JPH068354A - Roll made of fiber reinforced resin and production thereof - Google Patents

Abstract

PURPOSE:To obtain a lightweight roll made of dimensional accuracy, having durability and low in production cost, especially, a feed free roll. CONSTITUTION:A roll 1 made of a fiber reinforced resin consists of the metal foil layer 6 woud around a tubular body 5 made of a fiber reinforced resin, the tubular body made of a fiber reinforced resin having electrolytic plating layers 7, 8 on the metal foil layer 6 and the bearings 3 and/or shafts 2 provided to both end parts of the tubular body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber-reinforced resin (hereinafter sometimes referred to as FRP) roll whose surface is coated with a metal, and a method for producing the roll. Particularly, it relates to a free roll suitable for transporting paper or an organic film.

[0002]

2. Description of the Related Art FRP has a higher specific strength than metal materials.
Since it has a characteristic that it has a high specific rigidity, its use in the industrial field has been activated and it has also begun to be used in rolls. However, FRP rolls have a lower hardness than metals and are therefore scratched by objects to be contacted. They have poor wear resistance and thus have a short life. In addition, since they are poor conductors of electricity, in the case of paper or organic films There was a problem that static electricity is easily generated.

Therefore, the surface of the FRP roll is often metalized before use. For this kind of roll, F
A roll in which the surface of the RP cylinder is covered with a conductive treatment material layer, a copper or nickel layer and a hard chrome layer from the inner layer, or a resin coating layer such as epoxy resin on the surface of the FRP roll tube and the metal journal part. 10 to 100
There is known an FRP metal-coated roll having a thickness of μm and a plurality of metal-coated layers provided on the surface of the coating layer by plating.

However, in the former case, a resin made conductive with a conductive metal powder such as silver is added to the FRP roll.
It is placed on the surface of the aluminum tube and is directly electroplated.
In the latter, electroless plating and electrolytic plating are performed after a specific resin for chemical plating is placed on the surface of the roll tube. In these cases, there are problems that the bonding between the plating layer and the roll surface is poor, a high-performance roll cannot be obtained, the number of machining steps is large, and the manufacturing cost is high.

Further, in Japanese Patent Laid-Open No. 2-286237, there is disclosed a metal tape-covered FRP rod-shaped molded product obtained by winding and coating a metal tape on the outer peripheral surface of an uncured fiber-reinforced resin layer and curing the metal tape. It is specifically described. However, if a metal tape is wound around the outer peripheral surface of the uncured fiber-reinforced resin layer, irregularities are inevitably formed, so it is difficult to obtain a molded product with high dimensional accuracy. The FRP rod-shaped molded article is suitably used for applications such as a connecting pipe for excavation of a boring machine in the field of civil engineering, oil development, etc., a propeller shaft for power transmission of automobiles, ships, etc., or torque transmission of shocks, and a construction field. It is described that it is preferably used as a high-strength structural material to which tensile force and compression force are applied. Further, it is described that the outer surface of the metal tape-covered FRP pipe can be plated with hard chromium, and the corrosion resistance and wear resistance can be further improved. However, there is no description about a free-rolling roll, so-called free roll, which is not used for transmitting a rotating torque or impact, and has neither a tensile force nor a compressive force. Further, as the metal tape, a stainless steel tape is merely illustrated.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems, and assures stable and high adhesive strength between the FRP layer and the plating layer in terms of performance and is lightweight. Another object of the present invention is to provide an FRP roll, particularly a FRP free roll, which has excellent dimensional accuracy, can withstand long-term use stably, and can simplify the manufacturing process.

[0007]

The present invention is directed to a fiber-reinforced resin tubular body having a metal foil layer wound around the outer surface of a fiber-reinforced resin tubular body and an electrolytic plating layer on the metal foil layer, and Bearings attached to both end faces of the tubular body and /
Further, the present invention relates to a fiber-reinforced resin roll including a shaft and a method for manufacturing the roll.

In the present invention, the reinforcing fibers used in the fiber-reinforced resin tubular body are preferably fibers having a high elastic modulus and strength because it is necessary to reduce the amount of bending under load and increase the resonance frequency during rotation. Such fibers primarily include carbon fibers, glass fibers, aramid fibers, and ceramic fibers. Moreover, you may combine these 2 or more types. Fibers having a large specific strength and specific rigidity are preferable because the effect of weight reduction is more remarkable. A fiber having an elastic modulus of 150 GPa or more, preferably 200 GPa or more is preferable. A carbon fiber is mentioned as a fiber whose elastic modulus is 150 GPa or more.

The matrix resin is not particularly limited, and may be epoxy resin, unsaturated polyester resin, vinyl ester resin, urethane resin, phenol resin, alkyd resin, xylene resin, melamine resin, furan resin, silicone resin or the like. Thermosetting resin, polyethylene resin, polypropylene resin, polyvinyl chloride resin,
Polymethacrylate resin, ABS resin, fluorine resin, polycarbonate resin, polyester resin, polyamide resin (nylon 6, 6.6, 6.10, 6.11, 6.1)
2, etc.), and thermoplastic resins such as polyphenylene sulfide resin, polysulfone resin, polyether sulfone resin, polyether ether ketone resin, and polyphenylene oxide resin. Among these,
Epoxy resin, unsaturated polyester resin and vinyl ester resin are preferable from the viewpoint of handleability. Further, two or more kinds of resins can be combined as required.

The metal foil wound around the outer surface of the fiber-reinforced resin tubular body is preferably a metal tape-shaped one in terms of operability. The material of the metal foil is preferably one that is stretchable, does not cause corrosion, and can obtain a high current density. Examples of such a material include copper, nickel, a two-layer structure of nickel / copper, and a three-layer structure of nickel / copper / nickel. Examples of the metal foil include electrolytic metal foil and rolled metal foil. Examples of the metal tape include electrolytic metal tape and rolled metal tape. In particular, electrolytic metal foil and electrolytic metal tape are preferable. Further, in order to obtain a high bonding strength at the bonding surface with the fiber reinforced resin, it is preferable that at least the surface of the metal foil which is in contact with the fiber reinforced resin is roughened. As such a material, a metal foil having one or both surfaces roughened, particularly a metal tape, is preferable.

Here, roughening means that the surface of the metal foil is made uneven, bumpy, or mushroom-shaped. Examples of the roughening method include electrochemical treatment, chemical treatment such as etching, and mechanical treatment such as rubbing with a wire brush.

The thickness of the metal foil is 10 to 1 from the viewpoint of handleability.
50 μm is preferable. More preferably 20 to 100 μ
m. If the thickness is less than 10 μm, it is not preferable because wrinkles tend to occur at the time of winding and the film may break due to the winding tension. Further, if the thickness exceeds 150 μm, the rigidity of the material increases, which makes it difficult to form a uniform winding layer on the surface of the tubular body, which is not preferable.

The width of the metal foil is not particularly limited. It is also possible to wrap the entire tubular body with one layer of foil. However, from the viewpoint of workability, the width of the foil is preferably 10 to 200 mm, more preferably 20 to 100 mm.

Regarding the electrolytic plating layer, it is possible to directly perform chrome plating on the metal foil, but it is preferable to plate copper or nickel on the lowermost layer as a base material,
The uppermost layer is preferably chromium plated.
Copper and nickel are preferable because they have a lower elastic modulus than chrome and are flexible, and when they are plated with chromium, they serve as a stress relaxation layer and serve to prevent the generation of surface cracks. Chromium plating is preferable as the uppermost layer because high hardness can be obtained. It is particularly preferable that the electrolytic plating layer is a fiber-reinforced resin roll having a double structure of copper or nickel in the lower layer and chromium in the upper layer.

The material of the shaft and / or bearing used in the present invention is not limited, and a metal such as steel or aluminum, or a metal plated on the metal, or particularly weight reduction is desired. For the purpose, those made of FRP containing carbon fibers, glass fibers, etc. as reinforcing fibers, or those plated with metal can be used.
In the case of molding the FRP bearing portion, the reinforcing fiber and the matrix resin used in the production of the FRP tubular body can be used in combination, but it is not necessarily the same as the material used in the FRP tubular body production. No need. Although various conventionally known methods can be used for the production, for example, the filament winding method or the sheet-like prepreg is laminated on a mold material to be heated, pressure-shaped, or produced by a hand lay-up method. You can It is preferable to use a metal bearing part because the effect of removing static electricity is remarkable.

The production of the fiber-reinforced resin tubular body is not particularly limited. For example, it can be manufactured by impregnating a fiber tow of reinforcing fibers with an uncured resin, molding it by a filament winding method, and curing it. Further, a tubular body can be manufactured by winding a sheet-like prepreg in which the uncured resin is impregnated in the aligned fiber bundles, around a mandrel, and heating and pressing.

The surface of the fiber-reinforced resin tubular body is preferably subjected to turning and / or grinding before winding the metal foil in order to maintain the accuracy of the surface after plating. As a result, roundness and verticality can be easily obtained. The accuracy of turning or grinding can be appropriately determined according to the required performance. Thus, winding the metal foil around the cured fiber-reinforced resin tubular body as it is, preferably by turning and / or grinding, is more preferable than winding the metal foil around the uncured fiber-reinforced resin tubular body. However, it is preferable because a product having high dimensional accuracy can be obtained.

When the metal foil is wrapped around the fiber-reinforced resin tubular body, it is preferable to apply an adhesive between the metal foil and the tubular body in order to bring them into close contact with each other. The adhesive is preferably a room temperature curing type. If temperature is applied during curing, the tubular body will be deformed and the dimensions will change, resulting in a decrease in accuracy. In addition, it is not good because the process becomes complicated. The viscosity of the adhesive is preferably 500 centipoise or less. It is more preferably 100 centipoise or less, and particularly preferably 50 centipoise or less. When it exceeds 500 centipoise, the adhesive exudes from the gap between the foils when the metal foil is wrapped, and the surface is contaminated. This causes a problem that the electrolytic plating in the next step becomes difficult to ride, which is not preferable.

When the metal foil is wound around the fiber-reinforced resinous tubular body, it is preferable that the side surfaces of the metal foil are tightly wound so as not to generate a gap, or that the metal foils are partly overlapped. . If a gap is generated, electrolytic plating in the next step does not reach that portion, and a good product cannot be obtained, which is not preferable. When the metal foils partially overlap, the overlap margin is preferably about 0.1 to 10 mm.
If the thickness is less than 0.1 mm, strict process control is required to prevent the formation of a gap, which is not preferable. 1
If it exceeds 0 mm, material loss increases, which is not preferable.

When the metal foil is wound, the foil is 0.1
It is preferred to wind while applying tension to the foil such that it stretches by ~ 2%. If the elongation of the foil is less than 0.1%, the foil will meander or have unevenness on the surface, and a good product cannot be obtained, which is not preferable. Further, if the elongation of the foil exceeds 2%, there is a risk of breaking the metal foil, which is not preferable.

The thickness of the electrolytic plating of the underlayer on the fiber-reinforced resin tubular body wrapped with the metal foil is 50 to 2000 μm.
m is preferred. More preferably 100 to 1000 μm
Is. If the thickness is less than 50 μm, the effect as a base material is not sufficient and the surface smoothing process for chrome plating cannot be performed, which is not preferable. If it is thicker than 2000 μm, the weight-reducing effect is diminished, and the merit of using FRP is reduced, which is not preferable.

In order to ensure the surface accuracy when the uppermost plating layer is attached, it is preferable to turn, grind or polish the surface after attaching the underlayer. By these machining processes, the thickness of the underlayer including the metal foil is 100 to 1000 μm.
It is preferable to adjust to m. By this adjustment, the smoothness of the surface and the strength of the base material can be maintained.

Chromium is usually used for plating the uppermost layer, but the thickness is appropriately determined according to required specifications. Usually 5
About 100 μm is used. Machining of this layer is usually performed by polishing, but is not particularly limited.

In the fiber-reinforced resin roll of the present invention, F
The RP tubular body and the bearing portion can be joined by a known adhesive. Alternatively, it is possible to use both mechanical joining such as pinning and adhesive joining. Further, the FRP tubular body and the bearing portion can be integrally formed by the above-mentioned filament winding method or the like.

[0025]

EXAMPLES The present invention will now be described in more detail by way of examples, which should not be construed as limiting the invention thereto.

As the carbon fiber, there was used Magnamite AS4 (elastic modulus 235 GPa, strength 3.82 GPa) manufactured by Sumika Hercules Co., Ltd. As the epoxy resin composition, Sumitomo Chemical Co., Ltd. trade name Sumiepoxy ELA128 (bisglycol A diglycidyl ether) is used as the epoxy resin, and as the curing agent, Uniroyal trade name Tonox 60-40 (metaphenylenediamine and A eutectic mixture of diaminodiphenyl ether) was used in a stoichiometric amount.

Example 1 A stainless steel mandrel having an outer diameter of 80 mm and a length of 2000 mm was mounted on a filament winding apparatus, a mold release agent was applied to the mandrel, and then carbon fiber was impregnated in a liquid epoxy resin composition. Wrapped around The winding angle of the fiber was ± 16 °, and the winding thickness was 10 mm. The adhesion amount of the resin was adjusted so that the volume ratio of the fiber to the resin was 60 ± 2%.

The resin-impregnated carbon fiber wound around the mandrel was placed in a thermosetting oven together with the mandrel and cured at 150 ° C. for 2 hours. After curing, the mandrel was released from the mold, and unnecessary portions at both ends were cut and removed. Further, the surface was cut using a lathe to obtain a carbon fiber reinforced resin tubular body.

A plain woven fabric having a basis weight of carbon fiber of 300 g / m ² was cut into a circle having a radius of 40 mm, impregnated with the same resin as in the case of the above tubular body production, 16 sheets were laminated, and 120 sheets in a hot press. Two disks with a thickness of 5 mm were molded by heating under pressure at 15 ° C. for 2 hours. In order to use the carbon fiber reinforced resin disc as a bearing (header) portion of the roll, a circular hole having a radius of 10 mm was formed at the center of the disc. Further, unnecessary resin adhering to the circumferential portion of the disk and spouting at the time of molding was removed by cutting to obtain a carbon fiber reinforced resin bearing having a radius of 40 mm with high accuracy.

The bearing 3 has a length of 200 mm and a radius of 10
A mm steel shaft (journal) 2 was attached using a carbon fiber woven fabric and an adhesive as shown in FIG. The shaft / bearing joint is shown at 4. As the adhesive, the above ELA128
Was mixed with stoichiometric amount of triethylenetetramine and cured at 80 ° C. for 30 minutes to prepare two carbon fiber reinforced resin bearings 3 to which the metal shaft 2 was attached.

Subsequently, the same adhesive as that used for attaching the shaft to the bearing is applied to the peripheral portion of the disk of the bearing 3 to which the metal shaft 2 is attached, and a carbon fiber reinforced resin tubular body is applied. They were fitted to both ends of No. 5 and cured at 80 ° C. for 30 minutes for adhesion.

This CFRP tubular body is attached to a lathe,
An electrolytic nickel foil tape having a width of 50 mm and a thickness of 35 μm was wound around the surface to form the metal foil layer 6. At that time, a cyanoacrylate adhesive 301 manufactured by Toagosei Kagaku Kogyo Co., Ltd. was thinly applied on the CFRP tubular body as an adhesive, and the tape was wound so that the metal tapes were overlapped by 1 mm while applying a tension of 15 kg.

After removing the adhesive that has exuded from the overlapping portions with emery paper, electrolytic copper plating is performed,
A lower plating layer 7 having a thickness of 700 μm was formed. After grinding the outer periphery with a lathe, the surface was polished to a surface roughness of 1 S with a polishing machine, and then electrolytic chromium plating was performed to form an upper plating layer 8. The surface of the electrodeposited film having a thickness of 40 μm was polished to a surface roughness of 0.5 S, the dynamic balance was corrected, and a fiber-reinforced resin roll 1 was obtained. This can be suitably used as a transport free roll.

[0034]

INDUSTRIAL APPLICABILITY The present invention has the same surface performance, static eliminability, and light weight as those of known fiber-reinforced resin rolls in various industrial fields such as film transport, papermaking, and printing. The present invention provides a fiber-reinforced resin roll, particularly a free roll for transportation, which has excellent dimensional accuracy, durability, low manufacturing cost, and is useful for the purposes of improving productivity and saving labor.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a fiber reinforced resin roll.

[Explanation of symbols]

 1. Fiber reinforced resin roll. 2. Axis (journal). 3. Bearing (header). 4. Shaft / bearing joint. 5. Tubular body made of fiber reinforced resin. 6. Metal foil layer. 7. Lower plating layer. 8. Upper plating layer.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical display location B29L 9:00 4F 31:32 4F (72) Inventor Koji Yamatsuta 6 Kitahara, Tsukuba-shi, Ibaraki Sumitomo Chemical Industrial stock company

Claims (4)

[Claims] 1. A fiber reinforced resin tubular body having a metal foil layer wound around the outer surface of a fiber reinforced resin tubular body and an electrolytic plating layer on the metal foil layer, and attached to both ends of the tubular body. Fiber-reinforced resin roll consisting of a bearing and / or shaft. 2. The fiber-reinforced resin roll according to claim 1, wherein one or both surfaces of the metal foil are roughened. 3. The fiber-reinforced resin roll according to claim 1, wherein the metal foil has a copper, nickel, nickel / copper two-layer structure, or a nickel / copper / nickel three-layer structure. . 4. Electrolytic plating is performed after winding a metal foil while applying an adhesive or winding a metal foil coated with an adhesive on the surface of a fiber-reinforced resin tubular body. The method for producing a fiber-reinforced resin roll according to claim 1.