Production method of annular ceramic product

A production method and ceramic technology, applied in the production field of annular ceramic products, can solve the problems of complicated use of molds, difficult filling and demolding, limited application scope, etc., so as to reduce processing volume, reduce production costs, and improve product qualification. rate effect

Active Publication Date: 2020-04-28
宁波江丰热等静压技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This hot-pressing mold is only suitable for the preparation of ring-shaped products of one size, and its scope of application is limited. During large-scale and diversified production, there are many types and quantities of molds required; Difficult to demould

Method used

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  • Production method of annular ceramic product
  • Production method of annular ceramic product

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Effect test

Embodiment 1

[0057] This embodiment provides a method for producing an annular boron carbide ceramic product, the method comprising the following steps:

[0058] (1) After mixing boron carbide powder and binder, carry out cold press molding in a cold press mold, the mixing mass ratio of cellulose and water in the binder is 1:29, and the boron carbide powder and binder The mixing ratio of the agent mass is 93:7, the pressure of cold forming is 6MPa, and the temperature is 20°C to obtain a cold-pressed part that matches the size of the finished product. The cold-pressed mold divides the cold-pressed part into a circular central area 1 and Two parts of the edge area, and then the edge area is divided into four-corner area 3 and the remaining area 2 to be processed by wire cutting. figure 1 shown;

[0059] (2) Pack the cold-pressed parts that step (1) obtains into the graphite hot-pressing mould, five layers of cold-pressing parts are filled in the mold cavity of the hot-pressing mold, and fo...

Embodiment 2

[0062] This embodiment provides a method for producing an annular silicon carbide ceramic product, the method comprising the following steps:

[0063] (1) After mixing silicon carbide powder and binder, carry out cold press molding in a cold press mold, the mass ratio of polyvinyl alcohol and water in the binder is 1:10, and the silicon carbide powder and binder The mixing mass ratio is 9:1, the pressure of cold forming is 8MPa, and the temperature is 15°C to obtain a cold-pressed part that matches the size of the finished product. The cold-pressed mold divides the cold-pressed part into a circular central area 1, Three parts of the area to be processed 2 and the four-corner area 3;

[0064] (2) Pack the cold-pressed parts that step (1) obtains into graphite hot-pressed moulds, and fill three layers of cold-pressed parts in the mold cavity of the hot-pressed mold, and fill six cold-pressed parts in each layer, and between different layers of cold-pressed parts Graphite paper ...

Embodiment 3

[0067] This embodiment provides a method for producing an annular boron nitride ceramic product, the method comprising the following steps:

[0068] (1) After boron nitride powder and binder are mixed, cold press molding is carried out in a cold press mold, the mixing mass ratio of polyvinyl butyral and ethanol in the binder is 1:15, and the nitrogen The mixing mass ratio of boron powder and binder is 92:8, the pressure of cold forming is 4MPa, and the temperature is 30°C, so as to obtain cold pressed parts matching the size of the finished product, and divide the cold pressed parts by wire cutting It consists of three parts: the circular central area 1, the area to be processed 2 and the quadrangular area 3;

[0069] (2) Pack the cold-pressed parts that step (1) obtains into graphite hot-pressed moulds, fill six layers of cold-pressed parts in the mold cavity of the hot-pressed mold, and fill nine cold-pressed parts in each layer, and between different layers of cold-pressed ...

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Abstract

The invention provides a production method of an annular ceramic product, and the method comprises the following steps: mixing raw material components, and carrying out cold press molding to obtain acold-pressed part matched with the size of the finished product, wherein the cold-pressed part at least comprises two segmentation areas of a circular central area and an edge area; and filling a hot-pressing mold with the cold-pressed part, separating the different segmentation areas of the same cold-pressed part by using carbon paper, then carrying out hot-pressing sintering, and then machiningto obtain the annular ceramic product. By utilizing the characteristic that the cold-pressed part is easy to process, different areas are segmented in the process of forming the cold-pressed part, sothat the cold-pressed part preliminarily meets the requirements of product shapes, the processing amount required after hot pressing is greatly reduced, the processing difficulty and the production cost are reduced, the production cost can be reduced, and the product percent of pass can be increased.

Description

technical field [0001] The invention belongs to the technical field of ceramic product preparation, and relates to a production method of an annular ceramic product. Background technique [0002] The hot pressing mold method is a commonly used method in the preparation of ceramic products. It usually includes steps such as mixing, molding, hot pressing and machining. Due to the variety of ceramic products and different application fields, sometimes the shape of the ceramic product will be different. Require. For the preparation of special-shaped ceramic products, the commonly used method is to make matching molds or cut the preliminary products; the former has a high cost of purchasing or making molds separately due to the special shape and variable size of the product. Narrow, long production cycle; because ceramic products are often strong, it is difficult to process in the later stage of cutting, and it is prone to cracking and chipping, resulting in a low pass rate of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/645C04B35/10C04B35/563C04B35/575C04B35/583
CPCC04B35/622C04B35/645C04B35/563C04B35/575C04B35/583C04B35/10C04B2235/602C04B2235/656C04B2235/94
Inventor 姚力军潘杰王学泽王钜宝温毅博
Owner 宁波江丰热等静压技术有限公司
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