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Internal pressurizing airbag for aircraft wall plate stringer

A technology of aircraft siding and internal pressurization, which is applied in the field of composite material molding, can solve the problems of difficult removal, low manufacturing efficiency, difficult demoulding, etc., and achieve the effect of convenient removal and good mold release

Inactive Publication Date: 2019-06-21
SHANGHAI AIRCRAFT MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Aircraft siding stringers in the prior art are made of rubber, and laminated after the air bag is placed on the outer mandrel, but the thickness of such an inner mold is different after molding, and it is difficult to take out and demould, resulting in material Cost waste and low manufacturing efficiency

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0014] A kind of pressurized air bag used in the long truss of the aircraft wallboard of the present invention uses nylon air bag film to wrap the inner mandrel structure, the nylon air bag film is heat-sealed and cut in the mold cavity of the mould, and the inner mandrel is made of foam Material foam molding. Nylon air bag film adopts two-layer structure, the outer layer is modified PMP material, the inner layer is made of PA66 and PA6 copolymer material, and the two-layer structure is bonded by adhesive resin to form a composite structural film. Nylon air bag film has high strength, high temperature resistance and high release performance, and has good mold release properties.

[0015] A kind of pressurized air bag technology used in the long truss of aircraft panel of the present invention is as follows:

[0016] (1) Lay the nylon airbag film on the upper and lower molds, that is, lay the nylon airbag film in the cavity of the mold, and then put the upper and lower molds t...

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PUM

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Abstract

The invention relates to the technical field of composite material forming, in particular to an internal pressurizing airbag for an aircraft wall plate stringer. Compared with the prior art, the internal pressurizing airbag for the aircraft wall plate stringer adopts a nylon airbag film to wrap an inner core mold structure, the nylon airbag film is formed by heat sealing and cutting in a mold cavity of a mold, and the inner core mold is formed by foaming of a foaming material. The nylon airbag film adopts a two-layer structure, the outer layer of the nylon airbag film is made of a modified PMPmaterial, the inner layer of the nylon airbag film is made of PA66 and PA6 copolymerization materials, and the two layers are bonded by binder resin to form a composite structural film. The materialis used, so that the nylon airbag film have high strength, high temperature resistance and the high-efficiency release property, the good mold release property is achieved, the overall airbag has a certain hardness, paving of prepreg can be directly carried out on the overall airbag conveniently, the airbag film can withstand the corresponding high temperature and high pressure environment after mold entering, and the formed foaming material shrinks, and whole taking out from the mold is very convenient.

Description

technical field [0001] The invention relates to the technical field of composite material forming, in particular to a pressurized airbag used in the long truss of the aircraft wall plate. Background technique [0002] Aircraft siding stringers in the prior art are made of rubber, and laminated after the air bag is placed on the outer mandrel, but the thickness of such an inner mold is different after molding, and it is difficult to take out and demould, resulting in material Cost waste and low manufacturing efficiency. Contents of the invention [0003] In order to solve the defects and problems existing in the forming process of carbon fiber special-shaped parts in the prior art, a pressurized air bag used in the long truss of the aircraft wall plate is provided. [0004] The technical solution adopted by the present invention for solving the technical problem is: a kind of pressurized air bag used in the long truss of the aircraft wall plate of the present invention use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/38B29C33/40B29C70/34B29C70/54B29L31/30
Inventor 冯小璐陈天河
Owner SHANGHAI AIRCRAFT MFG