Ceramic earphone and manufacturing method thereof

A manufacturing method and technology for earphones, applied in the field of ceramic materials, can solve the problems of long production cycle, slow release, high carbon residue rate and pollute the environment, and achieve the effects of avoiding softening and deformation, increasing degreasing speed and shortening process cycle.

Active Publication Date: 2015-01-21
SHENZHEN SUNTECH ADVANCED CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wax base itself needs to be degreased at high temperature for a long time because of its large internal stress and slow release, and the green embryo is prone to defects such as collapse and deformatio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] In this example 1, the ceramic powder is used as zirconia; the organic binder includes 80 parts by mass of POM, 15 parts of PE, 16 parts of EVA, 14 parts of PW, and 8 parts of SA.

[0031] S10, weigh 240 g of zirconia ceramic powder and 60 g of organic binder for mixing and batching.

[0032] S20, the mixed material in step S10 is placed in a mixer for pressure stirring, so that it is fully mixed to obtain a uniform mixed slurry.

[0033] S30, put the slurry kneaded in step S20 into a granulator for granulation, the granulation temperature is 200°C, and the granulation size is set to 5 mm.

[0034] S40, the granulation obtained in step S30 is injection-molded with an injection molding machine with the aid of an injection mold to generate a green embryo of a predetermined shape; wherein the injection temperature is 200° C., and the injection pressure is 60 Mpa; and then the green embryo is placed for a period of time to stabilize forming. In this st...

Example Embodiment

[0037] Example 2

[0038] In this Example 2, the ceramic powder is used as zirconia; the organic binder includes 60 parts by mass of POM, 18 parts of PE, 18 parts of EVA, 18 parts of PW, and 9 parts of SA.

[0039] S10, take 270g of zirconia ceramic powder and 30g of organic binder for mixing and ingredients.

[0040] S20, the mixed material in step S10 is placed in a mixer for pressure stirring, so that it is fully mixed to obtain a uniform mixed slurry.

[0041] S30, put the slurry kneaded in step S20 into a granulator for granulation, the granulation temperature is 150°C, and the granulation size is set to 8 mm.

[0042] S40, the granulation obtained in step S30 is injection-molded with an injection molding machine with the aid of an injection mold to generate a green embryo of a predetermined shape; wherein the injection temperature is 300° C., and the injection pressure is 60 Mpa; and then the green embryo is left for a period of time to stabilize forming. In this step...

Example Embodiment

[0045] Example 3

[0046] In this Example 2, the ceramic powder is used as zirconia; the organic binder includes 90 parts by mass of POM, 11 parts of PE, 11 parts of EVA, 12 parts of PW, and 7 parts of SA.

[0047] S10, take 250 g of zirconia ceramic powder and 50 g (the total amount is 300 g, and the amount of the binder is between 10 and 20%) organic binder for mixing and batching.

[0048] S20, the mixed material in step S10 is placed in a mixer for pressure stirring, so that it is fully mixed to obtain a uniform mixed slurry.

[0049] S30, put the slurry kneaded in step S20 into a granulator for granulation, the granulation temperature is 300°C, and the granulation size is set to 6 mm.

[0050] S40, the granulation obtained in step S30 is injection-molded with an injection molding machine with the aid of an injection mold to generate a green embryo of a predetermined shape; wherein the injection temperature is 150° C., and the injection pressure is 80 Mpa; and then the gr...

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PUM

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Abstract

The invention provides a method for manufacturing a ceramic earphone. The method comprises the following steps: pressurizing and mixing ceramic powder and an organic adhesive to form slurry, wherein the organic adhesive comprises 60-90 mass parts of POM, 10-20 mass parts of PE, 10-20 mass parts of EVA, 10-20 mass parts of PW and 5-10 mass parts of SA; extruding and granulating the slurry, thereby obtaining injection molding particles; performing injection molding on the injection molding particles by using a ceramic earphone mold, and generating a green body; performing catalytic degreasing on the green body, wherein the catalyst refers to 50-90 percent of nitric acid in the catalytic degreasing step; and sintering the degreased green body. According to the method disclosed by the invention, the organic adhesive with the components is adopted, and catalytic degreasing is performed in the subsequent step by using nitric acid, so that the production cycle is greatly shortened, the defects such as softening deformation and cracking are overcome, and the yield is improved.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a ceramic earphone and a manufacturing method thereof. Background technique [0002] The existing ceramic earphones are all made of wax-based oil extraction and feeding, and then injection molding is performed. Among them, the wax base can be heated repeatedly, and its thermal degradability in the degreasing stage can be adjusted according to the molecular weight and distribution, so it is most commonly used as an injection molding feed for ceramic earphone products. However, the wax base itself needs to be degreased at high temperature for a long time because of its large internal stress and slow release, and the green embryo is prone to defects such as collapse and deformation during the degreasing process. Therefore, the above-mentioned existing methods lead to long production cycles, The disadvantages of low yield (easy to crack) and high carbon residue...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
CPCC04B35/48C04B35/63408C04B35/63416C04B35/63472C04B2235/48
Inventor 王明明谭毅成向其军武彦辉
Owner SHENZHEN SUNTECH ADVANCED CERAMICS
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