JP3136433B2 - Filament winding molding method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to FRC, FRP, FR
Applied to the molding of fiber preforms of fiber reinforced composite materials such as M, C / C, etc. For example, in molding of heat-resistant composite material combustor liners for gas turbines, excessive amounts of ceramic fibers, glass fibers, carbon fibers, etc. The present invention relates to a filament winding molding method and a device suitable for molding a reinforcing fiber preform in which characteristics are likely to deteriorate due to tension or twist.

[0002]

2. Description of the Related Art A fiber preform of a fiber reinforced composite material is formed by filament winding while maintaining a constant tension from a fiber unwinding portion to a winding portion. In the molding by the tension control, the slack of the fiber generated during the molding is prevented, and the wound fiber is prevented from being deformed. In addition, when it is necessary to attach a polymer or the like to the fiber and wind it, it is necessary to perform a fiber opening process in which the fiber bundle is opened from the fiber bundle into individual fibers in a low tension state before the polymer is attached. The tension before and after the fiber opening process is controlled by constraining the fibers by a pinch roller or the like.

[0003] As shown in Fig. 5, a fiber 03 sent from a fiber feed port 02 reciprocating in parallel with a rotating winding die 01 is held at a predetermined position. It is performed by winding it on a take-up mold 01. That is, the winding mold 01 rotates while maintaining a predetermined position in the axial direction by the shaft 012 driven by the drive chain 08 from the pulley provided on the output shaft of the motor 07. A drive pin 013 is provided on the helical gear 09 provided at the output shaft end of the motor 07 and on a chain 011 circling around four rollers by a transmission mechanism connected thereto. The drive pin 013 is inserted into a track 012 provided at the lower end of the shuttle 010. The drive pin 013 moves up and down in the track 012 at both ends of the chain 011. 01 is reciprocated in the axial direction.

The shuttle 010 is unwound from the bobbin winding 04 by the winding force of the winding die 01 on the top of the shuttle 010.
Fiber 03 tensioned by tensioner 05
Is provided with a resin bath 06 for attaching a polymer or the like to perform surface treatment. In addition, this resin bus 06
Is provided with a fiber feed port 02. The fiber feed port 0 moving in the axial direction of the winding die 01 is provided in the axial direction on the outer peripheral surface of the fixed and rotating winding die 01.
The fibers 03 sent out from 2 are arranged to form a convex-shaped container. The arrangement of the fibers 03 can be arbitrarily set such as parallel winding, helical winding, polar winding, and level winding by selecting the rotation speed of the winding die 01 and the traversing speed of the fiber feed port 02.

However, many reinforcing fibers used in heat-resistant composite combustor liners for gas turbines are fibers having high elasticity and high susceptibility to cracks on the fiber surface. To the fiber, to deteriorate the fiber properties, and by moving the fiber delivery port 02, to impart a twist to the fiber between the fiber unwinding and delivery,
For this reason, there are disadvantages such as deterioration of fiber properties and loss of strength of the final product.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a tension control for performing unwinding and winding of fibers with a minimum necessary tension, and a method of unwinding and unwinding from unwinding fibers. An object of the present invention is to provide a filament winding molding method and a molding apparatus by feeding the fiber in which the fiber direction is not changed so that the fiber is twisted during taking.

[0007]

Therefore, the filament winding molding method of the present invention employs the following means. (1) In order to prevent the fiber properties from being degraded due to the tension, in the fiber unwinding step, the fiber is unwound by applying the minimum tension required for unwinding and feeding the fiber to the fiber. In the winding step, the fiber is wound with a minimum tension required for winding the fiber around a winding die. (2) In order to prevent fiber properties from being deteriorated due to twisting of the fiber, in the winding step, the fiber is unwound from the previous step, and the fiber is fed into a substantially same vertical plane as the path of the fiber to be fed. The winding was performed by a winding die that reciprocated in the axial direction in accordance with the arrangement of the fibers, and the fibers were wound without causing twisting.

The filament winding molding apparatus of the present invention employs the following means. (3) A fiber provided between a delivery roller for sending out the fiber unwound from the unwinding portion and an impregnating roller for performing surface treatment of the fiber and having a slack amount of the fiber in the slack portion which is substantially constant. And a delivery speed control device for sending and controlling the delivery speed command to the delivery roller. (4) A dancer roll for generating the tension required for winding the fiber is suspended from the fiber sent out from the impregnating roller, and the dancer roll is placed at a position where the minimum tension required for winding the fiber is generated on the fiber. A winding speed adjusting device for outputting a speed command to the winding die to control the winding speed and controlling the speed command is provided. (5) Winding that reciprocates the fiber in the direction of the rotation axis in substantially the same plane as the vertical surface formed in the path of the fiber sent out from the impregnation roller so that the fiber sent out from the impregnation roller does not move in the left-right direction. A delivery port was provided on the outer peripheral surface of the mold so that the delivery was performed.

[0009]

According to the filament winding molding method of the present invention, excessive tension is applied to the fiber unwound from the unwinding part.
It can be wound into a winding die without giving a twist and without deteriorating fiber characteristics, and a fiber preform with excellent strength can be formed by filament winding.

Further, according to the filament winding apparatus of the present invention, regarding the control of the tension of the fiber, a fiber slack portion is provided between the delivery roller and the impregnation roller;
The amount of slack in the fiber at this portion is detected at the fiber level, and the fiber sending speed of the sending roller is adjusted based on the detected amount to keep the amount of slack constant.

[0011] Further, with respect to the winding of the fiber, winding can be performed with a minimum necessary tension by a tension control device using a dancer roll provided between the impregnating roller and the winding section.

[0012] Regarding the twist control of the fiber, the fiber path from the impregnating roller to the winding die is arranged in a substantially straight line, and the relative movement of the fiber with the winding die in the direction of the rotation axis during winding is winding. By moving the mold, twisting of the fiber can be prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a filament winding molding apparatus according to the present invention will be described based on embodiments. FIG. 1 is a view showing an embodiment of a filament winding molding apparatus according to the present invention. FIG. 1 (A) is an overall plan view, and FIG. 1 (B) is a side view. This embodiment is provided for manufacturing a fiber preform of a combustor liner for a gas turbine.

In the figure, 1 is a bobbin wound fiber, 2 is a torque motor, 3 is a delivery roller, 4 is a fiber level sensor, 5 is a sizing material removing device, 6 is a fiber opening device, 16 is an impregnating device, 7 is Winding tension control device, 8 is a delivery port, 9
Denotes a winding device and 10 denotes a winding type. The fiber 11 is a silicon carbide fiber (tyrano fiber manufactured by Ube Industries, Ltd.) synthesized by melting and spinning a polymer, and the impregnating liquid is xylene of polycarbosilane (E-08 manufactured by Nippon Carbon Co., Ltd.). The solution was used. Using these materials, a fiber preform was formed using the forming apparatus shown in FIG.

Hereinafter, each part of this embodiment will be described.

A. Unwinding section The fiber 11 unwound from the bobbin winding 1 is fed to a delivery roller 3 provided in a delivery control section B a required number of times (for example, 5
Winding) The wound surface of the delivery roller 3 and the fiber 11
, The rotational force of the delivery roller 3 is changed into a driving force for unwinding the fiber, and the fiber is unwound. Further, in order to keep the tension of the fiber 11 unwound from the bobbin winding 1 constant, a torque motor 2 is disposed coaxially with each bobbin winding 1, and the torque motor 2 is arranged in the unwinding direction of the fiber 11. Means that the tension is controlled by rotating in the opposite direction. That is, when the fiber 11 between the bobbin winding 1 and the delivery roller 3 becomes slack, the rotation torque of the bobbin winding 1 is prevented by controlling the torque motor 2. Further, the tension control of the fiber 11 is adjusted by varying the output voltage from a power controller (not shown) attached to the torque motor 2.

B. Delivery tension control unit The delivery tension control unit includes the delivery roller 3 driven by the DC servo 14 and the fiber level sensor 4 for applying a low tension to the delivered fiber 11. Delivery roller 3
The upper and lower 2 so as not to damage the surface of the fiber 11 to be sent out.
The roller 11 is arranged so that the axial inclination of the lower small roller is changed from the axial inclination of the upper large roller, and the fiber 11 is wound around each of these rollers about five times.
The frictional force sent out is dispersed as much as possible to reduce it. The fiber contact surface of the delivery roller 3 is buffed or the like so that the surface finish is reduced to about 0.5S with less irregularities so as not to damage the surface of the wound fiber 11. The fiber 11 sent from the sending roller 3 passes through the fiber level sensor 4.

In this fiber level sensor 4, a light weight 17 of a few grams (for example, 2 g) using a Teflon O-ring that moves up and down along a standing guide rod is hung on The fiber 11 is stretched by tension, and this fiber 11
Is detected by the light detection level sensor 15 installed at a fixed position of the guide rod, the slack state of the fiber 11 is detected, and according to the slack state, the sending roller 3 is detected.
And the automatic control is performed such that the slack amount becomes constant.

That is, the fiber level sensor 4 has a set of three guide rods as a yarn path, and six light detection level sensors 15 are mounted on the guide rods. A weight 17 made of a Teflon O-ring of about 2 g suspended on the guide rod moves up and down on the guide rod according to the slack of the fiber 11.
The fiber 11 which is moved up and down by being pulled by 7 is detected by a light detection level sensor 15 provided on a guide rod, and the slack amount of the fiber 11 is detected.

The signals from the four sensors HH, H, L, and LL whose six light detection levels are provided at the center of the sensor 15 are used for speed control for sending out the fiber 11 as speed adjustment signals. The data is fed back to the DC servo motor 14 of the delivery roller 3 and is used for controlling the speed of the delivery roller 3. The signals from the upper and lower fiber sensors are used for an emergency stop signal of the delivery roller 3. In addition, the momentary level signal of the fiber 11 detected by detecting the slack position by the fiber level sensor 4 is automatically sent to the driver.

C. Surface treatment part The surface treatment part comprises a desize furnace 5 for removing the sizing material of the fibers 11, a fiber opening device 6 for loosening the desized fibers, and an impregnation device 16 for impregnating the loosened fibers with a polymer solution.

The desize furnace 5 heats and removes a sizing material, such as polyvinyl alcohol (PVA), sizing the fibers 11 sent from the sending tension control unit B.

The fiber opening device 6 is used to facilitate the impregnation of the polymer liquid impregnating the fiber exiting the sizing furnace 5 with
By blowing air from below the fibers 11 passing through the tapered container, the yarns of the fibers 11 are spread and the sizing material is blown off and loosened.

The impregnating device 16 is a gear type roller-shaped impregnating roller 12 which is installed in a semi-submerged state in a polymer solution tank.
The fiber 11 is immersed in a polymer solution, and the fiber 11 is impregnated with the polymer solution. In the impregnation by the impregnation roller 12,
A uniform polymer solution can be scraped up, and immersion without unevenness can be performed.

D. Winding Tension Control Unit Since the shape of the winding die 10 in the winding unit E described later is not constant, the tension applied to the fiber 11 may change. Therefore, it is necessary to make the feeding speed of the impregnated fiber 11 coming out of the impregnation roller 12 and the winding speed of the winding die 10 almost the same, and to keep the tension applied to the fiber 11 constant. .

Therefore, as shown in FIG.
The polymer solution is impregnated with the fiber, and the dancer roll 13 is hung on the fiber 11 sent out to the winding tension control unit by the impregnation roller 12 via the guide roller 18. The weight was hung so as to apply the minimum tension required for winding to the fiber 11. However, in the case of the present embodiment, the load due to the weight was set to zero, and only the weight of the dancer roll 13 was used. Then, the position of the dancer roll 13 is detected by the potentiometer 19, and this signal is sent to the driver of the winding die 10, and the tension of the fiber 11 is sent to the winding unit E with the minimum tension necessary for winding. I did it.

E. Winding unit In the winding unit, the fiber 11 sent out from the outlet 8 is
Winding is performed by a winding die 10 which is rotated by a winding device 9 and reciprocated in the direction of the rotation axis, thereby producing a molded body having a required shape.

That is, as shown in FIG. 3, the winding device 9 is driven by a driving force transmitted from a DC servomotor 20 to a clutch 24 via a gear box 21, a speed reducer 22, and a transmission 23. The pinion gear 26 meshing with the rack gear 27 is rotated through the
Reciprocate above. Further, the driving force from the AC servomotor 20 branched by the gear box 21 rotates the winding die 10 reciprocating on the rack gear 27 together with the winding device 9 via the speed reducer 28.

The winding surface of the winding die 10 is not a straight cylinder, but may be formed on a complex uneven surface that is axially symmetrical.
The position of the winding surface is detected by optical sensors installed vertically above and below the end of the winding die 10 so as to be able to move following the irregularities of the winding surface of the winding surface of the winding die 10.
Is brought close to or retracted from the winding die 10 from the front and rear, thereby performing position control for keeping the front and rear position between the outlet 8 and the winding die 10 constant.

The rotation of the winding die 10 by the winding device 9 is controlled by the position information of the dancer roll 13 from the potentiometer 19 as described above. The minimum tension necessary for winding is applied. The delivery port 8 is arranged in such a manner that the fiber 11 is delivered to the winding die 10 in the same vertical plane including the path of the fiber 11 delivered to the delivery port 8 via the impregnation roller 12 and the dancer roller 13. The fibers 11 sent out from the impregnating roller 12 do not move out of the vertical plane and move left and right.

Further, the winding die 10 is configured so that the fiber 11 is moved in the axial direction and the fiber 11 is wound around the delivery port 8 for sending out the fiber 11 from a fixed position, thereby providing a low tension. Winding becomes possible, and twisting of the fiber 11 which has conventionally occurred by winding does not occur. The winding pitch of the fiber 11 around the winding die 10 is:
Winding can be performed with the number of windings set by transmitting the rotation of the winding die 10 and using the continuously variable transmission 23 of the winding device 9. It is made possible by operating.

An embodiment of the filament winding forming apparatus according to the present invention has been described above for each part. The entire apparatus according to the present embodiment is controlled as shown by a control block shown in FIG.

That is, in the fiber unwinding step, the slack amount of the fiber 11 in the delivery tension control section B is detected by the light detection level sensor 15, and based on this signal, the fiber 11 unwound from the delivery roller 3 is detected. Unwinding is performed with the tension set at a minimum necessary for unwinding of about 2 g. In the winding step, the position of the dancer roll 13 in the winding tension controller D is detected by a potentiometer 19, and based on this signal, the tension of the fiber 11 wound by the winding die 10 is required for winding. It is wound up to a minimum of about 7 g.

Therefore, unwinding and feeding out the fiber 11
The tension generated in the fiber 11 by the winding becomes significantly smaller than that in the conventional apparatus, and the deterioration of the characteristic generated in the fiber due to excessive tension can be avoided.

The unwinding section A, the sending tension control section B, the surface treatment section C, and the winding tension control section D are arranged in a straight line.
The fiber 11 passed through each of the windings is reciprocated in the direction of the rotation axis thereof while maintaining the direction in which the fiber 11 has passed from the delivery port 8 provided in the winding section E. The fiber 11 is sent out to the take-up die 10 and wound up without bending the fiber 11 right and left.

Accordingly, the occurrence of twisting in the fiber 11 due to the winding of the fiber 11 is significantly smaller than that of the conventional apparatus, and the deterioration of characteristics, which has occurred in the fiber due to excessive twisting, can be avoided. .

Further, by making the winding with a small twist, it is possible to further reduce the minimum fiber tension required for the winding.

[0038]

As described above, according to the filament winding molding method of the present invention, an excessive tension and twist are imparted to the fiber unwound from the unwinding portion by the structure according to claim 1. Since it can be wound around a winding die without deteriorating fiber characteristics, it is possible to form a fiber preform excellent in strength by filament winding.

Further, according to the filament winding apparatus of the present invention, according to the configuration of claim 2, (1) the fiber can be almost sent out in a tensionless state and the winding can be performed with a minimum necessary tension. . (2) The fiber can be wound while preventing twisting of the fiber.

Thus, the fiber preform of the fiber-reinforced composite material can be molded without deteriorating the properties of the reinforcing fiber, which can contribute to the improvement of the strength after the synthesis of the composite material.

[Brief description of the drawings]

FIG. 1 is a view showing the entire filament winding molding apparatus of the present invention, FIG. 1 (A) is a plan view, FIG. 1 (B) is a side view,

FIG. 2 is a front view showing details of a winding tension control unit in FIG. 1;

FIG. 3 is a plan view showing details of a winding unit in FIG. 1;

FIG. 4 is a control block diagram for controlling the embodiment shown in FIG. 1;

FIG. 5 is a side view of a conventional filament winding device.

[Explanation of symbols]

 Reference Signs List A Unwinding unit B Sending tension control unit C Surface treatment unit D Winding tension control unit E Winding unit 1 Bobbin winding 2 Torque motor 3 Sending roller 4 Fiber level sensor 5 Desize furnace 6 Spreading device 7 Winding tension control Apparatus 8 Delivery port 9 Winding device 10 Winding type 11 Fiber 12 Impregnation roller 13 Dancer roller 14 DC servo for delivery roller 15 Light detection level sensor 16 Impregnation device 17 Weight 18 Guide roller 19 Potentiometer 20 DC servomotor 21 for winding Gear box 22 Reduction gear 23 Transmission 24 Clutch 25 Reduction gear 26 (for running) gear 27 Rack gear 28 Reduction gear 29 DC servo for impregnating roller 30 Control panel

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kenichiro Iga 2-8-1, Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd. Seishin Plant Co., Ltd. 72) Inventor Junzo Fujioka 2-81-1, Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd. Seishin Plant Co., Ltd. 26, Nishikujo-Karatocho, Minami-ku, Kyoto-shi Kato Tech Co., Ltd. (56) References JP-A-6-285999 (JP, A) Jiko 5-23322 (JP, Y2) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 70/16

Claims (2)

(57) [Claims] In a filament winding forming method for forming a fiber preform of a fiber-reinforced composite material comprising a fiber unwinding step, a surface treatment step, and a winding step, a fiber winding in the fiber unwinding step and the winding step is performed. Unwinding and winding are performed with the minimum necessary fiber tension to prevent deterioration of fiber characteristics due to the tension, and the winding of the fiber in the winding step turns the fiber sent out from the surface treatment step right and left. A filament winding molding method characterized in that the fiber characteristics are prevented from deteriorating due to winding and winding by a winding die that moves out and moves in the axial direction without performing. 2. A filament winding molding apparatus for unwinding a bobbin-wound fiber, sending it out, performing a surface treatment, and winding it around a winding die to form a fiber preform of a fiber-reinforced composite material precursor. A device for adjusting the sending speed by outputting a speed command to the sending roller to make the slack amount of the fiber between the sending roller to be sent out and the impregnating roller performing the surface treatment substantially constant, and to make the tension constant, An apparatus for adjusting the winding speed by outputting a speed command to the winding die to hold the dancer roll suspended from the fiber sent out from the impregnating roller at a substantially constant position and to keep the tension of the fiber constant. The winding die that reciprocates in the axial direction is provided with a delivery port for delivering the fibers from a substantially same vertical plane as the path of the fibers delivered from the impregnation roller. And a filament winding molding apparatus.