JP2003276096A - Frp molding and its production method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide thick FRP moldings eliminating bandage effects and interlayer separation, and its production method. <P>SOLUTION: In the production method for the FRP moldings to be formed by winding a fiber bundle containing resin around a mandrel, a first fiber bundle 110 to be impregnated with resin by passing through a resin tank 120 and a second fiber bundle 111 not passing through the resin tank 120 are doubled through a nozzle 102 to be made as a third fiber bundle 112, which is wound around the mandrel 104. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an FRP molded product and a method for producing the same.

[0002]

2. Description of the Related Art A flywheel is an energy storage body that stores energy as kinetic energy of a rotating body. In recent years, energy storage using a flywheel has attracted attention as a new type of power storage device because of its high energy storage density, excellent responsiveness to energy demand, and good conversion efficiency into electricity. . Here, in order to apply the flywheel as an energy storage body, it becomes a problem how much energy can be stored in the flywheel.

If the moment of inertia of the flywheel rotating at an angular velocity ω is I, the amount of energy E stored in the flywheel is proportional to Iω ² . That is, a flywheel having a large inertia moment I and capable of increasing the angular velocity ω can store a large amount of energy E.

However, since the upper limit of the angular velocity ω is proportional to the specific strength (= tensile strength / density) derived from the material of the flywheel, the angular velocity ω cannot be increased unnecessarily to increase the energy amount E. That is, since the flywheel is subjected to a centrifugal force associated with the rotational movement, the flywheel is deformed when the centrifugal force that increases with an increase in the angular velocity ω becomes equal to or higher than the tensile strength of the flywheel material.

On the other hand, it is possible to use steel or the like having a large moment of inertia I as a material for the flywheel to increase the energy amount E. However, since the flywheel made of steel currently used has a small specific strength, the angular velocity ω cannot be increased, and as a result, sufficient stored energy cannot be obtained.

Therefore, in recent years, a reinforced fiber plastic (hereinafter referred to as "FRP") having a large specific strength has been attracting attention and is being developed as a material for a flywheel. This F
RP is a plastic whose mechanical strength is remarkably improved by impregnating a reinforcing material such as glass fiber with a matrix resin. Compared with a metal-based material such as steel, RP has a specific strength of 4 to 8 times and a specific elasticity. It is a very promising material as a flywheel material because it has characteristics of 2 to 4 times and theoretical energy density of 3 to 8 times.

However, the tensile strength of FRP has anisotropy, and there is a problem that the tensile strength between fibers is only about 1/20 of that of the reinforcing material in the fiber axis direction. . For this reason, filament winding (hereinafter "FW") is used for molding flywheels using FRP.
Method) is generally used, and it is possible to increase the tensile strength between fibers by this method. The FW method is a method of integrally molding a spherical or cylindrical FRP by impregnating a glass fiber or the like serving as a reinforcing material with a resin and then continuously winding and laminating the glass fiber around a core type called a mandrel. Is.

FIG. 11 is a schematic external view of a conventional FRP molding apparatus using the FW method. Hereinafter, FIG. 11 will be described. The fibers used for FRP are very thin (7-1
0 μm), generally single fibers are collected and used as a fiber bundle for winding. The roving 1101 is obtained by winding the fiber bundle 1110 into a cylindrical shape. The fiber bundle 1110 is supplied from the roving 1101 and the mandrel 1104 fixed to the support rod 1106 is rotated at a constant winding speed V11 to wind the fiber bundle 1110 around the mandrel 1104. At this time, instead of simply winding the fiber bundle 1110 around the mandrel 1104, the fiber bundle 1110 impregnated with the resin is passed through the resin tank 1120 before winding.
The mandrel 1104 is wound around the mandrel 1104 while controlling the winding form described below by the 102. The nozzle 1102 moves from the right side to the left side of the nozzle rail 1103 in the figure to move the fiber bundle 1 from the right end to the left end of the mandrel 1104.
After winding 110, the fiber bundle 111 is moved from the left end to the right end of the mandrel 1104 by moving from left to right.
Wrap 0. By repeating this operation, FRP
Is molded.

FIG. 12 is a winding form diagram showing an example of the winding form of the fiber around the mandrel by the FW method. There are various winding forms as shown in the drawing,
The winding form is selected according to the physical properties required for the purpose of the molded FRP. For example, compared to the case where all winding steps for molding FRP are performed in the same winding form,
The strength against bending and twisting becomes stronger when a plurality of winding forms are alternately performed. The winding form is changed by controlling the moving speed of the nozzle 1102 that moves left and right along the nozzle rail 1103. The winding form shown in FIG. 11 is the helical type winding form of FIG.

[0010]

However, when a thick FRP is formed by the FW method, the wound fiber inside the cylindrical FRP is loosened and the layer is separated from the resin. However, there is a limit to the degree of wall thickness that can be molded. On the other hand, a multi-ring method has been proposed in which a plurality of donut-shaped FRP rings of different sizes are concentrically stacked to form a thick FRP as a whole, but the number of manufacturing steps increases and the cost increases. It leads to increase. Therefore, there has been a demand for a method capable of molding a thick FRP without using the multi-ring method.

The present invention has been made in view of the above circumstances, and when molding a thick FRP, it is possible to prevent a bandage effect and delamination from occurring, and a method of molding the FRP and the bandage effect and the interlayer. It is intended to provide a thick FRP in which peeling is eliminated.

[0012]

[Means for Solving the Problems] First to solve the above problems
The method for manufacturing an FRP molded article according to the invention of 1) is an FR for molding by winding a fiber bundle containing a resin around a mandrel.
A method for producing a P-molded article, which comprises winding a fiber bundle impregnated with a resin and a fiber bundle not impregnated with a resin, in the method for producing a P-molded article. Here, the fiber bundle is a bundle of single fibers, but may be single fibers. The same applies to any of the second to tenth inventions described below.

The method for producing an FRP molded article according to the second invention is characterized in that the fiber bundle obtained by combining the resin-impregnated fiber bundle and the resin-unimpregnated fiber bundle is wound. To do.

The method for producing an FRP molded article according to the third invention is characterized in that a fiber bundle having a resin-impregnated portion and a resin-unimpregnated portion alternately is wound. Here, the timing of switching the portion impregnated with the resin and the portion not impregnated with the resin may be such that they are alternately wound, and is not particularly limited. For example, winding from one end of the mandrel to the other end is one winding unit, and the portion impregnated with the resin and the portion not impregnated may be alternately switched for each winding unit, or a plurality of windings may be used. You may switch for every unit.

The method for producing an FRP molded product according to the fourth aspect of the invention is characterized in that when the fiber bundle is wound around the mandrel, the amount of resin impregnated in the fiber bundle is gradually reduced. Here, the timing for reducing the amount of resin is not particularly limited as long as it is gradually reduced between the winding of the inner portion of the FRP ring and the winding of the outer portion. For example, the amount of resin may be changed slightly for each one winding unit, or may be decreased for each winding unit.

Further, a method of manufacturing an FRP molded article according to the fifth invention is the FRP molded article according to any one of the first to third inventions.
The method for producing a molded article is characterized in that the amount of resin impregnated into the fiber bundle is gradually reduced. That is, in the first to third inventions, a resin-impregnated fiber bundle and a resin-impregnated fiber bundle, or a fiber bundle having alternating resin-impregnated and non-impregnated portions are wound. The amount of resin contained in the impregnated fiber bundle (or part) is gradually reduced. The timing to reduce the number is the same as the timing described in the fourth invention.

Further, a method of manufacturing an FRP molded article according to the sixth invention is the FRP according to any one of the first to third inventions.
A method of manufacturing a molded article is characterized in that a plurality of winding forms are used together. The timing of switching the plurality of winding modes is the same as the timing described in the fourth aspect of the invention.

A method for manufacturing an FRP molded product according to a seventh invention is the same as the method for manufacturing an FRP molded product according to the fifth invention, wherein the method of impregnating the fiber bundle with the resin passes through the resin at a constant distance. A method of impregnating the resin by reducing the amount of the resin to be impregnated is a method of reducing the resin amount by shortening the passage distance of the fiber bundle in the resin or increasing the winding speed of the fiber bundle. Is characterized in that.

The method for manufacturing an FRP molded product according to the eighth invention is the method for manufacturing an FRP molded product according to the sixth invention, wherein the winding form is parallel winding, helical winding, level winding, or polar winding. It is characterized in that it is one of the winding forms selected from the group.

A method for producing an FRP molded article according to a ninth aspect of the present invention is the method for producing an FRP molded article according to the first or second aspect of the present invention, wherein the resin-impregnated fiber bundle is not impregnated with resin. It is characterized in that the amount of resin contained in the entire fiber bundle to be wound is adjusted by changing the amount.

The method for producing an FRP molded article according to the tenth invention is the method for producing an FRP molded article according to the second invention, wherein a fiber bundle not impregnated with resin is arranged around the fiber bundle impregnated with resin. Then, the fiber bundle obtained by combining the yarns is wound.

The FRP molded product according to the eleventh invention is an FRP molded product molded by the method for manufacturing an FRP molded product according to the above invention. The FRP molded product according to the twelfth invention is an FRP molded product characterized in that the FRP molded product is especially a flywheel.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

[Embodiment 1] FIG. 1 is a schematic external view of an FRP molding apparatus for carrying out the FW method according to Embodiment 1 of the present invention. Hereinafter, the FW method according to the first embodiment will be described with reference to FIG. The roving 101 is formed by winding a fiber bundle into a cylindrical shape. The mandrel 104 fixed to the support rod 106 while supplying the fiber bundle from the roving 101
The fiber bundle is rotated by rotating the mandrel 10
Wrap around 4. At this time, the fiber bundle is not wound around the mandrel 104 but wound around as follows.

That is, in Example 1, the first fiber bundle 11 impregnated with the resin by passing through the resin tank 120.
No. 0 and the second fiber bundle 111 that does not pass through the resin tank 120 were combined by the nozzle 102 to form a third fiber bundle 112, and the third fiber bundle 112 was wound around the mandrel 104 in a helical type winding mode. Accordingly, by adjusting the amount of the second fiber bundle 111 that does not contain resin with respect to the first fiber bundle 110, the amount of resin contained in the third fiber bundle 112 when wound around the mandrel 104 can be controlled. Further, all the winding steps were performed with the rotation speed of the mandrel 104, that is, the winding speed V1 being a constant speed.

FIG. 2 is a view showing the mechanism of the nozzle according to the first embodiment. 6A is a schematic view of the inside of the nozzle, FIG. 6B is a schematic view of the relationship between the roller and the fiber bundle in FIG. 3A, and FIG. 6C is a portion A of FIG. FIG. 3 is a cross-sectional view of the fiber as viewed from the fiber axis direction. As shown in these figures, the nozzle 20
2 guides the second fiber bundle 211 by means of the A-part roller 215 and the B-part roller 216 provided inside, and combines the first fiber bundle 210 at the B part with the third fiber bundle 2
12 is set.

FIGS. 5A and 5B show an FRP ring formed on the outer surface of the mandrel 104 when the third fiber bundle 112 including the resin-impregnated first fiber bundle 110 is wound around the mandrel 104. From the time of winding the inner part (the part close to the surface of the mandrel 104) to the outer part (the part far from the surface of the mandrel 104)
3 is a graph showing changes in the amount of resin impregnated in the first fiber bundle until the time of winding. In Example 1, since the winding speed V1 is constant, the time for the first fiber bundle 110 to pass through the resin tank 120 is constant, and the relationship of the resin amounts shown in FIG. That is, regardless of the inside or outside, the same amount of resin is impregnated into the first fiber bundle and wound.

As described above, as a result of molding the FRP by the molding method according to Example 1 described above, it was possible to obtain a thick FRP in which the bandaging effect and delamination were eliminated. This is considered to be due to the following reasons.

FIG. 6 is a cross-sectional photograph of the FRP ring,
(A) is a conventional method, (b) is the FRP ring molded by the method of Example 1. It can be seen from FIG. 4A that extra resin is squeezed out of the FRP ring by the conventional method. That is, in the conventional molding method, the fiber bundle 1
Since a relatively large amount of resin tended to adhere to 110 (FIG. 11), the excess resin wrapped around the mandrel 1104 near the surface was removed from the mandrel 1104.
It was tightened when the part far from the surface of the FRP ring was wound, and it protruded to the outside of the FRP ring. It is considered that, because of this, the amount of resin inside the FRP ring decreased, and the bandaging effect and delamination occurred.

On the other hand, FIG. 6 (b) shows that there is no protrusion of the resin, and the resin is molded from the inside to the outside of the ring with a uniform layer of fibers and resin. this is,
This is because it is possible to control the resin amount that the first fiber bundle 110 is impregnated in a relatively large amount into the second fiber bundle 111 so that the third fiber bundle 112 as a whole has an appropriate resin amount. It is considered that this can prevent the resin from squeezing out and the occurrence of the bandaging effect and the like.

[Embodiment 2] FIG. 3 is a schematic external view of an FRP molding apparatus for carrying out the FW method according to Embodiment 2 of the present invention. FRP for carrying out the FW method according to Example 1 shown in FIG.
The difference from the molding device is that the resin tank 320 of the first fiber bundle 310 is used.
That is, a movable roller 316 is provided for changing the time for passing through. That is, the orbit of the first fiber bundle 310 passing through the resin tank 320 is changed by the movable roller 316 (see “Orbit of the first fiber bundle after movement” 313), and the passage time in the resin tank 320 is changed,
The amount of resin with which the first fiber bundle 310 is impregnated can be controlled.

The FW method according to the second embodiment will be described in detail. The first fiber bundle 310 and the second fiber bundle 311 are connected to the nozzle 3.
The yarn is mixed with 02 to form the third fiber bundle 312 and the mandrel 304.
When the nozzle 302 is wound around the mandrel 304, the movable roller 316 is moved and the amount of resin impregnated into the first fiber bundle 310 is gradually increased every time the nozzle 302 finishes winding the right end to the left end or the left end to the right end of the mandrel 304. To be less. The winding form and the winding speed V3 were the same as in Example 1, and all the winding steps were performed with the helical type and the speed V3 being constant.

In the second embodiment, the time for the first fiber bundle 310 to pass through the resin tank 320 is changed, and the amount of resin impregnated in the first fiber bundle 310 is reduced as the winding process progresses. The relationship of the resin amounts shown in (b) is established.
That is, the third fiber bundle having the first fiber bundle impregnated with a small amount of resin is wound toward the outside of the FRP ring.

As described above, as a result of molding the FRP by the molding method according to Example 2 described above, it was possible to obtain the FRP having a wall thickness in which the bandaging effect and the delamination were eliminated. This is considered to be due to the following reasons.

That is, a relatively large amount of resin contained in the third fiber bundle 312 wound inside the FRP ring is replenished in the third fiber bundle 312 having a relatively small amount of resin outside as the winding process progresses. As a result, it was considered that the FRP ring could be controlled to have an appropriate amount of resin as a whole, so that the resin was prevented from squeezing out and the bandage effect and the like were prevented. In addition, Example 2
Also for the FRP ring molded by the method of FIG.
The same observation result as in Example 1 shown in (b) was obtained.

[Embodiment 3] The FRP molding apparatus for carrying out the FW method according to Embodiment 3 has the same apparatus configuration as the FRP molding apparatus shown in FIG. Therefore, the FW method according to the third embodiment will be described with reference to FIG. In the third embodiment, when the first fiber bundle 110 that passes through the resin tank 120 and the second fiber bundle 111 that does not pass through are mixed by the nozzle 102 to form the third fiber bundle 112 around the mandrel 104, the nozzle 102 Each time the winding of the mandrel 104 in one direction, that is, the right end to the left end or the left end to the right end of the mandrel 104 is completed, the winding speed V1 is gradually increased to gradually reduce the amount of resin impregnated in the first fiber bundle 110. . The winding form was the same helical type winding form as in the first embodiment.

In the third embodiment, the amount of resin impregnated into the first fiber bundle 110 is increased by increasing the winding speed V1 as the winding process progresses and shortening the time for the first fiber bundle 110 to pass through the resin tank 120. Therefore, the relationship of the resin amounts shown in FIG. That is, FR
The third fiber bundle having the first fiber bundle 110 impregnated with a small amount of resin is wound around the outside of the P ring.

As described above, as a result of molding the FRP by the molding method according to the third embodiment described above, it was possible to obtain a thick FRP in which the bandaging effect and delamination were eliminated. The reason for this is the same as the reason described in the second embodiment. The FRP ring molded by the method of Example 3 is also shown in FIG.
The same observation result as in Example 1 shown in (b) was obtained.

Next, Examples 4 to 6 will be described. Example 4 is Example 1, Example 5 is Example 2, and Example 6 is
Is a FW method based on the third embodiment in which only the nozzle portion is changed. That is, instead of the nozzle 202 having the mechanism shown in FIG. 2 used in Examples 1 to 3,
In Examples 4 to 6, the nozzle having the mechanism shown in FIG.

FIG. 4 is a diagram showing the mechanism of a nozzle used in the FW method according to Examples 4 to 6. The same figure (a)
2C is a diagram corresponding to FIG. 2C, and is a cross-sectional view of a portion A (see FIG. 2A) of the nozzles according to Examples 4 to 6 as seen from the fiber axis direction. Six A-section rollers 415 that guide the second fiber bundle 411 are installed around the first fiber bundle 410 in the nozzles according to Examples 4 to 6. This first fiber bundle 4
Six second fiber bundles 411 arranged around 10 are combined by a B-section roller (not shown) (see FIG. 2). FIG. 11B is a cross-sectional view of the third fiber bundle 412 combined by the nozzles according to Examples 4 to 6. As shown in the figure, the third fiber bundle 412 is formed by combining the first fiber bundle 410 and the six second fiber bundles 411 around the first fiber bundle 410.

Hereinafter, Examples 4 to 6 will be described in detail. [Fourth Embodiment] Since the FW method according to the fourth embodiment is based on the first embodiment, the fourth embodiment will be described with reference to FIG. As described above, in the FW method according to the fourth embodiment, the nozzle 10
As No. 2, a nozzle having the mechanism shown in FIG. That is, in Example 4, the first resin impregnated first
The fiber bundle 110 and six second fiber bundles 111 not impregnated with resin (only two are shown in FIG. 1) are combined by the nozzle 102, and the first fiber bundle 110 and the six fibers around it are combined. The third fiber bundle 112 composed of the second fiber bundle 111 and the third fiber bundle 112
The fiber bundle 112 was wrapped around the mandrel 104. The other conditions were the same as in Example 1.

In Example 4, since the winding speed V1 is constant as in Example 1, the relationship between the amount of resin impregnated in the first fiber bundle 110 and the progress of the winding step is shown in FIG.
The relationship is as shown in (a). That is, the first fiber bundle is impregnated with the same amount of resin and wound regardless of the inside or outside of the FRP ring.

As described above, as a result of molding the FRP by the molding method according to the fourth embodiment, it was possible to obtain a thick FRP in which the bandaging effect and delamination were eliminated. The reason for this is the same as the reason described in the first embodiment. The FRP ring molded by the method of Example 4 is also shown in FIG.
The same observation result as in Example 1 shown in (b) was obtained.

[Embodiment 5 and 6] F according to Embodiment 5 or 6
The W method, except for the use of a nozzle having the mechanism shown in FIG.
It carried out on the conditions similar to Example 2 or 3, respectively. In Example 5 or 6, the amount of resin impregnated in the first fiber bundle is reduced as the winding process progresses due to the movement of the operating roller or the change in the winding speed.
The relationship of the resin amounts shown in (b) is established. That is, FRP
The third fiber bundle having the first fiber bundle impregnated with a smaller amount of resin is wound around the outside of the ring.

As described above, as a result of molding the FRP by the molding method according to Examples 5 and 6, it was possible to obtain a thick FRP in which the bandaging effect and delamination were eliminated. The reason for this is the same as the reason described in the second or third embodiment. In addition, F molded by the method of Examples 5 and 6
Also for the RP ring, the same observation result as in Example 1 shown in FIG. 6B was obtained.

[Embodiment 7] FIG. 7 is a schematic external view of an FRP molding apparatus for carrying out the FW method according to Embodiment 7 of the present invention. Hereinafter, the FW method according to the seventh embodiment will be described with reference to FIG. The roving 701 is formed by winding a fiber bundle 710 into a cylindrical shape. The fiber bundle 710 is supplied from the roving 701 and the mandrel 704 fixed to the support rod 706 is rotated to wind the fiber bundle 710 around the mandrel 704. At this time, the fiber bundle 710 is not simply wound around the mandrel 704, but is wound as follows.

In the FRP molding apparatus shown in FIG. 7, the resin tank 7
20 moves up and down (see “Movement of Resin Tank” 722), and the fiber bundle 7 is moved in the resin tank 721 after the movement.
10 does not pass. That is, in the seventh embodiment, when the fiber bundle 710 is wound around the mandrel 704, the resin tank 720 is moved up and down at regular intervals, and
Fiber bundles 710 that pass 0 and fiber bundles 71 that do not pass
0 windings were alternated. In the seventh embodiment, the nozzle 702 moves the resin tank 720 up and down in one direction of the mandrel 704, that is, the mandrel 704.
The right end to the left end or the left end to the right end is moved up and down each time winding is completed. Further, all the winding steps were performed with only the helical type winding form as the winding form and the rotation speed of the mandrel 104, that is, the winding speed V1 was constant.

FIGS. 5C and 5D show the mandrel 704 when the fiber bundle 710 is wound around the mandrel 704.
To the fiber bundle 710 from when the inner part (the part close to the surface of the mandrel 104) of the FRP ring molded on the outer surface of the to is wound to the outer part (the part far from the surface of the mandrel 104). 6 is a graph showing changes in the amount of resin impregnated. In the seventh embodiment, the winding speed V7 is kept constant, and the fiber bundles 710 that pass through the resin tank 720 and the fiber bundles 710 that do not pass through are alternately wound. Therefore, the relationship of the resin amounts shown in FIG. That is, regardless of the inner or outer winding, the fiber bundle 710 impregnated with a certain amount of resin and the fiber bundle 710 not impregnated are alternately wound at regular intervals.

As described above, as a result of molding the FRP by the molding method according to Example 7 described above, it was possible to obtain the FRP having a wall thickness in which the bandaging effect and the delamination were eliminated. This is considered to be due to the following reasons.

That is, a relatively large amount of resin contained in the fiber bundle 710 that has passed through the resin tank 720 is converted into the resin tank 720.
As a result of being replenished in the fiber bundle 710 that does not pass through the FRP,
It was considered that the amount of resin could be controlled so that the ring as a whole had an appropriate amount, so that the resin could be prevented from squeezing out and the occurrence of the bandaging effect and the like. The same observation result as in Example 1 shown in FIG. 6B was obtained for the FRP ring molded by the method of Example 7.

[Embodiment 8] FIG. 8 is a schematic external view of an FRP molding apparatus for carrying out the FW method according to Embodiment 8 of the present invention. FRP for carrying out the FW method according to Example 7 shown in FIG.
The difference from the molding device is that a movable roller 816 for changing the time for which the fiber bundle 810 passes through the resin tank 820 is provided. That is, the orbit of the fiber bundle 810 passing through the resin tank 820 is changed by the movable roller 816 (see “Orbit of fiber bundle after movement” 813), and the passage time in the resin tank 820 is changed to change the fiber bundle 820.
The amount of resin to be impregnated in can be controlled.

The FW method according to Example 8 will be described in detail. When the fiber bundle 810 is wound around the mandrel 804, the nozzle 802 winds in one direction of the mandrel 804, that is, from the right end to the left end or the left end to the right end of the mandrel 804. Each time the resin tank 820 is moved up and down,
Fiber bundles 810 that pass 20 and fiber bundles 8 that do not pass
10 are alternately wound and the movable roller 816
Is moved to gradually reduce the amount of resin impregnated in the fiber bundle 810. The winding form and the winding speed V
8 was the same as in Example 7, and all the winding steps were performed with only the helical type configuration and with the speed V8 being a constant speed.

In the eighth embodiment, since the resin tank 820 is moved up and down at regular intervals and the movable roller 816 is further moved, the resin amount shown in FIG. That is, FR
Fiber bundle 81 impregnated with a smaller amount of resin toward the outside of the P ring
0 and the fiber bundle 810 not impregnated with resin are alternately wound at regular intervals.

As described above, as a result of molding the FRP by the molding method according to Example 8 described above, it was possible to obtain a thick FRP in which the bandaging effect and delamination were eliminated. This is considered to be due to the following reasons.

That is, a relatively large amount of resin contained in the fiber bundle 810 that has passed through the resin tank 820 is converted into the resin tank 820.
Is replenished in the fiber bundle 810 that does not pass through
A relatively large amount of resin contained in the fiber bundle 810 wound inside the P-ring is replenished to the outside of the fiber bundle 810 with a relatively small amount of resin as the winding process progresses. It was considered that the resin amount could be controlled so that the resin amount could be controlled so as to prevent the resin from squeezing out and the occurrence of the bandaging effect and the like.
The FRP ring molded by the method of Example 8 also had the same observation result as that of Example 1 shown in FIG.

[Embodiment 9] The FRP molding apparatus for carrying out the FW method according to Embodiment 9 has the same apparatus configuration as the FRP molding apparatus shown in FIG. Therefore, the FW method according to the ninth embodiment will be described with reference to FIG. 7. In Example 9, when winding the fiber bundle 710 around the mandrel 704, the nozzle 702 moves the resin tank 720 up and down by one direction of the mandrel 704, that is, every time the mandrel 704 finishes winding the right end to the left end or the left end to the right end. The fiber bundle 710 that has passed through the tank 720 and the fiber bundle 710 that does not pass through are alternately wound, and the winding speed V7 is gradually increased to gradually reduce the amount of resin impregnated in the fiber bundle 710. The winding form was only the helical type winding form similar to that of the seventh embodiment.

In the ninth embodiment, the resin tank 720 is moved up and down at regular intervals to further increase the winding speed V7.
The relationship of the resin amounts is shown in (d). That is, FRP
Fiber bundle 710 impregnated with a smaller amount of resin toward the outside of the ring
And the fiber bundle 710 not impregnated with resin are alternately wound at regular intervals.

As described above, as a result of molding the FRP by the molding method according to the ninth embodiment, it was possible to obtain a thick FRP in which the bandaging effect and the delamination were eliminated. The reason for this is the same as the reason described in the eighth embodiment. The FRP ring molded by the method of Example 9 is also shown in FIG.
The same observation result as in Example 1 shown in (b) was obtained.

Next, Examples 10 to 12 will be described. Example 10 is Example 7 and Example 11 is Example 8.
Example 12 is based on Example 9 and is a FW method in which only the winding form is changed. That is, in place of the helical type winding form in Examples 7 to 9, in Example 10 to 12, the helical type and parallel type (see FIG. 12) winding forms were alternately performed.

[Embodiment 10] FIG. 9 is a schematic external view of an FRP molding apparatus for carrying out the FW method according to Embodiment 10.
The FW method according to the tenth embodiment will be described with reference to FIG. As described above, in the FW method according to the tenth embodiment, as the winding form, the helical type and the parallel type (see FIG.
2) are alternately wound. That is, in the tenth embodiment, the nozzle 902 moves the resin tank 920 up and down and passes the resin tank 920 up and down every time the nozzle 902 finishes winding the mandrel 904 from the right end to the left end or the left end to the right end. And the fiber bundle 910 which is not passed through are alternately wound, the moving speed of the nozzle 902 is changed, and the winding is performed by the two types of winding modes.

For example, in FIG. 9, when the nozzle 902 winds from the left end to the right end of the mandrel 904, the fiber bundle 910 that has passed through the resin tank 920 is moved at a relatively low speed to perform parallel type winding. To do. Next, when winding from the right end to the left end, helical type winding is performed by performing the parallel type winding and moving the nozzle 902 at a relatively high speed to move the fiber bundle 910 that does not pass through the resin tank 920.

In Example 10, as in Example 7, the winding speed V9 was kept constant, and the fiber bundles 910 that passed through the resin tank 920 and the fiber bundles 910 that did not pass through were alternately wound. Therefore, FIG. 5C is shown. It is related to the amount of resin. That is, regardless of the inner or outer winding, the fiber bundle 710 impregnated with a certain amount of resin and the fiber bundle 710 not impregnated are alternately wound at regular intervals.

As described above, as a result of molding the FRP by the molding method according to the tenth embodiment to be described, it was possible to obtain a thick FRP in which the bandaging effect and the delamination were eliminated. The reason for this is the same as the reason described in the seventh embodiment. Further, in Example 10, since the FRP ring was formed by a plurality of winding forms, the strength against bending and twisting could be improved. The FRP ring molded by the method of Example 10 had the same observation result as that of Example 1 shown in FIG. 6B.

[Embodiment 11] FIG. 10 is a schematic external view of an FRP molding apparatus for carrying out the FW method according to Embodiment 11. The FW method according to the eleventh embodiment will be described with reference to FIG. As described above, the FW method according to Example 11 was performed under the same conditions as in Example 8 except for the winding form. That is, in the eleventh embodiment, the nozzle 1002 has the mandrel 1
In one direction of 004, that is, each time the mandrel 1004 is wound from the right end to the left end or from the left end to the right end, the following three controls are performed. First, the resin tank 1020 was moved up and down, and the fiber bundle 1010 that passed through the resin tank 1020 and the fiber bundle 1010 that did not pass through were alternately wound.
Secondly, the moving speed of the nozzle 1002 was changed, and winding was performed according to the two types of winding modes.
Thirdly, the movable roller 1016 is moved to move the fiber bundle 10
The amount of resin impregnated in 10 was gradually reduced.

In the eleventh embodiment, the resin tanks 102 are arranged at regular intervals.
Since 0 is moved up and down and the movable roller 1016 is further moved, the resin amount relationship shown in FIG. That is, the fiber bundle 1010 impregnated with a smaller amount of resin and the fiber bundle 1010 not impregnated with resin are disposed outside the FRP ring.
And are alternately wound at regular intervals.

As described above, as a result of molding the FRP by the molding method according to the eleventh embodiment, it was possible to obtain a thick FRP in which the bandaging effect and delamination were eliminated. The reason for this is the same as the reason described in the eighth embodiment. Furthermore, in Example 11, since the FRP ring was formed by a plurality of winding forms, the strength against bending and twisting could be improved. The FRP ring molded by the method of Example 11 had the same observation result as that of Example 1 shown in FIG. 6 (b).

[Embodiment 12] Embodiment 12 will be described with reference to FIG.
The FW method according to the present invention will be described. As described above, Example 12
The FW method according to Example 1 was performed under the same conditions as in Example 9 except for the winding form. That is, in Example 12, the nozzle 9
The following three controls are performed each time 02 finishes winding the mandrel 904 in one direction, that is, every time the mandrel 904 is wound from the right end to the left end or from the left end to the right end. First, the resin tank 92
Fiber bundle 910 that has been moved up and down by 0 and passed through a resin tank 920
And the fiber bundle 910 that does not pass through were alternately wound. Secondly, the moving speed of the nozzle 902 was changed, and winding was performed by the two types of winding forms. Thirdly, the winding speed V9 is changed to change the fiber bundle 9
The amount of resin impregnated in 10 was gradually reduced.

In the twelfth embodiment, the resin tanks 920 are arranged at regular intervals.
Up and down, and to change the winding speed V9,
The relationship of the resin amounts shown in FIG. That is, F
Fiber bundle 9 with a smaller amount of resin impregnated toward the outside of the RP ring
10 and the fiber bundle 910 not impregnated with resin are alternately wound at regular intervals.

As described above, as a result of molding the FRP by the molding method according to the twelfth embodiment, it was possible to obtain a thick FRP in which the bandaging effect and delamination were eliminated. The reason for this is the same as the reason described in the ninth embodiment. Furthermore, in Example 12, since the FRP ring was formed by a plurality of winding forms, it was possible to improve the strength against bending and twisting. The FRP ring molded by the method of Example 12 also had the same observation result as that of Example 1 shown in FIG. 6B.

The embodiment of the present invention has been described above.
The invention is not limited to these examples. The present invention is composed of a combination of the five elements listed below. That is, the present invention relates to the first element, "whether or not to wrap a resin-impregnated fiber bundle together with a resin-impregnated fiber bundle," and the second element, "resin-impregnated fiber bundle. The amount of resin is reduced or made constant with the progress of "," the third element, "For resin-impregnated fiber bundles, the resin is always attached or is not impregnated with the resin-impregnated portion. If the fiber bundle that is not impregnated with resin is wound together with the fiber bundle that is impregnated with resin, the fiber bundle that is not impregnated with the resin is a composite yarn. Or whether they are simply combined with each other ", and a fifth element" whether or not a plurality of winding forms are used together when winding the fiber bundle around the mandrel ". Is Align. These elements are independent of each other, and the same effect as the embodiment can be obtained by any combination.

For example, in Example 1, as the first element, "a fiber bundle not impregnated with a resin is wound together with a fiber bundle impregnated with a resin", and as a second element "a fiber bundle impregnated with a resin is wound. The amount of resin is constant with respect to the progress of "," the third element is "always attach resin to the resin-impregnated fiber bundle", and the fourth element is "fiber bundle impregnated with resin and fiber bundle not impregnated with resin". Is simply combined with each other, and the fifth element is "do not combine plural winding forms".

As the resin with which the fiber bundle is impregnated,
Any resin may be used depending on the necessity of the molded product, and for example, a thermoplastic resin, a thermosetting resin, a UV curable resin or the like can be used.

As the fiber bundle, any fiber bundle may be used according to the necessity of the molded product and, for example, glass fiber or the like can be used.

[0074]

INDUSTRIAL APPLICABILITY According to the present invention, in the method for producing an FRP molded product, the resin-impregnated fiber bundle and the resin-unimpregnated fiber bundle are wound around the mandrel either individually or as a combined fiber bundle. As a result, a relatively large amount of the resin contained in the resin-impregnated fiber bundle can be distributed to the resin-impregnated fiber bundle, and the amount of resin can be controlled so that the entire fiber bundle wound around the mandrel has an appropriate amount of resin. It is possible to prevent the resin from squeezing out and prevent the bandage effect and delamination from occurring. Further, since the above problem does not occur, it is possible to manufacture a thick FRP molded article by one-time winding molding, regardless of the multi-ring method.

According to another aspect of the present invention, in a method for manufacturing an FRP molded article, a fiber bundle is impregnated with a resin at regular intervals to form a fiber bundle having alternating resin-impregnated portions and resin-impregnated portions. Wrap around. As a result, a relatively large amount of resin contained in the resin-impregnated fiber bundle is distributed to the resin-impregnated fiber bundle, and the amount of resin is controlled so that the entire fiber bundle wound around the mandrel has an appropriate amount of resin. Therefore, the resin can be prevented from squeezing out, and the bandaging effect and the delamination can be prevented.

Furthermore, the amount of resin impregnated into the fiber bundle, the relative amount of the resin-impregnated fiber bundle to the resin-impregnated fiber bundle, or the amount of resin in the resin-impregnated portion is changed, and the fiber bundle is wound around the mandrel. By adjusting the amount of resin contained in the whole, it is possible to prevent the resin from squeezing out and prevent the bandage effect and the delamination from occurring.

Furthermore, by using a plurality of winding forms together when winding the fiber bundle around the mandrel, a molded product with improved strength against bending and twisting can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic external view of an FRP molding apparatus that carries out an FW method according to a first embodiment.

2A and 2B are views showing a mechanism of a nozzle according to Embodiment 1, where FIG. 2A is a schematic view of the inside of the nozzle, FIG. 2B is a schematic view of FIG. 3A in three dimensions, and FIG. It is sectional drawing which looked at the A section of a) from the fiber axis direction.

FIG. 3 is a schematic external view of an FRP molding apparatus that performs the FW method according to a second embodiment.

4A is a cross-sectional view of a portion A (see FIG. 2A) of a nozzle used in the FW method according to Examples 4 to 6 as viewed from the fiber axis direction, and FIG. It is sectional drawing of the 3rd fiber bundle combined by the said nozzle.

FIG. 5 is a diagram showing the relationship between the amount of resin impregnated in the fiber bundle and the progress of the FRP ring winding step.

6A is a cross-sectional photograph of an FRP ring molded by the conventional method, and FIG. 6B is a cross-sectional photograph of the FRP ring molded by the method of Example 1.

FIG. 7 is a schematic external view of an FRP molding apparatus that performs the FW method according to Example 7.

FIG. 8 is a schematic external view of an FRP molding apparatus that performs the FW method according to Example 8.

FIG. 9 is a schematic external view of an FRP molding apparatus that performs the FW method according to Example 10.

FIG. 10 is a schematic external view of an FRP molding apparatus that performs the FW method according to Example 11.

FIG. 11 is a schematic external view of an FRP molding apparatus that implements a conventional FW method.

FIG. 12 is a winding form diagram showing an example of a winding form of fibers by the FW method.

[Explanation of symbols]

102 nozzles 104 mandrel 110 First fiber bundle 111 Second fiber bundle 112 Third fiber bundle 115 Laura 120 resin tank

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 4F205 AD16 AH04 AH81 HA02 HA23                       HA32 HA37 HA46 HA47 HB01                       HF01 HF05 HF46 HK02 HK19                       HL12

Claims (12)

[Claims] 1. A method for producing an FRP molded article, which comprises molding a fiber bundle containing a resin around a mandrel, wherein a fiber bundle impregnated with a resin and a fiber bundle not impregnated with the resin are wrapped. Method of manufacturing goods. 2. A method for producing an FRP molded article, which comprises molding a resin-containing fiber bundle by winding it around a mandrel, wherein the fiber is obtained by combining a resin-impregnated fiber bundle and a resin-unimpregnated fiber bundle. A method for producing an FRP molded product, which comprises winding a bundle. 3. A method for producing an FRP molded article, which comprises molding a resin-containing fiber bundle around a mandrel, wherein the resin is impregnated into the fiber bundle at regular intervals when the fiber bundle is wrapped around the mandrel. A method for producing an FRP molded article, characterized by alternately winding impregnated portions and portions not impregnated with resin. 4. A method for producing an FRP molded product, which comprises molding a fiber bundle containing a resin around a mandrel, wherein the amount of the resin impregnated into the fiber bundle is gradually reduced when the fiber bundle is wrapped around the mandrel. A method for producing an FRP molded product, which is characterized by the following. 5. The F according to any one of claims 1 to 3.
In the method for producing an RP molded product, when the fiber bundle is wound around a mandrel, the amount of the resin impregnated in the fiber bundle is gradually reduced, and the method for producing an FRP molded product. 6. The F according to any one of claims 1 to 5.
A method for manufacturing an RP molded product, which comprises using a plurality of winding forms together. 7. The method of manufacturing an FRP molded article according to claim 5, wherein the method of impregnating the fiber bundle with the resin is a method of impregnating the resin by passing through the resin at a constant distance, and the resin to be impregnated. How to reduce the amount of
A method for producing an FRP molded article, which is a method of reducing the amount of resin by shortening the passage distance of the fiber bundle through the resin or increasing the winding speed of the fiber bundle. 8. The method for manufacturing an FRP molded product according to claim 6, wherein the winding form is any one selected from the group consisting of parallel winding, helical winding, level winding, and polar winding. Characteristic F
RP molded article manufacturing method. 9. The method for producing an FRP molded article according to claim 1, wherein the amount of the fiber bundle not impregnated with the resin is changed with respect to the fiber bundle impregnated with the resin.
A method for producing an FRP molded article, which comprises adjusting the amount of resin contained in the entire fiber bundle to be wound. 10. The method for producing an FRP molded article according to claim 2, wherein the fiber bundle wound around the mandrel is
A method for producing an FRP molded article, which is a fiber bundle obtained by arranging a fiber bundle not impregnated with a resin around a fiber bundle impregnated with a resin, and mixing the fibers. 11. An FRP molded product molded by the method for manufacturing an FRP molded product according to claim 1. 12. The FRP molded product according to claim 11, wherein the FRP molded product is a flywheel.