CN104742382A - Pressure-assisted VARI (vacuum assisted resin infusion) forming device and method - Google Patents

Pressure-assisted VARI (vacuum assisted resin infusion) forming device and method Download PDF

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Publication number
CN104742382A
CN104742382A CN201510170911.3A CN201510170911A CN104742382A CN 104742382 A CN104742382 A CN 104742382A CN 201510170911 A CN201510170911 A CN 201510170911A CN 104742382 A CN104742382 A CN 104742382A
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CN
China
Prior art keywords
vacuum
bed die
resin
mold
vari
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510170911.3A
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Chinese (zh)
Inventor
余木火
周金利
潘利剑
朱姝
孙泽玉
丁小马
李丙鹏
倪加其
徐英凯
贾文品
程超
陶磊
张照
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Donghua University
National Dong Hwa University
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Donghua University
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Publication date
Application filed by Donghua University filed Critical Donghua University
Priority to CN201510170911.3A priority Critical patent/CN104742382A/en
Publication of CN104742382A publication Critical patent/CN104742382A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B29C70/46Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B29C70/48Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
    • 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 provides a pressure-assisted VARI (vacuum assisted resin infusion) forming device and method, which relate to an impressed pressure assisted VARI forming device. The pressure-assisted VARI forming device comprises an upper forming mold, a lower forming mold, an upper-lower mold fixing device, a pressurization device, a vacuum pump and a resin injection device. The device and method disclosed by the invention can solve the problem that the volume content of a composite fiber in an existing VARI forming product is relatively low due to insufficient vacuum pressurization, and defects such as holes, dry spots and the like exist in the product, so that the existing VARI forming product can not meet the structure requirements of high-performance composites. The device and method disclosed by the invention play the advantages of pressurized curing of an autoclave, and make up for inadequacies in the vacuum pressurization of VARI forming, so that an effect of enhancing advantage and avoiding disadvantage is achieved, and then the advantages of the VARI process in the aspects of reducing the manufacturing cost of composites and implementing the integrated forming of large-sized members can be fully played.

Description

A kind of pressure assisted vacuum instillation process shaped device and method
Technical field
The present invention relates to the device and method that a kind of impressed pressure assisted vacuum instillation process is shaping, belong to technical field of composite material molding.
Background technology
Because advanced composite material has specific strength and high, the excellent plurality of advantages such as designability and good fatigue resistance of specific modulus, the fields such as Aero-Space, fan blade, communications and transportation, building, sports goods and mechanotronics are widely used in.With regard to aerospace field, advanced composite material can realize the overall loss of weight of aircaft configuration, improves the combination property of aircraft, and the height of composite consumption becomes the important indicator weighing aircraft advance.These are various new material, new technology represents and provides broad stage, but it is high costs that composite faces most distinct issues, and this limits the further expansion of polymer matrix composites application to a certain extent.
Vacuum assisted resin pouring and forming process (vacuum perfusion process, hereinafter referred to as VARI) with its low cost, high-quality, process flexibly advantage become the novel method of preparation large scale, the complicated product of heavy thickness gradually.It is under vacuum, utilizes the flowing of resin to permeate the dipping realized fiber and fabric thereof, and the forming method solidified under vacuo, this technique has been used successfully to the civilian industry fields such as naval vessel, military installations, defence engineering, aviation and wind-powered electricity generation.But existing VARI moulded products is not enough due to vacuum pressed, causes composites fiber volume fraction relatively not high, there is the defect such as hole, dry spot in goods, the problem of high-performance composite materials structural requirement cannot be met.Therefore, develop and build new composite material process planning method and undoubtedly the development of composite is played an important role.
Summary of the invention
The technical problem to be solved in the present invention is that the auxiliary VARI that carries out pressurizeing is shaping, to meet composite material forming low cost, high performance requirement.
In order to solve the problems of the technologies described above, a technical scheme of the present invention there is provided a kind of pressure assisted vacuum instillation process shaped device, it is characterized in that, comprising can the mold of folding and bed die, be provided with the pressure inlet running through whole mold along short transverse on the upper mold, vacuum perfusion process profiled part is positioned at the cavity of bed die, the part being positioned at cavity both sides at bed die has the resin injection mouth and vacuum orifice that communicate with the die cavity of bed die, wherein, pressure inlet is connected with pressue device, resin injection mouth is connected with resin system, vacuum orifice is connected with vavuum pump through resin trap.
Preferably, described mold and bed die are separately fixed in respective fixture, are provided with the bubble-tight sealing strip of air-tightness for ensureing mold or bed die at fixture place.
Preferably, described fixture is bolt, at the surrounding corresponding bolt hole equidistantly remaining for set bolt in advance respectively of described mold or described bed die.
Preferably, composite material component is positioned at the central authorities of described bed die cavity, and described vacuum perfusion process profiled part comprises release cloth and the vacuum bag film one of lay from bottom to top, and flow media is between release cloth and vacuum bag film one.
Preferably, the edge of described vacuum bag film is bonded on described bed die by fluid sealant.
Preferably, at outside lay one deck vacuum bag film two of described vacuum perfusion process shaped device.
Another technical scheme of the present invention there is provided a kind of pressure assisted vacuum instillation process forming method based on above-mentioned pressure assisted vacuum instillation process shaped device, it is characterized in that, composite material component is placed in the cavity central authorities of described bed die, the vacuum perfusion process profiled part of lay complete set subsequently, after mold and bed die matched moulds, vacuumized by vacuum orifice, resin injects via resin injection mouth, after completing resin perfusion, pressue device is pressurizeed by pressure inlet, until composite material solidification.
Preferably, specifically comprise the steps:
Step 1, in bed die cavity central authorities spraying releasing agent, being laid in by carbon cloth complete for cutting scribbles on the position of releasing agent, and lay release cloth and flow media, fluid sealant is affixed in carbon cloth surrounding, lay vacuum bag film one afterwards, form vacuum perfusion process profiled part, reserved vacuum orifice and resin injection mouth, check and ensure the air-tightness of vacuum perfusion process profiled part, then, lay sealing joint strip on mold and bed die, it also fixes by fixture by closed mold and bed die;
Step 2, with vavuum pump, the vacuum perfusion process profiled part in bed die to be vacuumized, pressurize a period of time, detect vacuum;
After step 3, vacuum are up to standard, pour into resin from resin injection mouth, until whole carbon cloth filled by resin;
Step 4, treat that resin pours into after, pressue device is pressurizeed by pressure inlet, until after resin solidification, formed composite material component.
Advantage of the present invention is: compared with existing VARI molding mode, the present invention is additional pressure servicing unit, and its fiber volume fraction can significantly improve, and the defects such as hole can obviously reduce; Compared with existing autoclave molding method, the present invention does not need the high investment of hot-press equipment, and forming process is relatively simple, can greatly reduce the cost of composite material forming.The composite material component performance completed significantly improves, and cost significantly declines, and has broad application prospects.
Accompanying drawing explanation
Fig. 1 is that pressure of the present invention assists VARI shaped device schematic diagram;
Fig. 2 is integrally forming mould structural representation;
Fig. 3 is VARI shaping schematic view in bed die;
Wherein, 1. mold 2. bed die 3. pressure inlet 4. resin injection mouth 5. vacuum orifice 6. upper/lower die fixture 7. resin system 8. pressue device 9. resin trap 10. vavuum pump 11. composite material component 12. release cloth 13. flow media 14. vacuum bag film 15. vacuum bag film 16. fluid sealant.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
Refer to Fig. 1, it is that pressure of the present invention assists VARI shaped device schematic diagram.Described pressure assists VARI shaped device to comprise mold 1, bed die 2, pressure inlet 3, resin injection mouth 4, vacuum orifice 5, and the fixture 6 of upper/lower die, wherein all there is sealing strip at fixture 6 place of upper/lower die, and fixes with equally spaced bolt.
Refer to Fig. 2, it is integrally forming mould structural representation of the present invention.Described integrally forming mould comprises resin system 7, pressue device 8, resin trap 9 and vavuum pump 10, wherein resin system 7 is connected with resin injection mouth 4, pressue device 8 is connected with pressure inlet 3, and resin trap 9 is connected with vacuum orifice 5, and is connected on vavuum pump 10.
Refer to Fig. 3, it is VARI shaping schematic view in bed die 2 of the present invention.Described VARI shaping schematic view comprises composite material component 11, release cloth 12, flow media 13, vacuum bag film 1, vacuum bag film 2 15, fluid sealant 16.
It is shaping that composite material component carries out VARI in bed die 2, and realize the cure under pressure shaping to VARI by the pressue device 8 in mold 1.Its concrete steps are as follows:
Step 1, provide and comprise sealing joint strip, fixture 6, mould that geomery is suitable;
Step 2, bed die 2 central authorities spraying releasing agent, carbon cloth lay complete for cutting is scribbled the position of releasing agent, and lay release cloth 12, flow media 13, fluid sealant 16 is affixed in carbon cloth surrounding, lay vacuum bag film 1 and vacuum bag film 2 15 afterwards, reserved vacuum orifice 5 and resin injection mouth 4, check and the air-tightness of assurance device; Then lay sealing joint strip on mold 1 and bed die 2, closed mold 1, bed die 2 used fixture 6 to fix.
Step 3, to vacuumize with the VARI device in vavuum pump 10 pairs of bed dies 2, pressurize a period of time, detect vacuum.
After step 4 vacuum is up to standard, pour into resin from resin injection mouth 4, until whole carbon cloth filled by resin.
It is complete that step 5 treats that resin pours into, and suppresses power from pressure inlet 3.
Step 6 cured resin, forms composite material component.

Claims (8)

1. a pressure assisted vacuum instillation process shaped device, it is characterized in that, comprising can the mold (1) of folding and bed die (2), mold (1) is provided with the pressure inlet (3) running through whole mold (1) along short transverse, vacuum perfusion process profiled part is positioned at the cavity of bed die (2), the part being positioned at cavity both sides at bed die (2) has the resin injection mouth (4) and vacuum orifice (5) that communicate with the die cavity of bed die (2), wherein, pressure inlet (3) is connected with pressue device (8), resin injection mouth (4) is connected with resin system (7), vacuum orifice (5) is connected with vavuum pump (10) through resin trap (9).
2. require described pressure assisted vacuum instillation process shaped device according to right 1, it is characterized in that: described mold (1) and bed die (2) are separately fixed in respective fixture (6), being provided with the bubble-tight sealing strip of air-tightness for ensureing mold (1) or bed die (2) at fixture (6) place.
3. require described pressure assisted vacuum instillation process shaped device according to right 2, it is characterized in that: described fixture (6) is bolt, at the surrounding corresponding bolt hole equidistantly remaining for set bolt in advance respectively of described mold (1) or described bed die (2).
4. require described pressure assisted vacuum instillation process shaped device according to right 1, it is characterized in that: composite material component (11) is positioned at the central authorities of described bed die (2) cavity, described vacuum perfusion process profiled part comprises release cloth (12) and the vacuum bag film one (14) of lay from bottom to top, and flow media (13) is positioned between release cloth (12) and vacuum bag film one (14).
5. require described pressure assisted vacuum instillation process shaped device according to right 4, it is characterized in that: the edge of described vacuum bag film (14) is bonded on described bed die (2) by fluid sealant (16).
6. require described pressure assisted vacuum instillation process shaped device according to right 1, it is characterized in that: at outside lay one deck vacuum bag film two (15) of described vacuum perfusion process shaped device.
7. the pressure assisted vacuum instillation process forming method based on pressure assisted vacuum instillation process shaped device according to claim 1, it is characterized in that, composite material component (11) is placed in the cavity central authorities of described bed die (2), the vacuum perfusion process profiled part of lay complete set subsequently, after mold (1) with bed die (2) matched moulds, vacuumized by vacuum orifice (5), resin injects via resin injection mouth (4), after completing resin perfusion, pressue device (8) is pressurizeed by pressure inlet (3), until composite material solidification.
8. pressure assisted vacuum instillation process forming method according to claim 7, is characterized in that, specifically comprise the steps:
Step 1, central authorities' spraying releasing agent in bed die (2) cavity, being laid in by carbon cloth complete for cutting scribbles on the position of releasing agent, and lay release cloth (12) and flow media (13), fluid sealant is affixed in carbon cloth surrounding, lay vacuum bag film one (14) afterwards, form vacuum perfusion process profiled part, reserved vacuum orifice and resin injection mouth, check and ensure the air-tightness of vacuum perfusion process profiled part, then, at mold (1) and the upper lay sealing joint strip of bed die (2), closed mold (1) and bed die (2) also use fixture (6) fixing,
Step 2, with vavuum pump (10), the vacuum perfusion process profiled part in bed die (2) to be vacuumized, pressurize a period of time, detect vacuum;
After step 3, vacuum are up to standard, pour into resin from resin injection mouth (4), until whole carbon cloth filled by resin;
Step 4, treat that resin pours into after, pressue device (8) by pressure inlet (3) pressurization, until after resin solidification, formed composite material component.
CN201510170911.3A 2015-04-10 2015-04-10 Pressure-assisted VARI (vacuum assisted resin infusion) forming device and method Pending CN104742382A (en)

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CN201510170911.3A CN104742382A (en) 2015-04-10 2015-04-10 Pressure-assisted VARI (vacuum assisted resin infusion) forming device and method

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104999675A (en) * 2015-07-06 2015-10-28 湖北三江航天红阳机电有限公司 Preparation method of small-sized thermal protective composite material screws
CN106338417A (en) * 2015-09-01 2017-01-18 湖北航天化学技术研究所 Solid propellant pressure curing detection sample die tool
CN107914406A (en) * 2017-11-16 2018-04-17 江苏恒神股份有限公司 A kind of new vacuum imports shaping big height difference product device and process
CN108162433A (en) * 2018-03-01 2018-06-15 江苏金风科技有限公司 Priming by vacuum auxiliary device and vacuum perfusion process
CN109177236A (en) * 2018-11-05 2019-01-11 陕西碳能新材料有限责任公司 A kind of abnormity composite material battery case molding die and forming method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014204672A1 (en) * 2013-06-20 2014-12-24 GKN Aerospace Services Structures, Corp. Method for infusing resin into a composite laminate

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014204672A1 (en) * 2013-06-20 2014-12-24 GKN Aerospace Services Structures, Corp. Method for infusing resin into a composite laminate

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104999675A (en) * 2015-07-06 2015-10-28 湖北三江航天红阳机电有限公司 Preparation method of small-sized thermal protective composite material screws
CN106338417A (en) * 2015-09-01 2017-01-18 湖北航天化学技术研究所 Solid propellant pressure curing detection sample die tool
CN107914406A (en) * 2017-11-16 2018-04-17 江苏恒神股份有限公司 A kind of new vacuum imports shaping big height difference product device and process
CN108162433A (en) * 2018-03-01 2018-06-15 江苏金风科技有限公司 Priming by vacuum auxiliary device and vacuum perfusion process
CN109177236A (en) * 2018-11-05 2019-01-11 陕西碳能新材料有限责任公司 A kind of abnormity composite material battery case molding die and forming method

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