3D printing forming method of continuous fiber reinforced member

A continuous fiber, 3D printing technology, applied in the field of 3D printing, can solve the problems of low printing success rate, easy to block the nozzle, and low production efficiency, and achieve the goals of wide applicability and combination, improved efficiency, and improved quality and performance Effect

Pending Publication Date: 2020-08-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the continuous fiber and photosensitive resin need to be pre-impregnated in advance, and then 3D printed and formed, the production efficiency is low, because the photosensitive resin is easily cured when exposed to light, thereby changing its chemical structure and forming a longer cross-linked polymer High polymer, easy to block the nozzle, resulting in low printing success rate

Method used

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  • 3D printing forming method of continuous fiber reinforced member
  • 3D printing forming method of continuous fiber reinforced member
  • 3D printing forming method of continuous fiber reinforced member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The invention provides a 3D printing molding method of a continuous fiber reinforced component, comprising the following steps:

[0047] Step 1. The photosensitive resin and the continuous fiber are fully contacted inside the extrusion head, so that the surface of the continuous fiber is wrapped with the photosensitive resin to form a composite precursor;

[0048] Step 2. Use the FDM-3D printing platform to synchronously carry out component molding;

[0049] Step 3. Under light conditions, the photosensitive resin is cross-linked and cured during the printing process, and the composite reinforcement of the continuous fiber and the photosensitive resin is completed, such as image 3 As shown, a continuous fiber reinforced component is obtained;

[0050] Such as Figure 1~2 As shown, the extrusion head includes a wire feeding device 1, a shearing device 2, an extrusion cavity 3 and a nozzle 4 arranged in sequence from top to bottom, and the wire feeding device 1 is prov...

Embodiment 2

[0055] Embodiment 2 (tough continuous fiber printing)

[0056] In this example, tough continuous fiber is used as the object, and continuous glass fiber is used, which is hard, has a certain degree of plasticity, and has a certain non-axial strength at the same time. It can directly use the FDM-3D printing platform for supply and printing. The specific steps are:

[0057] (1) Pass the continuous glass fiber through the first feeding end 101 on the frame 102, pass between the driving wheel 103 and the driven wheel 105 and clamp it, and the driving wheel 103 rotates under the control of the driving circuit to drive the continuous fiber forward Feeding, the fiber enters the inside of the extrusion cavity 3 through the extrusion cavity feed port 302;

[0058] (2) Load the peristaltic pump with photosensitive resin, connect the conduit to the second feed port 301, and fill the inside of the extrusion head with photosensitive resin;

[0059] (3) Load the printed device model into t...

Embodiment 3

[0061] Embodiment 3 (non-tough continuous fiber printing coated with photosensitive resin)

[0062] In this example, non-tough continuous fibers are used as the object, and continuous carbon fibers are used, which are soft and cannot be extruded progressively by wire feeding devices. Surface coating treatment is required to make them have a certain toughness, and then proceed in the way of tough continuous fibers. Print, the specific steps are:

[0063] (1) Put the continuous carbon fiber into the photosensitive resin of the same material as the printing for soaking to ensure full contact between the carbon fiber and the photosensitive resin;

[0064] (2) After the soaking is completed, straighten the carbon fiber and place it on the table, and use a light source to illuminate it, so that the photosensitive resin on the surface is cured to complete the toughness treatment;

[0065] (3) Finally, the process of printing and forming the tough continuous fiber is carried out, and...

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Abstract

The invention discloses a 3D printing forming method of a continuous fiber reinforced member, and belongs to the technical field of 3D printing. The 3D printing forming method comprises the followingsteps that 1) photosensitive resin and continuous fibers make full contact in an extrusion head to form a composite precursor; 2) component forming is synchronously performed by using a 3D printing platform; and 3) under the illumination condition, the photosensitive resin is subjected to cross-linking curing in the printing process, composite reinforcement of the continuous fibers and the photosensitive resin is completed, and a continuous fiber reinforced component is obtained. According to the 3D printing forming method, the composite material of the continuous fibers and the photosensitiveresin is used as a raw material, component forming and accurate shearing operation are completed by means of the 3D printing platform, resin and fiber composite strengthening and the forming processare completed synchronously and coordinately, and therefore the component forming efficiency is improved while the overall performance of the component is improved; and wider applicability and associativity in the selection of photosensitive resin and continuous fibers are achieved, and components made of different materials can be selectively printed and formed.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a 3D printing forming method of a continuous fiber reinforced component. Background technique [0002] Photosensitive resin refers to the material used for photocuring rapid prototyping is a liquid photocurable resin, mainly composed of oligomers, photoinitiators, and diluents. It itself is a colloidal substance with a certain viscosity composed of macromolecules, and these macromolecules are like scattered chain-linked fence-like fragments. The photosensitive resin will change its chemical structure when exposed to light, and these molecules will combine to form longer cross-linked polymer macromolecules, and the polymer will change from a colloidal resin to a hard substance. Photosensitive resin has the characteristics of fast curing speed, high production and energy utilization rate, and is an environmentally friendly material. The cured photosensitive resin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/118B29C64/135B29C64/321B29C64/30B33Y10/00B33Y30/00B33Y40/00
CPCB29C64/118B29C64/135B29C64/30B29C64/321B33Y10/00B33Y30/00B33Y40/00
Inventor 刘军赵风君王臻谭米雪肖新宇
Owner CENT SOUTH UNIV
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