Load bearing board and degreasing technology of zirconia ceramic injection molding blank and application thereof

The technology of zirconia ceramics and degreasing process is applied in the field of degreasing process of setter plate and zirconia ceramic injection molding embryo body, which can solve the problems of large deformation, cracking, and unstable shrinkage of injection molding embryo body, and achieve the effect of improving strength

Pending Publication Date: 2019-04-19
LENS TECH CHANGSHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide a setter to alleviate the large deformation, cracking, insufficient glue removal or shrinkage of the injection molded body caused by the use of the setter in the prior art to degrease the injection molded body of zirconia ceramics unstable problem

Method used

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  • Load bearing board and degreasing technology of zirconia ceramic injection molding blank and application thereof
  • Load bearing board and degreasing technology of zirconia ceramic injection molding blank and application thereof
  • Load bearing board and degreasing technology of zirconia ceramic injection molding blank and application thereof

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Effect test

Embodiment approach

[0092] As a preferred embodiment of the present invention, the degreasing process of the zirconia ceramic injection molded body includes the following steps:

[0093] Step a): preheating: the zirconia ceramic injection molded body is gradually heated from room temperature to 130-145° C. over 3-5 hours to complete the preheating of the zirconia ceramic injection molded body;

[0094] Step b): pre-degreasing: heat preservation in the range of 130-145°C for 1-4h to complete pre-degreasing;

[0095] Step c): degreasing: after the pre-degreasing is completed, the temperature is gradually raised to 300-310° C. over 17-32 hours to complete the degreasing process of the zirconia ceramic injection molded body;

[0096] Step d): pre-firing: After the degreasing is completed, the temperature is gradually raised to 590-600° C. over 6-14 hours, and then kept for 1-3 hours to complete the pre-firing of the zirconia ceramic injection molded body;

[0097] Step e): Degreasing is completed af...

Embodiment 1

[0109] This embodiment is a setter, such as Figure 3-6 As shown, the shape of the base plate 10 of the setter plate is rectangular, and the specific size is 350 mm × 180 mm × 5 mm. On the base plate 10, 24 circular positioning bosses 11 with an outer diameter of 5 mm and a height of 1 mm are made, which are evenly distributed over the entire area according to the area. The surface of the substrate 10 (except for the code angle position); make a circular bearing platform 20 for placing the zirconia ceramic injection molded body, the specific dimensions of the bearing platform 20 are: outer diameter 40mm, thickness 4.0mm, the upper Exhaust grooves 22 are opened on one side of the surface, the width of the exhaust grooves 22 is 1.0mm, the depth of the exhaust grooves 22 is 0.5mm, the number of exhaust grooves 22 is 5, and the spacing between two exhaust grooves 22 is equal. A circular positioning groove 21 is provided at the center of the lower surface of the carrying platform 2...

Embodiment 2

[0111] This embodiment is a degreasing process of zirconia ceramic injection molded embryo body for the back shell of a mobile phone, and the specific degreasing process curve refers to Figure 7 , including the following steps:

[0112] Step a): Preheating: first place the zirconia ceramic injection molded body on the setter provided in Example 1, and then place it in a heating furnace to gradually raise the temperature of the zirconia ceramic injection molded body from room temperature to 140°C over 4 hours Complete the preheating of the zirconia ceramic injection molded body;

[0113] Step b): pre-degreasing: heat preservation at 140°C for 1.5 hours to complete pre-degreasing;

[0114] Step c): degreasing: after the pre-degreasing is completed, the temperature is gradually raised to 300° C. over 25 hours to complete the degreasing process of the zirconia ceramic injection molded body;

[0115] Step d): pre-firing: After the degreasing is completed, the temperature is grad...

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Abstract

The invention provides a load bearing board and a degreasing technology of a zirconia ceramic injection molding blank and application thereof, and relates to the technical field of production and preparation of zirconia ceramic products. The load bearing board comprises a substrate. A load bearing platform used for placing the zirconia ceramic injection molding blank is arranged on the surface ofthe substrate. The load bearing platform protrudes from the surface of the substrate. By using the load bearing board, the problem that existing load bearing boards in the prior art are easy to causelarge deformation, cracking, insufficient glue discharge or unstable shrinkage of the injection molding blank during degreasing of the zirconia ceramic injection molding blank can be alleviated.

Description

technical field [0001] The invention relates to the technical field of production and preparation of zirconia ceramic products, in particular to a degreasing process of a setter and a zirconia ceramic injection molded body and its application. Background technique [0002] The main body of zirconia ceramic injection molding raw materials is divided into organic additives and oxide powders, which are formed by mixing, drying and granulating at a certain temperature. In the injection molding process, it is necessary to convert the material into a molten state by heating and have a certain degree of fluidity. Through the setting of the injection molding process, the cooperation of the injection molding machine and the mold, the molded body is obtained. Then the formed embryo body is degreased at low temperature by electric heating in the tunnel kiln. After leaving the kiln, the degreased embryo body is again sintered at high temperature by electric heating in the tunnel kiln, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/638C04B35/626C04B35/48
CPCC04B35/48C04B35/62645C04B35/638
Inventor 饶桥兵蔡重峰
Owner LENS TECH CHANGSHA
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