WO2021260953A1 - 繊維強化樹脂製管体の製造方法 - Google Patents

繊維強化樹脂製管体の製造方法 Download PDF

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Publication number
WO2021260953A1
WO2021260953A1 PCT/JP2020/025393 JP2020025393W WO2021260953A1 WO 2021260953 A1 WO2021260953 A1 WO 2021260953A1 JP 2020025393 W JP2020025393 W JP 2020025393W WO 2021260953 A1 WO2021260953 A1 WO 2021260953A1
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WO
WIPO (PCT)
Prior art keywords
mandrel
resin
fiber
connecting member
mold
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/JP2020/025393
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English (en)
French (fr)
Japanese (ja)
Inventor
貴博 中山
健一 森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Astemo Ltd
Original Assignee
Hitachi Astemo Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Astemo Ltd filed Critical Hitachi Astemo Ltd
Priority to JP2020542673A priority Critical patent/JP6873369B1/ja
Priority to PCT/JP2020/025393 priority patent/WO2021260953A1/ja
Priority to CN202080099790.7A priority patent/CN115427217A/zh
Priority to DE112020006763.7T priority patent/DE112020006763T5/de
Publication of WO2021260953A1 publication Critical patent/WO2021260953A1/ja
Priority to US17/932,525 priority patent/US12296548B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • B29C70/541—Positioning reinforcements in a mould, e.g. using clamping means for the reinforcement
    • 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
    • B29C70/32—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 on a rotating 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
    • 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
    • B29C70/48—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 and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/026—Shafts made of fibre reinforced resin

Definitions

  • the present invention relates to, for example, a method for manufacturing a fiber-reinforced resin pipe body used as a power transmission shaft of a vehicle.
  • the power transmission shaft (propeller shaft) mounted on the vehicle is provided with a pipe body extending in the front-rear direction of the vehicle, and the power generated by the prime mover and decelerated by the transmission is transmitted to the final deceleration device by this pipe body.
  • a tube used for such a power transmission shaft there is a tube made of fiber reinforced plastic manufactured by using a mandrel (see Patent Document 1).
  • Patent Document 2 describes that as a method of winding a material around a mandrel, a resin-impregnated fiber is wound around the mandrel by a filament winding method, and the resin-impregnated fiber is cured by an autoclave treatment.
  • Patent Document 3 describes that after winding a fiber body not impregnated with resin around a mandrel, the fiber body is impregnated with resin in a mold.
  • the present invention has been created to solve such a problem, and is a method for manufacturing a fiber-reinforced resin tube body that can secure clearance in the mold and suppress the weight of the tube body.
  • the challenge is to provide.
  • the method for manufacturing a fiber-reinforced resin tube of the present invention includes an arrangement step of arranging the fiber body with respect to the outer peripheral surface of the resin mandrel by a filament wind method, and the arrangement step. After the expansion step in which the mandrel in which the fiber body is arranged is placed in a mold and the inside of the mandrel in which the fiber body is arranged is pressed to expand the mandrel, and after the expansion step, It is characterized by comprising a molding step of supplying a resin into the mold, impregnating the fiber body with the resin, and curing the impregnated resin to form a tube body.
  • the present invention it is possible to secure a clearance when arranging the mandrel on which the fiber body is arranged in the mold and prevent the fiber body from biting into the mold. Further, the expanded shape of the mandrel can be suitably installed depending on the shape in the mold, and the increase in the amount of resin in the finished product of the fiber-reinforced resin tube can be prevented and the weight of the tube can be suppressed. ..
  • the fiber-reinforced resin tube body (hereinafter, simply referred to as “tube body”) 1A includes a mandrel 10, a first connecting member 20, and a second connection.
  • a member 30, a third connecting member 40, a resin-containing fiber layer 50, and a resin layer 60A are provided.
  • the tubular body 1A is composed of the resin-containing fiber layer 50 and the resin layer 60A, and the first connecting member 20, the second connecting member 30, and the third connecting member 40 are connected to the tubular body 1A.
  • the mandrel 10 is a core material of the pipe body 1A.
  • the mandrel 10 is a resin member having a tubular shape.
  • the mandrel 10 functions as a core material of the tube body 1A.
  • the material of the mandrel 10 may be any material that can withstand the heating of the resin-containing fiber layer 50 during resin curing. Examples of the material of the mandrel 10 include PP (polypropylene resin), PET (polyethylene terephthalate resin), SMP (shape memory polymer) and the like.
  • the mandrel 10 includes a large diameter portion 11 in the middle portion in the axial direction, a tapered portion 12 and a medium diameter portion 13 formed in one end portion in the axial direction, and a step portion 14 and a small diameter portion 15 formed in the other end portion in the axial direction. , Are provided together.
  • the large diameter portion 11 of the mandrel 10 exhibits a cylindrical shape having the same diameter over the entire axial direction (see FIG. 3).
  • the large-diameter portion 11 of the mandrel 10 exhibits a barrel shape that expands in the radial direction in the axial intermediate portion. That is, the outer diameter of the mandrel 10 decreases from the intermediate portion in the axial direction toward both ends in the axial direction.
  • the first connecting member 20 is a columnar member that is inserted and connected to one end in the axial direction of the mandrel 10.
  • the first connecting member 20 is a metal stub shaft.
  • the first connecting member 20 integrally includes a large diameter portion 21, a small diameter portion 22, and a medium diameter portion 23 in order from the mandrel 10 side.
  • the large diameter portion 21 is a portion that is partially inserted into the medium diameter portion 13 of the mandrel 10.
  • the small diameter portion 22 and the medium diameter portion 23 are portions exposed from the mandrel 10.
  • the external gear formed on the outer peripheral surface of the large diameter portion 21 meshes with the internal gear formed on the inner peripheral surface of the medium diameter portion 13 of the mandrel 10. As a result, the movement (rotation) of the first connecting member 20 with respect to the mandrel 10 in the circumferential direction is restricted.
  • the second connecting member 30 is a tubular member that is fitted and connected to the step portion 14 of the mandrel 10.
  • the internal gear formed on the inner peripheral surface of the second connecting member 30 meshes with the external gear formed on the outer peripheral surface of the step portion 14 of the mandrel 10.
  • the second connecting member 30 is a metal collar and is fixed to the mandrel 10 by a spline joint.
  • the outer diameter of the second connecting member 30 is substantially equal to the outer diameter of the large diameter portion 11 in the mandrel 10 before expansion.
  • the third connecting member 40 is a member that is externally fitted to the small diameter portion of the mandrel 10 and is connected to the second connecting member 30. One end in the axial direction of the third connecting member 40 is in contact with the boundary between the step portion 14 and the small diameter portion 15 of the mandrel 10 and the other end in the axial direction of the second connecting member 30.
  • the third connecting member 40 is a metal yoke stub and is joined to the second connecting member 30 by laser welding.
  • the resin-containing fiber layer 50 is provided on the large diameter portion 11, the tapered portion 12, the medium diameter portion 13, the large diameter portion 21 of the first connecting member 20, and the outer peripheral surface of the second connecting member 30 of the mandrel 10. There is.
  • the resin-containing fiber layer 50 has, as carbon fiber layers, a first carbon fiber layer 51 (see FIG. 4) and a second carbon fiber layer 52 (see FIG. 5) in this order from the radial inner side (mandrel 10 side). , A third carbon fiber layer 53 (see FIG. 6).
  • FIGS. 4 to 6 only a part of each carbon fiber layer 51, 52, 53 is shown.
  • the outer peripheral surface of the axial end portion of the large diameter portion 21 of the first connecting member 20 (the end portion located on the opposite side of the mandrel 10 in the axial direction of the first connecting member 20) and the second connecting member 30.
  • the outer peripheral surface of the other end in the axial direction (the end located on the opposite side of the mandrel 10 in the axial direction of the second connecting member 30) is not covered with the resin-containing fiber layer 50, and the resin-containing fiber layer is not covered. It is exposed from 50.
  • the first carbon fiber layer 51 is composed of a plurality of carbon fibers provided so as to cover the outer peripheral surface of the mandrel 10 or the like.
  • the carbon fibers in the first carbon fiber layer 51 extend parallel to the axial direction of the mandrel 10. That is, with respect to the first carbon fiber layer 51, the orientation angle of the carbon fibers with respect to the axis X of the mandrel 10 is 0 °.
  • the second carbon fiber layer 52 is provided on the radial outer side of the first carbon fiber layer 51, and a plurality of carbons provided so as to cover the first carbon fiber layer 51. It is composed of fibers.
  • the carbon fibers in the second carbon fiber layer 52 are wound around one or more turns so as to be inclined by 45 ° with respect to the axial direction of the mandrel 10, and extend spirally with respect to the axial direction of the mandrel 10. That is, with respect to the second carbon fiber layer 52, the orientation angle of the carbon fibers with respect to the axis X of the mandrel 10 is 45 ° before the expansion of the mandrel 10.
  • the third carbon fiber layer 53 is provided on the radial outer side of the second carbon fiber layer 52, and a plurality of carbons provided so as to cover the second carbon fiber layer 52. It is composed of fibers.
  • the carbon fibers in the third carbon fiber layer 53 are wound around one or more turns so as to be inclined by ⁇ 45 ° with respect to the axial direction of the mandrel 10, and are spirally extended with respect to the axial direction of the mandrel 10. .. That is, with respect to the third carbon fiber layer 53, the orientation angle of the carbon fibers with respect to the axis X of the mandrel 10 is ⁇ 45 ° before the expansion of the mandrel 10.
  • the resin layer 60A is an annular layer provided on the outer peripheral surface of the large diameter portion 21 of the first connecting member 20.
  • the thickness of the resin layer 60 is substantially equal to the thickness of the resin-containing fiber layer 50.
  • the resin layer 60A covers and protects a portion of the large-diameter portion 21 of the first connecting member 20 that is exposed from the resin-containing fiber layer 50.
  • the resin mandrel 10 is formed by a molding apparatus (mold) (not shown) (step S1, mandrel forming step). Subsequently, a first connecting member (stub shaft) 20 is provided at one end of the mandrel 10 in the axial direction (step S2, first connecting step). Subsequently, a second connecting member (collar) 30 is provided at the other end of the mandrel 10 in the axial direction (step S3, second connecting step).
  • steps S2 and S3 can be changed as appropriate, and steps S3 may come first or at the same time.
  • a first carbon fiber layer 51 is formed on the outer peripheral surface of the mandrel 10, the large diameter portion 21 of the first connecting member 20, and the second connecting member 30 by a device (not shown).
  • Step S4 first carbon fiber layer forming step, placement step.
  • a second carbon fiber layer 52 is placed on the outer peripheral surface of the first carbon fiber layer 51 in the mandrel 10, the first connecting member 20, and the second connecting member 30 by a device (not shown). It is formed (step S5, second carbon fiber layer forming step, placement step). Subsequently, as shown in FIG.
  • a third carbon fiber layer 53 is placed on the outer peripheral surface of the second carbon fiber layer 52 in the mandrel 10, the first connecting member 20, and the second connecting member 30 by a device (not shown). It is formed (step S6, third carbon fiber layer forming step, placement step). In steps S4 to S6, the fibers are not arranged at the ends of the large diameter portion 21 of the first connecting member 20 and the end portions of the second connecting member 30 located on the opposite sides of the mandrel 10 in the axial direction. Carbon fiber layers 51 to 53 are formed.
  • each carbon fiber layer 51 to 53 is not a resin-impregnated fiber but a so-called raw silk. Further, each of the carbon fiber layers 51 to 53 is arranged on the outer peripheral surface of the large diameter portion 21 of the mandrel 10 and the first connecting member 20 by the multi-feed filament wind method. Each of the carbon fiber layers 51 to 53 fed by the multi-feed yarn filament wind method exhibits a so-called non-crimp structure which is independent as a layer without being woven into each other.
  • a step of pressurizing the inside of the resin mandrel 10 with a fluid or the like is provided before the arrangement steps S4 to S6, and the arrangement steps S4 to S6 are executed in a state where the inside of the mandrel 10 is pressurized. There may be. In this case, even if the strength of the resin mandrel 10 is low, it is possible to prevent the mandrel 10 from being damaged by the torque when the carbon fiber layers 51 to 53 are provided on the outer peripheral surface of the mandrel 10. can do.
  • the assembly of the mandrel 10, the first connecting member 20, the second connecting member 30, and the carbon fiber layers 51 to 53 is installed in the molding apparatus (mold) 2 (step). S7).
  • the inner surface of the molding apparatus (mold) 2 exhibits a shape having the maximum inner diameter at a portion corresponding to the axial intermediate portion of the large diameter portion 11 of the mandrel 10. That is, in the mold closed state, the molding apparatus 2 has a portion in which the diameter of the inner peripheral surface thereof is larger than the outer diameter of the layer in which the carbon fiber layers 51 to 53 are laminated, and the inner peripheral surface of the molding apparatus 2 is formed. Has a portion where the carbon fiber layers 51 to 53 installed in the molding apparatus 2 are separated from the outer peripheral surface of the laminated layer. This prevents the carbon fiber layers 51 to 53 from being bitten into the contact surface of the mold divided into a plurality of pieces.
  • step S8 expansion step
  • the large diameter portion 11 of the mandrel 10 is heated and expanded by the fluid flowing in the mandrel 10.
  • step S7 heating the mandrel 10 with a fluid can be omitted.
  • the supply and discharge of the fluid into the mandrel 10 is performed through the fluid gate 2a formed on the small diameter portion 15 side of the mandrel 10, the hole formed in the small diameter portion 15, and the like.
  • step of pressurizing the inside of the resin mandrel 10 When the step of pressurizing the inside of the resin mandrel 10 is executed before the arrangement steps S4 to S6, the inside of the mandrel 10 is depressurized after the completion of the arrangement steps S4 to S6, and the inside of the mandrel 10 is depressurized, and then steps S7 and S8. (Repressurization) may be performed. Further, after the completion of the arrangement steps S4 to S6, the inside of the mandrel 10 may not be depressurized, and steps S7 and S8 (repressurization) may be executed.
  • the resin 54 is supplied into the molding apparatus 2, and the first carbon fiber layer 51, the second carbon fiber layer 52, and the third carbon fiber layer 52 are arranged on the outer peripheral surface of the mandrel 10.
  • the carbon fiber layer 53 is impregnated with the resin 54, and the resin 54 is cured by applying heat to the molding apparatus 2 to form the resin-containing fiber layer 50 and the resin layer 60A (step S9, molding step).
  • the resin 54 is, for example, a thermosetting resin.
  • the mold of the molding apparatus 2 is divided into a plurality of parts, and in the molding step, heat is applied to the assembly, and the mold of the molding apparatus 2 is further closed after the mold closing operation.
  • the mold clamping operation By performing a mold clamping operation in which pressure is applied to the mold, the pressure in the mold is increased, and the curing of the resin 54 is promoted.
  • the mold since the mold is described as being divided into a plurality of parts, the mold closing operation and the mold clamping operation are performed, but the mold clamping operation is not always necessary. Further, when the mold is not divided into a plurality of parts, such a mold closing operation and a mold tightening operation are not always necessary.
  • a space (resin pool 2c) is formed on the outlet side of the gate 2b into which the molten resin 54 is introduced.
  • the resin 54 introduced into the molding apparatus 2 is stored in the resin pool 2c located on the side of one end in the axial direction of the fiber layers 51 to 53.
  • the resin 54 stored in the resin pool 2c is a suction port 2d formed on the side opposite to the gate 2b in the arrangement direction of the fiber layers 51 to 53 (the outer peripheral surface side of the other end in the axial direction of the fiber layers 51 to 53).
  • vacuum suction from it moves in the axial direction of the mandrel 10 and impregnates each carbon fiber layer 51 to 53.
  • the resin 54 impregnated in the carbon fiber layers 51 to 53 heat is applied to the molding apparatus 2 and pressure is applied to the inside of the molding apparatus 2, so that the resin-containing fiber layer 50 is formed and the resin-containing fiber layer 50 is formed.
  • the resin layer 60A is formed at the portion corresponding to the resin pool 2c.
  • the molded assembly that is, the molded body is taken out from the molding apparatus 2 (step S10).
  • a third connection is made to an end portion of the second connecting member 30 of the molded body, which is located on the side opposite to the mandrel 10 in the axial direction and is not covered by the resin-containing fiber layer 50.
  • the member (yoke stub) 40 is attached by laser welding (step S11, third connection step).
  • the method for producing the tubular body 1A according to the first embodiment of the present invention is an arrangement step in which resin fiber bodies (each carbon fiber layer 51 to 53) are arranged on the outer peripheral surface of the mandrel 10 by a filament wind method.
  • the mandrel 10 in which the fiber body is arranged is placed in a mold (molding apparatus 2), and the inside of the mandrel 10 in which the fiber body is arranged is added.
  • the resin 54 is supplied into the mold, the fiber is impregnated with the resin, and the impregnated resin 54 is cured.
  • a molding step S9 for molding the tubular body 1A includes a molding step S9 for molding the tubular body 1A. According to such a configuration, it is possible to secure a clearance when arranging the mandrel 10 on which the fibrous body is arranged in the mold and prevent the fibrous body from biting into the mold. Further, the expansion shape of the mandrel 10 can be suitably adjusted by the shape in the mold, the increase in the amount of the resin 54 in the finished product of the tube body 1A can be prevented, and the weight of the tube body 1A can be suppressed. ..
  • the mandrel 10 remains as the core material of the tubular body 1A after the molding step S9. According to such a configuration, the work of removing the mandrel 10 can be eliminated, and the strength and rigidity of the tubular body 1A can be suitably secured by the mandrel 10.
  • the method for manufacturing the tubular body 1A includes a first connecting step S1 for connecting the first connecting member 20 to one end of the mandrel 10 before the placement step, and the fibers in the placement steps S4 to S6.
  • the body is also arranged on the outer peripheral surface of the first connecting member 20.
  • the mold (molding apparatus 2) has a space (in which the resin 54 injected into the mold is stored in the connecting portion of the mandrel 10 and the first connecting member 20). It has a resin pool 2c), and in the molding step S9, the resin 54 stored in the space is sucked to impregnate the fiber body.
  • the resin 54 can be suitably impregnated between the fibers, and the resin layer 60A can be suitably formed by utilizing the space in which the resin 54 is stored.
  • the fibrous body is arranged by the multi-feed yarn filament wind method in the arrangement steps S4 to S6.
  • the fibrous bodies exhibit a crimp structure
  • the thickness increases at the portion where the fibrous bodies are woven together.
  • the plurality of fiber layers 51 to 53 can have a so-called non-crimp structure
  • the arranged fiber bodies can be suitably followed without inhibiting the expansion of the mandrel 10. ..
  • the non-crimp structure the thickness of the resin-containing fiber layer 50 can be suppressed, the non-uniformity of the shape can be reduced, and the local stress can be reduced.
  • the gaps between the fiber bodies are made uniform, and the resin 54 can be suitably impregnated between the fiber bodies.
  • the method for manufacturing the tubular body 1A includes the second connecting step S3 for connecting the second connecting member 30 to the other end of the mandrel 10 before the placement steps S4 to S6, and the placement steps S4 to S6.
  • the fiber body is also arranged on the outer peripheral surface of the second connecting member 30.
  • the inside of the mandrel 10 is pressurized by circulating a fluid inside the mandrel 10, and the heat of the fluid causes the mandrel 10 and the fiber body. Is heated. According to such a configuration, heating of the resin 54 can be suitably promoted in the molding step.
  • the tubular body 1B includes a resin ring 70 and a resin layer 60B instead of the resin layer 60A.
  • the tubular body 1B is composed of a resin-containing fiber layer 50, a resin layer 60B, and a resin ring 70, and the tubular body 1B includes a first connecting member 20, a second connecting member 30, and a third connecting member. 40 are connected.
  • the mandrel 10 is a core material of the pipe body 1B.
  • the resin ring 70 is an annular member that is externally fitted on the outer peripheral surface of the large diameter portion 21 of the first connecting member 20.
  • the resin ring 70 is a fiber-reinforced resin ring containing reinforcing fibers (for example, discontinuous carbon fibers and the like) in the same material as the resin 54.
  • the axial end of the resin ring 70 is in contact with the axial end of the resin-containing fiber layer 50.
  • the inner diameter of the resin ring 70 is substantially equal to the outer diameter of the large diameter portion 21 of the first connecting member 20, and the outer diameter of the resin ring 70 is smaller than the outer diameter of the resin-containing fiber layer 50.
  • the resin layer 60B is provided on the outer peripheral surface of the resin ring 70. It is a ring-shaped layer.
  • the outer diameter of the resin layer 60B is substantially equal to the outer diameter of the end portion of the resin ring 70 and the resin-containing fiber layer 50 in contact with the resin layer 60B.
  • the resin ring 70 and the resin layer 60B cover and protect the portion of the large diameter portion 21 of the first connecting member 20 that is exposed from the resin-containing fiber layer 50.
  • step S6 the resin ring 70 is externally fitted to a portion of the large diameter portion 21 of the first connecting member 20 exposed from each of the carbon fiber layers 51 to 53 (step S6B, outer fitting step).
  • step S9 the resin layer 60B is formed so as to cover the outer peripheral surface of the resin ring 70.
  • the tubular body 1B includes a mandrel 10 made of resin, a first connecting member 20 connected to one end of the mandrel 10, and the mandrel 10 and the first connecting member 20.
  • the fiber body arranged on the outer peripheral surface of the member 20 is impregnated with the resin 60B which forms a layer on the outer peripheral surface of the resin ring 70.
  • the resin ring 70 can alleviate the difference in molding shrinkage between the resin-containing fiber layer 50 and the resin layer 60B, and prevent the occurrence of cracks between the resin-containing fiber layer 50 and the resin layer 60B.
  • the mandrel 10 maintains a state in which its axial direction is in the vertical direction (so-called vertical installation state) at least while steps S3 to S10 are executed. According to such a configuration, even when the orientation angle of the fiber body (particularly, the third carbon fiber layer 53 arranged on the outermost side) is small, the displacement of the fiber body can be suitably suppressed.
  • step S1 a plurality of convex portions 11a are formed on the outer peripheral surface of the large diameter portion 11 in the mandrel 10X.
  • the mandrel 10X having such a convex portion 11a is formed by using the shape in the molding apparatus (mold) 3 when manufacturing the mandrel 10X made of resin. That is, a plurality of concave portions 3a corresponding to the convex portions 11a are formed on the inner peripheral surface of the molding apparatus 3 used in step S1 (see FIG. 12).
  • the height of the convex portion 11a is equal to or less than the total height of the three carbon fiber layers 51 to 53, and the radial center of the outermost carbon fiber layer 53 among the three carbon fiber layers 51 to 53. It is desirable that it is at least the total height up to.
  • the mandrel 10X prevents the carbon fiber layers 51 to 53 from being displaced in the convex portion 11a. That is, the mandrel 10X having the convex portion 11a makes it possible to arrange the carbon fiber layers 51 to 53 at an accurate orientation angle in steps S4 to S6, and even after the expansion of the mandrel 10X, each carbon fiber layer It is possible to maintain the orientation angle of 51 to 53 at a suitable angle.
  • the recess 3a is formed by using a mold (molding device 3) having a recess 3a on the inner surface before the arrangement steps S4 to S6.
  • the mandrel forming step of forming the mandrel 10X having the corresponding convex portion 11a on the outer peripheral surface is included. According to such a configuration, the orientation angle of the fibrous body can be maintained at a suitable angle after the expansion of the mandrel 10X.
  • the large diameter portion 11 of the mandrel 10 and the resin-containing fiber layer 50 provided on the outer peripheral surface of the large diameter portion 11 are It has a cylindrical shape instead of a barrel shape.
  • the inner surface of the molding apparatus (mold) 2Y for manufacturing the tubular body 1Y exhibits a cylindrical shape larger than the outer diameter of the carbon fiber layers 51 to 53.
  • the mandrel 10 may be extracted from the molded resin-containing fiber layer 50 during steps S9 and S10. Further, the mandrel 10 may be configured to be melted and removed by the heat of the fluid in step S8 and / or the heat of the resin 54 or the molding apparatus (mold) 2 in step S9. It is also possible to melt and remove the mandrel 10 by other energies such as heat, electricity, and vibration.
  • the unheated fluid may be circulated in the mandrel 10, and the heated fluid may be circulated in the mandrel 10 during the execution of step S9.
  • the carbon fiber layers 51 to 53 may exhibit a so-called crimp structure woven into each other.
  • the fiber body is not limited to carbon fiber, and may be any fiber member (for example, glass fiber, cellulose fiber, etc.) capable of strengthening the resin layer.
  • 1A, 1B, 1Y tube (fiber reinforced resin tube) A few molding machines (molds, molds) 2c Resin pool (space) 3a Recess 10,10X Mandrel 20 First connecting member 30 Second connecting member 50 Resin-containing fiber layer 51 First carbon fiber layer 52 Second carbon fiber layer 53 Third carbon fiber layer 54 Resin 60A, 60B Resin layer 70 Resin ring

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)
PCT/JP2020/025393 2020-06-26 2020-06-26 繊維強化樹脂製管体の製造方法 Ceased WO2021260953A1 (ja)

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CN202080099790.7A CN115427217A (zh) 2020-06-26 2020-06-26 纤维增强树脂制管体的制造方法
DE112020006763.7T DE112020006763T5 (de) 2020-06-26 2020-06-26 Verfahren zur herstellung eines rohrkörpers aus faserverstärktem harz
US17/932,525 US12296548B2 (en) 2020-06-26 2022-09-15 Method for manufacturing tube body made of fiber-reinforced resin

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WO2022065179A1 (ja) * 2020-09-24 2022-03-31 日立Astemo株式会社 繊維強化樹脂管体の製造方法
JP7812206B2 (ja) * 2021-08-25 2026-02-09 Ａｓｔｅｍｏ株式会社 繊維強化樹脂製構造物の製造方法
JP7765259B2 (ja) * 2021-11-18 2025-11-06 Ａｓｔｅｍｏ株式会社 繊維強化樹脂管体の製造方法
JP2023136190A (ja) * 2022-03-16 2023-09-29 日立Astemo株式会社 マンドレル及び繊維強化樹脂管体の製造方法
US20250256473A1 (en) * 2022-03-29 2025-08-14 Hitachi Astemo, Ltd. Carbon-fiber fixation jig, method for manufacturing carbon-fiber reinforced resin pipe body, and power transmission shaft
JP7799537B2 (ja) * 2022-03-29 2026-01-15 Ａｓｔｅｍｏ株式会社 繊維強化樹脂管体の製造方法
JP2024002299A (ja) * 2022-06-23 2024-01-11 日立Astemo株式会社 樹脂注入成形金型装置、炭素繊維強化樹脂管体の製造方法及び炭素繊維強化樹脂管体
WO2024161567A1 (ja) 2023-02-01 2024-08-08 日立Astemo株式会社 繊維強化樹脂製筒体、繊維強化樹脂製筒体の製造方法及び繊維強化樹脂製筒体製造用治具
CN117048087B (zh) * 2023-08-01 2026-04-28 东莞艾可迅复合材料有限公司 一种碳纤维中空管材的制作方法

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JP6873369B1 (ja) 2021-05-19
DE112020006763T5 (de) 2022-12-15

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