Lapping and tape continuing method for resin-based composite material pre-impregnation adhesive tape

A composite material and resin-based technology, which is applied in the field of lay-up molding and composite material winding, can solve the problems of complex process, low efficiency of prepreg tape, and doping materials, so as to improve the quality of winding products and avoid impurities and stress concentration point effect

Inactive Publication Date: 2012-06-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of low efficiency, complex process, and the appearance of doped materials in the existing hand-stitched composite material prepreg tape, the present invention proposes a method for lapping and continuing the resin-based composite material prepreg tape. A rapid, doping-free and lossless tape-repeating process for composite prepreg tapes

Method used

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  • Lapping and tape continuing method for resin-based composite material pre-impregnation adhesive tape
  • Lapping and tape continuing method for resin-based composite material pre-impregnation adhesive tape
  • Lapping and tape continuing method for resin-based composite material pre-impregnation adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this example, two sections of composite material prepreg tapes are lapped together by means of heating and pressure to form a continuous prepreg tape.

[0025] Step 1: Horizontally overlap the joint part of the resin-based composite material prepreg tape 1 with the joint part of the resin-based composite material prepreg tape 2 by 100 mm, and align the sides of the two prepreg tapes. figure 2 shown.

[0026] Step 2: Heat the overlapping part of the two prepreg tapes to 40°C, so that the resin matrix 3 on the surface of the overlapping part melts into a viscous fluid with a certain viscosity. Since the resin matrix materials of the two prepreg tapes to be overlapped are the same , so the resin matrix on the surface of the two prepreg tapes is integrated, such as image 3 shown.

[0027] Step 3: Apply 10Kg / cm to the overlapping part of the two prepreg tapes in the direction perpendicular to the overlapping surface 2 pressure, and keep it for 8 seconds, so that the ...

Embodiment 2

[0030] In this example, two sections of composite material prepreg tapes are lapped together by means of heating and pressure to form a continuous prepreg tape.

[0031] Step 1: Horizontally overlap the joint part of the resin-based composite material prepreg tape 1 with the joint part of the resin-based composite material prepreg tape 2 by 200mm, and align the sides of the two prepreg tapes.

[0032] Step 2: Heat the overlapping part of the two prepreg tapes to 60°C, so that the resin matrix 3 on the surface of the overlapping part melts into a viscous fluid with a certain viscosity, because the resin matrix materials of the two prepreg tapes to be overlapped are the same , so the resin matrix on the surface of the two prepreg tapes is integrated.

[0033] Step 3: Apply 5Kg / cm to the overlapping part of the two prepreg tapes in the direction perpendicular to the overlapping surface 2 pressure, and keep it for 10 seconds, so that the fiber reinforcements 4 inside the two sect...

Embodiment 3

[0036] In this example, two sections of composite material prepreg tapes are lapped together by means of heating and pressure to form a continuous prepreg tape.

[0037] Step 1: Horizontally overlap the joint part of the resin-based composite material prepreg tape 1 with the joint part of the resin-based composite material prepreg tape 2 by 150mm, and align the sides of the two prepreg tapes.

[0038] Step 2: Heat the overlapping part of the two prepreg tapes to 50°C, so that the resin matrix 3 on the surface of the overlapping part melts into a viscous fluid with a certain viscosity. Since the resin matrix materials of the two prepreg tapes to be overlapped are the same , so the resin matrix on the surface of the two prepreg tapes is integrated.

[0039] Step 3: Apply 7Kg / cm to the overlapping part of the two prepreg tapes in the direction perpendicular to the overlapping surface 2 pressure, and keep it for 10 seconds, so that the fiber reinforcements 4 inside the two sectio...

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Abstract

The present invention provides a lapping and tape continuing method for a resin-based composite material pre-impregnation adhesive tape. According to the method, the resin matrix in the pre-impregnation adhesive tape is heated to melt into a viscous fluid; after pressurizing, the resin matrix flows, such that the fiber reinforcing materials in the two sections of the pre-impregnation adhesive tapes are tightly attached; after cooling, the resin matrix is solidified, such that the tight attaching state between the fiber reinforcing materials is maintained; finally the static friction force between the fiber reinforcing materials bears the tensile force to obtain the continuous adhesive tape with the tensile strength so as to achieve the tape continuing of the pre-impregnation adhesive tape during winding. According to the present invention, when the method of the present invention is used, other materials are not required to carry out continuing, and the structure of the pre-impregnation adhesive tape is not damaged, such that the impurities and the stress concentration points are avoided, the composite material pre-impregnation adhesive tape continuing with the characteristics of no impurity and no damage is achieved, and the quality of the winding product is improved, wherein the impurities and the stress concentration points are generated by sewing threads and the pinholes during the manual sewing continuing process.

Description

technical field [0001] The invention relates to the technical field of winding and laying molding of composite materials, in particular to a method for splicing and splicing prepreg tapes of resin-based composite materials. Background technique [0002] Resin-based composite materials have the characteristics of high specific strength, high specific stiffness, unique designability and good processability, and are widely used in many fields such as aerospace, national defense and civil, among which resin-based composite prepreg tapes are widely used In the winding and laying molding process of composite materials, the reinforcing fibers are woven according to the rules to form a cloth-like fiber reinforcement and immersed in the resin matrix solvent. The content of the resin matrix in the reinforcing fibers is controlled through several processes, and finally obtained through drying, cutting and other processes. Resin-based composite material pre-impregnated tape. During the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/42
Inventor 何晓东史耀耀俞涛岳洋左安邦彭家浩
Owner NORTHWESTERN POLYTECHNICAL UNIV
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