WO2018155151A1 - 樹脂含浸繊維束巻取体の製造方法 - Google Patents
樹脂含浸繊維束巻取体の製造方法 Download PDFInfo
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- WO2018155151A1 WO2018155151A1 PCT/JP2018/003853 JP2018003853W WO2018155151A1 WO 2018155151 A1 WO2018155151 A1 WO 2018155151A1 JP 2018003853 W JP2018003853 W JP 2018003853W WO 2018155151 A1 WO2018155151 A1 WO 2018155151A1
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- resin
- fiber bundle
- winding
- impregnated fiber
- thickness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
- B29C53/62—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels rotatable about the winding axis
- B29C53/66—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels rotatable about the winding axis with axially movable winding feed member, e.g. lathe type winding
- B29C53/665—Coordinating the movements of the winding feed member and the mandrel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/56—Tensioning reinforcements before or during shaping
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/10—Measuring arrangements characterised by the use of optical techniques for measuring diameters of objects while moving
- G01B11/105—Measuring arrangements characterised by the use of optical techniques for measuring diameters of objects while moving using photoelectric detection means
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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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
- B29C53/8016—Storing, feeding or applying winding materials, e.g. reels, thread guides, tensioners
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0691—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of objects while moving
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
- G01B17/025—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness for measuring thickness of coating
Definitions
- the present invention relates to a method for producing a resin-impregnated fiber bundle wound body relating to a fiber reinforced plastic (Fiber Reinforced Plastic, FRP) pipe or pressure vessel.
- FRP Fiber Reinforced Plastic
- FRP is a composite material in which a resin is reinforced with reinforcing fibers and is widely used because it is lighter than metal materials such as iron and aluminum but can exhibit strength and rigidity equal to or higher than that of metal materials. .
- fiber bundles composed of a plurality of single fibers and liquid resin are generally in separate forms, and the fiber bundle and resin are combined by various production means. It is necessary to make it.
- a fiber bundle wound in a bobbin shape is continuously unwound, and the fiber bundle is combined and impregnated with a resin.
- a product rein-impregnated fiber bundle wound body
- the fiber bundle is stabilized in shape without twisting or folding in the process, It is important for process control to stabilize the mixing ratio with the resin, that is, the fiber content (or resin content) within the appropriate value range set according to the product, and various technological developments have been made so far.
- Patent Document 1 discloses a non-contact-type outer diameter measuring instrument that measures the outer diameter of an intermediate body without contacting the intermediate body, which is performing a winding process of winding a fiber bundle on a winding core. Depending on the outer diameter of the intermediate detected at each step during the winding process, the position and angle of the fiber bundle feeding head are finely adjusted to stabilize the fiber bundle at the desired winding angle. Technology for improving quality is described.
- Patent Document 2 immediately before winding of the fiber bundle in the FW device, the fiber content is detected by optically measuring the capacitance or thickness of the fiber bundle adhered and impregnated with resin in the process. A technique is described in which the amount of resin adhesion in the upstream process is increased or decreased in accordance with the determined value, and the fiber content of the product is accurately managed.
- the fiber bundle in order to prevent the fiber bundle from stabilizing during the process and from loosening during or after winding, the fiber bundle is conveyed and wound by applying tension to the fiber bundle. Is made. That is, on the winding core, the inner-layer-side resin-impregnated fiber bundle wound first is clamped by the outer-layer-side resin-impregnated fiber bundle wound around the inner-core-side resin-impregnated fiber bundle wound around it. The adhered resin is squeezed out.
- the fiber content in the intermediate or the final product is not the same as the fiber content in the process, and as shown in a cross-sectional view in FIG. 2, the inner layer side has a higher fiber content than the fiber content in the process.
- An actual resin-impregnated fiber bundle layer 11 having a content rate is produced, and an excess resin layer 12 that is a resin-only layer not containing the fiber bundle is produced on the outer layer side.
- the contribution ratio of the product performance is large in the state of the actual resin-impregnated fiber bundle layer 11 including the fiber bundle, and the contribution ratio of the state of the surplus resin layer 12 is small. Also, if the thickness of the excess resin layer 12 is excessively large in the intermediate body, depending on the type of resin, the frictional force that holds the fiber bundle on the outer surface of the intermediate body during the winding process becomes small, and the fiber bundle slips. The fiber bundle cannot be arranged as designed, and the fiber bundle may be loosened.
- an object of the present invention is to provide a method for producing a resin-impregnated fiber bundle wound body that contributes to product quality improvement by grasping the state of the resin-impregnated fiber bundle layer after winding and reflecting the condition in the production conditions.
- an unwinding step of unwinding the fiber bundle from the bobbin The winding head freely moves with respect to the core rotating on the fixed shaft, and has at least a winding step of obtaining a product by winding the fiber bundle on the core.
- a resin-impregnated fiber bundle wound body including a guiding step including a guide member for guiding the fiber bundle fed out in the unwinding step to the winding step
- a manufacturing method comprising: In either the guiding step or the winding step, performing a resin adhesion operation for impregnating the fiber bundle with resin, In the winding step, a fiber content calculation operation for calculating the fiber content V f (%) of the resin-impregnated fiber bundle layer in the intermediate in which the winding operation for winding the resin-impregnated fiber bundle on the winding core is further performed.
- the resin-impregnated fiber bundle layer thickness calculating operation for calculating the thickness t FRP of the resin-impregnated fiber bundle layer in the intermediate is further performed, The method for producing a resin-impregnated fiber bundle wound body according to (1), wherein the fiber content rate calculating operation is performed using the thickness t FRP .
- the resin-impregnated fiber bundle layer thickness calculation operation is: Including an outer diameter measuring operation for measuring an outer diameter of the winding core or the intermediate body during the winding operation, Measured by the outer diameter measuring operation, first the outer diameter d 1 is an outer diameter of the winding core or the intermediate at the first time t 1, the second time t later than the first time t 1 using the second and outer diameter d 2 is the outer diameter of the intermediate in 2, the first from time t 1 of the resin-impregnated fiber bundle layer formed between the up second time t 2 thickness t
- the resin impregnated fiber bundle layer thickness calculation operation is: A surplus resin layer thickness measurement operation for measuring the thickness of the surplus resin layer generated on the outer surface of the intermediate, Said first outer diameter d 1, and the second outer diameter d 2, with a thickness t r of the excess resin layer in the surplus resin layer the second time measured by the thickness measurement operation t 2, the second calculating a time thickness t FRP of the resin-impregnated fiber bundle layer formed between the t 1 to the second time t 2, the resin-impregnated fiber Tabamaki up body manufacturing method according to (3).
- the present invention it becomes possible to set the production conditions based on the fiber content of the resin-impregnated fiber bundle layer after winding, which can contribute to the improvement of product quality.
- a method for producing a resin-impregnated fiber bundle wound body according to the present invention will be described using the embodiment shown in FIG.
- at least the unwinding step 100 for unwinding the fiber bundle 1 from the fiber bundle bobbin 101 to which no resin is adhered, and the winding of the fiber bundle 1 unwound in the unwinding step is a downstream step.
- the process 300 includes a resin attaching unit 401 that attaches resin to the fiber bundle.
- the “guide” or “guide member” (for example, expressed as the unwinding guide 102 or the guide guide 201) appearing in the present specification refers to the fiber bundle 1 fed out from the fiber bundle bobbin 101.
- FIG. 3 shows general shapes 51, 52, 53, and 54 of the guide member.
- the shape of the guide members 51 to 54 is a rod-like member that extends long in one direction, and preferably has a rotationally symmetric shape with a long axis (center axis 55) as the rotation axis. More specifically, the shape (51) may be uniform in the direction of the central axis 55, or may be a shape including a part that changes continuously or discontinuously (52, 53, 54).
- the guide member is disposed so that the central axis 55 and the traveling direction of the fiber bundle 1 are substantially orthogonal to each other, and the fiber bundle 1 travels while being in contact with the rotationally symmetric outer peripheral surface. It is possible to restrict the position of 1 to a predetermined position.
- the width direction of the fiber bundle 1 is aligned with the direction of the central axis 55 of the guide member (in the example of FIG. 5, the guide member 51) so that the ideal passing state of the fiber bundle 1 is shown in FIG.
- the reaction force F can be applied not in the width direction of the fiber bundle 1 but in the thickness direction, and as a result, the fiber bundle can be hardly twisted or folded.
- the roller member that can rotate around the central axis 55 is configured to be able to run the fiber bundle 1 without giving excessive resistance to the fiber bundle 1,
- the fixed guide bar member that cannot rotate around the central axis 55 may be configured so as to be able to travel with resistance applied to the fiber bundle 1. It is possible to select according to a predetermined purpose to be fulfilled by the guide member arranged in each process.
- the unwinding process 100 includes at least a fiber bundle bobbin 101 and a unwinding guide 102.
- the number of unwinding guides 102 for guiding the fiber bundle 1 unwound from the fiber bundle bobbin 101 to the guiding process 200 is an optimum number for each manufacturing process from the viewpoint of manufacturing facility layout constraints and economy. Selected.
- the axial direction of the unwinding guide 102 is important to be orthogonal to the traveling direction of the fiber bundle 1, and the axial direction of the fiber bundle bobbin 101 may coincide with the axial direction, or may be orthogonal. It may be arranged at a twisted position.
- the number of fiber bundle bobbins 101 it is possible to select an optimum number for each manufacturing process from the viewpoint of manufacturing facility layout restriction and economical efficiency.
- reinforcing fibers such as inorganic fibers such as glass fibers generally used as reinforcing fibers for FRP, organic fibers such as carbon fibers and aramid fibers, or a plurality of kinds thereof are used.
- inorganic fibers such as glass fibers generally used as reinforcing fibers for FRP
- organic fibers such as carbon fibers and aramid fibers, or a plurality of kinds thereof are used.
- carbon fiber or glass fiber because the rigidity and strength of the resulting resin-impregnated fiber bundle wound body can be increased.
- the guiding process 200 includes at least a guiding guide 201 for guiding the fiber bundle 1 unwound in the unwinding process 100 to a winding process 300 that is a downstream process.
- the number of guide guides 201 and the axial direction are determined based on the same idea as the unraveling guide 101. That is, as for the number of guides 201, an optimum number is selected for each manufacturing process from the viewpoint of manufacturing facility layout constraints and economical efficiency, and the axial direction of the guides 201 is in the traveling direction of the fiber bundle 1. It is important that they are orthogonal to each other, and the axial direction and the axial direction of the fiber bundle bobbin 101 arranged in the unwinding step 100 may be the same, or may be orthogonal, and the position of the twist May be arranged.
- Winding process 300 In the winding process 300, the winding core 301 that is the winding object, the winding head 302 that is freely movable with respect to the winding core 301, and the fiber bundle 1 sent from the guiding process 200 are transferred to the winding core 301. And a winding guide 303 for guiding at least.
- the fiber bundle 1 sent from the guiding process 200 passes through a winding guide 303 provided on the winding head 302, and can be rotated on an axis fixed in the space. It is wound around the core 301.
- the winding head 302 performs winding on the core 301 while moving its position freely according to the fiber bundle winding amount and winding angle designed in advance according to the required characteristics of the product.
- the resin-impregnated fiber bundle wound body 304 is manufactured.
- the number and the axial direction of the winding guides 303 are determined based on the same idea as the unwinding guide 101 and the guide guide 201. That is, as for the number of winding guides 303, an optimal number is selected for each manufacturing process from the viewpoints of manufacturing facility layout constraints and economy, and the fiber bundle 1 travels in the axial direction of the winding guides 303. It is important that the direction is perpendicular to the direction, and the axial direction of the core 301 may coincide with the axial direction, may be orthogonal, or may be arranged at a twisted position. .
- the most suitable core 301 is selected in accordance with the product shape and required functions. For example, in the manufacture of a hollow pipe member, a cylindrical winding core that can be decentered after a resin-impregnated fiber bundle winding process or after passing through a resin curing step when using a thermosetting resin, or by heating, etc. Various shapes of cores that can be decentered by melting can be used. In the production of the pressure vessel, various liner members made of metal or resin, which are cores that ensure a sealing property against a predetermined container, can be used.
- the finishing process consists of a resin curing process after winding and additional work such as trimming of excess parts. After that, it becomes the final product.
- a hardening process and a finishing process are good also as a structure which can be implemented in the same place, without moving from a winding process, and it is good also as a structure which is moved from a winding process and implemented in another place.
- the resin adhering means 401 is a process for adhering the resin 2 to the fiber bundle 1, but in the guiding step 200 as shown in FIG. 1 or in the winding step 300 (more preferably, as shown in FIG. 6). On the attachment head 302).
- the impregnation roller type resin adhering means 401 shown in the drawing is merely an example.
- a dip method in which the fiber bundle is directly passed through the resin, the fiber bundle is drawn into the impregnation die, and a separately weighed resin is placed inside the die.
- various resin adhering means can be applied.
- the fiber bundle 1 passes through the guide guide 201 (or the winding guide 303), then passes over the impregnation roller 403, and passes through another guide guide 201 (or the winding guide 303). It passes through and is sent downstream in the process.
- the resin bath 402 containing the impregnation roller 403 is filled with the resin 2, and the resin adheres to the surface of the impregnation roller 402 by arranging the lower part of the impregnation roller 403 to pass through the resin 2.
- the fiber bundle 1 passes over the impregnation roller 403 so that an appropriate amount of resin is fed to the fiber bundle 1. 2 can be deposited.
- the resin 2 is preferably in a liquid form, and a thermosetting resin such as an epoxy resin or an unsaturated polyester resin, or a thermoplastic resin such as a polyamide resin is selected according to the use of the final product, the specification environment, and the required product characteristics. However, there are no particular restrictions. From the viewpoint of workability and energy consumption, a thermosetting resin such as an epoxy resin is preferable because the impregnation step can be carried out with the resin temperature being substantially low.
- a thermosetting resin such as an epoxy resin is preferable because the impregnation step can be carried out with the resin temperature being substantially low.
- the viscosity of the impregnating resin from the viewpoint of impregnation properties, it is better to be low, but if it is too low, the resin will drip before sufficiently impregnating into the fiber bundle, and there is a possibility that the predetermined resin content cannot be maintained.
- a suitable viscosity is necessary. Specifically, it is preferably in the range of 10 to 2000 mPa ⁇ s. More preferably, it is in the range of 100 to 1100 mPa ⁇ s.
- impregnation promotion means 501 installed for the purpose of further promoting resin impregnation (penetration) may be included.
- the impregnation promoting means 501 includes at least one impregnation guide 502 (ironing bar).
- the impregnation guide 502 is usually installed in a state in which the rotation around the central axis of the guide is constrained.
- the fiber bundle 1 passes over the impregnation guide 502
- the fiber bundle 1 is separated from the impregnation guide 502 with respect to its thickness direction.
- Receive reaction force By this reaction force, further impregnation into the fiber bundle of the resin 2 adhered to the fiber bundle 1 by the resin adhesion means 401 is promoted, and the void remaining in the fiber bundle 1 can be replaced with the resin 2. It is.
- the traveling speed of the fiber bundle 1 is preferably in the range of 0.1 to 300 m / min from the viewpoint of production efficiency. If the running speed is too high, the resin impregnation time cannot be secured and the product quality may be deteriorated. In addition, since the running resistance of the fiber bundle 1 is increased and the amount of running fiber per unit time is increased, the amount of fluff generated is increased, and maintenance may not catch up, which may cause trouble such as yarn breakage.
- the present invention is characterized in that the index used for manufacturing condition management is the fiber content V f (%) of the resin-impregnated fiber bundle layer in the intermediate.
- the means for calculating the fiber content V f (%) is not particularly limited as long as it is a means capable of accurately grasping the fiber content in the intermediate.
- X-rays or the like can be used for measuring and transmitting the resin-impregnated fiber bundle layer, and it is possible to calculate the fiber content using the thickness t FRP (mm) of the resin-impregnated fiber bundle layer. Is relatively easy and preferable.
- the input amount of fiber bundle is generally known and the thickness of the fiber bundle layer without resin can be calculated. Therefore, the thickness t FRP (mm) of the resin-impregnated fiber bundle layer should be measured. in it is possible to calculate the fiber content V f (%).
- the method for measuring the thickness t FRP (mm) of the resin-impregnated fiber bundle layer is not particularly limited as long as it is a means capable of accurately detecting the thickness of the resin-impregnated fiber bundle layer.
- it is a non-contact type measuring means that can measure without stopping the process and is less likely to cause contamination by foreign matter and fiber bundles by touching the intermediate body.
- the object of the present invention can be achieved by controlling the production conditions so that the fiber content V f (%) obtained by the above formula (1) falls within an appropriate range determined for each type. That is, since the input amount of the fiber bundle 1 is known as described above in the kind designed in advance, the increase or decrease in the amount of resin adhered by the resin adhering means or the amount of resin squeeze out, or in some cases surplus resin The object of the present invention can be achieved by removing the above.
- the production condition control target includes at least one of the following: increase / decrease in the amount of resin adhesion in the resin adhesion means, increase / decrease in the fiber bundle winding tension, removal amount of excess resin in the intermediate, and resin viscosity in the intermediate It is preferable that In addition, a plurality of items described above may be combined, and even if it is a control target not listed here, it is selected as long as it contributes to the management of the fiber content V f (%) in the intermediate. Is possible.
- the resin adhesion amount in the resin adhesion means 401 is controlled.
- the resin adhesion amount control method varies depending on the system of the resin adhesion means 401, in the illustrated impregnation roll system example, the distance between the impregnation roller 403 and the scraping member 404 is increased or decreased. Thus, the amount of resin adhesion can be increased or decreased.
- the position of the scraping member 404 is adjusted by driving a motor or the like, and automatically corresponding to the calculated fiber content V f (%). It is good also as a structure controlled by.
- ⁇ Fiber bundle winding tension> When it is determined that the tension at the time of winding is excessive or insufficient, the tension is controlled by means such as increase / decrease of tension applied when the fiber bundle bobbin 101 is unwound and adjustment of the configuration of the guide member in each process. Can do. Further, another tension adjusting mechanism (not shown) may be further included in the process.
- the type of tension adjusting mechanism is not particularly limited, and various forms such as a dancer roll and a mechanism by adjusting the number and height of guide members can be selected.
- the senor further includes a tension sensor and load cell in the process, and the tension adjustment mechanism is automatically controlled using the measured value as a control parameter to bring the winding tension within the appropriate range. It is good also as a structure to control.
- the surplus resin removal method is not particularly limited as long as the purpose of removing the surplus resin generated on the outer surface of the intermediate is fulfilled.
- a method of rotating the intermediate body while pressing a flat scraping member typified by a spatula against the outer surface of the intermediate body, or moving the spatula while pressing the spatula against the outer surface of the intermediate body that is not rotating Various methods such as a method, a method of removing a resin by bringing a substance adsorbing excess resin into contact with the outer surface, and a method of removing a resin by a centrifugal force generated by rotating an intermediate at high speed can be selected.
- the position of the scraping member is adjusted by driving a motor or the like, and the resin is automatically removed. It is good also as a structure.
- ⁇ Adjustment of resin viscosity in intermediate> When it is determined that the amount of resin squeezed out in the intermediate is excessive or insufficient, the amount of resin squeezed out can be controlled by adjusting the resin viscosity in the intermediate.
- the means for adjusting the resin viscosity is not particularly limited as long as it can achieve the purpose of adjusting the resin viscosity, but a method of heating or cooling the intermediate is preferable because it is relatively easy to implement.
- the intermediate when the squeezing amount of the resin is too small, the intermediate can be heated to promote the squeezing of the resin, and the resin viscosity can be lowered.
- the intermediate when it is determined that the squeezing of the resin has become excessive, the intermediate can be cooled to suppress the squeezing of the resin, and the resin viscosity can be increased.
- hardening is accelerated
- the heating amount or the cooling amount may be automatically controlled corresponding to the calculated fiber content V f (%).
- FIG. 8 shows an example of a winding step 300 that further includes an outer diameter measuring means 310 capable of measuring the thickness t FRP (mm) of the resin-impregnated fiber bundle layer during the winding process.
- the outer diameter measuring means 310 is not particularly limited as long as it can operate during the winding process around the manufacturing facility, and various means can be applied.
- the outer diameter measuring unit 310 is not necessarily fixed on the winding head 302, and the outer diameter measuring unit 310 may be fixed around the winding core 301.
- the outer diameter measuring means 310 using photoelectric means using laser light is illustrated, and it is composed of at least a pair of light transmitting section 311 and light receiving section 312.
- a light beam is emitted on the line from the light transmitting unit 311, but a light beam 312 that is blocked by the resin-impregnated fiber bundle wound body 304 is generated and blocked by the resin-impregnated fiber bundle winder 304. Only the unreachable light beam 314 reaches the light receiving unit 312. That is, the range in which the light ray 313 to be blocked is present indicates the outer diameter of the resin-impregnated fiber bundle wound body 304. Further, as shown in FIG.
- the outer diameter of the intermediate can be calculated based on the respective measured values.
- the method using photoelectric means can detect the outer diameter in a short time and does not require stopping the process for measuring the outer shape, which is a preferable embodiment from the viewpoint of manufacturability.
- the outer diameter d 2 (mm) of the intermediate body shown in FIG. 10B is measured.
- the winding process is progressing time t 1 compared.
- d 2 By taking the difference between mm) and d 1 (mm), it is possible to calculate the thickness t FRP (mm) of the resin-impregnated fiber bundle that is wound between time t 1 and time t 2 and finally remains.
- the thickness t FRP (mm) of the resin-impregnated fiber bundle layer formed in between the t 1 t 2 may be defined as Equation (2).
- the fiber content V f (%) in the resin-impregnated fiber bundle layer 10 after winding can be obtained by applying the formula (1) to the obtained thickness t FRP (mm) of the resin-impregnated fiber bundle layer. Therefore, quality control that reflects the resin dripping during the process and the resin dripping on the core becomes possible.
- a more preferable configuration capable of accurately calculating the thickness of only the actual resin-impregnated fiber bundle layer 11 further includes an excess resin thickness measuring means 320 as shown in FIG.
- the surplus resin thickness measuring means 320 does not need to be configured to be fixed on the winding head 302 as shown in FIG. 11, and may be configured to be fixed around the winding core 301.
- the surplus resin thickness measuring means 320 is a means that can extract only the thickness of the surplus resin layer 12, and is not particularly limited as long as it is a means that can be operated during the winding process around the manufacturing facility. Various means such as an ultrasonic method and a photoelectric method can be applied.
- the surplus resin thickness measuring means 320 shown in FIG. 12 exemplifies a contact type ultrasonic thickness meter 330.
- the incident wave 321 is reflected at the interface between the resin-impregnated fiber bundle layer 11 and the surplus resin layer 12 and becomes a reflected wave 322, which is again taken into the surplus resin thickness measuring means 320.
- the thickness of the surplus resin layer 12 can be calculated by using the sound velocity inside.
- the surplus resin thickness measuring means 320 shown in FIG. 14 exemplifies a non-contact type laser film thickness meter 331.
- a part of the light rays is reflected on the surface of the surplus resin layer 12 to be first reflected light 324 and taken into the laser film thickness meter 331.
- the remaining light passes through the surplus resin layer 12, is reflected on the surface of the actual resin-impregnated fiber bundle layer 11, becomes the second reflected light 325, and is taken into the laser film thickness meter 331.
- the thickness of the surplus resin layer 12 can be calculated by recognizing and processing the first reflected light 324 and the second reflected light 325 individually.
- a photoelectric system such as a laser film thickness meter can detect the thickness of the surplus resin layer 12 in a short time, and it is not necessary to stop the process for measuring the outer shape, which is preferable from the viewpoint of manufacturability. It is.
- the fiber content V f (%) in the actual resin-impregnated fiber bundle layer 11 is obtained. Therefore, it is possible to perform more advanced quality control reflecting the resin squeezing out on the core.
- the contact-type measuring method there is a method of winding the tape measure around the resin-impregnated fiber bundle wound body 304 and calculating the outer diameter from the circumferential length.
- a formula outer diameter measuring method is a preferred embodiment.
- FIG. 16 shows an example of a manufacturing method including the sandwiching type outer diameter measuring means 340.
- the sandwiching type outer diameter measuring means 340 is composed of at least a pair of measuring heads 341, and the pair of measuring heads 341 sandwiches the resin-impregnated fiber bundle winding body 304, so that the resin-impregnated fibers are determined from the relative positional relationship of the measuring head 341.
- the outer diameter of the bundle wound body 304 can be calculated, and the thickness of the resin-impregnated fiber bundle layer can be measured from the difference from the diameter of the core 301.
- the excess resin 12 is pushed away as shown in FIG. Since the outer diameter can be measured, the thickness 11 of the actual resin-impregnated fiber bundle layer can be measured.
- the measurement head 341 sandwiches the resin-impregnated fiber bundle winding body 304, and the outer diameter is measured. It is preferable to measure the diameter.
- Fiber bundle 2 Resin 10: Resin-impregnated fiber bundle layer 11: Actual resin-impregnated fiber bundle layer 12: Surplus resin layers 51, 52, 53, 54: Examples of guide members 55: Center shaft 100: Unwinding step 101 : Fiber bundle bobbin 102: Unwinding guide 200: Guiding process 201: Guiding guide 300: Winding process 301: Winding core 302: Winding head 303: Winding guide 304: Resin-impregnated fiber bundle wound body 310: Measurement of outer diameter Means 311: Light transmitting section 312: Light receiving section 313: Light beam 314: Unshielded light beam 320: Surplus resin layer thickness measuring means 321: Incident wave 322: Reflected wave 323: Incident light 324: First reflected light 325: First 2 reflected light 330: ultrasonic thickness meter 331: laser film thickness meter 340: sandwiching type outer diameter measuring means 341: measuring head 401: resin adhesion means 402: resin bath 403: impre
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Abstract
Description
(1)ボビンから繊維束を繰り出す解舒工程と、
固定軸上で回転する巻芯に対し、巻付けヘッドが自在に移動し、繊維束を巻芯上に巻き付けることで製品を得る巻付け工程とを少なくとも有し、
前記解舒工程と前記巻付け工程との間に、前記解舒工程で繰り出された繊維束を前記巻付け工程へと誘導するガイド部材を備えた誘導工程を含む樹脂含浸繊維束巻取体の製造方法であって、
前記誘導工程または前記巻付け工程のいずれかにおいて、繊維束に樹脂を含浸させる樹脂付着操作を実施するとともに、
前記巻付け工程において、巻芯上に樹脂含浸繊維束を巻き付ける巻付け操作を実施中の中間体における樹脂含浸繊維束層の繊維含有率Vf(%)を計算する繊維含有率計算操作をさらに実施し、
前記繊維含有率Vf(%)の値に応じて、
(i)前記樹脂付着操作における樹脂付着量
(ii)前記中間体への繊維束巻付け張力
(iii)前記中間体の外表面上に生じた余剰樹脂の除去量
(iv)前記中間体上の樹脂粘度
のいずれか1つ以上を制御することを特徴とする樹脂含浸繊維束巻取体の製造方法。
前記厚みtFRPを用いて前記繊維含有率計算操作を実施する、(1)に記載の樹脂含浸繊維束巻取体の製造方法。
前記巻付け操作を実施中の前記巻芯または前記中間体の外径を計測する外径計測操作を含み、
該外径計測操作によって計測された、第1時刻t1における前記巻芯または前記中間体の外径である第1外径d1と、前記第1時刻t1よりも後の第2時刻t2における前記中間体の外径である第2外径d2とを用いて、前記第1時刻t1から前記第2時刻t2までの間に形成された前記樹脂含浸繊維束層の厚みtFRPを計算する、(2)に記載の樹脂含浸繊維束巻取体の製造方法。
前記中間体の外表面上に生じた余剰樹脂層の厚みを計測する余剰樹脂層厚み計測操作をさらに含み、
前記第1外径d1と、前記第2外径d2と、前記余剰樹脂層厚み計測操作によって計測された前記第2時刻t2における余剰樹脂層の厚みtrとを用いて、前記第1時刻t1から前記第2時刻t2までの間に形成された前記樹脂含浸繊維束層の厚みtFRPを計算する、(3)に記載の樹脂含浸繊維束巻取体の製造方法。
<工程概要>
図1に示す実施例を用いて、本発明に係る樹脂含浸繊維束巻取体の製造方法について説明する。本製造方法は少なくとも、樹脂の付着していない繊維束ボビン101から繊維束1を巻き出す解舒工程100と、前記解舒工程で巻き出された繊維束1を下流側の工程である巻付け工程300へと導く誘導工程200と、前記誘導工程200から導かれた繊維束1を、巻付けヘッド302を介して巻芯301上に巻き付けることで樹脂含浸繊維束巻取体304を得る巻付け工程300と、繊維束に樹脂を付着させる樹脂付着手段401と、から構成される。
以下、本明細書中に登場する“ガイド”または“ガイド部材”(例えば、解舒ガイド102や誘導ガイド201などのように表記する)とは、繊維束ボビン101から繰り出された繊維束1に接触させて用いられ、繊維束1に不必要なねじれや折り畳みを与えることなく、その高さや方向を変化させながら巻芯まで誘導して、巻芯に巻き付けることを目的として配置される部材の総称である。
解舒工程100は、繊維束ボビン101と解舒ガイド102とを少なくとも含んで構成される。
本製造手法に用いられる強化繊維としては、FRPの強化繊維として一般的に用いられているガラス繊維などの無機繊維、炭素繊維やアラミド繊維などの有機繊維など、種々の強化繊維を単体または複数種の組合せで使用することが可能であるが、炭素繊維またはガラス繊維を用いることが、得られる樹脂含浸繊維束巻取体の剛性および強度を高められるため好ましい。
誘導工程200は、解舒工程100で巻き出された繊維束1を、より下流側の工程である巻付け工程300へと誘導するための誘導ガイド201を少なくとも含んで構成される。
巻付け工程300は、巻付け対象物である巻芯301と、巻芯301に対して自在に移動可能な巻付けヘッド302と、誘導工程200から送られた繊維束1を巻芯301へと誘導するための巻付けガイド303と、を少なくとも含んで構成される。
巻芯301は、製品形状や要求される機能に合わせて最適なものが選択される。例えば、中空パイプ部材の製造においては、樹脂含浸繊維束の巻付け処理後、あるいは熱硬化性樹脂使用時においては樹脂硬化工程の通過後に脱芯が可能な円筒状の巻芯や、加熱等によって溶融させることで脱芯が可能な各種形状の巻芯が使用可能である。圧力容器の製造においては、所定の収容物に対するシール性が確保された巻芯である、金属製あるいは樹脂製の各種ライナー部材を使用可能である。
樹脂付着手段401は、繊維束1に樹脂2を付着させるプロセスであるが、図1に示すように誘導工程200内、あるいは、図6に示すように巻付け工程300内(より好ましくは、巻付けヘッド302上)に備えることが可能である。図示されている含浸ローラ式による樹脂付着手段401は一例に過ぎず、他に、樹脂中に繊維束を直接通過させるディップ方式、含浸ダイに繊維束を引き込み、ダイ内部に別途計量された樹脂を吐出する定量吐出方式など、繊維束に所定量の樹脂を付着および含浸させることが目的である限りは、種々の樹脂付着手段が適用可能である。
樹脂2については液状のものが好ましく、最終製品の用途、仕様環境、製品要求特性に応じて、エポキシ樹脂や不飽和ポリエステル樹脂などの熱硬化樹脂、またはポリアミド樹脂などの熱可塑樹脂が選択されるが、特に制約があるものではない。作業性やエネルギー消費量の観点からは、エポキシ樹脂など熱硬化樹脂のほうが、樹脂温度をおおむね低い状態で含浸工程を実施できるために、作業性がよく好ましい。
また図7に例示するように、樹脂付着手段401の通過後には、樹脂の含浸(浸透)をさらに促進する目的で設置される含浸促進手段501を含んでもよい。
繊維束1の走行速度に関しては、生産効率の観点から0.1~300m/minの範囲が好ましい。走行速度が速すぎると樹脂含浸時間が確保されずに製品の品質が低下する恐れがある。また、繊維束1の走行抵抗が大きくなることや、単位時間あたりの繊維走行量が増えるため、毛羽の発生量が増えるなど、メンテナンスが追いつかずに糸切れなどのトラブルを引き起こす恐れがある。
本発明は、製造条件管理に用いる指標を、中間体における樹脂含浸繊維束層の繊維含有率Vf(%)とすることを特徴とする。繊維含有率Vf(%)の算出手段としては、中間体における繊維含有率を精度よく把握可能な手段である限り、特に制約があるものではない。例えば、X線など、樹脂含浸繊維束層内を透過・計測可能な手法等が挙げられるが、樹脂含浸繊維束層の厚みtFRP(mm)を用いて繊維含有率を算出することが、計測が比較的容易であり好ましい。
樹脂付着量が過多あるいは不足であると判断された場合、樹脂付着手段401における樹脂付着量を制御する。樹脂付着量の制御方法としては、樹脂付着手段401の方式に応じて異なるが、図示している含浸ロール方式の例においては、含浸ローラ403と掻き取り部材404との間の距離を増減することで、樹脂付着量の増減が可能である。
巻付け時の張力が、過多あるいは不足であると判断された場合、繊維束ボビン101の解舒時に付与される張力の増減や各工程内ガイド部材の構成を調節する等の手段によって制御することができる。また、別の張力調整機構(図示しない)を工程内に更に含んだ構成としてもよい。張力調整機構の種類としては特に制限があるものではなく、例えばダンサーロールや、ガイド部材の本数・高さ調節による機構など、種々の形態を選択可能である。
中間体における余剰樹脂量が過多であると判断された場合、余剰樹脂を除去するプロセスを巻付け処理に組み込むことで余剰樹脂量を制御することができる。
中間体における樹脂の絞り出し量が過多あるいは不足と判断された場合、中間体内の樹脂粘度を調整することで樹脂の絞り出し量を制御することができる。樹脂粘度の調整手段としては、樹脂粘度調整の目的が果たせる手法である限り、特に制限があるものではないが、中間体を加熱または冷却する手法が、実施が比較的容易であることから好ましい。
図8に、巻付け処理中の樹脂含浸繊維束層の厚みtFRP(mm)計測が可能な外径計測手段310をさらに含んだ、巻付け工程300の例を示す。
まず、巻付け処理における時刻t1において、図10(A)に例示するような中間体の外径d1(mm)を計測する。
背景で述べた通り、製品性能への寄与が大きいのは実際の樹脂含浸繊維束層11における繊維含有率Vf(%)であるが、先述の算出手法においては余剰樹脂層12も含まれた樹脂含浸繊維束層10における繊維含有率Vf(%)が算出される。実際の樹脂含浸繊維束層11のみの厚みを精度良く算出可能な、より好ましい構成は、図11に示すように余剰樹脂厚み計測手段320を更に含んで構成される。余剰樹脂厚み計測手段320は、図11に示されたように巻付けヘッド302上に固定された構成とする必要はなく、巻芯301の周囲に定置された構成としてもよい。余剰樹脂厚み計測手段320については、余剰樹脂層12の厚みのみ抽出することができる手段であり、製造設備の周囲にて巻付け処理中に稼動可能な手段であれば特に制限があるものではなく、超音波方式や光電方式など、種々の手段が適用可能である。
一方、接触式の計測方法については、巻尺を樹脂含浸繊維束巻取体304に巻き付けて円周長から外径を計算する方法などが挙げられるが、短時間で計測が可能な点で、挟み込み式外径計測方法が好ましい態様である。
本発明は、明細書における実施形態にのみ縛られるものではなく、同様の技術思想に基づいて定められた実施形態である限り、各種部材の選定や配置を変更して実施が可能なものである。
2:樹脂
10:樹脂含浸繊維束層
11:実際の樹脂含浸繊維束層
12:余剰樹脂層
51、52、53、54:ガイド部材の例
55:中心軸
100:解舒工程
101:繊維束ボビン
102:解舒ガイド
200:誘導工程
201:誘導ガイド
300:巻付け工程
301:巻芯
302:巻付けヘッド
303:巻付けガイド
304:樹脂含浸繊維束巻取体
310:外径計測手段
311:送光部
312:受光部
313:遮られる光線
314:遮られない光線
320:余剰樹脂層厚み計測手段
321:入射波
322:反射波
323:入射光
324:第1反射光
325:第2反射光
330:超音波厚み計
331:レーザー膜厚計
340:挟み込み式外径計測手段
341:計測ヘッド
401:樹脂付着手段
402:樹脂バス
403:含浸ローラ
404:掻き取り部材
410:含浸ガイド
501:樹脂含浸促進手段
502:含浸ガイド
F:繊維束への反力
M:繊維束の走行方向
θ:ガイド部材の中心軸と繊維束の走行方向とがなす角度
Vf:樹脂含浸繊維束層の繊維含有率
tFRP:樹脂含浸繊維束層の厚み
tr:余剰樹脂厚み
t1、t2:第1(第2)時刻
d1、d2:第1(第2)時刻における中間体の外径
Claims (6)
- ボビンから繊維束を繰り出す解舒工程と、
固定軸上で回転する巻芯に対し、巻付けヘッドが自在に移動し、繊維束を巻芯上に巻き付けることで製品を得る巻付け工程とを少なくとも有し、
前記解舒工程と前記巻付け工程との間に、前記解舒工程で繰り出された繊維束を前記巻付け工程へと誘導するガイド部材を備えた誘導工程を含む樹脂含浸繊維束巻取体の製造方法であって、
前記誘導工程または前記巻付け工程のいずれかにおいて、繊維束に樹脂を含浸させる樹脂付着操作を実施するとともに、
前記巻付け工程において、巻芯上に樹脂含浸繊維束を巻き付ける巻付け操作を実施中の中間体における樹脂含浸繊維束層の繊維含有率Vf(%)を計算する繊維含有率計算操作をさらに実施し、
前記繊維含有率Vf(%)の値に応じて、
(i)前記樹脂付着操作における樹脂付着量
(ii)前記中間体への繊維束巻付け張力
(iii)前記中間体の外表面上に生じた余剰樹脂の除去量
(iv)前記中間体上の樹脂粘度
のいずれか1つ以上を制御することを特徴とする樹脂含浸繊維束巻取体の製造方法。 - 前記中間体における前記樹脂含浸繊維束層の厚みtFRPを計算する樹脂含浸繊維束層厚み計算操作をさらに実施し、
前記厚みtFRPを用いて前記繊維含有率計算操作を実施する、請求項1に記載の樹脂含浸繊維束巻取体の製造方法。 - 前記樹脂含浸繊維束層厚み計算操作は、
前記巻付け操作を実施中の前記巻芯または前記中間体の外径を計測する外径計測操作を含み、
該外径計測操作によって計測された、第1時刻t1における前記巻芯または前記中間体の外径である第1外径d1と、前記第1時刻t1よりも後の第2時刻t2における前記中間体の外径である第2外径d2とを用いて、前記第1時刻t1から前記第2時刻t2までの間に形成された前記樹脂含浸繊維束層の厚みtFRPを計算する、請求項2に記載の樹脂含浸繊維束巻取体の製造方法。 - 前記樹脂含浸繊維束層厚み計算操作は、
前記中間体の外表面上に生じた余剰樹脂層の厚みを計測する余剰樹脂層厚み計測操作をさらに含み、
前記第1外径d1と、前記第2外径d2と、前記余剰樹脂層厚み計測操作によって計測された前記第2時刻t2における余剰樹脂層の厚みtrとを用いて、前記第1時刻t1から前記第2時刻t2までの間に形成された前記樹脂含浸繊維束層の厚みtFRPを計算する、請求項3に記載の樹脂含浸繊維束巻取体の製造方法。 - 前記余剰樹脂厚み計測操作が光電手段または超音波手段を用いて実施される、請求項4に記載の樹脂含浸繊維束巻取体の製造方法。
- 前記外径計測操作が光電手段を用いて実施される、請求項3~5のいずれかに記載の樹脂含浸繊維束巻取体の製造方法。
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EP18757411.6A EP3587086B1 (en) | 2017-02-22 | 2018-02-05 | Method for producing resin-impregnated fiber bundle wound body |
KR1020197023318A KR102377303B1 (ko) | 2017-02-22 | 2018-02-05 | 수지 함침 섬유 다발 권취체의 제조 방법 |
CN201880012516.4A CN110325352B (zh) | 2017-02-22 | 2018-02-05 | 树脂含浸纤维束卷绕体的制造方法 |
JP2018507048A JP6969538B2 (ja) | 2017-02-22 | 2018-02-05 | 樹脂含浸繊維束巻取体の製造方法 |
US16/485,960 US11046025B2 (en) | 2017-02-22 | 2018-02-05 | Method of producing resin-impregnated fiber bundle roll body |
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CN114833024B (zh) * | 2021-02-01 | 2024-01-05 | 浙江华正新材料股份有限公司 | 提高半固化片基重均匀性的方法及上胶机 |
TWI765727B (zh) * | 2021-05-28 | 2022-05-21 | 臺灣塑膠工業股份有限公司 | 預浸料之製造方法與製造設備 |
CN113320151B (zh) * | 2021-06-08 | 2023-03-03 | 广西民族大学 | 一种连续纤维增强树脂复合材料的3d打印头及打印方法 |
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JPH02231141A (ja) | 1989-03-03 | 1990-09-13 | Ishikawajima Harima Heavy Ind Co Ltd | フィラメントワインダー |
JP2004209923A (ja) * | 2003-01-08 | 2004-07-29 | Toyota Industries Corp | フィラメントワインディング装置 |
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KR101452411B1 (ko) * | 2013-03-26 | 2014-10-22 | 국립대학법인 울산과학기술대학교 산학협력단 | 브이에이알티엠에 의한 수지복합체 제조방법 및 이에 의하여 제조된 수지복합체 |
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GB2537402B (en) * | 2015-04-16 | 2018-11-21 | Lentus Composites Ltd | Composite manufacturing method and apparatus |
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JPH02231141A (ja) | 1989-03-03 | 1990-09-13 | Ishikawajima Harima Heavy Ind Co Ltd | フィラメントワインダー |
JP2004209923A (ja) * | 2003-01-08 | 2004-07-29 | Toyota Industries Corp | フィラメントワインディング装置 |
JP2007185827A (ja) * | 2006-01-12 | 2007-07-26 | Toyota Motor Corp | フィラメントワインディング装置 |
JP2009119717A (ja) | 2007-11-14 | 2009-06-04 | Murata Mach Ltd | フィラメントワインディング成形における樹脂含浸量測定方法と樹脂含浸量測定装置 |
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EP3587086A4 (en) | 2020-12-09 |
CN110325352A (zh) | 2019-10-11 |
JPWO2018155151A1 (ja) | 2019-12-12 |
KR102377303B1 (ko) | 2022-03-23 |
US11046025B2 (en) | 2021-06-29 |
KR20190113821A (ko) | 2019-10-08 |
US20200047431A1 (en) | 2020-02-13 |
EP3587086B1 (en) | 2022-07-27 |
JP6969538B2 (ja) | 2021-11-24 |
CN110325352B (zh) | 2021-07-09 |
EP3587086A1 (en) | 2020-01-01 |
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