CN1631659A - Vacuum auxiliary resin penetration process for composite material and mould therefor - Google Patents
Vacuum auxiliary resin penetration process for composite material and mould therefor Download PDFInfo
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- CN1631659A CN1631659A CN 200510000081 CN200510000081A CN1631659A CN 1631659 A CN1631659 A CN 1631659A CN 200510000081 CN200510000081 CN 200510000081 CN 200510000081 A CN200510000081 A CN 200510000081A CN 1631659 A CN1631659 A CN 1631659A
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Abstract
The invention belongs to complex material shaping technics and the moulds. The technics includes that inject the resin through the injecting system into the soft mould to expand, close the injecting port after the determined resin is all injected and evacuate the mould cavity to let the resin fills the unfilled sections at the edge so to fill the whole cavity with resin. The mould includes upper mould which is ferroglass soft mould, lower mould which is ferroglass hard mould. Injecting and shaping evacuating ports are on the upper mould while equal flow canals and shaping vacuum circuit and fixing vacuum circuit are on the lower mould. Its advantages are that it is environmental, of low cost, and is able to shaping with products of large area and thin walls.
Description
Technical field
The present invention relates to a kind of moulding process and mould of composite, is a kind of vacuum auxiliary resin penetration process for composite material and the mould that is applicable to this technology specifically.
Background technology
Vacuum auxiliary resin penetration process (be called for short RIV, Resin Injection Vacuum) is to utilize the method pressure of vacuum aided resin to be drawn into the moulding process of die cavity from the injection port of mould.This moulding process is to utilize the combination of advantages of injection moulding and vacuum forming to form, and is belong to the composite liquid forming technique a kind of.The liquid molding technology that generally adopts has resin transfer molding (RTM) process at present, and this process upper and lower mould is die, and forming process is invisible, the mold filling process of uncontrollable resin.The patent of announcing in 2003, publication number CN1398717A, introduced a kind of process that is used for the vacuum infiltration forming composite of large scale product, this method need be placed on preform periphery to be had in sealant and the confined space that vacuum bag constituted that binds, air-permeable layer and release cloth are laid in the top of preform, the preparation more complicated of this method, auxiliary material all can not reuse, and fringe cost is than higher.United States Patent (USP) SCRIMP (Seamann CompositeResin Infusion Manufacturing Process) technology is lay release cloth, high permeating medium on reinforcing material, to seal with sealant tape and vacuum bag at last, the assistant formation material market of this method cost an arm and a leg and can not reuse, operating process is loaded down with trivial details, the needs that are not suitable for producing in batches.
Summary of the invention
In order to solve cost height that the composite liquid field shaping technique exists, forming process complexity, problem such as uncontrollable, the invention provides a kind of process and simple to operate, low cost of manufacture, novel evacuated injection moulding method that shaping efficiency is high.
For realizing above-mentioned purpose, the present invention has adopted following technical scheme: the patrix of mould is the fiberglass soft mode, counterdie is the fiberglass die, earlier resin is injected by injecting systems, and certain pressure is arranged when injecting owing to resin, soft mode is expanded, after quantitatively resin injection is finished, close gum-injecting port, at this moment also have the subregion not soak into, mode by vacuum decompression makes resin flow unnecessary in the die cavity to the unfilled part of edge then, thereby makes resin be full of whole die cavity.The concrete operations step is as follows:
1) cleaning mold is clean;
2) be coated with high efficient demoulding agent;
3) incite somebody to action the even brushing gel coat of die surface up and down;
4) lay glass fibre 15 between die 14 and soft mode 11;
5) die edge is pre-fixed earlier, adopt decompressor in the formation system 1 then, mould is closed sternly by fixedly vacuum loop 5 decompressions of relief line 13 with clip;
6) adopt vacuum plant in the formation system 1 by relief line 3 with 6 decompressions of forming vacuum loop, vacuum by etc. stream ditch 7 be delivered to die cavity, in die cavity, form negative pressure, with fiber 15 compactings;
7) consumption of calculating resin, with the injector in the formation system 1 resin is passed through resin injection pipeline 9 in the middle of injection port 10 injection die cavitys, injection along with resin, air in the middle of the die cavity is driven out of, because the pressure of resin makes soft mode 11 expand, so when notes were over, periphery was not filled;
8) airtight injection port 10, the decompression of the periphery of die cavity, resin just flows to unfilled part, and till filling up fully, along with resin enters not filling part, the patrix of expansion returns to original state gradually;
9) press pressurize to products solidifying with high vacuum, high vacuum presses to-0.2 ~-0.3MPa;
10) vacuum with the forming vacuum loop releases, and is blown into compressed air, makes upper die and lower die separately, and product is taken off;
11) finishing of product.
The mould of this technology is divided into patrix 11 and counterdie 14, and patrix is a soft mode, and counterdie is a die, or patrix is die, and counterdie is a soft mode, existing soft mode and die has been carried out following design:
1) to the design of soft mode
(1) soft mode die cavity
The soft mode die cavity expands along with the injection of resin because softer, treat that resin has been annotated after, just filling up die cavity fully after the decompression of forming vacuum loop, the die cavity of expansion is with regard to reinstatement.If die cavity hardness is too low, because that patrix expands is too big, filling part is not greater than filling part, in this case, the decompression of forming vacuum loop, the die cavity of filling part does not descend, thereby compressed fiberglass hinders resin flows, has just produced unfilled phenomenon.In general, miscellaneous goods patrix die cavity thickness is 3-4mm, and big product is 5-6mm, and promptly die cavity thickness is 3-6mm.
(2) injection port 10
There is injection port in the centre of patrix 11, and the product that area is bigger then needs to be provided with many places.
(3) outer part
In order to keep the fixedly air-tightness of vacuum loop of moulding loop and mould, in order to prevent die deformation, peripheral part all adopts timber or steel to strengthen simultaneously.
(4) the forming vacuum mouth 3
Be set as type vacuum port 1-2 place on the patrix, use internal diameter 10mm, the metal tube of length 50mm or plastic flexible pipe are installed after the fine finishining.
2) to the design of die
(5) die spatial portion
The common die that counterdie 14 is used for RTM, product adopt timber or steel to strengthen when big, stacked thickness 6-8mm, large product thickness are 10mm, and promptly stacked thickness is 6-10mm.
(6) neighboring
The neighboring is the part of die cavity, prolongs about 20-30mm than product end surface, because lay glass fibre 15 on the counterdie leaves unnecessary part usually, the neighboring is exactly the place of dress more than glass fibre.
(7) die peripheral part
From die cavity toward around prolong part about 200mm, form mould fixedly vacuum loop 5 and forming vacuum loop 6.In order to keep the air-tightness of two cover vacuum loops, prevent die deformation, strengthen with timber or steel.
(8) stream ditch 7 such as
Width 15-20mm, height 0.2mm, be arranged between moulding loop and the neighboring, inject when reducing pressure behind the resin, bubble and unnecessary resin by etc. the stream ditch be drawn out of, highly too big words, because a large amount of resins are drawn out of, be easy to generate and do the district, but too little words can not be extracted bubble and unnecessary resin out again fully, cause bubble too much, product thickness is inhomogeneous.
(9) the forming vacuum loop 6
After resin injection finishes, with low vacuum resin is directed to the periphery of sky die cavity, attracts resin complete filling die cavity with high vacuum again, after this, bubble and residual resin attracted to the forming vacuum loop by pipeline, and this loop is arranged on the last end face that arrives of resin that enters from injection port.
Mould is a rectangle, and minor face is slower than the arrival of long limit resin, so will be arranged on the short leg periphery to the loop; If mould is circular or square, the resin of injection almost arrives end face simultaneously, and at this moment, it is all entirely that the loop just should be arranged on spatial portion, and the loop is done in echelon or be semicircle, and the corner angle at each angle are removed camber.
(10) the fixing vacuum port of mould
Fixing vacuum loop on mould is provided with the 1-2 place, uses internal diameter 10mm, and the metal tube about length 100mm is installed.
(11) the fixing vacuum packing ring 4 of mould
Form fixedly vacuum loop of mould with this packing ring, mould fixedly vacuum loop needs air-tightness, and gasket materials is used independent foaminess sponge rubber.The width 15mm of section, height 30mm.
(12) the fixing vacuum loop 5 of mould
Around mould fixedly vacuum loop 5 is set all, its section width is 100mm, high 5mm.
Whole technical process is controlled by formation system and is implemented, formation system is made up of two parts: the one, and vacuum plant is by relief line 2,3, the 13 control moulding vacuum loops and the fixing vacuums of vacuum loop are provided with vacuum meter 16 and observe vacuum on relief line; The 2nd, injection device injects die cavity by it with resin.
The present invention adopts above method, has the following advantages:
1) improves production environment;
2) product quality does not rely on labourer's qualification;
3) mould takes, the installation cost cost is low;
4) more cheap than other mechanical-moulded method;
5) the bigger product of energy shaping area;
6) operation of mould is fairly simple;
7) thin-wall product of energy molding thickness about 1mm;
8) can realize that the product surfaces externally and internally is smooth.
Description of drawings
Fig. 1 is a process chart
Fig. 2 is formation system figure
Fig. 3 is a die drawing
Fig. 4 is the forming vacuum loop diagram, and wherein a is the setting in the forming vacuum loop of rectangular die, and b is the setting in the forming vacuum loop of square mould
The 1st, formation system, the 2nd, relief pipe, the 3rd, moulding relief line, the 4th, mould retaining washer, the 5th, fixing vacuum loop, the 6th, forming vacuum loop, the 7th, Deng stream ditch, the 8th, product, the 9th, resin injection pipeline, the 10th, injection port, the 11st, patrix, the 12nd, resin storagetank, the 13rd, fixing vacuum line, the 14th, counterdie, the 15th, glass fibre, the 16th, vacuum meter.
The specific embodiment
Embodiment one:
Patrix is the fiberglass soft mode, and counterdie is the fiberglass die, and by pipeline 10 injecting resins, pipeline 3 vacuumizes.The method is suitable for height less than 1.5 meters product.
Concrete technological process is: at first that the die surface cleaning is clean, be coated with 5-6 all over high efficient demoulding agent, and be 15 minutes each blanking time; To the even brushing gel coat of die surface up and down, after treating that gel coat solidifies, thickness lay glass fibre according to product, and glass fibre is taped against beyond the die joint, die edge is pre-fixed with clamp, be decompressed to mould fixedly more than vacuum loop-0.7MPa by the RIV shaped device, thus fixed mould better.Decompression forming vacuum loop to-0.2 ~-0.3MPa, with the fiber compacting, vacuum with the forming vacuum loop releases then, inject by shaped device, injection speed is controlled at 1 ~ 2L/ branch, if resin flows is bad, can press with low vacuum (0.03 ~-0.07MPa) decompression on one side, on one side injecting resin.After resin injection finishes, again with low vacuum press (0.03 ~-0.07MPa) reduced vacuum loop about 10 minutes, again with high vacuum press (0.2 ~-0.3MPa) be decompressed to resin and be full of whole die cavity fully, after finishing, filling press pressurize to products solidifying with high vacuum, the vacuum in forming vacuum loop is released, be blown into air from the forming vacuum loop, upper die and lower die separately, product is taken off, repaired at last.
Embodiment two:
Patrix is the fiberglass die, and counterdie is the fiberglass soft mode, and resin is injected by pipeline 3, vacuumizes by 10 pairs of die cavitys of pipeline, and the method is to be suitable for highly to surpass 1.5 meters product.Specific implementation process is with embodiment one.
Embodiment three:
Patrix is the fiberglass die, and counterdie is the fiberglass soft mode, injects from a flank side surface, and at this moment the width along die cavity injects equably, attract from the another side side again, this method to fill up the time long, suitable product needed is pleased both parties or complex-shaped formed product.Specific implementation process is with embodiment one.
Claims (2)
1, a kind of vacuum auxiliary resin penetration process for composite material is characterized in that being finished by the following step:
1) cleaning mold is clean;
2) be coated with high efficient demoulding agent;
3) incite somebody to action the even brushing gel coat of die surface up and down;
4) lay glass fibre (15) between die (14) and soft mode (11);
5) die edge is pre-fixed earlier with clip, adopt then in the formation system (1) decompressor by relief line (13) fixedly vacuum loop (5) reduce pressure, mould is closed sternly;
6) adopt vacuum plant in the formation system (1) by relief line (3) with forming vacuum loop (6) decompression, very by etc. stream ditch (7) be delivered to die cavity, in die cavity, form negative pressure, with fiber (15) compacting;
7) consumption of calculating resin, with the injector in the formation system (1) resin is passed through resin injection pipeline (9) in the middle of injection port (10) injection die cavity, injection along with resin, air in the middle of the die cavity is driven out of, because the pressure of resin makes soft mode (11) expand, so when notes were over, periphery was not filled;
8) airtight injection port (10), the decompression of the periphery of die cavity, resin just flows to unfilled part, and till filling up fully, along with resin enters not filling part, the patrix of expansion returns to original state gradually;
9) press pressurize to products solidifying with high vacuum, high vacuum presses to-0.2 ~-0.3MPa;
10) vacuum with the forming vacuum loop releases, and is blown into compressed air from the forming vacuum loop, makes upper die and lower die separately, and product is taken off;
11) finishing of product.
2, a kind of mould of realizing claim 1 is characterized in that being divided into upper die and lower die, and patrix is a soft mode, and counterdie is a die, or patrix is die, and counterdie is a soft mode, and concrete structure is as follows:
There is injection port (10) in the centre of patrix (11), and the die cavity thickness of patrix is 3～6mm, is set as type vacuum port (3) 1～2 places on the patrix, uses internal diameter 10mm, the metal pipe type plastic flexible pipe of length 50mm;
The stacked thickness of counterdie is 6～10mm, the neighboring prolongs 20～30mm than product end surface, lay glass fibre (15) on the counterdie, form mould fixedly vacuum loop (5) and forming vacuum loop (6) from die cavity toward the part that prolongs 200mm on every side, stream ditch (7) width 15～20mm such as between forming vacuum loop (6) and neighboring, establish, high 0.02mm; Fixedly on the vacuum loop (5) fixedly vacuum port of 1～2 place's mould is set at mould, use internal diameter 10mm, the metal tube of length 100mm, mould is the width 15mm of vacuum packing ring (4) section fixedly, height 30mm, around mould fixedly vacuum loop (5) is set all, its section width is 100mm, high 5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510000081 CN1631659A (en) | 2005-01-07 | 2005-01-07 | Vacuum auxiliary resin penetration process for composite material and mould therefor |
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| CN 200510000081 CN1631659A (en) | 2005-01-07 | 2005-01-07 | Vacuum auxiliary resin penetration process for composite material and mould therefor |
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| CN101977747A (en) * | 2008-01-18 | 2011-02-16 | Gkn航天服务有限公司 | Semi-rigid tool |
| CN101300125B (en) * | 2005-11-14 | 2011-05-18 | Lm玻璃纤维有限公司 | Production of laminate by resin injection |
| CN102112296A (en) * | 2008-07-29 | 2011-06-29 | 空中客车操作有限公司 | Method of manufacturing a composite element |
| CN102179942A (en) * | 2010-12-13 | 2011-09-14 | 中国航空工业集团公司北京航空材料研究院 | Liquid forming method of composite material for closed die built-in resin flow distributor |
| CN102248685A (en) * | 2011-07-01 | 2011-11-23 | 东莞杰腾造船有限公司 | Forming method of glass fiber reinforced plastic (GFRP) |
| CN102312356A (en) * | 2010-07-09 | 2012-01-11 | 西门子公司 | Utilize fluid to soak the apparatus and method of fiber |
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| CN104786521A (en) * | 2015-03-31 | 2015-07-22 | 中国人民解放军国防科学技术大学 | Forming device and forming method for polymer matrix composite material |
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| CN110719841A (en) * | 2017-06-09 | 2020-01-21 | 日产自动车株式会社 | Method for forming composite material |
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| CN101300125B (en) * | 2005-11-14 | 2011-05-18 | Lm玻璃纤维有限公司 | Production of laminate by resin injection |
| CN101977747A (en) * | 2008-01-18 | 2011-02-16 | Gkn航天服务有限公司 | Semi-rigid tool |
| CN102112296A (en) * | 2008-07-29 | 2011-06-29 | 空中客车操作有限公司 | Method of manufacturing a composite element |
| CN101954743B (en) * | 2009-07-14 | 2013-04-10 | 上海玻璃钢研究院有限公司 | Vacuum circulating perfusion system and perfusion method |
| CN102312356A (en) * | 2010-07-09 | 2012-01-11 | 西门子公司 | Utilize fluid to soak the apparatus and method of fiber |
| CN102463679A (en) * | 2010-11-10 | 2012-05-23 | 江苏源盛复合材料技术股份有限公司 | Preparation method of spacing rod frame used for power transmission line |
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| CN102248685A (en) * | 2011-07-01 | 2011-11-23 | 东莞杰腾造船有限公司 | Forming method of glass fiber reinforced plastic (GFRP) |
| CN104736312A (en) * | 2012-10-29 | 2015-06-24 | 迪芬巴赫机械工程有限公司 | Mold, control means, method and installation for producing a preferably fiber-reinforced plastic component |
| CN103817832B (en) * | 2013-09-26 | 2016-08-24 | 上海飞机制造有限公司 | Mould and use the method that this mould carries out vacuum infusion molding |
| 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 |
| CN104242220B (en) * | 2014-09-30 | 2017-07-07 | 深圳市惠程电气股份有限公司 | A kind of cable intermediate joint protection box and preparation method thereof |
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| CN108749033A (en) * | 2018-08-14 | 2018-11-06 | 北京航天新风机械设备有限责任公司 | A kind of precast body reinforcing plate class universal vacuum mould closing mould |
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| CN109228401A (en) * | 2018-08-24 | 2019-01-18 | 江苏亨睿碳纤维科技有限公司 | Composite material injection molding technique |
| CN109955504B (en) * | 2019-04-04 | 2021-04-13 | 北京卫星制造厂有限公司 | Shape-following preparation mold and preparation method for three-dimensional porous heat-proof structure |
| CN109955504A (en) * | 2019-04-04 | 2019-07-02 | 北京卫星制造厂有限公司 | A kind of three-dimensional porous thermal protection struc ture prepares mold and preparation method with the shape |
| CN111688238A (en) * | 2020-05-27 | 2020-09-22 | 长春三友智造科技发展有限公司 | Method for forming thermosetting polymer fiber composite material part |
| CN112536946A (en) * | 2020-11-20 | 2021-03-23 | 上海复合材料科技有限公司 | Composite material conical section forming die pressurized by using soft die |
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