CN106003753A - Method for preparing workpiece with complex inner cavity - Google Patents
Method for preparing workpiece with complex inner cavity Download PDFInfo
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- CN106003753A CN106003753A CN201610313430.8A CN201610313430A CN106003753A CN 106003753 A CN106003753 A CN 106003753A CN 201610313430 A CN201610313430 A CN 201610313430A CN 106003753 A CN106003753 A CN 106003753A
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- core
- resin
- fiber
- liquid
- continuous
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Classifications
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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
-
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
Abstract
The invention discloses a method for preparing a workpiece with a complex inner cavity. The method for preparing the workpiece with the complex inner cavity is characterized by comprising the steps that a, continuous fibers presoaked with resin are wound on the surface of a mold core wrapped with an isolating membrane under the room temperature, or resin-presoaked continuous fiber materials are laid on the surface of a mold core wrapped with an isolating membrane in a covering mode to obtain a mode core wrapped with a prefabricated body; b, the mold core wrapped with the prefabricated body is placed into a mould, and the mold core and the prefabricated body are mutually separated in a sealed mode by utilization of a sealant and the isolating membrane; c, the prefabricated body is subjected to curing molding under the conduction of curing; and d, after composing material of the mold core is heated to be melt into a liquid state, compressed air is applied to discharge the liquid state mold core in the cavity of the composite workpiece, cooling and demoulding are conducted, residues of the mold core and the isolating membrane are removed from the cavity, and the workpiece with the complex inner cavity is obtained. The method for preparing the workpiece with the complex inner cavity can be used for preparing various continuous-fiber-reinforced composite workpieces with complex inner cavity structures.
Description
Technical field
The present invention relates to technical field prepared by complicated inner cavity product, be specifically related to one and prepare
The method of complicated inner cavity product.
Background technology
The polymer matrix composites product of continuous lod has higher specific strength and than just
Degree, has in fields such as Aero-Space, oil pipeline, high-pressure bottle, civilian sports equipments
Increasingly it is widely applied.The polymer matrix composites product preparation method of continuous lod
Mainly have: lay-up molding, Wrapping formed, the also 3D printing technique etc. of newly-developed.Twine
It is mainly used in pipeline, container or the complicated preparation containing cored structure part, such as oil transportation around forming method
The blade of pipeline, gas cylinder, boats and ships or helicopter, civilian light hollow equipment such as turn
Cane, club, bicycle rack etc., generally will press winding direction and the work of design after fiber prepreg
Skill is wrapped in a core or center material (such as foam), and core or center material give and twining
Net shape after fiber solidifying, is subsequently cured and obtains composite product, then the demoulding takes off
Except core obtains hollow product, or retain center material and continuous fiber reinforced composite materials system
Part becomes product jointly.Lay-up molding is then to be coated with continuous-filament woven fabric or prepreg in one
On individual model face and pre-manufactured model (core or center-fill material), obtain precast body, then profit
Composite product is obtained by RTM technique or prepeg process.
But the product that preparation has complicated inner cavity structure encounters insoluble problem, main
If the core of labyrinth can cause cannot the problem of the demoulding, therefore, it is difficult to it is multiple to prepare inner chamber
Miscellaneous as inner chamber has long pipeline configuration or has the composite product of zigzag structure.
A kind of existing technology is application water-soluble core, and this core can be after composite molding
Utilize water-soluble method to remove, but unavoidably bring that dissolution velocity is slow, core material not
Reusability, environmental pollution, dissolution process can affect that composite product performance etc. is many asks
Topic.
To sum up, in order to avoid problem above, need the core removal methods that development is novel, and
Available this technology preparation has the composite product of complicated inner cavity structure.
Summary of the invention
It is an object of the invention to provide a kind of method preparing complicated inner cavity product, i.e. use
A kind of is on-deformable hard solid under the heat curing temperature of composite, and is exceeding
The material of liquid is become as core material after this temperature 30 DEG C～100 DEG C, the most permissible
Core is wound around or paving becomes the composite preform of preformed shape, at forming temperature and
Can well keep precast construction shape under pressure, solidified heat up again 30 DEG C～100 DEG C with
Upper core can be heated becomes liquid, can discharge inner chamber, and thus prepared have complicated inner cavity
Composite product.
For achieving the above object, the present invention provides a kind of method preparing complicated inner cavity product, its
Being characterised by, the method includes: under a, room temperature, the continuous fiber of pre-soaked resin is wrapped in bag
It is wrapped with the whose surfaces of isolating membrane, or continuous fiber resin prepreg material is coated with is being enclosed with isolation
The whose surfaces of film, obtains being enclosed with the core of precast body；B, the type of precast body will be enclosed with
Core is put in mould, utilizes fluid sealant and isolating membrane to make core and precast body seal against each other isolation；
C, at curing temperatures by precast body curing molding, obtain curing molding product；D, it is warming up to
After core constituent material is fused into liquid, applies compressed air and discharge curing molding product intracavity
Become the core of liquid, cooling and demolding, remove core and the isolating membrane of intracavity residual, answered
Miscellaneous inner chamber product.
Preferably, step d is replaced with: d ', cooling and demolding, be warming up to core constituent material
After being fused into liquid, pour out core or apply the one-tenth of compressed air discharge curing molding product intracavity
For the core of liquid, remove core and the isolating membrane of intracavity residual, obtain complicated inner cavity product.
Preferably, connect described in the continuous fiber of described pre-soaked resin and/or continuous fiber resin
Continuous fiber be in carbon fiber, glass fibre, aramid fiber and polyimide fiber at least
One, described resin is selected from epoxy resin, unsaturated polyester (UP), benzoxazine resin and span
At least one in bismaleimide resin.
Preferably, described isolating membrane is politef nonporous film, and described fluid sealant is silicon rubber
Glue.
Preferably, described operation pressure is 0.4-1 MPa, and described solidification temperature is 100-200 DEG C.
Preferably, described core constituent material is hard solid under described solidification temperature, at height
Become flowable liquid in this solidification temperature 30～more than 100 DEG C, and the viscosity of this liquid is less than
1000Pa.s.The constituent material of core of the present invention includes the low melting point (knot such as little molecule
Brilliant melted) and low flow temperature (after being higher than glass transition temperature certain value such as glass state material
Become flowable liquid).
Preferably, the resin in the continuous fiber of described pre-soaked resin and/or continuous fiber resin
For bimaleimide resin, core constituent material is solid for hard at 180 DEG C or less than 200 DEG C
Body, higher than these 180 DEG C or more than 30～100 DEG C of 200 DEG C and less than precast body heat distortion temperature
The flowable liquid of Shi Chengwei, viscosity is less than 1000Pa.s.
Preferably, the resin in the continuous fiber of described pre-soaked resin and/or continuous fiber resin
For epoxy resin, core constituent material is hard solid below 120 DEG C, in 150～200 DEG C
A certain temperature more than become flowable liquid, and the viscosity of this liquid is less than 1000Pa.s.
Preferably, the resin in the continuous fiber of described pre-soaked resin and/or continuous fiber resin
For epoxy resin, core constituent material is hard solid below 180 DEG C, in 210～250 DEG C
A certain temperature more than become flowable liquid, and the viscosity of this liquid is less than 1000Pa.s.
Preferably, described core constituent material is polyether-ether-ketone, the crystallization of this core constituent material
Melt temperature is 140～145 DEG C, and at 160 DEG C or 180 DEG C, viscosity is less than 1000Pa.s；Or,
Described core constituent material is modified polyarylether ketone copolymers, and crystalline melt temperature is 200 DEG C,
It it is flowable liquid when 250 DEG C；Or, described core constituent material is that fusing point is less than 220 DEG C
Low-melting-point metal blend.
The inventive method has the advantage that
The core of technical scheme is to apply a kind of composite curing molding temperature
Under there is certain mechanical strength and the core material that easily removes after heating up, in curing molding temperature
Lower can keep composite inner-cavity structure well with this core material, and the rear profile core that heats up
Material can be discharged from inner chamber, therefore can be used to prepare the composite system of complicated cavity structure
Part, it is to avoid complex core can not the problem of the demoulding, make up the deficiency of Conventional processing methods.
For traditional handicraft preparation, there is answering of tortuous or erose complicated cavity structure
The difficulty of condensation material product, proposes in conjunction with rigidity at a temperature of composite curing molding
The method that after intensification, fusible core prepares this kind of composite product, prepreg is this
On core, laying or winding obtain precast body, can be good at a temperature of composite curing molding
Keep its shape and inner-cavity structure, and improve further to less than composite thermal deformation temperature
Core can be removed when spending simply, have prepare quickly and easily have various have multiple
The advantage of the composite product of the continuous lod of miscellaneous cavity structure.
Advantages of the present invention and feature are, first, and can prepare and various there is complicated cavity
The composite product of the continuous lod of structure；Second, decore speed soon, produce effect
Rate is high；3rd, coremaking is easy and speed fast, prepared by available pouring procedure；4th, inner chamber
Structure keeps good.
Detailed description of the invention
Following example are used for illustrating the present invention, but are not limited to the scope of the present invention.
Embodiment 1:
The implementation process of the present embodiment technical scheme is as follows:
(1-1) by core material die casting in bulk, then the method that is machined into is processed into spiral
Shape；Or directly core material high temperature extrusion is injected into the mould with spiral type cavity
In, obtain spiral-shaped core after cooling and demolding.Again at core outer wrapping one strata tetrafluoro
The nonporous film of ethylene, seals.
(1-2) under room temperature, the continuous carbon fibre of preimpregnation intermediate temperature setting epoxy resin is wrapped in
State the nonporous film surface of the politef of core, obtain composite preform, then put
Enter in mould；The politef nonporous film at core two ends is sealed on the mould wall, closes
Mould, be warming up to 120 DEG C and regulation pressure and make precast body curing molding under the time；Subsequently
It is warming up to 160 DEG C or 180 DEG C, squeezes into compressed air from the fluid injection/gas injection valve of mould, from separately
One goes out liquid/valve of giving vent to anger and discharges the core material extruded by compressed air, finally closes out
Liquid/valve of giving vent to anger；It is cooled to 60 DEG C or 40 DEG C or 70 DEG C, the demoulding, pull politef
Nonporous film, along the core of band pull-out composite product internal residual, obtains forming
There is the continuous carbon fibre reinforced epoxy based composites product of spiraled cavity.
(1-3) core material used by is the polyether-ether-ketone of crystallization, and crystalline melt temperature is
140～145 DEG C, at 160 DEG C or 180 DEG C, viscosity is less than 1000Pa.s.
The continuous carbon fibre reinforced epoxy base that the present embodiment has obtained having spiraled cavity is multiple
Condensation material product, core material is good mechanical properties when less than crystalline melt temperature, and melts
Can discharge after melting, and can Reusability, have only to after the demoulding pull out politef atresia
Thin film can completely remove the core of residual, it is not necessary to extra process, convenient and swift, and type
Core material can directly reclaim Reusability, is not required to complex process and without waste.
Embodiment 2:
The implementation process of the present embodiment technical scheme is as follows:
(2-1) core material being warming up to 280 DEG C, injection enters into a prefabricated hollow shape
For in flexuose polyimide seal bag, obtain being cladded with polyimide seal bag, interior for type
The core of core material.Again at the nonporous film of core outer wrapping one strata tetrafluoroethene, close
Envelope.
(2-2) under room temperature by preimpregnation High Temperature Curing Epoxy Resin System or benzimidazole dihydrochloride unidirectional continuously
Carbon fiber or glass fibre prepreg are coated with the nonporous film of the politef at above-mentioned core
Surface, places in mould, is exported by the polyimide seal bag at core two ends fixing and close
Seal to and connect on valve, it is ensured that air insulated between core and composite preform, simultaneously
The bleeding point evacuation that composite preform side is reserved, is warming up to 180 DEG C, in regulation
Autoclave molding is carried out under pressure and temperature；After having solidified, rise high-temperature to 250 DEG C, this
Time core become flowable viscous liquid, viscosity is 500Pa.s, in composite product
Chamber is passed through compressed air, discharges the liquid core in inner chamber；Take out multiple within being cooled to 100 DEG C
Condensation material product also takes out isolating membrane and the core of internal residual, and obtain forming has it
The continuous carbon fibre reinforced epoxy based composites product of font cavity, or benzimidazole dihydrochloride
The continuous carbon fibre of base or glass fiber compound material product.
(2-3) core material used by is modified polyarylether ketone copolymers, crystalline melt temperature
It is 200 DEG C, is flowable liquid when 250 DEG C, nonpoisonous and tasteless, good mechanical properties.
Embodiment 3:
The implementation process of the present embodiment technical scheme is as follows:
(3-1) prepare a prefabricated hollow and be shaped as the high-temperature nylon sealing bag of U-shaped；Will
Core material is warming up to 260 DEG C, and injection enters in the cavity that this high-temperature nylon seals bag,
To the core being cladded with high-temperature nylon sealing bag；Again at core outer wrapping one strata tetrafluoroethene
Nonporous film, seals；
(3-2) under room temperature by unidirectional continuous carbon fibre or glass fiber winding at above-mentioned core
The nonporous film surface of politef, sizing obtains composite preform, places into mould
In tool, the sealed nylon bag at core two ends exported fixing and is tightly connected on valve, and protecting
Air insulated between pattern of syndrome core and composite preform, simultaneously composite preform side
Reserved bleeding point evacuation, is warming up to 110 DEG C, injects hot setting ring by RTM technique
Epoxy resins (the highest solidification temperature 180 DEG C) or bimaleimide resin, injected rear and pressed
Program curing solidifies；Take out the composite product with core after cooling, rise subsequently
Temperature to 230 DEG C or 250 DEG C, wherein bismaleimide resin based composites can be warming up to 280 DEG C will not
Thermal deformation, now core becomes liquid, squeezes into compression sky from composite inner chamber one side outlet
Gas, discharges the core material extruded by compressed air, to not having liquid from another outlet
Flow out；It is cooled to less than 60 DEG C again, the demoulding, pull nonporous film or the Buddhist nun of politef
Dragon seals bag, along the core of band pull-out composite product internal residual.Obtain forming
There is continuous carbon fibre reinforced epoxy base or the bismaleimide resin base composite wood of U-shaped cavity
Material product, or corresponding glass fiber compound material product；
(3-3) above step is applicable to all 180 DEG C and has when choosing corresponding core material
Higher force intensity, and the core material that 230 DEG C or 250 DEG C become liquid, such as a kind of eutectic
Point metal blends, can be melted into flowable liquids at 220 DEG C.
Embodiment 4:
The implementation process of the present embodiment technical scheme is as follows:
(4-1) core material is poured into a mould in bulk, then the method that is machined into is processed into ellipsoid；
Or directly core material is injected in the mould with elliposoidal cavity, after cooling and demolding
Obtain the core of elliposoidal.Again at the nonporous film of core outer wrapping one strata tetrafluoroethene,
Seal.
(4-2) continuous carbon fibre of intermediate temperature setting (120 DEG C) epoxy resin will be presoaked under room temperature
It is wrapped in the nonporous film surface of the politef of above-mentioned core, then presses autoclave molding work
Process is cladded with the materials such as isolating membrane, airfelt, vacuum bag, inserts in autoclave by regulation
Curing process curing molding, is then cooled to less than 60 DEG C, remove auxiliary material take out with
The composite product of core；Composite product with core is warming up to 150 DEG C or
170 DEG C, now core becomes thick liquid, utilizes compressed air to discharge most of types of intracavity
Core material；It is cooled to 60 DEG C or 45 DEG C again, pulls the nonporous film of politef, along band
The core of pull-out composite product internal residual, or slightly cooling 10～20 DEG C is when core
Constituent material is viscous liquid pull-out thin film when easily pulling out.Obtain forming has ellipsoid
The continuous carbon fibre reinforced epoxy based composites product of shape cavity.
(4-3) the method is also applied for presoaking the continuous carbon fibre of bimaleimide resin,
Simply cure process temperature is 200 DEG C, need when discharging core to be warmed up to 270 DEG C or
300 DEG C, need accordingly to select to be that hard solid, i.e. crystalline melt temperature are higher than when 200 DEG C
This temperature more than 20 DEG C, or glass transition temperature is higher than this temperature more than 30 DEG C, and
It is that viscosity is less than the material of the liquid of 1000Pa.s as preparing core when 270 DEG C or 300 DEG C
Material.
Embodiment 5:
The implementation process of the present embodiment technical scheme is as follows:
(5-1) core material being warming up to 280 DEG C, injection enters into a prefabricated hollow shape
For in flexuose polyimide seal bag, obtain being cladded with polyimide seal bag, interior be easy
The core of molten core material.Again at the nonporous film of core outer wrapping one strata tetrafluoroethene,
Seal.
(5-2) by fine for the unidirectional continuous polyimides of preimpregnation High Temperature Curing Epoxy Resin System under room temperature
Dimension or aramid fiber prepreg are coated with the nonporous film table of the politef at above-mentioned core
Face, places in mould, exports fixing by the sealed nylon bag at core two ends and is tightly connected
On valve, it is ensured that air insulated between core and composite preform, simultaneously composite
The bleeding point evacuation that precast body side is reserved, is warming up to solidify required temperature and by rule
Determine technique solidification and obtain the composite product of molding；It is warming up to 260 DEG C, from the connection of mould
The gas valve of core squeezes into compressed air, discharges by compression sky from another outlet valve
The core material of gas extrusion, cuts out outlet valve to not having liquid after flowing out.It is cooled to subsequently
Less than 55 DEG C or less than 80 DEG C, the demoulding, nonporous film or the polyamides of pullling politef are sub-
Amine seals bag, along the core of band pull-out composite product internal residual, or slightly lowers the temperature
10～20 DEG C when core constituent material is viscous liquid when easily pulling out pull-out thin film.Become
What type was good has the continuous polyimide fiber reinforced epoxy base composite wood of cavity in a zigzag
Material product, or continuous aramid fiber reinforced epoxy based composites product.
From embodiment it can be seen that the present invention relates to one can prepare complicated inner cavity composite
The method of product, i.e. utilizes rigidity under a kind of composite forming temperature, and is warming up to not surpass
Cross melting under product heat distortion temperature and become the material of liquid as core material, therefore solid
Structure and the inner-cavity structure of composite product is well kept during chemical conversion type, and after improving temperature
Intracavity core can be easily removed, finally give the composite system with complicated cavity structure
Part.The present invention is possible not only to prepare continuous lod compound with various cavity structure
Material, and decore speed soon, core material can Reusability.
Although, the most the present invention has been made detailed with general explanation and specific embodiment
Description, but on the basis of the present invention, it can be made some modifications or improvements, this is to ability
It is apparent from for field technique personnel.Therefore, without departing from theon the basis of the spirit of the present invention
These modifications or improvements, belong to the scope of protection of present invention.
Claims (10)
1. the method preparing complicated inner cavity product, it is characterised in that the method includes:
Under a, room temperature, the continuous fiber of pre-soaked resin is wrapped in the whose surfaces being enclosed with isolating membrane,
Or continuous fiber resin prepreg material is coated with is being enclosed with the whose surfaces of isolating membrane, it is enclosed with
The core of precast body；
B, the core being enclosed with precast body is put in mould, utilize fluid sealant and isolating membrane to make core
Isolation is sealed against each other with precast body；
C, at curing temperatures by precast body curing molding, obtain curing molding product；
D, it is warming up to after core constituent material is fused into liquid, apply compressed air and discharge curing molding
The core becoming liquid of product intracavity, cooling and demolding, remove core and the isolating membrane of intracavity residual,
Obtain complicated inner cavity product.
Method the most according to claim 1, it is characterised in that step d is replaced with:
D ', cooling and demolding, be warming up to after core constituent material is fused into liquid, pour out core or applying
Compressed air discharges the core becoming liquid of curing molding product intracavity, removes the type of intracavity residual
Core and isolating membrane, obtain complicated inner cavity product.
Method the most according to claim 1, it is characterised in that described pre-soaked resin continuous
Described in fiber and/or continuous fiber resin, continuous fiber is selected from carbon fiber, glass fibre, aramid fiber
At least one in fiber and polyimide fiber, described resin is selected from epoxy resin, unsaturation
At least one in polyester, benzoxazine resin and bimaleimide resin.
Method the most according to claim 1, it is characterised in that described isolating membrane is poly-four
Fluorothene nonporous film, described fluid sealant is silicone rubber.
Method the most according to claim 1, it is characterised in that described operation pressure is 0.4-1
MPa, described condition of cure is: temperature is 100-200 DEG C.
Method the most according to claim 1, it is characterised in that described core constituent material exists
It is hard solid under described solidification temperature, is becoming can flow higher than this solidification temperature 30～more than 100 DEG C
Dynamic liquid, and the viscosity of this liquid is less than 1000Pa.s.
Method the most according to claim 1, it is characterised in that described pre-soaked resin continuous
Resin in fiber and/or continuous fiber resin is bimaleimide resin, and core constituent material exists
180 DEG C or less than 200 DEG C is hard solid, higher than these 180 DEG C or more than 30～100 DEG C of 200 DEG C
And becoming flowable liquid during less than precast body heat distortion temperature, viscosity is less than 1000Pa.s.
Method the most according to claim 1, it is characterised in that described pre-soaked resin continuous
Resin in fiber and/or continuous fiber resin is epoxy resin, core constituent material 120 DEG C with
It is down hard solid, more than a certain temperature in 150～200 DEG C becomes flowable liquid, and
The viscosity of this liquid is less than 1000Pa.s.
Method the most according to claim 1, it is characterised in that described pre-soaked resin continuous
Resin in fiber and/or continuous fiber resin is epoxy resin, core constituent material 180 DEG C with
It is down hard solid, more than a certain temperature in 210～250 DEG C becomes flowable liquid, and
The viscosity of this liquid is less than 1000Pa.s.
Method the most according to claim 1, it is characterised in that described core constituent material
For polyether-ether-ketone, the crystalline melt temperature of this core constituent material is 140～145 DEG C, 160 DEG C or
At 180 DEG C, viscosity is less than 1000Pa.s；
Or, described core constituent material is modified polyarylether ketone copolymers, and crystalline melt temperature is
200 DEG C, be flowable liquid when 250 DEG C；
Or, described core constituent material is the low-melting-point metal blend that fusing point is less than 220 DEG C.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109318511A (en) * | 2017-08-01 | 2019-02-12 | 北京鸿鹄雄狮技术开发有限公司 | A kind of low cost preparation method of complicated inner cavity composite product |
| CN110466175A (en) * | 2018-05-11 | 2019-11-19 | 坎培诺洛有限公司 | Bicycle assembly parts and relative manufacturing process made of composite material |
| CN113352645A (en) * | 2021-06-03 | 2021-09-07 | 哈尔滨工程大学 | Integrated preparation method of foam filled composite material hemispherical auxetic structure |
| US11377169B2 (en) | 2018-05-11 | 2022-07-05 | Campagnolo S.R.L. | Bicycle crankarm and related crankset |
| US11401002B2 (en) | 2018-05-11 | 2022-08-02 | Campagnolo S.R.L. | Bicycle crankarm having a stress/strain detector for a torque meter or a power meter, and methods for manufacturing and using the crankarm |
| US11577801B2 (en) | 2018-05-11 | 2023-02-14 | Campagnolo S.R.L. | Bicycle component provided with a temperature-compensated stress/strain sensor |
| US11597469B2 (en) | 2018-05-11 | 2023-03-07 | Campagnolo S.R.L. | Bicycle crankarm provided with electric/electronic system |
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| CN103974819A (en) * | 2011-10-19 | 2014-08-06 | 赫克塞尔公司 | High pressure molding of composite parts |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109318511A (en) * | 2017-08-01 | 2019-02-12 | 北京鸿鹄雄狮技术开发有限公司 | A kind of low cost preparation method of complicated inner cavity composite product |
| CN110466175A (en) * | 2018-05-11 | 2019-11-19 | 坎培诺洛有限公司 | Bicycle assembly parts and relative manufacturing process made of composite material |
| US11377169B2 (en) | 2018-05-11 | 2022-07-05 | Campagnolo S.R.L. | Bicycle crankarm and related crankset |
| US11401002B2 (en) | 2018-05-11 | 2022-08-02 | Campagnolo S.R.L. | Bicycle crankarm having a stress/strain detector for a torque meter or a power meter, and methods for manufacturing and using the crankarm |
| CN110466175B (en) * | 2018-05-11 | 2022-10-04 | 坎培诺洛有限公司 | Bicycle component made of composite material and relative manufacturing method |
| US11547004B2 (en) | 2018-05-11 | 2023-01-03 | Campagnolo S.R.L. | Bicycle component made of composite material and related manufacturing process |
| US11577801B2 (en) | 2018-05-11 | 2023-02-14 | Campagnolo S.R.L. | Bicycle component provided with a temperature-compensated stress/strain sensor |
| US11597469B2 (en) | 2018-05-11 | 2023-03-07 | Campagnolo S.R.L. | Bicycle crankarm provided with electric/electronic system |
| CN113352645A (en) * | 2021-06-03 | 2021-09-07 | 哈尔滨工程大学 | Integrated preparation method of foam filled composite material hemispherical auxetic structure |
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| CN106003753B (en) | 2018-08-28 |
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