JP2015110304A - Manufacturing method of composite container and manufacturing device of composite container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a composite container capable of improving strength of the composite container, and further to provide a manufacturing device of the composite container.SOLUTION: In a winding step, a fiber bundle 10 is wound and curable resin in a laminated fiber bundle layer 5 is simultaneously gelatinized. Accordingly, since the curable resin of the fiber bundle layer 5 of an inner peripheral side is gelatinized, the fiber bundle 10 in the fiber bundle layer 5 can be supported even when the new fiber bundle 10 is wound. Further, the curable resin in a fiber bundle layer 5B brought into contact with a fiber bundle associated with at least winding is not gelatinized and the curable resin of any fiber bundle layer 5 closer to an inner peripheral side than the fiber bundle layer 5B is gelatinized at a place where a fiber bundle 10A is newly wound. Therefore, the curable resin of the new fiber bundle 10A and the curable resin in the fiber bundle layer 5B can be fully blended, and looseness and meandering of the fiber bundle 10 due to fastening force can be suppressed in the fiber bundle layer 5 of the inner peripheral side.

Description

  The present invention relates to a composite container manufacturing method and a composite container manufacturing apparatus.

  Conventionally, as described in Patent Document 1, for example, a manufacturing method for manufacturing a composite container provided with a reinforcing layer is known. In such a manufacturing method, the fiber bundle impregnated with the thermosetting resin is wound so as to be laminated on the liner and then heated to cure the thermosetting resin of the fiber bundle.

JP 2006-300194 A

  Here, in the manufacturing method of the composite container as described above, the viscosity of the curable resin may be set low in order to improve the familiarity between the curable resins of the fiber bundle. However, when the viscosity of the curable resin is low, loosening or meandering may occur in the fiber bundle of the inner fiber bundle layer when the fiber bundle layer is wound around the fiber bundle. In addition, this may reduce the strength of the composite container.

  This invention is made | formed in order to solve such a subject, and makes it a subject to provide the manufacturing method of the composite container which can improve the intensity | strength of a composite container, and the manufacturing apparatus of a composite container.

  In order to solve the above-mentioned problem, a method for manufacturing a composite container according to the present invention is a method for manufacturing a composite container having a reinforcing layer, in which a fiber bundle impregnated with a curable resin is wound around the outer peripheral side of a liner. In addition to forming a fiber bundle layer, a winding step of laminating a plurality of the fiber bundle layers is provided. In the winding step, the curable resin in the laminated fiber bundle layer is gelled simultaneously with the winding of the fiber bundle. In the place where the fiber bundle is newly wound, at least the curable resin in the first fiber bundle layer in contact with the fiber bundle related to winding is not gelled, and the inner periphery side of the first fiber bundle layer is not gelled. The curable resin in any fiber bundle layer is gelled.

  In the method for manufacturing a composite container according to the present invention, in the winding step, the curable resin in the laminated fiber bundle layer is gelled simultaneously with the winding of the fiber bundle. Therefore, even when a new fiber bundle is wound, since the curable resin of the inner fiber bundle layer is gelled, the fiber bundle in the fiber bundle layer can be supported by the gelled curable resin. . Further, at a location where the fiber bundle is newly wound, at least the curable resin in the first fiber bundle layer that comes into contact with the fiber bundle related to winding is not gelled, and the inner peripheral side of the first fiber bundle layer is not formed. The curable resin in any of the fiber bundle layers is gelled. Accordingly, the curable resin of the new fiber bundle and the curable resin in the first fiber bundle layer can be sufficiently blended, while the tightening force is applied to the fiber bundle layer on the inner peripheral side from the first fiber bundle layer. It is possible to suppress loosening and meandering of the fiber bundle. As described above, the strength of the composite container can be improved.

  Moreover, in the manufacturing method of the composite container according to the present invention, in the winding step, a single pattern layer is formed by laminating a plurality of fiber bundle layers in which the fiber bundle is wound in a predetermined winding pattern, and the plurality of pattern layers are formed. When one pattern layer is formed by laminating, the curable resin in any fiber bundle layer in the same pattern layer may be gelled. As described above, by rapidly gelling the curable resin in the already laminated fiber bundle layer, loosening and meandering of the fiber bundle due to the tightening force can be further suppressed.

  In the method for producing a composite container according to the present invention, in the winding step, by adjusting the relationship between the time required for winding the fiber bundle and the time required for gelation of the curable resin, simultaneously with the winding of the fiber bundle. The curable resin in the laminated fiber bundle layer may be gelled. For example, the fiber bundle as described above can be wound by adjusting the time required for winding with respect to the time required for gelation of the curable resin. Alternatively, for example, by adjusting the time required for gelation by selecting a curable resin with respect to the time required for winding, the fiber bundle as described above can be wound.

  Moreover, in the manufacturing method of the composite container which concerns on this invention, the fiber bundle wound around a liner may be supplied from a fiber bundle supply part at a winding process, and a fiber bundle may be cooled by a cooling means in a fiber bundle supply part. The curable resin of the fiber bundle before being supplied in the fiber bundle supply unit is cooled by the cooling means, thereby suppressing an increase in viscosity. Therefore, the timing at which the viscosity of the curable resin starts to increase toward gelation can be adjusted.

  Moreover, in the manufacturing method of the composite container according to the present invention, in the winding step, the time required for gelation of the curable resin is adjusted by cooling the bobbin around which the fiber bundle is wound in the fiber bundle supply unit by the cooling means. You can do it. By such cooling, the time required for gelation of the curable resin can be easily adjusted to be long.

  Moreover, in the manufacturing method of the composite container which concerns on this invention, you may adjust the time required for gelatinization of curable resin by heating a fiber bundle at a winding process. By such heating, the time required for gelation of the curable resin can be easily adjusted.

  The composite container manufacturing apparatus according to the present invention is a composite container manufacturing apparatus having a reinforcing layer, and forms a fiber bundle layer by winding a fiber bundle impregnated with a curable resin around the outer periphery of a liner. And a winding unit for laminating a plurality of the fiber bundle layers, and a fiber bundle supply unit for supplying a fiber bundle to be wound around the liner, the fiber bundle supply unit is provided with a cooling means for cooling the fiber bundle, The winding portion gels the curable resin in the laminated fiber bundle layer simultaneously with the winding of the fiber bundle.

  In the composite container manufacturing apparatus according to the present invention, the winding portion gels the curable resin in the laminated fiber bundle layer simultaneously with the winding of the fiber bundle. Therefore, even when a new fiber bundle is wound, since the curable resin of the inner fiber bundle layer is gelled, the fiber bundle in the fiber bundle layer can be supported by the gelled curable resin. . Therefore, loosening and meandering of the fiber bundle due to the tightening force can be suppressed. The curable resin of the fiber bundle before being supplied in the fiber bundle supply unit is cooled by the cooling means, thereby suppressing an increase in viscosity. Therefore, the timing at which the viscosity of the curable resin starts to increase toward gelation can be adjusted, and the curable resin in the fiber bundle layer can be gelled more reliably. As described above, the strength of the composite container can be improved.

  According to the present invention, the strength of the composite container can be improved.

It is a partial cross section figure which shows the composite container which concerns on embodiment. It is a conceptual diagram for demonstrating a helical layer and a hoop layer. It is a typical conceptual diagram which shows the manufacturing apparatus of the composite container which concerns on embodiment. It is a typical conceptual diagram which shows the mode of gelatinization. It is a typical conceptual diagram which shows the mode of gelatinization. It is a graph which shows notionally the relation between time and the viscosity of curable resin. It is a typical conceptual diagram which shows the manufacturing apparatus of the composite container which concerns on a modification.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a partial cross-sectional view illustrating a composite container manufactured by a manufacturing method and a manufacturing apparatus according to an embodiment. As shown in FIG. 1, the composite container 1 is a container for storing fuel gas such as hydrogen or natural gas at a high pressure. For example, the composite container 1 has a total length of 2 to 4 m and a diameter of about 400 to 600 mm, and can withstand a pressure of about 20 to 90 MPa when used. The use of the composite container 1 is not limited and can be used for various purposes. In addition, the composite container 1 may be used as a stationary type or may be used by being mounted on a moving body.

  The composite container 1 includes a cylindrical liner 2 and a reinforcing layer 3 provided so as to cover the outer surface side (outer peripheral surface side) of the liner 2. Both end portions 2a of the liner 2 are formed in a dome shape, and a base 4 is attached to the tips of the both end portions 2a. Here, the mounting height (projection height) of the base 4 is equal to the thickness of the reinforcing layer 3, but it may be more than that, or even if the base 4 protrudes from the reinforcing layer 3. Good.

  The material of the liner 2 is not particularly limited, but resin or metal is selected depending on the application. Examples of the resin liner 2 include a resin obtained by shaping a thermoplastic resin such as high-density polyethylene into a container shape by rotational molding or blow molding and a metal base 4. As the metal liner 2, for example, a pipe shape or plate shape made of an aluminum alloy, steel, or the like is formed into a container shape by spinning or the like, and the shape of the base 4 is formed.

  The reinforcing layer 3 is formed by winding a fiber bundle 10 impregnated with a curable resin so as to be laminated on the outer surface side of the liner 2, performing a predetermined treatment, and then laminating the fiber bundle 10. Layer 5 (see FIGS. 4 and 5) is formed by heating and curing. The fiber bundle layer 5 is formed by winding the fiber bundle 10 around the outer peripheral side of the liner 2, and the reinforcing layer 3 is formed by laminating a plurality of the fiber bundle layers 5. In addition, a single pattern layer 30 is formed by laminating a plurality of fiber bundle layers 5 wound with fiber bundles 10 in a predetermined winding pattern, and a reinforcing layer 3 is formed by laminating a plurality of the pattern layers 30. The As the pattern layer 30, a hoop layer 31 and a helical layer 32 are formed. The hoop layers 31 and the helical layers 32 are alternately formed.

  Further, as the fiber bundle 10, for example, carbon fiber, glass fiber, aramid fiber, boron fiber, polyethylene fiber, steel fiber, Zylon fiber, or vinylon fiber can be used. Lightweight carbon fiber is used. In addition, the number of fibers (filament) of the fiber bundle 10 of the present embodiment is not particularly limited, but is in the range of 1000 to 50000 filaments, preferably 3000 to 30000 filaments, and here, 24,000 filaments. Yes.

  As shown in FIG. 2A, the hoop layer 31 is a layer formed by winding the fiber bundle 10 around the liner 2 in the circumferential direction. At this time, the fibers of the hoop layer 31 are wound so as to be substantially perpendicular to the axis CL of the liner 2 when viewed from the radial direction of the liner 2. When forming the hoop layer 31, the fiber bundle layer 5 is formed by covering the outer peripheral surface of the container (or the helical layer 32) with the fiber bundle 10, and then the fiber bundle 10 is wound around the fiber bundle layer 5. Layer 5 is formed. The hoop layer 31 is formed by forming a plurality of such fiber bundle layers 5. The number of fiber bundle layers 5 in the hoop layer 31 is set to about 1 to 10. The hoop layer 31 mainly has a function of supporting the liner 2 in the radial direction.

  As shown in FIG. 2B, the helical layer 32 is a layer formed by winding the fiber bundle 10 so as to surround the liner 2 in the circumferential direction while being inclined. At this time, the fibers of the helical layer 32 are wound so as to be inclined with respect to the axis CL of the liner 2 when viewed from the radial direction of the liner 2. The inclination angle with respect to the axis CL is set to about 10 to 80 °. In the helical layer 32, the fiber bundle 10 is wound in a brush shape from one dome-shaped end 2a of the liner 2 to the other dome-shaped end 2a. When forming the helical layer 32, the fiber bundle layer 5 is formed by covering the outer peripheral surface of the container (or the hoop layer 31) with the fiber bundle 10, and then the fiber bundle 10 is formed on the fiber bundle layer 5. Further, the fiber bundle layer 5 is formed by winding. A helical layer 32 is formed by forming a plurality of such fiber bundle layers 5. The number of fiber bundle layers 5 in the helical layer 32 is set to about 2 to 20. The helical layer 32 mainly has a function of supporting the liner 2 in the axial direction.

  Next, the manufacturing method which manufactures the composite container 1 comprised as mentioned above is demonstrated.

  First, the fiber bundle 10 is wound around the outer periphery of the liner 2 to form one fiber bundle layer 5, and a plurality of the fiber bundle layers 5 are stacked, whereby a winding step for forming a container intermediate is performed. .

  In addition, the container intermediate is intended for the composite container 1 in the manufacturing process, and here is intended to be in a state before the curable resin of the fiber bundle 10 is thermally cured (hereinafter the same). Moreover, the thing in the middle of winding which has not finished winding all the fiber bundles 10 may be called a container intermediate body. Further, the winding method in the winding step is not particularly limited, but for example, an FW (filament winding) method can be adopted.

  Here, with reference to FIG. 3, the example of the said winding process in this embodiment is explained in full detail.

  FIG. 3 is a schematic conceptual diagram of a manufacturing apparatus 100 used in a so-called Dry method in which a winding process is performed using a fiber bundle (tow prepreg) impregnated with a curable resin in advance. Here, the “toe prepreg” is a fiber bundle in which a resin is impregnated.

  As shown in FIG. 3, the manufacturing apparatus 100 of this embodiment manufactures the said composite container 1, Comprising: It is used at the said winding process. The manufacturing apparatus 100 includes a plurality of bobbins 101 around which a fiber bundle 10 pre-impregnated with a curable resin is wound. Furthermore, the manufacturing apparatus 100 includes a wound bundle passing position adjusting unit 102 that adjusts the passing position of the plurality of fiber bundles 10 to be wound, and a moving unit that moves the plurality of wound fiber bundles 10 along the axial direction of the liner 2. 103 and a rotation mechanism (not shown) that rotates the liner 2 so that the fiber bundle 10 is wound up by the liner 2. Among these, the bobbin 101, the wound bundle passage position adjusting unit 102, and the moving unit 103 are configured as a fiber bundle supply unit 150 that supplies the fiber bundle 10 to be wound around the liner 2. In addition, the mechanism for disposing the liner 2 and the rotation mechanism form a single fiber bundle layer 5 by winding the fiber bundle 10 around the outer periphery of the liner 2, and a winding unit 160 that stacks a plurality of the fiber bundle layers 5. Composed. In the manufacturing method by the manufacturing apparatus 100, the fiber bundle 10 is supplied from the bobbin 101, and the fiber bundle 10 is rotated and rotated by the winding bundle passing position adjusting unit 102 while the bundle passing position at the time of winding is adjusted. The fiber bundle layer 5 is formed so as to cover the liner 2 by being wound around the outer surface side of the liner 2 by the cooperation of the mechanism.

  In the winding step, one pattern layer 30 is formed by laminating a plurality of fiber bundle layers 5 each having a fiber bundle 10 wound in a predetermined winding pattern, and a plurality of the pattern layers 30 are laminated. The fiber bundle layer 5 is a layer of the fiber bundle 10 formed by a single winding pattern among the winding patterns repeatedly executed to form the pattern layer 30, and is a container intermediate (or liner 2). ) Of the fiber bundle 10 covering substantially the entire outer peripheral surface. Specifically, one hoop layer 31 is formed by laminating a plurality of fiber bundle layers 5 in which the fiber bundles 10 are wound in the winding pattern of the hoop layer 31. When forming the hoop layer 31, as shown in FIG. 3, the winding of the fiber bundle 10 is started from one end 2 a of the liner 2, and the moving unit 103 is moved toward the direction D <b> 1 while the fiber bundle 10 is wound around the liner 2. The winding is performed gradually until the other end 2b of the liner 2 is reached. Thereby, the one fiber bundle layer 5 which covers the substantially whole region of the outer peripheral surface of a container intermediate body (or liner 2) is formed. Next, the direction of the moving part 103 is changed, the winding of the fiber bundle 10 is started from the other end 2b of the liner 2, and the moving part 103 is gradually moved in the direction D2 while winding the fiber bundle 10 around the liner 2. And winding is performed until one end 2a of the liner 2 is reached. Thereby, the one fiber bundle layer 5 which covers the substantially whole region of the outer peripheral surface of a container intermediate body (or liner 2) is formed. By repeating the pattern, a plurality of fiber bundle layers 5 are formed, and one hoop layer 31 is formed. In the case of the hoop layer 31, depending on the size of the composite container 1, it takes about 5 to 20 minutes to form one fiber bundle layer 5. The time for forming one hoop layer 31 is determined by the number of fiber bundle layers 5. When forming the helical layer 32, the fiber bundle 10 is wound around the liner 2 obliquely by moving the moving unit 103. The moving unit 103 is moved so that such an oblique winding is gradually performed from the one end 2a side of the liner 2 toward the other end 2b side. Next, the moving unit 103 is moved so that the oblique winding is gradually performed from the other end 2b side of the liner 2 toward the one end 2a side. Thereby, the one fiber bundle layer 5 which covers the substantially whole region of the outer peripheral surface of a container intermediate body (or liner 2) is formed. By repeating the pattern, a plurality of fiber bundle layers 5 are formed, and one helical layer 32 is formed. In the case of the helical layer 32, although it depends on the size of the composite container 1, it takes about 10 to 30 minutes to form one fiber bundle layer 5. The time for forming one helical layer 32 is determined by the number of fiber bundle layers 5. In addition, when the process of forming one hoop layer 31 (or helical layer 32) is completed and the process proceeds to the process of forming the helical layer 32 (or hoop layer 31), operations such as cutting and adjustment of the fiber bundle 10 are performed. Is called.

  In the present embodiment, in the winding step, the curable resin in the laminated fiber bundle layer 5 is gelled simultaneously with the winding of the fiber bundle 10. 4 and 5, the fiber bundle layer 5 in the process of formation is referred to as a fiber bundle layer 5 </ b> A, and a fiber bundle 10 </ b> A related to winding (here, a fiber bundle related to winding is distinguished from the fiber bundle 10 already wound). 10A), that is, the fiber bundle layer 5 adjacent to the fiber bundle layer 5A on the inner peripheral side is referred to as a fiber bundle layer (first fiber bundle layer) 5B, and the fiber bundle layer 5B The fiber bundle layer 5 adjacent on the inner peripheral side is defined as a fiber bundle layer 5C. 4 and 5, the fiber bundle layers 5A, 5B, and 5C and the fiber bundle 10 that constitutes the layer are shown, but the fiber bundle layer 5 on the inner peripheral side of the fiber bundle layer 5C is illustrated. Is omitted. Moreover, in FIG.4 and FIG.5, the gray scale is attached | subjected and shown to the part which curable resin gelatinized.

  Here, “gelling the curable resin in the fiber bundle layer” means bringing the curable resin into a gelled state. For example, as shown in FIG. 6, when the horizontal axis is time and the vertical axis is viscosity, the viscosity of the curable resin increases with time under a predetermined temperature condition. Then, when the viscosity reaches a predetermined value (here, the threshold value TL1), the curable resin is in a “gelled” state in which the fluidity is lost. For the following description, a region having a viscosity lower than the threshold value TL1 is referred to as “gelation progress region E1”, which is a region in which the viscosity increases toward gelation. Moreover, let the area | region whose viscosity is more than threshold value TL1 be the "gelation completion area | region E2" where gelation was completed. In the example shown in FIG. 6, reaching the threshold TL1 to the viscosity of the curable resin in the fiber bundle layer 5 corresponds to “gelling the curable resin in the fiber bundle layer”. Therefore, the state in which the viscosity of the curable resin in the fiber bundle layer 5 is rising in the gelation progress region E1 does not correspond to the state of “gelling the curable resin in the fiber bundle layer”. In addition, threshold value TL1 which shows that curable resin gelatinized can be set to the viscosity etc. when a storage elastic modulus and a loss elastic modulus correspond. Therefore, gelling of the curable resin in the laminated fiber bundle layer 5 at the same time as winding of the fiber bundle 10 means that the fiber bundle 10 already formed at the same time that the fiber bundle 10 is wound. In any of the layers 5, the viscosity of the curable resin reaches the threshold value TL1 and gels.

  As shown in FIGS. 4 and 5, at a place where the fiber bundle 10 </ b> A is newly wound, the curable resin in the fiber bundle layer (first fiber bundle layer) 5 </ b> B that contacts at least the fiber bundle 10 </ b> A related to the winding is gelled. And the curable resin in one of the fiber bundle layers 5 on the inner peripheral side of the fiber bundle layer 5B is gelled. For example, in the example shown in FIG. 4 (a), the fiber bundle layer 5B around which the fiber bundle 10A is wound is not gelated at the place where the new fiber bundle 10A is wound, and the fiber bundle layer 5C on the one-stage inner periphery side and Each fiber bundle layer 5 on the inner peripheral side is gelled.

  In the example shown in FIG. 4B, when one pattern layer 30B (here, the pattern layer being formed is assumed to be 30B to be distinguished from the already formed pattern layer 30), the same pattern layer 30B is formed. The curable resin in any one of the fiber bundle layers 5 in the pattern layer 30B is gelled. That is, in the newly formed pattern layer 30 </ b> B, when the fiber bundle 10 </ b> A is newly wound, the curable resin in any part of the inner-side fiber bundle layer 5 that has already been formed is gelled. . In this case, when the outermost fiber bundle layer 5 of the pattern layer 30B is formed, at least the innermost fiber bundle layer 5 of the pattern layer 30B may be gelled. As described above, the curable resin in the already laminated fiber bundle layer 5 is rapidly gelled, whereby loosening and meandering of the fiber bundle 10 due to the tightening force can be further suppressed.

  In the example shown in FIG. 5A, when one pattern layer 30B is formed, the curable resin in the fiber bundle layer 5 in the other pattern layer 30 on the inner peripheral side is gelled. For example, the pattern layer 30 </ b> B being formed is the outermost outermost pattern layer 30 in the composite container 1, and the fiber bundle layer 5 </ b> A is the outermost fiber bundle layer 5 in the outermost pattern layer 30. In this case, when the circumferential dimension between the outer peripheral surface of the liner 2 and the fiber bundle layer 5A is R1, and the circumferential dimension of the gelled portion is R2, the dimension R2 is 30% of the dimension R1. It may be more than 50% or more. By setting it as the said range, the looseness of the fiber bundle layer 5 of an inner peripheral side can be suppressed effectively. However, the present invention is not limited to such a numerical range, and it is sufficient that the curable resin is gelled in any of the fiber bundle layers 5 at least at any time when the fiber bundle 10A is wound. For example, as shown in FIG. 5B, when the fiber bundle layer 5A is the outermost fiber bundle layer 5 in the outermost pattern layer 30, the innermost pattern layer 30A (on the liner 2). It is only necessary that a part of the fiber bundle layer 5 (at least the fiber bundle layer 5 in contact with the innermost liner 2) of the contacted pattern layer) is gelled.

  As described above, in the winding step, gelation of the curable resin in the laminated fiber bundle layer 5 simultaneously with the winding of the fiber bundle 10 is a gelation time until gelation as a curable resin. Is possible by using a short curable resin. That is, when the fiber bundle 10 is wound around the liner 2 by taking into consideration the relationship between the winding time, other work time, and the like, and the gelling time, gelation can be performed in the laminated fiber bundle 10. A curable resin is used. The gelation time is the time required for the viscosity to reach the threshold value TL1 from the time when the increase in the viscosity of the curable resin is started, as shown in FIG. 6 (indicated by t1 in FIG. 6). ) Although not particularly limited, a curable resin having a gelation time of 20 to 600 minutes under normal temperature (20 to 25 ° C.) conditions may be applied. As a method for measuring the gelation time, dynamic viscoelasticity measurement can be used. In order to perform such a measurement, for example, an ARES rheometer (manufactured by TA Instruments) can be used. The time from the start of the increase in viscosity until the storage elastic modulus and the loss elastic modulus coincide can be obtained as the gelation time.

  As the type of curable resin, phenol resin, urea resin, unsaturated polyester resin, vinyl ester resin, polyimide resin, bismaleimide resin, polyimide resin, polyurethane resin, diallyl phthalate resin, epoxy resin, or the like may be used. As the molecular structure of the curable resin, for example, in the case of epoxy resin, bisphenol A type epoxy resin, bisphenol AD type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, etc. are adopted. You can do it. Examples of the curing agent added to the curable resin include aliphatic amines such as ethylenediamine, aliphatic polyamines such as diethylenetriamine, aromatic amines such as metaphenylenediamine or diaminodiphenylsulfone, piperidine, diazapicycloundecene, and the like. An acid anhydride curing agent such as primary amine, tertiary amine, and methyltetrahydrophthalic anhydride may be employed.

  As shown in FIGS. 4 and 5, the fiber bundle layer 5 on the outer peripheral side does not gel the curable resin, and the fiber bundle layer 5 on the inner peripheral side gels the curable resin. This can be achieved by adjusting the timing of the start of gelation of the curable resin in the fiber bundle layer 5 on the side and the timing of the start of gelation of the curable resin in the fiber bundle layer 5 on the inner peripheral side. The timing for starting the gelation is the timing when the viscosity of the curable resin starts to increase toward gelation, and is the timing corresponding to “0” in FIG. 6. As described above, since a curable resin having a gelation time set in advance is used, the curable resin of the inner peripheral side fiber bundle layer 5 wound around the liner 2 first is cured of the outer peripheral side fiber bundle layer 5. The timing of the start of gelation is made earlier than the functional resin.

  The method for adjusting the timing of starting the gelation of the curable resin is not particularly limited, and any method can be adopted. For example, in the manufacturing apparatus 100, when the temperature condition in the fiber bundle supply unit 150 is normal temperature and the temperature condition in the winding unit 160 is also normal temperature, the following method may be employed. That is, in the stage before being set in the fiber bundle supply unit 150, the bobbin 101 is stored in a low-temperature environment such as a refrigerator, and is taken out from the refrigerator or the like when setting. The time when the bobbin 101 becomes room temperature after taking out and the viscosity of the curable resin impregnated starts to rise is the timing for starting the gelation of the curable resin. Here, a plurality of sets of bobbins 101 are used to form one (or a plurality of) pattern layers 30. That is, as shown in FIG. 3, when a set of a plurality of bobbins 101 is set on the fiber bundle supply unit 150 and winding is started, the fiber bundle 10 of each bobbin 101 is lost, and the next set of bobbins 101 is set. . One pattern layer 30 is formed by performing such replacement of the bobbin 101 a plurality of times. Therefore, the curable resin in the fiber bundle layer 5 (that is, the fiber bundle layer 5 on the inner peripheral side) formed by the fiber bundle 10 of the bobbin 101 used at an earlier stage than the set of the bobbins 101 in use is quickly released. It can be gelled.

  Moreover, you may adjust the timing of a gelatinization progress start by cooling the fiber bundle 10 supplied with the fiber bundle supply part 150 with a cooling means. For example, as shown in FIG. 3, the arrangement portion of the bobbin 101 in the fiber bundle supply unit 150 may be a cooling region 170. For example, a refrigerator having a mechanism capable of supplying the fiber bundle 10 to the outside may be used, and the inside of the refrigerator may be the cooling region 170. In the state of being arranged in the cooling region 170, the viscosity of the curable resin in the fiber bundle 10 does not increase, and when the fiber bundle 10 is pulled out from the bobbin 101 and goes out of the cooling region 170 (outside) When the temperature of the curable resin rises to a predetermined temperature), the timing for starting the gelation of the curable resin starts. Therefore, since the inner fiber bundle layer 5 is formed by the fiber bundle 10 that goes out of the cooling region 170 and is wound around the liner 2 at an early stage, the gel bundle is faster than the outer fiber bundle layer 5. It can be made. The fiber bundle 10 may be cooled to −25 to 10 ° C. by a cooling means. As described above, the curable resin of the fiber bundle 10 before being supplied in the fiber bundle supply unit 150 is cooled by the cooling unit, thereby suppressing an increase in viscosity. Therefore, the timing at which the viscosity of the curable resin starts to increase toward gelation can be adjusted.

  Further, as the curable resin impregnated in the fiber bundle 10, the viscosity does not increase at room temperature (or increases slowly even if it increases), and the gelation time under a predetermined temperature condition higher than room temperature is short In addition, the timing of the start of gelation may be adjusted by providing a heating means (not shown) in the winding part 160. That is, in the fiber bundle supply unit 150, the viscosity of the curable resin in the fiber bundle 10 does not increase, and the curable resin is wound around the liner 2 by the winding unit 160 and the curable resin reaches a predetermined temperature. This is the timing for starting the gelation of the resin. Therefore, since the fiber bundle layer 5 on the inner peripheral side is formed by the fiber bundle 10 having a high temperature at the winding portion 160 at an early stage, it can be gelled earlier than the fiber bundle layer 5 on the outer peripheral side. . As a heating unit, a mechanism that allows warm air to pass inside the liner 2 or a mechanism that supplies heat from the outer peripheral side of the liner 2 may be employed. You may heat the curable resin of the fiber bundle 10 to 40-60 degreeC with a heating means. In addition, while providing a heating means in the winding part 160 side, you may provide the above cooling means in the fiber bundle supply part 150. FIG.

  Next, the manufacturing method of the composite container 1 according to the present embodiment and the operation and effect of the manufacturing apparatus 100 will be described.

  First, in the composite container manufacturing method, the viscosity of the curable resin may be set low in order to improve the familiarity between the curable resins of the fiber bundle. However, in the conventional manufacturing method, when the viscosity of the curable resin is low, when the fiber bundle layer is laminated by winding the fiber bundle, the fiber bundle of the inner peripheral side fiber bundle layer is affected by the tightening force. Looseness and meandering may occur. Thereby, the intensity | strength of the composite container may fall.

  On the other hand, in the manufacturing method of the composite container 1 according to the present embodiment, the curable resin in the laminated fiber bundle layer 5 is gelled simultaneously with the winding of the fiber bundle 10 in the winding step. Therefore, even when a new fiber bundle 10A is wound, the curable resin of the inner fiber bundle layer 5 is gelled, so the fiber bundle 10 in the fiber bundle layer 5 is supported by the gelled curable resin. can do. Further, at a position where the fiber bundle 10A is newly wound, at least the curable resin in the fiber bundle layer 5B that comes into contact with the fiber bundle related to the winding is not gelled, and any of the inner peripheral side of the fiber bundle layer 5B The curable resin in the fiber bundle layer 5 is gelled. Accordingly, the curable resin of the new fiber bundle 10A and the curable resin in the fiber bundle layer 5B can be sufficiently mixed, while the fiber bundle layer 5 on the inner peripheral side of the fiber bundle layer 5B has a tightening force. It is possible to suppress loosening and meandering of the fiber bundle 10 due to. As described above, the strength of the composite container 1 can be improved.

  In the composite container manufacturing apparatus 100 according to the present embodiment, the winding unit 160 gels the curable resin in the laminated fiber bundle layer 5 simultaneously with the winding of the fiber bundle 10. Therefore, even when a new fiber bundle 10A is wound, the curable resin of the inner fiber bundle layer 5 is gelled, so the fiber bundle 10 in the fiber bundle layer 5 is supported by the gelled curable resin. can do. Therefore, loosening and meandering of the fiber bundle 10 due to the tightening force can be suppressed. The curable resin of the fiber bundle 10 before being supplied in the fiber bundle supply unit 150 is cooled by the cooling means, so that an increase in viscosity is suppressed. Therefore, it is possible to adjust the timing of the start of the gelation progress in which the viscosity of the curable resin starts to increase toward gelation, and the curable resin in the fiber bundle layer 5 can be gelled more reliably. As described above, the strength of the composite container 1 can be improved.

  In the method for manufacturing a composite container according to the present embodiment, in the winding step, the fiber bundle 10 is wound by adjusting the relationship between the time required for winding the fiber bundle 10 and the time required for gelling the curable resin. Simultaneously with the application, the curable resin in the laminated fiber bundle layer 5 is gelled. For example, by controlling the time required for winding the fiber bundle 10 with respect to the time required for gelling the curable resin, the manufacturing time corresponding to the time required for the curable resin to be used to gel is controlled. It becomes possible. Alternatively, the time required for gelation may be adjusted by selecting a curable resin in view of the time required for winding the fiber bundle 10. In this way, by adjusting the relationship between the time required for winding and the time required for gelation of the curable resin, at a position where the fiber bundle 10A is newly wound, at least the fiber bundle that comes into contact with the fiber bundle related to winding The curable resin in the layer 5B is not gelled, and the curable resin in any one of the fiber bundle layers 5 on the inner peripheral side of the fiber bundle layer 5B can be gelled. Further, when the gelation of the curable resin is fast and it is difficult to perform the gelation as described above only by controlling the time required for winding, the fiber bundle 10 is wound in the fiber bundle supply unit 250. You may adjust the time required for gelatinization of curable resin by cooling the bobbin 101 with a cooling means. The method for cooling the bobbin 101 is not limited to the Dry method using a tow prepreg, and may be applied to the Wet method using a resin bath. However, when the bobbin 101 is cooled in the wet method, it is preferable to cool the resin bath together. In addition, when the gelation of the curable resin is slow and it is difficult to perform the above gelation only by controlling the time required for winding, the gelation of the curable resin can be performed by heating the fiber bundle 10. You may adjust the time which takes. By these, it becomes possible to adjust easily the time required for gelatinization of curable resin.

  In addition, as a manufacturing method according to the comparative example, for example, when one pattern layer 30 is formed, the winding portion 160 is stopped, and the curable resin is gelled by standing at room temperature or heating, and then the next pattern layer A method of starting the winding unit 160 to form 30 is mentioned. In such a manufacturing method, manufacturing time becomes long compared with the manufacturing method which concerns on this embodiment which makes curable resin gelatinize simultaneously with winding.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments. The present invention is modified without departing from the scope described in the claims or applied to others. It may be.

  For example, in the above-described embodiment, the winding process is performed by the Dry method using a toe prepreg, but may be performed by the Wet method using a resin bath. FIG. 7 is a schematic conceptual diagram of a composite container manufacturing apparatus 200 according to a modification. The manufacturing apparatus 200 is used in a resin bath method among so-called wet methods in which a fiber bundle is supplied while impregnated with a curable resin to perform a winding step. As illustrated in FIG. 7, the manufacturing apparatus 200 includes a fiber bundle supply unit 250 that supplies the fiber bundle 10 and a winding unit 260 that winds the fiber bundle 10. The fiber bundle supply unit 250 of the manufacturing apparatus 200 includes a plurality of bobbins 101 wound with fiber bundles as raw yarns before impregnated with the curable resin 202, a resin bath 203 containing the curable resin 202, and the resin bath 203 , A rotating roll 204 that impregnates the fiber bundle with a curable resin, a resin content adjusting roll 206 that adjusts the resin content, and a moving unit 207. In the manufacturing method using the manufacturing apparatus 200, fiber bundles as raw yarns are supplied from the bobbin 101, the fiber bundles are guided into the resin bath 203, and a rotating roll 204 provided rotatably in the resin bus 203. The resin is impregnated with the curable resin 202 while being guided around its periphery. Thereafter, the excess curable resin 202 is squeezed out by the resin content adjusting roll 206, the resin content is adjusted, supplied to the subsequent stage as the fiber bundle 10, and wound around the liner 2. The fiber bundle supply unit 250 of the manufacturing apparatus 200 is provided with cooling means for cooling the fiber bundle 10. Specifically, a chiller 270 attached to the resin bus 203 or the like is employed as the cooling means. As described above, the curable resin of the fiber bundle 10 before being supplied by the fiber bundle supply unit 250 is cooled by the cooling unit, whereby the increase in viscosity is suppressed. Therefore, the timing at which the viscosity of the curable resin starts to increase toward gelation can be adjusted. Note that, in the case of a manufacturing method based on the Wet method using a resin bath, the method for adjusting the start timing of the gelation progress is not limited to the method using the cooling means. For example, the curable resin to be put in the resin bath 203 is stored in a refrigerator or the like, and a new curable resin is taken out from the refrigerator and added to the resin bath 203 while one pattern layer 30 (or a plurality of pattern layers 30) is formed. By doing so, you may adjust the timing of the gelatinization progress start of each fiber bundle layer. Moreover, you may adjust the timing of a gelatinization progress start by heating by the winding part 260 side as demonstrated by the above-mentioned Dry method.

  Examples will be described below. However, the present invention is not limited to these examples.

[Comparative example]
As the curable resin impregnated into the fiber bundle, one having a gelation time of 10,000 minutes or more was used. In addition, the dynamic viscoelasticity measurement was used as a measuring method of gelation time. In order to perform such measurement, an ARES rheometer (manufactured by TA Instruments) was used. Specifically, an epoxy resin was employed as the type of curable resin, a bisphenol A type epoxy was employed as the molecular structure of the curable resin, and an amine compound was employed as a curing agent added to the curable resin. Moreover, the fiber bundle was wound by the Dry method using a tow prepreg. Both the fiber bundle supply unit and the winding unit were at room temperature. Using a liner having a total length of 1500 mm and a diameter of 350 mm, the number of pattern layers (having helical layers and hoop layers alternately provided) is 100, and the number of fiber bundle layers in one helical layer is 2 to 8, The number of fiber bundle layers in one hoop layer was 1-6. It took about 10 to 20 minutes to form one pattern layer in consideration of replacement of bobbins and replacement of fiber bundles. In this case, at the time of forming the outermost fiber bundle layer in the outermost pattern layer, the curable resin in any of the inner fiber bundle layers was not gelled.
[Example]
As the curable resin impregnated into the fiber bundle, one having a gelation time of 410 minutes was used. Specifically, an epoxy resin was employed as the type of curable resin, a bisphenol A type epoxy was employed as the molecular structure of the curable resin, and an amine compound was employed as a curing agent added to the curable resin. Moreover, the fiber bundle was wound by the Dry method using a tow prepreg. Both the fiber bundle supply unit and the winding unit were at room temperature. The liner size, the number of pattern layers, and the like were the same as in the comparative example. In this case, at the time of forming the outermost fiber bundle layer in the outermost pattern layer, the curable resin in the inner half fiber bundle layer was gelled.

[Evaluation results]
A burst test was performed on the composite container manufactured by the manufacturing method according to the comparative example and the example. The burst test was performed by a hydraulic fracture test, and the strength expression rate relative to the design strength was calculated to evaluate the strength. When the relative strength value of the composite container according to the test example was 100, the relative strength value of the composite container according to the comparative example was 97. From this, it is understood that the composite container according to the example has higher strength.

DESCRIPTION OF SYMBOLS 1 ... Composite container, 2 ... Liner, 3 ... Reinforcement layer, 5 ... Fiber bundle layer, 10 ... Fiber bundle, 30 ... Pattern layer, 31 ... Hoop layer, 32 ... Helical layer, 100, 200 ... Manufacturing apparatus, 150, 250 ... fiber bundle supply unit, 160, 260 ... winding part, 170 ... cooling region (cooling means), 270 ... chiller (cooling means).

Claims (7)

A method of manufacturing a composite container having a reinforcing layer,
A fiber bundle layer is formed by winding a fiber bundle impregnated with a curable resin around the outer periphery of the liner, and a winding step of laminating a plurality of the fiber bundle layers is provided,
In the winding step, simultaneously with the winding of the fiber bundle, the curable resin in the laminated fiber bundle layer is gelled,
In the place where the fiber bundle is newly wound,
The curable resin in the first fiber bundle layer in contact with at least the fiber bundle related to the winding is not gelled, and in any one of the fiber bundle layers on the inner peripheral side of the first fiber bundle layer A method for producing a composite container, wherein the curable resin is gelled. In the winding step, one pattern layer is formed by laminating a plurality of the fiber bundle layers around which the fiber bundle is wound in a predetermined winding pattern, and a plurality of the pattern layers are laminated,
The method for producing a composite container according to claim 1, wherein when one pattern layer is formed, the curable resin in any one of the fiber bundle layers in the same pattern layer is gelled.   In the winding step, by adjusting the relationship between the time required for winding the fiber bundle and the time required for gelation of the curable resin, the fiber bundle stacked simultaneously with the winding of the fiber bundle. The manufacturing method of the composite container of Claim 1 or 2 which makes the said curable resin in a layer gelatinize. In the winding step, the fiber bundle wound around the liner is supplied from a fiber bundle supply unit,
The method for manufacturing a composite container according to any one of claims 1 to 3, wherein the fiber bundle supply unit cools the fiber bundle by a cooling unit.   5. The winding process according to claim 4, wherein in the winding step, the time required for gelation of the curable resin is adjusted by cooling the bobbin around which the fiber bundle is wound in the fiber bundle supply unit with the cooling unit. A method for manufacturing a composite container.   In the said winding process, the time required for gelatinization of the said curable resin is adjusted by heating the said fiber bundle, The manufacturing method of the composite container as described in any one of Claims 1-5. An apparatus for manufacturing a composite container having a reinforcing layer,
A fiber bundle layer is formed by winding a fiber bundle impregnated with a curable resin around the outer periphery of the liner, and a winding part for laminating a plurality of the fiber bundle layers;
A fiber bundle supply unit that supplies the fiber bundle wound around the liner,
The fiber bundle supply unit is provided with a cooling means for cooling the fiber bundle,
The said winding part is a manufacturing apparatus of the composite container which gelatinizes the said curable resin in the laminated | stacked said fiber bundle layer simultaneously with winding of the said fiber bundle.