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A kind of semi-closed structure inner core material bonding method

A semi-closed, inner core material technology, applied in the field of composite material manufacturing, can solve the problems of the internal adhesive or film being unable to be vented or discharged, difficult to pressurize, etc., to improve the bonding strength and reliability, easy to implement, The effect of simple process method

Active Publication Date: 2021-02-09
THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
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AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems that the internal core material and the external composite material of the semi-enclosed structure are not easily pressurized, and the internal adhesive or film cannot be exhausted or deglued, and proposes a simple and easy-to-operate method with higher bonding reliability. bonding method

Method used

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Embodiment Construction

[0023] A method for gluing the inner core material of a semi-closed structure, comprising the following steps:

[0024] Step 1: Surface preparation of materials to be bonded

[0025] Grind and roughen the surface to be glued inside the semi-closed composite material, and then wipe it clean;

[0026] Groove on the surface of the core material to be glued, the width and depth of the groove are designed according to the structure of the core material, and the surface of the core material is cleaned after the groove is completed.

[0027] Step 2: Apply Adhesive and Styrofoam

[0028] Lay styrofoam in the groove of the core material. The filling amount of the styrofoam is designed according to the volume of the groove and the foaming rate of the styrofoam. When the foaming rate of the styrofoam is a and the groove volume is v , fill according to the volume of v / a. When filling with styrofoam, it should be filled to the root of the groove. After filling, apply a room temperature a...

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Abstract

The invention belongs to the field of composite material manufacturing and relates to a method suitable for bonding core materials inside a semi-closed structure. The method for gluing the internal core material of the semi-closed structure proposed by the present invention is to manufacture a groove for adhesive exhaust or deglue on the surface of the internal core material to be glued, and then fill the groove with 1 / 2 volume of styrofoam, Apply a layer of room temperature curing adhesive evenly on the surface of the core material to be bonded and the surface to be bonded inside the composite material, then install the core material inside the composite material, pressurize the external composite material after installation, and perform room temperature curing at room temperature For the curing of the adhesive, the curing of the styrofoam is performed after the room temperature curing adhesive is cured. The process method is simple, easy to implement, and can improve the bonding strength and reliability of the core material and the composite material. The core material bonding method of the semi-closed structure has great application value in the manufacturing process of the electromagnetic function structure.

Description

technical field [0001] The invention belongs to the field of composite material manufacturing and relates to a method suitable for bonding core materials inside a semi-closed structure. [0002] technical background [0003] With the development of modern high-tech military weapons, various electromagnetic functional structures with both stealth and wave-transmitting properties emerge in an endless stream. One of the structures requires bonding of core materials inside a closed or semi-closed structure, but this type of bonding is generally Two methods are used, one is to use the internal core material as the molding tool of the external composite material, but there are problems that the core material is not temperature-resistant and pressure-resistant enough to meet the molding temperature and pressure of the composite material; the other is to form the external composite material first , and then apply an adhesive or lay an adhesive film between the bonding surface of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C65/52
CPCB29C65/52B29C66/02241
Inventor 田俊霞杨茂伟刘建
Owner THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
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