JPH04187796A - Method for continuously treating one side of extremely thin metallic foil - Google Patents

Abstract

PURPOSE:To firmly attach a metallic foil to a rotary drum and to excellently treat one side of the foil by dipping the foil firmly attached to the drum in a surface treating soln. and freely tilting the drum to uniformize the tension of the foil. CONSTITUTION:An extremely thin metallic foil is continuously supplied through a guide roll, attached to a rotary drum and dipped in a surface treating soln., etc., and the side out of contact with the drum is selectively surface-treated. In this device for continuously treating one side, the drum 20 is supported by a support 10 through a bearing 9, and the supports 10 and 10 are supported by a shaft 12 on the oil 13 in a cylinder 11. A material to be treated is delivered to the drum 20. When the tension of the material becomes nonuniform, the drum 20 is freely tilted by the difference in compressive force in the cross direction of the drum 20 resulting from the nonuniformity. As a result, the compressive force is uniformized, the material is firmly held to the drum 20 to prevent the intrusion of the surface treating soln., and only the one side is excellently treated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention continuously supplies ultra-thin metal foil through guide rolls and uses a rotating drum to achieve a good surface treatment on one side of a material to be treated. The present invention relates to a single-sided continuous surface treatment method.

(Prior art) A rotating drum type single-sided continuous surface treatment device brings the material to be surface treated into contact with a rotating drum, immerses it in the desired surface treatment liquid, etc., and selects only the surface that is not in contact with the rotating drum. It is configured to perform surface treatment on a regular basis.

Schematic diagrams of conventional rotary drum surface treatment apparatuses are shown in FIGS. 8, 9, and 10. FIG. 8 shows a surface treatment apparatus that performs electroplating by supplying an extremely thin metal foil (material to be treated) 2 through a power supply roll 3 and bringing it into contact with a rotating drum 1 whose outer periphery is coated with rubber. Power is supplied to the material to be processed 2 from a power supply roll 3. In the figure, 4 is an anode, and 5 is a processing liquid.

Figure 9 shows a surface treatment device that performs electroplating on one side by feeding an ultra-thin metal foil (material to be treated) 2 through guide rolls 6 and bringing the material to be treated 2 into contact with a conductive rotating drum 1. be.

Power is supplied to the material to be treated 2 from the rotating drum 1, 4 is an anode, and 5 is a treatment liquid.

Figure 10 shows the ultra-thin metal foil (material to be treated) 2 placed on the guide roll 6.
This is a surface treatment apparatus that performs single-sided electroplating by bringing the material 2 to be treated into contact with the rotating drum 1. In this device, a current-carrying ring 7 is provided at the center in the width direction of the rotating drum 1, and rubber 8 is provided on both sides of the current-carrying ring 7, and power is supplied to the material 2 to be processed by the current-carrying ring 7.

(Problem to be Solved by the Invention) In any case, the surface treatment apparatus using a rotating drum as described above treats the material to be treated by compressive force on the rotating drum generated by the tension applied to the material to be treated 2. It is configured to be brought into close contact with the rotating drum and to be surface treated on one side. However, when performing surface treatment on ultra-thin metal foil, the rigidity decreases as the metal becomes thinner, so the frame may stretch or break during transportation or processing. Therefore, transportation and processing are generally performed under low tension to prevent elongation and breakage. However, at low tensions the foil exerts less compressive force on the rotating drum. In addition, the foil tends to meander, and the compressive force applied by the tension of the material to be processed in the circumferential direction and width direction of the rotating drum becomes uneven, and the material to be processed does not come into complete contact with the rotating drum. The processing liquid enters the gap between the rotating drum and the material to be processed, and therefore, during electrolysis, current also flows to the back side of the processing surface, causing plating metal to be deposited on the back side. As a result, the surface quality of the foil may be significantly damaged,
In addition, the manufacturing process became complicated, causing problems in productivity.

An object of the present invention is to provide a method for continuous surface treatment on one side of ultra-thin metal foil that can eliminate such problems.

(Means for solving 411 problems) The gist of the present invention is as follows.

(1) Occurs due to uneven tension on the treated material in a single-sided continuous surface treatment device that continuously supplies ultra-thin metal foil through a guide roll and uses a rotating drum to perform surface treatment on one side of the treated material. By making use of the difference in compressive force in the width direction to the rotating drum, the rotating drum can be tilted freely, and the compressive force to the rotating drum is evened out. By doing so, the material to be processed can be brought into close contact with the rotating drum, and only one side can be processed. A continuous surface treatment method for one side of ultra-thin metal foil, characterized by subjecting surface treatment to the surface of the ultra-thin metal foil.

(2) In the single-sided continuous surface treatment device for ultra-thin metal foil described in item 1 above, the plating electrodes installed opposite the freely tiltable rotating drum are linked to the tilting of the rotating drum, and the distance between the electrodes is controlled to be constant. A single-sided continuous surface treatment method for ultra-thin metal foil according to item 1 above.

The present invention will be explained in detail below with reference to the accompanying drawings.

FIG. 1 shows a block diagram of a rotary drum used in carrying out the present invention. Both ends of a zero-rotation drum 20 are fixed so as to be rotatable on a support base 10 via bearings 9.
are fixed to the shaft 12 of the hydraulic cylinder 11, respectively.

Furthermore, the ends of each cylinder 11 are connected to each other by oil 13, which is a medium for transmitting roll compression force. Furthermore, the plating electrode 15 is attached to the shaft of the rotating drum 20 so that the rotating drum can rotate. With this structure, the rotating drum can rotate freely,
Furthermore, due to the difference in compressive force in the width direction on the rotating drum caused by uneven tension applied to the material to be treated, it is possible to tilt the rotating drum up and down while keeping the distance between the rotating drum and the electrodes constant. That is, by passing the material 2 to be treated so as to touch the lower side of the rotating drum 20, the edge of the rotating drum is A shaft 12 of a cylinder 11 fixed to the shaft tilts up and down via oil 13, which is a medium, to equalize the tension in the width direction. Support stand 1
The medium for interlocking the zeros is not limited to oil, but may be any medium that transmits the compressive force given by the tension of the metal foil to the rotating drum.The material of the rotating drum may also be, for example, a conductive material or an insulating material. There is no need to specifically limit the power supply, and it can be determined depending on the power supply method of the plating power supply. Furthermore, as a method for tilting the roll, as shown in FIG.
The plating electrode 15 is taken. The center portion of the support base 14 is further fixed to a support base 17 via a bearing 16. Both ends of the support base 14 are held by the support base 17 via springs 18, and are mounted so as to be in a balanced state. By doing so, the rotating drum 20 can freely rotate and can tilt up and down with respect to the load applied to the end of the roll. That is, by passing the metal foil in contact with the lower side of the rotating drum 20, the end portion of the rotating drum 20 is placed in the bearing 16 so that the end portion of the rotating drum 20 is balanced by the compressive force generated by the non-uniform tension in the width direction of the metal foil. It can be tilted freely up and down around the center. The spring 18 may be omitted, in which case it is balanced by compressive forces caused by uneven tension in the metal foil against the rotating drum. By making the tension in the width direction of the rotating drum uniform in this way, the material to be treated can be brought into close contact with the rotating drum, and the processing liquid will not enter into the gap, making it possible to perform good one-sided surface treatment. Further, by controlling the distance between the electrodes facing the rotating roll to be constant, the uniformity of the amount of adhesion can be improved.

Furthermore, the present invention will be explained in detail by specifically showing examples.

(Example 1) In the single-sided surface treatment apparatus shown in FIG.
A stainless steel foil with a thickness of 20 μm and a width of 20C11 was brought into contact with and passed through as the material to be treated 2, and the amount of adhesion was 1.5 at a current density of 5 A/d in a commonly used Watt bath.
One-sided Ni plating was carried out for 200 m at a threading speed of μm. Power was supplied to the material to be treated 2 from a power supply roll 3. The single-sided surface treatment method was evaluated by measuring the amount of Ni deposited on the front and back surfaces. Therefore, samples were taken every 2 m, and the samples were cut into strips of 20 CI in the length direction and 0.5 cm in the width direction of the foil, and the amount of Ni deposited on the front and back sides in the width direction was analyzed. The analysis results in the width direction averaged in the length direction are
4 shows a conventional single-sided surface treatment apparatus shown in FIG. 8, which has been converted into a rotating drum 20 with rubber applied to the outer periphery and structured according to the present invention. Single-sided Ni plating was performed using the apparatus under the same conditions as the conventional method described above, samples were taken under the same conditions, and the amount of Ni deposited on the front and back surfaces was analyzed. Table 1 shows the average amount of Ni deposited on the front and back surfaces according to the conventional method and the method of the present invention, and FIG. 5 shows the analysis results in the width direction.

Table 1 Results of analysis of the amount of Ni deposited on the front and back sides As can be seen from Table 1, FIGS. The amount of Ni attached can be reduced.

(Example 2) In the conventional single-sided surface treatment apparatus shown in FIG.
As the material to be treated 2, a stainless steel foil having a thickness of 20 am and a width of 20 C1 m was brought into contact with and passed through it, and the amount of adhesion was 1.5 cm at a current density of 5 A/dm in a commonly used copper sulfate bath.
One-sided Cu plating was performed for 200 m at a threading speed of 5 μm. Electric power was supplied to the material to be treated using the rotary drum 1.The evaluation as a single-sided surface treatment method was performed using the same adhesion measurement method as in Example 1.The analysis results are shown in FIG. Next, one-sided Cu plating was applied under the same conditions as in the conventional method using a single-sided surface treatment apparatus equipped with a conductive rotating drum 22 having a structure according to the present invention shown in FIG. Table 2 shows the average amount of Cu plating and the occurrence of color unevenness, and the analysis results in the width direction are shown in FIG. 7.

As can be seen from Table 2, FIG. 6, and FIG. 7, according to the present invention, color unevenness due to the difference in the amount of deposited Cu did not occur. Furthermore, compared to the conventional method, the uniformity of the amount of Cu deposited on the plated surface was also good, and the amount of Cu deposited on the back side could be reduced.

(Effects of the Invention) According to the present invention, since the material to be treated can be brought into close contact with the rotating drum, a good single-sided surface treatment can be performed. Furthermore, by controlling the distance between the electrodes facing the rotating roll to be constant, the uniformity of the amount of adhesion can be improved, which is highly effective.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 4 are schematic explanatory diagrams showing the structure of a rotating drum of an apparatus for implementing the present invention. Figures 3 and 5 are diagrams showing the implementation results of the conventional method and the present invention method in Example 1, and Figures 6 and 7 are diagrams showing the implementation results of the conventional method and the present invention method in Example 2. be. Figures 8, 9, and 10 are explanatory diagrams of a conventional rotating drum type single-sided surface treatment device, with (a) in each figure being a front view, and (b) in each figure being a schematic side view of the rotating drum. be. DESCRIPTION OF SYMBOLS 1... Rotating drum, 2... Processing material, 3... Power supply roll, 4... Electrode, 5... Processing liquid, 6... Guide roll, 7... Current-carrying ring, 8 ... Rubber, 9 ... Bearing, 10 ... Support stand, 11 ... Cylinder, 12 ... Cylinder shaft, 13 ... Oil, 14 ... Support stand, 15 ... Electrode , 16... Bearing, 17... Support stand, 18... Spring, 1
9... Stainless steel foil, 20... Rotating drum according to the present invention, 21... Stainless steel foil, 22... Conductive rotating drum according to the present invention. Patent applicant Nippon Steel Corporation

Claims (2)

[Claims] (1) Occurs due to uneven tension on the treated material in a single-sided continuous surface treatment device that continuously supplies ultra-thin metal foil through a guide roll and uses a rotating drum to perform surface treatment on one side of the treated material. By making use of the difference in compressive force in the width direction to the rotating drum, the rotating drum can be tilted freely, and the compressive force to the rotating drum is evened out. By doing so, the material to be processed can be brought into close contact with the rotating drum, and only one side can be processed. A continuous surface treatment method for one side of ultra-thin metal foil, characterized by subjecting surface treatment to the surface of the ultra-thin metal foil. (2) In the single-sided continuous surface treatment apparatus for ultra-thin metal foil according to claim 1, the plating electrodes installed opposite to the freely tiltable rotating drum are linked to the tilting of the rotating drum, so that the distance between the electrodes is kept constant. 2. The method for continuous surface treatment on one side of ultra-thin metal foil according to claim 1, further comprising: controlling the surface of ultra-thin metal foil.