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Method for manufacturing injection molding zirconia products

A technology of injection molding and zirconia, which is applied in the direction of textiles and papermaking, can solve the problems that affect product quality and enterprise economic benefits, the surface is easy to pick up, and defective products occur, and it is not easy to burr, prolong the life of parts, and evenly mix materials. Effect

Inactive Publication Date: 2008-04-30
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the actual use process, due to the high-speed friction between the guide wheel and the wire, the surface is easy to rough and defective products appear, which affects the product quality and economic benefits of the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Heat the powder in an electric furnace at a heating rate of 3°C / min to 800°C for 5 hours. Prompt the particles to grow up, and the specific surface of the powder is reduced to 12m 2 / g or less. Then spray granulation. The bulk density of the granulated powder is 1.2g / cm 3 , the stacking angle is less than 30°.

[0026] 2. Prepare the binder according to the ratio of PP: EVA: PE: PW = 5: 5: 5: 5 (PP-polypropylene, EVA-ethylene vinyl acetate copolymer, PE polyethylene, PW-paraffin wax), melt and mix After cooling, mechanical crushing is carried out. Press binder with yttrium stabilized zirconia (Y 2 o 3 : ZrO 2 =5.4:94.6) at a ratio of 18:82, mechanically mixed at 140°C, and crushed after cooling. The pulverized injection material is granulated in the granulation equipment, and the granulated particles are small particles smaller than 4×4×4mm.

[0027] 3. Injection molding, the molding temperature is 140°C, the molding pressure is 10MPa, and the molding time i...

Embodiment 2

[0029] 1. Heat the powder to 900°C for 2 hours in an electric furnace at a heating rate of 8°C / min. Prompt the particles to grow up, and the specific surface of the powder is reduced to 12m 2 / g or less. Then spray granulation. The bulk density of the granulated powder is 1.2g / cm 3 , the stacking angle is less than 30°.

[0030] 2. Prepare the binder according to the ratio of PP: EVA: PE: PW=1:3:3:5 (PP-polypropylene, EVA-ethylene vinyl acetate copolymer, PE polyethylene, PW-paraffin wax), and mix them by melting After cooling, mechanical crushing is carried out. Press binder with yttrium stabilized zirconia (Y 2 o 3 : ZrO 2 =5.4:94.6) at a ratio of 18:82, mechanically mixed at 130°C, and crushed after cooling. The pulverized injection material is granulated in the granulation equipment, and the particle size is small particles less than 4×4×4mm.

[0031] 3. Injection molding, the molding temperature is 130°C, the molding pressure is 15MPa, and the molding time is 4s....

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PUM

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Abstract

A process for preparing the zirconium oxide product by injection moulding includes such steps as modifying the zirconium oxide nanoparticles by sintering at 700-1000 deg.C for 0.5-20 hrs, preparing adhesive from PP, EVA, PE and PW, proportionally mixing them together at 80-150 deg.C, granulating, injection moulding, and sintering at 1400-1600 deg.C for 1-3 hrs. Its product features high density, bending strength and hardness.

Description

technical field [0001] The invention relates to a method for manufacturing a guide wheel made of zirconia material in an injection molding process, in particular to a method for manufacturing a guide wheel using zirconia in the chemical fiber textile industry, and belongs to the field of textile machinery accessories. Background technique [0002] At present, the wire pulleys used in the chemical fiber textile industry are mostly made of Al 2 o 3 Ceramic preparation. For example, the publication numbers CN1242442A and CN1305975A all relate to a method for preparing Al by injection molding. 2 o 3 The guide wheel method. Due to the injection molding method, the molding pressure is high, the green body density is high, the hardness of the product after sintering is relatively high, the surface finish is high, and the product size accuracy is high. However, due to the inherent characteristics of alumina, its product strength, toughness and smoothness are far behind those of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01H13/04C04B35/48
Inventor 施剑林蒋丹宇徐兵汪霖
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI