JP7023983B2 - 包装材料料をシールするための誘導加熱回路の制御方法 - Google Patents
包装材料料をシールするための誘導加熱回路の制御方法 Download PDFInfo
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- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
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- B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
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- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
- B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
- B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
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- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
- B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
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Description
Claims (15)
- 包装材料(107)をシールするための、可変負荷を有する誘導加熱回路(100)を制御するための方法(400)において、前記誘導加熱回路は、前記可変負荷に連結された誘導発電装置(101)を有し、前記方法は、
前記誘導加熱回路内の少なくとも1つのインダクタ(106)上に少なくとも2つの周波数のAC電源を発生させるステップ(401)と、
前記少なくとも2つの周波数で発生した電流の結果として前記誘導加熱回路内に生じた位相シフト(φ)を特定するステップ(402)と、
前記少なくとも2つの周波数の各々に関する前記誘導加熱回路のインピーダンス(z)を特定するステップ(403)と、
前記特定されたインピーダンスと前記特定された位相シフトとの関係に基づいて、前記誘導加熱回路の負荷特性を特定するステップ(404)と、
インピーダンス動作範囲(zmin、zmax)を特定するステップ(405)と、
前記負荷特性に基づいて、設定理想値からの位相シフト量が最小となり、前記インピーダンス動作範囲内にあるインピーダンスに関連付けられる、前記誘導発電装置のためのAC出力周波数を選択するステップ(406)と、
を含む方法。 - 前記選択された周波数及び関連するインピーダンスについて、前記少なくとも1つのインダクタでの電力出力セットポイントを特定するステップ(407)と、
前記少なくとも1つのインダクタで前記特定されたセットポイントでの電力を出力するように、前記発電装置の電圧を変化させるステップ(408)と、
を含む、請求項1に記載の方法。 - 前記少なくとも1つのインダクタで電力を出力する間に、前記選択された周波数に関連する前記誘導加熱回路における前記位相シフトからの位相偏差を特定するステップ(409)と、
前記位相偏差を最小にするために、前記選択された周波数を変化させるステップ(410)と、
を含む、請求項2に記載の方法。 - 前記位相偏差を最小化するために前記選択された周波数を変化させるステップは、前記誘導加熱回路内の前記インピーダンスが前記インピーダンス動作範囲内に保たれている間に継続され、前記方法はさらに、
前記誘導加熱回路内の前記インピーダンス動作範囲からのインピーダンス偏差を特定するステップ(411)と、
前記インピーダンス偏差を最小化するために、前記選択された周波数を変化させるステップ(412)と、
を含む、請求項3に記載の方法。 - 前記位相シフト及び前記インピーダンスの前記特定を、発電が開始された開始時間(t0)から所定のオフセット時間(tt)遅延させるステップ(413)
を含む、請求項1に記載の方法。 - 前記誘導加熱回路内の少なくとも1つのインダクタ上で少なくとも2つの周波数のAC電源を発生させるステップは、
開始周波数(fs)から終了周波数(fe)の周波数範囲にわたる周波数掃引を発生させるステップ(414)と、
前記周波数範囲にわたる前記それぞれの周波数について、前記誘導加熱回路に結果として生じた前記位相シフトとインピーダンスに基づいて、負荷特性範囲を特定するステップ(415)と、
を含む、請求項1に記載の方法。 - 前記誘導加熱回路は複数のインダクタを含み、前記複数のインダクタの各々について、前記方法は、
周波数掃引を生じさせるステップ(414)と、
前記負荷特性を特定するステップ(415)と、
出力周波数を選択するステップ(406)と、
前記複数のインダクタのうちの対応するインダクタに送達されたAC電源の次のパルスについて、前記対応するインダクタに関する、以前に記憶された出力周波数の値を入力として読み出し(416)、AC電源の前記次のパルスのための出力周波数を選択するステップ(416)と、
を含む、請求項6に記載の方法。 - 前記複数のインダクタの各々のための周波数掃引を生じさせるステップは、
前記複数のインダクタの各々において前記パルスの持続時間にわたり前記開始周波数から前記終了周波数まで変化する周波数のAC電源のパルスを発生させるステップ(417)と、
各々が、前記複数のインダクタの各々において、前記開始周波数から前記終了周波数の前記範囲の間の固定周波数を有するAC電源のパルスを発生させるステップ(418)と、
を含む、請求項7に記載の方法。 - 前記少なくとも1つのインダクタは、前記誘導加熱回路の前記負荷に貢献する導電性材料(107)に磁気により連結され、前記方法は、
少なくとも2つの連続するAC電源パルスに応答して、前記少なくとも1つのインダクタと前記導電性材料を含む前記誘導加熱回路の前記インピーダンスを特定するステップ(419)を含み、関連するインピーダンスの各々は、前記対応するパルスの前記開始から遷移期間(tt)後に特定され、前記遷移期間は、前記導電性材料が前記誘導加熱に応答して所定の加熱状態に到達するまでの期間に対応する、
請求項1に記載の方法。 - 前記導電性材料から前記負荷への前記貢献を特定するステップ(420)と、
前記貢献の負荷値の範囲を特定して、前記導電性材料のための負荷閾値を設定するステップ(421)と、
前記負荷閾値からの偏差を検出して、前記導電性材料の材料特性の変化を通知するステップ(422)と、
を含む、請求項9に記載の方法。 - コンピュータプログラム製品において、前記プログラムがコンピュータにより実行されると、前記コンピュータに請求項1~10の何れか1項に記載の前記方法の前記ステップを実行させる命令を含むコンピュータプログラム製品。
- 包装材料をシールするための、可変負荷を有する誘導加熱回路(100)を制御する制御装置(200)において、前記誘導加熱回路は、前記可変負荷に連結された誘導発電装置(101)を有し、前記制御装置は、
前記発電装置を制御して、前記誘導加熱回路内の少なくとも1つのインダクタ(106)上に少なくとも2つの周波数のAC電源を発生させる電源制御ユニット(201)と、
前記少なくとも2つの周波数で発生された電流の結果として前記誘導加熱回路内に生じた位相シフトを特定する位相検出ユニット(202)と、
前記少なくとも2つの周波数の各々に関する前記誘導加熱回路のインピーダンスを特定するインピーダンス検出ユニット(203)と、
処理ユニット(204)であって、
前記特定されたインピーダンスと前記特定された位相シフトとの関係に基づいて、前記誘導加熱回路の負荷特性を特定し(404)、
インピーダンス動作範囲を特定し(405)、
前記負荷特性に基づいて、設定理想値からの位相シフト量が最小となり、前記インピーダンス動作範囲内にあるインピーダンスに関連付けられる、前記誘導発電装置のためのAC出力周波数を選択する(406)
処理ユニット(204)と、
を含む制御装置(200)。
- 前記誘導加熱回路は複数のインダクタを含み、
前記電力制御ユニットは、前記インダクタの各々において、開始周波数(fs)から終了周波数(fe)の周波数範囲にわたる周波数掃引を生じさせ、
前記処理ユニットは、前記周波数範囲にわたる前記それぞれの周波数について、結果として生じた前記位相シフトとインピーダンスに基づいて、前記インダクタの各々の負荷特性範囲を特定する、
請求項12に記載の制御装置。 - シーリングエッジに沿って導電性材料の部分を含む包装材料(107)をシールするための、請求項1~10の何れか1項に記載の方法の使用。
- 前記包装材料の前記負荷特性に基づいて、化学的又は機械的特性等の包装材料の材料特性を特定するための、請求項1~10の何れか1項に記載の方法の使用。
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