JP2014218031A - Method and system for manufacturing composite container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and system for manufacturing a composite container, capable of improving the strength of composite container.SOLUTION: A helical layer 32 includes a second fiber bundle 10B impregnated with a thermosetting resin having a viscosity lower than that of the thermosetting resin of a first fiber bundle 10A to compose a hoop layer 31. Since the thermosetting resin for impregnation into the second fiber bundle 10B has low viscosity, the fiber bundle has a high fiber opening degree, allowing fibers to be easily opened from each other. Consequently, when the second fiber bundle 10B is compressed from other fiber bundles, the cross-sectional shape is easily deformed (easily collapsed). Accordingly, winding of the first fiber bundle 10A of the hoop layer 31 around the outer peripheral surface of the helical layer 32 causes collapse of the second fiber bundle 10B, so that the size T of bumps on the outer peripheral surface is decreased. The waviness and looseness of the hoop layer 31 is thus reduced, so that the strength of a composite container can be improved.

Description

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

  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, a fiber bundle impregnated with a thermosetting resin is wound around a liner to form a container intermediate, and the container intermediate is heated in a curing furnace to cure the thermosetting resin of the fiber bundle. ing.

JP 2008-304038 A

  Here, in the composite container manufactured by the conventional manufacturing method, the strength and strength of the composite container may be affected by the occurrence of undulation and looseness in the fiber bundle in the reinforcing layer. Accordingly, there has been a demand for improving the strength of the composite container by suppressing the undulation and loosening of those fiber bundles.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a composite container manufacturing method and a manufacturing system capable of improving the strength of the composite container.

  In order to solve the above problems, a method for manufacturing a composite container according to the present invention is a method for manufacturing a composite container having a reinforcing layer, and the first fiber bundle impregnated with a curable resin is disposed on the outer peripheral side of the liner. A hoop layer forming step of forming a hoop layer by wrapping around a helical layer, and a helical layer forming step of forming a helical layer by winding a fiber bundle impregnated with a curable resin around the outer periphery of the liner. In the process, part or all of the helical layer is constituted by a second fiber bundle impregnated with a curable resin having a lower viscosity than the curable resin of the first fiber bundle constituting the hoop layer.

  The composite container manufacturing system according to the present invention is a manufacturing system for manufacturing a composite container including a reinforcing layer, and is a first volume for winding a first fiber bundle impregnated with a curable resin around the outer periphery of a liner. A first winding portion, and a second winding portion that winds the second fiber bundle impregnated with a curable resin having a lower viscosity than the curable resin of the first fiber bundle around the outer periphery of the liner. Forms a hoop layer by winding the first fiber bundle around the outer periphery of the liner, and the second winding part forms part or all of the helical layer by winding the second fiber bundle around the outer periphery of the liner To do.

  In the present invention, part or all of the helical layer is constituted by the second fiber bundle impregnated with a curable resin having a lower viscosity than the curable resin of the first fiber bundle constituting the hoop layer. Since the viscosity of the curable resin impregnated in the second fiber bundle is low, the degree of opening of the fiber bundle is increased, and the fibers are easily opened, so that when the second fiber bundle is pressed against another fiber bundle, The cross-sectional shape is easily deformed (is easily crushed). Therefore, when the first fiber bundle of the hoop layer is wound around the outer peripheral surface of the helical layer, the second fiber bundle is crushed and the step size on the outer peripheral surface is reduced. Thereby, the waviness and looseness of the hoop layer are reduced, and the strength of the composite container can be improved.

  Further, at least the outer peripheral side of the helical layer may be constituted by the second fiber bundle. Thereby, the first fiber bundle of the hoop layer is wound, and the second fiber bundle on the outer peripheral side forming the step is deformed, so that the size of the step can be directly reduced.

  Moreover, the viscosity of the curable resin impregnated in the second fiber bundle may be lowered by mixing a diluent. Accordingly, even when the curable resin of the same material is used for the helical layer and the hoop layer, the viscosity of the curable resin impregnated in the second fiber bundle can be lowered by using the diluent.

  Further, the second fiber bundle may be impregnated with a curable resin relating to a material having a lower viscosity than the curable resin of the first fiber bundle. Thereby, the viscosity of the curable resin impregnated in the second fiber bundle can be lowered without using a diluent.

  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 of this invention. It is the figure which showed typically the cross section along the II-II line | wire shown in FIG. It is a schematic diagram for demonstrating a hoop layer and a helical layer. 1 is a schematic conceptual diagram of a manufacturing system according to an embodiment of the present invention. It is typical sectional drawing which shows the arrangement | sequence of the some fiber bundle wound. It is typical sectional drawing which shows the arrangement | sequence of the some fiber bundle wound. It is typical sectional drawing which shows the arrangement | sequence of the several fiber bundle wound by the conventional manufacturing system. It is a typical conceptual diagram of the manufacturing system which concerns on a modification. It is a typical conceptual diagram of the manufacturing system 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 showing a composite container manufactured by a manufacturing method and a manufacturing system according to an embodiment of the present invention. 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.

  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 thermosetting resin around the outer surface side of the liner 2 and heating and curing the fiber bundle 10 in a curing furnace. Types of thermosetting resins include phenolic resin, urea resin, unsaturated polyester resin, vinyl ester resin, polyimide resin, bismaleimide resin, polyimide resin, polyurethane resin, diallyl phthalate resin, epoxy resin, melamine resin or allyl resin However, it is not limited to these.

  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.

  When manufacturing the composite container 1 configured as described above, first, the fiber bundle 10 is wound around the outer surface side of the liner 2, so that a plurality of fiber bundle layers (fiber reinforced plastic layers) are formed on the outer surface side of the liner 2. Forming, thereby obtaining a container intermediate (winding step). A plurality of fiber bundle layers to be formed are wound so as to surround the hoop layer in which the fiber bundle 10 is wound around the liner 2 in the circumferential direction and the fiber bundle 10 in the circumferential direction while being inclined with respect to the liner 2. And a helical layer.

  In addition, the container intermediate is intended for the composite container 1 in the manufacturing process, and here, is intended for the state before the thermosetting resin of the fiber bundle 10 is thermoset (hereinafter the same). . Further, the winding method in the winding step is not particularly limited, but for example, an FW (filament winding) method can be adopted.

  And after the said winding process, the thermosetting resin of the fiber bundle 10 is hardened by heating a container intermediate body with a hardening furnace, and, thereby, the composite container 1 provided with the reinforcement layer 3 is obtained. (Curing process). Alternatively, the curing step may be performed simultaneously with the winding step, and in that case, curing by the curing furnace can be omitted.

  Next, the configuration of the reinforcing layer 3 will be described with reference to FIGS. FIG. 2 is a diagram schematically showing a cross section taken along line II-II shown in FIG. FIG. 3 is a schematic diagram for explaining the hoop layer 31 and the helical layer 32. As shown in FIG. 2, the reinforcing layer 3 is configured by alternately forming a plurality of hoop layers 31 and a plurality of helical layers 32. The order of forming the hoop layer 31 and the helical layer 32 is not particularly limited. That is, the hoop layer 31, the helical layer 32, the hoop layer 31... May be formed on the liner 2, or the helical layer 32, the hoop layer 31, the helical layer 32. Good.

  As shown in FIG. 3A, 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 the hoop layer 31 is formed, the outer peripheral surface of the container is covered with the fiber bundle 10 so that one layer (in order to distinguish from the hoop layer 31 and the helical layer 32, such a layer is referred to as “single layer”. The fiber bundle 10 is wound around the single layer to form a single layer. The hoop layer 31 is formed by forming a plurality of such single layers. The number of single layers 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. 3B, 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, after forming one single layer by covering the outer peripheral surface of the container with the fiber bundle 10, the fiber bundle 10 is wound on the single layer to further form a single layer. . The helical layer 32 is formed by forming a plurality of such single layers. The number of single layers 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, with reference to FIGS. 4 and 5, an example of the winding step (during winding) in the present embodiment will be described in detail.

  FIG. 4 is a schematic conceptual diagram of a manufacturing system used in a so-called Dry method in which a winding process is performed using a fiber bundle (tow prepreg) impregnated with a thermosetting resin in advance, and FIG. 5 is wound. It is typical sectional drawing which shows the arrangement | sequence of several fiber bundles. Here, the “toe prepreg” is a fiber bundle in which a resin is impregnated.

  As shown in FIG. 4, the manufacturing system 100 of this embodiment manufactures the said composite container 1, Comprising: It is used at the said winding process. The manufacturing system 100 includes a plurality of bobbins 101 wound around a fiber bundle 10 pre-impregnated with a thermosetting resin as a winding part 150, and here, a plurality of bobbins 101 around which the fiber bundle 10 is wound are provided. I have. Furthermore, the manufacturing system 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 rotating mechanism (not shown) that rotates the liner 2 so as to wind the fiber bundle 10 with the liner 2 are provided as the winding unit 150. In the manufacturing method by the manufacturing system 100, the fiber bundles 10 are supplied from the bobbin 101, and the fiber bundles 10 are adjusted while the bundle passing position at the time of winding is adjusted by the winding bundle passing position adjusting unit 102, and the moving unit 103 and It is wound around the outer surface side of the liner 2 by the cooperation of the rotation mechanism, whereby a fiber bundle layer is formed so as to cover the liner 2.

  The manufacturing system 100 of the present embodiment includes a first winding unit 150A that winds the first fiber bundle 10A around the outer periphery of the liner 2, and a second winding unit 150B that winds the second fiber bundle 10B around the outer periphery of the liner 2. It is equipped with. Each winding part 150A, 150B includes a plurality of bobbins 101A, 101B, a winding bundle passage position adjusting part 102, and a moving part 103. However, each winding part 150A, 150B may use at least one of the winding bundle passage position adjusting part 102 and the moving part 103 in common. The manufacturing system 100 can switch between the first winding unit 150A and the second winding unit 150B. The first winding portion 150 </ b> A forms the hoop layer 31 by winding the first fiber bundle 10 </ b> A around the outer periphery of the liner 2. The second winding unit 150 </ b> B forms the helical layer 32 by winding the second fiber bundle 10 </ b> B around the outer periphery side of the liner 2.

  Here, in the present embodiment, the second fiber bundle 10 </ b> B constituting the helical layer 32 has a lower thermosetting resin than the thermosetting resin impregnated in the first fiber bundle 10 </ b> A constituting the hoop layer 31. Is impregnated. Under the same conditions (such as temperature conditions), the viscosity of the thermosetting resin impregnated in the second fiber bundle 10B is lower than the viscosity of the thermosetting resin impregnated in the first fiber bundle 10A.

  The thermosetting resin impregnated in the second fiber bundle 10B may be reduced in viscosity by mixing with a diluent. Accordingly, even when the thermosetting resin of the same material is used for the helical layer 32 and the hoop layer 31, the viscosity of the thermosetting resin impregnated in the second fiber bundle 10B is lowered by using a diluent. (However, thermosetting resins according to different materials may be used for the first fiber bundle 10A and the second fiber bundle 10B.) Note that no diluent is mixed in the thermosetting resin impregnated in the first fiber bundle 10A. As the diluent, a reactive diluent for the thermosetting resin of the second fiber bundle 10B may be used, and a non-reactive diluent may be used. When a reactive diluent is used, the viscosity of the thermosetting resin is lowered before curing, and is cured together with the thermosetting resin at the time of final curing. When a non-reactive diluent is used, the viscosity of the thermosetting resin is lowered before curing, and it can be removed from the thermosetting resin by evaporation at the time of final curing. At this time, the final curing temperature is set higher than the boiling point of the diluent. In the case of the manufacturing system 100 shown in FIG. 4, a thermosetting resin already diluted with a diluent in the state of the bobbin 101 is used.

  When an epoxy resin is used as the thermosetting resin of the second fiber bundle 10B, alkyl monoglycidyl ether, alkyl glycidyl ether, alkylphenol monoglycidyl ether, 1,6-hexanediol glycidyl ether, butyl glycidyl are used as reactive diluents. Ether (BGE), a commercially available reactive diluent, or a reactive diluent diluted epoxy resin may be employed.

  When an epoxy resin is used as the thermosetting resin of the second fiber bundle 10B, xylene, methyl ethyl ketone, n-butanol, cyclohexane, or a commercially available non-reactive diluent or non-reactive dilution is used as the non-reactive diluent. You may employ | adopt an agent dilution type epoxy resin.

  Alternatively, the second fiber bundle 10B may be impregnated with a thermosetting resin according to a material having a lower viscosity than the curable resin of the first fiber bundle 10A. Thereby, the viscosity of the curable resin impregnated in the second fiber bundle 10B can be lowered without using a diluent. For example, when an epoxy resin is employed as the thermosetting resin of the first fiber bundle, an epoxy resin, a phenol resin, or the like may be employed as the thermosetting resin of the second fiber bundle 10B.

  Using the fiber bundles 10A and 10B as described above, the manufacturing system 100 forms the hoop layer 31 by winding the first fiber bundle 10A around the outer periphery of the liner 2 by the first winding unit 150A (hoop layer formation). Process). When the formation of the hoop layer 31 is completed, the first fiber bundle 10A is cut, the first winding part 150A and the second winding part 150B are switched, and the helical layer 32 is formed by the second winding part 150B (helical) Layer forming step). The formation of the hoop layer 31 and the formation of the helical layer 32 are repeated. After the predetermined number of hoop layers 31 and helical layers 32 are formed, the thermosetting resin of the fiber bundles 10A and 10B is cured by heating the container intermediate in a curing furnace. At this time, the reactive diluent is cured together with the thermosetting resin, and the non-reactive diluent is evaporated off.

  By the way, since the helical layer 32 is formed by winding the fiber bundle 10 while intersecting (for example, refer to the portion indicated by CE in FIG. 3B), the helical layer 32 is formed as shown in FIG. A step (a step size is indicated by T in the figure) is formed on the outer peripheral surface of 32. When a fiber bundle 10A impregnated with a thermosetting resin having the same viscosity is used as the fiber bundle constituting the helical layer 32 and the fiber bundle constituting the hoop layer 31 as in the conventional manufacturing system, there is a step. By winding the fiber bundle 10 </ b> A constituting the hoop layer 31 around the outer peripheral surface of the helical layer 32, the wound fiber bundle 10 </ b> A is wound in a distorted state along the step of the helical layer 32. As a result, the hoop layer 31 may be wavy or loosened, which may affect the strength of the composite container.

  In this regard, in the present embodiment, the helical layer 32 is configured by the second fiber bundle 10B impregnated with a thermosetting resin having a lower viscosity than the thermosetting resin of the first fiber bundle 10A constituting the hoop layer 31. The Since the viscosity of the thermosetting resin impregnated in the second fiber bundle 10B is low, the degree of fiber bundle opening is increased, and the fibers are easily opened, whereby the second fiber bundle 10B is pressed against another fiber bundle. In this case, the cross-sectional shape is easily deformed (is easily crushed). Therefore, as shown in FIG. 5A, the first fiber bundle 10A of the hoop layer 31 is wound around the outer peripheral surface of the helical layer 32, whereby the second fiber bundle 10B is crushed, and the size of the step on the outer peripheral surface. T decreases. Thereby, the waviness and looseness of the hoop layer 31 are reduced, and the strength of the composite container can be improved.

  In the present embodiment, the entire helical layer 32 is configured by the second fiber bundle 10B having a low viscosity of the thermosetting resin. That is, the outer peripheral side region E1, the intermediate region E2, and the inner peripheral side region E3 of the helical layer 3 are all configured by the second fiber bundle 10B. Since the outer peripheral side region E1 is constituted by the second fiber bundle 10B, the second fiber bundle 10B related to the stepped convex portion 33 is deformed by winding the first fiber bundle 10A constituting the hoop layer 31. Thus, the step size T can be directly reduced. In addition, since the intermediate region E2 and the inner peripheral region E3 are also constituted by the second fiber bundle, when the convex portion 33 of the step on the outer peripheral surface is pushed by the hoop layer 31, the portion is easily submerged. Can do. Therefore, the step size T of the helical layer 32 can be reduced.

  In addition, when the viscosity of the thermosetting resin of the first fiber bundle 10 </ b> A constituting the hoop layer 31 is lowered, the influence of distortion due to the low viscosity is produced. On the other hand, when the viscosity of the thermosetting resin of the second fiber bundle 10 </ b> B constituting the helical layer 32 is lowered, there is an influence of distortion caused by the low viscosity, but the level difference is reduced by setting the degree of reduction. The merit of this is greater.

  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, a thermosetting resin is used as the curable resin. However, for example, a photocurable resin or the like may be used, and various curable resins may be used. In addition, as a photocurable resin, the curable resin of an epoxy resin is included as a main component.

  Moreover, the manufacturing system is not limited to the structure shown in FIG. 4, and has any system configuration as long as it can wind the first fiber bundle 10 </ b> A and the second fiber bundle 10 </ b> B having different viscosities. May be. For example, a manufacturing system 200 as shown in FIG. 8 and a manufacturing system 300 as shown in FIG. 9 may be adopted.

  FIG. 8 is a schematic conceptual diagram of a composite container manufacturing system 200 according to a modification. This manufacturing system 200 is used in a resin bath method of a so-called Wet method in which a fiber bundle is supplied while impregnating a thermosetting resin and a winding step is performed. As shown in FIG. 8, the manufacturing system 200 includes a first winding part 250A for winding the first fiber bundle 10A and a second winding part 250B for winding the second fiber bundle 10B. . Winding portions 250A and 250B of manufacturing system 200 contain a plurality of bobbins 101 wound around fiber bundle RS as a raw yarn before impregnating thermosetting resins 202A and 202B, and thermosetting resins 202A and 202B. Resin buses 203A and 203B, a rotating roll 204 that rotates in the resin buses 203A and 203B and impregnates the fiber bundle RS with a thermosetting resin, a resin content adjustment roll 206 that adjusts the resin content, and a moving unit 207 And a rotation mechanism (not shown) for rotating the liner 2 so that the fiber bundles 10A and 10B impregnated with the thermosetting resins 202A and 202B are wound around the liner 2. The manufacturing system 200 can switch between the first winding unit 250A and the second winding unit 250B.

  In the manufacturing method by the manufacturing system 200, fiber bundles RS as raw yarns are supplied from the bobbin 101, and these fiber bundles RS are guided into the resin buses 203A and 203B, and can be rotated in the resin buses 203A and 203B. The thermosetting resins 202A and 202B are impregnated while being guided around the periphery of the provided rotating rolls 204A and 204B. Thereafter, the surplus thermosetting resins 202A and 202B are squeezed out by the resin content adjusting rolls 206A and 206B, the resin content is adjusted, supplied to the subsequent stage as the fiber bundles 10A and 10B, and wound around the liner 2.

  The resin bath 203B stores a thermosetting resin 202B having a lower viscosity than the thermosetting resin 202A of the resin bath 203A. Specifically, the thermosetting resin 202A in a state of being mixed with a diluent may be stored in the resin bath 203B. Alternatively, the thermosetting resin 202B having a lower viscosity than the thermosetting resin 202A may be stored.

  One of the first winding part 250A and the second winding part 250B may be a winding part that employs the Wet method, and the other may be a winding part that employs the Dry method. Further, in the second winding part 250B, only the diluent is stored in the resin bath 203B, and the resin bath 203B is diluted with the thermosetting resin by passing the tow prepreg previously impregnated with the thermosetting resin. An agent may be mixed.

  FIG. 9 is a schematic conceptual diagram of a composite container manufacturing system 300 according to a modification. The manufacturing system 300 shares one winding part 350 as the first winding part 350A and the second winding part 350B, and when used as the second winding part 350B, the resin bath in which the diluent 302 is stored. 303 is set at the position of the rotary roll 204. A bobbin 101 is wound with a tow prepreg as a first fiber bundle 10A preliminarily impregnated with a thermosetting resin. When forming the hoop layer 31, the manufacturing system 300 keeps the resin bath 303 away from the rotary roll 204 and winds the first fiber bundle 10 </ b> A not mixed with the diluent 302 around the liner 2. On the other hand, when forming the helical layer 32, the manufacturing system 300 sets the resin bath 303 at the position of the rotary roll 204, and mixes the diluent 302 with the thermosetting resin of the first fiber bundle 10A, so that the viscosity is low. It is wound around the liner 2 as the second fiber bundle 10B.

  Moreover, in the above-mentioned embodiment, although the whole helical layer 32 was comprised by the 2nd fiber bundle 10B, a part of helical layer 32 should just be comprised by the 2nd fiber bundle 10B. That is, in the helical layer 32, at least one region (or two regions) of the outer peripheral side region E1, the intermediate region E2, and the inner peripheral side region E3 may be configured by the helical layer 32. Such a helical layer 32 can be formed using, for example, the manufacturing system 300 shown in FIG.

  For example, as shown in FIG. 5B, only the outer peripheral side region E1 of the helical layer 32 may be configured by the second fiber bundle 10B, and the other region may be configured by the first fiber bundle 10A. Since the outer peripheral side region E1 is constituted by the second fiber bundle 10B, the second fiber bundle 10B related to the stepped convex portion 33 is directly deformed by winding the first fiber bundle 10A constituting the hoop layer 31. As a result, the size T of the step can be reduced.

  Moreover, as shown to Fig.6 (a), only the inner peripheral side area | region E3 of the helical layer 32 may be comprised by the 2nd fiber bundle 10B, and the other area | region may be comprised by 10 A of 1st fiber bundles. Moreover, as shown in FIG.6 (b), only the intermediate | middle area | region E2 of the helical layer 32 may be comprised by the 2nd fiber bundle 10B, and the other area | region may be comprised by 10 A of 1st fiber bundles. Thereby, when the convex part 33 of the level | step difference in an outer peripheral surface is pushed by the hoop layer 31, the said part can be made easy to sink. Therefore, the step size T of the helical layer 32 can be reduced.

DESCRIPTION OF SYMBOLS 1 ... Composite container, 2 ... Liner, 3 ... Reinforcement layer, 4 ... Base, 10A ... 1st fiber bundle, 10B ... 2nd fiber bundle, 31 ... Hoop layer, 32 ... Helical layer, 100, 200, 300 ... Manufacturing system , 150A, 250A, 350A ... first winding part, 150B, 250B, 350B ... second winding part.

Claims (5)

A manufacturing method for manufacturing a composite container having a reinforcing layer,
A hoop layer forming step of forming a hoop layer by winding the first fiber bundle impregnated with the curable resin around the outer periphery of the liner;
A helical layer forming step of forming a helical layer by winding a fiber bundle impregnated with a curable resin around the outer peripheral side of the liner, and
In the helical layer forming step, part or all of the helical layer is constituted by a second fiber bundle impregnated with a curable resin having a viscosity lower than that of the curable resin of the first fiber bundle constituting the hoop layer. A method for producing a composite container.   The method for manufacturing a composite container according to claim 1, wherein at least an outer peripheral side of the helical layer is configured by the second fiber bundle.   The method for producing a composite container according to claim 1 or 2, wherein the curable resin impregnated in the second fiber bundle has a low viscosity by mixing a diluent.   The method for producing a composite container according to claim 1 or 2, wherein the second fiber bundle is impregnated with a curable resin having a viscosity lower than that of the curable resin of the first fiber bundle. A manufacturing system for manufacturing a composite container having a reinforcing layer,
A first winding portion for winding the first fiber bundle impregnated with the curable resin around the outer periphery of the liner;
A second winding part for winding the second fiber bundle impregnated with a curable resin having a viscosity lower than that of the curable resin of the first fiber bundle around the outer peripheral side of the liner,
The first winding portion forms a hoop layer by winding the first fiber bundle around the outer periphery of the liner,
The said 2nd winding part is a manufacturing system of a composite container which forms a part or all of a helical layer by winding the said 2nd fiber bundle around the outer peripheral side of the said liner.