JP2022135104A - Ultrasonic cleaning device - Google Patents

Ultrasonic cleaning device Download PDF

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JP2022135104A
JP2022135104A JP2021034699A JP2021034699A JP2022135104A JP 2022135104 A JP2022135104 A JP 2022135104A JP 2021034699 A JP2021034699 A JP 2021034699A JP 2021034699 A JP2021034699 A JP 2021034699A JP 2022135104 A JP2022135104 A JP 2022135104A
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ultrasonic
cleaning
cleaned
tank
cleaning liquid
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眞治 永沼
Shinji Naganuma
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FLEX CO Ltd
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Abstract

To improve ultrasonic cleaning capability by preventing or reducing re-attachment of an ultrasonic peeled material such as a residue or dirt to a cleaned object.SOLUTION: When traversing a slit-like opening 32, a flexographic printing plate (cleaned object) 100 line-sequentially collides with a jet flow of a cleaning liquid L J to which ultrasonic vibration is imparted, and is conveyed while subjected to ultrasonic cleaning. While the flexographic printing plate 100 collides with the jet flow J, a residue and dirt R of ink stuck to the surface are peeled and removed by cleaning effect of the ultrasonic vibration emitted with the jet flow J as a medium. A gap between the flexographic printing plate 100 and a flow regulation member 31 functions as a temporary discharge flow channel of the jet flows F, F after taking an ultrasonic peeled material (residue and dirt R of ink) and colliding therewith.SELECTED DRAWING: Figure 1

Description

この発明は、洗浄液の液中で被洗浄物に超音波振動を作用させて、被洗浄物を洗浄処理するための超音波洗浄装置に係り、とくには、フレキソ印版の洗浄処理に用いて好適な超音波洗浄装置に関する。 The present invention relates to an ultrasonic cleaning apparatus for cleaning an object to be cleaned by applying ultrasonic vibrations to the object to be cleaned in a cleaning liquid, and is particularly suitable for use in cleaning flexographic printing plates. related to an ultrasonic cleaning device.

段ボール印刷には、柔軟で弾力性のあるフレキソ印版を用いる凸版印刷方式が広く採用されている。この印刷方式は、フレキソ印刷方式と呼ばれる。ここで、フレキソ印版100とは、図4に示すように、複数の樹脂凸版101,101,…をキャリア用フィルム102の表面に配置して貼り付けた状態のものをいう。フレキソ印刷では、フレキソ印版100を図示せぬ印刷機の版胴に密着した状態で巻装し、版胴を回転させ、アニロックスロールで、版胴の回転に従って(フレキソ印版100の)樹脂凸版101,101,…にインクを塗布し、圧胴で樹脂凸版101,101,…に印圧を与えて、インクを段ボールに転写することで、印刷が行われる。この種の樹脂凸版101,101,…は、表面に起伏がある被印刷体に対しても柔軟に追従密着できる弾力性素材から形成されているため、段ボールに限らず、厚紙やフィルムや合板などのように、表面がざらざらした被印刷体に対しても良好に印刷することができ、印刷終了後は、版胴からフレキソ印版100を取り外し、樹脂凸版101,101,…の表面に付着するインクの残滓や汚れを洗浄して除去すれば、何度でも使用することができる。 A letterpress printing method using a flexible and elastic flexographic printing plate is widely used for corrugated board printing. This printing method is called a flexographic printing method. Here, the flexographic printing plate 100 refers to a state in which a plurality of resin relief printing plates 101, 101, . . . In flexographic printing, the flexographic printing plate 100 is wound in close contact with the plate cylinder of a printing machine (not shown), the plate cylinder is rotated, and an anilox roll follows the rotation of the plate cylinder to roll the resin relief plate (of the flexographic printing plate 100). Printing is performed by applying ink to 101, 101, . . . , applying printing pressure to the resin relief plates 101, 101, . Since this type of resin letterpress 101, 101, ... is formed of an elastic material that can flexibly follow and adhere to a printing medium having undulations on its surface, it can be applied not only to corrugated cardboard, but also to cardboard, film, plywood, and the like. As described above, it is possible to print well even on a printing material with a rough surface, and after printing is completed, the flexographic printing plate 100 is removed from the printing cylinder and adhered to the surface of the resin relief printing plates 101, 101, ... It can be used again and again as long as the ink residue and dirt are removed by washing.

ところで、従来、フレキソ印版100の洗浄は、図5に示すように、洗浄液シャワー201を浴びせると共に、洗浄ブラシ202を回転させて、使用後の樹脂凸版101,101,…から、インクの残滓や汚れRを擦り落とすことで行われていた。しかしながら、洗浄ブラシ202による擦り洗いでは、洗浄を重ねるにつれて、樹脂凸版101,101,…自体が摩耗損傷してしまう、という問題がある。加えて、今日、段ボール印刷に対する詳細描画化の要望に沿って、形状が細密化した樹脂凸版101,101,…の凹状細部Dに対して、有径の洗浄ブラシ202を差し入れて、頑固にこびりついたインクの残滓や汚れを機械的力学的に洗浄除去することは、もはや困難な状況になっている。 By the way, conventionally, as shown in FIG. 5, the cleaning of the flexographic printing plate 100 is carried out by pouring a cleaning liquid shower 201 and rotating the cleaning brush 202 to remove ink residues and ink from the used resin relief printing plates 101, 101, . This was done by rubbing off the dirt R. However, rubbing with the cleaning brush 202 has a problem that the resin relief plates 101, 101, . . . In addition, today, in line with the demand for detailed drawing in corrugated cardboard printing, a cleaning brush 202 with a diameter is inserted into the concave details D of the resin relief plates 101, 101, . It is no longer possible to mechanically and dynamically wash away the ink residue and stains that have accumulated on the surface.

上記のような力学的な擦り洗い方式に頼らずに、基板に付着する残滓や汚れを良好に除去できる洗浄装置としては、たとえば、特許文献1や特許文献2に記載の超音波洗浄装置を挙げることができる。
特許文献1に記載のものは、槽型の超音波洗浄装置であって、内部に洗浄液を収容して被洗浄基板を浸漬する洗浄容器と、この洗浄容器内の洗浄液に超音波を付与する帯板状の超音波振動子と長方形の振動板との組からなる超音波照射手段とを備えて概略構成されている。この構成において、上記洗浄容器内の洗浄液を伝達媒体として、洗浄液の液中に漬かる上記被洗浄基板に対して超音波振動を照射すると、超音波の洗浄作用によって、残滓や汚れが基板表面の隅々から剥離(以下、超音波剥離ともいう)し、洗浄液の液中で浮遊分散状態となって除去される。
Examples of cleaning devices that can satisfactorily remove residues and stains adhering to substrates without relying on the above-described mechanical scrubbing method include ultrasonic cleaning devices described in Patent Documents 1 and 2. be able to.
The one disclosed in Patent Document 1 is a tank-type ultrasonic cleaning apparatus, which includes a cleaning container in which a cleaning liquid is contained and a substrate to be cleaned is immersed, and a belt for applying ultrasonic waves to the cleaning liquid in the cleaning container. It is roughly configured to include an ultrasonic irradiation means comprising a set of a plate-like ultrasonic transducer and a rectangular diaphragm. In this configuration, when the substrate to be cleaned immersed in the cleaning liquid is irradiated with ultrasonic vibration using the cleaning liquid in the cleaning container as a transmission medium, the cleaning action of the ultrasonic wave removes residue and dirt from the corners of the substrate surface. It is peeled off from each other (hereinafter also referred to as ultrasonic peeling), and is removed in a floating and dispersed state in the cleaning liquid.

特許文献2に記載のものは、流水ノズル型の超音波洗浄装置であって、洗浄液を収容する横長形状の噴射室と、この噴射室内の洗浄液に超音波を印加する超音波振動子と振動板との組からなる超音波印加手段と、噴射室内で超音波を印加された洗浄液を被洗浄基板に向けて噴射するスリット状の吐出口とを備える構成となっている。この構成において、超音波を印加された洗浄液が、上記スリット状の吐出口から、基板の表面に滝状に噴射すると、基板表面に付着する残滓や汚れは、基板との結合力を失い、超音波剥離して除去される。 Patent document 2 describes an ultrasonic cleaning apparatus of a running water nozzle type, which includes a horizontally elongated injection chamber containing a cleaning liquid, an ultrasonic transducer and a diaphragm for applying ultrasonic waves to the cleaning liquid in the injection chamber. and a slit-like ejection port for ejecting the cleaning liquid to which the ultrasonic waves have been applied in the ejection chamber toward the substrate to be cleaned. In this configuration, when the cleaning liquid to which ultrasonic waves are applied is sprayed from the slit-shaped ejection port onto the surface of the substrate in a waterfall pattern, the residue and dirt adhering to the surface of the substrate lose their binding force with the substrate, and the ultrasonic wave is removed. Removed by sonic ablation.

特開2001-340820号公報Japanese Patent Application Laid-Open No. 2001-340820 特開2008-80225号公報JP-A-2008-80225

しかしながら、特許文献1に記載の構成では、基板表面から超音波剥離した残滓や汚れは、洗浄液の乱流に取り込まれて、槽内に浮遊分散し、やがて、洗浄液(アルカリ水溶液)に溶解して消滅するか、循環ポンプによって排出される。これは、言ってみれば、超音波振動の攪拌作用にゆだねる溶解・排出であるため、残滓や汚れの浮遊物の中には、溶解前に、出発点の基板表面に逆戻りして、そこで、ファンデルワールス力の作用を受けて、再付着するものもあり、この再付着の状態で洗浄処理が完了すると、折角の超音波の洗浄能力が阻害される、という不具合がある。 However, in the configuration described in Patent Document 1, the residue and dirt that have been ultrasonically peeled off from the substrate surface are caught in the turbulent flow of the cleaning liquid, suspended and dispersed in the bath, and eventually dissolved in the cleaning liquid (alkaline aqueous solution). It either disappears or is discharged by the circulation pump. Since this is, so to speak, dissolution and discharge subject to the agitating action of ultrasonic vibration, some of the suspended matter of residue and dirt will return to the substrate surface at the starting point before dissolution, and there, Some of them are re-adhered under the action of van der Waals force, and if the cleaning process is completed in this state of re-adhesion, there is a problem that the cleaning ability of the ultrasonic waves is hindered.

この点、特許文献2に記載のものは、基板に衝突後の噴流が、基板表面から超音波剥離した残滓や汚れを排出する移動媒体として機能するので、上記のような再付着の不具合は生じない反面、樹脂成型体の被洗浄物に対しては、重大な熱的弊害を招く虞がある。
その理由は、次の通りである。すなわち、被洗浄物が基板のように薄厚の場合、一般に、表裏面とも、超音波振動の影響を受けて発熱するが、特許文献2に記載の構成では、冷却媒体でもある洗浄液の噴流に晒されるのは、被洗浄物の表面側だけであるため、表面側は安定温度に保たれるものの、裏面側は、過熱状態となりがちである。
In this respect, in the method disclosed in Patent Document 2, the jet flow after colliding with the substrate functions as a moving medium for discharging the residue and dirt that have been ultrasonically separated from the substrate surface. On the other hand, there is a risk of serious thermal damage to the object to be cleaned, which is a resin molding.
The reason is as follows. That is, when the object to be cleaned is thin, such as a substrate, generally both the front and back surfaces are affected by ultrasonic vibrations and generate heat. Since only the front side of the object to be cleaned is heated, the front side is kept at a stable temperature, but the back side tends to be overheated.

この場合の被洗浄物が、耐熱性の高い金属材料や半導体材料であれば、このような過熱状態に対しても、支障なく耐えることができる。しかし、被洗浄物が、耐熱性が低く柔軟な樹脂成型体、たとえば、フレキソ印版の場合、キャリア用フィルムの裏面側が、熱変質や熱損傷して、キャリア用フィルムの版胴に対する巻装追従性が損なわれ、この結果、印刷品質の著しい低下を招く虞がある。したがって。特許文献2に記載のものは、フィルム状の樹脂成型体用の超音波洗浄装置として不向きである。 If the object to be cleaned in this case is a highly heat-resistant metal material or semiconductor material, it can withstand such an overheated state without any problem. However, when the object to be cleaned is a flexible resin molding with low heat resistance, such as a flexographic printing plate, the back side of the carrier film is thermally degraded or damaged, and the carrier film follows the winding around the plate cylinder. This can result in significant deterioration in print quality. therefore. The apparatus described in Patent Document 2 is not suitable as an ultrasonic cleaning apparatus for film-shaped resin moldings.

この発明は、上述の事情に鑑みてなされたもので、被洗浄物の熱損傷を抑えて安心安全に洗浄できると共に、残滓や汚れの被洗浄物への再付着を防止又は軽減することにより、一段と高い洗浄度を得ることができる超音波洗浄装置を提供することを目的としている。 The present invention has been made in view of the above-mentioned circumstances. An object of the present invention is to provide an ultrasonic cleaning apparatus capable of obtaining a higher degree of cleaning.

上記課題を解決するために、請求項1記載の発明は、洗浄液の液中で被洗浄物に超音波を作用させて、当該被洗浄物を洗浄処理するための超音波洗浄装置に係り、洗浄液を収容し上記被洗浄物を上記洗浄液の液中に浸漬する第1の槽と、開口部を介して、上記第1の槽内の洗浄液の液中に連通する態様で、上記洗浄液を収容する第2の槽と、上記開口部から、上記第1の槽内の洗浄液の液中に、上記第2の槽内の洗浄液を噴流として流出させる噴流発生手段と、上記第2の槽内の上記噴流となる洗浄液に超音波を付与し、該噴流を伝達媒体として、上記開口部から上記第1の槽内の洗浄液の液中に浸漬される上記被洗浄物に照射する超音波照射手段と、を備えてなることを特徴としている。 In order to solve the above-mentioned problems, the invention according to claim 1 relates to an ultrasonic cleaning apparatus for cleaning an object to be cleaned by applying ultrasonic waves to the object to be cleaned in a cleaning liquid. and immersing the object to be cleaned in the cleaning liquid; a second tank; a jet generating means for causing the cleaning liquid in the second tank to flow out as a jet into the liquid of the cleaning liquid in the first tank from the opening; ultrasonic wave irradiation means for applying ultrasonic waves to the cleaning liquid to be a jet stream, and irradiating the object to be cleaned, which is immersed in the cleaning liquid in the first tank, from the opening using the jet stream as a transmission medium; It is characterized by comprising

また、請求項2記載の発明は、請求項1記載の超音波洗浄装置に係り、上記開口部に隣接して、上記被洗浄物に衝突後の噴流の流れを規制して、上記超音波の作用により上記被洗浄物から剥離した残滓や汚れの浮遊物の再付着を防止又は軽減するための面状の流れ規制部材がさらに付加されてなると共に、上記被洗浄物を洗浄液に浸漬して上記開口部と上記流れ規制部材とに面対向の状態で超音波洗浄処理を行う際は、上記被洗浄物と上記流れ規制部材との間の間隙に、上記浮遊物を取り込んだ上記衝突後の噴流を超音波の作用域又はその近傍から遠ざかる方向に所定の勢いで排出する一時的流路が形成される構成となっていることを特徴としている。 The invention according to claim 2 relates to the ultrasonic cleaning apparatus according to claim 1, and is adjacent to the opening to regulate the flow of the jet after colliding with the object to be cleaned so that the ultrasonic wave A planar flow regulating member is further added for preventing or reducing the re-adhesion of suspended matter such as residue and dirt separated from the object to be cleaned by the action, and the object to be cleaned is immersed in the cleaning liquid to perform the above-mentioned cleaning. When ultrasonic cleaning is performed in a state where the opening and the flow restricting member face each other, the post-collision jet flow containing the floating matter is placed in the gap between the object to be cleaned and the flow restricting member. It is characterized in that a temporary flow path is formed for discharging with a predetermined momentum in a direction away from the action area of the ultrasonic wave or its vicinity.

請求項3記載の発明は、請求項1又は2記載の超音波洗浄装置に係り、上記第2の槽には、所定の距離を隔てて相対向する、基端側の上記超音波照射手段と先端側の上記開口部との間に、上記被洗浄物に対する超音波照射に供される超音波集中手段が設けられ、該超音波集中手段は、上記超音波照射手段によって上記噴流となる洗浄液に付与された超音波が、先端側の上記開口部に向けて伝搬するにつれて、漸次集中度が増加するように、両端開口で中空先細りの形状に構成されていることを特徴としている。 The invention according to claim 3 relates to the ultrasonic cleaning apparatus according to claim 1 or 2, wherein the second tank includes the ultrasonic irradiation means on the proximal end side facing each other with a predetermined distance therebetween. An ultrasonic wave concentrating means for irradiating ultrasonic waves to the object to be cleaned is provided between the opening on the tip side and the ultrasonic wave concentrating means is applied to the cleaning liquid which becomes the jet stream by the ultrasonic wave irradiating means. It is characterized by having a hollow tapered shape with openings at both ends so that the degree of concentration increases gradually as the applied ultrasonic wave propagates toward the opening on the tip side.

また、請求項4記載の発明は、請求項3記載の超音波洗浄装置に係り、両端開口で中空先細りの形状を有する上記超音波照射室と面状の上記流れ規制部材とが、一対の長尺な金属板を、それぞれ、所定の方向に延びる折曲部位にて鋭角に折曲連設されてなると共に、一対の上記折曲部位を所定の隙間を隔てる態様で、相対向配置させてスリット状の上記開口部が形成されていることを特徴としている。 The invention according to claim 4 relates to the ultrasonic cleaning apparatus according to claim 3, wherein the ultrasonic irradiation chamber having a hollow tapered shape with openings at both ends and the flow restricting member having a planar shape comprise a pair of long A long metal plate is bent at an acute angle at a bent portion extending in a predetermined direction and connected to each other, and the pair of bent portions are arranged to face each other with a predetermined gap therebetween to form a slit. It is characterized in that the opening is formed in a shape of a shape.

また、請求項5記載の発明は、請求項1ないし4のいずれか1に記載の超音波洗浄装置に係り、上記第1の槽内で、上記開口部に近接対向する位置を通って、上記被洗浄物を液中搬送する搬送手段をさらに備えてなると共に、上記被洗浄物は、上記搬送手段に搬送されて、上記開口部に上記近接対向する位置を通過する際に、上記開口部から流出する上記噴流に晒されながら、同開口部から照射される上記超音波の作用を受けるように構成されていることを特徴としている。 Further, the invention according to claim 5 relates to the ultrasonic cleaning apparatus according to any one of claims 1 to 4, wherein in the first tank, through a position closely facing the opening, the The object to be cleaned is further provided with transport means for transporting the object to be cleaned in the liquid, and the object to be cleaned is transported by the transport means, and the object to be cleaned is transported from the opening when passing through the position facing the opening. It is characterized in that it is configured to receive the action of the ultrasonic wave emitted from the opening while being exposed to the flowing jet.

また、請求項6記載の発明は、請求項1ないし5のいずれか1に記載の超音波洗浄装置に係り、超音波洗浄処理を終えて上記第1の槽内の洗浄液の液中から大気中に出された上記被洗浄物に対して、上記第1の槽内の上記洗浄液を高圧で噴射して仕上げ洗浄処理するための高圧洗浄手段がさらに付加されていることを特徴としている。 The invention according to claim 6 relates to the ultrasonic cleaning apparatus according to any one of claims 1 to 5, wherein after the ultrasonic cleaning process is completed, the cleaning liquid in the first tank is released into the atmosphere. high-pressure cleaning means is further added for finishing cleaning by injecting the cleaning liquid in the first tank at high pressure onto the object to be cleaned taken out.

この発明の構成によれば、被洗浄物の表面に付着する残滓や汚れは、第2の槽の開口部から照射される超音波の洗浄作用によって、被洗浄物の表面から剥離して除去されると、同開口部から流出する噴流の勢いによって、超音波の作用域及びその近傍から迅速に排出されるので、残滓や汚れなどの超音波剥離物の被洗浄物への再付着を阻止又は軽減することができ、これにより、超音波洗浄能力を一段と向上させることができる。 According to the configuration of the present invention, the residue and dirt adhering to the surface of the object to be cleaned are peeled off and removed from the surface of the object to be cleaned by the cleaning action of the ultrasonic waves irradiated from the opening of the second tank. Then, due to the momentum of the jet flowing out from the same opening, it is quickly discharged from the action area and its vicinity of the ultrasonic wave, so that the re-adhesion of the ultrasonically removed matter such as residue and dirt to the object to be cleaned is prevented or can be reduced, thereby further improving the ultrasonic cleaning performance.

また、この発明の構成によれば、被洗浄物の表裏面とも、冷却媒体としての洗浄液の液中で、超音波の洗浄作用を受けるので、被洗浄物の裏面側に対しても熱損傷を防止でき、したがって、安心安全に洗浄することができる。 In addition, according to the structure of the present invention, both the front and back surfaces of the object to be cleaned are subjected to the ultrasonic cleaning action in the cleaning liquid as the cooling medium, so that the back surface of the object to be cleaned is not thermally damaged. can be prevented and therefore can be safely cleaned.

この発明の第1の実施形態である超音波洗浄装置の概略構成を示す模式的な垂直断面図である。1 is a schematic vertical sectional view showing a schematic configuration of an ultrasonic cleaning apparatus according to a first embodiment of the invention; FIG. 同超音波洗浄装置の概略構成を示す模式的な平面図であるFIG. 2 is a schematic plan view showing a schematic configuration of the same ultrasonic cleaning apparatus; この発明の第2の実施形態である超音波洗浄装置の概略構成を示す模式的な垂直断面図である。FIG. 2 is a schematic vertical cross-sectional view showing a schematic configuration of an ultrasonic cleaning apparatus according to a second embodiment of the invention; 被洗浄物としてのフレキソ印版の概略構成を示す模式的な垂直断面図である。1 is a schematic vertical cross-sectional view showing a schematic configuration of a flexographic printing plate as an object to be cleaned; FIG. フレキソ印版の従来の洗浄方式を説明するための模式図である。FIG. 2 is a schematic diagram for explaining a conventional cleaning method for a flexographic printing plate;

以下、図面を参照して、この発明を実施するための形態(以下、実施形態という)について詳細に説明する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.

(実施形態1)
図1は、この発明の第1の実施形態であるフレキソ印版用の超音波洗浄装置の概略構成を示す模式的な垂直断面図、図2は、同超音波洗浄装置の概略構成を示す模式的な平面図、また、図3は、同実施形態に供される被洗浄物としてのフレキソ印版の概略構成を示す模式的な垂直断面図である。
(Embodiment 1)
FIG. 1 is a schematic vertical sectional view showing the schematic configuration of an ultrasonic cleaning apparatus for flexographic printing plates according to the first embodiment of the present invention, and FIG. 2 is a schematic diagram showing the schematic configuration of the ultrasonic cleaning apparatus. FIG. 3 is a schematic vertical cross-sectional view showing the schematic configuration of a flexographic printing plate as an object to be cleaned provided in the same embodiment.

この実施形態の超音波洗浄装置は、図1及び図2に示すように、使用済みのフレキソ印版100を超音波洗浄処理するための超音波洗浄装置1Aであって、洗浄液Lを収容し、フレキソ印版(以下、適宜、被洗浄物ともフレキソ印版ともいう)100を浸漬する洗浄槽(第1の槽)2と、洗浄槽2内の底部に槽内槽として固設され、超音波洗浄用の超音波照射設備を搭載する超音波槽(第2の槽)3と、超音波槽3の超音波照射設備を冷却すると共に、洗浄槽2と超音波槽3との間で洗浄液Lを循環させるための循環ポンプ(噴流発生手段)4と、被洗浄物100を縦方向(図1中左方向)に搬送する搬送手段5と、を有して構成されている。 As shown in FIGS. 1 and 2, the ultrasonic cleaning apparatus of this embodiment is an ultrasonic cleaning apparatus 1A for ultrasonically cleaning a used flexographic printing plate 100, containing a cleaning liquid L, A cleaning tank (first tank) 2 in which a flexographic printing plate (hereinafter also referred to as an object to be cleaned or a flexographic printing plate) 100 is immersed; An ultrasonic tank (second tank) 3 equipped with ultrasonic irradiation equipment for cleaning, cooling the ultrasonic irradiation equipment of the ultrasonic tank 3, and cleaning liquid L between the cleaning tank 2 and the ultrasonic tank 3 and a conveying means 5 for conveying the object to be cleaned 100 in the vertical direction (leftward in FIG. 1).

上記超音波槽3は、天井部31付きの横長箱型形状を有し、天井部31の縦方向中央部には、後述するように、超音波の照射口であると共に噴流Jの噴射口であるスリット状の開口部32が、横方向(図1中紙面垂直方向、図2中上下方向)に延設されている。この実施形態では、超音波槽3は、たとえば、縦方向寸法50~200mm、横方向寸法1,000~1,500mm、高さ寸法20~130mmに設定され、また、スリット状の開口部32は、たとえば、スリット幅0.5~3mm、スリット長1,000~1,500mmに形成されている。このように、この超音波洗浄装置1Aでは、洗浄槽2内に洗浄液Lを供給して、超音波槽(超音波照射設備)3をすっぽり洗浄液Lの液面下に沈めると、スリット状の開口部32を介して、上方の超音波槽3内の洗浄液Lと下方の洗浄槽2の洗浄液Lとの間が連通状態になるように構成されている。 The ultrasonic bath 3 has a horizontally long box shape with a ceiling portion 31. At the center of the ceiling portion 31 in the vertical direction, there is an ultrasonic irradiation port and a jet J jet port, as will be described later. A certain slit-shaped opening 32 extends in the lateral direction (vertical direction in FIG. 1, vertical direction in FIG. 2). In this embodiment, the ultrasonic bath 3 is set to have, for example, a vertical dimension of 50 to 200 mm, a horizontal dimension of 1,000 to 1,500 mm, and a height of 20 to 130 mm. For example, the slit width is 0.5 to 3 mm and the slit length is 1,000 to 1,500 mm. Thus, in this ultrasonic cleaning apparatus 1A, when the cleaning liquid L is supplied into the cleaning tank 2 and the ultrasonic tank (ultrasonic irradiation equipment) 3 is completely submerged under the liquid surface of the cleaning liquid L, a slit-shaped opening is formed. The cleaning liquid L in the upper ultrasonic bath 3 and the cleaning liquid L in the lower cleaning bath 2 are communicated through the portion 32 .

上記循環ポンプ4は、図1に示すように、洗浄液Lが、洗浄槽2→排出管41→循環ポンプ4→導入管42→超音波槽3(給液室35,35→スリット状の整流開口部36,36→超音波集中室34→スリット状の開口部32)→洗浄槽2の順路で流れる循環流路を形成する。ここで、循環ポンプ4の動力を適切に設定することで、スリット状の開口部32から流出する洗浄液Lは、所定の勢いの噴流Jとなって超音波槽3側から洗浄槽2側の洗浄液Lの液中(以下、単に、液中ともいう)へ噴出する仕組みとなっている。なお、必要に応じて、洗浄槽2と循環ポンプ4との間、あるいは、循環ポンプ4と超音波槽3との間に、残滓や汚れなどの異物を分離除去するための図示せぬフィルタ装置を設けるようにしても良い。 In the circulation pump 4, as shown in FIG. 1, the cleaning liquid L flows through the cleaning tank 2→discharge pipe 41→circulation pump 4→introduction pipe 42→ultrasonic bath 3 (liquid supply chambers 35, 35→slit-shaped rectifying openings). A circulation flow path is formed in the order of the parts 36, 36→the ultrasonic concentration chamber 34→the slit-shaped opening 32)→the cleaning tank 2. FIG. Here, by appropriately setting the power of the circulation pump 4, the cleaning liquid L flowing out from the slit-shaped opening 32 becomes a jet J with a predetermined momentum, and the cleaning liquid flows from the ultrasonic bath 3 side to the cleaning bath 2 side. It has a mechanism of ejecting into the liquid of L (hereinafter simply referred to as the liquid). If necessary, a filter device (not shown) is provided between the cleaning tank 2 and the circulation pump 4 or between the circulation pump 4 and the ultrasonic tank 3 to separate and remove foreign matter such as residue and dirt. may be provided.

さらに詳述すると、超音波槽3は、図1に示すように、後述するように、流れ規制部(流れ規制部材)として機能する天井部31と、該天井部31に位置して横方向に延在するスリット状の開口部(超音波の照射口・噴流の噴射口)32と、超音波槽3の底部に位置して、スリット状の開口部32と所定の距離を隔てて相対向する態様で横方向に延在して、被洗浄物100に超音波を照射して洗浄するための超音波照射部33と、超音波照射部33とスリット状の開口部32との間に配設され、被洗浄物100に対する超音波の照射効率を高めるための横長の超音波集中室(超音波集中手段)34と、該超音波集中室34の横方向両側に隣接する横長の給液室35,35と、超音波集中室34の横方向両側の下辺に位置して各給液室35を超音波集中室34に連通させるスリット状の整流開口部36,36とを有している。 More specifically, as shown in FIG. 1, the ultrasonic bath 3 includes a ceiling portion 31 functioning as a flow restricting portion (flow restricting member), and a ceiling portion 31 positioned in the lateral direction. An extending slit-shaped opening (irradiation port for ultrasonic waves/jet injection port) 32 is positioned at the bottom of the ultrasonic bath 3 and faces the slit-shaped opening 32 at a predetermined distance. and an ultrasonic irradiation unit 33 for irradiating and cleaning the object to be cleaned 100 with ultrasonic waves, and disposed between the ultrasonic irradiation unit 33 and the slit-shaped opening 32. A horizontally elongated ultrasonic concentrating chamber (ultrasonic concentrating means) 34 for increasing the efficiency of irradiating ultrasonic waves to the object 100 to be cleaned, and horizontally elongated liquid supply chambers 35 adjacent to both sides of the ultrasonic concentrating chamber 34 in the horizontal direction. , 35 , and slit-shaped rectifying openings 36 , 36 located at the lower sides of both sides of the ultrasonic wave concentration chamber 34 in the horizontal direction to connect each liquid supply chamber 35 to the ultrasonic wave concentration chamber 34 .

上記給液室35,35は、循環ポンプ4の作動によって導入管42から導入される洗浄液Lを貯留しつつ、スリット状の整流開口部36,36で、横方向全長に渡り、一様な流れに整えて、図1中左右両側から超音波集中室34に供給する。超音波集中室34の下端部に位置するスリット状の整流開口部36,36から超音波集中室34に導入された洗浄液Lは、速度分布が横方向に略一様な噴流Jとなって、洗浄槽2側の液中へ流出する。 The liquid supply chambers 35, 35 store the cleaning liquid L introduced from the introduction pipe 42 by the operation of the circulation pump 4, and the slit-shaped rectifying openings 36, 36 allow uniform flow over the entire length in the horizontal direction. and supplied to the ultrasonic concentration chamber 34 from both left and right sides in FIG. The cleaning liquid L introduced into the ultrasonic concentration chamber 34 from the slit-shaped rectifying openings 36, 36 located at the lower end of the ultrasonic concentration chamber 34 becomes a jet J having a substantially uniform velocity distribution in the lateral direction. It flows out into the liquid on the washing tank 2 side.

超音波照射部33は、複数の超音波素子の列状配列体であって、各超音波素子は、超音波振動子と振動板とを積層にした構造からなり、各超音波振動子が、図示せぬ超音波発振器に接続されて、たとえば、1~2MHz帯の周波数で発振を制御され、これによって、超音波振動子は超音波振動するから、振動板も超音波振動し、この振動板を介して、超音波集中室34に流入する洗浄液Lに超音波振動が付与される。具体的には、この実施形態の超音波照射部33は、総数60~100個の円形の超音波素子が、たとえば、2列千鳥状に横長に並置されて構成されている。 The ultrasonic irradiation unit 33 is a linear array of a plurality of ultrasonic elements, and each ultrasonic element has a structure in which an ultrasonic transducer and a diaphragm are laminated. It is connected to an ultrasonic oscillator (not shown) and controlled to oscillate at a frequency of, for example, 1 to 2 MHz band. , the cleaning liquid L flowing into the ultrasonic concentration chamber 34 is subjected to ultrasonic vibration. Specifically, the ultrasonic irradiation unit 33 of this embodiment is configured by arranging a total of 60 to 100 circular ultrasonic elements horizontally in two rows, for example, in a zigzag pattern.

上記超音波集中室34は、スリット状の整流開口部36,36から流入する洗浄液の流れに勢いを与えて噴流にするとともに、この噴流に、超音波振動の付与が集中するように、させて付与するために、両端開口で中空先細り(テーパ状)の形状を有している。このような形状によれば、超音波照射部33の各振動子の発振によって、振動板から洗浄液Lに付与された超音波が、先細りの上端側に向けて伝搬するにつれて、漸次集中度を増してゆくので、スリット状の開口部32からの高効率の超音波照射が可能となる。ここで、テーパ角(先細りの角度)は、10度以上90度以下に設定するのが好ましい。しかし、テーパ角は、上記範囲に限定されない。 The ultrasonic concentrating chamber 34 gives impetus to the flow of the cleaning liquid flowing from the slit-shaped rectifying openings 36, 36 to form a jet, and the ultrasonic vibration is concentrated on the jet. It has a hollow tapered shape with both ends open for application. According to such a shape, the ultrasonic waves imparted to the cleaning liquid L from the vibration plate due to the oscillation of each transducer of the ultrasonic irradiation unit 33 gradually increase in concentration as they propagate toward the tapered upper end side. Therefore, it becomes possible to irradiate ultrasonic waves from the slit-shaped opening 32 with high efficiency. Here, the taper angle (tapered angle) is preferably set to 10 degrees or more and 90 degrees or less. However, the taper angle is not limited to the above range.

次に、上記搬送手段5は、超音波洗浄処理時、被洗浄物100を、洗浄槽2内の液中を通って、図1中左方向に搬送するための設備であり、複数の搬送ローラ51,51,…と、被洗浄物100を洗浄槽2内の液中に搬入案内するための搬入ガイド手段52と、被洗浄物100を洗浄槽2内の液中から搬出案内するための搬出ガイド手段53と、各搬送ローラ51,51,…を回転駆動するための図示せぬ駆動部とを有している。 Next, the conveying means 5 is equipment for conveying the object to be cleaned 100 in the left direction in FIG. 51, 51, . . . , a carry-in guide means 52 for carrying in and guiding the object 100 to be cleaned into the liquid in the cleaning tank 2, and a carry-out for guiding the object 100 to be cleaned out of the liquid in the cleaning tank 2. It has a guide means 53 and a driving section (not shown) for rotating the conveying rollers 51, 51, . . .

上記搬入ガイド手段52は、洗浄液Lの液面を斜めに切って液中に入る下り傾斜の搬送路を挟む態様で、超音波洗浄処理前の被洗浄物100を支える下部ガイド部材52aと、同被洗浄物100を抑える上部ガイド部材52bとを対向配置して構成されている。同様に、上記搬出ガイド手段53は、洗浄液Lの液面を斜めに切って液外に出る上り傾斜の搬送路を挟む態様で、超音波洗浄処理後の被洗浄物100を支える下部ガイド部材53aと、同被洗浄物100を抑える上部ガイド部材53bとを対向配置して構成されている。この構成において、超音波洗浄処理時、被洗浄物100は、搬入ガイド手段52の案内で、表裏面とも完全に液面下に沈められ、この状態で、超音波照射設備を搭載する超音波槽3からの超音波洗浄処理を受けながら、搬送手段5によって液中搬送され、超音波洗浄処理が完了した後、搬出ガイド手段53の案内で、液外へ搬出される。 The carry-in guide means 52 cuts the liquid surface of the cleaning liquid L at an angle and sandwiches a downwardly inclined conveying path into the cleaning liquid L. An upper guide member 52b that holds down the object 100 to be cleaned is arranged opposite to the upper guide member 52b. Similarly, the carry-out guide means 53 has a lower guide member 53a that supports the object to be cleaned 100 after the ultrasonic cleaning process in a mode that cuts the liquid surface of the cleaning liquid L obliquely and sandwiches an upwardly inclined transport path leading out of the liquid. and an upper guide member 53b for holding down the object 100 to be cleaned are arranged to face each other. In this configuration, during the ultrasonic cleaning process, the object to be cleaned 100 is guided by the carry-in guide means 52 so that both the front and back surfaces are completely submerged under the liquid surface. While being subjected to the ultrasonic cleaning process from 3, it is transported in the liquid by the transporting means 5, and after the ultrasonic cleaning process is completed, it is transported out of the liquid under the guidance of the transport guide means 53.

この実施形態では、液中の搬送路は、被洗浄物100が、スリット状の開口部32及び隣接する天井部31に近接対向する状態で、スリット状の開口部32上を通過するように設定されている。ここで、被洗浄物100は、スリット状の開口部32と1~3mmの間隔をあけて搬送されるのが好ましいが、間隔は上記範囲に限定されない。これにより、被洗浄物100が、スリット状の開口部32を通過する際、スリット状の開口部32から流出する噴流に晒されながら、この噴流に付与された超音波の洗浄作用を受けることができる。なお、上記液中の搬送路は、主として、搬入ガイド手段52及び搬出ガイド手段53の設置高さ(深さ)を調整変更することで、設定可能であるが、被洗浄物100とスリット状の開口部32との間隙を調整するための間隙調整手段を別途独立に設けるようにしても良い。 In this embodiment, the transport path in the liquid is set so that the object to be cleaned 100 passes over the slit-shaped opening 32 while facing the slit-shaped opening 32 and the adjacent ceiling 31 in close proximity. It is Here, the object to be cleaned 100 is preferably conveyed with a gap of 1 to 3 mm from the slit-shaped opening 32, but the gap is not limited to the above range. As a result, when the object 100 to be cleaned passes through the slit-shaped opening 32, it is exposed to the jet flowing out from the slit-shaped opening 32, and is subjected to the cleaning action of the ultrasonic waves imparted to this jet. can. The transport path in the liquid can be set mainly by adjusting and changing the installation height (depth) of the carry-in guide means 52 and the carry-out guide means 53. A gap adjusting means for adjusting the gap with the opening 32 may be provided separately and independently.

次に、この実施形態において、上記天井部31は、単に、スリット状の開口部32や給液室35,35の構成部材としての役割を担うだけではなく、超音波洗浄処理時、スリット状の開口部32から噴出し、被洗浄物100に衝突した後の噴流F,Fの流れを規制して、被洗浄物100から超音波剥離した残滓や汚れなどの浮遊物の再付着を防止又は軽減するための面状の流れ規制部材として機能する(以下、適宜、天井部31のことを流れ規制部材31ともいう)。 Next, in this embodiment, the ceiling portion 31 not only serves as a constituent member of the slit-shaped opening 32 and the liquid supply chambers 35, 35, but also serves as a slit-shaped opening during ultrasonic cleaning. Regulating the flow of the jets F, F after spurting from the opening 32 and colliding with the object 100 to be cleaned, prevents or reduces reattachment of suspended matter such as residue and dirt ultrasonically separated from the object 100 to be cleaned. (hereinafter, the ceiling part 31 is also referred to as the flow regulating member 31 as appropriate).

天井部31が流れ規制部材31として機能する理由は、超音波洗浄処理時、被洗浄物100をスリット状の開口部32及び隣接する流れ規制部材31に近接して対向する領域を通過させる際に、被洗浄物100と流れ規制部材31との間隙に、スリット状の開口部32から噴出し、洗浄物100に衝突した後の(超音波剥離物を取り込んだ)噴流F,Fを、超音波振動の作用域及びその近傍(ひいては、樹脂凸版101,101,…の表面近域)から離れた比較的穏やかな液域へ、所定の勢いで排出する一時的排出流路が(スリット状の開口部32を境に図1中左右両側に)発生するためである。ここで、一時的排出流路の流れは、スリット状の開口部32から、噴流Jを噴出させる循環ポンプ4の動力によって生み出され、上述の循環流路の部分流路をなしている。 The reason why the ceiling portion 31 functions as the flow restricting member 31 is that when the object to be cleaned 100 is caused to pass through the slit-shaped opening 32 and the adjacent flow restricting member 31 in the vicinity of the flow restricting member 31 during the ultrasonic cleaning process. , the jets F, F after colliding with the cleaning object 100 (taking in the ultrasonically separated matter) are ejected from the slit-shaped opening 32 in the gap between the cleaning object 100 and the flow regulating member 31, and are ultrasonically generated. Temporary discharge passages (slit-shaped openings This is because it occurs on both the left and right sides in FIG. Here, the flow of the temporary discharge channel is generated by the power of the circulation pump 4 that ejects the jet J from the slit-shaped opening 32, and forms a partial channel of the above-described circulation channel.

この実施形態では、上記超音波槽3の構成部分のうち、超音波集中室34と天井部(流れ規制部材)31とは、次のように作られる。すなわち、一対の横長の金属板を、それぞれ鋭角に折曲連設して、図1に示すように、超音波集中室34と天井部31との図1中左半分を構成する第1の折曲連設板と、超音波集中室34と天井部31との図1中右半分を構成する第2の折曲連設板とを形成し、第1、第2の折曲連設板を、洗浄槽2の底部に、横方向に並置して、断面ハの字(テーパ)状の超音波集中室34を形成し、その際、第1、第2の折曲連設板の折曲部位同士を所定の隙間を隔てて相対峙させて、スリット状の開口部32と該開口部32を挟む左右両側の天井部(流れ規制部材)31とを得る。 In this embodiment, among the components of the ultrasonic bath 3, the ultrasonic concentration chamber 34 and the ceiling portion (flow restricting member) 31 are made as follows. That is, a pair of oblong metal plates are bent at an acute angle to form a first fold forming the left half of FIG. A curved connection plate and a second bending connection plate that constitutes the right half of FIG. At the bottom of the cleaning tank 2, an ultrasonic wave concentrating chamber 34 having a tapered cross section is formed side by side. A slit-shaped opening 32 and ceilings (flow regulating members) 31 on both left and right sides sandwiching the opening 32 are obtained by making the parts face each other with a predetermined gap therebetween.

次に、図1を参照して、フレキソ印版を超音波洗浄する際の上記構成の超音波洗浄装置1Aの動作について説明する。
洗浄槽2内に洗浄液(たとえば、アルカリ水溶液)Lを供給して、超音波槽(超音波照射設備)3をすっぽり洗浄液Lの液面下に沈めると、スリット状の開口部32を介して、上方の超音波槽3内の洗浄液Lと下方の洗浄槽2の洗浄液Lとの間が連通状態になる。さらに、完全に水没した状態でのフレキソ印版100の搬送が可能となるまで、洗浄槽2内に洗浄液Lを注入する。なお、洗浄液Lは、アルカリ水溶液に限定されない。
Next, referring to FIG. 1, the operation of the ultrasonic cleaning apparatus 1A configured as described above when ultrasonically cleaning a flexographic printing plate will be described.
When a cleaning liquid (for example, alkaline aqueous solution) L is supplied into the cleaning tank 2 and the ultrasonic bath (ultrasonic irradiation equipment) 3 is completely submerged under the liquid surface of the cleaning liquid L, through the slit-shaped opening 32, The cleaning liquid L in the upper ultrasonic bath 3 and the cleaning liquid L in the lower cleaning bath 2 are in communication. Further, the cleaning liquid L is injected into the cleaning tank 2 until the flexographic printing plate 100 can be transported in a completely submerged state. Note that the cleaning liquid L is not limited to the alkaline aqueous solution.

次に、循環ポンプ4を駆動して、洗浄液Lが、洗浄槽2→排出管41→循環ポンプ4→導入管42→超音波槽3(給液室35,35→スリット状の整流開口部36,36→超音波集中室34→スリット状の開口部32)→洗浄槽2の順路で流れる循環流路を発生させる。これに加えて、超音波発振器をオンとして、たとえば、1~2MHzの交流電圧を発生させ、発生した交流電圧を各超音波振動子(超音波照射部33の構成部分)に印加して、各振動板(同構成部分)を超音波振動させる。 Next, by driving the circulation pump 4, the cleaning liquid L is transferred from the cleaning tank 2→discharge pipe 41→circulation pump 4→introduction pipe 42→ultrasonic bath 3 (liquid supply chambers 35, 35→slit-shaped rectifying opening 36). , 36→ultrasonic concentration chamber 34→slit-shaped opening 32)→cleaning tank 2). In addition to this, the ultrasonic oscillator is turned on, for example, an AC voltage of 1 to 2 MHz is generated, and the generated AC voltage is applied to each ultrasonic transducer (constituent part of the ultrasonic irradiation unit 33), and each The diaphragm (same component) is ultrasonically vibrated.

上記循環流路において、超音波槽3では、給液室35,35が、導入管42から導入される洗浄液Lを貯留しつつ、スリット状の整流開口部36,36で、横方向全長に渡り、流れを一様に整えて、図1中左右両側から超音波集中室34に供給する。超音波集中室34に導入された洗浄液Lは、超音波振動中の超音波照射部(超音波振動子、振動板)33を冷却すると共に、各振動板から、超音波振動を付与される。各振動板から洗浄液Lに付与された超音波振動は、噴流Jとなる洗浄液Lを伝達媒体として、超音波集中室34の先細りの上端部側(狭くなる領域)に向かって伝搬するにつれて、漸次集中し、結果、噴流Jは、照射効率の高い集中超音波振動を付与された状態で、スリット状の開口部32から、速度分布が横方向に略一様な勢いで、洗浄槽2側の液中へ噴出し続ける。 In the circulation flow path, in the ultrasonic bath 3, the cleaning liquid L introduced from the introduction pipe 42 is stored in the liquid supply chambers 35, 35, and the slit-shaped rectifying openings 36, 36 extend the entire length in the horizontal direction. , the flow is uniformly adjusted and supplied to the ultrasonic concentration chamber 34 from both the left and right sides in FIG. The cleaning liquid L introduced into the ultrasonic concentration chamber 34 cools the ultrasonic irradiation unit (ultrasonic oscillator, diaphragm) 33 during ultrasonic vibration, and ultrasonic vibration is imparted from each diaphragm. The ultrasonic vibration imparted to the cleaning liquid L from each vibration plate gradually propagates toward the tapered upper end side (the narrowed region) of the ultrasonic concentration chamber 34 using the cleaning liquid L as a jet J as a transmission medium. As a result, the jet stream J is applied with concentrated ultrasonic vibration with high irradiation efficiency, and the jet stream J moves toward the cleaning tank 2 side from the slit-shaped opening 32 with a momentum with a substantially uniform velocity distribution in the horizontal direction. Continue to squirt into the liquid.

搬送手段5によって搬送ローラ51,51が駆動され、これに伴い、可撓性のフレキソ印版100が、主たる洗浄対象部分である樹脂凸版101,101,…の表面を図1中下向きにして、搬入ガイド手段52の案内で、洗浄槽2内の液中にS字状に湾曲して搬入され、表裏面とも洗浄液Lの液面下に浸漬される。洗浄液Lに浸漬されたフレキソ印版100(とりわけ、樹脂凸版101,101,…)は、スリット状の開口部32及び隣接する流れ規制部材(天井部)31に近接して対向する態様で、横長のスリット状の開口部32に直交する方向(図1,2中右方向から左方向)に搬送される。ここで、近接とは、フレキソ印版100(とりわけ、樹脂凸版101,101,…)が、スリット状の開口部32から流出する噴流Jの影響を受けることができる間隙範囲をいう。 The conveying rollers 51, 51 are driven by the conveying means 5, and accordingly, the flexible flexographic printing plate 100 turns the surfaces of the resin relief printing plates 101, 101, . Guided by the carry-in guide means 52, it is carried into the cleaning tank 2 in an S-shaped curve, and both the front and back surfaces are immersed in the cleaning liquid L below the liquid level. The flexographic printing plate 100 (in particular, the resin relief printing plates 101, 101, . 1 and 2 (from right to left in FIGS. 1 and 2). Here, proximity means a gap range in which the flexographic printing plate 100 (in particular, the resin relief printing plates 101, 101, .

この搬送工程で、フレキソ印版100(とりわけ、樹脂凸版101,101,…)は、スリット状の開口部32を横切る際、線順次で、スリット状の開口部32から流出する(超音波振動を付与された)洗浄液Lの噴流Jの衝突を受けて、超音波洗浄されながら、搬送される。フレキソ印版100(樹脂凸版101,101,…)が、この噴流Jの衝突を受ける間、噴流Jを媒体として照射される超音波振動の洗浄作用によって、表面にこびりついているインクの残滓や汚れRが剥離し除去される。このようにして超音波剥離されたインクの残滓や汚れRは、フレキソ印版100(樹脂凸版101,101,…)に衝突後の噴流F,Fに取り込まれる。 In this conveying process, the flexographic printing plate 100 (in particular, the resin relief printing plates 101, 101, . It is transported while being subjected to ultrasonic cleaning by being hit by a jet J of the cleaning liquid L applied thereto. While the flexographic printing plate 100 (resin relief printing plates 101, 101, . . . ) is impacted by the jet J, the cleaning action of the ultrasonic vibration irradiated with the jet J as a medium removes ink residues and dirt adhering to the surface. R is peeled off and removed. The ink residue and dirt R ultrasonically separated in this manner are taken into the jets F, F after colliding with the flexo printing plate 100 (the resin relief plates 101, 101, . . . ).

ここで、フレキソ印版100(樹脂凸版101,101,…)と流れ規制部材31との間の間隙が、間隙区間が存在する限りにおいて、超音波剥離物(インクの残滓や汚れR)を取り込んだ衝突後の噴流F,Fの一時的排出流路となる。したがって、衝突後の噴流F,Fは、超音波剥離物を、超音波振動の洗浄作用領域及びその近傍(ひいては、樹脂凸版101,101,…の表面近域)から離れた、比較的穏やかな液域へ迅速に輸送するための排出媒体としてふるまう、ということができる。 Here, the gap between the flexographic printing plate 100 (resin letterpress 101, 101, . However, it becomes a temporary discharge flow path for the jets F, F after the collision. Therefore, the jets F, F after the collision move the ultrasonically separated matter away from the cleaning action area of the ultrasonic vibration and the vicinity thereof (and the vicinity of the surfaces of the resin relief plates 101, 101, . . . It can be said to act as an evacuation medium for rapid transport to the liquid body.

この一時的排出流路は、直上のフレキソ印版100とスリット状の開口部32との近接距離が、ある程度短いほど、流速が早まり、超音波剥離物を比較的平穏な液域に向かって迅速に排出できる。なお、この実施形態では、樹脂凸版101,101,…とスリット状の開口部32及び隣接する流れ規制部材(天井部)31との間隔を、1~3mmに設定したが、この種の好適な間隔寸法は、各種条件・各種環境・被洗浄物の種類などによって異なるものあるので、上記間隔範囲に限定されない。 In this temporary discharge channel, the shorter the proximity distance between the flexographic printing plate 100 directly above and the slit-shaped opening 32 to some extent, the faster the flow speed, and the more quickly the ultrasonically separated material moves toward a relatively calm liquid region. can be discharged to In this embodiment, the distance between the resin relief plates 101, 101, . The interval dimension is not limited to the above interval range because it varies depending on various conditions, various environments, types of objects to be cleaned, and the like.

超音波洗浄処理後のフレキソ印版100(樹脂凸版101,101,…)は、搬送ローラ51,51によって、図1中左方に示すよう、搬出ガイド手段53の案内の下で、洗浄液Lの液外へ逆S字状に湾曲して搬出される。 The flexographic printing plate 100 (resin letterpress 101, 101, . . . ) after the ultrasonic cleaning process is transported by the conveying rollers 51, 51 under the guidance of the carry-out guide means 53 as shown on the left side in FIG. It is carried out in an inverted S-shaped curve to the outside of the liquid.

上記構成によれば、フレキソ印版100(樹脂凸版101,101,…)に付着する残滓や汚れRは、超音波槽3のスリット状の開口部32から照射される超音波振動の洗浄作用によって、フレキソ印版100(樹脂凸版101,101,…)の表面から剥離して除去されると、スリット状の開口部32から流出する噴流Jの勢いによって、超音波振動の洗浄作用領域及びその近傍(ひいては、樹脂凸版101,101,…の表面近域)から離れた比較的穏やかな液域へ迅速に排出されるので、超音波剥離物のフレキソ印版100への再付着を阻止又は軽減することができ、これにより、超音波洗浄性能を一段と向上させることができる。 According to the above configuration, the residue and dirt R adhering to the flexographic printing plate 100 (resin letterpress 101, 101, . , is peeled off and removed from the surface of the flexographic printing plate 100 (resin letterpress 101, 101, . Since it is quickly discharged to a relatively calm liquid area away from (and near the surface of the resin letterpress 101, 101, . Therefore, the ultrasonic cleaning performance can be further improved.

また、フレキソ印版100の表裏面とも、冷却媒体としての洗浄液Lの液中で、超音波の洗浄作用を受けるので、フレキソ印版100(キャリア用フィルム102)の裏面側に対しても熱損傷を防止でき、したがって、安心安全に洗浄することができる。 In addition, since both the front and back surfaces of the flexographic printing plate 100 are subjected to ultrasonic cleaning action in the cleaning liquid L as a cooling medium, the back surface of the flexographic printing plate 100 (carrier film 102) is also thermally damaged. can be prevented, and therefore safe and secure cleaning is possible.

(実施形態2)
図3は、この発明の第2の実施形態である超音波洗浄装置の概略構成を示す模式的な垂直断面図である。
この第2の実施形態の超音波洗浄装置1Bが、第1の実施形態の超音波洗浄装置1Aと大きく異なるところは、超音波洗浄装置1Bには、図3に示すように、超音波洗浄済みのフレキソ印版100(樹脂凸版101,101,…)に対して、仕上げ洗浄として、洗浄槽2内の同じ洗浄液Lで高圧噴射洗浄するための高圧洗浄設備(高圧洗浄手段)6が付加されている点である。図3において、図1の構成部分と同一の各部については、同一の符号を付して、その説明を省略又は簡略化する。
上記高圧洗浄設備6は、図3に示すように、高圧の洗浄液Lを供給するための高圧ポンプ61と、フレキソ印版100の搬出方向と直交する方向(図3中紙面垂直方向)に延びる高圧の洗浄液Lを噴出するスリット状のノズル62と、送液管63と、還流管64と、還流される洗浄液Lをろ過するためのフィルタ装置65とを備えている。
上記構成において、超音波洗浄処理後のフレキソ印版100(樹脂凸版101,101,…)が、搬送ローラ51,51によって、搬出ガイド手段53の案内の下で、洗浄液Lの液外へ引き上げられると、すぐに、スリット状のノズル62から噴出される高圧の洗浄液Lによって、さらなる洗浄処理を受ける。
(Embodiment 2)
FIG. 3 is a schematic vertical sectional view showing a schematic configuration of an ultrasonic cleaning apparatus according to a second embodiment of the invention.
The ultrasonic cleaning apparatus 1B of the second embodiment is greatly different from the ultrasonic cleaning apparatus 1A of the first embodiment in that, as shown in FIG. A high-pressure washing facility (high-pressure washing means) 6 is added for high-pressure jet washing with the same washing liquid L in the washing tank 2 as finish washing for the flexographic printing plates 100 (resin relief printing plates 101, 101, . . . ). This is the point. In FIG. 3, the same reference numerals are assigned to the same parts as those in FIG. 1, and the description thereof will be omitted or simplified.
As shown in FIG. 3, the high-pressure cleaning equipment 6 includes a high-pressure pump 61 for supplying a high-pressure cleaning liquid L, and a high-pressure pump 61 extending in a direction perpendicular to the carrying-out direction of the flexographic printing plate 100 (perpendicular to the paper surface in FIG. 3). , a slit-shaped nozzle 62 for ejecting the washing liquid L, a liquid feeding pipe 63, a reflux pipe 64, and a filter device 65 for filtering the washing liquid L to be returned.
In the above configuration, the flexographic printing plate 100 (resin letterpress 101, 101, . . . ) after ultrasonic cleaning is lifted out of the cleaning liquid L by the transport rollers 51, 51 under the guidance of the carry-out guide means 53. Immediately after that, the high-pressure cleaning liquid L ejected from the slit-shaped nozzle 62 is subjected to further cleaning processing.

この第2の実施形態によれば、超音波洗浄処理工程の後でも、もしも、フレキソ印版100に再付着物が付いていれば、それを再度除去できる機会が設けられているので、超音波洗浄性能をさらに一段と向上させることができる。 According to this second embodiment, even after the ultrasonic cleaning process, if there is re-deposited matter on the flexographic printing plate 100, there is provided an opportunity to remove it again. Cleaning performance can be further improved.

以上、この発明の実施形態を図面を参照して詳述してきたが、具体的な構成はこの実施形態に限られるものではなく、この発明の要旨を逸脱しない範囲の設計の変更等があってもこの発明に含まれる。たとえば、装置各部の寸法、隙間間隔、形状、材質、個数、設置位置、配列、及び、超音波の発振周波数などは、必要に応じて、増減変更できる。たとえば、超音波照射部33は、円形の超音波素子が、2列千鳥状に配列されて構成されるようにしたが、円形の超音波素子に限らず、矩形又は帯状の超音波素子でも良く、また、超音波素子の個数配列は、2列千鳥状に限らず、1列又は3列に配列しても良く、単数の超音波素子から構成しても良い。洗浄液Lの種類もアルカリ水溶液に限定されない。 Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and design modifications and the like are possible without departing from the gist of the present invention. is also included in this invention. For example, the dimensions, gaps, shapes, materials, numbers, installation positions, arrangements, and oscillation frequencies of ultrasonic waves can be increased or decreased as needed. For example, although the ultrasonic irradiation unit 33 is configured by arranging circular ultrasonic elements in a zigzag pattern in two rows, the ultrasonic elements are not limited to circular ultrasonic elements, and may be rectangular or band-shaped ultrasonic elements. Also, the arrangement of the number of ultrasonic elements is not limited to the two-row staggered pattern, but may be arranged in one or three rows, or may be composed of a single ultrasonic element. The type of cleaning liquid L is also not limited to the alkaline aqueous solution.

また、上述の実施形態では、超音波の照射口で噴流Jの噴射口として、スリット状の開口部を用いたが、これに限らず、必要に応じて、たとえば、円形、矩形、帯状など、どのような形状の開口部でも、この発明の範囲に含まれる。 In the above-described embodiment, a slit-shaped opening is used as the injection port for the jet J at the ultrasonic irradiation port. Any shape of opening is within the scope of this invention.

また、上述の実施形態では、被洗浄物100が、スリット状の開口部32と流れ規制部材31とに面対向に近接する状態で超音波洗浄処理を行う場合について述べたが、スリット状の開口部32から噴出する噴流Jに勢いがあり、この勢いで、超音波剥離物が遠くへ流される槽内環境の下では、必ずしも、近接状態で対向させる必要はなく、流れ規制部材31そのものを省略することもできる。また、上述の実施形態では、超音波洗浄槽3を洗浄槽2内の底部に設けるようにしたが、必要に応じて、側壁部に取り付けても良く、スリット状の開口部32を下向きにして、洗浄槽2の上方に設けるようにしても良く、あるいは、洗浄槽2の底面からスリット状の開口部32だけが洗浄槽2内を望むことができるようにすれば、外付けも可能である。 In the above-described embodiment, the ultrasonic cleaning process is performed while the object 100 to be cleaned is adjacent to the slit-shaped opening 32 and the flow regulating member 31 so as to be face-to-face. The jet J ejected from the part 32 has momentum, and under the environment in the tank where the ultrasonically separated material is flowed far away by this momentum, it is not necessary to face each other in a close state, and the flow restricting member 31 itself is omitted. You can also In the above-described embodiment, the ultrasonic cleaning tank 3 is provided at the bottom of the cleaning tank 2, but if necessary, it may be attached to the side wall, with the slit-shaped opening 32 facing downward. It may be provided above the cleaning tank 2, or it may be attached externally if only the slit-shaped opening 32 can be seen from the bottom of the cleaning tank 2 into the cleaning tank 2. .

また、洗浄槽2の洗浄液Lを排出する排出管41は、図1中右方だけでなく、左方にも設けるようにしても良い。また、洗浄槽2の液中に搬送ローラを設置して、被洗浄物を液中に案内するガイド機能を担うようにしても良い。 Further, the discharge pipe 41 for discharging the cleaning liquid L from the cleaning tank 2 may be provided not only on the right side in FIG. 1, but also on the left side. Further, a conveying roller may be installed in the liquid of the cleaning tank 2 so as to have a guiding function of guiding the object to be cleaned into the liquid.

また、上述の第2の実施形態では、超音波洗浄処理後の仕上げ用として、被洗浄物100を高圧噴射洗浄するための高圧洗浄設備6を設けるようにしたが、後工程に代えて、超音波洗浄処理の前処理用に設けても良く。超音波洗浄工程の前工程と後工程との両方に用いるようにしても良い。 In addition, in the above-described second embodiment, the high-pressure cleaning equipment 6 for high-pressure jet cleaning of the object to be cleaned 100 is provided for finishing after the ultrasonic cleaning treatment. It may be provided for pretreatment of sonic cleaning treatment. It may be used in both the pre-process and the post-process of the ultrasonic cleaning process.

この発明は、被洗浄物として、フレキソ印版に限定されるものではなく、他の可撓性の樹脂成型体の超音波洗浄にも好適に適用でき、さらには、非可撓性の樹脂成型品、ガラス基板、半導体基板及び金属部材などの超音波洗浄にも適用することができる。 The object to be cleaned is not limited to flexographic printing plates, but can be suitably applied to ultrasonic cleaning of other flexible resin moldings. It can also be applied to ultrasonic cleaning of products, glass substrates, semiconductor substrates, metal members, and the like.

1A,1B 超音波洗浄装置
2 洗浄槽(第1の槽)
3 超音波槽(第2の槽)
31 天井部、流れ規制部(流れ規制部材)
32 スリット状の開口部
33 超音波照射部(超音波照射手段)
34 超音波集中室(超音波集中手段)
4 循環ポンプ(噴流発生手段)
5 搬送手段
51 搬送ローラ
52 搬入ガイド手段
53 搬出ガイド手段
6 高圧洗浄設備(高圧洗浄手段)
100 フレキソ印版(被洗浄物)
101 樹脂凸版
102 キャリア用フィルム
L 洗浄液
J 噴流
F 衝突後の噴流
1A, 1B ultrasonic cleaning device 2 cleaning tank (first tank)
3 Ultrasonic bath (second bath)
31 ceiling part, flow restricting part (flow restricting member)
32 slit-shaped opening 33 ultrasonic irradiation unit (ultrasonic irradiation means)
34 Ultrasound Concentration Chamber (Ultrasound Concentration Means)
4 circulation pump (jet generation means)
5 conveying means 51 conveying roller 52 carry-in guide means 53 carry-out guide means 6 high-pressure washing equipment (high-pressure washing means)
100 Flexo printing plate (object to be cleaned)
101 resin letterpress 102 carrier film L cleaning liquid J jet F jet after collision

上記課題を解決するために、請求項1記載の発明は、洗浄液が収容された洗浄槽内において、前記洗浄液の液中に浸漬された状態の被洗浄物に対して超音波洗浄を行う超音波洗浄装置に係り、超音波を付与された洗浄液の噴流の供給を受けて、前記被洗浄物に対して、前記超音波洗浄を行う場を提供する浅底の槽域と、該浅底の槽域内で前記被洗浄物の超音波洗浄に供せられた使用後の洗浄液を収容する深底の槽域とを有する前記洗浄槽と、前記浅底の槽域の底部に穿設され、前記浅底の槽域内の液中に浸漬された前記被洗浄物に向けて、前記超音波を付与された前記洗浄液の噴流を噴射する開口部と、前記噴流に用いられる前記洗浄液を収容すると共に、前記開口部から噴射される前記洗浄液の噴流に前記超音波を付与する超音波照射設備を備える、天井部付きの超音波槽と、該超音波槽内の前記洗浄液に流動力を与えて、前記開口部から前記浅底の槽域内に、前記超音波を付与された前記洗浄液の前記噴流を噴射させ、前記被洗浄物に衝突させる噴流発生手段と、前記深底の槽域に収容された前記使用後の洗浄液を排出するための排出部と、を備えてなると共に、前記超音波槽の上部に位置する前記天井部の上面が、前記浅底の槽域の底面をなすように構成されていると共に、前記天井部に穿設された開口部によって、前記浅底の槽域の底部に穿設されている前記開口部が構成されていることを特徴としている。 In order to solve the above-mentioned problems, the invention according to claim 1 provides an ultrasonic cleaning apparatus for ultrasonically cleaning an object to be cleaned immersed in the cleaning liquid in a cleaning tank containing the cleaning liquid. A shallow tank area for receiving a jet of ultrasonically-applied cleaning liquid and providing a place for performing the ultrasonic cleaning on the object to be cleaned, and the shallow tank. a cleaning tank having a deep tank area for containing a used cleaning liquid that has been subjected to ultrasonic cleaning of the object to be cleaned in the area; an opening for injecting a jet of the cleaning liquid to which the ultrasonic wave is applied toward the object to be cleaned immersed in the liquid in the bottom bath area; An ultrasonic tank with a ceiling, which is equipped with ultrasonic irradiation equipment for applying ultrasonic waves to a jet of the cleaning liquid jetted from an opening, and a fluidity force is applied to the cleaning liquid in the ultrasonic tank to control the opening. a jet generating means for injecting the jet of the cleaning liquid to which the ultrasonic wave is imparted from a part into the shallow bath region and colliding with the object to be cleaned; and the use housed in the deep bath region. and a discharge part for discharging the cleaning liquid afterward, and the top surface of the ceiling part located above the ultrasonic bath is configured to form the bottom surface of the shallow bath area. In addition, the opening formed in the bottom of the shallow tank area is constituted by the opening formed in the ceiling .

また、請求項2記載の発明は、請求項1記載の超音波洗浄装置に係り、前記被洗浄物と前記浅底の槽域の底面である前記天井部の上面との間隙を調整して狭めることで、当該間隙を前記深底の槽域側に向かって流れる前記使用後の洗浄液の流速を速める構成になされていることを特徴としている。 Further, the invention according to claim 2 relates to the ultrasonic cleaning apparatus according to claim 1, wherein the gap between the object to be cleaned and the upper surface of the ceiling which is the bottom surface of the shallow tank area is adjusted and narrowed. As a result, the flow rate of the used cleaning liquid flowing through the gap toward the deep tank region is increased.

請求項3記載の発明は、請求項1又は2記載の超音波洗浄装置に係り、前記被洗浄物と前記浅底の槽域の底面である前記天井部の上面との間隙が、1~3mmに設定されていることを特徴としている。 The invention according to claim 3 relates to the ultrasonic cleaning apparatus according to claim 1 or 2, wherein the gap between the object to be cleaned and the upper surface of the ceiling that is the bottom surface of the shallow tank area is 1 to 3 mm. It is characterized by being set to

また、請求項4記載の発明は、請求項1、2又は3記載の超音波洗浄装置に係り、前記被洗浄物が、搬送手段によって、前記浅底の槽域内を所定の方向に液中搬送され、前記開口部の直上を通過する際に、前記超音波を付与された前記洗浄液の噴流の衝突を受けて、前記超音波洗浄が行われる構成になされていることを特徴としている。 The invention according to claim 4 relates to the ultrasonic cleaning apparatus according to claim 1, 2 or 3, wherein the object to be cleaned is submerged and conveyed in a predetermined direction in the shallow tank area by a conveying means. and when passing directly above the opening, the ultrasonic cleaning is performed by being hit by the jet of the cleaning liquid to which the ultrasonic waves are applied.

また、請求項5記載の発明は、請求項4記載の超音波洗浄装置に係り、前記開口部が、前記浅底の槽域の底面に、前記所定の方向と交差する方向に延設されたスリット状の開口部であることを特徴としている。 The invention according to claim 5 relates to the ultrasonic cleaning apparatus according to claim 4 , wherein the opening is provided on the bottom surface of the shallow bath area in a direction intersecting with the predetermined direction. It is characterized by a slit-shaped opening .

また、請求項6記載の発明は、請求項1ないし5のいずれか1に記載の超音波洗浄装置に係り、前記超音波洗浄を終えて、前記洗浄槽内の洗浄液の液中から大気中に出された前記被洗浄物に対して、前記洗浄槽内の前記洗浄液を高圧で噴射して仕上げ洗浄をするための高圧洗浄手段がさらに付加されていることを特徴としている。 Further, the invention according to claim 6 relates to the ultrasonic cleaning apparatus according to any one of claims 1 to 5, wherein after the ultrasonic cleaning is completed , the cleaning liquid in the cleaning tank is released into the atmosphere. A high-pressure washing means is further added for finishing washing by injecting the washing liquid in the washing tank at a high pressure to the objects to be washed which have been taken out.

この発明の構成によれば、被洗浄物の表面に付着する残滓や汚れは、超音波槽の開口部から照射される超音波の洗浄作用によって、被洗浄物の表面から剥離して除去されると、同開口部から流出する噴流の勢いによって、超音波の作用域及びその近傍から迅速に排出されるので、残滓や汚れなどの超音波剥離物の被洗浄物への再付着を阻止又は軽減することができ、これにより、超音波洗浄能力を一段と向上させることができる。 According to the configuration of the present invention, the residue and dirt adhering to the surface of the object to be cleaned are peeled off and removed from the surface of the object to be cleaned by the cleaning action of the ultrasonic waves emitted from the opening of the ultrasonic bath . And, by the force of the jet flowing out from the same opening, it is quickly discharged from the action area and its vicinity of the ultrasonic wave, so that the re-adhesion of the ultrasonically removed matter such as residue and dirt to the object to be cleaned is prevented or reduced. It is possible to further improve the ultrasonic cleaning performance.

この実施形態の超音波洗浄装置は、図1及び図2に示すように、使用済みのフレキソ印版100を超音波洗浄処理するための超音波洗浄装置1Aであって、洗浄液Lを収容し、フレキソ印版(以下、適宜、被洗浄物ともフレキソ印版ともいう)100を浸漬する洗浄槽2と、洗浄槽2内の底部に槽内槽として固設され、超音波洗浄用の超音波照射設備を搭載する超音波槽3と、超音波槽3の超音波照射設備を冷却すると共に、洗浄槽2と超音波槽3との間で洗浄液Lを循環させるための循環ポンプ(噴流発生手段)4と、被洗浄物100を縦方向(図1中左方向)に搬送する搬送手段5と、を有して構成されている。 As shown in FIGS. 1 and 2, the ultrasonic cleaning apparatus of this embodiment is an ultrasonic cleaning apparatus 1A for ultrasonically cleaning a used flexographic printing plate 100, containing a cleaning liquid L, A cleaning tank 2 in which a flexographic printing plate (hereinafter also referred to as an object to be cleaned or a flexographic printing plate) 100 is immersed; A circulation pump (jet generating means) for cooling the ultrasonic tank 3 in which the equipment is mounted and the ultrasonic irradiation equipment of the ultrasonic tank 3, and for circulating the cleaning liquid L between the cleaning tank 2 and the ultrasonic tank 3. 4 and conveying means 5 for conveying the object to be cleaned 100 in the vertical direction (left direction in FIG. 1).

上記超音波槽3は、天井部31付きの横長箱型形状を有し、天井部31の縦方向中央部には、後述するように、超音波の照射口であると共に噴流Jの噴射口であるスリット状の開口部32が、横方向(図1中紙面垂直方向、図2中上下方向)に延設されている。この実施形態では、超音波槽3は、たとえば、縦方向寸法50~200mm、横方向寸法1,000~1,500mm、高さ寸法20~130mmに設定され、また、スリット状の開口部32は、たとえば、スリット幅0.5~3mm、スリット長1,000~1,500mmに形成されている。このように、この超音波洗浄装置1Aでは、洗浄槽2内に洗浄液Lを供給して、超音波槽(超音波照射設備)3をすっぽり洗浄液Lの液面下に沈めると、スリット状の開口部32を介して、下方の超音波槽3内の洗浄液Lと上方の洗浄槽2の洗浄液Lとの間が連通状態になるように構成されている。 The ultrasonic bath 3 has a horizontally long box shape with a ceiling portion 31. At the center of the ceiling portion 31 in the vertical direction, there is an ultrasonic irradiation port and a jet J jet port, as will be described later. A certain slit-shaped opening 32 extends in the lateral direction (vertical direction in FIG. 1, vertical direction in FIG. 2). In this embodiment, the ultrasonic bath 3 is set to have, for example, a vertical dimension of 50 to 200 mm, a horizontal dimension of 1,000 to 1,500 mm, and a height of 20 to 130 mm. For example, the slit width is 0.5 to 3 mm and the slit length is 1,000 to 1,500 mm. Thus, in this ultrasonic cleaning apparatus 1A, when the cleaning liquid L is supplied into the cleaning tank 2 and the ultrasonic tank (ultrasonic irradiation equipment) 3 is completely submerged under the liquid surface of the cleaning liquid L, a slit-shaped opening is formed. The cleaning liquid L in the lower ultrasonic bath 3 and the cleaning liquid L in the upper cleaning bath 2 are communicated through the portion 32 .

上記超音波集中室34は、スリット状の整流開口部36,36から流入する洗浄液の流れに勢いを与えて噴流にするとともに、この噴流に、超音波振動を集中して付与するために、両端開口で中空先細り(テーパ状)の形状を有している。このような形状によれば、超音波照射部33の各振動子の発振によって、振動板から洗浄液Lに付与された超音波が、先細りの上端側に向けて伝搬するにつれて、漸次集中度を増してゆくので、スリット状の開口部32からの高効率の超音波照射が可能となる。ここで、テーパ角(先細りの角度)は、10度以上90度以下に設定するのが好ましい。しかし、テーパ角は、上記範囲に限定されない。 The ultrasonic concentrating chamber 34 provides impetus to the flow of the cleaning liquid flowing in from the slit-shaped rectifying openings 36, 36 to form a jet, and intensively applies ultrasonic vibration to the jet. , has a hollow tapered shape (tapered shape) with openings at both ends. According to such a shape, the ultrasonic waves imparted to the cleaning liquid L from the vibration plate due to the oscillation of each transducer of the ultrasonic irradiation unit 33 gradually increase in concentration as they propagate toward the tapered upper end side. Therefore, it becomes possible to irradiate ultrasonic waves from the slit-shaped opening 32 with high efficiency. Here, the taper angle (tapered angle) is preferably set to 10 degrees or more and 90 degrees or less. However, the taper angle is not limited to the above range.

次に、図1を参照して、フレキソ印版を超音波洗浄する際の上記構成の超音波洗浄装置1Aの動作について説明する。
洗浄槽2内に洗浄液(たとえば、アルカリ水溶液)Lを供給して、超音波槽(超音波照射設備)3をすっぽり洗浄液Lの液面下に沈めると、スリット状の開口部32を介して、下方の超音波槽3内の洗浄液Lと上方の洗浄槽2の洗浄液Lとの間が連通状態になる。さらに、完全に水没した状態でのフレキソ印版100の搬送が可能となるまで、洗浄槽2内に洗浄液Lを注入する。なお、洗浄液Lは、アルカリ水溶液に限定されない。
Next, referring to FIG. 1, the operation of the ultrasonic cleaning apparatus 1A configured as described above when ultrasonically cleaning a flexographic printing plate will be described.
When a cleaning liquid (for example, alkaline aqueous solution) L is supplied into the cleaning tank 2 and the ultrasonic bath (ultrasonic irradiation equipment) 3 is completely submerged under the liquid surface of the cleaning liquid L, through the slit-shaped opening 32, The cleaning liquid L in the lower ultrasonic bath 3 and the cleaning liquid L in the upper cleaning bath 2 are in communication. Further, the cleaning liquid L is injected into the cleaning tank 2 until the flexographic printing plate 100 can be transported in a completely submerged state. Note that the cleaning liquid L is not limited to the alkaline aqueous solution.

1A,1B 超音波洗浄装置
2 洗浄
3 超音波
31 天井部、流れ規制
32 スリット状の開口部
33 超音波照射
34 超音波集中
4 循環ポンプ(噴流発生手段)
5 搬送手段
51 搬送ローラ
52 搬入ガイド手段
53 搬出ガイド手段
6 高圧洗浄設備(高圧洗浄手段)
100 フレキソ印版(被洗浄物)
101 樹脂凸版
102 キャリア用フィルム
L 洗浄液
J 噴流
F 衝突後の噴流
1A, 1B ultrasonic cleaning device 2 cleaning tank
3 Ultrasonic bath
31 ceiling part, flow control part
32 slit-shaped opening 33 ultrasonic irradiation part
34 Ultrasound Intensive Chamber
4 circulation pump (jet generation means)
5 conveying means 51 conveying roller 52 carry-in guide means 53 carry-out guide means 6 high-pressure washing equipment (high-pressure washing means)
100 Flexo printing plate (object to be cleaned)
101 resin letterpress 102 carrier film L cleaning liquid J jet F jet after collision

Claims (6)

洗浄液の液中で被洗浄物に超音波を作用させて、当該被洗浄物を洗浄処理するための超音波洗浄装置であって、
洗浄液を収容し前記被洗浄物を前記洗浄液の液中に浸漬する第1の槽と、
開口部を介して、前記第1の槽内の洗浄液の液中に連通する態様で、前記洗浄液を収容する第2の槽と、
前記開口部から、前記第1の槽内の洗浄液の液中に、前記第2の槽内の洗浄液を噴流として流出させる噴流発生手段と、
前記第2の槽内の前記噴流となる洗浄液に超音波を付与し、該噴流を伝達媒体として、前記開口部から前記第1の槽内の洗浄液の液中に浸漬される前記被洗浄物に照射する超音波照射手段と、を備えてなることを特徴とする超音波洗浄装置。
An ultrasonic cleaning apparatus for cleaning an object to be cleaned by applying ultrasonic waves to the object to be cleaned in a cleaning liquid,
a first tank containing a cleaning liquid and immersing the object to be cleaned in the cleaning liquid;
a second tank containing the cleaning liquid in such a manner that it communicates with the liquid of the cleaning liquid in the first tank through an opening;
a jet generating means for causing the cleaning liquid in the second tank to flow out as a jet from the opening into the liquid of the cleaning liquid in the first tank;
Ultrasonic waves are applied to the cleaning liquid to be the jet stream in the second tank, and the jet stream is used as a transmission medium for the object to be cleaned that is immersed in the cleaning liquid in the first tank through the opening. and an ultrasonic wave irradiation means for irradiation.
前記開口部に隣接して、前記被洗浄物に衝突後の噴流の流れを規制して、前記超音波の作用により前記被洗浄物から剥離した残滓や汚れの浮遊物の再付着を防止又は軽減するための面状の流れ規制部材がさらに付加されてなると共に、
前記被洗浄物を洗浄液に浸漬して前記開口部と前記流れ規制部材とに面対向の状態で超音波洗浄処理を行う際は、前記被洗浄物と前記流れ規制部材との間の間隙に、前記浮遊物を取り込んだ前記衝突後の噴流を超音波の作用域又はその近傍から遠ざかる方向に所定の勢いで排出する一時的流路が形成される構成となっていることを特徴とする請求項1記載の超音波洗浄装置。
Adjacent to the opening, the flow of the jet after colliding with the object to be cleaned is regulated to prevent or reduce the reattachment of suspended matter such as residue and dirt separated from the object to be cleaned by the action of the ultrasonic waves. A planar flow regulating member is further added for
When the object to be cleaned is immersed in the cleaning liquid and ultrasonic cleaning is performed with the opening and the flow regulating member facing each other, the gap between the object to be cleaned and the flow regulating member is: 2. A configuration characterized in that a temporary flow path is formed in which the jet after collision, which has taken in the floating matter, is discharged with a predetermined force in a direction away from the action area of the ultrasonic wave or its vicinity. 1. The ultrasonic cleaning device according to 1.
前記第2の槽には、所定の距離を隔てて相対向する、基端側の前記超音波照射手段と先端側の前記開口部との間に、前記被洗浄物に対する超音波照射に供される超音波集中手段が設けられ、
該超音波集中手段は、前記超音波照射手段によって前記噴流となる洗浄液に付与された超音波が、先端側の前記開口部に向けて伝搬するにつれて、漸次集中度が増加するように、両端開口で中空先細りの形状に構成されていることを特徴とする請求項1又は2記載の超音波洗浄装置。
In the second tank, the object to be cleaned is subjected to ultrasonic irradiation between the ultrasonic irradiation means on the proximal end side and the opening on the distal end side, which are opposed to each other with a predetermined distance therebetween. an ultrasonic focusing means is provided for
The ultrasonic concentrator has openings at both ends so that the ultrasonic waves imparted to the jet of cleaning liquid by the ultrasonic irradiation means gradually increase in concentration as they propagate toward the opening on the tip side. 3. The ultrasonic cleaning apparatus according to claim 1, wherein the ultrasonic cleaning apparatus is configured in a hollow tapered shape.
両端開口で中空先細りの形状を有する前記超音波照射室と面状の前記流れ規制部材とが、一対の長尺な金属板を、それぞれ、所定の方向に延びる折曲部位にて鋭角に折曲連設されてなると共に、一対の前記折曲部位を所定の隙間を隔てる態様で、相対向配置させてスリット状の前記開口部が形成されていることを特徴とする請求項3記載の超音波洗浄装置。 The ultrasonic irradiation chamber having a hollow tapered shape with openings at both ends and the planar flow restricting member are formed by bending a pair of elongated metal plates at an acute angle at bending portions extending in a predetermined direction. 4. The ultrasonic wave according to claim 3, wherein the slit-like opening is formed by arranging the pair of bent portions so as to face each other with a predetermined gap between them. cleaning equipment. 前記第1の槽内で、前記開口部に近接対向する位置を通って、前記被洗浄物を液中搬送する搬送手段をさらに備えてなると共に、
前記被洗浄物は、前記搬送手段に搬送されて、前記開口部に前記近接対向する位置を通過する際に、前記開口部から流出する前記噴流に晒されながら、同開口部から照射される前記超音波の作用を受けるように構成されていることを特徴とする請求項1ないし4のいずれか1に記載の超音波洗浄装置。
further comprising transport means for transporting the object to be cleaned in the liquid through a position facing the opening in the first tank, and
The object to be cleaned is conveyed by the conveying means and is irradiated from the opening while being exposed to the jet flowing out from the opening when passing through the position facing the opening in close proximity. 5. The ultrasonic cleaning apparatus according to any one of claims 1 to 4, wherein the ultrasonic cleaning apparatus is configured to receive the action of ultrasonic waves.
超音波洗浄処理を終えて前記第1の槽内の洗浄液の液中から大気中に出された前記被洗浄物に対して、前記第1の槽内の前記洗浄液を高圧で噴射して仕上げ洗浄処理するための高圧洗浄手段がさらに付加されていることを特徴とする請求項1ないし5のいずれか1に記載の超音波洗浄装置。 Finish cleaning by injecting the cleaning liquid in the first tank at high pressure onto the object to be cleaned that has been exposed to the atmosphere from the cleaning liquid in the first tank after the ultrasonic cleaning treatment is completed. 6. The ultrasonic cleaning apparatus according to any one of claims 1 to 5, further comprising high-pressure cleaning means for processing.
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