JP4089058B2 - Cleaning device and cleaning method for printing screen - Google Patents

Cleaning device and cleaning method for printing screen Download PDF

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JP4089058B2
JP4089058B2 JP35135698A JP35135698A JP4089058B2 JP 4089058 B2 JP4089058 B2 JP 4089058B2 JP 35135698 A JP35135698 A JP 35135698A JP 35135698 A JP35135698 A JP 35135698A JP 4089058 B2 JP4089058 B2 JP 4089058B2
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wiping
screen
unit
suction
moving
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JP2000168055A (en
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一巳 加藤
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Sony Corp
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Sony Corp
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【０００１】
【発明の属する技術分野】
本発明は、印刷に用いるスクリーンを清掃する装置及び方法に関するものである。
【０００２】
【従来の技術】
電子部品が搭載される基板に回路パターンを形成する方法としては、スクリーン印刷法が多用されている。このスクリーン印刷法は、近年の部品実装の高密度化に伴って、高精度化が要求されてきているが、そのためにはスクリーンの開口部に目詰まりしたり、裏面に回ったクリーム半田や導電性ペースト等をいかに確実に除去できるかが重要な要素となる。
【０００３】
図５は、従来の印刷用スクリーンの清掃装置の一例を示す側面図である。
この印刷用スクリーンの清掃装置１０は、ロールペーパ１１が、２つの駆動ローラ１２に懸け渡され、ロールペ−パ１１の下面略中央部が、溶剤タンク１３から延びる供給管１４の先端により上方に突き上げられた構成となっている。さらに、真空吸引機構１５が、真空ポンプ１６に接続され、ロールペーパ１１の側に配置された構成となっている。そして、これらは、上下機構１７により上下動可能に構成されている。
【０００４】
このような構成において、その動作例を説明する。
スクリーン１は、印刷終了後に印刷用スクリーンの清掃装置１０の上方に水平移動されて清掃が開始される。先ず、ロールペーパ１１及び真空吸引機構１５を上下機構１７により上昇させて、ロールペーパ１１の上面略中央部及び真空吸引機構１５の吸引口１５ａをスクリーン１の裏面に接触させる。次に、溶剤を溶剤タンク１３から供給管１４を介してロールペーパ１１の下面略中央部に供給し、駆動ローラ１２を駆動してロールペーパ１１を巻き上げると共に、真空ポンプ１６を駆動して吸引口１５ａを負圧にする。同時に、スクリーン１を水平移動させる。これにより、スクリーン１の開口部に目詰まりしたり、裏面に回ったクリーム半田や導電性ペースト等は、ロールペーパ１１の上面で拭き取られると共に、吸引口１５ａから真空吸引される。
【０００５】
【発明が解決しようとする課題】
上述した従来の印刷用スクリーンの清掃装置１０は、スクリーン１の付着物の拭き取りに使い捨てのロールペーパ１１を使用しているため、コストが嵩み、使用済のペーパを廃棄する必要がある。また、スクリーン１の付着物の拭き取り動作は、スクリーン１に対して一定方向であるため、スクリーン１に拭きムラや拭き癖が残り易く、スクリーン印刷の精度が低下する。
【０００６】
本発明は、上述した事情から成されたものであり、スクリーンの付着物を使い捨てのロールペーパを用いずに低コストかつ省資源で拭き取ることができ、直線動作や斜め動作等の任意の拭き取り動作を行うことでスクリーン印刷の精度を良好に保つことができる印刷用スクリーンの清掃装置及び清掃方法を提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記目的は、本発明にあっては、印刷に用いるスクリーンを清掃する装置であって、前記スクリーンの付着物を拭き取るための布が着脱可能に装着された拭取部と、拭取部を垂直方向に移動させる第１垂直移動部と、スクリーンの付着物を吸引する吸引部と、吸引部を垂直方向に移動させる第２垂直移動部と、拭取部を含む第１垂直移動部と吸引部を含む第２垂直移動部を垂直方向と直交する水平方向に移動させる水平移動部とを備えている。水平移動部は、垂直方向と直交するＹ方向に移動可能なＹ移動台と、Ｙ移動台に垂直方向と直交する方向であってＹ方向とも直交するＸ方向に移動可能に載置されるＸ移動台とを有している。拭取部を含む第１垂直移動部と吸引部を含む第２垂直移動部は、Ｘ移動台に配設されている。そして、第１垂直移動部を動作させることにより拭取部を上昇又は下降させてスクリーンの一面に接触させると共に水平移動部を動作させることにより拭取部を水平移動させてスクリーンから付着物を拭き取り、その後、第２垂直移動部を動作させることにより吸引部を上昇又は下降さえてスクリーンの一面に接触させる共に水平移動部を動作させることにより吸引部を水平移動させてスクリーンから付着物を吸引することにより達成される。
【０００８】
また、上記目的は、本発明にあっては、印刷に用いるスクリーンの付着物を拭取部で拭き取って、吸引部で吸引することにより、スクリーンを清掃する方法であって、拭取部には、付着物を拭き取るための布が着脱可能に装着されており、拭取部及び吸引部を退避位置からスクリーンに水平移動させ、拭取部を垂直移動させてスクリーンの裏面に接触させ、拭取部を所定の経路で水平移動させて付着物を拭き取り、拭取部を垂直移動させてスクリーンから離すと共に吸引部を垂直移動させてスクリーンの裏面に接触させ、吸引部を水平移動させて付着物を吸引し、吸引部を垂直移動させて前記スクリーンから離すことにより達成される。
【０００９】
上記構成によれば、従来のロールペーパタイプから着脱可能なウエスタイプに変更して、直線動作や斜め動作等の任意の拭き取り動作を行えるようにしているので、コストを低減させ、使用済のペーパの発生も無く、また、拭きムラや拭き癖を残さず、スクリーン印刷の精度を向上させることができる。
【００１０】
【発明の実施の形態】
以下、本発明の好適な実施の形態を添付図面に基づいて詳細に説明する。
なお、以下に述べる実施の形態は、本発明の好適な具体例であるから、技術的に好ましい種々の限定が付されているが、本発明の範囲は、以下の説明において特に本発明を限定する旨の記載がない限り、これらの形態に限られるものではない。
【００１１】
図１は、本発明の印刷用スクリーンの清掃装置の実施形態の全体構成を示す斜視図である。この印刷用スクリーンの清掃装置１００は、スクリーン１の付着物を拭き取る拭取部１１０、拭取部１１０を垂直方向に移動させる第１垂直移動部１２０、スクリーン１の付着物を吸引する吸引部１３０、吸引部１３０を垂直方向に移動させる第２垂直移動部１４０、拭取部１１０と吸引部１４０を水平方向に移動させる水平移動部１５０、拭取部１１０を回転させる回転部１６０、溶剤を滴下する溶剤滴下部である滴下部１７０及び各部の動作を制御する制御部１８０で大略構成されている。
【００１２】
このような構成の印刷用スクリーンの清掃装置１００は、クリーム半田や導電性ペースト等を用いて基板等に所定のパターンを印刷するスクリーン印刷機のスクリーン１の下方に一体的に配設され、各移動部１２０、１４０、１５０を適宜動作させることにより、拭取部１１０と吸引部１３０を順にスクリーン１の裏面に接触移動させて付着物を拭き取り、吸引する。
【００１３】
拭取部１１０は、プラスチックで成る角柱状の保持部材１１１の周囲に、スクリーン１の付着物を拭き取るための不織布等で成る布（ウエス）１１２が着脱可能に巻回された構成となっている。保持部材１１１の両端は、台座１１３に装着されている回転部１６０、即ちバネ１６１を備えた可動軸１６２とステップモータ１６３の回転軸１６４に回転可能に、かつ着脱可能に軸支持されている。このような構成によれば、ステップモータ１６３を駆動して保持部材１１１を所定角度回転させることにより、布１１２の拭取面を交替させることができる。
【００１４】
また、可動軸１６２を外側に引っ張って保持部材１１１の一端から抜き、拭取部１１０を台座１１３から外すことにより、布１１２を交換することができる。尚、この例の保持部材１１１は、四角柱状に形成されているが、任意の角柱状に形成してもよい。また、バネ１６１を備えた可動軸１６２の代わりに、エアシリンダや油圧シリンダを用いてもよい。
【００１５】
第１垂直移動部１２０は、台座１１３とこの台座１１３の下方に位置するＸ移動台１５１の間に配設された２つのエアシリンダ１２１で構成されている。各エアシリンダ１２１は、Ｚ方向（垂直方向）が駆動方向となるようにして台座１１３の両端下部をそれぞれ支持するように配設されている。このような構成によれば、各エアシリンダ１２１を同時に同方向に駆動させることにより、拭取部１１０を上下動させることができる。尚、エアシリンダ１２１の代わりに、油圧シリンダやモータとボールネジ・ナットの組み合わせを用いてもよい。
【００１６】
吸引部１３０は、プラスチックで成る中空角柱状の吸引口１３１が上方を向くようにして台座１３２に固定された構成となっている。吸引口１３１の末端には、真空ポンプ１３３が接続されている。このような構成によれば、真空ポンプ１３３を駆動させることにより、吸引口１３１を負圧にすることができる。
【００１７】
第２垂直移動部１４０も、第１垂直移動部１２０と同様に、台座１３２とこの台座１３２の下方に位置するＸ移動台１５１の間に配設された２つのエアシリンダ１４１で構成されている。各エアシリンダ１４１は、Ｚ方向（垂直方向）が駆動方向となるようにして台座１３２の両端下部をそれぞれ支持し、かつ吸引部１３０が拭取部１１０と並ぶように配設されている。このような構成によれば、各エアシリンダ１４１を同時に同方向に駆動させることにより、吸引部１３０を上下動させることができる。尚、エアシリンダ１４１の代わりに、油圧シリンダやモータとボールネジ・ナットの組み合わせを用いてもよい。
【００１８】
水平移動部１５０は、Ｘ方向（水平方向）に移動可能なＸ移動台１５１と、このＸ移動台１５１の下部に配設され、Ｙ方向（水平方向）に移動可能なＹ移動台１５２と、Ｘ移動台１５１を移動させるＸモータ１５３及びＸボールネジ・ナット１５４、１５５と、Ｙ移動台１５２を移動させるＹモータ１５６及びＹボールネジ・ナット１５７、１５８で構成されている。このような構成によれば、Ｘモータ１５３及びＹモータ１５６を適宜駆動させることにより、拭取部１１０と吸引部１３０を同時に水平移動させることができる。尚、水平移動部１５０を別体で構成せず、スクリーン印刷機の水平移動部を利用するようにしてもよい。
【００１９】
滴下部１７０は、図示しない溶剤供給源から供給される溶剤を吐出する吐出弁１７１と、溶剤を滴下するノズル１７２で構成されている。このような構成によれば、ノズル１７２の下方で拭取部１１０を水平移動させながら、ノズル１７２から溶剤を滴下することにより、布１１２の拭取面上に溶剤を均一に染み渡らせることができる。尚、滴下部１７０自体が単独で水平移動可能なように構成してもよい。
【００２０】
制御部１８０は、拭取部１１０、第１垂直移動部１２０、吸引部１３０、第２垂直移動部１４０、水平移動部１５０、回転部１６０及び滴下部１７０の動作をプログラム制御する機能を有する。特に、印刷対象物である基板の寸法データと面付けデータに基づいて、拭取部１１０の拭き取り動作範囲を設定する。
【００２１】
このような構成において、その動作例を図２〜図４を参照して説明する。
初期状態においては、拭取部１１０や吸引部１３０等は、退避位置、即ちスクリーン１の下方から水平方向に所定距離離れた位置であって、滴下部１７０の下方に拭取部１１０が配置される位置に退避している（図２のＡの位置）。制御部１８０は、スクリーン印刷機から拭き取り開始信号を受けると、Ｘモータ１５３を駆動して拭取部１１０をＸ方向に往復移動させる（図２（Ａ）の矢印ａ）と同時に、吐出弁１７１を開放してノズル１７２から布１１２の上面に溶剤を直線状に滴下させる（図２（Ｂ）の矢印ｂ）。尚、この溶剤滴下は、湿式の清掃の場合は必須であるが、乾式の清掃の場合は省略する。
【００２２】
次に、制御部１８０は、Ｙモータ１５６を駆動して拭取部１１０及び吸引部１３０を退避位置から水平に移動させ（図２（Ｂ）の矢印ｃ）、スクリーン１に形成されている基板エリアの手前であって、スクリーン１の裏面下方（以下、開始位置という）に位置決めする（図２（Ｂ）のＢの位置）。そして、第１垂直移動部１２０を駆動して拭取部１１０を垂直に上昇させ（図２（Ｂ）の矢印ｄ）、布１１２の上面をスクリーン１の裏面に接触させる。
【００２３】
次に、制御部１８０は、Ｘモータ１５３及びＹモータ１５６を駆動して、拭取部１１０を基板の寸法データと面付けデータに基づく基板エリアの範囲をカバーするように設定されている拭き取り動作範囲内で水平動作させ、布１１２の上面でスクリーン１の裏面に付着しているクリーム半田等を拭き取らせ、荒拭きを完了する。このときの拭取部１１０の拭き取り動作としては、図２の矢印ｅに示すように、スクリーン１に対して所定の送りピッチで略平行に水平移動させて拭き取る平行動作拭き、あるいは図４の矢印ｆに示すように、スクリーン１に対して所定の送りピッチで斜めに水平移動させて拭き取る対角動作拭きが採られる。尚、この場合は１回の荒拭き動作で終了しているが、任意の回数を設定することができる。
【００２４】
荒拭き取り動作完了後、制御部１８０は、第１垂直移動部１２０を駆動して拭取部１１０を垂直に下降させ（図２（Ｂ）の矢印ｇ）、Ｘモータ１５３及びＹモータ１５６を駆動して、拭取部１１０及び吸引部１３０を水平に移動させ開始位置に位置決めする。そして、制御部１８０は、第２垂直移動部１４０を駆動して吸引部１３０をＺ方向に上昇させ（図３（Ｂ）の矢印ｈ）、吸引口１３１をスクリーン１の裏面に接触させる。
【００２５】
そして、制御部１８０は、Ｙモータ１５６を駆動して吸引部１３０を水平動作させると共に、真空ポンプ１３３を駆動させ、吸引口１３１でスクリーン１の裏面に付着している残りのクリーム半田等を吸引させる。このときの吸引部１３０の吸引動作としては、図３の矢印ｉに示すように、スクリーン１に対して一方向（Ｙ方向）に水平移動させて吸引する一方向動作吸引が採られる。尚、この場合は１回の吸引動作で終了しているが、任意の回数を設定することができる。
【００２６】
吸引動作完了後、制御部１８０は、第２垂直移動部１４０を駆動して吸引部１３０を垂直に下降させ（図３（Ｂ）の矢印ｊ）、Ｙモータ１５６を駆動して、図３の矢印ｋに示すように、拭取部１１０及び吸引部１３０を水平に移動させ開始位置に位置決めする。そして、制御部１８０は、ステップモータ１６３を駆動して拭取部１１０を９０°回転させ、布１１２の拭取面を交替させる。そして、第１垂直移動部１２０を駆動して拭取部１１０を垂直に上昇させ、布１１２の上面をスクリーン１の裏面に接触させて上述した拭き取り動作を再度実行し、仕上げ拭きを完了する。
【００２７】
尚、この場合は１回の仕上げ拭き動作で終了しているが、任意の回数を設定することができる。また、この仕上げ拭きは、荒拭きと吸引のみでスクリーン１をほぼ清掃できる場合は、省略してもよい。その後、制御部１８０は、Ｙモータ１５６を駆動して拭取部１１０及び吸引部１３０を開始位置から水平に移動させ（図２（Ｂ）の矢印ｌ）、退避位置に退避させて清掃を完了する。尚、次の清掃までのインターバルは任意に設定することができる。
【００２８】
ここで、荒拭きに用いた拭取面や仕上げ拭きに用いた拭取面は、例えば３０回の拭き取り動作完了後に拭取部１１０を回転させて他の拭取面に交替させるようにする。このとき、拭き取り回数をカウントしておき、設定回数をオーバーしたらアラームを鳴らすようにすれば、拭取面の交替を確実に行うことができる。このように、拭取面の更新が容易に行えるので、清掃効率を高めることができる。
【００２９】
また、全拭取面を使用した後は、拭取部１１０を取外して布１１２を保持部材１１１から剥がし、新たな布１１２を巻回すると共に、使用済みの布１１２は洗浄するようにする。このように、布１１２の交換が容易に行えると共に、布１１２の再使用が可能となるので、清掃効率を高めることができると共に、清掃コストを低減させることができる。
さらに、Ｘモータ１５３及びＹモータ１５６の回転を可変とすることにより、荒拭き速度と仕上げ拭き速度をそれぞれ設定したり、送りピッチを任意に設定することができる。
【００３０】
【発明の効果】
以上に述べたように、本発明によれば、スクリーンの付着物を低コストかつ省資源で拭き取ることができ、スクリーン印刷の精度を良好に保つことができる。
【図面の簡単な説明】
【図１】本発明の印刷用スクリーンの清掃装置の実施形態の全体構成を示す斜視図。
【図２】図１の印刷用スクリーンの清掃装置の動作例を示す第１の平面図。
【図３】図１の印刷用スクリーンの清掃装置の動作例を示す第２の平面図。
【図４】図１の印刷用スクリーンの清掃装置の別の動作例を示す平面図。
【図５】従来の印刷用スクリーンの清掃装置の一例を示す側面図。
【符号の説明】
１・・・スクリーン、１００・・・印刷用スクリーンの清掃装置、１１０・・・拭取部、１１１・・・保持部材、１１２・・・布（ウエス）、１１３・・・台座、１２０・・・第１垂直移動部、１２１・・・エアシリンダ、１３０・・・吸引部、１３１・・・吸引口、１３２・・・台座、１４０・・・第２垂直移動部、１４１・・・エアシリンダ、１５０・・・水平移動部、１５１・・・Ｘ移動台、１５２・・・Ｙ移動台、１５３・・・Ｘモータ、１５４・・・Ｘボールネジ、１５５・・・Ｘボールナット、１５６・・・Ｙモータ、１５７・・・Ｙボールネジ、１５８・・・Ｙボールナット、１６０・・・回転部、１６１・・・バネ、１６２・・・可動軸、１６３・・・ステップモータ、１６４・・・回転軸、１７０・・・滴下部、１７１・・・吐出弁、１７２・・・ノズル、１８０・・・制御部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus and a method for cleaning a screen used for printing.
[0002]
[Prior art]
As a method for forming a circuit pattern on a substrate on which electronic components are mounted, a screen printing method is frequently used. This screen printing method has been required to be highly accurate with the recent increase in the density of component mounting. To that end, clogging of the screen opening, cream solder or conductive material that has turned to the back side, etc. has been required. It is an important factor how reliably the adhesive paste can be removed.
[0003]
FIG. 5 is a side view showing an example of a conventional printing screen cleaning apparatus.
In the printing screen cleaning apparatus 10, a roll paper 11 is suspended between two drive rollers 12, and a substantially central portion of the lower surface of the roll paper 11 is pushed upward by a tip of a supply pipe 14 extending from a solvent tank 13. It is the composition which was made. Further, the vacuum suction mechanism 15 is connected to the vacuum pump 16 and arranged on the roll paper 11 side. And these are comprised by the up-down mechanism 17 so that an up-down movement is possible.
[0004]
An operation example of such a configuration will be described.
After the printing is completed, the screen 1 is moved horizontally above the printing screen cleaning device 10 to start cleaning. First, the roll paper 11 and the vacuum suction mechanism 15 are raised by the up-and-down mechanism 17, and the substantially upper center portion of the roll paper 11 and the suction port 15 a of the vacuum suction mechanism 15 are brought into contact with the back surface of the screen 1. Next, the solvent is supplied from the solvent tank 13 through the supply pipe 14 to the substantially central portion of the lower surface of the roll paper 11, the drive roller 12 is driven to wind up the roll paper 11, and the vacuum pump 16 is driven to suck the suction port. 15a is set to a negative pressure. At the same time, the screen 1 is moved horizontally. As a result, clogged solder or conductive paste clogged in the opening of the screen 1 or turned to the back surface is wiped off from the upper surface of the roll paper 11 and vacuumed from the suction port 15a.
[0005]
[Problems to be solved by the invention]
The conventional printing screen cleaning device 10 described above uses the disposable roll paper 11 for wiping off the deposits on the screen 1, so that the cost is high and it is necessary to discard the used paper. Moreover, since the wiping operation of the deposits on the screen 1 is in a fixed direction with respect to the screen 1, uneven wiping or wiping tends to remain on the screen 1, and the accuracy of screen printing decreases.
[0006]
The present invention is made up of the above-mentioned circumstances, and can remove the adhered matter on the screen at low cost and resource saving without using disposable roll paper, and any wiping operation such as a linear operation or an oblique operation. It is an object of the present invention to provide a printing screen cleaning device and a cleaning method capable of maintaining good screen printing accuracy.
[0007]
[Means for Solving the Problems]
In the present invention, the above object is an apparatus for cleaning a screen used for printing, wherein a wiping portion on which a cloth for wiping off the deposits on the screen is detachably mounted, and the wiping portion are vertically arranged. A first vertical moving unit that moves in the direction, a suction unit that sucks the adhering matter on the screen, a second vertical moving unit that moves the suction unit in the vertical direction, a first vertical moving unit and a suction unit including a wiping unit Bei Eteiru a horizontal moving unit that moves in a horizontal direction a second vertical movement part perpendicular to the vertical direction including the. The horizontal moving unit includes a Y moving table that is movable in a Y direction orthogonal to the vertical direction, and an X that is movably mounted on the Y moving table in a direction orthogonal to the vertical direction and orthogonal to the Y direction. And a moving table. The first vertical moving unit including the wiping unit and the second vertical moving unit including the suction unit are disposed on the X moving table. Then, the first vertical moving unit is operated to raise or lower the wiping unit to contact one surface of the screen, and the horizontal moving unit is operated to horizontally move the wiping unit to wipe off deposits from the screen. Thereafter, the second vertical movement unit is operated to raise or lower the suction unit to contact one surface of the screen, and the horizontal movement unit is operated to horizontally move the suction unit to suck the deposit from the screen. Is achieved.
[0008]
The above-described object is, in the present invention, wipe deposits screen used for printing by wiping unit, by suction by the suction unit, a method for cleaning the screen, the wiper portion The cloth for wiping off the attached material is detachably attached, and the wiping part and the suction part are moved horizontally from the retracted position to the screen, and the wiping part is moved vertically to make contact with the back surface of the screen. Move the part horizontally along the specified path to wipe off the deposits, move the wiping part vertically away from the screen and move the suction part vertically to contact the back of the screen, and move the suction part horizontally to deposit. Is achieved by moving the suction part vertically away from the screen.
[0009]
According to the above configuration, the conventional roll paper type is changed to a detachable waste type so that an arbitrary wiping operation such as a linear operation or an oblique operation can be performed. In addition, the screen printing accuracy can be improved without leaving uneven wiping or wiping.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
Note that the embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.
[0011]
FIG. 1 is a perspective view showing an overall configuration of an embodiment of a printing screen cleaning apparatus of the present invention. The printing screen cleaning apparatus 100 includes a wiping unit 110 that wipes off deposits on the screen 1, a first vertical moving unit 120 that moves the wiping unit 110 in the vertical direction, and a suction unit 130 that sucks deposits on the screen 1. , A second vertical moving unit 140 for moving the suction unit 130 in the vertical direction, a horizontal moving unit 150 for moving the wiping unit 110 and the suction unit 140 in the horizontal direction, a rotating unit 160 for rotating the wiping unit 110, and dropping the solvent The solvent dripping unit is a dripping unit 170 and a control unit 180 that controls the operation of each unit.
[0012]
The printing screen cleaning device 100 having such a configuration is integrally disposed below the screen 1 of a screen printing machine that prints a predetermined pattern on a substrate or the like using cream solder, conductive paste, or the like. By appropriately operating the moving units 120, 140, and 150, the wiping unit 110 and the suction unit 130 are sequentially brought into contact with the back surface of the screen 1 to wipe off and suck the deposits.
[0013]
The wiping portion 110 has a configuration in which a cloth (waste) 112 made of a nonwoven fabric or the like for wiping off deposits on the screen 1 is detachably wound around a prismatic holding member 111 made of plastic. . Both ends of the holding member 111 are rotatably and detachably supported by a rotating portion 160 mounted on the pedestal 113, that is, a movable shaft 162 provided with a spring 161 and a rotating shaft 164 of a step motor 163. According to such a configuration, the wiping surface of the cloth 112 can be changed by driving the step motor 163 and rotating the holding member 111 by a predetermined angle.
[0014]
In addition, the cloth 112 can be replaced by pulling the movable shaft 162 outward and removing it from one end of the holding member 111 and removing the wiping portion 110 from the pedestal 113. The holding member 111 in this example is formed in a quadrangular prism shape, but may be formed in an arbitrary prism shape. Further, instead of the movable shaft 162 provided with the spring 161, an air cylinder or a hydraulic cylinder may be used.
[0015]
The first vertical movement unit 120 includes a pedestal 113 and two air cylinders 121 disposed between the X movement pedestal 151 located below the pedestal 113. Each air cylinder 121 is disposed so as to support the lower portions of both ends of the pedestal 113 such that the Z direction (vertical direction) is the driving direction. According to such a configuration, the wiping unit 110 can be moved up and down by simultaneously driving the air cylinders 121 in the same direction. Instead of the air cylinder 121, a combination of a hydraulic cylinder, a motor, and a ball screw / nut may be used.
[0016]
The suction portion 130 is configured to be fixed to the pedestal 132 so that a hollow prismatic suction port 131 made of plastic faces upward. A vacuum pump 133 is connected to the end of the suction port 131. According to such a configuration, the suction port 131 can be set to a negative pressure by driving the vacuum pump 133.
[0017]
Similarly to the first vertical moving unit 120, the second vertical moving unit 140 is also composed of two air cylinders 141 disposed between the pedestal 132 and the X moving table 151 located below the pedestal 132. . Each air cylinder 141 is arranged so that the Z direction (vertical direction) is the driving direction and supports the lower portions at both ends of the pedestal 132, and the suction part 130 is aligned with the wiping part 110. According to such a configuration, the suction portion 130 can be moved up and down by simultaneously driving the air cylinders 141 in the same direction. Instead of the air cylinder 141, a combination of a hydraulic cylinder, a motor, and a ball screw / nut may be used.
[0018]
The horizontal moving unit 150 includes an X moving table 151 movable in the X direction (horizontal direction), a Y moving table 152 disposed below the X moving table 151 and movable in the Y direction (horizontal direction), An X motor 153 and X ball screws / nuts 154 and 155 for moving the X moving table 151 and a Y motor 156 and Y ball screws / nuts 157 and 158 for moving the Y moving table 152 are included. According to such a configuration, the wiping unit 110 and the suction unit 130 can be horizontally moved simultaneously by appropriately driving the X motor 153 and the Y motor 156. Note that the horizontal moving unit 150 may not be configured as a separate unit, and the horizontal moving unit of the screen printing machine may be used.
[0019]
The dropping unit 170 includes a discharge valve 171 for discharging a solvent supplied from a solvent supply source (not shown) and a nozzle 172 for dropping the solvent. According to such a configuration, the solvent can be evenly spread on the wiping surface of the cloth 112 by dropping the solvent from the nozzle 172 while horizontally moving the wiping portion 110 below the nozzle 172. it can. In addition, you may comprise so that dripping part 170 itself can be horizontally moved independently.
[0020]
The control unit 180 has a function of performing program control on the operations of the wiping unit 110, the first vertical movement unit 120, the suction unit 130, the second vertical movement unit 140, the horizontal movement unit 150, the rotation unit 160, and the dropping unit 170. In particular, the wiping operation range of the wiping unit 110 is set based on the dimension data and imposition data of the substrate that is the printing object.
[0021]
In such a configuration, an example of the operation will be described with reference to FIGS.
In the initial state, the wiping unit 110, the suction unit 130, and the like are at a retracted position, that is, a position that is a predetermined distance in the horizontal direction from the lower side of the screen 1, and the wiping unit 110 is disposed below the dropping unit 170. (A position in FIG. 2). When receiving the wiping start signal from the screen printing machine, the control unit 180 drives the X motor 153 to reciprocate the wiping unit 110 in the X direction (arrow a in FIG. 2A) and at the same time, the discharge valve 171. And the solvent is dripped linearly onto the upper surface of the cloth 112 from the nozzle 172 (arrow b in FIG. 2B). This solvent dripping is essential in the case of wet cleaning, but is omitted in the case of dry cleaning.
[0022]
Next, the control unit 180 drives the Y motor 156 to move the wiping unit 110 and the suction unit 130 horizontally from the retracted position (arrow c in FIG. 2B), and the substrate formed on the screen 1 It is positioned before the area and below the back surface of the screen 1 (hereinafter referred to as a start position) (position B in FIG. 2B). Then, the first vertical movement unit 120 is driven to raise the wiping unit 110 vertically (arrow d in FIG. 2B), and the upper surface of the cloth 112 is brought into contact with the back surface of the screen 1.
[0023]
Next, the control unit 180 drives the X motor 153 and the Y motor 156 to wipe the wiping unit 110 so as to cover the range of the substrate area based on the substrate dimension data and the imposition data. The horizontal movement is performed within the range, and the solder paste attached to the back surface of the screen 1 on the upper surface of the cloth 112 is wiped off to complete the rough wiping. As the wiping operation of the wiping unit 110 at this time, as shown by an arrow e in FIG. 2, the wiping operation is performed by horizontally moving the screen 1 at a predetermined feed pitch and moving substantially parallel to the screen 1, or the arrow in FIG. As shown in f, diagonal operation wiping is performed in which the screen 1 is horizontally moved and wiped obliquely at a predetermined feed pitch. In this case, the process is completed by one rough wiping operation, but an arbitrary number of times can be set.
[0024]
After the rough wiping operation is completed, the control unit 180 drives the first vertical movement unit 120 to lower the wiping unit 110 vertically (arrow g in FIG. 2B), and drives the X motor 153 and the Y motor 156. Then, the wiping unit 110 and the suction unit 130 are moved horizontally and positioned at the start position. Then, the control unit 180 drives the second vertical movement unit 140 to raise the suction unit 130 in the Z direction (arrow h in FIG. 3B), and brings the suction port 131 into contact with the back surface of the screen 1.
[0025]
Then, the control unit 180 drives the Y motor 156 to horizontally operate the suction unit 130 and also drives the vacuum pump 133 to suck the remaining cream solder attached to the back surface of the screen 1 through the suction port 131. Let As the suction operation of the suction unit 130 at this time, as shown by an arrow i in FIG. 3, one-way operation suction is performed in which the suction is performed by moving horizontally in one direction (Y direction) with respect to the screen 1. In this case, the suction operation is completed once, but an arbitrary number of times can be set.
[0026]
After the suction operation is completed, the control unit 180 drives the second vertical movement unit 140 to vertically lower the suction unit 130 (arrow j in FIG. 3B), drives the Y motor 156, As indicated by the arrow k, the wiping unit 110 and the suction unit 130 are moved horizontally and positioned at the start position. Then, the control unit 180 drives the step motor 163 to rotate the wiping unit 110 by 90 °, and replaces the wiping surface of the cloth 112. Then, the first vertical movement unit 120 is driven to raise the wiping unit 110 vertically, the upper surface of the cloth 112 is brought into contact with the back surface of the screen 1, and the wiping operation described above is performed again to complete the finish wiping.
[0027]
In this case, the finishing wiping operation is completed once, but an arbitrary number of times can be set. Further, this finishing wiping may be omitted when the screen 1 can be substantially cleaned only by rough wiping and suction. Thereafter, the control unit 180 drives the Y motor 156 to move the wiping unit 110 and the suction unit 130 horizontally from the start position (arrow 1 in FIG. 2B), and retracts to the retreat position to complete the cleaning. To do. The interval until the next cleaning can be arbitrarily set.
[0028]
Here, the wiping surface used for rough wiping and the wiping surface used for finishing wiping are, for example, rotated after the wiping operation is performed 30 times and rotated to another wiping surface. At this time, if the number of times of wiping is counted and an alarm is sounded when the set number of times is exceeded, the wiping surface can be replaced with certainty. Thus, since the wiping surface can be easily updated, the cleaning efficiency can be improved.
[0029]
Further, after the entire wiping surface is used, the wiping portion 110 is removed, the cloth 112 is peeled off from the holding member 111, a new cloth 112 is wound, and the used cloth 112 is washed. As described above, the cloth 112 can be easily replaced and the cloth 112 can be reused. Therefore, the cleaning efficiency can be improved and the cleaning cost can be reduced.
Further, by making the rotations of the X motor 153 and the Y motor 156 variable, the rough wiping speed and the finishing wiping speed can be set, and the feed pitch can be arbitrarily set.
[0030]
【The invention's effect】
As described above, according to the present invention, screen deposits can be wiped off at low cost and with reduced resources, and the accuracy of screen printing can be kept good.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the overall configuration of an embodiment of a printing screen cleaning apparatus of the present invention.
2 is a first plan view showing an operation example of the printing screen cleaning device of FIG. 1; FIG.
3 is a second plan view showing an operation example of the printing screen cleaning device of FIG. 1; FIG.
4 is a plan view showing another operation example of the printing screen cleaning apparatus of FIG. 1; FIG.
FIG. 5 is a side view showing an example of a conventional printing screen cleaning apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Screen, 100 ... Printing screen cleaning apparatus, 110 ... Wiping part, 111 ... Holding member, 112 ... Cloth (waste), 113 ... Base, 120 ... -1st vertical movement part, 121 ... Air cylinder, 130 ... Suction part, 131 ... Suction port, 132 ... Base, 140 ... 2nd vertical movement part, 141 ... Air cylinder , 150 ... Horizontal moving part, 151 ... X moving table, 152 ... Y moving table, 153 ... X motor, 154 ... X ball screw, 155 ... X ball nut, 156 ... Y motor, 157 ... Y ball screw, 158 ... Y ball nut, 160 ... rotating part, 161 ... spring, 162 ... movable shaft, 163 ... step motor, 164 ... Rotating shaft, 170 ... Drip section, 171, And discharge valve, 172 ... nozzle, 180 ... control unit

Claims (6)

印刷に用いるスクリーンを清掃する装置であって、
前記スクリーンの付着物を拭き取るための布が着脱可能に装着された拭取部と、
前記拭取部を垂直方向に移動させる第１垂直移動部と、
前記スクリーンの付着物を吸引する吸引部と、
前記吸引部を垂直方向に移動させる第２垂直移動部と、
前記拭取部を含む前記第１垂直移動部と前記吸引部を含む前記第２垂直移動部を前記垂直方向と直交する水平方向に移動させる水平移動部とを備え、
前記水平移動部は、前記垂直方向と直交するＹ方向に移動可能なＹ移動台と、前記Ｙ移動台に前記垂直方向と直交する方向であって前記Ｙ方向とも直交するＸ方向に移動可能に載置されるＸ移動台とを有しており、
前記拭取部を含む前記第１垂直移動部と前記吸引部を含む前記第２垂直移動部は、前記Ｘ移動台に配設され、
前記第１垂直移動部を動作させることにより前記拭取部を上昇又は下降させて前記スクリーンの一面に接触させると共に前記水平移動部を動作させることにより前記拭取部を水平移動させて前記スクリーンから前記付着物を拭き取り、その後、前記第２垂直移動部を動作させることにより前記吸引部を上昇又は下降させて前記スクリーンの一面に接触させる共に前記水平移動部を動作させることにより前記吸引部を水平移動させて前記スクリーンから前記付着物を吸引する
ことを特徴とする印刷用スクリーンの清掃装置。An apparatus for cleaning a screen used for printing,
A wiping portion on which a cloth for wiping off the adhered matter on the screen is detachably attached ;
A first vertical movement unit for moving the wiping unit in a vertical direction;
A suction part for sucking the adhered matter on the screen;
A second vertical movement unit for moving the suction unit in a vertical direction;
A horizontal movement unit that moves the first vertical movement unit including the wiping unit and the second vertical movement unit including the suction unit in a horizontal direction orthogonal to the vertical direction ;
The horizontal movement unit is movable in a Y direction perpendicular to the vertical direction and movable in an X direction perpendicular to the vertical direction and perpendicular to the Y direction. An X moving table to be placed;
The first vertical moving part including the wiping part and the second vertical moving part including the suction part are disposed on the X moving table,
By operating the first vertical moving unit, the wiping unit is raised or lowered to contact one surface of the screen and the horizontal moving unit is operated to horizontally move the wiping unit from the screen. The adhering matter is wiped off, and then the suction unit is moved up and down by operating the second vertical moving unit to contact one surface of the screen and the horizontal moving unit is operated to move the suction unit horizontally. An apparatus for cleaning a printing screen, wherein the adhering matter is sucked from the screen by being moved . 前記布は、複数の拭取面を有し、
前記拭取部を回転させることにより前記複数の拭取面のうち前記スクリーンに接触する面を変更させる回転部を備えた請求項１に記載の印刷用スクリーンの清掃装置。 The cloth has a plurality of wiping surfaces;
Cleaning device for printing screens according to claim 1, further comprising a rotation unit for changing the surface in contact with the screen of the plurality of wiping surface by Rukoto rotates the wiping portion. 前記拭取部と相対的に水平移動しながら溶剤を滴下することにより当該溶剤を前記拭取部に含浸させる溶剤滴下部を備えた請求項１に記載の印刷用スクリーンの清掃装置。The printing screen cleaning device according to claim 1, further comprising a solvent dripping unit that impregnates the wiping unit by dripping the solvent while horizontally moving relative to the wiping unit. 印刷に用いるスクリーンの付着物を拭取部で拭き取って、吸引部で吸引することにより、前記スクリーンを清掃する方法であって、
前記拭取部には、前記付着物を拭き取るための布が着脱可能に装着されており、
前記拭取部及び吸引部を退避位置から前記スクリーンに水平移動させ、
前記拭取部を垂直移動させて前記スクリーンの裏面に接触させ、
前記拭取部を所定の経路で水平移動させて前記付着物を拭き取り、
前記拭取部を垂直移動させて前記スクリーンから離すと共に前記吸引部を垂直移動させて前記スクリーンの裏面に接触させ、
前記吸引部を水平移動させて前記付着物を吸引し、
前記吸引部を垂直移動させて前記スクリーンから離す
ことを特徴とする印刷用スクリーンの清掃方法。It is a method of cleaning the screen by wiping off deposits on the screen used for printing with a wiping unit and sucking with a suction unit,
A cloth for wiping off the deposit is detachably attached to the wiping portion,
Moving the wiping part and the suction part horizontally from the retracted position to the screen;
Move the wiping part vertically to contact the back of the screen,
The wiping part is moved horizontally along a predetermined path to wipe off the deposits,
Move the wiping part vertically away from the screen and move the suction part vertically to contact the back of the screen,
The suction part is moved horizontally to suck the deposit,
A method for cleaning a printing screen, wherein the suction part is moved vertically away from the screen. 前記布は、複数の拭取面を有しており、
前記布における前記複数の拭取面のうち一の拭取面による拭取動作を所定回数完了後、前記拭取部を回転させて前記布における前記複数の拭取面のうち他の拭取面に交替させる請求項４に記載の印刷用スクリーンの清掃方法。 The cloth has a plurality of wiping surfaces;
The wiping operation by one wiping surface among the plurality of wiping surfaces in the cloth is completed a predetermined number of times, and then the wiping portion is rotated to another wiping surface among the plurality of wiping surfaces in the cloth. The method for cleaning a printing screen according to claim 4 , wherein the printing screen is replaced with a new one. 前記拭取部を前記退避位置から前記スクリーンに近づける前に、溶剤を滴下することにより当該溶剤を前記拭取部に含浸させ、その後に、前記拭取部を前記スクリーンに近づける請求項４に記載の印刷用スクリーンの清掃方法。Before closer to the screen the wiper portion from said retracted position, by the dropwise addition of a solvent is impregnated with the solvent to the wiping section, then, according to claim 4, closer to the wiper unit to the screen To clean the screen for printing.
JP35135698A 1998-12-10 1998-12-10 Cleaning device and cleaning method for printing screen Expired - Fee Related JP4089058B2 (en)

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