Ceramic body dry-pressing and forming process

Abstract

The invention discloses a ceramic body dry-pressing and forming process, which comprises the following steps of: (1) filling: adding material powder for manufacturing a ceramic body into a female die; (2) pre-pressing: lowering an upper punch, fixing the female die, and increasing the density of the material powder at the upper part of the female die; (3) synchronously pressing: synchronously and downwardly moving the female die and the upper punch, so that the density of the material powder at the lower part of the female die is increased; (4) pressing again: fixing the female die, continuously and downwardly pressing the upper punch, and pressing the material powder again; and (5) protectively demoulding: after pressing, pressing the upper punch on the surface of the ceramic body to demould, so that stress on the ceramic body is uniformly released to demould. According to the ceramic body dry-pressing and forming process disclosed by the invention, the crack and layering phenomenon of microwave medium ceramic parts is reduced; furthermore, the conical degrees of two ends of the ceramic body are reduced; and the product yield is increased.

Description

technical field [0001] The invention relates to a ceramic green body processing technology, in particular to a microwave dielectric ceramic green body press molding process under protected demoulding, which is mainly suitable for processing and forming a ceramic green body with a thickness ≥ 2 mm. Background technique [0002] There are many methods for forming ceramic bodies, and dry pressing is one of them. Dry pressing is simple and easy to operate, and the product has good consistency, which is especially suitable for mass production. However, the shape of the porcelain parts pressed by dry pressing is relatively simple. For those relatively large, especially thicker microwave dielectric porcelain parts (thickness ≥ 2mm), cracking and delamination are prone to occur during the demoulding process. In addition, After firing, there will be tapers at both ends of the product, which will bring more waste and defective products, the product qualification rate is low, serious ...

AI Technical Summary

Problems solved by technology

However, the shape of the porcelain parts pressed by dry pressing is relatively simple. For those relatively large, especially thicker microwave dielectric porcelain parts (thickness ≥ 2mm), cracking and delamination are prone to occur during the demoulding process. In addition, After firing, there will be tapers at both ends of the product, which will bring more waste and defective products, and the product qualification rate is low, resulting in serious waste and increasing the production cost of the enterprise

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