CN104589670B - A kind of gas path design method of composite cavity structure air bag shaping - Google Patents

A kind of gas path design method of composite cavity structure air bag shaping Download PDF

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Publication number
CN104589670B
CN104589670B CN201410714897.4A CN201410714897A CN104589670B CN 104589670 B CN104589670 B CN 104589670B CN 201410714897 A CN201410714897 A CN 201410714897A CN 104589670 B CN104589670 B CN 104589670B
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China
Prior art keywords
air bag
frock
mould
cavity
vacuum
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CN201410714897.4A
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CN104589670A (en
Inventor
黎玉钦
贾傲
王国平
马秀菊
刘备备
谢海洋
黄毅
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AEROSPACE HAIYING (ZHENJIANG) SPECIAL MATERIAL Co Ltd
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AEROSPACE HAIYING (ZHENJIANG) SPECIAL MATERIAL Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/40Shaping or impregnating by compression not applied
    • B29C70/42Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/446Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/54Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing

Abstract

The invention discloses a kind of gas path design method of composite cavity structure air bag shaping, the air bag mould that a set of cavity inside matching size with cavity structure part of processing is closed, in air bag mould inner surface paving air bag frock, and it is hot-forming, by the paving on cavity pre-compacting mould of member cavity partial prepreg, outer layer vacuum bag vacuum sealing, and precompressed completion;Remove chamber portion prepreg and be placed on the corresponding empty cavity position of forming parts mould, and it is put into the air bag frock of solidification, the web part prepreg that last covered precompressed is completed, in web outer surface vacuum bag vacuum sealing, enters autoclave molding composite product.The present invention can evenly, accurately transmit the pressure of autoclave applying, composite product is avoided the overproof phenomenon of thickness occur, metal valve is abandoned, using termination openings mode, eliminate metal valve and the possibility of damaged and gas leakage occurs with air bag junction, the service life of air bag is substantially prolongs, 2 points of the above can be effectively ensured the Forming Quality of product, improve the qualification rate and efficiency of production.

Description

A kind of gas path design method of composite cavity structure air bag shaping
Technical field
The present invention relates to advanced composite material manufacturing technology field, more particularly to a kind of composite cavity structure air bag into The gas path design method of type.
Background technology
Resin-based carbon fiber composite has specific strength, specific stiffness high, and designability is strong, and fatigue crack-resistant performance is good, Corrosion-resistant, the superior performance such as good stability of the dimension is using quite varied height in the fields such as current Aeronautics and Astronautics, traffic Performance structure material.In various carbon fibre composite moulding process, autoclave technique has forming temperature and pressure uniform, There is good adaptability for the part of different materials, profile, size and structure, thus become research and manufacture aviation boat One of major processes of its high-quality composite element.
With the increasingly raising to composite material parts intensity, rigidity requirement, the structure of part also becomes increasingly complex, wherein Wallboard with cavity structure is one of typical structure part.Part shape for hat Material Stiffened Panel structure is relative complex, not only with shape for hat Rib, while wallboard Curvature varying in itself is larger, when this kind of part is manufactured, the spacing between shape for hat rib, shape for hat rib Interior surface and shape for hat rib generally compare strict with the relative position degree requirement of wallboard.
Core is used mostly in current technique or air bag method is molded this kind of part, the wherein air bag method of forming had been molded Journey and product quality aspect all occupy certain advantage, but traditional air bag is communicated with the external world by metal valve.With As a example by simple cavity structure composite material element, its forming method uses air bag method, and the effect of air bag is by the pressure of autoclave Composite material component port surface is uniformly transferred to temperature, part is molded at high temperature under high pressure, while the flexibility of air bag It is easy to the demoulding without injuring part, design requirement can be met.Mainly have following using the shortcoming with metal air-tap air-bag Three aspects:(1)Because air bag itself has certain flexibility, in shaping, metal valve coordinates tired with Silicon rubber inflatable bag Difficulty, be easily pressurized in solidification process it is uneven cause metal valve position change, influence air bag arrange quality, so as to cause part It is pressurized uneven;(2)Metal valve is easiest to the place of damaged and gas leakage with the position exactly air bag of airbags.Such air bag Gas leakage probability it is higher, so as to influence the internal soundness of part;(3)Because valve is metal material, week is reprocessed or re-worked Phase is more long, and the manufacturing cost of air bag is higher, and operation inconvenience.
The content of the invention
The purpose of the present invention is directed to the deficiency of prior art presence, there is provided a kind of composite cavity structure air bag shaping Gas path design method.
To achieve these goals, the present invention uses following technical scheme:A kind of composite cavity structure air bag shaping Gas path design method, comprise the following steps:
(1)The air bag mould that a set of cavity inside matching size with cavity structure part of processing is closed, air bag shaping mould Tool is divided into upper and lower two parts, there is matching relationship therebetween;
(2)In air bag mould inner surface paving air bag frock, and air bag frock outer layer paving tubular vacuum bag, The outer layer of air bag mould vacuum bag vacuum sealing, into autoclave molding air bag frock, solidifying pressure is 600 ~ 650kPa, 180 DEG C ± 6 DEG C of solidification temperature, hardening time 120min after the shaping of air bag frock, removes vacuum bag, takes out solidification Air bag frock;
(3)By the paving on cavity pre-compacting mould of member cavity partial prepreg, outer layer vacuum bag vacuum sealing, and Precompressed is completed;Remove chamber portion prepreg and be placed on the corresponding empty cavity position of forming parts mould, and be put into the air bag of solidification Frock, the web part prepreg that last covered precompressed is completed, in web outer surface vacuum bag vacuum sealing, enters autoclave Forming composite product;
(4)After product shaping, vacuum bag material is removed, it is de- that air bag frock is separated into i.e. completion with composite product Mould, obtains the composite with cavity structure.
The air bag frock includes two-layer rubber layer and the carbon fiber prepreg enhancement layer being coated in rubber layer.
The number of plies of the carbon fiber prepreg enhancement layer being coated in rubber layer is 1~5 layer.
The air bag frock is entering autoclave, when pressure reaches 140kPa, by vacuum bag and atmosphere, and keeps Connected state is until solidification is completed.
The present invention compared with prior art, with following advantage:
1st, with traditional metal valve compared with the method that the external world communicates, autoclave applying more can uniformly, be accurately transmitted Pressure, it is to avoid there is the overproof phenomenon of thickness in composite product;
2nd, metal valve has been abandoned, using termination openings mode, metal valve has been eliminated and breakage is occurred with air bag junction With the possibility of gas leakage, the service life of air bag is substantially prolongs, 2 points of the above can be effectively ensured the Forming Quality of product, carry The qualification rate and efficiency of height production;
3rd, in traditional air bag forming process, how air bag is connected with metal valve and orientated as the work of most critical Step, and should be noted to avoid the folding or compression of valve junction as far as possible during use, opened type air bag does not exist similar Difficult point, reduces air bag shaping difficulty and risk, has saved manufacturing cost.
Brief description of the drawings
Fig. 1 is the structural representation of air bag mould of the present invention.
Fig. 2 is the structural representation after air bag mould paving air bag frock.
Fig. 3 is the schematic diagram of paving chamber portion prepreg on cavity pre-compacting mould.
Fig. 4 is the shaping manufacture process schematic diagram of cavity composite product.
Specific embodiment
The present invention is further illustrated with specific embodiment below in conjunction with the accompanying drawings.
The present invention abandons metal valve, and the method opened wide using termination is molded air bag, after air bag shaping, then coordinates phase The mold design and the scheme of vacuum bag processed answered, can not only better ensure that air bag external and internal pressure is consistent, and greatly prolong The service life of air bag.Detailed process is as follows:
(1)The air bag mould that a set of cavity inside matching size with cavity structure part of processing is closed, air bag shaping mould Tool is divided into upper and lower two parts, there is matching relationship, such as Fig. 1 therebetween;
(2)It is utilized respectively two pieces of air bag moulds, paving air bag frock.Air bag frock, will with rubber as main material Rubber successively paving is in air bag mould inner surface;Paving carbon fiber prepreg can be wanted in the middle of rubber layer if necessary to be strengthened Used as enhancement layer, to improve the integral rigidity of soft frock, the number of plies of paving rubber and prepreg depends primarily on composite wood to layer Expect the size and complex degree of structure of product, the carbon fiber being coated in rubber layer expects that the number of plies of enhancement layer is 1 ~ 5 layer.
The last external and internal pressure in air bag frock outer layer paving tubular vacuum bag causes air bag forming process is consistent, The outer layer of air bag mould vacuum bag vacuum sealing, and according to the curing process of rubber, be molded under high-temperature and high-pressure conditions Termination openings formula air bag, the solidifying pressure of autoclave is 600 ~ 650kPa, 180 DEG C ± 6 DEG C of solidification temperature, hardening time 120min.And after air bag frock enters autoclave, when pressure reaches 140kPa, by vacuum bag and atmosphere, and protect Connected state is held until solidification completion, such as Fig. 2.
(3)After the shaping of termination opened type air bag frock, using as the weight of the shaping manufacture process of cavity composite product Want part.Air bag Fixture Design is coordinated to go out cavity pre-compacting mould and forming parts mould first, by the preimpregnation of member cavity part Material paving on cavity pre-compacting mould, outer layer vacuum bag vacuum sealing, and precompressed are completed, such as Fig. 3;And web part presoaks Material, first paving simultaneously carries out precompressed on die bottom plate, and removing chamber portion prepreg, to be placed on forming parts mould empty accordingly Chamber position, and the air bag frock of solidification is put into, the web part prepreg that last covered precompressed is completed is used in web outer surface Vacuum bag vacuum sealing, enters autoclave molding composite product;Because air bag frock also possesses certain rigidity, Ke Yibao in itself Appearance and size after card product shaping meets the requirements, such as Fig. 4.
(4)After product shaping, vacuum bag material is removed, then air bag frock is separated with composite product and is completed The demoulding, air bag frock flexible nature in itself is also beneficial to the demoulding.According to the difference using material and technique, air bag frock can be with Reuse for several times to tens of times, if air bag frock is damaged or deformed, can be used air bag mould to manufacture again.
The above, is only presently preferred embodiments of the present invention, and any type of limitation is not done to the present invention.It is every According to any simple modification, equivalent variations and modification that technology of the invention and method are substantially made to above example, still Belong in the range of technology of the invention and method scheme.

Claims (1)

1. a kind of gas path design method that composite cavity structure air bag is molded, it is characterised in that comprise the following steps:
(1)The air bag mould that a set of cavity inside matching size with cavity structure part of processing is closed, air bag mould point It is upper and lower two parts, there is matching relationship therebetween;
(2)In air bag mould inner surface paving air bag frock, and in air bag frock outer layer paving tubular vacuum bag, in air bag The outer layer of mould vacuum bag vacuum sealing, into autoclave molding air bag frock, solidifying pressure is 600 ~ 650kPa, Gu Change 180 DEG C ± 6 DEG C of temperature, hardening time 120min after the shaping of air bag frock, removes vacuum bag, takes out the air bag frock of solidification;
(3)By the paving on cavity pre-compacting mould of member cavity partial prepreg, outer layer vacuum bag vacuum sealing, and precompressed Complete;Remove chamber portion prepreg and be placed on the corresponding empty cavity position of forming parts mould, and be put into the air bag frock of solidification, The web part prepreg that last covered precompressed is completed, in web outer surface vacuum bag vacuum sealing, enters autoclave molding Composite product;
(4)After product shaping, vacuum bag material is removed, air bag frock is separated with composite product and completes the demoulding, obtain There must be the composite of cavity structure;
The air bag frock includes two-layer rubber layer and the carbon fiber prepreg enhancement layer being coated in rubber layer;
The number of plies of the carbon fiber prepreg enhancement layer being coated in rubber layer is 1 ~ 5 layer;
The air bag frock is entering autoclave, when pressure reaches 140kPa, by vacuum bag and atmosphere, and keeps connection State is until solidification is completed.
CN201410714897.4A 2014-12-02 2014-12-02 A kind of gas path design method of composite cavity structure air bag shaping Active CN104589670B (en)

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CN105599174A (en) * 2016-03-30 2016-05-25 长葛市华晟电气有限公司 Automatic-generation electric protective jacket production die
CN105904742B (en) * 2016-04-25 2018-09-04 大连理工大学 A kind of winding, molding method of full composite material shell
CN105773997B (en) * 2016-04-25 2017-12-05 大连理工大学 A kind of core unit for being used to be molded full composite material housing
CN106863846B (en) * 2016-12-30 2019-04-02 中国科学院长春光学精密机械与物理研究所 A kind of high pressure temperature equalization system being used to prepare carbon fiber part
CN107139514B (en) * 2017-04-27 2019-11-15 沈阳飞机工业(集团)有限公司 A kind of manufacturing method of air bag aided composite Material Stiffened Panel
CN108790210A (en) * 2017-04-28 2018-11-13 深圳光启高等理工研究院 Composite material air intake duct and preparation method thereof and aircraft
CN108790211B (en) * 2017-04-28 2022-07-12 深圳光启高等理工研究院 Preparation method of composite material air inlet and composite material air inlet
CN108407328B (en) * 2018-02-11 2020-04-17 佛山市顺德区迈进机械制造有限公司 Hot press molding method of composite material product
CN109986804A (en) * 2019-03-26 2019-07-09 江苏恒神股份有限公司 A kind of carbon-fiber composite material enhancing block and preparation method
CN110370682B (en) * 2019-08-07 2021-12-03 沈阳飞机工业(集团)有限公司 Forming method of large-curvature C-shaped frame composite material part with angle section

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