WO2017006989A1 - 繊維強化樹脂成形材料の製造方法及び製造装置 - Google Patents
繊維強化樹脂成形材料の製造方法及び製造装置 Download PDFInfo
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- WO2017006989A1 WO2017006989A1 PCT/JP2016/070117 JP2016070117W WO2017006989A1 WO 2017006989 A1 WO2017006989 A1 WO 2017006989A1 JP 2016070117 W JP2016070117 W JP 2016070117W WO 2017006989 A1 WO2017006989 A1 WO 2017006989A1
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- fiber
- fiber bundle
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- reinforced resin
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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
-
- 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
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
- B29B15/125—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex by dipping
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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
- B29B11/02—Making preforms by dividing preformed material, e.g. sheets, rods
-
- 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
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
-
- 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
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/14—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length of filaments or wires
-
- 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
-
- 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
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/504—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands
- B29C70/506—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands and impregnating by melting a solid material, e.g. sheet, powder, fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
- B65H35/0073—Details
- B65H35/008—Arrangements or adaptations of cutting devices
- B65H35/0086—Arrangements or adaptations of cutting devices using movable cutting elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
- B65H35/08—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with revolving, e.g. cylinder, cutters or perforators
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D11/00—Other features of manufacture
- D01D11/02—Opening bundles to space the threads or filaments from one another
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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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
-
- 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
- B29K2031/00—Use of polyvinylesters or derivatives thereof as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2307/00—Use of elements other than metals as reinforcement
- B29K2307/04—Carbon
Definitions
- the present invention relates to a method and apparatus for manufacturing a fiber reinforced resin molding material.
- This application claims priority based on Japanese Patent Application No. 2015-136084 filed in Japan on July 7, 2015 and Japanese Patent Application No. 2016-078937 filed in Japan on April 11, 2016. The contents are incorporated herein.
- SMC Sheet Molding Compound
- stampable sheets are known as molding materials that are excellent in mechanical properties of molded products and suitable for molding complex shapes such as three-dimensional shapes.
- SMC is a sheet-like fiber-reinforced resin molding material in which a thermosetting resin such as an unsaturated polyester resin is impregnated between filaments of a fiber bundle obtained by cutting reinforcing fibers such as glass fibers and carbon fibers.
- the stampable sheet is a sheet-like fiber reinforced resin molding material in which, for example, the above-described cut fiber bundle is impregnated with a thermoplastic resin.
- SMC is an intermediate material for obtaining molded products.
- compression (press) molding is performed while heating the SMC using a mold.
- the fiber bundle and the thermosetting resin are filled in the cavity of the mold while integrally flowing, and then the thermosetting resin is cured. Therefore, by using this SMC, it is possible to obtain molded products of various shapes such as those partially differing in thickness and those having ribs or bosses.
- a stampable sheet molded article can be obtained by once heating to a temperature equal to or higher than the melting point of the thermoplastic resin with an infrared heater or the like, and cooling and pressurizing with a mold having a predetermined temperature.
- a fiber bundle having a large number of filaments called a large tow which is relatively inexpensive, is used, and the fiber bundle is widened in the width direction (referred to as opening) and then opened.
- the fiber bundle is divided into a plurality of fiber bundles (referred to as splitting), and the split fiber bundle is cut with a cutting machine.
- Patent Document 1 discloses a method of separating fibers by piercing a protruding fiber into a fiber bundle that has been opened.
- this method when this method is used, if the filaments in the fiber bundle are skewed or meandered, the fiber bundle that should have been separated remains in the fiber bundle after being cut without being partially separated. The bundle may not be split.
- Patent Document 2 discloses a method for continuously separating an opened fiber bundle using a rotating rotary blade.
- this method if the meandering of the fiber bundle and the slanting or meandering of the filaments in the fiber bundle occur, a part of the split fiber bundle is cut, and the cut fiber bundle becomes a roll or the like. There is a risk of wrapping around.
- the present invention has been proposed in view of such a conventional situation, and in producing a sheet-like fiber reinforced resin molding material in which a resin is impregnated between filaments of a cut fiber bundle, While maintaining the quality of the molding material, while avoiding the effects of meandering of the fiber bundles and the skew and meandering of the filaments generated in the fiber bundle, the divided fiber bundles are supplied to the cutter in a stable state. It is an object of the present invention to provide a manufacturing method and a manufacturing apparatus for a fiber-reinforced resin molding material that can be made possible.
- the present invention provides the following means.
- a plurality of continuous blades arranged at a predetermined interval in the width direction of the continuous fiber bundles are intermittently pierced into the continuous fiber bundles, and the space between each of the divided fiber bundles is between
- a plurality of continuous blades arranged at predetermined intervals in the width direction of the continuous fiber bundles are arranged in the circumferential direction.
- the saw is arranged using the saw blade in which the plurality of blades are arranged in the same direction as the transport direction of the fiber bundle.
- the continuous fiber bundle is split into a plurality of fiber bundles in a state of being overlapped in the thickness direction.
- the opened fiber bundle is divided into a plurality of fiber bundles.
- a fiber-reinforced resin molding material manufacturing apparatus for manufacturing a sheet-like fiber-reinforced resin molding material in which a resin is impregnated between filaments of a cut fiber bundle, A splitting part for splitting a continuous fiber bundle into a plurality of fiber bundles, and a cutting part for cutting the split fiber bundle with a cutting machine
- the fiber separation resin molding material is a fiber reinforced resin molding material in which a portion of a plurality of fiber bundles that have been separated is partially unseparated by intermittently piercing a blade into the continuous fiber bundle. Manufacturing equipment.
- the separation unit includes a rotary blade in which a plurality of blades are arranged in the circumferential direction, and intermittently put the plurality of blades on the continuous fiber bundle while rotating the rotary blade.
- the separating fiber includes a saw blade in which a plurality of blades are arranged side by side in the same direction as the transport direction of the fiber bundle, and the continuous fiber is swung in the vertical direction.
- the apparatus for producing a fiber-reinforced resin molding material according to any one of claims [12] to [16], wherein the blade is pierced from a side opposite to the side on which it is disposed. [18] A spacer member disposed between each of the plurality of blades arranged in the width direction, and the plurality of blades are pierced to a position where the spacer member is in contact with the continuous fiber bundle. [13] The apparatus for producing a fiber-reinforced resin molding material according to any one of to [17].
- the fiber bundles are maintained in the fiber bundle while maintaining the quality of the fiber reinforced resin molding material by partially leaving each of the plurality of fiber bundles that have been split into unsplit states. It is possible to supply the split fiber bundle to the cutting machine in a stable state while avoiding the influence of the skew and meandering of the generated filament.
- the method for producing a fiber reinforced resin molding material of the present invention is a method for producing a sheet-like fiber reinforced resin molding material in which a resin is impregnated between filaments of a cut fiber bundle, and is applied to the production of SMC, stampable sheet, and the like. It can be done.
- the fiber bundle is a bundle of a plurality of reinforcing fibers.
- the reinforcing fiber carbon fiber is preferable.
- the reinforcing fibers are not limited to carbon fibers, and reinforcing fibers other than carbon fibers such as glass fibers may be used.
- thermosetting resin or a thermoplastic resin can be used.
- the resin only a thermosetting resin may be used, only a thermoplastic resin may be used, or both a thermosetting resin and a thermoplastic resin may be used.
- the resin is preferably a thermosetting resin.
- a thermoplastic resin is preferable as the resin.
- thermosetting resin examples include unsaturated polyester resin, epoxy resin, vinyl ester resin, phenol resin, epoxy acrylate resin, urethane acrylate resin, phenoxy resin, alkyd resin, urethane resin, maleimide resin, cyanate resin, and the like.
- 1 type may be used independently and 2 or more types may be used together.
- thermoplastic resin examples include polyolefin resins, polyamide resins, polyester resins, polyphenylene sulfide resins, polyether ketone resins, polyether sulfone resins, and aromatic polyamide resins.
- 1 type may be used independently and 2 or more types may be used together.
- a continuous fiber bundle is intermittently divided in the longitudinal direction so as to satisfy the condition of the following formula (1), and the interval in the longitudinal direction is set.
- the cut fiber bundle is obtained by cutting after emptying. 1 ⁇ a / L (1)
- a is the length of the division part in the said continuous fiber bundle
- L is the space
- a / L is preferably 1.05 or more, and more preferably 1.1 or more.
- a / L is 10 or less, even if the filaments in the fiber bundle to be separated are skewed or meandering, generation of fluff in the cut fiber bundle and the process by this fluff It tends to reduce trouble.
- a / L is preferably 8 or less, and more preferably 5 or less.
- a continuous fiber bundle is intermittently split in the longitudinal direction so as to satisfy the condition of the following formula (3), and the longitudinal direction is The above-mentioned cut fiber bundle is obtained by cutting at intervals. 0.9 ⁇ a / (a + b) ⁇ 1 (3)
- a is the length of the splitting part in the said continuous fiber bundle
- b is the unsplit part which exists between the intermittent splitting parts in the said continuous fiber bundle Is the length of
- a / (a + b) When the value of a / (a + b) is less than 0.9, for example, when the fiber bundle is spread on the paste at the time of SMC production, the undivided portion of the cut fiber bundle is difficult to be divided. While it becomes difficult to uniformly disperse the fiber on the paste, the impregnation property of the resin into the reinforcing fiber is lowered, and the quality of the manufactured SMC tends to be lowered.
- the value of a / (a + b) is preferably 0.92 or more.
- the fiber bundle In the method for producing a fiber-reinforced resin molding material of the present invention, it is preferable to divide and cut the fiber bundle so as to satisfy the conditions of the formula (1) and the formula (3) at the same time. Thereby, when the fiber bundle is cut, it is cut in a state where at least a part thereof is split. Thereby, it is easy to avoid that the fiber bundle which has not been split into the fiber bundle after cutting remains. In addition, even if the fiber bundle remains undivided in part, since most of the cut fiber bundle is separated, they are manufactured when they are spread, so that they are divided. There is no particular impact on the quality of the SMC.
- a form in which a continuous bundle of fibers is intermittently pierced with a blade in the longitudinal direction is preferable from the viewpoint that the fiber bundle can be divided more stably.
- a plurality of continuous blades arranged at a predetermined interval in the width direction of the continuous fiber bundles are intermittently pierced into the continuous fiber bundles, so that each of the divided fiber bundles is partially undivided. More preferably, it is in a fine state.
- the blade is an article having a plate-like shape, the tip part first contacting the fiber bundle being thin and thin, and the tip part being substantially wedge-shaped.
- the blade material include hard materials such as metal and ceramic.
- the shape of the blade is not particularly limited as long as it can pierce the fiber bundle.
- the maximum thickness of the portion in contact with the fiber bundle of the blade is preferably 0.3 to 2 mm.
- the maximum width of the portion of the blade that contacts the fiber bundle is preferably 0.5 to 1.5 mm.
- the angle of the tip in the width direction of the blade is preferably 30 ° to 90 °.
- the blade angle (blade edge angle) in the thickness direction of the blade is preferably 10 ° to 45 °, more preferably 20 ° to 30 °.
- the angle of a cutting point means the front-end
- the blade edge angle means the tip angle of the blade when the side surface portion (surface in the thickness direction) of the blade is viewed from the front.
- the form in which the continuous fiber bundle is intermittently split may be a means other than the blade, for example, a form in which a gas such as air is blown onto the above-described fiber bundle under predetermined conditions.
- Coating step A paste containing a resin is coated on the first sheet conveyed in a predetermined direction.
- Splitting step A continuous fiber bundle is split into a plurality of fiber bundles.
- Cutting step The divided fiber bundle is cut with a cutting machine and sprayed on the paste.
- Impregnation step after the second sheet coated with the paste is superposed on the first sheet on which the fiber bundles are dispersed, between the first sheet and the second sheet By pressing the sandwiched paste and the fiber bundle, a resin is impregnated between the filaments of the fiber bundle.
- Filaments generated in the fiber bundle by separating and cutting the fiber bundle so as to satisfy one or both of the conditions (1) and (3) as described above in the fiber separation step and the cutting step.
- the fiber bundle that has been separated can be supplied to a cutter in a stable state and cut while avoiding the effects of skew and meandering.
- the splitting step while rotating the rotary blade using a plurality of rotary blades arranged in a circumferential direction, a plurality of blades arranged in a row in the width direction of the continuous fiber bundle, A form in which a plurality of blades are pierced intermittently into a continuous fiber bundle is preferable. Further, using a saw blade in which a plurality of blades are arranged in the same direction as the conveying direction of the fiber bundle, while swinging the saw blade up and down, A form in which the blade is pierced intermittently is also preferable.
- the splitting step it is preferable to split into a plurality of fiber bundles in a state where continuous fiber bundles are overlapped in the thickness direction. Moreover, it is preferable that after the continuous fiber bundle is opened in the width direction, the opened fiber bundle is divided into a plurality of fiber bundles in the splitting step. That is, it is preferable to further include an opening step for opening a continuous fiber bundle in the width direction before the separating step.
- the SMC manufacturing apparatus of the present embodiment includes a fiber bundle made of carbon (carbon) fibers and a thermosetting resin made of an unsaturated polyester resin, and impregnated the thermosetting resin between the filaments of the cut fiber bundle.
- This is an apparatus for producing a sheet-like SMC (Sheet Molding Compound).
- reinforcing fibers such as glass fibers can be used as the fiber bundle.
- a thermoplastic resin can be used as the resin.
- FIG. 1 is a side view showing the configuration of the SMC manufacturing apparatus.
- FIG. 2A is a side view showing a configuration example of the fiber bundle supply unit 10 included in the SMC manufacturing apparatus shown in FIG. 1
- FIG. 2B is a front view of the fiber separation unit viewed from the conveyance direction.
- an XYZ orthogonal coordinate system is set, and the positional relationship of each member will be described with reference to this XYZ orthogonal coordinate system.
- the SMC manufacturing apparatus of this embodiment includes a fiber bundle supply unit 10, a first sheet supply unit 11, a first coating unit 12, a cutting unit 13, and a second sheet.
- a supply unit 14, a second coating unit 15, and an impregnation unit 16 are provided.
- the fiber bundle supply unit 10 opens the fiber bundle CF in the width direction (Y-axis direction) while conveying the continuous fiber bundle CF in a predetermined direction (hereinafter referred to as a conveyance direction) as shown in an enlarged view in FIG. 2A.
- a spread part and a split part that splits the spread fiber bundle CF into a plurality of fiber bundles CF are configured.
- the fiber bundle supply unit 10 includes a plurality of spread bars 17, a plurality of rotary blades 18, and a plurality of godet rollers 19.
- the large tow fiber bundle CF drawn from the bobbin B is opened in the width direction in the + X-axis direction (right side in the horizontal direction) in FIG.
- the fiber bundle CF is widened in the width direction by means of heating, rubbing, swinging or the like in each spread bar 17 while the fiber bundle CF passes through the plurality of spread bars 17 that are the spread parts. Is done.
- the opened fiber bundle CF is split into a plurality of fiber bundles CF by the plurality of rotary blades 18 that are the splitting portions.
- the plurality of rotary blades 18 are arranged side by side at a predetermined interval in the width direction (Y-axis direction) of the opened fiber bundle CF.
- Each rotary blade 18 has a plurality of blades 18a arranged side by side in the circumferential direction. Between the rotary blades 18, it is preferable to match the positions of the plurality of blades 18 a in the circumferential direction. Thereby, it is possible to easily pierce the blades 18a of the plurality of rotary blades 18 arranged in the width direction with respect to the fiber bundle CF.
- spacer members 18b are arranged between the rotary blades 18.
- the outer peripheral surface of the spacer member 18b is located slightly above or slightly below the boundary (blade base) of each blade 18a.
- the penetration depth is adjusted according to this positional relationship.
- the plurality of rotary blades 18 are rotatably supported. Thereby, a plurality of rotary blades 18 can be rotated in the same direction as the conveyance direction of the fiber bundle CF while the blade 18a is pierced into the fiber bundle CF along with the conveyance of the fiber bundle CF.
- it is good also as a structure driven by a drive motor etc., synchronizing with conveyance of the fiber bundle CF.
- a pair of guide members 40 are disposed on both sides of the conveyance direction across the plurality of rotary blades 18.
- the plurality of rotary blades 18 are disposed so as to pierce the plurality of blades 18a from the side opposite to the side on which the pair of guide members 40 are disposed with respect to the fiber bundle CF conveyed between the pair of guide members 40. ing.
- the fiber bundle CF is split in the width direction by intermittently piercing the continuous fiber bundle CF with a plurality of blades 18a while rotating the rotary blade 18. At this time, the plurality of blades 18a are pierced to a position where the spacer member 18b is in contact with the continuous fiber bundle CF, thereby preventing the fiber bundle CF from being continuously separated between the blades 18a. Thereby, between each of the divided fiber bundles CF is not completely separated, but is partially undivided. Thereafter, the split fiber bundle CF is supplied toward the cutting unit 13 while being guided by a plurality of godet rollers 19.
- the first sheet supply unit 11 supplies the continuous first sheet S1 unwound from the first raw fabric roll R1 toward the first coating unit 12.
- the SMC manufacturing apparatus includes a first conveyance unit 20 that conveys the first sheet S1 toward the impregnation unit 16.
- the 1st conveyance part 20 is provided with the conveyor 23 which multiplied the endless belt 22 between a pair of pulleys 21a and 21b.
- the conveyor 23 rotates the endless belt 22 by rotating the pair of pulleys 21a and 21b in the same direction, and the first sheet S1 is placed on the surface of the endless belt 22 in the + X axis direction (horizontal) in FIG. Transport toward the right side of the direction).
- the first coating unit 12 includes a coater 24 that supplies the paste P and is positioned directly above the first sheet S1 that is conveyed in the + X-axis direction (right side in the horizontal direction) in FIG. ing.
- the first sheet S ⁇ b> 1 passes through the coater 24, whereby the paste P is applied with a predetermined thickness on the surface of the first sheet S ⁇ b> 1.
- the paste P includes a filler such as calcium carbonate, a low shrinkage agent, a release agent, a curing initiator, a thickener, and the like. A mixture can be used.
- the cutting unit 13 is located downstream of the first coating unit 12 in the conveying direction, and the fiber bundle CF supplied from the fiber bundle supply unit 10 is cut by the cutting machine 13A and spread on the paste P.
- the cutting machine 13A is located above the first sheet S1 conveyed by the conveyor 23, and includes a guide roller 25, a pinch roller 26, and a cutter roller 27.
- the guide roller 25 guides the fiber bundle CF supplied from the fiber bundle supply unit 10 downward while rotating.
- the pinch roller 26 pulls the divided fiber bundle CF in cooperation with the guide roller 25 by rotating in the opposite direction to the guide roller 25 while sandwiching the fiber bundle CF with the guide roller 25.
- the cutter roller 27 cuts the fiber bundle CF so as to have a predetermined length while rotating. The cut fiber bundle CF falls from between the guide roller 25 and the cutter roller 27 and is spread on the first sheet S1 (paste P).
- the second sheet supply unit 14 supplies the continuous second sheet S2 unwound from the second raw fabric roll R2 toward the second coating unit 15.
- the SMC manufacturing apparatus includes a second conveyance unit 28 that conveys the second sheet S2 toward the impregnation unit 16.
- the second transport unit 28 has a plurality of guide rollers 29 located above the first sheet S ⁇ b> 1 transported by the conveyor 23.
- the second transport unit 28 transports the second sheet S2 supplied from the second sheet supply unit 14 in the ⁇ X axis direction (left side in the horizontal direction) in FIG.
- the direction in which the second sheet S2 is conveyed by the guide roller 29 is reversed from below toward the + X-axis direction (right side in the horizontal direction) in FIG.
- the second coating unit 15 includes a coater 30 that supplies the paste P and is positioned immediately above the second sheet S2 that is conveyed toward the ⁇ X axis direction (left side in the horizontal direction) in FIG. ing.
- the second sheet S ⁇ b> 2 passes through the coater 30, so that the paste P is coated on the surface of the second sheet S ⁇ b> 2 with a predetermined thickness.
- the impregnation unit 16 is located downstream of the cutting unit 13 in the transport direction, and includes a bonding mechanism 31 and a pressure mechanism 32.
- the bonding mechanism 31 is located above the pulley 21 b on the downstream side of the conveyor 23 and includes a plurality of bonding rollers 33.
- the plurality of bonding rollers 33 are arranged in contact with the back surface of the second sheet S2 coated with the paste P. Moreover, the some bonding roller 33 is arrange
- the second sheet S2 is overlaid on the first sheet S1. Further, the first sheet S1 and the second sheet S2 are conveyed to the pressurizing mechanism 32 side while being bonded to each other while sandwiching the fiber bundle CF and the paste P therebetween.
- the 1st sheet S1 and the 2nd sheet S2 which were pasted together are called pasting sheet S3.
- the pressurizing mechanism 32 is located downstream of the first transport unit 20 (conveyor 23), and includes a lower conveyor 36A in which an endless belt 35a is hung between a pair of pulleys 34a and 34b, and a pair of pulleys 34c. , 34d and an upper conveyor 36B in which an endless belt 35b is multiplied.
- the lower conveyor 36A and the upper conveyor 36B are arranged to face each other in a state where the endless belts 35a and 35b are abutted with each other.
- the pressurizing mechanism 32 rotates the endless belt 35a by rotating the pair of pulleys 34a and 34b of the lower conveyor 36A in the same direction, and rotates the pair of pulleys 34c and 34d of the upper conveyor 36B in the same direction.
- the endless belt 35b is rotated in the reverse direction at the same speed as the endless belt 35a. Thereby, bonding sheet
- the pressing mechanism 32 includes a plurality of lower rollers 37a and a plurality of upper rollers 37b.
- the plurality of lower rollers 37a are arranged in contact with the back surface of the butted portion of the endless belt 35a.
- the plurality of upper rollers 37b are arranged in contact with the back surface of the butted portion of the endless belt 35b.
- the plurality of lower rollers 37a and the plurality of upper rollers 37b are alternately arranged along the conveyance direction of the bonding sheet S3.
- the pressurizing mechanism 32 includes a plurality of pastes P and fiber bundles CF sandwiched between the first sheet S1 and the second sheet S2 while the bonding sheet S3 passes between the endless belts 35a and 35b. Pressure is applied by the lower roller 37a and the plurality of upper rollers 37b. At this time, the paste P is impregnated into the filament of the fiber bundle CF from both sides of the fiber bundle CF. Thus, an SMC raw fabric R in which the filaments of the fiber bundle CF are impregnated with the thermosetting resin is obtained.
- the first first roll S1 is unwound from the first raw roll R1 and is transported by the first transport unit 20, while the first coating is being performed.
- the processing unit 12 applies the paste P to the first sheet S1 with a predetermined thickness.
- the opening step the fiber bundle CF is passed between the plurality of opening bars 17, and the fiber bundle CF is widened in the width direction.
- the fiber separation step a plurality of blades 18a are intermittently inserted into the opened fiber bundle CF while rotating the rotary blade 18.
- the fiber bundle CF is intermittently divided in the longitudinal direction, and a portion between the divided fiber bundles CF is partially undivided.
- the temperature of the fiber bundle CF at the time of splitting is preferably 60 ° C. or less, more preferably 50 to 5 ° C., in order to prevent the split fiber bundles CF from being caught. .
- the split position of the split fiber bundle CF will be described with reference to FIG.
- the tow t of the opened fiber bundle CF is shown by a thin line
- the dividing line of the opened fiber bundle CF is shown by a thick line
- the opened fiber bundle CF is cut by a cutting machine 13A.
- the cutting line is indicated by a broken line.
- the splitting portions divided by the blade 18a and the undivided portions not split by the blade 18a are alternately formed in a so-called perforated shape. Has been.
- the meandering of the fiber bundle CF and the fiber bundle CF are performed by partially leaving the fiber bundles CF that have been separated into a partially undivided state. It is possible to supply the split fiber bundle CF to the cutting machine 13A in a stable state while avoiding the effects of skew, meandering and entanglement in the filament. In addition, the production cost of SMC can be reduced by using a relatively inexpensive large tow fiber bundle CF.
- the fiber bundle CF separated in the cutting unit 13 is cut by the cutting machine 13A and spread on the paste P.
- the fiber bundle is split and split so as to satisfy either one or both of the above-described condition (1) and condition (3). Thereby, it becomes easy to disperse the reinforcing fibers uniformly, and the impregnation property of the resin is improved, so that high quality SMC can be obtained.
- the second sheet supply unit 14 unwinds the long second sheet S2 from the second raw roll R2, and the second coating unit 15 pastes the second sheet S2 onto the second sheet S2. P is applied with a predetermined thickness.
- the second sheet S ⁇ b> 2 is overlaid on the first sheet S ⁇ b> 1 by the bonding mechanism 31.
- the pressure mechanism 32 pressurizes the paste P and the fiber bundle sandwiched between the first sheet S1 and the second sheet S2, and impregnates the thermosetting resin between the filaments of the fiber bundle.
- an SMC raw fabric R in which the filaments of the fiber bundle CF are impregnated with the thermosetting resin is obtained.
- the SMC raw fabric R is wound into a roll and then sent to the next process. And the original fabric R of SMC is cut
- the first sheet S1 and the second sheet S2 are peeled off from the SMC before forming the SMC.
- this invention is not necessarily limited to the thing of the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
- a plurality of saw blades 38 as shown in FIGS. 4A and 4B may be used.
- 4A is a side view showing another configuration example of the fiber bundle supply unit included in the SMC manufacturing apparatus shown in FIG. 1, and
- FIG. 4B is a front view of the fiber separation unit as seen from the carrying direction.
- the plurality of saw blades 38 are arranged side by side at a predetermined interval in the width direction (Y-axis direction) of the opened fiber bundle CF.
- Each saw blade 38 has a plurality of blades 38a arranged side by side in the same direction as the conveying direction of the fiber bundle CF. Furthermore, it is preferable that the positions in the conveying direction of the plurality of blades 38a are made to coincide with each other between the saw blades 38. Accordingly, it is possible to easily pierce each blade 38a of the plurality of saw blades 38 arranged in the width direction with respect to the fiber bundle CF.
- a spacer member 38b is disposed between the saw blades 38.
- the upper surface of the spacer member 38b is located slightly above the boundary (blade base) of each blade 38a.
- a pair of guide members 40 are disposed on both sides of the conveying direction across the plurality of saw blades 38.
- the plurality of saw blades 38 pierce the plurality of blades 38a from the side opposite to the side on which the pair of guide members 40 are disposed with respect to the fiber bundle CF conveyed between the pair of guide members 40, and fibers. It is arranged so as to be able to reciprocate up and down (oscillate) up and down from a position away from the bundle CF.
- the plurality of blades 38a are pierced intermittently into the opened fiber bundle CF while swinging the saw blade 38 in the vertical direction (Z-axis direction).
- the fiber bundle CF is separated in the width direction.
- the plurality of blades 38a are pierced to a position where the spacer member 38b is in contact with the continuous fiber bundle CF, thereby preventing the fiber bundle CF from being continuously divided between the blades 38a.
- the fiber bundle CF is supplied to the cutting machine 13A in a stable state while avoiding the influence of the meandering of the fiber bundle CF and the skew, meandering and entanglement in the filament generated in the fiber bundle CF. Is possible.
- the production cost of SMC can be reduced by using a relatively inexpensive large tow fiber bundle CF.
- the split fiber bundles CF are split into a plurality of fiber bundles CF in a state where the continuous fiber bundles CF are overlapped in the thickness direction. It is also possible to do.
- the blades 18a and 38a may have any shape that allows the blades 18a and 38a to be intermittently inserted into the continuous fiber bundle CF.
- the shape of 38a can be illustrated.
- the blades 18a and 38a may be single-edged or double-edged.
- the blades 18a and 38a when the blade edge angle (cutting edge angle) shown in FIG. 6A is ⁇ and the blade angle (blade edge angle) shown in FIG. 6B is ⁇ , 30 ° ⁇ ⁇ ⁇ 90 °, 10 It is preferable to satisfy the following condition: ° ⁇ ⁇ ⁇ 45 ° (more preferably 20 ° ⁇ ⁇ ⁇ 30 °).
- the thickness of the blades 18a, 38a is preferably 0.3-2 mm.
- the apparatus for producing a fiber-reinforced resin molding material of the present invention may not be provided with an opening portion.
- Example 1 SMC was manufactured using the SMC manufacturing apparatus shown in FIG. 1 and FIG. A part provided with four rotary blades 18 was used for the separation part.
- each rotary blade 18 a blade in which six blades 18a are arranged side by side in the circumferential direction is used.
- Each blade 18a has a maximum thickness of 1 mm at the portion in contact with the fiber bundle CF, a maximum width of 1 mm at the portion in contact with the fiber bundle of the blade, and an angle of the tip in the width direction of the blade (cutting edge angle) of 64 °.
- the blade has a substantially triangular shape with a blade angle (blade edge angle) in the thickness direction of 30 °.
- a spacer member 18b is disposed between the rotary blades 18, and the width of the spacer member 18b is 2.2 mm.
- the fiber bundle CF As the fiber bundle CF, a carbon fiber bundle (manufactured by Mitsubishi Rayon Co., Ltd., product name: TR50S15L, number of fibers: 15000) was used. As the paste P, a vinyl ester resin was used. In the opening bar 17, the fiber bundle CF was widened to a width of 15 mm. The conveyance speed of the fiber bundle CF at the time of fiber separation was 40 m / min. By splitting with four rotary blades 18, a split fiber portion having a length of 28.3 mm and an unsplit portion having a length of 0.5 mm are provided in the longitudinal direction of the fiber bundle CF. Four rows were formed alternately at 3 mm intervals in the width direction of the fiber bundle CF.
- the cutting by the cutting machine 13A was performed at intervals of 25.4 mm in the longitudinal direction of the split fiber bundle CF.
- the cut fiber bundle CF was sprayed on the paste P coated on the first sheet S1.
- a / L was 1.11 and a / (a + b) was 0.98.
- the fiber bundle CF after the splitting was stably supplied to the cutting part 13 without being partially wound around a roll or the like. Some of the cut fiber bundles CF had an undivided portion, but the level did not affect the dispersibility of the fiber bundle CF on the paste P.
- the quality of the manufactured SMC was almost the same as SMC using a chopped carbon fiber bundle of the same size obtained using a carbon fiber bundle CF (number of fibers: 3000) with a small number of fibers and without a fiber separation step. .
- Example 2 SMC was manufactured using the SMC manufacturing apparatus shown in FIG.1 and FIG.2. As the separating part, one provided with one rotary blade 18 was used. Each of the blades 18a has a maximum thickness of 0.5 mm at a portion in contact with the fiber bundle CF, a maximum width of a portion in contact with the fiber bundle of the blade is 0.5 mm, and an angle of a tip in the width direction of the blade (angle of the cutting edge). ) was 64 °, and the blade angle in the thickness direction of the blade (blade edge angle) was 30 °, which was a substantially triangular shape. Between each rotary blade 18, the position in the circumferential direction of the some cutter 18a was mutually corresponded.
- a spacer member 18b is disposed between the rotary blades 18, and the width of the spacer member 18b is 24.5 mm.
- the fiber bundle CF a carbon fiber bundle (manufactured by Mitsubishi Rayon Co., Ltd., product name: TRW40 50L, number of fibers: 50000) was used.
- the paste P a vinyl ester resin was used.
- the opening bar 17 the fiber bundle CF was widened to a width of 25 mm.
- the conveyance speed of the fiber bundle CF at the time of fiber separation was 40 m / min.
- a split part having a length of 28.3 mm and a non-split part having a length of 0.6 mm were formed in the fiber bundle CF after opening.
- the cutting by the cutting machine 13A was performed at intervals of 25.4 mm in the longitudinal direction of the split fiber bundle CF.
- the cut fiber bundle CF was sprayed on the paste P coated on the first sheet S1.
- a / L was 1.11 and a / (a + b) was 0.98.
- the fiber bundle CF after the splitting was stably supplied to the cutting part 13 without being partially wound around a roll or the like. Some of the cut fiber bundles CF had an undivided portion, but the level did not affect the dispersibility of the fiber bundle CF on the paste P.
- the quality of the manufactured SMC was almost the same as SMC using a chopped carbon fiber bundle of the same size obtained using a carbon fiber bundle CF (number of fibers: 3000) with a small number of fibers and without a fiber separation step. .
- Example 1 Using the same apparatus as in Example 1, a carbon fiber bundle (manufactured by Mitsubishi Rayon Co., Ltd., product name: TR50S15L, number of fibers: 15000) was used. In the opening bar 17, the fiber bundle CF was widened to a width of 15 mm. The conveyance speed of the fiber bundle CF at the time of fiber separation was 40 m / min. By splitting with the four rotary blades 18, the split fiber portion having a length of 20.4 mm and the unsplit portion having a length of 1 mm are alternately arranged in the longitudinal direction of the fiber bundle CF. Four rows were formed continuously and at intervals of 3 mm in the width direction of the fiber bundle CF.
- the cutting by the cutting machine 13A was performed at intervals of 25.4 mm in the longitudinal direction of the split fiber bundle CF.
- the cut fiber bundle CF was sprayed on the paste P coated on the first sheet S1.
- a / L was 0.8 and a / (a + b) was 0.95.
- the fiber bundle CF after the splitting was stably supplied to the cutting part 13 without being partially wound around a roll or the like.
- Some of the cut fiber bundles CF had an undivided portion, but the level did not affect the dispersibility of the fiber bundle CF on the paste P.
- the quality of the manufactured SMC is lower than that of SMC using a chopped carbon fiber bundle of the same size obtained using a carbon fiber bundle CF (number of fibers: 3000) with a small number of fibers and without a separation step. The result was that the fiber bundle was not divided and the strength was reduced by 30%.
- Example 2 Using the same apparatus as in Example 1, a carbon fiber bundle (manufactured by Mitsubishi Rayon Co., Ltd., product name: TR50S15L, number of fibers: 15000) was used. In the opening bar 17, the fiber bundle CF was widened to a width of 15 mm. The conveyance speed of the fiber bundle CF at the time of fiber separation was 40 m / min. By splitting with four rotary blades 18, a split fiber portion having a length of 28.3 mm and an unsplit portion having a length of 3.5 mm are arranged in the longitudinal direction of the fiber bundle CF. Four rows were formed alternately at 3 mm intervals in the width direction of the fiber bundle CF.
- the cutting by the cutting machine 13A was performed at intervals of 25.4 mm in the longitudinal direction of the split fiber bundle CF.
- the cut fiber bundle CF was sprayed on the paste P coated on the first sheet S1.
- a / L was 1.11
- a / (a + b) was 0.89.
- the fiber bundle CF after the splitting was stably supplied to the cutting part 13 without being partially wound around a roll or the like.
- Some of the cut fiber bundles CF had an undivided portion, but the level did not affect the dispersibility of the fiber bundle CF on the paste P.
- the quality of the manufactured SMC is lower than that of SMC using a chopped carbon fiber bundle of the same size obtained using a carbon fiber bundle CF (number of fibers: 3000) with a small number of fibers and without a separation step. The result was that the fiber bundle was not divided and the strength was reduced by 30%.
- Example 3 Using the same apparatus as in Example 1, a carbon fiber bundle (manufactured by Mitsubishi Rayon Co., Ltd., product name: TR50S15L, number of fibers: 15000) was used. In the opening bar 17, the fiber bundle CF was widened to a width of 15 mm. The conveyance speed of the fiber bundle CF at the time of fiber separation was 40 m / min. By splitting with four rotary blades 18, a split fiber portion having a length of 28.3 mm and an unsplit portion having a length of 0 mm are alternately arranged in the longitudinal direction of the fiber bundle CF. Four rows were formed continuously and at intervals of 3 mm in the width direction of the fiber bundle CF.
- the cutting by the cutting machine 13A was performed at intervals of 25.4 mm in the longitudinal direction of the split fiber bundle CF.
- the cut fiber bundle CF was sprayed on the paste P coated on the first sheet S1.
- a / L was 1.11
- a / (a + b) was 1.
- a part of the fiber bundle CF after splitting was wound around a roll or the like and could not be produced.
- SYMBOLS 10 Fiber bundle supply part 11 ... 1st sheet supply part 12 ... 1st coating part 13 ... Cutting part 13A ... Cutting machine 14 ... 2nd sheet supply part 15 ... 2nd coating part 16 ... Impregnation part 18 ... Rotary blade 18a ... Cutlery 18b ... Spacer member 20 ... First transport unit 28 ... Second transport unit 31 ... Pasting mechanism 32 ... Pressure mechanism 38 ... Saw blade 38a ... Cutlery 38b ... Spacer member 40 ... Guide member CF ... fiber bundle P ... paste (thermosetting resin) S1 ... first sheet S2 ... second sheet S3 ... bonding sheet R ... raw fabric of SMC (fiber reinforced resin molding material)
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Abstract
Description
本願は、2015年7月7日に日本に出願された特願2015-136084号、及び2016年4月11日に日本に出願された特願2016-078937号に基づき優先権を主張し、その内容をここに援用する。
〔1〕 裁断した繊維束のフィラメント間に樹脂を含浸させたシート状の繊維強化樹脂成形材料の製造方法であって、
下式(1)の条件を満たすように、連続する繊維束を長手方向において断続的に分繊し、長手方向に間隔を空けて裁断して前記の裁断した繊維束を得る、繊維強化樹脂成形材料の製造方法。
1≦a/L ・・・(1)
(ただし、前記式(1)中、aは前記の連続する繊維束における分繊部分の長さであり、Lは前記繊維束の長手方向における裁断される間隔である。)
〔2〕 さらに、下式(2)の条件を満たすように前記分繊及び前記裁断を行う、〔1〕に記載の繊維強化樹脂成形材料の製造方法。
a/L≦10 ・・・(2)
〔3〕 裁断した繊維束のフィラメント間に樹脂を含浸させたシート状の繊維強化樹脂成形材料の製造方法であって、
下式(3)の条件を満たすように、連続する繊維束を長手方向において断続的に分繊し、長手方向に間隔を空けて裁断して前記の裁断した繊維束を得る、繊維強化樹脂成形材料の製造方法。
0.9≦a/(a+b)<1 ・・・(3)
(ただし、前記式(3)中、aは前記の連続する繊維束における分繊部分の長さであり、bは前記の連続する繊維束における断続的な分繊部分間に存在する未分繊部分の長さである。)
〔4〕 前記樹脂が熱硬化性樹脂である、〔1〕~〔3〕のいずれかに記載の繊維強化樹脂成形材料の製造方法。
〔5〕 前記の断続的な分繊を、前記の連続する繊維束に刃物を間欠的に突き刺すことによって行う、〔1〕~〔4〕のいずれかに記載の繊維強化樹脂成形材料の製造方法。
〔6〕 前記の連続する繊維束の幅方向に所定の間隔で並ぶ連なった複数の刃物を、前記の連続する繊維束に間欠的に突き刺して、分繊された複数の繊維束の各間を部分的に未分繊の状態とする、〔1〕~〔5〕のいずれかに記載の繊維強化樹脂成形材料の製造方法。
〔7〕 所定の方向に搬送される第1のシートの上に樹脂を含むペーストを塗工するステップと、
連続する繊維束を複数の繊維束に分繊するステップと、
前記分繊された繊維束を裁断機で裁断して、前記ペーストの上に散布するステップと、
前記繊維束が散布された第1のシートの上に、前記ペーストが塗工された第2のシートを重ね合わせた後、前記第1のシートと前記第2のシートとの間に挟み込まれた前記ペースト及び前記繊維束を加圧することによって、前記繊維束のフィラメント間に樹脂を含浸させるステップと、を含む、〔1〕~〔6〕のいずれかに記載の繊維強化樹脂成形材料の製造方法。
〔8〕 前記の連続する繊維束を複数の繊維束に分繊するステップにおいて、連続する繊維束の幅方向に所定の間隔で並ぶ、連なった複数の刃物が周方向に並んで配置された複数の回転刃を用いて、前記回転刃を回転させながら、前記の連続する繊維束に前記の複数の刃物を間欠的に突き刺す、〔7〕に記載の繊維強化樹脂成形材料の製造方法。
〔9〕 前記の連続する繊維束を複数の繊維束に分繊するステップにおいて、前記の複数の刃物が前記繊維束の搬送方向と同一方向に並んで配置された鋸刃を用いて、前記鋸刃を上下方向に揺動させながら、前記の連続する繊維束に前記の複数の刃物を間欠的に突き刺す、〔7〕に記載の繊維強化樹脂成形材料の製造方法。
〔10〕 前記の連続する繊維束を複数の繊維束に分繊するステップにおいて、前記連続する繊維束を厚み方向に重ね合わせた状態で、複数の繊維束に分繊する、〔7〕~〔9〕のいずれかに記載の繊維強化樹脂成形材料の製造方法。
〔11〕 前記の連続する繊維束を幅方向に開繊した後に、前記の連続する繊維束を複数の繊維束に分繊するステップにおいて、開繊された繊維束を複数の繊維束に分繊する、〔7〕~〔10〕のいずれかに記載の繊維強化樹脂成形材料の製造方法。
〔12〕 裁断した繊維束のフィラメント間に樹脂を含浸させたシート状の繊維強化樹脂成形材料を製造する繊維強化樹脂成形材料の製造装置であって、
連続する繊維束を複数の繊維束に分繊する分繊部と、分繊された繊維束を裁断機で裁断する裁断部と、を含み、
前記分繊部は、前記の連続する繊維束に刃物を間欠的に突き刺すことによって、分繊された複数の繊維束の各間を部分的に未分繊の状態とする、繊維強化樹脂成形材料の製造装置。
〔13〕 前記刃物が、前記連続する繊維束の幅方向に所定の間隔で並ぶ連なった複数の刃物である、〔12〕に記載の繊維強化樹脂成形材料の製造装置。
〔14〕 所定の方向に搬送される第1のシートの上に樹脂を含むペーストを塗工する塗工部と、
前記分繊部と、
分繊された繊維束を裁断機で裁断して、前記ペーストの上に散布する裁断部と、
前記繊維束が散布された第1のシートの上に、前記ペーストが塗工された第2のシートを重ね合わせた後、前記第1のシートと前記第2のシートとの間に挟み込まれた前記ペースト及び前記繊維束を加圧することによって、前記繊維束のフィラメント間に樹脂を含浸させる含浸部とを含む、〔12〕又は〔13〕に記載の繊維強化樹脂成形材料の製造装置。
〔15〕 前記分繊部が、複数の刃物が周方向に並んで配置された回転刃を備え、前記回転刃を回転させながら、前記の連続する繊維束に前記の複数の刃物を間欠的に突き刺すものである、〔12〕~〔14〕のいずれかに記載の繊維強化樹脂成形材料の製造装置。
〔16〕 前記分繊部が、複数の刃物が前記繊維束の搬送方向と同一方向に並んで配置された鋸刃を備え、前記鋸刃を上下方向に揺動させながら、前記の連続する繊維束に前記の複数の刃物を間欠的に突き刺すものである、〔12〕~〔14〕のいずれかに記載の繊維強化樹脂成形材料の製造装置。
〔17〕 前記刃物を挟んだ搬送方向の両側に配置された一対のガイド部材を備え、前記一対のガイド部材の間で搬送される前記の連続する繊維束に対して、前記一対のガイド部材が配置された側とは反対側から前記刃物を突き刺す、請求項〔12〕~〔16〕のいずれかに記載の繊維強化樹脂成形材料の製造装置。
〔18〕 前記幅方向に並ぶ前記の複数の刃物の各間に配置されたスペーサ部材を備え、前記の連続する繊維束に前記スペーサ部材が接する位置まで前記の複数の刃物を突き刺す、〔13〕~〔17〕のいずれかに記載の繊維強化樹脂成形材料の製造装置。
なお、以下の説明において例示される材料、寸法等は一例であって、本発明はそれらに必ずしも限定されるものではなく、その要旨を変更しない範囲で適宜変更して実施することが可能である。
本発明の繊維強化樹脂成形材料の製造方法は、裁断した繊維束のフィラメント間に樹脂を含浸させたシート状の繊維強化樹脂成形材料の製造方法であり、SMCやスタンパブルシート等の製造に適用できるものである。
1≦a/L ・・・(1)
ただし、前記式(1)中、aは前記の連続する繊維束における分繊部分の長さであり、Lは前記繊維束の長手方向における裁断される間隔である。
a/L≦10 ・・・(2)
a/Lの値が10以下であれば、分繊する繊維束内のフィラメントに斜行や蛇行が存在する場合であっても、切断された繊維束への毛羽発生や、この毛羽による工程のトラブルを低減させやすい傾向にある。a/Lは、8以下が好ましく、5以下がより好ましい。
0.9≦a/(a+b)<1 ・・・(3)
ただし、前記式(3)中、aは前記の連続する繊維束における分繊部分の長さであり、bは前記の連続する繊維束における断続的な分繊部分間に存在する未分繊部分の長さである。
分繊した繊維束を安定した状態で裁断機まで供給するためには、a/(a+b)の値は、0.99以下が好ましく、0.98以下がより好ましい。
なお、切っ先の角度とは、刃物の平面部分を正面から見たときの刃物の先端角度を意味する。また、刃先角とは、刃物の側面部分(厚み方向の面)を正面から見たときの刃物の先端角度を意味する。
塗工ステップ:所定の方向に搬送される第1のシートの上に樹脂を含むペーストを塗工する。
分繊ステップ:連続する繊維束を複数の繊維束に分繊する。
裁断ステップ:前記分繊された繊維束を裁断機で裁断して、前記ペーストの上に散布する。
含浸ステップ:前記繊維束が散布された第1のシートの上に、前記ペーストが塗工された第2のシートを重ね合わせた後、前記第1のシートと前記第2のシートとの間に挟み込まれた前記ペースト及び前記繊維束を加圧することによって、前記繊維束のフィラメント間に樹脂を含浸させる。
また、連続する繊維束を幅方向に開繊した後に、分繊ステップにおいては開繊された繊維束を複数の繊維束に分繊することが好ましい。すなわち、分繊ステップの前に連続する繊維束を幅方向に開繊する開繊ステップをさらに有することが好ましい。
以下、本発明の一実施形態に係る繊維強化樹脂成形材料の製造装置として、例えば図1及び図2に示すSMC製造装置について具体的に説明する。本実施形態のSMC製造装置は、カーボン(炭素)繊維からなる繊維束と、不飽和ポリエステル樹脂からなる熱硬化性樹脂とを含み、裁断した繊維束のフィラメント間に熱硬化性樹脂を含浸させたシート状のSMC(Sheet Molding Compound)を製造する装置である。なお、繊維束としては、カーボン繊維の他にも、ガラス繊維等の強化繊維を用いることができる。樹脂としては、熱硬化性樹脂の他にも、熱可塑性樹脂を用いることができる。
繊維束供給部10では、先ず、図1中の+X軸方向(水平方向の右側)に向けてボビンBから引き出されたラージトウの繊維束CFが幅方向に開繊される。具体的には、繊維束CFが開繊部である複数の開繊バー17を通過する間に、各開繊バー17で加熱、擦過、揺動等の手段により繊維束CFが幅方向に拡幅される。
以下、本発明の一実施形態に係る繊維強化樹脂成形材料の製造方法として、上述したSMC製造装置を用いたSMCの製造方法について具体的に説明する。
次いで、開繊ステップにおいて、複数の開繊バー17の間に繊維束CFを通過させ、繊維束CFを幅方向に拡幅する。
具体的に、上記繊維束供給部10では、上記複数の回転刃18の代わりに、例えば図4A及び図4Bに示すような複数の鋸刃38を用いてもよい。なお、図4Aは、図1に示すSMC製造装置が備える繊維束供給部の別の構成例を示した側面図であり、図4Bはその分繊部を搬送方向から見た正面図である。
本発明の繊維強化樹脂成形材料の製造装置は、開繊部を備えないものであってもよい。
上記図1及び図2に示すSMC製造装置を用いてSMCを製造した。
分繊部には、4枚の回転刃18を備えるものを用いた。それぞれの回転刃18には、6個の刃物18aが周方向に連なって並んで配置されたものを用いた。それぞれの刃物18aは、繊維束CFに接触する部分の最大厚みが1mm、刃物の繊維束に接触する部分の最大幅が1mm、刃物の幅方向の先端部の角度(切っ先の角度)が64°、刃物の厚さ方向の刃角度(刃先角)が30°の略三角形の形状とした。各回転刃18の間においては、複数の刃物18aの周方向における位置を互いに一致させた。各回転刃18の間には、スペーサ部材18bを配置し、スペーサ部材18bの幅は2.2mmとした。
開繊バー17では繊維束CFを幅15mmに拡幅した。分繊時の繊維束CFの搬送速度は40m/minとした。4枚の回転刃18による分繊により、開繊後の繊維束CFに、長さ28.3mmの分繊部分と長さ0.5mmの未分繊部分とを、繊維束CFの長手方向に交互に連続するように、かつ繊維束CFの幅方向において3mm間隔で4列形成させた。裁断機13Aによる裁断は、分繊された繊維束CFの長手方向において25.4mm間隔で行った。裁断した繊維束CFは、第1のシートS1上に塗工したペーストP上に散布した。a/Lは1.11であり、a/(a+b)は0.98であった。
図1及び図2に示すSMC製造装置を用いてSMCを製造した。
分繊部には、1枚の回転刃18を備えるものを用いた。それぞれの刃物18aは、繊維束CFに接触する部分の最大厚みが0.5mm、刃物の繊維束に接触する部分の最大幅が0.5mm、刃物の幅方向の先端部の角度(切っ先の角度)が64°、刃物の厚さ方向の刃角度(刃先角)が30°の略三角形の形状とした。各回転刃18の間においては、複数の刃物18aの周方向における位置を互いに一致させた。各回転刃18の間には、スペーサ部材18bを配置し、スペーサ部材18bの幅は24.5mmとした。
繊維束CFとしては、炭素繊維束(三菱レイヨン社製、製品名:TRW40 50L、繊維数:50000本)を用いた。ペーストPとしては、ビニルエステル樹脂を用いた。
開繊バー17では繊維束CFを幅25mmに拡幅した。分繊時の繊維束CFの搬送速度は40m/minとした。4枚の回転刃18による分繊により、開繊後の繊維束CFに、長さ28.3mmの分繊部分と長さ0.6mmの未分繊部分を形成させた。裁断機13Aによる裁断は、分繊された繊維束CFの長手方向において25.4mm間隔で行った。裁断した繊維束CFは、第1のシートS1上に塗工したペーストP上に散布した。a/Lは1.11であり、a/(a+b)は0.98であった。
実施例1と同様の装置を使用して、炭素繊維束(三菱レイヨン社製、製品名:TR50S15L、繊維数:15000本)を用いた。開繊バー17では繊維束CFを幅15mmに拡幅した。分繊時の繊維束CFの搬送速度は40m/minとした。4枚の回転刃18による分繊により、開繊後の繊維束CFに、長さ20.4mmの分繊部分と長さ1mmの未分繊部分とを、繊維束CFの長手方向に交互に連続するように、かつ繊維束CFの幅方向において3mm間隔で4列形成させた。裁断機13Aによる裁断は、分繊された繊維束CFの長手方向において25.4mm間隔で行った。裁断した繊維束CFは、第1のシートS1上に塗工したペーストP上に散布した。a/Lは0.8であり、a/(a+b)は0.95であった。
このSMCの製造においては、分繊後の繊維束CFは、その一部がロール等に巻き付いてしまうことなく、安定して裁断部13に供給された。裁断された繊維束CFには、未分繊部分を有するものが一部存在したが、ペーストP上への繊維束CFの分散性に影響を与えるレベルではなかった。製造されたSMCの品質は、繊維数の少ない炭素繊維束CF(繊維数:3000本)を用い、分繊ステップなしで得られる同サイズのチョップド炭素繊維束を使用したSMCよりも、裁断後の繊維束が分割されないものがあり、強度が3割低下した結果であった。
実施例1と同様の装置を使用して、炭素繊維束(三菱レイヨン社製、製品名:TR50S15L、繊維数:15000本)を用いた。 開繊バー17では繊維束CFを幅15mmに拡幅した。分繊時の繊維束CFの搬送速度は40m/minとした。4枚の回転刃18による分繊により、開繊後の繊維束CFに、長さ28.3mmの分繊部分と長さ3.5mmの未分繊部分とを、繊維束CFの長手方向に交互に連続するように、かつ繊維束CFの幅方向において3mm間隔で4列形成させた。裁断機13Aによる裁断は、分繊された繊維束CFの長手方向において25.4mm間隔で行った。裁断した繊維束CFは、第1のシートS1上に塗工したペーストP上に散布した。a/Lは1.11であり、a/(a+b)は0.89であった。
このSMCの製造においては、分繊後の繊維束CFは、その一部がロール等に巻き付いてしまうことなく、安定して裁断部13に供給された。裁断された繊維束CFには、未分繊部分を有するものが一部存在したが、ペーストP上への繊維束CFの分散性に影響を与えるレベルではなかった。製造されたSMCの品質は、繊維数の少ない炭素繊維束CF(繊維数:3000本)を用い、分繊ステップなしで得られる同サイズのチョップド炭素繊維束を使用したSMCよりも、裁断後の繊維束が分割されないものがあり、強度が3割低下した結果であった。
実施例1と同様の装置を使用して、炭素繊維束(三菱レイヨン社製、製品名:TR50S15L、繊維数:15000本)を用いた。 開繊バー17では繊維束CFを幅15mmに拡幅した。分繊時の繊維束CFの搬送速度は40m/minとした。4枚の回転刃18による分繊により、開繊後の繊維束CFに、長さ28.3mmの分繊部分と長さ0mmの未分繊部分とを、繊維束CFの長手方向に交互に連続するように、かつ繊維束CFの幅方向において3mm間隔で4列形成させた。裁断機13Aによる裁断は、分繊された繊維束CFの長手方向において25.4mm間隔で行った。裁断した繊維束CFは、第1のシートS1上に塗工したペーストP上に散布した。a/Lは1.11であり、a/(a+b)は1であった。
このSMCの製造においては、分繊後の繊維束CFは、その一部がロール等に巻き付いてしまい、製造することができなかった。
Claims (18)
- 裁断した繊維束のフィラメント間に樹脂を含浸させたシート状の繊維強化樹脂成形材料の製造方法であって、
下式(1)の条件を満たすように、連続する繊維束を長手方向において断続的に分繊し、長手方向に間隔を空けて裁断して前記の裁断した繊維束を得る、繊維強化樹脂成形材料の製造方法。
1≦a/L ・・・(1)
(ただし、前記式(1)中、aは前記の連続する繊維束における分繊部分の長さであり、Lは前記繊維束の長手方向における裁断される間隔である。) - さらに、下式(2)の条件を満たすように前記分繊及び前記裁断を行う、請求項1に記載の繊維強化樹脂成形材料の製造方法。
a/L≦10 ・・・(2) - 裁断した繊維束のフィラメント間に樹脂を含浸させたシート状の繊維強化樹脂成形材料の製造方法であって、
下式(3)の条件を満たすように、連続する繊維束を長手方向において断続的に分繊し、長手方向に間隔を空けて裁断して前記の裁断した繊維束を得る、繊維強化樹脂成形材料の製造方法。
0.9≦a/(a+b)<1 ・・・(3)
(ただし、前記式(3)中、aは前記の連続する繊維束における分繊部分の長さであり、bは前記の連続する繊維束における断続的な分繊部分間に存在する未分繊部分の長さである。) - 前記樹脂が熱硬化性樹脂である、請求項1~3のいずれか一項に記載の繊維強化樹脂成形材料の製造方法。
- 前記の断続的な分繊を、前記の連続する繊維束に刃物を間欠的に突き刺すことによって行う、請求項1~4のいずれか一項に記載の繊維強化樹脂成形材料の製造方法。
- 前記の連続する繊維束の幅方向に所定の間隔で並ぶ連なった複数の刃物を、前記の連続する繊維束に間欠的に突き刺して、分繊された複数の繊維束の各間を部分的に未分繊の状態とする、請求項1~5のいずれか一項に記載の繊維強化樹脂成形材料の製造方法。
- 所定の方向に搬送される第1のシートの上に樹脂を含むペーストを塗工するステップと、
連続する繊維束を複数の繊維束に分繊するステップと、
前記分繊された繊維束を裁断機で裁断して、前記ペーストの上に散布するステップと、
前記繊維束が散布された第1のシートの上に、前記ペーストが塗工された第2のシートを重ね合わせた後、前記第1のシートと前記第2のシートとの間に挟み込まれた前記ペースト及び前記繊維束を加圧することによって、前記繊維束のフィラメント間に樹脂を含浸させるステップと、を含む、請求項1~6のいずれか一項に記載の繊維強化樹脂成形材料の製造方法。 - 前記の連続する繊維束を複数の繊維束に分繊するステップにおいて、連続する繊維束の幅方向に所定の間隔で並ぶ、連なった複数の刃物が周方向に並んで配置された複数の回転刃を用いて、前記回転刃を回転させながら、前記の連続する繊維束に前記の複数の刃物を間欠的に突き刺す、請求項7に記載の繊維強化樹脂成形材料の製造方法。
- 前記の連続する繊維束を複数の繊維束に分繊するステップにおいて、前記の複数の刃物が前記繊維束の搬送方向と同一方向に並んで配置された鋸刃を用いて、前記鋸刃を上下方向に揺動させながら、前記の連続する繊維束に前記の複数の刃物を間欠的に突き刺す、請求項7に記載の繊維強化樹脂成形材料の製造方法。
- 前記の連続する繊維束を複数の繊維束に分繊するステップにおいて、前記連続する繊維束を厚み方向に重ね合わせた状態で、複数の繊維束に分繊する、請求項7~9のいずれか一項に記載の繊維強化樹脂成形材料の製造方法。
- 前記の連続する繊維束を幅方向に開繊した後に、前記の連続する繊維束を複数の繊維束に分繊するステップにおいて、開繊された繊維束を複数の繊維束に分繊する、請求項7~10のいずれか一項に記載の繊維強化樹脂成形材料の製造方法。
- 裁断した繊維束のフィラメント間に樹脂を含浸させたシート状の繊維強化樹脂成形材料を製造する繊維強化樹脂成形材料の製造装置であって、
連続する繊維束を複数の繊維束に分繊する分繊部と、分繊された繊維束を裁断機で裁断する裁断部と、を含み、
前記分繊部は、前記の連続する繊維束に刃物を間欠的に突き刺すことによって、分繊された複数の繊維束の各間を部分的に未分繊の状態とする、繊維強化樹脂成形材料の製造装置。 - 前記刃物が、前記連続する繊維束の幅方向に所定の間隔で並ぶ連なった複数の刃物である、請求項12に記載の繊維強化樹脂成形材料の製造装置。
- 所定の方向に搬送される第1のシートの上に樹脂を含むペーストを塗工する塗工部と、
前記分繊部と、
分繊された繊維束を裁断機で裁断して、前記ペーストの上に散布する裁断部と、
前記繊維束が散布された第1のシートの上に、前記ペーストが塗工された第2のシートを重ね合わせた後、前記第1のシートと前記第2のシートとの間に挟み込まれた前記ペースト及び前記繊維束を加圧することによって、前記繊維束のフィラメント間に樹脂を含浸させる含浸部とを含む、請求項12又は13に記載の繊維強化樹脂成形材料の製造装置。 - 前記分繊部が、複数の刃物が周方向に並んで配置された回転刃を備え、前記回転刃を回転させながら、前記の連続する繊維束に前記の複数の刃物を間欠的に突き刺すものである、請求項12~14のいずれか一項に記載の繊維強化樹脂成形材料の製造装置。
- 前記分繊部が、複数の刃物が前記繊維束の搬送方向と同一方向に並んで配置された鋸刃を備え、前記鋸刃を上下方向に揺動させながら、前記の連続する繊維束に前記の複数の刃物を間欠的に突き刺すものである、請求項12~14のいずれか一項に記載の繊維強化樹脂成形材料の製造装置。
- 前記刃物を挟んだ搬送方向の両側に配置された一対のガイド部材を備え、前記一対のガイド部材の間で搬送される前記の連続する繊維束に対して、前記一対のガイド部材が配置された側とは反対側から前記刃物を突き刺す、請求項12~16のいずれか一項に記載の繊維強化樹脂成形材料の製造装置。
- 前記幅方向に並ぶ前記の複数の刃物の各間に配置されたスペーサ部材を備え、前記の連続する繊維束に前記スペーサ部材が接する位置まで前記の複数の刃物を突き刺す、請求項13~17のいずれか一項に記載の繊維強化樹脂成形材料の製造装置。
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| EP16821457.5A EP3321054B1 (en) | 2015-07-07 | 2016-07-07 | Method and apparatus for manufacturing fiber-reinforced resin molding material |
| US15/741,615 US20180194082A1 (en) | 2015-07-07 | 2016-07-07 | Method and apparatus for producing fiber-reinforced resin molding material |
| EP20178020.2A EP3722061B2 (en) | 2015-07-07 | 2016-07-07 | Uses of a continuous fiber bundle in methods for producing fiber-reinforced resin molding material |
| EP22163187.2A EP4035860B1 (en) | 2015-07-07 | 2016-07-07 | Method and apparatus for producing fiber-reinforced resin molding material |
| EP20189574.5A EP3750679B1 (en) | 2015-07-07 | 2016-07-07 | Method for producing fiber-reinforced resin molding material |
| CN202010921119.8A CN112078056B (zh) | 2015-07-07 | 2016-07-07 | 纤维增强树脂成型材料及其制造方法、连续碳纤维束及其分纤方法 |
| EP21171166.8A EP3875239B1 (en) | 2015-07-07 | 2016-07-07 | Method for producing fiber-reinforced resin molding material |
| CN201680039647.2A CN107848146B (zh) | 2015-07-07 | 2016-07-07 | 纤维增强树脂成型材料的制造方法以及制造装置 |
| US17/216,294 US11518116B2 (en) | 2015-07-07 | 2021-03-29 | Method and apparatus for producing fiber-reinforced resin molding material |
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