JP4437133B2 - 密封工程検査デバイス - Google Patents
密封工程検査デバイス Download PDFInfo
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
Description
加熱密封の工程中、パッケージの(2枚以上の)熱可塑性フィルムが互いに接触状態にされ、フィルムの融解が達成されるように温度が高められる。フィルムが接触状態にされ、互いに押圧される2つ以上の密封体の間にフィルムを配置することによって圧力が加えられる。実際に密封体を移動させるために、回転シャフト又は空気圧/油圧シリンダのような異なる機構が使用される。更に、温度を高めるための方法も装置の種類によって異なることがある。それは特に、回転輪、抵抗素子、誘電体によって、又は超音波振動によって達成可能である。密封工程には常に密封体の少なくとも1つの移動が含まれるので、機械類の磨耗は避けられない。(例えばベアリング内の、又は密封体上の)この磨耗度は密封工程の特性に影響し、機械類の状態は適切に監視される必要がある。密封品質は処理温度、熱可塑性フィルムに加わる圧力、密封体の清浄度、密封体に対するフィルムの位置決め、フィルムの品質及びパッケージ化される材料によっても影響される。これらの要因の他、熱可塑性フィルムの間、又はフィルムと密封体との間に異物があると、明らかに密封品質に影響する。密封装置の動作と効果に影響する動的変数がこのように多数あるによって、密封時の密封デバイスの動作状態の監視に基づいて密封品質を予測することが不可能であった。実際は、市販の様々な密封検査システムはパッケージの特性の監視に基づいて密封品質を評価する。このような検査デバイスは3種類に区別することができる。(1)パッケージに非破壊的な圧力を加え、その測定を2つの異なる時点で繰り返すことに基づく密封検査システム。パッケージが気密ではない場合は、空気がパッケージから漏れ出すので、これらの2つの時点での測定値の差が報知される。[パッケージング・テクノロジー&インスペクションhttp://www.ptipacktech.com/inspection/foodpackages/pressuretesting.cfm](2)パッケージ又は密封の画像が撮影され、分析されるカメラ・ビジョン検査システム。[パーセプティックス、http://www.perceptics.com/sealsafe_pouch.html](3)密封のフィンガープリントを作成する超音波検査システム[パッケージング・テクノロジー&インスペクションhttp://www.ptipacktech.com/inspection/foodpackages/sealintegritytesting.cfm]
本発明による密封検査を備える密封デバイスが構成された(図1)。この構成は下記の要素からなっている。
密封機構(ロベマ、VPK連続動作袋詰め機 360型)は密封時に互いに接触し、密封されるパッケージが間に配置される2つの密封体を備えている。所与のパッケージの密封品質を評価するため、密封期間、すなわち移動する2つの密封体が衝突する期間中に密封体の動作状態が監視された。この特定の実施例では、密封体の動作状態を監視するために、密封期間中に発される音響信号が利用された。しかし、密封体によって発される音響信号は密封体の振動を反映することが当業者には理解されよう。したがって、音響信号を測定することの代替は、例えば加速度計又はレーザー振動計を使用して密封体の振動を測定することである。
センサが密封デバイスの密封体の近傍に設置され(マイクロフォンの場合)、密封体に取付けられ(加速度計の場合)、又は密封体に向けられた(レーザー振動計の場合)。上記のように、この特定の実施例ではマイクロフォンが使用された。
マイクロフォンによって捉えられた信号がパーソナル・コンピュータのようなデジタル処理ユニットで分析された。データ分析には下記の工程が含まれた。
次に、密封体の動作状態を特徴付ける物理的パラメータがニューラル・ネットワーク、再帰最小二乗法などのような自習アルゴリズムに送られる。所与の密封デバイス及び密封されるパッケージについて、パラメータの事前確率が一旦入力される。この事前確率は密封ブロックの動作状態に関する事前知識に基づくものであってよい。第1のパッケージの密封品質の査定用に事前確率が利用される。それ以降は学習が開始され、事前確率が更新される。自習システムは密封体の実際の動作状態を継続的の監視し、密封が良好である場合はこのような良好な密封の平均の物理的パラメータを更新することによって、この動作状態を、またこれらの値が平均値の周辺にいかに分散しているかを「学習」する。このアルゴリズムは実際の密封品質が良好な密封からどの程度隔たっているかを示す1セットの数値を作成する。オペレータは等級を落とす必要がある欠陥の重大さに関する閾値lをコンピュータ・ユニットに入力するだけでよい。
ベクトルとが更新される。平均特徴ベクトルは、
パッケージの保護された密封品質が所望の品質以下であるという信号を分類ユニットが発信すると、空気圧バルブのような排除デバイスに結合された遅延ユニットに信号が送られる。この遅延ユニットはプリセットされた秒数だけ排除信号を遅延させることで、不良パッケージがバルブの前にきた時点でバルブを開く。バルブの開放時間はパッケージが生産ラインから除去されるように調整可能である。
2.新規の信号ynewを収集し、エネルギ含量enewを計算する。このエネルギ含量は例えば信号の変数として定義可能である。
Claims (17)
- 少なくとも2つの衝突密封体を備えた熱密封装置を使用して密封されたパッケージの密封品質を検査する方法であって、前記パッケージの密封中の前記衝突密封体のアコースティックエミッションまたは振動の監視をすることおよび前記監視に基づいたパッケージの密封品質を決定することを含む方法において、
前記方法は、
(i)前記パッケージの前記密封中に前記衝突密封体のアコースティックエミッションまたは振動に関するデータを取得する工程と、
(ii)少なくとも前記(i)のデータの選択を利用して前記衝突密封体のアコースティックエミッションまたは振動を特徴付ける少なくとも1つのパラメータの平均及び分布を計算する工程と、
(iii)前記(ii)で算定された平均及び分布を利用して前記密封体のアコースティックエミッションまたは振動を特徴付ける前記パラメータの、受け入れ可能な最低限の密封品質に関連する基準値を計算する工程と、
(iv)所与のパッケージの前記密封中に前記衝突密封体のアコースティックエミッションまたは振動に関するデータを収集し、かつ前記パッケージの前記密封中に前記密封体のアコースティックエミッションまたは振動を特徴付ける前記パラメータ値を算定する工程と、
(v)前記パッケージの品質を判定するために前記(iv)の工程で算定された前記パラメータ値を前記基準値と比較する工程と、
(vi)前記衝突密封体のアコースティックエミッションまたは振動を特徴とする前記工程(ii)におけるパラメータの平均および分布におけるデータの進展にしたがって前記工程(iii)において算出された基準値を連続的に更新する工程
を含む方法。 - 前記パッケージの密封中に前記衝突密封体のアコースティックエミッションまたは振動を表す前記少なくとも一つのパラメータの前記平均及び分布の前記計算に、前記基準値の範囲内にある前記パラメータの算定値だけが利用される請求項1に記載の方法。
- 前記パッケージの密封中に前記衝突密封体のアコースティックエミッションまたは振動を特徴付ける前記パラメータの前記平均及び分布の前記計算に際して、1つ又は複数の重み係数が所与のパッケージの前記密封中に算定された前記パラメータの値の重みを規定する請求項1または2に記載の方法。
- 前記重み係数は先行のパッケージの前記密封中に算定された前記値の前記重みを前記密封されたパッケージの前記密封中に算定された前記パラメータと比較して低減する請求項3に記載の方法。
- 前記基準値の前記計算は、前記平均密封品質からの許容偏差に対応する値を算入する請求項1から4までのいずれかに記載の方法。
- 前記平均密封品質からの許容偏差に対応する前記値がプリセットされる請求項5に記載の方法。
- 前記平均密封品質からの許容偏差に対応する前記値を、前記密封品質を監視する所望の厳密さに応じて修正可能である請求項5に記載の方法。
- 前記密封体の振動に関するデータが前記密封体上に先きを付けるレーザー振動計を使用して収集される請求項1から7までのいずれか1項に記載の方法。
- 前記密封体の振動に関するデータが密封体上に取り付けられた加速度計を使用して収集される請求項1から7までのいずれか1項に記載の方法。
- 前記密封体の振動に関するデータは加速度計を使用して収集される請求項1から7までのいずれか1項に記載の方法。
- パウチ、ピローバッグ、スタンドパウチ及びブリスター・パッケージからなる群から選択されたパッケージの密封品質の監視のための、請求項1から10までのいずれか1項に記載の方法。
- 前記パッケージは固体、液体、気体又はそれらの組合せを収納する請求項1から11までのいずれか1項に記載の方法。
- 請求項1から請求項12までのいずれか1項に記載の方法による熱密封装置を使用して密封されたパッケージの密封品質を検査するデバイスであって、該ディバイスが密封ブロックに取付けられた少なくとも2つの衝突密封体および少なくとも1つの加速計を含み、該加速度計がコンピュータ・ユニットに接続されたデバイス。
- 請求項1から請求項12までのいずれか1項に記載の方法による熱密封装置を使用して密封されたパッケージの密封品質を検査するデバイスであって、該ディバイスが密封ブロック上に先きを付けられた少なくとも2つの密封体および少なくとも1つのレーザー振動計を含み、該レーザー振動計がコンピュータ・ユニットに接続されたデバイス。
- 低品質の密封を有するパッケージを排除可能な排除ユニットを備える請求項13または14に記載のデバイス。
- ポーチ、ピローバッグ、スタンドポーチ及びブリスター・パッケージからなる群から選択されたパッケージの密封品質の監視のための、請求項13または14に記載のデバイスの利用。
- 前記パッケージは固体、液体、気体又はそれらの組合せを収納する請求項13または14に記載のデバイスの利用。
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GBGB0310425.4A GB0310425D0 (en) | 2003-05-07 | 2003-05-07 | Inspection system for sealed packages |
PCT/BE2004/000068 WO2004099751A2 (en) | 2003-05-07 | 2004-05-07 | Sealing process inspection device |
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SG10201501672PA (en) * | 2015-03-05 | 2016-10-28 | Emage Vision Pte Ltd | Inspection of sealing quality in blister packages |
US10822150B2 (en) | 2015-06-03 | 2020-11-03 | Bemis Company, Inc. | Package for indicating heat-seal condition |
DE102016213434A1 (de) | 2016-05-18 | 2017-11-23 | Robert Bosch Gmbh | Verfahren zum Versiegeln einer Verpackung |
CN110049877A (zh) | 2016-12-02 | 2019-07-23 | 比密斯公司 | 用于指示热密封条件的包装 |
CA3117770A1 (en) | 2018-12-21 | 2020-06-25 | Cytiva Sweden Ab | A sealing system for sealing a tube and an automated method of operating the same |
CN109991314B (zh) * | 2019-03-11 | 2020-12-29 | 清华大学 | 基于机器学习的机械密封状态判断方法、装置 |
JP2022089044A (ja) | 2020-12-03 | 2022-06-15 | Pacraft株式会社 | 袋シール装置及び袋シール方法 |
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US7673498B2 (en) | 2010-03-09 |
EP1620707A2 (en) | 2006-02-01 |
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JP2006525493A (ja) | 2006-11-09 |
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