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Spherical powder material for 3D printing and preparation method thereof

A spherical powder, 3D printing technology, applied in the field of 3D printing, can solve the problems that the fluidity is difficult to meet the requirements, the resin powder is easy to bond, and the sphericity of the 3D printing powder is not low, and it is easy to mass production, easy to emulsify, The effect of improving the finish

Active Publication Date: 2021-06-11
武汉芬睿德三维耗材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a spherical powder material for 3D printing and its preparation method, the purpose of which is to solve the problem of low sphericity of selective 3D printing powder, difficulty in meeting the requirements of fluidity and The technical problem that the resin powder is easy to stick during the emulsification process at elevated temperature

Method used

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  • Spherical powder material for 3D printing and preparation method thereof
  • Spherical powder material for 3D printing and preparation method thereof

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preparation example Construction

[0034] The present invention also provides a method for preparing a spherical powder material for 3D printing, comprising the following steps:

[0035] S1, the raw materials are mixed in the reactor, and then pulverized;

[0036] S2, heating up to 10°C-100°C above the melting point of the thermoplastic resin;

[0037] S3, cooling, separating, and drying to obtain a spherical powder product.

[0038] The preparation method of the spherical powder material for 3D printing in the present invention combines the advantages of the crushing method and the emulsification method. First, it is crushed in a solvent, which can reduce the temperature rise of the crushing and avoid the agglomeration of the bonded crushing tool and thermoplastic resin powder. , The thermoplastic resin powder is dispersed and emulsified in a modified silicone oil solvent (or a mixed solvent with low boiling point silicone oil), and after cooling, it can form a spherical structure and improve fluidity.

[0039...

Embodiment 1

[0047] Take 100 kg of low-density polyethylene (HDPE) resin, 250 kg of cyanosilicone oil, 100 kg of kerosene, and 2 kg of emulsifier into the emulsification kettle, heat it to about 100 degrees, start the emulsifier to shear and pulverize for 1.5 hours, and put it under the protection of nitrogen Gradually raise the temperature to about 160 degrees to emulsify for 4 hours, cool, separate with a bag centrifuge, wash with water, dry, sort and compound, and pack for shipment.

Embodiment 2

[0049] Take 100 kg of polypropylene resin, 250 kg of water-based silicone oil, 100 kg of methyl oil, and 2 kg of emulsifier into the emulsification kettle, heat to about 100 degrees, start the emulsifier to shear and pulverize for 4 hours, and gradually heat up to Emulsify at about 200 degrees for 5 hours, cool, continue solid-liquid separation, wash with water, dry, sort and compound, pack and ship.

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Abstract

The invention discloses a spherical powder material for 3D printing and a preparation method thereof. The raw materials for the preparation of the spherical powder material include thermoplastic resin, modified silicone oil, and an emulsifier, and the viscosity of the modified silicone oil is 600mpa·s~ 8000mpa·s, the mass fraction of the thermoplastic resin in the raw material is 1% to 40%; the preparation method includes: S1, mixing the raw materials in a reactor, and then pulverizing; S2, raising the temperature to the 10°C to 100°C above the melting point of the resin; S3, cooling, separating, and drying to obtain a powder product. The purpose of the present invention is to solve the technical problems of low sphericity of selective laser sintering printing powder, difficulty in meeting requirements of fluidity and easy bonding of resin powder during emulsification process of rising temperature.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and more specifically relates to a spherical powder material for 3D printing and a preparation method thereof. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. In recent years, with the maturity of Internet technology, it has developed relatively rapidly, but 3D printing consumables have encountered many difficulties, which has become a bottleneck for the development and popularization of 3D printing technology. [0003] The powder used in the selective laser sintering (SLS) process and three-dimensional printing (3DP) process in 3D printing requires a particle size of 10-100 microns, a spherical or near-spherical appearance, good surface finish, and good fluidity. This is conducive to powder spread...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/08C08L23/06C08L83/04C08L23/12C08L25/06C08L67/04C08L55/02C08L69/00C08L77/00B33Y70/00
CPCB33Y70/00C08L83/04C08L83/08C08L2205/025C08L2205/03C08L2207/066C08L23/06C08L23/12C08L25/06C08L67/04C08L69/00C08L77/00C08L55/02
Inventor 张玉红詹恩奇何培新王央贡戴纲刘东林付华
Owner 武汉芬睿德三维耗材有限公司
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