JP2011005660A - Filament winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filament winding method achieving the speedup of winding.SOLUTION: In the filament winding method including a hoop winding process for winding a resin impregnated fiber by hoop winding and a helical winding process for winding the resin impregnated fiber by helical winding, the temperature of the resin impregnated fiber in the helical winding process is controlled so as to be lower than that of the resin impregnated fiber in the hoop winding process.

Description

  The present invention relates to a filament winding method for winding a resin-impregnated fiber around a member to be wound.

  In recent years, development of high-pressure hydrogen tanks used in fuel cell systems has progressed, and one of them is the winding of resin-impregnated fibers around the tank by the filament winding (hereinafter simply referred to as “FW”) method. There is a way.

  As one of the methods for manufacturing a tank adopting the FW method, a technique has been proposed in which resin-impregnated fibers before winding are cooled when constituting the inner diameter side portion and heated when constituting the outer diameter side portion. (Patent Document 1). With this configuration, the fatigue durability performance of the tank can be enhanced.

JP 2008-290308 A

  However, in the conventional technique, the resin-impregnated fiber is slippery at the dome portion of the tank (portion outside the body portion in the longitudinal direction) when performing helical winding, and it is difficult to increase the winding speed. there were.

  The present invention has been made in view of the above problems, and aims to increase the winding speed.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1] In a filament winding method including a hoop winding step of winding a resin-impregnated fiber by hoop winding and a helical winding step of winding the resin-impregnated fiber by helical winding, the filament winding method includes: A filament winding method, wherein the temperature of the resin-impregnated fiber is controlled to be lower than the temperature of the resin-impregnated fiber in the hoop winding step.

  According to the filament winding method having the above configuration, the temperature of the resin-impregnated fiber is controlled to be low in the helical winding process, so that the resin-impregnated fiber has high viscosity and high tack and prevents the resin-impregnated fiber from slipping during winding. can do. Accordingly, the winding speed can be increased.

  The filament winding method can also be realized in the form of an apparatus invention.

It is explanatory drawing which shows schematic structure of the FW apparatus 100 which employ | adopted the FW method in 1st Example of this invention. 3 is a flowchart showing a fiber temperature control process executed by a control unit 50. It is a graph which shows the relationship between the temperature about the resin impregnation fiber W, and a viscosity.

  Hereinafter, embodiments of the present invention will be described based on examples.

A. First embodiment:
A-1. Hardware configuration:
FIG. 1 is an explanatory diagram showing a schematic configuration of an FW device 100 employing the FW method according to the first embodiment of the present invention. As illustrated, the FW device 100 according to the present embodiment includes a creel stand 10, a winding unit 30, a path unit 20 that connects the creel stand 10 and the winding unit 30, and a control unit 50.

  The creel stand 10 includes a plurality of bobbins 12 around which resin-impregnated fibers W are wound, and has a function of unwinding the resin-impregnated fibers W from each bobbin 12 in a predetermined direction using a fixed pulley 14 or the like. The resin-impregnated fiber W is, for example, a prepreg in which carbon fibers are impregnated with an epoxy resin that is a thermosetting resin. In addition, it can replace with carbon fiber and can also set it as the other material suitable for the filament winding which has suitable intensity | strength. Moreover, it can replace with an epoxy resin and can also be set as the resin material suitable for the filament winding which has suitable joint strength.

  From each bobbin 12, the resin-impregnated fiber W is drawn out by the action of the winding part 30, and each resin-impregnated fiber W is guided to the winding part 30 via the path part 20.

  The path portion 20 includes a roller, a guide, and the like, and constitutes a path from the creel stand 10 to the resin-impregnated fiber W to the winding portion 30.

  The winding unit 30 includes an ikuchi guide 32 and a rotation driving device 34 on which the liner M is set. The liner M is a hollow cylindrical mandrel for shaping the shape of the tank product. The rotation driving device 34 drives the liner M to rotate around its long axis.

  The ikuchi guide 32 is supplied from the path unit 20 by moving in the three dimensions of the x-axis which is the major axis direction of the liner M, the y-axis perpendicular to the x-axis, the x-axis and the z-axis perpendicular to the y-axis A plurality of resin-impregnated fibers W are bundled and supplied toward the liner M. The resin-impregnated fiber W is tightly wound around the liner M by the movement of the ikuchi guide 32 in the three-dimensional direction and the rotation of the liner M by the rotation driving device 34. In detail, close winding is realized by alternately performing hoop winding and helical winding. Here, the helical winding is a method of winding the resin-impregnated fiber W around the liner M at a certain angle (for example, 30 ° to 60 °). In the hoop winding, the resin-impregnated fibers W are aligned and wound in the circumferential direction.

  By winding the resin-impregnated fiber W around the liner M by the winding unit 30, the resin-impregnated fiber W is pulled out from the creel stand 10 and reaches the winding unit 30 via the path unit 20. It will be. Thus, a high-pressure tank that is a molded product is manufactured. This high-pressure tank is used as a high-pressure hydrogen tank for a fuel cell system.

  The ikuchi guide 32 also includes a temperature adjustment mechanism that adjusts the temperature of the resin-impregnated fiber W that passes therethrough. A balloon BL in the drawing indicates a schematic configuration of the temperature adjustment mechanism. As shown in the blowout BL, the ikuchi guide 32 includes a temperature control roller 40 provided along the resin-impregnated fiber W. The temperature control roller 40 is made of a metal material (for example, aluminum) having excellent thermal conductivity, and is in direct contact with the resin-impregnated fiber W. The temperature adjustment roller 40 is supplied with temperature-adjusted water from a temperature adjustment water supply unit 42 provided outside the ikuchi guide 32 via a pipe 44.

  The temperature-controlled water supply unit 42 switches between high-temperature water and cooling water as temperature-controlled water. The temperature adjustment water supply unit 42 controls the temperature adjustment roller 40 to a predetermined temperature exceeding 0 ° C. (hereinafter, this temperature is referred to as “high temperature”) by supplying high temperature water to the temperature adjustment roller 40. Can do. The temperature adjustment water supply unit 42 controls the temperature adjustment roller 40 to a predetermined temperature of 0 ° C. or lower (hereinafter, this temperature is referred to as “low temperature”) by supplying cooling water to the temperature adjustment roller 40. can do.

  Note that a plurality of temperature control rollers 40 may be provided as shown in the figure, or one temperature control roller 40 may be provided.

  The control unit 50 is configured as a microcomputer including a CPU, a RAM, and a ROM therein, and expands and executes a computer program stored in the ROM in the RAM, thereby performing the filament winding operation by hoop winding and helical winding. Switch between and alternately. That is, the control unit 50 performs a hoop winding step of winding the resin-impregnated fiber W by hoop winding and a helical winding step of winding the resin-impregnated fiber W by helical winding.

  Further, the control unit 50 executes a computer program stored in the ROM, thereby transmitting a command to the temperature adjustment water supply unit 42, and setting the temperature of the resin-impregnated fiber W between the high temperature and the low temperature. Perform switching control.

A-2. Software configuration:
FIG. 2 is a flowchart showing the fiber temperature control process executed by the control unit 50. This fiber temperature control process is for controlling the temperature of the resin-impregnated fiber W described above. This fiber temperature control process is repeatedly executed at predetermined time intervals by the CPU of the control unit 50.

  As shown in FIG. 2, when the process is started, the CPU determines which of the hoop winding process and the helical winding process described above is currently being executed (step S110). Here, when it is determined that it is the hoop winding process, the CPU transmits a command to supply high-temperature water to the temperature-controlled water supply unit 42 (step S120). On the other hand, when it determines with it being a helical winding process, CPU transmits the command to the effect of supplying cooling water to the temperature control water supply part 42 (step S130). After executing step S120 or S130, the process returns to “return” to end the fiber temperature control process.

  According to the fiber temperature control process having the above configuration, since the high temperature water is supplied from the temperature adjustment water supply unit 42 during the hoop winding process, the temperature adjustment roller 40 is controlled to the high temperature. For this reason, the temperature of the resin-impregnated fiber W in the hoop winding process is controlled to be high. On the other hand, since the cooling water is supplied from the temperature adjustment water supply unit 42 in the helical winding process, the temperature adjustment roller 40 is controlled to the low temperature. For this reason, the temperature of the resin-impregnated fiber W in the helical winding process is controlled to be low.

  FIG. 3 is a graph showing the relationship between temperature and viscosity for the resin-impregnated fiber W. As shown in this graph, the viscosity increases as the temperature of the resin-impregnated fiber W decreases. When the temperature of the resin-impregnated fiber W is lower than t1 (for example, 10 ° C.) in the figure, the viscosity of the resin-impregnated fiber W exceeds 100 Pa · s, and the resin-impregnated fiber W has high viscosity and high tack. That is, 100 Pa · s is a viscosity level equivalent to that of chickenpox, and the resin-impregnated fiber W has a high tack property.

  When the temperature of the resin-impregnated fiber W exceeds t2 (for example, 45 ° C.) in the figure, the viscosity of the resin-impregnated fiber W exceeds 100 Pa · s, and the resin-impregnated fiber W has low viscosity and low tack.

  In this embodiment, the low temperature at which the temperature control roller 40 is controlled is sufficient to set the resin-impregnated fiber W to a temperature below the t1. The high temperature at which the temperature control roller 40 is controlled is sufficient to make the resin-impregnated fiber W have a temperature higher than the above t2. Therefore, the resin-impregnated fiber W in the helical winding process is controlled to a temperature lower than the above-described t1, and is in a state of high viscosity and high tack. On the other hand, the resin-impregnated fiber W in the hoop winding process is controlled to a temperature higher than the above-described t2 and is in a low viscosity / low tack state.

A-3. effect:
According to the FW method of the first embodiment configured as described above, the temperature of the resin-impregnated fiber W is controlled to be low in the helical winding process, so that the resin-impregnated fiber W has a high viscosity and a high tack. It is possible to prevent the resin-impregnated fiber W from slipping during application. As a result, in the conventional helical winding at a medium angle of 40 ° to 50 °, it has been difficult for the resin-impregnated fiber W to slip and wind at the dome portion of the liner, but according to the first embodiment, it is easily wound. You can also. Therefore, it is possible to increase the winding speed in the filament winding method.

  On the other hand, in the hoop winding process, since the resin-impregnated fiber W is in a low viscosity and low tack state, the occurrence of fluffing can be prevented even though the hoop winding is performed at a high speed.

  In this embodiment, since the resin-impregnated fiber W and the temperature control roller 40 are in direct contact with each other, the temperature adjustment efficiency is good. In particular, when the tank is molded, the resin-impregnated fiber W is constantly moving, so it is more efficient to adjust the temperature by direct contact.

A-4. Variation:
In the present embodiment, the temperature control roller 40 is configured to supply the high-temperature water and the cooling water by switching, but instead, the state of supplying the cooling water and the state of not supplying the cooling water are switched. It is good also as a structure. Also by this, since the resin-impregnated fiber W in the helical winding process can be set to a low temperature, slipping during winding in the helical winding process can be prevented.

B. Second embodiment:
In the first embodiment, the resin-impregnated fiber W in the helical winding process is controlled to a low temperature, and the resin-impregnated fiber W in the hoop winding process is controlled to a low temperature. Instead, in the second embodiment, As in the above-described modification, the cooling water is supplied to the temperature control roller 40 in the helical winding process, and the cooling water is not supplied to the temperature control roller 40 in the hoop process. Then, the air conditioning in the room including the FW device is controlled to a temperature at which the resin-impregnated fiber W can be maintained in a low viscosity state. With this configuration, the resin-impregnated fiber W is in a low-viscosity state at the feeding portion from the creel stand 10.

  According to the FW method of the second embodiment having the above-described configuration, it is possible to prevent the resin-impregnated fibers W from adhering to each other during the feeding from the creel stand 10 and smooth out the feeding.

C. Third embodiment:
In the first embodiment, the temperature of the temperature adjustment roller 40 is controlled so that the viscosity of the resin-impregnated fiber W can be changed depending on whether the helical winding or the hoop winding is used. In the third embodiment, in addition to having this configuration of the first embodiment, in the helical winding process, depending on the number of laminated resin-impregnated fibers W on the tank and the tension of the resin-impregnated fibers W at the time of winding, It is good also as a structure which controls the temperature of the temperature control roller 40. FIG.

  In general, when the number of laminated resin-impregnated fibers W increases, the dome shape of the tank changes, and slipping hardly occurs due to the surface roughness of the fibers themselves. For this reason, in the helical winding process, the resin-impregnated fiber W is not always increased in viscosity, but depending on the number of the resin-impregnated fiber W stacked on the tank and the tension of the resin-impregnated fiber W at the time of winding. It becomes possible to adjust the viscosity. Therefore, FW can be performed in an appropriate viscosity state, and the winding speed can be increased.

  The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modes without departing from the gist thereof. For example, temperature control of the temperature control roller 40 can be performed. Can be modified into various configurations such as a configuration in which air is adjusted by temperature instead of temperature-controlled water.

DESCRIPTION OF SYMBOLS 10 ... Creel stand 12 ... Bobbin 14 ... Fixed pulley 20 ... Path | route part 30 ... Winding part 32 ... Ikuchi guide 34 ... Rotation drive device 40 ... Temperature control roller 42 ... Temperature control water supply part 44 ... Pipe line 50 ... Control part W ... Resin impregnated fiber M ... Liner

Claims (1)

A hoop winding step of winding the resin-impregnated fiber by hoop winding;
A filament winding method comprising: a helical winding step of winding the resin-impregnated fiber by helical winding;
A filament winding method, wherein the temperature of the resin-impregnated fiber in the helical winding step is controlled to be lower than the temperature of the resin-impregnated fiber in the hoop winding step.

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