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A method for forming a ceramic body

A ceramic embryo body and ceramic slurry technology, applied in the direction of unloading devices, manufacturing tools, etc., can solve the problems of damage, cracking inside, embryo body cracks, etc., and achieve the effect of simple operation method and energy saving

Active Publication Date: 2017-03-01
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low strength of the initially formed ceramic body, and the problem of adhesion between the gelled ceramic body and the surface of the mold in the gel injection molding process, the body is often deformed, cracked or internally deformed during the demoulding process. Defects such as damage, especially for ceramic products with complex shapes
At the same time, after the ceramic embryo is taken out of the mold, it is directly in contact with the air, which will speed up the drying speed of the embryo and cause a large number of cracks in the embryo
This is also one of the main reasons why this molding technology cannot be widely used in production

Method used

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  • A method for forming a ceramic body
  • A method for forming a ceramic body
  • A method for forming a ceramic body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] see Image 6 , Embodiment 1 of the present invention provides a method for forming a ceramic green body, which includes the following steps:

[0075] S30, calculating and preparing a molding die 140 according to the size of the ceramic product to be formed;

[0076] S31, placing the molding mold 140 on the vacuum vibration table 120, coating a coating film 103 on the surface of the molding mold 140, so that the coating film 103 is attached to the surface of the molding mold 140;

[0077] S32, place the sand box 101 on the vacuum vibrating table 120 and cover the molding mold 140, then fill the sand box 101 with molding sand 102, vibrate the molding sand 102 through the vacuum vibrating table 120 and scrape the molding sand 102 Spread a film 103 on the surface and keep the molding sand 102 in vacuum;

[0078] S33, release the vacuum of the vacuum vibrating table 120, hold up the sand box 101 and take off the molding mold 140, turn over the sand box 101, the molding san...

Embodiment 2

[0089] see Figure 7 , Embodiment 2 of the present invention provides a method for forming a ceramic green body, which includes the following steps:

[0090] S40, calculating the size of the molding die 140 according to the ceramic product that needs to be formed, and determining the parting surface according to the shape of the ceramic body, the molding die 140 is divided into an upper mold 142 and a lower mold 144 by the parting surface;

[0091] S41, placing the upper mold 142 and the lower mold 144 on the vacuum vibration table 120 respectively, and laying a coating film 103 on the surface of the upper mold 142 and the lower mold 144, so that the coating 103 is attached to the upper mold 142 and the lower mold 144 surfaces;

[0092] S42, set a sprue and a riser core on the surface of the upper mold 142, place the sand box 101 on the vacuum vibration table 120 and cover the upper mold 142 and the lower mold 144 respectively, and then fill the sand box 101 with molding sand...

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Abstract

The invention relates to a greenware body moulding method. The method comprises the steps of providing a sand box, wherein moulding sand is arranged in the sand box, and the sand box is sealed through a covering membrane; preparing a sand mould with the sand box through a vacuumizing method, wherein the sand mould is composed of the moulding sand, defining a mould cavity, and covering the mould cavity through the covering membrane; pouring gel ceramic slurry into the mould cavity of the sand mould, wherein the ceramic slurry is isolated from the moulding sand through the covering membrane, curing the gel ceramic slurry by heating the moulding sand, and obtaining a greenware body prefabricated body; dispersing the sand mould, drying the greenware body prefabricated body, and obtaining a greenware body.

Description

technical field [0001] The invention relates to a molding method of a ceramic blank, in particular to a molding method of a ceramic blank based on wet molding. Background technique [0002] At present, the molding methods of ceramic blanks are mainly divided into dry molding and wet molding. Commonly used dry pressing and cold isostatic pressing belong to the category of dry forming in ceramic forming. Their disadvantages are that they can only form ceramic products with simple shapes, and the investment cost of equipment is high, and the amount of post-processing is large. [0003] In the wet molding of ceramic molding, ceramic gel injection molding technology is one of the widely researched ceramic molding methods at present. This technology can realize the near-net size molding of the ceramic body through the in-situ solidification of the high-solid-content ceramic slurry. It has the advantages of high and uniform molding density, high body strength, and the ability to p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B13/06
CPCB28B1/14B28B13/06
Inventor 齐龙浩叶志强
Owner TSINGHUA UNIV
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