JP2012042032A - High pressure gas tank, its manufacturing method and manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the generation of noise when high-pressure gas permeates a high pressure gas tank.SOLUTION: A rigidity reinforcing carbon fiber is wound to the external periphery of a liner of a resin vessel by an FW method, and a fiber reinforcing resin layer impregnated with a heat-curable resin is formed. When forming the fiber reinforcing resin layer, when winding the carbon fiber by the FW method to form the outermost surface layer and a plurality of layers prior to the outermost surface layer, the carbon layer impregnated with the heat-curable resin is heated and wound. After that, the heat-curable resin is heated by a heat curing device and heat-cured.

Description

  The present invention relates to a high-pressure gas tank and its manufacture.

  High-pressure gas tanks are roughly classified into those using a metal container as a liner and those using a resin container as a liner. For example, in a vehicle driven by combustion energy of fuel gas or electric energy generated by an electrochemical reaction of the fuel gas, the weight of the tank is reduced due to the fact that it is equipped with a high-pressure gas tank in which fuel gas such as natural gas or hydrogen is stored. Therefore, a tank using a resin container as a liner is often used. In such tanks, strength reinforcement fibers impregnated with a thermosetting resin such as an epoxy resin by a tank filament winding method (hereinafter also referred to as “FW method”) to cope with gas filling and storage at high pressure. Is wound several times around the outer periphery of the liner to form a multi-layered reinforcing layer (fiber reinforced resin layer) to improve tank strength (Patent Document 1). The thermosetting resin used for forming the fiber reinforced resin layer on the outer periphery of the liner is thermoset by heat applied during the thermosetting, and functions as an adhesive when the thermosetting occurs. The rotated strength reinforcing fibers are bonded to each other to obtain a fiber reinforced resin layer.

JP 2008-169893 A

  By the way, when winding the reinforcing fiber for forming the above-mentioned fiber reinforced resin layer on the outer periphery of the liner, the fiber is tensioned and wound on the liner so that the thermosetting resin is Emits on the surface. For this reason, in the outermost surface layer of the fiber reinforced resin layer, the raised thermosetting resin becomes rich. For this reason, in the manufactured high-pressure tank, a resin thermosetting layer obtained by thermosetting a thermosetting resin is easily formed on the outermost surface layer of the fiber reinforced resin layer covering the liner.

  In such a high-pressure gas tank, when a resin container is used as a liner for weight reduction, the gas stored in the high-pressure gas tank may be slightly permeated through the liner because it is filled with high pressure. In particular, when the gas stored in the high-pressure gas tank is a gas having a low molecular weight such as hydrogen, the gas can easily pass through the liner of the resin container. The gas that has passed through the liner also permeates the fiber reinforced resin layer, stays at the interface between the fiber reinforced resin layer and the resin thermosetting layer that is the outermost surface layer, peels off this interface, and further stays there. The pressure of the gas causes cracks in the resin thermosetting layer. Such cracks in the resin thermosetting layer do not directly reduce the performance of the high-pressure gas tank, but abnormal noise may occur when the resin thermosetting layer cracks. In some cases, the user feels uncomfortable or uncomfortable.

  The present invention has been made in order to solve at least a part of the above-described problems. In a high-pressure gas tank having a fiber-reinforced resin layer impregnated with a thermosetting resin on the outer periphery of a liner of a resin container, the high-pressure gas is a high-pressure gas. It aims at suppressing generation | occurrence | production of the noise at the time of permeate | transmitting a gas tank.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the following configuration is adopted.

[Application 1: Manufacturing method of high-pressure gas tank]
A method for manufacturing a high-pressure gas tank, comprising:
A fiber reinforced resin layer forming step of forming a fiber reinforced resin layer by winding a strength reinforcing fiber impregnated with a curable resin having a property of being cured by receiving a predetermined treatment around the outer periphery of the liner using a resin container as a liner; ,
A curing step of curing the curable resin by performing the predetermined treatment on the fiber reinforced resin layer formed on the outer periphery of the liner;
In the fiber reinforced resin layer forming step, the impregnated curable resin is subjected to the predetermined treatment in the winding of the strength reinforcing fiber forming at least the outermost surface layer of the fiber reinforced resin layer, and the curable resin is cured. The gist of the invention is to wind the strength reinforcing fiber in a state in which is advanced.

[Application 2: High pressure gas tank manufacturing equipment]
An apparatus used for the manufacture of a high-pressure gas tank having a fiber reinforced resin layer made of a strength reinforcing fiber that has been cured by impregnating a curable resin having a property of being cured by receiving a predetermined treatment on the outer periphery of the liner using a resin container as a liner There,
A fiber reinforced resin layer forming means for forming the fiber reinforced resin layer by winding the strength reinforcing fiber impregnated with the curable resin before receiving the predetermined treatment around an outer periphery of the liner;
A curing means for curing the curable resin by performing the predetermined treatment on the fiber reinforced resin layer formed on the outer periphery of the liner;
Fiber winding pre-curing means for performing the predetermined treatment on the curable resin in the strength reinforcing fiber before reaching the outer periphery of the liner to advance the curing of the curable resin;
The fiber winding pre-curing means is controlled to perform the predetermined treatment by the fiber winding pre-curing means when winding the strength reinforcing fiber forming at least the outermost surface layer of the fiber reinforced resin layer. The gist is to include a pre-winding curing control means.

  In the manufacturing method and the manufacturing apparatus for a high-pressure gas tank having the above-described configuration, a thermosetting resin that is cured by receiving a predetermined treatment, for example, a heat treatment, and forming a fiber reinforced resin layer on the outer periphery of the liner of the resinous container. In the case of a fiber reinforced resin layer made of strength reinforcing fibers impregnated and cured, the fiber reinforced resin layer is cured by lowering the viscosity of the thermosetting resin and curing it through subsequent heat treatment. In the manufacturing method and the manufacturing apparatus of the high-pressure gas tank having the above-described configuration, the curable resin (thermosetting resin) is subjected to a predetermined process (heating process) when winding the strength reinforcing fiber forming at least the outermost surface layer of the fiber reinforced resin layer. To leave the cured state. Therefore, since the lowering of the viscosity of the curable resin in the predetermined treatment (heat treatment) after the formation of the fiber reinforced resin layer is suppressed, the strength reinforcement adjacent to each other by being wound to form at least the outermost surface layer of the fiber reinforced resin layer. Between the fibers for use, it is prevented from being filled with the curable resin. In other words, at least in the fiber reinforced resin layer other than the outermost surface layer, the curing of the curable resin similar to that in the existing tank occurs after the viscosity is reduced by heating, and is wound adjacent to the fiber reinforced resin layer so as to form at least the outermost surface layer. Between the matching strength reinforcing fibers, the curable resin is cured without filling the space. In this case, between the adjacent strength reinforcing fibers wound so as to form at least the outermost surface layer of the fiber reinforced resin layer is along the winding trajectory of the strength reinforcing fiber. In the outermost surface layer, cracks are formed along the trajectory of the winding of the reinforcing fiber. As a result, according to the manufacturing method and the manufacturing apparatus of the high-pressure gas tank having the above-described configuration, it is possible to easily manufacture a high-pressure gas tank having cracks along the trajectory of the strength reinforcing fiber wound on the outermost surface layer of the fiber reinforced resin layer. .

[Application 3: High-pressure gas tank]
A high pressure gas tank,
A liner for a resin container;
The outer periphery of the liner is provided with a fiber reinforced resin layer made of strength reinforcing fibers impregnated with a curable resin that is cured by receiving a predetermined treatment,
The gist of the fiber reinforced resin layer is that the outermost surface layer has a crack along the trajectory of the winding of the strength reinforcing fiber.

  Even in a high-pressure gas tank having the above-described configuration, the stored high-pressure gas can permeate the liner and the fiber reinforced resin layer permeate around the liner, and the gas can stay at the interface between the fiber reinforced resin layer and the outermost surface layer. However, in the high-pressure gas tank having the above-described configuration, since the outermost surface layer of the fiber reinforced resin layer has a crack along the winding trajectory of the strength reinforcing fiber, the gas stays at the interface between the fiber reinforced resin layer and the outermost surface layer. If a crack has reached the location, this crack becomes a leak path that discharges gas, and the staying gas can be discharged from the crack (leak path), and at this time, it is possible to prevent the generation of noise due to the occurrence of the crack. In addition, even if the crack does not reach the gas retention location, the crack and the gas retention location are close to each other, so that the residual gas permeates from the retention location to the crack, and the crack due to the retention gas also falls within a small range. Therefore, the abnormal noise accompanying crack generation is also reduced. Therefore, according to the high-pressure gas tank having the above-described configuration, it is possible to suppress the user's discomfort and discomfort in the high-pressure gas tank.

It is explanatory drawing which shows typically the manufacturing process of the high pressure gas tank as one Example of this invention. It is explanatory drawing which shows typically the mode of the fiber winding by FW method in a tank manufacturing process. It is explanatory drawing which shows typically the fiber winding mechanism part 100 of the tank manufacturing apparatus 150 seeing from a tank cross section view direction. It is explanatory drawing which shows typically the fiber winding mechanism part 100 seeing from a tank longitudinal direction. It is explanatory drawing which shows typically the external appearance of the high pressure gas tank 10 with a partially broken enlarged view.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view schematically showing a manufacturing process of a high-pressure gas tank as one embodiment of the present invention, FIG. 2 is an explanatory view schematically showing a state of fiber winding by the FW method in the tank manufacturing process, and FIG. FIG. 4 is an explanatory diagram schematically showing the fiber winding mechanism 100 of the tank manufacturing apparatus 150 as viewed from the tank cross-sectional view direction, and FIG. 4 is an explanatory diagram schematically showing the fiber winding mechanism 100 as viewed from the tank longitudinal direction. . In this embodiment, the high-pressure gas tank is a high-pressure hydrogen tank that stores high-pressure hydrogen.

  In the tank manufacturing process of this embodiment, first, as shown in FIG. 1A, a resin container is prepared as a liner 10a. As shown in FIG. 2, the liner 10 a which is the main body portion of the high-pressure gas tank 10 includes a substantially cylindrical cylinder portion 11 having a uniform radius, and a convex curved dome portion 12 provided at both ends of the cylinder portion 11. Is a hollow container. In this embodiment, for example, a resin container made of a nylon resin is used as the liner 10a. However, a resin container made of another resin may be used. The dome portion 12 is configured by an isotensive curved surface, and has a base 15 for connecting to an external pipe or the like at the apex thereof.

  Next, as shown in FIG.1 (b), the fiber reinforced resin layer 20 is formed in the outer periphery of the liner 10a (fiber reinforced resin layer formation process). In this embodiment, as a fiber reinforced resin layer forming step, a strength reinforcing carbon fiber impregnated with an epoxy resin as a thermosetting resin is repeatedly wound around the outer periphery of the liner 10a by a filament winding method (FW method). By doing so, the primary carbon fiber layer which hits the inner peripheral side resin layer of the fiber reinforced resin layer 20 is formed (FIG. 1B-1). As shown in FIG. 2, the fiber winding by the FW method is hoop winding in the substantially cylindrical cylinder portion 11 of the liner 10a, and the dome portion 12 at both ends of the cylinder portion has an angle corresponding to the folding position. Helical winding. The fiber reinforced resin layer 20 is formed in multiple layers by laminating a plurality of fiber winding layers in which the carbon fiber F is wound.

  As shown in FIG. 2 (a), in the cylinder part 11, a fiber wound layer for reinforcement is formed by repeating hoop winding while turning back both ends of the cylinder part. That is, a reinforcing fiber winding layer is formed by reciprocating the reel 25 of carbon fiber F at a predetermined speed along the tank center axis AX while rotating the liner 10a around the tank center axis AX. . This hoop winding is performed by adjusting the liner rotation speed and the reciprocation speed of the reel 25 so that the carbon fiber F has a winding angle almost perpendicular to the tank center axis AX of the cylinder portion 11 and then the tank center axis. This is a winding method in which the reel 25 is reciprocated along the AX direction to wind the carbon fiber F around the cylinder portion 11. The fiber wound layer formed by this hoop winding is hereinafter referred to as a hoop layer. The hoop layer is formed over the entire cylinder portion 11 and serves to reinforce the liner in the cylinder portion 11.

  In this way, following the formation of the hoop layer of the cylinder portion 11, the dome portion 12 is reinforced by repeatedly performing the high-angle helical winding shown in FIG. 2B and the low-angle helical winding shown in FIG. A fiber wound layer is formed. In the high-angle helical winding shown in FIG. 2B, the liner 10a is rotated around the center axis AX of the tank with the upper side of the hoop layer and the peripheral region of the dome 12 connected to the cylinder 11 as the fiber winding target. The carbon fiber F extending from the reel 25 is kept crossed at a high fiber angle with respect to the tank center axis AX, and the liner rotational speed and the reciprocating speed of the reel 25 are adjusted. Then, the reel 25 is reciprocated along the tank central axis AX direction to wind the carbon fiber F in a spiral shape. In this case, in the dome portions 12 on both sides, the fiber winding direction is folded back along with the forward / return switching of the reel 25, and the folding position from the tank center axis AX is also adjusted. By repeating the wrapping of the dome portion 12 in the winding direction many times, a fiber wound layer in which the carbon fibers F are stretched in a mesh shape with a high angle fiber angle is formed on the outer surface of the liner 10a. The fiber wound layer formed by this high angle helical winding is hereinafter referred to as a high angle helical layer.

  In the low-angle helical winding shown in FIG. 2 (c), the fiber winding target is set on the hoop layer and the high-angle helical layer and the top region of the dome portion 12 around the base 15, and the liner 10a is placed on the tank center axis AX. While rotating around, the carbon fiber F extended from the reel 25 is kept crossed at a low fiber angle with respect to the tank center axis AX, and the liner rotational speed and the reciprocating speed of the reel 25 are adjusted. Then, the reel 25 is reciprocated along the tank central axis AX direction to wind the carbon fiber F in a spiral shape. In this case, in the dome portions 12 on both sides, the fiber winding direction is folded back along with the forward / return switching of the reel 25, and the folding position from the tank center axis AX is also adjusted. By repeating the wrapping in the winding direction in the dome portion 12 many times, a fiber wound layer in which the carbon fibers F are stretched in a mesh shape at a low angle fiber angle is formed on the outer surface of the liner 10a. The fiber wound layer formed by this low-angle helical winding is hereinafter referred to as a low-angle helical layer. The fiber angle at this time is set to a relatively small fiber angle so that the winding direction is folded back at the dome portion 12 before the carbon fiber F makes one round in the cylinder portion 11. The high angle helical layer and the low angle helical layer described above bear the liner reinforcement in the dome portion 12.

  When the primary carbon fiber layer corresponding to the inner peripheral resin layer of the fiber reinforced resin layer 20 is formed (FIG. 1 (b-1)), all the fiber reinforced resin layers 20 are wound by winding the carbon fibers F. This is performed on the fiber wound layer excluding the outermost surface layer of the fiber reinforced resin layer 20 and a plurality of fiber wound layers of about 2 to 10 layers before that. And the winding of this carbon fiber F is performed in order of hoop layer formation, high angle helical layer formation, and low angle helical layer formation, as shown in FIG.

  Following the formation of the primary carbon fiber layer corresponding to the inner peripheral resin layer of the fiber reinforced resin layer 20, the outer periphery of the primary carbon fiber layer is further impregnated with an epoxy resin as a thermosetting resin by the FW method. By repeatedly winding the carbon fiber F while heating, the outermost surface layer of the fiber reinforced resin layer 20 and the fiber winding layer (secondary carbon fiber layer) having the above-mentioned number of turns before that are formed into a fiber reinforced resin layer. It overlaps and forms on the 20 inner peripheral side resin layer (FIG.1 (b-2)). The primary carbon fiber layer and the secondary carbon fiber layer overlapped in this way become the fiber reinforced resin layer 20.

  In this example, the carbon fiber F was wound while being heated when forming the secondary carbon fiber layer as follows. As shown in FIGS. 3 and 4, the fiber winding mechanism unit 100 includes a fiber heating device 110, a reel mechanism unit 120, and a control device 130. The fiber heating device 110 includes a heater 112 so as to sandwich the carbon fiber F wound around the liner 10a, receives the control signal from the control device 130, turns on the heater 112, and heats the carbon fiber F. To do. The fiber heating device 110 reciprocates along the tank center axis AX together with the reel mechanism 120. The reel mechanism unit 120 is configured to wind the carbon fiber F before heating by the fiber heating device 110, that is, during the formation of the primary carbon fiber layer described above, and the carbon fiber F under heating by the fiber heating device 110. In winding, the carbon fiber F is sent out while reciprocating the reel 25 along the tank center axis AX as described above. Since the feed amount of the carbon fiber F from the reel mechanism 120 is proportional to the degree of fiber winding around the outer periphery of the liner 10a by the carbon fiber F, the control device 130 is based on the feed amount of the carbon fiber F. On / off control of the fiber heating device 110 is performed. In other words, during the formation of the primary carbon fiber layer corresponding to the inner peripheral resin layer of the fiber reinforced resin layer 20, the fiber heating device 110 is turned off and the secondary carbon fiber layer is formed on the primary carbon fiber layer. In the meantime, the fiber heating device 110 is turned on.

  In the present embodiment, the carbon fiber F is wound on the outermost surface layer of the fiber reinforced resin layer 20 and several preceding fiber winding layers after the carbon fiber F is heated by the fiber heating device 110 described above. The turns were carried out by hoop winding as shown in FIG. This is because the cylinder portion 11 occupies most of the surface area of the liner 10a, and therefore it is sufficient to cope with gas permeation through the cylinder portion 11. Helical winding covering the dome portion 12 can also be performed in forming the secondary carbon fiber layer. In this embodiment, as shown in the enlarged portion of FIG. 3, a carbon fiber F in which a carbon sliver FS of a plurality of long fibers is used as a core and surrounded by an epoxy resin FR is converted into primary and secondary carbon by the FW method. Wind in the fiber layer. The state of the carbon fiber F when the carbon fiber F is wound while being heated by the fiber heating device 110 will be described later.

  In this embodiment, in forming the primary carbon fiber layer in the fiber reinforced resin layer forming step, the excess epoxy resin impregnated in the carbon fiber F is squeezed with a force that does not cause mechanical damage to the fiber. The carbon fiber F was wound while being removed. By doing so, the amount of the epoxy resin layer that floats from the primary carbon fiber layer to the secondary carbon fiber layer can be reduced to some extent in advance, so that the epoxy resin extends from the primary carbon fiber layer to the lower surface of the secondary carbon fiber layer. However, the epoxy resin does not float from the primary carbon fiber layer to the secondary carbon fiber layer to the extent that it covers the surface of the secondary carbon fiber layer. In this case, a thermosetting resin such as a polyester resin or a polyamide resin can be used instead of the epoxy resin. Moreover, what is necessary is just resin which receives and cures in the below-mentioned thermosetting process.

  Following the formation of the fiber reinforced resin layer, as shown in FIG. 1 (c), the high pressure gas tank 10, which is an intermediate product tank on which the resin layer has been formed, is carried into a thermosetting furnace 140 of the tank manufacturing apparatus 150. Then, the intermediate product tank is heated while rotating to the curing temperature of the epoxy resin (thermosetting step). By this heating, the epoxy resin contained in the fiber reinforced resin layer (primary carbon fiber layer and secondary carbon fiber layer) is thermoset after being reduced in viscosity, and the fibers are bonded to each other to bond the fibers together. The thermoset is formed. The thermosetting furnace 140 includes heating sources at a plurality of locations in the tank axial direction, and heats the outer surface of the tank evenly in the tank axial direction. By passing through cooling curing following this thermosetting step, the high-pressure gas tank 10 in which the liner 10a is reinforced with the fiber reinforced resin layer 20 is obtained. FIG. 5 is an explanatory view schematically showing the appearance of the high-pressure gas tank 10 together with a partially enlarged view.

  As described above, in the manufacturing method of the present embodiment, in forming the fiber reinforced resin layer 20 on the outer periphery of the liner 10a, as shown in the enlarged portion of FIG. About the primary carbon fiber layer 21, the carbon fiber F by which the epoxy resin impregnation which is a thermosetting resin was impregnated was wound, and the primary carbon fiber layer 21 was formed without changing with the existing FW method. Then, the secondary carbon fiber layer 22 that overlaps the primary carbon fiber layer 21 and the outermost surface layer of the fiber reinforced resin layer 20 and several previous fiber winding layers are carbonized by the fiber heating device 110. The fiber F was wound while being heated to form a fiber reinforced resin layer 20 in which the secondary carbon fiber layer 22 overlapped with the primary carbon fiber layer 21. For this reason, the outermost surface layer of the fiber reinforced resin layer 20 and the secondary carbon fiber layer 22 which is a few layers of fiber before that are the epoxy resin surrounding the carbon sliver FS as shown in the enlarged portion of FIG. The FR is wound and formed while being cured by heating. If the carbon fiber F is wound without being heated in this way, the adjacent carbon fiber F is filled with the unheated epoxy resin FR, but the carbon fiber F in which the epoxy resin FR has hardened by heating is used. In the secondary carbon fiber layer 22 formed by winding, a gap remains between the adjacent carbon fibers F.

  After forming the fiber reinforced resin layer 20 including the primary carbon fiber layer 21 and the secondary carbon fiber layer 22 in this way, the fiber reinforced resin layer 20 is subjected to heat treatment. In both the fiber layer 21 and the secondary carbon fiber layer 22, the epoxy resin FR is cured. The primary carbon fiber layer 21 occupying most of the fiber reinforced resin layer 20 undergoes resin curing after sufficiently reducing the viscosity of the epoxy resin FR in the same manner as in the existing tank manufacturing method. On the other hand, in the secondary carbon fiber layer 22 that is the outermost surface layer of the fiber reinforced resin layer 20 and several fiber winding layers before that, since the epoxy resin FR has already been cured, the viscosity is so low. Since the carbon fiber F is further cured without being formed, the space between the adjacent carbon fibers F wound in the secondary carbon fiber layer 22 remains in a streak shape without being completely filled with the epoxy resin FR. Since the space between the adjacent carbon fibers F wound in the secondary carbon fiber layer 22 is along the trajectory of the winding of the carbon fibers F, as shown in FIG. It becomes a streak-like crack HC in the outermost surface layer. That is, according to the manufacturing method of the present embodiment, the high-pressure gas tank 10 having cracks along the winding trajectory of the carbon fiber F on the outermost surface layer of the fiber reinforced resin layer 20 can be easily manufactured.

  The high-pressure gas tank 10 of the present embodiment having the crack HC along the trajectory of the winding of the carbon fiber F on the outermost surface layer of the fiber reinforced resin layer 20 has the following advantages. Even in the high pressure gas tank 10 of the present embodiment, the hydrogen gas stored at high pressure permeates the liner 10a and the fiber reinforced resin layer 20, and the primary carbon fiber layer 21 occupying most of the fiber reinforced resin layer 20 and the outermost layer. Hydrogen gas may stay at the interface of the secondary carbon fiber layer 22 occupying the surface layer. In the high-pressure gas tank 10 of the present embodiment, since the secondary carbon fiber layer 22 occupying the outermost surface layer of the fiber reinforced resin layer 20 has the crack HC along the winding trajectory of the carbon fiber F as described above, If the crack HC reaches the gas staying location at the interface between the secondary carbon fiber layer 21 and the secondary carbon fiber layer 22, the crack HC becomes a leak path for discharging gas, and the staying hydrogen gas is discharged from the crack HC (leak path). In this case, it is possible to prevent the generation of an abnormal noise due to the occurrence of cracks. Further, even if the crack HC does not reach the gas retention location, the crack HC and the gas retention location are close to each other. The noise that accompanies cracking is also reduced. As a result, according to the high-pressure gas tank 10 of the present embodiment, it is possible to suppress the user's discomfort and discomfort in the high-pressure gas tank. The crack HC in the present embodiment includes a leak path and a crack intentionally formed so as to reach the above-mentioned interface in addition to the crack formed along the trajectory of the carbon fiber F by the manufacturing method described above. The presence or absence of cracks HC in the outermost surface layer of the high-pressure gas tank 10 can be determined by a color check method (JIS Z 2343) defined by JIS.

  Further, in the high-pressure gas tank 10 of the present embodiment, the crack HC is provided along the winding locus of the carbon fiber F, so that the carbon fiber F is not broken by the crack HC. Therefore, after reducing the number of turns of the carbon fibers F of the primary carbon fiber layer 21 and the secondary carbon fiber layer 22, it is possible to suppress the uncomfortable feeling as described above.

  Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and can be implemented in various modes without departing from the scope of the present invention. For example, in the above embodiment, the carbon fiber F is used to form the fiber reinforced resin layer 20, but instead of the carbon fiber F, the primary and secondary fiber layers are formed of glass fiber, or the secondary fiber layer is formed. The carbon fiber layer 22 may be a fiber layer formed of glass fiber instead of the carbon fiber F. Since the glass fiber has higher mechanical strength than the carbon fiber F, the mechanical strength of the high-pressure gas tank 10 can be increased. Aramid fibers can also be used.

  In this embodiment, an epoxy resin is used as the thermosetting resin, but other thermosetting resins can also be used. In addition, for the fiber heating device 110 that heats the carbon fiber F before winding, a heating method such as hot air, infrared rays, and microwaves can be used instead of the heater 112.

  In addition, a resin instead of a thermosetting resin, for example, a photocurable resin that cures when irradiated with ultraviolet rays, or a curable resin that cures when subjected to a humidity adjustment treatment or a pressure adjustment treatment can be used. In the carbon fiber F, as shown in FIG. 3, the carbon sliver FS is used as a core and the fiber is surrounded by the epoxy resin FR, and the carbon sliver FS is arranged in a belt shape and surrounded by the epoxy resin FR. F can also be used.

DESCRIPTION OF SYMBOLS 10 ... High pressure gas tank 10a ... Liner 11 ... Cylinder part 12 ... Dome part 15 ... Base 20 ... Fiber reinforced resin layer 21 ... Primary carbon fiber layer 22 ... Secondary carbon fiber layer 25 ... Reel 100 ... Fiber winding mechanism part 110 ... Fiber heating device 112 ... Heating heater 120 ... Reel mechanism part 130 ... Control device 140 ... Thermosetting furnace 150 ... Tank manufacturing device F ... Carbon fiber AX ... Tank central axis HC ... Crack FR ... Epoxy resin FS ... Carbon sliver

Claims (4)

A method for manufacturing a high-pressure gas tank, comprising:
A fiber reinforced resin layer forming step of forming a fiber reinforced resin layer by winding a strength reinforcing fiber impregnated with a curable resin having a property of being cured by receiving a predetermined treatment around the outer periphery of the liner using a resin container as a liner; ,
A curing step of curing the curable resin by performing the predetermined treatment on the fiber reinforced resin layer formed on the outer periphery of the liner;
In the fiber reinforced resin layer forming step, the impregnated curable resin is subjected to the predetermined treatment in the winding of the strength reinforcing fiber forming at least the outermost surface layer of the fiber reinforced resin layer, and the curable resin is cured. A method of manufacturing a high-pressure gas tank that winds the strength-reinforcing fiber in a state in which is advanced.   2. The high pressure according to claim 1, wherein the curable resin is a thermosetting resin that is cured by being subjected to a heat treatment, and in the curing step, the fiber reinforced resin layer is subjected to a heat treatment to thermally cure the curable resin. Gas tank manufacturing method. An apparatus used for the manufacture of a high-pressure gas tank having a fiber reinforced resin layer made of a strength reinforcing fiber that has been cured by impregnating a curable resin having a property of being cured by receiving a predetermined treatment on the outer periphery of the liner using a resin container as a liner There,
A fiber reinforced resin layer forming means for forming the fiber reinforced resin layer by winding the strength reinforcing fiber impregnated with the curable resin before receiving the predetermined treatment around an outer periphery of the liner;
A curing means for curing the curable resin by performing the predetermined treatment on the fiber reinforced resin layer formed on the outer periphery of the liner;
Fiber winding pre-curing means for performing the predetermined treatment on the curable resin in the strength reinforcing fiber before reaching the outer periphery of the liner to advance the curing of the curable resin;
The fiber winding pre-curing means is controlled to perform the predetermined treatment by the fiber winding pre-curing means when winding the strength reinforcing fiber forming at least the outermost surface layer of the fiber reinforced resin layer. An apparatus for manufacturing a high-pressure gas tank, comprising a pre-winding curing control means. A high pressure gas tank,
A liner for a resin container;
The outer periphery of the liner is provided with a fiber reinforced resin layer made of strength reinforcing fibers impregnated with a curable resin that is cured by receiving a predetermined treatment,
The fiber reinforced resin layer has a crack along the trajectory of winding of the strength reinforcing fiber in the outermost surface layer thereof.

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