WO2023166737A1 - 繊維プリフォーム、繊維プリフォーム前駆体及び繊維プリフォームの製造方法 - Google Patents
繊維プリフォーム、繊維プリフォーム前駆体及び繊維プリフォームの製造方法 Download PDFInfo
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- WO2023166737A1 WO2023166737A1 PCT/JP2022/009552 JP2022009552W WO2023166737A1 WO 2023166737 A1 WO2023166737 A1 WO 2023166737A1 JP 2022009552 W JP2022009552 W JP 2022009552W WO 2023166737 A1 WO2023166737 A1 WO 2023166737A1
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- Prior art keywords
- fiber
- tapered portion
- fiber preform
- circumference
- peripheral side
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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
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
- B29B11/16—Making preforms characterised by structure or composition comprising fillers or 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
- B29C70/06—Fibrous reinforcements only
- B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
- B29C70/083—Combinations of continuous fibres or fibrous profiled structures oriented in one direction and reinforcements forming a two dimensional structure, e.g. mats
- B29C70/085—Combinations of continuous fibres or fibrous profiled structures oriented in one direction and reinforcements forming a two dimensional structure, e.g. mats the structure being deformed in 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
- B29C70/06—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
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two-dimensional [2D] structure
- B29C70/226—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two-dimensional [2D] structure the structure comprising mainly parallel filaments interconnected by a small number of cross threads
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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
- B29C70/06—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
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two-dimensional [2D] structure
- B29C70/228—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two-dimensional [2D] structure the structure being stacked in parallel layers with fibres of adjacent layers crossing at substantial angles
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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
- B29C70/06—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
- B29C70/24—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least three directions forming a three-dimensional [3D] structure
-
- 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
- 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
- B29C70/443—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 and impregnating by vacuum or injection
-
- 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
- B29C70/543—Fixing the position or configuration of fibrous reinforcements before or during 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/681—Component parts, details or accessories; Auxiliary operations
- B29C70/682—Preformed parts characterised by their structure, e.g. form
-
- 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
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
- B29C70/865—Incorporated in coherent impregnated reinforcing layers, e.g. by winding completely encapsulated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
- B32B7/09—Interconnection of layers by mechanical means by stitching, needling or sewing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/20—All layers being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
- B32B2307/737—Dimensions, e.g. volume or area
- B32B2307/7375—Linear, e.g. length, distance or width
Definitions
- the present disclosure relates to a fiber preform for fiber-reinforced plastic, a fiber preform precursor, and a method for manufacturing a fiber preform.
- a sandwich structure with fiber-reinforced plastic as the skin is used, for example, as an end bell structure for a generator.
- a fiber preform that constitutes the convex skin a fiber preform using a Tailored Fiber Placement method (hereinafter referred to as a TFP method) is used in addition to the fiber fabric.
- TFP method Tailored Fiber Placement method
- a fiber preform is manufactured by stitching fiber tows to a base material with fixing threads to integrate them.
- the shaping of the fiber preform into the mold is performed with the fiber tow sewn to the base material with fixing threads. For this reason, when a fiber preform having a curved outer shape is formed into a molding die, excess or shortage of fiber tows may occur with respect to the molding die. Excess or shortage of fiber tows causes the fiber preform to wrinkle. Thus, conventional fiber preforms have a problem of low formability.
- the present disclosure has been made in view of the circumstances described above, and aims to provide a fiber preform, a fiber preform precursor, and a method for manufacturing a fiber preform having high formability.
- the fiber preform of the present disclosure includes a first fiber tow provided in a first region on a substrate and a second region excluding the first region using a water-insoluble fixing yarn. and a securing member straddling the first fiber tow for securing a portion of the first fiber tow to the substrate, the securing member a third fiber tow sewn to the substrate using a water-soluble fixing thread or an adhesive or elastic adhesive, the first fiber tow being changeable relative to each other; can change its position relative to the second area.
- a portion of the fiber tows are secured in the first region in a manner that does not detach from the substrate and allows for changes in relative position to each other. For this reason, the first fiber tows can change their relative positions with each other, and the first regions can change their relative positions with respect to the second region, so that the shapeability can be improved.
- a preform, a fiber preform precursor and a method for manufacturing a fiber preform can be provided.
- FIG. 1 Schematic diagram showing a fiber preform precursor according to Embodiment 1 Partial enlarged view of P1 shown in FIG. Partial enlarged view of P2 shown in FIG. Partial enlarged view of P3 shown in FIG. IID-IID line sectional view shown in FIG. 2C Schematic diagram showing a cross section of the outer peripheral slit shown in FIG. A diagram showing dimensions of the fiber preform precursor according to the first embodiment. Partial enlarged view of Q1 shown in FIG. Partial enlarged view of Q2 shown in FIG. Partial enlarged view of Q3 shown in FIG. FIG. 5 is a partially enlarged view of Q4 shown in FIG. 4; FIG. 2 is a diagram for explaining dimensions after shaping of the fiber preform using the fiber preform precursor according to Embodiment 1. FIG. FIG. FIG.
- FIG. 4 is a diagram for explaining the arrangement of the outer peripheral side slits according to the first embodiment;
- FIG. 4 is a diagram for explaining the arrangement of the inner peripheral side slits according to the first embodiment;
- FIG. 5 is a diagram for explaining arrangement of fixing members in the outer tapered portion according to the first embodiment;
- FIG. 5 is a diagram for explaining the arrangement of fixing members in the inner peripheral tapered portion according to Embodiment 1;
- Schematic diagram of a method for shaping a fiber preform manufactured using the fiber preform precursor according to the first embodiment Schematic diagram showing a fiber preform according to Embodiment 2 Partial enlarged view of S1 shown in FIG. Partial enlarged view of S2 shown in FIG. Partial enlarged view of S3 shown in FIG.
- FIG. 2 Partial enlarged view of S1 shown in FIG. Partial enlarged view of S2 shown in FIG. Partial enlarged view of S3 shown in FIG.
- FIG. 2 Partial enlarged view of S1 shown in FIG. Partial enlarged
- FIG. 10 is a schematic diagram showing a fiber preform precursor according to Embodiment 3; Partial enlarged view of T1 shown in FIG. Partial enlarged view of T2 shown in FIG. Partial enlarged view of T3 shown in FIG. XV-XV line sectional view shown in FIG. 14C
- FIG. 11 is a diagram for explaining the arrangement of fixing members in the outer tapered portion according to the third embodiment
- FIG. 11 is a diagram for explaining arrangement of fixing members in an inner peripheral tapered portion according to Embodiment 3
- FIG. 5 Schematic diagram showing a fiber preform precursor and a method for manufacturing a fiber preform according to Embodiment 5
- Schematic diagram showing a fiber preform precursor and a method for manufacturing a fiber preform according to Embodiment 5 Schematic diagram showing a fiber preform precursor and a method for manufacturing a fiber preform according to Embodiment 5
- Schematic diagram showing a fiber preform precursor and a method for manufacturing a fiber preform according to Embodiment 5 Schematic diagram showing a fiber preform precursor and a method for manufacturing a fiber preform according to Embodiment 5
- Schematic diagram showing a fiber preform precursor and a method for manufacturing a fiber preform according to Embodiment 6 Schematic diagram for explaining a sandwich panel manufacturing method according to the present disclosure
- FIG. 1 is a schematic diagram showing a fiber preform precursor 11 according to Embodiment 1, and FIGS. 2A to 2C are enlarged diagrams of regions P1 to P3 shown in FIG. 1, respectively.
- Fiber preform precursor 11 is manufactured in the process of manufacturing fiber preform 12 according to the second embodiment.
- a fiber preform 12 produced from a fiber preform precursor 11 is used as the convex skin of a part-disc-shaped sandwich panel with a central angle of 90°.
- the fiber preform precursor 11 and the fiber preform 12 are flat in the state and convex after shaping. Partial disc-shaped sandwich panels are also used, for example, as end bells for generators. It should be noted that the angles and shapes of the central angles are not intended to be limited to those described in the embodiments.
- a sandwich panel is manufactured, for example, as follows. As shown in FIG. 25, the fiber preform 12 for the convex skin is placed in the female molding die 131 . By arranging a foam core 121 and a fiber preform 112 for a smooth surface side skin on the fiber preform 12 , the foam core 121 is sandwiched between the fiber preforms 12 and 112 . Next, the foam core 121 and the mold 131 sandwiched between the fiber preforms 12 and 112 are covered with a bagging film 132 . A liquid resin is injected into the space between the mold 131 and the bagging film 132 . A sandwich panel is produced by solidifying the liquid resin.
- the fiber preform precursor 11 includes a base material 21 including a fiber fabric, a central portion 31 including fiber tows and water-insoluble fixing yarns, and an outer peripheral portion including fiber tows and water-soluble fixing yarns.
- the central portion 31, the outer tapered portion 33, the inner tapered portion 34, the outer flange portion 38, and the inner flange portion 39 each have a shape obtained by cutting a part of a ring.
- An outer tapered portion 33 is provided along the outer periphery 31 a of the central portion 31
- an outer flange portion 38 is provided along the outer periphery of the outer tapered portion 33 .
- An inner tapered portion 34 is provided along the inner circumference 31 b of the central portion 31
- an inner flange portion 39 is provided along the inner circumference of the inner tapered portion 34 .
- Side portions 35 and 36 are provided at both ends of the central portion 31 . As shown in FIG.
- the central portion 31 is located on the protruding flat portion of the foam core
- the outer tapered portion 33 is located on the outer peripheral inclined portion of the foam core
- the inner peripheral portion The tapered portion 34 is arranged on the inner peripheral side slope of the foam core
- the outer peripheral side flange portion 38 is arranged on the outer peripheral side flange
- the inner peripheral side flange portion 39 is arranged on the inner peripheral side flange.
- FIG. 4 also shows the dimensions of the fiber preform precursor 11 .
- the outer circumference 33a of the outer circumference tapered portion 33 is arc-shaped with the point O as the center and the outer diameter Ro .
- the inner periphery 33b of the outer tapered portion 33 has an arcuate shape with an inner diameter R i with the point O as the center.
- the outer circumference 34a of the inner circumference tapered portion 34 is arcuate with the point O as the center and the outer diameter ro .
- An inner circumference 34b of the inner circumference tapered portion 34 is arcuate with an inner diameter ri centering on the point O. As shown in FIG.
- the dimensions of the central portion 31, the outer tapered portion 33, and the inner tapered portion 34 after shaping the fiber preform 12 are shown.
- the height of the outer circumference 31a of the central portion 31 is indicated by H
- the height of the inner circumference 31b of the central portion 31 after shaping is indicated by h.
- the height H and the height h are equal because the height of the central portion 31 is constant between the inner and outer peripheral sides.
- the fiber preform 12 according to Embodiment 2 manufactured using the fiber preform precursor 11 shown in FIG. 1 is shaped using a shaping die 60 as shown in FIG. As shown in FIG. 10, the shaping die 60 has conical surfaces 61,62.
- the outer tapered portion 33 of the fiber preform precursor 11 is formed along the conical surface 61 and the inner tapered portion 34 is formed along the conical surface 62 to form a conical surface. Therefore, the outer tapered portion 33 and the inner tapered portion 34 have a tapered shape after being formed into a sandwich panel shape. Therefore, the state of the fiber preform precursor 11 shown in FIG. 1 is not slanted and has a flat shape.
- a fiber fabric can be used as the base material 21 .
- fibers glass fibers, carbon fibers, or para-aramid fibers can be used, and in addition, organic fibers such as polyester fibers can also be used.
- Fiber tows are sewn on part of the base material 21 with water-soluble or water-insoluble fixing threads.
- the fixed thread can include a needle thread and a bobbin thread. 1, a plurality of dashed-line-like outer peripheral slits 23 and inner peripheral slits 23 are formed in a portion of the base material 21 where the outer peripheral tapered portion 33 and the inner peripheral tapered portion 34 are provided. A slit 24 is provided.
- the fiber tow is made of glass fiber, carbon fiber or para-aramid fiber. Fiber tows may be formed from organic fibers, such as polyester fibers.
- the fiber tows secured to the substrate 21 using the water-soluble fixing yarns 56 are referred to herein as the first fiber tows 51, and the fiber tows secured to the substrate 21 using the water-insoluble fixing yarns 57. is referred to as second fiber tow 52 .
- a securing member 40 is provided across the first fiber tow 51 to partially secure the first fiber tow 51 .
- a fiber tow and a water-insoluble fixing thread are used as the fixing member 40 .
- the fiber tow used as the fixing member 40 is called a third fiber tow 53 .
- a region of the base material 21 where the first fiber tows 51 are provided is called a first region.
- a region other than the first region and in which the second fiber tows 52 are provided is called a second region.
- the first fiber tow 51, the second fiber tow 52, and the third fiber tow 53 may all be formed from the same material. Alternatively, any two of the first fiber tow 51, the second fiber tow 52 and the third fiber tow 53 may be formed from the same material, or all may be formed from different materials. may
- the first fiber tow 51 is fixed to the substrate 21 using a water-soluble fixing thread 56, as shown in FIG. 2A. Specifically, as shown in FIG. 2D, the first fiber tow 51 is secured to the substrate 21 by stitching using a water-soluble top thread 56a and bobbin thread 56b.
- the water-soluble fixing thread 56 can be removed with water, for example by soaking or by spraying with water.
- a material for the water-soluble fixing thread 56 a material that can be dissolved in water can be used, such as vinylon.
- the second fiber tow 52 is fixed to the substrate 21 using a water-insoluble fixing thread 57, as shown in FIG. 2B.
- a second fiber tow 52 is also sewn to the substrate 21 by water-insoluble top and bobbin threads, similar to FIG. 2D.
- Glass fiber, carbon fiber, or para-aramid fiber can be used as the material of the water-insoluble fixing thread 57 .
- Organic fibers such as polyester fibers or nylon fibers can also be used.
- the third fiber tows 53 are provided across the respective first fiber tows 51, as shown in FIG. 2C. Also, the third fiber tow 53 is fixed to the substrate 21 by a water-insoluble fixing thread 58 . A third fiber tow 53 is also sewn to substrate 21 by water-insoluble top thread 58a and bobbin thread 58b as shown in FIG. 2D. As a result, each first fiber tow 51 is secured to the substrate 21 at the portion where the third fiber tow 53 is provided.
- the water-insoluble fixing thread 58 the same material as the water-insoluble fixing thread 57 for fixing the first fiber tow 51 may be used, or a different material may be used.
- the first fiber tows 51 are attached to the outer tapered portion 33 and the inner tapered portion 34 as shown in FIG.
- Three fiber tows 53 are provided. Therefore, in the base material 21, the region where the outer peripheral side tapered portion 33 and the inner peripheral side tapered portion 34 are provided corresponds to the first region.
- the second of fiber tows 52 are secured to the substrate using water-insoluble securing yarns 57 . Therefore, in the base material 21, the central portion 31, the outer peripheral flange portion 38, the inner peripheral flange portion 39, and the side portions 35 and 36 correspond to the second region.
- the third fiber tow 53 is provided extending from the outer circumference 33a of the outer circumference side tapered portion 33 toward the inner circumference 33b or from the inner circumference 33b toward the outer circumference 33a.
- the third fiber tow 53 is continuous, and one third fiber tow 53 crosses the outer tapered portion 33 or the inner tapered portion 34 a plurality of times. , but the present disclosure is not intended to be limited thereto.
- a plurality of third fiber tows 53 are prepared, and each third fiber tow 53 is arranged from the outer circumference 33a toward the inner circumference 33b of the outer circumference side tapered portion 33 or from the inner circumference 33b toward the outer circumference 33a. It is also possible to let The same applies to the inner peripheral tapered portion 34 .
- the water-soluble fixing thread 56 can be dissolved and removed with water when manufacturing the fiber preform 12 from the fiber preform precursor 11 .
- the first fiber tow 51 is fixed at the portion where the third fiber tow 53 overlaps.
- the relative position between the first fiber tows 51 can be varied, so that the first region where the first fiber tows 51 are provided and the second region where the second fiber tows 52 are provided. Since the relative position with respect to the region can be changed, the formability can be improved.
- relative position refers to angle or position, or both.
- the outer peripheral flange portion 38 is rotated in the circumferential direction of the shaping mold 60 in the direction of the arrow shown in FIG. can also be shaped.
- the inner peripheral side tapered portion 34 and in order to make it follow the conical surface 62 of the shaping die 60, the inner peripheral side flange portion 39 is rotated in the circumferential direction of the shaping die 60 in the direction of the arrow shown in FIG. It can be shaped.
- the outer peripheral side flange portion 38 in order to rotate the outer peripheral side flange portion 38 in the circumferential direction of a circle having a radius Ro centering on the center O at the time of shaping, the outer peripheral side flange portion 38 has a radius Ro centering on the point O. It is preferable to rotate and displace in the circumferential direction of the circle in the direction opposite to the direction of the force applied during shaping.
- the outer peripheral flange portion 38 is rotated by the height H of the outer peripheral portion 31a of the central portion 31 after shaping in the circumferential direction of a circle having a radius Ro centering on the point O.
- the rotation circumferential length which is the length by which the outer peripheral flange portion 38 is rotated in the circumferential direction, is the same as the height H of the outer periphery 31a of the central portion 31 after shaping.
- the degree to which the outer flange portion 38 is rotated can also be defined by the angle ⁇ R determined by equation (1.1).
- Ro is the diameter of the outer circumference 33a of the outer circumference side tapered portion 33
- H is the height of the outer circumference 31a of the central portion 31 after shaping.
- BB' is the rotational circumference
- AB is the width of the outer tapered portion.
- ABB' can be regarded as a right triangle.
- the inner peripheral flange portion 39 is the same as the outer peripheral flange portion 38, and the height of the inner peripheral portion 31b of the central portion 31 after shaping in the circumferential direction of a circle with a radius ri centered at the point O It is preferable to arrange them by rotating them by h. At this time, it is preferable that the rotational circumferential length, which is the length by which the inner circumferential flange portion 39 is rotated in the circumferential direction, is the same as the height h of the inner circumferential portion 31b of the central portion 31 after shaping.
- the angle ⁇ r determined by equation (1.2).
- DD' is the rotation circumference
- CD is the width of the inner circumference tapered portion. Since r o is large with respect to h, it can be considered that the rotation perimeter extends tangentially and makes a right angle to a line drawn from the center O, as shown in FIG. 6B. Therefore, the angle can be defined as in equation (1.2). Also, CDD' can be regarded as a right triangle.
- the outer peripheral side flange portion 38 and the inner peripheral side flange portion 39 are rotated in the direction indicated by the arrow in FIG. 10, rightward in FIG.
- the angle by which the outer peripheral flange portion 38 is rotated is the above ⁇ R
- the angle by which the inner peripheral flange portion 39 is rotated is the above ⁇ r .
- the outer peripheral flange portion 38 and the inner peripheral flange portion 39 are arranged as described above, the outer peripheral flange portion 38 is placed along the circumference of the radius Ro centering on the point O at the time of shaping - ⁇ R only rotate.
- B' moves to the position of B and lies on a line extending from point O through point A, as shown in FIG. 6A.
- D′ moves to the position of D as shown in FIG. 6B, and the point It lies on a line extending from O through point C.
- the distance between AB' is and the distance between CD' is is is.
- FIG. 7 is a diagram schematically showing the height of the central portion 31 after shaping, and the ridgelines of the outer peripheral tapered portion 33 and the inner peripheral tapered portion 34 .
- the height of the outer circumference 31a of the central portion 31 after shaping is H
- the height of the inner circumference 31b of the central portion 31 after shaping is h.
- the distance between E'F is the difference between the outer diameter Ro and the inner diameter Ri of the outer tapered portion, so the length of the edge line EF of the outer tapered portion is AB' in FIG. 6A.
- the length of the ridge line JK is equal to the distance between CD′ in FIG. 6B. Due to this relationship, the outer peripheral tapered portion 33 and the inner peripheral tapered portion 34 of the fiber preform 12 manufactured using the fiber preform precursor 11 correspond to the outer periphery of the disk-shaped sandwich panel forming die 60 shown in FIG.
- the conical surface 61 on the side and the conical surface 62 on the inner peripheral side can be satisfactorily shaped while suppressing the occurrence of wrinkles.
- the outer peripheral side slit 23 and the inner peripheral side slit 24 are provided in the first region where the first fiber tow 51 on the base material 21 is provided.
- the outer peripheral slit 23 is provided in a region where the outer peripheral tapered portion 33 and the inner peripheral tapered portion 34 on the base material 21 are provided.
- the outer peripheral side slit 23 and the inner peripheral side slit 24 are formed in a broken line shape.
- the outer peripheral side slit 23 provided in the outer peripheral side taper portion 33 is formed extending from the outer periphery 33a of the outer peripheral side taper portion 33 toward the inner periphery 33b as shown in FIG.
- the inner peripheral slit 24 provided in the inner peripheral tapered portion 34 is formed so as to extend from the outer periphery 34a of the inner peripheral tapered portion 34 toward the inner periphery 34b.
- the outer peripheral side slit 23 and the inner peripheral side slit 24 do not overlap the fixing member 40 .
- the substrate 21 will be misaligned during the process of sewing the first fiber tow 51, resulting in poor shaping or workability. sexuality worsens.
- the outer peripheral side slit 23 and the inner peripheral side slit 24 in a dashed line shape as in the present embodiment, when the first fiber tow 51 is sewn onto the base material 21, It is possible to suppress the occurrence of wrinkles or misalignment.
- the outer peripheral slit 23 has a plurality of linear openings 23a, the openings 23a having an opening width Lo and arranged linearly at a pitch Lp.
- the length Lo of the openings 23a and the pitch Lp of the openings 23a of the broken-line outer peripheral slits 23 shown in FIG. 3 can be set arbitrarily. It is desirable to set the dimension so that the adjacent openings 23a are connected by cutting the openings 23a during shaping. A region sandwiched between adjacent slits can undergo shear deformation in the circumferential direction. As a result, the outer tapered portion 33 and the inner tapered portion 34 can be satisfactorily shaped along the conical surfaces 61 and 62 of the shaping mold 60 .
- outer peripheral side slit 23 and the inner peripheral side slit 24 may be formed in any direction on the base material 21, but it is desirable that the outer peripheral side slit 23 and the inner peripheral side slit 24 satisfy the following relationship.
- the outer peripheral slit 23 is formed extending from the outer periphery 33a of the outer peripheral tapered portion 33 toward the inner periphery 33b.
- the outer peripheral slit 23 is formed on the line Dso as shown in FIG. 8A.
- a line D so corresponding to the direction in which the outer peripheral slit 23 extends forms an angle ⁇ SR determined by the formula (1.3) with a line extending from the point O to the intersection point where the line D so intersects the inner periphery 33b. is preferred.
- the inner peripheral slit 24 is formed extending from the outer periphery 34a of the inner peripheral tapered portion 34 toward the inner periphery 34b, as shown in FIG. 8B. Moreover, the inner peripheral side slit 24 is formed on the line Dsi as shown in FIG. 8B.
- the line Dsi corresponding to the direction in which the inner peripheral side slit 24 extends forms an angle ⁇ Sr determined by the formula (1.4) between the line Dsi extending from the point O to the intersection point where the line Dsi intersects the outer periphery 34a. It is preferable to make In FIG.
- the fiber preform 12 manufactured using the fiber preform precursor 11 is formed by shearing deformation of the base material 21 positioned between the adjacent slits during the shaping process.
- the tapered portion 34 can be formed into a conical surface without wrinkles.
- the angle at which the fixing member 40 is arranged in the outer tapered portion 33 preferably satisfies the following.
- the fixing member 40 is arranged on the line Dfo as shown in FIG. 9A.
- a point of intersection where this line Dfo intersects the inner periphery 33b of the outer tapered portion 33 is determined. It is preferable that the line connecting this intersection from point O and the line D fo form the ⁇ SR direction determined by equation (1.5).
- the intersection point where the line Dfo intersects the inner periphery 33b of the outer tapered portion 33 corresponds to point A.
- FIG. 9A the intersection point where the line Dfo intersects the inner periphery 33b of the outer tapered portion 33 corresponds to point A.
- the angle at which the fixing member 40 is arranged in the inner tapered portion 34 preferably satisfies the following.
- the fixing member 40 is arranged on the line D fi as shown in FIG. 9B.
- a point at which this line Dfi intersects the outer circumference 34a of the inner circumference tapered portion 34 is determined. It is preferable that the line connecting the point O and the line D fi form the ⁇ Sr direction determined by the equation (1.6).
- the point where the line Dfo intersects with the outer circumference 34a of the inner circumference tapered portion 34 corresponds to C.
- the fixing member 40 arranged as described above can be the same as the length of the edge EF in .
- the length of the fixing member 40 at the inner tapered portion 34 can be the same as the length of the ridgeline JK. Therefore, the first fiber tow 51 is fixed while allowing a change in relative position, and the portion of the first fiber tow 51 restrained by the fixing member 40 is tapered on the outer peripheral side after shaping. They can be arranged on the same ridge line on the conical surface of the portion 33 . Therefore, the outer tapered portion 33 and the inner tapered portion 34 can be favorably shaped into conical surfaces.
- FIG. 2 A fiber preform 12 according to Embodiment 2 is shown in FIG.
- the fiber preform 12 of this embodiment is manufactured using the fiber preform precursor 11 according to the first embodiment.
- 12A to 12C are partial enlarged views of regions S1 to S3 shown in FIG.
- Features common to those of the first embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.
- the portion of the base material 21 where the fiber tow is not provided is cut off. Specifically, in the region where the central portion 31, the outer peripheral side tapered portion 33, the inner peripheral side tapered portion 34, the side portions 35 and 36, the outer peripheral side flange portion 38, and the inner peripheral side flange portion 39 are provided, Material 21 remains.
- the water-soluble fixing thread 56 that fixes the first fiber tow 51 to the substrate 21 is removed from the outer tapered portion 33 and the inner tapered portion 34. ing. Also, a portion of the first fiber tow 51 is fixed to the substrate 21 by a fixing member 40 .
- the second fiber tow 52 is fixed to the base material 21 by water-insoluble fixing threads 57 in the central portion 31 .
- the second fiber tows 52 are fixed to the base material 21 by water-insoluble fixing threads 57 at the outer tapered portion 33 , the inner tapered portion 34 , and the side portions 35 and 36 .
- the first fiber tows 51 can change their relative positions in the outer tapered portion 33 and the inner tapered portion 34 .
- the fixing member 40 since a part of the first fiber tow 51 is fixed by the fixing member 40 , the separation of the first fiber tow 51 from the base material 21 can be prevented. Therefore, the shapeability of the fiber preform 12 can be improved. This is particularly advantageous when shaping the fiber preform into a shape with curved surfaces.
- the outer peripheral flange portion 38, the inner peripheral flange portion 39, the outer peripheral slit 23, the inner peripheral slit 24, and the fixing member 40 have the characteristics described in the first exemplary embodiment. .
- the outer tapered portion 33 and the inner tapered portion 34 can be shaped more favorably into conical surfaces.
- a fiber preform precursor 13 according to Embodiment 3 will be described with reference to FIG.
- the fiber preform precursor 13 of this embodiment is manufactured in the process of manufacturing the fiber preform 14 according to Embodiment 4, which will be described later.
- the fiber preform precursor 13 of this embodiment differs from the above-described first and second embodiments in that the fixing member 41 is made of adhesive or elastic adhesive. Features common to those of the first embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.
- the fiber preform precursor 13 of the present embodiment includes a base material 21, a central portion 31, an outer peripheral tapered portion 33, an inner peripheral tapered portion 34, side portions 35 and 36, and an outer peripheral portion.
- a flange portion 38 and an inner peripheral side flange portion 39 are provided.
- the first fiber tow 51 is fixed by a water-soluble fixing thread 56 in the outer tapered portion 33 and the inner tapered portion 34, and the central portion 31, the side portions 35 and 36, the outer peripheral flange portion 38, and the inner peripheral portion
- a second fiber tow 52 is fixed to the side flange portion 39 by a water-insoluble fixing thread 57 .
- the outer peripheral side slit 23 and the inner peripheral side slit 24 are also provided in the same manner as in the first embodiment.
- first fiber tow 51 is fixed to the base material 21 using a water-soluble fixing thread 56, as shown in FIG. 14A.
- the second fiber tows 52 are also secured to the substrate 21 using water-insoluble securing threads 57, as shown in FIG. 14B.
- the fixing member 41 is provided from the outer circumference 33a of the outer circumference side tapered portion 33 toward the inner circumference 33b or from the inner circumference 33b toward the outer circumference 33a.
- the fixing member 41 extends from the outer periphery 34a of the inner tapered portion 34 toward the inner periphery 34b or from the inner periphery 34b toward the outer periphery 34a.
- fixing members 41 are provided across the respective first fiber tows 51 . Each first fiber tow 51 is fixed to the substrate 21 at the portion where the fixing member 41 is provided.
- an adhesive or a flexible elastic adhesive such as silicone resin is used as the fixing member 41.
- FIG. 15 is a cross-sectional view along line XV-XV shown in FIG. 14C. As shown in FIG. 15 , the fixing member 41 also exists between adjacent first fiber tows 51 to fix the first fiber tows 51 to the substrate 21 .
- the fixing member 41 restrains the first fiber tow 51 at the outer tapered portion 33 and the inner tapered portion 34 to prevent separation from the base material 21 . can be done.
- the arrangement of the fixing member 41 in the outer tapered portion 33 and the inner tapered portion 34 is arbitrary.
- the angle at which the fixing member 41 is arranged in the outer tapered portion 33 preferably satisfies the following.
- the fixing member 41 is arranged on the line Dfo as shown in FIG. 16A.
- This line Dfo determines the point of intersection with the inner circumference 33b of the outer circumference tapered portion 33 .
- This point is point A in FIG. 16A. It is preferable that the line connecting this intersection from point O and the line D fo form the ⁇ SR direction determined by equation (1.5).
- the angle at which the fixing member 41 is arranged in the inner peripheral tapered portion 34 preferably satisfies the following.
- the fixing member 41 is arranged on the line D fi .
- the intersection point where this line Dfi intersects with the outer circumference 34a of the inner circumference tapered portion 34 is determined. This intersection point is point C in FIG. 16B. It is preferable that the line connecting this intersection from point O and the line D fi form the ⁇ Sr direction determined by equation (1.6).
- the fixing member 41 arranged as described above can be the same as the length of the edge EF in .
- the outer peripheral flange portion 38 and the inner peripheral flange portion 39 also have the same features as in the first embodiment. Furthermore, it is preferable that the outer peripheral side slit 23 and the inner peripheral side slit 24 also have the same characteristics as in the first embodiment.
- FIG. 4 A fiber preform 14 according to Embodiment 4 is shown in FIG.
- the fiber preform 14 of this embodiment is manufactured using the fiber preform precursor 13 according to the third embodiment.
- 18A to 18C are partial enlarged views of regions U1 to U3 shown in FIG.
- Features common to the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the base material 21 is cut off at the portion where the fiber tow is not provided.
- the second fiber tow 52 is fixed by a water-insoluble fixing thread 57 in the central portion 31 .
- the water-soluble fixing thread 56 fixing the first fiber tow 51 to the base material 21 is removed.
- the fixing member 41 may exist also on the water-soluble fixing thread 56 . The water-soluble fixing threads 56 are removed by water when the fiber preform 14 is manufactured, but the water-soluble fixing threads 56 located under the fixing member 41 may remain in the fiber preform 14 .
- the first fiber tows 51 can change their relative positions in the outer tapered portion 33 and the inner tapered portion 34 .
- the fixing member 41 since a part of the first fiber tow 51 is fixed by the fixing member 41 , the separation of the first fiber tow 51 from the base material 21 can be prevented. Therefore, the shapeability of the fiber preform 14 can be improved. This is particularly advantageous when shaping the fiber preform into a shape with curved surfaces.
- the outer peripheral flange portion 38, the inner peripheral flange portion 39, the outer peripheral slit 23, the inner peripheral slit 24, and the fixing member 41 have the features described in the first and third exemplary embodiments. is preferred. As a result, the outer tapered portion 33 and the inner tapered portion 34 can be shaped more favorably into conical surfaces.
- a broken-line outer peripheral slit 23 is formed in a region on the base material 21 where the outer peripheral tapered portion 33 is to be provided.
- an inner peripheral slit 24 is formed in a region on the substrate 21 where the inner peripheral tapered portion 34 is to be formed.
- the first fiber tow 51 is sewn with a water-soluble fixing thread 56 to the area where the inner peripheral tapered portion 34 is to be provided.
- the second fiber tow 52 is sewn on the area of the base material 21 where the first fiber tow 51 is not provided with the water-insoluble fixing thread 57 .
- a second fiber tow 52 is sewn onto the region where the central portion 31, the side portions 35 and 36, the outer peripheral side flange portion 38, and the inner peripheral side flange portion 39 are provided. .
- a fixing member 40 is provided straddling the first fiber tow 51 .
- the third fiber tow 53 is sewn onto the first fiber tow 51 with a water-insoluble fixing thread 58 using a known automatic sewing machine or embroidery machine.
- the fiber preform precursor 11 is manufactured.
- the outer flange portion 38, the inner flange portion 39, the outer slit 23, the inner slit 24, or the fixing member 40 may be formed so as to satisfy the conditions described in the first embodiment.
- the water-soluble fixed threads in the fiber preform precursor 11 are removed with water.
- the fiber preform precursor 11 is immersed in water to dissolve the water-soluble fixing threads.
- Water may be sprayed onto the fiber preform precursor 11 to dissolve and remove the water-soluble fixing threads. Further, unnecessary portions of the base material 21 may be cut and removed.
- the fiber preform 12 can be manufactured through the above steps.
- a portion of the fiber tow is fixed by a method that does not separate from the base material and allows the relative position to change. Therefore, it is possible to improve the formability.
- the manufacturing method of the present embodiment since the first fiber tow 51 is fixed by the water-soluble fixing thread, it can be easily removed with water. Therefore, it is possible to manufacture a fiber preform capable of improving shapeability.
- it is not necessary to notch the fiber tow for improving the formability it is possible to suppress a decrease in the rigidity of the molded product.
- the process of forming the outer peripheral side slit 23 and the inner peripheral side slit 24, the process of sewing the first fiber tow 51, and the process of sewing the second fiber tow 52 are performed in the same manner as in the fifth embodiment.
- the outer peripheral flange portion 38, the inner peripheral flange portion 39, the outer peripheral slit 23, the inner peripheral slit 24, and the fixing member 41 are arranged so as to satisfy the conditions described in the first or third exemplary embodiment. may be formed.
- a fixing member 41 is provided straddling the first fiber tow 51 .
- the fixing member 41 is applied to the first fiber tow 51 fixed by the water-soluble fixing thread 56 using an applicator such as a dispenser, and the first fiber tow 51 is adhered to the base material 21 .
- an applicator such as a dispenser
- the first fiber tow 51 is adhered to the base material 21 .
- a curing process is provided after application.
- the fiber preform precursor 13 is manufactured.
- the water-soluble fixing threads 56 in the fiber preform precursor 13 are removed with water. Specifically, the fiber preform precursor 13 is immersed in water to dissolve the water-soluble fixing threads 56 . Water may be sprayed onto the fiber preform precursor 13 to dissolve and remove the water-soluble fixing threads 56 . Note that the water-soluble fixing thread 56 under the fixing member 41 may remain without being dissolved. Moreover, an unnecessary portion of the base material 21 may be cut off as necessary.
- the fiber preform 14 can be manufactured through the above steps.
- a portion of the fiber tow is fixed by a method that does not separate from the base material and allows the relative position to change. Therefore, it is possible to improve the formability.
- the manufacturing method of the present embodiment since the first fiber tow 51 is fixed by the water-soluble fixing thread, it can be easily removed with water. Therefore, it is possible to manufacture a fiber preform capable of improving shapeability.
- it is not necessary to notch the fiber tow for improving the formability it is possible to suppress a decrease in the rigidity of the molded product.
- Embodiments 1 and 3 when the conditions described in the formulas are satisfied for the outer peripheral flange portion 38, the inner peripheral flange portion 39, the outer peripheral slit 23, the inner peripheral slit 24, and the fixing members 40 and 41. was described as an example. The present disclosure does not intend to include all of these conditions, and a configuration including only any one of these conditions is also included in the present disclosure.
- the fiber preform precursor and the fiber preform for a partial disk-shaped sandwich panel having a central angle of 90° have been described as examples, but the present disclosure is limited to the configurations described above. not intended to For example, it is possible to change the angle or shape of the central angle.
- a configuration is also possible in which both the outer peripheral tapered portion 33 and the inner peripheral tapered portion 34 are not provided, and only one of them is provided. For example, when forming in a truncated cone shape, it is sufficient if the outer peripheral side tapered portion 33 is formed.
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Abstract
Description
図1は、実施の形態1に係る繊維プリフォーム前駆体11を示す模式図であり、図2A~2Cは、それぞれ図1に示す領域P1~P3の拡大図である。繊維プリフォーム前駆体11は、実施の形態2に係る繊維プリフォーム12を製造する過程で製造される。繊維プリフォーム前駆体11から製造される繊維プリフォーム12は、中心角が90°である部分円盤状のサンドイッチパネルの凸側表皮として使用される。繊維プリフォーム前駆体11、繊維プリフォーム12の状態では、平坦であり、賦形後に凸型とされる。また、部分円盤状サンドイッチパネルは、例えば発電機のエンドベルとして使用される。なお、中心角の角度、形状は、実施の形態に記載の構成に限ることを意図するものではない。
であり、CD’間の距離は、
である。
実施の形態2に係る繊維プリフォーム12を図11に示す。本実施の形態の繊維プリフォーム12は、実施の形態1に係る繊維プリフォーム前駆体11を用いて製造される。また、図12A~12Cは図11に示す領域S1~S3の部分拡大図である。実施の形態1と共通する特徴については、同一の符号を付し、詳細な説明を省略する。
実施の形態3に係る繊維プリフォーム前駆体13について、図13を用いて説明する。本実施の形態の繊維プリフォーム前駆体13は、後述する実施の形態4による繊維プリフォーム14を製造する過程で製造されるものである。本実施の形態の繊維プリフォーム前駆体13が上述した実施の形態1及び2と異なる点は、固定部材41として、粘着剤又は弾性接着剤が使用される点にある。実施の形態1と共通する特徴については同一の符号を付し、詳細な説明は省略する。
実施の形態4に係る繊維プリフォーム14を図17に示す。本実施の形態の繊維プリフォーム14は、実施の形態3に係る繊維プリフォーム前駆体13を用いて製造される。また、図18A~18Cは図17に示す領域U1~U3の部分拡大図である。上述した実施の形態と共通する特徴については、同一の符号を付し、詳細な説明を省略する。
実施の形態5に係る繊維プリフォーム12の製造方法について、図を用いて説明する。
実施の形態6に係る繊維プリフォーム14の製造方法について、図を用いて説明する。
Claims (12)
- 基材上の第1の領域に設けられた第1の繊維トウと、前記第1の領域を除く第2の領域に、非水溶性の固定糸を用いて前記基材に縫い付けられた第2の繊維トウと、前記第1の繊維トウの一部を前記基材に固定するため、前記第1の繊維トウをまたいで設けられた固定部材とを備え、
前記固定部材は、非水溶性の固定糸を用いて前記基材に縫い付けられた第3の繊維トウである又は粘着剤若しくは弾性接着剤であり、
前記第1の繊維トウは互いの相対位置を変更可能であり、
前記第1の領域は、前記第2の領域に対する相対位置を変更可能である、
繊維プリフォーム。 - 前記繊維プリフォームは、円錐面状に賦形される外周側テーパー部を有し、
前記外周側テーパー部は、前記第1の領域に形成される、
請求項1に記載の繊維プリフォーム。 - 前記外周側テーパー部の内周に沿って配置される中央部と、前記外周側テーパー部の外周に沿って配置された外周側フランジ部とを更に備え、
前記外周側テーパー部は、前記外周側フランジ部を周方向に回転させて成形型に沿わせることで円錐面状に賦形され、前記外周側フランジ部は、賦形時に回転させる方向とは反対方向に、賦形後の中央部の外周側の高さと同じ長さだけ回転させて配置される、
請求項2に記載の繊維プリフォーム。 - 前記外周側テーパー部は、点Oを中心とする外径Roの外周及び点Oを中心とする内径Riの内周を有し、
前記外周側テーパー部の内周に沿って配置される中央部を備え、賦形後の前記中央部の外周側の高さはHであり、
前記基材の前記外周側テーパー部が設けられる領域には破線状のスリットが設けられており、前記スリットは、前記外周側テーパー部の外周から内周に向かって線Dso上に延びて形成されており、前記線Dsoは、中心Oから前記線Dsoが前記外周側テーパー部の内周と交わる点まで延ばした線に対して、以下の式(1.3)によって定まる角度θSRをなす、
請求項2又は3に記載の繊維プリフォーム。 - 前記外周側テーパー部は、点Oを中心とする外径Roの外周及び点Oを中心とする内径Riの内周を有し、
前記外周側テーパー部の内周に沿って配置される中央部を備え、賦形後の前記中央部の外周側の高さはHであり、
前記固定部材は、前記外周側テーパー部の外周から内周に向かって線Dfo上に延びており、前記線Dfoは、中心Oから前記線Dfoが前記外周側テーパー部の内周と交わる点まで延ばした線に対して、以下の式(1.5)によって定まる角度θSRをなす、
請求項2から4のいずれか1項に記載の繊維プリフォーム。 - 前記繊維プリフォームは、円錐面状に賦形される内周側テーパー部を有し、
前記内周側テーパー部は、前記第1の領域に形成される、
請求項1から5のいずれか1項に記載の繊維プリフォーム。 - 前記内周側テーパー部の外周に沿って配置される中央部と、前記内周側テーパー部の内周に沿って配置された内周側フランジ部とを更に備え、
前記内周側テーパー部は、前記内周側フランジ部を周方向に回転させて成形型に沿わせることで前記内周側フランジ部は、賦形時に回転させる方向とは反対方向に、賦形後の中央部の内周側の高さhと同じ長さだけ回転させて配置される、
請求項6に記載の繊維プリフォーム。 - 前記内周側テーパー部は、点Oを中心とする外径roの外周及び点Oを中心とする内径riの内周を有し、
前記内周側テーパー部の外周に沿って配置される中央部を備え、賦形後の前記中央部の前記内周側テーパー部側の高さはhであり、
前記基材の前記内周側テーパー部が設けられる領域には破線状のスリットが設けられており、前記スリットは、前記内周側テーパー部の外周から内周に向かって線Dsi上に延びており、前記線Dsiは、中心Oから前記線Dsiが前記内周側テーパー部の外周と交わる点まで延ばした線に対して、以下の式(1.4)によって定まる角度θSrをなす、
請求項6又は7に記載の繊維プリフォーム。 - 前記内周側テーパー部は、点Oを中心とする外径roの外周及び点Oを中心とする内径riの内周を有し、
前記内周側テーパー部の外周に沿って配置される中央部を備え、賦形後の前記中央部の内周側の高さはhであり、
前記固定部材は、前記内周側テーパー部の外周から内周に向かって線Dfi上に延びており、前記線Dfiは、中心Oから前記線Dfiが前記内周側テーパー部の外周と交わる点まで延ばした線に対して、以下の式(1.6)によって定まる角度θSrをなす、
請求項6から8のいずれか1項に記載の繊維プリフォーム。 - 前記基材の前記第1の領域には破線状のスリットが設けられており、
前記スリットは直線状に並んで配置された複数の開口部を備え、
賦形時に、前記基材の剪断変形によって隣り合う前記開口部間の前記基材が切断されて、隣り合う前記開口部同士がつながる、
請求項1から9のいずれか1項に記載の繊維プリフォーム - 請求項1から10のいずれか1項に記載の繊維プリフォームを製造するための繊維プリフォーム前駆体であって、
前記第1の繊維トウは、水溶性の固定糸を用いて前記基材に縫い付けられている、
繊維プリフォーム前駆体。 - 基材の第1の領域に水溶性の固定糸を用いて第1の繊維トウを縫い付ける工程と、前記第1の領域を除く第2の領域に、非水溶性の固定糸を用いて第2の繊維トウを縫い付ける工程と、前記第1の繊維トウの一部を前記基材に固定するために、前記第1の繊維トウをまたいで設けられた固定部材を設ける工程と、を含む繊維プリフォーム前駆体を製造する工程と、
前記繊維プリフォーム前駆体中の前記水溶性の固定糸を水によって溶解させて除去する工程と、を含み、
前記固定部材は、非水溶性の固定糸を用いて前記基材に縫い付けられた第3の繊維トウである、又は粘着剤若しくは弾性接着剤であり、前記第1の繊維トウは互いの相対位置を変更可能であり、前記第1の領域は、前記第2の領域に対する相対位置を変更可能である、
繊維プリフォームの製造方法。
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| CN202280092894.4A CN118829531A (zh) | 2022-03-04 | 2022-03-04 | 纤维预制件、纤维预制件前体以及纤维预制件的制造方法 |
| US18/839,463 US20250162277A1 (en) | 2022-03-04 | 2022-03-04 | Fiber preform, fiber preform precursor, and method for manufacturing fiber preform |
| PCT/JP2022/009552 WO2023166737A1 (ja) | 2022-03-04 | 2022-03-04 | 繊維プリフォーム、繊維プリフォーム前駆体及び繊維プリフォームの製造方法 |
| JP2024504329A JP7693087B2 (ja) | 2022-03-04 | 2022-03-04 | 繊維プリフォーム、繊維プリフォーム前駆体及び繊維プリフォームの製造方法 |
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| US20250162277A1 (en) | 2025-05-22 |
| JP7693087B2 (ja) | 2025-06-16 |
| EP4488021A1 (en) | 2025-01-08 |
| JPWO2023166737A1 (ja) | 2023-09-07 |
| CN118829531A (zh) | 2024-10-22 |
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