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Preparation of a laser sintering 3D printing rapid prototyping alumina powder

A technology for molding alumina and alumina powder, which is applied in ceramic molding machines, manufacturing tools, additive processing, etc., can solve the problems of large shrinkage of parts and affect the dimensional accuracy of parts, and achieve high molding precision and improved absorption efficiency , The effect of low-carbon and environmentally friendly energy

Inactive Publication Date: 2017-04-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The higher the binder ratio, the easier the sintering, but the shrinkage of the parts is relatively large during the post-processing process, which will affect the dimensional accuracy of the parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Pretreatment of alumina powder: In the reactor, add ethyl acetate: 58 mL, distearoyloxyisopropyl aluminate: 13g, stir and dissolve, then add alumina powder: 35g, strong Stir and react at a constant temperature of 40±2°C for 7 hours, after cooling, filter, wash and dry to obtain pretreated alumina powder;

[0025] (2) Preparation of alumina powder for laser sintering 3D printing rapid prototyping: In the grinder, add separately, process alumina powder: 87g, thermoplastic phenolic resin: 3g, perchlorethylene resin: 3g, carbon powder: 4g, start grinding Machine speed at 320 rpm, grind for 5 min, then add acetone: 4 mL, mill speed at 320 rpm, grind for 70 min, and dry to obtain laser sintering 3D printing rapid prototyping alumina powder, the obtained laser sintering 3D The particle size of the printed rapid prototyping alumina powder is in the range of 0.5-2.0 μm.

Embodiment 2

[0027] (1) Pretreatment of alumina powder: In the reactor, add ethyl acetate: 62 mL, distearoyloxyisopropyl aluminate: 10 g, stir and dissolve, then add alumina powder: 34 g, strong Stir and react at a constant temperature of 40±2°C for 6 hours, after cooling, filter, wash and dry to obtain pretreated alumina powder;

[0028](2) Preparation of alumina powder for laser sintering 3D printing rapid prototyping: In the grinder, add separately, process alumina powder: 85g, thermoplastic phenolic resin: 5g, perchlorethylene resin: 5g, carbon powder: 2g, start grinding The speed of the machine is 320 rpm, grinding for 5 min, then adding acetone: 10 mL, the speed of the grinder is 320 rpm, grinding for 60 min, and drying to obtain laser sintering 3D printing rapid prototyping alumina powder, the obtained laser sintering 3D The particle size of the printed rapid prototyping alumina powder is in the range of 0.5-2.0 μm.

Embodiment 3

[0030] (1) Pretreatment of alumina powder: In the reactor, add ethyl acetate: 53 mL, distearoyloxyisopropyl aluminate: 12g, stir and dissolve, then add alumina powder: 40g, strong Stir and react at a constant temperature of 40±2°C for 8 hours, after cooling, filter, wash and dry to obtain pretreated alumina powder;

[0031] (2) Preparation of alumina powder for laser sintering 3D printing rapid prototyping: In the grinder, add separately, process alumina powder: 90g, thermoplastic phenolic resin: 2g, perchlorethylene resin: 2g, carbon powder: 3g, start grinding Machine speed is 320 rpm, grind for 5min, then add acetone: 7mL, grinder speed is 320 rpm, grind for 65min, and dry to obtain laser sintering 3D printing rapid prototyping alumina powder, the obtained laser sintering 3D printing The particle size of the rapid prototyping alumina powder is in the range of 0.5-2.0 μm.

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Abstract

The invention discloses a preparation method of laser sintering 3D printing rapid prototyping alumina powder, which is characterized in that distearoyloxyisopropyl aluminate is used to pretreat the alumina powder in ethyl acetate solvent, Obtain pretreated alumina powder; then, in the grinder, add according to mass percentage, treated alumina powder: 84%~90%, thermoplastic phenolic resin: 2%~5%, perchlorethylene resin: 2%~5% , carbon powder: 1.0%~6%, turn on the grinder at 320 rpm, grind for 5 minutes, then add acetone: 2%~8%, the sum of each component is 100%, and the grinder rotates at 320 rpm, Grinding for another 60-80 minutes and drying to obtain laser sintering 3D printing rapid prototyping alumina powder. The material can be directly formed under laser sintering, has high forming precision, high temperature resistance, simple preparation process, easy control of conditions, low production cost and easy industrial production.

Description

technical field [0001] The invention relates to a preparation method for laser sintering rapid prototyping powder material, which belongs to the field of rapid prototyping materials, in particular to the preparation and application of laser sintering 3D printing rapid prototyping alumina powder. Background technique [0002] 3D printing (3D printing) is a method based on digital model files, using fluid, powder, wire (rod) and other materials that can be cured, bonded, and fused, and solidified, bonded, and fused layer by layer. techniques for constructing objects. It is often used to make models in the fields of mold manufacturing and industrial design, and is gradually used in the direct manufacture of some products. There are already parts printed using this technology. The technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic infor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/00B33Y40/00
CPCB28B1/001C04B35/10C04B35/6261C04B35/6264C04B35/632C04B35/6325C04B35/63436C04B2235/422C04B2235/48
Inventor 李慧芝张培志曹冲王英姿丁月媛
Owner UNIV OF JINAN
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