date: 2018-05-11
HARBIN DONGAN ENGINE GRP
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  • Abstract
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AI Technical Summary

Problems solved by technology

For some products, such as some aviation product casings, which have the characteristics of complex casting shape, precise size, large and thin wall, and no overall margin, the investment casting method is used for casting, and the size of the investment mold that needs to be designed is large, and the structure Complicated and requires a large gating system, which will increase the production cost of the product
If the sand casting method is used, due to the characteristics of sand casting, the dimensional accuracy of the casting is low, and the rough surface quality is reduced, which cannot meet the requirements of use.

Method used

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Experimental program
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Embodiment Construction

[0021] A method for casting an aluminum alloy of a composite mold, the method comprising the following steps:

[0022] 1. According to the requirements of product drawings, design casting drawings;

[0023] 2. Manufacture molds, in which the main part of the casting adopts investment casting shell, the gating system and riser part of the casting adopt sand mold, and the main part and pouring riser system are painted separately during the preparation of the mold shell;

[0024] 3. After the shell is prepared, use the skylight to open the main part of the shell and the part connected to the riser;

[0025] 4. Burn the mold shell, and use the slurry to connect the main part of the mold shell with the pouring riser after roasting;

[0026] 5. Put the shell connected with the main part and the riser into the sand box for molding to form the middle box;

[0027] 6. According to the size of the middle box, select the lower box and the upper box with the raw liquid pool;

[0028] 7...

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PUM

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Abstract

The invention relates to an aluminum alloy casting method of a composite casting mold. A complex pouring system or part of casting structures adopt sand molds, so that the design limitation of the pouring system in investment casting is prevented, and the defects of weak roughness of casting surfaces of aluminum alloy sand molds and low size precision are solved; meanwhile, the pouring system partially adopts the sand mold casting to make up for the design limitation of the pouring system in investment casting; the total casting cost of investment casting is greatly saved; and the method is suitable for aluminum alloy castings with complex and compact structures, high precision, small wall thickness, high performance, ducts, complex cavities, complex oil ways and the like.

Description

technical field [0001] The invention relates to a casting method, in particular to an aluminum alloy casting method of a composite casting mold. Background technique [0002] Investment casting and sand casting are two casting methods. Investment casting precision casting is a fusible model made of fusible materials, coated with several layers of special refractory materials, dried and hardened to form an integral module, and then melted from the module to obtain a hollow The mold shell is put into the roasting furnace for high-temperature roasting, and finally the molten metal is poured into it to obtain the casting. Features of investment casting process Castings have high dimensional accuracy and fine surface roughness. The dimensional accuracy of investment casting castings can reach 4-6 grades, and the surface roughness can reach Ra0.4-3.2μm, which can greatly reduce the machining waste of castings. amount, and can achieve no surplus casting. Sand casting is the use ...

Claims

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Application Information

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IPC IPC(8): B22C9/02B22C9/04B22D18/04
CPCB22C9/02B22C9/04B22D18/04
Inventor 商继章徐尧民李俭英于忠军张爽张翼
Owner HARBIN DONGAN ENGINE GRP
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