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Ceramic component with cavity structure and preparing method of ceramic component

A ceramic and inner cavity technology is applied in the field of ceramic components with inner cavity structure and their preparation, which can solve the problems of inability to apply high-strength injection molding, inability to realize industrial production, and limited design flexibility, and achieve accurate size and shape. , The effect of strong aesthetics and high equipment utilization

Inactive Publication Date: 2019-01-18
广东金刚新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although 3D printing technology can solve the problem of inner cavity forming, it is temporarily unable to realize industrial production due to the limitations of existing printing technology and high cost.
In addition, degreasing is often carried out by heating, which takes a long time.
[0006] However, when using injection molding to prepare ceramic products with an inner cavity structure, there are significant process limitations: the main performance is that the inner core mold needs to be constrained in the mold, so the inner core mold needs to be withdrawn from the product through a withdrawal step before ejecting the part , which has a very large limitation on design flexibility
However, the core strength prepared by it is only 1-6MPa, which is not suitable for high-strength injection molding
At the same time, this method of dissolution is likely to cause the dissolution of the organic solution in the raw material, which in turn causes defects such as swelling and cracking.

Method used

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  • Ceramic component with cavity structure and preparing method of ceramic component
  • Ceramic component with cavity structure and preparing method of ceramic component
  • Ceramic component with cavity structure and preparing method of ceramic component

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preparation example Construction

[0039] The invention provides a method for preparing a ceramic component with an inner cavity structure, comprising:

[0040] S101: making a soluble core according to the cavity structure;

[0041] According to the cavity structure of the ceramic component to be prepared, the core is prepared with polar thermoplastic. The molding method of the core can be 3D printing molding, injection molding and isostatic pressing molding, but not limited thereto. Among them, the more economical and applicable method is to use the injection molding method to form the core, which mainly includes: heating the polar thermoplastic to the melting temperature, injecting it into the mold, and obtaining the core to be used after cooling. The core material needs to ensure a high degree of smoothness, without defects such as burrs on the surface, and the core can be polished if necessary. In addition, the shape of some cores can be very complex. At this time, 3D printing can be considered to form th...

Embodiment 1

[0070] (1) According to the shape of the inner cavity structure 1, polyvinyl chloride is used to prepare the core by injection molding; after molding, it can be selected to carry out appropriate polishing according to its surface condition, so as to obtain a core with higher smoothness and no burrs;

[0071] (2) Alumina powder is mixed with paraffin, and granulated to obtain injection powder;

[0072] (3) Put the core into the mold and fix the core through the thimble; heat the injection powder in the injection machine to transform it into a viscous melt; and inject it into the mold under the working conditions of 110°C and 80MPa pressure; Cooling, removing the outer mold to obtain a ceramic blank;

[0073] (4) Immerse in methylene chloride after the ceramic blank is cooled, dissolve and remove the polyvinyl chloride core, take it out from the solution after 40 hours to obtain the green body;

[0074] (5) Place the green body in a ventilated position to air dry;

[0075] (6)...

Embodiment 2

[0078] (1) According to the shape of the inner cavity structure 1, polystyrene is used to prepare the core by injection molding; after molding, it can be selected to perform appropriate polishing according to its surface condition, so as to obtain a core with higher smoothness and no burrs;

[0079] (2) Alumina powder is mixed with paraffin, and granulated to obtain injection powder;

[0080] (3) Put the core into the mold and fix the core through the thimble; heat the injection powder in the injection machine to transform it into a viscous melt; and inject it into the mold under the working conditions of 150°C and 100MPa pressure; Cooling, removing the outer mold to obtain a ceramic blank;

[0081] (4) Immerse in toluene after the ceramic blank is cooled, dissolve and remove the polystyrene core, take it out from the solution after 55 hours to obtain the green body;

[0082] (5) Place the green body in an oven and dry it at 50°C;

[0083] (6) Transfer the dried body to the ...

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Abstract

The invention discloses a preparing method of a ceramic component with a cavity structure. The method includes the steps of preparing a soluble core according to the cavity structure, preparing injection feed, placing the soluble core in a mold for injection molding, soaking the soluble core in a dissolving solution so that the dissolving solution and the soluble core can react, removing the soluble core to obtain a blank, and conducting drying and sintering. Accordingly, the invention further discloses the ceramic component with the cavity structure. The ceramic component is prepared throughthe preparing method. The method is simple, efficiency is high, the ceramic component can be produced on a large scale, and the prepared ceramic component is high in precision, high in strength and attractive in appearance.

Description

technical field [0001] The invention belongs to the field of preparation of fine ceramics, in particular to a ceramic component with an inner cavity structure and a preparation method thereof. Background technique [0002] With the advancement of industry, in specific fields, the demand for ceramic structural parts with inner cavities is becoming wider and wider. The general method of forming ceramic parts with inner cavity structure is to prepare several individual ceramic parts first, and then assemble them by welding, but this forming method will have obvious weld seams, and the strength of ceramics is low; it cannot meet the needs of some occasions. production needs. [0003] Another method is to use 3D printing, which is to mix ceramic powder with photocurable resin to form a stable slurry, and then use a laser 3D printer to scan layer by layer to solidify the slurry layer by layer, so as to achieve the purpose of molding. Although 3D printing technology can solve the...

Claims

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Application Information

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IPC IPC(8): B28B1/24B28B7/28B28B7/34
CPCB28B1/24B28B7/28B28B7/342B28B7/348
Inventor 王斌王玉梅陈家才
Owner 广东金刚新材料有限公司
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