JP5297839B2 - Cylindrical film molding manufacturing apparatus, cylindrical packing automatic filling and packaging machine, and hot air application nozzle - Google Patents

Cylindrical film molding manufacturing apparatus, cylindrical packing automatic filling and packaging machine, and hot air application nozzle Download PDF

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JP5297839B2
JP5297839B2 JP2009046492A JP2009046492A JP5297839B2 JP 5297839 B2 JP5297839 B2 JP 5297839B2 JP 2009046492 A JP2009046492 A JP 2009046492A JP 2009046492 A JP2009046492 A JP 2009046492A JP 5297839 B2 JP5297839 B2 JP 5297839B2
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清已 中井
仁 小林
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Asahi Kasei Chemicals Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus or the like capable of easily manufacturing a cylindrical film-formed body and a cylindrical packaged body having excellent seal strength and the excellent appearance of an overlapped part and its periphery. <P>SOLUTION: The apparatus for manufacturing the cylindrical film-formed body includes a cylinder manufacturing means for forming a cylindrical body in which a strip-like synthetic resin-made film is curved in a cylindrical shape, and both side edges of the synthetic resin-made film overlap each other, and a hot air sealing means for forming the cylindrical film-formed body by blowing hot air to an overlapped portion of the cylindrical body and executing the heat-bonding of the overlapped portion. A hot air applying nozzle comprising a projecting nozzle body, a slit formed in a projecting end face of the nozzle body, and a nozzle opening formed at the slit is used for the apparatus. In the nozzle body, a wall thickness &Delta;t at the projecting end face is &le;1 mm, and the cutout angle &theta; of a side of the projecting end face is &ge;30&deg;. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、筒状フィルム成形体の製造装置、及び筒状包装体の自動充填包装機、並びに熱風印加ノズルに関する。   The present invention relates to an apparatus for manufacturing a cylindrical film molded body, an automatic filling and packaging machine for a cylindrical packaging body, and a hot air application nozzle.

従来、蒟蒻、漬物、ハム・ソーセージといった液状食品或いは練り状食品等の流動性を有する物品(被包装物)の包装方法として、長尺の合成樹脂フィルムの両側縁同士を重ね合わせて融着した筒状フィルム成形体内に、上記物品或いはその原料を充填し、該筒状フィルム成形体の両端部を封止する方法が広く用いられている。   Conventionally, as a method of packaging liquid goods such as rice cakes, pickles, hams and sausages or paste-like foods (packaged items), both side edges of a long synthetic resin film are overlapped and fused. A method of filling the above-mentioned article or its raw material into a cylindrical film molded body and sealing both ends of the cylindrical film molded body is widely used.

この種の筒状包装体の包装作業は、通常、筒状フィルム成形体の成形から封止まで連続工程で行われている。具体的には、帯状の合成樹脂フィルムを繰り出しながら両側縁同士を重ね合わせて融着させることにより筒状フィルム成形体を成形し、この筒状フィルム成形体中に被包装物を充填した後、所定の間隔で該筒状フィルム成形体を外部から押圧して内部の被包装物を押しのけ、その押しのけた部分を金属ワイヤーや熱シールによって封止し、筒状包装体毎にフィルムを切断する。   The packaging operation of this type of cylindrical package is usually performed in a continuous process from molding to sealing of the cylindrical film molded body. Specifically, a cylindrical film molded body is formed by overlapping and fusing both side edges while feeding out a belt-shaped synthetic resin film, and after filling a packaged article in this cylindrical film molded body, The tubular film molded body is pressed from the outside at a predetermined interval to displace the object to be packaged, and the pushed portion is sealed with a metal wire or heat seal, and the film is cut for each tubular package.

上記の筒状フィルム成形体を成形するために用いられるシール(融着)方法としては、高周波シールや熱板シール等が広く利用されているが、近年、環境面への配慮及び生産性の向上の観点から、非接触でシール可能な、熱風シール方式を採用する種々の試みが為されている。   High-frequency seals and hot plate seals are widely used as the sealing (fusion) method used to form the above-mentioned cylindrical film molded body, but in recent years environmental considerations and productivity improvements have been improved. In view of the above, various attempts have been made to adopt a hot air sealing method that can seal without contact.

例えば、特許文献1には、熱可塑性樹脂帯状フィルムをフォルダで筒状となし、その両側縁の重ね合わされた部分にノズルから熱風を吹き付けて筒状フィルム成形体を成形する、自動充填包装機が開示されている。   For example, Patent Document 1 discloses an automatic filling and packaging machine in which a thermoplastic resin belt-shaped film is formed into a cylindrical shape by a folder, and a cylindrical film molded body is formed by blowing hot air from a nozzle to the overlapped portions of both side edges. It is disclosed.

また、この種の自動充填包装機械としては、KAP500型(呉羽化学(株)製)やADP(登録商標)F型(旭化成ケミカルズ(株)製)等が上市されており、例えば、特許文献2及び3では、そのような自動充填包装機械が用いられている。   Further, as this type of automatic filling and packaging machine, KAP500 type (manufactured by Kureha Chemical Co., Ltd.), ADP (registered trademark) F type (manufactured by Asahi Kasei Chemicals Co., Ltd.), etc. are marketed. And 3, such an automatic filling and packaging machine is used.

実公昭55−14171号公報Japanese Utility Model Publication No. 55-14171 特開2001−9993公報JP 2001-9993 A 特開2000−37828公報JP 2000-37828 A

しかしながら、上記従来の熱風シール方式の自動充填包装機においては、筒状体の重ね合わせ部(シール部)周辺の広い範囲にわたって熱風が印加されるので、重ね合わせ部周辺のフィルムに熱変形や熱収縮を生じさせ易かった。かかるフィルムの熱変形や熱収縮は、フィルム搬送時の脈動やシール部のばたつき等と相まって、シール幅の過度のばらつき、シール部の過度の荒れ(皺)、シール部周辺のピンホール等の外観不良を引き起こす。この外観不良の問題は、高収縮性の合成樹脂フィルムを適用する場合において、特に顕在化する。   However, in the conventional hot air sealing type automatic filling and packaging machine, since hot air is applied over a wide range around the overlapping portion (sealing portion) of the cylindrical body, the film around the overlapping portion is subjected to thermal deformation and heat. It was easy to cause contraction. Such thermal deformation and shrinkage of the film, coupled with pulsation during film transportation and flapping of the seal, etc., causes excessive variations in the seal width, excessive roughness of the seal (部), pinholes around the seal, etc. Cause defects. This problem of poor appearance becomes particularly apparent when a highly shrinkable synthetic resin film is applied.

また、フィルムの熱変形や熱収縮は、熱風シール時の不均一な熱融着プロセスの進行を招き、非熱融着部分がシール部に多量に残存した状態での熱風シールが実行され得るで、シール強度の低下及びシール易剥離の問題をも生じさせる。このような機械強度の低下は、例えば、得られる筒状包装体をレトルト殺菌等の高温或いは高圧プロセスを施した場合に、レトルト殺菌時のパンクや雑菌の混入等の問題をも引き起こし得るので、歩留まりを低下させる要因となる。   In addition, the thermal deformation or shrinkage of the film causes a non-uniform heat fusion process at the time of hot air sealing, and hot air sealing can be performed in a state where a large amount of non-thermal fusion portions remain in the seal portion. Moreover, the problem of the fall of seal strength and the easy peeling of a seal | sticker is also produced. Such a decrease in mechanical strength can cause problems such as puncture and miscellaneous contamination during retort sterilization, for example, when the obtained cylindrical package is subjected to a high temperature or high pressure process such as retort sterilization. It becomes a factor to reduce the yield.

そのため、上記従来の自動充填包装機は、各種の素材選定や製造条件の幅(プロセス裕度)が乏しく、汎用性、生産性及び経済性に劣るものであり、早急な改善が求められていた。   Therefore, the conventional automatic filling and packaging machine described above has a wide range of material selection and manufacturing conditions (process margin), is inferior in versatility, productivity and economy, and has been required to be improved immediately. .

本発明は、かかる事情を鑑みてなされたものであり、その目的は、シール強度に優れるとともに重ね合わせ部(シール部)及びシール部周辺の外観良好な筒状フィルム成形体及び筒状包装体を製造可能であり、且つ、汎用性、生産性及び経済性に優れる、筒状フィルム成形体の製造装置及び筒状包装体の自動充填包装機、並びにこれらに使用可能な熱風印加ノズルを提供することにある。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a tubular film molded body and a tubular package that are excellent in sealing strength and have a good appearance around the overlapping portion (sealing portion) and the sealing portion. To provide a manufacturing apparatus for a cylindrical film molded body, an automatic filling and packaging machine for a cylindrical packaging body, and a hot air application nozzle usable for these, which are manufacturable and excellent in versatility, productivity and economy. It is in.

本発明者らは、上記課題に対し鋭意検討した結果、噴射する熱風の流れが制御された熱風印加ノズルを採用することにより、上記従来の種々の課題が解消されることを見出し、本発明を完成するに至った。   As a result of intensive studies on the above problems, the present inventors have found that the above-described various problems can be solved by adopting a hot air application nozzle in which the flow of hot air to be jetted is controlled. It came to be completed.

すなわち、本発明は、以下<1>〜<8>を提供する。
<1> 帯状の合成樹脂フィルムを筒状に湾曲させて該合成樹脂フィルムのフィルム両側縁が重ね合わせられた筒状体を形成する製筒手段と、前記筒状体の重ね合わせ部に熱風を吹き付け該重ね合わせ部を熱融着させて筒状フィルム成形体を成形する熱風シール手段と、を有する筒状フィルム成形体の製造装置であって、
前記熱風シール手段は、熱風印加ノズルを備え、
前記熱風印加ノズルは、凸状に形成されたノズル本体と、該ノズル本体の凸端面に形成されたスリットと、該スリット内に形成されたノズル開口とを有し、
前記ノズル本体は、前記凸端面における肉厚△tが各々1mm以下、且つ、前記凸端面の側部の切り欠き角度θが30度以上、である凸状構造を有する、
筒状フィルム成形体の製造装置。
That is, the present invention provides the following <1> to <8>.
<1> Cylinder making means for forming a cylindrical body in which a belt-shaped synthetic resin film is curved into a cylindrical shape and the both side edges of the synthetic resin film are overlapped; and hot air is applied to the overlapping portion of the cylindrical body And a hot-air sealing means for forming a tubular film molded body by spraying and heat-sealing the overlapped portion, and a tubular film molded body manufacturing apparatus comprising:
The hot air sealing means includes a hot air application nozzle,
The hot air application nozzle has a nozzle body formed in a convex shape, a slit formed in a convex end surface of the nozzle body, and a nozzle opening formed in the slit,
The nozzle body has a convex structure in which the thickness Δt at the convex end surface is 1 mm or less and the notch angle θ of the side portion of the convex end surface is 30 degrees or more.
Manufacturing apparatus for cylindrical film moldings.

このように構成すると、ノズル開口から噴射される熱風は、スリットを構成するノズル本体によって集束され、換言すれば、シール部周辺への熱風の吹き付けがノズル本体によって遮蔽(規制)されるため、筒状体の重ね合わせ部(シール部)に局所的に吹き付けられる。また、熱風シール時においては、熱風の印加にともないノズル本体の温度が数百℃程度に上昇し得るが、シール部に近接する凸端面における肉厚△tが各々1mm以下に設定され、従来に比して、シール部に近接する凸端面の面積が小さく設定されているので、このノズル本体の昇温によるシール部及びシール部周辺への影響が抑制される。しかも、ノズル本体は、シール部に近接する凸状構造、すなわち凸端面の側部の切り欠き角度θが30度以上に設定され、謂わば、凸端面がシール部に向かって突出した凸状構造に形成され、ノズル本体とシール部周辺との間の空間が十分に確保された構成となっている。そのため、熱風シール時の随伴流の発生が促進され、シール部周辺の温度上昇が抑制されるとともに、シール部に吹き付けられた熱風がノズル本体とシール部周辺との間の空間から外方へと効率的に排出される。これらの作用が相まった結果、シール部へ所望の熱印加が行われるとともに、シール部周辺への過度の熱印加が緩和され、これにより、シール強度に優れるとともにシール部及びシール部周辺の外観良好な筒状フィルム成形体が得られる。したがって、本構成の製造装置は、高収縮性の合成樹脂フィルムを簡便に適用可能であり、汎用性が向上され、生産性及び経済性が高められたものとなる。但し、作用は上記内容に限定されない。   With this configuration, the hot air sprayed from the nozzle opening is focused by the nozzle body that forms the slit, in other words, the blowing of hot air around the seal portion is shielded (regulated) by the nozzle body. It is sprayed locally on the overlapping part (seal part) of the body. Further, at the time of hot air sealing, the temperature of the nozzle body can rise to about several hundred degrees Celsius with the application of hot air, but the wall thickness Δt on the convex end surface close to the seal portion is set to 1 mm or less, respectively. In comparison, since the area of the convex end surface adjacent to the seal portion is set to be small, the influence of the temperature increase of the nozzle body on the seal portion and the periphery of the seal portion is suppressed. Moreover, the nozzle body has a convex structure close to the seal portion, that is, a convex structure in which the notch angle θ of the side portion of the convex end surface is set to 30 ° or more, so-called convex structure in which the convex end surface protrudes toward the seal portion. The space between the nozzle body and the periphery of the seal portion is sufficiently secured. Therefore, the generation of an accompanying flow at the time of hot air sealing is promoted, the temperature rise around the seal portion is suppressed, and the hot air blown to the seal portion moves outward from the space between the nozzle body and the seal portion periphery. Efficiently discharged. As a result of the combined action, desired heat is applied to the seal portion, and excessive heat application to the periphery of the seal portion is alleviated, thereby improving the seal strength and improving the appearance of the seal portion and the periphery of the seal portion. Can be obtained. Therefore, the manufacturing apparatus of this structure can apply a highly shrinkable synthetic resin film simply, and versatility is improved and productivity and economy are improved. However, the action is not limited to the above contents.

<2> 前記ノズル本体は、前記凸端面に向かって肉薄となるように切り欠かれた絞込構造を有する、
上記<1>に記載の筒状フィルム成形体の製造装置。
<2> The nozzle body has a narrowing structure that is cut out so as to become thinner toward the convex end surface.
The manufacturing apparatus of the cylindrical film molding as described in <1> above.

このように構成すると、熱風シール時の随伴流の発生が促進される。また、ノズル本体とシール部周辺との間の空間がより一層広げられるので、シール部に吹き付けられた熱風が外方へ効率的に排出され易くなる。したがって、シール部周辺における外観不良の発生が抑制される。   If comprised in this way, generation | occurrence | production of the accompanying flow at the time of hot air sealing will be accelerated | stimulated. Moreover, since the space between the nozzle body and the periphery of the seal portion is further expanded, the hot air blown to the seal portion is easily discharged efficiently. Therefore, the appearance defect around the seal portion is suppressed.

<3> さらに、前記重ね合わせ部の裏面側から熱を印加する加熱手段を有する、
上記<1>又は<2>に記載の筒状フィルム成形体の製造装置。
<3> Furthermore, it has a heating means for applying heat from the back side of the overlapping portion.
The manufacturing apparatus of the cylindrical film molded object as described in said <1> or <2>.

このように構成すると、従来に比して、熱風シール時における重ね合わせ部(シール部)の表面側及び裏面側の温度差が低減されるので、重ね合わせ部の厚み方向に対する温度勾配が緩和されて、重ね合わせ部が短時間で十分に加温される。本発明者らの知見によれば、従来においては、かかる温度差(温度勾配)に起因して不均一な熱融着プロセスが進行し、非熱融着部分がシール部に多量に残存した状態で熱風シールが実行されていたものと推定される。よって、本構成によれば、重ね合わせ部が十分に加温されて非熱融着部分の存在割合が減少されるので、均一な熱融着が促進される。また、従来においては、かかる熱風シール時の温度差(温度勾配)を考慮して熱風の温度を合成樹脂フィルムの融点よりも十分に高い温度に設定する必要があったが、本構成においては、内部ヒータの熱アシストにより、熱風印加ノズルから吹き付ける熱風の温度を低く設定することが可能となる。その結果、プロセス裕度が格別に高められ、処理速度の向上が図られるとともに、フィルムの熱変形や熱収縮を抑制することも可能となり、シール部及びシール部周辺の外観不良の発生が抑制される。特に、筒状フィルム成形体内に冷蔵食品や冷凍食品等の低温の物品を充填する場合、シール部の裏面側が冷却されることにより表面側と裏面側との温度差が大きくなり易いので、本構成は殊に有用である。   With this configuration, since the temperature difference between the front surface side and the back surface side of the overlap portion (seal portion) at the time of hot air sealing is reduced, the temperature gradient with respect to the thickness direction of the overlap portion is reduced. Thus, the overlapping portion is sufficiently heated in a short time. According to the knowledge of the present inventors, conventionally, a non-uniform heat-fusion process proceeds due to such a temperature difference (temperature gradient), and a large amount of non-heat-bonded portions remain in the seal portion. It is presumed that hot air sealing was performed. Therefore, according to this configuration, the overlapping portion is sufficiently heated and the proportion of the non-thermally fused portion is reduced, so that uniform thermal fusion is promoted. Further, in the past, it was necessary to set the temperature of the hot air to a temperature sufficiently higher than the melting point of the synthetic resin film in consideration of the temperature difference (temperature gradient) at the time of such hot air sealing. With the heat assist of the internal heater, the temperature of the hot air blown from the hot air application nozzle can be set low. As a result, the process margin is significantly increased, the processing speed is improved, and thermal deformation and thermal shrinkage of the film can be suppressed, and occurrence of poor appearance around the seal portion and the seal portion is suppressed. The In particular, when filling low-temperature articles such as refrigerated foods and frozen foods into a tubular film molded body, the temperature difference between the front side and the back side tends to increase due to cooling of the back side of the seal portion. Is particularly useful.

<4> 帯状の合成樹脂フィルムを供給するフィルム供給手段と、
前記合成樹脂フィルムを筒状に湾曲させて該合成樹脂フィルムのフィルム両側縁が重ね合わせられた筒状体を形成する製筒手段と、
前記筒状体の重ね合わせ部に熱風を吹き付け該重ね合わせ部を熱融着させて筒状フィルム成形体を成形する熱風シール手段と、
前記筒状フィルム成形体中に被包装物を充填する充填手段と、
前記被包装物が充填された前記筒状フィルム成形体を所定の間隔で外部から押圧し、該前記押圧された領域のフィルムを封止切断して、両端部が封止された筒状包装体を複数作製する封止手段と、
を有する自動充填包装機であって、
前記熱風シール手段は、熱風印加ノズルを備え、
前記熱風印加ノズルは、凸状に形成されたノズル本体と、該ノズル本体の凸端面に形成されたスリットと、該スリット内に形成されたノズル開口とを有し、
前記ノズル本体は、前記凸端面における肉厚△tが各々1mm以下、且つ、前記凸端面の側部の切り欠き角度θが30度以上、である凸状構造を有する、
自動充填包装機。
<5> 前記ノズル本体は、前記凸端面に向かって肉薄となるように切り欠かれた絞込構造を有する、
上記<4>に記載の自動充填包装機。
<6> さらに、前記重ね合わせ部の裏面側から熱を印加する加熱手段を有する、
上記<4>又は<5>に記載の自動充填包装機。
<4> film supply means for supplying a strip-shaped synthetic resin film;
A cylinder-making means for forming a cylindrical body in which the synthetic resin film is curved into a cylindrical shape and the both side edges of the synthetic resin film are superimposed;
Hot air sealing means that blows hot air onto the overlapping portion of the cylindrical body and heat-bonds the overlapping portion to form a cylindrical film molded body; and
Filling means for filling a packaged article in the tubular film molded body;
The cylindrical package body in which both ends are sealed by pressing the cylindrical film molded body filled with the packaged object from outside at predetermined intervals, sealing and cutting the film in the pressed area. Sealing means for producing a plurality of
An automatic filling and packaging machine having
The hot air sealing means includes a hot air application nozzle,
The hot air application nozzle has a nozzle body formed in a convex shape, a slit formed in a convex end surface of the nozzle body, and a nozzle opening formed in the slit,
The nozzle body has a convex structure in which the thickness Δt at the convex end surface is 1 mm or less and the notch angle θ of the side portion of the convex end surface is 30 degrees or more.
Automatic filling and packaging machine.
<5> The nozzle body has a narrowing structure that is cut out so as to become thinner toward the convex end surface.
The automatic filling and packaging machine according to <4> above.
<6> Furthermore, it has a heating means for applying heat from the back side of the overlapping portion.
The automatic filling and packaging machine according to <4> or <5> above.

これらの自動充填包装機は、上記<1>から<3>のいずか1項に記載の筒状フィルム成形体の製造装置を有効に適用可能なものであり、上記と同様に、シール強度に優れるとともにシール部及びシール部周辺の外観良好な筒状フィルム成形体及び筒状包装体を簡便に製造可能であり、汎用性、生産性及び経済性に優れる。   These automatic filling and packaging machines can effectively apply the tubular film molded body manufacturing apparatus according to any one of <1> to <3> above, and in the same manner as described above, In addition, it is possible to easily produce a cylindrical film molded body and a cylindrical package body having a good appearance around the seal portion and the seal portion, and are excellent in versatility, productivity and economy.

<7> 凸状に形成されたノズル本体と、該ノズル本体の凸端面に形成されたスリットと、該スリット内に形成されたノズル開口とを有し、
前記ノズル本体は、前記凸端面における肉厚△tが各々1mm以下、且つ、前記凸端面の側部の切り欠き角度θが30度以上、である凸状構造を有する、
熱風印加ノズル。
<8> 前記ノズル本体は、前記凸端面に向かって肉薄となるように切り欠かれた絞込構造を有する、
上記<7>に記載の熱風印加ノズル。
<7> A nozzle body formed in a convex shape, a slit formed in a convex end surface of the nozzle body, and a nozzle opening formed in the slit,
The nozzle body has a convex structure in which the thickness Δt at the convex end surface is 1 mm or less and the notch angle θ of the side portion of the convex end surface is 30 degrees or more.
Hot air application nozzle.
<8> The nozzle body has a narrowed structure that is cut out so as to become thinner toward the convex end surface.
The hot air applying nozzle according to <7> above.

これらの熱風印加ノズルは、上記<1>から<3>のいずか1項に記載の筒状フィルム成形体の製造装置又は上記<4>から<6>のいずか1項に記載の自動充填包装機に有効に適用可能なものであり、シール部への所望の熱印加とシール部周辺への過度の熱印加の緩和とを、両立し得るものである。   These hot air application nozzles are the manufacturing apparatus of the tubular film molded body according to any one of <1> to <3> above or any one of the above <4> to <6>. The present invention can be effectively applied to an automatic filling and packaging machine, and can achieve both desired heat application to the seal portion and relaxation of excessive heat application to the periphery of the seal portion.

本発明によれば、シール強度に優れるとともにシール部及びシール部周辺の外観良好な筒状フィルム成形体及び筒状包装体を簡便に製造可能であり、歩留まりの向上、汎用性、生産性及び経済性の向上が図られる。   According to the present invention, it is possible to easily manufacture a cylindrical film molded body and a cylindrical package body having excellent sealing strength and good appearance around the sealing portion and the sealing portion, and improving yield, versatility, productivity and economy. The improvement of the property is achieved.

第1実施形態の自動充填包装機を模式的に示す断面図である。It is sectional drawing which shows the automatic filling packaging machine of 1st Embodiment typically. 第1実施形態の自動充填包装機の要部を模式的に示す斜視図である。It is a perspective view which shows typically the principal part of the automatic filling packaging machine of 1st Embodiment. 第1実施形態の熱風印加ノズルを示す斜視図である。It is a perspective view which shows the hot air application nozzle of 1st Embodiment. 図3の横断面図である。It is a cross-sectional view of FIG. 第1実施形態における熱風シールの原理を示す断面図である。It is sectional drawing which shows the principle of the hot air seal in 1st Embodiment. 他の実施形態の熱風印加ノズルを示す断面図である。It is sectional drawing which shows the hot air application nozzle of other embodiment. 他の実施形態の熱風印加ノズルを示す断面図である。It is sectional drawing which shows the hot air application nozzle of other embodiment.

以下、本発明の実施の形態について、図面を参照して説明する。なお、図面中、同一の要素には同一の符号を付し、重複する説明を省略する。また、上下左右等の位置関係は、特に断らない限り、図面に示す位置関係に基づくものとし、さらに、図面の寸法比率は、図示の比率に限定されるものではない。また、以下の実施の形態は、本発明を説明するための例示であり、本発明はその実施の形態のみに限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified, and the dimensional ratio in the drawing is not limited to the illustrated ratio. The following embodiments are examples for explaining the present invention, and the present invention is not limited only to the embodiments.

(第1実施形態)
図1及び図2は、本実施形態による自動充填包装機100の要部構造を模式的に示す縦断面図及び斜視図である。
自動充填包装機100は、フィルム供給手段11、充填手段21、製筒手段31、熱風シール手段41、封止手段51を備える。本実施形態においては、フィルム供給手段11、製筒手段31及び熱風シール手段41により、帯状の合成樹脂フィルム1から筒状体2が形成され、その重ね合わせ部を熱融着させることで筒状フィルム成形体3が成形される。
(First embodiment)
FIG.1 and FIG.2 is the longitudinal cross-sectional view and perspective view which show typically the principal part structure of the automatic filling packaging machine 100 by this embodiment.
The automatic filling and packaging machine 100 includes a film supply unit 11, a filling unit 21, a tube making unit 31, a hot air sealing unit 41, and a sealing unit 51. In this embodiment, the tubular body 2 is formed from the strip-shaped synthetic resin film 1 by the film supply means 11, the tube making means 31, and the hot air sealing means 41, and the overlapped portion is heat-sealed to form a tubular shape. The film molded body 3 is molded.

フィルム供給手段11は、複数のローラ対11a,11b、送りローラ12a,12b及び駆動機構(図示せず)を有し、図示しない駆動機構及び送りローラ12a,12bの駆動に応じて、原反ロールから帯状の合成樹脂フィルム1を連続的に供給する。合成樹脂フィルム1の供給速度は、通常、10〜60m/min程度であり、使用する合成樹脂フィルム1の種類、厚さ、剛性、融点や、充填される被包装物の素材や粘度等に応じて適宜設定される。   The film supply means 11 has a plurality of pairs of rollers 11a and 11b, feed rollers 12a and 12b, and a drive mechanism (not shown), and an original roll according to the drive of the drive mechanism and the feed rollers 12a and 12b (not shown). The strip-shaped synthetic resin film 1 is continuously supplied from the above. The supply speed of the synthetic resin film 1 is usually about 10 to 60 m / min, depending on the type, thickness, rigidity, melting point of the synthetic resin film 1 to be used, and the material and viscosity of the packaged material to be filled. Is set as appropriate.

充填手段21は、中空円筒状の充填ノズル22を有し、その上端に、被包装物を充填ノズル22内に供給するフィードポンプ23が接続されている。充填手段21は、フィードポンプ23の駆動に応じて、被包装物を充填ノズル22内へ供給する。ここで適用される被包装物は、例えば、魚肉、畜肉、液卵、ゼリー、蒟蒻、漬物といった液状或いは練り状の食品や物品が挙げられるが、これらに特に限定されるものではない。   The filling means 21 has a hollow cylindrical filling nozzle 22, and a feed pump 23 that supplies an article to be packed into the filling nozzle 22 is connected to the upper end of the filling nozzle 21. The filling means 21 supplies the article to be packaged into the filling nozzle 22 according to the drive of the feed pump 23. Examples of the package to be packaged include, but are not particularly limited to, liquid or kneaded foods and articles such as fish meat, livestock meat, liquid eggs, jelly, salmon, and pickles.

製筒手段31は、所定形状の金属片を略螺線状に巻いて形成された製筒フォルダ32を有する。製筒フォルダ32は、その内周径が充填ノズル22の外周径よりも大きく形成され、充填ノズル22と略同心円上に配置されている。そのため、充填ノズル22の外周壁と製筒フォルダ32の内周壁とは、所定距離、離間して配置された状態となっている。そして、原反ロールから供給される帯状の合成樹脂フィルム1は、製筒フォルダ32の上面開口から下面開口へと導かれ、製筒フォルダ32内を通過する際に、その螺線構造に追従して筒状に湾曲され、その両端縁1a,1bが重ね合わされた筒状体2となって、製筒フォルダ32の下面開口から図示下方へと移送される。   The tube making means 31 has a tube making folder 32 formed by winding a metal piece of a predetermined shape into a substantially spiral shape. The tube making folder 32 is formed so that the inner peripheral diameter thereof is larger than the outer peripheral diameter of the filling nozzle 22 and is arranged substantially concentrically with the filling nozzle 22. Therefore, the outer peripheral wall of the filling nozzle 22 and the inner peripheral wall of the tube making folder 32 are in a state of being spaced apart by a predetermined distance. The strip-shaped synthetic resin film 1 supplied from the raw roll is guided from the upper surface opening to the lower surface opening of the tube making folder 32 and follows the spiral structure when passing through the tube making folder 32. The cylindrical body 2 is bent into a cylindrical shape and its both end edges 1a and 1b are overlapped, and is transferred downward from the opening of the cylindrical folder 32 in the figure.

熱風シール手段41は、熱風印加ノズル42及び内部ヒータ47を有する。熱風印加ノズル42及び内部ヒータ47は、製筒フォルダ32の下方において、筒状体2の重ね合わせ部2a(合成樹脂フィルム1の両端縁1a,1bが重ね合わされた部分)を介して対向配置され、図示しない冶具により固定されている。より具体的には、熱風印加ノズル42は、筒状体2の重ね合わせ部2aの表面から所定距離、離間した位置に配置され、内部ヒータ47は、筒状体2の重ね合わせ部2aの裏面と接する位置に配置されている。なお、熱風印加ノズル42は加圧調整機構及び温度調整機構を有し、内部ヒータ47は温度調整機構を有するが、ここでは図示を省略する。   The hot air sealing means 41 includes a hot air applying nozzle 42 and an internal heater 47. The hot air application nozzle 42 and the internal heater 47 are arranged opposite to each other below the tube-making folder 32 via an overlapping portion 2a of the cylindrical body 2 (a portion where both end edges 1a and 1b of the synthetic resin film 1 are overlapped). These are fixed by a jig (not shown). More specifically, the hot air applying nozzle 42 is disposed at a position separated from the surface of the overlapping portion 2 a of the cylindrical body 2 by a predetermined distance, and the internal heater 47 is the back surface of the overlapping portion 2 a of the cylindrical body 2. It is arranged at the position that touches. The hot air applying nozzle 42 has a pressure adjusting mechanism and a temperature adjusting mechanism, and the internal heater 47 has a temperature adjusting mechanism, but the illustration is omitted here.

図3及び図4は、熱風印加ノズル42を示す斜視図及び横断面図である。
熱風印加ノズル42は、略柱状のステンレスを断面凸状に成形加工したノズル本体43を有し、その凸端面43aにはスリットSが形成され、このスリットS内にノズル開口43bが長手方向に沿って複数形成されている。ノズル開口43bは、ノズル本体43内に形成された内部空間Tを通じて加圧調整機構及び温度調整機構と接続され、所定の温度及び圧力の温風がノズル開口43bから噴射されるように構成されている。
3 and 4 are a perspective view and a cross-sectional view showing the hot air applying nozzle 42.
The hot air applying nozzle 42 has a nozzle body 43 formed by processing a substantially columnar stainless steel into a convex cross section, and a slit S is formed on the convex end surface 43a, and a nozzle opening 43b is formed in the slit S along the longitudinal direction. Are formed. The nozzle opening 43b is connected to the pressure adjustment mechanism and the temperature adjustment mechanism through an internal space T formed in the nozzle body 43, and is configured such that warm air at a predetermined temperature and pressure is ejected from the nozzle opening 43b. Yes.

ノズル本体43は、その横断面において、凸端面43aが筒状体2の重ね合わせ部2aに向かって突出した凸状構造に形成され、これにより、ノズル本体43と筒状体2の重ね合わせ部2a周辺との間の空間Wが広げられた構成となっている(図5参照)。より具体的には、ノズル本体43は、その横断面において、凸端面43aに向かって肉薄となるように、凸端面43aの両側部が略一定の曲率Rで切り欠かれた絞込構造を有する(図4及び図5参照)。   The nozzle body 43 is formed in a convex structure in which the convex end surface 43a protrudes toward the overlapping portion 2a of the cylindrical body 2 in the cross section thereof, whereby the overlapping portion of the nozzle main body 43 and the cylindrical body 2 is formed. The space W between 2a and the periphery is widened (see FIG. 5). More specifically, the nozzle main body 43 has a narrowing structure in which both side portions of the convex end surface 43a are cut out with a substantially constant curvature R so that the nozzle main body 43 becomes thinner toward the convex end surface 43a in the cross section. (See FIGS. 4 and 5).

そして、ノズル本体43は、凸端面43aにおける肉厚△tが各々1mm以下の薄肉に形成されている。このように構成することで、ノズル本体43自身の昇温による筒状体2の重ね合わせ部2a及びその周辺への熱影響が抑制される。凸端面43aにおける肉厚△tは、各々0.7mm以下が好ましく、各々0.5mm以下がより好ましく、各々0.3mm以下がさらに好ましい。   The nozzle body 43 is formed to be thin with a thickness Δt of 1 mm or less at the convex end face 43a. By comprising in this way, the thermal influence to the superimposition part 2a of the cylindrical body 2 by the temperature rising of the nozzle main body 43 itself and its periphery is suppressed. The thickness Δt of the convex end face 43a is preferably 0.7 mm or less, more preferably 0.5 mm or less, and still more preferably 0.3 mm or less.

また、ノズル本体43は、凸端面43aの側部の切り欠き角度θが、30度以上の凸状構造を有する(図4及び図5参照)。このように構成することで、熱風シール時に随伴流の発生が促進され、これにより筒状体2の重ね合わせ部2a周辺の温度上昇が抑制されるとともに、筒状体2の重ね合わせ部2aに吹き付けられた熱風がノズル本体43と筒状体2の重ね合わせ部2a周辺との間の空間Wから外方へと効率的に排出される。かかる角度θは、40度以上が好ましく、より好ましくは50度以上である。なお、本明細書において、凸端面43aの側部の切り欠き角度θとは、凸端面43aを基準線X(水平線)とし、この基準線Xから深度2mmに位置する平行線Yとノズル本体43の最外方との接点Zとした際の、凸端面43aから見た接点Zの俯角を意味する(図4参照)。   Further, the nozzle body 43 has a convex structure in which the notch angle θ of the side portion of the convex end surface 43a is 30 degrees or more (see FIGS. 4 and 5). By configuring in this way, the generation of an accompanying flow is promoted at the time of hot air sealing, thereby suppressing a temperature rise around the overlapping portion 2a of the cylindrical body 2 and also in the overlapping portion 2a of the cylindrical body 2. The hot air blown is efficiently discharged outward from the space W between the nozzle body 43 and the periphery of the overlapping portion 2a of the cylindrical body 2. The angle θ is preferably 40 degrees or more, more preferably 50 degrees or more. In the present specification, the notch angle θ at the side of the convex end surface 43a is defined by taking the convex end surface 43a as a reference line X (horizontal line) and the parallel line Y located at a depth of 2 mm from the reference line X and the nozzle body 43. Means the depression angle of the contact point Z as viewed from the convex end face 43a when the contact point Z is the outermost contact point (see FIG. 4).

スリットSの幅Δwは、所望するシール線幅の熱風シールが実行されるように適宜設定されるが、0.3〜2mm程度が好ましく、0.5〜1.5mm程度がより好ましい。得られるシール部の外形寸法を小さくし美観を向上させる観点から、スリットSの幅Δwは小さいことが好ましい。スリットSの深さ△dは、所望する圧力印加が実行され且つ筒状体2の重ね合わせ部2a周辺への熱風の吹き付けが遮蔽(規制)されるように適宜設定されるが、0.5〜5mm程度が好ましく、1〜3mm程度がより好ましい。スリットSの長さΔlは、特に限定されず、所望するシール長さや所望する処理性能に応じて適宜設定することができる。   The width Δw of the slit S is appropriately set so that hot air sealing with a desired seal line width is performed, but is preferably about 0.3 to 2 mm, and more preferably about 0.5 to 1.5 mm. From the viewpoint of reducing the outer dimension of the obtained seal portion and improving the aesthetic appearance, it is preferable that the width Δw of the slit S is small. The depth Δd of the slit S is appropriately set so that a desired pressure is applied and the blowing of hot air around the overlapping portion 2a of the cylindrical body 2 is shielded (regulated). About 5 mm is preferable, and about 1-3 mm is more preferable. The length Δl of the slit S is not particularly limited, and can be appropriately set according to the desired seal length and the desired processing performance.

ノズル開口43bの寸法及び個数は、特に制限されないが、通常、0.3〜1mmφ程度で5〜50個程度が好ましい。   The size and number of the nozzle openings 43b are not particularly limited, but usually about 0.3 to 1 mmφ and preferably about 5 to 50.

上記の筒状体2と熱風印加ノズル42との位置関係は、筒状体2の重ね合わせ部2a周辺への過度の熱印加を緩和して所望のシール性能を得るべく、熱風の圧力及び温度等に応じて適宜調整されるが、通常、筒状体2と熱風印加ノズル42の凸端面43aとの距離を0.5〜4mm程度にすることが好ましい。   The positional relationship between the cylindrical body 2 and the hot air application nozzle 42 is such that the pressure and temperature of the hot air are obtained in order to relieve excessive heat application to the periphery of the overlapping portion 2a of the cylindrical body 2 and obtain a desired sealing performance. The distance between the cylindrical body 2 and the convex end surface 43a of the hot air application nozzle 42 is usually preferably about 0.5 to 4 mm.

内部ヒータ47は、支持部材としての中空円筒状のステンレス製の支持リング48と発熱部材49とを有する(図2参照)。支持リング48の外周壁には、貫通孔48aが形成され、この貫通孔48a内に発熱部材49が配設されている。支持リング48の内径は、充填手段21の充填ノズル22の外径よりも大きく設定されており、図示しない冶具により、充填ノズル22の外周に、支持リング48が着脱自在に固定されている。   The internal heater 47 has a hollow cylindrical stainless steel support ring 48 and a heat generating member 49 as support members (see FIG. 2). A through hole 48a is formed in the outer peripheral wall of the support ring 48, and a heat generating member 49 is disposed in the through hole 48a. The inner diameter of the support ring 48 is set larger than the outer diameter of the filling nozzle 22 of the filling means 21, and the support ring 48 is detachably fixed to the outer periphery of the filling nozzle 22 by a jig (not shown).

発熱部材49は、略円柱状の発熱体49aと、金属切片49bと、封止剤49cとを有する(図5参照)。この発熱部材49は、金属切片49bの裏面側に発熱体49aを当接した状態で、封止剤49cにより接着固定したものである。そして、この発熱部材49は、発熱体49aの長手方向の両端に接続された非発熱体(図示せず)によって、支持リング48の貫通孔48aの長手方向において着脱自在に懸架されており、これにより、充填ノズル22の外周とは接触せず、且つ、筒状体2の内周面側から重ね合わせ部2a(の裏面)に接触する位置に、発熱部材49が配置されている(図5参照)。   The heating member 49 includes a substantially cylindrical heating element 49a, a metal piece 49b, and a sealant 49c (see FIG. 5). The heat generating member 49 is bonded and fixed with a sealant 49c in a state where the heat generating body 49a is in contact with the back surface side of the metal piece 49b. The heat generating member 49 is detachably suspended in the longitudinal direction of the through hole 48a of the support ring 48 by a non-heat generating body (not shown) connected to both ends of the heat generating body 49a in the longitudinal direction. Thus, the heating member 49 is disposed at a position that does not contact the outer periphery of the filling nozzle 22 and contacts the overlapping portion 2a (the back surface thereof) from the inner peripheral surface side of the cylindrical body 2 (FIG. 5). reference).

図5は、本実施形態における熱風シールの原理を示す断面図である。本実施形態では、重ね合わせ部2aの裏面側から内部ヒータ47による接触加熱を行いつつ、熱風印加ノズル42から重ね合わせ部2aの表面側へ熱風を吹き付けることにより、重ね合わせ部2aを熱融着する。上述した構成の熱風印加ノズル42を採用しているので、ノズル開口43bから噴射される熱風は、スリットSに規制されて重ね合わせ部2aに局所的に吹き付けられる(図中、実線矢印を参照)。このとき、随伴流(図中、破線矢印を参照)が発生し、重ね合わせ部2a周辺の温度上昇が抑制される。また、重ね合わせ部2aに吹き付けられた熱風は、ノズル本体43と重ね合わせ部2a周辺との間の空間Wから外方へと効率的に排出されるので、重ね合わせ部2a周辺の温度上昇が抑制される。さらに、凸端面43aにおける肉厚△tが各々1mm以下の薄肉に形成されているので、ノズル本体43の昇温による筒状体2の重ね合わせ部2a及びその周辺への熱影響も抑制される。そのため、重ね合わせ部2aへ所望の熱印加が行われるとともに、重ね合わせ部2aへの過度の熱印加が緩和される。その上さらに、筒状体2の重ね合わせ部2aの裏面側から内部ヒータ47で接触加熱しているので、重ね合わせ部2aが十分に加温され、非熱融着部分の存在割合が少ない状態で熱融着が実行される。そのため、均一な熱融着が促進される。これにともない、吹き付ける熱風の温度を低く設定することが可能となるので、プロセス裕度が格別に高められるとともに、重ね合わせ部2a周辺の外観不良の発生がより一層抑制される。しかも、内部ヒータ47の発熱部材49は、充填ノズル22と接触しない構成となっているので、筒状フィルム成形体3内に冷蔵食品や冷凍食品等の低温の物品を充填する場合においても、それらの物品への熱の印加が抑制される。したがって、熱の印加による内容物の風味変化や変色が抑制される。   FIG. 5 is a cross-sectional view showing the principle of hot air sealing in the present embodiment. In the present embodiment, hot air is blown from the hot air application nozzle 42 to the surface side of the overlapping portion 2a while performing contact heating from the back side of the overlapping portion 2a with the internal heater 47, so that the overlapping portion 2a is thermally fused. To do. Since the hot air application nozzle 42 having the above-described configuration is adopted, the hot air sprayed from the nozzle opening 43b is locally blown to the overlapping portion 2a by being regulated by the slit S (see solid line arrows in the figure). . At this time, an accompanying flow (see the broken line arrow in the figure) is generated, and the temperature rise around the overlapping portion 2a is suppressed. Further, since the hot air blown to the overlapping portion 2a is efficiently discharged outward from the space W between the nozzle body 43 and the periphery of the overlapping portion 2a, the temperature rise around the overlapping portion 2a is increased. It is suppressed. Furthermore, since the thickness Δt of the convex end surface 43a is formed to be 1 mm or less, the thermal effect on the overlapping portion 2a of the cylindrical body 2 and its periphery due to the temperature rise of the nozzle body 43 is also suppressed. . Therefore, desired heat application is performed to the overlapping portion 2a, and excessive heat application to the overlapping portion 2a is reduced. Furthermore, since contact heating is performed by the internal heater 47 from the back surface side of the overlapping portion 2a of the cylindrical body 2, the overlapping portion 2a is sufficiently heated, and the existence ratio of the non-thermally fused portion is small. The heat fusion is performed. Therefore, uniform heat fusion is promoted. As a result, the temperature of the hot air to be blown can be set low, so that the process margin is significantly increased and the appearance defects around the overlapping portion 2a are further suppressed. Moreover, since the heat generating member 49 of the internal heater 47 is configured not to contact the filling nozzle 22, even when the tubular film molded body 3 is filled with a low-temperature article such as refrigerated food or frozen food. Application of heat to the article is suppressed. Therefore, the flavor change and discoloration of the contents due to the application of heat are suppressed.

熱風の吹き付け圧力は、所望の熱風シールが実行されるべく、熱風印加ノズル42と重ね合わせ部2aとの距離、使用する合成樹脂フィルム1の種類や厚さ、剛性、融点等に応じて適宜設定され、特に限定されるものではないが、0.15〜0.5MPa程度であることが好ましく、0.2〜0.4MPaであることがより好ましい。なお、熱風の吹き付け圧力は、上述した図示しない加圧調整機構に設置された圧力センサにて計測され、また、その加圧調整機構により増減調整される。   The hot air blowing pressure is appropriately set according to the distance between the hot air application nozzle 42 and the overlapping portion 2a, the type and thickness of the synthetic resin film 1 to be used, the rigidity, the melting point, and the like so that the desired hot air sealing is performed. Although not particularly limited, it is preferably about 0.15 to 0.5 MPa, and more preferably 0.2 to 0.4 MPa. The hot air blowing pressure is measured by a pressure sensor installed in the above-described pressure adjusting mechanism (not shown), and is increased or decreased by the pressure adjusting mechanism.

熱風の温度は、所望の熱風シールが実行されるべく、内部ヒータ47の使用有無及び設定温度、熱風印加ノズル42と重ね合わせ部2aとの距離、使用する合成樹脂フィルム1の種類や厚さ、剛性、融点、処理速度等に応じて適宜設定され、特に限定されるものではない。
以下、ASTM D−2732に準拠して測定される120℃の熱収縮率が縦方向(MD)/横方向(TD)=15〜30%/10〜20%程度の高い熱収縮性を有する合成樹脂フィルム1を用いる場合について例示する。内部ヒータ47を使用しない場合、熱風の温度は300〜420℃程度が必要とされる。これに対し、設定温度100〜150℃程度で内部ヒータ47を使用することで、比較的に低温でも良好な熱風シールを実現でき、230〜290℃程度の熱風の温度で、良好な熱風シールを実行することができる。熱風の温度が低いと、重ね合わせ部2a及びその周辺の外観不良の発生が格段に抑制されるとともに、フィルムの収縮緩和と多層フィルムの層破壊が抑制されて安定した熱風シールを実現できる点でメリットがある。また、内部ヒータ47を使用することで、重ね合わせ部2aの表面側及び裏面側の温度差が緩和されて重ね合わせ部が短時間で十分に加温されるので、熱風シールの処理時間の短縮が可能となる。なお、熱風の温度及び内部ヒータ47の温度は、上述した図示しない温度調整機構により増減調整され、該温度調整機構に設置された温度センサにて計測される。
The temperature of the hot air is determined so that the desired hot air sealing is performed, whether or not the internal heater 47 is used and the set temperature, the distance between the hot air application nozzle 42 and the overlapping portion 2a, the type and thickness of the synthetic resin film 1 to be used, It is appropriately set according to rigidity, melting point, processing speed, etc., and is not particularly limited.
Hereinafter, the composition having a high heat shrinkage of 120 ° C. measured in accordance with ASTM D-2732 in the machine direction (MD) / lateral direction (TD) = 15-30% / 10-20%. The case where the resin film 1 is used is illustrated. When the internal heater 47 is not used, the temperature of the hot air is required to be about 300 to 420 ° C. On the other hand, by using the internal heater 47 at a set temperature of about 100 to 150 ° C., a good hot air seal can be realized even at a relatively low temperature, and a good hot air seal can be achieved at a hot air temperature of about 230 to 290 ° C. Can be executed. When the temperature of the hot air is low, the occurrence of appearance defects in the overlapped portion 2a and its surroundings is remarkably suppressed, and the film shrinkage relaxation and the layer breakage of the multilayer film are suppressed, thereby realizing a stable hot air seal. There are benefits. Further, by using the internal heater 47, the temperature difference between the front surface side and the back surface side of the overlapping portion 2a is alleviated and the overlapping portion is sufficiently heated in a short time, so the processing time of hot air sealing is shortened. Is possible. The temperature of the hot air and the temperature of the internal heater 47 are adjusted by a temperature adjusting mechanism (not shown) described above and measured by a temperature sensor installed in the temperature adjusting mechanism.

上記の通り、重ね合わせ部2aが熱風シールされることにより、略円筒状の筒状フィルム成形体3が成形される(図1参照)。この筒状フィルム成形体3内には、上述した充填ノズル22から被包装物が充填され、かくして被包装物が充填された筒状フィルム成形体3は、送りローラ12a,12bに挟持されて図示下方へと移送される。   As described above, the superposed portion 2a is sealed with hot air to form a substantially cylindrical tubular film molded body 3 (see FIG. 1). The tubular film molded body 3 is filled with the article to be packaged from the filling nozzle 22 described above, and thus the cylindrical film molded body 3 filled with the article to be packaged is sandwiched between the feed rollers 12a and 12b. It is transferred downward.

封止手段51は、絞りローラ52a,52b及び封止機構53を有する。封止手段51は、被包装物が充填された筒状フィルム成形体3を絞りローラ52a,52bにて所定の間隔で外部から押圧し、その押圧部分の被包装物を押しのけた後、封止機構53にてその押圧された領域の合成樹脂フィルム1を集束して封止する。封止機構53における封止処理は、合成樹脂フィルム1の集束部に超音波、高周波又は熱を印加して融着させる手法、合成樹脂フィルム1の集束部に合成樹脂製又は金属製の線材等をかしめる手法、及びこれらを併用する手法等、公知の手法が採用される。   The sealing unit 51 includes squeezing rollers 52 a and 52 b and a sealing mechanism 53. The sealing means 51 is configured to press the cylindrical film molded body 3 filled with an object to be packaged from the outside at predetermined intervals by the squeezing rollers 52a and 52b, and then to dissipate the object to be packaged at the pressed portion. The mechanism 53 focuses and seals the synthetic resin film 1 in the pressed area. The sealing process in the sealing mechanism 53 includes a technique of applying ultrasonic waves, high frequency, or heat to the converging part of the synthetic resin film 1 for fusion, a synthetic resin or metal wire rod for the converging part of the synthetic resin film 1, etc. Known methods such as a method of caulking and a method of using them together are adopted.

上記の封止処理により、両端部が封止された筒状包装体4が製造される。なお、両端部が封止された筒状包装体4を、封止処理と同時に又は後続する切断工程において、個々の筒状包装体4へと分割してもよい。   By the above sealing process, the cylindrical package 4 having both ends sealed is manufactured. In addition, you may divide | segment the cylindrical packaging body 4 by which the both ends were sealed into each cylindrical packaging body 4 simultaneously with a sealing process, or in the subsequent cutting process.

なお、合成樹脂フィルム1の素材は、熱風の印加による熱融着が可能なものであれば、特に制限なく用いることができ、例えば、高密度又は低密度ポリエチレン(PE)やポリプロピレン(PP)及びこれらの共重合体等に代表されるポリオレフィン系樹脂、ナイロン、ポリメタキシリレンアジパミド(MXD6ナイロン)等に代表されるポリアミド系樹脂、ブタジエンを加えたハイインパクトポリスチレン(HIPS)に代表されるポリスチレン系樹脂が挙げられる。これらのなかでも、熱風シール特性、環境への配慮及び耐熱性の観点から、高密度ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂が好適に用いられる。なお、上記において共重合体とは、他の共重合体成分を含むものを包含し、他の共重合体成分には、所謂α−オレフィンが含まれる。   In addition, the raw material of the synthetic resin film 1 can be used without a restriction | limiting especially if it can heat-seal | fuse by application of a hot air, for example, high density or low density polyethylene (PE), polypropylene (PP), and Polyolefin resins typified by these copolymers, polyamide resins typified by nylon, polymetaxylylene adipamide (MXD6 nylon), polystyrene typified by high impact polystyrene (HIPS) with butadiene added Based resins. Among these, polyolefin resins such as high-density polyethylene and polypropylene are preferably used from the viewpoints of hot air sealing characteristics, environmental considerations, and heat resistance. In the above, the copolymer includes those containing other copolymer components, and the other copolymer components include so-called α-olefins.

合成樹脂フィルム1は、単層のフィルムであっても、複数のフィルムが積層された積層フィルムであってもよく、種々の機能性を付与可能である観点から、例えば、ベースフィルムの片面及び/又は両面にシーラントフィルムを積層させた積層フィルムが好適に用いられる。なお、上記の積層フィルムには、必須とされる各々の層の間に、接着層やガスバリア層等を介在したものが包含される。この種の積層フィルムは、例えば、2枚以上のフィルムを貼り合わせるドライラミネート法や、一方のフィルム上に他方の樹脂組成物を溶融押出して積層させる押出しラミネート法の他、樹脂組成物を共押出した後に冷却して積層を成形する共押出法等の公知の手法により製造可能である。   The synthetic resin film 1 may be a single-layer film or a laminated film in which a plurality of films are laminated. From the viewpoint that various functions can be imparted, for example, one side of the base film and / or Or the laminated film which laminated | stacked the sealant film on both surfaces is used suitably. The laminated film includes a film in which an adhesive layer, a gas barrier layer, or the like is interposed between the required layers. This type of laminated film includes, for example, a dry lamination method in which two or more films are bonded together, an extrusion lamination method in which the other resin composition is melt-extruded and laminated on one film, and a resin composition is co-extruded. Then, it can be manufactured by a known method such as a co-extrusion method in which a laminate is formed by cooling.

レトルト用途に用いる場合には、合成樹脂フィルム1は、レトルト殺菌処理に耐え得るフィルム強度及び耐熱性を有することが要求されるので、例えば、ベースフィルムとしてのポリアミド系樹脂フィルム層の片面及び/又は両面に、シーラント層としてのポリエチレンやポリプロピレン等のポリオレフィン系樹脂層を設けた積層フィルムが好適に用いられる。   When used for retort applications, the synthetic resin film 1 is required to have film strength and heat resistance that can withstand retort sterilization treatment. For example, one side of a polyamide-based resin film layer as a base film and / or A laminated film provided with a polyolefin resin layer such as polyethylene or polypropylene as a sealant layer on both sides is preferably used.

上述した自動充填包装機100においては、熱風の吹き付けが重ね合わせ部2aに局所的に収束されるとともに、重ね合わせ部2a周辺における熱が外部へ効果的に拡散されるので、重ね合わせ部2a周辺への過度の熱印加が緩和される。したがって、この自動充填包装機100は、シーラント層が高い熱収縮性を有する合成樹脂フィルム1(延伸処理されたシーラント層を有する積層フィルム、共押出共延伸積層フィルム)や、ASTM D−2732に準拠して測定される120℃の熱収縮率が縦方向(MD)/横方向(TD)=15〜30%/10〜20%程度の高い熱収縮性を有する合成樹脂フィルム1を用いても、シール強度に優れるとともに重ね合わせ部(シール部)及びシール部周辺の外観良好な筒状フィルム成形体3及び筒状包装体4が簡易に作製可能であり、プロセス裕度が格別に高められる点において、従来に比して優位性を有する。これらの高い熱収縮性を有する合成樹脂フィルム1としては、例えば、ポリオレフィン系樹脂を高延伸した単層フィルム、ポリアミド系樹脂フィルム層の片面及び/又は両面に高延伸したポリオレフィン系樹脂フィルム層をラミネートした積層フィルム、共押出法により成形されインフレーション法で共延伸された共押出共延伸積層フィルム(例えば、ポリアミド系樹脂フィルム層の片面及び/又は両面にポリオレフィン系樹脂フィルム層が設けられた積層フィルム)が挙げられる。   In the automatic filling and packaging machine 100 described above, the blowing of hot air is locally converged on the overlapping portion 2a and the heat around the overlapping portion 2a is effectively diffused to the outside. Excessive heat application to is reduced. Therefore, this automatic filling and packaging machine 100 is compliant with the synthetic resin film 1 (laminate film having a stretched sealant layer, co-extrusion co-stretch laminate film) and ASTM D-2732 in which the sealant layer has high heat shrinkability. Even if using the synthetic resin film 1 having a high heat shrinkage of about 120-30 ° C. and a heat shrinkage of 120 ° C. in the machine direction (MD) / transverse direction (TD) = 15-30% / 10-20%, The cylindrical film molded body 3 and the cylindrical packaging body 4 having excellent sealing strength and good appearance around the overlapping portion (sealing portion) and the sealing portion can be easily produced, and the process tolerance is particularly enhanced. , Has advantages over the conventional. As these synthetic resin films 1 having high heat shrinkability, for example, a single layer film obtained by highly stretching a polyolefin resin, and a polyolefin resin film layer highly stretched on one side and / or both sides of a polyamide resin film layer are laminated. Laminated film, co-extruded co-stretched laminated film formed by co-extrusion method and co-stretched by inflation method (for example, laminated film in which polyolefin resin film layer is provided on one side and / or both sides of polyamide resin film layer) Is mentioned.

一方、自動充填包装機100に熱収縮性のない又は熱収縮性に乏しい合成樹脂フィルム1を適用した場合にも、シール強度に優れるとともに重ね合わせ部(シール部)及びシール部周辺の外観良好な筒状フィルム成形体3及び筒状包装体4が格別簡易に作製可能であり、プロセス裕度が格別に高められる点において、従来に比して優位性を有するものとなる。   On the other hand, when the synthetic resin film 1 having no heat shrinkage or poor heat shrinkability is applied to the automatic filling and packaging machine 100, the seal strength is excellent and the appearance of the overlapping portion (seal portion) and the seal portion is good. The tubular film molded body 3 and the tubular packaging body 4 can be manufactured exceptionally easily and have an advantage over the prior art in that the process tolerance is significantly increased.

以上、上述した自動充填包装機100及び筒状フィルム成形体3の製造装置によれば、シール強度に優れるとともに重ね合わせ部2a及びその周辺の外観良好な筒状フィルム成形体3及び筒状包装体4が得られる。しかも、プロセス裕度の向上が図られ、汎用性、生産性及び経済性の向上が図られる。   As described above, according to the automatic filling and packaging machine 100 and the apparatus for manufacturing the cylindrical film molded body 3 described above, the cylindrical film molded body 3 and the cylindrical packaged body having excellent sealing strength and good appearance in the overlapping portion 2a and its surroundings. 4 is obtained. In addition, process tolerance is improved, and versatility, productivity, and economy are improved.

なお、本発明は、上記の実施形態のみに限定されるものではなく、その要旨を逸脱しない限り、種々の形態で実施することができる。   In addition, this invention is not limited only to said embodiment, Unless it deviates from the summary, it can implement with a various form.

例えば、図6及び図7に示すように、ノズル本体43の凸状構造を変更してもよい。これらの構成であっても、上述した第1実施形態と同様の作用効果が奏される。   For example, as shown in FIGS. 6 and 7, the convex structure of the nozzle body 43 may be changed. Even if it is these structures, the effect similar to 1st Embodiment mentioned above is show | played.

以下、実施例及び比較例により本発明を詳細に説明するが、本発明はこれらに特に限定されるものではない。   EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention in detail, this invention is not specifically limited to these.

(実施例1)
まず、以下の方法により、高収縮性フィルムを作製した。まず、最終フィルムの層構成がポリプロピレン「融点:135℃、MFR:5、厚み:15μm」/ポリプロピレン系接着性樹脂[融点:140℃、MFR:8、厚み:5μm]/MXDナイロン[融点:240℃、厚み:5μm]/ポリプロピレン系接着性樹脂[融点:140℃、MFR:8、厚み:5μm]/ポリプロピレン[融点:135℃、MFR:5、厚み:15μm]の5層フィルム(45μm)を、口径200mmの環状5層ダイを用いて管状に溶融共押出しした。この管状体を過冷却後、インフレーション二軸延伸法を用いて縦方向(MD方向)に約4倍、横方向(TD方向)に約5倍に同時二軸延伸し、熱処理後、最終厚み約45μm、フィルム幅約1mの共押出共延伸積層(5層)フィルムを得た。得られた幅約1mの積層フィルムを巻き取り、そのフィルムを捲きほどきながら幅96mmに裁断し、再度巻き取ることで、帯状の合成樹脂フィルム1として使用する高収縮性フィルムの原反ロールを作製した。
Example 1
First, a highly shrinkable film was produced by the following method. First, the layer structure of the final film is polypropylene “melting point: 135 ° C., MFR: 5, thickness: 15 μm” / polypropylene adhesive resin [melting point: 140 ° C., MFR: 8, thickness: 5 μm] / MXD nylon [melting point: 240 C., thickness: 5 μm] / polypropylene adhesive resin [melting point: 140 ° C., MFR: 8, thickness: 5 μm] / polypropylene [melting point: 135 ° C., MFR: 5, thickness: 15 μm] Then, it was melt-coextruded into a tubular shape using an annular five-layer die having a diameter of 200 mm. After this tube is supercooled, it is simultaneously biaxially stretched approximately 4 times in the machine direction (MD direction) and approximately 5 times in the transverse direction (TD direction) using the inflation biaxial stretching method. A co-extrusion co-stretched laminated (5 layers) film having a thickness of 45 μm and a film width of about 1 m was obtained. The obtained laminated film having a width of about 1 m is wound, cut into a width of 96 mm while unrolling the film, and wound again to form a highly shrinkable film roll used as the belt-shaped synthetic resin film 1. Produced.

上記の高収縮性フィルムの120℃の熱収縮率を、ASTM D−2732−03に準拠し、長手方向に約20cmの長さで切断して得た試験片を用いて、以下の手順で測定したところ、縦方向(MD)/横方向(TD)=20%/17%であった。
[測定方法]
試験片を温度20℃、相対湿度60%の条件下で24時間放置保管した後、縦方向(MD方向)と横方向(TD方向)の寸法を測定(MD方向で約20cm間隔、2ケ所を測定。MD方向を測定した位置でTD方向も2ケ所を測定。)し、それぞれの長さの平均値をL1MD及びL1TDとする。次に、試験片を温度120℃の熱水中で20分間熱処理した後、試験片の表面に付着した水分をろ紙で除去し、温度20℃、相対湿度60%の条件下で24時間放置保管した後、縦方向(MD方向)と横方向(TD方向)の寸法(熱処理前に測定したそれぞれの部分)を測定し、それぞれの長さの平均値をL2MD及びL2TDとする。
そして、次式を用いて、MD方向及びTD方向の熱収縮率を算出する。
MD方向の熱収縮率(%) = 100×(L1MD−L2MD)/L1MD
TD方向の熱収縮率(%) = 100×(L1TD−L2TD)/L1TD
The heat shrinkage rate at 120 ° C. of the above highly shrinkable film was measured according to the following procedure using a test piece obtained by cutting in a length direction of about 20 cm in accordance with ASTM D-2732-03. As a result, the longitudinal direction (MD) / lateral direction (TD) was 20% / 17%.
[Measuring method]
After the specimen was stored for 24 hours under conditions of a temperature of 20 ° C. and a relative humidity of 60%, the dimensions in the vertical direction (MD direction) and the horizontal direction (TD direction) were measured (approximately 20 cm intervals in the MD direction, two locations). (Measure two positions in the TD direction at the position where the MD direction is measured.) The average value of each length is taken as L1 MD and L1 TD . Next, after heat-treating the test piece in hot water at a temperature of 120 ° C. for 20 minutes, the water adhering to the surface of the test piece is removed with a filter paper and stored for 24 hours at a temperature of 20 ° C. and a relative humidity of 60%. after, the dimension in the longitudinal direction (MD direction) and transverse direction (TD direction) of the (each portion was measured before the heat treatment) was measured, each of the average length and L2 MD and L2 TD.
And the thermal contraction rate of MD direction and TD direction is calculated using following Formula.
Thermal shrinkage in MD direction (%) = 100 × (L1 MD− L2 MD ) / L1 MD
Thermal contraction rate (%) in TD direction = 100 × (L1 TD −L2 TD ) / L1 TD

次に、自動充填包装機100として、熱風シール方式の旭化成ケミカルズ(株)社製「ADP(登録商標)F型」)を用い、表1に記載の凸状構造を有する熱風印加ノズル42(図4参照)及び内部ヒータ47(図5参照)を設置して、以下の手順で、筒状包装体4の自動充填包装を実施した。
[自動充填包装]
上記の高収縮性フィルム(原反ロール)を、この自動充填包装機100に懸架し、図1に示すように、製筒フォルダ32によりフィルムの両側縁を重ね合わせて筒状体2を成形し、図5に示すように、重ね合わせ部2aの裏面側を設定温度120度の内部ヒータ47で接触加温するとともに、重ね合わせ部2aの表面側へ熱風印加ノズル42から熱風を吹き付けることで、封筒貼りに熱風シールして折幅40mmの筒状フィルム成形体3を成形した。引き続き、この筒状フィルム成形体3内に充填ノズル22から魚肉ソーセージ原料すり身を充填し、封止手段51にて両端を200mm間隔でアルミワイヤーにて結紮密封することにより、筒状包装体4(魚肉ソーセージ包装体)を得た。
以下に、自動充填包装機100の各種設定を示す。
フィルム速度 : 35m/min
ノズル全長 : 100mm
スリットSの幅Δw : 0.5mm
ノズル開口43b : 穴径0.5mm×30個
熱風温度 : 250℃ (ノズル内部)
熱風圧力 : 0.3MPa(ノズル内部)
凸端面43aにおける肉厚△t : 表1に記載
凸端面43aの側部の切り欠き角度θ : 表1に記載
Next, as the automatic filling and packaging machine 100, a hot air sealing nozzle 42 (FIG. 1) manufactured by Asahi Kasei Chemicals Co., Ltd. “ADP (registered trademark) F type”) is used. 4) and an internal heater 47 (see FIG. 5) were installed, and the automatic packing and packaging of the tubular package 4 was performed in the following procedure.
[Automatic filling and packaging]
The above-described highly shrinkable film (raw roll) is suspended on this automatic filling and packaging machine 100, and as shown in FIG. As shown in FIG. 5, the back surface side of the overlapping portion 2 a is contact-heated by the internal heater 47 with a set temperature of 120 degrees, and hot air is blown from the hot air application nozzle 42 to the surface side of the overlapping portion 2 a. Sealing of the envelope with hot air was performed to form a tubular film molded body 3 having a folding width of 40 mm. Subsequently, the fish sausage raw material surimi is filled into the tubular film molded body 3 from the filling nozzle 22, and both ends are ligated and sealed with aluminum wires at intervals of 200 mm by the sealing means 51, so that the tubular package 4 ( Fish sausage package) was obtained.
Below, various settings of the automatic filling and packaging machine 100 will be shown.
Film speed: 35 m / min
Total nozzle length: 100mm
Width Sw of slit S: 0.5 mm
Nozzle opening 43b: Hole diameter 0.5mm x 30 Hot air temperature: 250 ° C (inside nozzle)
Hot air pressure: 0.3 MPa (inside the nozzle)
Thickness Δt at convex end surface 43a: described in Table 1 Notch angle θ of side portion of convex end surface 43a: described in Table 1

(実施例2〜5、比較例1〜2)
熱風印加ノズル42の凸状構造を表1に記載の条件に変更すること以外は、実施例1と同様に筒状包装体4を製造し、実施例1と同様の評価を行った。表1に、評価結果を示す。なお、比較例1で用いた熱風印加ノズル42は、従来品である。
(Examples 2-5, Comparative Examples 1-2)
A cylindrical package 4 was produced in the same manner as in Example 1 except that the convex structure of the hot air application nozzle 42 was changed to the conditions shown in Table 1, and the same evaluation as in Example 1 was performed. Table 1 shows the evaluation results. The hot air application nozzle 42 used in Comparative Example 1 is a conventional product.

上記のようにして得られた実施例1〜5及び比較例1〜2の筒状包装体4を用い、以下に示す評価方法に基づいて、シール強度、シール部の平均表面粗さ、シール幅のばらつき、レトルトパンク率、ピンホール率、並びに総合評価を評価した。表1に、評価結果を示す。   Using the cylindrical packaging bodies 4 of Examples 1 to 5 and Comparative Examples 1 and 2 obtained as described above, based on the evaluation method shown below, the seal strength, the average surface roughness of the seal portion, and the seal width Variation, retort puncture rate, pinhole rate, and overall evaluation were evaluated. Table 1 shows the evaluation results.

Figure 0005297839
Figure 0005297839

各測定方法及び評価基準を、以下に記す。
(1)レトルトパンク率(加圧加熱殺菌後のシール部分の破袋率)
得られた5,000本の筒状包装体4を、加熱缶内ゲージ圧が0.25MPa、温度が120℃で、20分間の条件にて加圧加熱殺菌を行い、次に、加熱缶内圧力を維持したまま温度30℃まで加圧冷却し、その後、圧力を開放し加熱缶から筒状包装体4を取り出して最終包装体とした。得られた最終包装体において、シール部分が破袋した数を調査し、次式によりレトルトパンク率(破袋率)を算出した。評価基準を以下に示す。
レトルトパンク率(%)=(破袋本数/5,000本)×100
レトルトパンク率(%) 評価記号
0.04未満 ◎
0.04以上0.1未満 ○
0.1 以上0.2未満 △
0.2 以上 ×
Each measurement method and evaluation criteria are described below.
(1) Retort puncture rate (bag breaking rate of the sealed part after pressure heat sterilization)
The obtained 5,000 cylindrical packaging bodies 4 were sterilized under pressure and heat for 20 minutes at a gauge pressure of 0.25 MPa and a temperature of 120 ° C. While maintaining the pressure, it was pressurized and cooled to a temperature of 30 ° C., then the pressure was released, and the cylindrical package 4 was taken out of the heating can to obtain a final package. In the obtained final package, the number of broken seals was investigated, and the retort puncture rate (bag breakage rate) was calculated by the following equation. The evaluation criteria are shown below.
Retort puncture rate (%) = (number of broken bags / 5,000) × 100
Retort puncture rate (%) Evaluation symbol Less than 0.04 ◎
0.04 or more and less than 0.1 ○
0.1 or more and less than 0.2
0.2 or more ×

(2)シール強度(加圧加熱殺菌後のシール強度)
シール強度の測定は、ASTM F−88 FIG.1 LAP SEALに準拠し、以下の手順で行った。
まず、上記のレトルトパンクの評価において、破袋(レトルトパンク)が発生しなかったレトルト処理後の最終包装体から、各々、無作為に10本採取し、最終包装体のシール線の真向かい側にシール線と平行に切り込みを入れて開封し、被包装物である魚肉すり身を除去し、表面に付着した魚肉すり身等を水洗し、水分をろ紙で除去した後、温度20℃、相対湿度60%の条件下にて24時間放置保管した。その後、上記のようにして得られた開封済フィルム(包装フィルム)を、シール部と直交する方向に切断し、シール部が長手方向の略中央部に存在する、幅15mm、長さ60mmの短冊状の試験片(短冊の長手方向の略中央部に、その長手方向に直交してシール線が存在するもの)を作製した。
そして、テンシロン万能試験機(商品名:RTC−1210、株式会社 オリエンテック社製)を用い、フィルムチャック部に短冊状の試験片の長手方向の両端部を固定し、チャック間距離10mm、引張速度300mm/minの条件で、シール部のせん断シール強度(シール部の破断応力)を測定し(測定1回/1本)、10本の最終包装体のシール強度の平均値を算出した。評価基準を以下に示す。
シール強度(N/15mm幅) 評価記号
35以上 ◎
25以上35未満 ○
5以上25未満 △
5未満 ×
(2) Seal strength (seal strength after pressure heat sterilization)
The measurement of seal strength is performed according to ASTM F-88 FIG. In accordance with 1 LAP SEAL, the procedure was as follows.
First, in the evaluation of the above retort puncture, 10 pieces were randomly sampled from the final package after the retort treatment in which no bag breakage (retort puncture) occurred, and the sample was directly opposite the seal line of the final package. Opened by cutting in parallel with the seal line, removing fish surimi, which is the packaged item, washing fish surimi etc. adhering to the surface with water, removing moisture with filter paper, temperature 20 ° C, relative humidity 60% And stored for 24 hours under the above conditions. Thereafter, the unsealed film (packaging film) obtained as described above is cut in a direction orthogonal to the seal portion, and a strip having a width of 15 mm and a length of 60 mm in which the seal portion is present at a substantially central portion in the longitudinal direction. A test piece (one having a seal line perpendicular to the longitudinal direction at a substantially central portion in the longitudinal direction of the strip) was prepared.
Then, using Tensilon universal tester (trade name: RTC-1210, manufactured by Orientec Co., Ltd.), both ends in the longitudinal direction of the strip-shaped test piece are fixed to the film chuck part, the distance between chucks is 10 mm, and the tensile speed is Under the condition of 300 mm / min, the shear seal strength (breaking stress of the seal portion) of the seal portion was measured (measurement once / piece), and the average value of the seal strength of the ten final package bodies was calculated. The evaluation criteria are shown below.
Seal strength (N / 15mm width) Evaluation symbol 35 or more ◎
25 or more and less than 35 ○
5 to less than 25 △
Less than 5 ×

(3)ピンホール率(シール部分のピンホール率)
上記のレトルトパンクの評価において、破袋(レトルトパンク)が発生しなかったレトルト処理後の最終包装体から、各々、無作為に1,000本採取し、メチレンブルー水溶液(100重量ppm)の中に1日間浸した。その後、メチレンブルー水溶液から最終包装体を取り出し、最終包装体のシール部の内容物の染色の有無を目視にて観察した(シール部にピンホール部分が存在すれば、その箇所からメチレンブルー水溶液が最終包装体の中に浸透するため内容物が青く染まる)。そして、シール部の内容物の染色が認められた本数を計測し、次式にしたがい、ピンホール率を算出した。評価基準を以下に示す。
シール部のピンホール率(%)=(染色した本数/1,000本)×100
シール部のピンホール率(%) 評価記号
0.1以下 ◎
0.1以上0.5未満 ○
0.5以上1.0未満 △
1.0以上 ×
(3) Pinhole ratio (pinhole ratio of seal part)
In the evaluation of the above retort puncture, 1,000 pieces were randomly collected from the final package after retort treatment in which no bag breakage (retort puncture) occurred, and the sample was placed in a methylene blue aqueous solution (100 ppm by weight). Soaked for 1 day. Thereafter, the final package was taken out from the methylene blue aqueous solution, and the presence or absence of staining of the contents of the seal portion of the final package was visually observed (if there is a pinhole portion in the seal portion, the methylene blue aqueous solution is finally packaged from that location. The content is dyed blue because it penetrates into the body). And the number by which dyeing | staining of the content of the seal | sticker part was recognized was measured, and the pinhole rate was computed according to following Formula. The evaluation criteria are shown below.
Pinhole ratio (%) of seal portion = (number of dyed / 1,000) × 100
Pinhole ratio (%) of seal part Evaluation symbol 0.1 or less ◎
0.1 or more and less than 0.5 ○
0.5 or more and less than 1.0
1.0 or more ×

(4)シール幅のばらつき(シール線の幅ばらつき)
上記のレトルトパンクの評価において、破袋(レトルトパンク)が発生しなかったレトルト処理後の最終包装体から、各々、無作為に10本採取し、最終包装体の長手方向中央部のシール線(溶融部分)の幅を、ノギスで測定(mm:小数点2桁目を四捨五入)した。測定した最終包装体10本(測定1回/1本)の最大幅と最小幅との差をシール線の幅のばらつき(mm)とし、下記の評価基準にしたがって評価した。
シール線の幅ばらつき(mm) 評価記号
0.5未満 ◎
0.5以上1.0未満 ○
1.0以上2.0未満 △
2.0以上 ×
(4) Variation in seal width (variation in seal line width)
In the evaluation of the above-mentioned retort puncture, 10 pieces were randomly sampled from the final package after retort processing in which no bag breakage (retort puncture) occurred, and a seal line ( The width of the melted part) was measured with a caliper (mm: the second decimal place was rounded off). The difference between the maximum width and the minimum width of the 10 final packaging bodies (one measurement / one measurement) was regarded as the variation (mm) in the width of the seal line, and evaluated according to the following evaluation criteria.
Seal wire width variation (mm) Evaluation symbol Less than 0.5 ◎
0.5 or more and less than 1.0 ○
1.0 or more and less than 2.0
2.0 or more ×

(5)シール部の平均表面粗さ(中心面平均値=Sa)
上記のレトルトパンクの評価において、破袋(レトルトパンク)が発生しなかったレトルト処理後の最終包装体から、各々、無作為に10本採取し、最終包装体の両端結紮部から略中央部分のシール部(溶融部分)について、フィルムの流れ方向に、シール線の幅方向中央部の平均表面粗さ(中心面平均値=Sa)を測定した。この測定においては、ミツトヨ(株)製、表面粗さ測定機サーフテストSV3000S4・3D<商品名>を使用し、触針(ダイヤモンド製)先端半径=2μm、測定速度(触針の移動速度)=1mm/s、圧力=0.75mN、サンプリングピッチ(X方向)=10μm、プロファイルピッチ(Y方向)=10μm、測定面積(X方向×Y方向)=10mm×0.1mmの条件下、画像解析(評価曲面の設定は「粗さ曲線群」、フィルタの種類は「GAUSSIAN」、X方向低域カットオフ値は「4,000μm」とした。)により、最終包装体10本(測定1回/1本)のシール部の平均表面粗さ(μm:中心面平均値=Sa)を求め、下記の評価基準にしたがって評価した。
シール線の平均表面粗さ(μm) 評価記号
10未満 ◎
10以上50未満 ○
50以上100未満 △
100以上 ×
(5) Average surface roughness of the seal portion (central surface average value = Sa)
In the evaluation of the above retort puncture, 10 pieces were randomly sampled from the final package after retort processing in which no bag breakage (retort puncture) occurred. About the seal | sticker part (molten part), the average surface roughness (center surface average value = Sa) of the width direction center part of the seal line was measured to the flow direction of the film. In this measurement, a surface roughness measuring machine Surf Test SV3000S4 · 3D <product name> manufactured by Mitutoyo Corporation was used, the tip radius of the stylus (made of diamond) = 2 μm, and the measurement speed (movement speed of the stylus) = Image analysis under the conditions of 1 mm / s, pressure = 0.75 mN, sampling pitch (X direction) = 10 μm, profile pitch (Y direction) = 10 μm, measurement area (X direction × Y direction) = 10 mm × 0.1 mm The evaluation curved surface is set to “roughness curve group”, the filter type is “GAUSSIAN”, and the X direction low-frequency cut-off value is “4,000 μm”). The average surface roughness (μm: average value of the center plane = Sa) of the seal portion of the book was determined and evaluated according to the following evaluation criteria.
Average surface roughness of seal wire (μm) Evaluation symbol Less than 10 ◎
10 or more and less than 50 ○
50 or more and less than 100
100 or more ×

(6)総合評価
以下の基準に基づき、総合評価を行った。
◎ ・・・ 各評価項目において、◎が合計3つ以上、 且つ、△及び×なし
○ ・・・ 各評価項目において、◎と○が合計3つ以上、且つ、×なし
△ ・・・ 各評価項目において、◎と○が合計2つ以下、且つ、×なし
× ・・・ 各評価項目において、×が1つ以上
(6) Comprehensive evaluation Comprehensive evaluation was performed based on the following criteria.
◎ ・ ・ ・ For each evaluation item, ◎ is 3 or more in total, and △ and × None ○ ・ ・ ・ For each evaluation item, ◎ and ○ are 3 or more in total, and × None △ ・ ・ ・ Each evaluation In items, ◎ and ○ are 2 or less in total, and × None × ・ ・ ・ In each evaluation item, 1 or more ×

本発明によれば、シール強度に優れるとともに重ね合わせ部(シール部)及びシール部周辺の外観良好な筒状フィルム成形体及び筒状包装体を簡便に製造可能であり、しかも、汎用性、生産性及び経済性が高められるので、食品その他の各種包装用途において、広く且つ有効に利用可能である。また、本発明の熱風印加ノズルは、シール部への所望の熱印加とシール部周辺への過度の熱印加の緩和とを両立し得るものであるから、熱風シール用途のノズルとして、広く且つ有効に利用可能である。   According to the present invention, it is possible to easily produce a tubular film molded body and a tubular package having excellent sealing strength and good appearance around the overlapping portion (sealing portion) and the sealing portion, and versatility and production. Therefore, it can be used widely and effectively in food and other various packaging applications. Moreover, the hot air application nozzle of the present invention can achieve both desired application of heat to the seal portion and relaxation of excessive heat application to the periphery of the seal portion, so that it is widely and effectively used as a nozzle for hot air sealing applications. Is available.

1…合成樹脂フィルム、1a,1b…両端縁、2…筒状体、2a…重ね合わせ部、3…筒状フィルム成形体、4…筒状包装体、11…フィルム供給手段、11a,11b…ローラ、12a,12b…送りローラ、21…充填手段、22…充填ノズル、23…フィードポンプ、31…製筒手段、32…製筒フォルダ、41…熱風シール手段、42…熱風印加ノズル、43…ノズル本体、43a…凸端面、43b…ノズル開口、S…スリット、T…内部空間、W…空間、θ…凸端面43aの側部の切り欠き角度、X…基準線、Y…基準線、Z…接点、47…内部ヒータ、48…支持リング、48a…貫通孔、49…発熱部材、49a…発熱体、49b…金属切片、49c…封止剤、51…封止手段、52a,52b…絞りローラ、53…封止機構、100…自動充填包装機。   DESCRIPTION OF SYMBOLS 1 ... Synthetic resin film, 1a, 1b ... Both ends edge, 2 ... Cylindrical body, 2a ... Overlapping part, 3 ... Cylindrical film molded object, 4 ... Cylindrical package, 11 ... Film supply means, 11a, 11b ... Roller, 12a, 12b ... feed roller, 21 ... filling means, 22 ... filling nozzle, 23 ... feed pump, 31 ... tube making means, 32 ... tube making folder, 41 ... hot air sealing means, 42 ... hot air applying nozzle, 43 ... Nozzle body, 43a ... convex end surface, 43b ... nozzle opening, S ... slit, T ... internal space, W ... space, θ ... notch angle on the side of convex end surface 43a, X ... reference line, Y ... reference line, Z ... Contact, 47 ... Internal heater, 48 ... Support ring, 48a ... Through hole, 49 ... Heat generating member, 49a ... Heat generating element, 49b ... Metal section, 49c ... Sealant, 51 ... Sealing means, 52a, 52b ... Roller, 53 ... Sealing mechanism 100 ... automatic filling and packaging machine.

Claims (5)

帯状の合成樹脂フィルムを筒状に湾曲させて該合成樹脂フィルムのフィルム両側縁が重ね合わせられた筒状体を形成する製筒手段と、前記筒状体の重ね合わせ部に熱風を吹き付け該重ね合わせ部を熱融着させて筒状フィルム成形体を成形する熱風シール手段と、を有する筒状フィルム成形体の製造装置であって、
前記熱風シール手段は、熱風印加ノズルを備え、
前記熱風印加ノズルは、凸状に形成されたノズル本体と、該ノズル本体の凸端面に形成されたスリットと、該スリット内に形成されたノズル開口とを有し、
前記ノズル本体は、前記凸端面における肉厚△tが各々1mm以下、且つ、前記凸端面の側部の切り欠き角度θが30度以上、である凸状構造を有し、且つ、前記凸端面に向かって肉薄となるように切り欠かれた絞込構造を有する、
筒状フィルム成形体の製造装置。
A cylinder-making means for forming a cylindrical body in which a belt-like synthetic resin film is curved into a cylindrical shape and the both side edges of the synthetic resin film are overlapped, and hot air is blown onto the overlapping portion of the cylindrical body A hot-air sealing means for forming a tubular film molded body by heat-sealing the mating portion, and a tubular film molded body manufacturing apparatus comprising:
The hot air sealing means includes a hot air application nozzle,
The hot air application nozzle has a nozzle body formed in a convex shape, a slit formed in a convex end surface of the nozzle body, and a nozzle opening formed in the slit,
Said nozzle body, said wall thickness at the convex facet △ t are each 1mm or less, and the notch angle of the sides of the convex end face θ is have a convex structure is 30 degrees or more, and, the convex end face to have a cut-out narrowing-down structure so as to be thinner toward the,
Manufacturing apparatus for cylindrical film moldings.
さらに、前記重ね合わせ部の裏面側から熱を印加する加熱手段を有する、
請求項1に記載の筒状フィルム成形体の製造装置。
Furthermore, it has a heating means for applying heat from the back side of the overlapping portion,
The manufacturing apparatus of the cylindrical film molded object of Claim 1 .
帯状の合成樹脂フィルムを供給するフィルム供給手段と、
前記合成樹脂フィルムを筒状に湾曲させて該合成樹脂フィルムのフィルム両側縁が重ね合わせられた筒状体を形成する製筒手段と、
前記筒状体の重ね合わせ部に熱風を吹き付け該重ね合わせ部を熱融着させて筒状フィルム成形体を成形する熱風シール手段と、
前記筒状フィルム成形体中に被包装物を充填する充填手段と、
前記被包装物が充填された前記筒状フィルム成形体を所定の間隔で外部から押圧し、該前記押圧された領域のフィルムを封止切断して、両端部が封止された筒状包装体を複数作製する封止手段と、
を有する自動充填包装機であって、
前記熱風シール手段は、熱風印加ノズルを備え、
前記熱風印加ノズルは、凸状に形成されたノズル本体と、該ノズル本体の凸端面に形成されたスリットと、該スリット内に形成されたノズル開口とを有し、
前記ノズル本体は、前記凸端面における肉厚△tが各々1mm以下、且つ、前記凸端面の側部の切り欠き角度θが30度以上、である凸状構造を有し、且つ、前記凸端面に向かって肉薄となるように切り欠かれた絞込構造を有する、
自動充填包装機。
Film supply means for supplying a strip-shaped synthetic resin film;
A cylinder-making means for forming a cylindrical body in which the synthetic resin film is curved into a cylindrical shape and the both side edges of the synthetic resin film are superimposed;
Hot air sealing means that blows hot air onto the overlapping portion of the cylindrical body and heat-bonds the overlapping portion to form a cylindrical film molded body; and
Filling means for filling a packaged article in the tubular film molded body;
The cylindrical package body in which both ends are sealed by pressing the cylindrical film molded body filled with the packaged object from outside at predetermined intervals, sealing and cutting the film in the pressed area. Sealing means for producing a plurality of
An automatic filling and packaging machine having
The hot air sealing means includes a hot air application nozzle,
The hot air application nozzle has a nozzle body formed in a convex shape, a slit formed in a convex end surface of the nozzle body, and a nozzle opening formed in the slit,
Said nozzle body, said wall thickness at the convex facet △ t are each 1mm or less, and the notch angle of the sides of the convex end face θ is have a convex structure is 30 degrees or more, and, the convex end face to have a cut-out narrowing-down structure so as to be thinner toward the,
Automatic filling and packaging machine.
さらに、前記重ね合わせ部の裏面側から熱を印加する加熱手段を有する、
請求項3に記載の自動充填包装機。
Furthermore, it has a heating means for applying heat from the back side of the overlapping portion,
The automatic filling and packaging machine according to claim 3 .
凸状に形成されたノズル本体と、該ノズル本体の凸端面に形成されたスリットと、該スリット内に形成されたノズル開口とを有し、
前記ノズル本体は、前記凸端面における肉厚△tが各々1mm以下、且つ、前記凸端面の側部の切り欠き角度θが30度以上、である凸状構造を有し、且つ、前記凸端面に向かって肉薄となるように切り欠かれた絞込構造を有する、
熱風印加ノズル。
A nozzle body formed in a convex shape, a slit formed in a convex end surface of the nozzle body, and a nozzle opening formed in the slit,
Said nozzle body, said wall thickness at the convex facet △ t are each 1mm or less, and the notch angle of the sides of the convex end face θ is have a convex structure is 30 degrees or more, and, the convex end face to have a cut-out narrowing-down structure so as to be thinner toward the,
Hot air application nozzle.
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