CN104070687A - Method for forming composite material pipe mold element by pressurizing air bags with assistance of resin film transfer - Google Patents

Method for forming composite material pipe mold element by pressurizing air bags with assistance of resin film transfer Download PDF

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Publication number
CN104070687A
CN104070687A CN201410250380.4A CN201410250380A CN104070687A CN 104070687 A CN104070687 A CN 104070687A CN 201410250380 A CN201410250380 A CN 201410250380A CN 104070687 A CN104070687 A CN 104070687A
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CN
China
Prior art keywords
soft mode
air bag
core soft
resin
mould
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CN201410250380.4A
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Chinese (zh)
Inventor
陈蔚
叶宏军
刘立朋
张晨乾
成理
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中航复合材料有限责任公司
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Priority to CN201410250380.4A priority Critical patent/CN104070687A/en
Publication of CN104070687A publication Critical patent/CN104070687A/en

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    • 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
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2063/00Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00Use of polyesters or derivatives thereof, as moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00Tubular articles

Abstract

The invention belongs to the technical field of manufacture engineering, relates to a manufacture technology method of a high-performance composite material pipe mold element, and particularly relates to a method for forming a composite material pipe mold element by pressurizing air bags with assistance of resin film transfer. According to the invention, a dry state fiber fabric and a thermoset resin adhesive film act as a base of a material, so that the method has the multiple advantages of reducing the manufacture cost obviously, improving the production efficiency effectively, expanding the application range of the manufacture technology extremely and the like. Compared with the traditional prepreg-autoclave technology, the fiber/adhesive film pre-dipping process is saved, so that on one hand, the using of a pre-dipping machine is prevented, and the cost of production equipment is reduced obviously, and on the other hand, the reduction of manufacture links improves the production efficiency effectively; additionally, most importantly, as for manufacture of pipe mold elements with the dry state fiber structure incapable of being treated by the pre-dipping mode, such as fiber 2.5D/3D braided structure, the technology provided by the invention can also be used, and the technology application range is expanded extremely.

Description

A kind of method of gasbag pressurizes assisted resin film transfer formation composite cast part

Technical field

The invention belongs to manufacturing engineering technical field, relate to a kind of method of manufacturing technology of high-performance composite materials cast part, particularly a kind of method of gasbag pressurizes assisted resin film transfer formation composite cast part.

Background technology

Thermosetting resin matrix composite pipe shape product has a large amount of application and application potential in fields such as aerospace vehicle, bullet train, high-performance naval vessel, automobile and special equipments.As " S " type air intake duct of Advanced Aircraft, the air-conditioning flue that all kinds of aircrafts, bullet train cabin are used, the connector that various special equipments are used etc.

Tubular structure product classical production process mainly contains prepreg moulding process and liquid molding two class techniques.Prepreg moulding process is first by fiber and the pre-formed prepreg of moulding resin, then after prepreg paving is in male mold, finally carries out pressurized, heated with the equipment such as autoclave or press and solidify, and makes composite product.Composite liquid condition shaping technology is taking resin transfer moulding (RTM) moulding process as representative, it is laid in fiber soma yarn in former and formpiston module in advance, after the whole mold cavity of closure, under pressure or vacuum action, low viscosity resin is filled with in mold cavity, impregnation of fibers also solidifies and prepares composite product.

Resin molding transfer formation (RFI) technique has prepreg moulding process and liquid molding feature concurrently, it is first pre-manufactured glued membrane paving paving fiber soma yarn thereon again on die face, cover again the medium of distribution rubber flow holes at the dry yarn of fortifying fibre, use autoclave technique, rubber flow holes when pressurized, heated above glued membrane resin-phase, slipper dip fiber also solidifies and molds composite product.In view of its process characteristic, RFI technique has prepreg and RTM two class technological merits concurrently.Compared with prepreg technology, the preparation of intermediary material prepreg has been saved in composite manufacture, and manufacturing cost reduces greatly, and it still can provide larger briquetting pressure by existing autoclave frock simultaneously, produces high performance composite product.Can bring up to more than 60% as the fiber volume fraction of composite, the voidage of composite product is also relatively low.Compared with RTM technology, RFI resin is that intermediate range flows, resin manufacturability requires low, and its preform the same with RTM be still dry state corpus fibrosum, thereby corpus fibrosum can carry out preformed by techniques such as pre-impregnation, fibrage, sewing, manufacture large aerospace complex structural member and reduce process costs with the obvious advantage.

But, adopt RFI technique to manufacture tubulose class composite product report also rarely found.Although RFI technique integrates prepreg moulding process and liquid molding advantage, but still there is its limitation, as resin molding needs first paving in the bottom of mould, be close to profile, must be by autoclave equipment when moulding, when pressurization, from inside outwards flow could impregnation of fibers on surface for resin, thereby is used for manufacturing the composite product of flat-type.And if adopt conventional RFI technological forming tubulose class composite product, still must be confined to formpiston laying operating defect, and then cannot break away from tubulose formpiston frock demoulding difficulty.

Summary of the invention

The present invention is just for the difficult forming of various special-shaped composite tubulose products and a kind of method of gasbag pressurizes assisted resin film transfer formation composite cast part is provided.Technical solution of the present invention is, (one) profile mould is steel combination cavity block, is distributed with gummosis through hole on die face, and each gummosis through hole is through to mould outside from profile in mould, (2) built-in inflation tubulose air bag inner core soft mode, the external diameter of inflation tubulose air bag inner core soft mode and shape are with corresponding by internal diameter and the shape of forming composite cast part, air bag inner core soft mode termination arranges charging connector (three) thermosetting resin and is being prefabricated on the inflation tubulose air bag inner core soft mode that after glued membrane, first paving is being inflated, the dry yarn of charging connector exposed outside (four) fortifying fibre weaves or is stitched into sleeve pipe structure in advance, be enclosed within on the inflation tubulose air bag inner core soft mode that is affixed with thermosetting resin glued membrane, (5) combination cavity block being assemblied in to cover has on the inflation tubulose air bag inner core soft mode of sleeve pipe structure and thermosetting resin glued membrane, (6) carry out composite material solidification according to resin solidification technique, its curing mode is one of following, (1) utilize charging connector place to carry out ftercompction to inflation tubulose air bag inner core soft mode, ensure that inflation tubulose intracapsular pressure is stabilized in the desired pressure of resin solidification technique, use curing oven moulding, (2) abolish the soft mode of inflating tubulose air bag inner core soft mode two ends, jointly whole moulds are sealed with vacuum bag and air bag inner core soft mode, inner core soft mode inner chamber and vacuum bag outside are communicated with, with the moulding of autoclave pressurized, heated, (7) after having solidified, remove combination cavity block, take out inflation tubulose air bag inner core soft mode, obtain composite cast part.

The aperture size of the gummosis through hole distributing on described profile mould is between Φ 0.5mm~Φ 3.0mm, and pitch of holes is between 5mm~50mm.

Described profile mould is at least assembled for being combination cavity block by two parts mould.

The thermosetting resin of described paving on inflation tubulose air bag inner core soft mode is one or more layers.

Described thermosetting resin refers to mylar, epoxy resin or bimaleimide resin.

Described thermosetting resin refers to the modified system of mylar, epoxy resin or bimaleimide resin.

The advantage that the present invention has and beneficial effect, the present invention is non-by prepreg-autoclave technique, but with the RFI technique basis of aircraft industry maturation, than prepreg-autoclave technique, has the following advantages:

(1) the present invention, using dry state fabric and thermosetting resin glued membrane as material foundation, has remarkable reduction manufacturing cost, effectively enhances productivity, and greatly expands the many merits such as the manufacturing process scope of application.With respect to traditional prepreg-autoclave technique, the saving of fiber/glued membrane pre-preg process, has broken away from the use of pre-dipping machine on the one hand, has significantly reduced production equipment cost, manufactures on the other hand the minimizing of link, has effectively improved production efficiency; Also it should be noted that in addition, for the dry state fibre structure that cannot realize prepreg mode, such as the manufacture of fiber 2.5D/3D braiding structure cast part etc. still can be undertaken by this invented technology, and the technique scope of application has obtained very big expansion.

(2) curing apparatus of thermosetting resin has been broken away from autoclave restriction.As everyone knows, autoclave is technology-intensive advanced equipments of high grade and precision, and its cost and use cost are all quite high, is to form the expensive effective element of composite.Adopt the present invention, can use cheap baking oven/air compressor machine combination and be cured, having broken away under autoclave restriction prerequisite, still can realize the required HTHP condition of cure of thermosetting resin, product quality can obtain guarantee equally.

(3) mold tooling adopts metal female mould structure, and product quality and manufacturing process all obtain optimization.The different male mold frocks of manufacturing with conventional composite materials tubular structure, the present invention adopts formpiston frock, has overcome the technical barrier that composite tubulose structure cannot be manufactured.The introducing of formpiston frock, has improved tubulose product outer mold surface precision on the one hand, and product quality is effectively improved; On the other hand, former frock can facilitate integral weaving tubular structure that realization is installed in mould, reduces stripping process operation easier.Therefore say, the introducing of former mold tooling structure has reached and has realized the high efficiency manufacture of composite tubulose product and the dual purpose that high-quality is manufactured.

(4) adopt air bag as auxiliary encapsulation pressurised material, avoided " bridge formation " phenomenon, promoted the qualification rate of product.Composite material manufacturing process need to carry out Vacuum Package, if vacuum encapsulation process imperfection will cause " bridge formation " phenomenon to occur, finally forms product " defect ".Conventional method adopts vacuum bag to encapsulate pressurization, and vacuum bag deformation performance is poor, very easily occurs " bridge formation " phenomenon, and operational sequence effort is consuming time.The present invention adopts air bag auxiliary, air bag material is low than vacuum bag modulus, good springiness, can self-control distortion avoid " bridge formation " phenomenon to occur, in reducing the operational sequence time, improved again operational sequence quality, the qualification rate of composite tubulose product product can obtain effective lifting.

(5) the technology of the present invention basis maturity is high, is convenient to realize promote.The maturity of many-sided technical foundation such as technique that the maturity of invention technology contains or relates to for it, production equipment, material all has strict demand, and the technique basis RFI of the technology of the present invention is quite ripe, and experience accumulation is abundant; The perfect market such as production equipment basis autoclave, baking oven, air compressor machine, of a great variety; Material foundation thermosetting resin glued membrane, dry state fabric etc. both can adopt professional production line equipment to produce voluntarily, can buy again market-oriented finished product completely.From technique basis, production equipment basis provides good technical foundation to comprehensive maturation of material foundation for popularization of the present invention, technology maturity is high, is convenient to realize promote.

In a word, this invention not only can be as the uiform section composite straight pipe of conventional method moulding simple structure efficiently and easily, and can overcome the inconvenient laying, demoulding difficulty and the Forming Quality that when it manufactures special-shaped composite cast product, face and be difficult to the technological difficulties such as guarantee, realize the high efficiency manufacture of the special-shaped tubing product of composite of the labyrinth such as variable cross-section, variable curvature.

Brief description of the drawings

Fig. 1 is the resin molding transfer shaping technology method schematic diagram of manufacturing composite cast part;

Fig. 2 is the cross-sectional view of Fig. 1.

Detailed description of the invention

As shown in Figure 1, combination cavity block 4, generally has the nonmetallic materials of some strength to make by metal material or other to technical solution of the present invention, is at least assembled by upper/lower die.Previously prepared thin rubber flow holes 5, each rubber flow holes 5 is through to mould outside from die face, pore quantity can be to be uniformly distributed, also can be according to product shape, regulate the pore quantity of regional area and form inhomogeneous distribution, pore size should be between Φ 0.5mm~Φ 3.0mm, and each pitch of holes is between 5mm~50mm.Inner inflatable tubulose air bag inner core soft mode 1 is made up as elastomeric material of the large material of ductility, and the thickness of tubulose air bag inner core soft mode 1 is generally between 1mm~10mm.The moulding resin glued membrane 2 of laying on the air bag inner core soft mode 1 of stretching generally selected the extremely modified resin system of thermosetting resin of the types such as mylar, epoxy resin or BMI, resin glued membrane 2, in the time being heated to forming temperature, should have better rheology processing performance.The bore of the dry spool cover 3 of fortifying fibre weaving in advance or be stitched into has certain retractility, can be enclosed within easily on the air bag inner core soft mode 1 of stretching, according to product thickness requirement, regulates the number of plies of dry spool cover 3.

Concrete operation is as follows: (1) is first straight to the 1 use inflation of air bag inner core soft mode or the support of other way stretching, until suitable diameter.Suitable diameter refers to, supports straight air bag inner core soft mode 1 paving and covers on resin glued membrane 2 and dry spool cover 3, after making dry spool cover 3 supports of fiber straight, just in time can put into profile mold cavity; (2) cover prefabricated resin glued membrane 2 to suitable thickness on straight air bag inner core soft mode 1 upper berth of support.Suitable thickness refers to, the amount of the resin glued membrane 2 that paving is covered should ensure to flood the dry spool cover 3 of whole fibers; (3) on having covered the air bag inner core soft mode 1 of resin glued membrane 2, paving puts the dry spool cover 3 of the fortifying fibre that weaves in advance or be stitched into; (4) the air bag inner core soft mode 1 that paving has been covered to resin glued membrane 2 and the dry spool of fiber cover 3 is installed in the die cavity of combination cavity block 4 and matched moulds locking.As prepare non-directional pipe fitting, need suitably to regulate the stretching degree of air bag inner core mantle 1, to can be installed in non-directional combination cavity block 4 after distortion; (5) after matched moulds at air bag inner core soft mode 1 inner chamber filling Compressed Gas until reach resin forming operation pressure parameter value, and be warming up to forming temperature by resin solidification technological requirement.Under the briquetting pressure effect from air bag inner core soft mode 1 direction, the resin of melting will be pressed equably gummosis through hole 5 directions and flow, and the dry spool cover 3 of impregnation of fibers is also discharged surplus resin outside combination former 4 die cavities, keeps temperature and gas pressure until solidified.(6) lay down air bag inner core soft mode 1 interior gas pressure, remove air bag inner core soft mode 1 and combination former 4, can obtain tubular composite material product.

Embodiment 1

Be that Φ 50mm, wall thickness are the straight line carbon fiber pipe that 2.0mm, length are 600mm manufacturing certain diameter, the combination former of steel is made up of upper/lower die, and the diameter of equally distributed pore is Φ 0.5mm, and spacing is 5mm; Air bag inner core soft mode is made up of elastomeric material, the about 1.5mm of wall thickness, and diameter is Φ 40mm; 125 DEG C of cured epoxy resin systems of temperature during glued membrane adopts, the surface density of glued membrane is 100g/m 2; Fortifying fibre adopts the plain of 3K carbon fiber knit, and the surface density of carbon cloth is 193g/m 2, sew up the carbon fiber pipe box into about warp in Φ 42mm left and right by ± 45 ° of directions.

When operation, it is Φ 42mm left and right that air bag inner core soft mode fills certain air pressure to diameter, and paving is covered 15 layers of epoxy resin glued membrane, then covers 10 layers of carbon fiber pipe box on glued membrane upper berth.Paving moves in profile mould after having covered, then mould is placed in drying room.

In the air bag inner core soft mode of sealing, fill compressed air to 0.3MPa; be warming up to 125 DEG C by the programming rate of 1.5 DEG C/min; in this process, can see and have resin to flow out from the pore of mould; heat-insulation pressure keeping solidified after 2 hours; shutdown be cooled to 70 DEG C following after; shed the air pressure in interior type soft mode, open profile mould and haul out inner core mantle, produce straight line carbon fiber pipe.Through checking its appearance and size, wall thickness dimension, linearity and all reaching requirement with core degree, the carbon fiber volume content of pipe reaches 62.0%, finds no the internal flaw such as layering and bubble through ultrasonic nondestructive testing.

Embodiment 2

Be that Φ 65mm, wall thickness are the straight line carbon fiber elliptical tube that 1.5mm, length are 1500mm manufacturing certain diameter, the profile mould of steel is made up of upper/lower die, and the diameter of equally distributed pore is Φ 3mm, and spacing is 50mm; Air bag inner core soft mode is made up of elastomeric material, the about 3mm of wall thickness, and diameter is Φ 60mm; Glued membrane adopts 180 DEG C of cured epoxy resin systems of high temperature, and the surface density of glued membrane is 75g/m 2; Fortifying fibre adopts the unidirectional T300 carbon fibre fabric of U3160, and the surface density of carbon cloth is 160g/m 2.

When operation, it is Φ 63mm left and right that inner core soft mode fills certain air pressure to diameter, and paving is covered 9 layers of epoxy resin glued membrane, then covers 9 layers of carbon fiber pipe box on glued membrane upper berth.Paving moves in profile mould after having covered, then mould is placed in drying room.In the air bag inner core soft mode of sealing, fill compressed air to 0.4MPa; be warming up to 180 DEG C by the programming rate of 3 DEG C/min; in this process, can see and have resin to flow out from the pore of mould; heat-insulation pressure keeping solidified after 2 hours; shutdown be cooled to 60 DEG C following after; shed the air pressure in interior type soft mode, open profile mould and haul out inner core mantle, produce straight line carbon fiber pipe.Through checking its appearance and size, wall thickness dimension, linearity and all reaching requirement with core degree, the carbon fiber volume content of pipe reaches 60.5%, finds no the internal flaw such as layering and bubble through ultrasonic nondestructive testing.

Embodiment 3

Be that Φ 150mm, wall thickness are " S " type carbon fiber elliptical tube that 2.5mm, length are 1500mm manufacturing certain diameter, the profile mould of steel is made up of 3 1/3 modules, and the diameter of equally distributed pore is Φ 1.0mm, and spacing is 30mm; Inner core soft mode is made up of siliceous temperature resistant rubber material, the about 3.0mm of wall thickness, and diameter is Φ 135mm; Glued membrane adopts 100 DEG C of polyurethane resin systems of low temperature, and the surface density of glued membrane is 350g/m 2; Fortifying fibre adopts the pipe box of 6K carbon fiber knit, weave by industrialized machine, and fibrage is taking the direction of 0 °/90 ° as main, and the diameter that pipe box weaves is Φ 140mm, struts more than diameter can reach Φ 150mm.

When operation, in air bag inner core soft mode inner chamber, add the air bag rod of a homemade oval clavate, the diameter that is inflated to air bag inner core soft mode is Φ 140mm left and right, and paving is covered 6 layers of modified bismaleimide resin glued membrane, then on glued membrane, puts the pipe box of 5 layers of carbon fiber knit.Paving moves in profile mould after having covered, and is slightly arranged in " S " pattern chamber of mould with force deformation, then fixes upper/lower die.Do the coated whole metal die of a vacuum bag, and be communicated in inner core soft mode chamber, vacuumize and inflation in inflating air pouch is laid down and extracted out from inner core soft mode inner chamber afterwards, keep inner core soft mode inner chamber and outside atmosphere connection.Mounted mould is placed in autoclave; according to following technological forming: keep the vacuum in vacuum bag; air pressure in autoclave is adjusted to 0.5MPa; be warming up to 100 DEG C by the programming rate of 2 DEG C/min; heat-insulation pressure keeping solidified after 2 hours, shut down to be cooled to 60 DEG C and can to shed mold tooling after following and produce " S " type carbon fiber elliptical tube.Through checking its appearance and size, wall thickness dimension all to reach requirement, the carbon fiber volume content of pipe reaches 61.4%, finds no the internal flaw such as layering and bubble through nondestructive testing.

Embodiment 4

Be that Φ 150mm, wall thickness are " S " type carbon fiber elliptical tube that 1mm, length are 1500mm manufacturing certain diameter, the profile mould of steel is made up of 3 1/3 modules, and the diameter of equally distributed pore is Φ 1.0mm, and spacing is 30mm; Inner core soft mode is made up of siliceous temperature resistant rubber material, the about 3.0mm of wall thickness, and diameter is Φ 135mm; Glued membrane adopts 180 DEG C of epoxide modified bismaleimide resin systems of high temperature, and the surface density of glued membrane is 550g/m 2; Fortifying fibre adopts the unidirectional T700 carbon fibre fabric of U7192D.

When operation, in air bag inner core soft mode inner chamber, add the air bag rod of a homemade oval clavate, the diameter that is inflated to air bag inner core soft mode is Φ 140mm left and right, and paving is covered 1 layer of modified bismaleimide resin glued membrane, then on glued membrane, puts the pipe box of 6 layers of carbon fiber knit.Paving moves in profile mould after having covered, and is slightly arranged in " S " pattern chamber of mould with force deformation, then fixes upper/lower die.Do the coated whole metal die of a vacuum bag, and be communicated in inner core soft mode chamber, vacuumize and inflation in inflating air pouch is laid down and extracted out from inner core soft mode inner chamber afterwards, keep inner core soft mode inner chamber and outside atmosphere connection.Mounted mould is placed in autoclave; according to following technological forming: keep the vacuum in vacuum bag; air pressure in autoclave is adjusted to 0.4MPa; be warming up to 180 DEG C by the programming rate of 1.5 DEG C/min; heat-insulation pressure keeping solidified after 2 hours, shut down to be cooled to 60 DEG C and can to shed mold tooling after following and produce " S " type carbon fiber elliptical tube.Through checking its appearance and size, wall thickness dimension all to reach requirement, the carbon fiber volume content of pipe reaches 60.9%, finds no the internal flaw such as layering and bubble through nondestructive testing.

Embodiment 5

Be that Φ 40mm, wall thickness are "] that 1.5mm, length are 2500mm at certain diameter of manufacture " type glass fibre square pipe, the profile mould of steel is made up of upper/lower die, and the diameter of equally distributed pore is Φ 2.0mm, and spacing is about 20mm; Inner core soft mode is made up of certain elastomeric material, the about 2.0mm of wall thickness, and diameter is Φ 40mm; Glued membrane adopts 100 DEG C of curing modified polyester resin resin systems of low temperature, and the surface density of glued membrane is 250 grams/m; Fortifying fibre adopts commercially available fiberglass braided pipe box, and fibrage is taking the direction of ± 45 ° as main, and the diameter of pipe box braiding is Φ 35mm, more than the diameter strutting can reach Φ 40mm.

When operation, it is Φ 35mm left and right that air bag inner core soft mode is inflated to its diameter expansion, and paving is covered 4 layers of modified polyester resin glued membrane, then on glued membrane, puts 3 layers of glass fibre pipe box.Paving moves to "] along mold cavity in profile mould after having covered " type is in place, after matched moulds, mould is placed in drying room again.In air bag inner core soft mode, fill compressed air to 0.2MPa; be warming up to 100 DEG C by the programming rate of 1 DEG C/min; in this process, can see and have resin to discharge from mould gummosis through hole; heat-insulation pressure keeping solidified after 1 hour; shutdown be cooled to 60 DEG C following after; shed the air pressure in air bag inner core soft mode, open profile mould and be "] of preparation " type glass fibre square pipe.Through checking its appearance and size, wall thickness, mechanical property etc. all to reach designing requirement, its glass fibre volume content is 56%, finds no the internal flaw such as layering and bubble through nondestructive testing.

Embodiment 6

Manufacturing certain diameter is that Φ 80mm, wall thickness are the circular arc that 2.0mm, length are 1000mm, and the top cross-section of circular arc fades to the foursquare glass fibre pipe of 62.5mmX62.5mm.The profile mould of steel is made up of upper/lower die, and the diameter of equally distributed pore is Φ 1.0mm, and spacing is about 25mm in circular cross-section district, and at square sectional, district is about 15mm, is about 20mm in transition region; Inner core soft mode is made up of silastic material, the about 3.0mm of wall thickness, and diameter is Φ 70mm; 125 DEG C of cured epoxy resin systems of temperature during glued membrane adopts, the surface density of glued membrane is 800 grams/m; Fortifying fibre adopts commercially available fiberglass braided pipe box, and fibrage direction is taking the direction of 0 °/90 ° as main, and the internal diameter of pipe box braiding is Φ 70mm, more than the internal diameter strutting can reach Φ 80mm.

When operation, add a homemade inflating air pouch in inner core soft mode inner chamber, the diameter that is inflated to inner core soft mode is Φ 70mm left and right, and paving is covered 4 layers of epoxy resin glued membrane, then on glued membrane, puts 3 layers of fiberglass braided pipe box.Paving moves in profile mould after having covered, and is slightly arranged in the die cavity of circular arc of mould with force deformation, then fixes upper/lower die.Do the coated whole metal die of a vacuum bag, and be communicated to the outer mold surface of inner core soft mode, vacuumize rear removal gasbag internal gas pressure and it is extracted out from inner core soft mode inner chamber, inner core soft mode inner chamber and outside atmosphere are connected.Mounted mould is placed in autoclave; according to following technological forming: keep the vacuum in vacuum bag; air pressure in autoclave is adjusted to 0.4MPa; be warming up to 125 DEG C by the programming rate of 3 DEG C/min; heat-insulation pressure keeping solidified after 2 hours, shut down to be cooled to 70 DEG C and can to shed that mold tooling produces circular arc and circular arc top cross-section fades to foursquare glass fibre pipe after following.

Embodiment 7

Manufacturing certain diameter is that Φ 80mm, wall thickness are the circular arc that 2.0mm, length are 500mm, and the top cross-section of circular arc fades to the foursquare carbon fiber pipe of 62.5mmX62.5mm.The profile mould of steel is made up of 3 1/3 modules, and the diameter of equally distributed pore is Φ 2.0mm, and spacing is about 40mm in circular cross-section district, and at square sectional, district is about 15mm, is about 20mm in transition region; Inner core soft mode is made up of silastic material, the about 3.0mm of wall thickness, and diameter is Φ 70mm; Glued membrane adopts 100 DEG C of curable polyurethane resin systems of low temperature, and the surface density of glued membrane is 300 grams/m; Fortifying fibre adopts the pipe box of commercially available carbon fiber knit, and fibrage direction is taking the direction of 0 °/90 ° as main, and the internal diameter of pipe box braiding is Φ 70mm, more than the internal diameter strutting can reach Φ 80mm.

When operation, add a homemade inflating air pouch in inner core soft mode inner chamber, the diameter that is inflated to inner core soft mode is Φ 70mm left and right, and paving is covered 4 layers of epoxy resin glued membrane, then on glued membrane, puts 8 layers of fiberglass braided pipe box.Paving moves in profile mould after having covered, and is arranged in the die cavity of circular arc of mould, fixes upper/lower die.With the coated whole metal die of a vacuum bag, and be communicated to the outer mold surface of inner core soft mode, vacuumize rear removal gasbag internal gas pressure and it is extracted out from inner core soft mode inner chamber, make inner core soft mode inner chamber and outside atmosphere connection.Mounted mould is placed in autoclave; according to following technological forming: keep the vacuum in vacuum bag; air pressure in autoclave is adjusted to 0.6MPa; be warming up to 100 DEG C by the programming rate of 1.5 DEG C/min; heat-insulation pressure keeping solidified after 2 hours, shut down to be cooled to 60 DEG C and can to shed that mold tooling produces circular arc and circular arc top cross-section fades to foursquare glass fibre pipe after following.

Embodiment 8

Manufacturing certain diameter is that Φ 80mm, wall thickness are the circular arc that 3.0mm, length are 800mm, and the top cross-section of circular arc fades to the foursquare glass fibre pipe of 62.5mmX62.5mm.The profile mould of steel is made up of upper/lower die, and the diameter of equally distributed pore is Φ 2.0mm, and spacing is about 25mm in circular cross-section district, and at square sectional, district is about 15mm, is about 20mm in transition region; Inner core soft mode is made up of silastic material, the about 3.5mm of wall thickness, and diameter is Φ 70mm; Glued membrane adopts 180 DEG C of curing bismaleimide resin systems of high temperature, and the surface density of glued membrane is 300 grams/m; Fortifying fibre adopts commercially available fiberglass braided pipe box, and fibrage direction is taking the direction of ± 45 ° as main, and the internal diameter of pipe box braiding is Φ 70mm, more than the internal diameter strutting can reach Φ 80mm.

When operation, add a homemade inflating air pouch in inner core soft mode inner chamber, the diameter that is inflated to inner core soft mode is Φ 70mm left and right, and paving is covered 4 layers of epoxy resin glued membrane, then on glued membrane, puts 12 layers of fiberglass braided pipe box.Paving moves in profile mould after having covered, and is slightly arranged in the die cavity of circular arc of mould with force deformation, then fixes upper/lower die.Do the coated whole metal die of a vacuum bag, and be communicated to the outer mold surface of inner core soft mode, vacuumize rear removal gasbag internal gas pressure and it is extracted out from inner core soft mode inner chamber, inner core soft mode inner chamber and outside atmosphere are connected.Mounted mould is placed in autoclave; according to following technological forming: keep the vacuum in vacuum bag; air pressure in autoclave is adjusted to 0.6MPa; be warming up to 180 DEG C by the programming rate of 2 DEG C/min; heat-insulation pressure keeping solidified after 2 hours, shut down to be cooled to 60 DEG C and can to shed that mold tooling produces circular arc and circular arc top cross-section fades to foursquare glass fibre pipe after following.

Claims (6)

1. the method for a gasbag pressurizes assisted resin film transfer formation composite cast part, it is characterized in that: (one) profile mould is steel combination cavity block, on die face, be distributed with gummosis through hole, each gummosis through hole is through to mould outside from profile in mould, (2) built-in inflation tubulose air bag inner core soft mode, the external diameter of inflation tubulose air bag inner core soft mode and shape are with corresponding by internal diameter and the shape of forming composite cast part, air bag inner core soft mode termination arranges charging connector (three) thermosetting resin and is being prefabricated on the inflation tubulose air bag inner core soft mode that after glued membrane, first paving is being inflated, the dry yarn of charging connector exposed outside (four) fortifying fibre weaves or is stitched into sleeve pipe structure in advance, be enclosed within on the inflation tubulose air bag inner core soft mode that is affixed with thermosetting resin glued membrane, (5) combination cavity block being assemblied in to cover has on the inflation tubulose air bag inner core soft mode of sleeve pipe structure and thermosetting resin glued membrane, (6) carry out composite material solidification according to resin solidification technique, its curing mode is one of following, (1) utilize charging connector place to carry out ftercompction to inflation tubulose air bag inner core soft mode, ensure that inflation tubulose intracapsular pressure is stabilized in the desired pressure of resin solidification technique, use curing oven moulding, (2) abolish the soft mode of inflating tubulose air bag inner core soft mode two ends, jointly whole moulds are sealed with vacuum bag and air bag inner core soft mode, inner core soft mode inner chamber and vacuum bag outside are communicated with, with the moulding of autoclave pressurized, heated, (7) after having solidified, remove combination cavity block, take out inflation tubulose air bag inner core soft mode, obtain composite cast part.
2. according to the method for described a kind of gasbag pressurizes assisted resin film transfer formation composite cast part of right 1, it is characterized in that: the aperture size of the gummosis through hole distributing on described profile mould is between Φ 0.5mm~Φ 3.0mm, and pitch of holes is between 5mm~50mm.
3. according to the method for described a kind of gasbag pressurizes assisted resin film transfer formation composite cast part of right 1, it is characterized in that: described profile mould is at least assembled for combination cavity block by two parts mould.
4. according to the method for a kind of gasbag pressurizes assisted resin film transfer formation composite cast part described in right 1, it is characterized in that: the thermosetting resin of described paving on inflation tubulose air bag inner core soft mode is one or more layers.
5. according to the method for a kind of gasbag pressurizes assisted resin film transfer formation composite cast part described in right 1, it is characterized in that: described thermosetting resin refers to mylar, epoxy resin or bimaleimide resin.
6. according to the method for a kind of gasbag pressurizes assisted resin film transfer formation composite cast part described in right 1, it is characterized in that: described thermosetting resin refers to the modified system of mylar, epoxy resin or bimaleimide resin.
CN201410250380.4A 2014-06-06 2014-06-06 Method for forming composite material pipe mold element by pressurizing air bags with assistance of resin film transfer CN104070687A (en)

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CN104842479A (en) * 2015-05-15 2015-08-19 湖北三江航天江河化工科技有限公司 Rubber airbag for manufacturing heat insulating layer of engine
CN104988668A (en) * 2015-07-15 2015-10-21 湖北三江航天江北机械工程有限公司 Stitching braiding method for fiber fabric for antenna cover and specific stitching die
CN105415702A (en) * 2016-01-21 2016-03-23 大连理工大学 Integral forming method of easy-to-demold composite material storage tank
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CN108749030A (en) * 2018-06-22 2018-11-06 广联航空工业股份有限公司 A method of preparing composite material tube using internal expanding method molding die
CN109153195A (en) * 2016-05-11 2019-01-04 康蒂泰克Mgw有限公司 Method for manufacturing pressurizing air tracheae
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CN104708835A (en) * 2014-11-06 2015-06-17 上海复合材料科技有限公司 RTM (resin transfer molding) molding method for carbon-fibre composite complex grid structure
CN104527093A (en) * 2014-11-12 2015-04-22 上海迪诺克新材料科技有限公司 A novel process of manufacturing a carbon fiber pipe fitting product
CN104842479A (en) * 2015-05-15 2015-08-19 湖北三江航天江河化工科技有限公司 Rubber airbag for manufacturing heat insulating layer of engine
CN104988668A (en) * 2015-07-15 2015-10-21 湖北三江航天江北机械工程有限公司 Stitching braiding method for fiber fabric for antenna cover and specific stitching die
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CN109153195A (en) * 2016-05-11 2019-01-04 康蒂泰克Mgw有限公司 Method for manufacturing pressurizing air tracheae
CN106239929A (en) * 2016-08-30 2016-12-21 山东双科技股份有限公司 A kind of making forming method of composite material pipe
CN106182805A (en) * 2016-09-09 2016-12-07 西安爱生技术集团公司 A kind of manufacturing process of the isometrical tubular structure of carbon fibre composite
CN106393743A (en) * 2016-11-30 2017-02-15 江西洪都航空工业集团有限责任公司 Composite material intake way forming mold
CN107020760A (en) * 2017-03-16 2017-08-08 泰山体育产业集团有限公司 A kind of tubular composite material part forming methods
WO2018196514A1 (en) * 2017-04-28 2018-11-01 深圳光启高等理工研究院 Method for preparing composite material gas intake passage, and composite material gas intake passage
WO2018196515A1 (en) * 2017-04-28 2018-11-01 深圳光启高等理工研究院 Composite material gas intake passage and preparation method therefor, and air vehicle
CN108381935A (en) * 2018-04-18 2018-08-10 佛山市奥耶克思机械设备有限公司 A kind of hose toughness stiffening device with reinforce method
CN108749030A (en) * 2018-06-22 2018-11-06 广联航空工业股份有限公司 A method of preparing composite material tube using internal expanding method molding die
CN108749030B (en) * 2018-06-22 2020-01-21 广联航空工业股份有限公司 Method for preparing composite material pipe by using internal expansion method forming die
CN109291467A (en) * 2018-10-31 2019-02-01 重庆市凯拉米新材料科技有限公司 A kind of carbon fiber thermal thermoset material luggage case hot pressing air bag moulding process
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CN109677782B (en) * 2018-12-25 2020-10-16 苏州睿澎诚科技有限公司 Batch manufacturing method of engine packing box bottom supporting seats

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Application publication date: 20141001