Preparation method of reusable investment casting shell, shell and casting process

A technology of investment casting and investment molding, which is applied in casting molding equipment, manufacturing tools, casting molds, etc., can solve the problems of mold shell cracks, reduce the high-temperature strength of the mold shell, and pouring sticky molds, etc., and achieve high temperature expansion coefficient and fire resistance The effect of high strength and simplified cleaning procedures

Active Publication Date: 2020-12-25
佛山市恒之芯复合材料有限公司
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Problems solved by technology

Because if the thickness of the shell is too high, it is difficult to completely oxidize and decompose some organic reinforcing agents located in the inner layer of the shell, which is likely to cause the defect of casting sticking mold; and the oxidation temperature of the organic reinforcing agent near the outer layer of the shell is also correspondingly increased, making Cracks occur in the shell during the oxidation process, reducing the high temperature strength of the shell

Method used

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  • Preparation method of reusable investment casting shell, shell and casting process
  • Preparation method of reusable investment casting shell, shell and casting process
  • Preparation method of reusable investment casting shell, shell and casting process

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below.

[0043] Conventional investment casting shells are difficult to reuse as shell materials, resulting in huge waste and increased production costs. For this reason, the present invention provides a kind of preparation method of reusable investment casting shell, see figure 1 , which includes the following steps:

[0044] S1: Provide investment pattern, bottom plate, top plate, rigid cylinder and refractory slurry;

[0045] The investment material can be wax-based molding material, rosin-based molding material, resin-based molding material or hybrid molding material, but not limited thereto; the investment model can be prepared by hot pressing method, 3D printing method, but not limited thereto. Preferably, in the present invention, resin-based molding material is selected as the investment mold material, whi...

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Abstract

The invention discloses a preparation method of a reusable investment casting shell. The preparation method comprises the following steps of providing an investment pattern, a bottom plate, a top plate and a rigid cylinder; adhering the investment pattern to the bottom plate, and sleeving the exterior of the investment pattern with the rigid cylinder; injecting refractory slurry into a cavity between the rigid cylinder and the investment pattern, closing an upper opening of the rigid cylinder by adopting the top plate, and carrying out autoclaving by adopting steam; and roasting after autoclaving to obtain an investment casting shell finished product. The refractory slurry mainly comprises a refractory material, water, an expanding agent, a wetting agent and a defoaming agent. The invention further discloses a reusable investment casting shell and an investment casting process. By implementing the method, the shell can be reusable for multiple times, no solid waste is generated, a production period can be shortened, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of investment casting, in particular to a method for preparing a reusable investment casting shell, a shell and a casting process. Background technique [0002] Investment casting usually refers to the use of fusible substances to make an investment mold with the same shape as the casting, and several layers of refractory materials are coated on the surface of the investment mold to make a shell, and then the investment mold is melted and discharged from the shell, through hardening and high-temperature roasting A casting method in which a cavity for casting is obtained and then cast into shape. After the pouring and molding are completed, the shell needs to be removed. The shell removal process can be determined according to its specific material and physical and chemical properties. For example, for sintered ceramic shells, acid or alkali corrosion is generally used to remove them. The shell can be remove...

Claims

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Application Information

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IPC IPC(8): B22C1/02B22C9/04
CPCB22C1/02B22C9/04
Inventor 张志锋
Owner 佛山市恒之芯复合材料有限公司
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