JPH08108487A - Manufacture of frp cylindrical body and its device - Google Patents

Abstract

PURPOSE: To provide a filament winding molding method of an FRP cylindrical body and a device therefor wherein a reinforced fiber bundle does not wind around a guide roller. CONSTITUTION: In manufacturing an FRP cylindrical body by winding a reinforced fiber bundle 4 around a mandrel 13, a resin is supplied to the wound reinforced fiber bundle 4 on the mandrel 13 while the reinforced fiber bundle 4 is being wound around the mandrel 13 or after the reinforced fiber bundle 4 is wound.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing an FRP (fiber reinforced plastic) cylinder, and more particularly to a method and an apparatus for manufacturing an FRP cylinder by a filament winding molding method.

[0002]

2. Description of the Related Art A bundle of reinforcing fibers is wound around a mandrel and
A method called a filament winding molding method for manufacturing an RP cylinder is known. In this filament winding molding method, usually, a reinforcing fiber bundle is impregnated with a resin in a resin impregnation bath, and the resin impregnated reinforcing fiber bundle is wound around a rotating mandrel at a predetermined angle. A plurality of guide rollers are provided between the resin-impregnated bath and the mandrel to guide the resin-impregnated reinforcing fiber bundle.

[0003]

However, in such a molding method, since the uncured and non-solidified resin has adhesiveness, when the reinforcing fiber bundle impregnated with the resin is guided by each guide roller, It may be wound around the guide roller. When the wrapping occurs, not only the production has to be interrupted, but also it takes a lot of time and labor to restore the production, and the productivity is greatly reduced.

In view of the above problems, the present invention provides a filament winding molding method for a FRP cylinder and an apparatus therefor, in which the reinforcing fiber bundle is not wound around the guide roller, and the productivity is greatly improved. The purpose is to raise.

[0005]

According to the method for producing an FRP cylinder of the present invention which meets this object, when the reinforcing fiber bundle is wound around the mandrel when the reinforcing fiber bundle is wound around the mandrel to produce the FRP cylinder. Or, after winding, a resin is applied to the wound reinforcing fiber bundle on a mandrel.

As the method of applying the resin to the reinforcing fiber bundle wound around the mandrel, the following various methods can be adopted. For example, a method of applying a resin by dipping a reinforcing fiber bundle wound around a mandrel in a resin in a resin bath, more specifically, a resin bath is provided below the mandrel, and the lower part of the mandrel is placed in the resin in the resin bath. A dipping method can be adopted.

It is also possible to adopt a method in which the reinforcing fiber bundle wound around the mandrel is sprayed with resin from a position separated from the surface of the mandrel by an appropriate distance.

Further, a method of applying a resin by bringing a roller whose surface is coated with a resin into contact with a reinforcing fiber bundle wound around a mandrel can be adopted.

[0009] In these methods, it is preferable that the resin applied to the reinforcing fiber bundle is impregnated into the reinforcing fiber bundle by a squeezing roll and excess resin is squeezed out.

Further, in the apparatus for manufacturing the FRP cylinder according to the present invention, in the apparatus for manufacturing the FRP cylinder by winding the reinforcing fiber bundle around the mandrel, the means for applying the resin to the reinforcing fiber bundle faces the surface of the mandrel. It is characterized by being provided.

As the resin applying means, as described above, the resin bath provided under the mandrel, the resin spraying means arranged to face the surface of the mandrel, the resin spraying means arranged in parallel with the mandrel and pressed against the mandrel surface, An example is a resin coating roll whose position is adjusted so as to form a constant gap with the surface of the mandrel.

[0012]

In the manufacturing method and the manufacturing apparatus of such an FRP cylinder, the resin is not yet applied in the middle of sending the reinforcing fiber bundle to the mandrel, and the reinforcing fiber is not wound until it is wound on the mandrel. Resin is applied to the bundle. Since the reinforcing fiber bundle that is being conveyed toward the mandrel does not contain a resin, it does not have adhesiveness, and winding of the reinforcing fiber bundle around the guide roller due to the adhesiveness does not occur. Therefore, the stable conveying state of the reinforcing fiber bundle is maintained, and the decrease in productivity due to winding is prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the method and apparatus for manufacturing an FRP cylinder of the present invention will be described below with reference to the drawings. 1 and 2 show an F according to an embodiment of the present invention.
The manufacturing apparatus of a RP cylinder is shown. In FIG. 1, 1
Is a bobbin 2 wound with reinforcing fiber yarn (for example, carbon fiber yarn)
It shows a creel stand with many installed. A predetermined number of the reinforcing fiber yarns 3 fed from each bobbin 2 of the creel stand 1 are aligned and made into a reinforcing fiber bundle 4 and sent to a separate roll 5. The reinforcing fiber is not limited to carbon fiber, and for example, glass fiber, aramid fiber or the like can be used, and these can be used together.

In this embodiment, the separate roll 5 comprises a pair of free rotating rolls 6a extending substantially horizontally.
6b and a pair of free rotating rolls 7a, 7b on the downstream side thereof that extend substantially vertically. By the separate roll 5, the reinforcing fiber bundle 4 which is approximately aligned in a predetermined cross-sectional shape is sent to the feed roller 9 via the guide roll 8 which is a free rotating roller.

In this embodiment, the feed roller 9 is a pair of rollers 9a, 9 arranged in the feeding direction of the reinforcing fiber bundle 4.
It consists of b. The pair of rollers 9a and 9b are rotatably supported by the bracket 10, and the bracket 10
Are fixed on a cylinder 12 rotatably supported by a carriage stand 11. After the reinforcing fiber bundle 4 is inserted through the hollow portion 12a of the cylinder 12, the reinforcing fiber bundle 4 is sent onto the mandrel 13 via the pair of feed rollers 9a and 9b. Feed rollers 9a, 9b
Together with the cylinder 12 and the carriage stand 11,
The mandrel 13 is moved in the direction along the rotation axis.

The mandrel 13 is rotationally driven by the mandrel rotation driving means 14 at a predetermined rotational speed. The mandrel rotation driving means 14 is composed of, for example, a motor or a combination of a motor and a speed reducer. The reinforcing fiber bundle 4 is wound around the mandrel 13 at a predetermined angle and a predetermined number of layers.

Below the mandrel 13, a resin bath 16 containing a resin 15 which serves as a matrix resin for FRP is provided. The reinforcing fiber bundle 4 wound around the mandrel 13 is soaked in the resin 15 in the resin bath 16 that the resin 15 is applied to the reinforcing fiber bundle 4.

Further, the rotating direction of the mandrel 13 (see FIG. 2)
A squeeze roll 17 is provided on the downstream side of the resin bath 16 and on the side of the mandrel 13 as viewed in the direction of the arrow). The squeezing roll 17 may be either a member that is pressed toward the surface of the mandrel 13 or a member that maintains a predetermined constant clearance with the surface of the mandrel 13, but in the present embodiment, it is a cylinder device. It is configured to be pressed by 18 with an appropriate pressing force. With this squeezing roll 17, the resin applied to the reinforcing fiber bundle 4 is preferably impregnated into the reinforcing fiber bundle 4,
You can squeeze out an excessive amount of resin.

The matrix resin applied to the reinforcing fiber bundle 4 includes epoxy resin, phenol resin,
A thermosetting resin such as a polyimide resin, a vinyl ester resin or an unsaturated polyester resin is used, but another resin such as a thermoplastic resin such as polyamide, polycarbonate or polyetherimide may be used.

In the embodiment apparatus configured as described above, a plurality of reinforcing fiber threads 3 sent out from the creel stand 1 are aligned and a reinforcing fiber bundle 4 is formed. After passing through the separate roll 5, the reinforcing fiber bundle 4 is wound around the mandrel 13 via the guide roll 8 and the feed rollers 9a and 9b. The resin 15 is applied below the mandrel 13 to the reinforcing fiber bundle 4 wound around the mandrel 13, and the applied resin 15
Is squeezed by the squeezing roll 17, while the excess amount of the resin 15 is squeezed out while being better impregnated in the reinforcing fiber bundle 4.

The resin is not applied to the reinforcing fiber bundle 4 until it is wound around the mandrel 13, so that the guide rolls in the middle, that is, the guide roll 8 and the feed roller 9 are provided.
The reinforcing fiber bundle 4 does not wind around a and 9b due to the adhesiveness of the resin. Therefore, no trouble occurs due to the winding of the reinforcing fiber bundle 4, and a stable desired production state is continued.

FIG. 3 shows an FRP according to another embodiment of the present invention.
The mandrel part of the manufacturing apparatus of a cylinder is shown. In this embodiment, a spray device 21 is provided at a position facing the surface of the mandrel 13, and the resin 22 is applied from the spray device 21 to the reinforcing fiber bundle 4 wound on the mandrel 13. .

Even in such an apparatus, the reinforcing fiber bundle 4
Since the resin 22 is applied on the mandrel 13 to
The wrapping of the reinforcing fiber bundle 4 on the guide roll up to the mandrel 13 is prevented.

FIG. 4 shows a mandrel portion of an FRP cylinder manufacturing apparatus according to still another embodiment of the present invention.
In this embodiment, the applicator roll 31 is provided below the mandrel 13, and the lower part of the applicator roll 31 is immersed in the resin 33 in the resin bath 32. The resin 33 applied to the surface of the applicator roll 31 is
As the applicator roll 31 rotates, the applicator roll 31 is conveyed upward and applied to the reinforcing fiber bundle 4 wound around the mandrel 31.

The applicator roll 31 is the mandrel 1
It may be driven to rotate with the rotation of 3, or may be driven to rotate. In the case of a rotationally driven type, the rotational direction may be either a direction in which the surface of the applicator roll 31 moves in the same direction as the surface of the mandrel 13 or a direction in which the surface moves in the opposite direction. Further, the peripheral speed thereof may be substantially synchronized with the peripheral speed of the mandrel 13,
A peripheral speed difference may be provided between the two.

Further, the applicator roll 31 may be pressed with a certain pressing force toward the surface side of the mandrel 13, and the applicator roll 31 and the surface of the mandrel 13 have a predetermined constant distance. You may keep a clearance. In either type, the applicator roll 31 itself can have a function equivalent to that of the squeezing roll 17 shown in FIGS. 2 and 3, so that the squeezing roll need not be provided. However, in order to complete the resin impregnation and optimize the amount of resin,
A squeeze roll may be provided.

Even in the apparatus of such an embodiment, since the resin 33 is applied to the reinforcing fiber bundle 4 on the mandrel 13 for the first time, the winding of the reinforcing fiber bundle 4 on the guide roll up to the mandrel 13 is prevented. To be prevented.

FIG. 5 shows a modification of the device shown in FIG. In this embodiment, the applicator roll 41
Resin is applied with a brush 42 on top, and applicator roll 4
The resin applied onto the mandrel 13 is applied to the reinforcing fiber bundle 4 wound around the mandrel 13. Thus, the application of the resin onto the applicator roll is not limited to the resin bath as shown in FIG. 4, but any appropriate means can be used. In this embodiment, the applicator roll 41 is
Although it is pressed in the direction of the mandrel 13 by the cylinder device 43, a constant clearance may be maintained between the two as described above.

[0029]

As described above, according to the present invention,
Do not add resin to the reinforcing fiber bundle until reaching the mandrel,
Since the resin is applied to the reinforcing fiber bundle wound on the mandrel for the first time, it is possible to reliably prevent the reinforcing fiber bundle from being wound around the guide roll until reaching the mandrel, and to improve the productivity of the FRP cylinder. You can improve. Therefore, the present invention is extremely useful when applied to the manufacture of FRP propeller shafts and FRP rolls.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an FRP cylinder manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged schematic configuration diagram of a mandrel section of the apparatus of FIG.

FIG. 3 is a schematic configuration diagram of a mandrel portion of an apparatus for manufacturing an FRP cylinder according to another embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a mandrel section of an FRP cylinder manufacturing apparatus according to still another embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of a mandrel portion of an FRP cylinder manufacturing apparatus according to a modification of FIG.

[Explanation of symbols]

 1 Creel Stand 2 Bobbin 3 Reinforcing Fiber Yarn 4 Reinforcing Fiber Bundle 5, 6a, 6b, 7a, 7b Separate Roll 8 Guide Roll 9, 9a, 9b Feed Roller 10 Bracket 11 Carriage Stand 12 Cylinder 12a Hollow 13 Mandrel 14 Mandrel Rotation Drive Means 15, 22, 33 Resin 16, 32 Resin bath 17 Squeeze roll 18, 43 Cylinder device 21 Spray device 31, 41 Applicator roll 42 Brush

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area F16L 9/12 // B29K 105: 08 B29L 23:00

Claims (6)

[Claims] 1. A reinforcing fiber bundle is wrapped around a mandrel to form an F
In manufacturing the RP cylinder, when the reinforcing fiber bundle is wound around the mandrel, or after winding, a resin is applied to the wound reinforcing fiber bundle on the mandrel, a method for manufacturing the FRP cylinder. . 2. The method for producing an FRP cylinder according to claim 1, wherein the reinforcing fiber bundle wound around the mandrel is immersed in the resin in the resin bath to apply the resin. 3. The method for manufacturing an FRP cylinder according to claim 1, wherein the resin is applied to the reinforcing fiber bundle wound around the mandrel by spraying. 4. A reinforcing fiber bundle wound around a mandrel,
The method for manufacturing an FRP cylinder according to claim 1, wherein the resin is applied by bringing a roller whose surface is coated with the resin into contact with the resin. 5. The FRP cylinder according to claim 1, wherein the reinforced fiber bundle is impregnated with the resin imparted to the reinforced fiber bundle by a squeezing roll, and excess resin is squeezed out. Method. 6. A reinforcing fiber bundle is wrapped around a mandrel to form an F
An apparatus for manufacturing an RP cylinder, characterized in that means for applying a resin to a reinforcing fiber bundle is provided so as to face the surface of a mandrel.