JP2008216308A - Manufacturing method of cylindrical substrate for electrophotographic photoreceptor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the manufacturing method of a cylindrical substrate for electrophotographic photoreceptor, with which a substrate surface defect can be removed while maintaining a cut surface having a ten-point average height Rzjis of 0.3 μm or less and, thereby, the substrate having no surface defect and having high uniformity of outer circumferential surface can be obtained at a low cost. <P>SOLUTION: The manufacturing method of cylindrical substrate for electrophotographic photoreceptor comprises: a process of cutting the outer circumferential surface of a drawn pipe and, thereby, preparing a pipe material of which the surface is finished so as to have a ten-point average height Rzjis of 0.3 μm or less; and a process of arranging a magnetic field generating means on the inner part of the pipe material of which the surface is finished so as to have a ten-point average height Rzjis of 0.3 μm or less, causing a rubbing member having a soft magnetic material to be brought into contact with the outer circumferential surface of the pipe material which is finished so as to have a ten-point average height Rzjis of 0.3 μm or less and flow, and rubbing the outer circumferential surface of the pipe material. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing a cylindrical substrate for an electrophotographic photosensitive member, and more particularly to a rubbing method for eliminating defects on the outer peripheral surface of the cylindrical substrate for an electrophotographic photosensitive member.

  An electrophotographic image forming apparatus, a so-called electrophotographic apparatus, forms an electrostatic latent image on the surface of an electrophotographic photosensitive member by charging means and exposure means, and visualizes the electrostatic latent image by developing means (electrophotography). Processes are generally used.

  In order to obtain a high-quality image by the electrophotographic process, it is necessary to keep the distance between the electrophotographic photosensitive member and the developing member (developing sleeve or developing roller) constant. It is necessary that the photographic photosensitive member and the developing member have high accuracy. In particular, in an electrophotographic apparatus that performs color image output, it is necessary to superimpose images of each color, and in order to prevent color misregistration, color unevenness, and moire, a highly accurate electrophotographic photosensitive member or developing member is required. .

  On the other hand, an electrophotographic photosensitive member and a developing member are generally produced by subjecting a surface of a highly accurate cylindrical substrate (hereinafter simply referred to as “substrate”) to surface treatment or film formation as necessary. If there is a defect on the substrate surface, a uniform photosensitive layer cannot be obtained, resulting in a defect in the output image. In an electrophotographic apparatus that outputs a high-quality color image (for example, an electrophotographic apparatus that requires high color reproducibility of a halftone image assuming an image output including a photographic image), a high-quality halftone image output is required. The substrate surface is also severely defective. As described above, an electrophotographic apparatus that performs color image output requires a substrate that is particularly highly accurate and free from surface defects. As a base used in an electrophotographic apparatus, generally, a cylindrical body (element tube) obtained by cutting a tube material manufactured by extrusion processing or drawing processing into a predetermined length is used. Furthermore, if necessary, the end of the cylindrical body (element tube) is processed into a predetermined shape (end processing), and the outer peripheral surface of the cylinder (element tube) is processed to a predetermined accuracy and surface roughness (finished surface). processing).

  Examples of the outer peripheral surface processing for obtaining a high-precision substrate include cutting and grinding, for example, but cutting using a lathe is often used as a processing method with few defects on the surface of the substrate. Further, in order to obtain a particularly uniform substrate surface, an example of performing so-called specular cutting that uses a flat cutting tool or a single crystal cutting tool with a large cutting edge radius to obtain a glossy surface with a 10-point average height Rzjis of 0.3 μm or less. Is also known. (See JP-A-11-327187 (Patent Document 1)) However, in actual production, even if the cutting conditions are optimized by using an appropriate lathe and an appropriate cutting tool, the conditions may vary depending on the wear of the tool during cutting. The phenomenon described below occurred, and it was impossible to eliminate all scratches on the substrate surface. Phenomena that generate scratches on the surface of the substrate during cutting are as follows: (1) Chip scratches generated when cutting chips are caught between the cutting tool and the pipe, and (2) Constructed cutting edge is formed at the tip of the tool. Scratches generated on the outer peripheral surface of the cylindrical body due to this, and (3) When the cutting edge is worn and the cutting edge is reduced as the number of cuttings progresses, the end of the cutting groove rises due to plastic flow, and burr is generated. Surface defects due to such phenomenon occur. In particular, if there is a scratch having a convex portion on the substrate, a coating defect may occur due to the convex portion serving as a nucleus when the photosensitive layer is applied, and even a small scratch may cause an image defect. In addition, when a high voltage is applied to the electrophotographic photosensitive member in the charging process, a phenomenon (leak) in which a current flows due to conduction at a convex flaw portion may occur, and spots and streaks may appear in the image. Further, the leak may cause problems such as trouble in the electrophotographic apparatus and inability to be charged. As a method for obtaining an electrophotographic photoreceptor free from image defects in the conventional cutting techniques as described above, examples of a post-processing method for eliminating defects on the substrate surface, concealing defects on the substrate surface. An example of a method for performing processing so as not to cause defects in the photosensitive layer. Examples of conventional techniques for post-processing that eliminate defects on the substrate surface will be given below.

  1) A polishing method using a polishing sheet, for example, a superfinishing method (see Japanese Patent Application Laid-Open No. 2005-121937 (Patent Document 2)) in which polishing is performed while applying a small amplitude vibration to a grindstone, and a tape polishing method using a polishing tape (Japanese Patent Application Laid-Open 4-223476 (see Patent Document 3)) and the like are known. However, the polishing method using the polishing sheet takes a long time for the polishing process, and the production efficiency is not good, and is not suitable for mass production. In addition, there is a problem in that consumables such as a polishing sheet are required and the cost is increased.

  2) Surface finishing processing method using chemical means, for example, electrolytic polishing method (see Japanese Patent Application Laid-Open No. 2003-084470 (Patent Document 4)), grinding of passivating film with abrasive material and elution of metal by electrolysis in combination. An electrolytic composite machining method (see Japanese Patent Laid-Open No. 58-139153 (Patent Document 5))) and the like are known. These surface finishing methods using chemical means are excellent in productivity and do not require consumables, but there is a problem that the wastewater treatment is expensive and expensive.

  3) A method in which abrasive grains and the like are repeatedly collided to make the surface uneven, such as a wet honing method (see Japanese Patent Application Laid-Open No. 2005-292363) (Patent Document 6)), a dry honing method (Japanese Patent Application Laid-Open No. 11-327187 (Patent Document)). Reference 1)) is known. The method of making the surface uneven by repeatedly colliding abrasive grains etc. is easy to drainage treatment, inexpensive and excellent in productivity, but in the process of making the unevenness, a scale-like defect occurs on the surface, and the scale-like defect is also generated during cleaning. In some cases, the film is turned up, causing a coating defect and a leak, resulting in an image defect.

  4) A method in which abrasive grains and the like are repeatedly collided by using magnetism to make the surface uneven, for example (see JP-A-2003-305634 (Patent Document 7)) (see JP-A-2005-46999 (Patent Document 8)). Are known. However, the method of making the surface uneven by repeatedly colliding abrasive grains using the above-mentioned magnetism has the effect of roughening the surface of the substrate, but it causes polishing scratches and the surface roughness after treatment becomes excessively large. -The problem of causing cracks and spots occurred, and it could not be used as it is as a substrate for an electrophotographic photosensitive member.

Conventionally, the substrate has good cost, productivity, environmental load and good surface formed by cutting, in particular, the surface has a 10-point average height Rzjis of 0.3 μm or less and the surface is glossy, so-called cutting mirror surface is maintained. There was no production method for obtaining a good substrate for an electrophotographic photosensitive member by eliminating the cutting scratches.
Japanese Patent Laid-Open No. 11-327187 Japanese Patent Laid-Open No. 2005-121937 JP-A-4-223476 JP 2003-084470 A JP 58-139153 A JP 2005-292363 A JP 2003-305634 A JP 2005-46999 A

  An object of the present invention is to provide a cylinder for an electrophotographic photosensitive member that eliminates substrate surface defects while maintaining a cut surface with a 10-point average height Rzjis of 0.3 μm or less, has no surface defects, and has high outer peripheral surface uniformity. Another object of the present invention is to provide a method for producing a substrate.

  1st invention is the manufacturing method of the cylindrical base | substrate for electrophotographic photoreceptors, The process which cuts the outer peripheral surface of a drawn tube material, and produces the pipe material by which the 10-point average height Rzjis of the surface was finished to 0.3 micrometer or less . And a magnetic field generating means is disposed inside the tube finished to have a 10-point average height Rzjis of 0.3 μm or less on the surface, and the 10-point average height Rzjis of a rubbing member having a soft magnetic material is 0.3 μm or less. A method for producing a cylindrical substrate for an electrophotographic photosensitive member, comprising a step of contacting and flowing the outer peripheral surface of the finished pipe material and rubbing the outer peripheral surface of the tube material.

  According to a second aspect of the present invention, the surface of the rubbing member having the soft magnetic material is composed of a member having a hardness lower than that of the cylindrical support member. It is a manufacturing method of a support body.

A third invention is T _1, T ₁ the minimum value of the distance Torieru rubbing member gravity center position and the plane in the form of rubbing member is on the plane of the rubbing member is a minimum value having the soft magnetic material wherein the rubbing member from a state placed on a plane, the maximum value of the distance between the rubbing member centroid position and the plane in the case where rolled 90 degrees in any direction while in contact with the plane and T ₂ as, the T ₂ of the when T ₂ is rolled the rubbing member to choose a direction such as to minimize when the T _3, 1, 2 Section of T ₁ and T ₃ is equal to or satisfying the following formula It is a manufacturing method of the cylindrical base | substrate for electrophotographic photoreceptors as described.

T ₃ ≧ T ₁ × 3
A fourth invention is a method for producing a cylindrical substrate for an electrophotographic photosensitive member according to any one of claims 1 to 3, wherein a rubbing member having a porous elastic member on the surface is mixed in the rubbing step. .

  According to a fifth aspect of the present invention, there is provided an electrophotographic photosensitive apparatus in which a magnetic rubbing member is brought into contact with a surface of a tube material having a maximum surface height Ry of 0.3 .mu.m or less by cutting the outer peripheral surface and performing surface treatment. In the body substrate manufacturing method, (1) a step of installing the tube material in a treatment tank in which the soft magnetic rubbing member is accommodated, and (2) the magnetic field generating means is inserted into the tube material and softened. A step of bringing a rubbing member having magnetism into contact with the tube, and (3) a step of operating the magnetic field generating means to cause the rubbing member having soft magnetism to flow and rub against the outer peripheral surface of the tube. ) A step of taking out the magnetic field generator from the inside of the tube and separating the rubbing member having magnetism; (5) A cylindrical support from the non-magnetic treatment tank in which the member having soft magnetism is accommodated. A step of taking out It is a manufacturing method of the electrophotographic photoreceptor cylindrical substrate according to fourth paragraph to.

  The effect of the present invention is that a cylindrical substrate for an electrophotographic photosensitive member having high accuracy and no defects is obtained by treating a cutting surface having a ten-point average height Rzjis of 0.3 μm or less by the rubbing method using magnetism of the present invention. The manufacturing method is obtained. Furthermore, the method for producing a cylindrical substrate for an electrophotographic photosensitive member of the present invention has high productivity and high yield. The electrophotographic photosensitive member using the cylindrical substrate produced by the method of the present invention has no coating defects and no charging leak, and outputs a high-quality image without image defects when mounted on an electrophotographic apparatus. Can do. In particular, if an electrophotographic photosensitive member using a cylindrical body manufactured by the manufacturing method of the present invention is attached to an electrophotographic apparatus for color image output, a high-quality image can be obtained.

  The method for producing a cylindrical substrate for an electrophotographic photosensitive member of the present invention, particularly the rubbing method of the substrate surface, is carried out by bringing a rubbing member having soft magnetism into contact with the surface of the tube finished to a mirror surface by cutting. This is a method for producing a substrate for an electrophotographic photosensitive member. An example of the rubbing treatment apparatus and rubbing processing step of the present invention will be described with reference to FIG.

  (1) The description about the process which accommodates in the rubbing treatment tank 102 the pipe material 101 (cylindrical workpiece) finished by the cutting surface whose Rzjis is 0.3 micrometer or less. In this step, the pipe material 101 is held by the pipe material holding means 103 and is installed in the rubbing treatment tank 102 by the pipe material lifting / lowering means 104. At this stage, the rubbing member 106 (hereinafter simply referred to as the rubbing member) having soft magnetism is located in the lower portion 107 in the rubbing treatment tank and does not enter the inside of the tube 101 when the tube 101 is installed.

  (2) Description of the step of inserting the magnetic field generating means 108 into the tube 101 and bringing the rubbing member 106 into contact with the tube 101. In this step, the magnetic field generating means 108 is inserted into the tube material 101 so that the rubbing member 106 staying in the rubbing process inner lower portion 107 is attracted by magnetic force and brought into contact with the outer periphery of the tube material 101. The magnetic field generation means 108 has a structure that can be moved up and down by the magnetic field generation means elevating means 110 and can be inserted into the tube 101 or taken out of the tube 101. Further, the tube material 101 is structured such that the upper portion is sealed by the tube material holding means 103 and the lower portion is sealed by the lower tube material receiving portion 105 so that the rubbing member 106 does not enter the inside of the tube material 101.

  (3) Description of the process of operating the magnetic field generating means 108 to cause the rubbing member 106 to flow and rub against the tube outer peripheral surface 101. In this step, the magnetic field generating means 108 is caused to reciprocate and rotate in a predetermined process by the magnetic field generating means lifting / lowering means 110 and the magnetic field generating means rotating means 109, thereby causing the rubbing member 106 to flow and rubbing the tube outer peripheral surface 101. Grind.

  (4) Description of the step of taking out the magnetic field generator from the inside of the tube and separating the rubbing member. In this process, the rubbing member 106 that has been in contact with the tube material 101 is detached from the tube material 101 by extracting the magnetic field generating means 108 from the inside of the tube material 101 to the outside. The rubbing member 106 is separated from the tube material 101 and returned to the lower portion 107 in the rubbing treatment tank.

  (5) Description of the process of taking out the tube material 101 (the tube material is polished to render the outer peripheral defect harmless and become a base) from the rubbing treatment tank in which the rubbing member is accommodated. In this step, the pipe material 101 is held by the pipe material holding means 103 and is discharged out of the rubbing treatment tank 102 by the pipe material lifting / lowering means 104. At this time, since the rubbing member 106 having magnetism is returned to the lower portion 107 in the processing tank, it is possible to discharge the tube material 101 (base body) that has been processed without spilling from the polishing processing tank 102.

  Since the discharged tube material 101 (cylindrical substrate for electrophotographic photosensitive member) has burrs remaining on its surface, it is washed and a photosensitive layer is formed to obtain an electrophotographic photosensitive member.

  Examples of the base material of the present invention include metals such as aluminum, copper, magnesium and titanium and alloys thereof, and nonmagnetic materials such as materials obtained by conducting a conductive treatment on a base such as plastic, ceramic and glass ( A substance that repels when the magnetic pole is brought close is called a diamagnetic substance, a substance that is attracted to some extent is called a paramagnetic substance, and these two are industrially non-magnetic substances). If it is ferromagnetic (substance that is strongly attracted to the magnetic poles), it has the effect of confining the magnetic field in the tube 101, and the time remains even after the magnetic field generating means rotating means 110 is released, so that the rubbing member 106 is properly separated. The problem that it is not carried out occurs. Among non-magnetic materials, aluminum or an aluminum alloy such as JIS-A3000 (Al-Mn) is available as a readily available material that has moderate strength, corrosion resistance, and can be easily processed into a high-precision cylindrical body. Type, JISA5000 (Al-Mg) system or JIS-A6000 (Al-Mg-Si) system is particularly preferable.

  Examples of the method for producing the tube material used as the base of the cylindrical substrate for the electrophotographic photosensitive member of the present invention include deep drawing processing, ironing processing, extrusion processing, and drawing processing. As a particularly preferred example, there is a method (ED method) in which a hollow pipe extruded by a mandrel method or a porthole method is manufactured, and a thin tube material is manufactured by drawing one or more stages. The tube material thus manufactured is cut into a predetermined length to obtain a cylindrical body (element tube). These materials are further finished into a highly accurate cylindrical body. As a means for this, for example, in the case of metal, grinding processing such as centerless polishing, cutting processing such as lathe processing, etc. can be used alone or in combination. As a particularly preferred example, a cutting tube finished by high-precision lathe processing is preferable as a substrate for an electrophotographic photosensitive member of an electrophotographic apparatus that has high runout accuracy and good surface roughness and outputs a high-quality color image.

  As an example of a processing method for finishing the cylindrical substrate for an electrophotographic photosensitive member of the present invention to a cutting surface having an Rzjis of 0.3 μm or less, the surface of the surface with a cutting tool is fixed while rotating the cylindrical body (element tube) on a high-precision lathe. There is a way to finish. The cutting tool is composed of metal such as super steel, ceramic, diamond (sintered diamond, single crystal diamond), etc., and the cutting tool tip shape is square (sword tool) arc (R tool), straight (flat tool) ), A combination of flat and square (miracle bite) can be used. Furthermore, with the aim of reducing scratches by cutting chips and reducing the addition of cutting tools, the rough cutting tool and the finishing tool are fixed to the tool base at a predetermined interval, and the cutting tool is followed by the finishing tool. There is also an example in which scanning is performed with two bytes.

  As a method of finishing a cylindrical substrate to a glossy cutting surface (mirror surface) with Rzjis of 0.3 μm or less, finishing cutting by a straight line (flat tool) and a combination of flat and square (called a miracle tool) is preferable. When Rzjis is larger than 0.3 μm, the unevenness on the outer periphery of the substrate may affect the image, and the electrophotographic device intended for high-quality color output may affect the image quality. Therefore, the cylindrical substrate for an electrophotographic photosensitive member needs to have a surface roughness Rzjis of 0.3 μm or less before the surface treatment of the present invention. As a method for evaluating the surface in the previous period, the definition of the surface roughness is based on JIS-B0601: 01, ISO-4287: 97, and ISO-1302: 02. A commercially available surface roughness meter (for example, SE3500 manufactured by Kosaka Laboratory Ltd.) can be used as the measuring means. The measurement conditions for the surface in the previous period are those using a conical needle with a measurement length of 8 mm, a cutoff of 0.8 mm or more, and a tip of the measurement needle of R10 μm.

  In actual production, chips generated during cutting are wound between the cutting tool and the pipe material, resulting in scratches. Constitutive cutting edge scratches that occur when the cutting edge is formed by the tube material adhering to the tip of the cutting tool during cutting. In a situation where the cutting edge is worn due to cutting and cannot be cut properly, and when the angle design of the cutting edge is not appropriate for the properties of the pipe material, the end of the cutting groove rises due to plastic flow, and burr scratches occur. It has been impossible to eliminate the cutting defects on the outer peripheral surface of the cylindrical substrate due to the above factors in all cases during production. However, even if burrs are caused by scratches on the substrate surface, swells in the vicinity of the scratches, or burr due to the treatment of the present invention, the burrs can be scraped or laid by rubbing with the rubbing member. It has become possible. Therefore, even if a cutting defect occurs by the polishing method of the present invention, it becomes possible to eliminate an image defect without causing a coating defect or a leak.

  The configuration of the rubbing treatment apparatus of the present invention will be described. The inside of the rubbing treatment tank 102 is preferably a container for housing the rubbing member 106 having magnetism, and is a container that can be sealed during processing so that the rubbing member 106 does not leak. The tube material holding means 103 has a structure capable of holding and detaching the tube material 101, and when holding the tube material, it is preferable to hold the end portion of the tube material 101 from the inner surface. By holding from the inner surface, it is possible to uniformly treat the entire end of the tube material. The polishing apparatus preferably has a structure in which both ends of the tube material 101 can be sealed so that the rubbing member 106 does not enter the tube material during the polishing process. The pipe material holding means 103 is connected to the elevating means 104, holds the pipe material 101, transports it, and installs it on the pipe material 101 at a predetermined location in the processing tank 102. The lower end portion of the tube material 101 is held by a lower tube material receiving portion 105. It is preferable that the tube receiving portion 105 has a conical shape, and the rubbing process is configured to seal the end of the tube 101 so that the rubbing member 106 does not enter. The rubbing member 106 is a soft magnetic material that does not have magnetization when there is no external magnetic field, and uses a material that strongly magnetizes when a magnetic field is applied. Examples include pure iron, silicon iron, permalloy, sendust and the like. It is also possible to use a resin in which the soft magnetic material is dispersed.

  In the surface treatment using magnetism according to the present invention, only the scratched portion of the substrate surface cut into a good surface and defects in the vicinity thereof are eliminated, and the surface has a soft magnetism so as not to scratch the surface other than the scratched portion. It is necessary that the surface of the rubbing member is a member having a lower hardness than the member of the cylindrical support.

  If the hardness is high, burr on the surface of the substrate can be eliminated, but there is a possibility that the surface of the substrate will be damaged by the rubbing member and a new scratch will be generated. As the standard of hardness, Mohs hardness, Vickers hardness (HV), Brinell hardness (HB), Shore hardness (HS), Rockwell C hardness (HRC), etc. can be used.

  The aluminum alloy has a Mohs hardness of 2.9 and a Vickers hardness of 50 to 70, and the rubbing member of the present invention is formed on a soft magnetic material such as pure iron, silicon iron, permalloy, or sendust. A resin such as vinyl chloride resin and polyurethane resin, a resin such as butyl rubber and natural rubber, and a rubbing member coated with rubber are preferred. The measuring method of Vickers hardness is based on JIS-Z2244.

  As described above, the effect of the present invention is to scrape or lay down the burrs caused by cutting and burring of the substrate surface by rubbing with a rubbing member. In the present invention, the burrs on the substrate surface are scraped off by rubbing with a rubbing member. However, if the scraped burrs accumulate in the processing tank, they may reattach to the cylindrical substrate surface. In order to prevent reattachment, it is preferable to mix a rubbing member having a porous elastic member on the surface in the step of rubbing. By mixing a porous elastic member such as a foamed polyurethane resin or a polyvinyl acetal resin, the burrs scraped off can be taken into the elastic member to prevent the burrs from reattaching to the substrate.

  The action of the rubbing treatment of the present invention is to scrape or lay down the burrs caused by cutting scratches and burr caused by cutting of the surface of the substrate by using magnetism. For this reason, the rubbing member is not a structure that rolls on the surface of the substrate, but a flat structure that slides on the surface of the substrate so that the frictional force scrapes the burrs on the surface of the substrate.

The shape of the rubbing member for causing the base surface to scrape off burrs on the base surface by the frictional force with a structure that slides on the base surface will be described. Compared with the state of the minimum value of the distance rubbing member barycentric position a plane can take when placing the rubbing member on the plane T _1, T ₁ places the said rubbing member to a minimum value on a plane, the slip There the maximum value of the distance between the rubbing member centroid position and the plane in the case where rolled 90 degrees in any direction while in contact with said plane so as not to generate a T _2, a direction such that T ₂ is minimum it is preferable to satisfy the following formula the value of T ₂ of the when rolled selected when the T _3.

T ₃ ≧ T ₁ × 3
Examples of the shape of the rubbing member satisfying the above conditions include a ring shape (for example, FIG. 3) having a space at the center and a ring on the outer periphery, a disk shape (a sphere crushed vertically, for example, FIG. 4), A flat shape (a shape having a substantially constant thickness of a circle, an ellipse, or an oval shape with a reduced angle, for example, FIG. 5) can be given.

  For example, when the shape of the rubbing member is a ring shape as shown in FIG. 3, the smallest of the lines passing through the center of gravity (111 in FIG. 3) connecting the two points on the rubbing member surface and outside the ring. When R (substantially the minimum value of the ring diameter, 112 in FIG. 3) is T and the average wall thickness is T (113 in FIG. 3), R is more than three times T. Preferably there is.

Further, when the shape of the rubbing member having the soft magnetic material is, for example, a disc shape: for example, FIG. 4 and a flat shape: for example, FIG. 5, the minimum value of the outer diameter of the disc shape or the flat shape is R (substantially a disc). Part, flat part diameter: 115 in FIG. 4, 118 in FIG.
Of the lines connecting the two points on the surface of the rubbing member and passing through the disc-shaped and flat center of gravity (114 in FIG. 4 and 117 in FIG. 5), the length of the line having the minimum length is T (substantially In addition, the average thickness of the disk-shaped and flat portions: 116 in FIG. 4 and 119 in FIG.

  That is, by setting the minimum length (shortest diameter) of the flat part to three times or more of the wall thickness, the rubbing member does not roll, and the base surface can be rubbed.

  Furthermore, since the rubbing member does not damage the substrate during the rubbing treatment, a shape having no corners is preferable.

  Furthermore, examples include a case where a lubricant for reducing friction, an abrasive for increasing the polishing power, and lubricating oil are mixed into the handrail member as necessary.

  A tube material receiving portion 105 is provided in the lower part of the rubbing treatment tank 102. The tube material receiving portion 105 performs a positioning operation when the tube material 101 is installed, and further has a structure in which the rubbing member 106 which is sealed at the bottom and has magnetism during the polishing process does not enter the inside of the tube material 101. In order to allow the magnetic field generating means 108 to be taken in and out, a conical shape having a hole in the center is preferable.

  Examples of the magnetic field generating means 108 of the present invention include permanent magnets using strong ferromagnetic materials such as carbon steel, neodymium magnets, ferrite magnets, alnico magnets, pure iron, silicon iron, permalloy, sendust, etc. Examples thereof include an electromagnet made by winding a coil around a soft magnetic material and passing an electric current. Examples of the method for causing the rubbing member to flow include a method for moving the permanent magnet and a method for controlling the magnetic field of the electromagnet. Examples of the magnetic field include rotation and translation. When the workpiece is a cutting process using a lathe, it is preferable that the magnetic field be moved in parallel because cutting flaws often enter the circumferential direction. By reciprocating and rotating the magnetic field generating means lifting / lowering means 110 and magnetic field generating means rotating means 109 in a predetermined process, the rubbing member 106 is caused to flow, and the outer peripheral surface 101 of the tube material is rubbed and polished.

  When the cylindrical body processed by the rubbing treatment method using magnetism of the present invention is used as a cylindrical substrate for an electrophotographic photosensitive member, the photosensitive layer provided on the substrate is an inorganic photosensitive layer using an inorganic photoconductive substance. Or an organic photosensitive layer using an organic photoconductive substance, or a laminated photosensitive layer separated into a charge generating layer containing a charge generating substance and a charge transporting layer containing a charge transporting substance. It may be. Further, between the support and the photosensitive layer, a conductive layer for the purpose of preventing interference fringes due to laser light interference and covering substrate defects, or an intermediate layer having a barrier function or an adhesive function may be provided. Further, a protective layer may be provided on the photosensitive layer for the purpose of protecting the photosensitive layer.

  Examples of the protective layer include a resin that is cured by electron beam, ultraviolet light, and heat, and further, a material in which a lubricant is dispersed in the resin.

  As described above, an excellent cylindrical substrate for an electrophotographic member can be obtained by processing the cylindrical substrate on a glossy cutting surface having an Rzjis of 0.3 μm or less by the rubbing treatment method using magnetism of the present invention. Can do. The cylindrical substrate produced by the method of the present invention is used not only for an electrophotographic photosensitive member but also as a substrate for other electrophotographic cylindrical substrates (developing sleeve, developing roller, charging roller, feeding roller, fixing roller). When it is mounted on an electrophotographic apparatus, there is no image defect and a high-quality image can be output. In particular, if an electrophotographic photosensitive member using a cylindrical body manufactured by the manufacturing method of the present invention or a developing member is attached to an electrophotographic apparatus for color image output, a high-quality image can be obtained.

  FIG. 2 shows an example of a schematic configuration of an electrophotographic apparatus provided with a process cartridge having the electrophotographic photosensitive member of the present invention.

  In FIG. 2, reference numeral 1 denotes a cylindrical electrophotographic photosensitive member, which is driven to rotate at a predetermined peripheral speed in the direction of an arrow about an axis 2.

  The surface of the electrophotographic photosensitive member 1 that is rotationally driven is uniformly charged to a predetermined positive or negative potential by a charging unit (primary charging unit: charging roller or the like) 3, and then subjected to slit exposure, laser beam scanning exposure, or the like. Exposure light (image exposure light) 4 output from exposure means (not shown) is received. In this way, electrostatic latent images corresponding to the target image are sequentially formed on the surface of the electrophotographic photosensitive member 1.

  The electrostatic latent image formed on the surface of the electrophotographic photoreceptor 1 is developed with toner contained in the developer of the developing unit 5 having a developing member (developing sleeve, developing roller, etc.) to become a toner image. Next, the toner image formed and supported on the surface of the electrophotographic photoreceptor 1 is transferred from a transfer material supply means (not shown) to the electrophotographic photoreceptor 1 and the transfer means by a transfer bias from a transfer means (transfer roller or the like) 6. 6 (contact portion) is sequentially transferred onto a transfer material (paper or the like) P taken out and fed in synchronization with the rotation of the electrophotographic photosensitive member 1.

  The transfer material P that has received the transfer of the toner image is separated from the surface of the electrophotographic photosensitive member 1 and introduced into the fixing means 8 to receive the image fixing, and is printed out as an image formed product (print, copy). Is done.

  The surface of the electrophotographic photosensitive member 1 after the transfer of the toner image is cleaned by a cleaning means (cleaning blade or the like) 7 to remove the developer (toner) remaining after transfer, and further from a pre-exposure means (not shown). After being subjected to charge removal processing by pre-exposure light (not shown), it is repeatedly used for image formation. As shown in FIG. 2, when the charging unit 3 is a contact charging unit using a charging roller or the like, pre-exposure is not necessarily required.

  Among the above-described components such as the electrophotographic photosensitive member 1, the charging unit 3, the developing unit 5, the transfer unit 6 and the cleaning unit 7, a plurality of components are housed in a container and integrally combined as a process cartridge. The process cartridge may be configured to be detachable from an electrophotographic apparatus main body such as a copying machine or a laser beam printer. In FIG. 2, the electrophotographic photosensitive member 1, the charging unit 3, the developing unit 5 and the cleaning unit 7 are integrally supported to form a cartridge, and the electrophotographic apparatus is used by using a guide unit 10 such as a rail of the electrophotographic apparatus main body. The process cartridge 9 is detachable from the main body.

  Hereinafter, the present invention will be described in more detail with reference to specific examples. However, the present invention is not limited to these. In the examples, “part” means “part by mass”. Moreover, the definition of the surface roughness in an Example is based on JIS-B0601: 01, ISO-4287: 97, ISO-13302: 02. The definition of geometric deviation is based on JIS-B0021 and JIS-B0621. The measuring method of Vickers hardness is based on JIS-Z2244.

Hollow pipe (aluminum alloy JIS-A3003) Vickers hardness 65 manufactured by extrusion processing and drawing processing by porthole method is cut, outer diameter D ₁ = 60.3 mm, inner diameter 56.6 mm, length 364 mm A cylindrical body (element tube) was obtained.

Next, the outer diameter part (position 30 mm from the end part) of the cylindrical body (element tube) is held by the collet chuck with a both-end processing machine (BSZ-600 manufactured by Egro Co., Ltd.), and both ends are cut and processed. Finishing to L ₁ = 360 mm, 0.4 C chamfering was performed on the entire circumference of both the outer and inner ends of the cylindrical body (element tube).

  Next, the outer peripheral surface of the cylindrical body (workpiece) was cut by a lathe machining apparatus (trade name: EX-550, manufactured by Egro Co., Ltd.) driven by both axes. The cutting conditions of the cylindrical body (workpiece) were a spindle rotation speed of 4000 rpm, and the cutting tool feed pitch per rotation of the cylindrical body (workpiece) was 0.1 mm / rev. The cutting tool is an R0.2 sintered diamond R tool (Tokyo Diamond Tool Mfg.) And a natural diamond miracle tool (Tokyo Diamond Tool Mfg.) Fixed at a distance of 10 mm on one cutting tool fixing base. The outer peripheral part was cut by a cutting method in which the miracle bite followed the rough cutting after the preceding and rough cutting. The cutting depth was set (the cutting allowance at the radius was 0.07 mm for R bite, 0.03 mm for miracle bite, 0.10 mm in total). Further, 1000 pieces were cut continuously by the same method as in Example 1. As a result of measuring the surface roughness, Rzjis was 0.13 μm on average and 0.30 μm at maximum. As the surface evaluation method, the surface roughness was defined by JIS-B0601: 01, ISO-4287: 97, and ISO-1302: 02 (SE3500, manufactured by Kosaka Laboratory Ltd.). As measurement conditions, a measurement length of 8 mm, a cut-off of 0.8 mm or more, and a tip of the measurement needle was a R10 μm conical needle. As a result of visual inspection of the appearance of the outer peripheral surface of the cylindrical body, scratches were poor. The content consists of 68 chips and scratches that are generated by cutting between the cutting tool and the pipe. Thirty-two constituent cutting edge flaws are generated by forming the cutting edge by attaching the material of the tube material to the cutting tool tip during cutting. The cutting groove end was swelled by plastic flow, and 50 burr scratches were generated. The surface portion of the obtained cylindrical substrate surface where scratches were present was measured with a surface roughness meter to verify whether or not there was a convex portion, but a convex portion having a thickness of 1.5 μm from 0.5 was present.

  The following rubbing treatment process was performed on 1000 cylindrical substrates using the rubbing treatment apparatus of FIG. (1) Tubing 101 finished by cutting (workpiece) held by the pipe holding means 103 and installed in the rubbing treatment tank 102 by the pipe lifting / lowering means 104. (2) The magnetic field generation means 108 is inserted into the tube material, and the rubbing member 106 having soft magnetism is brought into contact with the tube material 101 (workpiece). (3) While rotating the magnetic field generating means 108 from the upper end to the lower end of the tube 101 (workpiece) at 100 rpm, the rubbing member 106 is made to flow up and down at 30 cycles / minute to cause the rubbing member 106 to flow and rub the tube outer peripheral surface 101. . (4) By pulling out the magnetic field generating means 108 from the inside of the tube material, the magnetic rubbing member 106 that has been in contact with the tube material 101 is detached from the tube material 101 to thereby remove the magnetic rubbing member 106. Was returned to the lower part 107 in the rubbing treatment tank. (5) The pipe material 101 was held by the pipe material holding means 103 and discharged out of the rubbing treatment tank 102 by the pipe material lifting means 104. The processing time was 60 seconds per bottle.

  As the rubbing member, a soft iron core material having a diameter of 0.5 mm was formed into a ring shape having a diameter of 10 mm and further covered with a polyurethane resin (Vickers hardness 40). The shape of the rubbing member after coating was, as shown in FIG. 3, the shortest diameter 112 of the ring portion was 11.0 mm, and the wall thickness 113 was 1.5 mm.

  Next, the cylindrical body subjected to the rubbing treatment is immersed in a 10% aqueous solution of a surfactant (trade name: Van Rise (registered trademark) 20S, manufactured by Tokiwa Chemical Co., Ltd.) and subjected to ultrasonic wave (38 KHz) while applying ultrasonic waves (38 KHz). Degreased and washed for a minute. Further, after rinsing with a shower of deionized water, the substrate was immersed and heated in deionized water at 80 ° C., and then pulled up at 30 mm / s to obtain a dried (warm water pulling method) electrophotographic photosensitive member cylindrical substrate.

  The surface of the electrophotographic photosensitive member cylindrical substrate surface where scratches were present before the rubbing treatment was measured with a surface roughness meter to verify whether or not there was a protrusion, but a protrusion with a height of 0.3 μm or more. There was no. As a result of visual evaluation of the surface of the cylindrical body of the electrophotographic photosensitive member, five electrophotographic photosensitive members were re-attached to the surface of the substrate by the rubbing treatment. Image evaluation after applying the photosensitive layer There was no problem.

  Next, 8 parts of polyamide resin (trade name: Amilan (registered trademark) CM8000, manufactured by Toray Industries, Inc.) and methoxymethylated 6 nylon resin (trade name: Toresin (registered trademark) EF-30T, Teikoku Chemical Co., Ltd.) 12 parts) was dissolved in a mixed solvent of 300 parts of methanol / 200 parts of n-butanol to prepare an intermediate layer coating solution. This intermediate layer coating solution was dip coated on the conductive layer and dried with hot air at 100 ° C. for 10 minutes to form an intermediate layer having a thickness of 0.5 μm.

  Next, 6 parts of an azo pigment (charge generation material) having a structure represented by the following formula:

ポリビニルブチラール樹脂（商品名：ＢＸ−１、積水化学工業（株）製）５部、および、シクロヘキサノン７０部を、ガラスビーズを用いたサンドミル装置で８時間分散し、エチルアセテート１００部を加えて電荷発生層用塗布液を調製した。

Disperse 5 parts of polyvinyl butyral resin (trade name: BX-1, manufactured by Sekisui Chemical Co., Ltd.) and 70 parts of cyclohexanone in a sand mill apparatus using glass beads for 8 hours, and add 100 parts of ethyl acetate to charge. A coating solution for the generation layer was prepared.

  This charge generation layer coating solution was dip-coated on the intermediate layer and dried by heating at 90 ° C. for 10 minutes to form a charge generation layer having a thickness of 0.15 μm.

  Next, 8 parts of an amine compound having a structure represented by the following formula:

下記式で示される構造を有するアミン化合物４部、

4 parts of an amine compound having a structure represented by the following formula:

および、ビスフェノールＺ型のポリカーボネート樹脂（商品名：ユーピロン（登録商標）Ｚ−２００、三菱ガス化学（株）製）１０部を、モノクロロベンゼン８０部／ジメトキシメタン２０部の混合溶剤に溶解して電荷輸送層用塗布液を調製した。前記電荷輸送層用塗布液を、電荷発生層上に浸漬塗布し、１２０℃で４０分間乾燥して、膜厚が１６μｍの電荷輸送層を形成した。

Further, 10 parts of bisphenol Z-type polycarbonate resin (trade name: Iupilon (registered trademark) Z-200, manufactured by Mitsubishi Gas Chemical Co., Ltd.) is dissolved in a mixed solvent of 80 parts of monochlorobenzene / 20 parts of dimethoxymethane to charge. A transport layer coating solution was prepared. The charge transport layer coating solution was dip coated on the charge generation layer and dried at 120 ° C. for 40 minutes to form a charge transport layer having a thickness of 16 μm.

  In this manner, an electrophotographic photoreceptor having a charge transport layer as a surface layer was produced. The obtained electrophotographic photosensitive member had an outer diameter of 60.0 mm and a length of 360.0 mm. As a result of visual evaluation of the obtained electrophotographic photosensitive member, five electrophotographic photosensitive members having burrs scraped off by the rubbing treatment on the surface of the substrate were found.

  Next, a polycarbonate end engaging member (trade name: Iupilon (registered trademark), manufactured by Mitsubishi Gas Chemical Co., Ltd.) is attached to the end of the produced electrophotographic photosensitive member, and this is attached to a cyanoacrylate adhesive ( (Product name: Aron Alpha: manufactured by Toagosei Co., Ltd.) to obtain an electrophotographic photosensitive member unit.

  The electrophotographic photosensitive member unit thus produced is mounted on a four-color tandem color copier (product name: Color Laser Copier 5000, a modified machine manufactured by Canon Inc.), and a halftone image is output and evaluated. Went. The results are shown in Table 1. The halftone image is evaluated by outputting an image in which one image exposure laser light writing effective line and two white lines are alternately scanned in the vertical direction and the horizontal direction, and defects appearing on the image. Was visually observed. Furthermore, although 50,000 images were output, no leak occurred.

  In Example 1, the rubbing member 106 is disc-shaped, and the disc-shaped core material having a diameter of 8.0 mm and a thickness of 2.0 mm is further coated with a vinyl chloride resin (Vickers hardness 20). Using FIG. 4, the shape of the rubbing member after clothing was FIG. 4, the diameter 115 of the disc part was 9.0 mm, and the wall thickness 116 was 3.0 mm. Further, an electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 1 except that 10 g of a foamed urethane resin sphere having a diameter of 5.0 mm was added. The results are shown in Table 1. The rubbing process required 60 seconds to eliminate burrs. As a result of visual evaluation of the obtained 1000 electrophotographic photoreceptors, an electrophotographic photoreceptor in which burrs scraped off by rubbing treatment on the substrate surface could not be found.

  In Example 1, as shown in FIG. 5, a flat elliptical longest diameter, 10.0 mm shortest diameter 118, 4.0 mm wall thickness 119, 0.3 mm elliptical core material and butyl rubber resin (Vickers hardness 25 The electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 1 except that the rubbing member 106 covered in (1) was added and (Diana Fresia N90: manufactured by Idemitsu Kosan Co., Ltd.) was added as a lubricating oil. The rubbing process required 60 seconds to eliminate burrs. The results are shown in Table 1.

  In Example 2, a rubbing member 106 in which a disc-shaped core material having a diameter of 8.0 mm and a thickness of 3.0 mm is further coated with a vinyl chloride resin (Vickers hardness 20) is used. An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 2 except that the diameter 115 was 9.0 mm and the thickness 116 was 4.0 mm. The results are shown in Table 1. The rubbing treatment required 90 seconds to eliminate burrs. As a result of visual evaluation of the obtained 1000 electrophotographic photoreceptors, an electrophotographic photoreceptor in which burrs scraped off by rubbing treatment on the substrate surface could not be found.

  An electrophotographic photosensitive member was produced in the same manner as in Example 1 except that the coating was changed to a polyester resin (Vickers hardness 80) in Example 1, and the electrophotographic photosensitive member was further produced in the same manner as in Example 1. Were prepared and evaluated. The results are shown in Table 1. Many fine scratches existed on the surface of the substrate, and the halftone image was gritty, but it was a non-defective product level.

  In Example 1, after the cylindrical body (workpiece) was cut, a soft iron core material having a diameter of 0.5 mm was cut into a length of 7 mm, covered with a polyurethane resin (Vickers hardness 40), and the rubbing member 106. Table 1 shows the results of producing an electrophotographic photosensitive member in the same manner as in Example 1 except that it was used as an electrophotographic photosensitive member. Further, an electrophotographic photosensitive member was produced in the same manner as in Example 1 and evaluated with an electrophotographic photosensitive device. .

  There are many small scratches on the surface of the substrate,

  In Example 1, an electrophotographic photosensitive member was produced in the same manner as in Example 1 except that it was used as the rubbing member 106 without being coated with a resin. Further, an electrophotographic photosensitive member was produced in the same manner as in Example 1. Table 1 shows the results of evaluation with an electrophotographic apparatus. Many fine scratches existed on the surface of the substrate, and the halftone image was gritty, but it was a non-defective product level.

(Comparative Example 1)
In Example 1, an electrophotographic photosensitive member was produced in the same manner as in Example 1 without cutting after the cylindrical body (workpiece) was cut, and the electrophotographic photosensitive member was prepared in the same manner as in Example 1. Table 1 shows the results of the production and evaluation with an electrophotographic apparatus.

(Comparative Example 2)
In Example 1, the finish cutting of the cylindrical body (workpiece) was a R4 bite. The surface roughness of the workpiece after cutting was 0.5 to 1.0 μm in Rzjis. An electrophotographic photosensitive member is produced by rubbing as in Example 1. Further, an electrophotographic photosensitive member is produced in the same manner as in Example 1, and the results of evaluation with an electrophotographic apparatus are shown in Table 1.

(Comparative Example 3)
In Example 1, after cutting a cylindrical body (workpiece), a soft iron core material having a diameter of 0.5 mm is cut into a length of 10 mm, and the surface is formed by repeatedly colliding abrasive grains using magnetism without being coated. The surface roughness Rmax was 1.8 μm (see Japanese Patent Application Laid-Open No. 2003-305634 (Patent Document 8)). Further, an electrophotographic photosensitive member was prepared in the same manner as in Example 1, and the results of evaluation using an electrophotographic apparatus are shown in Table 1.

１）標中の電子写真感光体円筒状基体表面キズの良否は摺擦処理前にキズが存在した部分を表面粗さ計で表面形状測定し凸部があるか検証し、０．１μｍ以下の凸部しか存在しない円筒状基体を良とした。０．１μｍより大きく０．３μｍ以下の凸部が存在する円筒状基体は微小キズありとした。

1) The surface defect of the electrophotographic photosensitive member cylindrical substrate in the mark is checked by measuring the surface shape with a surface roughness meter at the surface where the scratches existed before the rubbing treatment, and verifying whether there are any protrusions of 0.1 μm or less. A cylindrical substrate having only convex portions was regarded as good. A cylindrical substrate having a convex portion larger than 0.1 μm and not larger than 0.3 μm was considered to have a fine scratch.

2) Image ○: No particularly good defect occurs.

    Δ: No streak but streak-like scars are observed.

X: Defects are 0.6 μm or more and the result of confirmation in the output image is a defective level. In Comparative Example 1, coating defects were observed when an electrophotographic photosensitive member was formed due to burrs caused by scratches generated during cutting. In addition, an image that is output by being incorporated in an electrophotographic apparatus that outputs a high-quality color image (for example, an electrophotographic apparatus that requires high color reproducibility of a halftone image assuming image output including a photographic image) is scratched. A spot was generated in a portion corresponding to, and a leak was generated.

  In Comparative Example 2, cutting before the rubbing treatment was rough, so that when the electrophotographic photosensitive member was used, cutting streaks remained on the surface. Furthermore, an image streak occurred in a portion corresponding to a streak in the image output by incorporating it in an electrophotographic apparatus that outputs a high-quality color image, and a leak occurred.

  In Comparative Example 3, the surface of the substrate after the treatment was rough and many polishing scratches were observed. Further, an image output by incorporating it in an electrophotographic apparatus that outputs a high-quality color image showed a gritty defect in the image of the halftone portion, and a leak occurred.

It is explanatory drawing of the grinding | polishing apparatus of this invention. 1 is a diagram illustrating an example of a schematic configuration of an electrophotographic apparatus including a process cartridge having an electrophotographic photosensitive member. Plan view 3-A and sectional view 3-B of the rubbing member used in Example 1 Plan view 4-A and sectional view 4-B of the rubbing member used in Example 2 Plan view 5-A and sectional view 5-B of the rubbing member used in Example 3

Explanation of symbols

101 Pipe material (workpiece)
DESCRIPTION OF SYMBOLS 102 Rubbing processing tank 103 Pipe material holding means 104 Tube material holding means raising / lowering means 105 Lower pipe material receiving part 106 Soft rubbing member 107 Lower part in processing tank 108 Magnetic field generating means 109 Magnetic field generating means rotating means 110 Magnetic field generating means raising / lowering means 111 Center point of the ring-shaped rubbing member of Example 1 112 Minimum value of the diameter of the ring-shaped rubbing member of Example 1 113 Average value of the ring-shaped rubbing member thickness of Example 1 114 Disk-shaped rubbing of Example 2 Center point of rubbing member 115 Minimum value of disc-shaped rubbing member diameter of Example 2 116 Average value of disc-shaped rubbing member thickness of Example 2 117 Center point of elliptical rubbing member of Example 3 118 Example 3 Minimum value of elliptical rubbing member diameter 119 Average value of elliptical rubbing member thickness of Example 3 1 Electrophotographic photosensitive member 2 Axis 3 Charging means 4 Exposure light 5 Developing means 6 Transfer means 7 Leaning means 8 fixing means 9 process cartridge 10 guide means P transfer material

Claims (5)

  In the method for producing a cylindrical substrate for an electrophotographic photosensitive member, a step of cutting a peripheral surface of a drawn tube material to produce a tube material having a 10-point average height Rzjis of 0.3 μm or less. And a magnetic field generating means is disposed inside the tube finished to have a 10-point average height Rzjis of 0.3 μm or less on the surface, and the 10-point average height Rzjis of a rubbing member having a soft magnetic material is 0.3 μm or less. A method for producing a cylindrical substrate for an electrophotographic photosensitive member, comprising the step of contacting and flowing the outer peripheral surface of the finished pipe material and rubbing the outer peripheral surface of the tube material.   2. The cylindrical support for an electrophotographic photosensitive member according to claim 1, wherein the surface of the rubbing member having the soft magnetic material is composed of a member having a hardness lower than that of the member of the cylindrical support. Method. Wherein the minimum value of the distance Torieru rubbing member gravity center position and the plane in the form of rubbing member is on the plane of the rubbing member as T _1, T ₁ takes a minimum value rubbing with the soft magnetic material from a state of placing the member on a plane, the maximum value of the distance between the rubbing member centroid position and the plane in the case where rolled 90 degrees in any direction while in contact with the plane and T _2, the T ₂ minimum the T ₂ of the when rolled the rubbing member is taken as T ₃ to choose a direction such that, electrophotography according to claim 1, wherein T ₁ and T ₃ is equal to or satisfying the following formula A method for producing a cylindrical substrate for a photoreceptor.
T ₃ ≧ T ₁ × 3   4. The method for producing a cylindrical substrate for an electrophotographic photosensitive member according to claim 1, wherein a rubbing member having a porous elastic member is mixed in the surface in the rubbing step.   An electrophotographic photosensitive member that is subjected to surface treatment by bringing a rubbing member having a soft magnetic material into contact with the surface of a tube whose outer peripheral surface is cut and finished with a ten-point average height Rzjis of 0.3 μm or less. (1) a step of installing the tube material in a treatment tank in which the rubbing member having soft magnetism is housed, and (2) a method of inserting the magnetic field generating means into the tube material and soft magnetism. A step of bringing a rubbing member having a contact with the tube, (3) a step of operating the magnetic field generating means to cause the rubbing member having soft magnetism to flow and rubbing on the outer peripheral surface of the tube, (4) A step of taking out the magnetic field generator from the inside of the tube and separating the rubbing member having magnetism; (5) taking out a cylindrical support from a non-magnetic treatment tank containing the soft magnetic member; Having a process Method for producing an electrophotographic photoreceptor cylindrical substrate of claim 1, wherein.

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