JPH03183532A - Manufacture of fiber reinforced composite resin roll and mandrel therefor - Google Patents

Abstract

PURPOSE:To sufficiently ensure the joint strength between a hollow pipe and both end shafts by integrally molding and then fitting metallic sleeves on both ends of a hollow pipe formed with fiber reinforced composite resin, and fixing a metallic rotating shaft on the metallic sleeves. CONSTITUTION:The joint between a fiber reinforced composite resin hollow pipe 2 and metallic sleeves 4 is made at such strength that the both end inner peripheries of the fiber reinforced composite resin hollow pipe 2 come tightly into recessed and projected parts such as knurled work formed on the outer peripheries of the metallic sleeves, thereby being durable even in a larger rotating torque. The fiber reinforced composite resin hollow pipe 2 is formed integrally in a shape of covering the outer periphery of the both ended metallic sleeves 4 in use of resin infiltrated fibers by a filament winding method or a sheet winding method by the use of prepreg. The shaft parts 6 fixed on the inner peripheries of the metallic sleeves 4 are formed integrally on flanges 6a and flanges 6a to be integrally fixed, for example, by pressure- insertion, and have rotation shafts 6b being rotatably supported, for example, by shafts 8. These shafts 6 are formed of a light weight metallic material, for example, aluminum or the like.

Description

[Detailed Description of the Invention] Industrial I! - The present invention relates to a lightweight fiber-reinforced composite resin roll that can be suitably used particularly as a feed roll for thin films, a paper coater roll, etc., and furthermore, the present invention relates to a lightweight fiber-reinforced composite resin roll that can be suitably used as a feed roll for thin films, a paper coater roll, etc. 6, which relates to a method for manufacturing a cutting roll having the following properties.

For example, various synthetic resin films such as 20-30
BACKGROUND ART It is extremely important that feed rolls, paper coater rolls, etc. used in manufacturing thin films such as lims are rotated at high speed and that they start and stop rotation smoothly. When the amount of electricity of the feed roll is large, the inertia of the feed roll becomes large, causing a problem that wrinkles occur in the thin film being transported.

Therefore, such feed rolls are currently manufactured by machining using lightweight metal materials such as aluminum, but the machining is complicated, the manufacturing cost is high, and the mechanical strength is low. There are also problems with this.

As a means to solve the above problem, it has recently been proposed to manufacture such a feed roll using a fiber-reinforced composite resin.

A conventional fiber-reinforced composite resin roll has a structure in which the body of the roll is a hollow tube made of fiber-reinforced composite resin, and metal shafts are integrally arranged at both ends.

At this time, when providing metal shafts at both ends, center the fiber-reinforced composite resin hollow tube, drill holes at both ends, and apply adhesive to the metal shafts in the holes. A method of fixing through the wire is used.

However, in the fiber-reinforced composite resin roll with the above configuration, since the hollow tube and the shaft are fixed with adhesive, there is a gap between the fitting hole formed in the hollow tube and the shaft. There is a slight void due to the adhesive. When the roll is rotated at a high speed, this gap causes play between the hollow tube and the shaft portion after a certain period of time has elapsed, causing a problem in that the rotation accuracy of the roll decreases. If an attempt is made to solve this problem by increasing the fitting area between the shaft portion and the hollow tube and increasing the bonding area, the problem arises that the shaft portion itself becomes large and the air volume of the roll increases significantly. Furthermore, if the gap for the adhesive is too small, problems such as the adhesive not being sufficiently spread over the entire joint surface may occur, resulting in poor adhesion.

In addition, in manufacturing the above fiber reinforced composite resin roll,
Since drilling is required to fit the shaft to both ends of the hollow tube, it not only takes extra processing time and requires the use of a large lathe, but also requires drilling. As a result, the reinforcing fibers in the fiber-reinforced composite resin hollow tube were cut, which caused problems such as lowering the strength of the hollow tube.

Therefore, an object of the present invention is to provide a fiber-reinforced composite resin roll that has a structure that ensures sufficient joint strength between the hollow tube and the shaft portions at both ends, and that meets the desired weight reduction as a whole. With the goal.

Another object of the present invention is to manufacture a fiber-reinforced composite roll that is relatively easy to manufacture, without requiring work such as drilling, which takes time and man-hours, and which necessitates the cutting of reinforcing fibers. An object of the present invention is to provide a method for manufacturing a resin roll and a blank mandrel used for manufacturing the roll.

The above-mentioned objects for solving the problems are achieved by the fiber-reinforced composite resin roll, the manufacturing method thereof, and the roll manufacturing mandrel according to the present invention.

In summary, the present invention includes integrally molding and attaching metal sleeves to both ends of a hollow tube made of fiber-reinforced composite resin, and fixing a metal rotating shaft to the metal sleeves. This is a fiber-reinforced composite resin roll characterized by comprising:

The fiber-reinforced composite resin roll is manufactured by attaching a metal sleeve with an uneven shape on the outer surface to the outer peripheral surface of both ends of a split-type diameter-reducing mandrel. A fiber-reinforced resin layer is formed covering the outer surface of the diameter mandrel and the outer surface of the metal sleeve, and after the fiber-reinforced resin layer is cured, the diameter of the split-type diameter-reduction mandrel is reduced, and the fiber-reinforced resin is It can be suitably manufactured by pulling out the layer and the metal sleeve along the axial direction, and then fixing the metal rotating shaft to the metal sleeve.

Further, in the above manufacturing method, a pair of mandrel segments of the same shape are arranged opposite to each other in one direction, a pair of mandrel segments of the same shape are arranged to face each other in the other direction, and each of the mandrel segments is A core metal rod is arranged inside both ends and fixes each mandrel segment integrally so as to define a continuous outer peripheral surface, and a metal sleeve is arranged on the outer periphery of both ends of each mandrel segment. A split-type diameter-reducing mandrel characterized by having a push ring for holding the mandrel split piece is preferably used.

Next, one embodiment of the fiber-reinforced composite resin roll according to the present invention will be specifically described with reference to the drawings.

Referring to FIG. 1, the fiber-reinforced composite resin roll l according to the present invention includes a fiber-reinforced composite resin hollow tube 2 formed of fiber-reinforced composite resin and having a predetermined length and a predetermined outer diameter; It has a metal sleeve 4 attached to the inner peripheral portion of both ends of the empty tube 2, and a metal shaft part 6 fixed to the sleeve 4.

The outer circumferential portion 4a of the metal sleeve 4 has an uneven shape. The uneven shape can be formed by knurling, and can be, for example, a flat or cross pattern defined in JISB 0951, for example, a flat or cross pattern with a module (m) of 0.5. I can do it. Furthermore, it is similar to the cross-grain knurling according to the JIS standard, but the knurling angle (the angle formed by the cross-grain with respect to the axial direction) is changed from 30 degrees as specified by the JIS to 45 degrees, or it is formed into a convex shape. It is possible to use winter grains with the tops flattened.

Therefore, the fiber-reinforced composite resin hollow tube 2 and the metal sleeve 4
The connection with the fiber-reinforced composite resin hollow tube 2 is able to withstand large rotational torque by tightly inserting the inner periphery of both ends into the concavo-convex shaped part such as knurling formed on the outer periphery of the metal sleeve. They are joined with such strength.

As will be explained in detail later, the fiber-reinforced composite resin hollow tube 2 is integrally formed by covering the outer periphery of the metal sleeve 4 at both ends, and is formed by a filament winding method using resin-impregnated fibers. It can be formed by a sheet winding method using prepreg.

In the fiber-reinforced composite resin hollow tube 2, carbon fiber, glass fiber, or aramid fiber is used as the reinforcing fiber, and thermosetting resin such as epoxy, unsaturated polyester, urethane acrylate, vinyl ester, phenol, or polyurethane is used as the matrix resin. Resin, nylon 6, nylon 6
6. Nylon 12, PBT, PET, polycarbonate, polyacetal, polyphenylene sulfide, polyether ether ketone, polyether sulfide,
Thermoplastic resins such as polyphenylene oxide, noryl, polypropylene, and polyvinyl chloride are preferably used.

Furthermore, additives and colorants for improving heat resistance and weather resistance can also be added.

Further, the shaft portion 6 fixed to the inner periphery of the metal sleeve 4 is formed integrally with a flange portion 6a fixed to the sleeve 4 by, for example, press fitting, and the flange portion 6a,
For example, it has a rotating shaft portion 6b rotatably supported by a bearing 8. The shaft portion 6 can be made of a lightweight metal material, such as aluminum. If the rotating shaft part 6b
If it is desired to increase the strength of the rotary shaft, the flange portion 6a and the rotating shaft portion 6b may be formed as separate parts, with the flange portion 6a made of aluminum and the rotating shaft portion 6b made of steel or the like. is also possible.

Next, an embodiment of the method for manufacturing the fiber-reinforced composite resin roll 1 according to the present invention having the above configuration will be described in more detail with reference to the drawings.

In manufacturing the fiber-reinforced composite resin roll according to the present invention, a split diameter reducing mandrel 10 is used in this embodiment.

The split type diameter reduction mandrel 1o is divided into four parts, as shown in FIGS. 2, 3, and 4, and as can be seen particularly in FIG. A pair of mandrel segments 11 having the same shape and arranged vertically facing each other.
11, and a pair of mandrel divided pieces 13 and 13 having the same shape and arranged opposite to each other in the left-right direction. As shown in FIG. 2, each mandrel segment has large diameter parts 11a and 13a on which the fiber-reinforced composite resin layer is formed, small diameter parts 11b and 13b on which the metal sleeve 4 is attached, and screws. It has threaded portions 11c and 13c at both ends. Each of the mandrel segments is fixed together by core metal rods 15 disposed at both ends.

That is, as can be understood from FIGS. 2 and 3, the inner surface of the end of each mandrel segment 11% 13 is connected to the core rod 15.
The shaft portion 15a is in contact with the shaft portion 15a, and is fixed together with a mounting screw 17. At this time, the large diameter portions 11a, 13a of each mandrel segment 11.13 have an outer surface shape that defines a continuous outer peripheral surface, as shown in FIG.

The core rod 15 preferably has a flange portion 15b integrally formed on the shaft portion 15a, so that the flange portion 15b does not come into contact with the end face of each mandrel segment 11, 13 during assembly of the mandrel 10. Core rod 1
Positioning with respect to the mandrel divided pieces No. 5 becomes easy.

Further, the small diameter portion 11 of each mandrel segment is attached to the threaded portions 11c and 13c at both ends of the mandrel segment 11.13.
A push ring 20 is screwed onto the mandrel to hold the metal sleeve 4 fitted on the mandrel.

Next, with reference to FIG. 6, a method for manufacturing a fiber-reinforced composite resin roll 1 using the split type diameter-reducing mandrel IO having the above configuration will be described.

Mandrel 10 assembled as shown in FIG.
The metal sleeve 4 is fitted onto the press ring 20.
are screwed together and fixed (Fig. 6(A)).

Next, as shown in FIG. 6(B), the above-mentioned fiber reinforced composite resin layer 2 is attached to a metal sleeve 4 by a prepreg sheet winding method or a filament winding method.
and is formed over the large diameter portions 11a and 13a of the mandrel. When the fiber-reinforced resin layer is also formed on the push ring 20, it is preferable to wrap a tape around the outer peripheral surface of the push ring 20 so that the fiber-reinforced resin layer does not adhere to the push ring.

Once the fiber-reinforced composite resin layer 2 is formed in this manner, the fiber-reinforced composite resin layer 2 is then cured.

The outer surface of the cured fiber-reinforced resin layer 2 is polished to a predetermined diameter using a polishing machine. Note that both end surfaces of the fiber-reinforced resin layer 2 are also shaped to a predetermined length.

The push ring 20 is then removed from both ends of the mandrel, as shown in FIG. 6(C). Furthermore, attaching screw 1
7 and remove the core rod 15 from the mandrel by pulling it out in the axial direction.

As a result, as shown in FIG. 5, the mandrel segments 11.11 arranged in the vertical direction can be reduced in diameter toward the axial center, that is, in the direction toward each other.
Therefore, in this state, the mandrel divided pieces 11.11 are
It can be pulled out along the axial direction of the fiber-reinforced composite resin hollow tube 2 (FIG. 6(D)). Subsequently, the mandrel divided pieces 13.13 arranged in the left-right direction are moved toward the axial center,
That is, it becomes possible to reduce the diameter in the direction in which they approach each other, and it is possible to pull out the fiber-reinforced composite resin hollow tube 2 along the axial direction in the reduced diameter state.

In this state, a pair of previously prepared shaft portions 6 are fixed to the metal sleeves 4 at both ends of the fiber-reinforced composite resin hollow tube 2 by press-fitting or the like.

The fiber reinforced composite resin roll 1 manufactured by the above procedure is as follows:
As shown in Fig. 1, the shaft portion 6 is joined to the metal sleeve 4, so in addition to the above-mentioned press fitting, various high-strength fixing methods such as screwing and welding are possible. Moreover, unlike the case of conventional bonding by adhesive, there is no need to increase the joint area of the shaft portion, and the overall weight can be reduced. Furthermore, since the metal sleeve is integrated within the fiber-reinforced composite resin hollow tube 2, the mounting strength of this portion is sufficient.

Furthermore, when manufacturing the fiber-reinforced composite resin roll 1 using the above-mentioned procedure, there is no need for drilling or gluing as in conventional methods, and simple operations such as removing the mandrel can be carried out. The above composite resin roll can be easily made.

FIGS. 7 to 10 show other embodiments of mandrels that can be suitably used especially when manufacturing long fiber-reinforced composite resin rolls 1.

When manufacturing a long fiber-reinforced composite resin roll 1,
Naturally, the mandrel IO itself becomes longer and therefore each mandrel segment 11.13 also becomes longer. As described above, prepreg, for example, is wound around the outer periphery of the mandrel segment 11.13 to form the fiber reinforced composite resin layer 2. At this time, if the mandrel segments 11, 13 are long, the central portion may be deformed inward or circumferentially. According to this embodiment, a mandrel resting means 30 is provided to prevent such deformation of the mandrel segments 11, 13.

In this embodiment, the core metal rod 15 located on the left side in FIG.
A steady rest rod 31 having a center hole 15c formed through the center of the steady rest rod 31 forming a part of the mandrel steady rest means 30.
is placed in the center of the mandrel 10 through the center hole 15c. The mandrel 10 of the steady rest rod 31
A steady rest piece 32 is integrally attached to the end located in the center by welding or the like, and the other end is attached to the core metal rod 15.
The threaded groove 33 extends further outward, and the nut 3
4 are screwed together.

As best shown in FIGS. 9 and 10, the steady rest 32 has hook receivers 35 in a cross shape, and each hook receiver 35 is formed with a square square 36.

On the other hand, approximately in the center of the mandrel segment 11, J3,
As shown in FIGS. 7 and 8, a steady rest hook 37 is secured to each mantle segment 11.13 by screws 38. One end 37a of the steady rest hook 37 is formed into a V-shaped convex shape, and the hook receiver 35 has a
It is formed so as to be able to fit into the shape groove 36.

With the above configuration, when assembling the split type diameter reducing mandrel 10, for example, the mandrel split piece 11 of the core metal rod 15
．． 13, the V-shaped convex portion 37a of the steady rest hook 37 is aligned with the V of the steady rest piece 32.
The shaped grooves 36 are fitted, and then the nut 34 is tightened toward the cored metal rod 15. As a result, the steady rest piece 32 is attached to the v-shaped convex portion 37a of the steady rest hook 37.
The gutter 36 is firmly fixed.

Each mandrel segment 11.13 is therefore completely prevented from being deformed inwardly by external radial forces. Furthermore, even if a force in the circumferential direction acts on each mandrel segment 11.13, each mandrel segment 11,1
3 is prevented from moving in the rotational direction, that is, in the circumferential direction, by the action of the steady rest hook 37 and the steady rest throat 32.

As described above, according to this embodiment, by providing the mandrel steadying means 30, each mandrel segment 11.
13 is prevented from being deformed in the radial or circumferential direction, and a long fiber-reinforced composite resin roll 1 can be manufactured with high precision.

In the above embodiment, the steady rest hook 37 of the mandrel steady rest means 30 is provided approximately at the center of the mandrel divided piece 11.13, and the steady rest hook 32 is positioned correspondingly. It is also possible to provide a plurality of steady rest hooks 37 at arbitrary locations along the axial direction of the mandrel segments 11 and 13, and to provide a corresponding number of steady rest pieces 32.

As detailed above, the present invention can provide a U1 fiber-reinforced composite resin roll that is lightweight and has sufficient strength, and the manufacturing process is simple and reduces manufacturing man-hours. It has the advantage of reducing time and improving productivity.

[Brief explanation of drawings]

FIG. 1 is a partial vertical sectional view of an embodiment of a fiber-reinforced composite resin roll according to the present invention. FIG. 2 is a partial vertical sectional view of an embodiment of the mandrel according to the present invention. FIG. 3 is a cross-sectional view taken along the ITI-ITI line in FIG. 1. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. FIG. 5 is a sectional view similar to FIG. 4 illustrating the procedure for pulling out the split mandrel. FIGS. 6(A) to 6(D) are diagrams showing the manufacturing procedure of the fiber-reinforced composite resin roll according to the present invention. FIG. 7 is a partial vertical sectional view of another embodiment of the mandrel according to the present invention. FIG. 8 is a sectional view taken along the line ■-■ in FIG. 7. FIG. 9 is a partially sectional view showing an embodiment of the mandrel steady resting means. FIG. 10 is a sectional view taken along line X--X in FIG. 9. 2: Fiber-reinforced composite resin hollow tube 4: Metal sleeve 6: Metal shaft portion lO two-split type mandrel 11.13: Mandrel split piece 15: Core metal rod 20: Push ring 30: Mandrel steady rest means 31: Sway Stopping rod 32: Steady rest piece 37: Steady rest hook Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] 1) Metal sleeves are integrally molded and attached to both ends of a hollow tube made of fiber-reinforced composite resin, and a metal rotating shaft is fixed to the metal sleeves. A fiber-reinforced composite resin roll characterized by comprising: 2) Attach a metal sleeve with an uneven shape on the outer surface to the outer circumferential surface of both ends of the split type diameter reducing mandrel, and then attach the outer surface of the split type diameter reducing mandrel that defines the continuous outer circumferential surface. and forming a fiber-reinforced resin layer covering the outer surface of the metal sleeve, and after curing the fiber-reinforced resin layer, reducing the diameter of the split type diameter-reducing mandrel to form a fiber-reinforced resin layer and the metal sleeve. A method for producing a fiber-reinforced composite resin roll, comprising: pulling out the roll along the axial direction of the roll, and then fixing a metal rotating shaft portion to the metal sleeve. 3) A pair of mandrel segment pieces of the same shape that are arranged opposite to each other in one direction, a pair of mandrel segment pieces of the same shape that are arranged to face each other in the other direction, and a pair of mandrel segment pieces that are arranged inside both ends of each of the mandrel segment pieces. , a cored metal rod that fixes each of the mandrel segments together so as to define a continuous outer peripheral surface;
A split-type diameter-reducing mandrel comprising a push ring for holding a metal sleeve on the outer peripheral surface of both ends of each mandrel segment.