JP2004292000A - Manufacturing method for container with content - Google Patents

Manufacturing method for container with content Download PDF

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Publication number
JP2004292000A
JP2004292000A JP2003085703A JP2003085703A JP2004292000A JP 2004292000 A JP2004292000 A JP 2004292000A JP 2003085703 A JP2003085703 A JP 2003085703A JP 2003085703 A JP2003085703 A JP 2003085703A JP 2004292000 A JP2004292000 A JP 2004292000A
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JP
Japan
Prior art keywords
container
lid
sealing
heating
heat
Prior art date
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JP2003085703A
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Japanese (ja)
Inventor
Mitsuhiro Sawada
光弘 澤田
Shoichi Inaba
正一 稲葉
Hideo Kurashima
秀夫 倉島
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Toyo Seikan Group Holdings Ltd
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Toyo Seikan Kaisha Ltd
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Publication date
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Priority to JP2003085703A priority Critical patent/JP2004292000A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a container with a content which makes sagging or wrinkles hard to occur when a lid material is sealed on the opening part of the molded container even when the sealing is performed under a state wherein the temperature of the content is low without using steam for producing a high temperature high humidity environment. <P>SOLUTION: The container 6 is sealed by heat-sealing the lid material 8 on the periphery of the opening part 6a of the container 6 containing the content 7. In this case, the internal region 31 of a sealing region which is fixed to a flange part 6a of the container 6 by a first seal or a second seal of the lid material 8 is heated by an internal heating member 32. The heated lid material 8 shrinks at the time of cooling, but at that time, tension is applied to the lid material 8 due to the pressure of the external air, and sagging or wrinkles are solved by the tension, and the appearance can be improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、内容物が入れられたカップ、トレイ状等の容器に蓋材をシールして封鎖する内容物入り容器の製造方法に関する。
【0002】
【従来の技術】
従来、固形食品の包装としては、内容物を容器に移載し、容器の開口周囲に形成されるフランジ部にプラスチックフィルム等の蓋材をヒートシールする方法が用いられている。内容物が高温であるときに封鎖用のシールが行われれば、その後、冷却したときに、容器内において内容物の上部に残されるヘッドスペースに存在する気体の圧力が低下しようとするので、外気圧力とのバランス上、蓋材に容器の内方に向かう圧力が作用し、シール時にフィルム製の蓋にタルミやシワが生じていても、そうしたタルミやシワは蓋材に作用する張りによって自然に解消される。しかしながら、内容物表面が冷えやすい場合や、包装工程上の何らかの理由による一時停止の状態等においては、内容物を高温に保つことは難しい。この場合、容器内において内容物の上部に残されるヘッドスペースの気体量が減少しないために蓋材に張りが生じず、シール時に生じた蓋材のタルミやシワが解消されずに残り、外観上、商品価値が低くなってしまう。
【0003】
蓋材をシールする前に、内容物をスチームで加熱する方法も考えられる。空間部を残して内容物が充填された容器本体に、スチームを吹き込んで内容物の表面近傍のみを加熱し次いで不活性ガスを吹き込んで、或いは水蒸気と不活性ガスの混合気を吹き込むことによって、空間部における残存空気を不活性ガスとスチームとで置換し、その後直ちに蓋材により容器本体を密封して容器内の空間部に残る酸素量を微量とすることが提案されている。内容物の表面のみを加熱したスチームは、潜熱を奪われて凝結し、水滴として内容物の表面に付着する。凝結水は密封までの短時間の間にも蒸発してスチームとなり、容器の密封後、室温まで冷却される途中でこのスチームが凝縮して、容器内部を負圧にする。
【0004】
このとき、容器は、スチームが水滴等に凝縮することで内容積が減少し、内外の圧力バランスが釣り合う位置まで、通常、底壁や蓋部等の比較的撓み易い部分を若干撓ませたり、外気圧によって蓋材を容器内部側に凹ませることも行われている。容器や蓋材が内側に凹むことにより、品質の劣化による容器の膨張がないことをアピールすると共に、蓋材に張力を与えて外観を良くすることが期待される。また、内容物の表面がスチームによって殺菌され、かび等の菌が繁殖し難くなる。更に、ヒートシールする前にスチームの噴射で容器を温めることにより、ヒートシールをより安定させることができる。
【0005】
しかしながら、充填密封後に熱殺菌を行わない無菌製造ラインにおけるクリーンルーム内において、スチームの吹きかけ量が大量となると、スチームの工場内への漏れを完全に遮断することが困難であるため、工場内部が高温多湿となって乾燥している状態より細菌が繁殖しやすい環境となり好ましくない。さらに、検品機等が配置されている場合には、高温多湿の環境は検品機等に使用されているコンピュータ等への影響も考えられる。
【0006】
一方、加工食品や水産物練り製品等の定形品の包装は、そうした定形品の寸法の多少のバラツキ等が原因になって、真空包装時にフィルム製容器のしわが発生しているが、深絞り真空成型機内で真空包装された定形物の包装体表面のフィルムのしわのある部分にのみ熱風を当てて、しわのない部分はそのままの形状で冷却保護し、包装体の形状が崩れない、しわのない外観良好な包装体を作るべく、深絞り真空成型機内に設けられたしわ取り装置が提案されている(特許文献1参照)。
【0007】
【特許文献1】
特開平4−31218号公報(第2頁右上欄、第3頁左下欄〜第4頁
右下欄、図1)
【0008】
【発明が解決しようとする課題】
そこで、容器の開口部の周囲を蓋材でシールする時に生じたタルミやシワを、蓋材の周囲を固定した状態で熱的処理を施して蓋材に張力を生じさせることにより、解消する点で解決すべき課題がある。
【0009】
この発明の目的は、凝縮による圧力の低下が期待できる反面、高温多湿の環境を作ってしまうスチームを用いることなく、且つ低温でのシールであっても、蓋材を容器の開口部にシールをするときに生じやすいタルミやシワを効果的に解消することを可能にする内容物入り容器の製造方法を提供することである。
【0010】
【課題を解決するための手段】
上記の課題を解決するため、この発明による内容物入り容器の製造方法は、内容物が投入された容器の開口部の周囲に蓋材をヒートシールすることによって前記容器を封鎖するに際して、前記蓋材のシール領域で囲まれる内側領域を加熱部材にて加熱することから成っている。
【0011】
この内容物入り容器の製造方法によれば、容器に内容物を投入後、蓋材を容器の開口部の周囲においてヒートシールするが、このとき、蓋材のシール領域で囲まれた内側領域を加熱部材にて加熱する。周囲がシール領域で固定された状態で加熱された蓋材には、冷却する時の収縮によって張力が作用するので、ヒートシールされた蓋材に生じる可能性が有り外観を損なうタルミやシワが解消される。
【0012】
内容物入り容器の製造方法においては、容器を搬送しながら内容物を投入し、容器の開口部の周囲において蓋材が、第1シール部と第2シール部とでヒートシールされる。2回のシールを行う目的は、第1のシール時に水分等がシール部に存在し、シール強度が不足している場合においても、第2のシールを行うことにより必要十分なシール強度を得ることにある。第1シールも第2シールも容器は同じ搬送部材により位置決めをされた上で搬送されるので、蓋材の内側領域の加熱についても第1シールや第2シールを行う工程に組み入れることにより、異なる装置で再位置決めして加熱する必要がなくなり、装置のコストを低く抑えることができる。そこで、この内容物入り容器の製造方法において、前記内容物の投入と前記蓋材のヒートシールとを前記容器が搬送される搬送経路の途上で行い、前記加熱部材による前記蓋材の前記内側領域の加熱を、搬送方向の上流側に配置され且つ前記シール領域として前記蓋材の第1シール部において行うことができる。第1シール部において蓋材の加熱を行う場合には、第1シールによって固定された部分よりも内側領域が冷却に伴って収縮し、タルミやシワを解消させる。
【0013】
また、前記内容物の投入と前記蓋材のヒートシールとを前記容器が搬送される搬送経路の途上で行い、前記加熱部材による前記蓋材の前記内側領域の加熱を、搬送方向の下流側に配置され且つ前記蓋材にシール領域を形成する第2シール部において行うことができる。第2シール部において蓋材の内側領域の加熱を行うことにより、周囲が確実に固定された蓋材の内側領域は冷却時に収縮することになり、タルミやシワを効率良く且つ効果的に解消することができる。
【0014】
この内容物入り容器の製造方法において、前記蓋材の前記内側領域の加熱を、前記蓋材のヒートシールとタイミングをずらせて行うことができる。特に、蓋材の内側領域の加熱を蓋材のヒートシールの後に行えば、ヒートシールによって固定された蓋材の内側領域をシールに遅れて加熱し、更にその後に冷却することになるので、タルミやシワの解消をより効果的に行うことができる。
【0015】
この内容物入り容器の製造方法において、前記蓋材の前記内側領域の加熱を、前記蓋材のヒートシールの温度とは異なる温度で行うことができる。蓋材の内側領域の加熱温度をヒートシールの温度と異ならすことにより、蓋材の材料に応じた最適な温度で加熱することができる。
【0016】
この内容物入り容器の製造方法において、前記加熱部材を、前記蓋材をヒートシールするヒートシーラとは独立して作動させることができる。加熱部材の作動をヒートシーラとは独立して行うことにより、温度のみならず、ヒートシールのタイミング等の作動条件とは異なる作動条件で加熱部材を作動させることにより、蓋材の材料に応じた最適な条件での加熱が可能になる。
【0017】
【発明の実施の形態】
以下、添付した図面に基づいて、この発明による内容物入り容器の製造方法の実施例を説明する。図1はこの発明による内容物入り容器の製造方法を実施する装置の側面概略図、図2は図1に示す装置の要部を拡大して示す側面図、図3は図1に示す包装装置のA−A断面図、図4は図3に示す包装装置の加熱部材の別の作動状態を示す断面図である。
【0018】
図1に示す包装装置は、無菌充填シール工程に適用されており、ポリプロピレン等の熱溶着性又はその処理を施した合成樹脂製であってトレイ状に成型された容器6(一部にのみ符号を付す。)に内容物7(図2参照)を充填し、内容物7入りの容器6の内部を窒素ガス等の不活性ガスでガス置換した状態で、熱溶着性又はその処理を施した合成樹脂フィルムから成る蓋材8をヒートシールして内容物入り容器6を封鎖するガス置換包装装置1である。ガス置換包装装置1は、搬送方向で見て順に、容器及び内容物移載ステーション2、スチームの吹きかけと置換ガスとして不活性の窒素ガスの吹きかけとを行うチャンバステーション3、内容物7入りの容器6に蓋材8をヒートシールする封鎖ステーション4、及び蓋材8で封鎖された内容物7の包装体9を取り出す包装体取出しステーション5を備えている。
【0019】
容器及び内容物移載ステーション2は、容器6の移載部2aと、その下流側に位置し内容物7を充填する内容物充填部2bとを備えた無菌の閉鎖空間として構成されている。容器及び内容物移載ステーション2は、図示しないが全体としてチャンバに囲まれており、内部には無菌空気が供給され、容器6は無菌乾燥される。移載部2aにおいては図示しない容器供給機構によって容器6が後述する受け台16上に供給される。受け台16に載せられた容器6には、内容物充填部2bにおいて内容物7が充填される。
【0020】
チャンバステーション3は、内容物7入りの容器6にスチームと不活性ガスとしての窒素ガスとの吹きかけを行うステーションであり、窒素が内部に供給されるとともに適宜に排気され、内部を純度の高い窒素ガス雰囲気にすることで、ガス置換が行われる。チャンバステーション3においては、チャンバ10が配設されており、その内部を受け台16に支持された容器6が順次搬送される。
【0021】
上記の容器及び内容物移載ステーション2、チャンバステーション3、封鎖ステーション4、及び包装体取出しステーション5の各ステーションは、例えば、チェーンを使用した搬送装置15の上側走行部15eの搬送経路に沿って順に配置されている。搬送装置15は、駆動スプロケット15a、従動スプロケット15b、及び駆動スプロケット15aと従動スプロケット15bとに巻き掛けられたチェーン15c(図3及び図4参照)からなり、上側走行部15eを搬送される間にチェーン15cに備わる受け台16に支持することで容器6を搬送する。受け台16は、その後、下側走行部15fを搬送される間に、適宜に洗浄・乾燥され、上側走行部15eに戻った位置で容器及び内容物移載ステーション2に搬入される。
【0022】
封鎖ステーション4は、蓋材8が巻き取られた蓋材ロール12と、蓋材8を切断することで生じた蓋材余剰部8aを巻き取る余剰蓋材巻取り部13とを備えており、蓋材ロール12と余剰蓋材巻取り部13との間にシール機構20が配設されている。蓋材8は、ヒートシール前にUVランプ(図示せず)によって殺菌処理される。シール機構20は、上流側から順に、蓋材ロール12から繰り出された蓋材8を、内容物7入りの容器6の開口部の周囲に環状に形成されるフランジ部6aにおいて、開口部6bを取り囲む環状のヒートシール予定部分に予めシールを施す第1シール部21と、第1シール部21の後流側に配置された第2シール部22と、第2シール部22の後流側に配置されてヒートシールされたシール領域を冷却する冷却部23と、冷却部23の後流側に配置され且つ各容器6毎に蓋材8をトリミングする蓋材カット部24とを備えている。
【0023】
図2には、図1に示したガス置換包装装置1のシール機構20の要部が示されている。図2のA−A断面である図3も併せて参照すると、搬送装置15に備わる左右一対のレール17,17上を走行可能な図示されていないチェーンに接続されている受け台16に支持された状態で縦列に並んで搬送されている容器6には、シール機構20に進入する直前において、上方から供給される蓋材8が押し当てローラ18によって連続して覆い被せられる。第1シール部21では、蓋材8が覆い被せられた直後において、容器6のフランジ部6aに対して開口部6bを取り囲む環状のヒートシール予定部分に第1シールが施される。
【0024】
第1シール部21には、内容物7が投入された容器6の開口部6bの際に位置する環状領域30でシールをするヒートシーラとしての外側加熱部材25が設けられている。図3に示すように、外側加熱部材25を構成する環状部材の外側の更に進行方向に対して左右の外側には、蓋材8を容器6のフランジ部6aに押さえつける押し当て部材27,27が設けられている。各押し当て部材27にはエア供給管28が接続されており、押し当て部材27の先端部27aにノズル29が開口している。各ノズル29から吹き出されるエアが蓋材8の左右両縁部に対して吹き付けられ、エアの圧力によって蓋材8が容器6のフランジ部6aに押さえ付けられる。
【0025】
外側加熱部材25の内側には、蓋材8について環状領域30の内側領域31を加熱する内側加熱部材(本発明における加熱部材に相当)32が設けられている。蓋材8の内側領域31の加熱は、第1シールにおける加熱と同様に蓋材8の加熱処理であるので、第1シールと組み合わせることができる。この例では、内側加熱部材32は、内側領域31を全面に渡って加熱する加熱盤としての構造を有し、外側加熱部材25とは別に構成されており、内側加熱部材32の温度設定についても外側加熱部材25とは別に設定可能として、蓋材8の材料に応じた最適な温度で加熱可能とするのが好ましい。
【0026】
図4には、外側加熱部材25と内側加熱部材32とが別々に作動される様子が示されている。即ち、外側加熱部材25をシリンダ33と一体に構成し、内側加熱部材32をシリンダ33内で変位するピストンとして構成することにより、内側加熱部材32を任意のタイミングで蓋材8に接近・離間させて蓋材8を適宜に加熱することができる。このように構成することにより、内側加熱部材32は、蓋材8をヒートシールする外側加熱部材25とは独立して作動される。その結果、温度のみならずタイミング等の作動条件においても、外側加熱部材25とは異なる作動条件で内側加熱部材32を作動させることが可能となり、蓋材8を材料に応じた最適な条件で加熱することができる。
【0027】
作動条件の一つとしての加熱タイミングについては、蓋材8の内側領域31の加熱を蓋材8のヒートシールに対してタイミングをずらせることが挙げられる。特に、蓋材8の内側領域31の加熱を蓋材8のヒートシールの後に行えば、ヒートシールによって固定された蓋材8の内側領域31をシールに遅れて加熱し、更にその後に冷却することになるので、蓋材8に生じるタルミやシワの解消をより効果的に行うことができる。
【0028】
この製造方法によれば、内容物7が容器6に投入された後、蓋材8を容器6にヒートシールする際に、蓋材8は、シール領域としての環状領域30の内側領域31が内側加熱部材32にて加熱される。加熱された蓋材8には、冷却する時の収縮によって張力が生じるので、ヒートシールされた蓋材8に生じる外観を損なう可能性があるタルミやシワを解消することができる。
【0029】
蓋材8の内側領域31の加熱を、第1シール部21で行うのに代えて、第1シール部21よりも搬送方向の下流側に配置され且つ蓋材8に第2シールを形成する第2シール部22において行うことができる。第2シール部22において蓋材8の内側領域31の加熱を行うことにより、第1シールで周囲が固定された蓋材8の内側領域31が冷却時に収縮することにより、タルミやシワの解消を効率良く且つ効果的に行うことができる。この場合、内側領域31を加熱する加熱部材は、第1シール部21で行う場合の内側加熱部材32の構造と同様に構成することができる。
【0030】
上記の実施例において、種々の変更、追加が可能である。例えば、容器6は一列に供給されているが、複数列に処理可能に構成することは勿論可能である。上記の例ではガス置換包装として説明したが、ガス置換を行なわない包装にも適用可能である。また、内側領域31の加熱については、全面でなくても、タルミやシワが生じ易い、環状シール部の直ぐ内側の環状領域だけを加熱してもよい。また、内側加熱部材32を外側加熱部材25と一体構造としてもよく、この場合、内側加熱部材32と外側加熱部材25とにおいて蓋材8に対する距離を変えるために、蓋材8に対する面側で段差に形成してもよい。更に、外側加熱部材25と内側加熱部材32との間に断熱材を介在させることによって、外側加熱部材25と内側加熱部材32とによる蓋材8の加熱を、個別に最適温度で且つ最適時間で行うこともできる。
【0031】
【発明の効果】
この発明による内容物入りの容器の製造方法は、上記のように構成されており、内容物が投入された容器の開口部の周囲に蓋材をヒートシールすることによって容器を封鎖するに際して、ヒートシールされた蓋材に生じるタルミやシワを解消するため、蓋材の固定されたシール領域の内側領域を内側加熱部材によって加熱している。加熱された蓋材には冷却時の収縮によって張力が作用し、タルミやシワが解消して外観を改善することができる。また、凝縮による圧力の低下が期待できる反面、高温多湿の環境を作ってしまうスチームを用いていないので、内容物の温度が低温の状態でシールする場合であっても、蓋材を容器の開口部にシールをするときにタルミやシワを生じにくくすることができる。また、蓋材のヒートシールと同時に、同じ搬送部材を使用した高い位置精度をもつタルミやシワを解消するための加熱処理をすることにより、加熱位置を精密に制御することもできる。更に、内側加熱部材による蓋材の加熱温度やタイミングを蓋材のヒートシールとは独立して調整することにより、蓋材の最適加熱の設定が可能である。
【図面の簡単な説明】
【図1】この発明による内容物入り容器の製造方法を実施する装置の側面概略図である。
【図2】図1に示す装置の要部を拡大して示す側面図である。
【図3】図1に示す包装装置のA−A断面図である。
【図4】図3に示す包装装置の加熱盤の別の作動状態を示す断面図である。
【符号の説明】
1 ガス置換包装装置 2 容器及び内容物移載ステーション
3 チャンバステーション 4 封鎖ステーション
5 包装体取出しステーション
6 容器 6a 開口部
7 内容物 8 蓋材 9 包装体
20 シール機構 21 第1シール部 22 第2シール部
30 シール領域 31 内側領域 32 加熱部材
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing a container with contents, in which a lid material is sealed and sealed in a container, such as a cup or tray, in which the contents are placed.
[0002]
[Prior art]
Conventionally, as a method for packaging solid foods, a method has been used in which contents are transferred to a container and a lid member such as a plastic film is heat-sealed on a flange formed around the opening of the container. If the sealing for sealing is performed when the contents are hot, then, when cooling, the pressure of the gas existing in the head space left above the contents in the container tends to decrease, and Due to the balance with the pressure, even if pressure toward the inside of the container acts on the lid material, and if the film lid has tarnish or wrinkles at the time of sealing, such tarmi or wrinkles are naturally caused by the tension acting on the lid material. Will be resolved. However, it is difficult to keep the contents at a high temperature when the surface of the contents is easily cooled or when the contents are temporarily stopped for some reason in the packaging process. In this case, since the amount of gas in the head space left above the contents in the container does not decrease, tension does not occur on the lid material, and the tarnish and wrinkles of the lid material generated at the time of sealing remain without being eliminated, and in appearance, , The commercial value is reduced.
[0003]
Before sealing the lid material, a method of heating the contents with steam is also conceivable. By blowing steam into the container body filled with the contents leaving the space to heat only the vicinity of the surface of the contents and then blowing an inert gas, or by blowing a mixture of steam and an inert gas, It has been proposed to replace the residual air in the space with an inert gas and steam, and then immediately seal the container body with a lid to reduce the amount of oxygen remaining in the space in the container. Steam that has heated only the surface of the content loses latent heat and condenses, and adheres to the surface of the content as water droplets. The condensed water evaporates into steam during a short time until sealing, and after the container is sealed, the steam condenses during cooling to room temperature, and the inside of the container is brought to a negative pressure.
[0004]
At this time, the container is reduced in internal volume by the steam condensing into water droplets and the like, and until the position where the pressure balance between the inside and outside is balanced, usually, a relatively flexible portion such as a bottom wall or a lid portion is slightly bent, In some cases, the lid is depressed toward the inside of the container by external pressure. By indenting the container and the lid material inward, it is expected that the container will not expand due to deterioration in quality and that the lid material will be tensioned to improve the appearance. In addition, the surface of the contents is sterilized by steam, and it becomes difficult for fungi such as mold to propagate. Further, the heat seal can be further stabilized by warming the container with steam before the heat seal.
[0005]
However, in a clean room in a sterile production line in which heat sterilization is not performed after filling and sealing, if the amount of steam sprayed becomes large, it is difficult to completely prevent steam from leaking into the factory. It is not preferable because the environment is more susceptible to bacterial growth than a humid and dry state. Further, when an inspection machine or the like is provided, the high-temperature and high-humidity environment may affect a computer or the like used in the inspection machine or the like.
[0006]
On the other hand, in the packaging of fixed products such as processed foods and kneaded seafood products, wrinkles of the film container are generated during vacuum packaging due to slight variations in the dimensions of such fixed products, but deep drawing vacuum molding Hot air is applied only to the wrinkled parts of the film on the surface of the fixed-form package that has been vacuum-packaged in the machine, and the parts without wrinkles are cooled and protected in the same shape, so that the shape of the package does not collapse or wrinkle-free In order to produce a package having a good appearance, a wrinkle removing device provided in a deep drawing vacuum forming machine has been proposed (see Patent Document 1).
[0007]
[Patent Document 1]
JP-A-4-31218 (page 2, upper right column, page 3, lower left column to page 4, lower right column, FIG. 1)
[0008]
[Problems to be solved by the invention]
Therefore, the point of eliminating the wrinkles and wrinkles generated at the time of sealing the periphery of the opening of the container with the lid material by applying a thermal treatment to the lid material with the periphery of the lid material fixed to generate tension in the lid material. There are issues to be solved.
[0009]
An object of the present invention is to reduce the pressure due to condensation, but without using steam that creates a high-temperature and high-humidity environment, and to seal the lid at the opening of the container even when sealing at a low temperature. It is an object of the present invention to provide a method for producing a container with contents that enables effective removal of walnuts and wrinkles that are likely to occur when the container is filled.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, the method for producing a container with contents according to the present invention is characterized in that when the container is closed by heat-sealing the lid around the opening of the container into which the contents are charged, the lid is sealed. Is heated by a heating member.
[0011]
According to this method for manufacturing a container with contents, after the contents are charged into the container, the lid is heat-sealed around the opening of the container. At this time, the inner region surrounded by the sealing region of the lid is heated. Heat with the member. Tension acts on the lid material that is heated while the surrounding area is fixed in the sealing area due to shrinkage during cooling, which eliminates the appearance of heat-sealed lid material, such as tarmi and wrinkles that impair the appearance Is done.
[0012]
In the method for manufacturing a container with contents, the contents are charged while the container is being conveyed, and the lid material is heat-sealed around the opening of the container by the first seal portion and the second seal portion. The purpose of performing the sealing twice is to obtain the necessary and sufficient sealing strength by performing the second sealing even when moisture or the like is present in the sealing portion during the first sealing and the sealing strength is insufficient. It is in. Since both the first seal and the second seal are transported after the container is positioned by the same transport member, the heating of the inner region of the lid member is also different by incorporating it into the step of performing the first seal and the second seal. There is no need to reposition and heat the device, and the cost of the device can be kept low. Therefore, in this method for manufacturing a container with contents, the charging of the contents and the heat sealing of the lid material are performed in the middle of a transport path along which the container is transported, and the heating member is used to cover the inner region of the lid material. Heating can be performed at the first seal portion of the lid member, which is arranged on the upstream side in the transport direction and serves as the seal region. When heating the lid material in the first seal portion, the area inside the portion fixed by the first seal shrinks with cooling, and eliminates wrinkles and wrinkles.
[0013]
Further, the charging of the contents and the heat sealing of the lid material are performed in the middle of the transport path in which the container is transported, and the heating of the inner region of the lid material by the heating member is performed on the downstream side in the transport direction. This can be performed in a second seal portion that is disposed and that forms a seal region in the lid material. By heating the inner region of the lid material in the second seal portion, the inner region of the lid material, the periphery of which is securely fixed, shrinks during cooling, thereby effectively and effectively eliminating tarmi and wrinkles. be able to.
[0014]
In the method for manufacturing a container with contents, the heating of the inner region of the lid member can be performed at a timing different from that of the heat sealing of the lid member. In particular, if the inner region of the lid material is heated after the lid material is heat-sealed, the inner region of the lid material fixed by the heat seal will be heated later than the seal, and then will be cooled. And wrinkles can be eliminated more effectively.
[0015]
In the method for manufacturing a container with contents, the inner region of the lid may be heated at a temperature different from the temperature of the heat seal of the lid. By making the heating temperature of the inner region of the lid different from the temperature of the heat seal, the heating can be performed at an optimum temperature according to the material of the lid.
[0016]
In this method of manufacturing a container with contents, the heating member can be operated independently of a heat sealer that heat seals the lid. By operating the heating member independently of the heat sealer, it is possible to operate the heating member not only at the temperature but also under operating conditions different from the operating conditions such as the timing of heat sealing, etc. Heating under various conditions becomes possible.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a method for manufacturing a container with contents according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic side view of an apparatus for carrying out the method for producing a container with contents according to the present invention, FIG. 2 is an enlarged side view of a main part of the apparatus shown in FIG. 1, and FIG. FIG. 4 is a cross-sectional view illustrating another operation state of the heating member of the packaging device illustrated in FIG. 3.
[0018]
The packaging apparatus shown in FIG. 1 is applied to an aseptic filling and sealing process, and is made of a synthetic resin such as polypropylene or the like which has been subjected to a heat-sealing process or a synthetic resin-treated resin and molded into a tray-shaped container 6 (only a part of the ) Was filled with the contents 7 (see FIG. 2), and the interior of the container 6 containing the contents 7 was gas-replaced with an inert gas such as nitrogen gas, and then subjected to heat welding or treatment. This is a gas replacement packaging device 1 that heat seals a lid member 8 made of a synthetic resin film to seal a container 6 with contents. The gas replacement packaging apparatus 1 includes a container and contents transfer station 2, a chamber station 3 for performing spraying of steam and an inert nitrogen gas as a replacement gas, and a container for storing contents 7 in order in the transport direction. 6 is provided with a sealing station 4 for heat-sealing the lid 8, and a package removing station 5 for removing the package 9 of the contents 7 sealed with the lid 8.
[0019]
The container and contents transfer station 2 is configured as a sterile closed space including a transfer section 2a of the container 6 and a contents filling section 2b that is located downstream thereof and fills the contents 7. Although not shown, the container and contents transfer station 2 is surrounded by a chamber as a whole, and sterile air is supplied to the inside, and the container 6 is aseptically dried. In the transfer section 2a, the container 6 is supplied onto a receiving table 16 described later by a container supply mechanism (not shown). The container 6 placed on the cradle 16 is filled with the contents 7 in the contents filling section 2b.
[0020]
The chamber station 3 is a station that sprays steam and nitrogen gas as an inert gas onto the container 6 containing the contents 7, and supplies nitrogen to the inside and appropriately exhausts the nitrogen. Gas replacement is performed by setting the gas atmosphere. In the chamber station 3, a chamber 10 is provided, and the containers 6 supported on a receiving table 16 are sequentially transported therein.
[0021]
Each of the above-mentioned container and contents transfer station 2, chamber station 3, closing station 4, and package taking-out station 5 is, for example, along the transport path of the upper traveling portion 15e of the transport device 15 using a chain. They are arranged in order. The transport device 15 includes a drive sprocket 15a, a driven sprocket 15b, and a chain 15c (see FIGS. 3 and 4) wound around the drive sprocket 15a and the driven sprocket 15b. The container 6 is transported by being supported by the receiving table 16 provided in the chain 15c. Thereafter, the cradle 16 is appropriately washed and dried while being conveyed through the lower traveling portion 15f, and is carried into the container and contents transfer station 2 at a position returning to the upper traveling portion 15e.
[0022]
The closing station 4 includes a cover material roll 12 on which the cover material 8 is wound, and a surplus cover material winding unit 13 for winding a cover material surplus portion 8a generated by cutting the cover material 8. A seal mechanism 20 is provided between the lid roll 12 and the surplus lid winding section 13. The lid 8 is sterilized by a UV lamp (not shown) before heat sealing. The sealing mechanism 20 applies the lid material 8 fed from the lid material roll 12 in order from the upstream side to the opening 6b at the flange 6a formed annularly around the opening of the container 6 containing the contents 7. A first seal portion 21 that preliminarily seals a surrounding portion to be heat-sealed, a second seal portion 22 disposed downstream of the first seal portion 21, and a downstream seal portion disposed of the second seal portion 22 The cooling section 23 cools the sealed area that has been heat-sealed, and a lid cutting section 24 disposed downstream of the cooling section 23 and trimming the lid 8 for each container 6.
[0023]
FIG. 2 shows a main part of the sealing mechanism 20 of the gas replacement packaging apparatus 1 shown in FIG. Referring also to FIG. 3, which is a cross section taken along the line AA in FIG. The cover material 8 supplied from above is continuously covered by the pressing roller 18 immediately before entering the sealing mechanism 20 on the containers 6 which are conveyed in tandem in the vertical state. Immediately after the cover member 8 is covered with the first seal portion 21, the first seal is applied to a portion to be annularly heat-sealed around the opening 6 b with respect to the flange portion 6 a of the container 6.
[0024]
The first seal portion 21 is provided with an outer heating member 25 as a heat sealer for sealing in the annular region 30 located at the opening 6b of the container 6 into which the contents 7 are charged. As shown in FIG. 3, pressing members 27, 27 for pressing the lid member 8 against the flange portion 6 a of the container 6 are further provided outside the annular member constituting the outer heating member 25 on the left and right sides with respect to the traveling direction. Is provided. An air supply pipe 28 is connected to each pressing member 27, and a nozzle 29 is opened at a tip 27 a of the pressing member 27. The air blown out from each nozzle 29 is blown against both right and left edges of the lid 8, and the lid 8 is pressed against the flange 6 a of the container 6 by the pressure of the air.
[0025]
Inside the outer heating member 25, an inner heating member (corresponding to a heating member in the present invention) 32 for heating the inner region 31 of the annular region 30 with respect to the lid member 8 is provided. Since the heating of the inner region 31 of the lid member 8 is a heating treatment of the lid member 8 like the heating in the first seal, it can be combined with the first seal. In this example, the inner heating member 32 has a structure as a heating plate that heats the inner region 31 over the entire surface, is configured separately from the outer heating member 25, and also sets the temperature of the inner heating member 32. It is preferable that the heating can be performed at an optimum temperature according to the material of the lid member 8 so that it can be set separately from the outer heating member 25.
[0026]
FIG. 4 shows a state in which the outer heating member 25 and the inner heating member 32 are separately operated. That is, the outer heating member 25 is formed integrally with the cylinder 33, and the inner heating member 32 is formed as a piston displaced in the cylinder 33, whereby the inner heating member 32 approaches and separates from the lid member 8 at an arbitrary timing. Thus, the lid member 8 can be appropriately heated. With this configuration, the inner heating member 32 is operated independently of the outer heating member 25 that heat seals the lid member 8. As a result, it is possible to operate the inner heating member 32 under operating conditions different from those of the outer heating member 25, not only under operating conditions such as temperature but also timing, and to heat the lid member 8 under optimum conditions according to the material. can do.
[0027]
Regarding the heating timing as one of the operating conditions, the timing of heating the inner region 31 of the lid member 8 may be shifted with respect to the heat sealing of the lid member 8. In particular, if the heating of the inner region 31 of the lid member 8 is performed after the heat sealing of the lid member 8, the inner region 31 of the lid member 8 fixed by the heat sealing is heated after the sealing, and then cooled. Therefore, it is possible to more effectively eliminate the wrinkles and wrinkles generated in the lid member 8.
[0028]
According to this manufacturing method, when the lid material 8 is heat-sealed to the container 6 after the contents 7 have been put into the container 6, the lid material 8 has an inner region 31 of the annular region 30 as a sealing region. Heated by the heating member 32. Since tension is generated in the heated lid member 8 due to shrinkage during cooling, it is possible to eliminate the occurrence of wrinkles and wrinkles that may impair the appearance of the heat-sealed lid member 8.
[0029]
Instead of performing the heating of the inner region 31 of the lid member 8 by the first seal portion 21, a second seal that is disposed downstream of the first seal portion 21 in the transport direction and forms a second seal on the lid member 8 is formed. 2 can be performed in the seal portion 22. By heating the inner region 31 of the lid member 8 in the second seal portion 22, the inner region 31 of the lid member 8, the periphery of which is fixed by the first seal, contracts at the time of cooling, thereby eliminating the bulge and wrinkles. It can be performed efficiently and effectively. In this case, the heating member for heating the inner region 31 can be configured in the same manner as the structure of the inner heating member 32 in the case where the heating is performed by the first seal portion 21.
[0030]
In the above embodiment, various changes and additions are possible. For example, the containers 6 are supplied in a single row, but it is of course possible to configure them so that they can be processed in a plurality of rows. In the above example, the gas replacement packaging has been described. However, the present invention can be applied to a packaging in which gas replacement is not performed. In addition, the heating of the inner region 31 may be performed not on the entire surface, but may be performed only on the annular region immediately inside the annular seal portion, which is liable to cause bulges and wrinkles. Further, the inner heating member 32 may be formed integrally with the outer heating member 25. In this case, in order to change the distance between the inner heating member 32 and the outer heating member 25 with respect to the lid member 8, a step is formed on the surface side with respect to the lid member 8. May be formed. Furthermore, by interposing a heat insulating material between the outer heating member 25 and the inner heating member 32, the heating of the lid member 8 by the outer heating member 25 and the inner heating member 32 can be individually performed at an optimum temperature and an optimum time. You can do it too.
[0031]
【The invention's effect】
The method for producing a container with contents according to the present invention is configured as described above, and heat-sealing the container by heat-sealing the lid material around the opening of the container into which the contents have been charged. In order to eliminate the wrinkles and wrinkles generated on the covered material, the inside region of the fixed sealing region of the cover material is heated by the inside heating member. Tension acts on the heated lid member due to shrinkage during cooling, and the appearance of the lid can be improved by eliminating bulges and wrinkles. Also, while pressure can be expected to decrease due to condensation, the use of steam, which creates a high-temperature and high-humidity environment, is not used. When sealing the part, it is possible to prevent the occurrence of wrinkles and wrinkles. Further, simultaneously with the heat sealing of the lid member, the heating position can be precisely controlled by performing the heat treatment using the same transport member to eliminate the wrinkles and wrinkles with high positional accuracy. Further, by adjusting the heating temperature and timing of the lid material by the inner heating member independently of the heat sealing of the lid material, it is possible to set the optimal heating of the lid material.
[Brief description of the drawings]
FIG. 1 is a schematic side view of an apparatus for carrying out a method for producing a container with contents according to the present invention.
FIG. 2 is an enlarged side view showing a main part of the device shown in FIG.
FIG. 3 is a sectional view of the packaging device shown in FIG.
FIG. 4 is a sectional view showing another operation state of the heating plate of the packaging device shown in FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gas replacement packaging apparatus 2 Container and contents transfer station 3 Chamber station 4 Sealing station 5 Package removal station 6 Container 6a Opening 7 Contents 8 Cover material 9 Package 20 Sealing mechanism 21 First seal part 22 Second seal Part 30 sealing area 31 inner area 32 heating member

Claims (6)

内容物が投入された容器の開口部の周囲に蓋材をヒートシールすることによって前記容器を封鎖するに際して、前記蓋材のシール領域で囲まれる内側領域を加熱部材にて加熱することから成る内容物入り容器の製造方法。When closing the container by heat-sealing the lid around the opening of the container into which the content has been charged, heating the inner region surrounded by the sealing region of the lid with a heating member. Method for manufacturing container with material. 前記内容物の投入と前記蓋材のヒートシールとは前記容器が搬送される搬送経路の途上で行われ、前記加熱部材による前記蓋材の前記内側領域の加熱は、搬送方向の上流側に配置され且つ前記シール領域として前記蓋材の部分の第1シール部において行われることから成る請求項1に記載の内容物入り容器の製造方法。The charging of the contents and the heat sealing of the lid material are performed in the middle of the transport path in which the container is transported, and the heating of the inner region of the lid material by the heating member is arranged on the upstream side in the transport direction. The method for manufacturing a container with contents according to claim 1, wherein the sealing is performed in a first sealing portion of the lid member as the sealing region. 前記内容物の投入と前記蓋材のヒートシールとは前記容器が搬送される搬送経路の途上で行われ、前記加熱部材による前記蓋材の前記内側領域の加熱は、搬送方向の下流側に配置され且つ前記蓋材に前記シール領域を形成する第2シール部において行われることから成る請求項1に記載の内容物入り容器の製造方法。The charging of the contents and the heat-sealing of the lid material are performed in the middle of a transport path in which the container is transported, and the heating of the inner region of the lid material by the heating member is arranged downstream in the transport direction. The method for producing a container with contents according to claim 1, wherein the method is performed in a second sealing portion that is formed and forms the sealing region in the lid member. 前記蓋材の前記内側領域の加熱は、前記蓋材のヒートシールとタイミングをずらせて行われることから成る請求項1に記載の内容物入り容器の製造方法。The method for producing a container with contents according to claim 1, wherein the heating of the inner region of the lid member is performed at a timing shifted from the heat sealing of the lid member. 前記蓋材の前記内側領域の加熱は、前記蓋材のヒートシールの温度とは異なる温度で行われることから成る請求項1に記載の内容物入り容器の製造方法。The method for manufacturing a container with contents according to claim 1, wherein the heating of the inner region of the lid member is performed at a temperature different from the temperature of heat sealing of the lid member. 前記加熱部材を、前記蓋材をヒートシールするヒートシーラとは独立して作動させることから成る請求項1に記載の内容物入り容器の製造方法。The method for producing a container with contents according to claim 1, wherein the heating member is operated independently of a heat sealer for heat-sealing the lid member.
JP2003085703A 2003-03-26 2003-03-26 Manufacturing method for container with content Withdrawn JP2004292000A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013163280A (en) * 2012-02-09 2013-08-22 Kyoraku Co Ltd Method of manufacturing food in container and food in container
WO2022085558A1 (en) * 2020-10-20 2022-04-28 株式会社日清製粉ウェルナ Manufacturing method for frozen food packaging container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013163280A (en) * 2012-02-09 2013-08-22 Kyoraku Co Ltd Method of manufacturing food in container and food in container
WO2022085558A1 (en) * 2020-10-20 2022-04-28 株式会社日清製粉ウェルナ Manufacturing method for frozen food packaging container

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