JPH07303853A - Apparatus for preparing organic photosensitive membrane for electrophotography - Google Patents
Apparatus for preparing organic photosensitive membrane for electrophotographyInfo
- Publication number
- JPH07303853A JPH07303853A JP9828094A JP9828094A JPH07303853A JP H07303853 A JPH07303853 A JP H07303853A JP 9828094 A JP9828094 A JP 9828094A JP 9828094 A JP9828094 A JP 9828094A JP H07303853 A JPH07303853 A JP H07303853A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- tank
- cylinder
- application
- coating liquid
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電子写真用有機感光
体ドラムの感光層のディップによる成膜装置に関し、特
に塗布層に近い容積を持つ円筒状基体への感光層の形成
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film forming apparatus for dipping a photosensitive layer of an organic photosensitive drum for electrophotography, and more particularly to forming a photosensitive layer on a cylindrical substrate having a volume close to that of a coating layer.
【０００２】[0002]
【従来の技術】電子写真用有機感光体ドラムは、通常、
円筒状基体の表面に有機感光材料を含む塗布液を塗布し
て感光層を形成することにより製造される。塗布方法と
しては浸漬塗布方法，スプレー塗布方法，リングコート
法などがあるが，比較的均一に任意の膜厚の塗膜を得る
ことができ、しかも量産性にすぐれた浸漬塗布方法が広
く用いられている。2. Description of the Related Art Organic photoconductor drums for electrophotography are usually
It is manufactured by applying a coating solution containing an organic photosensitive material on the surface of a cylindrical substrate to form a photosensitive layer. Although there are dip coating method, spray coating method, ring coating method, etc. as the coating method, the dip coating method, which can obtain a coating film having an arbitrary film thickness relatively uniformly and has excellent mass productivity, is widely used. ing.
【０００３】この方法は，膜形成動作より塗布槽（塗液
面）固定で感光体を上下させる方法と、感光体固定で塗
布槽（塗液面）を上下させる方法の二つに分けることが
できる。これらの方法では、塗膜の均一性確保および膜
厚の制御の観点から塗液をオーバーフロー（循環）する
ことにより、常に塗布槽に対する液面の位置を一定化す
るとともに感光体塗工部での液状態を安定化して塗工す
るのが一般的である。This method can be divided into two methods, namely, a method of moving the photosensitive member up and down by fixing the coating tank (coating liquid surface) and a method of moving the coating tank (coating liquid surface) up and down by fixing the photosensitive member from the film forming operation. it can. In these methods, by overflowing (circulating) the coating liquid from the viewpoint of ensuring the uniformity of the coating film and controlling the film thickness, the position of the liquid surface with respect to the coating tank is always kept constant, and It is common to stabilize the liquid state before coating.
【０００４】図２は従来の塗布装置の断面図であり、塗
布方法としては、前記した感光体を上下することにより
塗布する方法であり、円筒状基体を塗布槽に浸漬し一定
の速度で引き上げることにより円筒状基体表面に膜厚均
一で均質な塗膜を形成するものである。この方法では、
チャック部３により円筒状基体４の端部を保持し塗布槽
１へ浸漬させるとき、円筒状基体４の内部に塗液が入ら
ないように該基体４を鉛直に浸漬させチャック部３と塗
液により円筒状基体４の内部が密閉状態になるようにす
る。このようにすると、円筒状基体４の容積に近い塗液
が塗布槽より排出されオーバーフロー配管７を通り塗液
タンク６へ戻る。このため円筒状基体を引き上げ塗布す
る際に塗布槽の液面を一定に保持するように引き上げ速
度に応じて循環ポンプ５を制御して塗液を塗布槽１へ供
給する。また、円筒状基体４を引き上げる際には、円筒
状基体４内部の圧縮されている空気が異常に急激に膨張
して塗布液を攪乱し塗布むらを発生させないように、円
筒状基体４内部の空気をチャック部３の図示しない排出
口より排出しながら行う。FIG. 2 is a sectional view of a conventional coating apparatus. The coating method is a method of coating by moving the above-mentioned photosensitive member up and down. The cylindrical substrate is dipped in a coating tank and pulled up at a constant speed. As a result, a uniform coating film having a uniform film thickness is formed on the surface of the cylindrical substrate. in this way,
When the end of the cylindrical substrate 4 is held by the chuck 3 and immersed in the coating tank 1, the substrate 4 is vertically immersed so that the coating liquid does not enter the inside of the cylindrical substrate 4 and the chuck 3 and the coating liquid. Thus, the inside of the cylindrical substrate 4 is sealed. By doing so, the coating liquid having a volume close to that of the cylindrical substrate 4 is discharged from the coating tank and returned to the coating liquid tank 6 through the overflow pipe 7. Therefore, when the cylindrical substrate is pulled up and applied, the circulation pump 5 is controlled according to the pulling speed so that the liquid level in the coating tank is kept constant, and the coating liquid is supplied to the coating tank 1. Further, when the cylindrical substrate 4 is pulled up, the compressed air inside the cylindrical substrate 4 does not abnormally and rapidly expand to disturb the coating liquid and cause uneven coating, so that the inside of the cylindrical substrate 4 is not disturbed. The air is discharged from a discharge port (not shown) of the chuck unit 3.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、塗布槽
の容積に近い容積を持つ感光体の塗工（大径，長軸ドラ
ムあるいは多数本のドラムの同時塗工）においては、感
光体浸漬時に多量の塗液が塗布槽より排出されるため、
感光体塗工時に多量の塗液を塗布槽内に戻さなければ塗
布槽に対する液面の位置が一定にならず、塗液の供給必
要量が循環ポンプの送液能力を越えると、塗液面の振動
を招いたり、塗布液のオーバーフローが行えず良好な膜
を形成できない。However, in coating a photoreceptor having a volume close to that of the coating tank (large diameter, long-axis drum or simultaneous coating of a large number of drums), a large amount is required when the photoreceptor is immersed. Since the coating liquid of is discharged from the coating tank,
If a large amount of coating liquid is not returned to the coating tank when coating the photoconductor, the position of the liquid surface with respect to the coating tank will not be constant, and if the required supply amount of coating liquid exceeds the pumping capacity of the circulation pump, Therefore, the coating solution cannot overflow and a good film cannot be formed.
【０００６】そのため、塗布槽の容積に近い円筒状基体
への感光層の塗布はオーバーフローでの塗工（循環ディ
ップ塗工）ではなく、循環を停めた状態での塗工を行う
方法が採られていた。しかしながら、この方法では前述
したように塗膜の均一性確保および膜厚の制御の点で、
最適な塗工方法とはいえない。本発明はこのような問題
を解決するためになされたもので、ディップ槽の容積に
近い容積を持つ感光体の塗工（大径，長軸ドラムの塗工
あるいは多数本のドラムの同時塗工）においても、安定
した塗工品質が得られる電子写真用有機感光体成膜装置
を提供するものである。Therefore, the method of applying the photosensitive layer to the cylindrical substrate having a volume close to that of the coating tank is not the overflow coating (circulation dip coating) but the circulation is stopped. Was there. However, in this method, as described above, in terms of ensuring the uniformity of the coating film and controlling the film thickness,
It is not the best coating method. The present invention has been made to solve such a problem, and is for coating a photoreceptor having a volume close to that of a dip tank (coating of a large-diameter, long-axis drum or simultaneous coating of multiple drums). (3) also provides an organic photoconductor film forming apparatus for electrophotography, which can obtain stable coating quality.
【０００７】[0007]
【課題を解決するための手段】上記の課題は、本発明に
よれば、塗布槽と、塗布液タンクと、塗布液を塗布液タ
ンクから循環ポンプにより塗布槽下部に送り込み，塗布
槽上縁部からオーバーフローさせて塗布液タンクに還流
させる塗布液循環機構とを備えてなる塗布装置におい
て、すくなくとも一面によって内部が塞がられている円
筒状筒が、前記塗布槽内に該筒の軸が鉛直になるよう
に、かつ前記円筒状基体を浸漬させたとき該円筒状基体
に内在するように形成された装置とすることにより解決
される。また、この円筒状空間の高さが前記オーバーフ
ロー面よりも高いことはさらに効果的である。SUMMARY OF THE INVENTION According to the present invention, the above-mentioned problem is solved by applying a coating tank, a coating solution tank, and feeding the coating solution from the coating solution tank to a lower part of the coating tank by a circulation pump to form an upper edge portion of the coating tank. In a coating apparatus comprising a coating solution circulating mechanism for causing the coating solution to flow back to the coating solution tank and flow back to the coating solution tank, a cylindrical tube whose inside is closed by at least one surface is such that the axis of the tube is vertically arranged in the coating tank. And a device formed so as to be present in the cylindrical substrate when the cylindrical substrate is immersed. Further, it is more effective that the height of the cylindrical space is higher than that of the overflow surface.
【０００８】[0008]
【作用】この発明は、塗布槽と、塗布液タンクと、塗布
液を塗布液タンクから循環ポンプにより塗布槽下部に送
り込み，塗布槽上縁部からオーバーフローさせて塗布液
タンクに還流させる塗布液循環機構とを備えてなる塗布
装置において、塗布槽内に円筒状の筒を設けた装置とし
て、円筒状基体をこの筒を覆うようにして、また基体内
部に塗布液が入らないようにチャック部に設けた排出口
より内部の空気の圧力を制御しながら浸漬させ、引き上
げ時もチャック部に設けた排出口により空気を制御しな
がら引き上げることにより塗布を行うことで、浸漬時の
オーバーフロー面より排出される液量をほぼ円筒状筒の
容積分低減させることができるため、引き上げ時は循環
ポンプの能力を越えることなく適量のオーバーフローを
行うことができる。According to the present invention, a coating tank, a coating solution tank, and a coating solution circulation system in which the coating solution is sent from the coating solution tank to the lower part of the coating tank by a circulation pump, overflows from the upper edge of the coating tank, and is returned to the coating solution tank. In a coating apparatus including a mechanism, a cylindrical tube is provided in a coating tank, the cylindrical base is covered with the cylinder, and a chuck is provided to prevent the coating liquid from entering the inside of the base. It is discharged from the overflow surface during immersion by dipping it while controlling the pressure of the internal air from the provided discharge port and applying it by pulling up while controlling the air with the discharge port provided in the chuck part when pulling up. Since the amount of liquid that can be used can be reduced by the volume of the cylindrical cylinder, an appropriate amount of overflow can be performed when pulling up without exceeding the capacity of the circulation pump.
【０００９】また、円筒状筒内部には液体が必要でない
ことから円筒状の筒の高さをオーバーフロー面より高く
すると塗液の量を低減できる。上記したように、塗布槽
の容積に近い容積を持つ感光体の塗工においても、安定
した塗工品質を実現することができる。Since no liquid is required inside the cylindrical tube, the amount of coating liquid can be reduced by making the height of the cylindrical tube higher than the overflow surface. As described above, stable coating quality can be realized even when coating a photoreceptor having a volume close to that of the coating tank.
【００１０】[0010]
実施例 図１は本発明の一実施例を示す、塗布装置の断面図であ
る。内径２５０mm深さが１４００mmの大きさの塗布槽１
内に内径１６０mmの円筒状筒２が設けられている。塗液
には顔料を溶剤に分散させた状態のものを用いた。円筒
状筒２上部はオーバーフロー面より５mm高い位置として
ある。円筒状基体４のチャック部３は、円筒状基体４の
上部まで塗布が行えるように円筒状にくり抜かれた形状
としている。Example FIG. 1 is a sectional view of a coating apparatus showing an example of the present invention. Coating tank 1 with an inner diameter of 250 mm and a depth of 1,400 mm
A cylindrical tube 2 having an inner diameter of 160 mm is provided therein. The coating liquid used was one in which the pigment was dispersed in a solvent. The upper part of the cylindrical tube 2 is located 5 mm higher than the overflow surface. The chuck portion 3 of the cylindrical substrate 4 has a hollowed-out shape so that the upper portion of the cylindrical substrate 4 can be coated.
【００１１】比較例１ 図２は従来の塗布装置の断面図であり、塗布槽内に円筒
状筒の存在しない通常の塗布槽を用いている。この装置
において塗液を循環させながら塗布を行う。 比較例２ 比較例１において循環を停めて塗布を行う。Comparative Example 1 FIG. 2 is a cross-sectional view of a conventional coating apparatus, which uses a normal coating tank having no cylindrical tube inside the coating tank. In this device, coating is performed while circulating the coating liquid. Comparative Example 2 In Comparative Example 1, the circulation is stopped and the coating is performed.
【００１２】これらの塗工装置を用いて、内径１８０mm
長さ１０００mmの円筒状基体の塗工を行った。循環量は
３０ｌ／ｍｉｎ，塗布スピードは３mm／ｓｅｃで行っ
た。但し比較例２は循環を行わない。これらの塗工時の
液面状態及び塗工基体の外観品質を比較した結果を表１
に示す。Using these coating devices, an inner diameter of 180 mm
A cylindrical substrate having a length of 1000 mm was coated. The circulation rate was 30 l / min, and the coating speed was 3 mm / sec. However, Comparative Example 2 does not perform circulation. The results of comparing the liquid surface state during coating and the appearance quality of the coated substrate are shown in Table 1.
Shown in.
【００１３】[0013]
【表１】 [Table 1]
【００１４】表１に見られるように、本発明の一実施例
では比較例と異なり、液面の状態が安定しており、良好
な外観品質の感光体を得ることができた。As can be seen from Table 1, in one example of the present invention, unlike the comparative example, the state of the liquid surface was stable, and a photoreceptor having a good appearance quality could be obtained.
【００１５】[0015]
【発明の効果】この発明によれば、円筒状基体に感光層
を形成する装置であって、塗布槽と、塗布液タンクと、
塗布液を塗布液タンクから循環ポンプにより塗布槽下部
に送り込み，塗布槽上縁部からオーバーフローさせて塗
布液タンクに還流させる塗布液循環機構とを備えてなる
塗布装置において、すくなくとも一面によって内部が塞
がられている円筒状筒が、前記塗布槽内に該筒の軸が鉛
直になるように、かつ前記円筒状基体を浸漬させたとき
該円筒状基体に内在するように形成された装置とするこ
とにより、塗布槽の容積に近い容積の円筒状基体に塗布
を行う場合においても円筒状基体の浸漬時の大量の排出
を抑えることができるため循環状態において液量の変動
を抑えることができ、良好な外観品質の電子写真用有機
感光体を得ることができる。According to the present invention, there is provided an apparatus for forming a photosensitive layer on a cylindrical substrate, which comprises a coating tank, a coating liquid tank,
In a coating device that includes a coating liquid circulating mechanism that feeds the coating liquid from the coating liquid tank to the lower portion of the coating tank by a circulation pump and causes the coating liquid to overflow from the upper edge of the coating tank and flow back to the coating liquid tank, at least one side closes An apparatus in which a cylindrical tube is formed such that the axis of the tube is vertical in the coating tank and is present in the cylindrical substrate when the cylindrical substrate is immersed. Thereby, even when performing coating on a cylindrical substrate having a volume close to the volume of the coating tank, it is possible to suppress a large amount of discharge when the cylindrical substrate is immersed, and thus it is possible to suppress fluctuations in the liquid amount in a circulating state, It is possible to obtain an organic photoconductor for electrophotography having a good appearance quality.
【図１】本発明に係わる電子写真用有機感光体成膜装置
の一実施例の断面図FIG. 1 is a cross-sectional view of an embodiment of an electrophotographic organic photoconductor film forming apparatus for electrophotography according to the present invention.
【図２】従来から行われている電子写真用有機感光体成
膜装置の断面図FIG. 2 is a sectional view of a conventional organic photoconductor film forming apparatus for electrophotography.
１ 塗布槽 ２ 円筒状筒 ３ チャック部 ４ 円筒状基体 ５ 循環ポンプ ６ 塗布液タンク ７ オーバーフロー配管 ８ 供給配管 1 Coating Tank 2 Cylindrical Cylinder 3 Chuck Part 4 Cylindrical Substrate 5 Circulation Pump 6 Coating Liquid Tank 7 Overflow Pipe 8 Supply Pipe
Claims (2)
塗布槽と、塗布液タンクと、塗布液を塗布液タンクから
循環ポンプにより塗布槽下部に送り込み，塗布槽上縁部
からオーバーフローさせて塗布液タンクに還流させる塗
布液循環機構とを備えてなる塗布装置において、すくな
くとも一面によって内部が塞がられている円筒状筒が前
記塗布槽内に該筒の軸が鉛直になるように、かつ前記円
筒状基体を浸漬させたとき該円筒状基体に内在するよう
に形成されていることを特徴とする電子写真用有機感光
体成膜装置。1. An apparatus for forming a film on a cylindrical substrate, comprising:
Coating comprising a coating tank, a coating solution tank, and a coating solution circulating mechanism for feeding the coating solution from the coating solution tank to the lower part of the coating tank by a circulation pump, causing the coating solution to overflow from the upper edge of the coating tank and flowing back to the coating solution tank. In the apparatus, a cylindrical cylinder whose inside is closed by at least one surface is present in the coating base such that the axis of the cylinder is vertical and when the cylindrical base is immersed. An organic photoconductor film forming apparatus for electrophotography, which is formed as described above.
装置において、円筒状筒の高さが塗布液のオーバーフロ
ー面より高いことを特徴とする電子写真用有機感光体成
膜装置。2. The organic photoconductor film forming apparatus for electrophotography according to claim 1, wherein the height of the cylindrical tube is higher than the overflow surface of the coating liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9828094A JPH07303853A (en) | 1994-05-12 | 1994-05-12 | Apparatus for preparing organic photosensitive membrane for electrophotography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9828094A JPH07303853A (en) | 1994-05-12 | 1994-05-12 | Apparatus for preparing organic photosensitive membrane for electrophotography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07303853A true JPH07303853A (en) | 1995-11-21 |
Family
ID=14215526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9828094A Pending JPH07303853A (en) | 1994-05-12 | 1994-05-12 | Apparatus for preparing organic photosensitive membrane for electrophotography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07303853A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101285373B1 (en) * | 2011-06-08 | 2013-07-11 | 주식회사 파캔오피씨 | Coating tank for a drum |
-
1994
- 1994-05-12 JP JP9828094A patent/JPH07303853A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101285373B1 (en) * | 2011-06-08 | 2013-07-11 | 주식회사 파캔오피씨 | Coating tank for a drum |
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