JPH0487779A - Manufacture of high density felt cylindrical body - Google Patents

Abstract

PURPOSE:To prevent cutting felt chips from being generated by using many sheets of annular disc unit, annularly sewed by a reinforcing thread along an internal peripheral side, and inserting these disc bodies to a fitting mandrel to be compressed. CONSTITUTION:A felt material, cut into belt shape from a felt sheet, is used and almost uniformly curved by extending one side edge of this belt-shaped felt material, and an obtained helical felt material 6 is wound several turns on a molding mandrel and annularly overlapped. The felt material 6, left as placed in this condition, is removed from the mandrel and annularly sewed by a reinforcing thread 11 along the internal peripheral side of an annular disc body 10, and a large number of sheets of these disc bodies 10 are inserted to a fitting mandrel 12 and laminated. Next, this felt laminated body 10a is strong compressed by a press 13 and also impregnating an internal peripheral surface and the whole of a compressed laminated body 14 with resin and drying the body 14 or holding a shape by mounting both fixed discs to obtain a desired high density felt cylindrical body.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for manufacturing high-density felt cylindrical bodies that can be made from small diameters to large diameters, and relates to high-density felt cylindrical bodies that can be used for conveying rollers for surface-treated copper plates or aluminum shapes. The present invention relates to a method for manufacturing a density felt cylinder.

(Prior Art) In an aluminum processing factory, an extruded shape immediately after coming out of a die is first supported by a plurality of conveyance rollers, and then sent to a predetermined conveyance machine or post-processing equipment. Immediately after the extruded shape comes out of the die, the temperature is close to the melting point of aluminum (660°C), and direct contact with the surface of the conveying roller will damage the surface. It was fitted with a felt tube made of synthetic fibers. This felt tube can only be manufactured with the unique shaft dimensions of the needle punch machine, resulting in low product variation and high unit costs.
Since it is impossible to replace parts of the tube and it is difficult to judge the appropriate replacement time, felt rolls are beginning to be used as conveyor rolls. On the other hand, in steel processing factories, after pickling and annealing the rolled steel strip, it is passed through an electrolytic layer containing dissolved tin to be continuously plated, and then the plated surface is heated to give it luster and alloy. Develop layers. The copper plate immediately after plating is preferably slowly cooled in order to sufficiently develop the alloy layer, and for this purpose, the use of felt rolls as conveyance rolls is being considered. This felt roll is made by fitting a felt piece cut into a disc shape from a felt sheet onto a core.
It is common to manufacture by laminating a large number of sheets.

(Problems to be Solved by the Invention) Conventional felt rolls produce a laminated cylindrical body by cutting felt sheets into disk shapes, which is uneconomical as a large amount of cut felt waste is generated from the sheets. The cost of disposal will be required. Also, when compressing a laminated cylindrical body from the side edges with a press by fitting a large number of disc-shaped felt materials onto a mandrel, if the compression force is too strong, the central part of the laminate spreads out radially, resulting in a barrel-shaped laminated cylindrical body. This makes it unsuitable for use as a conveyor roll due to its shape, and tends to cause deformation during use. On the other hand, if the compression force is saved in order to prevent the barrel shape, the laminated cylinder will not have sufficient hardness and will have poor durability as a conveying roll.

The present inventor has already drafted Japanese Patent Application No. 1-65644 in order to improve the above-mentioned problems, and furthermore, in the present invention, a high density The purpose of this invention is to provide an alternative method for producing felt torsos.

(Means for Solving the Problems) In order to achieve the above object, in the method of the present invention, as shown in FIG. A felt material 2 cut into strips from a sheet (not shown) is used. The fibers constituting the band-shaped felt material 2 may be appropriately selected depending on the purpose, and one or more types of natural and synthetic fibers or a mixture of both may be used. For example, for conveyor rollers for surface-treated steel plates and aluminum profiles, aramid fibers, which are heat-resistant fibers, may be used alone or mixed with aramid fibers and carbon fibers, etc.Aramid fibers include loose phenylene terephthalamide fibers and meta-phenylene isophthalamide fibers. etc.,
The former is preferable in terms of high temperature resistance, while the latter can be used in relatively low temperature locations. The carbon fibers used in combination include flame-resistant fibers with relatively low heat resistance, and the content and quality may be appropriately selected depending on the location of use. On the other hand, polyester fibers may be used for the felt material 2 for transporting aluminum shapes and the like in a low temperature state, and wool or the like may be used for the polishing roll.

By utilizing the characteristics of felt in which the fibers are intertwined, the band-shaped felt material 2 is curved almost uniformly by bending the side edges. It may be curved almost uniformly between the rollers 4, 4 (FIG. 2). The obtained spiral felt material 6 is wound around a forming mandrel 8 several times to polymerize into a disk shape, as shown in FIG.
cut. In this state, it is fixed with a clip or the like and removed from the mandrel 8, and as shown in FIG. The material 6 is fixed in a ring shape. The reinforcing thread 11 is a high-strength thread that does not break even during compression work, and is made of, for example, Kevlar filament (trade name). The reinforcing thread 11 is generally sewn close to the inner periphery of the disc body 10, but when cutting vertical grooves on the circumferential surface of the cylindrical body after molding, the sewing position is set so as not to cut the reinforcing thread 11 during cutting. It is necessary to do so.

As illustrated in FIG. 5, a large number of thin annular felt discs 10 are stacked by being inserted through a fitting mandrel 12, and the diameter of the mandrel 2 is approximately equal to that of the mandrel 8. Next, the felt polymer 10a is strongly compressed from the side ends with the bush L/s 13, and the height of the felt polymer 10a is drastically reduced by this compression process. The compressed laminate 14 is impregnated with a resin on its inner circumferential surface or in its entirety and dried while maintaining the compressed state using appropriate fixing means. The resin used in resin processing may be selected depending on the use of the cylindrical body. It is also possible to weld or bottle the stationary disk 16.16 (FIG. 7) in its compressed state. In addition, during compression, the disc body 10 contracts somewhat inward in the radial direction, and in a compressed laminate, the circumferential surface of the mandrel is strongly tightened, so the pipe 18 (fitting mandrel) (
If a rotation stopper 20 is formed on the horse surface of FIG. 8), it is possible to obtain a felt roller in which the compressed laminate is fixed to the pipe.

As a finishing process, the outer peripheral surface of the cylindrical body is surface polished to obtain a high-density felt cylindrical body. The diameter of this felt cylinder is
It is determined according to the outer diameter of the molding body rod 8, and -g has a diameter of approximately 35 mm.
It is possible to manufacture up to a size of around 3 m to 3 m. The method of the invention results in high-density felts that have a wide range of applications, for example to obtain felt cylinders with a density of 0.3 to 0.8 g/cm3 from felt sheets with a density of 0.05 g/cm3.

(Function) In the method for manufacturing a felt cylindrical body according to the present invention, a reinforcing thread 11 is sewn in a circular shape along the inner periphery of the annular disc body 10 made of felt, and due to the presence of the sewn reinforcing thread 11, the breather 13 is When strongly compressed, the felt polymer 10a does not deform as the central portion expands radially outward, resulting in a compressed laminate 14 having a precise cylindrical shape. In this compressed laminate, the compressed state is maintained as it is by appropriate fixing means, or by impregnating and drying the inner peripheral surface or the entire body with resin, it maintains an accurate cylindrical shape even after the fixing means is removed. .

(Example) Next, the present invention will be explained by examples.

Example 1 To produce a felt cylinder, aramid fiber (trade name: Conex, manufactured by Teijin) with a density of 0.05 g was used.
/cm3 and a felt sheet with a thickness of 1.5 mm is used.

This sheet is cut to a diameter of 15 mm to form a band-shaped felt material 2. The felt strip 2 is passed through a pair of conical rollers 4.
4 (Fig. 2), and one side edge thereof is curved almost evenly. The obtained spiral felt material 6 is wrapped around the inner periphery of a 35 mm diameter molding guard 198 (FIG. 3) three times to form an annular polymer. cut. This polymerized state is fixed with a plurality of clips (not shown), removed from the mandrel 8, and then sewn along the inner periphery of the annular disc body 10 with Kevlar filament (trade name, E).

(2) Sew in a circular shape with reinforcing thread 11 (manufactured by DuPont).

A large number of thin annular discs 10 are stacked by being inserted through a fitting mandrel 12 (FIG. 5) having a diameter of 35 mm, and the front part 22 of the mandrel can be removed with a screw. Breath 13 is
It consists of a cylindrical pressing portion 24, and a disk 26 fitted onto the mandrel 12 contacts the lower end of the pressing portion. The side ends of the felt polymer 10a are strongly compressed with the brace 13, and the disk 26 is fixed by screws or pins at the compressed position shown by the dashed line in FIG. If two screws or pins are not possible, a dowel bolt 30 may be installed between the discs 26,28. Through this compression process, the felt polymer 10a
The height of the laminate 14 is drastically reduced, and the height of the laminate 14 is about 50 cm. Further, the entire laminate 14 is impregnated with acrylic resin and dried, the front part 22 of the mandrel is removed, and the shaft 32 is screwed to the center of the disk 26. Finally, axis 32.34
After polishing the outer circumferential surface while rotating the laminate 14 while supporting it with Manufacture.

In order to fit this high-density felt cylindrical body to the conveying roller made of an aluminum profile, the inner diameter of the cylindrical body is set to be the same or slightly larger than the roller diameter, and the cylindrical body is pushed into the conveying roller. good.

Example 2 In order to produce a felt cylinder, density was determined from 30% aramid fiber (product name Kevlar 29, E, 1. manufactured by DuPont) and 70% carbon fiber (mainly product name Pyromex, manufactured by Toho Rayon Co., Ltd.). 0,2 g/cm3 and 1m thick
Use a felt sheet of size m. This sheet has a radius of 15mm
The band-shaped felt material 2 is formed by cutting the felt material into strips. The band-shaped felt material 2 is treated in the same manner as in Example 1, wrapped five times around the circumferential surface of the molding mandrel 8, polymerized into an annular shape, and further sewn around the inner periphery with a Kevlar filament reinforcing thread 11 to obtain an annular disc body. .

A large number of these annular disks are stacked by being inserted through a mounting rod 40 (FIG. 6) having a diameter of 35 mm. By pressing, the disk 42 is slid from the position indicated by the dashed line in FIG. 6 to the position indicated by the solid line, and the side edges of the felt laminate are strongly compressed by the pressing portion of the press.

Attach backup port 1-46 between discs 42 and 44,
When the disk 42 is fixed, the height of the felt laminate 48 is approximately 50 cm. Next, the mandrel 40 is pulled out from the laminate 48, and an acrylic resin of 11 cm is applied to the inner peripheral surface of the laminate.
After impregnation, a vibrator having approximately the same diameter as the mandrel is inserted, and a release agent is applied to the surface of the vibrator. The laminate 48 is dried in this state, and after drying, the retainer bolts 46 are removed and the surface of the laminate 48 is polished, resulting in a density of 0.5 g.
/cm3 to obtain a high-density felt cylinder with an outer diameter of 65 mm.

This felt cylindrical body can be fitted to the conveyance roll in the same way as the felt cylindrical body of Example 1 after the vibrator is pulled out.

Example 3 Large Fell 1 - In order to produce a cylindrical body, aramid fiber (trade name Kefler 29, E, 1. Manufactured by DuPont) 30
% and carbon tia fiber (mainly product name Pyromex, manufactured by Toho Rayon Co., Ltd.) 70% and density 0゜2 g/cm3
A felt sheet with a thickness of 1.5 mIn was used. This sheet is cut to a width of 50 m to form a band-shaped felt material 2. The negative side edge of the band-shaped felt material 2 is stretched by hand and curved almost uniformly. 5-shaped felt material 6
The inner side of the disk was wrapped three times around the circumferential surface of a molding mandrel 8 having a diameter of 1400 mm, polymerized into an annular shape, and the inner periphery was further sewn with reinforcing thread 11 of Kevlar filament to obtain an annular disk body.

In order to manufacture a felt roller 50 as shown in FIG. 7 from this annular disc body, a vibrator 58 with an appropriate detent formed on the outer circumferential surface is used as a fitting mandrel, and one end of the vibrator is attached to one disk [6]. Keep it fixed. A large number of annular disc bodies are inserted into the vibrator 58, the side ends of the felt laminate are strongly compressed by a press, and the other disc [6] is fixed by welding or bolting at the compressed position. During this compression, the annular disc body contracts somewhat inward in the radial direction, and the compressed laminate body 56 strongly tightens the peripheral surface of the mandrel, so that the vibrator 58 becomes integral with the compressed laminate body 56 by the aforementioned rotation stopper.

When the entire laminate is impregnated with acrylic resin and dried, and its surface is polished, it has a density of 0,5 g/Cm-' and an outer diameter of 1.
A 500 mm high density felt roller 50 is obtained.

When this felt roller 50 is used as a transport roll for a heated steel plate immediately after being tin-plated in a steel material processing factory, the steel plate can be slowly cooled, and when the laminated body 56 is worn out, the other disk 16 is removed and replaced. do it.

Example 4 In order to manufacture a felt roller 52 as shown in FIG. 8, a vibrator 18 having a detent 20 formed on its outer peripheral surface is used as a fitting mandrel. A large number of annular discs obtained in Example 1 were inserted into the vibrator 18 having an outer diameter of 76 mm and an inner diameter of 65 mm,
Compression processing is performed in the same manner as in Example 1. During this compression, the annular disk body contracts somewhat inward in the radial direction, and the compressed laminate 54 strongly tightens the peripheral surface of the mandrel, so that the vibrator 18 is integrated with the compressed laminate 54 by the detent 20. Further, the entire laminate 54 is impregnated with an acrylic resin and dried, the surface of the laminate is polished, and both disks are removed to obtain a high-density felt roller 52 with a density of 5 gicm3 and an outer diameter of 100 mm. .

This felt roller 52 is integrated with the vibrator 18,
Can be used as is as a drive roller, conveyance roller, etc.
The work of fitting a separate vibrator to the roller can be omitted. Although the detent 20 is a protrusion in the axial direction in FIG. 8, the protrusion may be replaced by a simple protrusion or embossing on the entire outer peripheral surface.

(Effects of the Invention) In the method for manufacturing a felt cylindrical body according to the present invention, a plurality of annular disc bodies each having an interval of one inch sewn with supplementary threads along the inner periphery are used, and these are inserted through a fitting mandrel. Because it is compressed, it is more economical than cutting felt sheets into disk shapes because no cut felt waste is produced. In the method of the present invention, when a large number of thin annular felt disks are inserted through a forming body rod and compressed from the side edges with a press, even if the compression force is quite strong, the center part spreads out radially, forming a barrel-shaped stack. Because it does not form a body and becomes a completely cylindrical shape,
It is suitable as a transport roll for surface-treated steel sheets or aluminum profiles, and has excellent durability as a transport roll even in high-temperature operating environments. When the cylindrical body manufactured by the present invention is fitted onto a conveyor roll, it has a high density and a homogeneous surface, so there is little damage to the surface of the surface-treated steel plate or aluminum profile heated at high temperature, and it is durable. The quality is also excellent.

[Brief explanation of drawings]

Fig. 1 is a plan view of the band-shaped felt material used in the present invention, Fig.
The figure is a partial side view of a pair of conical rollers used to curve the band-shaped felt material, Figure 3 is a side view showing the process of winding the spiral felt material, and Figure 4 is a side view showing the process of winding the spiral felt material. A plan view of an annular disk body, FIG. 5 is a vertical cross-sectional view showing the compression step in the method of the present invention, FIG. 6 is a side view showing another manufacturing process of the felt cylinder, and FIG. 7 is an example of a felt roller. The side view and FIG. 8 are perspective views showing another example of the felt roller. 2... Belt-shaped felt material, 6... Spiral felt material, 8... Molding mandrel, 10... Annular disk body, 11.
... Reinforcement system, 12 ... Fitting bodyguard, 13 ... Press, 14 ... Compression laminate.

Claims (2)

[Claims] 1. Using felt material cut into strips from a felt sheet, one side edge of this strip-shaped felt material is stretched and curved almost uniformly, the obtained spiral felt material is wrapped around a molding bodyguard several times and polymerized into a ring shape. In this state, it is removed from the mandrel and sewn in a ring shape along the inner periphery of the annular disc body with reinforcing thread,
A large number of these disc bodies are inserted into the fitting body rod and stacked, and the felt laminate is strongly compressed from the side edges, and the inner peripheral surface and the entire laminate is impregnated with resin and dried, or both fixed discs are A method for manufacturing a high-density felt cylindrical body that retains its shape by attaching it. 2. A thin annular disk made of felt, which is made by wrapping felt material several times around a molded bodyguard, polymerizing it into an annular shape, and sewing it in an annular shape with reinforcing thread along the inner periphery.