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Method for strengthening mechanical property of FDM 3D-printed piece

A 3D printing and high-performance technology, applied in the direction of 3D object support structure, additive manufacturing, manufacturing tools, etc., can solve the problems of FDM application range limitation, low bonding strength between layers, poor overall performance of parts, etc., and achieve easy batch operation , low cost of raw materials, and the effect of enhancing mechanical properties

Inactive Publication Date: 2017-09-15
福建科盛达科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the FDM molding method at this stage has essential defects
When the material is extruded from the high-temperature nozzle, it only relies on its own gravity to deposit on the cooled lower layer of material, and at the same time it is cooled rapidly to produce a certain shrinkage, resulting in a large gap between layers and a small bonding strength between layers. The overall performance of parts is poor, so the current FDM application range is greatly limited, mainly concentrated in handicrafts and hand-made industries

Method used

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  • Method for strengthening mechanical property of FDM 3D-printed piece
  • Method for strengthening mechanical property of FDM 3D-printed piece
  • Method for strengthening mechanical property of FDM 3D-printed piece

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Embodiment Construction

[0016] The content of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments of the description:

[0017] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following embodiments are described in detail together with the accompanying drawings.

[0018] Modified polyethylene wax is used as the matrix, its melt index is 19g / 10min, and its melting point is about 95°C; AkzoNobel Expancel 930DU120 thermally expandable microspheres are used, and its initial expansion temperature is 120°C. Add 2% expanded microspheres into the matrix, mix well, and prepare FDM 3D printing wire by twin-screw blending. The diameter of the wire is about 1.75mm.

[0019] Put the prepared wire into the FDM 3D printer for printing, printing parameters: nozzle temperature 100°C, nozzle diameter 0.5mm, height of each layer 0.2mm, filling degree 100%.

[0020] A flat press is used to hea...

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Abstract

The invention provides a method for strengthening the mechanical property of an FDM 3D-printed piece, and opens up a novel thinking for improving the mechanical property of the FDM 3D-printed piece. According to the technical scheme, when 3D print wire materials are prepared, thermal-expansion microspheres are added into a polymer matrix, the 3D-printed piece is heated in the later period to enable the microspheres to expand slightly to propel the matrix to move, so that gaps between deposited wires in the piece are reduced, and therefore the mechanical property is promoted.

Description

technical field [0001] The invention relates to a method for enhancing the mechanical properties of FDM 3D printing parts, belonging to the field of rapid prototyping materials. Background technique [0002] Rapid Prototyping (RP) technology is an advanced manufacturing technology developed rapidly in the 1990s, and it is a key technology serving the development of new products in the manufacturing industry. It plays a positive role in promoting product innovation of enterprises, shortening the cycle of new product development, and improving product competitiveness. Since the technology came out, it has gradually been widely used in the manufacturing industry of various countries in the world, and thus gave birth to a new technical field. As an emerging rapid prototyping technology, 3D printing technology is mainly used in the fields of product prototype, mold manufacturing, artistic creation, jewelry making, etc., to replace some traditional finishing processes in these fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/118B29C64/30B29C64/379B33Y40/00
CPCB33Y40/00
Inventor 王剑磊
Owner 福建科盛达科技有限公司
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