JPH0313458Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to felt tubes that are easy to manufacture from small diameters to large diameters, and are suitable for use in conveying rolls for heated aluminum extruded shapes. Regarding tube.

(Prior art) In extrusion processing of aluminum or its alloy, an extrusion tool is used to form a heated billet under pressure, and the extruded shape that comes out of the die of the extrusion tool remains in a heated state. The aluminum is then transported to post-processing equipment to form the desired aluminum product.
For this purpose, the aluminum processing factory uses a driving conveyor,
Conveyors and lifting machines such as walking beam cooling tables and line-out tables are installed, and the extruded shape immediately after it comes out of the die is first supported by multiple conveyor rolls, and then transferred to the designated conveyor or post-processing equipment. send. Immediately after the extruded shape comes out of the die, it is at a high temperature close to the melting point of aluminum (660℃).
Direct contact with the roll surface will damage the surface. For this purpose, a felt tube made of heat-resistant fiber is fitted on the roll surface for cushioning.

(Problem that the invention aims to solve) Conventional felt tubes are manufactured by directly needle-punching the fiber web into a cylindrical shape using a special machine. The variation is low and the unit price is high. In addition, with the type of tube in which a heat-shrinkable fiber is inserted into a cylindrical part and is fitted and fixed to the transport roll, once it is fixed to the transport roll, it cannot be removed without cutting it open, and not only is it impossible to replace parts, but the inside is hard. It becomes so difficult to judge the appropriate time for replacement. If the diameter of the felt tube is limited to several types, a gap may be created between the felt tube and the conveying roll at the time of attachment, or the conveying roll itself may need to be deformed in some cases.

(Means for Solving the Problems) As a result of various studies on the above-mentioned problems regarding conventional felt tubes, the inventor of the present invention found that cutting a felt sheet into strips and then rolling them into a tube can be done relatively inexpensively and with a small size. We have discovered that it is possible to manufacture felt tubes from large diameters to large diameters. Therefore, the felt tube of this invention has various uses, not only as a conveyor roll for heated aluminum extrusions, but also as a polishing roll or as a substitute for a rubber roll.

The felt tube according to this invention is manufactured by sequentially winding belt-shaped felt materials 2 and 4 around a round core 6, usually made of iron, as illustrated in FIG. The felt materials 2 and 4 are first made by needle-punching various types of fiber webs into a sheet and then cutting them into strips of a predetermined width. Belt-shaped felt material 2,
Winding No. 4 can be done in the opposite direction as shown in Figure 1.
They may be oriented in the same direction as shown in the figure, but in general, the fracture strength will be higher if they are oriented in opposite directions. During this winding,
As shown in the figure, the both side edges of the band-shaped felt materials 2 and 4 are brought into close contact with each other, and care is taken not to overlap the side edges. The diameter of the tube 8 of this invention is determined according to the diameter of the round core 6, and can be molded to any size with a diameter of usually 5 mm or more. As shown in FIG. 2, this reduced-plan tube 8 has two layers: a felt inner cylinder part 10 and a felt outer cylinder part 12. It is also possible to have more than one layer. The felt outer cylinder part 12 is directly or indirectly adhered to the outer peripheral surface of the felt inner cylinder part 10, and this adhesion is performed using a liquid adhesive 14 applied to the outer peripheral surface of the felt inner cylinder part 10, a double-sided adhesive tape, or the like.

The fibers constituting the felt materials 2 and 4 may be appropriately selected depending on the purpose, and one or more types of natural fibers, synthetic fibers, or a mixture of both may be used. As shown in FIG. 4, when the tube 8 is fitted to the conveyor roll 22 of the heated aluminum extruded shape 20 coming out of the die 18, both the inner cylindrical part 10 and the outer cylindrical part 12 are heat-resistant. Composed of sexual fibers. This heat-resistant fiber is, for example, aramid fiber alone or a blend of aramid fiber and carbon fiber, etc. Aramid fibers include paraphenylene terephthalamide fiber and metaphenylene isophthalamide fiber, etc. The former is preferable, and the latter can be used in the inner cylinder portion 10 or at relatively low temperature locations. The carbon fibers used together include
It also includes 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, for conveyance of an aluminum-based extruded shape in a low temperature state, tubes made of polyester fibers may be fitted to the conveyance roll for both felt materials, and a tube made of wool may be used for the polishing roll.

(Function) The felt tube 8 of this invention can have any size with a diameter of 5 mm or more, and can have a length of several meters, since the band-shaped felt materials 2 and 4 are sequentially wound around the round core 6 and bonded to each other. Even if the tube is twisted, it is relatively easy to manufacture and hardly deforms even if the tube is twisted. As shown in FIG. 5, in order to fit the tube 8 to the transport roll 22, it is sufficient to set the inner diameter of the inner cylinder part 10 to be slightly smaller than the diameter of the roll, and simply push the tube into the transport roll 22. . When the tube 8 of this invention is divided into three parts and fitted together, the wear of the tube 8 is reduced to parts 8a, 8b, and 8.
Since the parts 8b and 8b are uneven and the part 8b is usually worn the most, it is only necessary to pull out the part 8a or 8c and replace only the part 8b in a complicated manner.

Although the tube 8 of this invention can be used in a wide range of fields, since the connecting line 24 (Fig. 1) of the band-shaped felt material 4 is formed diagonally on the outer circumferential surface of the tube, it cannot be used in fields affected by this connecting line. It is better not to use it.

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

Example 1 In order to manufacture a felt tube 8 as shown in FIG. 2, a band-shaped felt material 2 having a width of 50 mm is wound left-handed around a round core 6 having a diameter of 35 mm to form an inner cylindrical portion 10. The felt material 2 consists of a felt sheet with a density of 0.1 to 0.3 g/cm ³ and a thickness of 1.5 mm, which has a base fabric 16 of plain woven aramid fiber on the surface, and the sheet is made of aramid fiber (trade name: Cornex, Teijinsha Co., Ltd.). made)
Manufactured from. Next, silicone rubber with a solid content of 100% is applied as a liquid adhesive 14 to the outer peripheral surface of the inner cylinder part 10.
After applying g/ ^m2 , strip felt material 4 with a width of 75 mm.
The outer cylindrical portion 12 is formed by winding it right-handedly. The felt material 4 consists of a felt sheet with a density of 0.3 g/cm ³ and a thickness of 5 mm, which has a base cloth 24 of plain woven aramid fiber in the center, and the sheet is made of aramid fiber (trade name: Kevlar 29, manufactured by EI Dupont). ) and 70% carbon fiber (mainly manufactured by Toho Rayon Co., Ltd. under the trade name Pyromex). After drying the adhesive 14 in a suitable dryer, the round core 6 is pulled out to obtain a tube 8 having an inner diameter of 35 mm and an outer diameter of 47 mm.

When the tube 8 is fixed with the liquid adhesive 14, the base fabric 16 is positioned on the outer peripheral surface of the felt inner cylinder part 10, and the adhesive 14 does not penetrate into the inner cylinder part.
This is preferred because it prevents solidification. The tube 8 is cut into three pieces each having a length of, for example, 15 cm. As shown in FIG. 5, in order to fit into the conveyor roll 22 having a diameter of 36 mm, it is only necessary to push it into the conveyor roll 22. Wear of the tube 8 is mainly concentrated in the portion 8b, so the wear of the tube 8 is
When b is worn down to a predetermined thickness, the portion 8a or 8c
All you have to do is pull it out once and replace only part 8b.

Example 2 In order to manufacture a felt tube 26 as shown in FIG. 3, a band-shaped felt material 2 with a width of 20 mm is wound counterclockwise around a round core 6 with a diameter of 20 mm. Felt material 2
consists of a felt sheet with a density of 2.0 g/cm ³ and a thickness of 1.5 mm, which sheet is manufactured from aramid fibers (trade name Cornex). Next, after interposing the double-sided adhesive tape 27 on the outer peripheral surface of the inner cylinder part 10,
The outer cylindrical portion 12 is formed by winding the band-shaped felt material 4 having a diameter of mm in a right-handed manner. The felt material 4 has a base fabric 24 made of plain woven aramid fiber in the center and has a density of 3.0 g/
It consists of a felt sheet measuring cm ³ and 5 mm thick, which is the same aramid fiber as described above. Finally, when the round core 6 is pulled out, a tube 26 having an inner diameter of 20 mm and an outer diameter of 32 mm is obtained.

This tube 26 can be cut into a length of 30 cm, for example, and can be fitted onto a conveying roll 22 having a diameter of 21 mm, which was impossible with conventional felt tubes.

Example 3 In order to manufacture a felt tube 28 as shown in FIG. 7, a band-shaped felt material 2 with a width of 50 mm is wound clockwise around a round core 6 with a diameter of 76 mm to form an inner cylindrical portion 30, and an adhesive is further applied. The impregnated gauze 32 is wound around the right side and dried. Felt material 2 has a density of 2.0g/cm ³
It consists of a felt sheet with a thickness of 2 mm, and the sheet is manufactured from polyester fiber (for example, Toray Tetron, trade name). On the other hand, gauze 32 is 40mm wide and 25
g/cm ³ of vinylon fiber, passed through a bath of liquid adhesive and then squeezed with a roll. After drying the adhesive, a liquid adhesive is further applied to the outer circumferential surface of the gauze 32, and a band-shaped felt material 4 having a width of 100 mm is wound clockwise to form an outer cylindrical portion 34. The felt material 4 consists of a felt sheet having a density of 2.2 g/cm ³ and a thickness of 7 mm, and the sheet is made of the same polyester fiber as described above. After the adhesive has dried, the round core 6 is pulled out to obtain a tube 28 with an inner diameter of 76 mm.

This tube 28 can be stored in a dry state by wrapping gauze 32 around the inner cylinder part 30, and may be wrapped with an outer cylinder part 34 made of arbitrary fibers when used. In the tube 28, when wrapping the outer cylinder part 34, the gauze 32 is
Since the liquid adhesive is applied to the outer circumferential surface of the gauze 32, the adhesive does not penetrate into the inside from the gauze 32 and does not solidify the inner cylinder portion 30, which is preferable. This tube 28 is cut into three pieces each having a length of, for example, 15 cm. In order to fit into the transport roll used at low temperatures, it is sufficient to simply push it into the transport roll. Wear of the tube 28 is mainly concentrated in the central portion, so when the central portion is worn down to a predetermined thickness, it is only necessary to pull out both end portions and replace only the central portion.

Example 4 As in Example 3, polyester fiber felt material 2 was wrapped around a round core having a diameter of 76 mm, and adhesive-impregnated gauze was further wrapped around it and dried. A liquid adhesive is applied to the outer peripheral surface of this gauze, and a band-shaped felt material 4 made of wool is wrapped around it to form an outer cylinder part. When the round core is pulled out after the glue has dried, a tube with wool on the outside is obtained.

This tube can be used as a polishing roll for final polishing of glass plates. Also, by changing the diameter of the round core, tubes with any inner diameter can be manufactured.

(Effects of the invention) The felt tube according to this invention uses a belt-shaped felt material made by needle-punching a fiber web into a sheet, and is different from the conventional felt tube that uses a special machine to sequentially wrap both belt-shaped felt materials around a round core. Tubes of any diameter can be manufactured easily. Therefore, the tube of this invention is
Product variations are high and unit prices are low.
It can be used for various purposes such as polishing rolls or as a substitute for rubber rolls. Furthermore, when the tube of this invention is fitted onto a conveyor roll, the surface of the extruded section heated at high temperature is hardly damaged. The tube of this invention can be attached by simply pushing it into the conveyor roll, and it is economically advantageous because it allows partial replacement. Furthermore, the inside does not become hard when installed, it is easy to determine when to replace the roll, and there is no need to deform the transport roll itself.

[Brief explanation of the drawing]

Figure 1 is a schematic side view for explaining the manufacturing process of the felt tube according to this invention, Figures 2 and 3 are cross-sectional views showing the tube of this invention, and Figure 4 is a diagram showing the tube of this invention. FIG. 5 is a schematic side view showing how the fitted conveyor rolls are used; FIG. 5 is a schematic front view showing how the tube of this invention is fitted to the conveyor rolls; FIG. 6 is a description of the manufacturing process of a modified example of this invention. FIG. 7 is a cross-sectional view showing the tube of FIG. 6. 2, 4... Band-shaped felt material, 6... Round core, 8...
...Felt tube, 10...Felt inner cylinder part,
12...Felt outer cylinder part, 14...Liquid adhesive,
16...Base fabric.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A tube formed by winding a band-shaped felt material around a round core of a predetermined diameter and then pulling it out,
It has at least two layers, an inner felt cylinder part and an outer felt cylinder part, which are wrapped with both side edges closely wrapped, and the felt outer cylinder part is directly or indirectly adhered to the outer peripheral surface of the felt inner cylinder part, and during this adhesion A felt tube for use in conveyor rolls, etc., characterized in that adhesive does not penetrate into the inner circumferential surface of the inner cylindrical portion of the felt, and when it is pulled out from the round core, it can be used alone to maintain its cylindrical shape. 2. The tube according to claim 1, wherein both the felt inner cylinder part and the felt outer cylinder part are made of heat-resistant fibers, and the tube is fitted to a conveyor roll made of an extruded aluminum profile. 3. The tube according to claim 1, wherein the felt belt of the outer felt cylinder is wound in the opposite direction to the felt belt of the inner cylinder.