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A 3D printing device for continuous fiber reinforced composite materials with a shearing mechanism

A technology for reinforcing composite materials and continuous fibers, applied in coating devices, additive processing, manufacturing auxiliary devices, etc., can solve the problem of non-cutting fibers, and achieve the effect of improving mechanical properties and saving fiber materials.

Active Publication Date: 2020-11-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a continuous fiber-reinforced composite material 3D printing device with a shearing mechanism in order to overcome the above-mentioned defects in the prior art. The rapid prototyping of structural parts is completed by stacking; the most important thing is to solve the limitation that the fibers cannot be cut during the 3D printing process of fiber-reinforced composite materials, so that the fibers and matrix materials can be based on the force flow characteristics (principal stress trajectory) of the printed structural parts. Compounding is required to reflect the anisotropy of the formed structural parts and improve the mechanical properties of the structural parts under actual working conditions

Method used

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  • A 3D printing device for continuous fiber reinforced composite materials with a shearing mechanism
  • A 3D printing device for continuous fiber reinforced composite materials with a shearing mechanism
  • A 3D printing device for continuous fiber reinforced composite materials with a shearing mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, a continuous fiber reinforced composite 3D printing device with a shearing mechanism includes a feed interface module, a fiber and matrix material composite module 3, a fiber cutting module, and an extrusion nozzle 6; the feed interface module serves as a connection; the fiber The matrix material composite module is used to melt the matrix material wire and composite with the fiber; the fiber cutting module is used to cut the fiber; the extrusion nozzle is used to extrude the material.

[0032] Such as figure 1 with image 3 As shown, the feed interface module includes a matrix material supply hose 1 and a connector 2, a fiber conduit 21. One end of the matrix material supply hose 1 is connected with a commonly used 3D printing wire feeding mechanism, and the other end passes through the connector 2. Insert the fiber and matrix material composite module 3, the connector 2 is connected to the feed port of the fiber and matrix material composite mod...

Embodiment 2

[0044] There are three inclined material guide holes arranged inside the fiber and matrix material composite module (3), and the three inclined material holes are equally divided along the circumference and intersect with the vertical material guide holes to form a vertical "four in one" Cavity.

[0045] The inclination angle of the inclined material guide hole is: the included angle with the vertical direction is 5°, the heating block and the heat dissipation block are detachably connected, and a heat insulating sheet is arranged between the heating block and the heat dissipation block. The rest is the same as in Example 1.

Embodiment 3

[0047] The number of the inclined guide holes is one, the inclination angle is 15°, and the rest are the same as in Embodiment 1.

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Abstract

The invention relates to a continuous fiber reinforced composite 3D printing device comprising a cutting-off mechanism. The continuous fiber reinforced composite 3D printing device comprises a feedingconnector module, a fiber and matrix material compositing module (3), a fiber cutting-off module and an extrusion nozzle (6). Compared with the prior art, compositing of fibers and a thermoplastic matrix material is achieved, and a structural member is rapidly molded by stacking a composite after extrusion; and most importantly, limitation that the fibers cannot be cut off in the fiber reinforcedcomposite 3D printing process is solved, thus, the fibers and the matrix material can be composited based on the requirement for force flow characteristics (a main stress trajectory line) of the printed structural member, the anisotropy of the molded structural member is reflected, and the mechanical properties of the structural member under actual working conditions are improved.

Description

Technical field [0001] The invention relates to the technical field of composite material 3D printing, in particular to a continuous fiber reinforced composite material 3D printing device containing a shearing mechanism. Background technique [0002] Fiber-reinforced composite materials are composite materials formed by reinforcing fiber materials, such as carbon fiber, glass fiber, aramid fiber, etc., and matrix materials through forming processes such as winding, molding or pultrusion. It has high specific strength and large specific modulus. Good molding process and other advantages. In the field of additive manufacturing 3D printing technology, the fiber is combined with thermoplastic or thermosetting matrix materials, and the rapid prototyping of structural parts is realized through layer-by-layer accumulation or layer-by-layer curing, which improves the mechanical properties of molded structural parts. In the future manufacturing industry The field has broad application pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/205B29C64/30B29C64/321B29C64/295B33Y30/00B33Y40/00
CPCB29C64/205B29C64/295B29C64/30B29C64/321B33Y30/00B33Y40/00
Inventor 王玉李帅帅李后起陈子谦
Owner TONGJI UNIV
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