CN102582092A - Vacuum infusion molding method for thick-size carbon fiber product - Google Patents
Vacuum infusion molding method for thick-size carbon fiber product Download PDFInfo
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- CN102582092A CN102582092A CN2012100549772A CN201210054977A CN102582092A CN 102582092 A CN102582092 A CN 102582092A CN 2012100549772 A CN2012100549772 A CN 2012100549772A CN 201210054977 A CN201210054977 A CN 201210054977A CN 102582092 A CN102582092 A CN 102582092A
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- fiber product
- infusion molding
- molding method
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 64
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 64
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000000465 moulding Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000009755 vacuum infusion Methods 0.000 title claims abstract description 34
- 239000003292 glue Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 230000010412 perfusion Effects 0.000 claims description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 31
- 229910052799 carbon Inorganic materials 0.000 claims description 31
- 239000004744 fabric Substances 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000003204 osmotic effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000010409 thin film Substances 0.000 abstract 2
- 229920000742 Cotton Polymers 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 10
- 230000037452 priming Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 210000002615 epidermis Anatomy 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Abstract
The invention relates to a vacuum infusion molding method for a thick-size carbon fiber product, which comprises the following steps of: adopting vacuum infusion molding and manufacturing the large-size and thick-carbon fiber product by utilizing a vacuum infusion process; paving a rigid porous plate on a carbon fiber product mold; paving glue suction cotton on the upper surface of the porous plate and sealing the lower part of a vacuum suction nozzle by using a VAP thin film; and controlling the negative gradient of a filling body by using the VAP thin film and vacuum-pumping the carbon fiber product module so as to finish the vacuum infusion molding.
Description
Technical field
The present invention relates to a kind of preparation method of composite, refer in particular to a kind of thick size carbon fibre composite vacuum infusion molding method, be technical field of composite material molding, be mainly used in thick size carbon fibre composite vacuum infusion molding technology.
Technical background
Carbon fibre composite is widely used in each field such as space flight, aviation, wind electricity blade with its high specific strength and high ratio modulus, and thick size carbon fibre composite spare can alleviate product weight greatly as structure member.
Vacuum perfusion process is as the topmost moulding process of composite, and is quick with its moulding, pollutes low and is applicable to that advantage such as preparation large component etc. is in recent years by broad research and application.Mainly use glass fibre to carry out the form of bottling body during vacuum infusion molding; The glass fibre filament diameter is between 18-25 μ m; Big space is arranged in the corpus fibrosum of piling up behind the vacuum debulk, and such space such as same flow guide system help the mobile perfusion of glue; The tradition method for filling makes glue flow at water conservancy diversion along the injected rubber hose direction on the net by the water conservancy diversion net; In process of flowing, carry out longtitudinal dispersion then again; And the perfusion of the inapplicable carbon fiber of this kind method, because the carbon fiber filament diameter is at 6-8 μ m, the system internal pore is much smaller than fiber glass body behind the vacuum debulk carbon fibrous body; Such condition still can be carried out carrying out thin plate perfusion smallclothes, then can not realize vacuum perfusion process if carry out big product slab perfusion.The gelatin viscosity that is used for priming by vacuum is generally at 160mPa.s-300mPa.s; Use the runner that generally uses at present can realize little product perfusion at perfusion thickness less than the carbon fiber sheet of 10mm, but just be difficult to realize the vacuum perfusion process moulding if use the carbon fibre composite perfusion of the large-sized structural component of thick size with shop layer design.
The carbon current fiber finishes back hot setting moulding under vacuum systems as also being to use the carbon cloth sheet that has prepreg to spread layer in the production of large-sized structural component; Its solidification temperature is generally more than 110 ℃; Because carbon fiber prepreg needs low temperature transportation and low temperature storage; And the production cost of prepreg also will be attached in the material cost, and higher solidification temperature all can be brought influence to mould and energy consumption, so carbon fiber prepreg uses the price of carbon fiber and glue moulding to want high more separately; Also can there be waste material wastes such as leftover pieces in prepreg in use, uses prepreg to produce product like this and can bring production cost of products high.Prepreg on moulding process is owing to be the film with viscosity higher; So layer back is because film can not can exist the certain hole and the phenomenon of local delamination by hundred-percent stickup product in the shop; Can bring influence to the mechanical property and the reliability of product like this, therefore necessary this improved.
Summary of the invention
The objective of the invention is to the problems referred to above, propose a kind of pouring and molding method that is fit to the big product carbon fibrous body of thick size vacuum infusion molding.This forming method neither can bring influence to the mechanical property and the reliability of product, and can reduce the consumptive material of material.
The technical scheme that the present invention takes is:
A kind of thick size carbon fiber product vacuum infusion molding method adopts vacuum infusion molding, utilizes vacuum perfusion process to make large scale, thick carbon fiber product; On carbon fiber product mould, lay the rigidity porous flat plate; Lay at the porous flat plate upper surface again and inhale collodion, and under vacuum slot, use the VAP film to seal, through using the suction gradient of VAP film control bottling body, carbon fiber product mould is vacuumized, thereby accomplish vacuum infusion molding.
Further; Described vacuum perfusion process is below the layer of carbon fiber shop, to lay water conservancy diversion net and release cloth; After making glue pass through the water conservancy diversion net to disperse fast through the water conservancy diversion net that is laid on the corpus fibrosum bottom, layer direction glue rapid osmotic from the bottom to top along vertical shop then; Because so carbon fiber is non axial can't stressed woven cloth very loose; Carbon fiber shop layer can be made by the vacuum bag extruding and form deep mixed fold in the axial direction when carrying out vacuum suction; Therefore the present invention is laid on carbon fiber shop layer upper surface through using the rigidity porous flat plate, guarantees that under vacuum pressure carbon fibrous body is not extruded the flatness that distortion guarantees upper surface.And use the VAP film to seal vacuum slot to guarantee that glue is not drawn in the vacuum tube, finally reaches whole carbon fibrous body form after infiltrating upper surface; The VAP film has the ventilative not function of seep through; This material price is expensive and be disposable consumptive material; Traditional use VAP film seals vacuum to whole perfusion part can make the VAP film use in a large number, through the consumption that this greatly reduces the VAP film that is used of VAP film and vacuum slot.The present invention uses the VAP film to seal vacuum slot and guarantee that glue is not drawn in the vacuum tube, finally reaches whole carbon fibrous body form after infiltrating upper surface.The said suction collodion that between rigidity porous flat plate and VAP film, uses mainly is at the bottling body upper surface the continuous zone of negaive pressure to be provided, and avoids being close to the vacuum that the back reduces upper epidermis because of vacuum bag film and rigidity porous flat plate.
Said water conservancy diversion net undersized is in carbon fiber shop layer, and the water conservancy diversion net is apart from carbon fibrous body edge 20mm-40mm, and said release cloth is used to slough the water conservancy diversion net after the curing; The rigidity porous media is laid on carbon fibrous body top; Said rigidity porous media is used to guarantee the flatness of carbon fibrous body upper surface; On the rigidity porous media, lay and inhale collodion; After vacuumizing, inhale the vacuum that collodion can guarantee upper surface, being used of VAP film and vacuum slot guarantees that glue is not drawn in the vacuum tube after penetrating into upper surface.On this shop layer, lay the vacuum bag film, said vacuum bag film is used to provide the vacuum of whole perfusion system.
The invention has the advantages that: product is owing to adopt vacuum infusion molding, and the product quality is even, at the bubble of eliminating to greatest extent in the product, has guaranteed the quality of product.The vacuum infusion molding that the present invention makes full use of carbon fiber can adopt the mode of vacuum glue perfusion in the characteristics of 70 ℃ of curing, can pour into according to the size of bottling body, unnecessary waste can not occur, and cost of manufacture is lower; Priming by vacuum can guarantee the porosity that goods are minimum in addition, can improve product properties greatly like this, has realized that carbon fiber adopts priming by vacuum, is suitable for very much the carbon fiber product of large scale, thick product.The present invention can realize the vacuum infusion molding of large scale, thick product carbon fibrous body; Glue flows evenly in filling process; Perfusion back corpus fibrosum glue content can be controlled at 28%-32%; Because glue is to soak into corpus fibrosum from the bottom to top to guarantee can to realize the supervision to whole perfusion part in the filling process, whether said method for monitoring can be observed carbon fiber and soaked into by glue through at diverse location the rigidity porous flat plate being opened the square osculum of several 20mm.The carbon fibrous body maximum ga(u)ge of priming by vacuum can reach 70mm, almost can realize the form of all carbon fiber composite structure parts goods.Compare form with the carbon fiber prepreg moulding process and have advantages such as low porosity, low solidification temperature, product mechanical performance height and product cost are low.
Description of drawings
Fig. 1 is a thick size carbon fiber product vacuum infusion molding technology water conservancy diversion sketch map among the embodiment;
Fig. 2 is a thick size carbon fiber product vacuum infusion molding technology water conservancy diversion diagrammatic top view among the embodiment;
Fig. 3 is a rigidity porous flat plate sketch map in the embodiment of the invention;
Fig. 4 is a vacuum slot sketch map in the embodiment of the invention.
The specific embodiment
To combine accompanying drawing and embodiment that the present invention is done further description below; Obviously; Embodiment in describing below and accompanying drawing only are part instances of the present invention; For those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing and embodiment according to these accompanying drawings.
Through accompanying drawing can find out the present invention relates to a kind of in thick size carbon fiber product vacuum infusion molding method, adopt vacuum infusion molding, utilize vacuum perfusion process to make large scale, thick carbon fiber product; On carbon fiber product mould, lay the rigidity porous flat plate; Lay at the porous flat plate upper surface again and inhale collodion, and under vacuum slot, use the VAP film to seal, through using the suction gradient of VAP film control bottling body, carbon fiber product mould is vacuumized, thereby accomplish vacuum infusion molding.
Further; Described vacuum perfusion process is; Below carbon fiber shop layer, lay water conservancy diversion net and release cloth, after making glue pass through the water conservancy diversion net to disperse fast through the water conservancy diversion net that is laid on the corpus fibrosum bottom, layer direction glue rapid osmotic from the bottom to top along vertical shop then; Because so carbon fiber is non axial can't stressed woven cloth very loose; Carbon fiber shop layer can be made by the vacuum bag extruding and form deep mixed fold in the axial direction when carrying out vacuum suction; Therefore the present invention is laid on carbon fiber shop layer upper surface through using the rigidity porous flat plate; Guarantee that under vacuum pressure carbon fibrous body is not extruded distortion, guarantees the flatness of upper surface.And use the VAP film to seal vacuum slot to guarantee that glue is not drawn in the vacuum tube, finally reaches whole carbon fibrous body form after infiltrating upper surface; The VAP film has the ventilative not function of seep through; This material price is expensive and be disposable consumptive material; Traditional use VAP film seals vacuum to whole perfusion part can make the VAP film use in a large number, through the consumption that this greatly reduces the VAP film that is used of VAP film and vacuum slot.The present invention uses the VAP film to seal vacuum slot and guarantee that glue is not drawn in the vacuum tube, finally reaches whole carbon fibrous body form after infiltrating upper surface.The said suction collodion that between rigidity porous flat plate and VAP film, uses mainly is at the bottling body upper surface the continuous zone of negaive pressure to be provided, and avoids being close to the vacuum that the back reduces upper epidermis because of vacuum bag film and rigidity porous flat plate.
Said water conservancy diversion network arrangements is in the bottom of carbon fiber shop layer; The glue of injected rubber hose is guided to glue the bottom of fiber lay down layer fast through the water conservancy diversion net; Require the thickness of water conservancy diversion net to be not less than 2mm, can not meet the demands through increasing water conservancy diversion stratum reticulare number if water conservancy diversion thickness does not meet the demands.Said water conservancy diversion net undersized is in carbon fiber shop layer, and the water conservancy diversion net is apart from carbon fibrous body edge 20mm-40mm, and said release cloth is used to slough the water conservancy diversion net after the curing; The rigidity porous media is laid on carbon fibrous body top; Said rigidity porous media is used to guarantee the flatness of carbon fibrous body upper surface; On the rigidity porous media, lay and inhale collodion; After vacuumizing, inhale the vacuum that collodion can guarantee upper surface, being used of VAP film and vacuum slot guarantees that glue is not drawn in the vacuum tube after penetrating into upper surface.On this shop layer, lay the vacuum bag film, said vacuum bag film is used to provide the vacuum of whole perfusion system.
Said carbon fiber knit is loose, and upper surface can form the fold along machine direction when vacuumizing, and its rigidity porous flat plate is laid on the flatness of carbon fibrous body upper surface by atmospheric pressure assurance carbon fiber upper surface, makes the product upper surface smooth.Said rigidity porous flat plate is rigid materials such as aluminium alloy, steel plate, and the aperture is at 2mm-4mm, and hole density is at 15mm-25mm.
Said rigidity porous flat plate need use releasing agent to handling in surface and the aperture before use, need remove the glue-line of rigidity porous flat plate after the use, reuses with convenient.
When also can will being used to provide the carbon fiber perfusion for the water conservancy diversion host, the suction collodion of said rigidity porous media upper surface forms the continuous zone of negaive pressure one at perfusion part upper surface.
Being used of said VAP film and vacuum slot; The VAP film costs an arm and a leg, and the present invention uses VAP film and vacuum slot to be used to significantly reduce by the VAP film provides the negative pressure protection to perfusion part envelope vacuum.
Said negative pressure is that vavuum pump provides, and negative pressure requires to reach in the plains region-pour into more than the 0.09MPa, and the requirement after the highlands falls according to per hundred meters pressure is controlled.
The present invention is that the runner lay improves in the traditional vacuum pouring and forming process; Make by the advantage of this film of VAP film and in the process of bleeding, can glue not taken away; Simultaneously according to the direction of arranging that the VAP film can the controlled pressure gradient, and then the flow direction of control glue when carrying out priming by vacuum.
Embodiment:
The expensive large tracts of land use of VAP film value can cause the product cost to rise, through being lowered into the product cost with being used of vacuum slot.Present embodiment is to the carbon fibrous body form instance of the wide 0.5m maximum ga(u)ge of long 58m at 50mm.
Below in conjunction with accompanying drawing the present invention is done and to further describe:
Runner general layout method is shown in accompanying drawing 1; Laying method is: water conservancy diversion net 9 is laid on perfusion mould 1 surface, and water conservancy diversion net 9 is slightly less than bottling body 6, apart from bottling body 6 inward flange 20mm-70mm; On water conservancy diversion net 9, cover release cloth 7, on release cloth 7, lay carbon cloth on request; Bottling body 6 is poured on the carbon cloth, and bottling body 6 outer surfaces are laid release cloth 5; Injected rubber hose 8 is located at the side of water conservancy diversion net 9, and pours into toward bottling body 6 through water conservancy diversion net 9; Lay rigidity porous flat plate 4 at release cloth 5 upper surfaces; Rigidity porous flat plate 4 areas are slightly less than release cloth 5 top surface edge 20mm-30mm; On rigidity porous flat plate 4, be equipped with and inhale collodion or vacuumizing water conservancy diversion net 11 is used for to the bottling body upper surface negative pressure of vacuum layer being provided; Inhale collodion or vacuumizing water conservancy diversion net 11 upper surfaces placement vacuum slot 2; The bottom of vacuum slot 2 uses VAP film 10 to seal, like this vacuumize be whole bottling body during in perfusion when glue penetrates into upper surface from the bottom to top after the VAP film glue and vaccum suction pipe are intercepted the perfusion of assurance carbon fiber bottling body.
Accompanying drawing 3 is evenly equipped with pod apertures 14 for the middle rigidity porous flat plate sketch map of perfusion mould 1 on the rigidity porous flat plate 4, pod apertures 14 apertures are at 2mm-4mm, and hole density is at 15mm-25mm; Rigidity porous flat plate 4 is that rigid materials such as aluminium alloy, steel plate are made.
Claims (10)
1. a thick size carbon fiber product vacuum infusion molding method adopts vacuum infusion molding, utilizes vacuum perfusion process to make large scale, thick carbon fiber product, it is characterized in that: on carbon fiber product mould, lay the rigidity porous flat plate; Lay the suction collodion at the porous flat plate upper surface, and under vacuum slot, use the VAP film to seal, through using the suction gradient of VAP film control bottling body, carbon fiber product mould is vacuumized, thereby accomplish vacuum infusion molding.
2. thick size carbon fiber product vacuum infusion molding method as claimed in claim 1; It is characterized in that: described vacuum perfusion process is below the layer of carbon fiber shop, to lay water conservancy diversion net and release cloth; After making glue pass through the water conservancy diversion net to disperse fast through the water conservancy diversion net that is laid on the corpus fibrosum bottom, layer direction glue rapid osmotic from the bottom to top along vertical shop then; Because so carbon fiber is non axial can't stressed woven cloth very loose; Carbon fiber shop layer can be made by the vacuum bag extruding and form deep mixed fold in the axial direction when carrying out vacuum suction; It is characterized in that: be laid on carbon fiber shop layer upper surface through using the rigidity porous flat plate; Guarantee that under vacuum pressure carbon fibrous body is not extruded distortion, guarantees the flatness of upper surface; And use the VAP film to seal vacuum slot to guarantee that glue is not drawn in the vacuum tube, finally reaches whole carbon fibrous body form after infiltrating upper surface.
3. thick size carbon fiber product vacuum infusion molding method as claimed in claim 2; It is characterized in that: said water conservancy diversion network arrangements is in the bottom of carbon fiber shop layer; The glue of injected rubber hose is guided to glue the bottom of fiber lay down layer fast through the water conservancy diversion net, and the thickness of water conservancy diversion net is not less than 2mm.
4. thick size carbon fiber product vacuum infusion molding method as claimed in claim 2; It is characterized in that: said carbon fiber knit is loose; Upper surface can form the fold along machine direction when vacuumizing; Its rigidity porous flat plate is laid on the flatness of carbon fibrous body upper surface by atmospheric pressure assurance carbon fiber upper surface, makes the product upper surface smooth.
5. thick size carbon fiber product vacuum infusion molding method as claimed in claim 2; It is characterized in that: said rigidity porous flat plate need use releasing agent to handling in surface and the aperture before use; Need remove the glue-line of rigidity porous flat plate after the use, reuse with convenient.
6. thick size carbon fiber product vacuum infusion molding method as claimed in claim 5 is characterized in that: form the continuous zone of negaive pressure one at perfusion part upper surface when the suction collodion of said rigidity porous media upper surface also can will be used to provide the carbon fiber perfusion for the water conservancy diversion host.
7. thick size carbon fiber product vacuum infusion molding method as claimed in claim 2; It is characterized in that: being used of said VAP film and vacuum slot; The VAP film costs an arm and a leg, and the present invention uses VAP film and vacuum slot to be used to significantly reduce by the VAP film provides the negative pressure protection to perfusion part envelope vacuum.
8. thick size carbon fiber product vacuum infusion molding method as claimed in claim 2; It is characterized in that: said negative pressure is that vavuum pump provides; Negative pressure requires to reach in the plains region-pour into more than the 0.09MPa, and the requirement after the highlands falls according to per hundred meters pressure is controlled.
9. thick size carbon fiber product vacuum infusion molding method as claimed in claim 2, it is characterized in that: be evenly equipped with pod apertures on the said rigidity porous flat plate, the pod apertures aperture is at 2mm-4mm, and hole density is at 15mm-25mm; The rigidity porous flat plate is that rigid materials such as aluminium alloy, steel plate are made.
10. thick size carbon fiber product vacuum infusion molding method as claimed in claim 2; It is characterized in that: the top of said vacuum slot is for vacuumizing suction inlet; Vacuumizing suction inlet is a conical horn suction nozzle; The bottom of conical horn suction nozzle is connected with a filter, has groove on the filter, is provided with capillary in the groove and inhales the hole.
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| CN201210054977.2A CN102582092B (en) | 2012-03-05 | 2012-03-05 | Vacuum infusion molding method for thick-size carbon fiber product |
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| CN103817832A (en) * | 2013-09-26 | 2014-05-28 | 上海飞机制造有限公司 | Mold and method for vacuum filling forming by using mold |
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