JP2873657B2 - Continuous strip processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous strip processing apparatus, and more particularly to a measure for preventing a failure caused by a connection between a trailing end of a preceding strip and a leading end of a succeeding strip connected by a joiner device.

[0002]

2. Description of the Related Art In a continuous strip processing apparatus,
For the purpose of improving productivity and increasing product yield, the rear end of the preceding strip and the front end of the succeeding strip are connected by a joiner device so that a heating furnace for heat treatment is passed through. As a method of connecting the strip, a welding method, a biting method, and the like are known (for example, Japanese Patent Publication No. 51-2).
No. 1503). However, in any of the methods, strip dust or the like is generated from the connection portion, and if the scrap adheres to a roll constituting a subsequent transport path, the roll itself is damaged or the strip surface is scratched. The degree of this damage increases when a dummy strip made of stainless steel or the like is connected to the strip to be processed in order to adjust the heating furnace using the dummy strip before starting the continuous processing. In addition, as for before and after the heating furnace, the degree of damage is greater on the outlet side of the heating furnace where the material softens.

In order to solve this problem, there has been provided a taping device for attaching a tape to a connecting portion of a strip (for example, Japanese Patent Application Laid-Open No. Hei 4-91821). This taping device is placed in a processing line between a joiner device and a heating furnace, and the upper and lower surfaces before and after the connecting portion of the strip are fixed by a clamp device, and a tape is applied over the entire upper and lower surfaces of the connecting portion. For this tape, a polymer material is used.

[0004]

However, the continuous processing apparatus for strips such as aluminum has a problem that welding is not easy as compared with the steel strip. Further, in a heating furnace in which a coating process is performed on an aluminum strip, the furnace temperature is not so high as 200 to 300 ° C., and a tape made of a polymer material has a heat resistance temperature of 350 ° C.
There is no problem because it is about ° C. However, in a heating furnace that performs continuous annealing of aluminum, the furnace temperature is 500 to 60.
Since the temperature is as high as 0 ° C., taping is not actually performed, and no measures are taken against roll damage due to strip debris and the like, and occurrence of scratches on the strip surface.
Further, even in the case of performing a heat treatment at 300 ° C. or less, the strip surface after the heat treatment is vulnerable to a pressing scratch,
There is an increasing demand for taking measures to prevent pressing damage after heat treatment.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a continuous processing of strips which can prevent the occurrence of surface flaws caused by the connection portion of the strip which is processed at any temperature and also prevent the roll from being damaged. It is to provide a device.

[0006]

According to the present invention, there is provided a heating furnace for performing heat treatment on a strip, and a joiner device for connecting a rear end of a preceding strip and a front end of a succeeding strip at an entrance side of the heating furnace. In the continuous strip processing apparatus, a device for laminating a film from both upper and lower surfaces with respect to the connection portion of the strip is provided on the outlet side of the heating furnace.

[0007]

FIG. 1 is a diagram showing a processing line of a continuous processing apparatus for strips, particularly, aluminum strips according to the present invention. The strip wound on the pay-out reel 11 includes relay rolls 12 and 13, a joiner device 14, a relay roll 15, an entry accumulator 16, and a relay roll 1.
7, 28, 19-continuous annealing furnace 20-laminating apparatus 21
-Relay rolls 22, 23, 24-Discharge accumulator 2
5--Wound on the take-up reel 28 through the route of the relay rolls 26 and 27.

[0008] The joiner device 14 and the continuous annealing furnace 20
Any device used so far may be used. In the continuous annealing furnace 20, the strip is continuously supplied, whereas in the joiner device 14, the strip needs to be stopped. For this reason, the entrance accumulator 1 is provided on the entrance side and the exit side of the continuous annealing furnace 20, respectively.
6. Discharge accumulator 25 is arranged so that strip supply to continuous annealing furnace 20 can be continued even when supply of strip to entry accumulator 16 is stopped. Such an entrance accumulator 16 and an exit accumulator 25 can be realized by vertically moving a roll (for example, an upper roll) for reversing the direction of the strip, and the specific configuration and operation are as follows. Description is omitted because it is well known.

The main feature of the present invention is that a laminating apparatus 21 is provided on the outlet side of the continuous annealing furnace 20. The laminating device 21 is a device that covers the connecting portion of the strip connected by the joiner device 14 and the upper and lower surfaces before and after the connecting portion with the protective film 30, and the coating operation is performed on the moving strip.

The continuous processing operation is performed as follows.
In the joiner device 14, when the trailing end of the strip is detected, the work of connecting the leading end of the succeeding strip to the trailing end in a state where the feeding of the strip is stopped is performed.
When the connection operation in the joiner device 14 is completed, the strip feeding is restarted. After that, the connection portion of the strip enters the continuous annealing furnace 20, passes through the heating zone, the slow cooling zone, and the air cooling zone, and exits from the continuous annealing furnace 20 at a temperature of about 100 ° C.
It has become.

By the way, when the connection portion is made of aluminum, if it is assumed that the joint is completely annealed in the continuous annealing furnace 20,
The hardness of the aluminum material is softened to about Hv100 or less, and when scraped together, strip dust and burrs are easily generated. Further, as described above, when a stainless steel dummy strip is connected instead of the aluminum strip prior to the start of the continuous processing or the change of the furnace conditions, the connection portion that has passed through the continuous annealing furnace is softened only on the aluminum side.
For this reason, a large number of strip scraps and burrs are generated on the aluminum side by the stainless side edge. This is because there is a large difference between the hardness of stainless steel being about Hv200 and the hardness of aluminum material being about Hv100 or less.

[0012] Then, the strip debris and burrs generated in this way may strike against the subsequent roll surface,
As described above, the strip debris that bites in and is generated on the roll surface causes scratches on the strip surface. In particular, the roll of the outlet-side accumulator 25 is usually a rubber-based lining roll, and the above problem is likely to occur.

On the other hand, in the present invention, a laminating device 21 is disposed on the exit side of the continuous annealing furnace 20, and the laminating device 21 is connected by bonding or welding the protective films 30 to the upper and lower surfaces of the connecting portion of the strip. Cover the part. Examples of the material of the protective film 30 include polyethylene, polyethylene terephthalate, and vinyl chloride. The laminating apparatus 21 operates when a connection portion of the strip is detected by a detector arranged in front of the laminating apparatus. In the detection of the connecting portion of the strip, usually, a gap is formed in the connecting portion of the strip, or a hole is forcibly formed. Therefore, these may be detected by a photo sensor or the like.

The laminating apparatus 21 covers the strip film adhering to the periphery of the connection portion and the burrs generated at the connection portion with the protective film 30. Thus, it is possible to prevent the shavings of the strip joint from adhering to the rolls after the continuous annealing furnace 20 or being damaged by burrs. Therefore, damage to the strip surface can be prevented. Further, this prevention effect is exhibited even when the heating temperature in the continuous annealing furnace 20 is high.

FIG. 2 shows an example in which the present invention is applied to a continuous coating line for strip made of aluminum. In this continuous coating line, a coating device 40 is arranged between the entrance accumulator 16 and the heating furnace 50. In the coating device 40, coating is performed on both the upper and lower surfaces of the strip by the coating machines 41 and 42. The coated strip is baked in a heating furnace 50. The laminating apparatus 21 is the same as that described with reference to FIG. 1, and the description of the operation and effect will be omitted.

In the present invention, the target strip is not limited to aluminum, and the present invention can be applied to a continuous strip processing apparatus made of other metals.

[0017]

As described above, according to the present invention, the connecting portion of the strip is covered with the protective film on the exit side of the heating furnace, so that strip waste caused by the connection can be formed on any strip. It is possible to prevent roll damage and strip surface damage due to burrs.

[Brief description of the drawings]

FIG. 1 is a diagram showing a processing line of a continuous strip processing apparatus to which the present invention is applied.

FIG. 2 is a diagram showing a line when the present invention is applied to a continuous coating line for strip.

[Explanation of symbols]

11 Reel reels 12, 13, 15, 18, 19, 22, 23, 24, 2
6, 27 Relay roll 14 Joiner device 16 Inlet accumulator 20 Continuous annealing furnace 21 Laminating device 25 Outlet accumulator 28 Take-up reel 30 Protective film 40 Coating device 41, 42 Coating machine 50 Heating furnace

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B21C 47/00 B65H 21/00

Claims (1)

(57) [Claims] 1. A continuous strip processing apparatus comprising: a heating furnace for performing a heat treatment on a strip; and a joiner device for connecting a rear end of a preceding strip and a front end of a succeeding strip on an entrance side of the heating furnace. An apparatus for continuously processing a strip, wherein an apparatus for laminating a film from both upper and lower surfaces with respect to the connection portion of the strip is provided on the outlet side of the heating furnace.