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Ceramic body dry-pressing and forming process

A technology of ceramic blank and dry pressing, which is applied to the processing and forming of ceramic blanks with a thickness of ≥ 2 mm, and the microwave dielectric ceramic blank pressing technology field under protection and demoulding. problems such as large production costs, to achieve the effect of improving product qualification rate, reducing production costs, and saving raw materials

Active Publication Date: 2012-03-14
WUHAN FINGU ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Ceramic body dry-pressing and forming process
  • Ceramic body dry-pressing and forming process
  • Ceramic body dry-pressing and forming process

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0024] Such as figure 1 As shown, the ceramic green body dry pressing molding process includes the following steps:

[0025] ① Filler, add the material powder for making the ceramic green body into the female mold, and the upper punch descends into the female mold (see attached drawing figure 2 shown); ②, pre-pressurization, the upper punch descends, and before the female die descends, the upper punch begins to compress the powder, so that the powder density at the upper part of the female die increases (refer to the accompanying drawing image 3 shown); ③, synchronous pressing, while the upper punch is further lowered, the female mold and the upper punch move downward synchronously, so that the powder density at the lower part of the female mold increases (refer to the accompanying drawing Figure 4 shown); ④, pressurize again, the upper pun...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B3/02C04B35/465
Inventor 钟伟刚钟定祥
Owner WUHAN FINGU ELECTRONICS TECH
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