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Novel water glass sand shell making technique for investment casting

A technology of investment casting and water glass, which is applied in the direction of casting molding equipment, molds, mold components, etc., can solve the problems of poor surface roughness and dimensional accuracy, and low mold shell strength, so as to achieve good collapsibility and excellent surface quality of castings. Excellent quality and dimensional accuracy, good miscibility

Inactive Publication Date: 2013-10-16
TIANCHANG TIANXIANG GRP
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Problems solved by technology

In addition, the water glass binder is generally prepared with quartz powder, sprinkled with quartz sand, and chemically hardened in ammonium chloride solution and crystallized aluminum chloride solution. The shell strength obtained by this process is not high, and the surface of the casting is rough. The degree and dimensional accuracy are poor, and it is mostly used for casting carbon steel and low and medium alloy steel castings

Method used

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  • Novel water glass sand shell making technique for investment casting

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Embodiment Construction

[0014] In order to facilitate understanding of the present invention, the present invention enumerates the following examples. Those skilled in the art should understand that the examples are only used to help understand the present invention, and should not be regarded as specific limitations on the present invention.

[0015] Unless otherwise specified, various raw materials of the present invention can be obtained commercially; or prepared according to conventional methods in the art. Unless otherwise defined or stated, all professional and scientific terms used herein have the same meaning as is familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described can be applied to the method of the present invention.

[0016] Unless otherwise indicated, all professional and scientific terms used herein have the same meaning as is familiar to those skilled in the art. In addition, any methods and materials similar or equiva...

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Abstract

The invention discloses a novel water glass sand shell making technique for investment casting. The novel water glass sand shell making technique comprises the following steps: (1) smearing a surface layer; (2) smearing a transition layer; (3) smearing a third layer. The conventional water glass sand shell making technique is improved, special powder for precision casting and refining quartz sand are adopted, water glass and the special powder for precision casting are good in intersolubility, sizing agent flows smoothly, investment spreading mass is uniformly attached, the searing performance is good, and the stuccoing operability is good. The shell collapsibility after pouring is good, the surface roughness R of the casting is smaller than or equal to 6.3, and the surface quality and the dimensional accuracy of the casting are good.

Description

technical field [0001] The invention belongs to the field of investment casting and relates to a shell-making process, in particular to a novel water glass sand shell-making process for investment casting. Background technique [0002] Investment casting, also known as "lost wax casting", usually refers to making a pattern from a fusible material, coating several layers of refractory material on the surface of the pattern to make a shell, and then melting the pattern out of the shell to obtain a non-parting surface The casting mold can be filled with sand and poured after high-temperature roasting. Since patterns are widely made of waxy materials, investment casting is often referred to as "lost wax casting". [0003] The types of alloys that can be produced by investment casting include carbon steel, alloy steel, heat-resistant alloy, stainless steel, precision alloy, permanent magnet alloy, bearing alloy, copper alloy, aluminum alloy, titanium alloy and ductile iron. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04
Inventor 徐乐高徐大兵
Owner TIANCHANG TIANXIANG GRP
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