CN104044277A - Vacuum assisted resin transfer molding integral-forming technology of composite material fuel-tank - Google Patents
Vacuum assisted resin transfer molding integral-forming technology of composite material fuel-tank Download PDFInfo
- Publication number
- CN104044277A CN104044277A CN201410180511.6A CN201410180511A CN104044277A CN 104044277 A CN104044277 A CN 104044277A CN 201410180511 A CN201410180511 A CN 201410180511A CN 104044277 A CN104044277 A CN 104044277A
- Authority
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- China
- Prior art keywords
- core
- fuel tank
- water
- vacuum
- resin
- Prior art date
- 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.)
- Granted
Links
- 239000002828 fuel tank Substances 0.000 title claims abstract description 87
- 229920005989 resin Polymers 0.000 title claims abstract description 45
- 239000011347 resin Substances 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 238000001721 transfer moulding Methods 0.000 title claims abstract description 14
- 238000005516 engineering process Methods 0.000 title abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000002360 preparation method Methods 0.000 claims abstract description 16
- 230000003014 reinforcing Effects 0.000 claims abstract description 6
- 239000011162 core material Substances 0.000 claims description 108
- 238000000465 moulding Methods 0.000 claims description 21
- 239000003822 epoxy resin Substances 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 15
- 229920000647 polyepoxide Polymers 0.000 claims description 15
- 239000003921 oil Substances 0.000 claims description 12
- 239000011160 polymer matrix composite Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 10
- 239000004449 solid propellant Substances 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 206010018987 Haemorrhage Diseases 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000000740 bleeding Effects 0.000 claims description 6
- 231100000319 bleeding Toxicity 0.000 claims description 6
- 239000000284 extract Substances 0.000 claims description 6
- 238000005755 formation reaction Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 229920003081 Povidone K 30 Polymers 0.000 claims description 3
- 239000006004 Quartz sand Substances 0.000 claims description 3
- 230000001808 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound 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- 238000004166 bioassay Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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[C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000000977 initiatory Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000009745 resin transfer moulding Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- B29C70/46—Shaping 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
- B29C70/48—Shaping 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
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
- B29C33/3857—Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts
- B29C33/3892—Preparation of the model, e.g. by assembling parts
Abstract
The invention discloses a vacuum assisted resin transfer molding integral-forming technology of a composite material fuel-tank. A novel structural material fuel-tank is provided. Structural weight of a present fuel tank and vehicle noise level can be reduced effectively, and the novel structural material fuel-tank has characteristics of impact damage resistance, corrosion resistance and the like. Meanwhile, forming process cycle of the fuel tank can be greatly shortened, and production efficiency of the fuel tank can be raised. The technology is realized by the following technical scheme: core three-dimensional modeling; core forming-die manufacturing; soluble (fusible) core manufacturing; die preparation; laying and shaping of a reinforcing material; die locking; making of a resin solution; resin injection; resin curing; demoulding; core dissolution (fusing); and composite material product finishing. By the technology, production efficiency is high; demoulding is convenient; and cost is low.
Description
Technical field
The present invention relates to a kind of vacuum-assisted resin transfer molding (Vacuum Assisted Resin Transfer Molding of composite fuel tank, be called for short VARTM) integral forming technique, relate in particular to and utilize vacuum-assisted resin transfer moulding technology and solvable (melting) property core to carry out the technique of composite element global formation.
Background technology
Fuel tank, as the storage device of car, heavy truck, Engines Used In Special Vehicle oil, is widely used in various model transportation and communications, is the important component part of transportation and communication.Realized gradually plastic at car field fuel tank at present, the application of plastic fuel tank has reduced the weight of car to a certain extent, and still, plastic fuel tank intensity is relatively low, is easy to breakage while being subject to external force, easily causes fuel oil outflow, even initiation fire; The fuel tank of heavy truck, special vehicle mainly adopts high-strength steel sheet to be welded, and welded sheet steel tank exists following problem: 1 forming technology complexity, product design and poor dimensional precision; 2 composition parts are many, and machined and butt welding process complexity, waste time and energy; 3 weight are large, and cost is high; 4 vibration noises are large, poor corrosion resistance etc.
Summary of the invention
The object of the present invention is to provide a kind of moulding new technology of novel resin-based composite material fuel tank, prepared polymer matrix composites fuel tank adopts a kind of low cost, the auxiliary VARTM technique integral shaping method of high efficiency solvable (melting) sexual type core.
The present invention adopts following technical scheme to realize:
A vacuum-assisted resin transfer molding integral forming technique for composite fuel tank, comprises the steps:
(1), core three-dimensional modeling: make core drawing according to tank design size, recycling 3 d modeling software is set up core threedimensional model;
(2), the preparation of core model: prepare core model according to the threedimensional model of core, how preparative core model this area possesses several different methods;
(3), the preparation of water-soluble core: first, turn over manufacturing mold core mould (how to turn over manufacturing mold core mould this area and possess several different methods) according to core model; Afterwards, taking weight ratio as the PVP K30 of 3: 15: 10, quartz sand, deionized water is raw material configuration Water-Soluble Core mold materials; Finally, core moulding die surface is smeared demoulding wax, and pours the Water-Soluble Core mold materials of configuration in core moulding mould tamping, puts into baking oven and dries at 80 DEG C, and reverse mould after moulding, prepares water-soluble core;
Or, the preparation of meltability core: first, turn over manufacturing mold core mould according to core model; Afterwards, select the alloy material of fusing point in 100 DEG C, after fusing, utilize the moulding of core moulding die casting, obtain meltability core;
(4), mould prepares: taking water-soluble core as internal mold, in water-soluble core, pre-buried fuel tank is strengthened dividing plate, and sealing of hole processing is carried out in water-soluble core surface with water-soluble putty;
Or taking meltability core as internal mold, in meltability core, pre-buried fuel tank is strengthened dividing plate, and meltability whose surfaces is carried out to grinding process;
(5), the laying of reinforcing material and sizing: be coated multi-layer fiber reinforcing material according to fuel tank thickness at water-soluble core or meltability whose surfaces, in laying every layer of fibre reinforced materials, spray setting agent, fibre reinforced materials is carried out to heat treatment, make perform manufacturing;
(6), vacuum bag film is coated: lay release cloth, barrier film and flow-guiding screen outward at perform manufacturing, lay helix tube, gum-injecting port and bleeding point in relevant position according to designing requirement on flow-guiding screen surface, finally wrapped up with vacuum bag, formed the die cavity of sealing;
(7), VARTM formation system connects: bleeding point is connected with resin container with vavuum pump by pitch tube respectively with gum-injecting port, and in the middle of each pipeline, control valve is set, form respectively extraction valve and rubber injecting valve, form extract system and injection system;
(8), injection system pressurize: connect a vacuum meter on gum-injecting port, and sealing die cavity is evacuated to 5～10mbar, close extraction valve and vavuum pump, vacuum pressurize, observe vacuum meter vacuum decline in 15 to 30min and be no more than 3mbar, show that this system air-tightness is good, reach VARTM injection requirement;
(9), the configuration of resin adhesive liquid: utilize injector to mix upper latitude epoxy resin and curing agent in the ratios of 100: 30, make epoxy resin adhesive liquid, and be injected in resin container, stand-by;
(10), resin injection: open injector, vavuum pump, and extraction valve, rubber injecting valve, resin system is filled in vacuum forming mould and infiltrates fibre reinforced materials, until resin is full of die cavity, perform manufacturing is all infiltrated, and closes rubber injecting valve and injector;
(11), resin solidification: stop, after perfusion, continuing to vacuumize pressurize, until resin system starts gel and solidifies, close vavuum pump and extraction valve;
(12) demoulding: reach 15 when above until resin surface hardness Barcol, pull all objects outside solid fuel tank, take out solid fuel tank product;
(13), water-soluble core stripping: use hot water injection, water-soluble core is dissolved, until all strippings from solid fuel tank product of water-soluble core material make composite fuel tank product;
Or meltability core melts out: solid fuel tank product is placed in to the oven heat of 105 DEG C, until meltability core all melts, pours out from solid fuel tank product, obtain composite fuel tank product;
(14), the installation of fuel tank coupling: the position of laying pouring orifice, fuel outlet, oil pick-up tube inserts at oil tank utilizes annular sanding apparatus to be polished a loop concave, and the connecting ring of pouring orifice, fuel outlet, tube connector inserts is embedded to this loop concave, and paste reinforcement at loop concave periphery with carbon-fibre reinforced epoxy resin material;
(15), the finishing of composite fuel tank product: the composite fuel tank product obtaining is repaired, detected, after quality problems, obtain the polymer matrix composites fuel tank of VARTM global formation.
The material of main part of the present invention using polymer matrix composites as fuel tank, adopt VARTM integral forming technique to be applicable to the preparation of various hollow-core construction fuel tank parts, for example prepare the vehicle power oil fuel tanks such as car, heavy truck, special vehicle, the product of this technological forming has the advantages such as quality is light, intensity is high, precision is good, rigidity is large, good looking appearance.The machining accuracy of solvable in its technique (melting) sexual type core is high, and the cycle is short, easy to process quick; Its hollow structural component core internal mold has the feature of the instant or heating and melting of heat water, the therefore demoulding and easy to use.
There is following advantage: 1, lightweight, can make oil tank of vehicle loss of weight 25%～35%; 2, can give the good sound insulation of vehicle, noise reduction, effectiveness in vibration suppression; 3, good seal performance, anti-seepage effect obviously improves; 4, shock resistance destruction and decay resistance improve greatly; 5, there is the advantages such as size is accurate, rigidity large, good looking appearance; 6, the processing and forming cycle shortens greatly; 7, be convenient to installation and maintenance; 8, use this process to carry out processing and forming to polymer matrix composites fuel tank member, efficiency is high, and cost is low, the input of greatly having saved equipment simultaneously.
Brief description of the drawings
Fig. 1 is vacuum-assisted resin transfer molding (VARTM) the integral forming technique process schematic diagram of polymer matrix composites fuel tank of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated.
Taking the 3rd externally mounted fuel tank of certain vehicle as example, introduce vacuum-assisted resin transfer molding (VARTM) integral forming technique of polymer matrix composites fuel tank of the present invention.
embodiment 1
Comprise the steps:
1, core three-dimensional modeling: make core drawing according to tank design size, recycling 3 d modeling software UG, ProE, Solid works, CATIA etc. set up the threedimensional model of fuel tank core, and utilize software to carry function threedimensional model is cut, choose 10 cross sections representative in oil tank type core model, and the size of 10 cross section surroundings is reduced, every side reduction 30mm, and by the sectional view file after reduction, printout forms drawing.
2, the preparation of the 3rd externally mounted fuel tank core model: the CAD cross section drawing of core of setting up according to three-dimensional modeling, produce the fiberglass dividing plate of 10 diverse locations, and all dividing plates are connected and are fixed together with location strings in order with angle iron, form framework; And between dividing plate, pour polyurethane foam material into, and after foaming completely, repair according to dividing plate size, stick with paste frp layers, the about 5mm of thickness at polyurethane foam surface epoxy resin LT-5078, twin shaft to E-BX800 and three axial E-BX1200 hands subsequently; After frp layer solidifies, cleaning glass steel layer, and apply substitute materials for wood (can machined resin plate) on frp layer, limit coated side is firmly patted and is made generation wood closely knit, the about 30mm of thickness; After in generation,, wood layer solidified, prepared core model is moved on numerically controlled lathe, to carrying out retrofit for die model core, obtain the 3rd externally mounted fuel tank core model.
3, the 3rd externally mounted fuel tank water-soluble core preparation: first, the preparation of fuel tank core mould: taking the 3rd externally mounted fuel tank core model as master mold, first utilize the gloomy epoxy resin RIM935/RIMH937 resin mould of the Chinese and twin shaft to turn over water-soluble core model fiberglass mould processed to craft such as E-BX800 and three axial cloth E-BX1200, the about 15mm of mould glass steel layer thickness, after mould glass steel layer solidifies, the demoulding, obtains the half of the 3rd externally mounted fuel tank core moulding mould; Prepare second half of the 3rd externally mounted fuel tank core moulding mould by identical method again, both be the 3rd complete externally mounted fuel tank core moulding mould after fastening.
Afterwards, the compression stress producing according to VARTM technique, taking PVP K30, quartz sand, deionized water as raw material, configures and can meet the Water-Soluble Core mold materials that briquetting pressure requires.
Finally, smear demoulding wax at the 3rd externally mounted fuel tank core moulding die surface, and the Water-Soluble Core mold materials of configuration is poured into tamping in the 3rd externally mounted fuel tank core moulding mould, put into baking oven and dry 72h at 80 DEG C, reverse mould after moulding, prepares the 3rd externally mounted fuel tank water-soluble core.
4, mould is prepared: pre-buried reinforcement dividing plate on water-soluble core relevant position, and sealing of hole processing is carried out in the 3rd externally mounted fuel tank water-soluble core surface with water-soluble putty.
5, the laying of reinforcing material and sizing: taking the 3rd externally mounted fuel tank water-soluble core as internal mold, cover according to design laying paving the 200g/m that 4mm is thick in whose surfaces
2t300 carbon fiber woven roving, in the time laying fibre reinforced materials, 1 layer of carbon fibre reinforcement of every laying will spray pre-setting agent, overlay again the effect that carbon fiber woven roving that 2mm is thick plays reinforcement at pre-buried fuel tank accessory position place, after having laid, obtain the 3rd externally mounted fuel tank perform manufacturing.
6. vacuum bag film is coated: lay in order one deck release cloth, barrier film and flow-guiding screen outward at perform manufacturing, suitably spray pre-setting agent in the time that release cloth, barrier film and flow-guiding screen are laid, prevent that its position from changing in forming process.Lay helix tube, 4 gum-injecting ports and 4 exhaust outlets on flow-guiding screen surface according to designing requirement in relevant position, and use sealing joint strip to guarantee that its position fixes.Use vacuum bag film that perform manufacturing, barrier film, release cloth, flow-guiding screen, helix tube, gum-injecting port and exhaust outlet are all wrapped up wherein, and use sealing joint strip sealing, form sealing die cavity.
7, VARTM formation system connects: perforate on vacuum bag film, and 4 exhaust outlets (bleeding point) are connected respectively on vacuum buffer tank by pitch tube, and vacuum buffer tank is connected with 2XZ-4 vavuum pump, form extract system.To be connected with resin container respectively by pitch tube through 4 gum-injecting ports of design, and resin container is connected with PR70v RTM injector, form injection system.Each branch road of extract system and injection system is opened closure and is formed rubber injecting valve and extraction valve by a locking pliers control respectively, and locking pliers clamps branch road and cuts out, and locking pliers unclamps branch road and is communicated with.
8, injecting systems pressurize: the branch road of closing injecting systems, open each branch road of vavuum pump, vacuum buffer tank and extract system, and on injected rubber hose, connect a digital display vacuum meter, in the time that vacuum is evacuated to 5～10mbar, close the branch road of bleeding, vacuum pressurize 15～30min, vacuum decline is no more than 3mbar proves that this system air-tightness is good, reaches VARTM injection requirement.
9, the configuration of resin adhesive liquid: utilize PR70v RTM injector to mix upper latitude epoxy resin (2511A) and curing agent (2511B) in the ratios of 100: 30, make epoxy resin adhesive liquid, and be injected in resin container, stand-by.
10, resin injection: open vavuum pump and continue the 3rd externally mounted fuel tank mould of sealing to vacuumize, make its vacuum reach 5～10mbar.After ready, open successively the injecting glue valve of 4 injecting glue pipelines by design sequence, SW 2511A/B epoxy resin resin system is injected to the 3rd externally mounted fuel tank vacuum seal mould, until be full of die cavity, and keep a period of time, until fibre reinforced materials is all infiltrated, close injecting glue valve and injector.
11, resin solidification: stop after injecting glue, continue to vacuumize pressurize, until resin system starts gel and solidifies, with locking pliers by exhaust tube clamp (closing extraction valve), die set for fuel tank of vehicles tool is put into baking oven, slowly mold temperature is increased to 80 DEG C, solidify 10h.
12, the demoulding: material surface hardness Barcol to be composite reaches 15 when above, remove injection system and the extract system of composite tank surface, pull vacuum bag, flow-guiding screen, release cloth and the barrier film in composite fuel tank member outside, the composite fuel tank product of taking-up with water-soluble core, detects and has or not quality problems.
13, the water-soluble core stripping of the 3rd externally mounted fuel tank: use the hot water injection of the 80 DEG C composite fuel tank product with water-soluble core from reservoir port, until water-soluble core is all water-soluble, poured out by the position such as pouring orifice, fuel outlet reserved in tank body of oil tank, obtain composite the 3rd externally mounted fuel tank product.
14, the installation of fuel tank coupling: the position of laying the fuel tank inserts such as pouring orifice, fuel outlet, oil pick-up tube on tank body of oil tank utilizes annular sanding apparatus to be polished a loop concave, and the connecting ring of the inserts such as the oil filling orifice of fuel tank separately adding, fuel outlet, tube connector is embedded to this loop concave, and paste reinforcement at loop concave periphery with carbon-fibre reinforced epoxy resin material.
15, composite fuel tank product finishing: the polymer matrix composites fuel tank to preparation is repaired, remove the burr of fuel tank product, detection has or not the quality problems such as starved, pore, after the assay was approved, uniformly spray one deck SW 2511A/B epoxy resin at tank surface, after epoxy resin cure, obtain polymer matrix composites the 3rd externally mounted fuel tank product of any surface finish.
embodiment 2
The difference of the present embodiment and embodiment 1 is: water-soluble core is replaced with to meltability core.Specific as follows:
In step 3, the preparation of meltability core: first, turn over manufacturing mold core mould according to core model, with embodiment 1; Afterwards, select the alloy material of fusing point in 100 DEG C (if fusing point is Bi, Sn, the Cd ternary alloy three-partalloy of 102.5 DEG C, weight proportion is 54: 26: 20) be raw material, configure the low melting point core material that can meet forming requirements, meltability alloy material is melted, utilize the cast molding of meltability core casting mould, and meltability whose surfaces is carried out to grinding process (step 4).
In step 13, the 3rd externally mounted fuel tank meltability core melts out: the composite fuel tank product with meltability core is placed in to the oven heat of 105 DEG C, until meltability core all melts, pours out, obtain composite the 3rd externally mounted fuel tank product.
All the other steps are with described in embodiment 1.
From above-mentioned concrete embodiment, moulding process of the present invention is suitable for the moulding of various vehicles hollow-core construction composite fuel tank parts completely.Technical scheme of the present invention is applied to the preparation process of polymer matrix composites fuel tank member, can significantly improve the production efficiency of fuel tank member, Forming Quality is even, size is accurate, the bright and clean high strength attractive in appearance of appearance, polymer matrix composites fuel tank member cheaply.
Claims (6)
1. a vacuum-assisted resin transfer molding integral forming technique for composite fuel tank, is characterized in that: comprise the steps:
(1), core three-dimensional modeling: make core drawing according to tank design size, recycling 3 d modeling software is set up core threedimensional model;
(2), the preparation of core model: prepare core model according to the threedimensional model of core;
(3), the preparation of water-soluble core: first, turn over manufacturing mold core mould according to core model; Afterwards, taking weight ratio as the PVP K30 of 3: 15: 10, quartz sand, deionized water is raw material configuration Water-Soluble Core mold materials; Finally, core moulding die surface is smeared demoulding wax, and pours the Water-Soluble Core mold materials of configuration in core moulding mould tamping, puts into baking oven and dries at 80 DEG C, and reverse mould after moulding, prepares water-soluble core;
Or, the preparation of meltability core: first, turn over manufacturing mold core mould according to core model; Afterwards, select the alloy material of fusing point in 100 DEG C, after fusing, utilize the moulding of core moulding die casting, obtain meltability core;
(4), mould prepares: taking water-soluble core as internal mold, in water-soluble core, pre-buried fuel tank is strengthened dividing plate, and sealing of hole processing is carried out in water-soluble core surface with water-soluble putty;
Or taking meltability core as internal mold, in meltability core, pre-buried fuel tank is strengthened dividing plate, and meltability whose surfaces is carried out to grinding process;
(5), the laying of reinforcing material and sizing: be coated multi-layer fiber reinforcing material according to fuel tank thickness at water-soluble core or meltability whose surfaces, in laying every layer of fibre reinforced materials, spray setting agent, fibre reinforced materials is carried out to heat treatment, make perform manufacturing;
(6), vacuum bag film is coated: lay release cloth, barrier film and flow-guiding screen outward at perform manufacturing, lay helix tube, gum-injecting port and bleeding point in relevant position according to designing requirement on flow-guiding screen surface, finally wrapped up with vacuum bag, formed the die cavity of sealing;
(7), VARTM formation system connects: bleeding point is connected with resin container with vavuum pump by pitch tube respectively with gum-injecting port, and in the middle of each pipeline, control valve is set, form respectively extraction valve and rubber injecting valve, form extract system and injection system;
(8), injection system pressurize: connect a vacuum meter on gum-injecting port, and sealing die cavity is evacuated to 5～10mbar, close extraction valve and vavuum pump, vacuum pressurize, observe vacuum meter vacuum decline in 15 to 30min and be no more than 3mbar, show that this system air-tightness is good, reach VARTM injection requirement;
(9), the configuration of resin adhesive liquid: utilize injector to mix upper latitude epoxy resin and curing agent in the ratios of 100: 30, make epoxy resin adhesive liquid, and be injected in resin container, stand-by;
(10), resin injection: open injector, vavuum pump, and extraction valve, rubber injecting valve, resin system is filled in vacuum forming mould and infiltrates fibre reinforced materials, until resin is full of die cavity, perform manufacturing is all infiltrated, and closes rubber injecting valve and injector;
(11), resin solidification: stop, after perfusion, continuing to vacuumize pressurize, until resin system starts gel and solidifies, close vavuum pump and extraction valve;
(12) demoulding: reach 15 when above until resin surface hardness Barcol, pull all objects outside solid fuel tank, take out solid fuel tank product;
(13), water-soluble core stripping: use hot water injection, water-soluble core is dissolved, until all strippings from solid fuel tank product of water-soluble core material make composite fuel tank product;
Or meltability core melts out: solid fuel tank product is placed in to the oven heat of 105 DEG C, until meltability core all melts, pours out from solid fuel tank product, obtain composite fuel tank product;
(14), the installation of fuel tank coupling: the position of laying pouring orifice, fuel outlet, oil pick-up tube inserts at oil tank utilizes annular sanding apparatus to be polished a loop concave, and the connecting ring of pouring orifice, fuel outlet, tube connector inserts is embedded to this loop concave, and paste reinforcement at loop concave periphery with carbon-fibre reinforced epoxy resin material;
(15), the finishing of composite fuel tank product: the composite fuel tank product obtaining is repaired, detected, after quality problems, obtain the polymer matrix composites fuel tank of VARTM global formation.
2. the vacuum-assisted resin transfer molding integral forming technique of composite fuel tank according to claim 1, it is characterized in that: in the preparation of the meltability core of step (3), selection fusing point is Bi, Sn, the Cd ternary alloy three-partalloy of 102.5 DEG C, and weight proportion is 54: 26: 20.
3. the vacuum-assisted resin transfer molding integral forming technique of composite fuel tank according to claim 1 and 2, is characterized in that: the core moulding mould in step (3) utilizes glass-reinforced plastic material preparation, and thickness is 15mm.
4. the vacuum-assisted resin transfer molding integral forming technique of composite fuel tank according to claim 3, is characterized in that: in step (5), described fibre reinforced materials is 200g/m
2t300 carbon fiber woven roving, thickness is 4mm; In pre-buried fuel tank accessory position, place overlays the carbon fiber woven roving that 2mm is thick again.
5. the vacuum-assisted resin transfer molding integral forming technique of composite fuel tank according to claim 4, is characterized in that: in step (11), condition of cure is: 80 DEG C of curing 10h in baking oven.
6. the vacuum-assisted resin transfer molding integral forming technique of composite fuel tank according to claim 5, is characterized in that: in step (14), evenly spray one deck SW 2511A/B epoxy resin at polymer matrix composites tank surface.
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