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Aluminum pipe having excellent surface quality, method and apparatus for manufacturing the aluminum pipe, and photosenstive drum base body

A manufacturing method and technology for aluminum tubes, which are applied in cleaning methods, chemical instruments and methods, preparation of detergent mixture compositions, etc., can solve problems such as low production efficiency

Inactive Publication Date: 2008-12-31
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the aluminum drawn tube manufactured as above, there are many very small and elongated rib-shaped surface defects (hereinafter referred to as "white roads") as shown in the optical microscope photo of Figure 14 along the drawing direction (Figure 14 , the white line extends obliquely upward from the center of the photo image)
In recent years, as photosensitive drums of electrophotographic devices such as copiers, printers, and facsimile machines, excellent image quality has been demanded, but aluminum tubes that have surface defects such as the above-mentioned white marks cannot fully meet the requirements.
In the aluminum drawn tube obtained by the above-mentioned conventional manufacturing method, the yield of good-quality products without surface defects such as white spots, that is, the material utilization rate is about 70%, so the production efficiency is low.

Method used

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  • Aluminum pipe having excellent surface quality, method and apparatus for manufacturing the aluminum pipe, and photosenstive drum base body
  • Aluminum pipe having excellent surface quality, method and apparatus for manufacturing the aluminum pipe, and photosenstive drum base body
  • Aluminum pipe having excellent surface quality, method and apparatus for manufacturing the aluminum pipe, and photosenstive drum base body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0138] Under the following extrusion conditions, for Mn: 1.12% by mass, Si: 0.11% by mass, Fe: 0.39% by mass, Cu: 0.16% by mass, Zn: 0.01% by mass, Mg: 0.02% by mass, other components are aluminum and The billet composed of unavoidable impurities was extruded to obtain an aluminum extruded billet tube (32 mm in outer diameter, 1.5 mm in wall thickness). The surface roughness Ry of the aluminum extruded pipe was 2.5 micrometers in the circumferential direction. Moreover, the average length of the grains on the surface of the extruded aluminum tube in the drawing direction is 200 microns.

[0139] (extrusion condition)

[0140] Extrusion temperature: 520°C

[0141] Extrusion speed: 0.5 m / min

[0142] Extrusion Die: Use Figure 1 and figure 2 The multi-hole split extrusion die is shown. The length L of the sizing belt portion of the die hole in the extrusion direction is 3 mm. The relationship between the centerline average roughness Ra(Y) in the circumferential direction o...

Embodiment 2～7

[0166] Except that the distance Q from the extrusion die discharge position M of the extruder 24 to the cutting position N of the cutting machine 25 and the length R of the extruded tube 4 obtained by cutting are set to the values ​​shown in Table 1, the same as Same as Example 1, an aluminum tube for a photosensitive drum was obtained.

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Abstract

In the manufacturing method of extruding an aluminum billet to obtain an aluminum extruded billet tube (4), and then drawing the extruded billet tube (4), at a distance of 10 from the discharge position (M) of the extrusion die Cutting the extruded aluminum extruded tube (4) at a position within 1 meter or less to obtain an aluminum extruded tube (4) with a length (R) less than or equal to 10 meters, and supplying the extruded tube (4) to the above-mentioned drawing process. Thereby, an aluminum pipe having excellent surface quality without surface defects such as white marks can be produced efficiently.

Description

[0001] This application claims the priority of Japanese Patent Application No. 2003-303334 filed on August 27, 2003, the disclosure content of which directly constitutes a part of the application of the present invention. technical field [0002] The present invention relates to an aluminum tube with excellent surface quality suitable for photosensitive drums of electrophotographic devices such as copiers, printers, facsimile machines, a method for producing the same, and a photosensitive drum substrate with excellent surface quality. [0003] Also in this specification, use of the term "aluminum" is intended to include aluminum and aluminum alloys. Background technique [0004] Aluminum tubes used as photosensitive drums of electrophotographic devices such as copiers, printers, and facsimile machines are expected to have a surface state that is relatively close to a mirror surface in nature. Conventionally, mirror finishing has been performed by cutting aluminum tubes, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C1/22B21D3/02
CPCB21C1/24B21C3/04B21C3/16B21C23/085B21C25/02B21D3/04C11D7/24G03G2215/00957C11D2111/20C11D2111/46
Inventor 岩永晃治后长毅佐川邦广百百阳一
Owner RESONAC HOLDINGS CORPORATION
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