JPH0211797A - Continuous coloring device - Google Patents

Abstract

PURPOSE:To uniformly color the surface of a metallic sheet by providing a movable shield plate having a surface not to be colored on the surface of the metallic sheet not to be colored, and furnishing a movable side shield plate on both sides of the traveling material sheet at right angles to the former shield plate. CONSTITUTION:A rotating shaft 34 is driven by a driving source 36 fixed to the base part 40c of a frame 40 through a speed reducer 48, a sprocket 50, a chain 52, and sprocket 46, and a stainless steel sheet 30 is conveyed by plural conveyor rolls 32 in the coloring soln. 20 in the inner vessel 22 of a coloring tank 12. A corrent is simultaneously applied to a counter electrode 60 and a feeder jig 62 from a power source 64 to electrolytically color the sheet 30. At this time, the movable shield plate 70 having a surface not to be colored is provided on the back of the sheet 30 not to be colored, the distance from the sheet 30 is controlled to about 5-10mm, the movable side shield plate 72 is provided on both sides of the traveling sheet 30 at right angles to the shield plate 70, and the distance from both ends of the sheet 30 is adjusted. By this method, the concentration of an electrolytic current on both edges of the sheet 30 and the infiltration of the current into the surface not to be colored are prevented, and the current flowing on the sheet surface is uniformized.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a continuous coloring apparatus, particularly a continuous coloring apparatus for coloring a metal plate, particularly a stainless steel plate, by an alternating current electrolysis method, and more specifically, a continuous coloring apparatus for coloring a metal plate, particularly a stainless steel plate, by an alternating current electrolysis method. Continuous with a shielding device that can change the distance between the stainless steel plate and the shielding plate laid on the non-colored surface and side surface of the stainless steel plate depending on the type, shape and dimensions, the color to be added and the electrolytic current to be applied. It relates to a coloring device.

<Prior art> As a method of imparting various color tones to stainless steel strips, the so-called lNC0 method mainly uses a mixed solution (sulfuric acid + chromic acid).
The method is known, and as a conventional technique,
Publication No. 840, Japanese Patent Publication No. 17146/1984, Publication No. 52
This method is disclosed in JP-A-32621 and JP-A-55-15553. The main products obtained by this method are veneers produced in a so-called batch process, in which veneers are clamped and dipped one by one in a fixed tank, but a method for continuously coloring stainless steel strips has also been disclosed. (Refer to Japanese Patent Publication No. 60-22065).

In addition, the present applicant has proposed a method for compensating for the disadvantages of producing colored stainless steel sheets by the above-mentioned INC0 method, published in Japanese Patent Application Laid-open No. 61-12.
In No. 7899, a coloring method using alternating current electrolysis was proposed, and patent applications No. 60-200821 and No. 60-244 were proposed.
No. 783 proposes a continuous line coloring method using the alternating current electrolysis method and an apparatus therefor.

However, all of the methods described above have been either a batch method exclusively for sheet steel sheets or a continuous method exclusively for copper strips using a large-diameter immersed roll. In the case of the batch type, the work such as attaching and removing the sheet steel plate to the hanger is complicated, and it is difficult to suppress the occurrence of color unevenness due to deformation of the sheet steel plate. In some cases, installation fees were required. In addition, in the case of a continuous type, the pass line fluctuates, making it difficult to perform initial threading, making it difficult to change the steel type.
There were problems such as the occurrence of defective parts at the connection part when switching colors, the occurrence of scratches on the coloring surface, and high equipment costs.

In order to solve these drawbacks, the present applicant has filed Japanese Patent Application No. 61-283698 and Japanese Patent Application No. 62-19138.
In No. 1, we proposed a continuous coloring device using a horizontal sheet passing method, which can color sheet steel sheets or #4F in the same device in a batch manner for sheet steel sheets and in a continuous manner for copper strips. ing.

In such a continuous coloring apparatus for metal plates and metal strips, a current is passed through the continuously running metal plates and metal strips, similar to continuous electroplating, so that edge concentration of the current occurs.

In the case of continuous electroplating, this edge concentration of current causes excessive deposition of plating called edge overcoat. To prevent this edge overcoat,
Various prevention devices have been proposed.

Generally, in metal plating, etc., a method as shown in FIGS. 3a and 3b is adopted. As shown in Fig. 3a, a steel plate (copper strip) 202, which is a wing to be plated, and an electrode (
The anodes (anodes) 204 are placed facing each other with a predetermined spacing between them, but in order to prevent edge concentration of current generated on both sides of the steel plate 202, U-shaped edge masks 206, 206 are placed on both sides of the steel plate 202. It was covered. Changes in the width of the steel plate 202 are handled by moving the supports 208, 208 that support the edge masks 206, 206 at their tips using a moving means (not shown).

Further, in the example shown in FIG. 3b, the steel plate 202 and the electrode 204
A plate-shaped shield 210, 210 is placed between its support 21
2.212, and masked the edges on both sides of the steel plate 202 to prevent concentration of current at the edges.

In addition, for example, the applicant has
No. 63-2772 proposes an edge overcoat prevention device that follows the meandering of a copper strip and changes in strip width.

<Problems to be Solved by the Invention> By the way, the standard current density used in alternating current electrolysis is about ±0.1 A/dm2, which is extremely small compared to electroplating, and is less than the required density for colored surfaces. Since the degree of uniformity of the current is extremely high compared to the uniformity required for the plated surface, the edge overcoat prevention device for electroplating shown in Figures 3a and 3b is used to prevent metal plates that are the material to be colored. Another problem is that it is not possible to uniformly control the current flowing through the surface of the metal strip.

Furthermore, as shown in Figures 3a and 3b, an edge mask that covers only both sides of the metal plate and metal strip in the direction of travel, that is, both end faces perpendicular to the direction of travel, sufficiently prevents the electrolytic current from flowing around to the non-colored surface. The problem is that it cannot be done. In particular, in the case of a sheet metal plate, it is not possible to prevent the current from concentrating on the edge of the front and rear end faces of the metal plate, and furthermore, it is not possible to prevent the current from flowing around to the non-colored surface, There was a problem in that the current flowing through the mating plate surfaces, that is, the colored surfaces, could not be made sufficiently uniform.

Even if the present applicant has an edge overcoat prevention device that can follow the meandering of the steel strip and changes in the strip width as disclosed in Japanese Patent Publication No. 61-40320 and Japanese Utility Model Application No. 63-2772. The equipment shown in Figures 3a and 3b is intended for electroplating, and the shielding methods are not different.As mentioned above, the electrolytic coloring equipment cannot sufficiently prevent edge concentration and wrapping. There's a problem.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to lay a non-colored surface shielding plate so as to cover the non-colored surface of a metal plate and metal strip which are colored materials, and to The distance between the coloring surface shielding plate and the coloring surface shielding plate can be adjusted, and horizontal shielding plates are provided on both sides of the coloring material in the traveling direction to cover the end faces of the coloring material on both sides, and the distance between the end face and the horizontal shielding plate is arranged. By making the distance between the two surfaces adjustable, it is possible to prevent the current from concentrating on the edges when passing through the material to be colored, and to prevent the electrolytic current from flowing around to the non-colored surface of the material to be colored. An object of the present invention is to provide a continuous coloring device equipped with a shielding device that can uniformly control the current flowing through the plate surface of a material to be colored.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a continuous coloring device for electrolytically coloring a metal plate that is continuously passed through, which comprises: A movable non-colored surface shielding plate to be laid, and a movable tank shielding plate disposed at right angles to the non-colored surface shielding plate and on both sides of the metal plate in the traveling direction, the metal plate, the non-colored surface shielding plate, and The present invention provides a continuous coloring device characterized by having a shielding device that allows the distance between the metal plate and the horizontal shielding plate to be adjusted.

In the present invention, the metal plate includes sheet metal plates and metal strips, and may be any metal plate that can be colored, but a stainless steel plate will be described below as a representative example.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The continuous coloring apparatus according to the present invention will be described in detail below based on preferred embodiments shown in the accompanying drawings.

FIG. 1 is a cross-sectional view showing an embodiment of an alternating current electrolytic coloring device to which the continuous coloring device of the present invention is applied.

In the figure, an alternating current electrolytic coloring apparatus 10 includes a coloring M12 filled with a coloring liquid, a conveyance device 14 for conveying a stainless steel plate, a power supply device 16 for performing alternating current electrolysis, and an edge source for supplying current to a stainless steel plate. It has a shielding device 18 that prevents concentration and wraparound to non-colored surfaces.

Here, the coloring method for stainless steel sheets by alternating current electrolysis is achieved by optimally combining the anodic electricity quantity and cathodic electricity quantity of the alternating current. It is carried out in one step using one liquid. The coloring solution used here is mainly a mixed solution of chromic acid and sulfuric acid, with additions of other chromium compounds, molybdic acid, etc., as well as solutions containing permanganate, vanadium compounds, and other metal oxides in sulfuric acid or alkali. Any solution may be used as long as it can be colored by alternating current electrolysis, such as a solution mixed with a solution.

The coloring tank 12 includes an inner tank 22 filled with the coloring liquid 20 and an outer tank 2 for receiving the colored liquid 20 which is warm and humid from the inner tank side wall 24.
This tank has a body structure having a double structure with 6 and 6, and the outer tank side wall 28 is provided higher than the inner tank wall 24.
Here, the coloring tank 12 has a core material such as iron or stainless steel (SUS), but since the coloring liquid 20 is usually an acidic and highly corrosive solution containing sulfuric acid, chromic acid, etc., the coloring tank 12 is The inner surface, especially the inner surface of the inner tank 22, must be corrosion resistant.
It is preferable to coat it with a material having high chemical resistance and insulation properties, for example, a fluororesin such as vinylidene difluoride or vinylidene tetrafluoride.

The conveying device 14 includes a plurality of conveying rolls 32 (five rolls 32a and 32b in FIG.
, 32c, 32d, 32e), the rotation shaft 34 of the plurality of transport rolls 32a to 32e, a drive source 36 disposed outside the coloring tank 12 for rotationally driving the transport roll 32, and a drive source 36 of the drive source 36. A driving force transmitting means 38 for transmitting the rotational driving force to the rotating shaft 34, and a driving force transmitting means 38 for transmitting the rotational driving force to the rotating shaft 34,
4 and also supports a drive source 36 outside the coloring tank 12, and constitutes a unitized transport unit 42, which is configured to be detachably incorporated into the coloring tank 12. ing. In the example shown in FIG. 1, the conveyance rolls 32 are arranged in a row of five rolls 32a to 32e at predetermined intervals determined according to the widths of stainless steel plates 30 of various shapes to be colored. Although the rolls are arranged on one rotating shaft 34, the number and shape of the rolls are not particularly limited.

If there is one row, the conveyance roll 32 may consist of one continuous roll.

Here, the frame 40 has a center portion that is connected to the transport roll 32.
A horizontal part 40a that crosses the lower side of a to 32e along the bottom of the inner tank 22, and along the inner phase side wall on both sides of the horizontal part 40a,
Platform parts 40c, 40c are horizontally spanned over the rising vertical parts 40b, 40b and the outer tank 26, 26, and on which the drive source 36, a part of the drive force transmission means 38, etc. are placed and fixed, and supported;
On both sides thereof, there are support parts 40d, 40d that support not only the frame 40 itself but also the transport unit 42 on the outside of the external side wall 28 of the coloring tank 12.

The rotating shafts 34 of the conveyance rolls 32a to 32e have bearings 44 and 44 at both ends of the rotating shafts 34 in the vertical parts 40b and 40b of the frame 40, respectively.
It is pivoted through.

The rotating shaft 34 passes through one vertical portion 40b of the frame 40, and has a sprocket 46 attached to its tip.

On the other hand, a drive source 36 is fixed on the platform 40c on the same side, and a rotating shaft 36a of the drive source 36 is connected to a reducer 48 such as a two-ohm reducer. Nikesubu 0 butt 50 is installed and sprocket 4
A chain 52 is stretched between the sprocket 6 and the sprocket 50. Here, the reduction gear 48, the sprocket 50, and the chain 52 constitute the driving force transmission means 38. Here, as the driving force transmission means 38, the sprocket 46.5
Although a chain transmission means consisting of a zero and a chain 52 is used, the present invention is not limited thereto, and transmission means such as gear transmission and belt transmission can be used alone or in combination.

As mentioned above, the coloring liquid 20 is usually an acidic and highly corrosive solution containing sulfuric acid, chromic acid, etc.
For example, the horizontal part 40 of the frame 40
a. For parts that require strength, such as the vertical parts 40b, 40b and the rotating shaft 34, a material with high corrosion resistance and chemical resistance such as titanium or titanium alloy is used as a core material, and the surface is coated with vinylidene difluoride or other materials. It is coated with a fluororesin such as vinylidene tetrafluoride to provide insulation, corrosion resistance, and chemical resistance. Furthermore, the transport rolls 32a to 3
2e, sprockets 46, 50, drive force transmission means 38 such as chains 52, bearings 44, 44, fixing devices such as bolts, nuts, etc., and all members immersed in the colored liquid 20 are preferably made of fluororesin. . It is also possible to use a member made of this chemically modified ceramic, such as a ceramic bearing.

A plurality of site guide rolls 53 are provided on both sides of the stainless steel plate 30 in order to prevent meandering when the stainless steel plate 30 is passed through. The side guide rolls 53 can be adjusted according to the width of the stainless steel plate 30.

The transport unit 42 is composed of the above-mentioned components, but in addition to the above-mentioned components, any necessary components as a transport device may be added.

Moreover, as shown in FIG.
In the conveying direction of the stainless steel plate 30, multiple rows are arranged at intervals shorter than the minimum length of the stainless steel plate 30, which is the material to be colored, so that the conveying unit 42 treats each row, that is, one rotating shaft 34 as one unit. It may be made into a unit, each of multiple rows, or all of them may be made into one unit.

In the present invention, the transport roll 32 immersed in the coloring liquid 20 and parts that require precision such as the drive source 36 placed outside the coloring tank 12 are integrated into an integrated frame 40. A coloring tank cover 54 is attached to the coloring tank 12.
Parts that require precision, such as the drive source 36, are preferably placed outside the coloring tank cover 54 in order to avoid the adverse effects of the colored liquid 20 in the coloring tank 12.

The power supply device 16 includes a fixed electrode 56 and split electrodes 58a and 58 disposed at a predetermined distance from each other, facing the upper surface of the stainless steel plate 30 on the conveyor rolls 32a to 32e.
8 b, 58 c, 58 d.

A counter electrode 60 consisting of 58e and 58f, and a stainless steel plate 3
A power supply jig 62 that supplies power to the g! The counter electrode 60 and the power supply jig 62 are supplied with a predetermined amount of alternating current from the power supply 64 .

The electrode device includes a counter electrode 60 consisting of a fixed electrode 56 and divided electrodes 58a to 58f, support rods 59a to 59f, and electrode moving means 66.

The counter electrode 60 includes a fixed electrode 56 having a length in the width direction corresponding to the minimum width of the stainless steel plate 30 to be passed through the central part, and a fixed electrode 56 having a predetermined size depending on the type of width of the stainless steel plate 30 to be passed through. Divided electrode 58a divided into six pieces having a
58f, and the divided electrodes 58a to 58c and the divided types 8i58d to 58f are arranged in a line on both sides of the fixed electrode 56.

The divided electrodes 58a to 58f are supported by support rods 59a to 5, respectively.
9f, and the support rods 59a to 59f are connected to an electrode moving means 66 consisting of a lifting device or the like, and when the divided electrodes 58a to 58f are used, the fixed electrodes 56 in the colored liquid 20 of the colored inner tank 22 are moved in the same column. It is configured to be able to move from the position to a position outside the colored liquid 20 shown by the broken line in FIG.

Depending on the plate width of the stainless steel plate 30 to be colored, some of the divided electrodes 58a to 58f are pulled up from the coloring liquid 20 by the divided electrode moving means 66 or returned to the coloring liquid 20, so that the stainless steel plate 30 is constantly colored. Since an electrode having a length corresponding to the width can be used as the counter electrode 60, the stainless steel plate 30 can be uniformly energized.

Here, in the example shown in FIG. 1, six divided electrodes 58a to 58f are arranged symmetrically on both sides of the fixed electrode 56, but the present invention is not limited to this.
The number, shape, dimensions, and arrangement positions of the divided electrodes may be any number as long as they are determined according to the dimensions of the stainless steel plate 30, which is the material to be colored, especially the width of the plate.

In FIG. 1, the electrode moving means 66 includes the divided electrode 58
Although the lifting device raises and lowers the support rods 59a to 59f fixed to a to 58f, the divided electrodes 58a to 58f
Any material that can move the inside and outside of the processing liquid 20 may be used. For example, a wire and a winch may be used, or a rack and gears, a belt, a chain, or a movable pulley may be used to connect the divided electrodes 58a to 513f directly or to the support rod 59.
Anything that can move a to 59f may be used.

Furthermore, even if an electrode device is used to form a counter electrode 60 corresponding to the plate width of the stainless steel plate 30 using the divided electrodes 58a to 58f, it is of course possible to add a means for uniformizing the current flow, such as a shielding plate. .

Here, the power supply jig 62 may be of any type as long as it can supply the necessary current to the stainless steel plate 30 from the colored surface of the stainless steel plate 30, that is, the surface other than the surface facing the counter electrode 60.If it is not inconvenient, it may be of any type. You can also supply power directly.

The shielding device 18 is a characteristic feature of the present invention, and includes a movable non-colored surface shielding plate 70 installed opposite the non-colored surface, that is, the back surface of the stainless steel plate 30, and a non-colored surface shielding plate 70. It has movable horizontal shielding plates 72 disposed at right angles on both sides of the stainless steel plate 30 in the direction of movement, that is, on two side surfaces in a direction perpendicular to the direction of movement.

In the example shown in FIG. 1, the non-colored surface shielding plate 70 has the colored surface as the upper surface of the stainless steel plate 30, which is the material to be colored. A non-colored surface shielding plate (hereinafter referred to as a lower shielding plate) 70 is provided over the entire lower part. A transport roll 32 consisting of rolls 32a to 32e and a power supply jig 62 are in contact with the lower surface of the stainless steel plate 30, and a plurality of side guide rolls 53 are in contact with both sides. Side guide roll 5
The lower shielding plate 70 is left open at the portion where G is set, so that the transport roll 32 and the power supply jig 62 can directly contact the lower surface of the stainless steel plate 30, and the sight guide roll 53 can directly contact both side surfaces. It is preferable to leave it there. The size of the lower shielding plate 70 is preferably as large as possible if it can be installed, but it is preferable that the lower shielding plate 70 has a width larger than the maximum width of the stainless steel plate 30.

The lower shielding plate 70 has a level adjustment function so that it can be moved in the vertical direction depending on the type of stainless steel plate 30, the electrolytic current, the passing speed of the stainless steel plate, etc., depending on the amount of electrolytic current flowing to the back surface of the stainless steel plate 30. It is preferable to have the following. The distance between the steel plate 30 and the lower shielding plate 70 may be any distance as long as it can be transported, for example, 5 to 10 m.
Preferably, it is m. In this way, the lower shielding plate 70 is
It is possible to prevent current edge concentration and current leakage from not only the width side ends of the stainless steel plate 30 but also the leading and trailing ends in the advancing direction when passing a single sheet steel plate. The lower shielding plate 70 may be configured so that it can be incorporated into the transport device 14 together with the transport unit 42.

Since the width of the counter electrode 60 changes according to the width of the stainless steel plate 30, the horizontal shielding plate 70 moves in the width direction of the stainless steel plate 30 according to the width of the counter electrode 60, and shields from both end surfaces of the stainless steel plate 30. It is preferable to configure the shielding distance so that it can be freely adjusted. The installation height of the horizontal shielding plate 70 is preferably such that its lower part is close to the lower shielding plate 70 and its upper part protrudes from the processing liquid 20. The length of the horizontal shielding plate 70 in the traveling direction is preferably as long as possible, and may be any length that does not cause any inconvenience to the adjustment movement.

The lower shielding plate 70 and the horizontal shielding plate 72 may be made of any material as long as it has insulating properties, such as synthetic resins such as vinylidene difluoride and vinylidene tetrafluoride,
Rubber or the like is preferable, and it may be made of only these materials or may have the surface coated with these materials. Further, the lower shielding plate 70 and the horizontal shielding plate 72 may be a single plate of the above material, a combination of a plurality of plates, or a plurality of divided shielding plates. When using a plurality of divided shielding plates, it is preferable to configure them so that they can be adjusted independently or simultaneously.

FIG. 2 shows a cross-sectional view of the entire line of a continuous coloring device 100 using the alternating current electrolytic coloring device 10 shown in FIG. The example shown in FIG. 2 is for continuous coloring of a sheet-like stainless steel plate, but the wood coating can of course be applied to stainless steel strips.

As shown in the figure, a continuous coloring apparatus 100 for stainless steel sheets
, the degreasing tank 102 for pre-treatment → the drying tank 104
→Pickling tank 106 - hot water washing tank 108 and pre-treatment device 110
After that, an alternating current electrolytic coloring device 10 that performs coloring and hardening in one liquid and one process is installed, followed by a hot water washing tank 112 that performs post-treatment.
→ hot water washing tank 114 → dryer 116 and subsequent post-processing device 118
Set up. Pairs of seal rolls 122 are disposed on each of the above-mentioned sides so that the stainless steel plate 120 can pass horizontally, that is, so that the pass line is horizontal. 124 is a guide roll.

What is shown in FIG. 2 is a pair of coloring tank seal rolls 126 on both sides of the coloring tank 12 of the alternating current electrolytic coloring apparatus 10.
is arranged to prevent the coloring liquid 20 from leaking and to prevent the stainless steel plate 1 from leaking.
In this example, 20 horizontal passes are possible.

A conveying unit 42 constituting the conveying device 14 is incorporated into the coloring tank 12 of the alternating current electrolytic coloring apparatus 10, and a conveying roll 32 is pivotally supported by a frame 40 of the conveying unit 42.
The stainless steel plate 120 is transported by.

A plurality of counter electrodes 60 are disposed above the stainless steel plate pass line at a certain distance from the pass line. The counter electrode 60 is composed of a fixed electrode (indicated by 56 in FIG. 1) and divided electrodes (indicated by 58a to 58f in FIG. 1). Uniform energization is possible. At this time, the side guide rolls 53 and the horizontal shielding plate 72 are also adjusted according to the length of the counter electrode 60 in the plate width direction to prevent meandering of the steel plate 120 and edge concentration of current, respectively.

A large number of power supply jigs 62 are disposed below the stainless steel plate pass line, and the lower shielding plate 70 connects the stainless steel plate 120 to the stainless steel plate 120.
It is laid out so that it covers the entire surface of the area.

A saucer 128 may be provided before and after each phase and/or between each phase to receive the content liquid or cleaning liquid. Second
The figure shows an alternating current electrolytic coloring tank 12, M2O3 before and after it,
An example is shown in which a saucer 128 is provided between the plate 112 and the plate 112.

A color identification sensor 130 is installed on the outlet side of the alternating current electrolytic coloring tank 12.
It is suitable for producing a stable colored steel sheet to install a color steel sheet, connect it to the electrolytic condition control computer 132, connect the computer 132 to the power supply 64, and manage the color tone of the steel sheet coloring.

Function> The continuous coloring device according to the present invention is basically constructed as described above, and its function will be explained below.

The stainless steel plate 120 is carried out from the device 134, removed from the surface by a degreasing tank 102 (alkaline bath) of the pretreatment device 110 to remove dirt such as oil adhering to the surface, washed with hot water M104, and then transferred to a pickling (for example, nitric acid bath) tank. After forming a uniform passive film on the surface in step 106 and washing with hot water N108, it is led to the coloring tank 12 of the alternating current electrolytic coloring device 10.

This coloring tank 12 is provided with a counter electrode 60 whose length is adjusted to correspond to the width of the stainless steel plate 120 by moving the divided electrodes 58a to 58f according to the width of the stainless steel plate 120. Uniform alternating current electrolysis is carried out by uniform energization between
Go out from 2. At this time, in the coloring tank 12, the lower surface of the stainless steel plate 120, which is the non-colored surface, is shielded by the lower shielding plate 70, and the side surfaces on both sides in the advancing direction are shielded by the horizontal shielding plates 72 that move according to the width of the plate. There is no edge concentration or wraparound of current, and the current can be uniformly applied to the surface of the stainless steel plate 120.

A color identification sensor 130 is installed on the colored stainless steel plate 136 at the outlet of the colored tank 12, and a part of the solution adhering to the colored stainless steel strip 136 is blown off with compressed air, and the color tone is measured on this part. If the data exceeds the preset color difference limit by manually inputting the data (color display should use JIS Z 8730 color difference) into the control computer 132, change the electrolytic conditions (anodic electrolysis/cathode electrolysis). current density 1, and each electrolysis time t,
It is preferable in terms of color tone control to control the coloring process by feeding back the number of electrolysis cycles (N, bath temperature, etc.). At this time, it is not necessarily necessary to change the sheet passing speed.

In this way, the stainless steel plate 136 finished in the expected color tone is transferred to the two hot water wash tanks 1 of the subsequent post-treatment device 118.
At 12.114, the solution on the surface is completely washed off, and the surface is dried by hot air blown from the dryer 116 outside the tank. Thereafter, it is loaded onto a bailer 140, preferably with a protective sheet 138 inserted therebetween.

Although the continuous coloring apparatus of the present invention has been described above using an example in which the continuous coloring apparatus of the present invention is applied to an alternating current electrolytic coloring apparatus that performs an alternating current electrolytic coloring method, the present invention is not limited to this. The present invention can be applied to any process in which a material to be treated, such as plating, is electrolytically treated by immersing it in a treatment solution.

Further, the continuous coloring device of the present invention is not limited to that described above, and it goes without saying that various improvements and changes in design can be made without departing from the gist of the present invention.

<Effects of the Invention> As described in detail above, according to the present invention, a continuous coloring device capable of continuous sheet passing, particularly a metal sheet as a material to be colored, particularly,
A non-colored surface shielding plate that can move 8 times is installed on the part opposite to the non-colored surface of the stainless steel plate, that is, the entire lower part of the pass line, and a non-colored surface shielding plate that can move 8 times in the width direction of both plates of the metal plate is installed. By arranging horizontal shielding plates, it is possible to prevent the edge concentration of electrolytic current at the leading and trailing edges and the widthwise ends of both plates, as well as the wrap-around of electrolytic current to non-colored surfaces, during sheet passing, especially when passing sheet metal plates. Since the shield is placed in an optimal state that can prevent this, the current flowing on the surface of the metal plate can be made uniform.

Therefore, according to the present invention, even if the material to be colored is a sheet metal plate, it can be adjusted according to the plate width, material, electrolytic conditions, etc., so it is compatible with a wide variety of plate widths of the material to be colored. Since ideal current lines can be formed, a uniform oxide film can be formed and uniform coloring can be achieved. In addition, by using the continuous coloring apparatus of the present invention, it is possible to produce uniformly colored plates even if a wide variety of products are produced in small quantities.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an alternating current electrolytic coloring apparatus to which a continuous coloring apparatus according to the present invention is applied. FIG. 2 is a longitudinal sectional view of the entire continuous coloring apparatus according to the present invention. Figures 3a and 3b are cross-sectional views of conventional shielding devices in electroplating. Explanation of symbols 10... Alternating current electrolytic coloring device, 12... Coloring tank, 14... Conveying device, 16.
... Power supply device, 18... Shielding device, 20... Colored liquid, 22... Inner tank, 24... Inner tank side wall,
26...Outer tank, 28...Outer tank side wall, 30...
Stainless steel plate, 32 32a 32b
32c 32d32e... Conveyance roll, 34... Rotating shaft, 36... Drive source, 36a...
-Rotating shaft, 38...Driving force transmission means, 40...Frame, 40a...Horizontal part, 40b...Vertical part, 40c...
...Base part, 40d...Support part, 42...Transport unit, 44...Bearing, 4650...Sprocket, 48...Reducer, 48a...Output shaft, 52...
...Chain, 53...Side guide roll, 54...Cover for coloring tank 56...Fixed electrode, 58a, 58b, 58c, 58d, 58e. 58f... divided electrode, 59 a, 59 b, 59 c, 59 d, 5
9 e. 59f...Support rod, 0...Counter electrode, 62...Power supply jig, 4...
Power supply, 66... Electrode moving means, 0... Non-colored surface shielding plate, 2... Horizontal shielding plate, 00... Continuous coloring device, 02... Degreasing tank, 104... Hot water washing tank , 06...
・Pickling tank, 108... Hot water washing tank, 10... Pre-treatment device, 12.114... Hot water washing tank (i, 16... Dryer, 18... Post-treatment device, 20. ...Stainless steel plate (wilF), 22...Seal roll pair, 24...Gite roll, 26...Electrolyzer seal roll pair, 28...Saucer, 30...Color identification sensor 32... Control computer 34... depiler, 36... colored stainless steel plate (steel strip), 138...
Protection 140... Baira

Claims (1)

[Claims] (1) A continuous coloring device for electrolytically coloring a metal plate that is continuously passed through, comprising a movable non-colored surface shielding plate installed opposite to the non-colored surface of the metal plate, and a movable non-colored surface shielding plate perpendicular to the non-colored surface shielding plate. and movable horizontal shielding plates disposed on both sides of the metal plate in the traveling direction, the shielding having adjustable distances between the metal plate and the non-colored surface shielding plate and the metal plate and the horizontal shielding plate. 1. A continuous coloring device comprising: