CN104401092A - Method for enabling carbon fiber composite thick laminated structure to uniformly absorb resin and laminated structure - Google Patents
Method for enabling carbon fiber composite thick laminated structure to uniformly absorb resin and laminated structure Download PDFInfo
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- CN104401092A CN104401092A CN201410656752.3A CN201410656752A CN104401092A CN 104401092 A CN104401092 A CN 104401092A CN 201410656752 A CN201410656752 A CN 201410656752A CN 104401092 A CN104401092 A CN 104401092A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/02—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
- B32B17/04—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments bonded with or embedded in a plastic substance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/552—Fatigue strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
Abstract
The invention provides a method for enabling a carbon fiber composite thick laminated structure to uniformly absorb resin and a laminated structure. The method comprises the following steps: alternately laying prepreg layers and resin absorbing layers on the surface of a mould till a required thickness design value, and enabling the peripheries of the resin absorbing layers to go beyond a main body prepreg laminated plate; arranging a baffling strip as high as the laminated plate around the laminated plate, connecting the resin absorbing layers by using a breathable material, and enabling the breathable material to penetrate through the baffling strip to allow the resin absorbing layers to be communicated with an external air pumping system; laying auxiliary materials on the laminated plate sequentially, tightly sealing a vacuum bag by using sealing adhesive, and putting a whole system into a hot pressing tank for curing so as to obtain a laminated plate structure with uniformly distributed resin. Through the adoption of the method, the problem that resin cannot be uniformly absorbed in the thickness direction in the curing process of the prepreg laminated plate with the thickness being larger than 5mm is solved; the resin is uniformly distributed inside the obtained thick laminated plate; the thick laminated plate has small defects; fatigue resistance, impact toughness and other mechanical properties of the thick laminated plate are greatly improved.
Description
Technical field
The present invention relates to a kind of carbon fibre composite thick-layer and close even structure suction gluing method and laminate structures, belong to composite material forming field, be applicable to manual lay or the certain thickness laminated composite plate structures of automatic placement molding.
Background technology
By the common process of prepreg forming composite structure be: directly with prepreg lay to the laminate (period can have as required be pumped through journey in advance) of expectation thickness, after envelope, laminate is put into baking oven or autoclave, curing molding under uniform temperature, pressure and time.
And the prepreg system that adopt thicker when laminated plate structure be when gummosis amount is larger in the curing process, away from the laying of die surface due near inhaling glue material, causes gummosis amount more; The laying of close die surface and middle part laying are away from suction glue material, and gummosis amount is less.Like this, easily cause laminate to inhale glue in a thickness direction in the curing process uneven, thus make defects such as producing resin inequality, hole in plate, loosen, this greatly can reduce the mechanical property of composite structure.Fig. 1 is the pack schematic diagram of the solidification prepreg plywood usually adopted in prior art.
In Fig. 1, by laminate lay on mould, the blend stop highly roughly equal with it is put around laminate, put the auxiliary material such as release cloth, suction adhesive plaster, barrier film, all pressing plate, airfelt and vacuum bag more successively, finally vacuum bag is tightly tamping with fluid sealant, prevents gas leakage, then this system is put into autoclave be cured according to certain curing cycle.
Due to release cloth with inhale adhesive plaster all on laminate top layer, as shown in Figure 2, in the curing process, the two can resin in absorbed layer plywood, such that the gummosis amount of laminate top laying is more, resin content is less; And in the middle part of laminate or bottom does not have bump contact to inhale glue material, therefore gummosis amount is less, resin content is higher, and this can cause the top of laminate and bottom to occur resin content gradient, and namely resin content is uneven.When laminate thickness is larger, this problem is particularly evident.Occur in laminate that resin content is uneven, easily make defects such as producing hole in plate, loosen, this greatly can reduce the mechanical property of composite structure.
Summary of the invention
The present invention is intended to propose a kind of thicker laminate and obtains the uniform laminate of through-thickness suction glue in the curing process, this is conducive to reducing resin distribution inequality in composite structure, hole, the defect such as loose, thus the mechanical property of raising composite and anti-fatigue performance.
Inhale the uneven problem of glue to solve on thick-layer plywood through-thickness, technical solution of the present invention is:
A kind of carbon fibre composite thick-layer closes even structure and inhales gluing method,
Replace lay prepreg overlay at die surface, inhale glue-line and take out in advance, until obtain required thickness design load, and make the edge of suction glue-line exceed main body prepreg plywood;
Around laminate, put the blend stop highly equal with it, after being coupled together by each suction glue-line with gas permeable material, through blend stop, make itself and outside extract system keep ventilating unobstructed;
Auxiliary material are put successively again on laminate, comprise release cloth, suction adhesive plaster, barrier film, all pressing plate, airfelt and vacuum bag, finally with fluid sealant, vacuum bag is tightly tamping, then this system is put into autoclave is cured, obtain the uniform laminated plate structure of resin distribution.
Further, described suction glue-line is glass-fiber-fabric, carbon fiber dry gauze or the prepreg material lower than main body prepreg resin content.Concrete selection and consumption, can specific requirement designs according to main body prepreg overlay design in laminate, structural requirement, total suction glue amount be how many etc.
Further, carbon fiber composite layer plywood thickness is greater than 5mm.
Further, the edge of inhaling glue-line exceeds the edge 3-5mm of main body prepreg plywood, makes itself and system inhale glue material and connects into passage, smooth, even to ensure that described composite laminated plate inhales glue passage in the curing process.
A kind of laminated composite plate structures, comprise the main body prepreg plywood of alternately lay successively, inhale glue-line, inhale the area that glue-line laying area is greater than main body prepreg plywood, each suction glue-line is connected with gas permeable material, blend stop is provided with around main body prepreg plywood, the height of blend stop is equal with the height of main body prepreg plywood, and gas permeable material is through blend stop; Main body prepreg plywood, the common top of suction glue-line successively lay have auxiliary material, and auxiliary material comprise release cloth, suction adhesive plaster, barrier film, all pressing plate, airfelt and vacuum bag.
Smooth in order to ensure that this laminate inhales glue passage in the curing process, make the suction glue-line laying area added be greater than the area of main body prepreg plywood, and make the suction glue-line that adds and system inhale glue material to connect into air guide channel.
Further, described suction glue-line is glass-fiber-fabric, carbon fiber dry gauze or the prepreg material lower than main body prepreg resin content.
Further, carbon fiber composite layer plywood thickness is greater than 5mm.
Further, the edge of inhaling glue-line exceeds the edge 3-5mm of main body prepreg plywood.
At the prepreg overlay of die surface lay 1-3mm, lay one deck or certain thickness suction glue-line on the prepreg overlay of lay, the thick main body prepreg overlay of lay 1-3mm is continued again on this suction glue-line, add one deck or certain thickness suction glue-line subsequently again, then continue lay main body prepreg overlay.
Inhale glue line material and can be glass-fiber-fabric or the material such as carbon fiber dry gauze or the prepreg lower than main body prepreg resin content.
In order to ensure that the decline of warpage and performance structure does not appear in laminate, the laying direction of this suction glue-line requires to carry out appropriate design according to concrete mechanical requirements and ply angles.
Continue the main body prepreg continuing lay 1-3mm thickness on this suction glue-line.For ensure these follow-up laies laminate in even suction glue on thickness direction, again on the thick main body prepreg overlay of the 1-3mm of institute's lay, put one deck or certain thickness suction glue-line.
In order to ensure to guide liquid resin to flow out along direction in glass-fiber-fabric or the dry yarn face of carbon fiber in solidification process, making the width of suction glue-line exceed main body prepreg plywood and being about 3-5mm, making it be connected with extract system, to contribute to resin seepage flow.
Be insert to inhale glue-line between two 1-3mm thick layer plywood, the specific requirements such as binder course plywood Lay up design, structural requirement, total suction glue amount are how many can carry out suitable change, and period takes out in advance to laminate as required.Finally according to total lay thickness of laminate, circulation above-mentioned steps, until reach required thickness design load.
After lay, with reference to conventional autoclave bagging method, sealing is carried out to above-mentioned laminate and pack, put into autoclave and be cured.The curing mechanism of concrete solidification temperature and pressure reference main body prepreg sets.After completing solidification, obtain inhaling the uniform laminated plate structure of glue.
The invention has the beneficial effects as follows: what solve that thickness is greater than that the prepreg plywood of 5mm occurs in the curing process inhales the uneven problem of glue on laminate thickness direction.Compared to the thick-layer plywood that traditional laying method makes, in the thick-layer plywood that the present invention obtains, resin distribution is even, defect is few, and its mechanical property such as fatigue durability, impact flexibility is all greatly improved, and meets and is applicable to multiple military service, application requirement.
Accompanying drawing explanation
Fig. 1 is conventional laminate solidification bagging system schematic diagram;
Fig. 2 be traditional laminate in the curing process, bottom laminate top and laminate, easily there is the schematic diagram inhaling glue amount difference;
Fig. 3 inserts the schematic diagram inhaling glue-line in the suitable thickness position of laminate;
Fig. 4 is the schematic diagram inserting the consecutive steps inhaling glue-line, is the continued operation in order to lay design thickness laminate;
Fig. 5 is the schematic diagram after lay to the final design thickness of laminate, it contains multiple laminate and inhales glue-line, but the two general thickness and design thickness roughly the same, and suction glue-line is not put at top, putting release cloth, inhaling the materials such as adhesive plaster when being to finally pack;
Fig. 6 is the side view that gas permeable material connects that each inhales glue-line;
Fig. 7 is the top view that gas permeable material connects that each inhales glue-line;
Fig. 8 is the pack schematic diagram of the laminate placement process after improving.
Wherein: 01-mould, 02-laminate, 03-inhales glue-line, 04-blend stop, 05-gas permeable material, 06-release cloth, and 07-inhales adhesive plaster, 08-barrier film, the equal pressing plate of 09-, 10-airfelt, 11-vacuum bag, 12-fluid sealant.
Detailed description of the invention
The preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing.
Embodiment
Embodiment is a kind of in the process with prepreg laying laminated composite plate structures, when laminate 02 lay is to certain thickness, the suitable prepreg adding glass-fiber-fabric or carbon fiber dry gauze or lower resin content, makes laminate 02 obtain through-thickness after hardening and inhales the uniform structure of glue.Be applicable to comparatively large, that resin content the is higher laminate 02 of thickness solidify.Zero inhales adhesive process or adopts lay this method inapplicable of zero suction glue prepreg.
Embodiment can be avoided occurring that in Fig. 2, resin content gradient appears in top 02a and bottom 02b, makes laminate 02 resin content in a thickness direction even, to improve its mechanical property.
The uneven problem of glue is inhaled in order to solve thick-layer plywood, embodiment carries out lay by the method shown in Fig. 3, namely on mould 01 after the certain thickness laminate 021 of lay, not continue lay main body prepreg overlay, but the prepreg 031 of lay one deck or certain thickness glass-fiber-fabric or the dry yarn of carbon fiber or lower resin content.Resin content due to 031 lower than the resin content of laminate 021, therefore in the curing process, 031 effect playing resin in absorbed layer plywood 021.
The thickness of the prepreg 031 of glass-fiber-fabric or the dry yarn of carbon fiber or lower resin content need totally be inhaled glue amount etc. according to the mechanical property of concrete laminate, structural design, laminate 02 and require to design.
As Fig. 4, continue lay main body prepreg overlay 022 on 031, and then on laminate 022 prepreg 032 of lay one deck or certain thickness glass-fiber-fabric or the dry yarn of carbon fiber or lower resin content.
Again, the thickness of the prepreg 032 of glass-fiber-fabric or the dry yarn of carbon fiber or lower resin content need require to design according to the mechanical property of concrete laminate, structural design, the overall glue amount etc. of inhaling of laminate 02.
By aforesaid operations successively lay laminate 021, inhale glue-line 031, laminate 022, inhale glue-line 032 ..., laminate 02n-1, inhale glue-line 03n-1, laminate 02n, until lay is to the general thickness of laminate 02, as shown in Figure 5.
Same, laminate 021, inhale glue-line 031, laminate 022, inhale glue-line 032 ..., laminate 02n-1, inhale glue-line 03n-1, the thickness of laminate 02n need totally inhale glue amount etc. according to the mechanical property of concrete laminate, structural design, laminate 02 and require design.
In order to ensure suction glue-line 031 in insert layer plywood 02,032 ..., 03n-1 effectively inhales glue in the curing process, after being coupled together by each suction glue-line, through blend stop 04, itself and outside extract system kept clear with gas permeable material 05.As shown in Figure 6, the floor map of connection as shown in Figure 7 for the side schematic view connected.
The blend stop 04 highly roughly equal with it is put around laminate 02, the auxiliary material such as release cloth 06, suction adhesive plaster 07, barrier film 08, all pressing plate 09, airfelt 10 and vacuum bag 11 are put again successively on laminate 02n, finally vacuum bag 11 is tightly tamping with fluid sealant 12, prevents gas leakage, as shown in Figure 8.Again this system is put into autoclave to be cured according to certain curing cycle, finally obtain the uniform laminated plate structure of resin distribution.
As shown in Figure 8, this kind of laminated composite plate structures, comprise the main body prepreg plywood 02 of alternately lay successively, inhale glue-line 03, inhale the area that glue-line 03 laying area is greater than main body prepreg plywood 02, each suction glue-line 03 is connected with gas permeable material 05, around main body prepreg plywood 02, be provided with blend stop 04, the height of blend stop 04 is equal with the height of main body prepreg plywood 02, and gas permeable material 05 is through blend stop 04; Main body prepreg plywood 02, the common top of suction glue-line 03 successively lay have auxiliary material, and auxiliary material comprise release cloth 06, suction adhesive plaster 07, barrier film 08, all pressing plate 09, airfelt 10 and vacuum bag 11.Inhaling glue-line 03 is glass-fiber-fabric, carbon fiber dry gauze or the prepreg material lower than main body prepreg resin content.
Smooth in order to ensure to inhale glue passage in the curing process, make the suction glue-line 03 laying area added be greater than the area of main body prepreg plywood 02, and make the suction glue-line 03 added connect into air guide channel with system gas permeable material 05.
Claims (8)
1. carbon fibre composite thick-layer closes an even structure suction gluing method, it is characterized in that:
Replace lay prepreg overlay at die surface, inhale glue-line, until obtain required thickness design load, and make the edge of suction glue-line exceed main body prepreg plywood;
Around laminate, put the blend stop highly equal with it, after being coupled together by each suction glue-line with gas permeable material, through blend stop, make itself and outside extract system keep ventilating unobstructed;
Auxiliary material are put successively again on laminate, comprise release cloth, suction adhesive plaster, barrier film, all pressing plate, airfelt and vacuum bag, finally with fluid sealant, vacuum bag is tightly tamping, then this system is put into autoclave is cured, obtain the uniform laminated plate structure of resin distribution.
2. carbon fibre composite thick-layer as claimed in claim 1 closes even structure suction gluing method, it is characterized in that: described suction glue-line is glass-fiber-fabric, carbon fiber dry gauze or the prepreg material lower than main body prepreg resin content.
3. carbon fibre composite thick-layer as claimed in claim 1 or 2 closes even structure suction gluing method, it is characterized in that: carbon fiber composite layer plywood thickness is greater than 5mm.
4. carbon fibre composite thick-layer as claimed in claim 1 or 2 closes even structure suction gluing method, it is characterized in that: the edge of inhaling glue-line exceeds the edge 3-5mm of main body prepreg plywood.
5. the carbon fiber composite layer that described in an any one of claim 1-4, method obtains closes structure, it is characterized in that: comprise the main body prepreg plywood of alternately lay successively, inhale glue-line, inhale the area that glue-line laying area is greater than main body prepreg plywood, each suction glue-line is connected with gas permeable material, blend stop is provided with around main body prepreg plywood, the height of blend stop is equal with the height of main body prepreg plywood, and gas permeable material is through blend stop; Main body prepreg plywood, the common top of suction glue-line successively lay have auxiliary material, and auxiliary material comprise release cloth, suction adhesive plaster, barrier film, all pressing plate, airfelt and vacuum bag.
6. carbon fiber composite layer as claimed in claim 5 closes structure, it is characterized in that: described suction glue-line is glass-fiber-fabric, carbon fiber dry gauze or the prepreg material lower than main body prepreg resin content.
7. the carbon fiber composite layer as described in claim 5 or 6 closes structure, it is characterized in that: carbon fiber composite layer plywood thickness is greater than 5mm.
8. the carbon fiber composite layer as described in claim 5 or 6 closes structure, it is characterized in that: the edge of inhaling glue-line exceeds the edge 3-5mm of main body prepreg plywood.
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| CN201410656752.3A CN104401092B (en) | 2014-11-18 | 2014-11-18 | Carbon fibre composite thick-layer closes even structure and inhales gluing method and laminate structures |
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| CN201410656752.3A CN104401092B (en) | 2014-11-18 | 2014-11-18 | Carbon fibre composite thick-layer closes even structure and inhales gluing method and laminate structures |
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| CN104401092B CN104401092B (en) | 2016-04-13 |
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| CN105729820A (en) * | 2016-03-12 | 2016-07-06 | 安徽佳力奇航天碳纤维有限公司 | Carbon fiber composite material laminating process |
| CN106584886A (en) * | 2016-12-28 | 2017-04-26 | 中航沈飞民用飞机有限责任公司 | Process for controlling thickness of glued rubber layer by using self-made rubber cover plate |
| CN107283866A (en) * | 2017-05-25 | 2017-10-24 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | The purposes of porous ceramics and the method for carrying out non-autoclave prepreg shaping |
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| CN111648027A (en) * | 2020-05-26 | 2020-09-11 | 南京工业大学 | High-performance carbon fiber laminated plate based on ultrathin fiber prepreg and preparation method thereof |
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| CN114211781A (en) * | 2021-11-29 | 2022-03-22 | 成都中玻复合材料有限公司 | Carbon fiber helicopter engine blade forming device and forming method |
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| CN114161737A (en) * | 2021-12-03 | 2022-03-11 | 广东汇天航空航天科技有限公司 | Method for forming composite material part, composite material part and aircraft |
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