Preparation method of injection molding mold and ceramic sheet, mobile phone cover plate and mobile phone back plate

A technology of injection molding and ceramic sheets, which is applied in ceramic molding machines, mold fixtures, mold auxiliary parts, etc., can solve problems such as increasing energy consumption, and achieve the effect of low energy consumption

Active Publication Date: 2019-01-18
SHENZHEN SUNTECH ADVANCED CERAMICS
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally, gel injection molding is suitable for the preparation of ceramic green sheets with a thickness of 0.6 mm to 10 mm. Since gel injection molding mainly relies on gravity as the power source, it requires more time to prepare ceramic green sheets with a thickness of less than 0.6 mm. A mold with a narrow cavity, and such a narrow cavity will make it difficult for the slurry to flow into the interior only under the action of gravity, and an external force needs to be applied to ensure the smooth inflow and flow rate of the slurry, which increases energy consumption

Method used

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  • Preparation method of injection molding mold and ceramic sheet, mobile phone cover plate and mobile phone back plate
  • Preparation method of injection molding mold and ceramic sheet, mobile phone cover plate and mobile phone back plate
  • Preparation method of injection molding mold and ceramic sheet, mobile phone cover plate and mobile phone back plate

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preparation example Construction

[0041] like figure 2 Shown, the preparation method of the mobile phone cover plate of one embodiment, comprises the following steps:

[0042] Step S210: preparing a ceramic sheet.

[0043] Among them, such as image 3 As shown, the preparation method of the ceramic sheet in step S210 is as follows:

[0044] Step S212: providing a ceramic slurry with a viscosity of 100 mPa·s˜5000 mPa·s.

[0045] In this example, the preparation steps of the ceramic slurry are: mixing organic monomers, crosslinking agents, dispersants, solvents and ceramic powders, and then adding catalysts and initiators to form ceramic slurry.

[0046] Wherein, the step of mixing the organic monomer, cross-linking agent, dispersant, solvent and ceramic powder is specifically: mixing the organic monomer, cross-linking agent, dispersant and solvent, and adjusting the pH value to 9-10 to obtain Pre-preparation liquid: add ceramic powder to the pre-preparation liquid and mix, then add catalyst and initiator ...

Embodiment 1

[0070] The preparation process of the ceramic sheet of the present embodiment is as follows:

[0071] (1) Stir and mix acrylamide, N,N'-methylenebisacrylamide and ammonium polyacrylate with deionized water, adjust the pH value to 9 with ammonia water, and obtain a pre-preparation solution, wherein, in the pre-preparation solution , the mass percentage of acrylamide is 15%, the mass percentage of ammonium polyacrylate is 3%, and the mass ratio of acrylamide to N,N'-methylenebisacrylamide is 25:1.

[0072] (2) After mixing 3 / 5 of the zirconia powder with the pre-prepared solution for 30 minutes, add the remaining 2 / 5 of the zirconia powder, continue ball milling for 21 hours, and then vacuumize and degas for 20 minutes , and then, under the condition of 25° C., the catalyst and the initiator were sequentially added and stirred for 1 minute respectively to obtain a ceramic slurry with a viscosity of 100 mPa·s. Wherein, the catalyst is N,N,N',N'-tetramethylethylenediamine, and th...

Embodiment 2

[0078] The preparation process of the ceramic sheet of the present embodiment is as follows:

[0079] (1) Stir and mix acrylamide, N,N'-methylenebisacrylamide and ammonium polyacrylate with deionized water, adjust the pH value to 9 with ammonia water, and obtain a pre-preparation solution, wherein, in the pre-preparation solution , the mass percentage of acrylamide is 15%, the mass percentage of ammonium polyacrylate is 3%, and the mass ratio of acrylamide to N,N'-methylenebisacrylamide is 25:1.

[0080] (2) After mixing 3 / 5 of the zirconia powder with the pre-prepared solution for 30 minutes, add the remaining 2 / 5 of the zirconia powder, continue ball milling for 18 hours, and then vacuumize and degas for 20 minutes , and then, under the condition of 22° C., the catalyst and the initiator were sequentially added and stirred for 1 minute respectively to obtain a ceramic slurry with a viscosity of 5000 mPa·s. Wherein, the catalyst is N,N,N',N'-tetramethylethylenediamine, and the...

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Abstract

The invention relates to an injection molding die and a preparing method for a ceramic sheet, a mobile phone cover plate and a mobile phone back plate. The injection molding die comprises a first base plate, a second base plate and a cushion strip. The first base plate is provided with a flow guiding face, and the flow guiding face is provided with multiple flow guiding grooves so that the roughness of the flow guiding face can range from 6.3 microns to 12.5 microns. The second base plate is used for being matched with the first base plate. The second base plate is provided with a smooth face used for being opposite to the flow guiding face. The cushion strip is used for being clamped between the first base plate and the second base plate and can be detachably and fixedly connected with the first base plate and the second base plate. A die cavity with an opening can be jointly defined by the cushion strip, the first base plate and the second base plate. When the cushion strip is fixedly connected with the first base plate and the second base plate, the smooth face of the second base plate is opposite to the flow guiding face of the first base plate, and the minimum distance between the smooth face and the flow guiding face ranges from 0.2 mm to 1.2 mm. By means of the above injection molding die, energy consumption can be reduced.

Description

technical field [0001] The invention relates to the technical field of ceramic material forming molds and ceramic products, in particular to an injection molding mold and a method for preparing ceramic sheets, a method for preparing a cover plate of a mobile phone, and a method for preparing a back plate of a mobile phone. Background technique [0002] Generally, gel injection molding is suitable for the preparation of ceramic green sheets with a thickness of 0.6 mm to 10 mm. Since gel injection molding mainly relies on gravity as the power source, it requires more time to prepare ceramic green sheets with a thickness of less than 0.6 mm. A mold with a narrow cavity, and such a narrow cavity will make it difficult for the slurry to flow into the interior only under the action of gravity, and an external force needs to be applied to ensure the smooth inflow and flow rate of the slurry, which increases energy consumption. Contents of the invention [0003] Based on this, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/14B28B7/00H04M1/02C04B35/622
CPCB28B1/14B28B7/0002B28B7/0014B28B7/0035C04B35/622H04M1/02
Inventor 黎景锋向其军林勇钊谭毅成韦灵尧陈强
Owner SHENZHEN SUNTECH ADVANCED CERAMICS
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