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Nylon composite powder material for selective laser sintering

A composite powder and laser sintering technology, which is applied in the field of nylon composite powder materials, can solve problems that limit the application and development of SLS technology, and achieve excellent SLS molding effects, good dimensional stability, and excellent mechanical properties.

Active Publication Date: 2012-02-01
HUNAN FARSOON HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the above studies involved reports on glass beads modified nylon materials based on SLS technology, and the defects of existing technologies limit the application and development of SLS technology.

Method used

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  • Nylon composite powder material for selective laser sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Get 300 grams of γ-aminopropyltriethoxysilane, dissolve it in 9700 grams of ethanol / water (mass ratio 95:2) mixed solvent to obtain a solution with a mass concentration of 2%; get 4000 grams of solid glass beads, add to the above solution, mixed evenly, dried at room temperature for 2 days, and then dried at 65°C for 2 hours, ball milled, and passed through a 250-mesh sieve to obtain solid glass beads with organic surface treatment;

[0024] Take 1750 grams of the above-mentioned glass microspheres and add them to the mechanical stirrer, then add 3250 grams of nylon 12 powder, 40 grams of flow aid, 40 grams of light absorber, and 40 grams of antioxidant to the stirrer, stir evenly, and pass 150 grams. Mesh sieve to obtain nylon composite powder material.

[0025] The nylon composite powder material obtained above was molded on SLS equipment, and the preparation process parameters were: laser power 12W, scanning speed 2000mm / s, sintering distance 0.1mm, sintering layer t...

Embodiment 2

[0027] Get 300 grams of γ-aminopropyltriethoxysilane, dissolve in 9700 grams of ethanol / water (mass ratio 95: 2) mixed solvent to obtain a solution with a mass concentration of 3%; get 4000 grams of solid glass beads, add to the above solution, mixed evenly, dried at room temperature for 2 days, and then dried at 65°C for 2 hours, ball milled, and passed through a 250-mesh sieve to obtain solid glass beads with organic surface treatment;

[0028] Take 2250 grams of the above-mentioned glass microspheres and add them to the mechanical stirrer, then add 2750 grams of nylon 12 powder, 45 grams of flow aid, 45 grams of light absorbing agent, and 45 grams of antioxidant to the stirrer, stir evenly, pass 150 Mesh sieve to obtain nylon composite powder material.

[0029] The nylon composite powder material obtained above was molded on SLS equipment, and the preparation process parameters were: laser power 12W, scanning speed 2000mm / s, sintering distance 0.1mm, sintering layer thickne...

Embodiment 3

[0031] Get 300 grams of γ-aminopropyltriethoxysilane, dissolve it in 9700 grams of ethanol / water (mass ratio 95:2) mixed solvent to obtain a solution with a mass concentration of 3%; get 4000 grams of solid glass microspheres, add to the above solution, mixed evenly, dried at room temperature for 2 days, and then dried at 65°C for 2 hours, ball milled, and passed through a 250-mesh sieve to obtain solid glass beads with organic surface treatment;

[0032] Take 2750 grams of the above-mentioned glass microspheres and add them to the mechanical stirrer, then add 2250 grams of nylon 12 powder, 45 grams of flow aid, 45 grams of light absorbing agent, and 45 grams of antioxidant to the stirrer, stir evenly, pass 150 Mesh sieve to obtain nylon composite powder material.

[0033] The nylon composite powder material obtained above was molded on SLS equipment, and the preparation process parameters were: laser power 12W, scanning speed 2000mm / s, sintering distance 0.1mm, sintering laye...

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Abstract

The invention discloses a nylon composite powder material for selective laser sintering (SLS). The nylon composite powder material comprises the following components: nylon resin powder, solid glass beads, a coupling agent, a light absorber, a flow aid and an antioxidant. The nylon composite powder material has good mechanical properties and forming effect; and the obtained SLS formed piece has high dimensional stability, the tensile strength and bending strength of the SLS formed piece are improved, the bending modulus is improved by 60-70 percent particularly, the cost of the material is reduced by over 30 percent, a preparation process for the material is simple, environment-friendly and pollution-free, and the nylon composite powder material is a novel nylon composite powder material having high performance, low cost and no pollution and suitable for SLS.

Description

technical field [0001] The invention relates to a polymer composite material, in particular to a nylon composite powder material for selective laser sintering. Background technique [0002] In the Selective Laser Sintering (SLS) process, the powder material is the key factor affecting the performance of the part. At present, the polymer nylon powder material is the most widely used raw material in the field of SLS manufacturing. Its parts have high density, With good mechanical properties, it can be widely used in aerospace engineering, national defense and military products, architectural engineering models, machinery manufacturing, art production and other fields. However, the pure nylon powder material has certain limitations in performance, and the price is relatively expensive. Glass fibers are commonly used in industry to enhance and modify polymer materials. For example, patent CN101348609 modifies nylon powder materials by adding glass fibers and other components, w...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L77/02C08L77/06C08K13/06C08K9/06C08K7/20
Inventor 许小曙周红卫孙昊昱袁凯陈礼
Owner HUNAN FARSOON HIGH TECH CO LTD
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