CN102717516A - Multi-wall body composite material component and RTM preparation method thereof - Google Patents
Multi-wall body composite material component and RTM preparation method thereof Download PDFInfo
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- CN102717516A CN102717516A CN2012101811724A CN201210181172A CN102717516A CN 102717516 A CN102717516 A CN 102717516A CN 2012101811724 A CN2012101811724 A CN 2012101811724A CN 201210181172 A CN201210181172 A CN 201210181172A CN 102717516 A CN102717516 A CN 102717516A
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Abstract
The invention discloses a multi-wall body composite material component and a RTM (Resin Transfer Molding) preparation method thereof, wherein the multi-wall body composite material component mainly comprises an interior wall component and an exterior wall component; neither connecting pieces nor cementation surfaces are arranged between the interior wall bodies of the interior wall component, between the exterior wall bodies of the exterior wall component and between the interior wall component and the exterior wall component; and the multi-wall body composite material component is mainly obtained after the interior wall component and the exterior wall component are co-cured and formed integrally. The RTM preparation method comprises the steps as follows: firstly, a die used for forming is prepared, the die comprises a female die and a male die, the female die is arranged on the periphery of a die cavity, and the male die is arranged in a gap among a cavity body of the die cavity; prepared holes for assembling are formed in the female die and the male die; a glue injection hole and a glue outlet hole which are used for forming are pre-formed in the female die; then reinforcing material is laid on the male die, and the female die and the male die are assembled through a fastening piece; and finally, the multi-wall body composite material component is obtained after vacuum glue injection, co-curing forming and demoulding trimming are carried out. The multi-wall body composite material component and the RTM preparation method thereof have the advantages of good building integrity, good reliability and good mechanical property, and can facilitate the realization of a light structural weight of equipment.
Description
Technical field
The present invention relates to a kind of composite element and preparation method thereof, relate in particular to a kind of many bodies of wall composite material structural member and preparation method thereof.
Background technology
The equipment configuration lightweight can improve the maneuverability of equipment, reduces the required energy consumption of power, increases the payload capacity, improves its military service efficient.The light-weighted technological approaches of equipment configuration mainly contains three: the one, and optimized Structure Design satisfies the service condition requirement with minimum dimension, Reasonable Shape, reaches the loss of weight purpose; The 2nd, rationally select high performance material for use, to use minimum material, reach the loss of weight purpose; The 3rd, adopt whole preparation technology to prepare structural member, to reduce parts, connector quantity, improve the globality and the reliability of structural member simultaneously, reach the loss of weight purpose.
Composite has the excellent comprehensive performance, is used for the molding equipment structure can not only satisfy the functional requirement of structure well, can also effectively reach the lightweight target.In the communications and transportation equipment; Train parts such as composite hood, car door, window frame have successfully been prepared; And passed through the application performance examination, tentatively realized the compositeization of rail traffic vehicles car body, and as the top cover of main load-bearing part and the draw beam materials such as aluminium alloy that still are widely used; Be unfavorable for that light in structure quantizes, therefore be necessary to realize the compositeization of this class A of geometric unitA.
Equipment configuration spares like that such as train top cover and draw beam have the design feature (its structure can referring to Fig. 1) of large scale, many bodies of wall; This class A of geometric unitA not only configuration is complicated; Owing to carry difference, each the metope length in many bodies of wall composite element, thickness are generally different simultaneously.If adopt composite to prepare; Can cause impregnating speed, time and the curing rate of many each metopes of wall body construction to have nothing in common with each other; And owing to have staggered between each metope mutually; The tradition dipping method unavoidably can be in the corner etc. locates to occur the incomplete phenomenons of dipping such as dry spot, hole, and whole preparation moulding difficulty is big.If adopt somatotype preparation, whole glued method to prepare this type of many wall body structures composite element (as shown in Figure 2); Because the discontinuity of fiber and the influence of cement plane in the composite; Be unfavorable for the performance of structural entity bearing behavior, mechanical property is relatively poor.
RTM technology is a kind of technology that adopts the rigidity close die to make composite, and technological principle is as shown in Figure 3.RTM technology is in the mold cavity that formpiston 21 and former 22 are formed, to place reinforcing material preform 23 in advance; After matched moulds clamps; The resin system that under certain temperature and pressure, will mix through static mixer is injected in the mold cavity through the injecting glue pipeline 24 of injecting glue system 25; Vacuum-pumping pipeline (being plastic emitting pipeline 26) by pumped vacuum systems 27 vacuumizes, and makes resin system lay-up preform 23.Because pumped vacuum systems includes the resin gathering-device, vacuum-pumping pipeline can be used as plastic emitting pipeline 26 again, and unnecessary resin adhesive liquid can get in the resin adhesive liquid gatherer through plastic emitting pipeline 26; After curing, the demoulding, finishing obtain composite product.RTM technology has become one of main developing direction of advanced composite material low-cost manufacturing technique because of it has advantages such as product's dimensional precision height, thickness is even, porosity is low, fugitive constituent is few.
Yet; Also there are a lot of technical difficulties in the moulding that existing RTM technology is used for many bodies of wall composite element; In mould design, fiber lay down layer, the demoulding, have very big technical barrier, thereby can't realize the Integratively formed of such many bodies of wall composite element.Therefore, how RTM technology is applied to better the moulding of many bodies of wall composite element, this is to those skilled in the art with significant.
Summary of the invention
The technical problem that the present invention will solve is the deficiency that overcomes prior art; A kind of good integrity, good reliability are provided, mechanical property is good and helps realizing the light-weighted many bodies of wall composite element of equipment configuration, the RTM preparation method of many bodies of wall composite element that a kind of preparation section is few, cost is low, goods integration degree high, process efficiency is high also is provided.
For solving the problems of the technologies described above; The technical scheme that the present invention proposes is a kind of many bodies of wall composite element; Said many bodies of wall composite element mainly is made up of interior wall assembly and exterior wall assembly; Said interior wall assembly and exterior wall assembly are the multi-layer fiber cloth reinforced composite; The matrix material of said multi-layer fiber cloth reinforced composite is unsaturated polyester resin system or epoxy-resin systems, said cloth be carbon cloth or glass fabric (weaving manner of cloth can in woven roving, plain, twill, the satin any one or multiple), the volume fraction of said cloth is 35%～55%; In each of said interior wall assembly between the body of wall, between each outer body of wall of exterior wall assembly and between interior wall assembly and the exterior wall assembly connector is not set all; In each of said interior wall assembly between the body of wall, between each outer body of wall of exterior wall assembly and between interior wall assembly and the exterior wall assembly cement plane is not set all, said many bodies of wall composite element is mainly prepared after one-body molded by interior wall assembly and exterior wall assembly co-curing.
In above-mentioned many bodies of wall composite element; Preferably; Said exterior wall assembly is meant enclosed hollow frame structure (cuboid hollow tubular structures more preferably) especially, and said interior wall assembly is meant the rib shape shear structure (the rib shape shear structure of " V " shape groove shape more preferably) that is fixed on the exterior wall assembly inwall especially.
In above-mentioned many bodies of wall composite element, said interior body of wall is preferably 1 with the thickness ratio of outer body of wall: (1～2).
As a total technical conceive, the present invention also provides a kind of RTM preparation method of above-mentioned many bodies of wall composite element, may further comprise the steps:
(1) mould preparation: according to the shaped design of said many bodies of wall composite element and prepare mold system; Said mold system comprises formpiston and former; Said formpiston and former can be assembled into the die cavity of the said many bodies of wall composite element of moulding; Said former is made up of the former mold members that is laid in the die cavity periphery and is used for many bodies of wall of moulding composite element profile frame, said formpiston by in the space that is laid between the die cavity cavity and the male mold part that is used for many bodies of wall of moulding composite element inside structure form; Said formpiston and former are provided with the preformed hole that is used for assembly unit; Be preset with the hole for injecting glue and the plastic hole that are used for the RTM moulding on the said former;
(2) reinforcing material is covered in the shop: cover reinforcing material according to shop layer design in shop, said male mold part surface;
(3) assembly jig system: when reinforcing material is covered in above-mentioned shop; Through securing member said male mold part is fixed on the said former mold members; And the former mold members is carried out assembly unit through securing member, form the closed die system that coats formpiston by former;
(4) vacuum injecting glue: after the air-tightness of inspection mold system; Prepare resin system; Connect the injecting glue system at said hole for injecting glue place, the place connects pumped vacuum systems in said plastic hole, in the die cavity of mold system, carries out the injection of resin system through the mode of vacuumizing; Finish until resin fill, stop injection;
(5) co-curing moulding: removal said injecting glue system and pumped vacuum systems, said mold system is put into baking oven, carry out the co-curing moulding according to preset curing system; Moulding is after the demoulding, finishing obtain many bodies of wall composite element.
RTM preparation method of the present invention has really realized the once change global formation of many wall body structures composite element, has fully represented the integrated characteristics of composite element design with preparation, has improved the overall performance of composite element product.
Among the above-mentioned RTM preparation method; Preferably; Said former mold members comprises former mold members base plate and the square former mold members top board of a block length that former mold members side plate, a block length of two " L " shapes is square, and said former mold members side plate, former mold members base plate and former mold members top board are assembled into the former of cuboid box-shaped.
Among the above-mentioned RTM preparation method, said male mold part is preferably the male mold part of three straight triangular columns, and said male mold part is formed rectangular-shaped formpiston.
Among the above-mentioned RTM preparation method; Form the exterior wall phantom chamber of cuboid tubulose and the interior wall phantom chamber of " V " shape groove shape behind said former and the formpiston matched moulds; The friendship rib end in said interior wall phantom chamber intersects on the face in exterior wall phantom chamber, and two outer rib ends in said interior wall phantom chamber are intersected in the rib place, two turnings in exterior wall phantom chamber respectively.
Among the above-mentioned RTM preparation method, said hole for injecting glue preferably is arranged on the intersection of the friendship rib end and the said former mold members base plate in said interior wall phantom chamber; Said plastic hole is preferably two, and two plastic holes can be separately positioned on two the outer rib ends in said interior wall phantom chamber and the intersection of said former mold members top board.
In the above-mentioned optimized technical scheme of the present invention, to the shape of former and structure form, the shape and the structure of formpiston form the design of having done special optimization, but the mold members quantity of former and formpiston, shape etc. are not limited to above-mentioned optimized technical scheme.The shape of former can design according to the profile frame of exterior wall assembly in the concrete practice, and formpiston shape and quantity are then mainly determined by interior wall structure.Above-mentioned optimized technical scheme is that the application inventor combines the conventional shape of many bodies of wall composite element and product test result repeatedly; The optimized improvement of having done; It has not only considered the integrated molding of product; And considered the laying of injecting glue system, the laying of pumped vacuum systems and the operating procedure of the follow-up demoulding etc., be that a systematization with remarkable technique effect improves.
Among the above-mentioned RTM preparation method; As further improvement; The demoulding in the said step (5) may further comprise the steps: with said former mold members base plate and former mold members top board removal, perhaps with the whole removals of former, again through securing member at the preformed hole place of formpiston bottom surface or end face an affixed formpiston connecting plate; Side at the formpiston connecting plate connects a draw bar then, through draw bar the formpiston in the said mold system is taken out.
Among the above-mentioned RTM preparation method, said co-curing moulding is meant that preferably the moulding with said interior wall assembly and exterior wall assembly places same mold system and under same curing system, carries out moulding.The curing system of said co-curing moulding preferably is meant: earlier at 30 ℃～70 ℃ following heat preservation solidification 2h～4h, again at 80 ℃～120 ℃ following heat preservation solidification 2h～4h.
Compared with prior art; The invention has the advantages that: the present invention has at first proposed a kind of many bodies of wall composite element that does not have connector, no cement plane and integrated molding; Composite element of the present invention is good integrity, good reliability not only; And mechanical property can be not fully exerted, and this is for realizing that the equipment configuration lightweight is significant.In addition; The present invention also provides a kind of RTM preparation method of many bodies of wall composite element; Really solve the once change global formation problem of this type of composite element, made this advanced person's of RTM composite material process planning can effectively be applied in the preparation process of many bodies of wall composite element.Preparation method of the present invention has advantages such as preparation section is few, cost is low, goods integration degree height, good reliability.In addition, the present invention can require mold system and preform are carried out differential design according to different service conditions, and the product designability is good, helps improving the rigidity and the military service efficient of dissimilar structural members.
Description of drawings
Fig. 1 is the structural representation (space diagram) of many bodies of wall composite element in the embodiment of the invention.
Fig. 2 is the process principle figure that many bodies of wall composite element adopts somatotype preparation, whole gluing method.
Fig. 3 is the process principle figure of existing RTM technology.
Fig. 4 is RTM preparation method's in the embodiment of the invention a process chart.
Fig. 5 is the structural representation of formpiston in the embodiment of the invention.
Fig. 6 is the structural representation of former in the embodiment of the invention.
Sketch map when Fig. 7 covers first reinforcing material for single male mold part in the embodiment of the invention in the shop.
Sketch map when Fig. 8 covers first reinforcing material for single male mold part in the embodiment of the invention in the shop.
Sketch map when Fig. 9 covers first reinforcing material for single male mold part in the embodiment of the invention in the shop.
Figure 10 is the sketch map after the formpiston in the embodiment of the invention is connected to the former mold members.
Sketch map when Figure 11 covers second reinforcing material for the formpiston in the embodiment of the invention in the shop.
Figure 12 is the structural representation of former mold members base plate in the embodiment of the invention.
Figure 13 is the view before the matched moulds in the embodiment of the invention.
Figure 14 is the view behind the matched moulds in the embodiment of the invention.
Figure 15 is for removing the view behind the former in the embodiment of the invention.
Figure 16 is for preparing to remove the preceding view of formpiston in the embodiment of the invention.
Figure 17 is the view when removing formpiston in the embodiment of the invention.
Marginal data:
11. many bodies of wall composite element; 12. interior body of wall; 13. outer body of wall; 2. die cavity; 21. formpiston; 22. former; 23. reinforcing material preform; 24. injecting glue pipeline; 25. injecting glue system; 26. plastic emitting pipeline; 27. pumped vacuum systems; 31. first reinforcing material; 32. second reinforcing material; 33. formpiston bolt hole; 34. male-female mould bolt hole; 35. the moon-former bolt hole; 36. formpiston fastening bolt; 37. former fastening bolt; 41. former mold members base plate; 42. former mold members side plate; 43. former mold members top board; 44. male mold part; 45. hole for injecting glue; 46. plastic hole; 51. exterior wall phantom chamber; 52. interior wall phantom chamber; 53. hand over the rib end; 54. outer rib end; 61. base; 62. support frame; 63. spacing dividing plate; 64. formpiston connecting plate; 65. draw bar.
The specific embodiment
Below in conjunction with Figure of description and specific embodiment the present invention is further described.
Embodiment 1:
A kind of many bodies of wall composite element 11 of the present invention as shown in Figure 1; These many bodies of wall composite element 11 main draw beams as certain model train; Many bodies of wall composite element 11 mainly is made up of interior wall assembly and exterior wall assembly; Interior wall assembly and exterior wall assembly are the multi-layer fiber cloth reinforced composite; The matrix material of multi-layer fiber cloth reinforced composite is unsaturated polyester resin system or epoxy-resin systems (present embodiment is selected 9001 unsaturated polyester resins for use), and cloth is carbon cloth or glass fabric (present embodiment is selected alkali-free glass fibre 04 plain for use), and the volume fraction of cloth is 45%; In each of interior wall assembly between the body of wall 12, between each outer body of wall 13 of exterior wall assembly and between interior wall assembly and the exterior wall assembly connector is not set all; In each of interior wall assembly between the body of wall 12, between each outer body of wall 13 of exterior wall assembly and between interior wall assembly and the exterior wall assembly cement plane is not set all, many bodies of wall composite element 11 is mainly prepared after one-body molded by interior wall assembly and exterior wall assembly co-curing.
In many bodies of wall composite element of present embodiment, the exterior wall assembly is a cuboid tubular structure, and the interior wall assembly is the rib shape shear structure of one " V " shape groove shape.In the present embodiment, the thickness of interior body of wall 12 is 8mm, and the thickness of outer body of wall 13 is 12mm, and interior body of wall 12 is 1: 1.5 with the thickness ratio of outer body of wall 13.
The RTM preparation technology flow process of many wall body structures composite element of above-mentioned present embodiment is as shown in Figure 4, specifically can may further comprise the steps:
1. mould preparation:
According to the shaped design of many bodies of wall of present embodiment composite element 11 and prepare mold system; Consider the continuity of reinforcing material preform 23; The mold system of present embodiment comprises formpiston as shown in Figure 5 21 and former 22 shown in Figure 6; Formpiston 21 and former 22 can be assembled into the die cavity 2 of many bodies of wall of moulding composite element 11; Former 22 is made up of the former mold members that is laid in die cavity 2 peripheries and is used for many bodies of wall of moulding composite element 11 profile frame, formpiston 21 by in the space that is laid between die cavity 2 cavitys and the male mold part 44 that is used for many bodies of wall of moulding composite element 11 inside structures form; Formpiston 21 is provided with the preformed hole that is used for assembly unit with former 22; Be preset with the hole for injecting glue 45 and plastic hole 46 that are used for the RTM moulding on the former 22.
The former mold members comprises the square former mold members base plate 41 and the square former mold members top board 43 of a block length of former mold members side plate 42, a block length of two " L " shapes in the present embodiment, and former mold members side plate 42, former mold members base plate 41 (referring to Figure 12) and former mold members top board 43 (referring to Figure 13) are assembled into the former 22 of cuboid box-shaped.Formpiston mold members 44 is the male mold part of three straight triangular columns in the present embodiment, and three male mold parts 44 are formed rectangular-shaped formpiston 21 (reserving between each male mold part 44 at interval).Form the exterior wall phantom chamber 51 of cuboid tubulose and the interior wall phantom chamber 52 of " V " shape groove shape behind present embodiment former 22 and formpiston 21 matched moulds; The friendship rib end 53 in interior wall phantom chamber 52 intersects on the face in exterior wall phantom chamber 51, and two outer rib ends 54 in interior wall phantom chamber 52 are intersected in the rib place, two turnings in exterior wall phantom chamber 51 respectively.
In the present embodiment, hole for injecting glue 45 is arranged on the intersection of friendship rib end 53 with the former mold members base plate 41 in interior wall phantom chamber 52; Plastic hole 46 is two, and two plastic holes 46 can be symmetricly set on the intersection of two outer rib ends 54 with the former mold members top board 43 in interior wall phantom chamber 52 respectively.
2. reinforcing material is covered in the shop:
Like Fig. 7～shown in Figure 9; Cover first reinforcing material 31 (present embodiment is alkali-free glass fibre 04 plain available from Jiangsu Danyang Zhongya Glass Fiber Co., Ltd.) in each shop, male mold part 44 surface respectively according to shop layer design; Like Fig. 7,8, shown in 9, establishing alkali-free glass fibre 04 plain thickness in monolayer is h
1, interior thickness of wall body is n (present embodiment is 8mm), outer thickness of wall body is m (present embodiment is 12mm), then on each male mold part 44, spreads respectively and covers n/2h
1Layer (present embodiment is 10 layers); At this moment; Can be assembled into each male mold part 44 rectangular-shaped; And (present embodiment is high-strength glass fibre 04 plain available from Jiangsu Danyang Zhongya Glass Fiber Co., Ltd. to cover second reinforcing material 32 in rectangular-shaped formpiston 21 peripheral continuation shops; The main distinction of second reinforcing material 32 and first reinforcing material 31 is: 1. first reinforcing material is that the shop overlays on the single male mold part, and second reinforcing material is to spread to overlay on the male mold assembly; 2. second reinforcing material is the reinforcing material that belongs to outer body of wall fully; And first reinforcing material is body of wall and an outer body of wall reinforcing material in belonging to), the formpiston 21 that then first reinforcing material 31 and second reinforcing material 32 has been covered in the shop is installed on the former mold members.But in the present embodiment; We have adopted a kind of preferred shop to cover mode; That is: after first reinforcing material 31 has been covered in the shop, earlier each male mold part 44 is installed on the former mold members base plate 41, shown in figure 10; And then cover second reinforcing material 32 in the peripheral shop of continuing of rectangular-shaped formpiston 21, establishing high-strength glass fibre 02 plain thickness in monolayer is h
2, the shop coating number of second reinforcing material 32 is (2m-n)/2h
2Layer (present embodiment is 20 layers), shop are shown in figure 11 after covering and accomplishing.
3. assembly jig system:
Like Figure 10～shown in Figure 12; When reinforcing material is covered in above-mentioned shop; We pass on the male mold part 44 the male-female mould bolt hole 34 that is provided with on the formpiston bolt hole 33 that is provided with and the former mold members base plate 41 with formpiston fastening bolt 36, and then male mold part 44 is fixed on the former mold members base plate 41; After completion is covered in the shop of treating second reinforcing material 32; The moon-former the bolt hole 35 that is provided with on the moon-former bolt hole 35 that utilizes former fastening bolt 37 at first to pass on the former mold members side plate 42 again to be provided with and the former mold members base plate 41; Next utilizes former fastening bolt 37 to pass the corresponding the moon-former bolt hole 35 that is provided with on two former mold members side plates 42; The moon-former the bolt hole 35 that is provided with on the moon-former bolt hole 35 that utilizes former fastening bolt 37 to pass on the former mold members side plate 42 again to be provided with and the former mold members top board 43; And then the former mold members carried out assembly unit, form the closed die system that coats formpistons 21 by former 22; State before and after the matched moulds is respectively like Figure 13 and shown in Figure 14.
4. vacuum injecting glue:
Matched moulds and check the air-tightness of mold system after, prepare following resin system: Synolite 9001-I-1 unsaturated polyester resin (available from Nanjing DSM company), Synolite 5002-M-2 promoter (available from Nanjing DSM company) and M50 initator (available from Nanjing DSM company).Connect the injecting glue system at hole for injecting glue 45 places; 46 places connect pumped vacuum systems in the plastic hole; Regulate the measuring equipment in the injecting glue system; Make that the mass ratio of Synolite 9001-I-1 unsaturated polyester resin in the injecting glue process, Synolite5002-M-2 promoter and M50 initator is 100: 1.1: 1.3, obtain resin adhesive liquid after mixing; Open pumped vacuum systems die cavity 2 is vacuumized processing, and keep die cavity vacuum to reach more than the 0.095MPa; Open the injecting glue system then, the resin adhesive liquid of preparing is expelled in the die cavity 2, when 46 places, plastic hole have resin adhesive liquid to overflow, stop injection; Close pumped vacuum systems, stop to vacuumize.
5. co-curing moulding:
Removal injecting glue system and pumped vacuum systems are put into baking oven with mold system, carry out the co-curing moulding according to preset curing system; The co-curing moulding is meant that the moulding with interior wall assembly and exterior wall assembly places same mold system and under same curing system, carries out moulding; The curing system of present embodiment co-curing moulding is meant: earlier at 40 ℃ of following heat preservation solidification 2h, and heat preservation solidification 2h under 80 ℃ of temperature again.
6. subsequent treatment:
The co-curing moulding is carried out the demoulding earlier after accomplishing; The demoulding may further comprise the steps: earlier with former 22 whole removals; Obtain the many bodies of wall composite element 11 that comprises formpiston 21 shown in figure 15, shown in figure 16 then, many bodies of wall composite element 11 is placed on the base 61; Fixing a pair of triangular support framework 62 on base 61; In support frame 62 1 sides a spacing dividing plate 63 is set, and makes many bodies of wall composite element 11 be positioned at the opposite side of spacing dividing plate 63, have the rectangular opening that can supply formpiston 21 to pass in the middle of the spacing dividing plate 63; Shown in figure 17 then; Through formpiston fastening bolt 36 at formpiston bolt hole 33 places of formpiston 21 bottom surfaces (or end face) an affixed formpiston connecting plate 64; Formpiston connecting plate 64 is less than the rectangular opening of offering in the middle of the spacing dividing plate 63; Side at formpiston connecting plate 64 connects a draw bar 65, through draw bar 65 formpiston in the mold system 21 is taken out; After finishing obtains many bodies of wall composite element 11.
Many bodies of wall composite element of present embodiment preparation is as shown in Figure 1, comprises rib-shaped interior wall and rectangle exterior wall, and material system is a matrix with 9001 unsaturated polyester resins all) for strengthening body.This composite element interior wall and exterior wall thickness proportion are 1: 1.5.
Embodiment 2:
A kind of many bodies of wall composite element 11 of the present invention as shown in Figure 1; These many bodies of wall composite element 11 main train top covers as certain model; Many bodies of wall composite element 11 mainly is made up of interior wall assembly and exterior wall assembly; Interior wall assembly and exterior wall assembly are the multi-layer fiber cloth reinforced composite; The matrix material of multi-layer fiber cloth reinforced composite is unsaturated polyester resin system or epoxy-resin systems (present embodiment is selected LT-5089A epoxy resin for use), and cloth is carbon cloth or glass fabric (present embodiment is selected alkali-free glass fibre 04 twill for use), and the volume fraction of cloth is 45%; In each of interior wall assembly between the body of wall 12, between each outer body of wall 13 of exterior wall assembly and between interior wall assembly and the exterior wall assembly connector is not set all; In each of interior wall assembly between the body of wall 12, between each outer body of wall 13 of exterior wall assembly and between interior wall assembly and the exterior wall assembly cement plane is not set all, many bodies of wall composite element 11 is mainly prepared after one-body molded by interior wall assembly and exterior wall assembly co-curing.
In many bodies of wall composite element of present embodiment, the exterior wall assembly is a cuboid tubular structure, and the interior wall assembly is the rib shape shear structure of one " V " shape groove shape.In the present embodiment, the thickness of interior body of wall 12 is 8mm, and the thickness of outer body of wall 13 is 8mm, and interior body of wall 12 is 1: 1 with the thickness ratio of outer body of wall 13.
The RTM preparation method of many wall body structures composite element of above-mentioned present embodiment is as shown in Figure 4, specifically can may further comprise the steps:
1. the step 1 of present embodiment is identical with the step 1 of embodiment 1;
2. the step 2 of present embodiment is basic identical with the step 2 of embodiment 1; Its difference mainly is: first reinforcing material of selecting for use is alkali-free glass fibre 04 twill available from Jiangsu Danyang Zhongya Glass Fiber Co., Ltd.; Second reinforcing material of selecting for use is alkali-free glass fibre 02 plain available from Jiangsu Danyang Zhongya Glass Fiber Co., Ltd., and the shop coating number of second reinforcing material 32 is 20 layers;
3. the step 3 of present embodiment is identical with the step 3 of embodiment 1;
4. the step 4 of present embodiment is basic identical with the step 4 of embodiment 1; Its difference mainly is: the resin system of selecting for use is LT-5089A epoxy resin (available from the sharp resin of favour Co., Ltd) and LT-5089B curing agent (available from the sharp resin of favour Co., Ltd), and the mass ratio of LT-5089A epoxy resin and LT-5089B curing agent is 100:30 in the injecting glue process;
5. the step 5 of present embodiment is basic identical with the step 5 of embodiment 1, and its difference mainly is: the curing system of present embodiment is meant elder generation at 60 ℃ of following heat preservation solidification 2h, again heat preservation solidification 2h under 100 ℃ of temperature;
6. the step 6 of present embodiment is identical with the step 6 of embodiment 1.
Product of the present invention and preparation technology are suitable for the global formation of various complex section structural members such as train top cover and draw beam fully.In concrete the application, can adjust mold shape, preform configuration, reinforcing material and resin system according to demand in practice.Many bodies of wall composite element good integrity of above embodiment preparation; The rigidity of structure is high; Can be widely used in such as in the large-scale loss of weight equipment such as rail traffic vehicles top cover, draw beam and aircraft wing box; Realize high efficiency, high-quality, the low-cost moulding of many bodies of wall composite element, the various equivalent processes schemes of conceiving no substantial differences with the present invention are all in the protection domain of claim of the present invention.
Claims (10)
1. body of wall composite element more than a kind; Said many bodies of wall composite element mainly is made up of interior wall assembly and exterior wall assembly; Said interior wall assembly and exterior wall assembly are the multi-layer fiber cloth reinforced composite; The matrix material of said multi-layer fiber cloth reinforced composite is unsaturated polyester resin system or epoxy-resin systems; Said cloth is carbon cloth or glass fabric; The volume fraction of said cloth is 35%～55%; It is characterized in that: in each of said interior wall assembly between the body of wall, between each outer body of wall of exterior wall assembly and between interior wall assembly and the exterior wall assembly connector is not set all, between the interior body of wall of each of said interior wall assembly, between each outer body of wall of exterior wall assembly and between interior wall assembly and the exterior wall assembly cement plane is not set all, said many bodies of wall composite element is mainly prepared after one-body molded by interior wall assembly and exterior wall assembly co-curing.
2. many bodies of wall composite element according to claim 1 is characterized in that: said exterior wall assembly is enclosed hollow frame structure, and said interior wall assembly is the rib shape shear structure that is fixed on the exterior wall assembly inwall.
3. many bodies of wall composite element according to claim 2 is characterized in that: said exterior wall assembly is the cuboid tubular structure, and said interior wall assembly is the rib shape shear structure of " V " shape groove shape.
4. according to claim 1 or 2 or 3 described many bodies of wall composite elements, it is characterized in that: body of wall is 1 with the thickness ratio of outer body of wall in said: (1～2).
5. RTM preparation method like each described many bodies of wall composite element in the claim 1～4 may further comprise the steps:
(1) mould preparation: according to the shaped design of said many bodies of wall composite element and prepare mold system; Said mold system comprises formpiston and former; Said formpiston and former can be assembled into the die cavity of the said many bodies of wall composite element of moulding; Said former is made up of the former mold members that is laid in the die cavity periphery and is used for many bodies of wall of moulding composite element profile frame, said formpiston by in the space that is laid between the die cavity cavity and the male mold part that is used for many bodies of wall of moulding composite element inside structure form; Said formpiston and former are provided with the preformed hole that is used for assembly unit; Be preset with the hole for injecting glue and the plastic hole that are used for the RTM moulding on the said former;
(2) reinforcing material is covered in the shop: cover reinforcing material according to shop layer design in shop, said male mold part surface;
(3) assembly jig system: when reinforcing material is covered in above-mentioned shop; Through securing member said male mold part is fixed on the said former mold members; And the former mold members is carried out assembly unit through securing member, form the closed die system that coats formpiston by former;
(4) vacuum injecting glue: after the air-tightness of inspection mold system; Prepare resin system; Connect the injecting glue system at said hole for injecting glue place, the place connects pumped vacuum systems in said plastic hole, in the die cavity of mold system, carries out the injection of resin system through the mode of vacuumizing; Finish until resin fill, stop injection;
(5) co-curing moulding: removal said injecting glue system and pumped vacuum systems, said mold system is put into baking oven, carry out the co-curing moulding according to preset curing system; Moulding is after the demoulding, finishing obtain many bodies of wall composite element.
6. RTM preparation method according to claim 5; It is characterized in that: said former mold members comprises former mold members base plate and the square former mold members top board of a block length that former mold members side plate, a block length of two " L " shapes is square, and said former mold members side plate, former mold members base plate and former mold members top board are assembled into the former of cuboid box-shaped.
7. RTM preparation method according to claim 6 is characterized in that: the male mold part that said male mold part is three straight triangular columns, and said male mold part is formed rectangular-shaped formpiston; Form the interior wall phantom chamber of the vasiform exterior wall phantom of cuboid chamber and " V " shape groove shape behind said former and the formpiston matched moulds; The friendship rib end in said interior wall phantom chamber intersects on the face in exterior wall phantom chamber, and two outer rib ends in said interior wall phantom chamber are intersected in the rib place, two turnings in exterior wall phantom chamber respectively.
8. RTM preparation method according to claim 7 is characterized in that: said hole for injecting glue is arranged on the intersection of the friendship rib end and the said former mold members base plate in said interior wall phantom chamber; Said plastic hole has two, and two plastic holes are separately positioned on two the outer rib ends in said interior wall phantom chamber and the intersection of said former mold members top board.
9. RTM preparation method according to claim 8; It is characterized in that; The demoulding in the said step (5) may further comprise the steps: with said former mold members base plate and former mold members top board removal, perhaps with the whole removals of former, again through securing member at the preformed hole place of formpiston bottom surface or end face an affixed formpiston connecting plate; Side at the formpiston connecting plate connects a draw bar then, through draw bar the formpiston in the said mold system is taken out.
10. according to each described RTM preparation method in the claim 5～9, it is characterized in that: said co-curing moulding is meant that the moulding with said interior wall assembly and exterior wall assembly places same mold system and under same curing system, carries out moulding; The curing system of said co-curing moulding is meant: earlier at 30 ℃～70 ℃ following heat preservation solidification 2h～4h, again at 80 ℃～120 ℃ following heat preservation solidification 2h～4h.
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| CN102941722A (en) * | 2012-11-22 | 2013-02-27 | 中国人民解放军国防科学技术大学 | Flame-retardant corrosion-resistant case material, resin transfer molding (RTM) technique thereof and injection molding system |
| CN105252792A (en) * | 2015-11-30 | 2016-01-20 | 江苏恒神股份有限公司 | Autoclave die for forming parts with reinforcing ribs |
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