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Z-pin ultralow temperature freezing implantation head and method for preparing foam sandwich structure K-cor of Z-pin ultralow temperature freezing implantation head

A technology of ultra-low temperature freezing and z-pin, which is applied in the new technology field of Z-pin reinforcement of fiber composite materials

Active Publication Date: 2012-05-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a Z-pin ultra-low temperature frozen implant head and its K-cor foam sandwich structure preparation method, aiming at In order to solve the problem of insufficient stiffness of the Z-pin of cross-linked or incompletely cured fiber composite materials, the ultra-low temperature freezing technology of Z-pin of uncross-linked or incompletely cured fiber composite materials was adopted to ensure the smooth implantation of Z-pin of fiber composite materials. It solves the contradiction between the implantation stiffness of the Z-pin and the subsequent bending stiffness during the implantation process, thereby improving the bonding strength of the fiber composite Z-pin with the panel or matrix material, and exerting the reinforcement effect of the fiber composite Z-pin

Method used

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  • Z-pin ultralow temperature freezing implantation head and method for preparing foam sandwich structure K-cor of Z-pin ultralow temperature freezing implantation head
  • Z-pin ultralow temperature freezing implantation head and method for preparing foam sandwich structure K-cor of Z-pin ultralow temperature freezing implantation head
  • Z-pin ultralow temperature freezing implantation head and method for preparing foam sandwich structure K-cor of Z-pin ultralow temperature freezing implantation head

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specific Embodiment approach 1

[0016] Specific implementation mode one: combine figure 1 , 2 This embodiment will be described. Place the carbon fiber T300 on the yarn laying device 1, put the prepared Shuangma resin into the dipping tank 3, set the temperature of the glue tank 3, the mold 4 and the post-curing device 5, and set the pultrusion speed of the traction device 6. The carbon fiber passes through the guiding device 2, the dipping tank 3, the mold 4, the post-curing device 5, the traction device 6, and the winding device 7, and is pultruded to obtain a double-horse Z-pin. The obtained Shuangma Z-pin has low curing degree, strength and stiffness, which cannot meet the requirements of implantation. The prepared double-horse Z-pin enters the ultra-low temperature cooling chamber of the implant head through the guide device of the implanter to freeze, and then implants the frozen fiber composite Z-pin into the foam 11 through the implanter. The Z-pin stiffness of the fiber composite material return...

specific Embodiment approach 2

[0017] Specific Embodiment 2: In combination with Specific Embodiment 1, this embodiment will be described. The method in Embodiment 1 is also applicable to Z-pin fiber composite materials suitable for pultrusion resin systems such as epoxy, benzoxazine, phenolic, cyanate and the like.

specific Embodiment approach 3

[0018] Specific Embodiment 3: 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 and other fibers such as Kevlar, glass fibers and boron fibers.

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Abstract

The invention relates to a Z-pin ultralow temperature freezing implantation head and a method for preparing a foam sandwich structure K-cor of the Z-pin ultralow temperature freezing implantation head, which relates to a new technology of enhancing a fiber composite material Z-pin and belongs to the technical field of enhancement of fiber composite materials. The method is characterized by comprising the following steps of: freezing the fiber composite material Z-pin which is not crosslinked or not completely solidified at an ultralow temperature; and implanting the frozen fiber composite material Z-pin into foams. By the method, the problem of insufficient rigidity of the fiber composite material Z-pin which is not crosslinked or not completely solidified in the implantation process is solved, the successful implantation of the fiber composite material Z-pin is ensured, the contradiction between implantation rigidity and subsequent bending rigidity in the process of implanting the Z-pin is eliminated, and a technical support is provided for the application of a novel high-performance sandwich structure K-cor in aerospace.

Description

[0001] technical field [0002] The invention relates to a Z-pin ultra-low temperature freezing implant head and a method for preparing the K-cor foam interlayer structure thereof, relates to a new technology for Z-pin reinforcement of fiber composite materials, and belongs to the technical field of fiber composite material reinforcement. Background technique [0003] The K-Cor sandwich structure is a new type of high-performance sandwich structure reinforced by fiber composite Z-Pin technology. The incompletely cured fiber composite pultrusion rod (ie Z-pin) is implanted into the foam at a certain angle to form a three-dimensional truss The core structure, the part of the fiber composite Z-pin beyond the foam surface is incompletely cured, and the two ends of the uncrosslinked or incompletely cured fiber composite Z-Pin are bent to the foam surface under the combined action of heat and pressure , relying on the bonding force generated by the reaction between the uncrosslin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/28B29C70/54
Inventor 还大军胡晶晶文立伟王显峰齐俊伟李勇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS