JP6970603B2 - Metal leaf manufacturing equipment, electrode plate and metal leaf manufacturing method - Google Patents

Description

The present invention relates to a metal leaf manufacturing apparatus, an electrode plate, and a method for manufacturing a metal foil.

Conventionally, for example, as disclosed in Patent Document 1, an electrolytic cell in which an electrolytic solution is stored, an electrodeposition drum (cathode) provided in the electrolytic cell so that a part of the electrolytic cell is immersed in the electrolytic cell, and the electrodeposition thereof. It has an electrode plate (acoustic) that is provided so as to face the outer peripheral surface of the drum at predetermined intervals and is immersed in the electrolytic solution, and the outer periphery of the electrodeposition drum is applied by applying a voltage between the electrodeposition drum and the electrode plate. A metal foil manufacturing apparatus that electrolyzes and generates a metal foil on a surface is known.

By the way, such a metal foil manufacturing apparatus has individuality for each apparatus, and even if the outer peripheral surface of the electrodeposition drum and the electrode plate (the surface facing the electrodeposition drum) are processed with high accuracy, the metal foil is produced. The thickness (foil thickness in the width direction of the outer peripheral surface of the electrodeposited drum) has a certain deviation for each device.

Therefore, conventionally, for example, a plurality of auxiliary anodes are added near the upper end of the electrode plate and these are individually controlled (Patent Documents 1 and 2), or a shielding plate that suppresses the formation of metal foil is used as an electrodeposition drum. By providing it between the electrode plate and the metal foil (Patent Document 3) and increasing or decreasing the amount of metal foil generated at a desired portion, the foil thickness is made uniform in the width direction of the outer peripheral surface of the electrodeposited drum.

However, when the auxiliary anode is controlled individually from the electrode plate, it is necessary to procure a power supply and a control mechanism separately, and the introduction is very costly. In addition, when using a shielding plate, it is necessary to carry out a test to confirm the individuality of the completed metal leaf manufacturing equipment, and to design and manufacture the shape of the shielding plate based on this test result. It takes a lot of effort to design.

Japanese Unexamined Patent Publication No. 2012-107266 Japanese Patent No. 34166620 Japanese Unexamined Patent Publication No. 9-143784

The present invention has been made in view of the current situation as described above, and by producing a plurality of types of subdivided bodies having different coating modes of the conductive coating film in advance according to the individuality of the apparatus, the electrodeposition drum can be cost-effectively. It provides an extremely practical metal leaf manufacturing apparatus, an electrode plate, and a metal foil manufacturing method capable of adjusting the foil thickness in the width direction of the outer peripheral surface of the metal leaf.

The gist of the present invention will be described with reference to the accompanying drawings.

The electrolytic cell 2 in which the electrolytic solution 1 is stored, the electrodeposition drum 3 provided in the electrolytic cell 2, and the electrode plate 4 provided in the electrolytic cell 2 so that the surface faces the outer peripheral surface of the electrodeposition drum 3. The surface of the electrode plate 4 is set to a concave curved surface along the outer peripheral surface of the electrodeposition drum 3, and the surface of the electrode plate 4 is covered with a conductive coating film. 13 is covered, and the electrode plate 4 has a divided structure in which a plurality of divided bodies 10 and 11 having a predetermined width in the axial direction of the electrodeposition drum 3 and having a predetermined length in the vertical direction are arranged side by side. Further, at least one of the divided bodies 10 and 11 has a subdivided structure in which a plurality of further subdivided subdivided bodies 12 are arranged side by side, and the subdivided body 11 having this subdivided structure is the conductive coating film. The present invention relates to a metal foil manufacturing apparatus, which is configured by combining a plurality of types of the subdivided bodies 12 having different coating modes of 13.

Further, in the metal foil manufacturing apparatus according to claim 1, a winding unit 14 for peeling and winding the metal leaf A generated by electrodeposition is provided on the outer peripheral surface of the electrodeposition drum 3, and the metal by the winding unit 14 is provided. The present invention relates to a metal leaf manufacturing apparatus characterized in that the divided body 11 closest to the peeling position X of the foil A has the finely divided structure.

Further, in the metal leaf manufacturing apparatus according to any one of claims 1 and 2, a plurality of the electrode plates 4 are arranged side by side along the outer peripheral surface of the electrodeposition drum 3, and the most of the electrode plates 4 thereof. The present invention relates to a metal leaf manufacturing apparatus characterized in that each of the upper divided bodies 11 has the above-mentioned subdivided structure.

Further, in the metal leaf manufacturing apparatus according to any one of claims 1 to 3, the subdivided body 12 relates to the metal foil manufacturing apparatus, each of which is connected to the same power source.

Further, in the metal leaf manufacturing apparatus according to any one of claims 1 to 4, at least one or more of the divided bodies 11 having the finely divided structure are not provided with the conductive coating film 13 in whole or in part. The present invention relates to a metal leaf manufacturing apparatus comprising the subdivided body 12 of the above.

Further, in the metal leaf manufacturing apparatus according to claim 5, a titanium oxide film is provided at a portion of the subdivided body 12 where the conductive coating film 13 is not provided. It is related to.

Further, the electrolytic tank 2 in which the electrolytic solution 1 is stored, the electrodeposition drum 3 provided in the electrolytic tank 2, and the electrodes provided in the electrolytic tank 2 so that the surface faces the outer peripheral surface of the electrodeposition drum 3. The electrode plate 4 in a metal foil manufacturing apparatus having a plate 4 and a winding portion 14 for peeling and winding the metal foil A electrolyzed and generated on the outer peripheral surface of the electrodeposition drum 3. The electrode plate 4. The surface of 4 is set to a concave curved surface along the outer peripheral surface of the electrodeposition drum 3, and the surface of the electrode plate 4 is coated with a conductive coating film 13, and the electrode plate 4 is further electrolyzed. It has a divided structure in which a plurality of divided bodies 10 and 11 having a predetermined width in the axial direction of the landing drum 3 and having a predetermined length in the vertical direction are arranged side by side, and at least one of the divided bodies 10 and 11. Is a subdivided structure in which a plurality of further subdivided subdivided bodies 12 are arranged side by side, and the subdivided body 11 having this subdivided structure is a plurality of types of the subdivided bodies 12 having different coating modes of the conductive coating film 13. The present invention relates to an electrode plate characterized by being configured by combining the above.

Further, in the electrode plate according to claim 7, the electrode plate is characterized in that the divided body 11 closest to the peeling position X of the metal leaf A by the winding portion 14 has the subdivided structure. ..

Further, in the electrode plate according to any one of claims 7 and 8, a plurality of the electrode plates 4 are arranged side by side along the outer peripheral surface of the electrodeposition drum 3, and the uppermost side of each of the electrode plates 4 is provided. The present invention relates to an electrode plate characterized in that each of the divided bodies 11 has the above-mentioned subdivided structure.

Further, in the electrode plate according to any one of claims 7 to 9, the subdivided body 12 is related to an electrode plate characterized in that each of the subdivided bodies 12 is connected to the same power source.

Further, in the electrode plate according to any one of claims 7 to 10, at least one or more of the divided bodies 11 having the subdivided structure are not provided with the conductive coating film 13 in whole or in part. It relates to an electrode plate characterized by containing the subdivided body 12.

The present invention relates to the electrode plate according to claim 11, wherein a titanium oxide film is provided at a portion of the subdivided body 12 where the conductive coating film 13 is not provided. be.

Further, the electrolytic tank 2 in which the electrolytic solution 1 is stored, the electrodeposition drum 3 provided in the electrolytic tank 2, and the electrodes provided in the electrolytic tank 2 so that the surface faces the outer peripheral surface of the electrodeposition drum 3. It is a method of manufacturing a metal foil using a metal foil manufacturing apparatus having a plate 4, and the surface of the electrode plate 4 is set to a concave curved surface along the outer peripheral surface of the electrodeposition drum 3, and the electrode is also set. The surface of the plate 4 is coated with a conductive coating film 13, and further, the electrode plate 4 has a width of a predetermined length in the axial direction of the electrodeposition drum 3 and a length of the divided bodies 10 and 11 having a predetermined length. Is a divided structure in which a plurality of the divided bodies 10 and 11 are arranged side by side, and at least one of the divided bodies 10 and 11 is a subdivided structure in which a plurality of further divided subdivided bodies 12 are arranged side by side. By appropriately combining and arranging a plurality of types of the subdivided bodies 12 having different coating modes of the film 13, the degree of energization between the electrode plate 4 and the outer peripheral surface of the electrodeposition drum 3 is adjusted to adjust the degree of energization of the electrodeposition drum 3. The present invention relates to a method for producing a metal foil, which comprises forming the metal foil A having a thickness as uniform as possible on the outer peripheral surface by electrodeposition.

As described above, in the present invention, by producing a plurality of types of subdivided bodies having different coating modes of the conductive coating film in advance according to the individuality of the apparatus, the foil in the width direction of the outer peripheral surface of the electrodeposition drum can be inexpensively produced. It is an extremely practical metal foil manufacturing device, electrode plate, and metal foil manufacturing method that can adjust the thickness.

It is schematic explanation side sectional drawing of this Example. It is a schematic explanatory drawing explaining the arrangement example of the divided body and the subdivided body. It is a schematic explanatory drawing explaining the arrangement example of the divided body and the subdivided body. It is a schematic explanatory drawing explaining the arrangement example of the divided body and the subdivided body. It is a schematic explanatory drawing explaining the arrangement example of the divided body and the subdivided body. It is a schematic explanatory drawing of the conventional example.

Embodiments of the present invention which are considered to be suitable will be briefly described by showing the operation of the present invention based on the drawings.

The electrode body 4 has a portion where the conductive coating film 13 is present and a portion where the conductive coating film 13 is not present, and the portion where the conductive coating film 13 is provided is the outer peripheral surface of the opposed electrodeposition drum 3 (via the electrolytic solution 1). It is well energized, and it is difficult to energize the portion without the conductive coating film 13. Therefore, among the divided bodies 10 and 11 of the electrode body 4, the divided body 11 having the subdivided structure is present with the portion where the conductive coating film 13 is present by appropriately combining the subdivided bodies 12 according to the individuality of the apparatus. The degree of energization with the outer peripheral surface of the electrodeposition drum 3 can be adjusted by easily and freely setting the parts that do not, and the foil thickness in the width direction of the outer peripheral surface of the electrodeposition drum 3 can be adjusted without the need to use an auxiliary anode or a shielding plate separately. It becomes possible to make it uniform.

That is, for example, if there is a portion where the foil thickness becomes thicker in the width direction of the outer peripheral surface of the electrodeposition drum 3 due to the individuality of the electrodeposition drum 3, the conductive coating film 13 is provided at a position corresponding to that portion. If there is a part where the foil thickness becomes thin, place the subdivided body 12 provided with the conductive coating film 13 at the position corresponding to the part, and place the subdivided body 12 between them. A simple task of appropriately combining a plurality of types of subdivided bodies 12 prepared in advance, such as arranging a subdivided body 12 provided with a conductive coating film 13 at a position corresponding to that part. Therefore, the foil thickness can be adjusted according to the individuality of the device such as the electrodeposition drum 3, and thus it is possible to obtain a metal foil as uniform as possible.

Specific examples of the present invention will be described with reference to the drawings.

In this embodiment, the electrolytic cell 2 in which the electrolytic solution 1 is stored, the electrodeposition drum 3 provided in the electrolytic cell 2, and the inside of the electrolytic cell 2 so that the surface faces the outer peripheral surface of the electrodeposition drum 3. A metal foil manufacturing apparatus having an electrode plate 4 provided, the surface of the electrode plate 4 is set to a concave curved surface along the outer peripheral surface of the electrodeposition drum 3, and the surface of the electrode plate 4 is set to a concave curved surface. Is coated with a conductive coating film 13, and further, the electrode plate 4 is provided with a plurality of divided bodies 10 and 11 having a predetermined width in the axial direction and a predetermined length in the vertical direction of the electrodeposition drum 3. Further, at least one of the divided bodies 10 and 11 is a subdivided structure in which a plurality of further subdivided subdivisions 12 are arranged side by side, and the subdivided body 11 of this subdivided structure is The conductive coating film 13 is configured by combining a plurality of types of the subdivided bodies 12 having different coating modes.

That is, in this embodiment, as shown in FIG. 1, an electrolytic cell 2 in which the electrolytic cell 1 (copper sulfate solution) is stored and an electric electrode provided in the electrolytic cell 2 so that a part of the electrolytic cell 1 is immersed in the electrolytic cell 1 are provided. It has an electrodeposition drum 3 (cathode) and an electrode plate 4 (anode) provided so as to face the outer peripheral surface of the electrodeposition drum 3 at predetermined intervals and immersed in the electrolytic solution 1, and the electrodeposition drum 3 and the electrode plate. A metal foil A (copper foil) is electrolyzed (plated) on the outer peripheral surface of the electrodeposition drum 3 by applying a voltage between the electrode plate 4 and the electrode plate 4 to have a predetermined shape. .. The metal foil A having a predetermined thickness is peeled off from the electrodeposition drum 3 at the peeling position X by the take-up portion 14, and is taken up by the take-up roll 15. Reference numeral 16 in the figure is a guide roll.

Further, a plurality of electrode plates 4 are arranged side by side along the outer peripheral surface of the electrodeposition drum 3. In this embodiment, a pair of left and right electrode plates 4 are provided so as to face the left side and the right side of the immersion portion of the electrodeposition drum 3, respectively. The surface of the electrode plate 4 is set to a concave curved surface corresponding to the outer peripheral surface of the electrodeposition drum 3.

In the figure, reference numeral 5 is a substrate on which the electrode plate 4 is provided, 7 is a liquid supply unit that supplies the electrolytic solution 1 to the facing gap between the electrodeposition drum 3 and the electrode plate 4, 8 is the rotation axis of the electrodeposition drum 3, and 9 is. It is a support that supports the substrate 5 to which the electrode plate 4 is attached.

Each part will be explained concretely.

The electrode plate 4 is made of titanium and has a divided structure composed of a plurality of rectangular (strip-shaped) divided bodies 10 and 11 divided in the longitudinal direction (circumferential direction of the electrodeposition drum 3). At least one of them has a subdivided structure composed of a square subdivided body 12 further divided in the width direction (see FIGS. 2 to 5). The vertical length of the divided bodies 10 and 11 is set according to the number of divided parts of the electrode plate 4, and the horizontal width is set to be the same as or slightly wider than the width of the electrodeposited drum 3. The subdivided body 11 having this subdivided structure is configured by combining a plurality of types of the subdivided bodies 12 having different coating modes (methods) of the conductive coating film 13.

Further, in this embodiment, at least the divided body 11 closest to the peeling position X of the metal foil A by the winding portion 14 has the finely divided structure (at least in order to make fine adjustments at the final stage of the electrodeposition generation process of the metal foil). .). Specifically, among the electrode plates 4, the divided bodies 11 on the uppermost side (liquid surface side of the electrolytic solution 1) each have the subdivided structure.

Further, the divided body 11 having a subdivided structure may be configured to be composed of at least two or more, preferably five or more subdivided bodies 12. In this embodiment, it is composed of six subdivided bodies 12. Further, each of the subdivided bodies 12 is connected to the same power source (not shown). This power supply is common to the other divided bodies 10, and does not specially control only the subdivided body 12, but the divided bodies 10 and 11 are controlled in the same manner.

A conductive coating film 13 (iridium oxide coating film) is formed (coated) on the facing surface (surface) of each of the divided bodies 10 and 11 with the outer peripheral surface of the electrodeposition drum 3. In addition, another conductive coating film 13 may be adopted. The conductive coating film 13 of this example is formed by baking coating (heating at 120 ° C to 200 ° C for 30 minutes or more to cure and dry). At this time, a titanium oxide film is formed at the same time in the portions of the divided bodies 10 and 11 where the conductive coating film 13 is not provided. Due to this titanium oxide film, the portion without the conductive coating film 13 has good corrosion resistance and is more difficult to energize.

In the conductive coating film 13, the divided body 10 having a subdivided structure is provided on the entire surface of the facing surface (surface), and the divided body 11 having the subdivided structure is provided on a part of the facing surface (surface). ing.

That is, in this embodiment, the subdivided body 12 to which the conductive coating film 13 is not provided, or the conductive coating film 13 is provided only partially (the conductive coating film 13 is partially included). Does not include at least one of the subdivisions 12.

Therefore, as the subdivided body 12, one is provided with a conductive coating film 13 on the entire surface (whole surface coating), one without any conductive coating film 13 (no coating), and one conductive coating film 13. There are three types (partially coated) that are provided only in the area of the part.

In this embodiment, the partial coating is configured such that the conductive coating film 13 is mainly provided on 50% of the surface, and the area where the conductive coating film 13 is provided is a line or a diagonal line connecting the midpoints of the opposite sides. Although the configuration is shown in which the region is divided into the region and the region not provided, the ratio is not limited to this, and the ratio of the area where the conductive coating film 13 is provided can be appropriately set to, for example, about 10% to 90% of the surface. Further, the planar shape of the conductive coating film 13 can be appropriately set. That is, the coating mode of the conductive coating film 13 is appropriately changed by changing the ratio of the conductive coating film 13 on the surface of the subdivided body 12, the planar shape of the coated portion (or the uncoated portion), the coating film thickness, and the like. Can be set.

As shown in FIGS. 2 to 5, the film thickness of the subdivided body 12 can be adjusted according to the individuality of the apparatus by arranging the subdivided body 12 with a full surface coating, no coating, or a partial coating in any combination. For example, the simplest arrangement is shown in FIG. 2, in which the entire surface is coated on both ends and the uncoated portion is arranged in the center, and the current flows in the center as compared with the widthwise ends of the outer peripheral surface of the electrodeposition drum 3. It suppresses the electric current and reduces the amount of metal foil produced in the central part to make the foil thickness uniform. FIG. 3 is for finely adjusting the current suppression amount at both ends from FIG. 2, and FIGS. 4 and 5 are for finely adjusting the current suppression amount at the central portion from FIG.

Note that FIG. 6 shows a conventional electrode plate 4'without using the divided body 11 having a finely divided structure, and the conventional electrode plate 4'is a conductive coating film 13 uniformly on the entire surface of all the divided bodies 10'. 'Is provided. In this case, it is necessary to separately prepare an auxiliary anode and a shielding plate for adjusting the foil thickness.

Further, although it is possible to adjust the degree of energization by setting the presence or absence of a film and the film thickness for each part of the divided body 10'of the conventional electrode plate 4'or the conventional single plate electrode plate. It is necessary to prepare a divided body 10'or a single electrode plate according to the individuality of each device, which is inferior in costability as compared with the present embodiment.

Since this embodiment is configured as described above, among the divided bodies 10 and 11 of the electrode body 4, the divided body 11 having a subdivided structure is conductive by appropriately combining the subdivided bodies 12 according to the individuality of the apparatus. The portion where the sex coating film 13 exists and the portion where it does not exist can be easily and freely set to adjust the degree of energization with the outer peripheral surface of the electrodeposition drum 3, and the electrodeposition drum 3 does not need to use an auxiliary anode or a shielding plate separately. It is possible to make the foil thickness uniform in the width direction of the outer peripheral surface of the surface.

Therefore, according to this embodiment, by making the foil thickness uniform, it is possible to suppress stretching wrinkles and discoloration due to variations in the metal foil thickness, and moreover, many electric circuits (DC stabilized power supply and current control system) are required. However, it is possible to suppress an increase in introduction cost, shorten the period required for designing and manufacturing after the completion of the device like a shielding plate, and suppress opportunity loss.

Therefore, in this embodiment, by producing a plurality of types of subdivided bodies having different coating modes of the conductive coating film in advance according to the individuality of the apparatus, the foil thickness in the width direction of the outer peripheral surface of the electrodeposition drum can be reduced at low cost. It becomes extremely practical that the adjustment of is possible.

1 Electrolyte 2 Electrolytic cell 3 Electroplated drum 4 Electrode plate
10 splits
11 splits
12 subdivisions
13 Conductive coating film
14 Winding part A Metal leaf X Peeling position

Claims (13)

A metal foil manufacturing apparatus having an electrolytic cell for storing an electrolytic solution, an electrodeposition drum provided in the electrolytic cell, and an electrode plate provided in the electrolytic cell so that the surface of the electrolytic cell faces the outer peripheral surface of the electrolytic cell. The surface of the electrode plate is set to a concave curved surface along the outer peripheral surface of the electrodeposition drum, and the surface of the electrode plate is coated with a conductive coating film, and the electrode plate is further covered with a conductive coating film. A plurality of divided bodies having a predetermined width in the axial direction and a predetermined length in the vertical direction are arranged side by side in the electrodeposition drum, and at least one of the divided bodies is further divided. A plurality of subdivided bodies are arranged side by side in a subdivided structure, and the subdivided body of this subdivided structure is configured by combining a plurality of types of the subdivided bodies having different coating modes of the conductive coating film. Characterized metal foil manufacturing equipment. The metal leaf manufacturing apparatus according to claim 1 is provided with a winding portion on the outer peripheral surface of the electrodeposition drum for peeling and winding the metal foil generated by electrodeposition, and is most located at the peeling position of the metal foil by this winding portion. A metal leaf manufacturing apparatus characterized in that the near-divided body has the subdivided structure. In the metal leaf manufacturing apparatus according to any one of claims 1 and 2, a plurality of the electrode plates are arranged side by side along the outer peripheral surface of the electrodeposition drum, and the uppermost divided body of the electrode plates is provided. The metal leaf manufacturing apparatus, each of which has the above-mentioned subdivided structure. The metal leaf manufacturing apparatus according to any one of claims 1 to 3, wherein the subdivided bodies are connected to the same power source. In the metal leaf manufacturing apparatus according to any one of claims 1 to 4, at least one of the subdivided bodies having the subdivided structure is not provided with the conductive coating film in whole or in part. A metal leaf manufacturing device characterized by including a body. The metal leaf manufacturing apparatus according to claim 5, wherein a titanium oxide film is provided at a portion of the subdivided body where the conductive coating film is not provided. The electrolytic tank in which the electrolytic solution is stored, the electrodeposition drum provided in the electrolytic tank, the electrode plate provided in the electrolytic tank so that the surface faces the outer peripheral surface of the electrodeposition drum, and the electrodeposition drum. The electrode plate in a metal foil manufacturing apparatus having a winding portion for peeling and winding the electrodeposited metal foil on the outer peripheral surface, and the surface of the electrode plate is along the outer peripheral surface of the electrodeposition drum. The surface of the electrode plate is set to a concave curved surface, and the surface of the electrode plate is coated with a conductive coating film. Further, the electrode plate has a width of a predetermined length in the axial direction of the electrodeposition drum and a predetermined length in the vertical direction. In addition, at least one of the divided structures is a subdivided structure in which a plurality of subdivided bodies having a plurality of subdivided bodies are arranged side by side. The divided body is an electrode plate characterized in that it is formed by combining a plurality of types of the finely divided bodies having different coating modes of the conductive coating film. The electrode plate according to claim 7, wherein the divided body closest to the peeling position of the metal foil by the winding portion has the subdivided structure. In the electrode plate according to any one of claims 7 and 8, a plurality of the electrode plates are arranged side by side along the outer peripheral surface of the electrodeposition drum, and the uppermost divided body of each of the electrode plates is formed. An electrode plate characterized by having the subdivided structure. The electrode plate according to any one of claims 7 to 9, wherein the subdivided bodies are connected to the same power source. In the electrode plate according to any one of claims 7 to 10, the subdivided body having the subdivided structure includes at least one or more subdivided bodies to which the conductive coating film is not provided in whole or in part. An electrode plate characterized by including. The electrode plate according to claim 11, wherein a titanium oxide film is provided at a portion of the subdivided body where the conductive coating film is not provided. A metal foil manufacturing apparatus having an electrolytic tank for storing an electrolytic solution, an electrodeposition drum provided in the electrolytic tank, and an electrode plate provided in the electrolytic tank so that its surface faces the outer peripheral surface of the electrodeposition drum. The surface of the electrode plate is set to a concave curved surface along the outer peripheral surface of the electrodeposition drum, and the surface of the electrode plate is coated with a conductive coating film. Further, the electrode plate has a divided structure in which a plurality of divided bodies having a predetermined width in the axial direction of the electrodeposition drum and a predetermined length in the vertical direction are arranged side by side, and among the divided bodies. At least one is a subdivided structure in which a plurality of further subdivided bodies are arranged side by side, and the plurality of types of the subdivided bodies having different coating modes of the conductive coating film are appropriately combined and arranged. A metal foil characterized by adjusting the degree of energization between the electrode plate and the outer peripheral surface of the electrodeposition drum to electrodeposit and generate the metal foil having a foil thickness as uniform as possible on the outer peripheral surface of the electrodeposition drum. Manufacturing method.

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