JP3756211B2 - Manufacturing method of substrate for electrophotographic photosensitive member - Google Patents

Description

本テストに使用した工程のフローは第１図の通りである。
【０００９】
【発明の効果】
本発明により、電子写真感光体用基体の製造方法に於いて格段に歩留りの良い製造プロセスを確立できる。[0001]
[Industrial application fields]
The present invention relates to an ironing process used for manufacturing a substrate for an electrophotographic photosensitive member such as a copying machine for plain paper and a laser beam printer.
[0002]
[Prior art]
Conventionally, as a method of manufacturing a thin-walled, high-precision, light-weight electrophotographic photosensitive drum that has a cylindrical shape, as a method of obtaining a product by subjecting an aluminum or aluminum alloy pipe manufactured by extrusion to a raw material and subjecting it to ironing A manufacturing method called Ei method is known.
[0003]
In the production by this Ei method, a hot-extruded tube using an aluminum alloy such as 3003, 3004, 1050, 6063 or the like is used as a raw material, and after undergoing a cutting process step of cutting it to a predetermined length, this cutting step is performed. The surface of the pipe having a predetermined length obtained in this way is processed in a surface chamfering process for removing defects such as oxide films formed in the extrusion process and handling flaws. After this chamfering process, a process is performed in a squeezing process in which squeezing is performed. After that, the ironing process is performed in the ironing process. Thereafter, processing is performed in a both-end cutting process for cutting and removing uneven portions formed at both ends of the workpiece. Next, there is a cleaning process to remove the oil adhering in the ironing process, but in the ironing process, it is necessary to perform processing while preventing seizure of the mold and workpiece using a large amount of lubricating oil. In the process, a large amount of oil flows on the workpiece.
[0004]
[Problem to be Solved by the Invention]
The next step is to cut the non-uniform part at both ends with a double-sided machine and process it to a predetermined total length. At this time, it is necessary to fix the inside or outside of the workpiece. There are many cases in which fixing is difficult due to the adhered oil, or foreign matter mixed in the oil becomes a defect when the workpiece is indented on the workpiece during fixing and becomes a product. The object of the present invention is to solve the above drawbacks.
[0005]
[Means for Solving the Invention]
In order to achieve the above-mentioned object, the present inventors have found that the above-mentioned problems can be solved by carrying out washing before the both-end cutting step as a result of intensive studies.
In other words, it is clear that the above-mentioned difficulty of fixing is caused by the oil adhering to it, and indentation-like defects are generated at the time of fixing when the foreign matter in the oil performs the fixing operation. In some cases, an indentation is generated between the two and the other, and in some cases, the chips from both ends are attached to the chuck, and when the workpiece is fixed, the indentation is generated. In any case, it was found that the oil adhering to the workpiece was the main cause of the above problems.
[0006]
As a countermeasure against this, the cleaning process usually performed after the both-end cutting is performed before the both-end cutting process. By changing the process in this way, the oil adhering to the workpiece can be removed before cutting both ends, so that it is possible to prevent the occurrence of defects such as indentations due to the adhesion of oil.
Cleaning here refers to cleaning to remove high-viscosity oil used during ironing processing, and cleaning that combines immersion cleaning and steam cleaning multiple times using an organic solvent such as trichrene, trichloroethane, methylene chloride, Or it changes to an organic solvent and refers to what wash | cleans by rinsing several times by immersion or shower using pure water or a pure water after performing immersion cleaning using a water-system cleaning agent.
[0007]
【Example】
Investigate the rate of occurrence of indentation defects by producing 1,000 aluminum alloy tubes manufactured by Ei processing with an outer diameter of 30 mm, an inner diameter of 28.5 mm, and a total length of 253 mm. did.
The results are shown in the table below.
[0008]
[Table 1]

The flow of the process used for this test is as shown in FIG.
[0009]
【The invention's effect】
According to the present invention, it is possible to establish a manufacturing process with an extremely high yield in the method for manufacturing a substrate for an electrophotographic photosensitive member.

Claims (1)

In the method for producing a substrate for an electrophotographic photosensitive member, the method includes a step of performing ironing by applying lubricating oil to the material tube, and a step of cutting the raw tube after the ironing. A method for producing a substrate for an electrophotographic photoreceptor, comprising a step of performing and a step of cleaning the blank tube between the cutting processes.