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Nylon composite material used for selective laser sintering and preparation method thereof

A nylon composite material and laser sintering technology are applied in the field of preparation of the nylon composite material, which can solve problems such as restricting development, and achieve the effects of low cost, weight reduction, excellent mechanical properties and molding effect.

Active Publication Date: 2012-01-11
HUNAN FARSOON HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the existing technologies is based on the SLS technical perspective, and adopts effective means to modify the nylon material, while ensuring the mechanical properties of the material, effectively reducing the material density, reducing the weight of the part, and improving the overall performance of the part; while aerospace and other high-end manufacturing The field puts forward requirements for materials with light weight, high strength, and good rigidity. For example, reducing the structural weight of an aircraft means increasing the carrying capacity, improving maneuverability, increasing flight distance or range, and reducing fuel or propellant consumption.
The defects of the existing technology limit the application and development of nylon composite materials and SLS technology in aerospace and other manufacturing fields that are highly sensitive to the weight of parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A. Surface treatment of hollow glass microspheres: prepare 2500 grams of γ-aminopropyltriethoxysilane, ethanol, and distilled water at a mass fraction of 3%, 95%, and 2% respectively 1,000 grams of hollow glass microspheres, and stir and mix them evenly with the above solution, dry at room temperature for 2 days, and then dry at 65°C for 2 hours, then ball mill and sieve to obtain hollow glass microspheres with surface organic treatment. Glass beads.

[0026] B. Blending: Weigh 300 grams of hollow glass microspheres obtained in step A, put them into a mechanical stirrer, add 4700 grams of nylon 12 powder, 50 grams of flow aid, 30 grams of light absorber and 30 grams of antioxidant , stirring the mixed material evenly, and sieving to obtain a nylon composite powder material.

[0027] Form the nylon composite powder material obtained in step B on the SLS forming equipment, and the preparation process parameters are: laser power 12W, scanning speed 2000mm / s, sintering dis...

Embodiment 2

[0029] A. Surface treatment of hollow glass microspheres: prepare 2500 grams of γ-aminopropyltriethoxysilane, ethanol, and distilled water at a mass fraction of 3%, 95%, and 2% respectively 1,000 grams of hollow glass microspheres, and stir and mix them evenly with the above solution, dry at room temperature for 2 days, and then dry at 65°C for 2 hours, then ball mill and sieve to obtain hollow glass microspheres with surface organic treatment. Glass beads.

[0030] B. Blending: Weigh 400 grams of hollow glass microspheres obtained in step A, put them into a mechanical stirrer, add 4600 grams of nylon 12 powder, 60 grams of flow aid, 35 grams of light absorber and 35 grams of antioxidant , stirring the mixed material evenly, and sieving to obtain a nylon composite powder material.

[0031] Form the nylon composite powder material obtained in step B on the SLS forming equipment, and the preparation process parameters are: laser power 12W, scanning speed 2000mm / s, sintering dis...

Embodiment 3

[0033] A. Surface treatment of hollow glass microspheres: prepare 2500 grams of γ-aminopropyltriethoxysilane, ethanol, and distilled water at a mass fraction of 3%, 95%, and 2% respectively 1,000 grams of hollow glass microspheres, and stir and mix them evenly with the above solution, dry at room temperature for 2 days, and then dry at 65°C for 2 hours, then ball mill and sieve to obtain hollow glass microspheres with surface organic treatment. Glass beads.

[0034] B. Blending: Weigh 500 grams of hollow glass microspheres obtained in step A, put them into a mechanical stirrer, add 4700 grams of nylon 12 powder, 70 grams of flow aid, 40 grams of light absorbing agent and 40 grams of antioxidant , stirring the mixed material evenly, and sieving to obtain a nylon composite powder material.

[0035] Form the nylon composite powder material obtained in step B on the SLS forming equipment, and the preparation process parameters are: laser power 12W, scanning speed 2000mm / s, sinter...

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PUM

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Abstract

The invention discloses a nylon composite material used for selective laser sintering (SLS). The nylon composite material comprises the components: nylon resin, hollow glass microbeads, a coupling agent, a flow promoter, a light absorber and an antioxidant. The invention also discloses a preparation method of the nylon composite material. When used for SLS shaping, the nylon composite material disclosed by the invention provides lower density while guaranteeing excellent mechanical properties and shaping effect, a shaped workpiece has lighter weight and has high specific strength and specific rigidity, and comprehensive properties of an SLS workpiece are effectively improved, thus the nylon composition material is especially applicable to the manufacturing fields of aviation, spaceflight and the like with high sensitivity to weight of a workpiece.

Description

technical field [0001] The invention relates to a nylon composite material used for selective laser sintering, and to a preparation method of the nylon composite material. Background technique [0002] Polymer nylon powder material is the most widely used raw material in the field of selective laser sintering (SLS) manufacturing. It can be used in automobile and aircraft engineering, national defense and military products, architectural engineering models, machinery manufacturing, art production and other industries. In order to further improve the performance of SLS formed products, chemical and physical methods can be used to modify nylon material (PA) to improve its SLS forming effect and the strength and toughness of products. Such as CN1379061 by adding fillers such as talcum powder and glass balls to modify the nylon powder material, the purpose is to improve the strength and toughness of the SLS parts, but did not adjust the equivalent density of the SLS composite mat...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L77/02C08L77/06C08K13/06C08K9/06C08K7/28
Inventor 许小曙周红卫袁凯孙昊昱边宏
Owner HUNAN FARSOON HIGH TECH CO LTD
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