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A method of selective laser sintering for ultra-high molecular weight polyethylene

A selective laser sintering, ultra-high molecular weight technology, applied in ceramic molding machines, processing and manufacturing, solid material additive processing, etc., to achieve high dimensional accuracy and small deformation and shrinkage.

Active Publication Date: 2017-10-24
安徽隆源成型科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, although UHMWPE is used in medical treatment, most of them are standard parts produced by the traditional mold method, and the prior art of using UHMWPE to prepare personalized medical parts does not involve

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  • A method of selective laser sintering for ultra-high molecular weight polyethylene
  • A method of selective laser sintering for ultra-high molecular weight polyethylene
  • A method of selective laser sintering for ultra-high molecular weight polyethylene

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Embodiment Construction

[0031] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.

[0032] UHMWPE is a crystalline polymer material with a molecular weight of more than one million, poor fluidity of processed melt, high viscosity, and large shrinkage and deformation after molding. These all limit the application of SLS molding of UHMWPE. The inventor analyzed the factors that affect UHMWPE. After many factors of SLS molding, the following technical solutions are obtained. In a specific embodiment, a selective laser sintering molding method of ultra-high molecular weight polyethylene includes the following steps:

[0033] (1) heating the ultra-high molecular weight polyethylene powder to the preheating temperature in the selective laser sintering molding equipment;

[0034] (2) Using a predetermined laser scanning speed and output power to form the ultra-high molecular weight polyethylene powder in a selectiv...

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Abstract

The invention discloses an area-selected laser sintering molding method of ultra-high molecular weight polyethylene, which comprises the following steps: (1) heating ultra-high-molecular-weight polyethylene powder to a preheating temperature in an area-selective laser sintering molding equipment; (2) using Predetermined laser scanning speed and output power make the ultra-high molecular weight polyethylene powder formed in the selective laser sintering molding equipment to obtain a molded part; (3) take out the molded part and keep it warm at a temperature of 110-130 ° C for 8 ~12h, and then cooled to obtain molded parts of ultra-high molecular weight polyethylene. The molded parts of ultra-high molecular weight polyethylene formed by the method of the invention have high mechanical properties and dimensional accuracy, and small deformation and shrinkage, and are especially suitable for the manufacture of medical aids.

Description

technical field [0001] The invention belongs to the technical field of 3D printing and molding, and in particular relates to an area-selective laser sintering molding method of ultra-high molecular weight polyethylene. Background technique [0002] Selective Laser Sintering (Selective Laser Sintering, referred to as SLS, also known as Selective Laser Sintering), as one of the mainstream 3D printing technologies, was first invented and patented by Dr. Carl Deckard of the University of Texas in the mid-1980s. Commercialized by DTM Corporation (acquired by 3D Systems). SLS uses powder materials as raw materials, lasers as heat sources, and adopts the principle of layering-superposition to directly manufacture three-dimensional entities from CAD models. The process parameters of this technology mainly include: laser power, scanning speed and spacing, preheating temperature and layer thickness. The advantage of SLS lies in the wide selection of raw materials, which can be vario...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/153B28B1/00B33Y10/00
Inventor 李子夫程明赵君杰侯璟崑
Owner 安徽隆源成型科技有限公司