JPS641960Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a roll deposit removal device and is used in the field of chemical surface treatment (hydrated oxide film treatment, chemical dissolution, etc.) of aluminum and other metal coils. .

(Prior art) Conventionally, when chemically processing a metal coil, the metal coil is guided into a processing tank by guide rolls installed inside and outside the processing tank, and guided into the processing solution in the processing tank. .

(Problem to be solved by the invention) For example, when an aluminum coil is subjected to a hydrated oxide film treatment in a neutral or basic treatment liquid, the hydrated oxide of aluminum that is dissolved and oxidized during the treatment
Al(OH) ₃ adheres to the circumferential surface of the roll due to the frictional force caused by the contact between the coil and the guide roll, and this adhesion can cause scratches, irregularities, etc. on the surface (or back surface) of the aluminum coil, and may deteriorate the product appearance. There was a problem that caused significant deterioration.

In addition to the above-mentioned hydrated oxide film treatment, chemical treatments for metal coils include various treatments such as degreasing and chemical dissolution.
In any of the treatments, the adhesion and accumulation of products such as oxides and dissolved substances on the peripheral surface of the roll is unavoidable, although there are differences in degree, resulting in the same problems as described above.

(Means for Solving the Problems) However, in this invention, a fluororesin coating is formed on the circumferential surface of a roll that guides a metal coil such as the aluminum coil, and the circumferential surface deposits are removed from the circumferential surface. A roll deposit removing device is constructed by attaching a removing tool.

As the roll, a conventionally used stainless steel roll, titanium roll, or the like is used, and a fluororesin coating is formed on the peripheral surface of the roll. This roll is installed in, outside, or in the middle of the processing liquid in the processing tank, but it is desirable that the bearing supporting the roll is configured to be outside the processing liquid.

Further, the removing tool may be a brush roll or a scraping plate, and in either case, the removing tool is attached so as to come into contact with the peripheral surface of the roll.

The brush roll is made of fluororesin, nylon,
It is constructed by planting synthetic resin fibers such as polypropylene, vegetable fibers, or animal fibers on the brush shaft. The scraping plate is made of felt or mat made of the same material as above. These materials are selected in consideration of the composition, temperature, etc. of the treatment liquid used in the chemical treatment.

(Function) As mentioned above, when a fluororesin coating is formed on the circumferential surface of the roll that guides the metal coil, since the fluororesin is non-adhesive, the adhesion strength of the product to the roll circumference is extremely low. can do. Then, when driving the roll, the removing tool is applied to the peripheral surface (in the case of a brush roll, the brush roll is brought into contact with the peripheral surface of the roll in a driven or non-driven state. (If the product is in contact with the roll, maintain the contact state as it is.), the product that was attached with a weak adhesion force will be completely removed from the roll circumferential surface.
As a result, it is possible to avoid damage to the product appearance to the metal coil due to impurity adhesion on the roll circumferential surface.

(Example) Next, an example in which this invention is applied to a hydrated oxide film treatment apparatus 1 for an aluminum coil C will be described.

Processing tank 2 is made of stainless steel SUS316
Then, put a 3% ammonia solution inside it and set the temperature to 93
It is filled with processing solution 3 kept at ℃. A driving roll 4 is installed on one outside side of the processing tank 2, and guide rolls 5,
6 and 7 are installed, and the aluminum coil C
After being sequentially introduced into the processing liquid 3 in the processing tank 2, it can be discharged to the outside.

The guide rolls 5, 6, and 7 have core rolls 5a, 6a, and 7a made of stainless steel SUS316, and fluororesin coating layers 5b, 6b, and 7b are formed on the circumferential surfaces of the core rolls 5a, 6a, and 7a.

The fluororesin coating layers 5b, 6b, and 7b are made of fluororesin film (manufactured by Chukoh Kasei Co., Ltd.) for the core roll.
(20 mm width x 0.1 mm thickness) were crossed in a spiral shape, wound in layers, heat fused, and shrink-fitted to the core roll, and the peripheral surface was polished.

On the other hand, brush rolls 8, 9 and 10 are installed over the guide rolls 5, 6 and 7, respectively. This brush roll is made of stainless steel SUS316
Polypropylene fibers 8b, 9b, 10b were radially planted on core rolls 8a, 9a, 10a.

In the above example, the aluminum coil C
Where the hydrated oxide film treatment was performed, the guide roll 5,
The hydrated oxides adhering to the circumferential surfaces of the guide rolls 6 and 7 are successively removed by the brush rolls 8, 9, and 10, and the circumferential surfaces of the guide rolls 5, 6, and 7 are kept clean, and the aluminum coil C is free from unevenness. It has been confirmed that it does not cause any damage.

Similarly to the above, FIG. 2 shows a case in which the hydrated oxide film treatment apparatus 11 of the aluminum coil C is used, and the aluminum coil C is placed in a W-shape in the treatment liquid 13 filled in the treatment tank 12 in the same manner as described above. It is guided in a meandering manner and discharged outside after treatment. In the figure, 14 is a drive roll, 15,1
Reference numerals 6, 17, and 18 are guide rolls having fluororesin coating layers 15b, 16b, 17b, and 18b formed on their circumferential surfaces as in the previous embodiment.

Among the guide rolls, two guide rolls 16,1
8, the same brush roll 19 as above,
20 is installed, and the other two guide rolls 1
5 and 17, scraping plates 21 and 22 are installed.

The scraping plates 21 and 22 are fixed bases 21a and 22, respectively.
The support plates 21b and 22b are suspended from the support plates 22a, and fluororesin felts 21c and 22c are attached to the lower edges of the support plates 21b and 22b. , 17 in sliding contact.

In the above embodiment as well, it was confirmed that the circumferential surfaces of the guide rolls 15, 16, 17, and 18 were always kept clean and did not cause irregularities or scratches on the aluminum coil C, as in the previous embodiment.

The fluororesin coating tank of the guide roll in each of the above embodiments can be formed by shrink fitting as well as by baking painting or fitting a shrink tube, but shrink fitting is preferable.

In addition, for maintenance reasons, it is desirable for the bearings for installing each of the guide rolls to be outside the processing liquid, so if the bearings are located within the processing liquid, the shafts should be inserted through the processing tank wall and exposed to the outside. It is configured to project and pivot the projecting portion. Also, in terms of the height of the guide roll,
Setting the height so that the bearing is outside the processing liquid is advantageous in terms of maintenance and overall configuration.

(Effects) As explained above, according to this invention, the circumferential surface of the guide roll installed relative to the processing tank is always kept clean, so there is no risk of causing unevenness or scratches on the front and back surfaces of the metal coil to be chemically treated. It has the effect of being able to be processed beautifully.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an embodiment of this invention, and FIG. 2 is a system diagram of another embodiment. C... Aluminum coil, 2, 12... Processing tank, 3, 13... Processing liquid, 5, 6, 7, 15, 1
6, 17...Guide roll, 5b, 6b, 7b, 1
5b, 16b, 17b...fluororesin coating layer,
8, 9, 10, 19, 20...Brush roll, 2
1, 22... scraping board.

Claims (1)

[Claims for Utility Model Registration] 1. In a chemical surface treatment device for metal coils,
A fluororesin coating is formed on the circumferential surface of each of the plurality of rolls installed for guiding the coil, and a removal tool is attached to the circumferential surface to remove deposits due to chemical surface treatment. Features: A device for removing deposits from guide rolls for metal coils. 2. A device for removing deposits from a guide roll for a metal coil as set forth in claim 1 of the utility model registration claim, wherein the removal tool is a brush roll. 3. The device for removing deposits on a guide roll for a metal coil according to claim 1, wherein the removing tool is a scraping plate. 4. The device for removing deposits on a guide roll for a metal coil according to claim 1, wherein the removal tool is a combination of a brush roll and a scraping plate. 5. The device for removing deposits on a guide roll for a metal coil according to claim 1, wherein the roll is provided with a bearing for erection outside the processing liquid.