JP2008296411A - Method and device for manufacturing fiber reinforced resin container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a fiber reinforced resin container having a portion of a layer sufficiently impregnated with a resin without excessively increasing the dimension in a method and a device for manufacturing the fiber reinforced resin container. <P>SOLUTION: A liner rotating device 36 for wrapping a liner 12 on resin impregnated fibers 32 obtained by impregnating carbon fibers 30 with the resin, and a resin replenishing tank 22 for storing the resin provided on a lower side of a portion of the liner rotating device 36 where the liner 12 is disposed, are provided. The resin replenishing tank 22 is movable in the vertical direction by a replenishing tank vertical movement mechanism 38. By changing the vertical position of the resin replenishing tank 22 according to the number of wrapped layers of the resin impregnated fibers 32 wrapped around the liner 12, the amount of resin impregnated at a portion toward the inner diameter of the plurality of wrapped layers of the resin impregnated fibers 32 wrapped around the liner 12 is made larger than the amount of resin impregnated in at least a portion of the other portions of the wrapped layers. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a fiber reinforced resin product that forms a fiber reinforced resin container by wrapping resin impregnated fiber obtained by impregnating a resin sent from a fiber supply unit with resin in a resin bath around a liner that forms the shape of the product. The present invention relates to a container manufacturing method and a fiber reinforced resin container manufacturing apparatus.

  Conventionally, it has been considered to form a fiber reinforced resin container using a fiber reinforced resin. For example, as a method of molding a fiber reinforced resin container, a sufficiently strong fiber, such as carbon fiber, is impregnated with a liquid thermosetting resin, wound around a liner that forms the shape of the product, and thermoset. It is considered to heat-cure the functional resin. The carbon fiber is a so-called filament winding method in which an organic polymer fiber is baked at a high temperature of, for example, 3000 ° C. and extremely high in strength, and therefore, for example, a high-pressure tank that is a fiber-reinforced resin container is wound with a carbon fiber around a liner. Can be manufactured. As a method for impregnating carbon fibers with resin, it is considered that carbon fiber bundles are impregnated with resin by passing the carbon fiber bundles through a resin container filled with a temperature-controlled liquid thermosetting resin. .

  Patent Document 1 further discloses a mandrel for continuously winding fiber reinforced plastic reinforced with a reinforcing fiber material by rotation, and a reinforcing fiber material provided under the mandrel and impregnated with a resin in a pre-impregnation layer. An apparatus for manufacturing a fiber reinforced plastic product comprising an impregnation tank for impregnating a resin liquid is described. In the impregnation tank, the liquid level of the resin liquid is adjusted by the liquid level adjusting means so that the liquid level of the resin liquid and the lowest end of the mandrel are in contact with each other.

JP 2001-301047 A

  In the case of the apparatus for producing a fiber reinforced plastic product described in Patent Document 1, it is considered that only the reinforcing fibers constituting a part of the fiber reinforced plastic are impregnated with the resin by the impregnation layer provided under the mandrel. It has not been. For this reason, in the case of the manufacturing apparatus described in Patent Document 1, it is sufficient for some layers of the fiber reinforced resin that require a large amount of resin without excessively increasing the size of the fiber reinforced resin container. It may not be possible to impregnate a new resin.

  For example, in general, when a tank, which is a container made of fiber reinforced resin (FRP) such as carbon fiber reinforced resin (CFRP) using carbon fiber, is molded by a filament winding method, a thermosetting resin is applied to the carbon fiber. A step of winding the impregnated resin-impregnated fiber around several to several tens of layers around the liner is performed. Thus, in the process of winding the resin-impregnated fiber around the liner, tension is applied to the fiber at the time of winding the resin-impregnated fiber with the liner, and even though the resin is impregnated between the fibers because of the tightening effect due to the tension. The resin tends to ooze out from the plurality of fibers constituting the inner layer of the fiber reinforced resin to the outer layer side. That is, as the number of the resin-impregnated fibers is increased, the resin oozes out between a plurality of fibers constituting the inner layer of the fiber reinforced resin and occupies the entire volume as it goes from the radially outer side to the inner side. The fiber volume content Vf (%), which is the ratio of fibers, tends to increase. Vf means that the higher the amount, the smaller the amount of resin, and the lower the amount, the greater the amount of resin.

  FIG. 4 shows a cross section of an example of a carbon fiber reinforced resin tank made by a conventionally considered method, a partially enlarged schematic cross section of the tank (a), and an outer layer portion of (a). (B) which is the expanded schematic cross section, and (c) which is the schematic cross section which further expanded the inner-layer part of (a) are shown. The tank 10 shown in FIG. 4 has a fiber reinforced resin 14 provided around the liner 12 by winding resin-impregnated fibers obtained by impregnating carbon fibers with resin around a resin liner 12 and heat-curing the resin. Yes. Also, the caps 16 and 18 are fixed to both ends of the tank 10 in the longitudinal direction. In addition, by wrapping a resin impregnated fiber that becomes a fiber reinforced resin 14 that is CFRP around the outer side of the fiber reinforced resin 14, the glass fiber impregnated with the resin is wound, and then simultaneously heated and cured, that is, baked. A glass layer 20 which is a GFRP (glass fiber reinforced resin) layer is provided.

  4B and 4C, the carbon fiber is represented by white circles, and the resin is represented by black portions. As shown in FIG. 4 (b), the outer layer portion of the fiber reinforced resin 14 has a large proportion of the resin amount in the whole, whereas the inner layer portion of the fiber reinforced resin 14 as shown in FIG. 4 (c). Then, the ratio of the resin amount to the whole is small. That is, the fiber volume content Vf is higher on the inner layer side than on the outer layer side. Further, such a tendency becomes more remarkable when the viscosity of the resin impregnated between the fibers is low because the amount of the resin oozing out increases.

  Further, the tank 10 made of the fiber reinforced resin 14 increases the thickness of the fiber reinforced resin 14 in order to ensure strength, that is, increases the number of winding layers around which the resin-impregnated fiber is wound around the liner 12 as the operating pressure increases. Since it is necessary, the tightening effect is further increased, and the increase in Vf on the inner layer side of the fiber reinforced resin 14 becomes more remarkable. And, since the inner layer tends to be subjected to the greatest stress due to the pressure increase in the tank 10, when the Vf of the inner layer is excessively high, the fatigue durability performance of the tank 10 is greatly reduced, and the fiber It cannot be said that there is no possibility of damage such as cracks occurring in the inner layer portion of the tank 10 made of the reinforced resin 14. For this reason, realization of means capable of optimally adjusting Vf of the inner layer portion of the fiber reinforced resin 14 is desired.

  On the other hand, if the Vf of the fiber reinforced resin 14 is uniformly reduced including not only the inner layer but also the outer layer, the resin amount increases as a whole, which causes the outer diameter of the tank 10 to increase. Since the tank 10 is particularly desired to reduce the outer diameter of the tank 10 when used in a situation where there are many spatial restrictions, such as when used for automobiles, only the inner layer portion of the tank 10 is used. Therefore, it is desired to reduce the Vf of the resin effectively and increase the amount of resin only in the inner layer portion.

  On the other hand, it can be said that the fiber reinforced plastic product manufacturing apparatus described in Patent Document 1 does not have the possibility of improving the impregnation state of the resin to the fibers and suppressing the generation of fine voids. Absent. However, as described above, the manufacturing apparatus described in Patent Document 1 does not excessively increase the size of the fiber reinforced resin container, and some of the fiber reinforced resin requires a large amount of resin. There is a possibility that a sufficient amount of resin cannot be impregnated into a layer, for example, a layer near the inner diameter.

  An object of the present invention is to provide a fiber reinforced resin container in which a sufficient amount of resin is impregnated in some layers without excessively increasing dimensions in a fiber reinforced resin container manufacturing method and a fiber reinforced resin container manufacturing apparatus. Is to get.

  The method for producing a fiber-reinforced resin container according to the present invention is a method of reinforcing a fiber by winding resin-impregnated fiber obtained by impregnating a resin sent from a fiber supply unit with a resin bath around a liner that forms the shape of a product. A method of manufacturing a fiber-reinforced resin container for molding a resin container, the number of wound layers of resin-impregnated fibers wound around the liner at the upper and lower positions of a resin replenishment tank placed under the liner and containing the resin The amount of the resin impregnated in a part of the wound layer of the plurality of resin-impregnated fibers wound around the liner is more than the amount of the resin impregnated in at least a part of the other part of the wound layer. It is a manufacturing method of the fiber reinforced resin container characterized by making it increase.

  Preferably, in the step of winding the resin-impregnated fiber around the liner, the upper and lower positions of the resin replenishing tank are set to a predetermined height only when the number of wound layers of the plurality of resin-impregnated fibers wound around the liner is equal to or less than a predetermined value. By the above, the amount of the resin impregnated in the portion closer to the inner diameter of the wound layer of the plurality of resin-impregnated fibers wound around the liner is more than the amount of the resin impregnated in at least a part of the other portion of the wound layer. Try to increase.

  More preferably, the resin impregnation wound around the liner is moved by moving the resin replenishment tank in the horizontal direction so that the resin scraping portion provided at the top of the resin replenishment tank moves far and away from the outer peripheral surface of the liner. The excess resin adhering to the fiber can be scraped off.

  Further, the fiber reinforced resin container manufacturing apparatus according to the present invention is a fiber reinforced resin container manufacturing apparatus for manufacturing a fiber reinforced resin container by the above-described fiber reinforced resin container manufacturing method according to the present invention, A fiber supply unit, a resin bath for impregnating the fiber sent from the fiber supply unit with resin, a winding unit for winding the resin-impregnated fiber after passing through the resin bath around a liner that forms the shape of the container, and a liner for the winding unit are arranged A resin replenishing tank provided on the lower side of the part, a replenishing tank vertical movement mechanism for moving the resin replenishing tank containing the resin in the vertical direction, and a part of a wound layer of a plurality of resin-impregnated fibers wound around the liner Replenisher tank vertical movement mechanism control means for controlling the drive of the replenisher tank vertical movement mechanism so that the amount of resin applied is greater than the amount of resin impregnated in at least a part of the other part of the wound layer Is a fiber-reinforced resin container manufacturing apparatus characterized by comprising a.

  Preferably, the replenishing tank vertical movement mechanism control means lowers the resin replenishing tank when the number of wound layers of the resin-impregnated fiber wound around the liner exceeds a predetermined value, and the resin-impregnated fiber wound around the liner and the resin replenishing tank. The drive of the replenishing tank vertical movement mechanism is controlled so that the resin inside does not come into contact.

  More preferably, a resin scraping portion provided at an upper portion of the resin replenishing tank and a replenishing tank horizontal moving mechanism for moving the resin replenishing tank in the horizontal direction are provided.

  According to the method for manufacturing a fiber-reinforced resin container and the apparatus for manufacturing a fiber-reinforced resin according to the present invention, the resin impregnation in which the upper and lower positions of the resin replenishing tank placed under the liner and wound with the resin are wound around the liner The amount of resin impregnated in a part of a plurality of resin-impregnated fiber wound layers wound around a liner is impregnated in at least a part of the other part of the wound layer by changing the number according to the number of wound layers of the fiber. The amount of resin in the fiber reinforced resin needs to be large without excessively increasing the overall resin amount and excessively increasing the size of the fiber reinforced resin container. A fiber reinforced resin container in which a part of the layer is impregnated with sufficient resin can be obtained. For example, the amount of resin on the inner layer side can be sufficiently ensured despite the tendency of the resin to ooze from the plurality of fibers from the inner layer side to the outer layer side as the resin-impregnated fiber is wound around the liner. Also, when the resin-impregnated fiber passes through, for example, a guide part or a roller before being sent from the resin bath to the part wound around the liner, the resin tends to be removed or drooped due to squeezing or the like. However, according to the present invention, the resin-impregnated fiber can be replenished with a resin replenishing tank, and the amount of resin on the inner layer side can be sufficiently secured. Moreover, since it is not necessary to excessively increase the total resin amount, it is possible to prevent the outer diameter of the fiber-reinforced resin container from becoming excessively large. As a result, a fiber reinforced resin container in which a sufficient amount of resin is impregnated in a part of the fiber reinforced resin that requires a large amount of the resin without excessively increasing the size of the fiber reinforced resin container. can get. For example, when a sufficient amount of resin on the inner layer side can be secured, the fatigue durability performance of the fiber reinforced resin container can be increased.

  Further, the resin replenishing tank was moved in the horizontal direction so that the resin scraping portion provided at the upper part of the resin replenishing tank moved far and away relative to the outer peripheral surface of the liner, and thereby adhered to the resin-impregnated fibers wound around the liner. According to the configuration that makes it possible to scrape excess resin, the resin adhesion amount of the resin-impregnated fibers wound around the liner can be reduced without providing a mechanism for moving the resin scraping unit separately from the mechanism for moving the resin replenishing tank. It is easy to adjust accurately.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The materials, molding conditions, and the like described below are examples for explanation, and other appropriate materials and molding conditions can be adopted in accordance with product specifications and the like. For example, although carbon fiber is demonstrated as a fiber, the fiber which has other suitable intensity | strength can also be used. Moreover, although thermosetting epoxy resin is demonstrated as resin, resin which has other suitable joint strength can also be used. In the following, the case where the fiber reinforced resin container is a high pressure gas tank will be described, but the fiber reinforced resin container may be other than the high pressure gas tank.

  FIG. 1 is a partial configuration diagram of a tank manufacturing apparatus, which is a fiber reinforced resin container manufacturing apparatus that manufactures a high-pressure gas tank by a method for manufacturing a fiber reinforced resin container according to an embodiment of the present invention. 2 is a diagram showing a part of the liner 12 and the resin replenishing tank 22 and the ikuchi guide portion 24 of FIG. 1 as viewed from the left side to the right side in FIG. As shown in FIG. 1, the tank manufacturing apparatus includes a molding unit 26 and a control device 28 that is a control unit. In FIGS. 1 and 2, the liner 12 that forms the shape of the molded product is also illustrated, although it is not a component of the tank manufacturing apparatus.

  The molding unit 26 sets the carbon fiber 30 as a raw material, that is, a creel stand (not shown) that is a fiber supply unit that performs winding and feeding, and a plurality of carbon fibers 30 fed from the creel stand are liquid thermoset. Resin bath 34 that is impregnated with a type epoxy resin (hereinafter simply referred to as “epoxy resin”) and supplied as a plurality of resin-impregnated fibers 32, and a plurality of resin-impregnated fibers 32 that have passed through resin bus 34 are aligned to form liner 12. And a liner rotating device 36 that is a winding unit that winds the plurality of resin-impregnated fibers 32 around the liner 12 that forms the shape of the high-pressure gas tank, which is a fiber-reinforced resin container. Further, the molding unit 26 includes a resin replenishing tank 22 provided below a portion of the liner rotating device 36 where the liner 12 is disposed, a replenishing tank vertical moving mechanism 38 that moves the resin replenishing tank 22 in the vertical direction, and a resin. A replenishing tank horizontal movement mechanism 40 (FIG. 2) for moving the replenishing tank 22 in the horizontal direction is provided.

  The carbon fiber 30 as a raw material is made of a material obtained by firing organic polymer fibers at a high temperature of about 3000 ° C., and for example, about 24,000 pieces of the fired material are collected by being twisted or gathered in a straight line to obtain a binder resin. It is possible to use a flat sheet or fiber bundle having a thickness of about 200 μm, a width of about 3 mm to 10 mm, or a width of about 4 mm to 5 mm.

  The creel stand is an unwinding stand having a function of setting a plurality of bobbins each having a sheet-like carbon fiber 30 wound around a paper tube and unwinding using a fixed pulley or the like. Three to four resin-impregnated fibers 32 are wound around the liner 12 by parallel winding in which three to four fibers are aligned.

  The carbon fiber 30 passes from the creel stand via several rollers and the like, passes through the ikuchi guide portion 24, is wound around the liner 12, and the liner 12 is rotationally driven around the longitudinal axis of the liner 12 by the liner rotating device 36. . Here, the liner rotating device 36 has a function of a fiber winding unit. Therefore, the carbon fiber 30 is tensioned by the rotational drive of the liner 12, and the resin-impregnated fiber 32 is tightly wound around the liner 12 under the tension. The liner rotating device 36 and the liner 12 constitute a fiber winding forming unit. Further, in the plurality of wound layers of the resin-impregnated fibers 32 wound around the liner 12, the hoop winding and the helical winding are repeated alternately from the inner diameter side to the outer diameter side. As shown in FIG. 1, the hoop winding is to wind the resin-impregnated fiber 32 in the substantially circumferential direction of the liner 12, and the helical winding is in a direction greatly inclined with respect to the circumferential direction of the liner 12 rather than the hoop winding. A resin-impregnated fiber 32 is wound around the liner 12. When the fiber-reinforced resin is configured by winding the resin-impregnated fibers 32 in this manner, the cross section of the fiber-reinforced resin becomes a plurality of layers as shown in FIG. That is, since the directions of the fibers constituting the fiber reinforced resin are different between the layers adjacent in the radial direction, the cross section appears as a plurality of layers even after thermosetting.

  Returning to FIG. 1, the resin bath 34 has a function of impregnating three to four carbon fibers 30 with a liquid resin, a resin tank 42 filled with a liquid epoxy resin, and a part of the resin tank 42. The resin scraping roller 44 is immersed, and the front roller and the rear roller disposed before and after the resin scraping roller 44 are provided.

  The carbon fiber 30 is stretched along the lower outer periphery of the front roller and the rear roller and the upper outer periphery of the resin scraping roller 44, and is drawn out from the resin bath 34 to the rear roller side. The resin scraping roller 44 rotates to attach a liquid epoxy resin from the resin tank 42 to the outer periphery, and the carbon fiber 30 passes through the upper side thereof so that the resin adheres to and impregnates the carbon fiber 30. .

  Moreover, the resin tank 42 is provided with a heater (not shown), and the epoxy resin is heated in a range of, for example, 40 ° C. to 50 ° C. to become a liquid state. The viscosity of the liquid epoxy resin is controlled by controlling its temperature. The resin temperature in the resin tank 42 can be measured by a resin temperature sensor (not shown).

  Three to four resin-impregnated fibers 32 drawn from the resin bath 34 are introduced into the ikuchi guide portion 24. The ikuchi guide unit 24 has a function of guiding a plurality of resin-impregnated fibers 32 so as to be easily wound around the liner 12, and aligns the plurality of resin-impregnated fibers 32 toward the liner 12, and aligns the aligner with the liner. 12 and a moving mechanism for moving along the outer shape. The alignment port is moved in the longitudinal axis direction of the liner 12 and in the width direction of the liner 12 (front and back direction in FIG. 1, left and right direction in FIG. 2).

  The liner 12 serves as a core material that shapes the shape of the molded product. For example, when molding a high-pressure gas tank, the liner 12 is a cylinder corresponding to the inner diameter of the tank. For example, a hard resin can be used as the material of the cylinder. The diameter of the cylinder is, for example, about 30 cm, and the thickness thereof can be about several mm. The liner 12 is supported by the liner rotating device 36 so as to be rotatable about the longitudinal axis, and is rotated around the longitudinal axis by a rotational drive mechanism. The resin-impregnated fiber 32 is wound around the outer periphery of the liner 12 when the liner 12 is driven to rotate. The amount wound around the liner 12 is about several to ten and several millimeters as the thickness on the outer periphery of the liner 12. The resin-impregnated fiber 32 impregnated with the epoxy resin is wound around the liner 12 with a predetermined number of turns, for example, the number of turns 30, and when the shape of the product is formed, the curing process is performed thereafter, the epoxy resin is cured, and the fiber is reinforced. A high-pressure gas tank that is a resin container is molded.

  The resin replenishing tank 22 is provided below the portion of the liner rotating device 36 where the liner 12 is disposed. The resin replenishing tank 22 closes the bottom part of the peripheral wall part having a rectangular cross section with a bottom plate part, and the upper end edge of one side wall part 46 (FIG. 2) constituting the peripheral wall part is formed above the resin replenishing tank 22. The provided resin scraping portion is used. The side wall portion 46 has an inner surface parallel to the longitudinal axis of the liner 12. A liquid epoxy resin 48 is accommodated inside the resin replenishing tank 22. The resin replenishing tank 22 has a depth equal to or greater than the thickness of the fiber reinforced resin constituted by the resin-impregnated fibers 32. Similar to the resin tank 42, the resin replenishing tank 22 includes a heater, controls the temperature so that the contained epoxy resin 48 is heated to a liquid state within a range of 40 ° C. to 50 ° C., for example, and performs viscosity management. It can also be done. Further, a gap detection sensor 50 is fixed to the outside (left side in FIG. 2) of the side wall portion 46 of the resin replenishing tank 22, and between the outer peripheral surface of the resin-impregnated fibers 32 wound around the liner 12 by the gap detection sensor 50. The gap can be detected. The detection value of the gap detection sensor 50 is input to the control device 28 that is a control unit.

  Further, the resin replenishing tank 22 is moved in the vertical direction and the width direction of the liner 12 (front and back direction in FIG. 1, and left and right direction in FIG. 2) by a replenishing tank vertical movement mechanism 38 and a replenishing tank horizontal movement mechanism 40, respectively. Let For example, as shown in FIG. 1, the replenishing tank vertical movement mechanism 38 includes a first piston 52 whose upper part is coupled to the bottom plate portion of the resin replenishing tank 22, and a first piston 52 that accommodates the first piston 52 in a vertically displaceable manner. One hydraulic cylinder 54 and a first hydraulic unit 56 are provided. The first hydraulic unit 56 includes a hydraulic pipe 58 for passing through the first hydraulic cylinder 54 and the first oil tank 57, and a first check valve disposed between the first hydraulic cylinder 54 and the first oil tank 57. 60, a first electromagnetic valve 62, and a first hydraulic pump 64. The first hydraulic pump 64 can be driven by a first electric motor (not shown). The driving of the first electromagnetic valve 62 and the first electric motor can be controlled by the control device 28.

  The control device 28 has a replenishment tank vertical movement mechanism control means and a replenishment tank horizontal movement mechanism control means. The replenishing tank vertical movement mechanism control means outputs a drive control signal to the first electromagnetic valve 62 and the first electric motor, and displaces the resin replenishing tank 22 connected to the first piston 52 in the vertical direction. For example, when raising the resin replenishment tank 22, pressure oil is supplied from the first hydraulic pump 64 to the hydraulic space of the first hydraulic cylinder 54 via the first check valve 60 by starting the first electric motor, The first rod composed of the first piston 52 and the first hydraulic cylinder 54 is extended. Excess pressure oil is recirculated to the first oil tank 57 via a relief valve (not shown). Thereby, the resin replenishment tank 22 rises. On the other hand, when lowering the resin replenishing tank 22, the first electromagnetic valve 62 is opened, the first hydraulic pump 64 is rotated in the reverse direction by the first electric motor, and the pressure in the first hydraulic cylinder 54 is increased. The oil is returned to the first oil tank 57. Thereby, since the 1st rod shrinks, resin replenishing tank 22 descends.

  As shown in FIG. 2, the replenishing tank horizontal movement mechanism 40 is, for example, a second piston having one end coupled to one side (left side in FIG. 2) of the first hydraulic cylinder 54 constituting the replenishing tank vertical movement mechanism 38. 66, a second hydraulic cylinder 68 that accommodates the second piston 66 so as to be movable in the horizontal direction, and a second hydraulic unit 70. The second hydraulic unit 70 includes a hydraulic pipe 74 for passing through the second hydraulic cylinder 68 and the second oil tank 72, and a second check valve disposed between the second hydraulic cylinder 68 and the second oil tank 72. 76, a second electromagnetic valve 78, and a second hydraulic pump 80. The second hydraulic pump 80 can be driven by a second electric motor (not shown). The driving of the second electromagnetic valve 78 and the second electric motor can be controlled by the control device 28. The first hydraulic cylinder 54 is guided to move in the horizontal direction by a guide portion (not shown). An elastic force imparting means 82 such as a spring is provided on the other side of the first hydraulic cylinder 54 opposite to the second piston 66 sandwiching the first hydraulic cylinder 54, and the first hydraulic cylinder 54 is provided by the elastic force imparting means 82. Is given elasticity in the direction toward the second hydraulic cylinder 68.

  The replenishing tank horizontal movement mechanism control means outputs a drive control signal to the second electromagnetic valve 78 and the second electric motor, the first hydraulic cylinder 54 connected to the second piston 66, the first piston 52, and the resin replenishment. The tank 22 is displaced in the horizontal direction. For example, when the resin replenishing tank 22 is displaced in the direction away from the second hydraulic cylinder (right side in FIG. 2), which is one side of the horizontal direction perpendicular to the longitudinal axis of the liner 12, When the motor is started, pressure oil is supplied from the second hydraulic pump 80 to the hydraulic space of the second hydraulic cylinder 68 via the second check valve 76, and the second rod composed of the second piston 66 and the second hydraulic cylinder 68 is supplied to the second rod. Stretch. Excess pressure oil is recirculated to the second oil tank 72 via a relief valve (not shown). As a result, the resin replenishing tank 22 is displaced in a direction away from the second hydraulic cylinder 68. On the other hand, when the resin replenishing tank 22 is displaced in the direction approaching the second hydraulic cylinder 68 (left side in FIG. 2), which is the other side in the horizontal direction perpendicular to the longitudinal axis of the liner 12. Opens the second electromagnetic valve 78, rotates the second hydraulic pump 80 in the reverse direction by the second electric motor, and causes the pressure oil in the second hydraulic cylinder 68 to return to the second oil tank 72. As a result, the second rod is contracted, so that the resin replenishing tank 22 is displaced in a direction approaching the second hydraulic cylinder 68. Note that the first oil tank 57 and the second oil tank 72 may be a common oil tank.

  Further, the replenishing tank vertical movement mechanism control means raises the resin replenishing tank 22 to a predetermined height or more when the number of wound layers of the resin-impregnated fibers 32 wound around the liner 12 is a predetermined value or less, for example, 5 layers or less. As shown in FIG. 1 and FIG. 2, it has a function of controlling the driving of the replenishing tank vertical movement mechanism 38 so that the lower part of the resin-impregnated fiber 32 wound around the liner 12 is immersed in the epoxy resin 48 in the resin replenishing tank 22. Further, the replenishing tank up-and-down moving mechanism control means lowers the resin replenishing tank 22 below a predetermined height when the number of wound layers of the resin-impregnated fibers 32 wound around the liner 12 exceeds a predetermined value, for example, 5 layers. It also has a function of controlling the driving of the replenishing tank vertical movement mechanism 38 so that the lowermost end of the wound resin-impregnated fiber 32 and the epoxy resin 48 in the resin replenishing tank 22 do not contact each other. That is, the replenishing tank up-and-down moving mechanism control means is configured such that the amount of the epoxy resin 48 impregnated in the portion near the inner diameter of the wound layer of the plurality of resin-impregnated fibers 32 wound around the liner 12 is at least a part of the other part of the wound layer. The driving of the replenishing tank up-and-down moving mechanism 38 is controlled so as to be larger than the amount of the epoxy resin 48 impregnated in the tank.

  Further, the replenishing tank horizontal movement mechanism control means includes the detection value from the gap detection sensor 50, the number of layers of the resin-impregnated fiber 32 wound around the liner 12, and the horizontal and vertical positions of the resin replenishing tank 22. Representing signals are respectively input. For this reason, the position of the resin replenishing tank 22 in the horizontal direction and the vertical direction can be detected by a position detection sensor (not shown). The replenisher horizontal movement mechanism control means then adjusts the upper end of the side wall portion 46 when necessary so that the outer diameter of the resin-impregnated fiber 32 wound around the liner 12 containing resin has a desired size corresponding to the number of wound layers. The edge portion is pressed against the resin-impregnated fiber 32 wound around the liner 12 and has a function of controlling the drive of the replenishing tank horizontal movement mechanism 40 so as to scrape off the excess epoxy resin 48. The replenishing tank horizontal movement mechanism control means receives the detection value from the gap detection sensor 50 so that the upper end edge of the side wall 46 is always pressed against the resin-impregnated fiber 32 wound around the liner 12. The driving of the horizontal movement mechanism 40 can also be controlled. In this case, the replenishing tank horizontal movement mechanism control means stops the horizontal movement of the resin replenishing tank 22 with the upper edge of the side wall 46 being pressed against the resin-impregnated fiber 32 wound around the liner 12. Let's make it.

  A method of manufacturing a high-pressure gas tank using such a tank manufacturing apparatus supplies resin-impregnated fibers 32 from the resin bath 34 by impregnating the carbon fibers 30 delivered from the creel stand with the epoxy resin by the resin bath 34, and impregnates the resin. A high pressure gas tank is formed by wrapping the fibers 32 around the liner 12 which forms the shape of the product. Further, the upper and lower positions of the resin replenishing tank 22 disposed below the liner 12 and containing the epoxy resin 48 are changed according to the number of wound layers of the resin-impregnated fibers 32 wound around the liner 12, that is, the liner 12 In the step of winding the resin-impregnated fiber 32, the upper and lower positions of the resin replenishing tank 22 are set to a predetermined value only when the number of wound layers of the plurality of resin-impregnated fibers 32 wound around the liner 12 is a predetermined value or less, for example, 5 layers or less. The amount of the resin impregnated in the portion closer to the inner diameter of the wound layer of the plurality of resin-impregnated fibers 32 wound around the liner 12 is a part of the other part of the wound layer. More than the amount of resin impregnated in several layers of 6 layers or more.

  Further, the resin-impregnated fiber 32 wound around the liner 12 is moved by moving the resin replenishment tank 22 in the horizontal direction so that the upper edge of the side wall portion 46 of the resin replenishment tank 22 moves far and away from the outer peripheral surface of the liner 12. It is possible to scrape off excess resin adhering to the surface.

  According to the fiber reinforced resin container manufacturing method and the fiber reinforced resin container manufacturing apparatus of this embodiment, the amount of the fiber reinforced resin is large without excessively increasing the size of the high pressure gas tank. A sufficient resin layer can be impregnated in the layer near the inner diameter required. That is, the upper and lower positions of the resin replenishing tank 22 placed below the liner 12 and containing the epoxy resin 48 are changed according to the number of wound layers of the resin-impregnated fibers 32 wound around the liner 12. Since the amount of resin impregnated in the portion closer to the inner diameter of the wound layer of the plurality of resin-impregnated fibers 32 wound is larger than the amount of resin impregnated in other portions of the wound layer, Along with the winding of the resin-impregnated fiber 32, the amount of resin on the inner layer side can be sufficiently ensured despite the tendency that the resin oozes from the plurality of fibers from the inner layer side to the outer layer side.

  3 (a) and 3 (b) show the partial cross-section of the molded high-pressure gas tank in the case of the conventional example (a) and the case of the present embodiment (b), respectively, in FIG. 4 (a) above. It is a corresponding figure. 3A and 3B show the level of Vf, which is the fiber volume content in the fiber reinforced resin. For example, in each of FIGS. 3A and 3B, the fiber reinforced resin is constituted by resin impregnated fibers 32 having 30 winding layers. As can be seen from FIGS. 3 (a) and 3 (b), in the case of the conventional example (FIG. 3 (a)), the fiber volume content Vf becomes lower toward the outer diameter side and becomes higher toward the inner diameter side. . That is, in the conventional example, the resin amount tends to decrease at the portion near the inner diameter, and the resin amount tends to increase at the portion closer to the outer diameter. On the other hand, in the case of the present embodiment (FIG. 3B), the fiber volume content Vf can be lowered at the first five layer portions or the like that are the start of winding on the liner 12, that is, the resin You can increase the amount. Furthermore, in this Embodiment, the fiber volume content Vf becomes high in several layer parts exceeding 5 layers from the winding start to the liner 12, and is so low that it goes to an outer diameter side. Thus, in the present embodiment, it is possible to easily ensure a sufficient amount of resin on the inner diameter side of the tank.

  Further, the resin-impregnated fiber 32 passes through, for example, the ikuchi guide portion 24 or the like before being sent from the resin bath 34 to the portion wound around the liner 12, so that the epoxy resin is taken away or dripped down due to squeezing or the like. Even if it becomes a tendency, according to this Embodiment, the epoxy resin 48 can be replenished to the resin impregnation fiber 32 with the resin replenishment tank 22, and it can be easy to ensure the resin amount of the inner layer side enough. Moreover, since it is not necessary to excessively increase the total resin amount, it is possible to prevent the outer diameter of the high-pressure gas tank from becoming excessively large. As a result, without excessively increasing the size of the high-pressure gas tank, it is possible to obtain a high-pressure gas tank in which a sufficient amount of resin is impregnated in the layer near the inner diameter that requires a large amount of the fiber-reinforced resin. High fatigue endurance performance.

  Further, the resin-impregnated fiber 32 wound around the liner 12 is moved by moving the resin replenishment tank 22 in the horizontal direction so that the upper edge of the side wall portion 46 of the resin replenishment tank 22 moves far and away from the outer peripheral surface of the liner 12. The resin-impregnated fiber wound around the liner 12 can be scraped off without providing a mechanism for moving the resin scraping portion separately from the mechanism for moving the resin replenishing tank 22 in the horizontal direction. It is possible to easily adjust the resin adhesion amount of 32.

  In the above embodiment, a case has been described in which a plurality of sheet-like or fiber bundles of carbon fibers 30 delivered from a creel stand are impregnated with resin, and a plurality of resin-impregnated fibers 32 are wound around the liner 12. The invention is not limited to such a method. For example, the resin impregnated fiber can be formed by impregnating a single sheet-like or fiber bundle of carbon fiber fed from a supply bobbin with resin, and the resin impregnated fiber can be wound around the liner 12.

  Further, the replenishing tank vertical movement mechanism 38 and the replenishing tank horizontal movement mechanism 40 are not limited to the configurations described in the present embodiment, and various structures can be employed. For example, the replenishing tank vertical movement mechanism 38 and the replenishing tank horizontal movement mechanism 40 may be configured to include a pneumatic cylinder or an electric actuator, and may be configured to move in the vertical direction or the horizontal direction by pneumatic pressure or electric power. Moreover, the resin scraping part can also be comprised by the upper end part of another side wall part 47 (FIG. 2) facing the side wall part 46 which attached the gap detection sensor 50, for example. Further, in the above embodiment, a GFRP layer is provided on the outer side of the carbon fiber reinforced resin as in the case of the carbon fiber reinforced resin tank manufactured by the conventionally considered method shown in FIG. A glass layer can also be provided.

It is a partial block diagram of the tank manufacturing apparatus which manufactures a high pressure gas tank with the manufacturing method of embodiment of this invention. FIG. 2 is a view showing a part of the liner and resin replenishing tank and the ikuchi guide portion of FIG. 1 as viewed from the left side to the right side in FIG. It is a figure corresponding to Drawing 4 (a) which shows a partial section of a high-pressure gas tank after fabrication in a case (a) of a conventional example, and a case (b) of this embodiment, respectively. A cross section of one example of a carbon fiber reinforced resin tank made by a conventionally considered method, (a) which is a partial enlarged schematic cross section of this tank, and a schematic cross section obtained by further enlarging the outer layer part of (a) It is a figure which shows (b) which is (a), and (c) which is the schematic cross section which expanded the inner-layer part of (a) further.

Explanation of symbols

  10 tank, 12 liner, 14 fiber reinforced resin, 16, 18 base, 20 glass layer, 22 resin replenishing tank, 24 ikuchi guide section, 26 molding section, 28 control device, 30 carbon fiber, 32 resin impregnated fiber, 34 resin bath, 36 Liner rotating device, 38 Replenisher tank vertical movement mechanism, 40 Replenisher tank horizontal movement mechanism, 42 Resin tank, 44 Resin scraping roller, 46, 47 Side wall part, 48 Epoxy resin, 50 Gap detection sensor, 52 First piston, 54 First hydraulic cylinder, 56 First hydraulic unit, 57 First oil tank, 58 Hydraulic piping, 60 First check valve, 62 First electromagnetic valve, 64 First hydraulic pump, 66 Second piston, 68 Second hydraulic cylinder, 70 second hydraulic unit, 72 second oil tank, 74 hydraulic piping, 76 second check valve, 8 the second electromagnetic valve, 80 second hydraulic pump, 82 elasticity applying means.

Claims (6)

A method for producing a fiber reinforced resin container, in which a fiber reinforced resin container is formed by wrapping resin impregnated fiber obtained by impregnating a fiber sent from a fiber supply section with a resin bath with a liner that forms the shape of the product Because
Winding multiple resin-impregnated fibers wound around the liner by changing the upper and lower positions of the resin replenishing tank containing the resin according to the number of wound layers of resin-impregnated fibers wound around the liner. A method for producing a fiber-reinforced resin container, characterized in that the amount of resin impregnated in a part of the layer is larger than the amount of resin impregnated in at least part of the other part of the wound layer . In the manufacturing method of the fiber reinforced resin container according to claim 1,
In the step of winding the resin-impregnated fiber around the liner, the upper and lower positions of the resin replenishing tank are set to a predetermined height or more only when the number of wound layers of the plurality of resin-impregnated fibers wound around the liner is equal to or less than a predetermined value. The amount of the resin impregnated in the portion near the inner diameter of the wound layer of the plurality of resin-impregnated fibers wound around the liner is larger than the amount of the resin impregnated in at least a part of the other portion of the wound layer. A method for producing a fiber-reinforced resin container. In the manufacturing method of the container made from fiber reinforced resin of Claim 1 or Claim 2,
By moving the resin replenishment tank in the horizontal direction so that the resin scraping part provided at the top of the resin replenishment tank moves far and away with respect to the outer peripheral surface of the liner, excess resin adhering to the resin-impregnated fibers wound around the liner is obtained. A method for producing a fiber-reinforced resin container, wherein the resin can be scraped off. A fiber-reinforced resin container manufacturing apparatus for manufacturing a fiber-reinforced resin container by the method for manufacturing a fiber-reinforced resin container according to claim 1,
A fiber supply unit;
A resin bath for impregnating resin into fibers fed from the fiber supply unit;
A winding section for winding the resin-impregnated fiber after passing through the resin bath around a liner that forms the shape of the container;
A resin replenishing tank provided on the lower side of the part where the liner of the winding part is disposed;
A replenishing tank up-and-down moving mechanism for moving the resin replenishing tank containing the resin in the vertical direction;
Top and bottom of the replenishment tank so that the amount of resin impregnated in a part of the wound layer of a plurality of resin-impregnated fibers wound around the liner is larger than the amount of resin impregnated in at least part of the other part of the wound layer A fiber reinforced resin container manufacturing apparatus, comprising: a replenishing tank up / down moving mechanism control means for controlling driving of the moving mechanism. In the fiber reinforced resin container manufacturing apparatus according to claim 4,
The replenishing tank vertical movement mechanism control means lowers the resin replenishing tank when the number of wound layers of the resin-impregnated fiber wound around the liner exceeds a predetermined value, and the resin-impregnated fiber wound around the liner and the resin in the resin replenishing tank An apparatus for manufacturing a fiber-reinforced resin container, wherein the drive of the replenishing tank up-and-down moving mechanism is controlled so as not to contact. In the fiber reinforced resin container manufacturing apparatus according to claim 4 or 5,
A resin scraper provided at the top of the resin replenishing tank;
A fiber reinforced resin container manufacturing apparatus comprising: a replenishing tank horizontal movement mechanism for moving the resin replenishing tank in a horizontal direction.

Images