JPH06118679A - Cylindrical base body for electrophotographic sensitive body and its production - Google Patents
Cylindrical base body for electrophotographic sensitive body and its productionInfo
- Publication number
- JPH06118679A JPH06118679A JP4201652A JP20165292A JPH06118679A JP H06118679 A JPH06118679 A JP H06118679A JP 4201652 A JP4201652 A JP 4201652A JP 20165292 A JP20165292 A JP 20165292A JP H06118679 A JPH06118679 A JP H06118679A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- mandrel
- cutting
- cylindrical substrate
- executed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Photoreceptors In Electrophotography (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、電子写真感光体用円筒
基体及びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical substrate for an electrophotographic photoreceptor and a method for producing the same.
【0002】[0002]
【発明の背景】アルミニウム又はアルミニウム合金(以
下、アルミニウム)製の電子写真感光体用円筒基体の製
造方法として、従来では、ホロー・ダイと呼ばれるフロ
ントダイとバックダイとを組み合わせたダイを用いて押
出加工したポートホール押出管に対して引き抜き加工を
施し、この後所定の長さに切断し、その後に外表面をダ
イヤモンドバイト等の切削工具を用いて切削仕上げする
技術が提案されている。BACKGROUND OF THE INVENTION As a method for manufacturing a cylindrical substrate for an electrophotographic photosensitive member made of aluminum or an aluminum alloy (hereinafter, aluminum), extrusion is conventionally performed using a die called a hollow die which is a combination of a front die and a back die. A technique has been proposed in which the processed porthole extruded pipe is subjected to a drawing process, then cut to a predetermined length, and then the outer surface is cut and finished using a cutting tool such as a diamond bite.
【0003】しかしながら、このようにして得られた電
子写真感光体用円筒基体(DT管)はコストが高く付い
ていることから、ポートホール押出管の表面をしごき加
工により仕上げた電子写真感光体用円筒基体(EI管)
や、冷間引抜き加工することにより得た電子写真感光体
用円筒基体(ED管)が提案されている。ところで、こ
れらEI管やED管の表面に感光層を設けて電子写真感
光体を作製し、これを用いてプリントされた複写画像に
は縦筋状の模様が認められ、良好なプリントが得られな
いことが指摘されている。However, since the cylindrical substrate (DT tube) for an electrophotographic photosensitive member thus obtained has a high cost, it is for an electrophotographic photosensitive member in which the surface of a porthole extruded tube is finished by ironing. Cylindrical substrate (EI tube)
Alternatively, a cylindrical substrate (ED tube) for an electrophotographic photoreceptor obtained by cold drawing has been proposed. By the way, a photosensitive layer is provided on the surface of the EI tube or the ED tube to manufacture an electrophotographic photosensitive member, and a vertical streak-like pattern is recognized in a copied image printed using the electrophotographic photosensitive member, and a good print is obtained. It has been pointed out that there is no.
【0004】この為、かかる問題点を解決する為に、E
I管やED管の表面に下引き層を設け、この下引き層上
に感光層を設けた電子写真感光体が提案されている。し
かしながら、このような手段では、コスト低減の目的が
大幅に失われてしまい、満足出来るものではない。Therefore, in order to solve such a problem, E
An electrophotographic photoreceptor has been proposed in which an undercoat layer is provided on the surface of an I tube or an ED tube, and a photosensitive layer is provided on the undercoat layer. However, such means is not satisfactory because the purpose of cost reduction is largely lost.
【0005】[0005]
【発明の開示】前記の問題点に対応すべく研究を鋭意行
った結果、縦筋模様はウエルドラインと呼ばれるアルミ
ニウムの溶着部で起きていることが突き止められるに至
った。すなわち、ホロー・ダイを用いてパイプを押し出
し加工する場合、アルミニウムは先ずポートにより分断
され、ブリッジの下で再び溶着されて中空状のパイプと
なる。従って、ホロー・ダイを用いて作製されるパイプ
には数本のウエルドラインと呼ばれるアルミニウムの溶
着部が長手方向に形成されるものとなる。ところで、こ
のウエルドライン近傍では結晶組織の変化が起きていた
り、酸化物などが巻き込まれており、この為にウエルド
ライン近傍では基体の電気的な物性が変化しており、こ
れによって複写画像には縦筋模様の欠陥が起きるに至っ
たことが突き止められた。DISCLOSURE OF THE INVENTION As a result of intensive research to address the above-mentioned problems, it has been found that the vertical streak pattern is occurring in the welded part of aluminum called weld line. That is, when a pipe is extruded using a hollow die, the aluminum is first divided by the port and re-welded under the bridge into a hollow pipe. Therefore, in a pipe manufactured by using a hollow die, several welded parts of aluminum called weld lines are formed in the longitudinal direction. By the way, in the vicinity of the weld line, a change in the crystal structure occurs, or oxides are involved, so that the electrical properties of the substrate are changed in the vicinity of the weld line. It was discovered that a vertical streak defect had occurred.
【0006】そして、前記のような画像欠陥を解決する
為には、ウエルドラインが形成されない手段でパイプを
製作すれば良いであろうとの知見を得るに至った。すな
わち、マンドレル押出加工によりパイプを作製すれば前
記のような画像欠陥の発生を解決できるであろうとの知
見を得るに至った。しかしながら、単に、マンドレル押
出加工により得たパイプ(マンドレル管)のみでは満足
できるものでなかった。In order to solve the above-mentioned image defects, it has been found that a pipe should be manufactured by a means in which no weld line is formed. That is, we have come to the knowledge that the production of image defects as described above can be solved by producing a pipe by mandrel extrusion. However, the pipe obtained by the mandrel extrusion process (mandrel pipe) is not satisfactory.
【0007】すなわち、マンドレル管は、ポートホール
押出管に比べてウエルドラインがないものの、偏肉が
0.1〜0.3mm程度も有り、これにしごき加工ある
いは引き抜き加工を施してしまうと、偏肉の為に加工し
た管の曲がりが大きく、電子写真感光体用円筒基体とし
ては到底使い物にならなかった。この為、ローラー矯正
などの矯正工程を付加する必要が有り、コストが高く付
いてしまう。特に、通常程度の矯正を施しても十分なも
のでなく、この為に電子写真感光体用円筒基体として使
い物になる程度まで十二分に矯正しようとすると、コス
トが非常に高く付いてしまう。That is, although the mandrel tube has no weld line as compared with the porthole extruded tube, it has an uneven thickness of about 0.1 to 0.3 mm, and if it is ironed or drawn, Since the tube processed due to the flesh had a large bend, it could not be used at all as a cylindrical substrate for an electrophotographic photoreceptor. Therefore, it is necessary to add a straightening process such as roller straightening, which results in high cost. In particular, even if a normal degree of correction is applied, it is not sufficient, and therefore, if the correction is more than sufficient so that it can be used as a cylindrical substrate for an electrophotographic photoreceptor, the cost will be very high.
【0008】このような知見を基にして本発明が達成さ
れたものであり、本発明の目的は、プリントに縦筋状の
模様が発生することがない電子写真感光体用円筒基体を
低コストで得る技術を提供することである。この本発明
の目的は、マンドレル押出加工により得られた所定長さ
のパイプの表面層を除去し、しごき加工が施されてなる
ことを特徴とする電子写真感光体用円筒基体によって達
成される。The present invention has been achieved on the basis of such knowledge, and an object of the present invention is to provide a cylindrical substrate for an electrophotographic photoreceptor at a low cost, in which vertical stripe-like patterns do not occur in prints. It is to provide the technology obtained in. The object of the present invention is achieved by a cylindrical substrate for an electrophotographic photosensitive member, characterized in that a surface layer of a pipe having a predetermined length obtained by mandrel extrusion is removed and ironing is performed.
【0009】又、マンドレル押出加工によりパイプを製
作するマンドレル押出加工工程と、マンドレル押出加工
工程により得られたパイプを所定の長さに切断する切断
工程と、切断工程で得られた所定長さのパイプの表面層
を除去する除去工程と、除去工程で得られた表面層が除
去されたパイプをしごき加工するしごき加工工程とを具
備することを特徴とする電子写真感光体用円筒基体の製
造方法によって達成される。Further, a mandrel extrusion process for producing a pipe by mandrel extrusion, a cutting process for cutting the pipe obtained by the mandrel extrusion process to a predetermined length, and a predetermined length obtained by the cutting process. A method for producing a cylindrical substrate for an electrophotographic photosensitive member, comprising: a removing step of removing a surface layer of a pipe; and an ironing step of ironing the pipe having the surface layer obtained in the removing step. Achieved by
【0010】尚、上記の発明において、パイプ表面層の
除去深さは約0.1mm以上、約0.3mm以下である
ことが好ましい。そして、最大限でも約0.5mm程度
も除去すれば十分である。この表面層除去手段として
は、例えばダイヤモンドバイト等による切削加工、エッ
チング加工、ブラスト加工、研磨加工などの手段を適宜
用いることが出来るが、均一な切削性やコスト面から切
削手段によるものが好ましい。In the above invention, the removal depth of the pipe surface layer is preferably about 0.1 mm or more and about 0.3 mm or less. It is sufficient to remove about 0.5 mm at the maximum. As the surface layer removing means, for example, a cutting tool such as a diamond bite, an etching process, a blasting process, a polishing process or the like can be appropriately used, but a cutting device is preferable from the viewpoint of uniform cutting property and cost.
【0011】以下、本発明について詳しく説明する。先
ず、熱間押出加工によりマンドレル管を得る。そして、
このマンドレル管をEI加工に必要な長さ(例えば、8
0〜120mm程度)に予め切断する。このことによ
り、この後に行われる外表面層切削コストが低廉なもの
となる。すなわち、押出加工し、切断されたパイプは、
しごき加工により長さが3倍程度伸ばされる。従って、
このしごき加工前に外表面層切削処理を行うと、加工後
に行うのに比べて処理面積が1/3程度に出来、低コス
トで処理できるようになる。The present invention will be described in detail below. First, a mandrel tube is obtained by hot extrusion. And
The length of this mandrel tube required for EI processing (for example, 8
It is cut in advance to about 0 to 120 mm). As a result, the cost of cutting the outer surface layer performed thereafter becomes low. That is, the extruded and cut pipe is
The length is extended about 3 times by ironing. Therefore,
If the outer surface layer cutting process is performed before the ironing process, the processing area can be reduced to about 1/3 of that performed after the ironing process, and the process can be performed at low cost.
【0012】次に、マンドレル管の外表面層の切削が行
われる。この外表面層の切削は、例えばダイヤモンドバ
イト等の切削工具を用いて行うことが出来る。切削深さ
は、偏肉量に応じて約0.1〜0.3mm程度、偏肉量
が大きい場合には0.3〜0.5mm程度行う。そし
て、上記した適宜な手段によってマンドレル管の偏肉が
調整された後、又、外表面における表面欠陥が除去され
た後、しごき加工によって電子写真感光体用円筒基体が
得られる。Next, the outer surface layer of the mandrel tube is cut. This outer surface layer can be cut using a cutting tool such as a diamond cutting tool. The cutting depth is about 0.1 to 0.3 mm depending on the amount of uneven thickness, and about 0.3 to 0.5 mm when the amount of uneven thickness is large. Then, after the uneven thickness of the mandrel tube is adjusted by the appropriate means described above and after the surface defects on the outer surface are removed, the cylindrical substrate for an electrophotographic photoreceptor is obtained by ironing.
【0013】このようにして製造された電子写真感光体
用円筒基体は、その表面に下引き層を設けることなく感
光層を設けただけのものでも、プリントには縦筋状の模
様が発生することがなく、良好なプリントが得られ、そ
してその製造コストは低廉なものである。尚、電子写真
感光体用円筒基体に用いられるアルミニウム材料とし
て、格別なる制約はないが、1100,3003,60
63合金などが好ましい例として挙げられる。The thus produced cylindrical substrate for an electrophotographic photosensitive member has a vertical streak pattern on a print even if a photosensitive layer is provided on the surface thereof without providing an undercoat layer. , A good print is obtained, and its manufacturing cost is low. There is no particular restriction on the aluminum material used for the cylindrical substrate for the electrophotographic photoreceptor, but 1100, 3003, 60
63 alloy etc. are mentioned as a preferable example.
【0014】以下、実施例により具体的に説明する。A specific description will be given below with reference to examples.
【0015】[0015]
〔実施例1〕アルミニウム(JIS 3003)材に対
してマンドレル押出加工を施して外径32mmφで肉厚
6mmのマンドレル管を作製し、これを長さ100mm
にカットした。[Example 1] A mandrel extrusion process was performed on an aluminum (JIS 3003) material to produce a mandrel tube having an outer diameter of 32 mmφ and a wall thickness of 6 mm.
Cut into
【0016】そして、ダイヤモンドバイトを用いてマン
ドレル管の外表面層を表面から0.2mmの深さにわた
って切削し、この後しごき加工を施して外径30mm
φ、肉厚1mm、長さ260mmの電子写真感光体用円
筒基体を得た。 〔比較例1〕アルミニウム(JIS 3003)材に対
してホロー・ダイを用いての加工により外径32mmφ
で肉厚6mmのポートホール押出管を作製し、これを長
さ100mmにカットした。Then, the outer surface layer of the mandrel tube is cut with a diamond bite to a depth of 0.2 mm from the surface, and thereafter ironed to give an outer diameter of 30 mm.
A cylindrical substrate for an electrophotographic photosensitive member having φ, a wall thickness of 1 mm and a length of 260 mm was obtained. [Comparative Example 1] Aluminum (JIS 3003) material is machined using a hollow die to have an outer diameter of 32 mmφ.
Then, a porthole extruded tube having a wall thickness of 6 mm was produced and cut into a length of 100 mm.
【0017】そして、ダイヤモンドバイトを用いてポー
トホール押出管の外表面層を表面から0.2mmの深さ
にわたって切削し、この後しごき加工を施して外径30
mmφ、肉厚1mm、長さ260mmの電子写真感光体
用円筒基体を得た。 〔比較例2〕アルミニウム(JIS 3003)材に対
してホロー・ダイを用いての加工により外径32mmφ
で肉厚6mmのポートホール押出管を作製し、これを長
さ300mmにカットした。Then, the outer surface layer of the porthole extruded pipe is cut with a diamond bite to a depth of 0.2 mm from the surface, and thereafter ironed to give an outer diameter of 30.
A cylindrical substrate for an electrophotographic photosensitive member having an mmφ, a wall thickness of 1 mm and a length of 260 mm was obtained. [Comparative Example 2] Aluminum (JIS 3003) material was machined using a hollow die to give an outer diameter of 32 mmφ.
A port-hole extruded tube having a wall thickness of 6 mm was prepared by cutting with a length of 300 mm.
【0018】そして、冷間引き抜き加工を施した後、長
さ260mmに切断し、外径30mmφ、肉厚1mm、
長さ260mmの電子写真感光体用円筒基体を得た。 〔比較例3〕アルミニウム(JIS 3003)材に対
してマンドレル押し出し加工を施して外径32mmφで
肉厚6mmのマンドレル管を作製し、これを長さ100
mmにカットした。After cold drawing, it is cut into a length of 260 mm, an outer diameter of 30 mmφ, a wall thickness of 1 mm,
A 260 mm long cylindrical substrate for an electrophotographic photosensitive member was obtained. [Comparative Example 3] An aluminum (JIS 3003) material was extruded by a mandrel to produce a mandrel tube having an outer diameter of 32 mmφ and a wall thickness of 6 mm.
It was cut into mm.
【0019】そして、冷間引き抜き加工を施した後、長
さ260mmに切断し、外径30mmφ、肉厚1mm、
長さ260mmの電子写真感光体用円筒基体を得た。 〔特性〕上記各例で得た電子写真感光体用円筒基体に感
光剤を塗布して電子写真感光体を作製し、そしてこれが
組み込まれた装置により複写された画像の特性を調べた
ので、その結果を表1に示す。又、コロフレについても
調べたので、併せて表1に示す。After cold-drawing, it is cut into a length of 260 mm, an outer diameter of 30 mmφ, a wall thickness of 1 mm,
A 260 mm long cylindrical substrate for an electrophotographic photosensitive member was obtained. [Characteristics] A cylindrical substrate for an electrophotographic photoreceptor obtained in each of the above examples was coated with a photosensitizer to prepare an electrophotographic photoreceptor, and the characteristics of an image copied by an apparatus incorporating the same were examined. The results are shown in Table 1. In addition, we have also examined the corofle, which is also shown in Table 1.
【0020】 画像特性における◎印は筋状の画像欠陥が認められず ×印は筋状の画像欠陥が認められた コロフレにおける◎印は30μm未満 ×印は60μm以上[0020] In the image characteristics, the ⊚ mark does not show streak-shaped image defects, and the X mark shows streak-shaped image defects. ◎ mark in Korofure is less than 30 μm × mark is 60 μm or more
【0021】[0021]
【効果】本発明によれば、縦筋状の模様が発生するとい
ったことがない優れた画質を提供できる電子写真感光体
用円筒基体が低コストで得られる。According to the present invention, a cylindrical substrate for an electrophotographic photosensitive member can be obtained at a low cost, which can provide excellent image quality without the occurrence of vertical stripe patterns.
Claims (4)
長さのパイプの表面層を除去し、しごき加工が施されて
なることを特徴とする電子写真感光体用円筒基体。1. A cylindrical substrate for an electrophotographic photosensitive member, characterized in that the surface layer of a pipe having a predetermined length obtained by mandrel extrusion is removed and ironed.
以上であることを特徴とする請求項1の電子写真感光体
用円筒基体。2. The removal depth of the pipe surface layer is about 0.1 mm.
The above is the cylindrical substrate for an electrophotographic photosensitive member according to claim 1.
するマンドレル押出加工工程と、マンドレル押出加工工
程により得られたパイプを所定の長さに切断する切断工
程と、切断工程で得られた所定長さのパイプの表面層を
除去する除去工程と、除去工程で得られた表面層が除去
されたパイプをしごき加工するしごき加工工程とを具備
することを特徴とする電子写真感光体用円筒基体の製造
方法。3. A mandrel extrusion process for producing a pipe by mandrel extrusion, a cutting process for cutting the pipe obtained by the mandrel extrusion process into a predetermined length, and a predetermined length obtained in the cutting process. A method for producing a cylindrical substrate for an electrophotographic photosensitive member, comprising: a removing step of removing a surface layer of a pipe; and an ironing step of ironing the pipe having the surface layer obtained in the removing step. .
上であることを特徴とする請求項3の電子写真感光体用
円筒基体の製造方法。4. The method for manufacturing a cylindrical substrate for an electrophotographic photosensitive member according to claim 3, wherein the removal depth in the removing step is about 0.1 mm or more.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4201652A JPH06118679A (en) | 1992-07-29 | 1992-07-29 | Cylindrical base body for electrophotographic sensitive body and its production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4201652A JPH06118679A (en) | 1992-07-29 | 1992-07-29 | Cylindrical base body for electrophotographic sensitive body and its production |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06118679A true JPH06118679A (en) | 1994-04-28 |
Family
ID=16444647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4201652A Pending JPH06118679A (en) | 1992-07-29 | 1992-07-29 | Cylindrical base body for electrophotographic sensitive body and its production |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06118679A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH07319191A (en) * | 1994-05-19 | 1995-12-08 | Showa Alum Corp | Aluminum tube for photoreceptor base and its production |
US5955231A (en) * | 1997-12-15 | 1999-09-21 | Konica Corporation | Electrophotographic apparatus and electrophotographic photoreceptor employed by the same |
JP2008186028A (en) * | 2008-04-09 | 2008-08-14 | Mitsubishi Chemicals Corp | Method for manufacturing substrate for electrophotographic photoreceptor, the electrophotographic photoreceptor and image forming apparatus |
JP2012013918A (en) * | 2010-06-30 | 2012-01-19 | Ricoh Co Ltd | Electrophotographic photoreceptor and method of manufacturing the same |
JP2012013929A (en) * | 2010-06-30 | 2012-01-19 | Ricoh Co Ltd | Electrophotographic photoreceptor and manufacturing method thereof |
US9031463B2 (en) | 2010-06-30 | 2015-05-12 | Ricoh Company, Ltd. | Electrophotographic photoconductor, image forming method, image forming apparatus and process cartridge |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07319191A (en) * | 1994-05-19 | 1995-12-08 | Showa Alum Corp | Aluminum tube for photoreceptor base and its production |
US5955231A (en) * | 1997-12-15 | 1999-09-21 | Konica Corporation | Electrophotographic apparatus and electrophotographic photoreceptor employed by the same |
JP2008186028A (en) * | 2008-04-09 | 2008-08-14 | Mitsubishi Chemicals Corp | Method for manufacturing substrate for electrophotographic photoreceptor, the electrophotographic photoreceptor and image forming apparatus |
JP2012013918A (en) * | 2010-06-30 | 2012-01-19 | Ricoh Co Ltd | Electrophotographic photoreceptor and method of manufacturing the same |
JP2012013929A (en) * | 2010-06-30 | 2012-01-19 | Ricoh Co Ltd | Electrophotographic photoreceptor and manufacturing method thereof |
US9031463B2 (en) | 2010-06-30 | 2015-05-12 | Ricoh Company, Ltd. | Electrophotographic photoconductor, image forming method, image forming apparatus and process cartridge |
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