JPH06285999A - Manufacture of fiber-reinforced resin laminate - Google Patents

Abstract

PURPOSE:To provide a method for manufacturing a fiberreinforced resin laminate in which feather, cut, etc., does not occur on the fiber and which can produce the laminate having high quality with high productivity. CONSTITUTION:A method for manufacturing a fiber-reinforced resin laminate comprises the steps of winding fiber 14 impregnated with resin in which fiber 1 is impregnated with curable resin 41 on a periphery of a core 7 through a fiber discharging unit 6, and curing it. The method further comprises the steps of passing the fiber 1 before impregnating with the resin 41 through a sag controller 2, sensing sag of the fiber 14 between a curable resin impregnating unit 4 and the unit 6, operating the controller 2 according to a signal from a sensor 5 to supply the fiber 14 from the unit 6 to the core 7 in a state without sag.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber-reinforced resin laminate, and more particularly, by supplying resin-impregnated fibers to a core die via a fiber delivery device with almost no sagging, excellent quality is achieved. The present invention relates to a method for producing a fiber-reinforced resin laminate with high productivity.

[0002]

2. Description of the Related Art Conventionally, for example, as described in Japanese Patent Publication No. 4-41044, resin-impregnated fibers obtained by impregnating fibers with a curable resin are wound around a core die through a fiber drawing device and cured. There is known a method for producing a fiber-reinforced resin laminate. In the method for producing a fiber-reinforced resin laminate described in Japanese Patent Publication No. 4-41044, the resin-impregnated fiber can be moved up and down in order to supply the curable resin-impregnated fiber to the core mold without dropping from the fiber drawing device. It passes through a tension roll.

[0003]

However, in the method for producing a fiber-reinforced resin laminate described in Japanese Patent Publication No. 4-41044, a curable resin-impregnated fiber is formed into a core type without dripping from a fiber drawing device. Since the resin-impregnated fiber is passed through the tension roll for supply, the frictional resistance between the resin-impregnated fiber and the tension roll is large due to the change in viscosity of the curable resin over time or the curing reaction, and the fiber has fluff, breakage, etc. It was difficult to produce a fiber-reinforced resin laminate having excellent quality with high productivity.

The present invention has been made in view of the problems in the conventional method for producing a fiber-reinforced resin laminate using such a tension roll, and its object is to solve the above problems. However, it is an object of the present invention to provide a method for producing a fiber-reinforced resin laminate, which is capable of producing a fiber-reinforced resin laminate with excellent quality without producing fluff, breakage, or the like in the fiber with high productivity.

[0005]

In order to achieve the above object, a method for producing a fiber-reinforced resin laminate according to the present invention comprises a resin-impregnated fiber obtained by impregnating a fiber with a curable resin through a fiber delivery device. In the method for producing a fiber-reinforced resin laminate that is wound around and cured, the fibers before being impregnated with the curable resin are passed through a dripping control device, and then the dripping of the resin-impregnated fiber is detected by a detection device, The resin impregnated fiber is supplied to the core die via the fiber pulling device by operating the dripping control device in accordance with the signal of No.

The fibers used in the method of the present invention are not particularly limited, but for example, inorganic fibers such as glass fibers and carbon fibers, aramid fibers, P
Organic fibers such as ET fibers can be used.

The curable resin used in the method of the present invention is not particularly limited, but for example, unsaturated polyester resin, epoxy resin and the like can be used.

In the method of the present invention, as the detection device,
It may be any one that sends a signal when the resin-impregnated fiber hangs down. For example, a photoelectric switch, a proximity switch, an ultrasonic sensor, a load cell, a cantilever, or the like can be used.

In the method of the present invention, the dripping control device includes a fiber which receives a signal from the detection device and whose dripping is to be controlled from above or below or from the left and right, and the fiber is placed in a direction orthogonal to the passing direction. The tension is applied to the fiber by pulling, and as a result, the resin-impregnated fiber is supplied to the core die via the fiber pulling device in a state with no sag or almost no sag.

[0010]

In the method for producing the fiber-reinforced resin laminate of the present invention, the fiber before being impregnated with the curable resin is passed through the dripping control device, and the dripping of the resin-impregnated fiber is detected by the detection device,
A resin impregnated fiber is supplied to the core type without sagging or with almost no sag by operating the sag control device in response to a signal from the detection device, and the resin impregnated fiber Since dripping is detected by a detection device, unlike the conventional method, a tension roll that directly contacts the resin-impregnated fiber is not used, and as in the conventional method, fluff or breakage may occur in the fiber. In addition, a fiber-reinforced resin laminate having excellent quality can be manufactured with high productivity.

[0011]

Embodiments of the present invention will now be described with reference to the drawings. [Example 1] FIG. 1 is a schematic explanatory view showing one embodiment of a method for producing a fiber-reinforced resin laminate of the present invention. First, an apparatus and materials used in the method for producing the fiber-reinforced resin laminate of the present invention will be described.

In FIG. 1, 1 is a glass fiber fed from the bobbin 11, and the glass fiber 1 is a count 2230.
It is a bundle of 10 g / km. 2 is a sag control device, 3 is a tension adjusting device, 4 is a curable resin impregnation device, and the surface of the impregnating roll 43 is covered with the glass fiber 1 in an impregnation tank 42 in which an unsaturated polyester resin is contained as the curable resin 41. Glass fiber 1 by passing
The curable resin 41 is impregnated into the resin-impregnated fiber 14.

Reference numeral 5 is a sag detecting device comprising a photoelectric tube device, and 6
Is a feed eye which is a fiber delivery device, and the resin-impregnated fiber 14 is supplied from the feed eye 6 to the bend pipe molding core 7 and wound around the core mold 7 to produce a desired fiber-reinforced resin laminate. It is supposed to be done.

From the curable resin impregnation device 4 to the feed eye 6
The resin-impregnated fiber 14 supplied to the
2 and the feed eye 6, the drooping resin-impregnated fiber 14 blocks the beam emitted from one photoelectric tube 51 of the photoelectric tube device 5 to the other photoelectric tube 52 as shown in FIG. It is adapted to send a signal to the dripping control device 2 when activated. In this example, the drooping detection device 5 formed of a photoelectric tube device is arranged between the resin impregnation device 4 and the feed eye 6, but in some cases, the drooping detection device may be provided between the feed eye 6 and the core die 7. You may arrange in between.

As shown in the enlarged view of FIG. 3, the sagging control device 2 has a sandwiching rod 2 which is moved up and down by the operation of an upper cylinder 21.
11 and a sandwiching plate 221 that moves up and down by the operation of the lower cylinder 22 is provided. The fiber 1 passes between the sandwiching rod 211 and the sandwiching plate 221 via the front roll 23, and passes through the rear roll 23 to the next. The tension adjusting device 3 of FIG. Here, when the resin-impregnated fiber 14 hangs down and the photoelectric switch 5 operates to send a signal to the dripping control device 2, the upper cylinder 21 operates to lower the sandwiching rod 211, and as shown in an enlarged view in FIG. , The fiber 1 and the rod 2
11 and the sandwiching plate 221 while sandwiching the sandwiching rod 211.
The sandwich plate 221 descends to apply tension to the fiber 1.

In the tension adjusting device 3, as shown in an enlarged view in FIG. 3, a large number of guide rods 31, 3 provided in a zigzag shape.
Guide roller 3 provided at one end of the swing rod 32
Guide rolls 36 provided on the arms 3, 34 and the arm 35 are provided. The fiber 1 from the dripping control device 2 passes through the guide rods 33, 34 of the swing rod 32 via the multiple guide rods 31, 31, ... Of the tension adjusting device 3, and then the guide roll 36 of the arm 35. After the tension of the fiber 1 is adjusted via
It is designed to be sent to the next resin impregnation tank 4. The other end of the swing rod 32 is pivotally attached to the operating rod 322 of the cylinder 321 so as to give resistance to the swing of the swing rod 32.

Next, an embodiment for producing a resin-made bend pipe having a diameter of 150 mm, which is fiber-reinforced by the method of the present invention, using the above apparatus will be described. The glass fiber 1 delivered from the bobbin 11 passes between the sandwiching rod 211 and the sandwiching plate 221 of the sagging control device 2 and reaches the tension adjusting device 3.
After passing through the guide rolls 33 and 34 of the swing rod 32 via a large number of guide rods 31, 31, ..., After adjusting the tension of the fiber 1 via the guide roll 36 of the arm 35, The resin-impregnated fiber 4 is sent to the resin impregnation tank 4 and impregnated with the cured resin 41 to form the resin-impregnated fiber 14.

Next, the resin-impregnated fiber 14 is transferred to the photoelectric tube device 5
And is wound around the core die 7 from the feed eye 6 and
After the curable resin is cured at a curing temperature of 130 ° C. for 2 hours, it is released from the core mold 7 to manufacture a desired fiber-reinforced resin bend pipe. The result of the internal pressure test of the fiber-reinforced resin bend pipe thus produced was that it was able to sufficiently clear 40 kg / cm ² . In these moldings, a soft polyester layer was formed on the inner surface of the bend pipe so that weeping did not occur. The molding time was 10 minutes, which was able to be shortened to 1/3 as compared with the hand-up method, and it was also able to be shortened to 1/2 that when the sagging control device for resin-impregnated fibers was not used.

Example 2 Using the same apparatus as in Example 1, the curable resin was cured at a curing temperature of 60 ° C. for 1.5 hours to form a 90 ° bend pipe having a bore diameter of 150. Molding time is 20 minutes, which is about 1/2 that of the hand-up method.
In addition, it was possible to shorten the length to about 70% as compared with the case where the dripping control device for the resin-impregnated fiber is not used.

FIG. 5 is a front view showing another example of the drooping control device. In the sagging control device shown in FIG. 5, the motor 22a is used for lowering the upper sandwiching plate 21a instead of using the cylinder as shown in FIGS. That is, when the signal from the detection device is received, the motor 22
a rotates, the rotation of the motor 22a is transmitted to the rotary shaft 24a by the belt 23a, and the rotation of the rotary shaft 24a causes the lowering of the upper lift plate 25a having the female screw 251 which is screwed into the male screw 241 of the rotary shaft 24a. The upper sandwiching plate 21a attached to the elevating plate 25a descends, and while sandwiching the fiber with the lower sandwiching plate 28a, it descends to apply tension to the fiber. The lower sandwich plate 2
8a is attached to a lower elevating plate 26a, and the lower elevating plate 26a is supported by a cylinder 27a.

[0021]

In the method for producing a fiber-reinforced resin laminate of the present invention, the fiber before being impregnated with the curable resin is passed through the dripping control device, and then the dripping of the resin-impregnated fiber is detected by the detection device and detected. A dripping control device is operated by a signal from the device to supply the resin-impregnated fiber to the core die without dripping or with almost no dripping via the fiber deriving device. Does not use tension rolls that come into direct contact with the resin-impregnated fiber, unlike the conventional method, because it is detected by a detection device, and unlike the conventional method, there is no fluff or break in the fiber. Thus, a fiber-reinforced resin laminate having excellent quality can be manufactured with high productivity.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of a method of the present invention.

FIG. 2 is an enlarged perspective view of the detection device shown in FIG.

FIG. 3 is an enlarged front view of the sag control device and the tension adjusting device shown in FIG.

FIG. 4 is a perspective view showing a main part of the sag control device shown in FIG.

FIG. 5 is a front view showing another example of the sag control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 fiber 11 bobbin 14 resin impregnated fiber 2, 2a sag control device 3 tension adjusting device 4 resin impregnation device 41 curable resin 42 impregnation tank 43 impregnation roll 5 photocell device 6 fiber derivation device 7 core type

Claims (1)

[Claims] 1. A method for producing a fiber-reinforced resin laminate in which resin-impregnated fibers obtained by impregnating fibers with a curable resin are wound around a core die via a fiber delivery device and cured, before impregnating the curable resin. The fiber is passed through the dripping control device, and then the dripping of the resin-impregnated fiber is detected by the detection device, and the dripping control device is operated by a signal from the detection device to cause the resin-impregnated fiber to hang down through the fiber deriving device. A method for producing a fiber-reinforced resin laminate, which comprises supplying to a core mold in a state in which there is no or almost no state.