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Fiber reinforced composite material fusing and steeping device capable of achieving tension online adjustment and preparation method

A melt impregnation and composite material technology, which is applied in the field of continuous fiber reinforced composite material processing, can solve the problems of high fracture rate of composite materials, difficult processing and production, fixed fiber bundle impregnation channel form, etc., and achieves simple production operation and excellent impregnation effect , the effect of simple structure

Active Publication Date: 2017-12-01
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing continuous fiber-reinforced thermoplastic resin impregnation device mainly has the following technical problems or defects: 1) The form of the fiber bundle impregnation channel is fixed, and the replacement is cumbersome; 2) The tension and wrapping angle of the fiber bundle during production cannot be adjusted online, resulting in the degree of impregnation. Less than 90%, the fracture rate of the prepared composite material is higher than 5%; 3) The shape of the impregnation device is complicated, and the processing and production are relatively difficult

Method used

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  • Fiber reinforced composite material fusing and steeping device capable of achieving tension online adjustment and preparation method
  • Fiber reinforced composite material fusing and steeping device capable of achieving tension online adjustment and preparation method
  • Fiber reinforced composite material fusing and steeping device capable of achieving tension online adjustment and preparation method

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preparation example Construction

[0048] On the other hand, the present invention also provides a method for preparing a continuous fiber-reinforced thermoplastic resin by melt impregnation, comprising the following steps:

[0049] (1) Carry out detwisting and preheating treatment to the continuous fiber bundle 1;

[0050] (2) Draw the continuous fiber bundle 1 into the melt impregnation mold 3, adjust the wrapping angle and the tension of the continuous fiber bundle 1 through a plurality of rotatable impregnation devices arranged in the melt impregnation mold 3, so that the continuous fiber bundle can be obtained Disperse; at the same time, extrude the plasticized thermoplastic resin melt into the melt impregnation mold 3, so that the continuous fiber bundle 1 is impregnated to form a prepreg composite material;

[0051] (3) Cool and set the prepreg composite material.

[0052] Preferably, the continuous fiber bundle 1 in step (1) includes but not limited to glass fiber, carbon fiber, basalt fiber or aramid fi...

Embodiment 1

[0061] A method for preparing continuous fiber-reinforced thermoplastic resin by melt impregnation. The continuous fiber bundle is selected from carbon fiber, and the thermoplastic resin is selected from nylon 66; the temperature of the melt impregnation mold is set to 280°C, and three rotating impregnation devices are installed and arranged at a distance of 80mm; the diameter of the impregnation roller The diameter of the rotating disk is 60mm; the temperature of the feeding section, compression section and metering section of the extruder is 260°C, 275°C, and 285°C respectively.

[0062] This embodiment selects a group of comparative experiments, scheme 1 is that all three rotating dipping devices are rotated 90°, scheme 2 is that all three rotating dipping devices are turning 120°, scheme 3 is that all three rotating dipping devices are turning 150°, the test results See Table 1.

Embodiment 2

[0064] A method for preparing continuous fiber-reinforced thermoplastic resin by melt impregnation. The continuous fiber bundle 1 is selected from glass fiber, and the thermoplastic resin is selected from polypropylene; the temperature of the melt impregnation mold is set at 230°C, and 4 rotating impregnation devices are installed and arranged at a distance of 50 mm; impregnation rollers The diameter of the rotary disc is 10mm, and the diameter of the rotating disc is 40mm; the temperatures of the feeding section, compression section, and metering section of the extruder are 150°C, 220°C, and 230°C, respectively.

[0065] This embodiment selects a group of comparative experiments. In scheme 1, all 4 rotating impregnating devices rotate 135°, and in scheme 2, the angles of rotation of 4 rotating impregnating apparatuses are 180°, 150°, 120° and 90° respectively. For the test results, see Table 2.

[0066] It can be seen from Table 1 that through comparative experiments on diffe...

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Abstract

The invention discloses a fiber reinforced composite material fusing and steeping device capable of achieving tension online adjustment and a preparation method. The fiber reinforced composite material fusing and steeping device comprises a wire-separating preheating device body, a fusing and steeping mold, a plurality of rotatable steeping adjusting device bodies, an extruder, a cooling device body and a traction device body. The wire-separating preheating device body is used for conducting wire-separating untwisting and preheating on continuous fiber bundles. The extruder is used for extruding a plasticized resin melt into the fusing and steeping mold. All the rotatable steeping adjusting device bodies are mounted in the fusing and steeping mold at equal intervals. The fiber bundles penetrate through the steeping adjusting device bodies. In the steeping process, the wrapping angles of the fiber bundles on the surfaces of steeping rollers and the tension borne by the fiber bundles are adjusted on line by all the rotatable steeping adjusting device bodies. The cooling device body is used for conducting cooling shaping on pre-steeped composite materials. The traction device body is mounted at an outlet of the cooling device body and used for traction of the continuous fiber bundles. Through the fiber reinforced composite material fusing and steeping device, the wrapping angles and tension of the fiber bundles can be adjusted on line to enable the fiber bundles to be sufficiently dispersed, the fiber bundles are sufficiently steeped by resin, and thus the mechanical performance of the composite materials is improved.

Description

technical field [0001] The invention relates to the field of continuous fiber-reinforced composite material processing, in particular to a fiber-reinforced composite material melting impregnation device and a preparation method capable of adjusting tension online. Background technique [0002] Continuous fiber reinforced composites have strong chemical and environmental corrosion resistance, no chemical reaction occurs during curing, can be reused without performance degradation, short production cycle, high efficiency, wide molding adaptability, mechanical properties and thermal stability It has excellent performance, can give full play to the role of reinforcing fibers, and has a broader development prospect. It is mainly used in automobile industry, chemical environmental protection, aerospace communication and other departments and industries. [0003] The difficulty in preparing continuous fiber-reinforced composites mainly lies in the high viscosity of thermoplastic re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/52B29C70/54
Inventor 信春玲曹敏华李东生何亚东沈国忠刘丹任峰
Owner BEIJING UNIV OF CHEM TECH
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