Carbon fiber composite material rib with spiral resin ribs at two ends and preparation method thereof

A composite material and carbon fiber technology, applied in other home appliances, bridge parts, bridges, etc., can solve the problems of the decrease of the tensile strength and elastic modulus of the reinforcement, the fluctuation of the orientation in the length direction, and the unevenness of the surface of the reinforcement. The effect of high production process efficiency, small deviation of outer diameter size and easy control of tolerance

Pending Publication Date: 2020-11-03
FASTEN HONGSHENG GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two problems in this method: one is that due to the winding of the F4 tape, the orientation of the internal continuous carbon fiber bundles fluctuates along the length direction of the reinforcement, resulting in a decrease in the tensile strength and elastic modulus of the reinforcement; the other is that after the F4 tape is wound , the surface of the reinforcement is uneven, and the friction force is very large during the process of pulling into the shaping mold and curing, which is prone to the problem of mold blocking
The surface of the reinforcement produced by this process has spiral resin ribs throughout the entire length, and the surface spiral resin ribs are mainly used to improve the anchoring performance at both ends of the reinforcement. function, and in order to manufacture the surface with spiral resin ribs, the multi-channel oven curing process outside the mold is adopted, which has the disadvantages of low heat transfer efficiency and low production efficiency

Method used

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  • Carbon fiber composite material rib with spiral resin ribs at two ends and preparation method thereof
  • Carbon fiber composite material rib with spiral resin ribs at two ends and preparation method thereof
  • Carbon fiber composite material rib with spiral resin ribs at two ends and preparation method thereof

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preparation example Construction

[0037] The preparation process of the above-mentioned carbon fiber composite material is referred to figure 2 , the specific steps are described below.

[0038] Step 1: If image 3 Several bundles of carbon fiber bundles 3 are drawn from the yarn splitting plate 4, the quantity of the carbon fiber bundles is adjusted according to the diameter of the reinforcement material as required, and the volume content of the fiber is controlled by the number of fiber bundles to be adjusted in the range of 65%-78%, and the traction speed is Adjust the range of 300mm / min-600mm / min, use the tension controller to control the tension of the thread, in order to ensure that the orientation of the carbon fiber bundle remains straight during impregnation, the tension is adjusted in the range of 20N-60N;

[0039] Step 2: If image 3 The carbon fiber bundle 3 is restrained and immersed in the epoxy resin mixture 5 through the wire arrangement pressure rod 6 and the immersion depth pressure rod 7...

Embodiment 1

[0046] A carbon fiber composite reinforcement material with resin ribs on both ends and a smooth circle in the middle, including carbon fiber and epoxy resin matrix. The diameter of the reinforcement is 7mm. Light round carbon fiber composite ribs. Both ends of the ribbed carbon fiber composite reinforcement are 2000mm in length, the thickness of the resin rib is 0.25mm, the pitch of the resin rib is 2.4mm, and the length of the smooth round carbon fiber composite reinforcement is 20000mm.

[0047] A method for preparing a carbon fiber composite reinforcement with resin ribs on both ends and a smooth circle in the middle includes the following steps:

[0048] Step 1: Draw out 62 carbon fiber bundles 3 from the splitter plate 4, the fiber volume content is 72%, the pulling speed is 300mm / min, and the tension controller is used to control the tension of the wire, in order to ensure that the orientation of the carbon fiber bundles is maintained during impregnation Straight, the ...

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Abstract

The invention relates to a carbon fiber composite material rib with spiral resin ribs at two ends and a preparation method thereof; wherein a core part is a unidirectional carbon fiber reinforced epoxy resin matrix composite material, the end part of the rib material is used as an anchoring section, the outer surface of the anchoring section is provided with a continuous spiral rib structure, andthe middle section of the rib material is the outer surface of a plain circle. The volume content of the carbon fiber bundles in the rib material is 65%-78%. The cured resin on the surface of the ribmaterial can form a spiral rib or keep a smooth round state according to the purposes of different areas and requirements. With a bridge inhaul cable as an example, the two ends of a rib material aremachined into spiral rib structures to serve as anchoring sections, anchoring reliability can be improved, resin spiral ribs are formed on the anchoring sections, the middle section between the two anchoring sections is kept smooth and round, and uniform distribution of tensile stress is facilitated.

Description

technical field [0001] The invention belongs to the technical field of building materials, and mainly relates to a carbon fiber composite material bar with spiral resin ribs at both ends and a preparation method thereof. Background technique [0002] Carbon fiber composite reinforcement has the characteristics of light weight, high strength, corrosion resistance, fatigue resistance, and good shock absorption performance. Using it as a cable component in bridge cables has become a development direction for improving bridge span and durability. However, it is difficult to anchor carbon fiber composite tendons with smooth and round surfaces, which is the key factor restricting its widespread application at present. At present, four kinds of carbon fiber composite bars with concave-convex structure on the surface have been developed at home and abroad, which are used to increase the mechanical bite force between the surface of the bar and the anchoring material, and improve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/16B29C70/52B29C53/60B29L31/10
CPCB29C53/581B29C53/60B29C70/521B29L2031/10E01D19/16
Inventor 刘礼华朱元林朱维军黄盛彬
Owner FASTEN HONGSHENG GRP CO LTD
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