CN104275804B - The preparation method of a kind of large size, thin walled foamed sandwich structure and the application of this structure - Google Patents
The preparation method of a kind of large size, thin walled foamed sandwich structure and the application of this structure Download PDFInfo
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- CN104275804B CN104275804B CN201410228454.4A CN201410228454A CN104275804B CN 104275804 B CN104275804 B CN 104275804B CN 201410228454 A CN201410228454 A CN 201410228454A CN 104275804 B CN104275804 B CN 104275804B
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- 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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
-
- 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
- B29C70/02—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements, e.g. non-specified reinforcements, fibrous reinforcing inserts and fillers, e.g. particulate fillers, incorporated in matrix material, forming one or more layers and with or without non-reinforced or non-filled layers
- B29C70/026—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements, e.g. non-specified reinforcements, fibrous reinforcing inserts and fillers, e.g. particulate fillers, incorporated in matrix material, forming one or more layers and with or without non-reinforced or non-filled layers and with one or more layers of pure plastics material, e.g. foam layers
-
- 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
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
- B29C70/228—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure being stacked in parallel layers with fibres of adjacent layers crossing at substantial angles
-
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Textile Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention relates to the preparation method of a kind of large size, thin walled foamed sandwich structure, comprise the following steps: (1) uses prepreg to carry out laying, and curing molding inside panel unit at mold outer surface, described inside panel unit is the cavity structure of cross section Guan Bi；(2) use overlapping edges bonding mode to link together successively along cavity axis direction multiple inside panel unit, form inside panel；(3) cystosepiment is bonded in inside panel outer surface；(4) inside panel outer surface needs the foam of pre-buried boss position reject, boss is bonded in described position；(5) use prepreg to carry out laying at cystosepiment outer surface, re-lay auxiliary material, and evacuation, solidification, obtain the exterior skin of entirety；Large size, thin walled foam interlayer structure compound material prepared by present invention process method not only has the advantages such as lightweight, heat-proof quality is excellent, good rigidity, and mould puts into low, and technical process is simple, easy to operate, has the strongest practicality.
Description
Technical field
The present invention relates to preparation method and the application of this structure of a kind of large size, thin walled foamed sandwich structure, belong to non-gold
Genus/composite material process planning technical field.
Background technology
In recent years, woven foam sandwich composite material structure is at carrier rocket, aviation, blade of wind-driven generator, sports device
The fields such as material, medical equipment accessory, shipbuilding, train locomotive are widely applied, and especially in developed countries such as America and Japan, extensively apply
In high-tech sector, mainly have: the trousers of the Delta carrier rocket of the U.S., the rectification of the HII-A carrier rocket of Mitsubishi
Cover, the locomotive engine of modern architecture in Japan, the medical bed board of company, the blade of wind-driven generator etc. of Vestas such as general, Siemens.I
State uses woven foam sandwich composite material later in high-end field application, and depends in the foam core material major part of aerospace applications
Rely import, developing although domestic, but overall performance and same kind of products at abroad still suffer from certain gap.Except in Aero-Space etc.
High-end field, at other civil area such as bullet train head, blades of large-scale wind driven generator etc., the most also applies relatively early, and
A large amount of uses.And domestic association area, apply later, and major part project is for abroad subcontracting or copying, material therefore used
Material also major part is that foreign material, especially core are mainly import.At present, domestic foam core material composite structure mainly should
It is used in house partition board, refrigerator car dividing plate etc., plays thermal insulation function；The foam core material of application is based on polyurethane (PU) foam.
Although China's woven foam sandwich composite material application and research exist bigger gap compared with abroad, but in recent years, domestic air mail navigates
It field, as helicopter blade, rocket trousers, guided missile Fragile cap, launching tube cover, wind-tunnel blade have applied this knot the most
Structure, quickly grows.
Foam interlayer structure compound material is usually the mould putting into a side skin, molding eyelid covering on mould, then will
Foam core material is bonded on eyelid covering, then the surface forming opposite side eyelid covering at foam core material；Or by the most independent for two side skins
Molding, then relies on adhesive to be bonded together with eyelid covering by foam core material.Air channel and the sandwich of current home and abroad molding
Composite is compared: air channel length is longer, and sectional dimension is equal and less, rather than the most seen in coniform, spherical crown shape；Wind
The inside and outside eyelid covering in road is circumferentially Guan Bi, rather than the version assembled again after point lobe molding generally used.Technology system at present
It is high to there is molding inside panel mould processing difficulties, input cost in standby air channel, and the thick inside panel of 2mm exist demoulding difficulty,
Even cannot the danger of the demoulding；Air channel sandwich material select which kind of foam can the solidification temperature of exterior skin fire-retardant, resistance to, simultaneously
Local collapse is not had the most yet；Foam collapse, air channel appearance deformation and office is there is during exterior skin global formation
There is the problems such as fold in portion.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency of prior art, it is provided that a kind of large size, thin walled foamed sandwich structure
Preparation method, large size, thin walled foamed sandwich structure not only heat-proof quality prepared by the method is good, good seal performance, product are firm
Degree excellence, lightweight, and with short production cycle, low cost, efficiency is high, simple and feasible.
Another object of the present invention is to provide the application of a kind of large size, thin walled foamed sandwich structure.
The above-mentioned purpose of the present invention is mainly achieved by following technical solution:
The preparation method of a kind of large size, thin walled foamed sandwich structure, comprises the following steps:
Step (one), employing prepreg carry out laying, and curing molding inside panel unit, described Inner Mongol at mold outer surface
Skin unit is the cavity structure of cross section Guan Bi；
Step (two), use overlapping edges bonding mode even successively along cavity axis direction multiple inside panel unit
It is connected together, forms inside panel；
Step (three), cystosepiment is bonded in inside panel outer surface；
Step (four), by inside panel outer surface need pre-buried boss position foam reject, boss is bonded in institute
Rheme is put；
Step (five), use prepreg to carry out laying at cystosepiment outer surface, re-lay auxiliary material, and evacuation, solid
Change, obtain the exterior skin of entirety.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, edge to inside panel unit in step (two)
Lap-joint carries out local reinforcement, i.e. uses width to carry out reinforcement more than the prepreg of overlap edge at lap position.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, carry out the resin in the prepreg of reinforcement and shape
Becoming the resin-phase in the prepreg of inside panel same, reinforcing fiber is carbon fiber or glass fibre two-dimensional fabric.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, the cross section of inside panel unit is polygon or circle
Shape.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, inside panel unit is along the length of cavity axis direction
Spend≤3 meters.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, the prepreg in step (), (five) includes
Resin and reinforcing fiber, wherein resin selects epoxy-resin systems, unsaturated polyester resin or phenolic resin；Reinforcing fiber is selected
Carbon fiber and carbon cloth thereof, or glass fibre and glass cloth thereof.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, the laying of prepreg in step (), (five)
Mode is laying angle (90 °/0 °) n, and wherein n is positive integer, n >=4.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, bonding in step (two), I (three), (four) adopt
Bonding agent be J-135 or J-22 adhesive.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, the foam in step (three) is phenolic resin bubble
Foam, polyamide foam or PMI foam.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, inside panel unit in step (), (five),
Exterior skin solidification process is as follows: first evacuation, and when starting to warm up after vacuum gauge pressure≤-0.09MPa, heating rate controls 20
～60 DEG C/h, between 90～160 DEG C, it is incubated 20～40min, then pressurized control pressure is 0～0.6MPa, continues afterwards to rise
Temperature, controlling solidification temperature is that 120～180 DEG C of insulations naturally are down to less than 80 DEG C and are taken out product after 3～8 hours, completes to solidify.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, carry out at the overlapping edges of inside panel unit
Solidification process in local reinforcement is as follows: first evacuation, when starting to warm up after vacuum gauge pressure≤-0.09MPa, and heating rate control
System, at 20～60 DEG C/h, is incubated 20～40min follow-up temperature of continuing rising between 90～160 DEG C, and controlling solidification temperature is 120～180
DEG C insulation naturally was down to less than 80 DEG C and is taken out product after 3～8 hours, completed to solidify.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, inside panel, the thickness >=1.5mm of exterior skin.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, cystosepiment is bonded in Inner Mongol by step (three)
Skin outer surface, and cystosepiment gaping of joints is repaired.
In the preparation method of above-mentioned large size, thin walled foamed sandwich structure, the auxiliary material laid in step (five) is fluorine
Four cloth and ventilated membrane, then re-use aluminium sheet compress, fixing and use airfelt to be coated with, finally make seal bag by interior,
Exterior skin seals, evacuation, puts into curing oven afterwards.
The application of the foamed sandwich structure that the preparation method of above-mentioned large size, thin walled foamed sandwich structure obtains, uses the style
Road.
The present invention compared with prior art has the advantages that
(1), the present invention is directed to problem present in large size, thin walled foamed sandwich structure (such as air channel) preparation process, carry
Go out a kind of new preparation thinking, used mould to prepare inside panel unit first, then inside panel unit is attached, formed whole
Internal eyelid covering, the mode i.e. using inside panel sectional forming to overlap again prepares inside panel, by molding inside panel die length chi
Very little control within the specific limits, had both reduced mould difficulty of processing, had used requirement and production cost, reduced again the paving of inside panel
Layer difficulty, demoulding difficulty and the lifting of mould, transport difficulty, inside panel is simple to operate, production efficiency is high to utilize this scheme to produce,
And large-sized inside panel can be prepared as required；
(2), the inside and outside eyelid covering of the present invention use 90 degree and 0 degree replace ply sequence lay prepregs, the thickness of eyelid covering exists
During relatively thin size, along it, axially and hoop is respectively provided with preferable rigidity, there is not local collapse phenomenon in edge or face, permissible
Realize the molding of large size, thin walled component and follow-up assembling and use, it is ensured that product quality and performances, and alleviate product weight
Amount；
(3), after edge mate overlaps and use adhesive bonding between inside panel each unit of the present invention, then prepreg is used
Outside its lap position, use prepreg reinforcement, both can strengthen the firmness of lap position, simultaneously it is also ensured that Inner Mongol
The sealing property of skin, prevents the air channel of follow-up preparation from leaking gas, scrapping, is highly profitable the sealing property improving air channel；
(4) method that foam core of the present invention employing is spliced is bonding on inside panel, assembling, has both reduced foam core to processing
Equipment and the requirement of difficulty of processing, be also beneficial to the preservation of foam core, transport；Relatively directly on eyelid covering, spray mo(u)lding foam core is again
The method of processing, the method is shortening the aspects such as life cycle of the product, Foam machining difficulty and Defects in Foam control advantageously；
(5), inside panel element length, thickness have been carried out preferably by the present invention, it is contemplated that the processing cost of mould, and eyelid covering takes off
The realizability of mould and the guarantee of the bonding rear rigidity of follow-up inside panel unit, it is the most suitable that its length controls at 2.5 meters-3 meters；Cover
Skin thickness is had any different because reinforcing material is different, and reinforcement is that its THICKNESS CONTROL of glass fibre prepreg is at 1.5mm～2mm
Ensureing the use requirement of product, reinforcement is that the prepreg thickness of carbon fiber can be the most thinning；
(6), the mode that exterior skin of the present invention uses sealing bag entirely to wrap solidifies.Compared with using half packet mode, outer illiteracy
Skin solidification uses the sealing bag vacuum of whole subcontracting mode to keep more preferably, is more beneficial for ensureing the quality of exterior skin, the rigidity in air channel
With its sealing property；
(7), the air channel loss of weight prepared of the present invention with the obvious advantage, and designability is strong.The air channel prepared by this process
Lighter in weight, than metal solution loss of weight more than 50%；Requirement, the thermal insulation in design air channel can also be used according to air channel simultaneously
Can, fire-retardant, wave transparent and stealthy etc. functional；
(8), large size, thin walled foam layer prepared by the preparation method of the large size, thin walled foamed sandwich structure of the present invention is multiple
Condensation material not only heat-proof quality is good, good seal performance, product rigidity excellent, lightweight, and with short production cycle, low cost, effect
Rate is high, simple and feasible.
The air channel that present invention process method produces has passed through its inflation, has drenched with rain and the certification test such as heat-proof quality, than
Use metal solution loss of weight nearly 50%.
Accompanying drawing explanation
Fig. 1 is the large size, thin walled foamed sandwich structure preparation method process chart of the present invention；
Fig. 2 is inside panel unit formation mould schematic diagram of the present invention；
Fig. 3 is the cross sectional representation of thin-walled foamed sandwich structure prepared by the inventive method；
Fig. 4 is inside panel vacuum or solidification of hot-press tank molding installation diagram in preparation method of the present invention；
Fig. 5 is exterior skin vacuum or solidification of hot-press tank molding installation diagram in preparation method of the present invention；
Wherein: 1. vacuum bag nylon film 2. porose fluorine four isolated material 3. inside panel or its prepreg lamination 4. mould
Tool material 5. vacuum seal rubber belt 6. airfelt 7. isolating membrane 8. aluminium sheet 9. exterior skin prepreg lamination 10. cystosepiment
The 11. pre-buried bosses of adhesive 12..
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings:
Embodiment 1
Large size, thin walled foam interlayer structure compound material preparation method comprises the following steps:
(1) using S4C660JA/610 high-intensity fiber prepreg as air channel inside panel prepreg, its laying angle is
(90°/0°)5, paving 10 layers altogether；Wherein S4C660JA/610 prepreg fiber areal densities is 276 ± 5g/m2, resin content is 34 ±
3%, prepreg thickness is 0.25 ± 0.02mm, fabric width 1.0m.
It is illustrated in figure 2 inside panel unit formation mould schematic diagram of the present invention, the profile of mould and needs preparation
Inside panel form fit, is irregular hexagon, then mould as needed the cross section of the inside panel of preparation in the present embodiment
Cross section also for the irregular hexagon that matches, length≤3 meter of mould, preferably 2.5～3 meters, prepare
The length of inside panel unit be also 2.5～3 meters.
Prepreg, after the complete layer in mould upper berth, is coated with, seals, evacuation, when the laggard baking oven of vacuum gauge pressure≤-0.090MPa
Starting to warm up, heating rate controls at 20～25 DEG C/h, to being incubated 25～30min solidifications when 90～95 DEG C, then proceedes to 20
～the ramp of 25 DEG C/h, rising to 130～135 DEG C of insulation 4h and carry out post processing, post processing naturally cools to room temperature after terminating
The demoulding.Complete the preparation of inside panel unit, prepare 6 inside panel unit altogether.It is illustrated in figure 4 Inner Mongol in preparation method of the present invention
Skin vacuum or solidification of hot-press tank molding installation diagram.
(2) overlapping edges bonding mode is used to be connected to one successively along cavity axis direction 6 inside panel unit
Rise, form inside panel；Lap width, at about 50mm, uses adhesive J-135 to carry out bonding, notes section after each section is bonding
Between the regulation, fixing of linearity.
(3) using width is that step (2) bonding location is carried out locally spreading by the SW280F-90a/610 prepreg cloth of 100mm
Layer, the center line of laying width overlaps with seam, and the number of plies is 4 layers；The wherein glass cloth surface density of SW280F-90a/610 prepreg
It is 280 ± 5g/m2, resin content 34 ± 3%, prepreg thickness is 0.25 ± 0.02mm, fabric width 900mm.
Prepreg cloth, after inside panel unit each section docking location has spread layer, prepares a sealing in air channel inner surface entirety
Bag cladding, seal, evacuation, respectively prepare one in the local reinforcement position, outside of air channel inside panel simultaneously and seal bag cladding, close
Envelope, evacuation, when above vacuum bag vacuum gauge pressure≤laggard baking oven of-0.090MPa starts to warm up, heating rate control 20～
25 DEG C/h, to when 90～95 DEG C be incubated 25～30min solidification, then proceed to the ramp of 20～25 DEG C/h, rise to 130～
135 DEG C of insulation 4h carry out post processing, and post processing naturally cools to the room temperature demoulding after terminating.
(4) the air channel inside panel of phenolic foam board previously prepared, that process on request Yu step (3) is carried out adaptation, office
Position, portion can repair phenolic foam board.After phenolic foam board coordinates with air channel inside panel properly, use J-135 adhesive by foam
Plate is bonded on the air channel of its correspondence, then layer overlay aluminium sheet outside cystosepiment, and use fastens device general outside aluminium sheet
Aluminium sheet is pressed on cystosepiment, in order to cystosepiment is preferably fitted with air channel.Wherein phenolic foam board density is at 50 ± 10kg/
m3, compressive strength >=0.15MPa, rate of closed hole >=90%.
(5) aluminium sheet in step of dismantling (4) outside, according to local openings or the requirement of bonding boss, in foam specific bit
Put setting-out, rejecting needs aperture position or the foam of bonding boss position, and needs the position of bonding boss on inside panel
Put carry out polishing, adaptive.Use J-135 adhesive to be bonded on inside panel by boss and use to fasten device and be fixed, press
Tightly, dismantle after waiting adhesive solidification and fasten device, the boss being bonded with is repaired so that it is transition smooth with Surrounding foam.
(6) prepreg S4C660JA/610 and prepreg cloth SW280F-90a/610, its laying angle are spread in product external surfaces
It is followed successively by inside-out (90/0 °/90 °/0 °/90 °/prepreg cloth/0 °), altogether paving 7 layers.Wherein S4C660JA/610 prepreg and
The same step of the performance parameter (1) and (2) of SW280F-90a/610 prepreg cloth
Prepreg, after the complete layer in foam core upper berth, spreads one layer of fluorine four cloth and ventilated membrane, then re-uses aluminium sheet and be layered on above,
And outside aluminium sheet use rubber plaster fix aluminium sheet position, use the most successively obturator membrane, airfelt and nylon film cladding, close
Envelope, evacuation.When the laggard baking oven of vacuum gauge pressure≤-0.096MPa starts to warm up, heating rate controls at 20～25 DEG C/h, to 90
～when 95 DEG C, it is incubated 25～30min solidifications, then proceed to the ramp of 20～25 DEG C/h, rise to 130～135 DEG C of insulation 4h
Carrying out post processing, post processing naturally cools to the room temperature demoulding after terminating.It is illustrated in figure 5 exterior skin in preparation method of the present invention true
Sky or solidification of hot-press tank molding installation diagram.
(7) after product has taken off mould, can as required local openings mounting assembly, mounting structure make its form one close
The cavity of envelope, for the air channel of ventilation equipment；The depression or the defect that there is outward appearance can use putty to repair its outward appearance.
It is illustrated in figure 1 the large size, thin walled foamed sandwich structure preparation method process chart of the present invention.It is illustrated in figure 3 the present invention
The cross sectional representation of thin-walled foamed sandwich structure prepared by method, including inside panel 3, exterior skin 9, cystosepiment 10 with pre-buried add
Strong block 12.
Through length about 15m in air channel prepared by above step entirety, during interior the blowing pressure≤3000Pa, air channel without deformation, different
Ring, and every min pressure drop≤0.5%, weight about 270kg.
Embodiment 2
Large size, thin walled foam interlayer structure compound material preparation method comprises the following steps:
(1) using carbon fiber T300-3K/603 prepreg as air channel inside panel prepreg, its laying angle is
(90 °/0 °) 8, altogether paving 8 layers；Wherein T300-3K/603 prepreg fiber areal densities is 130 ± 5g/m2, resin content is 44 ±
4%, prepreg thickness is 0.125 ± 0.02mm, fabric width 1.0m.
Prepreg, after the complete layer in mould upper berth, is coated with, seals, evacuation, when the laggard hot pressing of vacuum gauge pressure≤-0.090MPa
Tank starts to warm up, and heating rate controls at 20～30 DEG C/h, and to 120～125 insulation 30min, then pressurized control pressure is
0.6MPa, then proceedes to heat up, and controlling post-processing temperature is that 175～180 DEG C of insulations are down to 80 DEG C after 4 hours naturally, release takes
Going out product, solidification completes.
Solidification naturally cools to the room temperature demoulding after terminating, and obtains inside panel unit.Prepare 6 inside panel unit altogether.
(2) overlapping edges bonding mode is used to be connected to one successively along cavity axis direction 6 inside panel unit
Rise, form inside panel；Lap width, at about 50mm, uses adhesive J-135 to carry out bonding, notes section after each section is bonding
Between the regulation, fixing of linearity.
(3) using width is that step (2) bonding location is carried out locally spreading by MT300-3K carbon cloth/603 prepreg cloth of 100mm
Layer, the center line of laying width overlaps with seam, and the number of plies is 4 layers；Wherein the surface density of prepreg cloth is 260 ± 5g/m2, resin content
44 ± 4%, prepreg thickness is 0.25 ± 0.02mm, fabric width 900mm.
Prepreg cloth, after inside panel unit each section docking location has spread layer, prepares a sealing in air channel inner surface entirety
Bag cladding, seal, evacuation, respectively prepare one in the local reinforcement position, outside of air channel inside panel simultaneously and seal bag cladding, close
Envelope, evacuation, when above vacuum bag vacuum gauge pressure≤laggard baking oven of-0.096MPa starts to warm up, heating rate control 20～
30 DEG C/h, to 120～125 insulation 30min, then proceed to heat up, control post-processing temperature be 175～180 DEG C insulation 4 hours after
Naturally the room temperature demoulding it is down to.
(4) the air channel inside panel of PMI cystosepiment previously prepared, that process on request Yu step (3) is carried out adaptation, locally
Position can repair phenolic foam board.After cystosepiment coordinates with air channel inside panel properly, use J-135 adhesive that cystosepiment is bonding
On the air channel of its correspondence, then layer overlay aluminium sheet outside cystosepiment, and outside aluminium sheet, use that to fasten device tight by aluminium sheet
It is pressed on cystosepiment, in order to cystosepiment is preferably fitted with air channel.Wherein cystosepiment density is at 70 ± 10kg/m3, compression is strong
Degree >=0.7MPa, rate of closed hole >=90%.
(5) aluminium sheet in step of dismantling (4) outside, according to local openings or the requirement of bonding boss, in foam specific bit
Put setting-out, rejecting needs aperture position or the foam of bonding boss position, and needs the position of bonding boss on inside panel
Put carry out polishing, adaptive.Use J-135 adhesive to be bonded on inside panel by boss and use to fasten device and be fixed, press
Tightly, dismantle after waiting adhesive solidification and fasten device, the boss being bonded with is repaired so that it is transition smooth with Surrounding foam.
(6) spreading prepreg T300-3K/610 and prepreg cloth MT300-3K/610 in product external surfaces, its laying angle is from inner
Outwards it is followed successively by (90 °/0 °/90 °/0 °/90 °/90 °/0 °/90 °/0 °/prepreg cloth), altogether paving 10 layers.Wherein T300-3K/610 is pre-
Leaching material and the same step of the performance parameter (1) and (2) of SW280F-90a/610 prepreg cloth
Prepreg, after the complete layer in foam core upper berth, spreads one layer of fluorine four cloth and ventilated membrane, then re-uses aluminium sheet and be layered on above,
And outside aluminium sheet use rubber plaster fix aluminium sheet position, use the most successively obturator membrane, airfelt and nylon film cladding, close
Envelope, evacuation, when the laggard autoclave of vacuum gauge pressure≤-0.090MPa starts to warm up, and heating rate controls at 20～30 DEG C/h, extremely
120～125 DEG C of insulation 30min, then pressurized control pressure is 0.3MPa, then proceedes to heat up, and controlling post-processing temperature is 175
～180 DEG C insulation 4 hours after naturally be down to 80 DEG C, release taking-up product, solidification completes.
Solidification naturally cools to the room temperature demoulding after terminating.
(7) after product has taken off mould, can as required local openings mounting assembly, mounting structure make its form one close
The cavity of envelope, for the air channel of ventilation equipment；The depression or the defect that there is outward appearance can use putty to repair its outward appearance.
Through length about 15m in air channel prepared by above step entirety, in air channel during the blowing pressure≤3000Pa, air channel is without becoming
Shape, abnormal sound, and every min pressure drop≤0.2%, weight about 230kg.
Embodiment 3
Large size, thin walled foam interlayer structure compound material preparation method comprises the following steps:
(1) using S4C660JA/610 high-intensity fiber prepreg as air channel inside panel prepreg, its laying angle is
(90 °/0 °) 5, altogether paving 10 layers；Wherein S4C660JA/610 prepreg fiber areal densities is 276 ± 5g/m2, resin content is 34
± 3%, prepreg thickness is 0.25 ± 0.02mm, fabric width 1.0m.
Prepreg, after the complete layer in mould upper berth, is coated with, seals, evacuation, when the laggard baking oven of vacuum gauge pressure≤-0.096MPa
Starting to warm up, heating rate controls at 20～25 DEG C/h, is forced into 0.3MPa, so after being incubated 25～30min when 90～95 DEG C
Rear continuation with the ramp of 20～25 DEG C/h, rise to 130～135 DEG C insulation 4h carry out post processing, post processing terminate rear release,
Naturally cool to the room temperature demoulding.Obtain inside panel unit.Prepare 8 inside panel unit altogether.
(2) overlapping edges bonding mode is used to be connected to one successively along cavity axis direction 8 inside panel unit
Rise, form inside panel；Lap width, at about 50mm, uses adhesive J-22 to carry out bonding, notes section after each section is bonding
Between the regulation, fixing of linearity.
(3) using width is that step (2) bonding location is carried out locally spreading by the SW280F-90a/610 prepreg cloth of 100mm
Layer, the center line of laying width overlaps with seam, and the number of plies is 4 layers；The wherein glass cloth surface density of SW280F-90a/610 prepreg
It is 280 ± 5g/m2, resin content 34 ± 3%, prepreg thickness is 0.25 ± 0.02mm, fabric width 900mm.
Prepreg cloth, after air channel each section docking location has spread layer, is prepared one in air channel inner surface entirety and is sealed bag bag
Cover, seal, evacuation, respectively prepare one simultaneously in the local reinforcement position, outside of air channel inside panel and seal bag and be coated with, seal, take out
Vacuum, when above vacuum bag vacuum gauge pressure≤laggard baking oven of-0.096MPa starts to warm up, heating rate control 20～25 DEG C/
H, to being incubated 25～30min solidifications when 90～95 DEG C, then proceedes to, with the ramp of 20～25 DEG C/h, rise to 130～135 DEG C
Insulation 4h carries out post processing, and post processing naturally cools to room temperature after terminating.
(4) the air channel inside panel of PMI cystosepiment previously prepared, that process on request Yu step (3) is carried out adaptation, locally
Position can repair PMI cystosepiment.After cystosepiment coordinates with air channel inside panel properly, J-22 adhesive is used to be bonded in by cystosepiment
On the air channel of its correspondence, then layer overlay aluminium sheet outside cystosepiment, and use outside aluminium sheet and fasten device aluminium sheet is pressed
On cystosepiment, in order to cystosepiment is preferably fitted with air channel.Wherein PMI cystosepiment density is at 70 ± 10kg/m3, compression is strong
Degree >=1.0MPa, rate of closed hole >=90%.
(5) aluminium sheet in step of dismantling (4) outside, according to local openings or the requirement of bonding boss, in foam specific bit
Put setting-out, rejecting needs aperture position or the foam of bonding boss position, and needs the position of bonding boss on inside panel
Put carry out polishing, adaptive.Use J-22 adhesive to be bonded on inside panel by boss and use to fasten device and be fixed, press
Tightly, dismantle after waiting adhesive solidification and fasten device, the boss being bonded with is repaired so that it is transition smooth with Surrounding foam.
(6) prepreg S4C660JA/610 and prepreg cloth SW280F-90a/610, its laying angle are spread in product external surfaces
It is followed successively by inside-out (90/0 °/90 °/0 °/90 °/prepreg cloth/0 °), altogether paving 7 layers.Wherein S4C660JA/610 prepreg and
The same step of the performance parameter (1) and (2) of SW280F-90a/610 prepreg cloth
Prepreg, after the complete layer in foam core upper berth, spreads one layer of fluorine four cloth, ventilated membrane, then re-uses aluminium sheet and be layered on above,
And outside aluminium sheet use rubber plaster fix aluminium sheet position, use the most successively obturator membrane, airfelt and nylon film cladding, close
Envelope, evacuation, when the laggard autoclave of vacuum gauge pressure≤-0.096MPa starts to warm up, and heating rate controls at 20～25 DEG C/h, extremely
It is forced into 0.3MPa after being incubated 25～30min when 90～95 DEG C, then proceedes to, with the ramp of 20～25 DEG C/h, rise to 130
～135 DEG C of insulation 4h carry out post processing, post processing naturally cools to the room temperature demoulding after terminating.
(7) after product has taken off mould, can as required local openings mounting assembly, mounting structure make its form one close
The cavity of envelope, for the air channel of ventilation equipment；The depression or the defect that there is outward appearance can use putty to repair its outward appearance.
Through length about 18m in air channel prepared by above step entirety, in air channel during the blowing pressure≤3000Pa, air channel is without becoming
Shape, abnormal sound, and every min pressure drop≤0.5%, weight is 305kg.
Embodiment 4:
Large size, thin walled foam interlayer structure compound material preparation method comprises the following steps:
(1) using carbon fiber T300-3K/610 prepreg as air channel inside panel prepreg, its laying angle is
(90 °/0 °) 8, altogether paving 8 layers；Wherein T300-3K/610 prepreg fiber areal densities is 130 ± 5g/m2, resin content is 44 ±
4%, prepreg thickness is 0.125 ± 0.02mm, fabric width 1.0m.
Prepreg, after the complete layer in mould upper berth, is coated with, seals, evacuation, when the laggard hot pressing of vacuum gauge pressure≤-0.096MPa
Tank starts to warm up, and heating rate controls at 20～25 DEG C/h, is forced into 0.6MPa after being incubated 25～30min when 90～95 DEG C,
Then proceeding to the ramp of 20～25 DEG C/h, rise to 130～135 DEG C of insulation 4h and carry out post processing, post processing terminates the most certainly
So it is cooled to the room temperature demoulding.Complete the preparation of inside panel unit, prepare 6 inside panel unit altogether.
(2) after air channel inside panel unit formation 6, carrying out overlap joint adaptation between each part, lap width, at about 60mm, uses
Adhesive J-135 carries out bonding, notes the regulation of linearity between section, fixes after each section is bonding.
(3) using width is that step (2) bonding location is carried out locally spreading by the SW280F-90a/610 prepreg cloth of 100mm
Layer, the center line of laying width overlaps with seam, and the number of plies is 4 layers；The wherein glass cloth surface density of SW280F-90a/610 prepreg
It is 280 ± 5g/m2, resin content 34 ± 3%, prepreg thickness is 0.25 ± 0.02mm, fabric width 900mm.
Prepreg cloth, after air channel each section docking location has spread layer, is prepared one in air channel inner surface entirety and is sealed bag bag
Cover, seal, evacuation, respectively prepare one simultaneously in the local reinforcement position, outside of air channel inside panel and seal bag and be coated with, seal, take out
Vacuum, when above vacuum bag vacuum gauge pressure≤laggard baking oven of-0.096MPa starts to warm up, heating rate control 20～25 DEG C/
H, continues with the ramp of 20～25 DEG C/h after being incubated 25～30min when 90～95 DEG C, rises to 130～135 DEG C of insulation 4h
Carrying out post processing, post processing naturally cools to room temperature after terminating.
(4) the air channel inside panel of phenolic foam board previously prepared, that process on request Yu step (3) is carried out adaptation, office
Position, portion can repair cystosepiment.After phenolic foam board coordinates with inside panel properly, J-135 adhesive is used to be bonded in by cystosepiment
On the air channel of its correspondence, then layer overlay aluminium sheet outside cystosepiment, and use outside aluminium sheet and fasten device aluminium sheet is pressed
On cystosepiment, in order to cystosepiment is preferably fitted with air channel.Wherein phenolic foam board density is at 50 ± 10kg/m3, compression
Intensity >=1.0MPa, rate of closed hole >=90%.
(5) aluminium sheet in step of dismantling (4) outside, according to local openings or the requirement of bonding boss, in foam specific bit
Put setting-out, rejecting needs aperture position or the foam of bonding boss position, and needs the position of bonding boss on inside panel
Put carry out polishing, adaptive.Use J-135 adhesive to be bonded on inside panel by boss and use to fasten device and be fixed, press
Tightly, dismantle after waiting adhesive solidification and fasten device, the boss being bonded with is repaired so that it is transition smooth with Surrounding foam.
(6) product external surfaces spread prepreg T300-3K/610 and prepreg cloth SW280F-90a/610, its laying angle from
In be outwards followed successively by (90 °/0 °/90 °/0 °/90 °/90 °/0 °/90 °/0 °/prepreg cloth), altogether paving 10 layers.Wherein T300-3K/610
The same step of the performance parameter (1) and (2) of prepreg and SW280F-90a/610 prepreg cloth
Prepreg, after the complete layer in foam core upper berth, spreads one layer of fluorine four cloth, ventilated membrane, then re-uses aluminium sheet and be layered on above,
And outside aluminium sheet use rubber plaster fix aluminium sheet position, use the most successively obturator membrane, airfelt and nylon film cladding, close
Envelope, evacuation, when the laggard baking oven of vacuum gauge pressure≤-0.096MPa starts to warm up, heating rate controls at 20～25 DEG C/h, to 90
～be incubated after 25～30min when 95 DEG C and continue with the ramp of 20～25 DEG C/h, rise to after 130～135 DEG C of insulation 4h carry out
Processing, post processing naturally cools to the room temperature demoulding after terminating.
(7) after product has taken off mould, can as required local openings mounting assembly, mounting structure make its form one close
The cavity of envelope, for the air channel of ventilation equipment；The depression or the defect that there is outward appearance can use putty to repair its outward appearance.
Through length about 12m in air channel prepared by above step entirety, in air channel during the blowing pressure≤3000Pa, air channel is without becoming
Shape, abnormal sound, and every min pressure drop≤0.4%, weight is 180kg.
The above, the detailed description of the invention that only present invention is optimal, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, the change that can readily occur in or replacement,
All should contain within protection scope of the present invention.
The content not being described in detail in description of the invention belongs to the known technology of professional and technical personnel in the field.
Claims (13)
1. the preparation method of a large size, thin walled foamed sandwich structure, it is characterised in that: comprise the following steps:
Step (one), employing prepreg carry out laying, and curing molding inside panel unit, described inside panel list at mold outer surface
Unit is the cavity structure of cross section Guan Bi；
Step (two), overlapping edges bonding mode is used to be connected to successively along cavity axis direction multiple inside panel unit
Together, inside panel is formed；
Step (three), cystosepiment is bonded in inside panel outer surface；
Step (four), by inside panel outer surface need pre-buried boss position foam reject, boss is bonded in institute's rheme
Put；
Step (five), cystosepiment outer surface use prepreg carry out laying, re-lay auxiliary material, and evacuation, solidification,
To overall exterior skin；
In described step (), (five), the ply sequence of prepreg is laying angle (90 °/0 °) n, and wherein n is positive integer, n >=
4；
Inside panel unit, exterior skin solidification process in described step (), (five) are as follows: first evacuation, when vacuum gauge pressure
Starting to warm up after≤-0.09MPa, heating rate controls at 20～60 DEG C/h, insulation 20～40min between 90～160 DEG C, so
Rear pressurized control pressure is 0～0.6MPa, continue afterwards heat up, control solidification temperature be 120～180 DEG C insulation 3～8 hours after
Naturally it is down to less than 80 DEG C and takes out product, complete solidification.
The preparation method of a kind of large size, thin walled foamed sandwich structure the most according to claim 1, it is characterised in that: described
To carrying out local reinforcement at the overlapping edges of inside panel unit in step (two), i.e. use width more than overlap edge at lap position
Prepreg carry out reinforcement.
The preparation method of a kind of large size, thin walled foamed sandwich structure the most according to claim 2, it is characterised in that: described
Carrying out the resin in the prepreg of reinforcement same with the resin-phase in the prepreg forming inside panel, reinforcing fiber is carbon fiber or glass
Glass fiber two-dimensional fabric.
The preparation method of a kind of large size, thin walled foamed sandwich structure the most according to claim 1, it is characterised in that: described
The cross section of inside panel unit is polygon or circle.
The preparation method of a kind of large size, thin walled foamed sandwich structure the most according to claim 1, it is characterised in that: described
Inside panel unit is along length≤3 meter of cavity axis direction.
The preparation method of a kind of large size, thin walled foamed sandwich structure the most according to claim 1, it is characterised in that: described
Prepreg in step (), (five) includes resin and reinforcing fiber, and wherein resin selects epoxy-resin systems, unsaturated polyester (UP)
Resin or phenolic resin；Reinforcing fiber selects carbon fiber and carbon cloth thereof, or glass fibre and glass cloth thereof.
The preparation method of a kind of large size, thin walled foamed sandwich structure the most according to claim 1, it is characterised in that: described
In step (two), (three), (four), the bonding agent of bonding employing is J-135 or J-22 adhesive.
The preparation method of a kind of large size, thin walled foamed sandwich structure the most according to claim 1, it is characterised in that: described
Foam in step (three) is phenolic resin foam, polyamide foam or PMI foam.
The preparation method of a kind of large size, thin walled foamed sandwich structure the most according to claim 2, it is characterised in that: described
As follows to carrying out the solidification process in local reinforcement at the overlapping edges of inside panel unit: first evacuation, when vacuum gauge pressure≤-
Starting to warm up after 0.09MPa, heating rate controls at 20～60 DEG C/h, continues after being incubated 20～40min between 90～160 DEG C
Heating up, controlling solidification temperature is that 120～180 DEG C of insulations naturally are down to less than 80 DEG C and are taken out product after 3～8 hours, completes to solidify.
The preparation method of a kind of large size, thin walled foamed sandwich structure the most according to claim 1, it is characterised in that: institute
State the thickness >=1.5mm of inside panel, exterior skin.
The preparation method of 11. a kind of large size, thin walled foamed sandwich structures according to claim 1, it is characterised in that: institute
State and cystosepiment is bonded in inside panel outer surface by step (three), and cystosepiment gaping of joints is repaired.
The preparation method of 12. a kind of large size, thin walled foamed sandwich structures according to claim 1, it is characterised in that: institute
Stating the auxiliary material laid in step (five) is fluorine four cloth and ventilated membrane, then re-uses aluminium sheet and compresses, fixes and use ventilative
Felt is coated with, and inside and outside eyelid covering is sealed by finally making sealing bag, evacuation, puts into curing oven afterwards.
The foam that the preparation method of a kind of large size, thin walled foamed sandwich structure that one of 13. claim 1～12 are described obtains
The application of sandwich, it is characterised in that: as air channel.
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