JPH0342673B2 - - Google Patents
Info
- Publication number
- JPH0342673B2 JPH0342673B2 JP15409584A JP15409584A JPH0342673B2 JP H0342673 B2 JPH0342673 B2 JP H0342673B2 JP 15409584 A JP15409584 A JP 15409584A JP 15409584 A JP15409584 A JP 15409584A JP H0342673 B2 JPH0342673 B2 JP H0342673B2
- Authority
- JP
- Japan
- Prior art keywords
- corona discharge
- electrode
- discharge electrode
- surface treatment
- ultrasonic cleaning
- 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
Links
- 238000004381 surface treatment Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 239000011162 core material Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910000510 noble metal Inorganic materials 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 28
- 238000004506 ultrasonic cleaning Methods 0.000 description 19
- 229910052697 platinum Inorganic materials 0.000 description 15
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000003960 organic solvent Substances 0.000 description 6
- 108091008695 photoreceptors Proteins 0.000 description 6
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- -1 gold or platinum Chemical class 0.000 description 3
- 229910052762 osmium Inorganic materials 0.000 description 3
- 229910052703 rhodium Inorganic materials 0.000 description 3
- 239000000344 soap Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 241000270708 Testudinidae Species 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052741 iridium Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910002835 Pt–Ir Inorganic materials 0.000 description 1
- 229910002848 Pt–Ru Inorganic materials 0.000 description 1
- 229910018885 Pt—Au Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N diethyl ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は安定して均一な出力を出すことが可能
であり、しかも長い動作寿命を有し、機械的強度
にも秀れたコロナ放電電極を提供する為のコロナ
放電電極の表面処理方法に関する。[Detailed Description of the Invention] Industrial Application Field The present invention provides a corona discharge electrode that is capable of producing stable and uniform output, has a long operating life, and has excellent mechanical strength. This invention relates to a surface treatment method for a corona discharge electrode.
従来の技術
光導電体の上に静電荷を均一に与える為に、
種々の方法や装置が提案されている。このような
荷電装置の１つはコロトロンと呼ばれており、第
１図に示すような構成となつている。即ち高電圧
電源８がコロナ放電を行なう電極線６に電気コネ
クター７によつて接続されており、この電極線６
は電気的に接地された導電性シールド５に囲まれ
て、接地された感光体１に隣接して配置されてい
る。コロナ放電は、電極線６を感光体１に接近さ
せ、電極線６に充分に大きな電圧を与えた時に、
電極線６と感光体１との間の空気中のイオンの破
壊を生ぜしめて行なわれる。放電の結果、電極線
６の周囲に形成された帯電イオンは、接地された
感光体１へ向つて流れ、感光体表面に付着して感
光体表面を比較的高い電位に帯電する。Conventional technology In order to uniformly apply static charge to the photoconductor,
Various methods and devices have been proposed. One such charging device is called a corotron, and has a configuration as shown in FIG. That is, a high voltage power source 8 is connected to an electrode wire 6 for performing corona discharge by an electrical connector 7, and this electrode wire 6
is surrounded by an electrically grounded conductive shield 5 and placed adjacent to the grounded photoreceptor 1 . Corona discharge occurs when the electrode wire 6 is brought close to the photoreceptor 1 and a sufficiently large voltage is applied to the electrode wire 6.
This is done by causing destruction of ions in the air between the electrode wire 6 and the photoreceptor 1. As a result of the discharge, charged ions formed around the electrode wire 6 flow toward the grounded photoreceptor 1, adhere to the surface of the photoreceptor, and charge the surface of the photoreceptor to a relatively high potential.
電子写真技術に於いては、一貫した再性特性は
均一で一定の電位が光導電体に与えられた時にの
み維持し得るということが認められている。多く
の電子写真複写機に於いて、一般にコロトロンと
呼ばれる単線又は複線のコロナ放電電極が用いら
れており、このコロトロンの効率は、コロトロン
と光導電体表面との間の距離、コロトロン材料の
性質、コロトロンの直径、コロトロンのその他の
物理的特性、及びコロトロンに加えられるエネル
ギー等の多数の要因によつて決定される。 It has been recognized in the electrophotographic art that consistent reproducibility properties can only be maintained when a uniform and constant potential is applied to the photoconductor. Many electrophotographic copying machines use a single-wire or double-wire corona discharge electrode, commonly called a corotron, and the efficiency of this corotron depends on the distance between the corotron and the photoconductor surface, the properties of the corotron material, It is determined by a number of factors, such as the diameter of the corotron, other physical characteristics of the corotron, and the energy applied to the corotron.
従来コロトロンの材料としては、機械的強度に
秀れしかも安価であるなどの理由からタングステ
ンが多く用いられていた。又特開昭52−11042に
記載されるように比較的長期間に亘つて均一で安
定した放電を維持出来る金か白金等の貫金属を使
用することも多かつた。しかし、前者は均一で安
定した放電を短時間しか持続し得ず、後者は高価
である上に機械的強度も低く、又均一で安定した
放電をタングステン等の数倍の長期間に亘つて維
持出来るまでには至らなかつた。そこで両者の長
所を生かしたコロナ放電電極が提案されている。
実開昭58−88787によればこのコロナ放電電極は、
タングステン等の芯材に白金等の貴金属を被覆し
て二層構造に構成したものであり、芯材により機
械的強度を維持しかつ被覆材によりある程度の長
期間の安定したコロナ放電を維持するように構成
している。 Traditionally, tungsten has been widely used as a material for corotrons because of its excellent mechanical strength and low cost. Further, as described in Japanese Patent Application Laid-Open No. 11042/1983, metals such as gold or platinum, which can maintain a uniform and stable discharge for a relatively long period of time, were often used. However, the former can only maintain a uniform and stable discharge for a short period of time, while the latter is expensive and has low mechanical strength, and it cannot maintain a uniform and stable discharge for several times longer than tungsten etc. I didn't get to the point where I could do it. Therefore, a corona discharge electrode that takes advantage of the advantages of both has been proposed.
According to Utility Model Application No. 58-88787, this corona discharge electrode is
It has a two-layer structure with a core material such as tungsten coated with a noble metal such as platinum.The core material maintains mechanical strength, and the coating material maintains stable corona discharge for a certain amount of time. It is composed of
発明が解決しようとする問題点
しかし上述した二層構造のコロナ放電電極でも
安定した放電特性を飛躍的に向上させるには至ら
なかつた。この原因を解明する為に放電特性の劣
化したコロナ放電電極の表面を顕微鏡で観察した
ところ、小さな髭状の生成物が幾つも成長してい
るのが観察され、この髭の成分を分析したところ
そのほとんどはSiO2であることが判明した。充
分な放電特性を発揮するコロナ放電電極にはこの
髭の成長がほとんど見らないことも顕微鏡観察に
より確認された。Problems to be Solved by the Invention However, even the above-mentioned two-layered corona discharge electrode has not been able to dramatically improve stable discharge characteristics. In order to elucidate the cause of this, we observed the surface of the corona discharge electrode, whose discharge characteristics had deteriorated, under a microscope, and found that many small whisker-like products had grown.We analyzed the components of these whiskers. Most of it turned out to be SiO2 . It was also confirmed through microscopic observation that this growth of whiskers is hardly observed in corona discharge electrodes that exhibit sufficient discharge characteristics.
よつて本発明の目的は非常に安定した放電出力
を長期間に亘つて示し、かつ機械的強度にも秀れ
たコロナ放電電極を提供するコロナ放電電極の表
面処理方法を提供することである。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for surface treatment of a corona discharge electrode, which provides a corona discharge electrode that exhibits a very stable discharge output over a long period of time and has excellent mechanical strength.
問題点を解決するための手段
安定した放射特性を発揮するコロナ放電電極の
表面を顕微鏡観察したところ、この髭の成長はほ
とんど見られなかつた。よつてこの髭の成長を抑
えれば安定した放電特性を長時間に亘つて維持出
来るのではないかと考えて、本発明に至つたもの
である。本発明によれば、針金状の芯材を貴金属
あるいはその合金にて被覆した貴金属被膜コロナ
放電電極を水中にて充分な時間超音波洗浄を行な
うことにより、被覆材表面の汚れを取除くことを
特徴とするコロナ放電電極の表面処理方法が提供
される。このように本発明によれば、被覆材表面
の汚れが髭の成長を助長する原因ではないかと考
えて、この汚れを取除くのに水中での超音波洗浄
を行なつたところ、コロナ放電電極の放電特性を
飛躍的に向上することが出来た。水中での処理に
先立つてトリクロロエチレン等の有機溶剤中で超
音波洗浄を行なうと一層効果的である。更に本発
明によれば、水中での超音波洗浄が必須要件であ
るが、水にイオン交換を行なつた純水を使用した
場合には超音波洗浄の効果が更に顕著なものとな
る。Measures to solve the problem When the surface of the corona discharge electrode, which exhibits stable radiation characteristics, was observed under a microscope, almost no growth of this whisker was observed. Therefore, the present invention was developed based on the idea that stable discharge characteristics could be maintained for a long time by suppressing the growth of whiskers. According to the present invention, stains on the surface of the coating material can be removed by ultrasonically cleaning a noble metal coated corona discharge electrode in which a wire-shaped core material is coated with a noble metal or its alloy in water for a sufficient period of time. A method for surface treatment of a corona discharge electrode is provided. As described above, according to the present invention, we thought that dirt on the surface of the coating material may be the cause of promoting beard growth, and when we performed ultrasonic cleaning in water to remove this dirt, we found that the corona discharge electrode We were able to dramatically improve the discharge characteristics of. It is more effective to perform ultrasonic cleaning in an organic solvent such as trichlorethylene prior to treatment in water. Further, according to the present invention, ultrasonic cleaning in water is an essential requirement, but the effect of ultrasonic cleaning becomes even more remarkable when pure water that has been subjected to ion exchange is used.
本発明の表面処理方法が適用される二重構造の
コロナ放電電極は第２図に示すような構造となつ
ている。即ちタングステン、モリブデン、ステン
レス等の芯材１０に白金族金属、金、銀、及びこ
れらの合金等から成る被覆材１１を被覆した構造
となつている。又芯材としてピアノ線を用いた場
合には、強度的には問題はなかつたが、コロナ放
電電極に腐蝕が起こり断線してしまつて使用には
適さなかつた。被覆材としては白金（Pt）が一
番適しているが、白金のほかに次ぎのような貴金
属及びその合金が使用可能である。即ち、ルテニ
ウム（Ru）、ロジウム（Rh）、パラジウム（Pd）、
オスミウム（Os）、イリジウム（Ir）、金（Au）、
銀（Ag）、及びそれらの合金であるPt−Ru、Pt
−Rh、Pt−Rd、Pt−Os、Pt−Ir、Pt−Au、Pt
−Ag、Au−Ag、Ag−Pd、Pt−Au−Ag等が使
用可能であつたが、前記Pt、Ru、Rh、Os、Ir、
Au、Ag等の純金属に比べると前記合金は若干安
定した出力の維持性において劣つた。 A double-structured corona discharge electrode to which the surface treatment method of the present invention is applied has a structure as shown in FIG. That is, it has a structure in which a core material 10 made of tungsten, molybdenum, stainless steel, etc. is coated with a coating material 11 made of platinum group metals, gold, silver, alloys thereof, or the like. When piano wire was used as the core material, there was no problem in terms of strength, but the corona discharge electrode corroded and broke, making it unsuitable for use. Platinum (Pt) is the most suitable coating material, but in addition to platinum, the following noble metals and their alloys can also be used. That is, ruthenium (Ru), rhodium (Rh), palladium (Pd),
Osmium (Os), Iridium (Ir), Gold (Au),
Silver (Ag) and their alloys Pt-Ru, Pt
−Rh, Pt−Rd, Pt−Os, Pt−Ir, Pt−Au, Pt
-Ag, Au-Ag, Ag-Pd, Pt-Au-Ag, etc. could be used, but the above-mentioned Pt, Ru, Rh, Os, Ir,
Compared to pure metals such as Au and Ag, the alloys were slightly inferior in maintaining stable output.
本発明の表面処理プロセスは、このように構成
された二層構造のコロナ放電電極を先ずトリクロ
ロエチレン等の有機溶剤中で超音波洗浄を行な
い、これにより表面に付着した金属石鹸、塩分、
脂肪分、アミン類等の汚れを取除いた後純水中で
充分な時間超音波洗浄を行ない最後に自然乾燥あ
るいは強制乾燥をするステツプから構成される。
本発明の表面処理方法に於いては、純水中での超
音波洗浄が必須要件であり、トリクロロエチレン
等の有機溶剤中での超音波洗浄は前述した金属石
鹸等が表面に付着していない場合には必ずしも施
す必要はない。しかし実際の応用に於いては工場
の製造ラインに於いて金属石鹸等の汚れが表面上
に付着しているのは通常であるが、有機溶剤中で
の超音波洗浄ステツプを施したほうが望ましい。
有機溶媒はトリクロロエチレンのほかに、
CH3Cl，CH2Cl2，CH3CCl3，CCl2
＝CCl2，CCl3F，
CCl2F−CClF2，
CCl2F−CCl2F，C6H4（CH3）2，CH3OH、
CH3CH2OH，■■■ 亀の甲 ［0062］ ■■
■
，CH3CH2OCH2CH3，■■■ 亀の甲 ［0063
］ ■■■
が採用可能であり、有機溶剤の外には、
HCl＋H2O2＋H2O，
H2SO4＋H2O2，CrO3＋H2SO4，
HNO3＋H2SO4，HF＋HNO3，等の酸、
NH4OH＋H2O2＋H2O等のアルカリなどが使用
可能である。 In the surface treatment process of the present invention, the two-layered corona discharge electrode constructed as described above is first subjected to ultrasonic cleaning in an organic solvent such as trichlorethylene, thereby removing metal soap, salt, and other substances adhering to the surface.
It consists of the steps of removing dirt such as fat and amines, followed by ultrasonic cleaning in pure water for a sufficient period of time, and finally natural or forced drying.
In the surface treatment method of the present invention, ultrasonic cleaning in pure water is an essential requirement, and ultrasonic cleaning in an organic solvent such as trichlorethylene can be carried out only if the metal soap, etc. mentioned above is not attached to the surface. does not necessarily need to be applied. However, in actual applications, it is common for metal soap and other contaminants to adhere to surfaces in factory production lines, so it is preferable to perform an ultrasonic cleaning step in an organic solvent.
In addition to trichloroethylene, organic solvents include CH 3 Cl, CH 2 Cl 2 , CH 3 CCl 3 , CCl 2 = CCl 2 , CCl 3 F, CCl 2 F−CClF 2 , CCl 2 F−CCl 2 F, C 6 H 4 (CH 3 ) 2 , CH 3 OH,
CH 3 CH 2 OH, ■■■ Tortoise shell [0062] ■■
■ , CH 3 CH 2 OCH 2 CH 3 , ■■■ Tortoise shell [0063
] ■■■ can be adopted, and in addition to organic solvents, HCl + H 2 O 2 + H 2 O, H 2 SO 4 + H 2 O 2 , CrO 3 +H 2 SO 4 , HNO 3 +H 2 SO 4 , HF + HNO 3 , etc. acids,
Alkali such as NH 4 OH + H 2 O 2 + H 2 O can be used.
本発明のコロナ放電電極の表面処理方法の効果
を確認する為に、表面処理を施さないコロナ放電
電極との間で比較実験を行なつた。安定した放電
特性を発揮するのに許容される出力レベルとし
て、放電線の軸方向についてのコロナ放電電流分
布のむらの割合が30％に達する迄とし、その時ま
での時間を測定して表１に示した。試料No.９乃至
12が本発明の表面処理方法を施した試料であり、
表面処理としてはアセトン中で10分間の超音波洗
浄を行ない、次いで純水中で５分間の超音波洗浄
を行なつてか自然乾燥をした。 In order to confirm the effects of the surface treatment method for a corona discharge electrode of the present invention, a comparative experiment was conducted with a corona discharge electrode that was not subjected to surface treatment. The permissible output level for exhibiting stable discharge characteristics is until the proportion of unevenness in the corona discharge current distribution in the axial direction of the discharge wire reaches 30%, and the time up to that point is measured and shown in Table 1. Ta. Sample No.9~
12 is a sample subjected to the surface treatment method of the present invention,
For surface treatment, ultrasonic cleaning was carried out in acetone for 10 minutes, followed by ultrasonic cleaning in pure water for 5 minutes, and then air-dried.
■■■ 亀の甲 ［0018］ ■■■
表１を観察することにより本発明の表面処理方
法を施した白金被覆線９乃至１２は、本発明の処
理を施さない試料に比較して飛躍的に安定した放
電特性を発揮できる時間が増加していることがわ
かる。即ち無処理のタングステン線に比較してそ
の寿命は約７〜８倍、無処理の白金被覆線に比較
して約４〜５倍その寿命がのびていることが判
る。よつてこの比較実験データから、本発明の表
面処理を施すことによりコロナ放電電極の寿命を
飛躍的に増大させることが出来、まさに画期的な
表面処理方法であるといえる。■■■ Turtle Shell [0018] ■■■ From observing Table 1, platinum coated wires 9 to 12 subjected to the surface treatment method of the present invention are significantly more stable than samples not subjected to the treatment of the present invention. It can be seen that the time during which the discharge characteristics can be exhibited is increasing. That is, it can be seen that the life of the wire is about 7 to 8 times longer than that of an untreated tungsten wire, and about 4 to 5 times longer than that of an untreated platinum coated wire. Therefore, from this comparative experimental data, it can be said that by applying the surface treatment of the present invention, the life of the corona discharge electrode can be dramatically increased, and that it is a truly innovative surface treatment method.
上述したように本発明の表面処理方法に於いて
は、水中での超音波洗浄が必須であるが、水は純
水を使用するのが望ましい。本明細書で使用する
純水とは、蒸溜水を更にイオン交換した水を指
す。アセトン溶液中で10分間の超音波洗浄を行な
い、次いで水道水中で５分間の超音波洗浄を行な
つたコロナ放電電極の許容出力レベルを維持でき
る時間は71時間であつた。この71時間を表１の純
水中で５分間超音波洗浄を行なつた結果である試
料No.９乃至12と比較すると、純水の効果がいかに
高いかが判る。又超音波を使用しないで、アセト
ン溶液中で洗浄を行ない次いで純水中で洗浄を行
なつたコロナ放電電極の放電特性を測定したとこ
ろ、その許容時間は125時間であつた。この結果
より、超音波洗浄を行なわなくとも許容出来るコ
ロナ放電特性を維持できる時間は表面を処理しな
い場合に比較して相当改善されているので、超音
波洗浄が必ずしも必要ではないように見受けられ
るが、超音波洗浄を使用しないで表面処理をした
場合には多くの時間が必要とされるので実用的で
ない。 As mentioned above, in the surface treatment method of the present invention, underwater ultrasonic cleaning is essential, but it is preferable to use pure water. Pure water as used herein refers to water obtained by further ion-exchanging distilled water. The corona discharge electrode, which was subjected to 10 minutes of ultrasonic cleaning in an acetone solution and then 5 minutes of ultrasonic cleaning in tap water, could maintain an acceptable output level for 71 hours. Comparing these 71 hours with Samples Nos. 9 to 12, which are the results of 5 minutes of ultrasonic cleaning in pure water shown in Table 1, it can be seen how effective the pure water is. Furthermore, when the discharge characteristics of a corona discharge electrode that was cleaned in an acetone solution and then in pure water without using ultrasonic waves was measured, the allowable time was 125 hours. From these results, it appears that ultrasonic cleaning is not necessarily necessary, as the time for which acceptable corona discharge characteristics can be maintained without ultrasonic cleaning is considerably improved compared to when the surface is not treated. However, surface treatment without using ultrasonic cleaning is not practical because it requires a lot of time.
実施例
純水なタングステン芯材に純粋白金パイプを被
せたあと冷間にて線引を行なうことにより、白金
重量率30％のいわゆる白金被覆構造とした線径
90μの針金状電極を製造した。この電極をトリク
ロロエチレン中にて10分間超音波洗浄を行ない、
次いで純水中で５分間超音波洗浄を行なつた後、
通電により乾燥した。このように処理した電極を
顕微鏡で観察した所、電極の表面は汚れのない、
しかも極めて平滑な面となつているが観察され
た。このように表面処理を行なつた電極の出力性
能を確かめる為に、この実施例により処理された
電極と表面処理を行なわない白金被覆電極及びタ
ングステン線電極との比較試験を行なつた。各電
極を第１図の装置に配置して作動させた所、タン
グステン線電極は約25時間で許容する出力レベル
を下回り、表面処理を行なわない白金被覆電極は
約35時間で許容する出力レベルを下回つた。しか
し本実施例の電極は約150時間使用した場合にお
いても許容レベルを下回らず尚も使用が可能であ
つた。Example: A pure platinum pipe is placed over a pure water tungsten core material and then cold drawn to create a so-called platinum coated structure with a platinum weight percentage of 30%.
A 90μ wire-like electrode was manufactured. This electrode was ultrasonically cleaned in trichlorethylene for 10 minutes.
Next, after performing ultrasonic cleaning in pure water for 5 minutes,
It was dried by applying electricity. When the electrodes treated in this way were observed under a microscope, the surface of the electrodes was clean and free of dirt.
Furthermore, it was observed that the surface was extremely smooth. In order to confirm the output performance of the electrode subjected to surface treatment in this manner, a comparative test was conducted between the electrode treated according to this example and a platinum-coated electrode and a tungsten wire electrode without surface treatment. When each electrode was placed in the apparatus shown in Figure 1 and operated, the tungsten wire electrode fell below the allowable output level in about 25 hours, and the platinum-coated electrode without surface treatment dropped below the allowable output level in about 35 hours. It was below. However, even when the electrode of this example was used for about 150 hours, it did not fall below the allowable level and was still usable.
発明の効果
本発明の表面処理を電極表面を施すことによ
り、電極表面を汚れのない平滑な面とすることが
出来る。その結果許容出来るコロナ放電特性を維
持出来るコロナ放電電極の寿命を飛躍的に向上す
ることが出来る。Effects of the Invention By subjecting the surface of an electrode to the surface treatment of the present invention, the surface of the electrode can be made smooth and free of stains. As a result, the life of a corona discharge electrode that can maintain acceptable corona discharge characteristics can be dramatically improved.
第１図は感光ドラムに隣接して設けられたコロ
ナ帯電器の一部破断斜視図、第２図は二層構造コ
ロナ放電電極の斜視図である。
１：感光ドラム、２：光導電性絶縁層、３：導
電層、４：コロナ放電装置、５：シールド部材、
６：コロナ放電電極、７：電気コネクター、８：
高圧電源、１０：タングステン芯材、１１：白金
被覆材。
FIG. 1 is a partially cutaway perspective view of a corona charger provided adjacent to a photosensitive drum, and FIG. 2 is a perspective view of a two-layer corona discharge electrode. 1: Photosensitive drum, 2: Photoconductive insulating layer, 3: Conductive layer, 4: Corona discharge device, 5: Shield member,
6: Corona discharge electrode, 7: Electrical connector, 8:
High voltage power supply, 10: Tungsten core material, 11: Platinum coating material.
Claims (1)
被膜した貴金属被膜コロナ放電電極をイオン交換
を行つた純水中にて充分な時間超音波洗浄を行う
ことにより、被膜材表面の汚れを取り除くことを
特徴とするコロナ放電電極の表面処理方法。1. Remove dirt from the surface of the coating material by ultrasonically cleaning the noble metal coated corona discharge electrode, which has a wire-shaped core material coated with a noble metal or its alloy, in ion-exchanged pure water for a sufficient period of time. A method for surface treatment of a corona discharge electrode, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15409584A JPS6132872A (en) | 1984-07-26 | 1984-07-26 | Surface treatment of corona discharge electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15409584A JPS6132872A (en) | 1984-07-26 | 1984-07-26 | Surface treatment of corona discharge electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6132872A JPS6132872A (en) | 1986-02-15 |
| JPH0342673B2 true JPH0342673B2 (en) | 1991-06-27 |
Family
ID=15576799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15409584A Granted JPS6132872A (en) | 1984-07-26 | 1984-07-26 | Surface treatment of corona discharge electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6132872A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0636112B2 (en) * | 1984-10-30 | 1994-05-11 | 株式会社東芝 | Image forming device |
| DE9013722U1 (en) * | 1990-10-02 | 1991-01-24 | Berkenhoff Gmbh, 6301 Heuchelheim, De | |
| US9985420B2 (en) | 2014-03-20 | 2018-05-29 | Sharp Kabushiki Kaisha | Discharge device |
-
1984
- 1984-07-26 JP JP15409584A patent/JPS6132872A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6132872A (en) | 1986-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1150843A (en) | Method of cleaning probe tips of probe cards and apparatus for impelementing method | |
| JPH0342673B2 (en) | ||
| US5539205A (en) | Corona generating device and method of fabricating | |
| JPH03501101A (en) | electrical discharge machining electrode | |
| CH634436A5 (en) | METHOD OF DRAWING A CONDUCTOR. | |
| DE2700761A1 (en) | PROCESS FOR INCREASING THE VOLTAGE STRENGTH PROPERTY OF VACUUM BREAKERS | |
| US3048528A (en) | Descaling titanium and titanium alloy articles | |
| JPS61219415A (en) | Heat treatment of corona discharge electrode | |
| DE19603093C2 (en) | Rod-shaped electrode with a corrosion protection layer and method for producing the same | |
| US3841983A (en) | Surface preparation process for recoating of used coated metallic electrodes | |
| JPS5825218A (en) | Method of producing low voltage electrolytic condenser electrode foil | |
| CN113686932A (en) | Conductive carbon paste modified stainless steel wire mesh working electrode and preparation method and application thereof | |
| US6495026B1 (en) | Process to sever metal fibers using galvanic cell | |
| JP2006038641A (en) | Contact probe | |
| DE3122662C2 (en) | ||
| US4828662A (en) | Electrolytic stripping of cobalt | |
| JPH04281865A (en) | Ionization wire in electric dust collector | |
| JPS61219414A (en) | Manufacture of corona discharge electrode | |
| US3723793A (en) | Coated corona generating electrode | |
| JPS60218489A (en) | Scale removing method and device for metal strip | |
| Dietrick et al. | Ultrasonic waves and electrochemistry. III. An electrokinetic effect produced by ultrasonic waves | |
| JPH04281864A (en) | Ionization wire in electric dust collector | |
| CN109904002A (en) | A kind of preparation method and bottom-resistive electrode of bottom-resistive electrode | |
| JPH02291574A (en) | Fine wire for discharge electrode | |
| JPS6115640B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |