TW202045775A - Metal foil production apparatus - Google Patents

Abstract

The invention tries to provide a metal foil manufacturing device that can produce a metal foil having a uniform thickness without causing localized current concentration on a surface of an electrode plate or obstructing a flow of an electrolyte. A metal foil manufacturing device which comprises an electrodeposition roller (1) configured to be freely rotatable, and an electrode body (2) arranged to face the outer periphery of the electrodeposition roller (1), wherein an electrolyte (3) is supplied between the electrodeposition roller (1) and the electrode body (2) to produce metal foils. The invention is characterized by forming a concave curved shape along the outer peripheral surface of the electrodeposition roller (1), and forming an electrode body (2) with an electrode plate (4) facing the outer peripheral surface of the electrodeposition roller (1) and an electrode plate support body (5) for supporting the electrode plate (4), using an insulating pressing member (6) and a fastening member (7) to fasten the electrode plate support body (5) to the electrode plate (4), in addition, causing the pressing member (6) and the fastening member (7) not to be protruded from the surface of the electrode plate (4).

Description

Metal foil manufacturing device

The present invention relates to a metal foil manufacturing device for manufacturing metal foil such as copper foil or silver foil.

Conventionally, for example, as disclosed in Patent Document 1, the structure has: an electrolytic cell storing the electrolyte, an electrodeposition drum (cathode) installed in the electrolytic cell and partially immersed in the electrolyte, and an outer peripheral surface of the electrodeposition drum The electrode plate (anode), which is arranged in an opposing state at a specified interval and immersed in the electrolyte, is produced by applying a voltage between the electrodeposition drum and the electrode plate to produce metal foil by electrodeposition on the outer periphery of the electrodeposition drum. The device is widely known. The electrode plate of the metal foil manufacturing apparatus having the above-mentioned configuration is generally formed by bending a metal sheet into a concave curve shape, and in order to prevent deformation, it is fastened to the surface of the electrode plate support body formed into a concave curve shape. [Prior Technical Literature] [Patent Literature] [Patent Document 1] Japanese Patent Application Publication No. 2004-332102

[The problem to be solved by the invention] Conventionally, when the electrode plate is fastened to the electrode plate support, it is common to use metal fastening members such as screws or bolts to fasten the width direction end of the electrode plate to the electrode plate support. . However, in the above-mentioned fastening structure, a fastening member is locally provided on the surface of the electrode plate, and the current is concentrated near the end of the electrode plate in the width direction on which the fastening member is provided, and the electrodes (between the cathode and the anode , That is, the uniformity of the current distribution between the electrodeposition drum and the electrode plate is decreased, which may cause uneven thickness of the produced metal foil. Furthermore, because the head of the fastening member that fastens the electrode plate to the electrode plate support is in a state where the head of the fastening member protrudes from the surface of the electrode plate, the head of the fastening member prevents the electrolyte flowing along the surface of the electrode plate. Flow, the flow of the electrolyte is not uniform, as expected, there is a possibility that the thickness of the metal foil may be uneven. The present invention was created in view of the above-mentioned current situation, and its purpose is to provide a practical metal foil that does not produce localized current concentration on the surface of the electrode plate or hinder the flow of electrolyte, and can produce a uniform thickness of metal foil Metal foil manufacturing equipment. [Means to solve the problem] The gist of the present invention will be explained in detail with reference to the drawings. In order to relate to a metal foil manufacturing device, it is provided with: an electrodeposition roller 1 that is set to freely rotate, and an electrode body 2 that is arranged to face the outer periphery of the electrodeposition roller 1. Electrolyte 3 is supplied between 2 to produce metal foil; it is characterized in that the electrode body 2 is formed in a concave curved shape along the outer peripheral surface of the electrodeposition roller 1 and faces the outer circumference of the electrodeposition roller 1 The facing electrode plate 4 and the electrode plate support body 5 supporting the electrode plate 4 are constituted. The electrode plate 4 is fastened to the electrode plate support body 5 by the insulating pressing member 6 and the fastening member 7. Furthermore, the pressing member 6 and the fastening member 7 are configured not to protrude from the surface of the electrode plate 4. Furthermore, the metal foil manufacturing apparatus of claim 1, wherein the electrode plate 4 is configured to have a recess 8 whose bottom is grounded to the electrode plate support 5; in the recess 8, the pressing member is used 6 and the aforementioned fastening member 7, the aforementioned electrode plate 4 is fastened to the aforementioned electrode plate support 5. Furthermore, the metal foil manufacturing apparatus according to claim 1, wherein a gap 9 is formed between the electrode plate 4 and the electrode plate support 5, and furthermore, a recess 8 is provided at any place of the electrode plate 4, The bottom of the recess 8 is grounded to the electrode plate support 5; in the recess 8, the electrode plate 4 is fastened to the electrode plate support 5 by the pressing member 6 and the fastening member 7. Furthermore, the metal foil manufacturing apparatus of claim 3, wherein a suitable support member 10 for supporting the electrode plate 4 is provided in the gap 9. Furthermore, the metal foil manufacturing apparatus according to claim 3, wherein the recess 8 is provided to extend in the electrode plate width direction of the electrode plate 4, and its length is set to be at least the same length as the width of the electrodeposition roller 1 . Furthermore, the metal foil manufacturing apparatus according to claim 4, wherein the recess 8 is provided to extend in the electrode plate width direction of the electrode plate 4, and the length is set to be at least the same length as the width of the electrode plate 1 . Furthermore, the metal foil manufacturing apparatus of claim 3, wherein the recess 8 is formed by bending the electrode plate 4. Furthermore, the metal foil manufacturing apparatus of claim 4, wherein the recess 8 is formed by bending the electrode plate 4. Furthermore, the metal foil manufacturing apparatus of claim 5, wherein the recess 8 is formed by bending the electrode plate 4. Furthermore, the metal foil manufacturing apparatus of claim 6, wherein the recess 8 is formed by bending the electrode plate 4. Furthermore, the metal foil manufacturing apparatus according to any one of claims 3 to 10, wherein the recess 8 is provided so as to cross the electrode plate 4 in the electrode plate width direction orthogonal to the bending direction of the electrode plate 4 Into a straight line. Furthermore, the metal foil manufacturing apparatus according to any one of claims 3 to 10, wherein the belt-shaped pressing member 6 is fitted into the concave portion 8, and the fastening member 7 penetrates the pressing member 6 to be tightened Secure to the electrode plate support 5 described above. Furthermore, the metal foil manufacturing apparatus of claim 11, wherein the belt-shaped pressing member 6 is fitted into the recess 8, and the fastening member 7 penetrates the pressing member 6 and is fastened to the electrode plate support Body 5. Moreover, as the metal foil manufacturing device of any one of claims 3 to 10, wherein the electrode plate 4 is made of a plurality of divided bodies 11, and each divided body 11 is formed by bending an L-shape on both sides thereof The portion 11a forms the concave portion 8 by facing the L-shaped portions 11a of the adjacent divided bodies 11 to each other. Moreover, the metal foil manufacturing apparatus of claim 11, wherein the electrode plate 4 is made of a plurality of divided bodies 11, and each divided body 11 is formed by bending an L-shaped portion 11a on both sides of the adjacent The L-shaped portions 11a of the divided bodies 11 face each other to form the concave portion 8. Moreover, the metal foil manufacturing apparatus of claim 12, wherein the electrode plate 4 is made of a plurality of divided bodies 11, and each divided body 11 is formed by bending an L-shaped portion 11a on both sides of the adjacent The L-shaped portions 11a of the divided bodies 11 face each other to form the concave portion 8. Furthermore, the metal foil manufacturing apparatus of claim 13, wherein the electrode plate 4 is made of a plurality of divided bodies 11, and each divided body 11 is formed by bending an L-shaped portion 11a on both sides of the adjacent The L-shaped portions 11a of the divided bodies 11 face each other to form the concave portion 8. [Invention Effect] The present invention is composed of the above-mentioned structure, and produces a metal foil manufacturing device that can produce a metal foil with a uniform thickness without causing localized current concentration on the surface of the electrode plate or obstructing the flow of the electrolyte.

According to the drawings, the effect of the present invention is shown and the ideal implementation mode of the present invention is simply explained. According to the present invention, the electrode plate 4 is fastened to the electrode plate support 5 by the insulating pressing member 6 and the fastening member 7, so that no current concentration occurs in the pressing member 6 and the fastening member 7. Furthermore, in the present invention, the pressing member 6 and the fastening member 7 that fasten the electrode plate 4 to the electrode plate support 5 do not protrude from the surface of the electrode plate 4, so they do not hinder the flow along the surface of the electrode plate 4. The flow of electrolyte 3. Furthermore, the present invention uses the pressing member 6 in combination, so it is possible to fasten the electrode plate 4 to the electrode plate support 5 stably and uniformly with fewer fastening members 7. Therefore, the present invention does not generate local current concentration on the surface of the electrode plate 4, hinder the flow of the electrolyte 3, or deform the electrode plate 4, and make a practical metal foil manufacturing device that can produce a uniform thickness of metal foil. . [Example] The specific embodiments of the present invention will be described based on the drawings. This embodiment is a metal foil manufacturing apparatus, which includes: an electrodeposition roller 1 that is set to freely rotate, and an electrode body 2 that is arranged to face the outer periphery of the electrodeposition roller 1. Electrolyte 3 is supplied between the electrode bodies 2 to produce metal foil; it is characterized in that the electrode body 2 is formed in a concave curved shape along the outer peripheral surface of the electrodeposition roller 1 and is aligned with the outer circumference of the electrodeposition roller 1 The facing electrode plate 4 and the electrode plate support body 5 supporting the electrode plate 4 are constituted. The electrode plate 4 is fastened to the electrode plate support body by an insulating pressing member 6 and a fastening member 7 5. Furthermore, the pressing member 6 and the fastening member 7 are configured not to protrude from the surface of the electrode plate 4. Specifically, the present embodiment is shown in FIG. 1, and the configuration includes: an electrodeposition roller 1 (cathode) provided in the main body 12, and a pair of left and right sides are provided on the left and right sides of the lower side of the electrodeposition roller 1 in an opposed state The electrode body 2 (anode) which is opposed to the outer peripheral surface of the electrodeposition drum 1 at a specific interval and is arranged in the body 12, and the electrolyte supply that supplies the electrolyte 3 between the electrodeposition drum 1 and the electrode body 2 Part 13, the electrolyte 3 is supplied through the electrolyte supply part 13 between the electrodeposition drum 1 and the electrode body 2 (electrode plate 4) and a voltage is applied between the electrodeposition drum 1 and the electrode body 2 (electrode plate 4), Thereby, a metal foil is produced (plated) by electrodeposition on the outer peripheral surface of the electrodeposition drum 1. In Figure 1, the symbol 14 is the rotating shaft of the electrodeposition drum 1, the symbol 15 is the support for supporting the electrode body 2 (the electrode plate support 5 for fastening the electrode plate 4), and the symbol 16 is for the recovery of the electrolyte 3 Electrolyte recovery department. Moreover, regarding this embodiment, among the constituent parts shown in FIG. 1, except for the constituent parts of the electrode body 2 (the main body 12 (including the electrolyte recovery part 16), the electrodeposition drum 1, the support 15 and the electrolyte supply part 13) It adopts a well-known structure (structure). Furthermore, in addition to the constituent parts of the electrode body 2, of course, it may be a conventional structure in which the electrodeposition drum 1 and the electrode body 2 are immersed in the electrolytic cell 19 as shown in FIG. 6. Hereinafter, the electrode body 2 related to this embodiment will be described in detail. The electrode body 2 of this embodiment is as described above to form a concave curved shape along the outer peripheral surface of the electrodeposition roller 1 and to face the electrode plate 4 facing the outer circumference of the electrodeposition roller 1 and to support the electrode plate 4 The electrode plate support body 5 is composed of a pair of left and right sides on the left and right sides of the lower side of the electrodeposition drum 1 in opposing states. The electrode plate 4 constituting the electrode body 2 is made of a thin plate-like body made of titanium, and is formed into a concave curved shape of a quarter arc corresponding to the left and right halves of the lower side of the electrodeposition drum 1. In addition, the electrode plate 4 is configured to have a plurality of recesses 8 at arbitrary positions on the surface, and the bottom of the recesses 8 is grounded to the grounding portion of the electrode plate support 5. In addition, the electrode plate 4 is configured in the recess 8 and is fastened to the electrode plate support 5 by a pressing member 6 and a fastening member 7 (for example, screws or bolts). The recess 8 is set so that the pressing member 6 and the head 7a of the fastening member 7 in the state where the electrode plate 4 is fastened to the electrode plate support 5 do not protrude to the depth of the electrode plate surface, and are formed on the electrode plate 4 The width direction of the electrodeposition roller 1 has a groove shape with a length equal to at least the width of the electrodeposition roller 1. Specifically, the recess 8 is formed by bending the electrode plate 4, and the electrode plate 4 is crossed in the electrode plate width direction orthogonal to the bending direction of the electrode plate 4 to form a straight line, and is arranged in parallel on the electrode plate 4 at intervals. The electrode surface portion 4a is arranged between the concave portions 8 in the bending direction of the curve. In addition, the recess 8 is not limited to the above-mentioned configuration, and may have any shape (circular or rectangular in plan view) at any position on the electrode plate 4, and it is not limited to bend formation and may be press forming. In addition, the electrode surface portion 4a is provided so as to be positioned above the bottom of the recess 8 to form a gap 9 between the electrode plate supports 5. That is, in this embodiment, the side surface of the electrode plate 4 is regarded as a concave-convex shape: the concave portion 8 and the electrode surface portion 4a formed as a convex portion with respect to the concave portion 8 are alternately arranged in the bending direction. Furthermore, a support member 10 for supporting the electrode plate 4 (electrode surface portion 4a) is provided in the gap 9, and the electrode plate 4 (electrode surface portion 4a) is supported by the support member 10 to prevent dent deformation and maintain a smooth curved surface. . The supporting member 10 is made of a band-shaped plate made of synthetic resin (for example, nylon, PEEK, PVC, etc.), and is provided so as to extend in the electrode plate width direction orthogonal to the bending direction of the electrode plate 4 (electrode surface portion 4a). Specifically, in this embodiment, as shown in the figure, the supporting members 10 are arranged side by side in the gap 9 at intervals, and are fastened to the electrode plate supporting body 5 by fastening members 17 such as screws or bolts. Furthermore, in this embodiment, the electrode plate 4 is bent slightly strongly, and the height of the support member 10 is used to adjust the bending tolerance of the electrode plate 4. In addition, the electrode plate 4 can be made of a single plate, or it can be formed by arranging a plurality of divided bodies 11 in parallel. In this embodiment, the latter is formed by using a plurality of divided bodies 11. The split body 11 is composed of a long horizontally long plate in the electrode plate width direction orthogonal to the bending direction of the electrode plate 4, and the electrode plate support body 5 is interposed in the bending direction of the electrode plate support body 5. The electrode plates 4 are arranged side by side at specific intervals. Specifically, the split body 11 is formed by bending: the L-shaped portions 11a are in a state of facing away from each other at the two long side portions that become both sides in the bending direction. That is, the electrode plate 4 of this embodiment has a configuration: formed on the electrode plate support 5, and the divided bodies 11 are arranged in parallel at a certain interval in the bending direction of the electrode plate support 5, and are arranged in parallel on the electrode The concave portion 8 is formed in such a manner that the adjacent L-shaped portions 11 a of the divided body 11 on the plate support body 5 coincide with each other. Next, each electrode plate 4 formed by the plurality of divided bodies 11 has a structure: the belt-shaped pressing member 6 fitted in the recess 8 is fastened to the electrode plate support 5 by the fastening member 7 Here, the horizontal portion of the L-shaped portion 11 a at the bottom of the recess 8 is pressed and fixed by the pressing member 6, and is fastened and fixed to the electrode plate support 5. In this embodiment, the fastening member 7 and the pressing member 6 that fasten the electrode plate 4 to the electrode plate support 5 are each having insulating properties. Specifically, the fastening member 7 uses a male screw 7 made of synthetic resin, and in this embodiment, a male screw 7 made of PEEK resin is used. In addition, the pressing member 6 is also made of synthetic resin (made of PEEK resin) like the fastening member 7 (male screw 7), and a strip-shaped plate having a cross-sectional shape that substantially matches the cross-sectional shape of the recess 8 is formed. Specifically, the pressing member 6 is set to a height that does not protrude from the recessed portion 8 (when it is fitted into the recessed portion 8, the height of the same surface as the electrode surface portion 4a), and is perforated at predetermined intervals in the longitudinal direction. The through hole 11a of the male screw 7 is inserted, and further, a screw head receiving portion 6b for receiving the head 7a of the male screw 7 is formed on the upper part of the through hole 6a. That is, the present embodiment has a configuration: the pressing member 6 is tightly fitted into the recess 8 of the electrode plate 4, and the male screw 7 is used to fasten it. When the electrode plate 4 is fixed to the electrode plate support 5, the male The head 7a of the screw 7 is accommodated in the screw head accommodation portion 6b of the pressing member 6 and becomes the same surface as the upper surface of the pressing member 6, and is further arranged such that the pressing member 6 and the electrode surface 4a of the electrode plate 4 become The same surface, therefore, does not protrude onto the surface of the electrode plate 4, and the surface of the electrode plate 4 becomes a smooth concave curved surface state. Furthermore, in this embodiment, the configuration is as described above, and the electrode plate 4 (divided body 11) is fastened to the electrode plate support 5 by the pressing member 6 and the fastening member 7 (male screw 7), but it may be It is a structure that does not use the pressing member 6, that is, the head 7a of the insulating fastening member 7 (male screw 7) is made into an appropriate size, and the head 7a is not separated from the electrode plate 4. The structure of the pressing member 6 is omitted in a way that the surface protrudes. In addition, the electrode plate support body 5 for fastening and fixing the electrode plate 4 constructed as described above is made of titanium like the electrode plate 4, and is formed into a 1/4 arc shape corresponding to the left and right halves of the lower side of the electrodeposition drum 1. Concave curved shape. Moreover, the electrode plate support body 5 is set on the surface of the aforementioned supporting member 10 at a specific position, and further screwed the male screw 7 for fastening the electrode plate 4 (pressing member 6) to the screw hole 18 at the predetermined position. The state of not penetrating the electrode plate support 5. Specifically, the screw holes 18 are provided on a straight line along the opposing gaps of the adjacent L-shaped portions 11a of the divided bodies 11 arranged side by side on the electrode plate support body 5. In addition, the electrode body 2 of this embodiment constructed as described above is formed as follows. On the electrode plate support body 5, the divided bodies 11 are arranged in parallel with a certain interval in the bending direction of the electrode plate support body 5. Next, the pressing member 6 is fitted into the recess 8 formed by the facing L-shaped portion 11a of the adjacent divided body 11, and the horizontal portion of each L-shaped portion 11a is sandwiched by the pressing member 6 to the electrode plate Support 5. Next, the male screws 7 are penetrated to the through holes 11a provided in the pressing member 6, and the male screws 7 are screwed to the screw holes provided between the horizontal portions of the opposite L-shaped portions 11a of the electrode plate support body 5. 18. Fasten the pressing member 6 to the electrode plate support 5. Through this, the horizontal portion of the L-shaped portion 11 a of the divided body 11 is pressed and fixed by the pressing member 6, the divided body 11 is fastened to the electrode plate support 5 to form the electrode plate 4, and the electrode body 2 is formed. Moreover, the metal foil manufacturing apparatus of this embodiment having such an electrode body 2 is because the fastening member 7 (male screw 7) and the supporting member 10 that fasten the electrode plate 4 to the electrode plate support body 5 are insulating Therefore, no local current concentration occurs in the fastening member 7 and the supporting member 10. Furthermore, the above-mentioned fastening member 7 and supporting member 10 are housed in the recess 8 formed in the electrode plate 4, and are set to be the same surface as the surface of the electrode plate 4. Therefore, there are almost no irregularities on the surface of the electrode plate 4 and become slippery In a smooth surface state, along the surface of the electrode plate 4, the electrolyte 3 flows smoothly. This embodiment is constructed as described above. Therefore, there is no local current concentration or obstruction to the flow of the electrolyte 3 on the surface of the electrode plate 4, and a metal foil of uniform thickness can be produced, and the pressing member 6 For this reason, the electrode plate 4 can be fastened to the electrode plate support body 5 stably and uniformly with fewer fastening members 7. Moreover, in this embodiment, the screw holes 18 of the male screws 7 that fasten the electrode plate 4 (divided body 11) to the electrode plate support body 5 do not penetrate through the electrode plate support body 5, so no passing through the screw holes occurs. 18. The electrolyte solution 3 leaks to the back side of the electrode plate support 5. Furthermore, the grounding part of the electrode plate support body 5 with the electrode plate 4, that is, the horizontal part of the L-shaped part 11a of the divided body 11 covers the entire area, and the pressing member 6 is closely fixed to the electrode plate support body 5. Therefore, a malfunction caused by the electrolyte 3 infiltrating the back side of the electrode plate 4 does not occur. In this way, the electrolyte 3 does not go back and forth between the front and back of the electrode plate 4 or the electrode plate support 5, and the concentration of the electrolyte 3 between the electrodeposition drum 1 and the electrode body 2 (electrode plate 4) is stable and stable. Uniform reaction, and, as in this embodiment, when the electrode body 2 is a structure that also serves as an electrolytic cell, the power supply device can be mounted on the back of the electrode body 2 (electrode plate support 5) to achieve compactness Device composition. Moreover, as described above, the horizontal portion of the L-shaped portion 11a of each divided body 11 is pressed and fixed by the pressing member 6 so that the fastening member 7 (male screw 7) does not penetrate the electrode plate 4 (divided body). 11) By this, even if the fastening members 7 are not removed one by one, the divided body 11 can be removed from the electrode plate support 5 by just loosening, and a metal foil manufacturing apparatus with excellent maintainability is made. Furthermore, the present invention is not limited to this embodiment, and the specific structure of each constituent element can be appropriately designed.

1: Electrodeposition roller 2: Electrode body 3: electrolyte 4: Electrode plate 5: Electrode plate support 6: Pushing member 7: Fastening member 8: recess 9: gap 10: Supporting member 11: Split body 11a: L part

[Fig. 1] A front cross-sectional view showing the outline of this embodiment. [Fig. 2] A perspective view showing the electrode body (one side) of this embodiment. [FIG. 3] An explanatory exploded view showing the electrode body of this embodiment. [Fig. 4] A front cross-sectional view showing the important part of the electrode body of this embodiment. [Fig. 5] A perspective view showing a state in which divided bodies are arranged in parallel to the electrode plate support of this embodiment. [Fig. 6] A schematic explanatory front cross-sectional view showing another configuration example of the present embodiment.

1: Electrodeposition roller

2: Electrode body

3: electrolyte

4: Electrode plate

5: Electrode plate support

6: Pushing member

9: gap

10: Supporting member

12: body

13: Electrolyte supply part

14: Rotation axis

15: Support

16: Electrolyte Recovery Department

Claims (17)

A metal foil manufacturing apparatus, comprising: an electrodeposition roller provided to freely rotate, and an electrode body arranged to face the outer periphery of the electrodeposition roller, and an electrolyte is supplied between the electrodeposition roller and the electrode body A metal foil is produced; it is characterized in that the electrode system is formed in a concave curved shape along the outer peripheral surface of the electrodeposition roller and an electrode plate facing the outer circumference of the electrodeposition roller and an electrode plate supporting the electrode plate The electrode plate is fastened to the electrode plate support body by an insulating pressing member and a fastening member, and further, the pressing member and the fastening member are configured not to be from the electrode plate The surface is prominent. The metal foil manufacturing device of claim 1, wherein the electrode plate is configured to have a recessed portion, and the bottom of the recessed portion is grounded to the electrode plate support; in the recessed portion, the pressing member and the fastening member are used, The electrode plate is fastened to the aforementioned electrode plate support. The metal foil manufacturing apparatus according to claim 1, wherein a gap is formed between the electrode plate and the electrode plate support, and further, a recess is provided at any place of the electrode plate, and the bottom of the recess is the same as the aforementioned The electrode plate support is grounded; in the recess, the electrode plate is fastened to the electrode plate support by the pressing member and the fastening member. The metal foil manufacturing apparatus of claim 3, wherein a suitable supporting member for supporting the electrode plate is provided in the gap. The metal foil manufacturing apparatus according to claim 3, wherein the recess is provided to extend in the electrode plate width direction of the electrode plate, and its length is set to be at least the same length as the width of the electrodeposition roller. The metal foil manufacturing apparatus according to claim 4, wherein the concave portion is provided to extend in the electrode plate width direction of the electrode plate, and the length is set to be at least the same length as the width of the electrodeposition roller. The metal foil manufacturing apparatus according to claim 3, wherein the concave portion is formed by bending the electrode plate. The metal foil manufacturing apparatus according to claim 4, wherein the concave portion is formed by bending the electrode plate. The metal foil manufacturing apparatus according to claim 5, wherein the concave portion is formed by bending the electrode plate. The metal foil manufacturing apparatus of claim 6, wherein the recessed portion is formed by bending the electrode plate. The metal foil manufacturing apparatus according to any one of claims 3 to 10, wherein the recessed portion is provided in a straight line shape as it crosses the electrode plate in the electrode plate width direction orthogonal to the bending direction of the electrode plate. The metal foil manufacturing apparatus according to any one of claims 3 to 10, wherein the belt-shaped pressing member is fitted into the recess, and the fastening member penetrates the pressing member and is fastened to the electrode plate support body. The metal foil manufacturing apparatus of claim 11, wherein the belt-shaped pressing member is fitted into the recess, and the fastening member penetrates the pressing member and is fastened to the electrode plate support. The metal foil manufacturing device of any one of claims 3 to 10, wherein the electrode plate is made of a plurality of divided bodies, and each divided system is bent to form an L-shaped portion on both sides of the The L-shaped portions of the divided bodies face each other to form the aforementioned recesses. The metal foil manufacturing apparatus of claim 11, wherein the electrode plate is made of a plurality of divided bodies, and each divided system is bent to form an L-shaped part on both sides, and the adjacent L-shaped part of the divided body The aforementioned recesses are formed facing each other. The metal foil manufacturing device of claim 12, wherein the electrode plate is made of a plurality of divided bodies, and each divided system is bent to form an L-shaped part on both sides, and the adjacent L-shaped part of the divided body The aforementioned recesses are formed facing each other. The metal foil manufacturing apparatus of claim 13, wherein the electrode plate is made of a plurality of divided bodies, and each divided system is bent to form an L-shaped part on both sides, and the adjacent L-shaped part of the divided body The aforementioned recesses are formed facing each other.

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