High-molecular composite powder material for SLS and preparation method therefor

A composite powder and polymer technology, which is applied in the field of polymer composite powder materials of SLS and its preparation, can solve the problems of poor absorption of fiber lasers and limited application, and achieve the effects of improved precision of parts, easy implementation and simple process.

Active Publication Date: 2014-04-09
ZRAPID TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most polymer powders have poor absorption at the wavelength (1.06 μm) of fiber lasers, which limits its application in SLS technology

Method used

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  • High-molecular composite powder material for SLS and preparation method therefor
  • High-molecular composite powder material for SLS and preparation method therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Dry nylon 12 powder in advance, add 1000 g of nylon 12 powder into a vertical mechanical stirrer, then add 30 g of laser absorber, 2 g of flow aid, and 2 g of antioxidant in sequence, and stir and mix for 1.5 h. Take out the homogeneously mixed polymer composite powder and pass through a 150-mesh sieve to obtain a nylon composite powder material that can be formed by fiber laser for SLS. The morphology of the obtained composite powder material is shown in figure 1 , it can be seen in the figure that there are fine particles attached to the polymer powder particles, which shows that this method can produce a uniformly mixed composite powder material. Using the composite powder material as the molding material, the sintering process parameters are as follows: fiber laser power 4W, scanning speed 1000 mm / s, sintering distance 0.1 mm, sintering layer thickness 0.1 mm, the surface morphology of the obtained molding is shown in figure 2 , it can be seen in the figure that t...

Embodiment 2

[0029] Dry the polystyrene powder in advance, add 1000 g of polystyrene powder into a vertical mechanical stirrer, then add 20 g of laser absorber, 2 g of flow aid, and 3 g of antioxidant in sequence, and stir and mix for 1.5 h, take out the homogeneously mixed polymer composite powder and pass through a 150-mesh sieve to obtain a polystyrene composite powder material that can be formed by SLS with a fiber laser.

[0030] The polymer composite powder material for SLS and its preparation method are simple, environmentally friendly, and easy to implement, and can obtain a polymer composite powder material with excellent molding performance, and the polymer composite powder material prepared by the present invention can use optical fiber The laser is used for SLS forming, and the precision of the parts has been effectively improved, which has effectively promoted the application and development of SLS technology in various fields. The parts formed by SLS technology have excellent ...

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Abstract

The invention discloses a high-molecular composite powder material for SLS. The composite powder material comprises the following ingredients, by weight, 85%-99% of high-molecular powder, 0.1%-10% of laser absorbents, 0.1%-3% of flow promoters and 0.1%-2% of anti-oxidants. The preparation method for the composite powder material is advantaged by simple technology, environmental protection and easy implementation, and a high-molecular composite powder material with excellent molding performances can be obtained. The composite powder material can perform SLS molding through a fiber laser, the product precision is improved effectively, and application of the SLS technology in many fields is promoted.

Description

technical field [0001] The invention relates to a polymer composite powder material, in particular to a polymer composite powder material used for SLS and a preparation method thereof. Background technique [0002] Selective Laser Sintering (SLS) technology is a rapid prototyping method that uses laser as a processing heat source to sinter powder materials to form three-dimensional solids. In essence, powder materials absorb laser energy to increase their temperature, melt, curing, so as to achieve the purpose of molding. It is a new digital molding technology based on the principle of discrete / accumulation molding. With the aid of computer-aided design and manufacturing, it can directly mold solid powder materials into three-dimensional solid parts. One of the most widely used rapid prototyping technologies at present. Theoretically, any powder material that can absorb laser energy and reduce its viscosity can be used as a molding material for SLS, covering polymers, cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L25/06C08K13/02C08K3/22C08K3/36C08K3/34C08K5/13C08K5/526
CPCC08K13/02C08L23/06C08L23/12C08L25/06C08L27/06C08L27/18C08L29/04C08L33/12C08L55/02C08L61/06C08L61/16C08L63/00C08L67/04C08L69/00C08L75/04C08L77/00C08L91/06C08L77/02
Inventor 周宏志
Owner ZRAPID TECH CO LTD
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