JPH08187788A - Method and apparatus for producing circular arc-shaped frp object - Google Patents

Abstract

PURPOSE: To stably produce a circular arc-shaped object reduced in the irregularity of physical properties. CONSTITUTION: An apparatus equipped with a circular arc-shaped fixed mold 10, the circular arc-shaped guide plate 12 provided on the downstream side of the fixed mold 10 with respect to the moving direction of a reinforcing fiber material and the take-over belt 13 provided on the downstream side of the guide plate 12 with respect to the moving direction of the reinforcing fiber material is used and the reinforcing fiber material impregnated with a resin is continuously passed through the fixed mold 10 to be molded and the molded object is taken over by the take-over belt 13 while guided by the guide plate 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc-shaped FRP made of FRP, such as a wheel rim of a bicycle or an automobile, a coil spring, a leaf spring, and a concrete shear reinforcing bar.
A method and apparatus for manufacturing a body.

[0002]

2. Description of the Related Art For example, the rim of a bicycle wheel is
Conventionally, it is mostly made of metal such as aluminum alloy, but in recent years, especially for road racer bicycles and mountain bikes, carbon fiber reinforced plastics made of FRP have been considered for the purpose of reducing the weight. It's coming.

[0003] Such a non-straight, arc-shaped FR
The production of the P-form has hitherto been carried out by, for example, JP-A-58-14731.
By the so-called pull forming method, as described in Japanese Patent Publication No. 9, a resin-impregnated reinforcing fiber material is continuously guided to the surface of a rotary drum, and an arc-shaped fixed mold is pressed against the rotary drum to form the resin. There is. However, in this conventional technique, since the molding die is composed of the rotary drum and the fixed die, the reinforced fiber material is caught in the sliding surface of the rotary drum and the fixed die during molding, and The resin easily oozes out, the orientation of the reinforcing fibers is disturbed, and the obtained FR
There is a problem that it is difficult to stably manufacture an FRP body with few variations in physical properties, because the P body often has voids.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a method and an apparatus capable of stably manufacturing an arc-shaped FRP body having less variation in physical properties. There is.

[0005]

In order to achieve the above object, the present invention is directed to an arc-shaped guide means after a reinforcing fiber material impregnated with a resin is continuously passed through an arc-shaped fixed molding die and molded. Provided is a method of manufacturing an arc-shaped FRP body, which is characterized in that the FRP body is picked up while being guided. Preferably, the covering material is superposed on both sides of the reinforcing fiber material and is passed through a fixed mold. The reinforcing fiber material is preferably shaped into a desired cross-sectional shape and then passed through a fixed molding die. Before the reinforcing fiber material is passed through the fixed mold, the reinforcing fiber material may be further impregnated with resin.

Further, according to the present invention, an arc-shaped fixed molding die through which a reinforcing fiber material impregnated with a resin is continuously passed, and a fixed molding die provided downstream of the fixed molding die in the moving direction of the reinforcing fiber material. An apparatus for manufacturing an arc-shaped FRP body, comprising: an arc-shaped guide means; and an FRP body take-up means provided downstream of the guide means in the moving direction of the reinforcing fiber material. The take-up means also preferably has an arc shape, and it is preferable that the fixed mold, the guide means, and the take-up means are arranged on the same circle. Upstream of the fixed mold with respect to the moving direction of the reinforcing fiber material, a plurality of shaping means for shaping the reinforcing fiber material into a desired cross-sectional shape is preferably provided, for example. Further, it is preferable that a resin impregnating means for impregnating the reinforcing fiber material with a resin is provided upstream of the shaping means. A manifold for further impregnating the reinforcing fiber material with a resin may be provided between the fixed molding die and the shaping means. Further, it is also preferable that the fixed mold comprises an upper mold and a lower mold, and the guide means is constituted as an extended part of the lower mold.

The reinforcing fiber material used in the present invention comprises high-strength, high-modulus reinforcing fiber such as carbon fiber, glass fiber and polyaramid fiber. Of course, a hybrid material in which these are combined can be used. The form may be a strand, or may be a band-like, for example, an aligned body of strands, a woven fabric, a braid, or the like. Reinforcing fiber material
In particular, when it contains reinforcing fibers extending in the direction perpendicular to the length direction or in the direction of ± θ, on both sides of the reinforcing fiber material,
A covering material made of synthetic fibers or the like, for example, a woven fabric or a non-woven fabric made of polyester fibers, is preferably layered because it is possible to prevent the disorder of the arrangement of the reinforcing fibers when passing through the fixed mold. Further, it is also effective for preventing the FRP body from being deformed such as warp or twist.

The resin used in the present invention is a thermosetting resin such as epoxy resin, phenol resin, polyimide resin, vinyl ester resin or unsaturated polyester resin,
It is like a thermoplastic resin such as nylon resin, polyester resin, vinylon resin or polypropylene resin.

The present invention will be described in more detail with reference to the drawings based on one embodiment thereof. In FIG. 1, the reinforcing fiber materials 1 and 1 are continuously drawn out while adjusting the tension from a core (not shown). Similarly, the covering materials 2 and 2 are pulled out, and they are put together by the guide rolls 3 into a laminated body, and then passed through the resin bath 4 to impregnate the reinforcing fiber materials 1 and 1 and the covering materials 2 and 2 with the resin. , While pulling out from the resin bath 4 while guiding with the guide roll 5. If the viscosity of the resin is too high, impregnation becomes difficult and voids are easily generated in the FRP body, and if it is too low, the working environment deteriorates. Therefore, it is preferable to adjust the viscosity to a range of 5 to 50 poises. preferable.

Next, the superposed body is provided with three shaping guides 6,
FRP that wants to obtain the cross-sectional shape of the superposed body through 7 and 8.
Gradually shape the body into a cross-sectional shape. For example, to obtain an FRP body having a U-shaped cross section, the superposed body is first bent slightly by the first shaping guide 6 and then bent a little more by the second shaping guide 7 to form a C-shape. Further, the shaping guide 8 is used to make a U-shape. In this example, three shaping guides are used because it is difficult to shape in a U-shape at once, but one may be used as long as it is shaped into a simple cross-sectional shape, or a flat FR.
It may not be provided in the case of obtaining a P body. of course,
In the case of shaping into a more complicated cross-sectional shape, the number will be further increased. The shaping guide can be configured by, for example, inclining a plurality of rolls and combining them.

The superposed body shaped into a desired cross-sectional shape is then passed through a manifold 9, and the manifold 9 is further impregnated with resin under pressure. The re-impregnation of the resin with the manifold 9 can impregnate a sufficient amount of the resin into the inside of the superposed body, especially when the superposed body is thick, and is effective in reducing the voids of the FRP body, but it is not essential.

An arc-shaped fixed mold 10 is provided continuously with the manifold 9. This fixed mold 10 has a cavity space having the same cross-sectional shape as the FRP body to be obtained, and has the same curvature as the FRP body to be obtained. FIG. 2 shows an example of such a fixed mold,
The fixed molding die 10 comprises an upper die 10a and a lower die 10b, and a cavity space through which the superposed body passes is formed between the upper die 10a and the lower die 10b. On the inlet side of the superposed body in the cavity space, a curved surface processing of about 2 to 10R is performed in order to prevent the superposed body from being caught and to smoothly carry in the resin.
The lower die 10b is extended, and the extended lower die 10 is
A part of b constitutes a guide plate 12 described later. However, it is not essential that the fixed mold 10 is a so-called split mold, and the guide means is the lower mold 10.
It may be configured separately from b. Then, the fixed mold 10 is heated, for example, by a heater embedded therein, and the superposed body that is passed through is heated and molded into an FRP body according to the cross-sectional shape and curvature of the cavity space. That is, the arc-shaped FRP body 11 is obtained from the fixed mold 10. Although the heating temperature of the fixed mold 10 varies depending on the type of resin used, the molding speed (equal to the take-up speed), etc., when an epoxy resin is used as the resin and the molding speed is 0.3 to 2 m / min, 12
It is about 0 to 180 ° C. When a core is combined with a fixed mold, a hollow arc-shaped FRP body can be manufactured.

The arc-shaped FRP body 10 thus obtained is continuously taken up by a take-up belt 13 consisting of a pair of endless belts while being guided by a guide plate 12 having the same curvature. The take-up belt 13 also preferably has the same curvature as the arc-shaped FRP body 10. When the fixed mold 10, the guide plate 12, and the take-up belt 13 have the same curvature and are positioned on the same circle, the deformation of the FRP body and the occurrence of internal cracks are more completely prevented. It is preferable because it is possible.

The arc-shaped FRP body 10 is taken up by the take-up belt 13 and cut into a desired length by the rotary cutter 14 provided downstream thereof. The guide plate 12
Is changed to, for example, a drum, and the arc-shaped FRP body 11 obtained from the fixed mold 10 is cut after being guided along the drum so as to surround the drum a plurality of times and then cut. Arc-shaped FRP like a spring
You can get the body.

[0015]

According to the present invention, an arc-shaped fixed forming die, an arc-shaped guide means provided downstream of the fixed forming die with respect to the moving direction of the reinforcing fiber material, and a moving direction of the reinforcing fiber material. Using an apparatus provided with a FRP body take-up means provided downstream of the guide means, the resin-impregnated reinforced fiber material is continuously passed through a fixed molding die, molded, and then taken up while being guided by the guide means. Japanese Patent Laid-Open No. 58-147319 discloses a conventional technique in which a rotary drum and a fixed die constitute a molding die, and a reinforcing fiber material is caught on a sliding surface between the rotary drum and the fixed die during molding. It is possible to solve the problem that the resin tends to get in and to ooze out from the sliding surface, and it is possible to prevent the orientation of the reinforcing fibers from being disturbed and to prevent the voids from occurring frequently in the obtained FRP body. FRP body with less variation of And so it can be produced.

[Brief description of drawings]

FIG. 1 is a schematic front view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of the fixed mold shown in FIG.

[Explanation of symbols]

 1: Reinforcing fiber material 2: Covering material 3: Guide roll 4: Resin bath 5: Guide roll 6: Molding guide 7: Molding guide 8: Molding guide 9: Manifold 10: Fixed molding mold 10a: Upper mold 10b: Lower mold 11: Arc-shaped FRP body 12: Guide plate (guide means) 13: Take-off belt (FRP body take-up means) 14: Rotary cutter (cutter means)

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Claims (14)

[Claims] 1. An arc-shaped F, characterized in that a reinforced fiber material impregnated with a resin is continuously passed through an arc-shaped fixed molding die, molded, and then guided while being guided by arc-shaped guide means.
Method for manufacturing RP body. 2. The method for manufacturing an arc-shaped FRP body according to claim 1, wherein a covering material is superposed on both sides of the reinforcing fiber material and is passed through a fixed molding die. 3. The method for producing an arc-shaped FRP body according to claim 1, wherein the reinforcing fiber material is shaped into a desired cross-sectional shape and then passed through a fixed molding die. 4. The method for producing an arc-shaped FRP body according to claim 1, wherein the reinforcing fiber material is further impregnated with a resin before the reinforcing fiber material is passed through a fixed mold. 5. An arc-shaped fixed molding die through which a reinforced fiber material impregnated with resin is continuously passed, and an arc-shaped guide provided downstream of the fixed molding die in the moving direction of the reinforced fiber material. An apparatus for manufacturing an arc-shaped FRP body, comprising: an FRP body take-up means provided downstream of the guide means in the moving direction of the reinforcing fiber material. 6. The apparatus for manufacturing an arc-shaped FRP body according to claim 5, wherein the take-up means has an arc shape. 7. The arc-shaped FRP according to claim 6, wherein the fixed mold, the guide means and the take-up means are arranged on the same circle.
Body manufacturing equipment. 8. A molding means for molding the reinforcing fiber material into a desired cross-sectional shape is provided upstream of the fixed molding die in the moving direction of the reinforcing fiber material. This is an arc-shaped FRP body manufacturing device. 9. The apparatus for manufacturing an arc-shaped FRP body according to claim 8, wherein a plurality of shaping means are provided. 10. The manufacture of the arc-shaped FRP body according to claim 8, wherein a resin impregnating means for impregnating the reinforcing fiber material with a resin is provided upstream of the shaping means with respect to the moving direction of the reinforcing fiber material. apparatus. 11. The manufacturing apparatus for an arc-shaped FRP body according to claim 8, wherein a manifold for further impregnating the reinforcing fiber material with a resin is provided between the fixed molding die and the shaping means. 12. The manufacturing apparatus for an arc-shaped FRP body according to claim 5, wherein the fixed mold comprises an upper mold and a lower mold. 13. An apparatus for manufacturing an arc-shaped FRP body according to claim 12, wherein the guide means is formed as an extended part of the lower die. 14. A cutter means is provided downstream of the take-up means with respect to the moving direction of the reinforcing fiber material.
3. An apparatus for manufacturing an arc-shaped FRP body according to any one of 3 above.