JP2013078959A - Filament winding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable increase of production efficiency and cost reduction.SOLUTION: A filament winding apparatus includes: a support board 2 that supports a mandrel M, can reciprocate in the axial direction of the mandrel M and rotates the mandrel M; a hoop winding apparatus 3 that supports bobbins 17 that supply fiber bundles R to the mandrel M, can reciprocate in the axial direction, and rotates surroundings of the mandrel M; and a helical winding apparatus 4 that is fixedly set up, and supplies the plurality of fiber bundles R to the mandrel M. When performing the hoop winding, the support board 2 remains still in the axial direction and the rotating direction, and the hoop winding apparatus 3 rotates while moving in the axial direction, and wraps the fiber bundle R to the peripheral surface of the mandrel M by the hoop winding, and when performing the helical winding, the support board 2 rotates the mandrel M, while moving in the axial direction, and wraps the fiber bundle R to the peripheral surface of the mandrel M by the helical winding.

Description

  The present invention relates to a filament winding apparatus including a hoop winding apparatus and a helical winding apparatus.

  When producing a hollow container such as a pressure tank or a pipe by the filament winding (hereinafter referred to as FW) method, for example, a fiber bundle impregnated with a resin is hoop-wrapped around a mandrel (also referred to as a liner), Or the FW apparatus as described in patent document 1 which forms a reinforcement layer by helically winding is known.

JP-A-10-119138 (paragraph number 0002, FIG. 3)

  When a group of fiber bundles are helically wound around a mandrel at the same time, the winding process can be performed in a shorter time, and a pressure vessel or the like can be efficiently manufactured accordingly. As long as the number of fiber bundles wound around the mandrel by helical winding increases, the time required for the winding process can be shortened.

  In the above-described FW device, for example, when a fiber bundle is helically wound around a mandrel by a helical winding device, the fiber is placed in a yarn path guide cylinder attached to the helical winding ring constituting the helical winding head at equal angular intervals. It is guided to the winding position on the mandrel through the bundle.

  Conventionally, the above-described yarn path guide tube has been a cylindrical pipe shape. On the other hand, the guided fiber bundle R may be constituted by a flat fiber bundle having flatness, and the flat fiber bundle is converted into a conventional cylindrical thread guide tube. 8B1 and FIG. 8B2, in the process of passing through the yarn guide tube, the fiber bundle R is deformed into a circular shape in cross section, and a fiber bundle in a form suitable for helical winding is obtained. It was impossible to guide the supply onto the mandrel, which hindered stabilization of the product by helical winding.

  Therefore, the present invention guides the mandrel through the cylindrical hole in the yarn path guide cylinder by changing the shape of the cylindrical hole of the thread path guide cylinder incorporated in the helical winding head in the helical winding device. An object of the present invention is to provide a filament winding apparatus that can stabilize the state of the fiber bundles that are formed, and as a result, can form a helical layer appropriately and efficiently.

Specifically, in order to solve the above-described problems, the present invention is a filament winding apparatus including a helical winding device that winds a fiber bundle around a mandrel around a helical winding,
The helical winding device includes a fixed frame erected on a base, and a helical winding head supported by the fixed frame,
The helical winding heads are arranged adjacent to each other along the axis of the mandrel, and are arranged at equal intervals along the circumferential direction of each guide ring, and a plurality of guide rings connected in a circumferentially rotatable manner. Comprising a group of thread guides that are
The yarn path guide tube comprises a flat state maintaining means for maintaining a flat state of a flat fiber bundle passing through the yarn path guide tube, and constitutes a filament winding apparatus. is there.

  Furthermore, in this invention, the invention according to claim 2 is the filament winding apparatus according to claim 1, wherein the flat state maintaining means is constituted by a cylindrical hole of a yarn path guide cylinder, and the yarn path The cylindrical hole of the guide cylinder is a flat rectangular hole having a flat rectangular cross section.

  Furthermore, in this invention, the invention according to claim 3 is the filament winding apparatus according to claim 1 or 2, wherein the tube hole of the yarn guide tube is a flat rectangular hole, and the fiber In accordance with the winding angle of the bundle, there is provided an orientation control means for controlling the orientation of the flat rectangular hole of the yarn guide tube.

  According to the present invention, in a filament winding apparatus provided with a helical winding device for helically winding a fiber bundle around a mandrel, a flat fiber bundle is flattened against a yarn path guide tube attached to a helical winding head. By providing a flat state maintaining means for guiding the mandrel while maintaining the shape, the state of the fiber bundle guided on the mandrel through the yarn guide tube is stabilized in the winding position. As a result, it can be said that it works extremely effectively in that the helically wound layer can be formed appropriately and efficiently.

  Further, in the present invention, the flat state maintaining means is configured by a cylindrical hole of the yarn path guide cylinder, the cylindrical hole of the yarn path guide cylinder is configured by a flat rectangular hole, and the structure is simple. It can be said that it works extremely effectively in that it is easy to manufacture.

  By providing an orientation control means for controlling the orientation of the flat rectangular hole of the yarn guide tube according to the winding angle of the fiber bundle, the fiber bundle maintained in a flat shape can be placed on the mandrel regardless of the winding angle. It can also be said that it works extremely effectively in that it can be supplied to the winding position.

FIG. 1 is a schematic perspective view showing the entire configuration of a filament winding apparatus to which the present invention is applied. FIG. 2A is a schematic front view of the filament winding apparatus, and FIG. 2B is a schematic plan view showing a situation during helical winding. FIG. 3A is a schematic side view for explaining the configuration of the hoop winding, and FIGS. 3B and 3C are schematic side views for explaining the configuration of the helical winding. 4 is a cross-sectional view taken along line AA in FIG. 2B. 5 is a cross-sectional view taken along line BB in FIG. 6A is a cross-sectional view taken along line CC in FIG. 7, and FIG. 6B is a cross-sectional view taken along line DD in FIG. 6A. FIG. 7 is a side view showing a state in which the position of the guide ring is shifted. FIG. 8A1 is a schematic perspective view showing a state in which the fiber bundle passes through the yarn path guide according to the present invention, FIG. 8A2 is a cross-sectional view of the fiber bundle, and FIG. FIG. 8B2 is a cross-sectional view thereof, FIG. 8C is a side view of the outlet end side showing an effective situation in which the fiber bundle is extracted from the yarn path guide according to the present invention, and FIG. FIG. 8D2 is a side view on the outlet end side showing a state in which the direction of the flat rectangular hole of the yarn guide tube is rotationally controlled by the direction control means. . FIG. 9A shows a first embodiment of the direction control means, and is configured to individually control the direction of each yarn path guide tube, and FIG. A second embodiment of the direction control means is shown, and it is configured such that the direction of each yarn path guide tube can be collectively controlled.

  Hereinafter, the FW device according to the present invention will be described in detail based on the specific embodiments shown in FIGS.

〔overall structure〕
FIG. 1 is a schematic perspective view showing the FW device with a part of the entire configuration omitted. The FW device includes a winding device W and a yarn supply device S.

  The winding device W is a device for winding the fiber bundle R around the mandrel M, and the yarn supply device S includes a plurality of yarn supply packages 50 on the creel 51. The plurality of yarn supply packages 50 wind up and store the fiber bundle R.

  As said fiber bundle R, it consists of fiber materials using fiber materials, such as glass fiber, and a synthetic resin, for example. The fiber bundle supply device S supplies the fiber bundle R drawn from each yarn supply package 50 to the winding device W.

  The fiber bundle R is impregnated with a thermosetting synthetic resin material in advance. The fiber bundle R may not be impregnated with resin. In that case, a resin impregnation device (not shown) is provided between the winding device W and the fiber bundle supply device S, and the resin impregnation device applies resin to the fiber bundle R drawn from the creel 50. It is applied and supplied to the winding device W.

  A plurality of mandrels M (the mandrel before winding is M1 and the mandrel after winding is M2) are arranged on both sides of the winding device W (front and back in FIG. 1). The mandrel M1 before winding is wound on the front side (front side in FIG. 1) of the winding device W, and the fiber bundle R is wound on the rear side (back side in FIG. 1) of the winding device W by the winding device W. Mandrels M2 are arranged. And the mandrels M1 and M2 are arranged on one end side (left side in FIG. 1) of the winding device W.

  2A and 2B, the winding device W in the FW device includes a base 1 that is long to the left and right, a support base 2 that is disposed on the base 1 and supports the mandrel M, a hoop winding device 3, It comprises a helical winding device 4 and a mandrel exchange device 5. The support base 2 and the hoop winding device 3 can be driven to reciprocate along the longitudinal direction of the base 1 by drive mechanisms (not shown). The helical winding device 4 is fixed at the center position of the base 1 and feeds and guides the fiber bundle R fed from the group of yarn feeding packages 50 supported by the fiber bundle feeding device S to the mandrel M. .

  When the final product is a pressure vessel, the mandrel M is made of a metal vessel such as a high-strength aluminum material or a stainless material. If necessary, the mandrel M may be made of a plastic container. In this embodiment, as shown in FIG. 3, the mandrel M includes a central cylindrical portion Ma, a dome portion Mb continuous to the left and right ends of the cylindrical portion Ma, and a mouth portion Md protruding from the top of the dome portion Mb. The case where it is provided integrally will be described. The fiber bundle R is made of, for example, a bundle of glass fibers or carbon fibers, and the fiber bundle R in a state of being wound in the previous yarn supply package 50 is impregnated with a thermosetting resin in advance. In addition, after impregnating resin to the fiber bundle R drawn | fed out from the yarn supply package, you may send to the helical winding apparatus 4. FIG.

  The support base 2 includes a base 8 that is transferred and guided by a pair of front and rear rails 7 on the base 1, support arms 9 and 9 that are erected on both side ends of the base 8, and upper ends of both support arms 9 and 9. The chuck 10 is provided on the opposite surface. A pair of mounting jigs 11 are fixed on both the left and right sides of the mandrel M, and the mandrel M is fixed between the left and right support arms 9 and 9 by holding and fixing these mounting jigs 11 with the previous chuck 10. Supported. One chuck 10 is rotationally driven by a drive structure (not shown) to rotate the mandrel M along with it. In order to facilitate the exchange of the mandrel M, the two support arms 9 and 9 are assembled so that they can fall from the standing posture to the lying posture with respect to the base 8.

  The hoop winding device 3 includes a frame 15 that is guided by a rail 14 on a base 1, a disk-shaped winding table 16 that is rotatably supported by the frame 15, and a drive mechanism that rotationally drives the winding table 16. (Not shown). On one side of the winding table 16, a plurality of bobbins 17 for supplying fiber bundles at the time of hoop winding are arranged at equal intervals along the table periphery. In the center of the plate surface of the winding table 16, a circular opening that allows the mandrel M to reciprocate is formed. The hoop winding layer is formed on the peripheral surface of the mandrel M by reciprocating the entire hoop winding device 3 while rotationally driving the winding table 16 in a state where the opening surface of the opening and the mandrel M are orthogonal to each other. Can do.

  2A to 4, the helical winding device 4 includes a fixed frame 20 erected on the base 1, a helical winding head 21 supported by the fixed frame 20, and a group of fiber bundles toward the helical winding head 21. It comprises a guide roller (guide structure) 22 that guides the direction of change. In the center of the plate surface of the fixed frame 20, a circular opening 20a that allows the mandrel M to reciprocate is formed (see FIG. 5), and the previous guide roller 22 is disposed on the plate surface around the opening 20a. The fiber bundle R supplied from the fiber bundle supply structure is guided by turning rollers 23 arranged on both the front and rear sides of the fixed frame 20, and then passed through the tension adjustment structure 24 and fed to the helical winding head 21. . A pair of tension adjusting structures 24 are arranged on both the front and rear sides of the fixed frame 20 corresponding to the left and right guide rings 27 and 28 (see FIG. 2B).

  The helical winding head 21 includes two guide rings 27, 28 arranged adjacent to each other, a group of yarn path guide cylinders 31 arranged at equal intervals along the circumferential direction of each guide ring 27, 28, and a movable side The guide ring 28 is composed of a phase switching structure 32 for rotating the guide ring 28 and the like. In this embodiment, in order to simplify the drawing, the number of yarn path guide cylinders 31 mounted on the guide rings 27 and 28 is limited to twelve, but in practice, several tens to hundreds tens. A group of yarn path guide cylinders 31 are attached to the guide rings 27 and 28. Note that the appropriate number of fiber bundles R when performing helical winding is calculated using the diameter dimension of the mandrel M, the winding width and the winding angle of the fiber bundle R (an angle indicated by θ in FIG. 3) as variables. be able to.

[Hoop winding / helical winding]
FIG. 3 is a side view showing hoop winding and helical winding. As shown in FIG. 3A, the hoop winding winds the fiber bundle R substantially perpendicular to the mandrel axial direction Mc. As shown in FIGS. 3B and 3C, the helical winding winds the fiber bundle R at a predetermined angle θ (θ1, θ2) with respect to the mandrel axial direction Mc. As described above, hoop winding is performed by the hoop winding head 3, and helical winding is performed by the helical winding head 4.

  Of the guide rings 27, 28, one guide ring 27 is fixed to the peripheral wall of the opening 20 a provided in the fixed frame 20, and the other guide ring 28 is rotatable with respect to the fixed guide ring 27. Link. An auxiliary frame 30 is fixed to the side end of the movable guide ring 28. A circular opening 30a that allows the mandrel M to reciprocate is formed at the center of the plate surface of the auxiliary frame 30, and a guide roller 22 is disposed on the plate surface around the opening 30a (see FIG. 5).

  The yarn path guide tube 31 is attached to the guide rings 27 and 28. Specifically, in the guide ring 27 on the fixed side, the yarn path guide cylinder 31 is inclined so that the cylinder outlet 31a faces the inner side of the inner surface of the guide ring 28 on the movable side. Moreover, in the guide ring 28 on the movable side, the yarn path guide cylinder 31 is inclined so that the cylinder outlet 31a is directed toward the inner surface of the guide ring 27 on the fixed side. In this way, by making the inclination angles of the yarn path guide cylinders 31 in the guide rings 27 and 28 the same and making the inclination directions reverse, the cylinder outlets 31a of the yarn path guide cylinders 31 are as close as possible. Can be placed in a state. Thereby, both the cylinder exits 31a and 31a adjoin in the center part of the adjacent direction of each guide ring 27 and 28 in the 1st state mentioned later.

  In the present invention, the yarn path guide tube 31 includes a flat state maintaining means Cm for maintaining a flat state of the flat fiber bundle R passing through the yarn path guide tube 31. In the present invention, the flat state maintaining means Cm is constituted by a cylindrical hole of the yarn path guide cylinder 31, and the cylindrical hole of the yarn path guide cylinder 31 is a flat rectangular hole 31c having a flat rectangular shape when viewed in cross section. It is comprised by.

  Further, details of the yarn path guide tube 31 will be described with reference to FIG. As shown in FIGS. 8B1 and 8B2, the conventional yarn path guide cylinder 31 is formed of a linear cylinder having a circular hole 31d. In this conventional yarn path guide cylinder 31, when the flat fiber bundle R passes from the inlet side 31b to the outlet side 31a of the yarn path guide cylinder 31, in the process of passing, as shown in FIG. The flat state changed to a round state, and proper helical winding was not possible.

  In the present invention, in order to solve the conventional problems described above, as shown in FIGS. 8A1 and 8A2, the thread hole guide tube 31 is formed by a flat rectangular hole 31c. In this way, when the cylindrical hole of the yarn path guide cylinder 31 is formed by the flat rectangular hole 31c, the flat fiber bundle R passes from the inlet side 31b of the yarn path guide cylinder 31 toward the outlet side 31a. In the process of passing, as shown in FIG. 8A1 and FIG. 8A2, guidance can be performed while maintaining the flat state, and appropriate helical winding can be performed.

  Note that, in the yarn path guide tube 31 having the flat rectangular hole 31c according to the present invention, from the outlet end 31a side of the yarn path guide tube 31 according to the winding angle θ of the fiber bundle R (see FIGS. 2 and 3). The relationship between the direction X1 in which the fiber bundle R is drawn and the long side axis Ax2 of the flat rectangular hole 31c of the yarn path guide tube 31 is substantially orthogonal, that is, the direction X1 in which the fiber bundle R is pulled out, and the yarn path guide tube 31. The flat fiber bundle R can be supplied to the winding portion of the mandrel M in the flat state as it is, when the short side axis Ax1 of the flat rectangular hole 31c is substantially coincident (see FIG. 8C). Helical winding can be performed.

  On the other hand, when helical winding is performed by changing the winding angle θ, the direction X1 in which the fiber bundle R is drawn from the exit end 31a side of the yarn path guide tube 31 is a flat angle in the yarn path guide tube 31. When the angle α is inclined with respect to the short-side axis Ax1 of the hole 31c, even if it is formed by the cylindrical hole of the yarn guide tube 31 and the flat rectangular hole 31c, as shown in FIG. The fiber bundle R will be out of shape.

  Therefore, in the present invention, in order to prevent the deformation of the flat fiber bundle R as shown in FIG. 8D1, the fiber bundle R that is displaced in accordance with the winding angle θ of the fiber bundle R is drawn with respect to the drawing direction X1. Thus, the direction of the flat rectangular hole 31c in the yarn path guide tube 31, that is, the relation in which the pulling direction X1 is substantially orthogonal to the long-side axis Ax2 of the flat rectangular hole 31c in the yarn path guide tube 31 with respect to the pulling direction X1. An orientation control means 60 for controlling the orientation is provided (a relationship in which the drawing direction X1 and the short-side axis Ax1 of the flat rectangular hole 31c in the yarn guide tube 31 substantially coincide).

  The orientation control means 60 will be described based on a specific embodiment shown in FIG. FIG. 9A shows a first embodiment of the direction control means 60, and is configured so that the direction of each yarn path guide tube 31 can be individually controlled individually. . In this embodiment, the direction control means 60 is configured by meshing a flat gear 61 provided on the inlet end 31 b side of each yarn path guide tube 31 and a flat gear 62 that is rotationally driven by a motor 63. . In this case, each motor 63 is composed of, for example, a pulse motor, and can be configured to be driven synchronously by a motor drive control means (not shown).

  FIG. 9B shows a second embodiment of the direction control means 60, which is configured to be able to collectively control the direction of each yarn path guide tube 31. FIG. In this embodiment, the direction control means 60 includes a bevel gear 64 provided on the inlet end 31b side of each yarn path guide tube 31, a bevel gear 65 at one end of a shaft 66, and a flat gear 67 at the other end. The bevel gear 65 is engaged with the bevel gear 64, the flat gear 67 is engaged with the large diameter flat gear 68, and the large diameter flat gear 68 is rotated through the flat gear 67, the shaft 66, the bevel gear 65, and the bevel gear 64. The yarn guide tube 31 is rotated all at once.

  Both guide rings 27 and 28 arranged adjacent to each other along the axis of the mandrel M are connected as shown in FIG. 6A. A connecting shaft 34 having a diameter smaller than that of the ring peripheral surface is formed at the joint portion of the fixed ring 27, and a connecting hole 35 is formed on the inner surface of the joint portion of the movable ring 28 so as to fit around the connecting shaft 34. Furthermore, positioning grooves 36 that are opened by connecting holes 35 are formed at four locations around the joint portion of the movable ring 28 (see FIG. 6B). The rings 27 and 28 are joined together, the connecting hole 35 and the connecting shaft 34 are fitted, and a hexagon socket head bolt 37 inserted into the positioning groove 36 is screwed into the connecting shaft 34, whereby the rings 27 and 28 are relatively rotated. Connected as possible. As a result, the movable guide ring 28 is connected to the fixed guide ring 27 so as not to be separable and to be reciprocally rotatable within a range defined by the positioning groove 36 and the hexagon socket head bolt 37.

  As shown in FIG. 7, the phase switching structure 32 includes an air cylinder (operator) 40 for switching the movable guide ring 28 and a positioning structure provided between the adjacent guide rings 27 and 28. To do. The end of the piston rod of the air cylinder 40 is connected to a bracket 42 provided at the lower portion of the auxiliary frame 30 with a pin 43, and the end of the air cylinder 40 on the cylinder side is connected to a bracket 44 with a pin 45. The latter bracket 44 is fixed to the fixed frame 20 or the base 1. Accordingly, when the piston rod is extended and displaced from the state indicated by the solid line in FIG. 7 as indicated by the phantom line, the auxiliary frame 30 and the movable guide ring 28 can be rotated counterclockwise. When the piston rod is moved back and forth into the cylinder, the auxiliary frame 30 and the movable guide ring 28 can be rotated in the clockwise direction. In the positioning structure, the positioning groove 36 and the hexagon socket head bolt 37 described above also serve as the positioning structure.

  As described above, both guide rings 27 and 28 are connected so as to be relatively rotatable, and the guide ring 28 on the movable side is rotated by the phase switching structure 32, whereby the yarn guides provided on the both guide rings 27 and 28 are operated. The phase of the cylinder 31 can be switched between two states. One of them is a first state in which the phase positions of the yarn path guide cylinders 31 in the guide rings 27 and 28 coincide as shown in FIG. The second is a second state (state indicated by a solid line and an imaginary line in FIG. 7) in which the phase position of the yarn guide tube 31 in each guide ring 27, 28 is evenly shifted in the circumferential direction. The shift amount of the yarn path guide tube 31 when the first state is switched to the second state is half of the adjacent pitch in the circumferential direction of the yarn path guide tube 31 in each guide ring 27 and 28. In this second state, the number of yarn path guide tubes 31 visually recognized when facing the fixed frame 20 is 24.

  In the first state, since the fiber bundle R is supplied from the yarn path guide tube 31 at the same phase position, the number of supplied fiber bundles R is twelve. In the second state, the yarn path guide cylinders 31 of the guide rings 27 and 28 are out of phase, so that helical winding is performed with the number of fibers supplied twice as many as the number of fiber bundles R in the first state.

  Incidentally, when the winding angle of the fiber bundle R is small, a large number of fiber bundles can be wound simultaneously without overlapping each other. However, as the winding angle increases, the number of fibers that are simultaneously wound while adjacent fiber bundles R do not overlap each other decreases. Therefore, when the winding angle of the fiber bundle R with respect to the mandrel M is changed, the guide ring 28 on the movable side is operated by the phase switching structure 32 to change the supply state of the fiber bundle R between the first state and the second state. By switching to, the number of fiber bundles R supplied to the mandrel M can be changed. Thus, by changing the supply state of the fiber bundle R, the helical winding process with two winding angles can be continuously performed without the trouble of changing the setup. The winding angle of the fiber bundle R can be changed by selecting the driving rotation number of the mandrel M and the feed speed of the support base 2, and is determined by the shape of the mandrel M, the size of the fiber bundle R, and the number of supply. The

  As described above, the phase positions of the yarn path guide cylinders 31 of the guide rings 27 and 28 in the first state coincide with each other. However, because the guide rings 27 and 28 are adjacently disposed along the axis of the mandrel M, the guide rings 27 and 28 are displaced in the axial direction of the yarn path guide tube 31. In particular, as shown by phantom lines in FIG. 5, when the yarn path guide cylinders 31 are mounted radially along the diameter lines of the guide rings 27 and 28, the cylinder center axis of each yarn path guide cylinder 31. Is greatly displaced in the axial direction of the mandrel M.

  This misalignment affects the winding angle of the fiber bundle R fed from each yarn path guide tube 31. Specifically, the winding angle of the fiber bundle R fed and guided by the yarn path guide cylinder 31 of the fixed side guide ring 27 is equal to the fiber bundle fed and guided by the yarn path guide cylinder 31 of the movable side guide ring 28. It becomes larger than the winding angle of R. This is because the distance between the position where the fiber bundle R circumscribes the mandrel M and the tube outlet 31a of each yarn path guide tube 31 differ by the amount of the previous deviation.

  Thus, if the winding angle of the fiber bundle R supplied from the yarn path guide tube 31 adjacent in the axial direction of the mandrel M is slightly different, there is a problem in the first state where the winding angle of the fiber bundle R is large. Arise. Since the helical winding is performed with the winding angle of the fiber bundle R supplied from each yarn path guide cylinder 31 being slightly different, the fiber bundle R is wound around the mandrel M in a state of being displaced in the circumferential direction without overlapping inside and outside. Because it is. As a result, irregularities occur on the surface of the wound layer. Incidentally, in the second state where the winding angle is small, the influence of the positional deviation in the axial direction of the yarn guide tube 31 hardly appears, so that a helical winding layer having no practical problem can be formed.

  In order to eliminate the deviation of the fiber bundle R in the first state, the threading guides 31a and 31a of the yarn path guide tubes 31 provided on the guide rings 27 and 28 as described above are connected to the rings 27. , 28 are arranged close to each other in the central portion in the adjacent direction. The smaller the adjacent interval between the two tube outlets 31a, the better. However, it is necessary to provide an allowance gap that can smoothly rotate and displace the guide ring 28 on the movable side.

  Hereinafter, the winding operation of the winding apparatus will be described. When performing the hoop winding, the winding table 16 is positioned at one end of the cylindrical portion of the mandrel M, and the fiber bundle R fed from each bobbin 17 is fixed to the surface of the mandrel M with an adhesive tape. At this time, a plurality of fiber bundles R are arranged in parallel along the peripheral surface of the mandrel M without a gap. In this state, while rotating the winding table 16, the frame 15 is moved toward the other end of the cylindrical portion of the mandrel M to form a first hoop winding layer H1. Subsequently, the second hoop winding layer H1 can be formed by moving the frame 15 in the reverse direction to one side end (winding start end side) of the cylindrical portion of the mandrel M. Further, when forming the hoop winding layer H1, the winding process is performed as many times as necessary in the same manner as described above.

  When forming the helical winding layer H2 on the outer surface of the hoop winding layer H1, the hoop winding device 3 is retracted to one end of the base 1 as shown in FIG. 2A. In the helical winding device 4, the movable guide ring 28 is rotated by the air cylinder 40 and held in the first state, and the phase positions of the yarn path guide cylinders 31 in the guide rings 27 and 28 are matched. In parallel, the support base 2 is moved and operated, the base end of the mouth of the mandrel M is made to face the inner surfaces of the guide rings 27 and 28 of the helical winding device 4, and the fiber bundle R drawn from each yarn path guide tube 31 is moved. Secure to the peripheral surface of the mouth with adhesive tape. At this time, the fiber bundle R drawn out from the yarn guide tube 31 having the same phase in each of the guide rings 27 and 28 is fixed to the peripheral surface of the mouth portion so as to overlap inside and outside.

  After the above preparatory work is completed, the support base 2 is moved at a constant speed while the chuck 10 and the mandrel M are rotationally driven to form the helical winding layer H2 on the outer surface of the previous hoop winding layer H1. Since the supply state of the fiber bundle R at this time is the first state, the helical winding is performed in a state where the winding angle of the fiber bundle R is large. In the present invention, the tube outlet 31a of the yarn path guide tube 31 having the same phase is made as close as possible. Therefore, even if helical winding is performed in a state where the winding angle is large, the fiber bundle R fed from the yarn path guide tube 31 having the same phase can be wound in a state of being overlapped inside and outside, and each fiber bundle R can be wound. The helical winding layer H2 can be appropriately formed without being displaced in the circumferential direction. FIG. 2B shows a state in which a hoop winding layer H1 is formed on the surface of the mandrel M on the right side of the helical winding device 4, and a helical winding layer H2 is formed on the outer surface of the hoop winding layer H1 on the left side of the helical winding device 4. Yes.

  In the state where the entire mandrel M passes through the helical winding bed 21 in one direction from the state shown in FIG. 2B and further passes through in the opposite direction, two helical winding layers H2 are formed inside and outside. Similarly, by carrying out helical winding while moving the support base 2 in the opposite direction, two helical winding layers H2 are formed on the outer surface of the preceding helical winding layer H2. Further, when forming the helical winding layer H2, the winding process is performed as many times as necessary in the same manner as described above.

  The helical winding process with a small winding angle can be performed continuously with the helical winding process with a large winding angle. In that case, the movable guide ring 28 is displaced in the clockwise direction by the air cylinder 40 and held in the second state, and the phase position of the yarn path guide cylinder 31 in each of the guide rings 27 and 28 is varied. deep. By evenly shifting the phase position of each yarn path guide tube 31 in the circumferential direction, all the fiber bundles R are arranged in parallel along the circumferential surface of the helical winding layer H2 without a gap. In this state, the helical winding layer H2 having a small winding angle can be formed by moving the support base 2 in one direction at a constant speed while rotationally driving the chuck 10 and the mandrel M.

  Further, by performing helical winding while moving the support base 2 in the opposite direction, the helical winding layer H2 having a small winding angle can be formed in the same manner. When the helical winding process is completed, the fiber bundle R is cut, and then the cut end is fixed to the mouth with an adhesive tape. As described above, after alternately performing the hoop winding and the helical winding, the mandrel M is removed from the support base 2 and heat-treated, and the resin impregnated in the fiber bundle R is cured, whereby the reinforcing layer and the mandrel are cured. A pressure vessel consisting of M is obtained.

  Other than the above embodiment, the yarn path guide cylinder 31 does not need to be formed in a straight cylinder shape, and the cylinder outlet 31a side may be bent toward the adjacent yarn path guide cylinder 31 side. The phase switching structure 32 can be provided between the adjacent guide rings 27 and 28. As the operating device 40 for rotating the movable guide ring 28, a solenoid, an electric cylinder, or the like can be applied in addition to the air cylinder. The positioning structure can be formed as a dedicated structure different from the connection structure of each guide ring.

W Winding device S Fiber bundle supply device M Mandrel R Fiber bundle Cm Flat state maintaining means 60 Direction control means 20 Fixed frame 21 Helical winding head 27 Guide ring 28 Guide ring 31 Yarn guide tube 31a Tube outlet 31b Tube inlet 31c Flat angle Hole 32 phase switching mechanism

Claims (5)

In the filament winding apparatus for winding the fiber bundle around the mandrel by hoop winding and helical winding,
Supporting the mandrel, reciprocating in the axial direction of the mandrel, and a support base for rotating the mandrel;
A hoop winding device that supports a bobbin that supplies the fiber bundle to the mandrel, can reciprocate in the axial direction, and rotates around the mandrel;
A helical winding device that is fixedly installed and supplies the plurality of fiber bundles to the mandrel,
When the hoop winding is performed, the support base is stationary in the axial direction and the rotation direction, and the hoop winding device rotates while moving in the axial direction so that the fiber bundle is wound on the peripheral surface of the mandrel. Wound with hoop,
When performing helical winding, the support base rotates the mandrel while moving in the axial direction and winds the fiber bundle around the mandrel by helical winding.   2. The filament winding according to claim 1, wherein the hoop winding device includes a frame that is reciprocally movable in the axial direction, and a winding table that is supported by the frame and rotates around the mandrel. apparatus. The helical winding device includes a fixed frame erected on a base, and a helical winding head supported by the fixed frame,
3. The filament according to claim 1, wherein the helical winding head includes a plurality of guide rings arranged around the mandrel and coupled in the axial direction so as to be relatively rotatable in a circumferential direction. Winding device. The plurality of guide rings includes a fixed-side guide ring fixed to the fixed frame, and a movable-side guide ring connected to the fixed-side guide ring so as to be relatively rotatable.
The filament winding apparatus according to claim 3, wherein a supply state of the fiber bundle to the mandrel is switched by relatively rotating the movable guide ring.   The said helical winding head is provided with each said guide ring, and is provided with the some yarn path guide cylinder arrange | positioned at equal intervals along the circumferential direction of each said guide ring. 4. The filament winding apparatus according to 4.

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