JP4290354B2 - Method for producing seamless endless member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a seamless endless member such as a metal matrix for electroforming and a photoreceptor substrate for an image forming apparatus. The present invention can be widely applied to technical fields related to electroforming.
[0002]
[Prior art]
As a conventional example of a method for producing an electrophotographic image-forming photoreceptor substrate, which is an example of a seamless endless member having a seam, by electroforming, plating is performed on the outer peripheral surface of a cylindrical portion of a cylindrical metal matrix ( After depositing a thin film having a thickness of 20 to 50 μm by plating, the end is peeled and cut, and the whole is released by blowing compressed air or the like onto the thin film that is in close contact. In this method, an electrical insulating portion for facilitating peeling is provided to serve as an end portion (deposited film peeling start portion) of the deposition member, and the peeling of the deposited film is started from here.
[0003]
Since the deposition film peeling start part is usually formed with an electrically insulating silicone rubber adhesive or the like with a thickness of about 0.2 mm, if the deposition current is excessively concentrated on the peeling start part, the deposited film thickness is formed. As a result, the dendrite (dendritic protrusion) is formed, the insulating material forming the peeling start portion is damaged and retreated, and the durability is lost. For this reason, it is necessary to suppress the deposition current to both ends of the cylindrical metal matrix, prevent the damage of the peeling start portion over time, stabilize the peeling operation of the deposited film, and not reduce the productivity. is there.
[0004]
The seamless endless flexible endless member for the image forming apparatus includes (A) a belt-shaped organic photoreceptor and a conveying belt as a belt-shaped member, and (B) a sleeve-shaped developing unit (developing as a roller-shaped member). There is a photosensitive drum (drum-shaped photosensitive member) as a cylindrical member.
[0005]
As a technique for manufacturing a seamless endless flexible member for an image forming apparatus, for example, the following are known.
(1) The invention disclosed in Japanese Patent Application Laid-Open No. 3-17290 (the title of the invention “Method for producing a seamless electroformed sleeve”, Patent No. 2881818) relates to a method for producing a toner conveying and developing sleeve of an image forming apparatus. This is related to the shape of the surface of the electroforming master for depositing and forming the sleeve part, roughening both ends of the sleeve part and preventing the film deposited during electroforming from peeling off and causing wrinkles. When the portion is roughened, there is a problem that peeling of both ends and release in the longitudinal direction cannot be easily performed when a method of blowing compressed air is used for peeling and releasing. Further, depending on the peeling or releasing method, a kink-like minute bend, surface contamination, scratches, etc. are likely to occur, and it cannot be used as a method for producing a photoreceptor substrate.
[0006]
The invention described in Japanese Patent Laid-Open No. 3-17289 (name of the invention “method for producing a seamless electroformed sleeve”) relates to a method for producing a toner conveying and developing sleeve for an image forming apparatus, and is deposited by electroforming. The sleeve surface with an outer diameter of 25 mm and a length of about 250 mm is subjected to honing treatment. At that time, the sleeve is peeled off from the electroforming master by striking the honing beads, but partial wrinkles occur due to the internal stress of the sleeve. There is a problem that it is easy to do. Further, if it is peeled off by this method, a kink-like microbending is likely to occur, so that it cannot be used as a method for manufacturing a photoreceptor substrate.
[0007]
The invention described in Japanese Patent Laid-Open No. 3-17291 (invention name “method for producing seamless electroformed sleeve and master for electroforming”) has a micro uneven surface on a portion corresponding to a sleeve portion where a micro uneven surface is to be formed. The formed electroforming master is immersed in an electroforming bath to which a stress reducing agent is added to precipitate a sleeve having a predetermined uneven surface, and the sleeve is extracted from the master using compressive stress. However, if a micro uneven surface is formed on a predetermined part on the sleeve, the electroforming liquid infiltrates from both ends of the electroforming master during the electroforming process to generate flaws, and the cleaning water is soiled or dried in the subsequent process. Since spots are sometimes generated, when used as a method for producing a photoreceptor substrate, there is a problem that coating film defects are likely to occur.
[0008]
The invention described in Japanese Patent Application Laid-Open No. 7-48691 (invention title “seamless flexible endless member and apparatus for manufacturing the endless member”) is formed in a cylindrical shape when forming a seamless endless member. This method uses a diaphragm cathode case and adjusts the liquid temperature to form a surface layer with a roughness of scattering reflection. However, it does not indicate the film thickness control or peeling method at both ends of the cylindrical metal matrix.
[0009]
In the invention related to Patent No. 2913104 (name of invention “electrophotographic photosensitive member”), a conductive support of the electrophotographic photosensitive member is formed of a nickel sulfamate solution having a temperature of 40 ° C. or more, and its hardness is designated as Hv 400 to 500. It is a thing. However, this invention does not indicate the film thickness control or peeling method at both ends of the cylindrical metal matrix.
[0010]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described problems of the prior art, and a first object thereof is a cylindrical shape provided with a deposition film peeling start portion for facilitating the peeling operation of the deposition film (plating film). The object is to provide an improved structure of a metal matrix.
The second object of the present invention is to perform electroforming under appropriate conditions using this metal matrix, thereby suppressing the plating film deposition current at both ends of the metal matrix, and An electroformed film with an appropriate thickness is formed on the surface to prevent damage at the start of peeling, facilitating the peeling work of the deposited film, and high-quality seamless endless flexible members with high productivity. It is to be manufactured with.
[0011]
[Means for Solving the Problems]
According to the first aspect of the present invention, a deposition film peeling start portion is formed on the outer peripheral surface of the cylindrical portion of the cylindrical metal base body, and an auxiliary electrode ring having an outer diameter smaller than the outer diameter of the cylindrical portion is provided at the lower end of the cylindrical portion. The outer peripheral surface of the cylindrical metal lower end portion of the cylindrical metal base body and the outer peripheral surface of the auxiliary electrode ring are set at an appropriate value in the diameter direction of the auxiliary electrode ring. A method for producing a seamless endless flexible member by electroforming using a cylindrical metal matrix for processing,
In the cylindrical portion of the cylindrical metal matrix main body, the outer peripheral surface of the upper end and the outer peripheral surface of the lower end are formed on the surface of the auxiliary electrode ring, and the outer peripheral surface of the upper end and the lower end of the auxiliary electrode ring are formed on surfaces without corners, respectively.
An electroforming liquid (plating liquid) having a nickel sulfamate concentration of 450 to 550 g / l and a sodium saccharin concentration of 20 to 100 ppm is placed in an electroforming tank, and the metal matrix is immersed in the electroforming liquid as a cathode. The upper end of the cylindrical part is 10 to 30 mm below the liquid level, and a cylindrical anode is immersed in the electroforming liquid to surround the metal matrix, and the distance between these two electrodes is 80 to 150 mm. A method for producing a seamless endless flexible member characterized by performing electroforming at a temperature of 45 to 55 ° C. and an electrodeposition current of 5 to 10 A / dm ² .
In the invention according to claim 2, the deposition film peeling start portion is formed on the outer peripheral surface of the cylindrical portion of the cylindrical metal base body, the width is 5 to 15 mm, and the outer diameter is 0.5 to 3 mm from the outer diameter of the cylindrical portion. A small auxiliary electrode ring is provided coaxially at the lower end portion of the cylindrical portion, and the outer peripheral surface of the lower end portion of the cylindrical portion of the cylindrical metal matrix main body and the outer peripheral surface of the auxiliary electrode ring in the diameter direction of the auxiliary electrode ring A seamless and flexible endless member is produced by electroforming using a cylindrical metal matrix for electroforming with an interval of 3 to 15 mm,
In the cylindrical portion of the cylindrical metal matrix main body, the outer peripheral surface of the upper end and the outer peripheral surface of the lower end are formed on the surface of the auxiliary electrode ring, and the outer peripheral surface of the upper end and the lower end of the auxiliary electrode ring are formed on surfaces without corners, respectively.
An electroforming liquid (plating liquid) having a nickel sulfamate concentration of 450 to 550 g / l and a sodium saccharin concentration of 20 to 100 ppm is placed in an electroforming tank, and the metal matrix is immersed in the electroforming liquid as a cathode. The upper end of the cylindrical part is 10 to 30 mm below the liquid level, and a cylindrical anode is immersed in the electroforming liquid to surround the metal matrix, and the distance between these two electrodes is 80 to 150 mm. A method for producing a seamless endless flexible member characterized by performing electroforming at a temperature of 45 to 55 ° C. and an electrodeposition current of 5 to 10 A / dm ² .
According to a third aspect of the present invention, the non-cornered surface is formed by pressing a silicone rubber having a thickness of 0.5 to 1.5 mm and a rubber hardness of 40 to 55 degrees with a resin insulating ring. 3. The method for producing a seamless endless flexible member according to claim 1, wherein a silicone rubber having a thickness of 0.5 to 1.5 mm is housed and fixed in the portion.
According to a fourth aspect of the present invention, the silicone rubber can be stored and fixed from the outer peripheral surface of the upper end and the lower end of the cylindrical outer peripheral surface of the cylindrical metal matrix, and from the outer peripheral surfaces of both ends of the auxiliary electrode ring. 4. The method for producing a seamless endless flexible member according to claim 3, wherein the method is performed by pressing with a resin insulating ring 5 to 2 mm larger.
The invention according to claim 5 is characterized in that the seamless endless flexible endless member is a photosensitive substrate for an image forming apparatus. It is a manufacturing method of a shaped member.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration example of an image forming apparatus (copier) using a Carlson process, which is configured by using seamless endless members such as belts and sleeves formed by electroforming (electroforming). It is explanatory drawing shown.
[0019]
This image forming apparatus includes a belt-shaped organic photoreceptor 1 having a seamless endless member as a base, a charging unit 2, an exposure unit 3, a sleeve-like developing unit 4 as a seamless endless member, a transfer unit, and a transfer unit. 5, a belt-like conveyance unit (conveying belt) 6 that is a seamless endless flexible member, and a sleeve-like fixing unit 7 that uses the seamless seamless endless member as a base. In FIG. 1, reference numeral 1a is a belt running roller, 7a is a fixing roller, and 7b is a pressure roller.
[0020]
The use of a belt-like organic photoconductor or a transport mechanism having a seamless endless flexible member as described above provides the flexibility of arrangement of the image forming system and the advantage that the apparatus can be made compact. There is. Further, in the sleeve-like fixing mechanism using the seamless endless member as a base, since the heat capacity can be reduced, advantages such as shortening the rise time and standby time can be obtained.
[0021]
FIG. 2 is a perspective view showing a unitary shape of a seamless endless flexible member formed by electroforming (electroforming), where (a) shows a belt and (b) shows a sleeve. A detent guide 9 is bonded to the belt-shaped organic photoreceptor 1 in FIG. 1 and the belt-shaped organic photoreceptor (or transport belt) 8 in FIG. In the sleeve-like seamless endless flexible member 10 used as the sleeve-like developing part 4 and the sleeve-like fixing part 7, flanges 11 are press-fitted or bonded to both ends.
[0022]
3A and 3B show the structure of a metal matrix for electrocasting according to the present invention. FIG. 3A is a perspective view showing the entire structure of the metal matrix, and FIG. 3B is a cylindrical portion of the metal matrix (metal matrix). (C) is an enlarged sectional view showing the shape of the lower part of this metal matrix, (d) is a perspective view of (c).
[0023]
When the seamless endless member having no seam by the metal matrix, that is, the cylindrical photoreceptor substrate (photoreceptor drum substrate) 12 for the image forming apparatus, the central portion in the longitudinal direction shown in FIG. After a thin film having a thickness of 20 to 50 μm is deposited on the outer peripheral surface of the cylindrical portion of the metal mold 30 whose upper and lower portions are conical by plating, the plated film is peeled off (released) from the metal mold 30. Usually, this plating film is made of nickel. Hereinafter, the cylindrical part which forms a plating film among the metal mother molds 30 is called a metal mother mold body.
[0024]
The upper end portion 13 and the lower end portion 14 of the metal matrix main body are provided with a pointed (upper) peeling start portion 15 and a pointed (lower) peeling start portion 16. In the electroforming using the metal mold 30, a plating film is deposited on the outer peripheral surface of the cylindrical portion, and portions corresponding to the upper end portion 13 and the lower end portion 14 of the plating film are cut and removed. Compressed air is blown onto the plating film remaining in the cylindrical portion of the substrate to peel (release) it, and this peeling plating film is manufactured as a photoreceptor substrate 12 for image formation, which is an example of a seamless endless member. To do.
[0025]
Of the plating film formed on the metal matrix 30, in the cutting and removal operation corresponding to the upper end portion 13 and the lower end portion 14, start from the peeling start portions 15 and 16 (pick these peeling start portions with your fingers. And the part that has been peeled off is cut along dotted lines 17 and 18 that are thickness appropriate portions. As a cutting method, a method in which a cutting jig is attached to a cylindrical portion of a metal matrix after electroforming on which a plating film is formed, or a method in which a marking line is preliminarily placed in the metal matrix.
[0026]
As a plating solution for electroforming, a nickel-containing solution having the following characteristics is employed. That is, electroplating is performed with a plating solution in which a gap is generated between the outer peripheral surface of the metal matrix and the inner peripheral surface of the plating film (deposition film) due to the generation of compressive stress in the plating film. When such plating is used, the cylindrical plating film whose upper and lower ends in FIG. 3 are cut and removed is compressed air is blown between this and the outer peripheral surface of the metal matrix, and the entire plating film is peeled off. Then, it falls down as it is under its own weight, and the peel-off plating film becomes the image forming photoconductor substrate 12.
[0027]
When electroforming with nickel sulfamate liquid, saccharin is added as a compressive stress generator, and the amount added is adjusted by the outer diameter size and surface property of the metal matrix body, the liquid temperature and the current density.
[0028]
Further, for example, in an image forming photoreceptor substrate having a deposited film thickness (plated film thickness) of about 30 μm, a metal matrix body having an outer diameter of 60 to 200 mm is used, and the compressive stress generator has a concentration of about 10 to 100 ppm. Is added. On the other hand, in the case of a fixing sleeve having an outer diameter of 30 to 60 mm for the metal matrix body, the thickness of the deposited film is as thick as about 50 μm. It is somewhat difficult to release the entire surface from the mother mold.
[0029]
Auxiliary electrode ring 20 for preventing the deposition current from concentrating on the lower end 19 of the mother die body constituting the metal mother die 30 and increasing the film thickness at the peeling start portion is provided on the mother die. The insulating ring 21 is disposed between the lower end 19 and the auxiliary electrode ring 20, and the distance between the insulating ring 21 and the auxiliary electrode ring 20 is set to 5 to 15 mm. If the width is adjusted within a range of 5 to 15 mm and plating is performed with an electrodeposition current of 5 to 10 A / dm ² , the deposition current concentrated on the reduced diameter lower end 19 of the metal matrix body is suppressed to an appropriate state. Be analyzed.
[0030]
The outer diameter of the auxiliary electrode ring 20 is made small so that the distance 22 between the outer peripheral surface of the auxiliary electrode ring 20 and the outer peripheral surface of the metal matrix body is 0.5 to 3 mm, and the outer diameter of the insulating ring 21 is reduced in diameter of the metal matrix body. It is larger than the outer diameter of the end of the portion 19. Further, the outer diameter of the insulating flange 23 is made larger than the outer diameter of the auxiliary electrode ring 20, and the gap 24 is arranged so as to be smaller than the outer diameter of the metal matrix body. By adopting such a structure, neither the auxiliary electrode ring 20 nor the insulating ring 21 becomes larger than the outer diameter of the metal matrix body due to thermal expansion in the electroforming liquid.
[0031]
3 (b) and 3 (c) show that the upper and lower ends of the metal matrix main body on which the deposited film is formed and the end of the auxiliary electrode ring 20 are easily formed on a non-cornered surface, and the electroforming liquid It shows a stable seal structure against temperature rise. In this seal structure, when assembling the metal matrix, the silicone rubber packing portion 25 having a thickness of 0.5 to 1.5 mm and a rubber hardness of 40 to 55 degrees is fixed with an insulating flange 26 with a pressing allowance of 0.2 to 0.5 mm. Then, a silicone rubber having a thickness of 0.5 to 1.5 mm is housed and fixed in the rubber housing portion 27 of the insulating flange 26.
[0032]
Next, in order to form the upper end portion (the outer peripheral surface of the upper end portion) 28 of the metal matrix on the surface without corners, the cutter knife 29 is used to remove the surplus portion on the outer peripheral surface side of the thin and low hardness silicone rubber. If used and cut along the outer peripheral surface of the metal mold main body, the insulating flange 26 having an outer diameter larger than the outer diameter of the end of the metal mold main body becomes a laying plate, and the end is easily molded and sealed to a non-cornered surface. can do.
[0033]
FIG. 3 (c) is similar to FIG. 3 (b), in which the lower end reduced diameter portion 19 and the end portion of the auxiliary electrode ring 20 on the outer peripheral surface of the metal matrix body are formed on a non-cornered surface. The metal mold for electroforming with good productivity can be constructed because there is no catching and the peelability is improved.
[0034]
FIG. 4 is a perspective view showing a manufacturing apparatus (electroforming apparatus) and a manufacturing method for a photoreceptor substrate for an image forming apparatus, which is a seamless endless member having a seam. A metal matrix shown in FIG. 3 formed on a non-exposed surface is used. First, the symbols shown in this figure will be explained. 40 is an electroforming tank, 41 is a cover plate, 42 is a motor for rotating the metal mold 30 around its axis, and 43 and 44 are filled with nickel balls. Anode bag, 45 and 46 are nozzles, 50 is a cylindrical diaphragm cathode case (titanium anode), 51 is a liquid level position of an electroforming liquid (plating liquid), 52 is an upper end position of the metal matrix body, and 53 is electroformed This is a liquid supply pipe.
[0035]
At the time of electroforming, the upper end position 52 of the metal mold main body is immersed and placed at a depth of 10 to 30 mm from the liquid surface position 51 so that the distance between the titanium anode 50 and the metal mold 30 is 80 to 150 mm. . Then, 20-30 liters of electroforming liquid (nickel sulfamate concentration: 450-550 g / l, temperature: 45-55 ° C.) is supplied from the supply pipe 53, and plating is performed under conditions of an electrodeposition current of 5-10 A / dm ^2. If the deposited film thickness is 30 to 50 μm, a deposited film thickness that hardly undergoes regression degradation is formed at the peeling start portion, peeling and releasing are easily performed, and a decrease in productivity is minimized. It is possible to produce a photoreceptor substrate for an image forming apparatus that is a seamless endless flexible member.
[0036]
【The invention's effect】
As is apparent from the above description, according to the present invention, the following effects can be obtained.
According to the first and fifth aspects of the present invention, since the film thickness of the plating formed on the deposition film peeling start portion at both ends of the cylindrical metal mold for electroforming is appropriately maintained, the deposition film peeling start portion is formed. Deterioration degradation of the insulating material to be suppressed is suppressed, the separation work and release of the deposited film peeling start portion can be performed stably, and the upper end portion and the lower end portion of the cylindrical metal base body and the corner portions of the auxiliary electrode ring In this case, the current tends to concentrate due to the edge effect, and in order to easily peel the deposited film, it is necessary not to be caught at the corner. If a deposited film is formed on the surface, the film can be easily peeled without being caught, and a seamless endless member such as a photoreceptor substrate for image formation can be manufactured with minimal reduction in productivity. Can do. According to the inventions of claims 2 and 5, the lower end portion of the cylindrical metal base body is likely to concentrate the deposition current due to the wraparound, and is formed at the deposition film peeling start portion unless the current is dispersed using the auxiliary electrode ring. Since the film thickness to be increased increases and the degradation of the deposited film peeling start part insulating material becomes severe, the interval between the lower end of the cylindrical metal matrix and the auxiliary electrode ring is 3 to 15 mm apart, and the ring width is 5 to 5 mm. If the outer diameter of the cylindrical metal mold is set to be 0.5 to 3 mm smaller than the outer diameter of the cylindrical metal mold and arranged coaxially, the film thickness formed at the peeling start portion is appropriately maintained. Deterioration degradation is suppressed, peeling of the edge and pulling downward of the deposited film are facilitated, generation of minute kink-like bending is eliminated, mold release is stable, and a cylindrical metal matrix Upper and lower ends of main body and auxiliary electrode phosphorus The corner liable current concentrates due to the edge effect, it is necessary to not to catch on the corner portion in order to peel the deposited film easily. If a deposited film is formed on the surface, the film can be easily peeled without being caught, and a seamless endless member such as a photoreceptor substrate for image formation can be manufactured with minimal reduction in productivity. Can do.
According to the third and fifth aspects of the invention, in order to form the upper end portion and the lower end portion of the cylindrical metal base body and the auxiliary electrode ring on a non-cornered surface, the thin and low thickness that can be easily formed with a cutter such as a cutter knife. Hard silicon rubber is pressed to seal the corners, forming a space to store the thickness of the silicon rubber part inside the corners, fixing the temperature rise in the electroforming liquid, etc. A surface can be secured, a deposited film can be formed on the surface, and can be easily peeled off without being caught, and a seamless endless member such as a photoreceptor substrate for image formation can be produced with minimal reduction in productivity. Can be manufactured.
According to the fourth and fifth aspects of the present invention, when the upper end portion and the lower end portion of the cylindrical metal base body and the auxiliary electrode ring are formed on a non-cornered surface, the silicon rubber is pressed and held by the resin insulating ring. When the outer diameter of the insulating ring is made larger in the range of 0.5 to 2 mm than the outer diameter of the upper and lower ends of the cylindrical metal matrix main body and the auxiliary electrode ring, the silicon rubber is pressed to become an excessive portion. When cutting the outer periphery with a cutter knife, it is easy to cut the cutting edge into the resin, the entire periphery can be easily molded, a surface without corners can be secured, and a deposited film can be formed on the surface It can be easily peeled without being caught, and a seamless endless flexible member such as an image-forming photoreceptor substrate can be produced with minimal reduction in productivity.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a configuration example of an image forming apparatus (copier) by a Carlson process configured using a seamless endless member such as a belt and a sleeve formed by electroforming. .
FIGS. 2A and 2B are perspective views showing a shape of a seamless endless flexible member formed by electroforming, where FIG. 2A shows a belt and FIG. 2B shows a sleeve.
3A and 3B show the appearance of a metal mold for electroforming according to the present invention, in which FIG. 3A is a perspective view showing the overall structure of the metal mold, and FIG. 3B is a cylindrical portion and an upper cone of the metal mold. The expanded sectional view which shows the shape of the boundary part with a part, (c) is an expanded sectional view which shows the shape of the lower side peeling start part of this metal mother mold, (d) is the cylindrical part and lower cone of this metal mother mold It is an expansion perspective view which shows the shape of the boundary part with a part.
4 is a perspective view showing a method for producing a seamless endless flexible member using the metal matrix shown in FIG. 3; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Belt-like organic photoreceptor 1a Belt running roller 2 Charging part 3 Exposure part 4 Sleeve-like developing part 5 Transfer part 6 Conveying belt 7 Sleeve-like fixing part 7a Fixing roller 7b Pressure roller 8 Belt-like organic photoreceptor (or conveying belt)
9 Endless guide 10 Seamless endless member 11 Flange 12 Image forming photoconductor substrate 13 Upper end portion 14 Lower end portion 15 Peeling start portion 16 Peeling start portion 17 Dotted line 18 Dotted line 19 The diameter of the metal matrix body is reduced Lower end 20 Auxiliary electrode ring 21 Insulating ring 22 Spacing 23 Insulating flange 24 Spacing 25 Silicone rubber packing part 26 Insulating flange 27 Rubber storage part 28 Cylindrical upper end part of metal base (upper end part of metal base body)
29 Cutter knife 30 Metal mold 40 Electroforming tank 41 Cover plate 42 Motor 43 Anode bag 44 Anode bag 45 Nozzle 46 Nozzle 50 Diaphragm cathode case (cylindrical titanium anode)
51 Liquid Level Position of Electroforming Liquid (Plating Liquid) 52 Upper Position of Metal Mold Body 53 Supply Pipe

Claims (5)

A deposition film peeling start portion is formed on the outer peripheral surface of the cylindrical portion of the cylindrical metal matrix body, and an auxiliary electrode ring having an outer diameter smaller than the outer diameter of the cylindrical portion is provided coaxially at the lower end portion of the cylindrical portion, the cylindrical metal matrix outer peripheral surface and said auxiliary electrode ring outer peripheral surface of the cylindrical portion the lower end of the body, the electroforming process for cylindrical metal mold thus spacing diameter direction is set to an appropriate value of the auxiliary electrode ring A method for producing a seamless flexible endless member by electroforming using:
In the cylindrical portion of the cylindrical metal matrix main body, the outer peripheral surface of the upper end and the outer peripheral surface of the lower end are formed on the surface of the auxiliary electrode ring, and the outer peripheral surface of the upper end and the lower end of the auxiliary electrode ring are formed on surfaces without corners, respectively.
An electroforming liquid (plating liquid) having a nickel sulfamate concentration of 450 to 550 g / l and a sodium saccharin concentration of 20 to 100 ppm is placed in an electroforming tank, and the metal matrix is immersed in the electroforming liquid as a cathode. The upper end of the cylindrical part is 10 to 30 mm below the liquid level, and a cylindrical anode is immersed in the electroforming liquid to surround the metal matrix, and the distance between these two electrodes is 80 to 150 mm. 45 to 55 ° C., a manufacturing method of seamless flexible endless member and performing electroforming a conductive析電flow as 5~10A / dm ² and temperature. A deposition film peeling start portion is formed on the outer peripheral surface of the cylindrical portion of the cylindrical metal base body, and the auxiliary electrode ring having a width of 5 to 15 mm and an outer diameter of 0.5 to 3 mm smaller than the outer diameter of the cylindrical portion is The coaxial electrode ring is provided coaxially at the lower end of the portion, and the distance between the outer peripheral surface of the lower end portion of the cylindrical portion of the cylindrical metal base body and the outer peripheral surface of the auxiliary electrode ring is set to 3 to 15 mm in the diameter direction of the auxiliary electrode ring. A method for producing a seamless endless flexible member by electroforming using a cylindrical metal mold for electroforming,
In the cylindrical portion of the cylindrical metal matrix main body, the outer peripheral surface of the upper end and the outer peripheral surface of the lower end are formed on the surface of the auxiliary electrode ring, and the outer peripheral surface of the upper end and the lower end of the auxiliary electrode ring are formed on surfaces without corners, respectively.
An electroforming liquid (plating liquid) having a nickel sulfamate concentration of 450 to 550 g / l and a sodium saccharin concentration of 20 to 100 ppm is placed in an electroforming tank, and the metal matrix is immersed in the electroforming liquid as a cathode. The upper end of the cylindrical part is 10 to 30 mm below the liquid level, and a cylindrical anode is immersed in the electroforming liquid to surround the metal matrix, and the distance between these two electrodes is 80 to 150 mm. 45 to 55 ° C., a manufacturing method of seamless flexible endless member and performing electroforming a conductive析電flow as 5~10A / dm ² and temperature. The non-cornered surface is formed by pressing a silicone rubber having a thickness of 0.5 to 1.5 mm and a rubber hardness of 40 to 55 degrees with a resin insulating ring, and a thickness of 0.5 to The method for producing a seamless endless flexible member according to any one of claims 1 and 2, wherein 1.5 mm silicone rubber is housed and fixed . The silicone rubber is stored and fixed in a resin insulating ring 0.5 to 2 mm larger than the outer peripheral surface of the upper end and the lower end of the cylindrical outer peripheral surface of the cylindrical metal matrix and the outer peripheral surfaces of both ends of the auxiliary electrode ring. The method for producing a seamless flexible endless member according to claim 3, wherein the method is performed by pressing. The method for producing a seamless seamless endless member according to any one of claims 1 to 4, wherein the seamless endless flexible member is a photosensitive substrate for an image forming apparatus .

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