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High-molecular polymer powder material and preparation method thereof

A technology of high polymer and mixed powder materials, applied in the field of additive manufacturing, can solve the problems of poor surface quality and surface of sintered surface, inability to print fine structure, poor stability of sintering effect, etc., to prevent carbon black agglomeration, workpiece Good performance and the effect of improving fluidity

Active Publication Date: 2019-04-05
HUNAN FARSOON HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the problem of uniform mixing of thermal medium and high molecular polymer cannot be solved, the surface quality and surface of the sintered surface will be poor, and fine structures cannot be printed.
At the same time, due to the uneven mixing of the heat medium, the stability of the sintering effect is poor

Method used

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  • High-molecular polymer powder material and preparation method thereof
  • High-molecular polymer powder material and preparation method thereof
  • High-molecular polymer powder material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Add 20 parts of nylon 1010 powder with an average particle size of 60 μm and 1 part of carbon black with an average particle size of 80 nm into the mixing tank for stirring. The temperature of the mixing tank is kept at 30 ° C, and the stirring rate is 1500 r / min. The time is 1min, and the mixed powder of nylon 1010 carbon black is obtained;

[0034](2) The 20 parts of nylon 1010 carbon black mixed powder, 1 part of fumed silica and 80 parts of nylon 1010 powder are added to the powder mixing bucket, and sieved after a high-speed stirring process, with an average particle size of 60 μm, and high-speed stirring In the first stage, the temperature of the powder mixing tank was kept at 70°C, the stirring rate was 1500 rpm, and the stirring time was 1 min; in the second stage of high-speed stirring, the temperature of the powder mixing tank was kept at 40°C, the stirring rate was 600 rpm, and the stirring time was 1 minute. The time is 5 minutes, and a nylon 1010 polyme...

Embodiment 2

[0037] (1) Add 20 parts of nylon 6 powder with an average particle size of 75 μm and 5 parts of carbon black with an average particle size of 60 nm into the mixing tank for stirring. The temperature of the mixing tank is kept at 40 ° C, and the stirring rate is 2000 r / min. The time is 0.5min, and the mixed powder of nylon 6 carbon black is obtained;

[0038] (2) The 20 parts of nylon 6 carbon black mixed powder, 0.5 part of gas-phase titanium dioxide and 80 parts of nylon 6 powder are added to the powder mixing tank, and sieved after the high-speed stirring process, the average particle size is 75 μm, and the first high-speed stirring In the first stage, the temperature of the powder mixing tank was kept at 75°C, the stirring rate was 1400 rpm, and the stirring time was 1.5 min; in the second stage of high-speed stirring, the temperature of the powder mixing tank was kept at 35°C, the stirring rate was 700 rpm, and the stirring time was 4min to obtain nylon 6 polymer powder ma...

Embodiment 3

[0041] (1) Add 20 parts of thermoplastic polyurethane powder with an average particle size of 40 μm and 0.1 part of carbon black with an average particle size of 200 nm into the mixing tank for stirring. The temperature of the mixing tank is kept at 30 ° C, the stirring rate is 2000 r / min, and the stirring time is 5min, obtained thermoplastic polyurethane carbon black mixed powder;

[0042] (2) The 20 parts of thermoplastic polyurethane carbon black mixed powder, 0.1 part of meteorological aluminum oxide and 80 parts of thermoplastic polyurethane powder are added in the powder mixing bucket, and are sieved after adopting a high-speed stirring process. The average particle size is 40 μm, and the In the first stage of stirring, the temperature of the powder mixing tank was kept at 80°C, the stirring rate was 1200 rpm, and the stirring time was 20 minutes; in the second stage of high-speed stirring, the temperature of the powder mixing tank was kept at 30°C, and the stirring rate ...

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Abstract

The invention provides a preparation method of a high-molecular polymer powder material. The preparation method of the high-molecular polymer powder material comprises the following steps: adding 20 parts of a high-molecular powder material and 0.1-10 parts of carbon black in a stirring barrel and stirring at high speed for the first time to prepare a high-molecular carbon black mixed powder material; and adding the high-molecular carbon black mixed powder material, 0.1-1 part of a flow promoting agent and 80 parts of a high-molecular powder material in a powder mixing barrel, and sieving after stirring at high speed for a second time to obtain a high-molecular polymer powder material which is suitable for sintering of a fiber laser. By the high-speed stirring mode, carbon black is uniformly attached to the surface of powder, thus, the high-molecular powder material in the prior art is applied to sintering of the fiber laser, a workpiece is good in surface quality, the structure is exquisite, the comprehensive performance is excellent, and the types and application field of a sintering material of the fiber laser are expanded.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a polymer powder material and a preparation method thereof. Background technique [0002] The selective sintering of multiple powder layers by laser sintering is a method of manufacturing three-dimensional objects that allows three-dimensional entity. This method is primarily accomplished using thermoplastic polymers. Patents US6136948 and WO9606881 describe this method of manufacturing three-dimensional objects using powdered polymers in detail. [0003] The existing mainstream selective laser sintering mainly uses CO 2 The laser has a wavelength of 10600nm, which corresponds to the mid-infrared band. The polyamide powder material in the high molecular polymer has a high absorption rate in this range of wavelengths, while other polymers have poor absorption rates in this wavelength range, which makes it difficult to apply the existing high molecula...

Claims

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Application Information

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IPC IPC(8): C08J3/20C08J3/12C08K3/04C08L77/06C08L77/02C08L75/04C08L23/12C08L23/06C08L81/06C08L61/16B29B7/00B33Y70/00
CPCB29B7/005B33Y70/00C08J3/12C08J3/203C08J2323/06C08J2323/12C08J2361/16C08J2375/04C08J2377/02C08J2377/06C08J2381/06C08K3/04C08K2201/003
Inventor 许小曙鲍光文杰斌曾思齐徐文雅
Owner HUNAN FARSOON HIGH TECH CO LTD