JP5609249B2 - High pressure tank manufacturing method, high pressure tank manufacturing apparatus, and high pressure tank - Google Patents

Description

  The present invention relates to a high-pressure tank manufacturing method, a high-pressure tank manufacturing apparatus, and a high-pressure tank.

  Fuel cell vehicles and natural gas vehicles are equipped with a high-pressure tank for storing hydrogen gas, natural gas, or the like as fuel gas. As a high-pressure tank, a high-pressure tank reinforced by winding a carbon fiber reinforced plastic material (CFRP material) or the like having a very high strength per unit density around the outer surface of a resin or metal tank (liner: inner container) is known. . When manufacturing such a high-pressure tank, the fiber layer is wound around the outer surface of a resin tank in a state where a fiber bundle such as carbon fiber is impregnated with a matrix resin such as an uncured epoxy resin as in the filament winding method. There is a method of forming a reinforcing layer by curing the resin after the formation. In this filament winding method, from the viewpoint of productivity and the like, a prepreg in which a fiber bundle such as carbon fiber is impregnated with a matrix resin such as an uncured epoxy resin in advance and wound around a bobbin or the like may be used. Further, from the viewpoint of production efficiency and the like, the fiber bundle is usually wound around the outer surface of the liner using a plurality of prepregs.

  When manufacturing a high-pressure tank by the filament winding method, it is preferable to increase the adhesion of fibers such as carbon fibers in order to ensure high strength of the tank.

  Normally, a fiber layer is formed by winding a fiber bundle impregnated with a resin into a liner, forming a fiber layer, and heat-curing to form a reinforcing layer, but the resin impregnated into the fiber bundle at the time of winding or heat-curing oozes out. When the resin content of the fiber bundle decreases, the fiber adhesion may decrease, and the strength of the high-pressure tank may decrease. Therefore, there is a possibility that the performance required for the high-pressure tank cannot be sufficiently satisfied.

  In Patent Document 1, in order to obtain a unidirectional carbon fiber prepreg material with less lift from the release paper, a plurality of carbon fiber bundles are arranged on both upper and lower surfaces of a carbon fiber sheet that are aligned in parallel to each other in one direction. After stacking release paper, at least one of which is matrix resin coated release paper, passing the overlapped body through an impregnation roll, transferring and impregnating the matrix resin on the release paper to the carbon fiber sheet to obtain a unidirectional carbon fiber prepreg When peeling the upper release paper and winding the unidirectional carbon fiber prepreg together with the lower release paper into a roll, the tension Tf of the carbon fiber bundle, the tension Tu of the upper release paper leading to the impregnation roll, the lower Production of a unidirectional carbon fiber prepreg material that maintains the ratio Tw / Ts of the release paper tension Ts, the lower release paper winding tension Tw, and the lower release paper tension Ts within a predetermined range. The method has been described.

  However, the technique of Patent Document 1 may not sufficiently suppress a decrease in the resin content of the fiber bundle at the time of winding around the liner.

JP-A-2005-014600

  The present invention is a high-pressure tank manufacturing method, a high-pressure tank manufacturing apparatus, and a high-pressure tank that can suppress a decrease in the resin content of a fiber bundle during winding around a liner.

  The present invention relates to a method for manufacturing a high-pressure tank having a liner and a reinforcing layer including a fiber layer in which fibers are wound around the outer surface of the liner, the fiber bundle being impregnated with a matrix resin. At least one first resin-impregnated fiber bundle and at least two second resin-impregnated fiber bundles in which the fiber bundle is impregnated with a matrix resin are used at the same time, A fiber layer forming step of arranging a resin-impregnated fiber bundle and winding the fiber bundle around an outer surface of the liner to form a fiber layer; and a curing step of curing the matrix resin. ) A method of setting the curing temperature of the matrix resin contained in the first resin-impregnated fiber bundle higher than the curing temperature of the matrix resin contained in the second resin-impregnated fiber bundle, and (2) A method in which the tension of the fiber when the first resin-impregnated fiber bundle is wound around the outer surface of the liner is lower than the tension of the fiber when the second resin-impregnated fiber bundle is wound around the outer surface of the liner, It is a manufacturing method of a high-pressure tank using at least one of them.

  Further, in the method for manufacturing the high-pressure tank, a fiber layer is formed by arranging the second resin-impregnated fiber bundle so as to overlap a part of both ends of the first resin-impregnated fiber bundle and winding the fiber bundle around the outer surface of the liner. Is preferably formed.

The present invention also provides a high-pressure tank manufacturing apparatus for manufacturing a high-pressure tank having a liner and a reinforcing layer including a fiber layer in which fibers are wound around the outer surface of the liner, and a matrix resin is used for the fiber bundle. At least one first resin impregnated fiber bundle supply means for supplying the impregnated first resin impregnated fiber bundle, and at least two second resin impregnations for supplying the second resin impregnated fiber bundle in which the fiber bundle is impregnated with the matrix resin has a fiber bundle supply means, and the tension of the fiber during winding the pre-Symbol first resin-impregnated fiber bundle to the outer surface of said liner, said second resin-impregnated fiber bundle of the fibers during winding on the outer surface of the liner further comprising a tension control means to be lower than the tension, with the at least one first resin-impregnated fiber bundle supply means and said at least two second resin-impregnated fiber bundle supply means at the same time, Using the serial tension control hand stage, in the manufacturing apparatus of the high-pressure tank to form a fiber layer by winding a fiber bundle on the outer surface of the liner by placing the second resin-impregnated fiber bundle at both ends of the first resin-impregnated fiber bundle is there.

  In the present invention, at least one second resin-impregnated fiber bundle containing a fiber bundle and a matrix resin is disposed on both ends of the liner, at least one first resin-impregnated fiber bundle containing a fiber bundle and a matrix resin. And a reinforcing layer configured to include a fiber layer wound around the outer surface of the liner, and the curing temperature of the matrix resin included in the first resin-impregnated fiber bundle is the second resin-impregnated The high-pressure tank is higher than the curing temperature of the matrix resin contained in the fiber bundle.

  In the present invention, when forming a fiber layer by wrapping the fiber bundle around the outer surface of the liner so that the second resin-impregnated fiber bundle is disposed on both ends of the first resin-impregnated fiber bundle, A method of increasing the curing temperature of the contained matrix resin higher than the curing temperature of the matrix resin contained in the second resin-impregnated fiber bundle, and the tension of the fibers of the first resin-impregnated fiber bundle is By using at least one of the methods for lowering the tension, a method for manufacturing a high-pressure tank, a high-pressure tank manufacturing apparatus, and the like that can suppress a decrease in the resin content of the fiber bundle at the time of winding around the liner, etc. Provide high-pressure tank.

It is the schematic which shows the whole structure of an example of the manufacturing apparatus of the high pressure tank which concerns on embodiment of this invention. It is the schematic which shows an example of a structure of the winding part of the fiber in the manufacturing apparatus of the high pressure tank which concerns on embodiment of this invention. It is the schematic which shows the cross section of the axial direction of the high pressure tank in the manufacturing method of the high pressure tank in embodiment of this invention. It is a schematic sectional drawing which shows an example of arrangement | positioning of the 1st resin impregnation fiber bundle and the 2nd resin impregnation fiber bundle seen from the orientation direction of the fiber bundle in embodiment of this invention. It is a schematic sectional drawing which shows the other example of arrangement | positioning of the 1st resin impregnation fiber bundle and the 2nd resin impregnation fiber bundle seen from the orientation direction of the fiber bundle in embodiment of this invention. It is the schematic which shows the whole structure of the other example of the manufacturing apparatus of the high pressure tank which concerns on embodiment of this invention.

  Embodiments of the present invention will be described below. This embodiment is an example for carrying out the present invention, and the present invention is not limited to this embodiment.

  FIG. 1 shows an outline of an overall configuration of an example of a high-pressure tank manufacturing apparatus according to an embodiment of the present invention. Moreover, the outline of an example of a structure of the winding part of the fiber in the manufacturing apparatus of the high pressure tank which concerns on this embodiment is shown in FIG.

  As shown in FIG. 1, the high-pressure tank manufacturing apparatus 1 includes a fiber winding device 10. The fiber winding device 10 has a rotation support portion 12 for supporting the liner 16. In addition, the high-pressure tank manufacturing apparatus 1 has a first resin-impregnated fiber bundle 26a in which a fiber bundle such as carbon fiber is impregnated with a first matrix resin such as an uncured epoxy resin in advance as a first resin-impregnated fiber bundle supply means. A first prepreg 22a wound around a bobbin or the like, a first prepreg 22b wound around a bobbin or the like with a first resin-impregnated fiber bundle 26b obtained by impregnating a fiber bundle with an uncured first matrix resin in advance, and a second resin impregnated As a fiber bundle supply means, a second prepreg 24a in which a second resin-impregnated fiber bundle 28a obtained by pre-impregnating a fiber bundle such as carbon fiber with a second matrix resin such as an uncured epoxy resin is wound around a bobbin or the like, and a fiber bundle And a second prepreg 24b in which a second resin-impregnated fiber bundle 28b pre-impregnated with an uncured second matrix resin is wound around a bobbin or the like.

  The operation of the high-pressure tank manufacturing method and the high-pressure tank manufacturing apparatus 1 according to this embodiment will be described.

  As shown in FIGS. 1 and 2, the liner 16 is installed on the rotation support portion 12 of the fiber winding device 10. For example, the substantially cylindrical liner 16 is supported on the rotation support portion 12 as shown in FIG. 2 by a shaft 20 that passes through the axis of the liner 16 as shown in FIG. The liner 16 is rotated by the rotation support portion 12, and the first resin-impregnated fiber bundles 26a and 26b and the second resin-impregnated fiber bundles 28a and 28b fed out from the first prepregs 22a and 22b and the second prepregs 24a and 24b, respectively. FIG. 4 shows a fiber bundle 32 in which second resin-impregnated fiber bundles 28a and 28b are arranged on both ends of the first resin-impregnated fiber bundles 26a and 26b as shown in a cross-sectional view seen from the orientation direction of the fiber bundle. Further, the angle is adjusted by the fiber guide portion 34 as shown in FIG. 2, and it is wound around the outer surface of the liner 16. Thus, the fiber bundle 32 is wound around the outer surface of the liner 16 in a predetermined thickness and in a predetermined direction to form a fiber layer (fiber layer forming step).

  Before winding the fiber bundle 32 around the liner 16, widening means such as a widening roller 30 is provided as shown in FIG. 1, and the first resin-impregnated fiber bundle 26a, 26b and the second resin-impregnated fiber bundle 28a, 28b may be pressed and widened in advance. Here, expanding the fiber bundle means, for example, that the fibers constituting the fiber bundle are expanded to make the fiber bundle substantially flat.

  Without using the prepreg, for example, the fiber bundle may be impregnated with a thermosetting matrix resin such as an epoxy resin by a method of immersing the fiber bundle in a resin coating tank or the like on the upstream side of the fiber winding device 10.

  After the winding process of the fiber bundle 32, the high-pressure tank 14 is heat-treated in a heating furnace or the like. The high-pressure tank 14 is heated at, for example, about 130 ° C. for about 10 to 15 hours. By this heating, the fiber bundle 32 impregnated with the thermosetting resin or the like is thermoset (curing step), and the reinforcing layer 18 as shown in FIG. 3 is formed. Thereafter, the high-pressure tank 14 is cooled. In this way, the high-pressure tank 14 in which the reinforcing layer 18 is formed on the outer surface of the liner 16 is manufactured.

  In the present embodiment, the curing temperature of the first matrix resin contained in the first resin-impregnated fiber bundles 26a, 26b is set higher than the curing temperature of the second matrix resin contained in the second resin-impregnated fiber bundles 28a, 28b. is there.

  In order to ensure high strength in the high-pressure tank, it is desirable to increase the adhesion of fibers such as carbon fibers. In the filament winding method, the resin impregnated in the fiber bundle may ooze out due to the tension of the fiber when the fiber bundle is wound, and the resin content of the fiber bundle may decrease. Also, in the curing process, the resin viscosity drastically decreases at the time of heat curing, so that resin dripping occurs and the resin impregnated in the fiber bundle oozes out, and the resin content of the fiber bundle may decrease. . By increasing the tension of the fiber and increasing the temperature at the time of curing, the seepage of the resin and the dripping of the resin become more prominent, and the problem of a decrease in the resin content becomes greater. When the resin content of the fiber bundle decreases, the fiber adhesion decreases, the strength of the high-pressure tank decreases, and the performance required for the high-pressure tank may not be fully satisfied. In this embodiment, the curing temperature of the resin impregnated on both ends and the inner fiber bundle is differentiated, and the fiber bundle impregnated with the low-temperature curing resin on both ends and the fiber bundle impregnated with the high-temperature curing resin on the inner side are arranged. By wrapping around the liner, the low-temperature-cured fibers disposed on both ends in the curing step start to cure first, thereby preventing the resin from bleeding. Since the fiber bundle can be wound around the liner while suppressing a decrease in the resin content, a high-pressure tank having stable strength, quality, and dimensions can be produced.

  Moreover, since the resin dripping at the time of hardening can be prevented, generation | occurrence | production of the burr | flash of resin can be suppressed and the removal process of a burr | flash can be skipped.

  The curing temperature of the first matrix resin contained in the first resin-impregnated fiber bundles 26a, 26b is not particularly limited as long as it is higher than the curing temperature of the second matrix resin contained in the second resin-impregnated fiber bundles 28a, 28b. . The temperature difference between the two is, for example, in the range of 30 ° C to 100 ° C, and preferably in the range of 40 ° C to 50 ° C. For example, what is necessary is just to make the hardening temperature of 1st matrix resin into the range of 100 to 120 degreeC. When the curing temperature of the matrix resin is lower than 50 ° C., the storage stability of the resin may be lowered.

  In this specification, “uncured” includes not only a state in which curing has not progressed but also a state in which partial curing has proceeded.

  In the present embodiment, as shown in a cross-sectional view as viewed from the fiber bundle orientation direction in FIG. 5, the second resin-impregnated fiber bundles 28a and 28b partially overlap each other on both ends of the first resin-impregnated fiber bundles 26a and 26b. It is preferable that the fiber layer is formed by winding the fiber bundle around the outer surface of the liner 16. Thereby, the fiber of both ends suppresses the seepage of the resin, and the decrease in the resin content is further suppressed.

  The overlapping width of the fiber bundles may be, for example, in a range of about 10% to 30% of the entire width of each fiber bundle after the width is made as small as possible. When the width of each fiber bundle after widening is about 3 to 4 mm, for example, the overlapping width may be about 1 mm.

  FIG. 6 shows an outline of the overall configuration of another example of the high-pressure tank manufacturing apparatus according to the embodiment of the present invention. The high-pressure tank manufacturing apparatus 1 shown in FIG. 6 is a first resin-impregnated fiber bundle 40a in which a fiber bundle such as carbon fiber is pre-impregnated with a matrix resin such as an uncured epoxy resin as a first resin-impregnated fiber bundle supply means. A first prepreg 36b wound around a bobbin or the like, a first prepreg 36b obtained by winding a fiber bundle with an uncured matrix resin pre-impregnated with a first resin-impregnated fiber bundle 40b around a bobbin or the like, and a second resin-impregnated fiber bundle As supply means, a second prepreg 38a in which a second resin-impregnated fiber bundle 42a obtained by pre-impregnating a fiber bundle such as carbon fiber with a matrix resin such as an uncured epoxy resin is wound around a bobbin or the like, and the fiber bundle is uncured. A second prepreg 38b in which a second resin-impregnated fiber bundle 42b pre-impregnated with a matrix resin is wound around a bobbin or the like. The matrix resin included in the first resin-impregnated fiber bundles 40a and 40b and the matrix resin included in the second resin-impregnated fiber bundles 42a and 42b may be the same or different.

  The liner 16 is rotated by the rotation support portion 12, and the first resin-impregnated fiber bundles 40a and 40b and the second resin-impregnated fiber bundles 42a and 42b fed from the first prepregs 36a and 36b and the second prepregs 38a and 38b, respectively. 4, a fiber bundle 44 in which the second resin-impregnated fiber bundles 42 a and 42 b are arranged on both ends of the first resin-impregnated fiber bundles 40 a and 40 b is used, and the angle is adjusted by the fiber guide portion 34 as shown in FIG. 2. And wound around the outer surface of the liner 16. Thus, the fiber bundle 44 is wound around the outer surface of the liner 16 in a predetermined thickness and in a predetermined direction to form a fiber layer (fiber layer forming step).

  In the present embodiment, the tension of the fibers when the first resin-impregnated fiber bundles 40a and 40b are wound around the outer surface of the liner 16 is determined from the tension of the fibers when the second resin-impregnated fiber bundles 42a and 42b are wound around the outer surface of the liner 16. Also lower. By differentiating the tension between the fibers on both ends and the inside, the fibers on both ends can be wound around the liner 16 with high tension and the fibers on the inside with low tension. .

  The tension of the fibers when winding the first resin-impregnated fiber bundles 40a and 40b is not particularly limited as long as it is lower than the tension of the fibers when winding the second resin-impregnated fiber bundles 42a and 42b. The tension difference between the two is, for example, in the range of 50N to 150N. For example, the fiber tension when winding the first resin-impregnated fiber bundles 40a and 40b is in the range of 50N to 100N, and the fiber tension when winding the second resin-impregnated fiber bundles 42a and 42b is in the range of 150N to 200N. That's fine.

  There is no particular limitation on the method of giving a difference between the tensions on both ends and the inner side. For example, an encoder or the like may be set on the yarn feeding guide 46 to give a difference in the tension between the ends and the inner side. .

  Also in this configuration, as in FIG. 5, the second resin-impregnated fiber bundles 42a and 42b are arranged so as to partially overlap the both ends of the first resin-impregnated fiber bundles 40a and 40b, and the fiber bundles are arranged on the outer surface of the liner 16. Is preferably wound to form a fiber layer.

  In terms of the effect of suppressing the seepage of the resin, it is preferable to make a difference in the curing temperature of the resin impregnated in the both ends and the inner fiber bundle. A configuration that makes a difference in tension is more preferable. You may combine the structure which makes a difference in the curing temperature of the resin which impregnated the fiber bundle of both ends and an inner side, and the structure which makes a difference in the tension | tensile_strength of both ends and an inner side.

  The high-pressure tank 14 includes a liner (inner container) 16 and a reinforcing layer (outer layer) 18. Further, the high-pressure tank 14 may include a gas filling / releasing port.

  The liner 16 is formed in a substantially cylindrical shape or the like, for example, for accommodating a medium such as high-pressure hydrogen gas therein, and is a layer in direct contact with a gas such as hydrogen gas. The shape, size, and thickness of the liner 16 can be arbitrarily selected according to the purpose of use, specifications, and the like. The liner 16 has a thickness in the range of 2 mm to 4 mm, for example.

  The liner 16 includes a resin material, a metal, and the like. Examples of the resin material constituting the liner 16 include a thermoplastic resin and a thermosetting resin. Examples of the thermoplastic resin include polyethylene, polypropylene, polyvinyl chloride, ABS resin, polystyrene, polyamide, polycarbonate, polyimide, and fluorine resin. Examples of the thermosetting resin include epoxy resin and polyurethane. Examples of the metal constituting the liner include metals such as aluminum alloys. The thickness of the liner and the type of material constituting the liner can be appropriately selected according to the strength, hermeticity, moldability, and the like required for the liner 16. Of these, polyamide resins such as nylon are preferable from the viewpoint of strength and gas permeability resistance.

  The liner 16 made of a resin material is formed by, for example, injection molding of the resin. For example, a resin such as a polyamide resin is poured into a mold, two substantially semi-cylindrical bodies are formed, and these are welded by a laser or the like to form the resin liner 16. By this injection molding, the liner 16 having a substantially uniform thickness is formed.

  The reinforcing layer 18 is a layer that is provided so as to cover the outer side of the liner 16 and reinforces the liner 16, and includes, for example, a fiber and a matrix resin. Examples of the fibers constituting the reinforcing layer 18 include glass fibers, carbon fibers, aramid fibers, and metal fibers.

  Moreover, as a matrix resin which comprises the reinforcement layer 18, a thermoplastic resin, a thermosetting resin, etc. are mentioned. Examples of the thermoplastic resin include polyethylene, polypropylene, polyvinyl chloride, ABS resin, polystyrene, polyamide, polycarbonate, polyimide, and fluorine resin. Examples of the thermosetting resin include epoxy resin and polyurethane. Among these, an epoxy resin is preferable from the viewpoints of strength, adhesiveness, gas permeability resistance, and the like.

  The reinforcing layer 18 can be formed by, for example, winding the fiber bundle of fibers around the outer surface of the liner 16 in a state where the matrix resin solution is impregnated, and then curing the resin.

  The thickness of the reinforcing layer 18 can be adjusted by the number of layers of the fiber bundles 32 and 44 to be wound, and is, for example, in the range of 20 mm to 40 mm. The number of layers of the fiber bundles 32 and 44 is, for example, about 30 to 60 layers.

  The fiber bundles 32 and 44 are, for example, bundles of about 10,000 to 40,000 fibers.

  Usually, the winding direction of the fiber bundles 32 and 44 is substantially perpendicular to the rotation axis of the liner 16 or oblique.

  The prepreg (first prepreg 22a, 22b, 36a, 36b, second prepreg 24a, 24b, 38a, 38b) is obtained by, for example, impregnating a fiber bundle such as carbon fiber with a matrix resin such as an uncured epoxy resin in advance. Is wound around a bobbin or the like, and there is no particular limitation on the shape, configuration, and the like.

  At least three prepregs are used. When three prepregs are used, there is one prepreg for the fiber bundle arranged on the inner side, two prepregs for the fiber bundle arranged on both ends, and when four prepregs are used, the fibers arranged on the inner side. There are two bundle prepregs and two fiber bundle prepregs arranged on both ends. In the case of using six prepregs, for example, there are four prepregs for fiber bundles arranged on the inner side and two prepregs for fiber bundles arranged on both ends, but these are appropriately changed according to the target performance and the like. be able to.

  The high-pressure tank 14 according to the present embodiment is, for example, a high-pressure tank that is mounted on a moving body and stores high-pressure gas therein. The high-pressure tank 14 may be a stationary high-pressure tank.

  Here, examples of the moving body include two-wheeled vehicles, automobiles having four or more wheels such as buses and passenger cars, trains, ships, airplanes, robots, and the like, and particularly fuel cell vehicles. Examples of the high pressure gas include hydrogen gas and compressed natural gas.

  The fiber bundle obtained by the high-pressure tank manufacturing apparatus and the high-pressure tank manufacturing method according to the present embodiment is used as a reinforcing material for various materials as a fiber reinforced plastic material (FRP material) that has been impregnated with a resin solution and cured. be able to. For example, in the case of carbon fiber, a carbon fiber reinforced plastic material (CFRP material) in which a fiber bundle of carbon fiber is impregnated with a resin solution such as an epoxy resin is used as a reinforcing material for a high-pressure tank, an automobile shaft, an aircraft fuselage, parts, etc. Can be used as

DESCRIPTION OF SYMBOLS 1 High pressure tank manufacturing apparatus, 10 Fiber winding apparatus, 12 Rotation support part, 14 High pressure tank, 16 Liner (inner container), 18 Reinforcement layer (outer layer), 20 Shaft, 22a, 22b, 36a, 36b First prepreg, 24a , 24b, 38a, 38b Second prepreg, 26a, 26b, 40a, 40b First resin impregnated fiber bundle, 28a, 28b, 42a, 42b Second resin impregnated fiber bundle, 30 Widening roller, 32, 44 Fiber bundle, 34 fibers Guide part, 46 Yarn feeding guide.

Claims (4)

A high-pressure tank manufacturing method for manufacturing a high-pressure tank having a liner and a reinforcing layer including a fiber layer in which fibers are wound around an outer surface of the liner,
Using at least one first resin-impregnated fiber bundle in which a fiber bundle is impregnated with a matrix resin and at least two second resin-impregnated fiber bundles in which the fiber bundle is impregnated with a matrix resin, the first resin-impregnated fiber A fiber layer forming step of disposing the second resin-impregnated fiber bundle on both ends of the bundle and winding the fiber bundle around the outer surface of the liner to form a fiber layer;
A curing step for curing the matrix resin;
Including
In the fiber layer forming step,
(1) A method of making the curing temperature of the matrix resin contained in the first resin-impregnated fiber bundle higher than the curing temperature of the matrix resin contained in the second resin-impregnated fiber bundle, and
(2) A method in which the tension of the fiber when the first resin-impregnated fiber bundle is wound around the outer surface of the liner is lower than the tension of the fiber when the second resin-impregnated fiber bundle is wound around the outer surface of the liner,
A method for producing a high-pressure tank using at least one of the above. It is a manufacturing method of the high-pressure tank according to claim 1,
A high-pressure tank characterized in that a fiber layer is formed by winding a fiber bundle around an outer surface of the liner by arranging the second resin-impregnated fiber bundle so as to overlap a part of both ends of the first resin-impregnated fiber bundle. Manufacturing method. A high-pressure tank manufacturing apparatus for manufacturing a high-pressure tank having a liner and a reinforcing layer including a fiber layer in which fibers are wound around an outer surface of the liner,
At least one first resin-impregnated fiber bundle supply means for supplying a first resin-impregnated fiber bundle obtained by impregnating the fiber bundle with a matrix resin;
At least two second resin-impregnated fiber bundle supply means for supplying a second resin-impregnated fiber bundle in which the fiber bundle is impregnated with a matrix resin;
Have,
Tension control means for lowering the tension of the fiber when the first resin-impregnated fiber bundle is wound around the outer surface of the liner to be lower than the tension of the fiber when the second resin-impregnated fiber bundle is wound around the outer surface of the liner;
Further comprising a,
Wherein at least one of the first resin-impregnated fiber bundle supply means, said at least two with the second resin-impregnated fiber bundle supply means at the same time, using a pre-Symbol tension control hand stage, both ends of the first resin-impregnated fiber bundle An apparatus for manufacturing a high-pressure tank, wherein the second resin-impregnated fiber bundle is disposed on a side and the fiber bundle is formed by winding the fiber bundle around an outer surface of the liner. With liner,
The outer surface of the liner is arranged such that at least one second resin-impregnated fiber bundle including the fiber bundle and the matrix resin is disposed on both ends of the at least one first resin-impregnated fiber bundle including the fiber bundle and the matrix resin. A reinforcing layer configured to include a wound fiber layer;
Have
A high-pressure tank, wherein the curing temperature of the matrix resin contained in the first resin-impregnated fiber bundle is higher than the curing temperature of the matrix resin contained in the second resin-impregnated fiber bundle.

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