JP2015117409A - Electrodeposition drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrodeposition drum capable of maintaining the adhesiveness with a seal ring for a long period by inhibiting abrasion of both ends of a titanium plate in a width direction in polishing using an elastic grindstone, capable of stably generating a metal foil having a uniform smooth surface without causing decrease of a metal foil-producible area and with excellent productivity.SOLUTION: There is provided an electrodeposition drum used in a metal foil production device in which a titanium plate 2 is provided on the outer peripheral surface of an inner drum 1. Hard parts 3 harder than a central part in a width direction are provided, respectively in the range of 2 to 5 mm inward from both ends of the outer peripheral surface of the titanium plate 2 in the width direction, or both ends in the width direction of an effective area being the outer peripheral surface in which the metal foil is produced. The surface hardness of the hard part 3 is made to be 130 HBW or higher at the Brinell hardness.

Description

  The present invention relates to an electrodeposition drum in a metal foil manufacturing apparatus for manufacturing copper foil or the like.

  Conventionally, improvements have been made to produce a copper foil having a uniform smooth surface on the surface of the electrodeposition drum with the same thickness, but nowadays, a titanium plate (outer skin) with excellent corrosion resistance to the electrolyte is used. An electrodeposition drum is often used that adheres to the outer peripheral surface of the inner drum and generates a copper foil having a uniform smooth surface on the outer peripheral surface of the titanium plate with the same thickness (see Patent Document 1, etc.).

  By the way, the outer peripheral surface of the titanium plate of this electrodeposition drum needs to be insulated at both ends in the width direction in order to limit the electrodeposition range in the width direction. As shown in FIG. 1, there is known a seal ring method in which a seal ring 26 made of an insulator is fixed to both end surfaces 22 ′ of the titanium plate 22 by a ring holding member 24, as shown in FIG. It has been.

  The seal ring 26 is in close contact with the width direction end faces 22 ′ of the titanium plate 22 and the width direction end face 24 ′ of the ring holding member 24.

  In the figure, reference numeral 21 denotes an inner drum, and 23 denotes a titanium side plate attached to the side surface of the inner drum.

  Here, the seal tape method has a drawback that the region where the insulating tape on the outer peripheral surface of the titanium plate is attached becomes an ineffective region where no copper foil is generated.

  Therefore, at present, it is common to use a seal ring system that does not have the above-mentioned drawbacks, but the seal ring system has the following problems.

  For example, as illustrated in FIG. 2, when the polishing with an elastic grindstone 25 (for example, PVA grindstone) for smoothing the outer peripheral surface of the titanium plate 22 is repeatedly performed, a part of the elastic grindstone 25 becomes part of the titanium plate 22. When trying to wrap around the both end faces 22 'in the width direction, both ends are polished and the edge E of the titanium plate 22 is rounded, which may deteriorate the adhesion with the seal ring 26 (FIG. 2 ( b)).

  When the adhesion between the edge E of the both ends of the titanium plate 22 and the seal singing 26 deteriorates, the thickness of the both ends of the copper foil becomes thick due to abnormal electrodeposition, etc. It may not be performed well, leading to reduced productivity and yield.

  For example, it is possible to recover the edge portion E at both ends by cutting a rounded portion or the like of the titanium plate 22, but in this case, the thickness and width of the titanium plate 22 are reduced, This will lead to a decrease in the usable period of the electrodeposition drum and the area where the copper foil can be produced, which is not preferable.

Japanese Patent No. 4252680

  The present invention has been made in view of the current situation as described above, and maintains the adhesiveness with the seal ring for a long period of time by suppressing wear at both ends in the width direction of the titanium plate during polishing with an elastic grindstone. It is possible to provide an electrodeposition drum that is excellent in productivity and capable of producing a metal foil having a uniform and smooth surface stably without reducing the area in which the metal foil can be produced over a long period of time.

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

  An electrodeposition drum used in a metal foil manufacturing apparatus in which a titanium plate 2 is provided on the outer peripheral surface of an inner drum 1, and is made of metal on both ends in the width direction of the outer peripheral surface of the titanium plate 2 or the outer peripheral surface of the titanium plate 2. A hard part 3 that is harder than the central part in the width direction is provided in the range of 2 mm to 5 mm inward from both ends in the width direction of the effective area where the foil is generated. The surface hardness of the hard part 3 is Brinell The electrodeposition drum is characterized by having a hardness of 130 HBW or more.

  2. The electrodeposition drum according to claim 1, wherein the surface hardness of the hard portion 3 is 5-40 HBW in terms of Brinell hardness from the center in the width direction of the titanium plate 2. It is.

  The electrodeposition drum according to any one of claims 1 and 2, wherein the hard portion 3 is formed by subjecting the titanium plate 2 to work hardening. It relates to the drum.

  Further, in the electrodeposition drum according to claim 1, the hard portion 3 is formed by welding a hard member harder than the titanium plate 2 to the titanium plate 2. The present invention relates to an electrodeposition drum characterized by that.

  The electrodeposition drum according to any one of claims 1 and 2, wherein the hard portion 3 is formed by spraying a hard member harder than the titanium plate 2 onto the titanium plate 2. The present invention relates to an electrodeposition drum characterized by that.

  The electrodeposition drum according to claim 1, wherein the hard portion 3 is formed by ion-plating a hard member harder than the titanium plate 2 on the titanium plate 2. It is related with the electrodeposition drum characterized by being.

  The electrodeposition drum according to any one of claims 1 to 6, wherein the surface of the hard portion 3 is also an effective region in which a metal foil is generated.

  The electrodeposition drum according to any one of claims 1 to 7, wherein the metal foil is a copper foil.

  Since the present invention is configured as described above, it is possible to maintain the adhesion with the seal ring for a long period of time by suppressing wear at both ends in the width direction of the titanium plate during polishing with an elastic grindstone. Thus, an electrodeposition drum excellent in productivity capable of producing a metal foil having a uniform and smooth surface without decreasing the metal foil production area is provided.

It is a schematic explanatory sectional view of a seal ring system. It is a schematic explanatory drawing of the grinding | polishing process by an elastic grindstone. It is a schematic explanatory perspective view of a present Example. It is a schematic explanatory drawing of the work hardening process of a present Example. It is a schematic explanatory drawing of a welding joining process. It is a schematic explanatory drawing of the overlay welding process. It is a table | surface which shows an experimental condition and an experimental result. It is a table | surface which shows an experimental condition and an experimental result.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  When the titanium plate 2 is polished with an elastic grindstone, even if the elastic grindstone wraps around both ends of the titanium plate 2 in the width direction, both ends in the width direction of the titanium plate 2 are hard, so that wear of the edge portion of the titanium plate 2 is suppressed. Therefore, the edge portions at both ends in the width direction of the titanium plate 2 are not easily rounded, and the adhesion between the edge portion and the seal ring can be maintained over a long period of time, and a good metal foil can be manufactured over a long period of time. It becomes. In addition, since the edge portion is difficult to be rounded, the frequency of cutting performed when rounding occurs can be reduced. Therefore, the maintenance is easy and the life of the titanium plate 2 can be prolonged.

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

  The electrodeposition drum of the present embodiment has a titanium plate 2 stretched on the outer peripheral surface of the inner drum 1, and causes a copper foil to be electrodeposited on the outer peripheral surface of the titanium plate 2 by rotating in the electrolytic cell. It is.

  Specifically, in the range of 2 mm to 5 mm respectively inward from the width direction both ends of the outer peripheral surface of the titanium plate 2 or the width direction both ends of the effective region where the copper foil is generated on the outer peripheral surface of the titanium plate 2. Are provided with a hard portion 3 that is harder than the central portion in the width direction, and the surface hardness of the hard portion 3 is 130 HBW or more in terms of Brinell hardness.

The Brinell hardness is a hardness value calculated by pushing an indenter (metal sphere) into the surface of a sample with a predetermined test load and measuring the surface area of the indentation remaining on the surface. The test method is defined in JIS Z 2243 and ISO 6506, and the value obtained by dividing the test load P (kgf) by the calculated surface area S (mm ² ) is the Brinell hardness.

  As shown in FIG. 3, a titanium side plate 4 is provided on the side surface of the inner drum 1. Reference numeral 5 in the figure denotes a rotating shaft.

  In addition, although the present Example demonstrates the example which produces | generates copper foil on the outer peripheral surface of the titanium plate 2, it is good also as a structure which produces | generates other metal foils, such as nickel, iron, silver, for example.

  The surface hardness of the hard part 3 of the present embodiment is set to be 5 to 40 HBW harder in Brinell hardness than the center part in the width direction of the titanium plate 2 (part other than the hard part). Moreover, the center part of the width direction of the titanium plate 2 is set to 90HBW or more, preferably 110HBW or more in Brinell hardness.

  In this embodiment, TP270 material is used as the titanium plate 2. In addition, you may employ | adopt not only a pure titanium material but a titanium alloy material.

  In the present embodiment, the hard portion 3 is formed by cold-working and hardening the end portion from the end surface side in the width direction of the titanium plate 2 with an appropriate processing tool 6 (FIG. 4A). (See (b)). The processing tool 6 is moved along the end face while rotating, and the entire circumference is processed substantially uniformly by a series of operations.

  In the present embodiment, the work hardening treatment is performed in a state where the titanium plate 2 is stretched around the outer peripheral surface of the inner drum 1 to form a ring shape, but the titanium plate 2 is stretched around the outer peripheral surface of the inner drum 1. Work hardening may be performed at the sheet-like stage before installation.

  Further, after performing the work hardening process, unnecessary portions (unevenness and the like) generated by the process are removed, and a flattening (smoothing) process such as cutting is performed (see FIG. 4C). Therefore, the outer peripheral surface of the titanium plate 2 is a smooth surface, and the hard portion 3 is also an effective region where a copper foil is generated.

  The hard part 3 is not limited to the work hardening process, but the hard part 3 is welded, sprayed, or ion-plated with a hard member 7 (for example, TP340 material) harder than the titanium plate 2 at both ends in the width direction of the titanium plate 2. It may be formed.

  FIG. 5 shows an example in which the hard part is provided by welding and FIG. 6 shows an example in which the hard part is provided by overlay welding. Also in this case, a flattening process is performed after the welding and spraying processes as shown in FIGS. 5A and 6A (see FIGS. 5B and 6B). According to the welding, hard portions 3 made of a hard member are provided at both ends of the titanium plate 2, and according to thermal spraying and ion plating, a hard film made of a hard member is formed on the surfaces of both ends of the titanium plate 2. The hard part 3 will be provided.

  Note that, similarly to the work hardening process described above, welding, thermal spraying, or ion plating is applied to the titanium plate 2 in either a sheet shape before being stretched on the outer peripheral surface of the inner drum 1 or a ring shape after being stretched. You can do it. When welding is performed on the sheet-like titanium plate 2, the sheet-like hard member 7 is similarly used, and when welding is performed on the ring-shaped titanium plate 2, the ring-like hard member is similarly used. 7 is used.

  In the present embodiment, the hard portion 3 is provided in the range of 2 mm or more and 5 mm or less from both ends in the width direction of the outer peripheral surface of the titanium plate 2. If it is less than 2 mm, the effect of the hard part 3 is insufficient, and if it exceeds 5 mm, a region having different properties from the central part in the width direction becomes too wide, so it is necessary to consider the trim loss of the copper foil.

  In addition, when providing the invalid area | region where copper foil is not produced | generated in the very slight range of the width direction both ends of the outer peripheral surface of the titanium plate 2, specifically, the range of about 1-2 mm, copper foil produces | generates on an outer peripheral surface. The hard portion 3 is provided in the predetermined range from both ends of the effective area in the width direction. Also in this case, since the invalid area is usually very small, the numerical value range is set as in the case where the invalid area is provided in a predetermined range from both ends in the width direction of the outer peripheral surface of the titanium plate 2. The invalid area may also be the hard part 3.

  Since the present embodiment is configured as described above, when the titanium plate 2 is polished with the elastic grindstone 4, both ends in the width direction of the titanium plate 2 are hard even if the elastic grindstone 4 wraps around both end surfaces in the width direction of the titanium plate 2. Therefore, the wear of the edge portion is suppressed, and therefore, the edge portions at both ends in the width direction of the titanium plate 2 are difficult to curl, and when producing a metal foil using a seal ring system as illustrated in FIG. The adhesion between the edge portion and the seal ring can be maintained over a long period of time, and a good metal foil can be produced over a long period of time. In addition, since the edge portion is difficult to be rounded, the frequency of cutting performed when rounding occurs can be reduced. Therefore, the maintenance is easy and the life of the titanium plate 2 can be prolonged.

  Therefore, in this example, by suppressing wear at both ends in the width direction of the titanium plate during polishing with the elastic grindstone, the adhesion with the seal ring can be maintained for a long time, and the metal foil can be manufactured for a long time. It becomes an electrodeposition drum excellent in productivity capable of producing a metal foil having a uniform and smooth surface without reducing the possible area.

  Hereinafter, experimental examples that support the effects of the present embodiment will be described.

  Next 1. ~ 7. Samples were prepared according to the procedure described above, and the polishing resistance for each condition was compared. 7 and 8 show experimental conditions and experimental results.

1. Titanium hot-rolled sheets (thickness 8 mm x width 300 mm x length 300 mm) with a base material hardness of Brinell, 108, 110, 120, and 135 HBW are finished flat by machining the end faces in each width direction. .

2. The end face in the width direction of the titanium hot-rolled sheet is subjected to a work hardening treatment so as to reach a range of 5 mm or more from the end face.

3. Each front and back surface (inner and outer peripheral surfaces) of each titanium hot-rolled sheet and both end faces in the width direction are flattened by machining, and processed titanium hot-rolled sheet (thickness 6 mm x (width 300 mm-α [mm]) ×
A length of 300 mm). The hard part should be within the range of 5mm from both end faces. Further, -α is a width dimension reduced by machining.

  4). Make sure that the edges of each surface (outer peripheral surface) and end face are standing.

5. Using a PVA grinding wheel with an outer diameter of 305 mm and a width of 30 mm and PVA oil, the wheel rotation speed is 1
To each of the above-mentioned processed titanium hot-rolled plates, 500 rpm, grinding wheel pressing force 15 N, lengthwise feed rate 300 mm / min, widthwise feed rate 15 mm / min, and the amount of grinding over the edge of the grinding wheel are about 15 mm. PVA polishing is performed for 100 passes in order of # 180, # 320, and # 600.

6). After the PVA polishing, the situation of the edge portions at both ends in the width direction and the presence or absence of a surface step are evaluated. The evaluation is performed visually by a skilled inspector.

7). The same polishing and evaluation are performed on the processed titanium hot-rolled sheet that has been processed so that the hard part is within the range of 3, 2, 1 mm from the end face.

  From this experimental result, the width and width of the titanium plate at the time of polishing with an elastic grindstone are determined depending on the position and range of the hard part specified in the present invention, the Brinell hardness of the hard part and the Brinell hardness of the hard part and the central part. It can be confirmed that the wear at both ends in the direction can be satisfactorily suppressed.

1 Inner drum 2 Titanium plate 3 Hard part

  The present invention relates to an electrodeposition drum in a metal foil manufacturing apparatus for manufacturing copper foil or the like.

  Conventionally, improvements have been made to produce a copper foil having a uniform smooth surface on the surface of the electrodeposition drum with the same thickness, but nowadays, a titanium plate (outer skin) with excellent corrosion resistance to the electrolyte is used. An electrodeposition drum is often used that adheres to the outer peripheral surface of the inner drum and generates a copper foil having a uniform smooth surface on the outer peripheral surface of the titanium plate with the same thickness (see Patent Document 1, etc.).

  By the way, the outer peripheral surface of the titanium plate of this electrodeposition drum needs to be insulated at both ends in the width direction in order to limit the electrodeposition range in the width direction. As shown in FIG. 1, there is known a seal ring method in which a seal ring 26 made of an insulator is fixed to both end surfaces 22 ′ of the titanium plate 22 by a ring holding member 24, as shown in FIG. It has been.

  The seal ring 26 is in close contact with the width direction end faces 22 ′ of the titanium plate 22 and the width direction end face 24 ′ of the ring holding member 24.

  In the figure, reference numeral 21 denotes an inner drum, and 23 denotes a titanium side plate attached to the side surface of the inner drum.

  Here, the seal tape method has a drawback that the region where the insulating tape on the outer peripheral surface of the titanium plate is attached becomes an ineffective region where no copper foil is generated.

  Therefore, at present, it is common to use a seal ring system that does not have the above-mentioned drawbacks, but the seal ring system has the following problems.

  For example, as illustrated in FIG. 2, when the polishing with an elastic grindstone 25 (for example, PVA grindstone) for smoothing the outer peripheral surface of the titanium plate 22 is repeatedly performed, a part of the elastic grindstone 25 becomes part of the titanium plate 22. When trying to wrap around the both end faces 22 'in the width direction, both ends are polished and the edge E of the titanium plate 22 is rounded, which may deteriorate the adhesion with the seal ring 26 (FIG. 2 ( b)).

  When the adhesion between the edge E of the both ends of the titanium plate 22 and the seal singing 26 deteriorates, the thickness of the both ends of the copper foil becomes thick due to abnormal electrodeposition, etc. It may not be performed well, leading to reduced productivity and yield.

  For example, it is possible to recover the edge portion E at both ends by cutting a rounded portion or the like of the titanium plate 22, but in this case, the thickness and width of the titanium plate 22 are reduced, This will lead to a decrease in the usable period of the electrodeposition drum and the area where the copper foil can be produced, which is not preferable.

Japanese Patent No. 4252680

  The present invention has been made in view of the current situation as described above, and maintains the adhesiveness with the seal ring for a long period of time by suppressing wear at both ends in the width direction of the titanium plate during polishing with an elastic grindstone. It is possible to provide an electrodeposition drum that is excellent in productivity and capable of producing a metal foil having a uniform and smooth surface stably without reducing the area in which the metal foil can be produced over a long period of time.

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

An electrodeposition drum used in a metal foil manufacturing apparatus in which a titanium plate 2 is provided on the outer peripheral surface of an inner drum 1, and is made of metal on both ends in the width direction of the outer peripheral surface of the titanium plate 2 or the outer peripheral surface of the titanium plate 2. The hard part is harder than the central part in the width direction in the range starting from both ends in the width direction of the effective area where the foil is generated and starting from the end in a position of 2 mm at the maximum and 5 mm at the end. 3 is provided, and the surface hardness of the hard part 3 is Brinell hardness of 130 HBW or more.

  2. The electrodeposition drum according to claim 1, wherein the surface hardness of the hard portion 3 is 5-40 HBW in terms of Brinell hardness from the center in the width direction of the titanium plate 2. It is.

  The electrodeposition drum according to any one of claims 1 and 2, wherein the hard portion 3 is formed by subjecting the titanium plate 2 to work hardening. It relates to the drum.

  Further, in the electrodeposition drum according to claim 1, the hard portion 3 is formed by welding a hard member harder than the titanium plate 2 to the titanium plate 2. The present invention relates to an electrodeposition drum characterized by that.

  The electrodeposition drum according to any one of claims 1 and 2, wherein the hard portion 3 is formed by spraying a hard member harder than the titanium plate 2 onto the titanium plate 2. The present invention relates to an electrodeposition drum characterized by that.

  The electrodeposition drum according to claim 1, wherein the hard portion 3 is formed by ion-plating a hard member harder than the titanium plate 2 on the titanium plate 2. It is related with the electrodeposition drum characterized by being.

  The electrodeposition drum according to any one of claims 1 to 6, wherein the surface of the hard portion 3 is also an effective region in which a metal foil is generated.

  The electrodeposition drum according to any one of claims 1 to 7, wherein the metal foil is a copper foil.

  Since the present invention is configured as described above, it is possible to maintain the adhesion with the seal ring for a long period of time by suppressing wear at both ends in the width direction of the titanium plate during polishing with an elastic grindstone. Thus, an electrodeposition drum excellent in productivity capable of producing a metal foil having a uniform and smooth surface without decreasing the metal foil production area is provided.

It is a schematic explanatory sectional view of a seal ring system. It is a schematic explanatory drawing of the grinding | polishing process by an elastic grindstone. It is a schematic explanatory perspective view of a present Example. It is a schematic explanatory drawing of the work hardening process of a present Example. It is a schematic explanatory drawing of a welding joining process. It is a schematic explanatory drawing of the overlay welding process. It is a table | surface which shows an experimental condition and an experimental result. It is a table | surface which shows an experimental condition and an experimental result.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  When the titanium plate 2 is polished with an elastic grindstone, even if the elastic grindstone wraps around both ends of the titanium plate 2 in the width direction, both ends in the width direction of the titanium plate 2 are hard, so that wear of the edge portion of the titanium plate 2 is suppressed. Therefore, the edge portions at both ends in the width direction of the titanium plate 2 are not easily rounded, and the adhesion between the edge portion and the seal ring can be maintained over a long period of time, and a good metal foil can be manufactured over a long period of time. It becomes. In addition, since the edge portion is difficult to be rounded, the frequency of cutting performed when rounding occurs can be reduced. Therefore, the maintenance is easy and the life of the titanium plate 2 can be prolonged.

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

  The electrodeposition drum of the present embodiment has a titanium plate 2 stretched on the outer peripheral surface of the inner drum 1, and causes a copper foil to be electrodeposited on the outer peripheral surface of the titanium plate 2 by rotating in the electrolytic cell. It is.

Specifically, the width direction both ends of the outer peripheral surface of the titanium plate 2 or the width direction both ends of the effective region where the copper foil is generated on the outer peripheral surface of the titanium plate 2 are used as starting points. In the range where the end point is a position of minimum 2 mm and maximum 5 mm, a hard portion 3 is provided which is harder than the central portion in the width direction, and the surface hardness of the hard portion 3 is 130 HBW or more in terms of Brinell hardness. Is.

The Brinell hardness is a hardness value calculated by pushing an indenter (metal sphere) into the surface of a sample with a predetermined test load and measuring the surface area of the indentation remaining on the surface. The test method is defined in JIS Z 2243 and ISO 6506, and the value obtained by dividing the test load P (kgf) by the calculated surface area S (mm ² ) is the Brinell hardness.

  As shown in FIG. 3, a titanium side plate 4 is provided on the side surface of the inner drum 1. Reference numeral 5 in the figure denotes a rotating shaft.

  In addition, although the present Example demonstrates the example which produces | generates copper foil on the outer peripheral surface of the titanium plate 2, it is good also as a structure which produces | generates other metal foils, such as nickel, iron, silver, for example.

  The surface hardness of the hard part 3 of the present embodiment is set to be 5 to 40 HBW harder in Brinell hardness than the center part in the width direction of the titanium plate 2 (part other than the hard part). Moreover, the center part of the width direction of the titanium plate 2 is set to 90HBW or more, preferably 110HBW or more in Brinell hardness.

  In this embodiment, TP270 material is used as the titanium plate 2. In addition, you may employ | adopt not only a pure titanium material but a titanium alloy material.

  In the present embodiment, the hard portion 3 is formed by cold-working and hardening the end portion from the end surface side in the width direction of the titanium plate 2 with an appropriate processing tool 6 (FIG. 4A). (See (b)). The processing tool 6 is moved along the end face while rotating, and the entire circumference is processed substantially uniformly by a series of operations.

  In the present embodiment, the work hardening treatment is performed in a state where the titanium plate 2 is stretched around the outer peripheral surface of the inner drum 1 to form a ring shape, but the titanium plate 2 is stretched around the outer peripheral surface of the inner drum 1. Work hardening may be performed at the sheet-like stage before installation.

  Further, after performing the work hardening process, unnecessary portions (unevenness and the like) generated by the process are removed, and a flattening (smoothing) process such as cutting is performed (see FIG. 4C). Therefore, the outer peripheral surface of the titanium plate 2 is a smooth surface, and the hard portion 3 is also an effective region where a copper foil is generated.

  The hard part 3 is not limited to the work hardening process, but the hard part 3 is welded, sprayed, or ion-plated with a hard member 7 (for example, TP340 material) harder than the titanium plate 2 at both ends in the width direction of the titanium plate 2. It may be formed.

  FIG. 5 shows an example in which the hard part is provided by welding and FIG. 6 shows an example in which the hard part is provided by overlay welding. Also in this case, a flattening process is performed after the welding and spraying processes as shown in FIGS. 5A and 6A (see FIGS. 5B and 6B). According to the welding, hard portions 3 made of a hard member are provided at both ends of the titanium plate 2, and according to thermal spraying and ion plating, a hard film made of a hard member is formed on the surfaces of both ends of the titanium plate 2. The hard part 3 will be provided.

  Note that, similarly to the work hardening process described above, welding, thermal spraying, or ion plating is applied to the titanium plate 2 in either a sheet shape before being stretched on the outer peripheral surface of the inner drum 1 or a ring shape after being stretched. You can do it. When welding is performed on the sheet-like titanium plate 2, the sheet-like hard member 7 is similarly used, and when welding is performed on the ring-shaped titanium plate 2, the ring-like hard member is similarly used. 7 is used.

Further, in the present embodiment, the hard portion 3 is provided in a range starting from both ends in the width direction of the outer peripheral surface of the titanium plate 2 and starting from the both ends inward and having a minimum of 2 mm and a maximum of 5 mm . If it is less than 2 mm, the effect of the hard part 3 is insufficient, and if it exceeds 5 mm, a region having different properties from the central part in the width direction becomes too wide, so it is necessary to consider the trim loss of the copper foil.

  In addition, when providing the invalid area | region where copper foil is not produced | generated in the very slight range of the width direction both ends of the outer peripheral surface of the titanium plate 2, specifically, the range of about 1-2 mm, copper foil produces | generates on an outer peripheral surface. The hard portion 3 is provided in the predetermined range from both ends of the effective area in the width direction. Also in this case, since the invalid area is usually very small, the numerical value range is set as in the case where the invalid area is provided in a predetermined range from both ends in the width direction of the outer peripheral surface of the titanium plate 2. The invalid area may also be the hard part 3.

  Since the present embodiment is configured as described above, when the titanium plate 2 is polished with the elastic grindstone 4, both ends in the width direction of the titanium plate 2 are hard even if the elastic grindstone 4 wraps around both end surfaces in the width direction of the titanium plate 2. Therefore, the wear of the edge portion is suppressed, and therefore, the edge portions at both ends in the width direction of the titanium plate 2 are difficult to curl, and when producing a metal foil using a seal ring system as illustrated in FIG. The adhesion between the edge portion and the seal ring can be maintained over a long period of time, and a good metal foil can be produced over a long period of time. In addition, since the edge portion is difficult to be rounded, the frequency of cutting performed when rounding occurs can be reduced. Therefore, the maintenance is easy and the life of the titanium plate 2 can be prolonged.

  Therefore, in this example, by suppressing wear at both ends in the width direction of the titanium plate during polishing with the elastic grindstone, the adhesion with the seal ring can be maintained for a long time, and the metal foil can be manufactured for a long time. It becomes an electrodeposition drum excellent in productivity capable of producing a metal foil having a uniform and smooth surface without reducing the possible area.

  Hereinafter, experimental examples that support the effects of the present embodiment will be described.

  Next 1. ~ 7. Samples were prepared according to the procedure described above, and the polishing resistance for each condition was compared. 7 and 8 show experimental conditions and experimental results.

1. Titanium hot-rolled sheets (thickness 8 mm x width 300 mm x length 300 mm) with a base material hardness of Brinell, 108, 110, 120, and 135 HBW are finished flat by machining the end faces in each width direction. .

2. The end face in the width direction of the titanium hot-rolled sheet is subjected to a work hardening treatment so as to reach a range of 5 mm or more from the end face.

3. Each front and back surface (inner and outer peripheral surfaces) of each titanium hot-rolled sheet and both end faces in the width direction are flattened by machining, and processed titanium hot-rolled sheet (thickness 6 mm x (width 300 mm-α [mm]) ×
A length of 300 mm). The hard part should be within the range of 5mm from both end faces. Further, -α is a width dimension reduced by machining.

  4). Make sure that the edges of each surface (outer peripheral surface) and end face are standing.

5. Using a PVA grinding wheel with an outer diameter of 305 mm and a width of 30 mm and PVA oil, the wheel rotation speed is 1
To each of the above-mentioned processed titanium hot-rolled plates, 500 rpm, grinding wheel pressing force 15 N, lengthwise feed rate 300 mm / min, widthwise feed rate 15 mm / min, and the amount of grinding over the edge of the grinding wheel are about 15 mm. PVA polishing is performed for 100 passes in order of # 180, # 320, and # 600.

6). After the PVA polishing, the situation of the edge portions at both ends in the width direction and the presence or absence of a surface step are evaluated. The evaluation is performed visually by a skilled inspector.

7). The same polishing and evaluation are performed on the processed titanium hot-rolled sheet that has been processed so that the hard part is within the range of 3, 2, 1 mm from the end face.

  From this experimental result, the width and width of the titanium plate at the time of polishing with an elastic grindstone are determined depending on the position and range of the hard part specified in the present invention, the Brinell hardness of the hard part and the Brinell hardness of the hard part and the central part. It can be confirmed that the wear at both ends in the direction can be satisfactorily suppressed.

1 Inner drum 2 Titanium plate 3 Hard part

Claims (8)

  An electrodeposition drum used in a metal foil manufacturing apparatus in which a titanium plate is provided on an outer peripheral surface of an inner drum, wherein the metal foil is generated on both ends in the width direction of the outer peripheral surface of the titanium plate or on the outer peripheral surface of the titanium plate. In the range from 2 mm to 5 mm inward from both ends in the width direction of the effective area, a hard portion that is harder than the central portion in the width direction is provided, and the surface hardness of this hard portion is 130 HBW or more in Brinell hardness Electrodeposition drum characterized by being.   2. The electrodeposition drum according to claim 1, wherein the surface hardness of the hard part is 5 to 40 HBW harder in Brinell hardness than the center part in the width direction of the titanium plate.   The electrodeposition drum according to claim 1, wherein the hard portion is formed by performing a work hardening process on the titanium plate.   The electrodeposition drum according to claim 1, wherein the hard portion is formed by welding a hard member harder than the titanium plate to the titanium plate. Electrodeposition drum.   The electrodeposition drum according to claim 1, wherein the hard portion is formed by spraying a hard member harder than the titanium plate on the titanium plate. Electrodeposition drum.   The electrodeposition drum according to claim 1, wherein the hard portion is formed by ion-plating a hard member harder than the titanium plate on the titanium plate. An electrodeposition drum.   The electrodeposition drum according to any one of claims 1 to 6, wherein the surface of the hard part is also an effective region in which a metal foil is generated.   The electrodeposition drum according to any one of claims 1 to 7, wherein the metal foil is a copper foil.

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