JP2017209902A - Filament winding device - Google Patents

Abstract

A filament winding apparatus capable of adjusting the width of a fiber bundle is provided.
A filament winding apparatus 1 according to the present invention includes a guide portion for winding a fiber bundle W around a liner 2, and the guide portion is a fiber upstream in the conveying direction of the fiber bundle W as viewed from the outlet of the guide portion. It has a plurality of pins 20 provided at the end in the width direction of the bundle W and movable in the width direction, and the plurality of pins 20 adjusts the distance between the pins 20 by moving in the width direction of the fiber bundle W. To do.
[Selection] Figure 2

Description

  The present invention relates to a filament winding apparatus.

  2. Description of the Related Art Conventionally, a filament winding apparatus that winds reinforcing fibers around an outer peripheral surface of a liner is known. Such a filament winding apparatus winds the reinforcing fiber around the outer peripheral surface of the liner while drawing the reinforcing fiber from the bobbin. The reinforcing fiber drawn out from the bobbin is guided to the liner through a plurality of guide portions. The liner is a sealed cylindrical container having a substantially cylindrical body portion and a substantially hemispherical dome portion that closes both ends of the body portion.

  In the filament winding apparatus, when a bundle of reinforcing fibers (hereinafter also referred to as a fiber bundle) is wound around a liner, there is a problem that a void is generated at a step due to an uneven thickness in the width direction of the fiber bundle. In order to solve this problem, for example, in Patent Document 1 below, a comb member that regulates the width of the fiber is provided downstream of the guide portion. By providing the comb member, each of the plurality of fiber bundles supplied through the guide portion passes through the comb member, and after the interval is fixed, is guided to the liner. According to Patent Document 1 described below, it is possible to prevent the occurrence of gaps and overlaps between fiber bundles and to stabilize the quality of the product.

JP 2007-276193 A

  In the above comb member, although the interval between the fiber bundles can be made constant, the position of the fibers cannot be arbitrarily determined, and thus the width of the fiber bundle cannot be controlled.

  This invention is made | formed in view of such a subject, The objective is to provide the filament winding apparatus which can adjust the width | variety of a fiber bundle.

  In order to solve the above problems, a filament winding apparatus according to the present invention is a filament winding apparatus that manufactures a high-pressure tank by winding a fiber bundle around an outer periphery of a liner, and includes a guide unit that winds the fiber bundle around the liner. The guide portion has a plurality of pins that are provided at an end portion in the width direction of the fiber bundle upstream of the conveyance direction of the fiber bundle as viewed from the exit of the guide portion and are movable in the width direction, The plurality of pins adjusts the interval between the pins by moving in the width direction of the fiber bundle.

  In this invention, the guide part which guides a fiber bundle to a liner is provided with a plurality of pins arranged at the end in the width direction of the fiber bundle and movable in the width direction, and the interval between the pins is adjusted. By providing such a configuration, the positions of the fibers can be determined, and the width of the fiber bundle can be adjusted.

  ADVANTAGE OF THE INVENTION According to this invention, the filament winding apparatus which can adjust the width | variety of a fiber bundle can be provided.

It is the schematic of a filament winding apparatus. It is a schematic perspective view which shows the structure of the ikuchi guide part which aligns and winds a fiber around a liner. It is explanatory drawing which shows a mode that meandering is formed in a part of layer of the laminated | stacked fiber bundle. It is a graph which shows the result of having verified the generation | occurrence | production amount of the fiber distortion when changing a winding position, fiber width, and an angle from a nominal value to maximum tolerance and minimum tolerance. It is a figure for demonstrating the structure of the neck part periphery of a nozzle | cap | die.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that the following description of the preferred embodiment is merely an example, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a configuration diagram of a filament winding apparatus 1 (hereinafter referred to as “FW apparatus 1”) according to an embodiment of the present invention. FIG. 1 also shows a liner 2 that is not a component of the FW device 1 but forms the shape of a molded product.

  The FW device 1 includes a fiber transport path unit 11 for transporting a fiber bundle W (for example, carbon fibers previously impregnated with resin), and the fiber transport path unit 11 sets and unwinds the fiber bundle W. The unwinding unit 90, the plurality of rollers R for conveying the fiber bundle W from the upstream side (unwinding unit 90 side) to the downstream side (liner 2 side), and the unrolled fiber bundle W are aligned to the liner 2. And an ikuchi guide unit 10 for guiding.

  The fiber bundle W unwound from the unwinding section 90 passes through the rollers R and the like, passes through the ikuchi guide section 10, and is wound around the liner 2. The liner 2 is rotationally driven around its longitudinal axis, and the fiber bundle W is tensioned by the rotational driving of the liner 2, and the fiber bundle W is tightly wound around the liner 2 under the tension. .

  The fiber conveyance path | route part 11 in which the fiber bundle W is conveyed is provided with the following structures. Specifically, as shown in FIG. 1, the roller R is arranged so that the fiber bundle W is applied to the roller R at a right angle.

  Further, when the angle of the roller R is rotated by 90 °, the roller R is arranged so that the distance between the rollers R is 250 mm or more.

  The fiber bundle W is conveyed to the downstream side by the roller R arranged as described above, so that the fiber bundle W is fed to the ikuchi guide unit 10 in a state where the width of the fiber bundle W is wide (the width of the fiber bundle W is maintained). W is guided (see area B in FIG. 2). The ikuchi guide portion 10 has a function of aligning a plurality of fiber bundles W in the width direction and guiding the bundle 2 to the liner 2, and includes a moving mechanism that moves along the outer shape of the liner 2. The configuration of the ikuchi guide unit 10 will be described later with reference to FIG.

  The liner 2 is a core material that shapes the shape of the molded product. For example, when molding a high-pressure tank, the liner 2 is a cylinder corresponding to the inner diameter of the tank. The liner 2 is supported so that its longitudinal axis is rotatable, and is rotated around the longitudinal axis by a rotational drive mechanism. The plurality of fiber bundles W aligned and aligned in the width direction by the ikuchi guide unit 10 are fixed to the liner 2 at their ends, and the fiber bundle W is rotated in the longitudinal axis direction of the liner 2 by being driven to rotate. Are wound around the outer periphery. When the fiber bundle W is wound around the liner 2 with a predetermined number of turns and the shape of the product is made, a curing process is performed thereafter, the epoxy resin is cured, and a fiber-reinforced resin composite product is formed.

  Next, the configuration of the ikuchi guide unit 10 that aligns the fiber bundles W that are conveyed via the plurality of rollers R shown in FIG. FIG. 2 is a schematic perspective view showing the configuration of the ikuchi guide 10. The driving of the roller R and the pin 20 is controlled by a control unit (not shown).

  The ikuchi guide unit 10 is movably disposed at the end of the fiber bundle W in the width direction (direction perpendicular to the fiber bundle W conveyance direction) upstream of the fiber bundle W conveyance direction when viewed from the outlet of the ikuchi guide unit 10. A plurality of pins 20 (see area C in FIG. 2). By adjusting the distance between the pins 20, the positions of the fibers can be determined, and the width (interfiber pitch) of the fiber bundle W can be adjusted. In the present embodiment, the four pins 20 are arranged on both sides in the width direction of the fiber bundle W. However, the present invention is not limited to this example, and the number of the pins 20 can be appropriately changed as long as the inter-fiber pitch can be adjusted. .

  The ikuchi guide unit 10 includes a plurality of rollers R for holding the fiber bundle W in an S-shape and maintaining the inter-fiber pitch by friction (see the area D in FIG. 2). Of the two rollers R arranged in the vicinity of the area D in FIG. 2, the upstream roller (left side in FIG. 2) is called the front roller Rd1, and the downstream roller is called the rear roller Rd2. W contacts the lower outer periphery of the front roller Rd1 and the upper outer periphery of the rear roller Rd2 (that is, hangs on an S-shape), and is conveyed downstream.

  Further, the ikuchi guide unit 10 includes a plurality of rollers R that rotate the roller R and hang the fiber bundle W on the S-shape in order to maintain the position of the fibers (see the area E in FIG. 2). Of the three rollers R arranged near the area E in FIG. 2, the upstream roller is referred to as the front roller Re1, the central roller as the central roller Re2, and the downstream roller as the rear roller Re3. The fiber bundle W is in contact with the lower outer periphery of the front roller Re1, the upper outer periphery of the central roller Re2, and the lower outer periphery of the rear roller Re3 (that is, hung on an S-shape), and the downstream liner 2 (see FIG. 1).

  By the way, when the fiber bundle W is wound around the base provided at the end portion of the liner, the fiber bundle is laminated to a position closer to the central axis side than the helical layer serving as a base. A part of the layer meanders in the thickness direction (see FIG. 3). This is because nonuniformity of the thickness of the underlying helical layer is transferred, and the meandering layer cannot exhibit sufficient strength. As a result, the design strength may not be achieved in the dome portion of the tank container.

  Therefore, the present inventors conducted research for improving the strength by suppressing the meandering of the layer as described above. Specifically, as shown in FIG. 4, the inventors changed the winding position, fiber bundle, and angle from the nominal value to three conditions of maximum tolerance and minimum tolerance, respectively, and verified the amount of fiber strain generated. did.

  FIG. 4A is a graph showing fiber strain when the winding position, fiber bundle, and angle in the first layer are each changed from the nominal value to three conditions of maximum tolerance and minimum tolerance. FIG. 4B is a graph showing the fiber strain when the position, fiber bundle, and angle in the second layer are changed from the nominal value to the three conditions of maximum tolerance and minimum tolerance.

  As shown in FIG. 4A, the present inventors have found that the thickness (width) of the fiber bundle in the first layer greatly contributes to strength, that is, the fiber strain can be reduced by increasing the width of the fiber bundle. Found. In other words, if the width of the fiber bundle can be adjusted, the knowledge that the unevenness of the thickness of the fiber bundle laminated on the dome (such as the periphery of the base) as described with reference to FIG. The present inventors have found out.

  Based on the knowledge found by the inventors, the present embodiment guides the fiber bundle W as follows. That is, in the FW device 1 of the present embodiment, the fiber bundle W is guided to the ikuchi guide unit 10 while maintaining the width of the fiber bundle W, and the fiber bundle W is thickened from the ikuchi guide unit 10 toward the liner 2. The fiber bundle W is guided to the liner 2 while maintaining the thickness. Thereby, since the fiber bundle W supplied from the FW device 1 is laminated on the outer periphery of the liner 2 in a state where the width is maintained, the fiber strain generated due to the thickness of the fiber bundle is reduced. Can do. In other words, the occurrence of meandering (see FIG. 3) in a part of the reinforcing layer is suppressed due to the non-uniformity of the thickness of the fiber bundle laminated on the dome portion (around the base), which has been a problem in the past. As a result, for example, in order to ensure the strength as designed in the dome portion, the fiber is not laminated more than the designed numerical value, so that the thickness of the fiber layer is reduced. Thereby, intensity | strength can be improved, aiming at weight reduction of the high pressure tank produced using the FW apparatus 1. FIG.

  As a result of adjusting the width (interfiber pitch) of the fiber bundle W by the ikuchi guide part 10, it is preferable that the fiber is wound around the dome part 2b of the liner 2 as follows. This will be described in detail with reference to FIG.

  As shown in FIG. 5, the liner 2 has a substantially cylindrical body portion 2a and dome portions 2b provided at both ends of the body portion 2a, and a base 3 is provided on the top of the dome portion 2b.

  A fiber bundle is wound around the outer periphery of the liner 2 as follows. Specifically, it is a layer (hereinafter referred to as “neck part separation layer”) where the winding position is more than the fiber bundle width from the neck part from the narrowest part of the base 3 (neck part shown in FIG. 5). When the layer to be wound next is wound at a position closer to the neck than the neck separation layer, the width of the fiber bundle of the neck separation layer maintains a thickness that is 1/2 or more times that of the body portion 2a. Thereby, the meandering of the thickness direction (up-down direction in FIG. 3) of the layer wound next to the neck part separation layer can be reduced. For this reason, as a result of improving the strength of the CFRP layer and eliminating the need for winding excess fibers, it is possible to reduce the weight of the high-pressure tank.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. Each element included in each of the specific examples described above and their arrangement, material, condition, shape, size, and the like are not limited to those illustrated, and can be appropriately changed.

1: Filament winding device 2: Liner 2a: Body part 2b: Dome part 3: Base 10: Ikuchi guide part (guide part)
11: Fiber conveyance path part 20: Pin 90: Unwinding part R: Roller W: Fiber bundle

Claims (1)

In a filament winding apparatus for manufacturing a high-pressure tank by winding a fiber bundle around the outer periphery of a liner,
A guide portion for winding the fiber bundle around the liner;
The guide portion has a plurality of pins provided at an end in the width direction of the fiber bundle upstream of the fiber bundle in the conveyance direction when viewed from the outlet of the guide portion and movable in the width direction;
The filament winding apparatus according to claim 1, wherein the plurality of pins are moved in the width direction of the fiber bundle to adjust intervals between the pins.

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