JP2008290308A - Method and apparatus for manufacturing fiber reinforced resin made container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for manufacturing a fiber reinforced resin made container manufacturing the fiber reinforced resin made container, wherein the fatigue durability performance of the fiber reinforced resin made container is improved without excessively increasing the dimension of the fiber reinforced resin made container. <P>SOLUTION: The apparatus for manufacturing the fiber reinforced resin made container includes a resin bath 28 for impregnating carbon fiber 24 with an epoxy resin to supply as the resin impregnated fiber 26 and a liner rotation apparatus for rotating a liner 12 to wind the resin impregnated fiber 26. A temperature controller 30 is provided between the resin bath 28 and the liner 12. A part constituting the inner layer of the periphery of the liner 12 is cooled by being passed through the cooled temperature controller 30. A part constituting the outer layer of the periphery of the liner 12 is heated by being passed through the heated temperature controller 30. <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 discloses that a composite composition of a matrix resin composed of a thermoplastic resin and a liquid crystal resin is extruded with an extrusion die, and then the extruded strand is stretched while being cooled to room temperature in a cooling bath, Thereafter, a method for forming a liquid crystal resin composite is described in which filament winding is performed.

  Further, in Patent Document 2, in order to keep the amount of impregnating resin with respect to the fiber base material constant without depending on the moving speed of the fiber base material, the lower part is immersed in the resin stored in the resin impregnation apparatus. Rotate the resin impregnated roll, pick up the resin on the surface of the resin impregnated roll, adjust the film thickness of the picked up resin by scraping off part of the resin with the film thickness adjusting plate, and then impregnate the resin on the fiber base material A resin impregnation apparatus is described.

JP-A-5-193010 JP 2000-108211 A

  Generally, 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 the filament winding method, the carbon fiber is impregnated with a thermosetting resin. A step of winding the resin-impregnated fiber around several to several dozen 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 resin-impregnated fibers increases, the resin oozes from the plurality of fibers constituting the inner layer of the fiber reinforced resin to the outer layer side, and the fiber occupies the entire volume as it goes from the radially outer side to the inner side. Vf (%), which is the fiber volume content, is a tendency 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. 9 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. A tank 10 shown in FIG. 9 has a fiber reinforced resin 14 provided around a 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, a glass layer 20 is provided on the outside of the fiber reinforced resin 14 by winding a resin impregnated fiber to be the fiber reinforced resin 14 around the outer side of the fiber reinforced resin 14 and winding the glass fiber impregnated with the resin. .

  In FIGS. 9B and 9C, carbon fibers are represented by white circles, and resin is represented by black portions. As shown in FIG. 9 (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. 9 (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, Patent Document 1 describes a method for molding a liquid crystal resin composite as described above, but neither a method for molding a fiber reinforced resin container nor a fiber reinforced resin container manufacturing apparatus is described. . Further, Patent Document 1 does not describe means for increasing the fatigue durability performance of the fiber reinforced resin container without excessively increasing the size of the fiber reinforced resin container.

  Further, Patent Document 2 describes a resin impregnation apparatus as described above, and it is described that the resin impregnation apparatus is used in a manufacturing process of a fiber reinforced plastic container. No means for increasing the fatigue endurance performance of the fiber reinforced resin container without excessively increasing the size of is described. In the case of the techniques described in Patent Document 1 and Patent Document 2, the fatigue durability performance of the fiber reinforced resin container cannot be increased without excessively increasing the size of the fiber reinforced resin container. There is sex.

  An object of the present invention is to increase the fatigue endurance performance of a fiber reinforced resin container without excessively increasing the size of the fiber reinforced resin container in the fiber reinforced resin container manufacturing method and the fiber reinforced resin container manufacturing apparatus. That is.

  Among the methods for producing a fiber-reinforced resin container according to the present invention, the method for producing a fiber-reinforced resin container according to the first invention is obtained by impregnating a resin sent from a fiber supply unit with a resin bath. A method of manufacturing a fiber reinforced resin container by forming a fiber reinforced resin container by wrapping resin impregnated fiber around a liner that forms the shape of a product, before the resin impregnated fiber or resin bath before being wound around the liner It is a manufacturing method of the fiber reinforced resin container characterized by cooling a fiber.

  Further, among the fiber reinforced resin container manufacturing apparatus according to the present invention, the fiber reinforced resin container manufacturing apparatus according to the second invention is a fiber reinforced resin produced by the method for manufacturing a fiber reinforced resin container according to the first invention. A fiber reinforced resin container manufacturing apparatus for manufacturing a container, comprising a fiber supply unit, a resin bath for impregnating resin into fibers sent from the fiber supply unit, and a resin-impregnated fiber after passing through the resin bath to form a container shape An apparatus for producing a fiber-reinforced resin container, comprising: a winding portion wound around a liner; and a cooling means for lowering the temperature of the resin-impregnated fiber before being wound around the liner or the fiber before passing through the resin bath.

  Further, among the fiber bundle resin impregnating apparatus according to the present invention, the fiber reinforced resin container manufacturing apparatus according to the third invention is the fiber reinforced resin container manufacturing apparatus according to the second invention, wherein the cooling means is resin impregnated. A fiber reinforced resin container manufacturing apparatus, which is a temperature adjusting device or a guide roller capable of lowering the temperature of a resin-impregnated fiber or fiber by passing the fiber or fiber.

  Moreover, the manufacturing method of the fiber reinforced resin container which concerns on 4th invention among the manufacturing methods of the fiber reinforced resin container which concerns on this invention makes the fiber sent out from the fiber supply part impregnate resin with a resin bath. A method for manufacturing a fiber reinforced resin container in which a fiber reinforced resin container is formed by wrapping the obtained resin impregnated fiber around a liner that forms the shape of a product, by changing the temperature of the resin accommodated in the resin bath In the resin impregnated fibers wound around the liner, the resin adhesion amount in the resin bath to the fibers constituting the inner diameter side portion is made larger than the resin adhesion amount in the resin bath to the fibers constituting the outer diameter side portion. It is a manufacturing method of the container made from fiber reinforced resin.

  Of the fiber reinforced resin container manufacturing apparatus according to the present invention, the fiber reinforced resin container manufacturing apparatus according to the fifth invention is a fiber reinforced resin produced by the method for manufacturing a fiber reinforced resin container according to the fourth invention. A fiber reinforced resin container manufacturing apparatus for manufacturing a container, comprising a fiber supply unit, a resin bath for impregnating resin into fibers sent from the fiber supply unit, and a resin-impregnated fiber after passing through the resin bath to form a container shape A winding unit wound around the liner, a temperature adjusting unit capable of adjusting the temperature of the resin accommodated in the resin bath, and a temperature adjusting unit control unit for controlling the temperature of the temperature adjusting unit, the temperature adjusting unit control unit, Among the resin-impregnated fibers wound around the liner, the temperature of the temperature adjusting unit when the fibers constituting the inner diameter side portion pass through the resin bath, and among the resin-impregnated fibers, the fibers constituting the outer diameter side portion are A fiber-reinforced resin container manufacturing apparatus characterized by be lower than the temperature of the temperature adjustment portion when passing through the Jinbasu.

  According to the fiber reinforced resin container manufacturing method and the fiber reinforced resin container manufacturing apparatus according to the present invention, the fatigue durability of the fiber reinforced resin container can be increased without excessively increasing the size of the fiber reinforced resin container. . That is, according to the configuration in which the resin-impregnated fiber before being wound around the liner or the fiber before passing through the resin bath is cooled, the inner layer of the fiber-reinforced resin among the resin-impregnated fibers wound around the liner to produce a fiber-reinforced resin container is used. While increasing the viscosity of the constituent parts by cooling, among the resin-impregnated fibers wound around the liner, by decreasing the viscosity of the part constituting the outer layer of the fiber reinforced resin by non-cooling, the amount of resin impregnation in the inner layer part is increased. On the other hand, the amount of resin impregnation in the outer layer portion can be reduced. For this reason, it is easy to ensure a sufficient amount of resin on the inner layer side even though the resin tends to ooze out 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. . Further, it is not necessary to excessively increase the outer diameter of the fiber reinforced resin container. As a result, the fatigue durability of the fiber reinforced resin container can be increased without excessively increasing the size of the fiber reinforced resin container.

  Further, by changing the temperature of the resin accommodated in the resin bath, the resin adhering amount in the resin bath with respect to the fibers constituting the inner diameter side portion of the resin impregnated fibers wound around the liner is the fiber constituting the outer diameter side portion. Even if the resin adhesion amount in the resin bath is increased, the resin impregnation tends 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. It is easy to secure a sufficient amount of resin on the inner layer side of the fiber reinforced resin container. Further, it is not necessary to excessively increase the outer diameter of the fiber reinforced resin container. As a result, the fatigue durability of the fiber reinforced resin container can be increased without excessively increasing the size of the fiber reinforced resin container.

[First Embodiment]
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 the fiber reinforced resin container manufacturing method according to the first embodiment of the present invention. The tank manufacturing apparatus includes a molding unit 22 and a control device 23 that is a control unit. In FIG. 1, although not a component of the tank manufacturing apparatus, a liner 12 that forms the shape of the molded product is also illustrated.

  The molding unit 22 sets a carbon fiber 24 as a raw material, that is, a supply bobbin (not shown) that is a fiber supply unit that performs winding and feeding, and a carbon fiber 24 fed from the supply bobbin is impregnated with a liquid resin. A resin bath 28 to be supplied as the resin-impregnated fiber 26, and a liner (not shown) that is a winding unit that winds the resin-impregnated fiber 26 after passing through the resin bath 28 around the liner 12 that forms the shape of the high-pressure gas tank that is a fiber-reinforced resin container. A rotating device and a temperature adjusting device 30 as cooling means are provided.

  The carbon fiber 24 is wound around the liner 12 from a supply bobbin via some rollers and the like, and the liner 12 is rotationally driven around the longitudinal axis of the liner 12 by a liner rotating device. Here, the liner rotating device has a function of a fiber winding unit. Accordingly, the carbon fiber 24 is tensioned by the rotational drive of the liner 12, and the resin-impregnated fiber 26 is tightly wound around the liner 12 under the tension. The liner rotating device and the liner 12 constitute a fiber winding forming unit. In order to apply tension to the carbon fiber 24, tension can be applied on the supply bobbin side.

  The carbon fiber 24 which is a raw material is made by firing organic polymer fibers at a high temperature of about 3000 ° C., and the fired materials are collected in a state where, for example, about 24000 pieces are straightened and lightly bonded with a binder resin. A flat fiber bundle having a length of about 200 μm and a width of about 3 mm to 10 mm can be used.

  The resin bath 28 has a function of impregnating such a carbon fiber 24 with a liquid resin, and a resin tank 32 filled with a liquid thermosetting epoxy resin (hereinafter simply referred to as “epoxy resin”). , A resin scraping roller 34 partially immersed in the resin tank 32, and a front roller 36 and a rear roller 38 disposed before and after the resin scraping roller 34.

  The carbon fibers 24 are stretched along the lower outer periphery of the front roller 36, the upper outer periphery of the resin scraping roller 34, and the lower outer periphery of the rear roller 38, and are drawn out from the resin bath 28 to the rear roller 38 side. The resin scraping roller 34 rotates to attach a liquid epoxy resin from the resin tank 32 to the outer periphery, and when the carbon fiber 24 passes through the upper side, the resin adheres to and impregnates the carbon fiber 24. .

  The resin tank 32 includes a heater (not shown), and the epoxy resin is heated in a range of 40 ° C. to 50 ° C., for example, 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 32 can be measured by a resin temperature sensor (not shown).

  The resin-impregnated fiber 26 drawn out from the resin bath 28 and after passing through the resin bath 28 and before being wound around the liner 12 passes through a fiber passage portion (not shown) such as a hole provided in the temperature control device 30 to pass through the resin-impregnated fiber 26. The temperature can be lowered or raised. The temperature control device 30 is a cooling device that also has a function of a heating device, and is disposed between the resin bath 28 and the liner 12. For example, the temperature control device 30 can be configured to circulate a fluid such as water or a fluid such as a gas inside and reduce the temperature or increase the temperature of the fluid by a cooling unit or a heating unit. Further, the temperature adjusting device 30 is capable of adjusting the temperature inside the fiber passage portion when a control signal is input from the control device 23. The control device 23 has a temperature control device control means, and for example, a signal indicating the rotation speed of the liner 12 can be input to the temperature control device control means. The temperature control device control means obtains the number of winding layers of the resin-impregnated fiber 26 wound around the liner 12, that is, the number of layers, from the number of rotations of the liner 12, and if the number of layers is equal to or less than a predetermined value, When the temperature is lowered and the number of laminations exceeds a predetermined value, the temperature in the fiber passage portion of the temperature control device 30 is increased more than when the number of laminations is equal to or less than the predetermined value.

  Further, the temperature in the fiber passage portion of the temperature adjusting device 30 can be gradually increased as the number of the resin-impregnated fibers 26 wound around the liner 12 increases by the temperature adjusting device control means. FIG. 2 shows 1 of the relationship between the temperature of the temperature control device 30 and the number of layers of the resin-impregnated fibers 26 when the control of gradually increasing the temperature of the temperature control device 30 according to the increase in the number of layers is performed. It is a figure which shows an example. In this embodiment, the number of the resin-impregnated fibers 26 (FIG. 1) is increased, that is, the temperature control device 30 (FIG. 1) is gradually increased from the inner layer side to the outer layer side of the high-pressure gas tank. It can also be controlled to increase the temperature.

  Returning to FIG. 1, the resin-impregnated fiber 26 that has passed through the temperature control device 30 is guided so as to be easily wound around the liner 12 by a guide portion (not shown). The guide unit includes a moving mechanism that moves, for example, along the outer shape of the liner 12. The moving mechanism moves the guide unit in the longitudinal direction of the liner 12 and the width direction of the liner 12 as the liner 12 rotates. Move in the front and back direction.

  The liner 12 is a core material that shapes the shape of the molded product. For example, when a high-pressure gas tank is molded, 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 rotatably supported around the longitudinal axis by the liner rotating device, and is rotated around the longitudinal axis by a rotational drive mechanism. The resin-impregnated fiber 26 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. When the resin-impregnated fiber 26 impregnated with the epoxy resin is wound around the liner 12 with a predetermined number of turns and the shape of the product is formed, a curing process is performed thereafter, the epoxy resin is cured, and the container is made of fiber reinforced resin. A high pressure gas tank is formed.

  A method of manufacturing a high-pressure gas tank using such a tank manufacturing apparatus supplies resin impregnated fibers 26 from the resin bath 28 by impregnating the carbon fibers 24 delivered from the supply bobbin with the resin bath 28, thereby impregnating the resin. A high pressure gas tank is formed by wrapping the fibers 26 around the liner 12 that forms the shape of the product. Further, among the resin-impregnated fibers 26 wound around the liner 12, the portion constituting the inner layer of the fiber reinforced resin is cooled by the temperature adjusting device 30, and among the resin-impregnated fibers 26 wound around the liner 12, the outer layer of the fiber reinforced resin is constituted. The part is not cooled by the temperature control device 30. For example, the temperature of the resin-impregnated fiber 26 constituting the inner layer is lowered by passing the resin-impregnated fiber 26 constituting the inner layer through the temperature-adjusted device 30 with the temperature lowered, and the resin-impregnated fiber 26 constituting the outer layer is passed through the temperature-regulated device 30 with the increased temperature. To increase the temperature. Thereby, the viscosity of the resin-impregnated fiber 26 after passing through the temperature control device 30 is made higher than the viscosity of the resin-impregnated fiber 26 before passing through the temperature control device 30.

  According to such a fiber reinforced resin container manufacturing method and fiber reinforced resin container manufacturing apparatus of the present embodiment, the resin-impregnated fiber 26 after passing through the resin bath 28 is cooled by the temperature adjusting device 30. The viscosity of the resin-impregnated fiber 26 after passing through the temperature control device 30 is made higher than the viscosity of the resin-impregnated fiber 26 before passing through the temperature control device 30. For this reason, the fatigue endurance performance of the high-pressure gas tank can be enhanced without excessively increasing the size of the high-pressure gas tank. That is, among the resin-impregnated fibers 26 wound around the liner 12 to produce a high-pressure gas tank, the viscosity of the portion constituting the inner layer of the fiber-reinforced resin is increased by cooling, and among the resin-impregnated fibers 26 wound around the liner 12, the fiber-reinforced fibers The viscosity of the part constituting the outer layer of the resin is lowered by non-cooling. Thereby, while increasing the resin impregnation amount of the inner layer portion, the resin impregnation amount of the outer layer portion can be decreased. Therefore, it is easy to ensure a sufficient amount of resin on the inner layer side even though the resin tends to ooze out from between the plurality of fibers from the inner layer side to the outer layer side as the resin-impregnated fiber 26 is wound around the liner 12. it can. Further, it is not necessary to excessively increase the outer diameter of the high pressure gas tank. As a result, the fatigue durability of the high pressure gas tank can be enhanced without excessively increasing the size of the high pressure gas tank.

  In addition, in order to be able to withstand the tank at a high pressure such as 70 MPa conventionally, it has been considered to increase the thickness of the tank, but when there is a restriction such as installation in a narrow space of an automobile, It is desirable to reduce the plate thickness. According to the present embodiment, the resin-impregnated fibers 26 constituting the inner layer of the high-pressure gas tank are cooled, and the resin impregnation amount is increased and the resin constituting the outer layer is reduced by reducing the low Vf, that is, the fiber volume content. The impregnated fiber 26 is heated, that is, the temperature is increased, and the high Vf, that is, the fiber volume content is positively increased, so that the fatigue thickness of the high-pressure gas tank is sufficiently secured and the plate thickness of the high-pressure gas tank is further reduced. Thus, the outer diameter can be made smaller.

[Second Embodiment]
FIG. 3 is a partial configuration diagram of a tank manufacturing apparatus, which is a fiber-reinforced resin container manufacturing apparatus according to a second embodiment of the present invention. In the present embodiment, the temperature adjustment device 30 is omitted in the first embodiment described above, and the temperature control capable of cooling and heating is used instead of the rear roller 38 (see FIG. 1) provided in the resin bath 28. A guide roller 40 is provided. The temperature control guide roller 40 can rotate around the central axis, and the temperature of the resin impregnated fiber 26 can be decreased or increased by passing the resin impregnated fiber 26 through the temperature control guide roller 40. For example, the temperature control guide roller 40 can be configured to circulate a fluid such as water or a fluid such as gas in the inside and lower the temperature or increase the temperature of the fluid by a cooling unit or a heating unit. The temperature control guide roller 40 may be configured not to rotate. In this case, the resin-impregnated fiber 26 passes through the peripheral surface of the temperature control guide roller 40 adjusted in temperature.

  Further, in the manufacturing method of the fiber-reinforced resin container according to the present embodiment, the carbon fiber 24 delivered from a supply bobbin (not shown) is impregnated with an epoxy resin by the resin bath 28 to obtain the resin-impregnated fiber 26 and the liner 12. When the portion constituting the inner layer of the fiber reinforced resin passes through the temperature control guide roller 40 among the resin-impregnated fibers 26 wound around, the temperature control guide roller 40 is cooled by lowering the temperature. Moreover, when the part which comprises the outer layer of fiber reinforced resin among the resin impregnation fiber 26 wound around the liner 12 passes the temperature control guide roller 40, it heats by raising the temperature control guide roller 40. As a result, the viscosity of the resin-impregnated fiber 26 after passing through the temperature control guide roller 40 is made higher than the viscosity of the resin-impregnated fiber 26 before passing through the temperature control guide roller 40. In the case of the present embodiment, the temperature adjustment guide roller 40 serves as a cooling means.

  The temperature of the temperature control guide roller 40 is controlled by temperature control guide roller temperature control means included in the control device 23. For example, a signal indicating the rotation speed of the liner 12 can be input to the temperature control guide roller temperature control means. The temperature control guide roller temperature control means obtains the number of wound layers of the resin-impregnated fiber 26 wound around the liner 12, that is, the number of layers, from the number of rotations of the liner 12, and the temperature of the temperature control guide roller 40 when the number of layers is equal to or less than a predetermined value. When the number of layers exceeds a predetermined value, the temperature control guide roller 40 has a function of increasing the temperature of the temperature control guide roller 40 as compared with the case where the number of layers is not more than a predetermined value.

  Further, in the case shown in FIG. 2, the resin-impregnated fiber wound around the liner 12 by the temperature control guide roller temperature control means, similarly to the case where the temperature of the temperature control device is changed to the temperature of the temperature control guide roller 40. As the number of layers 26 increases, the temperature of the temperature control guide roller 40 can be gradually increased.

  In the case of this embodiment as well, the viscosity of the portion constituting the inner layer of the fiber reinforced resin among the resin-impregnated fibers 26 wound around the liner 12 in order to produce a high-pressure gas tank is increased by cooling and wound around the liner 12. Of the resin-impregnated fibers 26, by reducing the viscosity of the portion constituting the outer layer of the fiber reinforced resin by non-cooling, the amount of resin impregnation in the inner layer portion can be increased while the amount of resin impregnation in the outer layer portion can be decreased. . For this reason, the fatigue endurance performance of the high-pressure gas tank can be enhanced without excessively increasing the size of the high-pressure gas tank. Since other configurations and operations are the same as those in the first embodiment, the same parts are denoted by the same reference numerals and redundant description is omitted.

[Third Embodiment]
FIG. 4 is a partial configuration diagram of a tank manufacturing apparatus that is a fiber-reinforced resin container manufacturing apparatus according to a third embodiment of the present invention. In the present embodiment, in the first embodiment shown in FIGS. 1 to 2, the temperature adjusting device 30 is disposed between the supply bobbin 42 around which the carbon fiber 24 is wound and the resin bath 28. By passing the carbon fiber 24 through the temperature adjusting device 30, the temperature of the carbon fiber 24 before passing through the resin bath 28 can be lowered or increased.

  Further, in the manufacturing method of the fiber reinforced resin container according to the present embodiment, the portion of the carbon fiber 24 sent out from the supply bobbin 42 that forms the inner layer of the fiber reinforced resin is cooled by the temperature control device 30, and fiber reinforced The portion constituting the outer layer of the resin is not cooled by the temperature control device 30. For example, the temperature of the carbon fiber 24 constituting the inner layer is lowered by passing it through the temperature adjusting device 30 with the temperature lowered, and the carbon fiber 24 constituting the outer layer is passed through the temperature adjusting device 30 with the raised temperature. Increase temperature. Thereby, the viscosity of the resin-impregnated fiber 26 after passing through the resin bath 28 is made higher than the viscosity of the resin-impregnated fiber 26 when it is assumed that the resin is not cooled by the temperature adjusting device 30.

  In the present embodiment, the temperature of the carbon fiber 24 before passing through the resin bus 28 can be adjusted, and the viscosity of the epoxy resin adhered can be adjusted by the temperature of the carbon fiber 24. The structure for adjusting the temperature can be omitted. Since other configurations and operations are the same as those of the first embodiment shown in FIGS. 1 to 2 described above, the same reference numerals are given to the same parts, and redundant description is omitted.

[Fourth Embodiment]
5 to 8 show a fourth embodiment of the present invention. FIG. 5 is a schematic cross-sectional view showing the resin bus 28 portion in the tank manufacturing apparatus which is the fiber-reinforced resin container manufacturing apparatus of the present embodiment. FIG. 6 is an enlarged view of FIG. 5 including the temperature adjustment structure of the resin tank 32. In the present embodiment, in the first embodiment shown in FIGS. 1 and 2, the temperature adjusting device 30 (see FIG. 1) is omitted and a part of the resin bath 28 enters the resin tank 32. The temperature of the heater 44 thus made can be controlled by the control device 23 which is a control unit.

  The heater 44 is a temperature adjustment unit provided in the resin bath 28, and can adjust the temperature of the epoxy resin 46 accommodated in the resin tank 32. Further, the control device 23 has a heater control means for controlling the temperature of the heater 44, and for example, a signal indicating the rotation speed of the liner 12 (see FIG. 1) can be input to the heater control means. The heater control means obtains the number of wound layers of the resin-impregnated fibers 26 wound around the liner 12, that is, the number of layers, from the number of rotations of the liner 12, and gradually increases the temperature of the heater 44 as the number of layers increases. Like that. As the temperature of the heater 44 increases, the temperature of the epoxy resin 46 in the resin tank 32 increases, so that the viscosity of the epoxy resin 46 in the resin tank 32 decreases.

  FIG. 7 shows an example of the relationship between the temperature and the viscosity of the epoxy resin 46 in the resin tank 32. As shown in FIG. 7, the resin viscosity in the resin tank 32 increases as the resin temperature decreases, and decreases as the resin temperature increases. The present embodiment utilizes such a relationship, and the heater control means linearizes the resin temperature in the resin tank 32 as the number of the resin-impregnated fibers 26 around the liner 12 increases. Therefore, the heater 44 is controlled so as to be raised.

  FIG. 8 shows the relationship between the number of laminated resin-impregnated fibers 26 around the liner 12, the temperature of the epoxy resin 46 in the resin tank 32, and the resin adhesion amount of the resin-impregnated fibers 26 in the present embodiment. In FIG. 8, the broken line a represents the relationship between the number of laminated resin-impregnated fibers 26 around the liner 12 and the resin temperature in the resin tank 32, and the solid line b represents the number of laminated resin-impregnated fibers 26 around the liner 12. And the resin adhesion amount of the resin-impregnated fiber 26. As shown by a broken line a in FIG. 8, the heater control means has a small number of laminated resin-impregnated fibers 26 around the liner 12 corresponding to the start of winding of the resin-impregnated fibers 26 around the liner 12, that is, the fiber reinforced resin. When the carbon fiber 24 constituting the inner layer passes over the scraping roller 34 of the resin bath 28, the temperature of the heater 44 is lowered, and the resin temperature in the resin tank 32 is lowered, thereby increasing the resin viscosity. ing.

  Further, the heater control means adjusts the temperature of the heater 44 as time passes for passing the carbon fiber 24 onto the scraping roller 34 in response to the increase in the number of laminated resin-impregnated fibers 26 around the liner 12. By gradually increasing the resin temperature, the resin temperature is gradually increased so that the resin viscosity gradually decreases. In other words, the temperature of the portion of the resin-impregnated fiber 26 wound around the liner 12 first can be made lower than the temperature of the portion of the resin-impregnated fiber 26 wound around the liner 12 later. As a result, as indicated by a solid line b in FIG. 8, the resin adhesion amount of the resin-impregnated fiber 26 can be changed according to the number of the resin-impregnated fibers 26 around the liner 12. That is, the resin adhesion amount can be increased when the number of the resin-impregnated fibers 26 is small, and the resin adhesion amount can be decreased when the number of the resin-impregnated fibers 26 is large. As described above, the manufacturing method of the fiber-reinforced resin container according to the present embodiment changes the temperature of the epoxy resin 46 accommodated in the resin bath 28 to change the inner diameter side of the resin-impregnated fibers 26 wound around the liner 12. The resin adhesion amount on the resin bus 28 with respect to the carbon fibers 24 constituting the portion is made larger than the resin adhesion amount on the resin bus 28 with respect to the carbon fibers 24 constituting the outer diameter side portion. The heater control means also sets the temperature of the heater 44 when the carbon fibers 24 constituting the inner diameter side of the resin-impregnated fibers 26 wound around the liner 12 pass through the resin bath 28, and sets the temperature of the heater 44 outside the resin-impregnated fibers 26. The temperature of the heater 44 when the carbon fiber 24 constituting the diameter side portion passes through the resin bus 28 is made lower.

  5 and 6, the resin bus 28 is provided with a scraper 48 that adjusts the amount of resin adhering to the resin scraping roller 34. The scraper 48 is a blade-shaped resin amount adjusting plate disposed so as to have a predetermined gap between the outer periphery of the resin scraping roller 34. The arrangement position is above the liquid level of the epoxy resin 46 in the resin tank 32 and below the position where the carbon fiber 24 contacts the upper outer periphery of the resin scraping roller 34. The scraper 48 is set so that the blade portion faces the outer peripheral surface of the resin scraping roller 34, and the gap between the scraper 48 and the outer peripheral surface is uniform in the width direction of the resin scraping roller 34. The gap can be adjusted by a scraper moving mechanism (not shown) controlled by the control device 23. The blade portion of the scraper 48 can be moved in a direction indicated by an arrow α in FIGS. 5 and 6 by a scraper moving mechanism. Thus, this embodiment provided with the scraper 48 and the scraper moving mechanism is coupled with the resin temperature adjustable by the heater 44 and the heater control means as described above, and the resin adhesion amount of the resin-impregnated fiber 26 is It becomes possible to adjust more accurately.

  According to such a method for manufacturing a fiber reinforced resin container and a fiber reinforced resin container manufacturing apparatus of the present embodiment, the temperature of the epoxy resin 46 accommodated in the resin bath 28 is changed to be wound around the liner 12. Of the resin-impregnated fibers 26, the resin adhesion amount on the resin bus 28 with respect to the carbon fibers 24 constituting the inner diameter side portion is made larger than the resin adhesion amount on the resin bus 28 with respect to the carbon fibers 24 constituting the outer diameter side portion. For this reason, with the winding of the resin-impregnated fiber 26 around the liner 12, the resin amount on the inner layer side of the high-pressure gas tank is sufficient even though the resin tends to ooze out from between the plurality of fibers from the inner layer side to the outer layer side. It can be easily secured. Further, it is not necessary to excessively increase the outer diameter of the high pressure gas tank. That is, if the fiber volume content in the inner layer of the fiber reinforced resin around the liner 12 (see FIG. 1) is Vfi, and the fiber volume content in the outer layer of the fiber reinforced resin is Vfo, Vfi <Vfo. it can. As a result, the fatigue durability of the high pressure gas tank can be enhanced without excessively increasing the size of the high pressure gas tank.

  In addition, the fiber volume content Vf of the inner layer of the high-pressure gas tank is suppressed not only in the portion that becomes the body portion of the high-pressure gas tank but also in the portion that becomes the dome portion provided at the axial end portion of the high-pressure gas tank. A sufficient amount of resin can be adhered to the inner layer. In the present embodiment, the scraper 48 and the scraper moving mechanism can be omitted. Since other configurations and operations are the same as those of the first embodiment shown in FIGS. 1 to 2 described above, the same parts are denoted by the same reference numerals, and overlapping illustrations and descriptions are omitted.

  In each of the above-described embodiments, the case where the carbon fiber 24 of one fiber bundle sent out from the supply bobbin 42 (see FIG. 4) is impregnated with the resin and the resin-impregnated fiber 26 is wound around the liner 12 has been described. However, the present invention is not limited to such a method. For example, a creel stand having a plurality of bobbin attachment portions is provided as a fiber supply portion, and a plurality of carbon fibers 24 are sent out from the plurality of bobbin attachment portions, respectively, and a plurality of carbon fibers 24 are impregnated with a resin bath 28. Thus, the liner 12 may be wound by parallel winding arranged in the width direction. In this case, the plurality of carbon fibers 24 can be simultaneously passed through the temperature adjusting device 30 or the temperature adjusting guide roller 40 as cooling means. Further, in this case, the plurality of resin-impregnated fibers 26 can be arranged around the liner 12 by the ikuchi guide portion. In each of the above embodiments, a glass layer is provided on the outer side of the fiber reinforced resin as in the case of the carbon fiber reinforced resin tank manufactured by the conventional method shown in FIG. You can also.

It is a partial block diagram of the tank manufacturing apparatus which manufactures a high pressure gas tank with the manufacturing method of the 1st Embodiment of this invention. The number of resin-impregnated fibers stacked and the temperature control device in the case of performing control to gradually increase the temperature of the temperature control device according to the increase in the number of resin-impregnated fibers stacked around the liner by the manufacturing method of the first embodiment It is a figure which shows the relationship with temperature. It is a partial block diagram of the tank manufacturing apparatus which manufactures a high pressure gas tank with the manufacturing method of the 2nd Embodiment of this invention. It is a partial block diagram of the tank manufacturing apparatus which manufactures a high pressure gas tank with the manufacturing method of the 3rd Embodiment of this invention. It is a schematic sectional drawing which shows a resin bus part in the tank manufacturing apparatus which manufactures a high pressure gas tank with the manufacturing method of the 4th Embodiment of this invention. It is an enlarged view of FIG. 5 including the temperature control structure of a resin tank. It is a figure which shows one example of the relationship between the resin temperature in a resin tank, and resin viscosity. In 4th Embodiment, it is a figure which shows the relationship between the number of lamination | stacking of the resin impregnation fiber around a liner, the resin temperature in a resin tank, and the resin adhesion amount of a resin impregnation fiber. 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 molding part, 23 controller, 24 carbon fiber, 26 resin impregnated fiber, 28 resin bath, 30 temperature control device, 32 resin tank, 34 Resin scraping roller, 36 front roller, 38 rear roller, 40 temperature control guide roller, 42 supply bobbin, 44 heater, 46 epoxy resin, 48 scraper.

Claims (5)

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
A method for producing a fiber-reinforced resin container, comprising cooling a resin-impregnated fiber before being wound around a liner or a fiber before passing through a resin bath. 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;
And a cooling means for lowering the temperature of the resin-impregnated fiber before being wound around the liner or the fiber before passing through the resin bath. In the fiber reinforced resin container manufacturing apparatus according to claim 2,
The fiber-reinforced resin container manufacturing apparatus, wherein the cooling means is a temperature adjusting device or a guide roller capable of lowering the temperature of the resin-impregnated fiber or fiber by passing the resin-impregnated fiber or fiber. 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
By changing the temperature of the resin contained in the resin bath, the resin adhesion amount on the resin bath to the fibers constituting the inner diameter side portion of the resin-impregnated fibers wound around the liner is changed to the resin bath for the fibers constituting the outer diameter side portion. The manufacturing method of the container made from a fiber reinforced resin characterized by making more than the resin adhesion amount in. 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 4,
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 temperature control unit capable of adjusting the temperature of the resin contained in the resin bath;
Temperature control unit control means for controlling the temperature of the temperature control unit,
The temperature control unit control means configures the temperature of the temperature control unit when the fibers constituting the inner diameter side portion of the resin impregnated fibers wound around the liner pass through the resin bath, and configures the outer diameter side portion of the resin impregnated fibers. An apparatus for producing a fiber-reinforced resin container, characterized in that the temperature of the temperature adjusting unit is lower than the temperature of the temperature adjusting unit when the fibers to be passed through the resin bath.

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