Composite fiber material for FDM technology and preparation method of composite fiber material

A composite fiber and wire technology, applied in the field of additive manufacturing, can solve the problems of low product strength and difficult to use directly, and achieve the effects of improving shear modulus, strengthening axial connection strength, and improving radial tensile strength.

Inactive Publication Date: 2014-11-12
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional process, FDM technology can print products with complex structures quickly, eliminating the need for injection mold opening process. However, its product strength is relatively low and it is difficult to use directly

Method used

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  • Composite fiber material for FDM technology and preparation method of composite fiber material
  • Composite fiber material for FDM technology and preparation method of composite fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The present embodiment prepares the method for the composite fiber filament material of FDM technology, comprises the following steps:

[0030] Stp1: Take 90 parts of polystyrene, 10 parts of reinforced short carbon fiber filaments and a long carbon fiber filament core with a diameter of 10 μm;

[0031] Stp2: heating polystyrene to molten state;

[0032] Stp3: Add short carbon fiber filaments to molten polystyrene and mix well;

[0033] Stp4: Through the wire feeding mechanism, the long carbon fiber core passes through the mixed melt obtained in Stp3 at a constant speed of 0.5m / min, so that the mixed melt is evenly attached to the surface of the core;

[0034] Stp5: Control the hole diameter of the wire extrusion port, and finally obtain a composite wire with a diameter of 35-45 microns.

[0035] In this embodiment, the short reinforcing carbon fibers have a diameter of 0.3-0.8 μm and a length of ≤1 mm.

[0036] When the composite fiber filament prepared in this embo...

Embodiment 2

[0038] The present embodiment prepares the method for the composite fiber filament material of FDM technology, comprises the following steps:

[0039] Stp1: Take 80 parts of polypropylene, 20 parts of reinforced glass fiber and a wire core with a diameter of 18 μm;

[0040] Stp2: heating polypropylene to molten state;

[0041] Stp3: Add reinforced glass fiber to molten polypropylene and mix well;

[0042] Stp4: Through the wire feeding mechanism, the metal wire core passes through the mixed melt obtained in Stp3 at a constant speed of 0.8m / min, so that the mixed melt is evenly attached to the surface of the metal wire core;

[0043] Stp5: Control the hole diameter of the wire extrusion port, and finally obtain a composite wire with a diameter of 20-35 microns.

[0044] In this embodiment, the reinforced glass fiber has a diameter of 0.5-0.9 μm and a length of ≤1 mm.

Embodiment 3

[0046] The present embodiment prepares the method for the composite fiber filament material of FDM technology, comprises the following steps:

[0047] Stp1: Take 75 parts of polycarbonate, 25 parts of reinforced carbon nanotubes and a glass fiber core with a diameter of 6 μm;

[0048] Stp2: heating polycarbonate to molten state;

[0049] Stp3: Add reinforced carbon nanotubes to molten polycarbonate and mix well;

[0050] Stp4: Through the wire feeding mechanism, the glass fiber core passes through the mixed melt obtained from Stp3 at a constant speed of 0.3m / min, so that the mixed melt is evenly attached to the surface of the glass fiber core;

[0051] Stp5: Control the hole diameter of the wire extrusion port, and finally obtain a composite wire with a diameter of 30-45 microns.

[0052] In this embodiment, the reinforced carbon nanotubes have a diameter of 0.2-0.6 μm and a length of ≤1 mm.

[0053] The composite fiber filament of the present invention adds short fibers to...

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Abstract

The invention discloses a composite fiber material for the FDM technology. The composite fiber material comprises a fiber core and thermoplastic plastic wrapping the outer layer of the fiber core. The fiber core is glass fiber or carbon fiber or a metal wire, and the diameter of the fiber core ranges from 5 micrometers to 20 micrometers. The diameter of the fiber material ranges from 20 micrometers to 50 micrometers. The thermoplastic plastic wrapping the outer layer of the fiber core contains 5-30%wt of reinforcing fiber with the diameter of 0.1 micrometer to 1 micrometer and the length smaller than or equal to 1 mm. A method for preparing the composite fiber material includes the steps of firstly, heating the thermoplastic plastic to the molten state; secondly, adding the reinforcing fiber into the molten plastic and evenly mixing the reinforcing fiber with the molten plastic; thirdly, evenly attaching the mixed melt to the surface of the fiber core through a fiber sending mechanism; fourthly, obtaining the composite fiber material with the diameter of 20 micrometers to 50 micrometers through extruding and sizing. The short reinforcing fiber and the fiber core are added to the thermoplastic plastic, and therefore the attaching effect between interfaces of the molten fiber material can be enhanced, axial connection strength of all layers of a printed piece is enhanced, and the independent tensile strength of each layer in the radial direction can be improved as well.

Description

technical field [0001] The invention belongs to the field of additive manufacturing and relates to melt extrusion molding technology, in particular to a composite fiber filament material used in FDM technology and a method for preparing the composite fiber material. Background technique [0002] At present, additive manufacturing technology, that is, 3D printing technology is having an impact on traditional manufacturing. Fusion extrusion molding (FDM) technology is an important branch of additive manufacturing technology. It mainly uses thermoplastics as processing materials, which usually need to be pre-processed into filaments. The wire is fed into the nozzle by the wire feeding mechanism, heated, melted and extruded in the nozzle, and then quickly solidified and bonded with the surrounding materials. The nozzle moves along the cross-sectional contour of the part to fill layer by layer, so as to achieve the purpose of molding. Compared with the traditional process, FDM t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/18D01F8/10D01F8/06D01F8/16D01F8/14D01F1/10D01D5/34
Inventor 谭陆西黎静张代军
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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