JPWO2018135155A1 - Filament winding method and filament winding apparatus using the same - Google Patents

Abstract

Problem: To provide a filament winding method capable of effectively winding a fiber bundle while reducing winding time and setting time. SOLUTION: On the outer periphery of a liner W having a trunk portion 10A, dome portions 10B and 10C formed at both ends of the trunk portion 10A, and cap portions 10D and 10E provided at the tops of the dome portions 10B and 10C. A guide arrangement step of arranging a plurality of fiber bundle guides 41 and 42 for guiding the fiber bundle f on the outer circumference of the liner W on one side of the outer circumference of the liner W when the fiber bundle f is wound to form a fiber layer; A rotation step for rotating W around the axis, and a winding step for winding the fiber bundle f around the outer periphery of the liner W by reciprocating the plurality of fiber bundle guides 41 and 42 along the axial direction of the liner W. Including configuration.

Description

  TECHNICAL FIELD The present invention relates to a filament winding (hereinafter referred to as “FW”) method for forming a fiber layer on the outer periphery of a liner and an FW device for using the method, and more particularly to a fuel cell vehicle and its infrastructure. The present invention relates to a FW method for manufacturing a composite container and a pressure accumulator for a hydrogen station.

  The FW molding apparatus is configured by winding a fiber bundle (reinforcing fiber) f impregnated with resin on its outer periphery in a helical shape or a hoop shape while rotating a metal liner W supported at both ends by a shaft. A composite container or the like is formed.

FIG. 6 is a schematic configuration diagram showing a configuration of a conventional FW molding apparatus. One direction horizontal to the ground is defined as an X direction, a direction horizontal to the ground and perpendicular to the X direction is defined as a Y direction, and a direction perpendicular to the X direction and the Y direction is defined as a Z direction.
The FW molding apparatus 201 includes a table 20, a right liner drive system 30R having a shaft 31R, a left liner drive system 30L having a shaft 31L and a drive motor 32L, a fiber bundle supply system 240, and a computer. And a control device 250 (see, for example, Patent Document 1).

The metal liner W mounted on the FW molding apparatus 201 is formed, for example, in a cylindrical body portion 10A having an outer diameter d1, a dome portion 10B formed on the left side of the body portion 10A, and a right side of the body portion 10A. And a dome portion 10C. A cylindrical base 10D having an outer diameter d2 (d1> d2) is provided at the top of the dome part 10B, and a cylindrical base having an outer diameter d2 (d1> d2) at the top of the dome part 10C. Part 10E is provided.
As a result, the base portion 10D of the metal liner W is fixed to the shaft shaft 31R by, for example, a screw mechanism, and the base portion 10E of the metal liner W is fixed to the shaft shaft 31L, for example, by a screw mechanism. (X direction) is fixed so that the central axis of the metal liner W coincides.

On the other hand, the reinforcing fiber f used in the FW molding apparatus 201 is configured by including a thermosetting resin in a fiber bundle composed of a plurality of fibers. Examples of the thermosetting resin include epoxy resin, unsaturated polyester resin, polyimide, and the like, and examples of the fiber include carbon fiber, metal fiber, glass fiber, aramid fiber, or a mixed fiber thereof.
Such fibers and thermosetting resin are set in the fiber bundle supply system 240.

  The fiber bundle supply system 240 includes a bobbin group 45 for supplying fibers, a resin tank 47 for impregnating the fibers with resin, an annular head (fiber bundle guide) 41 for guiding the reinforcing fibers f, and the head 41 in the XYZ directions. A drive arm (drive mechanism) 43 that moves or reverses the direction in the X-axis direction is provided.

  The control device 250 is responsible for controlling the FW molding device 201 in accordance with a program that defines the driving status of the metal liner W and the like, the delivery status of the reinforcing fibers f from the fiber bundle supply system 240, and the like. That is, winding conditions (programs) such as the rotation speed of the drive motor 32L, the timing of rotation, the number of times the head 41 is reciprocated and transferred, the transfer distance, and the movement speed are input to the control device 250.

  In such an FW molding device 201, when a start switch or the like is operated while the metal liner W is pivotally supported, the control device 250 receives the switch operation and controls the drive motor 32L to control the metal. The liner W is rotated around the axis (rotation step). In synchronization with the rotation of the metal liner W, the control device 250 drives and controls the drive arm 43 to reciprocate and rotate the head 41 along the axial direction (X direction, −X direction) of the metal liner W. The reinforcing fiber f is sent out from the head 41 and wound around the outer periphery of the metal liner W (winding step).

  Moreover, in order to shorten winding time, the FW shaping | molding apparatus using the multi-feed yarn FW method which winds several reinforcement fiber f around the outer periphery of the metal liner W simultaneously is also disclosed (for example, refer patent document 2). . Such an FW molding apparatus includes an annular ring unit that radially includes 20 fiber bundle guides that supply reinforcing fibers f to the metal liner W.

JP 2014-136369 A JP 2011-085158 A

  However, the FW molding apparatus using the multi-feed yarn FW method has a problem in that it has a ring unit and is large in size, and it takes time to set the fiber and attach the metal liner W to the ring unit. . Further, since the reinforcing fibers f are folded in large quantities in the regions of the base portions 10D and 10E of the metal liner W, which are the folding-back positions of the reinforcing fibers f, the thickness of the fiber layer in that region is the single-feed yarn FW method. It may become larger than the wall thickness by.

  On the other hand, the FW molding apparatus 201 using the single-feed yarn FW method has a problem that the winding time is long. In particular, when a plurality of reinforcing fibers f are wound at the same time, the reinforcing fibers f may slip on the dome portions 10B and 10C of the metal liner W, and may not be wound correctly along the set track. When such a side slip of the reinforcing fiber f occurs, this portion bulges and the appearance is impaired, and the fiber direction deviates from the correct reinforcing winding line, resulting in variations in the strength of the composite container and the like. appear.

  The present inventors examined the FW method that can effectively wind the reinforcing fiber f while shortening the winding time and setting time. Therefore, it has been found that a plurality of fiber bundle guides are arranged on one side of the outer periphery of the liner. Thereby, the setting was easy and the winding was reliable, the winding time was short, and the reinforcing fiber f could be wound effectively.

That is, in the filament winding method of the present invention, a fiber bundle is wound around the outer periphery of a liner having a body part, a dome part formed at both ends of the body part, and a base part provided at the top of the dome part. A filament winding method for forming a fiber layer, wherein a plurality of fiber bundle guides for guiding the fiber bundle to the outer periphery of the liner are arranged on one side of the outer periphery of the liner, and the liner is rotated about an axis. A rotation step for rotating, and a winding step for reciprocating a plurality of fiber bundle guides along the axial direction of the liner to wind the fiber bundle around the outer periphery of the liner.
Here, “one side of the outer periphery of the liner” means that one side (within 180 °) with the plane including the central axis of the liner as a boundary surface, the workability of liner exchange and fiber exchange, Considering ease of control, it is preferably within 90 °.

  According to the filament winding method of the present invention, a fiber bundle guide only needs to be provided on one side, so that the size can be reduced and setting (device preparation) is facilitated. In addition, an increase in the thickness of the fiber layer at the turn-back position of the fiber bundle can be suppressed, and unevenness in the thickness of the fiber layer in those regions can be eliminated. As a result, while maintaining the advantage that the winding time is shorter than the single-feed yarn FW method, it is possible to ensure the same quality as the single-feed yarn FW method.

(Means and effects for solving other problems)
Further, in the filament winding method of the present invention, the fiber bundle may be wound around the outer periphery of the liner by reciprocating a plurality of fiber bundle guides adjacent to each other in the axial direction.
According to the filament winding method of the present invention, it is possible to prevent a step due to a fiber bundle or a cavity due to the step.

Further, in the filament winding method of the present invention, when the fiber bundle is wound around the outer periphery of the body portion of the liner, the fiber bundle guide behind the advancing direction with respect to the axial direction winds the fiber bundle, and then the axial direction. The fiber bundle guide at the front in the traveling direction may wind the fiber bundle around a position adjacent to the fiber bundle.
According to the filament winding method of the present invention, the fiber bundle wound first becomes a guide, and the track of the fiber bundle wound later can be made.

Further, the filament winding method of the present invention is such that when the fiber bundle is wound around the outer circumference of the dome portion of the liner, the fiber bundle wound by the fiber bundle guide on the side in the direction in which the side slip easily occurs is less likely to cause side slip. The fiber bundle guide adjacent to the fiber bundle guide may wind the fiber bundle around the position adjacent to the fiber bundle.
Here, the “trajectory that does not easily cause a skid” includes a trajectory in which a frictional force due to a friction coefficient or a tension is taken into consideration on a curved surface close to an isotension geodesic line or a shape of an isotension geodesic line.
According to the filament winding method of the present invention, the fiber bundle wound by the fiber bundle guide on the side in which the side is easily slipped is less slipped by being wound at a position where it is difficult to slip.

In the filament winding method of the present invention, the fiber bundle may be wound around the outer periphery of the liner by reciprocating a plurality of fiber bundle guides while being adjacent in the radial direction.
According to the filament winding method of the present invention, the inner fiber bundle, which has been a problem of the conventional single-feed yarn FW method, is slackened, and it is possible to suppress the tightening effect from being weakened due to the difference in tension in the fiber bundle, and the hoop. Winding and helical winding can be wound with a smaller number of reciprocations.

Further, in the filament winding method of the present invention, when moving the plurality of fiber bundle guides in the forward path and / or the return path, the plurality of fiber bundle guides are moved adjacent to each other in the axial direction, so that the outer periphery of the liner is You may make it perform combining combining winding a fiber bundle and winding the said fiber bundle on the outer periphery of the said liner by moving a some fiber bundle guide, adjoining to radial direction.
According to the filament winding method of the present invention, it is possible to cope with hoop winding and helical winding of various numbers of layers (including odd and even numbers).

  The filament winding apparatus of the present invention is a filament winding apparatus that forms a fiber layer by winding a fiber bundle around an outer periphery of a liner, and a plurality of fiber bundle guides that guide the fiber bundle on the outer periphery of the liner; A rotation mechanism that rotates the liner around its axis; and a controller that reciprocates the plurality of fiber bundle guides along the axial direction of the liner, and the plurality of fiber bundle guides are arranged on one side of the outer periphery of the liner. It is like that.

The schematic block diagram which shows the FW shaping | molding apparatus which concerns on this invention. The figure at the time of the hoop winding in 1st embodiment of this invention. The figure at the time of the helical winding in 1st embodiment of this invention. The figure at the time of hoop winding in 2nd embodiment of this invention. The figure at the time of the helical winding in 2nd embodiment of this invention. The schematic block diagram which shows the conventional FW shaping | molding apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments described below, and it goes without saying that various aspects are included without departing from the spirit of the present invention.

<First embodiment>
FIG. 1 is a schematic configuration diagram showing the configuration of the FW molding apparatus according to the first embodiment. In addition, the same code | symbol is attached | subjected about the thing similar to the FW shaping | molding apparatus 201 mentioned above.
The FW molding apparatus 1 includes a table 20 having a linear guide 21, a right liner drive system 30R having a shaft support shaft 31R, a left liner drive system 30L having a shaft support shaft 31L and a drive motor 32L, and a fiber bundle supply system 40. And a control device 50 constituted by a computer.

The right liner drive system 30R includes a shaft support block 33R and a shaft support shaft 31R. The shaft support block 33R is placed on the table 20 via the linear guide 21, and is slidable in the left-right direction (X direction, -X direction). Thereby, when the metal liner W is mounted or removed, it can be retracted to the right.
The shaft 31R is attached to the shaft block 33R and supports the metal liner W using a screw mechanism or the like at the left end.

The left liner drive system 30L includes a shaft support block 33L, a drive motor 32L, and a shaft 31L. The shaft support block 33L is placed on the table 20.
The shaft 31L is attached to the shaft block 33L, the left end is fixed to the drive motor 32L, and the metal liner W is supported at the right end using a screw mechanism or the like.

  Such a drive motor 32L is rotationally driven in response to a control signal from the control device 50. Thereby, the metal liner W pivotally supported between the pivot shaft 31R and the pivot shaft 31L rotates around the axis.

  The fiber bundle supply system 40 includes a first bobbin group 45 that supplies fibers, a second bobbin group 46 that supplies fibers, a resin tank 47 that impregnates the fibers with resin, and an annular first guide that guides the reinforcing fibers f. A head (first fiber bundle guide) 41, a first drive arm 43 that moves the first head 41 in the XYZ directions and reverses the direction in the X-axis direction, and an annular second head that guides the reinforcing fibers f (Second fiber bundle guide) 42 and a second drive arm 44 that moves the second head 42 in the XYZ directions and reverses the direction in the X-axis direction.

  And the 1st head 41 and the 2nd head 42 are arrange | positioned adjacent to an axial direction (X direction) (guide arrangement | positioning step). Thereby, the reinforcing fiber f guided by the first head 41 and the reinforcing fiber f guided by the second head 42 are wound so as to be aligned on the outer periphery of the metal liner W.

  In such a fiber bundle supply system 40, in response to the control signal of the control device 50, the first head 41 reciprocates along the axial direction (X direction, -X direction) of the metal liner W, while reinforcing fiber f To the outer periphery of the metal liner W, and the second head 42 reciprocates along the axial direction (X direction, -X direction) of the metal liner W so as to send the reinforcing fiber f to the outer periphery of the metal liner W. It has become.

  The control device 50 is responsible for controlling the FW molding device 1 in accordance with a program that defines the driving status of the metal liner W and the like, the delivery status of the reinforcing fibers f from the fiber bundle supply system 40, and the like. That is, winding conditions (programs) such as the rotation speed of the drive motor 32L, the timing of rotation, the number of times the heads 41 and 42 are reciprocated and transferred, the transfer distance, and the movement speed are input to the control device 50.

  In such an FW molding apparatus 1, when the start switch or the like is operated while the metal liner W is already pivotally supported, the control device 50 receives the switch operation and controls the drive motor 32L to control the metal. The liner W is rotated around the axis (rotation step). In synchronization with the rotation of the metal liner W, the control device 50 drives and controls the first drive arm 43 and the second drive arm 44 so that the first head 41 and the second head 42 are in the axial direction of the metal liner W. The reinforcing fiber f is sent out from the first head 41 and the second head 42 while being reciprocated along (X direction, -X direction) and wound around the outer periphery of the metal liner W (winding step).

  Here, the operation of the first head 41 and the operation of the second head 42 will be described in detail. Here, it is assumed that the reinforcing fiber f is repeated 10 times on the outer periphery of the metal liner W by alternately repeating 10 reciprocating hoop windings and 10 reciprocating helical windings.

FIG. 2A is a perspective view showing a state of the heads 41 and 42 when the reinforcing fiber f is wound in a hoop shape, and FIG. 2B is a side view when the reinforcing fiber f is wound in a hoop shape. is there. The two reinforcing fibers are wound so that the head on the rear side in the traveling direction of the winding operation slightly precedes the head on the front side in the traveling direction with respect to the axial direction of the metal liner W.
That is, first, the reinforcing fiber f is sent out from the first head 41 and wound around the first circumferential position on the outer periphery of the metal liner W (first winding step), and then the second is so followed after a little delay. The reinforcing fiber f is sent out from the head 42 and wound around the second circumferential position on the outer periphery of the metal liner W (second winding step).
The first circumferential position is defined as a position to be wound around the outer periphery of the metal liner W by hoop winding first, and is inclined at a predetermined angle α with respect to the axial direction. The (n + 1) th circumferential position is also inclined at a predetermined angle α with respect to the axial direction, and is adjacent to a predetermined interval Δx on the axial direction (X direction) side of the metal liner W from the nth circumferential position. ing.
The predetermined spacing Δx is preferably in contact with the reinforcing fiber f, but is not necessarily in contact strictly, and the reinforcing effect of the reinforcing fiber f wound first and the reinforcing fiber f wound later is the same as that of the metal liner W. From the point given to the part, as long as it is within the lateral width of the reinforcing fiber f, the interval may be spaced.

Then, the second winding step is executed after the first winding step while moving the first head 41 and the second head 42 along the axial direction (X direction) of the metal liner W.
Thereby, the reinforcement fiber f wound first becomes a guide, and the track of the reinforcement fiber f wound later can be made.

Thereafter, at a position where the direction in which the first head 41 and the second head 42 are reciprocated is switched, the reinforcing fiber f is sent out from the first head 41 to the (n−1) circumferential position on the outer periphery of the metal liner W. Simultaneously with the winding, the reinforcing fiber f is sent out from the second head 42 and wound around the nth circumferential position on the outer periphery of the metal liner W.
Furthermore, when the moving direction of the head is reversed, the head on the rear side in the moving direction of the winding operation is switched from the first head 41 to the second head 42, and the head on the front side in the moving direction is changed from the second head 42 to the first head. Switch to 41. Then, the reinforcing fiber f is sent out from the second head 42 and wound around the n-th circumferential position of the outer periphery of the metal liner W, and at the same time, the reinforcing fiber f is sent out from the first head 41 and n-1) Wind around the circumferential position.

Thereafter, the first head 41 and the second head 42 are moved along the axial direction (−X direction) of the metal liner W, and the second head 42 is followed slightly after the second winding step. The first winding step by the first head 41 is executed.
As described above, when the first head 41 and the second head 42 are moved in the X direction (outward path), the second winding step is executed after the first winding step, and when the traveling direction is switched, When the second winding step is executed simultaneously with the one winding step and moved in the −X direction (return path), the first winding step is executed after the second winding step.

And when the hoop winding which makes the reinforcement fiber f 10 reciprocations on the outer periphery of the metal liner W finishes, 10 reciprocal helical windings are performed. FIG. 3 is a diagram illustrating a state of the heads 41 and 42 when the reinforcing fiber f is wound in a helical shape. After the reinforcing fiber f is fed out from the first head 41 and wound around the first heel position on the outer periphery of the dome portion 10C of the metal liner W (first winding step), the second head is followed so as to follow this with a slight delay. The reinforcing fiber f is sent out from 42 and wound around the second heel position on the outer periphery of the dome portion 10C of the metal liner W (second winding step).
In the present embodiment, the first collar position on the outer periphery of the dome portion 10C is an orbit (isotonic geodesic line) in a region where no side slip occurs on the outside (the direction of the large diameter side in the dome portion 10C). It is defined as a position to be wound helically around the outer periphery of the dome portion 10C of the metal liner W (other examples of the first rod position will be described later as “other embodiments”). The (n + 1) eyelid position on the outer periphery of the dome portion 10C is next to a predetermined interval Δx on the inner side (smaller diameter side in the dome portion 10C) than the nth eyelid position.
As a result, the reinforcing fiber f wound by the first head 41 on the side in the direction in which it easily slides to the outside cannot be prevented from skidding by the reinforcing fiber f because the reinforcing fiber f is not wound next to the reinforcing fiber f. It is hard to slip by winding around (isotonic geodesic line). In addition, the reinforcing fiber f of the first head 41 wound first becomes a guide for the reinforcing fiber f wound by the second head 42.

Thereafter, the first head 41 and the second head 42 move toward the dome portion 10B of the metal liner W, but the first head 41 and the second head 42 are in the center of the body portion 10A of the metal liner W. At the time of moving the part, the reinforcing fiber f is sent out from the first head 41 and wound around the first flange position on the outer periphery of the body part 10A of the metal liner W (first winding step) and simultaneously with the second head The reinforcing fiber f is sent out from 42 and wound around the second flange position on the outer periphery of the body portion 10A of the metal liner W (second winding step).
And when the 1st head 41 and the 2nd head 42 move to the dome part 10B of the metal liner W, the reinforcement fiber f is sent out from the 2nd head 42, and the 2nd collar of the outer periphery of the dome part 10B of the metal liner W is sent out. After winding around the position (isotension geodesic line) (second winding step), the reinforcing fiber f is sent out from the first head 41 so as to follow this with a slight delay, and the outer circumference of the dome portion 10B of the metal liner W is Winding to the first heel position (step with first winding).

Note that the second heel position on the outer periphery of the dome portion 10B is a dome of the metal liner W so that it is a trajectory (isotension geodesic line) in a region where no side slip occurs on the outer side (the direction of the larger diameter side in the dome portion 10B). It is defined as a position to be wound around the outer periphery of the portion 10B by helical winding. The (n-1) collar position on the outer periphery of the dome portion 10B is next to a predetermined interval Δx on the inner side of the metal liner W (smaller diameter side in the dome section 10B) than the n-th collar position.
As a result, the reinforcing fiber f wound by the second head 42 on the side in the direction in which it easily slides to the outside cannot be prevented from skidding by the reinforcing fiber f because the reinforcing fiber f is not wound next to it. It is hard to slip by being wound around (isotension geodesic line). Further, the reinforcing fiber f of the second head 42 wound first becomes a guide for the reinforcing fiber f wound by the first head 41.
As described above, the first head 41 and the second head 42 are moved along the axial direction (X direction, −X direction) of the metal liner W, and on the outer periphery of the dome portion 10C, the first winding step is performed after the first winding step. A two-winding step is executed, and on the outer periphery of the body portion 10A, a second winding step is executed simultaneously with the first winding step. On the outer periphery of the dome portion 10B, a first winding step is performed after the second winding step. Execute.

  As described above, according to the FW molding apparatus 1 according to the first embodiment, since the first head 41 and the second head 42 may be provided, the size can be reduced, and setting (apparatus preparation) is easy. Moreover, an increase in the thickness of the fiber layer at the turn-back position of the reinforcing fiber f can be suppressed, and unevenness in the thickness of the fiber layer in those regions can be eliminated. As a result, while maintaining the advantage that the winding time is shorter than the single-feed yarn FW method, it is possible to ensure the same quality as the single-feed yarn FW method.

<Second embodiment>
4 and 5 are diagrams when the reinforcing fiber f is wound in the second embodiment. In addition, about the thing similar to the FW shaping | molding apparatus 1 mentioned above, the same code | symbol is attached | subjected.
The FW molding apparatus includes a table 20 having a linear guide 21, a right liner drive system 30R having a shaft support shaft 31R, a left liner drive system 30L having a shaft support shaft 31L and a drive motor 32L, and a fiber bundle supply system 140. And a control device constituted by a computer.

  The fiber bundle supply system 140 includes a first bobbin group 45 for supplying fibers, a second bobbin group 46 for supplying fibers, a resin tank 47 for impregnating the fibers with resin, and an annular first guide for guiding the reinforcing fibers f. A head (first fiber bundle guide) 141, a first drive arm (not shown) that moves the first head 141 in the XYZ directions and reverses the direction in the X-axis direction, and an annular shape that guides the reinforcing fibers f The second head (second fiber bundle guide) 142 and a second drive arm (not shown) that moves the second head 142 in the XYZ directions and reverses the direction in the X-axis direction.

  And the 1st head 141 and the 2nd head 142 are arrange | positioned adjacent to a radial direction (guide arrangement | positioning step). Thereby, the reinforcing fiber f guided by the first head 141 and the reinforcing fiber f guided by the second head 142 are wound so as to overlap each other on the outer periphery of the metal liner W.

  In such a fiber bundle supply system 140, the first head 141 reciprocates along the axial direction (X direction, -X direction) of the metal liner W in response to a control signal from the control device, and the reinforcing fiber f is supplied. While feeding to the outer periphery of the metal liner W, the second head 142 reciprocates along the axial direction (X direction, -X direction) of the metal liner W, and sends the reinforcing fiber f to the outer periphery of the metal liner W. ing.

  Here, the operation of the first head 141 and the operation of the second head 142 will be described in detail. FIG. 4A is a perspective view showing the state of the heads 141 and 142 when the reinforcing fiber f is wound in a hoop shape, and FIG. 4B is a side view when the reinforcing fiber f is wound in a hoop shape. is there. Immediately after the reinforcing fiber f is sent out from the first head 141 and wound around the m-th circumferential position of the outer periphery of the metal liner W (first winding step), the second head 142 follows the second head 142 so as to follow this slightly later. The reinforcing fiber f is sent out and wound around the m-th circumferential position on the outer periphery of the metal liner W (second winding step).

Then, the first winding step and the second winding step are executed while moving the first head 141 and the second head 142 along the axial direction (X direction, -X direction) of the metal liner W.
As a result, the inner reinforcing fiber f, which has been a problem of the conventional single-feed yarn FW method, can be prevented from loosening, and the tightening effect due to the tension difference occurring in the reinforcing fiber f can be suppressed (uniform tension). Can be stretched). Furthermore, the hoop winding can be wound with a smaller number of reciprocations.
The mth circumferential position is inclined at a predetermined angle β with respect to the axial direction. At this time, when the reinforcing fiber f is wound in a hoop shape, the reinforcing fiber f is wound so as to be in contact therewith, so that the first head 41 and the second head 42 are arranged in the axial direction in the radial direction (first embodiment). Arrangement can reduce the pitch (increase the predetermined angle β) and increase the reinforcement efficiency in the circumferential direction. Therefore, when the diameter d1 of the body portion 10A of the metal liner W is large, the first head 41 and the second head 42 are aligned in the axial direction, and when the diameter d1 of the body portion 10A of the metal liner W is small, The first head 141 and the second head 142 may be properly used depending on the diameter d1 of the body portion 10A of the metal liner W so that the first head 141 and the second head 142 are arranged in the radial direction.
FIG. 5 is a perspective view showing a state of the heads 141 and 142 when the reinforcing fiber f is wound helically. As in the case of winding in a hoop shape, the reinforcing fiber f is sent out from the first head 141 and wound around the m-th heel position on the outer periphery of the metal liner W (first winding step) so as to follow it. The reinforcing fiber f is sent out from the second head 142 and wound around the m-th heel position on the outer periphery of the metal liner W (second winding step).
Thereby, helical winding can be wound by fewer reciprocations.

  As described above, according to the FW molding apparatus according to the second embodiment, since the first head 141 and the second head 142 only need to be provided, the size can be reduced, and setting (apparatus preparation) is easy. Moreover, an increase in the thickness of the fiber layer at the turn-back position of the reinforcing fiber f can be suppressed, and unevenness in the thickness of the fiber layer in those regions can be eliminated. As a result, while maintaining the advantage that the winding time is shorter than the single-feed yarn FW method, it is possible to ensure the same quality as the single-feed yarn FW method.

<Other embodiments>
(1) In the FW molding apparatus 1 described above, the number of heads is two, that is, the first head 41 and the second head 42. However, the number of heads (fiber bundle guides) is increased within a range that can be arranged on one side of the outer periphery of the liner. May be.
(2) In the above-described embodiment, the first heel position on the outer periphery of the dome portion 10C is a region where no side slip occurs on the outer side (the direction of the large diameter side in the dome portion 10C), and the outermost track (isotonic geodetic measurement). However, the first saddle position may be defined as the innermost track (isotension geodesic line) in the region where no side slip occurs on the inner side (the direction of the small diameter side in the dome portion 10C).
According to such a configuration, the reinforcing fiber f wound by the first head 41 on the side in the direction in which it is easy to skid inward cannot be prevented by the reinforcing fiber f because the reinforcing fiber f is not wound next to the reinforcing fiber f. However, it is hard to slip by winding it in a position that is hard to slip inside. Further, the reinforcing fiber f of the second head 42 wound first becomes a guide for the reinforcing fiber f wound by the first head 41.
(3) In the FW molding apparatus 1 described above, the first head 41 and the second head 42 are arranged adjacent to each other in the axial direction (X direction) or the radial direction. Winding the reinforcing fiber f around the outer circumference of the metal liner W by moving the first head 41 and the second head 42 adjacent to each other in the axial direction when moving the two heads 42 in the forward path and the return path; A configuration in which the first head 41 and the second head 42 are moved while being adjacent to each other in the radial direction may be combined with the winding of the reinforcing fiber f around the outer periphery of the metal liner W.
According to such a configuration, it is possible to deal with hoop winding and helical winding with various numbers of layers (including odd and even numbers).
(4) In the FW molding apparatus 1 described above, the reinforcing fiber f is applied to the outer circumference of the metal liner W 10 times by alternately repeating 10 reciprocating hoop windings and 10 reciprocating helical windings. The ratio of hoop winding and helical winding may be changed depending on the specification. In addition, the order of executing the hoop winding and the helical winding may be any first.

  The present invention can be suitably used for an FW molding apparatus or the like that forms a fiber layer on the outer periphery of a liner.

1 FW molding equipment (filament winding equipment)
41 First fiber bundle guide 42 Second fiber bundle guide f Reinforcing fiber (fiber bundle)
W liner 10A body part 10B, 10C dome part 10D, 10E base part

Claims (7)

This is a filament winding method in which a fiber layer is formed by winding a fiber bundle around the outer periphery of a liner having a body part, a dome part formed at both ends of the body part, and a base part provided at the top of the dome part. And
A guide arrangement step of arranging a plurality of fiber bundle guides for guiding the fiber bundle on the outer circumference of the liner, on one side of the outer circumference of the liner;
A rotating step of rotating the liner about an axis;
A filament winding method comprising: a winding step of reciprocating a plurality of fiber bundle guides along an axial direction of the liner and winding the fiber bundle around an outer periphery of the liner.   The filament winding method according to claim 1, wherein the fiber bundle is wound around the outer periphery of the liner by reciprocating a plurality of fiber bundle guides adjacent to each other in the axial direction. When winding the fiber bundle around the outer periphery of the trunk of the liner,
The fiber bundle guide at the front in the traveling direction with respect to the axial direction winds the fiber bundle at a position adjacent to the fiber bundle after the fiber bundle guide at the rear in the traveling direction with respect to the axial direction winds the fiber bundle. Item 3. The filament winding method according to Item 2. When winding the fiber bundle around the outer circumference of the dome portion of the liner,
The fiber bundle wound by the fiber bundle guide on the side in the direction in which skidding tends to occur is made to be a track in which skidding is unlikely to occur, and the fiber bundle guide adjacent to the fiber bundle guide is positioned at a position adjacent to the fiber bundle. The filament winding method according to claim 2, wherein the filament winding method is wound.   The filament winding method according to claim 1, wherein the fiber bundle is wound around the outer periphery of the liner by reciprocating a plurality of fiber bundle guides adjacent to each other in the radial direction. When moving a plurality of fiber bundle guides to the forward path and / or the backward path,
Wrapping the fiber bundle around the outer periphery of the liner by moving a plurality of fiber bundle guides adjacent to each other in the axial direction;
2. The filament winding method according to claim 1, wherein a plurality of fiber bundle guides are moved while being adjacent to each other in the radial direction in combination with winding the fiber bundle around the outer periphery of the liner. A filament winding apparatus for forming a fiber layer by winding a fiber bundle around the outer periphery of a liner,
A plurality of fiber bundle guides for guiding the fiber bundle to the outer periphery of the liner;
A rotation mechanism for rotating the liner about an axis;
A controller that reciprocates a plurality of fiber bundle guides along the axial direction of the liner,
The filament winding apparatus, wherein the plurality of fiber bundle guides are arranged on one side of the outer periphery of the liner.

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