WO2023095424A1 - 回転部品補強用炭素繊維強化プラスチックの製造装置および成形方法 - Google Patents

回転部品補強用炭素繊維強化プラスチックの製造装置および成形方法 Download PDF

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Publication number
WO2023095424A1
WO2023095424A1 PCT/JP2022/034363 JP2022034363W WO2023095424A1 WO 2023095424 A1 WO2023095424 A1 WO 2023095424A1 JP 2022034363 W JP2022034363 W JP 2022034363W WO 2023095424 A1 WO2023095424 A1 WO 2023095424A1
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WIPO (PCT)
Prior art keywords
carbon fiber
fiber reinforced
reinforced plastic
pressure source
molding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/034363
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English (en)
French (fr)
Japanese (ja)
Inventor
細川直史
山口晃司
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Toray Industries Inc
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Toray Industries Inc
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Filing date
Publication date
Application filed by Toray Industries Inc filed Critical Toray Industries Inc
Priority to EP22898209.6A priority Critical patent/EP4442443A4/en
Priority to US18/701,021 priority patent/US20250001707A1/en
Priority to CA3234486A priority patent/CA3234486A1/en
Priority to JP2022555858A priority patent/JPWO2023095424A1/ja
Priority to CN202280067818.8A priority patent/CN118103197A/zh
Priority to KR1020247011150A priority patent/KR102697081B1/ko
Publication of WO2023095424A1 publication Critical patent/WO2023095424A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • 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
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/027—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles having an axis of symmetry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/12—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of short length, e.g. in the form of a mat
    • B29C70/14—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of short length, e.g. in the form of a mat oriented
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/18—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length in the form of a mat, e.g. sheet moulding compound [SMC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
    • B29C70/205—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres the structure being shaped to form a three-dimensional configuration
    • 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
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/446—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
    • 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
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0082—Producing articles in the form of closed loops, e.g. rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0872—Prepregs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2307/00—Use of elements other than metals as reinforcement
    • B29K2307/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
    • B29L2031/7096—Rings or ring-like articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/749—Motors

Definitions

  • the present invention relates to a manufacturing apparatus and molding method for carbon fiber reinforced plastic for reinforcing rotating parts.
  • CFRP carbon fiber reinforced plastic
  • a ring made of CFRP may be formed on the outer peripheral surface of the rotor.
  • the molding of the ring made of CFRP is performed, for example, as follows.
  • thermosetting resin and carbon fiber e.g., unidirectional prepreg
  • a wrapping tape e.g., highly heat-resistant wrapping tape
  • the assembly is placed in an oven. is heated to cure the thermosetting resin to form a CFRP ring having a predetermined shape, and the tape is removed after the ring is formed.
  • wrapping tape as a secondary material is difficult to reuse due to its usage pattern, so it has to be thrown away, and there is also the problem that the secondary material costs a lot.
  • Patent Documents 1 to 3 various techniques utilizing thermal expansion of rubber or elastomer for molding are known (for example, Patent Documents 1 to 3). It is difficult to apply CFRP for part reinforcement to molding. In addition, when forming a CFRP ring on the outermost layer of a rotating part having a circular cross section for reinforcing it, it is desirable to apply a molding pressure evenly in the direction of the center of the rotating part. None of the technologies has come to meet such demands.
  • an object of the present invention is to shorten the manufacturing time and reduce the cost in order to make it suitable for mass production when molding a desired CFRP ring as the outermost layer as a reinforcement of a rotating part having a circular cross section. It is possible to have excellent mass productivity with equipment, and it is possible to reuse used materials repeatedly without using disposable secondary materials, so it is possible to reduce manufacturing costs, and moreover, it is even in the center direction of the rotating parts.
  • the present invention has the following configuration.
  • a manufacturing device that molds a ring made of carbon fiber reinforced plastic as the outermost layer to reinforce a rotating part with a circular cross section, and is a unidirectional prepreg made of thermosetting resin and carbon fiber wound around the rotating part.
  • An apparatus for manufacturing carbon fiber reinforced plastic for reinforcing rotating parts characterized in that an annular pressure source utilizing the thermal expansion of the prepreg is present between the cavity of the mold and the unidirectional prepreg.
  • the pressure source is a flexible object having a coefficient of linear expansion of 1 ⁇ 10 ⁇ 4 /° C. or more.
  • the carbon fiber reinforcement for reinforcing rotating parts according to any one of (8) to (14), wherein the pressure source is in contact with the unidirectional prepreg and has a certain gap from the mold before heating.
  • a method of molding plastic (16) A cavity of the mold is formed in a through hole, and a preassembly is formed by assembling the rotating part, the unidirectional prepreg, and the pressure source in a predetermined positional relationship, and the preassembly is inserted into the through hole.
  • the rotating part reinforcing carbon according to any one of (8) to (15), wherein after inserting from one side and molding the ring, the assembly with the ring molded is removed from the other side of the through hole.
  • a molding method for fiber-reinforced plastics 16
  • the mold cavity (more precisely, the inner peripheral surface of the cavity) and the unidirectional prepreg (more precisely, the outer periphery of the unidirectional prepreg) (surface)
  • the inner peripheral surface of the cavity of the mold serving as a fixed surface
  • the prepreg is evenly pressurized toward the center of the rotating part having a circular cross section by a pressure source, and the unidirectional prepreg is heat-cured while the uniform molding pressure is applied by this external pressure to form a CFRP ring for reinforcing the rotating part.
  • the uniform molding pressure due to the external pressure can be easily set to a desired pressure depending on the material of the pressure source, the dimension between the cavity of the mold and the unidirectional prepreg before heating, the heating temperature, and the like.
  • the thermal expansion of the pressure source itself accompanying heating of the mold for curing the unidirectional prepreg is used, but after molding the CFRP ring, the pressure source may be removed from the CFRP ring, By appropriately selecting the material, the removed pressure source can be reused repeatedly by cooling to the initial state or by thermal contraction due to cooling to a certain extent. cost can be reduced.
  • the molding according to the present invention it is possible and simple to mold a reinforcing CFRP ring for a rotating part as long as there is a heatable mold having a cavity of a predetermined size and a pressure source as described above. It is possible to easily and quickly manufacture the CFRP ring for reinforcing rotating parts with inexpensive equipment in a short period of time, and achieve excellent mass productivity.
  • the use of a multi-cavity mold allows multiple reinforcing CFRP rings to be molded simultaneously, making it more adaptable for mass production.
  • FIG. 1 is a schematic perspective view showing a molding method of CFRP for reinforcing rotating parts according to one embodiment of the present invention
  • FIG. Fig. 2(a) is a schematic perspective view of a mold in a CFRP manufacturing apparatus for reinforcing rotating parts according to one embodiment of the present invention, and a pre-assembly of a rotating part, a unidirectional prepreg and a pressure source is inserted into a cavity of the mold.
  • FIG.2(b) shows the state which carried out.
  • FIG. 4 is a schematic perspective view of a manufacturing apparatus for CFRP for reinforcing rotating parts according to another embodiment of the present invention.
  • 1 is a schematic perspective view showing an example of a molding cycle in a molding method of CFRP for reinforcing rotating parts according to one embodiment of the present invention
  • FIG. 1 shows a molding method of CFRP for reinforcing rotating parts according to one embodiment of the present invention
  • FIG. 2 shows a manufacturing apparatus for CFRP for reinforcing rotating parts according to one embodiment of the present invention.
  • reference numeral 3 denotes a rotating part whose cross section is circular with respect to the rotating shaft.
  • the outermost layer is a ring made of CFRP (the reinforcement molded in FIG. 4). ) is molded.
  • the CFRP ring for reinforcement is molded by a process of winding a unidirectional prepreg 4 made of thermosetting resin and carbon fiber around the rotating part 3 and then heating and curing it in the mold 1 .
  • a mold 1 is formed with a cavity 2 having a circular cross section.
  • An annular pressure source 5 is interposed between the outer peripheral surfaces of the unidirectional prepregs 4 .
  • the annular pressure source 5 applies external pressure (for example, external pressure P shown in FIG. 1) to the unidirectional prepreg 4 against the inner peripheral surface of the cavity 2 by utilizing its own thermal expansion accompanying heating of the mold 1.
  • the unidirectional prepreg 4 is heat-hardened while an external pressure P is applied to form a reinforcing CFRP ring.
  • thermosetting resin of the unidirectional prepreg 4 made of the thermosetting resin and carbon fiber is not particularly limited, and epoxy resin, cyanate ester resin, bismaleimide resin, polyimide resin, etc. can be used. Epoxy resins are preferred.
  • the type of carbon fiber is not particularly limited, and from the viewpoint of being able to effectively reinforce the rotating part 3 (for example, the rotating part 3 rotating at high speed can be effectively reinforced against centrifugal force), Carbon fibers that extend continuously in the circumferential direction are preferred.
  • the unidirectional prepreg 4 may include a unidirectional prepreg having carbon fibers continuously extending in the circumferential direction of the rotating part 3.
  • the thickness of the unidirectional prepreg 4 in the radial direction of the rotating part is not particularly limited, from the viewpoint of reducing the size and weight of the rotating part 3 with the reinforcing CFRP ring, it is sufficient if only the thickness necessary for the reinforcement can be secured. Smaller is better.
  • the material of the pressure source 5 is not particularly limited as long as it can apply the target external pressure P to the unidirectional prepreg 4 by utilizing its own thermal expansion. /° C. or more and 10 ⁇ 10 ⁇ 4 /° C. or less.
  • Fluoro-rubber is an example of a flexible material having such a coefficient of linear expansion.
  • a more preferable linear expansion coefficient of the flexible object is 2 ⁇ 10 ⁇ 4 /° C. or more and 5 ⁇ 10 ⁇ 4 /° C. or less.
  • Examples of materials for flexible objects having such a coefficient of linear expansion include silicone rubber. Silicon rubber and fluororubber have good releasability, so they can be said to be preferable materials for the demolding process shown in FIG. 4, which will be described later.
  • the external pressure P applied by the pressure source 5 during heat curing of the unidirectional prepreg 4 is not particularly limited as long as the CFRP ring after the unidirectional prepreg 4 is cured has a target thickness. If the thickness is too large, the rotating part 3 may be affected unexpectedly.
  • a preferable external pressure P is, for example, in the range of 0.1 MPa or more and 10 MPa or less.
  • a more preferable range of the external pressure P is 0.2 MPa or more and 8 MPa or less.
  • the thickness of the pressure source 5 is not particularly limited as long as the external pressure P to the unidirectional prepreg 4 due to its own thermal expansion is within a preferable range and a uniform external pressure P can be applied. , it may be difficult to apply a uniform external pressure P within a preferable range. be.
  • the thickness of the pressure source 5 is preferably in the range of 1 to 100 times the thickness of the unidirectional prepreg 4, and more preferably in the range of 2 to 80 times.
  • the unidirectional prepreg 4 Before the pressure source 5 is heated and thermally expanded, i.e. the unidirectional prepreg 4 is inserted together with the rotating part 3 into the cavity 2 of the mold 1 and between the cavity 2 and the unidirectional prepreg 4 an annular pressure source 5 is formed. is interposed, the pressure source 5 is in contact with the unidirectional prepreg 4, and preferably has a certain gap with the mold 1 (with the inner peripheral surface of the cavity 2 of the mold 1). Since the unidirectional prepreg 4 is molded into the reinforcing CFRP ring of the rotating part 3, the unidirectional prepreg 4 is brought into contact with the pressure source 5 and held in a predetermined positional relationship before the external pressure P is applied.
  • the pressure source 5 is placed in the cavity 2 of the mold 1 together with the rotating part 3 and the unidirectional prepreg 4 wound thereon (that is, as a pre-assembly). Since insertion is preferable in terms of process, in order to ensure ease of insertion at that time, in addition, from the viewpoint of ease of demolding after heat curing molding of the CFRP ring, the pressure source 5 is set before heating. It is preferable to have a certain gap from the inner peripheral surface of the cavity 2 of the mold 1 . By doing so, the pressure source 5 (for example, the pressure source 5 provided on the unidirectional prepreg 4) can be easily inserted into the cavity 2 of the mold 1 before heat curing molding of the CFRP ring. After molding, preferably after the pressure source 5 is thermally shrunk to some extent, the pressure source 5 can be easily removed from the mold 1 together with the molded CFRP ring.
  • the rotating component 3 to be molded with the reinforcing CFRP ring is, for example, a rotor of a motor
  • the rotating component 3 may have a magnet.
  • the mold 1 is made of a magnetic material
  • the mold 1 is made of a non-magnetic material (for example, non-magnetic metal), such fears can be eliminated.
  • FIG. 3 illustrates the case where there are four cavities 2, since the number of cavities 2 and the number of molds 1 can be easily increased, it is possible to easily handle a huge amount of production.
  • FIG. 4 shows an example in which one mold 1 as shown in FIG. 1 has one cavity 2, but one mold 1 as shown in FIG. It is also applicable when
  • the cavity 2 of the mold 1 is formed in a through-hole, and the rotating part 3, the unidirectional prepreg 4 wound thereon and the pressure source 5 provided thereon are in place. It is inserted from one side (from above) into the through-hole forming the cavity 2 in the form of a pre-assembly 6 which is assembled in relation to each other and is shown in FIG.
  • the unidirectional prepreg 4 is formed into a reinforcing CFRP ring by heat curing while external pressure is applied to the unidirectional prepreg 4 using the thermal expansion of the pressure source 5 accompanying the heating of the mold 1 .
  • Process (B) of FIG. 4 shows the state of the unidirectional prepreg 4 immediately after heat curing. 3, the assembly of rotating part 3, heat-cured unidirectional prepreg 4, and pressure source 5 is locally cooled to keep the temperature of mold 1 substantially constant while pressure source 5 is heated. contracted.
  • the local cooling mechanism 8 is incorporated in the demolding mechanism 9 .
  • the pressure source 5 is removed from the demolded assembly 11, and the removed pressure source 5 is repeatedly reused for assembling the pre-assembly 6 described above for the next molding.
  • the assembly 11 from which the pressure source 5 has been removed becomes a rotating component 12 with a reinforcing CFRP ring (that is, a rotating component 3 provided with a reinforcing CFRP ring 13 formed on the outermost layer) as a target product. .
  • the series of manufacturing or molding processes as described above is a process that can be executed repeatedly. 2, since the process can be executed while continuously moving the pre-assembly 6 and the molded assembly 11 from top to bottom, mass production can be easily handled and automated. is also possible.
  • the present invention can be applied to the manufacture of all rotating parts that require molding of reinforcing CFRP rings for rotating parts with a circular cross section.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Moulding By Coating Moulds (AREA)
PCT/JP2022/034363 2021-11-29 2022-09-14 回転部品補強用炭素繊維強化プラスチックの製造装置および成形方法 Ceased WO2023095424A1 (ja)

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EP22898209.6A EP4442443A4 (en) 2021-11-29 2022-09-14 MANUFACTURING DEVICE AND FORMING METHOD FOR CARBON FIBER REINFORCED PLASTIC MATERIAL FOR REINFORCING ROTARY COMPONENT
US18/701,021 US20250001707A1 (en) 2021-11-29 2022-09-14 Manufacturing device and molding method for rotary-component reinforcement carbon fiber reinforced plastic
CA3234486A CA3234486A1 (en) 2021-11-29 2022-09-14 Manufacturing device and molding method for rotary-component reinforcement carbon fiber reinforced plastic
JP2022555858A JPWO2023095424A1 (https=) 2021-11-29 2022-09-14
CN202280067818.8A CN118103197A (zh) 2021-11-29 2022-09-14 旋转部件加强用碳纤维增强塑料的制造装置及成形方法
KR1020247011150A KR102697081B1 (ko) 2021-11-29 2022-09-14 회전부품 보강용 탄소섬유 강화 플라스틱의 제조 장치 및 성형 방법

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KR102697081B1 (ko) 2024-08-22
CA3234486A1 (en) 2023-06-01
CN118103197A (zh) 2024-05-28
EP4442443A4 (en) 2025-10-15
US20250001707A1 (en) 2025-01-02
EP4442443A1 (en) 2024-10-09
KR20240049641A (ko) 2024-04-16

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