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Method for manufacturing Z-pin reinforced carbon/carbon composite prefabricated part and Z-pin freezing pultrusion and implantation integrated machine

A carbon composite material and a manufacturing method technology, applied in the field of carbon/carbon composite material reinforcement

Active Publication Date: 2012-06-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a Z-pin reinforced carbon / carbon composite material preform manufacturing process, which solves the problem of three-dimensional reinforced carbon fiber in the process of implanting carbon fiber woven cloth The problem of easy damage in the middle ensures the smooth implantation of the pure carbon fiber Z-pin, and improves the anti-delamination and impact resistance of fiber three-dimensional reinforced hollow composite materials

Method used

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  • Method for manufacturing Z-pin reinforced carbon/carbon composite prefabricated part and Z-pin freezing pultrusion and implantation integrated machine
  • Method for manufacturing Z-pin reinforced carbon/carbon composite prefabricated part and Z-pin freezing pultrusion and implantation integrated machine

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specific Embodiment approach 1

[0015] Specific implementation mode one: combine figure 1 This embodiment will be described. Put the infiltration medium whose boiling point is lower than the minimum curing temperature of the prepreg and does not react with the carbon fiber, such as water, alcohol, acetone and other easily removable media, into the immersion tank 3, and place the carbon fiber T300 in the yarn unwinding device 1. The fiber guiding device 2 guides into the immersion tank 3, and the carbon fiber soaked in the medium is formed into a cylindrical frozen Z-pin through the pultrusion die 5 of the ultra-low temperature cooling chamber, and the frozen Z-pin is implanted with the implant head 7 of the ultra-low temperature cooling chamber. Into the carbon fiber woven cloth 9, according to the physical properties of the infiltration medium, the Z-pin reinforced carbon fiber woven cloth is raised to room temperature or slightly increased temperature under reduced pressure, so that the infiltration mediu...

specific Embodiment approach 2

[0016] Specific Embodiment 2: In combination with Specific Embodiment 1, this embodiment will be described. The method in the first embodiment is also applicable to other types of carbon fibers.

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Abstract

The invention relates to a method for manufacturing a Z-pin reinforced carbon / carbon composite prefabricated part and a Z-pin freezing pultrusion and implantation integrated machine and belongs to the technical field of carbon / carbon composite reinforcement. The method comprises the following steps of: infiltrating carbon fibers with a medium which has the boiling temperature lower than the lowest carbonization temperature of the carbon fibers and cannot react with the carbon fibers; then freezing the fibers infiltrated with the medium under the condition of ultralow temperature to prepare a Z-pin; implanting the frozen Z-pin into carbon fiber woven cloth; and finally, according to the physical properties of the infiltrating medium, ensuring the medium in the Z-pin in the Z-pin reinforcedcarbon fiber woven cloth to be completely volatilized under the decompression condition or also by an auxiliary heating mode. Due to the adoption of the method, the problem that the carbon fibers in the three-dimensional reinforcement are easy to damage in the process of being implanted into the carbon fiber woven cloth is solved, the pure fiber Z-pin is ensured to be successfully implanted, the defects of easiness for layering, poor impact resistance and the like of a fiber three-dimensional reinforced hollow composite are also overcome, and the technical support is provided for application of the composite to the aeronautics and astronautics.

Description

[0001] technical field [0002] The invention relates to a method for manufacturing Z-pin reinforced carbon / carbon composite material prefabricated parts and a Z-pin frozen pultrusion implantation integrated machine, belonging to the technical field of carbon / carbon composite material reinforcement. Background technique [0003] Carbon / carbon composite material is a composite material that is based on carbon and reinforced by carbon fiber or its products (carbon felt or carbon cloth). The main steps of its preparation are: preform molding → densification treatment → final high temperature heat treatment. The prefabricated part is made of chopped fiber, continuous fiber or a mixture of the two in a certain proportion to weave or mold carbon / carbon products, as a reinforced skeleton of carbon / carbon composite materials. At present, the commonly used reinforced prefabricated molding methods include three-dimensional weaving molding, acupuncture stitching molding, etc. Althou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83
Inventor 还大军胡晶晶文立伟王显峰齐俊伟李勇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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