JP4262124B2 - Cutting method and method for producing electrophotographic photosensitive member using the cutting method - Google Patents

Description

The present invention relates to a cutting method and a method for producing an electrophotographic photosensitive member using the cutting method .

  An electrophotographic image forming apparatus, a so-called electrophotographic apparatus, forms a latent electrostatic image on the surface of an electrophotographic photosensitive member by a charging unit and an exposing unit, and visualizes the electrostatic latent image by a developing unit (electronic A photo process is generally adopted.

  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. .

  The electrophotographic photosensitive member and the developing member are generally produced by subjecting the surface of a high-precision cylindrical support to surface treatment or coating formation as necessary. In general, a cylindrical body (element tube) obtained by cutting a tubular material manufactured by extrusion or drawing into a predetermined length is used as the cylindrical support. If necessary, the end of the cylindrical body (element tube) is processed into a predetermined shape (end processing), and after the end processing, the cylinder (element tube) is held by holding means (chuck). In this state, the outer peripheral surface of the cylindrical body (element tube) is finished to a predetermined accuracy and surface roughness (peripheral surface processing).

  As the outer peripheral surface processing, for example, while rotating the cylindrical body (element tube) after the end portion processing, while contacting the cutting bite, while moving the cutting bit parallel to the rotation axis of the cylindrical body (element tube), A method of cutting the outer peripheral surface of the cylindrical body (element tube), so-called lathe machining, is often used.

  An example of lathe processing will be described with reference to FIG.

  A cylindrical body (workpiece) 101 is prepared in which both end faces of a raw tube obtained by extrusion processing or drawing processing are adjusted to a predetermined shape.

  With respect to the cylindrical body 101, a side 102 (hereinafter referred to as a cutting start side) with which the cutting bit 109 abuts at the start of cutting is held by the holding means 103, and a side 104 (hereinafter referred to as a cutting end side) with which the cutting bit 109 abuts at the end of cutting. Hold by the holding means 105.

  The cylindrical body 101 is rotated by the rotating means 106 via the holding means 105.

  A cutting bit 109 is fixed on a cutting bit fixing base 108 installed on the guide rail 107, and the cutting bit 109 is moved while being in contact with the cylindrical body 101, and the outer peripheral surface of the cylindrical body 101 is cut.

  In FIG. 1, the moving direction of the cutting tool 109 is the direction of the arrow 110.

  In the cutting process, heat is generated due to friction between the cylindrical body 101 and the cutting tool 109, shear deformation of the cylindrical body 101, etc., but most of the generated heat is removed together with chips. In addition, it is possible to reduce the amount of heat generated by selecting the cutting tool 109 material and cutting edge shape, selecting the cutting oil, and optimizing the cutting conditions such as the cutting speed.

  However, part of the generated heat remains and accumulates in the cylindrical body, and raises the temperature of the cylindrical body during the cutting process. Then, during cutting, the temperature on the cutting end side 104 becomes higher than the temperature on the cutting start side 102.

  Normally, in a cutting method of cutting the outer peripheral surface of the cylindrical body 101 using a lathe, the cutting tool 109 cuts the outer peripheral surface of the cylindrical body 101 while moving in parallel with the axis of the cylindrical body (workpiece) 101. As shown in FIG. 2C, immediately after the cutting process, the outer diameter of the cylindrical body 101 is processed uniformly.

  However, when the cylindrical body 101 after the cutting is cooled and the entire cylindrical body 101 returns to room temperature almost uniformly, the temperature on the cutting end side 104 is higher than that on the cutting start side 102 as shown in FIG. Since the descending width is large, there is a problem that the cutting end side 104 contracts more than the cutting start side 102 and the outer diameter of the cutting end side 104 finally becomes smaller than the outer diameter of the cutting start side 102.

  The following examples are given as conventional techniques for solving this problem.

  As a prior art (1), there is a method of blowing cutting oil together with a gas (see Japanese Patent Application Laid-Open No. 2002-066871 (Patent Document 1)). However, with this method, the cooling capacity is insufficient to obtain a highly accurate cylindrical support, and a cylindrical support having a uniform outer diameter cannot be obtained.

  As a prior art (2), a method of cutting while applying a large amount of cutting oil to a cylindrical body is also known (see Japanese Patent Application Laid-Open No. 2003-015325 (Patent Document 2)). However, the process using a large amount of cutting oil has a high risk of ignition, and the load of the cleaning process is large and the cost is high. A method of using an emulsion-based cutting oil in which oils and fats are emulsified and dispersed in water or a water-based cutting fluid (see JP-A-07-0777814 (Patent Document 3)) can also be mentioned. The problem of stains and corrosion occurred, and the cylindrical support could not be produced stably.

As a prior art (3), in an NC control (numerical control) lathe, the outer diameter of a sample prepared in advance is measured, and the distance between the cutting tool and the axis of the cylindrical body is changed by numerical input based on the measurement result. A method for improving the outer diameter uniformity of a cylindrical body after cutting is known. However, in the NC control lathe, the distance between the cutting tool and the axis of the cylindrical body is digitally controlled, so it cannot be changed completely smoothly, and it is inevitable that a subtle step is formed when changed. . In an electrophotographic apparatus that performs color image output, color unevenness occurs due to this step, and a problem that a good image cannot be obtained occurs.
JP 2002-66871 A JP 2003-15325 A JP-A-7-77814

An object of the present invention is to solve the above-mentioned problems occurring in a cutting method of cutting the outer peripheral surface of a cylindrical body using a lathe having a cutting tool, and to provide a low-cost and highly uniform outer diameter cutting method for a cylindrical body. It is in.

Another object of the present invention is to provide a method for producing an electrophotographic photosensitive member having the cylindrical body having a high outer diameter uniformity as a support and suppressing occurrence of color unevenness.

The present invention relates to a cutting method for cutting an outer peripheral surface of a cylindrical body using a lathe having a cutting tool, wherein the cutting start side of the cylindrical body located at a contact portion between the cylindrical outer peripheral surface and the cutting tool at the start of cutting is provided. Heating using a heating means, providing a temperature difference between the temperature on the cutting start side of the cylindrical body and the temperature on the cutting end side of the cylindrical body, and cutting the outer peripheral surface of the cylindrical body This is a cutting method.

Further, the present invention provides a method for producing an electrophotographic photosensitive member having a photosensitive layer on a support, wherein the support is a cylindrical support having an outer peripheral surface cut by the cutting method, and the cylindrical support An electrophotographic photosensitive member production method comprising producing a photosensitive layer by forming a photosensitive layer on a photosensitive member.

According to the present invention, the above problem was solved occurring in the cutting method for cutting the outer circumferential surface of the cylindrical body using a lathe with a cutting tool, to provide a method of cutting the outer diameter evenness high cylinder at low cost Can do.

In addition, according to the present invention, it is possible to provide a method for producing an electrophotographic photosensitive member having the cylindrical body having a high outer diameter uniformity as a support and suppressing occurrence of color unevenness.

  Usually, in the cutting method of cutting the outer peripheral surface of the cylindrical body 101 using a lathe, the cutting tool 109 cuts the outer peripheral surface of the cylindrical body 101 while moving in parallel with the axis of the cylindrical body 101. As shown in FIG. 3, immediately after the cutting process, the outer diameter of the cylindrical body 101 is processed uniformly.

  According to the conventional cutting method, when the cylindrical body 101 after the cutting is cooled and the whole returns to room temperature almost uniformly, as shown in FIG. Since the temperature drop is larger, the cutting end side 104 contracts more than the cutting start side 102, and the outer diameter of the cutting end side 104 is finally smaller than the outer diameter of the cutting start side 102. appear.

In contrast, in the cutting method of the present invention, as shown in FIG. 3 (b), the switching cutting initiator 102 from among the cutting start side 102 and the cutting completion side 104 of the cylinder 101 is warmed, the cutting By reducing the temperature difference of the cylindrical body 101 during processing, after the cutting process (FIG. 3C), the cylindrical body 101 is cooled and the entire cylindrical body returns to room temperature (FIG. 3D). )), The uniformity of the outer diameter of the cutting start side 102 and the outer diameter of the cutting end side 104 is improved.

In general, the change in length LΔ when the temperature of a cylindrical body having a length L rises to T at temperature T ₀ is L (T−T ₀ ) A (A is the linear expansion coefficient of the cylindrical body). . Similarly, when the temperature of the cylindrical body having the diameter R rises to T at the temperature T ₀ , the diameter change RΔ is | R (T−T ₀ ) A | (A is the linear expansion coefficient of the cylindrical body).

In lathe processing, after processing, it is common to adjust to the room temperature of the room where the workpiece is processed. It is assumed that the cylindrical body, which is a workpiece before starting the cutting, is sufficiently familiar with the room temperature T ₀ , and the cutting start side when the cutting tool comes into contact with the cutting start side to perform the cutting processing on the cutting start side. when a temperature of T _1, a cutting tool on the cutting completion side was T ₂ the temperature of the cutting completion side when performing cutting of contact with the cutting finishing side, starts cutting by performing the cutting The diameter change ΔR ₁ on the side becomes | R (T ₁ −T ₀ ) A |, and the diameter change ΔR ₂ on the cutting end side becomes | R (T ₂ −T ₀ ) A |.

After being cut to the outer diameter of homogeneity by the cylinder center axis parallel to the moving cutting bit of (workpiece), the cylindrical body (workpiece) is sufficiently cooled, the entire cylinder is turned to room temperature T ₀ The difference in diameter S ₁₂ between the cutting start side and the cutting end side at this time is | ΔR ₁ −ΔR ₂ | = | R (T ₁ −T ₂ ) A |.

When the difference in diameter S ₁₂ between the cutting start side and the cutting end side is to be within S, the cutting start side T ₁ and the cutting end side are set so that S ≧ | R (T ₁ −T ₂ ) A | it is necessary to adjust the temperature T _2.

  When the cylindrical body whose outer peripheral surface is cut is used as a support for an electrophotographic photosensitive member, particularly when it is used as a support for an electrophotographic photosensitive member for an electrophotographic apparatus for outputting a color image, the above S is 0.010 mm. The following is preferable.

  The cylindrical body whose outer peripheral surface is cut by the cutting method of the present invention is suitably used as a support (cylindrical support) for an electrophotographic member such as an electrophotographic photosensitive member or a developing member (developing sleeve or developing roller). .

  As a material of the cylindrical body, when used as a support for an electrophotographic member, any material having conductivity can be used. For example, metals such as aluminum, copper, iron, nickel, titanium, alloys thereof, and plastics , Ceramics, glass and the like that have been subjected to a conductive treatment. Among these, aluminum or an aluminum alloy of 3000 (Al—Mn), 5000 (Al—Mg), or 6000 (Al—Mg—Si) is preferable.

  As a manufacturing method of the tube material from which the cylindrical body is based, for example, a method of manufacturing a bottomed tube material (DI method) by processing into a cup shape by deep drawing and then extending the wall of the cup by ironing. Then, it is processed into a cup shape by impact extrusion, and then the wall of the cup is stretched by ironing, and a method of manufacturing a tube with a bottom (Method II), and the pipe obtained by extrusion is stretched by ironing, Examples thereof include a method for producing a thin-walled tube material (EI method) and a method for producing a thin-walled tube material by extrusion after extrusion (ED method). In addition, there is a method of manufacturing a highly accurate pipe material by drawing one or more hollow pipes extruded by the porthole method. The tube material thus manufactured is cut into a predetermined length to obtain a cylindrical body (element tube).

  Also, pre-processing for holding by end means with predetermined accuracy (perpendicularity, parallelism) and lathe processing at both ends of the cylindrical body (element tube) by cutting or grinding is performed. .

  When the cylindrical body whose outer peripheral surface is cut by the cutting method of the present invention is used as a support for an electrophotographic photosensitive member, the photosensitive layer provided on the support may be an inorganic photosensitive layer using an inorganic photoconductive substance. An organic photosensitive layer using an organic photoconductive material, or a laminated photosensitive layer separated into a charge generation layer containing a charge generation material and a charge transport layer containing a charge transport material. Also good. In addition, a conductive layer for the purpose of preventing interference fringes due to scattering of laser light, coating of scratches on the support, and an intermediate layer having a barrier function and an adhesive function are provided between the support and the photosensitive layer. Also good. Further, a protective layer may be provided on the photosensitive layer for the purpose of protecting the photosensitive layer.

  As described above, according to the cutting method of the present invention, a cylindrical body suitably used as a support for an electrophotographic member can be obtained. The cylindrical body whose outer peripheral surface is cut by the cutting method of the present invention has good outer diameter uniformity. If the cylindrical body whose outer peripheral surface is cut by the cutting method of the present invention is used as a support for an electrophotographic photosensitive member or a developing member (developing sleeve or developing roller), the electrophotographic photosensitive member can be used when these are mounted on an electrophotographic apparatus. The distance between the body and the developing member is kept constant, and there is no image unevenness during development and no image shift during transfer, and a high-quality image can be output. In particular, when an electrophotographic photosensitive member or developing member using a cylindrical body whose outer peripheral surface is cut by the cutting method of the present invention as a support is attached to an electrophotographic apparatus for color image output, each color image is superimposed. Image unevenness can be prevented.

  The cylindrical body whose outer peripheral surface has been cut by the cutting method of the present invention is not only used as a support for an electrophotographic photosensitive member or a developing member, but also for other electrophotographic members such as a charging roller, a feeding roller, and a fixing roller. Also, it can be suitably used.

  FIG. 4 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. 4, reference numeral 1 denotes a cylindrical electrophotographic photosensitive member, which is rotationally driven in a direction of an arrow about a shaft 2 at a predetermined peripheral speed.

  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. 4, when the charging unit 3 is a contact charging unit using a charging roller or the like, pre-exposure is not always necessary.

  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. 4, 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”. The definition of the geometric deviation in the examples is based on JIS-B0021 and JIS-B0621.

(Example 1)
A hollow pipe (aluminum alloy JIS-A3003, linear expansion coefficient is 23.2 × 10 ⁻⁶ ) manufactured by extrusion and drawing is cut to have an outer diameter of 60.4 mm, an inner diameter of 58.6 mm, and a length of 364 mm. A cylindrical body (element tube) was obtained.

  Next, the inner diameter part of the cylindrical body (element tube) is held, and both ends are cut to finish to a total length of 360 mm, an end face perpendicularity of 50 μm or less, and an end face parallelism of 10 μm or less. Chamfered.

  Next, the outer peripheral surface is cut by using the above cylindrical body (element tube) as a workpiece by a lathe machining apparatus (trade name: RL-700, manufactured by Egro Co., Ltd., as shown in FIG. 5). did. The room temperature was 20 ° C., and the temperature of the cylindrical body (element tube) before cutting was also 20 ° C. 5, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110 are in the same order as in FIG. 1, the cylindrical body, the side on which the cutting bite 109 abuts at the start of cutting, and the holding means. The cutting tool 109 comes into contact with the cutting tool 109 at the end of cutting (the cutting tool end side), holding means, rotating means, guide rail, cutting tool fixture, cutting tool, and cutting tool 109 moving direction.

Next, the cylindrical body (element tube) cutting start side was heated by the heating means 111, and the cutting was started after adjusting the temperature T ₁ = 28 ° C. on the cutting start side.

Machining conditions were as follows: a taper-shaped clamp was used as the holding means, the spindle rotation speed was 3500 rpm, the feed pitch per rotation of the cylinder (element tube) being the workpiece was 0.08 mm / rev, and R0. A rough cutting was performed with a cutting diamond cutting tool of No. 2 with a cutting depth of 0.2 mm, and a final cutting with a cutting diamond cutting tool of R6 with a cutting depth of 0.03 mm. Temperature T ₂ of the cutting completion side became 30 ° C..

  The cylindrical body whose outer peripheral surface was cut in this way had an outer diameter of 59.940 mm and a length of 360.0 mm at a position 20 mm from the end portion on the cutting start side. This cylindrical body is measured with a laser length measuring machine (manufactured by Shinko Co., Ltd.) by rotating the outer diameter of the 20 mm portion of the cylindrical body by 45 degrees from the end of the cutting start side, measuring four points, and taking the average value to start cutting. The outer diameter of the end was used. Further, the outer diameter of the 20 mm portion cylindrical body from the end portion on the cutting end side was also rotated by 45 degrees and measured at four points, and the average value was taken as the outer diameter on the end portion on the cutting end side. The results are shown in Table 1.

  Next, the lathe-finished cylindrical body was immersed in a 10% aqueous solution of a surfactant (trade name: Van Rise 20S, manufactured by Tokiwa Chemical Co., Ltd.) and degreased and washed for 2 minutes while applying ultrasonic waves. Further, after rinsing with a shower of deionized water, heating was performed by immersing in deionized water at 80 ° C., followed by drying at 30 mm / s (hot water pulling method).

  The cylindrical body after drying was used as a support.

Next, a mixed solvent of 9 parts SnO ₂ coated barium sulfate (conductive particles), 5 parts titanium oxide (for resistance adjustment), 6 parts phenol resin, and 3 parts methanol / 23 parts methoxypropanol was dispersed. A coating solution for a conductive layer was prepared.

  This conductive layer coating solution was dip coated on a support and thermally cured at 150 ° C. for 20 minutes to form a conductive layer having a thickness of 15 μm.

  Next, 8 parts of polyamide resin (trade name: Amilan CM8000, manufactured by Toray Industries, Inc.) and 12 parts of methoxymethylated 6 nylon resin (trade name: Toresin EF-30T, manufactured by Teikoku Chemical Co., Ltd.) are mixed with methanol. An intermediate layer coating solution was prepared by dissolving in a mixed solvent of 300 parts / 200 parts of n-butanol.

  This intermediate layer coating solution was dip-coated on the conductive layer and dried in hot air at 100 ° C. for 10 minutes to form an intermediate layer having a thickness of 0.8 μm.

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

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 0.23 μm.

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

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

Further, 10 parts of a bisphenol Z type polycarbonate resin (trade name: Iupilon Z-200, manufactured by Mitsubishi Gas Chemical Co., Ltd.) is dissolved in a mixed solvent of 80 parts of monochlorobenzene / 20 parts of dimethoxymethane and applied for a charge transport layer. A liquid was prepared.

  This charge transport layer coating solution was dip coated on the charge generation layer and dried at 130 ° C. for 40 minutes to form a charge transport layer having a thickness of 14 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.

  Next, an end engaging member made of polycarbonate (trade name: Iupilon, manufactured by Mitsubishi Gas Chemical Co., Inc.) is attached to the end of the produced electrophotographic photosensitive member, and this is attached to a cyanoacrylate adhesive (trade name: Aron Alpha). : Toagosei Co., Ltd.) to prepare 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, manufactured by Canon Inc.), and a halftone image is output for evaluation. It was. The results are shown in Table 1. The halftone image evaluation method outputs an image in which one effective line and two white lines are alternately scanned in the vertical and horizontal directions, and the image density difference ΔE ≦ 2 is used as a reference for image unevenness. .

(Examples 2 to 4)
In Example 1, the position of the cutting tool is adjusted so that the outer diameter after cutting becomes 59.940 mm at a position 20 mm from the end portion on the cutting start side, and the temperature on the cutting start side when cutting is shown in Table 1. An electrophotographic photosensitive member was produced and evaluated in the same manner as in Example 1 except that it was changed. The results are shown in Table 1.

(Comparative Example 1)
In Example 1, the position of the cutting tool was adjusted so that the outer diameter after cutting was 59.940 mm at a position 20 mm from the end portion on the cutting start side, and the heating means 111 was not operated. In the same manner as above, an electrophotographic photoreceptor was prepared and evaluated. The results are shown in Table 1.

(Comparative Example 2)
In Example 1, an electrophotographic photosensitive member was produced in the same manner as in Example 1 except that the outer peripheral surface of the cylindrical body was cut by the method of the prior art (2) instead of the cutting method of the present invention. evaluated. The results are shown in Table 1.

(Comparative Example 3)
In Example 1, an electrophotographic photosensitive member was produced in the same manner as in Example 1 except that the outer peripheral surface of the cylindrical body was cut by the method of the prior art (3) instead of the cutting method of the present invention. evaluated. The results are shown in Table 1.

  In Comparative Example 1, since the outer diameter uniformity of the cylindrical body was inferior to that of the example, the outer diameter uniformity of the electrophotographic photosensitive member using the cylindrical body as a support was also inferior to that of the example. was there.

  In Comparative Example 2, the outer diameter uniformity of the cylindrical body was good, but a stain due to cutting oil remained on the outer peripheral surface of the cylindrical body, and it was obtained using an electrophotographic photosensitive member using the same as a support. The output image had image defects due to the spots.

  In Comparative Example 3, since the distance between the bite and the axis of the cylindrical body was digitally controlled, the distance could not be changed completely smoothly and a step was formed, and the output image had color unevenness due to the step. It was.

It is a figure explaining the example of lathe processing. It is a figure explaining the cutting method which cuts the outer peripheral surface of the conventional cylindrical body. It is a figure explaining the cutting method which cuts the outer peripheral surface of the cylindrical body 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. It is a figure explaining the lathe process in the Example of this invention.

Explanation of symbols

101 Cylindrical body 102 Side on which cutting tool 109 abuts at the start of cutting (cutting start side)
103 Holding means 104 Side on which cutting tool 109 abuts at the end of cutting (cutting end side)
DESCRIPTION OF SYMBOLS 105 Holding means 106 Rotating means 107 Guide rail 108 Cutting tool fixed stand 109 Cutting tool 110 Moving direction of cutting tool 109 1 Electrophotographic photosensitive member 2 Axis 3 Charging means 4 Exposure light 5 Developing means 6 Transfer means 7 Cleaning means 8 Fixing means 9 Process cartridge 10 Guide means P Transfer material

Claims (3)

In the cutting method of cutting the outer peripheral surface of the cylindrical body using a lathe having a cutting tool, a heating means is used to heat the cutting start side of the cylindrical body located at the contact portion between the cylindrical outer peripheral surface and the cutting tool at the start of cutting. A cutting method characterized by cutting the outer peripheral surface of the cylindrical body by using the temperature to provide a temperature difference between the temperature on the cutting start side of the cylindrical body and the temperature on the cutting end side of the cylindrical body. Wherein the temperature of the cutting start side of the cylindrical body located in the contact portion between the cutting starting cylinder outer peripheral surface and the cutting byte and T _{1 [℃],} those of the cutting end of the cylinder outer peripheral surface and the cutting tool when the temperature of the cutting completion side of the cylindrical body located in the contact portion and T _{2 [℃],} the diameter of a circle cylindrical body before starting the cutting and R [mm], the linear expansion coefficient of the circular cylinder was a, The cutting start side of the cylindrical body located at the contact portion between the outer peripheral surface of the cylindrical body and the cutting bite at the start of cutting so that T ₁ , T ₂ , R and A satisfy the relationship represented by the following formula (1): the warmed, cutting method according to claim 1, characterized in that cutting the outer circumferential surface of the cylindrical body.
0.010 ≧ | R (T ₁ −T ₂ ) A | (1) The manufacturing method of the electrophotographic photosensitive member having a photosensitive layer on a support, the support is a cylindrical support which outer circumferential surface is cut by a cutting method according to claim 1 or 2, cylindrical shaped A method for producing an electrophotographic photosensitive member, comprising producing a photosensitive layer by forming a photosensitive layer on a support .

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