JP2784215B2 - How to remove the coating on the drum end - Google Patents
How to remove the coating on the drum endInfo
- Publication number
- JP2784215B2 JP2784215B2 JP20011589A JP20011589A JP2784215B2 JP 2784215 B2 JP2784215 B2 JP 2784215B2 JP 20011589 A JP20011589 A JP 20011589A JP 20011589 A JP20011589 A JP 20011589A JP 2784215 B2 JP2784215 B2 JP 2784215B2
- Authority
- JP
- Japan
- Prior art keywords
- drum
- coating film
- solvent
- coating
- remove
- 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.)
- Expired - Fee Related
Links
Landscapes
- Photoreceptors In Electrophotography (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、例えば、電子写真感光体ドラムを製造する
際に、円筒状のドラム外周面に感光性物質を含有する塗
布液を塗布することにより塗膜を形成し、その後に、ド
ラム端部の塗膜を除去する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to, for example, applying a coating solution containing a photosensitive substance to an outer peripheral surface of a cylindrical drum when manufacturing an electrophotographic photosensitive drum. To form a coating film, and thereafter remove the coating film at the end of the drum.
（従来の技術） 例えば、円筒状のドラムに感光性物質を含有する塗布
液を塗布して、電子写真感光体ドラムを製造する方法と
しては、ドラムを略鉛直に保持しつつ塗布液中に浸漬さ
せ、該ドラムを軸心方向に一定の速度で塗布液から退出
させることにより、ドラム外周面に均一な膜厚に塗膜を
形成する浸漬法が一般的である。(Prior Art) For example, as a method for manufacturing an electrophotographic photosensitive drum by applying a coating solution containing a photosensitive substance to a cylindrical drum, a method of immersing the drum in a coating solution while holding the drum substantially vertically is used. Then, the drum is withdrawn from the coating solution at a constant speed in the axial direction to form a coating film having a uniform film thickness on the outer peripheral surface of the drum.
電子写真感光体ドラムでは、ドラムの端部にフランジ
を嵌合させたり、導電処理するために、該ドラム端部に
は塗布液が塗布されていないことが好ましい。しかし、
上述の浸漬法では、ドラムが略鉛直に保持されて、塗布
液内から退入されるため、そのドラムの下端部には、必
ず塗布液が塗布されて塗膜が形成される。このため、浸
漬法により塗布液が塗布されたドラムは、端部に形成さ
れた塗膜を除去しなければならない。In the electrophotographic photosensitive drum, it is preferable that a coating liquid is not applied to the end of the drum in order to fit a flange to the end of the drum or perform a conductive process. But,
In the above-described immersion method, the drum is held substantially vertically and retreated from the inside of the coating liquid, so that the coating liquid is always applied to the lower end of the drum to form a coating film. For this reason, the drum on which the coating liquid has been applied by the dipping method must remove the coating film formed on the end.
ドラム端部に形成された塗膜を除去するために、塗膜
を溶解し得る溶剤内に、塗膜を除去すべきドラム端部を
浸漬させる方法がある。このような方法では、鉛直状に
保持されたドラムの下端部を溶剤内に浸漬させて、該ド
ラム下端部の塗膜を除去している。また、ドラム下端部
の塗膜を確実に除去するためには、塗膜を除去すべきド
ラム端部の長さに相当するストロークで、ドラムを繰り
返し昇降させて、ドラム端部の塗膜を除去すべき部分
が、溶剤に浸漬された状態と、該溶剤から退出した状態
とを交互に繰り返すことも行われている。In order to remove the coating film formed on the end of the drum, there is a method in which the end of the drum from which the coating is to be removed is immersed in a solvent capable of dissolving the coating. In such a method, the lower end of the drum held vertically is immersed in a solvent to remove the coating film on the lower end of the drum. Also, in order to reliably remove the coating film at the lower end of the drum, the drum is repeatedly moved up and down with a stroke corresponding to the length of the drum end at which the coating film is to be removed, and the coating film at the drum end is removed. In some cases, a part to be immersed in a solvent and a state in which the part is removed from the solvent are alternately repeated.
（発明が解決しようとする課題） このように、一定のストロークでドラムを昇降させつ
つ、ドラム端部を溶剤に浸漬させると、第２図に示すよ
うに、ドラム10下端部の塗膜11を除去すべき部分が確実
に除去される。しかし、このようにして、ドラム10端部
の塗膜11が除去されると、ドラム10における塗膜11を除
去すべき端部と、該端部以外の塗膜11を除去する必要の
ない部分との境界部において、塗膜11が溶解された状態
で留まり、その部分において、塗膜が厚く形成されるお
それがある。このように厚く塗膜が形成されると、次工
程の熱処理工程で、該塗膜部分に気泡が生じるおそれが
ある。(Problems to be Solved by the Invention) As described above, when the drum end is immersed in the solvent while raising and lowering the drum with a constant stroke, as shown in FIG. The part to be removed is reliably removed. However, when the coating film 11 at the end of the drum 10 is removed in this way, the end of the drum 10 from which the coating film 11 is to be removed, and the portion where the coating film 11 other than the end does not need to be removed. At the boundary with the coating film 11, the coating film 11 remains in a dissolved state, and at that portion, the coating film may be formed thick. When a thick coating film is formed as described above, bubbles may be generated in the coating film portion in the next heat treatment step.
本発明は上記従来の問題点を解決するものであり、そ
の目的は、ドラム端部外周面の塗膜を、確実に除去し得
て、しかも、塗膜を除去する必要のない部分と塗膜が除
去された部分との境界部分において、塗膜が厚くなるお
それがないドラム端部の塗膜除去方法を提供することに
ある。The present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to remove a coating film on an outer peripheral surface of a drum end portion without fail, and furthermore, a portion and a coating film which do not need to be removed. It is an object of the present invention to provide a method for removing a coating film at the end of a drum, in which there is no possibility that the coating film becomes thicker at a boundary portion with a portion from which the coating has been removed.
（問題点を解決するための手段） 本発明のドラム端部の塗膜除去方法は、周面に塗膜が
形成されたドラム端部を、該塗膜を溶解し得る溶剤内に
所定の長さだけ浸漬させて、軸心方向に所定のストロー
クで往復動させる塗膜除去工程と、該塗膜除去工程の後
に、該塗膜除去工程にて溶剤に浸漬された端部の長さよ
りも長く、該ドラム端部を該溶剤内に浸漬させる仕上げ
工程とを包含してなり、そのことにより上記目的が達成
される。(Means for Solving the Problems) According to the method for removing a coating film on a drum end of the present invention, a drum end having a coating film formed on a peripheral surface is placed in a solvent capable of dissolving the coating film for a predetermined length. After the coating removal step of immersing only in the axial direction and reciprocating with a predetermined stroke, after the coating removal step, the length of the end portion immersed in the solvent in the coating removal step is longer than the length of the end. And a finishing step of dipping the end of the drum in the solvent, thereby achieving the above object.
（実施例） 以下に本発明を、電子写真感光体ドラムを製造する場
合の実施例について説明する。(Example) Hereinafter, the present invention will be described with reference to an example in which an electrophotographic photosensitive drum is manufactured.
第１図は、本発明のドラム端部の塗膜除去方法の実施
状態の一例を示す断面図である。本発明方法は、例え
ば、浸漬法により感光性物質を含有する塗布液が塗布さ
れ、外周面全体に塗膜が形成されたドラム10の端部の塗
膜を除去するために実施される。本発明方法には、ドラ
ム10外周面の塗膜を溶解し得る溶剤21が収容された処理
槽20が使用される。FIG. 1 is a sectional view showing an example of an embodiment of a method for removing a coating film on a drum end according to the present invention. The method of the present invention is carried out, for example, in order to remove a coating film at the end of the drum 10 in which a coating solution containing a photosensitive substance is applied by an immersion method and a coating film is formed on the entire outer peripheral surface. In the method of the present invention, a treatment tank 20 containing a solvent 21 capable of dissolving the coating film on the outer peripheral surface of the drum 10 is used.
該処理槽20に収容される溶剤としては、ドラム10外周
面に形成された感光性物質を含有する塗膜を溶解し得る
ものであればよく、例えば、テトラヒドロフラン（TH
F）が使用される。The solvent contained in the processing tank 20 may be any solvent capable of dissolving a coating film containing a photosensitive substance formed on the outer peripheral surface of the drum 10, and for example, tetrahydrofuran (TH
F) is used.
本発明方法は、次のように実施される。例えば浸漬法
により、外周面に塗膜が形成されたドラム10を、略鉛直
に保持し、処理槽20に対して、ドラム10全体を相対的に
下降させ、該ドラム10の下端部を、溶剤21内へ浸漬させ
る。この場合、ドラム10は、塗膜を除去する必要がある
下端部の軸方向の所定の長さL1だけを溶剤21内に浸漬さ
せる。そして、このような状態で、ドラム10の下端面
が、溶剤21から退出するように、処理槽20に対して相対
的に上昇させる。このように、ドラム10の塗膜を除去す
べき下端部が、溶剤21内に浸漬されるとともに、溶剤21
から退出されるようなストロークL1で、該ドラム10を繰
り返し軸心方向に往復動させて昇降させる。このような
昇降を、数十回、繰り返すことにより、ドラム10下端部
における溶剤21内に浸漬された塗膜が、溶剤21に溶解さ
れて、除去される。The method of the present invention is performed as follows. For example, by a dipping method, the drum 10 having the coating film formed on the outer peripheral surface is held substantially vertically, the entire drum 10 is relatively lowered with respect to the processing tank 20, and the lower end of the drum 10 is coated with a solvent. Immerse in 21. In this case, the drum 10 immerses only a predetermined length L1 in the axial direction of the lower end portion where the coating film needs to be removed in the solvent 21. Then, in such a state, the lower end surface of the drum 10 is raised relatively to the processing tank 20 so as to withdraw from the solvent 21. Thus, the lower end of the drum 10 from which the coating film is to be removed is immersed in the solvent 21 and the solvent 21 is removed.
The drum 10 is reciprocated in the axial direction repeatedly to move up and down with a stroke L1 such that the drum 10 is withdrawn. By repeating such lifting and lowering several tens of times, the coating film immersed in the solvent 21 at the lower end of the drum 10 is dissolved in the solvent 21 and removed.
このような塗膜除去工程が終了すると、仕上げ工程が
実施され、該塗膜除去工程でのドラム10の下端部が溶剤
21内に浸漬された長さL1よりも、長く（L2）浸漬させ
る。このような状態で、ドラム10をストロークL2で繰り
返し軸心方向に往復動させて昇降させる。これにより、
ドラム10における塗膜が除去された下端部に隣接する塗
膜部分が、溶剤21に浸漬され、この部分の塗膜が、若干
溶剤に溶解された状態になり、その塗膜部分は、他の塗
膜部分と略等しい厚さになり、塗膜が厚くなるおそれが
ない。When such a coating film removing step is completed, a finishing step is performed, and the lower end of the drum 10 in the coating film removing step is coated with a solvent.
It is immersed longer (L2) than the length L1 immersed in 21. In such a state, the drum 10 is repeatedly moved back and forth in the axial direction by the stroke L2. This allows
The portion of the coating film adjacent to the lower end of the drum 10 from which the coating film has been removed is immersed in the solvent 21, and the coating film in this portion is slightly dissolved in the solvent, and the coating film portion is separated by another solvent. The thickness is substantially the same as that of the coating film portion, and there is no possibility that the coating film becomes thick.
該仕上げ工程においては、ドラム10における塗膜が除
去された部分に隣接する部分の塗膜が厚くならないよう
に、該塗膜部分を溶剤21に浸漬させればよく、必要に応
じて、溶剤21内への浸漬を複数回にわたって実施すれば
よい。In the finishing step, the coating film portion may be immersed in a solvent 21 so that the coating film on the portion of the drum 10 adjacent to the portion from which the coating film has been removed is not thickened. What is necessary is just to perform immersion in a inside several times.
（発明の効果） 本発明方法によれば、ドラム端部における塗膜が除去
された部分に隣接する塗膜部分が、たの塗膜部分と略同
一の厚さになり、その部分だけ厚くなるおそれがなく、
従って、良好な電子写真感光体ドラムを製造し得る。(Effects of the Invention) According to the method of the present invention, the portion of the coating film adjacent to the portion where the coating film has been removed at the end of the drum has substantially the same thickness as the other coating film portion, and only that portion becomes thicker. Without fear,
Therefore, a good electrophotographic photosensitive drum can be manufactured.
第１図は本発明方法の実施状態の一例を示す断面図、第
２図は従来の塗膜除去方法によるドラム端部の塗膜除去
状態を示すドラムの断面図である。 10……ドラム、11……塗膜、20……容器、21……溶剤。FIG. 1 is a cross-sectional view showing an example of an embodiment of the method of the present invention, and FIG. 2 is a cross-sectional view of a drum showing a state of removing a coating film at an end of the drum by a conventional coating film removing method. 10 ... drum, 11 ... coating film, 20 ... container, 21 ... solvent.
Claims (1)
塗膜を溶解し得る溶剤内に所定の長さだけ浸漬させて、
軸心方向に所定のストロークで往復動させる塗膜除去工
程と、 該塗膜除去工程の後に、該塗膜除去工程にて溶剤に浸漬
された端部の長さよりも長く、該ドラム端部を該溶剤内
に浸漬させる仕上げ工程と を包含するドラム端部の塗膜除去方法。1. A drum end having a coating film formed on a peripheral surface thereof is immersed in a solvent capable of dissolving the coating film for a predetermined length,
A coating film removing step of reciprocating at a predetermined stroke in the axial direction; A finishing step of immersing the drum in the solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20011589A JP2784215B2 (en) | 1989-07-31 | 1989-07-31 | How to remove the coating on the drum end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20011589A JP2784215B2 (en) | 1989-07-31 | 1989-07-31 | How to remove the coating on the drum end |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0363655A JPH0363655A (en) | 1991-03-19 |
| JP2784215B2 true JP2784215B2 (en) | 1998-08-06 |
Family
ID=16419078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20011589A Expired - Fee Related JP2784215B2 (en) | 1989-07-31 | 1989-07-31 | How to remove the coating on the drum end |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2784215B2 (en) |
-
1989
- 1989-07-31 JP JP20011589A patent/JP2784215B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0363655A (en) | 1991-03-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 11 Free format text: PAYMENT UNTIL: 20090522 |
|
| LAPS | Cancellation because of no payment of annual fees |