JP2021014019A - Method for manufacturing tank - Google Patents

Abstract

To provide a method for manufacturing a tank capable of preventing peeling of a fixed fiber bundle while easily fixing an end portion of the fiber bundle to an outer peripheral surface of a liner.SOLUTION: A method for manufacturing a tank 10 is a method for manufacturing the tank 10 by winding a plurality of fiber bundles F impregnated with a thermosetting resin on an outer peripheral surface of a liner 11 having a space filled with gas. This manufacturing method comprises of a cutting step of cutting the fiber bundle F, when winding of a fiber bundle F impregnated with the thermosetting resin is completed, a pasting step of pasting an end portion E of the cut fiber bundle F to the fiber bundle F wound around the liner 11, a fixing step of heating the pasted end portion E by a far-infrared heater 40 to be fixed, and a thermosetting step of thermosetting the thermosetting resin impregnated in the fiber bundle F wound around the liner 11.SELECTED DRAWING: Figure 4

Description

The present invention relates to a method for manufacturing a tank in which a fiber bundle impregnated with a thermosetting resin is wound around an outer peripheral surface of a liner to manufacture a tank.

Conventionally, as a technique in such a field, for example, the filament winding method described in Patent Document 1 below is known. The winding method described in Patent Document 1 has a first step of fixing the start end of the fiber bundle to the outer peripheral surface of the liner at the start position of hoop winding, a second step of performing hoop winding, and an end position of hoop winding. It includes a third step of fixing the end of the fiber bundle to the outer peripheral surface of the liner. Then, in the third step, the end portion of the fiber bundle is crimp-fixed to the outer peripheral surface of the liner using the iron 80 shown in FIG. 6 (c). More specifically, in a state where the heating portion 81, which is the tip portion of the iron 80, is pressed against the outer peripheral surface of the liner at the end portion of the fiber bundle (see the arrow in FIG. 6C for the pressing direction), 200 ° C. to Heat at a temperature of 300 ° C. for several minutes. As a result, the thermosetting resin impregnated in the fiber bundle is heat-cured, and the end portion of the fiber bundle is pressure-bonded and fixed to the already wound fiber bundle.

Japanese Patent No. 5678979

However, in the case of the above-mentioned crimp fixing method using a trowel, there is a possibility that the end portion of the fiber bundle and the fiber bundle around it may stick to the trowel by crimp heating. Then, when the iron is pulled apart after heating, the fiber bundle attached to the iron is peeled off from the outer peripheral surface of the liner, which causes a problem that the end portion of the fiber bundle is insufficiently fixed.

The present invention has been made to solve such a technical problem, and it is possible to prevent the fixed fiber bundle from peeling off while easily fixing the end portion of the fiber bundle to the outer peripheral surface of the liner. It is an object of the present invention to provide a method for manufacturing a tank.

The method for manufacturing a tank according to the present invention is a method for manufacturing a tank in which a tank is manufactured by winding a plurality of fiber bundles impregnated with a thermosetting resin around an outer peripheral surface of a liner having a space filled with gas. Therefore, when the winding of the fiber bundle impregnated with the thermosetting resin is completed, the cutting step of cutting the fiber bundle and the fiber bundle in which the end portion of the cut fiber bundle is wound around the liner. The sticking step of sticking to the liner, the fixing step of heating the pasted end portion with far infrared rays and fixing to the fiber bundle wound around the liner, and the heat impregnated in the fiber bundle wound around the liner. It is characterized by including a thermosetting step of thermosetting the curable resin.

In the method for manufacturing a tank according to the present invention, at the end of winding the fiber bundle, the end of the cut fiber bundle is attached to the fiber bundle wound around the liner, and then heated by far infrared rays to form the fiber bundle. The end is fixed to the fiber bundle wound around the liner. As a result, the end portion of the fiber bundle can be easily fixed to the outer peripheral surface of the liner. Moreover, since heating by far infrared rays can be performed in a non-contact manner with the end portion of the fiber bundle as compared with the conventional crimp fixing with a trowel, it is possible to prevent the fixed fiber bundle from being peeled off by pulling the trowel apart as in the conventional case. ..

According to the present invention, it is possible to easily fix the end portion of the fiber bundle to the outer peripheral surface of the liner and prevent the fixed fiber bundle from peeling off.

It is a perspective view which shows the tank. It is a process drawing which shows the manufacturing method of the tank which concerns on embodiment. (A) is a perspective view showing that a reinforcing layer is formed by helical winding on the outer peripheral surface of the liner, and (b) is a perspective view showing that a reinforcing layer is formed by hoop winding on the outer peripheral surface of the liner. (A) is a schematic plan view showing a fiber bundle fixing device, and (b) is a schematic side view showing a fiber bundle fixing device. It is a schematic diagram which shows that the end part of a fiber bundle is fixed by the conventional manual weaving method, (a) shows the state which put the dummy yarn in the reinforcing layer, and (b) reinforces the dummy yarn. The state of being pulled from the layer is shown, (c) shows the state in which the end portion of the pulled fiber bundle is embedded in the reinforcing layer, and (d) shows the side view of the liner as seen from the AA direction of (c). .. It is a figure of the manufacturing method of the conventional tank, (a) shows the side view of the needle sticking device which fixes the end part of a fiber bundle by the entanglement method by needle sticking, (b) is the needle sticking device which stuck in a reinforcing layer. An enlarged cross-sectional view of the tip portion of the needle is shown, and (c) shows a method of fixing the end portion of the fiber bundle by a crimping method using a trowel.

Hereinafter, embodiments of the tank manufacturing method according to the present invention will be described with reference to the drawings, but before that, the structure of the tank will be briefly described with reference to FIG.

FIG. 1 is a perspective view showing a tank. The tank 10 is, for example, a high-pressure tank mounted on a fuel cell vehicle, and has a liner 11 having a space filled with hydrogen gas, caps 12 and 13 attached to both ends of the liner 11, and an outer peripheral surface of the liner 11. It is provided with a reinforcing layer 14 formed in.

The liner 11 has a gas barrier property against hydrogen gas, and is a hollow container having a substantially cylindrical body portion 15 and substantially hemispherical dome portions 16 and 17 arranged at both left and right ends of the body portion 15. Is. The liner 11 is integrally formed by a rotation / blow molding method using, for example, a resin member such as polyethylene or nylon. Further, the liner 11 may be formed of a light metal such as aluminum instead of the resin member. Further, the liner 11 may be formed by joining a plurality of divided members by injection / extrusion molding or the like, instead of the integral molding manufacturing method such as the rotation / blow molding method.

Openings (not shown) are formed at the tops of the dome portions 16 and 17, respectively, and the above-mentioned caps 12 and 13 are attached to the openings. Specifically, as shown in FIG. 1, a base 12 is inserted in the opening of the dome portion 16 on the left side, and a base 13 is inserted in the opening of the dome portion 17 on the right side. The base 12 functions as, for example, a valve side base, and the base 13 functions as, for example, an end side base. These bases 12 and 13 are formed in a cylindrical shape by a metal material, one end thereof is inserted into the openings of the dome portions 16 and 17, and the other end portion is from the dome portions 16 and 17 to the axis CL of the liner 11. It protrudes outward along the direction.

The reinforcing layer 14 is formed by winding a plurality of fiber bundles F around the outer peripheral surface of the liner 11. The fiber bundle F is formed of a composite material in which carbon fiber, glass fiber, aramid fiber, or the like is put in plastic to improve the strength. In the present embodiment, for example, two types of fiber bundles F are used, and a carbon fiber bundle impregnated with a thermosetting resin wound around the outer peripheral surface of the liner 11 and further wound around the outer periphery of the carbon fiber bundle. It is a glass fiber bundle impregnated with a thermosetting resin.

The fiber bundle F is composed of a fiber bundle in which several tens to several hundreds of so-called multifilaments, which are obtained by twisting dozens of single fibers into one thread, are bundled. The reinforcing layer 14 is formed, for example, by a filament winding device (Filament Winding Process, hereinafter referred to as a FW device) (not shown). In the FW device, a thick fiber bundle F is stretched and thinned, and a sweet twist is applied to form a coarse yarn, and the wound so-called crude yarn (roving such as carbon roving and glass roving) is impregnated with resin or resin. This is a manufacturing apparatus in which tension is applied to the coarsely spun yarn impregnated with the above and continuously wound around the tank 10. Here, examples of the resin to be impregnated include thermosetting resins such as epoxy resin (EP), polyester resin (PE), and polyamide resin (PA).

Hereinafter, a method for manufacturing a tank according to the present embodiment will be described. As shown in FIG. 2, the method for manufacturing the tank 10 includes a preparation step S1 for preparing the liner 11 and the fiber bundle F, a winding step S2 for winding a plurality of fiber bundles F around the liner 11, and after the winding is completed. The cutting step S3 for cutting the fiber bundle F, the pasting step S4 for pasting the end portion of the cut fiber bundle F to the fiber bundle F wound around the liner 11, and the end portion of the pasted fiber bundle F are fixed. The fixing step S5 and the heat curing step S6 for heat-curing the wound fiber bundle F are included.

First, in the preparation step S1, the liner 11 and the fiber bundle F are prepared. Specifically, for example, as described above, the liner 11 is manufactured by the rotation / blow molding method to prepare the resin liner 11. A bobbin around which a fiber bundle F impregnated with a thermosetting resin is wound is prepared at the same time as or before and after the preparation work of the liner 11. Next, a plurality of bobbins around which the fiber bundle F is wound are set in the FW device so that the FW device can be operated.

In the winding step S2 following the preparation step S1, a plurality of fiber bundles F are wound around the outer peripheral surface of the liner 11 by using a FW device. The FW device includes a fiber bundle winding mechanism (not shown) having a shaft support portion that pivotally supports the bases 12 and 13 of the liner 11 and a rotation drive portion that rotates the liner 11 around the axis CL. The fiber bundle winding mechanism sequentially winds the fiber bundle F on the outer peripheral surface of the liner 11 in cooperation with the reciprocating movement in which the fiber bundle F is reciprocated along the axis CL direction of the liner 11 and the rotation of the liner 11. And stack.

In the fiber bundle winding mechanism, the reciprocating speed (m / sec) of the fiber bundle F along the axis CL direction of the liner 11 and the rotation speed (rpm) of the liner 11 are controlled by a control unit (not shown). As a result, the winding method of the fiber bundle F is configured to be switched between helical winding and hoop winding.

As shown in FIG. 3A, the helical winding means that the angle θ (so-called winding angle θ) formed by the axis CL of the liner 11 and the winding direction of the fiber bundle F is 0 ° <θ <90 °. In addition, it is a method of spirally winding the fiber bundle F. This helical winding is further divided into a low angle helical winding and a high angle helical winding according to the magnitude of the winding angle θ. The low-angle helical winding is a helical winding when the winding angle θ is small (for example, 0 ° <θ ≦ 30 °), and the fiber bundles in the dome portions 16 and 17 before the fiber bundle F goes around the axis of the liner 11 This is a winding method in which folding in the winding direction of F occurs.

The high-angle helical winding is a helical winding when the winding angle θ is large (for example, 30 ° <θ <90 °), and the fuselage is wound before the fiber bundles F in the dome portions 16 and 17 are folded back in the winding direction. This is a winding method in which the fiber bundle F goes around the axis of the liner 11 at least in the portion 15. Note that FIG. 3A shows a low-angle helical winding.

On the other hand, in hoop winding, as shown in FIG. 3B, the fiber bundle F is wound on the liner 11 so that the winding angle θ formed by the axis CL of the liner 11 and the winding direction of the fiber bundle F is substantially vertical. It is a method of winding in the circumferential direction of. Here, "substantially vertical" means including both 90 ° and an angle of about 90 ° that can be generated by shifting the winding position of the fiber bundles F so that the fiber bundles F do not overlap each other. ..

The cutting step S3 following the winding step S2 is a step performed when the winding of the fiber bundle F is completed. For example, when the fiber bundle F is wound to the required thickness and the winding operation is completed, the fiber bundle F wound around the bobbin by cutting and the fiber bundle F wound around the liner 11 are separated. Then, by cutting, a terminal portion E is formed in the fiber bundle F.

In the sticking step S4 following the cutting step S3, the end portion E of the cut fiber bundle F is stuck to the fiber bundle F wound around the liner 11. Specifically, for example, an operator pushes the roller along the circumferential direction of the tank 10 while pressing a constant load on the outer periphery of the tank 10 with the end portion E of the fiber bundle F cut using a roller (not shown). By sliding in a straight line, the end portion E is attached to the fiber bundle F wound around the liner 11. In the sticking step S4, in addition to the roller sliding work by the operator, the roller sliding work by the automatic machine may be adopted.

The fixing step S5 following the sticking step S4 is performed by the fiber bundle fixing device 20. Hereinafter, the structure of the fiber bundle fixing device 20 will be briefly described with reference to FIG.

As shown in FIG. 4, the fiber bundle fixing device 20 includes a work table 21, a back side plate 22, a carry-in side plate 23, a carry-out side plate 24, a top plate 25, an automatic shutter 26, and a work transfer unit. It is composed of 30, a far-infrared heater 40, and a slide unit 50. The work accommodating chamber R is formed by the work table 21, the back side plate 22, the carry-in side plate 23, the carry-out side plate 24, the top plate 25, and the automatic shutter 26. Although not shown, the carry-in side plate 23 is provided with a carry-in door for carrying in the tank 10, and the carry-out side plate 24 is provided with a carry-out door for carrying out the tank 10. As a result, the tank 10 as a work can be carried in or out of the work storage chamber R.

The work table 21 is composed of a rear support column 21a installed on the floor K, a front side support column 21b, and a mounting table 21c supported by the back side support column 21a and the front side support column 21b and having a flat upper surface. .. The height from the floor K to the upper surface of the mounting table 21c is formed to be substantially the same as the height from the floor K of the worker M to the knees. The back surface, front surface, and upper surface here indicate the positional relationship of each component as seen by the operator M.

The back side plate 22 is located above the back support column 21a and is fixed to the upper surface of the work table 21, and the carry-in side plate 23 is fixed to the upper surface of the work table 21 on the carry-in side of the work storage chamber R and is carried out. The side plate 24 is fixed to the upper surface of the work table 21 on the carry-out side of the work accommodating chamber R. As shown in FIG. 4B, the top plate 25 covers the upper side of the work accommodating chamber R and is fixed to the back side plate 22, the carry-in side plate 23, and the carry-out side plate 24 from the head of the worker M. It is configured to be slightly higher.

The automatic shutter 26 is provided between the mounting table 21c of the work table 21 and the top plate 25 on the side facing the back side plate 22, and is automatically opened during the work of the worker M and automatically at the end of the work. It is configured to be closed.

The work transfer unit 30 has a pallet 30a on which the tank 10 is placed, and a pair of support blocks 30b that support the base 12 and the base 13 of the tank 10 mounted on the pallet 30a. The work transfer unit 30 is configured to convey the pallet 30a and carry it in and out of the work accommodating chamber R. As shown in FIG. 4A, the pallet 30a carried into the work accommodating chamber R is configured to be stationary at the central position of the work accommodating chamber R.

The far-infrared heater 40 includes a main body 40a fixed to the slide unit 50, a support 40b extending from the main body 40a toward the tank 10 side to support the heating 40c, and a circle attached to the tip of the support 40b. It has an arc-shaped heating unit 40c. The main body 40a is composed of, for example, a case made of aluminum and a power supply device housed inside the case. The support portion 40b is formed of, for example, a rod shape made of aluminum, and one end thereof is fixed to the case of the main body portion 40a to become a fixed end, and the other end extends to the tank 10 side to become an extending end.

The heating portion 40c is fixed to the extending end of the support portion 40b. The heating portion 40c is formed by bending a plate-shaped member into an arc shape with a predetermined radius of curvature. The radius of curvature of the heating portion 40c is preferably the same as the radius of curvature of the fiber bundle F wound around the liner 11. The length of the arc of the heating portion 40c along the circumferential direction of the tank 10 and the width along the axis CL direction are set so as to cover the end portion E of the fiber bundle F. The heating portion 40c is installed so that, for example, the distance from the end portion E of the fiber bundle F is in the range of 5 mm to 50 mm.

On the other hand, the slide unit 50 is provided on the upper surface of the mounting table 21c and closer to the automatic shutter 26 than the tank 10. The slide unit 50 is arranged above the two rails 50a laid on the upper surface of the mounting table 21c and extending to the axis CL of the tank 10, the slider 50b movably attached to the rail 50a, and the slider 50b. It has a holder 50c for fixing and holding the main body 40a of the far-infrared heater 40.

When the fixing step S5 is performed using the fiber bundle fixing device 20 having such a structure, first, the bases 12 and 13 of the tank 10 are supported by the pair of support blocks 30b of the work transfer unit 30, respectively. The tank 10 is placed on the pallet 30a. Subsequently, the pallet 30a is carried into the work accommodating chamber R and stands still at the central position shown in FIG. 4A of the work accommodating chamber R. Next, the automatic shutter 26 is automatically opened, the slide unit 50 is operated by the operator M, and the far-infrared heater 40 moves in parallel with the axis CL direction of the tank 10. The slide unit 50 is moved by the operator M and operated so that the end portion E of the fiber bundle F wound around the liner 11 is located substantially at the center of the heating portion 40c of the far infrared heater 40.

Next, the worker M activates the power supply device of the far-infrared heater 40, and heats the terminal portion E of the fiber bundle F with the far-infrared heater 40. Here, it is preferable that the surface temperature of the far-infrared heater 40 is 250 ° C. to 350 ° C. and the heating time is 3 minutes to 4 minutes to heat the entire end portion E. By heating, the thermosetting resin at the end E of the fiber bundle F is thermosetting, and the end E is fixed to the fiber bundle F wound around the liner 11. Then, after the heating is completed, the tank 10 is carried out from the work accommodating chamber R by the pallet 30a and transported to a thermosetting furnace or a constant temperature bath in the next thermosetting step.

In the thermosetting step S6 following the fixing step S5, the thermosetting resin impregnated in the fiber bundle F wound around the liner 11 is thermosetting. Specifically, the liner 11 in which the fiber bundle F is wound around the outer circumference is placed in a thermosetting furnace or a constant temperature bath and heated at a temperature of, for example, about 85 ° C. for a predetermined time, and the epoxy resin or the like in the fiber bundle F or the like is heated. The thermosetting resin is heat-cured. As a result, the reinforcing layer 14 is formed and the tank 10 is manufactured.

In the method for manufacturing the tank 10 according to the present embodiment, at the end of winding the fiber bundle F, the end portion E of the cut fiber bundle F is attached to the fiber bundle F wound around the liner 11, and then a far-infrared heater is used. By heating with 40, the end portion E of the fiber bundle F is fixed to the fiber bundle F wound around the liner 11. Thereby, the end portion E of the fiber bundle F can be easily fixed to the outer peripheral surface of the liner 11. Moreover, the heating by the far-infrared heater 40 can be performed in a non-contact manner with the end portion E of the fiber bundle F as compared with the conventional crimp fixing with a trowel, so that the fixed fiber bundle F can be peeled off by pulling the trowel apart as in the conventional case. Can be prevented.

Further, in the sticking step of the manufacturing method of the tank 10, the roller is linearly slid in the circumferential direction of the tank 10 while pressing a constant load on the outer periphery of the tank 10 with the end portion E of the fiber bundle F cut by the roller. Therefore, it is possible to prevent the generation of voids in and around the terminal portion E.

According to the method of manufacturing the tank 10 according to the embodiment, there is also an effect that the problem in the method of manufacturing the tank by the conventional manual weaving method is solved.

As shown in FIG. 5A, in the conventional method of manufacturing a tank by a manual braiding method, the end portion of the fiber bundle F1 of the liner W1 is manually compared with the liner W1 held by the tank holding jig 60. It is configured by a method of fixing E1. The liner W1 has caps K1 and K2 at both ends in the axial direction, and has a reinforcing layer H1 formed by winding a fiber bundle F1 around an outer peripheral surface.

The tank holding jig 60 has a table 61, a holder 62 for holding the base K1, and a holder 63 for holding the base K2, and is configured to hold the liner W1 in a stationary state.

As shown in FIGS. 5 (a) to 5 (d), the fixing processing method by the manual weaving method is composed of the first step, the second step, the third step and the fourth step, and each of them is composed of the first step, the second step, the third step and the fourth step. The steps are carried out in sequence. In the first step, as shown in FIG. 5A, the four dummy threads DF1, DF2, DF3, and DF4 are spaced apart from each other in the circumferential direction of the terminal portion E1 of the fiber bundle F1 forming the reinforcing layer H1. It is manually inserted by the worker.

In the second step, as shown in FIG. 5B, the terminal portion E1 of one fiber bundle F1 is manually broken into four by an operator, and the broken fiber bundle F1 is broken into four. , Dummy threads DF1, DF2, DF3, and DF4, respectively. In the third step, one end of each of the dummy threads DF1, DF2, DF3, and DF4 through which the fiber bundle F1 is passed is pulled by the operator in the direction of the base K2 indicated by the arrow.

As a result, the fiber bundle F1 and the dummy threads DF1, DF2, DF3, and DF4 are woven into the reinforcing layer H1. In the fourth step, the braided fiber bundle F1 and the dummy threads DF1, DF2, DF3, and DF4 are manually reinforced layer H1 by an operator as shown in FIGS. 5 (c) and 5 (d). The end portion E1 is embedded in the reinforcing layer H1 so as not to protrude from the outer peripheral portion of the. With this configuration, the end portion E1 is fixed to the reinforcing layer H1.

However, the fixing treatment method by the manual weaving method requires careful work of paying attention to the adhesion of the thermosetting resin such as the epoxy resin impregnated in the fiber bundle F1 to the operator's hand. If this thermosetting resin adheres to the worker's skin, it may affect the skin, so the operator should be careful not to allow the thermosetting resin to adhere to the skin when knitting. Become. Therefore, in addition to the work of weaving the fiber bundle F1 into each reinforcing layer H1, the work of taking care to prevent the thermosetting resin from adhering to the skin is overlapped, so that there is a problem that the work man-hours increase.

According to the method for manufacturing the tank 10 according to the present embodiment, the fiber bundle F is performed by a simple operation of moving the far-infrared heater 40 by an operator, and the end portion E of the fiber bundle F is wound around the fiber bundle F in a non-contact manner. Since it can be fixed to, it is possible to obtain the effect of solving the problems of caring work and increase in work man-hours in the fixing processing method by the manual knitting method.

Further, according to the method for manufacturing the tank 10 according to the present embodiment, there is also an effect that the problem in the method for manufacturing the tank by the conventional entanglement method by needle stick is solved.

In the conventional method of manufacturing a tank by the needle stick entanglement method, the terminal portion E2 of the fiber bundle GF formed in the reinforcing layer H2 of the liner W2 set in the needle stick device 70 shown in FIG. 6A is fixed. It consists of methods. The reinforcing layer H2 of the liner W2 has a CF layer in which a fiber bundle CF made of carbon fibers is wound around the outer peripheral surface of the liner W2, and a GF layer in which a fiber bundle GF made of glass fibers is wound.

The needle sticking device 70 includes a table 71 installed on the floor K, a moving unit 72 provided on the table 71 that holds the liner W2 and moves the liner W2 in the axial direction, and a needle sticking unit 73 that sticks a needle into the reinforcing layer H2. It has a needle stick handle 74 for adjusting the needle stick depth.

The needle sticking unit 73 has a pair of squares each having 34 needles arranged in a square box, and each pair of squares is rotated, and 68 pieces are simultaneously stabbed into the GF layer of the reinforcing layer H2 to form fibers. It is configured to entangle the bundled GFs with each other. As shown in FIG. 6B, each needle has a stepped portion having a diameter (D3) of about 0.5 mm and a tip portion formed in an uneven shape in the circumferential direction. The attachment part is configured to entangle the fiber bundle GF of the GF layer.

In the fixing treatment method by the entanglement method by needle sticking, the liner W2 is first set on the moving unit 72 by the operator, and then the end portion E2 of the fiber bundle GF formed on the reinforcing layer H2 and the needle of the needle sticking unit 73. The liner W2 is moved so as to match the position of. Next, the needle piercing handle 74 is operated by an operator, and as shown in FIG. 6B, the depth to the needle tip in the GF layer is 2.1 mm ± 0 so that the needle tip does not reach the CF layer. Adjusted to a range of .2 mm.

When the tip of the needle is pierced by the end E2 of the GF layer, the pair of boxes of the needle piercing unit 73 rotate, so that the tips of a total of 68 needles rotate in the GF layer, and the fiber bundle in the GF layer. GFs get entangled with each other. When the fiber bundles GF are entangled with each other, the needle stick handle 74 is operated by an operator, and the tip of the needle is separated from the GF layer. With this configuration, the terminal portion E2 of the fiber bundle GF formed in the reinforcing layer H2 is fixed to the fiber bundle GF in the GF layer.

However, in the fixing treatment method by the entanglement method by needle sticking, the needle sticking is performed on the GF layer so as not to damage the CF layer that maintains the mechanical strength of the tank composed of the liner W2. Therefore, it is necessary to control the needle puncture depth in the GF layer with high accuracy so that the tip of the needle does not reach the CF layer. Further, since the tip of the needle is relatively thin, it has a structure in which the tip of the needle is easily bent or broken. Therefore, it is necessary to confirm that the needle tip is bent or broken. As a result, there is a problem that the work man-hours increase because it is necessary to control the dimensions with high accuracy of the needle stick depth and to confirm the shape and breakage of the needle tip.

According to the method for manufacturing the tank 10 according to the present embodiment, the fiber bundle F is carried out by a simple operation of moving the far-infrared heater 40 by an operator, and the end portion E of the fiber bundle F is wound around the fiber bundle F in a non-contact manner. Since it can be fixed to the infrared ray, it is possible to obtain the effect of solving the problem of dimensional control with high accuracy of the needlestick depth and confirmation of the shape and breakage of the needle tip in the fixing process method by the entanglement method by the needlestick.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs are designed without departing from the spirit of the present invention described in the claims. You can make changes. For example, the far-infrared heater is not limited to the above-mentioned structure, and various modifications may be applied.

10 Tank 11 Liner 12, 13 Base 14 Reinforcing layer 15 Body 16, 17 Dome 20 Fiber bundle fixing device 21 Work table 21a Back side support 21b Front side support 21c Mounting stand 22 Back side plate 23 Carry-in side plate 24 Carry-out side plate 25 Top plate 26 Automatic shutter 30 Work transfer unit 30a Pallet 30b Support block 40 Far infrared heater 40a Main body 40b Support 40c Heating part 50 Slide unit 50a Rail 50b Slider 50c Holder E End part F Fiber bundle R Work storage chamber

Claims (1)

A method for manufacturing a tank, which is a method of manufacturing a tank by winding a plurality of fiber bundles impregnated with a thermosetting resin around an outer peripheral surface of a liner having a space filled with gas.
A cutting step of cutting the fiber bundle at the end of winding the fiber bundle impregnated with the thermosetting resin, and
A sticking step of sticking the end portion of the cut fiber bundle to the fiber bundle wound around the liner, and
A fixing step of heating the pasted end portion with far infrared rays and fixing it to a fiber bundle wound around the liner.
A thermosetting step of thermosetting the thermosetting resin impregnated in the fiber bundle wound around the liner, and
A method of manufacturing a tank, which comprises.

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