JP4866706B2 - Metal foil electrolytic manufacturing equipment - Google Patents

Description

  The present invention relates to a rotating cathode drum on which a metal foil is electrodeposited, an anode facing the rotating cathode drum, and a metal on the rotating cathode drum while continuously supplying an electrolyte between the rotating cathode drum and the anode. The present invention relates to a metal foil electrolytic production apparatus for electrodeposition.

The conventional metal foil electrolytic manufacturing apparatus has a problem that the flow of the supplied electrolyte solution is difficult to be uniform and it is difficult to obtain a metal foil having a uniform thickness. In order to solve this problem, inventions described in the following patent documents have been proposed.
Japanese Patent No. 3150814

  In the invention described in Patent Document 1, an electrolyte supply port of an electrolyte supply device that continuously supplies an electrolyte between a rotating cathode drum and an anode is formed in a slit shape parallel to the rotation axis direction of the rotating cylindrical cathode. Further, a plurality of electrolyte flow rate adjusting means are provided over the width section in which the metal foil is electrodeposited at the electrolyte solution supply port, which opens from the bottom of the rotating cylindrical cathode to the gap.

  In the electrolyte supply port described in Patent Document 1, the flow rate is adjusted by a plurality of electrolyte flow rate means over the width section, so the flow of the electrolyte supplied from the opening is uneven, and the surface of the rotating cylindrical cathode is There was a problem that it was not evenly supplied. Further, the plurality of electrolyte flow rate adjusting means are not practical due to their complicated configuration.

  The present invention solves the above-mentioned problems, and with a simple configuration, a metal foil electrolytic manufacturing apparatus that can uniformly supply the flow of the electrolytic solution supplied from the liquid supply device and can evenly supply the surface of the rotating cathode drum. The purpose is to provide.

The gist of the present invention is that a rotating cathode drum on which a metal foil is electrodeposited, an anode having an arcuate curved surface facing the rotating cathode drum, and an electrolyte solution in a liquid flow path between the rotating cathode drum and the anode. In the metal foil electrolysis manufacturing apparatus in which a metal supply electrode is deposited on the rotating cathode drum while supplying the electrolyte, and the metal foil is continuously peeled off from the rotating cathode drum The apparatus is a cylindrical body with a square cross section, which is arranged in parallel with the rotating shaft of the rotating cathode drum, and which is formed by a long side plate, a top plate, and a bottom plate to which a liquid inflow port is connected. And an upper end is disposed in the liquid flow passage, and a slit-like gap is continuously opened between the upper ends of the both side plates and the top plate, and the electrolyte is supplied upstream and downstream of the liquid flow passage. The liquid supply port to be supplied to each side is configured.

Further, the gist of the present invention is that a recess is formed by notching part of the upper end portion and communicating the liquid chamber and the liquid flow passage at both end portions in the longitudinal direction of the upper end portions of the both side plates. There is.

  Further, the gist of the present invention resides in that the liquid supply port can adjust the gap between the openings.

Further, it is an aspect of the present invention, the liquid supply apparatus has two or more liquid chambers contiguous, arranged decompression mechanism between the liquid chambers, the electrolytic solution sequentially from the inlet of the liquid supply device After the pressure is reduced, it is to flow out from the liquid supply port.

  The gist of the present invention is that the pressure reducing mechanism narrows the liquid flow path by a slit plate.

  The gist of the present invention is that the pressure reducing mechanism is made of a porous material.

  Further, the gist of the present invention resides in that the pressure reducing mechanism is composed of a filler having voids.

According to the first aspect of the present invention, the liquid supply apparatus includes the liquid supply port having two slit-shaped openings on the upstream side and the downstream side of the liquid flow passage, and the liquid supply port is Since the electrolyte device is continuously opened along the width direction of the liquid device, the electrolytic solution is smoothly and evenly supplied along the surface of the rotating cathode drum over the entire width direction of the rotating cathode drum circumferential surface. .
Thereby, the thickness of the metal foil formed on the peripheral surface of the rotating cathode drum becomes uniform, and a high-quality metal foil can be efficiently produced with an apparatus having a simple configuration.

According to the second aspect of the present invention, since the gap between the liquid supply ports is widened at both end portions by the recesses formed at both end portions of the upper end portion of the side plate, a large amount of electrolyte flows out. For this reason, a large amount of electrolyte is supplied near both ends of the rotating cathode drum located in the vicinity of the concave portion, so that the foil is formed thicker than the other portions, and the foil easily breaks from both ends when winding up conventionally. Has been resolved.

  According to the third aspect of the present invention, since the liquid supply port can adjust the gap between the openings, the supply amount of the electrolytic solution can be easily adjusted, and the liquid supply from each opening can be performed. The amount balance can be changed.

According to the fourth aspect of the present invention, the liquid supply device has two or more continuous liquid chambers, and a pressure reducing mechanism is disposed between the liquid chambers. When flowing into one liquid chamber, the flow rate is absorbed, and when passing through the pressure reducing mechanism, a uniform pressure and a uniform flow rate are obtained in the width direction.

  According to a fifth aspect of the present invention, the pressure reducing mechanism is formed of a slit plate, and thereby the liquid flow path is narrowed, whereby the electrolyte is made to have a uniform pressure and the flow rate is made uniform over the entire length of the pressure reducing mechanism. be able to.

  According to the sixth aspect of the present invention, since the pressure reducing mechanism is made of a porous material, the electrolyte can be made to have a uniform pressure with a simple structure and the flow rate can be made uniform over the entire length of the pressure reducing mechanism.

  According to the seventh aspect of the present invention, since the pressure reducing mechanism is composed of a filler having a gap, the electrolyte is made to have a uniform pressure with a simple structure and the flow rate is made uniform over the entire length of the pressure reducing mechanism. Can do.

  In the best mode of the present invention, an electrolytic solution is supplied to a rotating cathode drum on which a metal foil is electrodeposited, an anode having an arcuate curved surface opposed to the rotating cathode drum, and a liquid flow path between the rotating cathode drum and the anode. In the metal foil electrolysis manufacturing apparatus provided with the liquid supply device, the liquid supply device is arranged in parallel with the rotation axis of the rotating cathode drum, and has slit-like openings on the upstream side and the downstream side with respect to the rotation direction. The liquid supply port has a liquid supply port, and the liquid supply port is formed at the top of the liquid supply device, and is continuously opened at the same gap along the width direction of the liquid supply device. Device.

A first embodiment of the present invention will be described with reference to the drawings.
1 is a schematic cross-sectional side view of a metal foil electrolysis production apparatus according to the first embodiment, FIG. 2 is a cross-sectional front view of a liquid supply apparatus, FIG. 3 is an enlarged cross-sectional view taken along line III-III in FIG. FIG.

An outline of the metal foil electrolytic production apparatus A will be described with reference to FIG. This apparatus has a structure similar to that conventionally used, and includes a rotating cathode drum 1 on which a metal foil is electrodeposited, and an anode 2 disposed so as to face the periphery of the rotating cathode drum 1. At the lower end position of the rotating cathode drum 1, a liquid supply device 5 for supplying an electrolytic solution to a liquid flow passage 8 provided between the rotating cathode drum 1 and the anode 2 is provided.
An electrolytic solution is supplied from the inside of the liquid supply device 5 toward the liquid flow passage 8, and the electrolytic solution rises along the circumferential shape of the rotating cathode drum 1 as indicated by an arrow in FIG. It will do. As a result, the metal foil 10 electrodeposited on the peripheral surface of the rotating cathode drum 1 is taken up by the take-up roll 12 via the guide roll 11.

The liquid supply device 5 of this embodiment is configured at the upper end of the liquid inlet 4 communicating with an electrolyte tank (not shown), and the upper end is disposed in the liquid flow passage 8.
The liquid supply device 5 is a cylindrical body constituted by long side plates 51, 51 and a top plate 52, and two liquid chambers R1, R3 are provided therein. The liquid supply device 5 has the same length as the width of the rotating cathode drum 1 and is disposed in parallel with the rotating shaft of the rotating cathode drum 1.

A gap is formed between the upper ends of the side plates 51, 51 of the liquid supply device 5 and the top plate 52, and the electrolyte is supplied upstream (in the direction of arrow X in FIG. 3) and downstream (in FIG. 3). Liquid supply ports 6 and 6 for supply in the direction of arrow Y).
Since the liquid supply port 6 is continuously provided over the entire length at the upper ends of the two side plates 51, 51, it is equal to the width of the rotating cathode drum 1, and the shape thereof extends from the liquid chamber R 3 toward the liquid flow path 8. The slit shape opens horizontally or slightly obliquely upward.

  A decompression mechanism 7 is configured inside the liquid supply apparatus 5. The decompression mechanism 7 of the present embodiment is composed of a long plate 71 having narrow portions 71a and 71a attached to both ends of the gap between the side plates 51 and 51 over the entire length of the side plate 51. By this plate material 71, the interior of the liquid supply apparatus 5 is divided into a lower liquid chamber R1 and an upper liquid chamber R3.

The operation of the metal foil electrolytic manufacturing apparatus configured as described above will be described.
The electrolytic solution flows into the lower liquid chamber R1 in the liquid supply device 5 from the liquid inlet 4 at the lower end. At this time, the electrolytic solution collides with the plate member 71 and the inflow speed is absorbed. After that, it flows into the liquid chamber R3 from the narrowed portions 71a, 71a, but is squeezed by the narrowed portion 71a to be uniform pressure and uniform flow rate, and sent to the upper liquid chamber R3. And when it flows out into the liquid flow path 8, it is further restrict | squeezed by the slit-shaped liquid supply port 6, and becomes a more uniform pressure and a more uniform flow velocity.
The electrolyte that has flowed out is divided into an upstream side X and a downstream side Y of the liquid flow passage 8 by the opening of the liquid supply port 6 and is uniformly supplied in the width direction of the rotating cathode drum 1.

FIG. 5 is a partially cutaway front view showing a second embodiment of the liquid supply port 6.
In this embodiment, recesses 61 are formed at both end portions of the upper end portion of the side plate 51. Because of the recess 61, the gap between the liquid supply ports 6 is widened at both ends, so that a large amount of electrolyte flows out. Therefore, a large amount of electrolyte is supplied to the vicinity of both ends of the rotating cathode drum 1 located in the vicinity of the recess 61, so that the foil is formed thicker than the other portions.
As a result, the problem that the foil easily tears from both ends during winding is eliminated.

FIG. 6 is a partially cutaway perspective view showing a third embodiment of the liquid supply port.
In this embodiment, the gap of the opening of the liquid supply port 6 can be adjusted. That is, an adjustment mechanism is configured in which a long adjustment plate 54 is fixed by a plurality of screws 59 along the upper ends of the two side plates 51. In this adjusting mechanism, a long hole 60 in the vertical direction is formed at an appropriate position such as an end portion of the adjusting plate 54, and a screw 59 is screwed into the long hole 60, and the adjusting plate 54 is within the range of the long hole 60. Is moved up and down for positioning. As a result, the width of the liquid supply port 6 can be freely changed.
By the action of the adjusting mechanism, the supply amount of the electrolytic solution can be easily and reliably adjusted, and the balance of the supply amount of liquid from each opening can be changed.

FIG. 7 is a partially cutaway perspective view showing a second embodiment of the decompression mechanism 7. The decompression mechanism 7 is formed by attaching a slit plate 72 having a large number of slits 72 a formed on the surface thereof so that both ends of the slit plate 72 are in close contact with the side plates 51, 51 over the entire length of the two side plates 51, 51.
According to the slit plate 72, the electrolytic solution is narrowed through the liquid flow path by the slits 72a, 72a,... And flows out from the lower liquid chamber R1 to the upper liquid chamber R3. A uniform pressure and a uniform flow rate are fed into the upper liquid chamber R3.
Although not shown, a pressure reducing means may be used by using a shielding plate, an orifice or the like instead of the slit plate 72.

FIG. 8 is a sectional front view showing a third embodiment of the decompression mechanism 7. The decompression mechanism 7 is configured by attaching a plate 73 made of a porous material in close contact with the side plates 51, 51 over the entire length of the two side plates 51, 51.
According to this plate material 73, when the electrolytic solution passes through the plate material 73 and flows from the lower liquid chamber R <b> 1 to the upper liquid chamber R <b> 3, the electrolytic solution passes through many holes and is uniform by the plate material 73. Pressure and a uniform flow rate can be fed into the upper liquid chamber R3.

FIG. 9 is a sectional front view showing a fourth embodiment of the decompression mechanism 7.
The decompression mechanism 7 is obtained by attaching a plate-like member 74 made of a filling material having a gap so that both ends thereof are in close contact with the side plates 51, 51 over the entire length of the two side plates 51, 51.
According to this plate material 74, when the electrolytic solution passes through the plate-like member 74 and flows from the lower liquid chamber R1 to the upper liquid chamber R3, the electrolytic solution passes through a large number of gaps in the filling material. Therefore, it becomes uniform pressure and uniform flow rate, and can be fed into the upper liquid chamber R3.

FIG. 10 is a sectional front view showing a fifth embodiment of the decompression mechanism 7. In this embodiment, the two plate members 71 of the first embodiment are arranged in parallel, and the liquid supply device 5 is divided into three by the two plate members 71, so that the lower liquid chamber R1 and the middle liquid chamber R2 are divided. The upper liquid chamber R3 is formed, and the width of the liquid chamber R3 is narrower than that of the liquid chamber R2.
According to this pressure reducing mechanism, compared with the pressure reducing mechanism of the first embodiment, there is an effect that the electrolyte can be more efficiently made uniform pressure and uniform flow rate by the two plate members 71.

Schematic cross-sectional side view of the metal foil electrolysis production apparatus of the first embodiment Cross-sectional front view of liquid supply device Fig. 2 III-III cross-sectional enlarged view Partial cutaway perspective view of liquid supply port Partially cutaway front view showing a second embodiment of the liquid supply port Partially cutaway perspective view showing a third embodiment of the liquid supply port Partially cutaway perspective view showing a second embodiment of the decompression mechanism Sectional front view showing a third embodiment of the decompression mechanism Sectional front view showing a fourth embodiment of the decompression mechanism Sectional front view showing a fifth embodiment of the decompression mechanism

Explanation of symbols

A Metal Foil Electrolytic Manufacturing Device 1 Rotating Cathode Drum 2 Anode 4 Liquid Inlet 5 Liquid Supply Device 6 Liquid Supply Port 7 Depressurizing Mechanism 8 Liquid Flow Path 51 Side Plate 52 Top Plate 54 Adjusting Plate 59 Screw 60 Long Hole 72 Slit Plate 72a Slit 73 Plate material 74 Plate material R1 Lower liquid chamber R2 Middle liquid chamber R3 Upper liquid chamber X Upstream side Y Downstream side

Claims (7)

A rotating cathode drum for electrodepositing metal foil, an anode having an arcuate curved surface facing the rotating cathode drum, and a liquid supply device for supplying an electrolytic solution to the liquid flow path between the rotating cathode drum and the anode are arranged. In the metal foil electrolysis production apparatus, the metal is electrodeposited on the rotating cathode drum while supplying the electrolytic solution, and the metal foil is continuously peeled off from the rotating cathode drum.
The liquid supply device is arranged in parallel with the rotation axis of the rotating cathode drum, and has a rectangular cross-section with a liquid chamber provided in an interior composed of long side plates, a top plate, and a bottom plate to which a liquid inlet is connected. The upper end is disposed in the liquid flow passage, and a slit-like gap is continuously opened between the upper ends of the side plates and the top plate, so that the electrolyte is upstream of the liquid flow passage. An apparatus for electrolytically producing metal foil, characterized in that liquid supply ports are provided to be supplied to the side and the downstream side, respectively. 2. The metal according to claim 1 , wherein a concave portion in which a part of the upper end portion is cut out and a liquid chamber and a liquid flow passage are communicated is formed at both end portions in the longitudinal direction of the upper end portion of the both side plates. Foil electrolytic production equipment. The metal foil electrolysis apparatus according to claim 1 or 2, wherein the liquid supply port is configured to be capable of adjusting a gap between the openings. The liquid supply apparatus has two or more liquid chambers continuous, between the liquid chambers arranged decompression mechanism, after the electrolyte is sequentially reduced pressure from the inlet of the liquid supply device, to flow out from the liquid supply port The metal foil electrolytic production apparatus according to claim 1, 2, or 3. 5. The metal foil electrolysis production apparatus according to claim 4, wherein the decompression mechanism has a liquid flow path narrowed by a slit plate. The metal foil electrolytic manufacturing apparatus according to claim 4, wherein the decompression mechanism is made of a porous material. The metal foil electrolytic manufacturing apparatus according to claim 4, wherein the decompression mechanism is formed of a filler having a gap.

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