CN109968688A - A kind of fiber hot pressing can deformation mold - Google Patents

A kind of fiber hot pressing can deformation mold Download PDF

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Publication number
CN109968688A
CN109968688A CN201711440926.2A CN201711440926A CN109968688A CN 109968688 A CN109968688 A CN 109968688A CN 201711440926 A CN201711440926 A CN 201711440926A CN 109968688 A CN109968688 A CN 109968688A
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CN
China
Prior art keywords
mold
slide
hot pressing
sliding
plate
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Granted
Application number
CN201711440926.2A
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Chinese (zh)
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CN109968688B (en
Inventor
张洪生
祝颖丹
涂丽艳
陈刚
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Ningbo Institute of Material Technology and Engineering of CAS
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Ningbo Institute of Material Technology and Engineering of CAS
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Priority to CN201711440926.2A priority Critical patent/CN109968688B/en
Publication of CN109968688A publication Critical patent/CN109968688A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/02Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/42Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/44Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/30Shaping 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
    • B29C70/34Shaping 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
    • B29C70/345Shaping 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 matched moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/54Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing

Abstract

It can deformation mold the invention discloses a kind of fiber hot pressing, including the upper die and lower die being oppositely arranged, the top edge of the left and right sides of lower die is fixedly installed slide unit respectively, on two slide units respectively slip have one can to inward-outward direction level slide the first slide plate, in be provided on each first slide plate one can longitudinal sliding motion the second slide plate;Two sides on the concave inward structure bottom surface of lower mould surface are respectively arranged with one block of sliding mould plate, and two pieces of sliding mould plate mirror-image arrangements and the side towards upper mold are respectively formed the first inclined-plane, and the two sides of upper mold lower part are respectively formed the second inclined-plane to fit with the first inclined-plane.Its technical solution is able to solve flanging difficult forming present in continuous fiber compression molding, flanging plays decorative pattern difficult forming, demoulding difficult problem, the shaped piece continuous fiber molded member big suitable for small lower end suitable for reading.

Description

A kind of fiber hot pressing can deformation mold
Technical field
The present invention relates to resin fibre field shaping techniques more particularly to a kind of fiber hot pressing can deformation mold.
Background technique
Continuous resin fibre forming method mainly has at present: die pressing, hand molding, vacuum bag pressure sintering, filament winding process, Formed by extrusion and tension method.Resin fibre shaping mould platen press is mainly that staple fiber and long and short fiber add resin forming hair to be widely used, and is set It is higher than the performance of staple fiber resin molding part in the performance of rouge continuous fiber molded part, but due to the limitation of continuous fiber, at Type part contour structures are simple, can only form simple shape, especially for the big shaped piece continuous fiber mould in small lower end suitable for reading Molded part, there is also flanging difficult forming, flanging plays decorative pattern difficult forming, demoulding difficult problem.
Summary of the invention
For the above-mentioned problems in the prior art, one kind is now provided and is intended to be able to solve in continuous fiber compression molding Existing flanging difficult forming, flanging rise decorative pattern difficult forming, demoulding difficult problem fiber hot pressing can deformation mold, to gram Take above-mentioned technological deficiency.
Specific technical solution is as follows:
A kind of fiber hot pressing can deformation mold, including the upper die and lower die being oppositely arranged, the top of the left and right sides of lower die Edge is fixedly installed slide unit respectively, and slipping respectively on two slide units has first slide plate that can be slided to inward-outward direction level, in Be provided on each first slide plate one can longitudinal sliding motion the second slide plate;
Two sides on the concave inward structure bottom surface of lower mould surface are respectively arranged with one block of sliding mould plate, two blocks of sliding mould plates Mirror-image arrangement and side towards upper mold is respectively formed the first inclined-plane, the two sides of upper mold lower part are respectively formed to fit with the first inclined-plane The second inclined-plane;
Also, the function end of at least one the first power source is respectively fixedly connected on the outside of two the first slide plates, two The upper surface of second slide plate is respectively fixedly connected with the function end of at least one the second power source.
Preferably, offering multiple long strip type through slots parallel with the second inclined-plane, each long strip type through slot in upper mold Finite place piece is inside accommodated, the head end of each locating part is pierced by the second inclined-plane and is fixedly linked with sliding mould plate, and limits Part can be slided along long strip type through slot.
Preferably, the mould side that faces upward on sliding mould plate is formed with the first longitudinally disposed confined planes, the two sides Yu Shangmo With first abutment face opposite with the first confined planes position.
Preferably, the upper surface of sliding mould plate is formed with horizontally disposed second confined planes, the following table of the two sides Yu Shangmo Face is formed with second abutment face opposite with the second confined planes position.
Preferably, lower die be internally provided with multiple groups heating and cooling hole, and heat cooling hole through lower die front end face with Rear end face is also possible to be arranged in through the direction of left and right side.
Preferably, being provided with multiple groups heating and cooling hole on two sliding mould plates, and cooling hole is heated through sliding The front end face and rear end face of Die and mould plate.
Preferably, slide unit is equipped with sliding rail, the first slide plate lower end is equipped with and the joining sliding sleeve of sliding rail.
Preferably, the first power source is set on slide unit.
Preferably, being additionally provided with the longitudinally arranged locating slide rod of multiple groups on the first slide plate, locating slide rod and setting are second Multiple groups sliding sleeve on slide plate matches.
Preferably, the first power source and the second power source are oil cylinder or electric cylinders, and the output bar portion of oil cylinder is as function end.
The beneficial effect of above-mentioned technical proposal is:
Fiber hot pressing can deformation mold include the upper die and lower die being oppositely arranged, the fixed setting of lower die top edge two sides is slided Platform slips the first slide plate on two slide units respectively, the second slide plate is arranged on the first slide plate;It is arranged in the concave inward structure of lower mould surface and slides Moving mold plate makes it possible to reduce upper mold or goes back master mould, solves to demould difficult, lower die present in continuous fiber compression molding Slide unit is fixedly installed in top edge two sides, slips the first slide plate on two slide units respectively, the second slide plate, which is arranged, on the first slide plate to solve Certainly flanging difficult forming, flanging play decorative pattern difficult forming, demoulding difficult problem, and are equally applicable to the big abnormity in small lower end suitable for reading Part continuous fiber molded member.
Detailed description of the invention
Fig. 1 be fiber hot pressing of the present invention can deformation mold perspective view;
Fig. 2 be fiber hot pressing of the present invention can deformation mould part structure stereo amplification figure.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention Apply 1 to 2 pair of attached drawing of example combination fiber hot pressing provided by the invention can deformation mold be specifically addressed.
Refering to fig. 1, for fiber hot pressing can deformation mold perspective view;It is that fiber hot pressing can deformation mould part in conjunction with Fig. 2 The stereo amplification figure of structure.And the direction for defining lower die open as shown in Figure 1 is the front and back extreme direction in the present embodiment, face To and away from upper mold direction (i.e. using lower die front end as the left and right directions of positive direction) be respectively the present embodiment inward-outward direction.
Fiber hot pressing provided by the invention can deformation mold include the upper mold 2 and lower die 1 being oppositely arranged, and lower die 1 is whole Cross section in U shape and the whole cross section of upper mold 2 is in " convex " font, the top edge of the left and right sides of lower die 1 is solid respectively Surely it is provided with slide unit 13, and sliding the first slide plate 5 for thering is one can slide to inward-outward direction level respectively on two slide units 13, in every Be provided on a first slide plate 5 one can longitudinal sliding motion the second slide plate 4;Two sides on the concave inward structure bottom surface on 1 surface of lower die It is respectively arranged with one block of sliding mould plate 3, two pieces of 3 mirror-image arrangements of the sliding mould plate and side towards upper mold 2 is respectively formed first Inclined-plane (does not go out) in figure, and the two sides of 2 lower part of upper mold are respectively formed the second inclined-plane (not shown) to fit with the first inclined-plane;
The outside of two the first slide plates 5 is respectively fixedly connected with the function end of at least one the first power source 8, to drive Its inward-outward direction sliding horizontal relative to slide unit 13, the upper surface of two the second slide plates 4 has been respectively fixedly connected at least one The function end of second power source 9, to the sliding for driving it longitudinal relative to the first slide plate 5.
In a preferred embodiment, lower die 1 is internally provided with multiple groups heating and cooling hole 11, and heats cooling hole 11 run through the front end face and rear end face of lower die 1, cold to be heated and be switched fast to mold by high-pressure water heating and water flowing But.Further, slide unit 13 be equipped with sliding rail, 5 lower end of the first slide plate be equipped with the joining sliding sleeve of sliding rail, be convenient for the first slide plate 5 slide relative to sliding rail.Further, the first power source 8 is set on slide unit 13, and the first power source 8 pushes the first slide plate 5 to do Horizontal direction moves left and right locking and release, and locking makes the first slide plate 5 become mold a part, release then to deviate from part with it is upper Mould 2 concedes space, convenient for demoulding.Further, the longitudinally arranged locating slide rod 10 of multiple groups is additionally provided on the first slide plate 5, it is fixed Position slide bar 10 match with the multiple groups sliding sleeve being arranged on the second slide plate 4 so that the second power source 9 promotion the second slide plate 4 along Sliding sleeve and locating slide rod 10 cooperate it is for vertical movement, move down as mold a part, move up abjection product.Wherein, above-mentioned One power source 8 and the second power source 9 can be used oil cylinder or electrodynamic source, the output bar portion of oil cylinder as above-mentioned function end, this Outside, more rod oil cylinders or electric pushrod can be used as power source.
In concrete application, the first slide plate 5 is locked the second slide plate 4 by mold direction and is vertically moved down, the port work of the second slide plate 4 It is processed into different shape as face, fibre is made to be pressed and molded out flanging with vertical decorative pattern of different shapes.Second slide plate 4 hangs down It directly moves up and the first slide plate 5 moves horizontally outward, disengageding mould makes product part have demoulding space.
Embodiment as a further preference offers multiple long strip types parallel with the second inclined-plane in upper mold 2 Through slot 6 is equipped with a locating part 7 in each long strip type through slot 6, and the head end of each locating part 7 is pierced by the second inclined-plane simultaneously It is fixedly linked with sliding mould plate 3, and locating part 7 can be slided along waist type through slot 6.So that longitudinal spacing sliding mould plate 3 exists Upper mold 2 vertically moves.Further, it is provided with multiple groups heating and cooling hole 12 on two sliding mould plates 3, and heats cooling The front end face and rear end face of sliding mould plate 3 are run through in hole 12, are switched by high-pressure water heating and cooling water, realize mold fast heating It is cooling, realize product rapid shaping and demoulding.Further, on sliding mould plate 3 face upward 2 side of mould be formed with it is longitudinally disposed The first confined planes 16,2 two sides Yu Shangmo have first abutment face 15 opposite with 16 position of the first confined planes, to place restrictions on cunning Extreme position of the moving mold plate 3 relative to 2 slide downward of upper mold, mold are contracted to the limit.Further, sliding mould plate 3 Upper surface is formed with horizontally disposed second confined planes 18, and the lower surface of 2 two sides Yu Shangmo is formed with and the second confined planes 18 The second opposite abutment face 17 is set, to place restrictions on the extreme lower position of the pushing of upper mold 2, becomes full die shape.Furthermore locating part It is preferred that using spacer pin.
In concrete application, locating part 7 can be slided along 2 bevel direction of upper mold, by lifting force in upper mold 2, and under passing through Mould 1, which has slide plate, to be stopped, and sliding mould plate 3 has inclined-plane slide downward along upper mold 2, and upper mold 2 has width direction and reduces, and disengages system Product, abjection lower die 1 have.First confined planes 16 of sliding mould plate 3 are in corresponding with the first abutment face 15 of upper mold 2 and are adjacent to shape State, contracted position are fixed, and mold reduces sizing, are pushed by upper mold 2, and sliding mould plate 3 has inclined-plane along upper mold 2 and slides up Dynamic, upper mold 2 has width direction and opens, and the tool of upper mold 2 expands, the second confined planes 18 of sliding mould plate 3 and upper mold 2 second against Face 17 is in correspondence and is adjacent to state, and upper mold 2 becomes product cavity shape, becomes complete upper mold 2 and has.And two sliding mould plates 3 It is symmetrical arranged with upper mold 2.
Based on the above-mentioned technical proposal, fiber hot pressing can deformation mold include the upper mold 2 and lower die 1 being oppositely arranged, in lower die 1 Slide unit 13 is fixedly installed in both sides of edges, slips the first slide plate 5 on two slide units 13 respectively, the second slide plate 4 is arranged on the first slide plate 5; The two sides being arranged on the convex configuration bottom surface of sliding mould plate 3 in other words in the concave inward structure on 1 surface of lower die are respectively arranged with One block of sliding mould plate 3, the position limitation of 18 position of the first 16 second confined planes of confined planes, forms and reduces and restore upper mold, make Flanging difficult forming present in continuous fiber compression molding must be able to solve, flanging plays decorative pattern difficult forming, demoulding difficulty is asked Topic, 2 lower surface of upper mold and is equally applicable to the big shaped piece continuous fiber molded member in small lower end suitable for reading.
The foregoing is merely presently preferred embodiments of the present invention, is merely illustrative for the purpose of the present invention, and not restrictive 's.Those skilled in the art understand that in the spirit and scope defined by the claims in the present invention many changes can be carried out to it, It modifies or even equivalent, but falls in protection scope of the present invention.

Claims (10)

1. a kind of fiber hot pressing can deformation mold, including the upper mold (2) and lower die (1) being oppositely arranged, which is characterized in that under described The top edge of the left and right sides of mould (1) is fixedly installed slide unit (13) respectively, and slipping respectively on two slide units (13) has one The first slide plate (5) that can be slided to inward-outward direction level, can longitudinal sliding motion in being provided with one on each first slide plate (5) The second slide plate (4);
Two sides on the convex configuration bottom surface on upper mold (2) surface are respectively arranged with one piece of sliding mould plate (3), described in two pieces Sliding mould plate (3) mirror-image arrangement and side towards the upper mold (2) is respectively formed the first inclined-plane, upper mold (2) lower part Two sides are respectively formed the second inclined-plane to fit with first inclined-plane;
Also, the function of at least one the first power source (8) is respectively fixedly connected on the outside of two first slide plates (5) End, the upper surface of two second slide plates (4) is respectively fixedly connected with the function end of at least one the second power source (9).
2. fiber hot pressing as described in claim 1 can deformation mold, which is characterized in that offered in the upper mold (2) multiple The long strip type through slot (6) parallel with second inclined-plane, each long strip type through slot (6) is interior to be equipped with a limit Part (7), the head end of each locating part (7) are pierced by second inclined-plane and are fixedly linked with the sliding mould plate (3), And the locating part (7) can be slided along the long strip type through slot (6).
3. fiber hot pressing as claimed in claim 2 can deformation mold, which is characterized in that on the sliding mould plate (3) towards Upper mold (2) side is formed with longitudinally disposed the first confined planes (16), and Yu Suoshu upper mold (2) two sides have and described first Opposite the first abutment face (15) in confined planes (16) position.
4. fiber hot pressing as claimed in claim 3 can deformation mold, which is characterized in that the upper end of the sliding mould plate (3) Face is formed with horizontally disposed second confined planes (18), and the lower surface of Yu Suoshu upper mold (2) two sides is formed with and second limit Opposite the second abutment face (17) in plane (18) position.
5. fiber hot pressing as described in claim 1 or 4 can deformation mold, which is characterized in that the lower die (1) is internally provided with Multiple groups heating and cooling hole (11), and heating cooling hole (11) runs through the front end face and rear end face of the lower die (1).
6. fiber hot pressing as claimed in claim 5 can deformation mold, which is characterized in that on two sliding mould plates (3) It is provided with multiple groups heating and cooling hole (12), and heating cooling hole (12) runs through the front end of the sliding mould plate (3) Face and rear end face.
7. fiber hot pressing as claimed in claim 5 can deformation mold, which is characterized in that the slide unit (13) is equipped with sliding rail, First slide plate (5) lower end is equipped with and the joining sliding sleeve of the sliding rail.
8. fiber hot pressing as claimed in claim 7 can deformation mold, which is characterized in that first power source (8) is set to On the slide unit (13).
9. fiber hot pressing as claimed in claim 8 can deformation mold, which is characterized in that also set up on first slide plate (5) There are the longitudinally arranged locating slide rod of multiple groups (10), the locating slide rod (10) and the multiple groups being arranged on second slide plate (4) Sliding sleeve matches.
10. fiber hot pressing as claimed in claim 8 can deformation mold, which is characterized in that first power source (8) and second Power source (9) is oil cylinder or electrodynamic source, and the bar portion of the oil cylinder or electrodynamic source is as the function end.
CN201711440926.2A 2017-12-27 2017-12-27 Fiber hot-pressing deformable mold Active CN109968688B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201711440926.2A CN109968688B (en) 2017-12-27 2017-12-27 Fiber hot-pressing deformable mold

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CN109968688A true CN109968688A (en) 2019-07-05
CN109968688B CN109968688B (en) 2020-11-24

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4802948A (en) * 1985-01-17 1989-02-07 Ford Motor Company Apparatus for producing interior trim component for a motor vehicle
US5874033A (en) * 1997-02-05 1999-02-23 Owens Corning Fiberglas Technology, Inc. Process for preparing a laminar structure
CN102581141A (en) * 2012-03-22 2012-07-18 苏州工业园区金鑫模具制造有限公司 Mold with swing type stripping structure
CN103552252A (en) * 2013-10-25 2014-02-05 中国电子科技集团公司第三十九研究所 Manufacture method of high-precision carbon fiber composite antenna panel
DE102013004962A1 (en) * 2012-09-21 2014-03-27 Audi Ag Method for manufacturing fiber-reinforced plastic component for vehicle chassis, involves melting plastic material of carrier film, by impregnating and hardening semi-finished fiber product
CN104349880A (en) * 2012-06-12 2015-02-11 三菱丽阳株式会社 Molding method for fiber-reinforced plastic structure, and vehicle wheel
CN104385627A (en) * 2014-10-14 2015-03-04 山东大学 Advanced resin-based composite material with anti-lightning surface function layer, and preparation method thereof
CN104918771A (en) * 2013-01-17 2015-09-16 宝马股份公司 Body structural element and method for producing a body structural element
CN105682905A (en) * 2013-10-30 2016-06-15 赢创罗姆有限公司 Continuous production of profiles in a sandwich type of construction with foam cores and rigid-foam-filled profile
CN107310082A (en) * 2016-04-26 2017-11-03 上海怡鑫碳纤维复合材料有限公司 The method for making air passenger seat carbon fibre composite product

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4802948A (en) * 1985-01-17 1989-02-07 Ford Motor Company Apparatus for producing interior trim component for a motor vehicle
US5874033A (en) * 1997-02-05 1999-02-23 Owens Corning Fiberglas Technology, Inc. Process for preparing a laminar structure
CN102581141A (en) * 2012-03-22 2012-07-18 苏州工业园区金鑫模具制造有限公司 Mold with swing type stripping structure
CN104349880A (en) * 2012-06-12 2015-02-11 三菱丽阳株式会社 Molding method for fiber-reinforced plastic structure, and vehicle wheel
DE102013004962A1 (en) * 2012-09-21 2014-03-27 Audi Ag Method for manufacturing fiber-reinforced plastic component for vehicle chassis, involves melting plastic material of carrier film, by impregnating and hardening semi-finished fiber product
CN104918771A (en) * 2013-01-17 2015-09-16 宝马股份公司 Body structural element and method for producing a body structural element
CN103552252A (en) * 2013-10-25 2014-02-05 中国电子科技集团公司第三十九研究所 Manufacture method of high-precision carbon fiber composite antenna panel
CN105682905A (en) * 2013-10-30 2016-06-15 赢创罗姆有限公司 Continuous production of profiles in a sandwich type of construction with foam cores and rigid-foam-filled profile
CN104385627A (en) * 2014-10-14 2015-03-04 山东大学 Advanced resin-based composite material with anti-lightning surface function layer, and preparation method thereof
CN107310082A (en) * 2016-04-26 2017-11-03 上海怡鑫碳纤维复合材料有限公司 The method for making air passenger seat carbon fibre composite product

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