JPH02251657A - High density felt cylinder and preparation thereof - Google Patents

Abstract

PURPOSE:To economically and rapidly provide a felt cylinder for fitting to a roll by laminating a spirally curved belt-like felt material sewed with a reinforcing thread along the inner side thereof into a cylinder-like shape, press- molding the laminated felt, subjecting the inner surface or all of the molded product to a resin processing process and subsequently abrading the outer surface of the processed product. CONSTITUTION:A felt sheet is cut into belt-like products, which are singly or plurally straight sewed with a reinforcing thread along one side of the product to form a moderately curved felt material, followed by passing the felt material through a point between a pair of conical rolls to prepare a spiral felt material. The formed spiral felt material is wound on a pipe suitably equipped with a winding stop and fixed disks at both the ends thereof on the outer surface to laminate the felt material into a cylindrical shape and subsequently press-molded. The inner surface or all of the formed cylindrical product is processed with a resin and the outer surface of the product is abraded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a high-density felt cylindrical body that can be used in diameters from small to large, and is used for conveying rollers for aluminum shapes, polishing rolls, etc. The present invention relates to a cylindrical body and a method for manufacturing the same.

(Prior Art) For example, in the extrusion process of aluminum, the extruded shape material ejected from the die of the extrusion tool is conveyed in a heated state to post-processing equipment to form a desired aluminum product. For this purpose, aluminum processing plants are equipped with conveyors and lifting machines such as drive conveyors, walking beam cooling tables, and line-out tables. After this, it is sent to a predetermined conveyor or post-processing equipment. Immediately after the extruded shape comes out of the die, it is at a high temperature close to the melting point of aluminum (660° C.), so if it comes into direct contact with the roller surface, the surface will be damaged.

For this purpose, a felt tube made of heat-resistant fiber is fitted onto the roller surface for cushioning. On the other hand, felt polishing rolls are commonly used for polishing plate glass, etc., and conventionally, they are usually manufactured by laminating felt pieces cut into disk shapes from felt sheets.

(Problems to be Solved by the Invention) Conventional felt tubes are produced by directly needle-punching the fiber web into a cylindrical shape using a special machine, so it cannot be manufactured unless the shaft dimensions are unique to the needle-punching machine. The variety is low and the unit price is high. Furthermore, if heat-shrinkable fibers are inserted into a cylindrical shape and are fitted and fixed to the conveyor roller, it is necessary to cut open to remove the cylindrical body, and not only is it impossible to partially replace it, but the inside is hard, so it is difficult to determine when to replace it properly. difficult to judge. On the other hand, manufacturing a laminated felt cylindrical body by cutting a felt sheet into disk shapes is uneconomical because a large amount of cut felt waste is generated from the sheet, and the cost of disposing of the felt waste is also required.

The present inventor has already proposed Utility Application No. 140850/1983 in order to improve the above-mentioned problems, and further, in the present invention, a high-density felt material suitable for use as a conveying roller or polishing roll for aluminum profiles, etc. The object of the present invention is to provide a cylindrical body and a method for manufacturing the same.

(Means for Solving the Problems) To achieve the above object, in order to manufacture a high-density felt cylinder according to the present invention, as shown in FIG. 1, a felt sheet (not shown) is cut into strips. Using the felt material 2, first, a reinforcing thread 4 is sewn in a straight line along one side of the felt material using a sewing machine. The band-shaped felt material 2 is made by integrating various fiber webs by needle punching.
The felt material may be cut from a felt sheet having a thickness of ~4 mm, and a plurality of sheets may be polymerized as desired, or the felt material may be sewn vertically with a sewing machine to a predetermined length. The fibers constituting the felt material 2 may be appropriately selected depending on the purpose.
A seed or two or more natural fibers.

Use synthetic fibers or a mixture of both. For example, for conveyor rollers for aluminum profiles, aramid fibers, which are heat-resistant fibers, are used alone or mixed with aramid fibers and carbon fibers, etc., and aramid fibers include rose phenylene terephthalamide fibers and metaphenylene isophthalamide fibers.
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, the felt material 2 may be made of polyester fibers for transporting aluminum shapes in a low temperature state, and a cylindrical body made of wool or the like may be used for the polishing roll.

The reinforcing thread 4 is a high-strength thread that does not break even during compression work, such as Kevlar filament (trade name).The reinforcing thread 4 is located close to the long side of the felt strip 2 at However, when cutting vertical grooves on the circumferential surface of the cylindrical body after molding, it is necessary to set the sewing position so as not to cut the reinforcing thread 4 during cutting.The horizontal curvature of the felt strip 2 is If the sewing pitch of the reinforcing thread 4 is increased and the thread tension is increased, the sewing becomes tighter, so the sewing pitch and thread tension are adjusted according to the desired cylinder diameter.

When the reinforcing thread 4 is sewn in a straight line, a low melting point resin film 3 or a nonwoven fabric may be simultaneously sewn onto one side of the band-shaped felt material 2, as shown in FIG.

This film 3 or nonwoven fabric needs to have a lower melting point than the fibers constituting the felt material 2, and has the property of fusing the felt material 2 when heated. Therefore, the film 3 or nonwoven fabric is polyethylene.

It is made of a low melting point resin such as polypropylene or EVA, and if the felt material is made of high temperature heat resistant fiber, polyester or the like can also be used. This film 3 is produced by laminating felt materials and compressing them, then heating them at a temperature higher than the melting point of the low melting point resin to melt and bond the low melting point resin.
The obtained laminate is maintained in a cylindrical shape. The film 3 may be hemmed to one side of the band-shaped felt material 2 as shown in the figure, or it may be simply sewn with a car number reinforcing thread 4.

The felt material 2 horizontally curved with the reinforcing thread 4 is passed between a pair of conical rollers 5, 5 (FIG. 2) and curved flat and almost uniformly to form a spiral felt material 6 as shown in FIG. Shape. The helical felt material 6 is wound around a suitable mandrel 8 and laminated, as illustrated in FIG. 4, and is strongly compressed by a brace 12 from the side end of this felt laminate 10. During this winding, the inner side of the spiral felt material 6 is wrapped around the mandrel 8.
The height of the felt laminate 10 is drastically reduced by compression processing. The compressed laminate 14 is maintained in a compressed state by appropriate fixing means,
The inner peripheral surface or the entire surface is impregnated with resin and dried. The resin used in resin processing is selected depending on the purpose of the cylindrical body.
Use a heat-resistant epoxy, acrylic, or inorganic adhesive.

During this compression, the helical felt material 6 contracts somewhat inward in the radial direction, and in the compressed laminate, the circumferential surface of the mandrel is strongly tightened, so that it is prevented from rotating on the circumferential surface of the pipe 18 (Fig. 7), which is the mandrel. 20, a felt roller is obtained in which the pipe is fixed to the compacted laminate. Also, instead of resin processing, the fixed disk 21.21 can be used in a compressed state.
If (Fig. 8) is welded or bolted, the resin processing described above becomes unnecessary.

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 the felt cylinder of the present invention is determined according to the outer diameter of the mandrel 8, and is generally about 35 m in diameter.
By the method of the present invention, which can be manufactured up to dimensions of around 3 m to 3 m, for example, a felt cylinder with a density of 0.3 to 0°81/c+++' can be obtained from a felt sheet with a density of 0.05 g/c shoulder 3. , resulting in a high-density felt that has a wide range of uses.

(Function) In the manufacturing method of the felt cylinder according to the present invention, the reinforcing thread 4 is sewn along one side of the felt strip 2, and the elastic recovery of the sewn reinforcing thread 4 causes the felt cylindrical strip 2 to One side contracts in a wavy manner, creating a horizontal curvature as shown by the dashed line in FIG. The gently curved band-shaped felt material 2 curves almost evenly to become the spiral felt material 6, but by appropriately adjusting the sewing pitch of the reinforcing thread 4 and the tension of the thread, it can be curved to the desired cylindrical diameter. becomes possible. Due to the presence of the reinforcing thread 4 sewn to one side of the spiral felt material 6, when strongly compressed by the breather 12, the felt laminate 10 does not expand outward in the radial direction and deform in the center, and can be accurately Cylindrical compressed laminate 1
It becomes 4. In this compressed laminate, the compressed state is maintained as it is by an appropriate fixing means, or by melting and adhesion with a low melting point resin film 3 sewn at the same time, or by impregnating the inner peripheral surface or the whole with resin and drying. To maintain an accurate cylindrical shape even when a fixing means is removed.

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

Example 1 In order to manufacture a high-density felt cylinder, a material with a density of 0.0 made of aramid fiber (trade name: Conex, manufactured by Konjinsha) was used.
A felt sheet with a thickness of 1.5 mm and a weight of 5 g/elf' is used. This sheet is cut to a width of 15 mm to form a band-shaped felt material 2, and along one side of the felt material 2, a reinforcing thread 4 of Kevlar filament (trade name, E, 1. manufactured by DuPont) is sewn in a straight line using a sewing machine. By sewing the reinforcing thread 4, the band-shaped felt material 2 is curved almost evenly in the horizontal direction, and by passing it between a pair of conical rollers 5, 5 (Fig. 2), it is bent as shown in Fig. 3. To obtain a spiral felt material 6 which is flat and curved almost uniformly.

The obtained spiral felt material 6 has an inner side with a diameter of 35 m.
The front part 22 of the mandrel can be removed with a screw. The press 12 has a cylindrical pressing section 2
4, and a disk 26 fitted on the mandrel 8 comes into contact with the lower end of the press.

Strongly compress the side edges of the felt laminate 10 with a press 12,
The disk 26 is fixed by screws or bolts in the compressed position shown by the dashed line in FIG. If it is not possible to fasten with the second screw or bolt, you can install a retaining bolt 30 between the discs 26 and 28. By this compression process, the height of the felt laminate 10 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, while rotating the stacked body 14 while supporting it with the shafts 32 and 34, the outer peripheral surface is polished, and then the mandrel 8 and the disk 26 are polished.
．． By removing 28, a high-density felt cylinder with a density of 0.5 g/C1' and an outer diameter of 60 mm is produced.

As shown in FIG. 9, in order to fit the high-density felt cylindrical body to the conveying roller 16, 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 It is only necessary to push the paper onto the conveying roller 16. Each conveyance roller 16 supports a heated aluminum extrusion section 38 that has come out of the die 36 . When this felt cylindrical body 8 is fitted into the conveying roller 16 in three parts, for example, the abrasion of the cylindrical body is uneven in the center and left and right parts, and since the center part is usually worn the most, the left Or you can pull out the right part and replace only the center part.

Example 2 In order to manufacture a high-density felt cylindrical body, a material with a density of 0.0 made of aramid fiber (trade name: Conex, manufactured by Konjinsha) was used.
51/c+e3 with a thickness of 1.5 mm, the sheet was cut into a width of 15 mm to obtain a strip of felt material 2.
form. Next, as shown in FIG. 6, while covering one side of the strip-shaped felt material 2 with a polypropylene film 3,
Edge stitching is performed using reinforcing thread 4 of Kevlar filament (trade name, E, 1. manufactured by DuPont). The material is further processed in the same manner as in Example 1 to obtain a flat, substantially uniformly curved spiral felt material 6.

The obtained spiral felt material 6 has a mandrel 8 in the same manner as in Example 1.
(Fig. 4) and are laminated, and the mandrel is coated with a mold release agent. Next, the side edges of the felt laminate 10 are compressed by the press 12, and the disk 26 is fixed by screws or pins in this compressed position. In this compressed state, the laminate 14 is heated to about 170° C. to melt and adhere the polypropylene resin film 3, so that the laminate 14 maintains its cylindrical shape after cooling.The outer periphery of the laminate 14 After polishing the surface, the disks 26 and 28 are removed and the mandrel 8 is pulled out to obtain a high-density felt cylindrical body with a density of 0.51/cm3 and an outer diameter of 60 mm, and the cylindrical body can be used in the same manner as in Example 1. Can be used for

Example 3 To produce a high-density felt cylinder, 30% aramid fiber (trade name Kevlar 29, E, 1. manufactured by DuPont) was used.
A felt sheet with a density of 0.2 g/cts and a thickness of 1 mm is used.

This sheet is sewn with reinforcing threads 4 and then treated in the same manner as in Example 1 to obtain a flat, horizontally curved spiral felt material with a width of 20 mm.

The obtained spiral felt material has an inner side with a diameter of 35 mm.
Wrap it around the circumferential surface of the 0-long mandrel 40 (FIG. 5) as closely as possible. By pressing, the disk 42 is slid from the position indicated by the dashed line in FIG. 5 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. When the stud bolts 46 are installed between the disks 42 and 44 and the disks 42 are 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 is applied to the inner peripheral surface of the laminate.
After impregnation, a pipe with approximately the same diameter as the mandrel is inserted, and a mold release agent is applied to the surface of the pipe. 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 conveying roll in the same manner as the felt cylindrical body of Example 1 after the pipe is pulled out.

Example 4 Made of 100% wool felt sheet, 1mm thick and 3mm wide.
Cut a 0mm strip of felt material. Two pieces of this are superimposed, a reinforcing thread is sewn in the same way as in Example 1, and the fabric is curved in the horizontal direction. Next, in the same manner as in Example 2, a spiral felt material is wound around a mandrel having a diameter of 50 mm to obtain a high-density felt cylinder made of wool.

This felt cylindrical body can be used for finishing polishing of glass plates as a polishing roll.

Example 5 In order to manufacture a high-density felt roller 52 as shown in FIG. 7, a pipe 18 with a rotation stopper 20 formed on the outer peripheral surface
(Fig. 7) is used as the mandrel.

A spiral felt material similar to that in Example 1 is wrapped around a pipe 18 having an outer diameter of 76 mm and an inner diameter of 65 mm, and is subjected to compression treatment as in Example 1. During this compression, the helical felt material contracts somewhat inward in the radial direction, and the compressed laminate 54 strongly tightens the peripheral surface of the mandrel, so that the pipe 18 becomes integral with the compressed laminate 54 by the detent 20. Furthermore, the laminate 54
The entire surface of the laminate is impregnated with 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 0.5 tacts and an outer diameter of 100 mm.

This felt roller 52 is integrated with the pipe 18,
Can be used as is as a drive roller, conveyance roller, etc.
With this roller, the work of fitting a separate pipe can be omitted. Although the detent 20 is a protrusion in the axial direction in FIG. 7, the protrusion may be replaced by a simple protrusion or embossing on the entire outer peripheral surface.

Example 6 In order to manufacture a high-density felt roller 56 as shown in FIG. 8, a pipe 5 with an appropriate detent formed on the outer peripheral surface
8 is used as a mandrel, and one disk 21 is fixed to one end of the pipe. As in Example 1, after wrapping the spiral felt material, the side edges of the felt laminate are strongly compressed using a press, and the other disk 2 is pressed at the compressed position.
1 is fixed by welding or bolting. During this compression, the helical felt material contracts somewhat inward in the radial direction, and the compressed laminate 60 strongly tightens the circumferential surface of the mandrel, so that the pipe 58 becomes integral with the compressed laminate 60 due to the rotation prevention described above. When the surface of the laminate is polished, the density becomes 0.5 g/
A high-density felt roller 56 with an outer diameter of 100 mm is obtained.

This felt roller 56 can be used for the same purposes as in the fifth embodiment, and if the laminated body 60 becomes worn out, the other disk 21 can be removed and replaced.

(Effects of the Invention) In the method for manufacturing a felt cylinder according to the present invention, a belt-shaped felt material with reinforcing threads sewn along the sides is used, and after being curved into a spiral shape, it is wrapped around a mandrel and compressed.
Compared to conventional felt cylindrical bodies that use a dedicated machine, a cylindrical body with a desired diameter can be manufactured quickly and easily. The method of the present invention has a wide variety of felt cylindrical bodies obtained, and is economical because it does not produce cut felt waste compared to the case where felt sheets are cut into disk shapes.

When the cylindrical body of the present invention is fitted onto a conveyor roll, it has a high density and a homogeneous surface, so there is almost no damage to the surface of the aluminum profile heated at high temperature, and it has excellent durability. . Further, the felt cylindrical body of the present invention is suitable for use in polishing rolls, driving rollers, etc. because the felt fibers are oriented substantially in the radial direction.

[Brief explanation of drawings]

Fig. 1 is a plan view of the band-shaped felt material used in the present invention, Fig.
The figure shows a partial side view of a pair of conical rollers used to flatten a curved strip of felt material, FIG. 3 is a partial perspective view of a flat and almost evenly curved spiral felt material, and FIG.
The figure is a longitudinal cross-sectional view showing the compression step in the method of the present invention.
The figure is a side view showing another manufacturing process of the felt cylindrical body of the present invention, FIG. 6 is an enlarged sectional view showing a modified example of the strip-shaped felt material used in the present invention, and FIG. 7 is a high-density felt roller according to the present invention. FIG. 8 is a side view showing another example of the high-density felt roller according to the present invention, and FIG. 9 is a schematic side view showing how the conveying roller fitted with the cylindrical body of the present invention is used. It is a diagram. 2... Band-shaped felt material, 3... Low melting point resin film, 4... Reinforcing thread, 6... Spiral felt material, 8
... Mandrel, 10... Felt laminate, 12... Press, 14... Compression laminate, 16... Conveyance roller,
18... Cylindrical body, 20... Rotation stopper, 21.21...
・Fixed disk.

Claims (5)

[Claims] 1. Reinforcing threads are sewn along the inner side of the band-shaped felt material, and it is a felt cylindrical body made by laminating almost evenly curved spiral felt materials into a cylindrical shape and compression molding, and the inner peripheral surface or the whole is made of resin. A high-density felt cylindrical body that is processed and polished on its outer surface. 2. Reinforcing threads are sewn along the inner side of the felt strip, and the felt cylinder is made by wrapping almost evenly curved spiral felt material around a pipe and layering them for compression molding. A high-density felt roller with a rotation stopper, the entire surface is treated with resin, and the outer surface is polished. 3. Reinforcing threads are sewn along the inside edge of the strip of felt material, and it is a felt cylinder made by wrapping almost evenly curved spiral felt material around a pipe and stacking them for compression molding. A high-density felt roller that attaches and polishes the outer peripheral surface. 4. Using felt material cut into strips from a felt sheet, this strip-shaped felt material alone or multiple sheets are polymerized and reinforcing thread is sewn straight along one side of the felt material to obtain a gently curved strip-shaped felt material, and then After the felt material is flattened and curved almost uniformly to form a spiral felt material,
The felt laminate is wrapped around a suitable mandrel and laminated, 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 fixing disks are attached to retain the shape. A method for manufacturing a high-density felt cylinder. 5. Felt material cut into strips from a felt sheet is used, and a reinforcing thread is sewn in a straight line along one side of the felt material, and a low melting point resin film or nonwoven fabric is sewn at the same time. The felt material is formed into a flat and almost uniformly curved felt material in the form of a strip of felt material, and then the felt material is wound around an appropriate mandrel and laminated. A method for producing a high-density felt cylindrical body, in which the film or nonwoven fabric is melted and bonded by strongly compressing it and heating at a temperature higher than the melting point of the sewn film or nonwoven fabric, and then cooled to retain its shape.