JPH02159409A - Roll - Google Patents

Abstract

PURPOSE:To lighten a roll and improve its surface peel-off property by impregnating carbon fibers with thermosetting resin so as to form reinforced fibers, forming a raw tube with the reinforced fibers wound around a mandrel so as to form a fluorine resin file on its surface. CONSTITUTION:A roll material 1 is obtained by removing, from a mould of mandrel, a raw tube made after impregnating fibers with thermosetting resin and heat curing them, cutting the raw tube in a specific length, and polishing its outer surface. Then, inorganic powder like inorganic filler or the like is mixed with thermosetting type resin, applied in spray on a raw tube for roll 1 and heat-cured to form a base treatment layer 2. A fluorine resin film 3 is formed on it, but when, for example, a fluorine resin the melting point of which is high and which cannot stay as molten material such as 4-ethylene- fluoride is used, the flame coating method is suitable as its method. Or there is another method that 4-ethylene-fluoride and 6-polypropylene-fluoride are copolymerized together mixted with binder and baked to form the fluorine resin film 3. A roll obtained in such a way is light in its weight and rich in its high rigidity, peel-off property and chemical-proof property.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a roll that is lightweight and has high rigidity.
In particular, the present invention relates to rolls such as transport rolls and guide rolls used in the paper manufacturing industry, paper processing industry, etc., which require releasability or non-adhesion between the workpiece and the roll surface.

(Prior Art) Up until now, rolls used in the paper manufacturing industry, paper processing industry, etc. have mainly been made of steel or aluminum. In addition, the material for the surface treatment of the roll is Cr.
There are plated, ceramic sprayed, fluororesin coated, and fluororesin tubes that are shrunk and covered on the surface of the roll. Rolls that require removability or non-stick properties have been coated with a fluororesin or covered with a shrink tube.

(Question 8 to be solved by the invention) However, since the base material of these rolls is made of metal, they are heavy, and therefore have a low moment of inertia (GD").
is large, and therefore, when the roll is rotated, high tension is applied to the workpiece, or the workpiece is wrapped around the roll surface thickly.If high tension is applied to the workpiece, reduce the quality of the finished product,
It may not be possible to produce thin products, or if the processed material is sticky, it may wrap around the roll surface and make workability worse.
It had various problems such as not being able to increase processing speed.

On the other hand, even when a shrink tube is placed over the surface of the roll base material, the problem of the weight of the roll remains unresolved.In addition, shrink tubes are generally highly electrostatic and tend to have static electricity on their surfaces. In the case of large rolls, the sliding contact increases when the roll rotates, and the surface becomes extremely dirty due to a large amount of static electricity.The dust becomes a lump and sticks to the workpiece, and furthermore, the surface is too soft and can cause scratches. It had drawbacks such as being easy to stick to. Therefore, it has been desired to develop a roll that is lightweight, has a good surface releasability, and is resistant to scratches.

The present invention has been made in response to these demands, and therefore aims to provide a roll that is lightweight, highly rigid, has excellent surface releasability to processed materials, and generates extremely little static electricity.

(Means and effects for solving the problem) Therefore, the present invention provides a roll structure characterized in that the base material is a cylindrical body made of a carbon fiber composite material having a fluororesin film integrally formed on the surface. is the solution to the above problem.

Hereinafter, the present invention will be explained in detail with reference to FIGS. 1 and 2, together with its operation. First, to explain the manufacturing method of the roll according to the present invention, the roll according to the present invention uses carbon fiber tow as a reinforcing fiber, impregnates the fiber with a thermosetting resin, wraps it around a mandrel and heats it to harden it. Manufacture. This finished raw tube is demolded from a mandrel, cut into a predetermined length, and its outer diameter is polished with a polisher to obtain a raw tube 1 that will serve as a roll base material. Thereafter, as shown in FIG. 1, a fluororesin film is formed on the surface of the raw tube 1, and a bearing header 4 or journal 5 is attached as required to form a roll. The bearing header 4 or journal 5 may be attached to the roll tube 1 before forming the Teflon film. Furthermore, the fluororesin film can be polished to obtain a desired surface roughness, if necessary.

A method for forming a fluororesin film on the surface of the roll tube 1 will be described in more detail with reference to FIG. 2.

In order to firmly adhere the fluororesin film to the surface of the roll tube 1, known methods such as JP-A-60-2149 can be used.
By using the method disclosed in No. 57, it is possible to form a fluororesin film 3 with high adhesion strength. That is,
A metal or inorganic powder with a special shape, such as an inorganic filler that is not flat or an inorganic filler with a complicated surface unevenness, is mixed with a thermosetting resin and spray-painted onto the roll tube 1 made of carbon fiber composite material. , heat curing to form a base treatment layer.

The type of thermosetting resin used here is roll tube 1.
If an epoxy resin is used as the matrix resin of the base pipe 1, the resin used for the base treatment layer 2 should also be of the same type as the epoxy resin. Base pipe 1
The adhesion strength between the surface of the substrate and the base treatment layer 2 can be ensured. In addition, fillers blended into this resin have particularly complex surface irregularities and are excellent in corrosion resistance, such as N,
Powder is convenient.

When the surface of the base treatment layer 2 formed in this way is viewed microscopically, the base treatment layer 2 has very complicated irregularities, so when the fluororesin film 3 is formed on top of this, extremely strong adhesion can be achieved. It will have strength.

The method for forming the fluororesin film 3 on the base treatment layer 2 differs depending on the type of fluororesin to be formed.

In order to form a film using a single material such as tetrafluoroethylene or trifluoroethylene, a thermal spraying method is convenient. In other words, although these fluororesin materials, especially tetrafluoroethylene, have many excellent properties, their high melting point and lack of solvents make it difficult to form films other than thermal sprayability. It is from.

When forming these coatings by thermal spraying, if metal powder such as N is mixed as a filler in the base treatment layer 2, thermal conductivity is good, and the coating is coated onto the base pipe 1 made of carbon fiber composite material by thermal spraying. Even if a certain amount of heat is applied, the heat is instantly dissipated, so that the raw tube 1 is not damaged, which is very convenient. The thermal spraying method for this purpose may be various methods such as a plasma spraying method or a powder flame spraying method, but this method is not particularly limited.

Moreover, a coating method can also be adopted as a method for forming a film of fluororesin. This is generally a method in which tetrafluoroethylene and hexafluoride polypropylene are copolymerized, mixed with a binder, and fired. This method is a method in which the base treatment layer 2 is coated by spray coating or electrostatic coating and then fired, and the feature of this method is that it can be fired at a relatively low temperature. Although the binder resin in this case is not particularly limited, epoxy resin, silicone resin, etc. are generally used.

Providing the base treatment layer 2 between the raw pipe 1 and the fluororesin film 3 in this way is a convenient method for increasing the adhesion strength.

Further, the type of fluororesin is not limited to those mentioned above, and the film forming method is not particularly limited either, and various methods can be employed.

The roll made of carbon fiber composite material that has a fluororesin integrally on its surface, manufactured as described above, is a lightweight and highly rigid roll that takes advantage of the high specific modulus of carbon fiber composite material. In addition to this, it is possible to obtain a roll that has the properties of fluororesin that are removable from the processed material, that is, non-adhesive, and has chemical resistance, so it is particularly useful for improving the quality and processing of processed materials in the paper manufacturing industry, etc. Contributes to speed improvement.

Table 1 shows Mitsubishi Rayon's high-strength carbon fibers, medium-modulus carbon fibers, and high-modulus carbon fiber rolls with an inner diameter of 90 mm, an outer diameter of 100 mm, and a length of 1000 mm, which have the same rigidity as a /l roll. Each weight when using carbon fiber,
GD2 (rate of inertia), self-weight deflection, etc. are calculated. From this table, the roll made of carbon fiber composite material is A420-
It can be seen that this material has extremely superior mechanical performance compared to the conventional steel.

Further, when the above-mentioned inertia factor and dead weight deflection are reduced, the contact friction with the object to be processed during rotation of the roll is reduced, the generation of static electricity on the surface of the roll made of fluororesin is suppressed, and the surface of the object to be processed is not contaminated.

Table 1 Here, various methods such as filament winding method, sheet wrapping method, etc. can be adopted as a method for manufacturing the raw pipe made of carbon fiber composite material, and there is no particular restriction.

Regarding the types of carbon fibers, high-strength carbon fibers, medium-modulus carbon fibers, high-modulus carbon fibers, etc. can be used. It is better to use high modulus carbon fiber.

The matrix resin of the composite material is not particularly limited, and in the case of thermosetting resins, epoxy resins, phenolic resins, polyimide resins, vinyl ester resins,
Typical thermoplastic resins include nylon resin, polycarbonate resin, PEEK, PEK, PPS, and PEI.

Types of surface fluororesin include tetrafluoroethylene, trifluoroethylene, difluoroethylene, monofluoroethylene, hexafluoropolypropylene, copolymer of fluoroethylene and hexafluoropolypropylene, and trifluorochlorine ethylene. Resin, vinylidene fluoride, etc. can be used.

Further, various methods such as plasma melting method, powder flame spraying method, electrostatic coating method, spraying method, brush coating method, etc. can be adopted as a method for forming a film using the same resin.

(Example) Hereinafter, the present invention will be specifically explained with reference to Examples.

Example 1 A papermaking roll having an inner diameter of 142B, an outer diameter of 1501cm, and a length of 20001m, the base material of which was made of a carbon fiber composite material, and the outer surface of which was coated with a fluororesin, was manufactured.

Pyrofil MM-10 manufactured by Mitsubishi Rayon was used as the carbon fiber, and epoxy resin was used as the resin.

The average Young's modulus (E) in the axial direction at this time is 10,300 kg
/mm”.

Further, for the surface of the roll, a mixture of a copolymer of tetrafluoroethylene and hexafluoride polypropylene with an epoxy resin as a binder was used. To manufacture the roll, first prepare carbon fiber and epoxy resin, wrap the resin-impregnated carbon fiber onto an iron mandrel with an outer diameter of 142 mm using a filament wine gourd, remove it from the mandrel after heating and hardening, and roll it into the specified shape. Cut to length and use a cylindrical sander to reduce the outer diameter to 14mm.
Polished to 9.6mm. A base treatment layer made of N, powder, and epoxy resin was spray-coated to a thickness of 0.05 m on the surface of the roll tube made in this way, and after hardening by heating, a fluororesin was spray-coated on top. . The thickness of the spray coating at this time was 0.15 mm. This was placed in a heat curing furnace and baked at a temperature of 270° C. for 90 minutes.

A journal-equipped hemplate was attached to the fluororesin-coated roll shell A with adhesive to form a roll. In order to investigate the surface releasability of the same roll,
When the contact angle with water was measured, it was 95 to 100 degrees, confirming that it had a sufficiently high non-adhesive property.

When this roll was used in the process of laminating paper and polyethylene, it was lightweight and had excellent peelability, so the processed material did not wrap around the roll (and workability was greatly improved).

(Effects of the Invention) As described above in detail, the roll according to the present invention can be lighter in weight than conventional metal rolls, so its rotational performance is increased and the tension and wrapping of the processed material can be reduced. In addition, since the surface releasability is good, the product does not get wrapped around the roll, improving operability, improving processing speed, and improving quality.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an example of the roll configuration of the present invention, and FIG. 2 is a partial sectional view of the same roll shell. Explanation of the main parts of the figure 1 - (Made of carbon fiber composite material) base pipe 2 - Base treatment layer 3 - Fluororesin 4 - Header 5 - Journal A - Roll shell 1 Figure 2 Figure procedure amendment 1, indication of the case Japanese Patent Application No. 63-313602 2, name of the invention Roll 3, person making the amendment Relationship to the case Patent applicant name (603) Mitsubishi Rayon Co., Ltd. 7° Subject of amendment Contents of amendment in the Detailed Description of the Invention column Contents of amendment 1, page 12, line 8 of the specification cylinder, '0.15mm' was changed to '0.15mm'.
Correct it to 0°05mm. 2. On the 9th line of the same page in the same book, "270°C" was changed to "230°C".
Correct it as "C". that's all

Claims (1)

[Claims] A roll characterized in that its base material is a cylindrical body made of a carbon fiber composite material that integrally has a fluororesin film on its surface.