JPS6320067A - Device for coating drum - Google Patents
Device for coating drumInfo
- Publication number
- JPS6320067A JPS6320067A JP16635786A JP16635786A JPS6320067A JP S6320067 A JPS6320067 A JP S6320067A JP 16635786 A JP16635786 A JP 16635786A JP 16635786 A JP16635786 A JP 16635786A JP S6320067 A JPS6320067 A JP S6320067A
- Authority
- JP
- Japan
- Prior art keywords
- drum
- coating
- coating liquid
- lid body
- space
- 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
- 239000011248 coating agent Substances 0.000 title claims abstract description 84
- 238000000576 coating method Methods 0.000 title claims abstract description 84
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 55
- 239000002904 solvent Substances 0.000 abstract description 19
- 239000004794 expanded polystyrene Substances 0.000 abstract 1
- 239000003562 lightweight material Substances 0.000 abstract 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 108091008695 photoreceptors Proteins 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000007654 immersion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/05—Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
- G03G5/0525—Coating methods
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
- Coating Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は２例えば電子写真複写機に使用される感光体ド
ラムの製造に用いられ、ドラム外周面に塗布液を均一な
膜厚にコーティングするドラム塗布装置に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention is used in the production of photosensitive drums used in, for example, electrophotographic copying machines, and coats the outer peripheral surface of the drum with a coating liquid to a uniform thickness. The present invention relates to a drum coating device.
（従来の技術）
例えば、電子写真複写機に用いられる感光体ドラムは、
アルミニウム等の導電性材料を用いたドラム外周面に感
光性物質を塗布して形成される。(Prior art) For example, a photosensitive drum used in an electrophotographic copying machine is
It is formed by applying a photosensitive substance to the outer peripheral surface of a drum made of a conductive material such as aluminum.
このような感光体ドラムでは、感光性物質を均一な膜厚
に塗布することが重要である。電子写真用の感光体ドラ
ムの製造方法としては、感光性物質の塗布液中にドラム
を浸漬し、該ドラムをその軸方向に塗布液から引き上げ
て、ドラム外周面に塗布液を塗布する。いわゆる浸漬法
が一般的である。In such photosensitive drums, it is important to apply the photosensitive material to a uniform thickness. As a method of manufacturing a photosensitive drum for electrophotography, a drum is immersed in a coating liquid of a photosensitive substance, the drum is pulled up from the coating liquid in the axial direction, and the coating liquid is applied to the outer peripheral surface of the drum. The so-called immersion method is common.
感光体ドラムの製造に用いられる塗布液には５溶剤とし
て１例えば、テトラヒドロフラン等の揮発性の有機溶剤
が使用されており、溶剤が塗布液面から耐えず蒸発する
。従って該浸漬法により感光体ドラムを製造する場合に
は、塗布液を収容するタンク内は常に、溶剤の蒸気で充
満している。塗布液から引き上げられるドラムは、この
溶剤蒸気層を通って、タンク外へ排出される。他方、ド
ラムを塗布液から引き上げると、塗布液から排出される
ドラム体積に対応して、塗布液面が下降する。A volatile organic solvent such as tetrahydrofuran, for example, is used as a solvent in the coating liquid used for manufacturing the photosensitive drum, and the solvent does not survive and evaporates from the surface of the coating liquid. Therefore, when manufacturing a photoreceptor drum by the immersion method, the tank containing the coating liquid is always filled with solvent vapor. The drum that is lifted out of the coating liquid passes through this solvent vapor layer and is discharged out of the tank. On the other hand, when the drum is lifted from the coating liquid, the level of the coating liquid decreases in response to the volume of the drum that is discharged from the coating liquid.
このため、塗布液面より上方のタンク内の空間の体積は
順次減少し、該空間の溶剤蒸気濃度は、塗布１夜から引
き上げられるドラムの体積に応じてＩＱｉ次、減少する
。従って、ドラムを塗布液から軸方向へ引き上げると、
最初に塗布液から排出されるドラムの上部は、塗布液面
上の狭い空間内の高蒸気濃度の雰囲気内にさらされるが
、最後に塗布液から排出されるドラム下部は、塗布液面
上の広い空間内の低蒸気濃度の雰囲気内にさらされる。Therefore, the volume of the space in the tank above the coating liquid level decreases sequentially, and the solvent vapor concentration in this space decreases by IQi according to the volume of the drum that is lifted from the first night of coating. Therefore, when the drum is pulled axially out of the coating solution,
The upper part of the drum, which is discharged from the coating liquid first, is exposed to an atmosphere of high vapor concentration in a narrow space above the coating liquid level, while the lower part of the drum, which is discharged from the coating liquid last, is exposed to an atmosphere of high vapor concentration above the coating liquid level. Exposure to low vapor concentration atmospheres in large spaces.
このため、ドラムの軸方向位置により、ドラム外周面に
塗布された塗布液の乾燥速度が異なり、ドラム外周面に
塗布液を均一な膜厚に塗布されない。For this reason, the drying speed of the coating liquid applied to the outer peripheral surface of the drum varies depending on the axial position of the drum, and the coating liquid is not applied to the outer peripheral surface of the drum to a uniform film thickness.
感光層が均一に塗布されていない感光体ドラムは。A photoreceptor drum whose photoreceptor layer is not evenly coated.
帯電極性が不均一になり１画像むらが発生する。The charging polarity becomes non-uniform and unevenness in one image occurs.
ピンホールによる白抜けやトナー付着による地肌汚れな
ども生じ、結局、鮮明な電子写真を供給し得ない。White spots due to pinholes and background stains due to toner adhesion also occur, making it impossible to provide clear electrophotographs.
（発明が解決しようとする問題点） 本発明は上記従来の問題を解決するものであり。(Problem that the invention attempts to solve) The present invention solves the above-mentioned conventional problems.
その目的は、塗布液からドラムを引き上げるに際し、塗
布液の上方の溶剤蒸気の影響によりドラム外周面にコー
ティングされる塗布液の膜厚が不均一になるおそれのな
いドラム塗布装置を提供することにある。The purpose is to provide a drum coating device in which there is no possibility that the film thickness of the coating liquid coated on the outer peripheral surface of the drum becomes uneven due to the influence of solvent vapor above the coating liquid when the drum is lifted from the coating liquid. be.
（問題点を解決するための手段）
本発明は、塗布液にドラムを浸漬したのち塗布液からド
ラムを引き上げ、該塗布液にてドラム外周面を所定の膜
厚にコーティングするドラム塗布装置であり、塗布液を
収容するタンクと、ドラムが貫通し得る貫通孔が形成さ
れており、塗布液の上方に所定の空間を形成して該塗布
液面の昇降に伴って昇降する蓋体と、を具備し、そのこ
とにより上記目的が達成される。(Means for Solving the Problems) The present invention is a drum coating device that immerses a drum in a coating solution, then lifts the drum from the coating solution, and coats the outer peripheral surface of the drum with the coating solution to a predetermined film thickness. , a tank for accommodating the coating liquid, and a lid body formed with a through hole through which the drum can pass, forming a predetermined space above the coating liquid, and moving up and down as the level of the coating liquid rises and falls. The above objective is achieved.
（実施例） 以下に本発明を、実施例について説明する。(Example) The present invention will be described below with reference to Examples.
本発明のドラム塗布装置は、第１図および第２図に示す
ように、塗布液１１が収容されたタンク１０と、塗布液
１１上に浮かべられた蓋体２０とを有する。As shown in FIGS. 1 and 2, the drum coating device of the present invention includes a tank 10 containing a coating liquid 11 and a lid 20 floating on the coating liquid 11.
タンク１０は２例えば円筒状をしている。該タンク１０
内に収容される塗布液１１としては９例えば電子写真用
感光体に使用される感光液が用いられる。The tank 10 has a cylindrical shape, for example. The tank 10
As the coating liquid 11 contained therein, for example, a photosensitive liquid used for an electrophotographic photoreceptor is used.
この感光液は、光導電性顔料、樹脂および溶剤などから
なる。溶剤としては１例えばテトラヒドロフラン、トル
エンなどの有機溶剤が用いられる。This photosensitive liquid consists of a photoconductive pigment, a resin, a solvent, and the like. As the solvent, for example, organic solvents such as tetrahydrofuran and toluene are used.
この溶剤は、常温で揮発性を有するため、感光液は速乾
性を呈する。Since this solvent is volatile at room temperature, the photosensitive solution dries quickly.
蓋体２０は、中空円柱状をしている。該蓋体２０は。The lid body 20 has a hollow cylindrical shape. The lid body 20 is.
円筒状の筒状部２２．該筒状部２２の底面に配設された
フロート部２１および上部端面に配設された蓋部２３と
を有する。蓋体２０内には、これらフロート部２１、筒
状部２２および蓋部２３にて囲まれた所定体積の空間２
４が形成されている。該フロート部２１および蓋部２３
の中央部には、塗布液をコーティングすべきドラム３０
が貫通し得る貫通孔２１ａおよび２３ａがそれぞれ形成
されている。Cylindrical tubular portion 22. The cylindrical portion 22 has a float portion 21 disposed on the bottom surface and a lid portion 23 disposed on the upper end surface. Inside the lid body 20, there is a space 2 of a predetermined volume surrounded by the float part 21, the cylindrical part 22, and the lid part 23.
4 is formed. The float part 21 and the lid part 23
A drum 30 to be coated with the coating liquid is located in the center of the drum 30.
Through-holes 21a and 23a are respectively formed through which the two can pass.
該蓋体２０は、フロート部２１が塗布液面内に沈まない
ように１例えば発泡スチロールのような軽量部材にて一
体的に成形される。従って、該蓋体２０は、塗布液面の
昇降に伴って全体が昇降する。The lid body 20 is integrally molded from a lightweight member such as styrofoam so that the float portion 21 does not sink into the surface of the coating liquid. Therefore, the entire lid 20 moves up and down as the coating liquid level rises and falls.
このような構成のドラム塗布装置によるドラムの塗布は
次のように行われる。塗布液をコーティングすべきドラ
ム３０を、蓋体２０の上部端面に配設された蓋部２３の
貫通孔２３ａを通過させ、さらに該蓋体２０内の空間２
４およびフロート部２１の貫通孔２１ａを通過させて、
第３図に示すように、塗布液１１内に完全に浸漬させる
。この場合、ドラム３０の両端面は、その内部に塗布液
が流入しないように。Coating on the drum using the drum coating device having such a configuration is performed as follows. The drum 30 to be coated with the coating liquid is passed through the through hole 23a of the lid 23 disposed on the upper end surface of the lid 20, and the space 2 inside the lid 20 is
4 and the through hole 21a of the float part 21,
As shown in FIG. 3, it is completely immersed in the coating liquid 11. In this case, the both end surfaces of the drum 30 are designed so that the coating liquid does not flow into them.
キャップ等の適当な部材にて閉塞されている。It is closed with a suitable member such as a cap.
ドラム３０全体を塗布液１１内に浸漬すると、塗布液１
１の液面が上昇するが、この上昇に伴い１Ｍ体２０も上
昇する。このとき、塗布液１１の溶剤蒸気が蓋体２０の
空間２４に充満される。次いで、ドラム３０は塗布液１
１より引き上げられ、フロート部２１の貫通孔２１ａか
ら空間２４内へ進入し、該空間２４を通過して蓋部２３
の貫通孔２３ａから上方へ排出される。When the entire drum 30 is immersed in the coating liquid 11, the coating liquid 1
1 rises, but along with this rise, the 1M body 20 also rises. At this time, the space 24 of the lid 20 is filled with the solvent vapor of the coating liquid 11. Next, the drum 30 receives the coating liquid 1.
1, enters the space 24 through the through hole 21a of the float part 21, passes through the space 24, and is lifted up from the lid part 23.
is discharged upward from the through hole 23a.
ドラム３０の塗布液からの排出に伴い、塗布液面は下降
し、その下降に伴って蓋体２０も下降する。ドラム３０
が塗布液から引き上げられる間に、ドラム３０の外周面
にコーティングされた塗布液は、空間２４を通過する間
に、その空間２４内に充満した溶剤蒸気に接触する。該
溶剤蒸気は、所定の体積の空間２４内に充満されている
ため、ドラム３０の外周面は、ドラムの引き上げに際し
て、常に一定濃度の溶剤蒸気と一定時間接触することに
なり、その溶剤蒸気の影響による塗布液の膜厚の不均一
を招来することなく、均一な膜厚に塗布液がコーティン
グされる。As the coating liquid is discharged from the drum 30, the level of the coating liquid descends, and with this descent, the lid 20 also descends. drum 30
While being pulled up from the coating liquid, the coating liquid coated on the outer peripheral surface of the drum 30 passes through the space 24 and comes into contact with the solvent vapor filling the space 24. Since the solvent vapor fills the space 24 with a predetermined volume, the outer peripheral surface of the drum 30 is always in contact with a certain concentration of solvent vapor for a certain period of time when the drum is pulled up, and the solvent vapor is The coating liquid can be coated with a uniform thickness without causing unevenness in the thickness of the coating liquid due to influences.
（発明の効果）
本発明のドラム塗布装置は、このように、塗布液上に所
定の空間を形成し、塗布液面の昇降に伴って昇降する蓋
体を有するため、その空間は塗布液面の昇降に拘らず、
常に一定である。従って。(Effects of the Invention) As described above, the drum coating device of the present invention forms a predetermined space above the coating liquid and has a lid that moves up and down as the coating liquid level rises and falls. Regardless of the elevation of
Always constant. Therefore.
塗布液の溶剤蒸気は、その一定体積の空間内に充満され
、ドラム外周面にコーティングされた塗布液は、該空間
内の一定の濃度の溶剤蒸気と接触するため、溶剤蒸気の
影響により塗布液の膜厚が不均一になるおそれがなく、
均一な膜厚に塗布液がコーティングされる。The solvent vapor of the coating liquid fills the space of a certain volume, and the coating liquid coated on the outer peripheral surface of the drum comes into contact with the solvent vapor of a certain concentration in the space, so the coating liquid is affected by the influence of the solvent vapor. There is no risk of uneven film thickness,
The coating liquid is coated with a uniform thickness.
４、 文 の ′ なｉＵ
第１図は本発明の一例を示すドラム塗布装置の断面図、
第２図はその一部破断平面図５第３図はその動作説明の
ための断面図である。4. Figure 1 is a sectional view of a drum coating device showing an example of the present invention.
FIG. 2 is a partially cutaway plan view thereof, and FIG. 3 is a sectional view for explaining its operation.
１０・・・タンク、１１・・・塗布液、２０・・・蓋体
、２１・・・フロート部、２２・・・周面部、２３・・
・蓋部、３０・・・ドラム。DESCRIPTION OF SYMBOLS 10... Tank, 11... Coating liquid, 20... Lid body, 21... Float part, 22... Surrounding part, 23...
・Lid part, 30...Drum.
以上that's all
Claims (1)
引き上げ、該塗布液にてドラム外周面を所定の膜厚にコ
ーティングするドラム塗布装置であり、 塗布液を収容するタンクと。 ドラムが貫通し得る貫通孔が形成されており、塗布液の
上方に所定の空間を形成して該塗布液面の昇降に伴って
昇降する蓋体と、 を具備するドラム塗布装置。 ２、前記蓋体が塗布液面に浮遊する特許請求の範囲第１
項に記載のドラム塗布装置。[Scope of Claims] 1. A drum coating device that immerses a drum in a coating solution, then lifts the drum from the coating solution, and coats the outer peripheral surface of the drum with the coating solution to a predetermined thickness, and contains the coating solution. with a tank. A drum coating device comprising: a lid body formed with a through hole through which the drum can pass, a lid that forms a predetermined space above a coating liquid and moves up and down as the level of the coating liquid rises and falls. 2. Claim 1, in which the lid body floats on the surface of the coating liquid.
Drum coating device as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16635786A JPS6320067A (en) | 1986-07-15 | 1986-07-15 | Device for coating drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16635786A JPS6320067A (en) | 1986-07-15 | 1986-07-15 | Device for coating drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6320067A true JPS6320067A (en) | 1988-01-27 |
Family
ID=15829886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16635786A Pending JPS6320067A (en) | 1986-07-15 | 1986-07-15 | Device for coating drum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6320067A (en) |
-
1986
- 1986-07-15 JP JP16635786A patent/JPS6320067A/en active Pending
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