JP3839542B2 - End seal strengthening method in vertical bag making, filling and packaging method - Google Patents

End seal strengthening method in vertical bag making, filling and packaging method Download PDF

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Publication number
JP3839542B2
JP3839542B2 JP4135797A JP4135797A JP3839542B2 JP 3839542 B2 JP3839542 B2 JP 3839542B2 JP 4135797 A JP4135797 A JP 4135797A JP 4135797 A JP4135797 A JP 4135797A JP 3839542 B2 JP3839542 B2 JP 3839542B2
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Prior art keywords
heat
web
packaging
soluble film
filling
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JPH10203502A (en
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恵夫 古田
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株式会社川島製作所
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
    • B29C66/3464—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration by preheating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
    • B29C53/50—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively using internal forming surfaces, e.g. mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table

Description

【０００１】
【発明が属する技術分野】
本発明は、包装速度を低下させないで横シールのシール強度を強化する，縦型製袋充填包装方法における横シールの強化方法に関する。
【０００２】
【従来の技術】
従来の縦型製袋充填包装方法は、連続するウエブを製袋器に掛けて筒状に折上げ両側のウエブ端縁を合わせて縦シールして包装筒とし、該包装筒内に被包装物を落下充填し、かつ、包装筒の前記充填した被包装物の上側と下側を横二条シールしかつシール間をカットする構成である。
従来において、横シールの強度を強化するにはヒートシールバーのシール温度を高くするか、又はシール時間を長くとっていた。
【０００３】
【発明が解決しようとする課題】
上述したヒートシールバーのシール温度を高くして横シールを強化する方法によれば、包装速度を低下させないで済むので包装速度が大きくなるに従いシール時間（ウエブの間欠停止時間内で確保する）が比例的に短くなるから有効である。しかし、無駄紙防止のために稼働を一時停止し再び稼働するときにヒートシールバーのシール温度が異常に高温となりウエブがヒートシールバーに溶着してしまう惧れがあるので、ヒートシールバーのシール温度を高くするには限度があり包装速度の高速化（例えば、毎分１００袋以上の包装速度にすること）に対応できなかった。また、シール温度を高くしシール時間を短くすると、ウエブを構成している熱可溶性の内層フィルム同士が十分に溶着しなくなり外層フィルムとの接着も剥がれる等のシール不良となり、またウエブを構成している熱町塑性の外層フィルムにダメージを与えてしまう。
また、上述したシール時間を長くとって横シールを強化する方法によれば、包装速度の高速化に対応させることが全くできなかった。
【０００４】
本発明の目的は、上述した点を考慮して案出したもので、筒状に成形される包装材の特性にも着目して、包装速度を低下させないで横シールのシール強度を強化することができる縦型製袋充填包装方法における横シールの強化方法を提供することである。
【０００５】
【課題を解決するための手段】
本願発明は、熱可溶性フィルムと熱可塑性フィルムとを張り合わせて成る連続するウエブＦを製袋器１に掛けて前記熱可溶性フィルムが内側となる態様で筒状に折上け両側のウエブ端縁ｆを合わせて縦シールして包装筒Ｈとし、該包装筒Ｈ内に被包装物Ｆを落下充填し、かつ、包装筒Ｈの前記充填した被包装物Ｆの上側と下側を横シール・カットする縦型製袋充填包装方法において、前記ウエブＦの製袋器１よりも上流側の位置であって横シール・カット位置から辿って袋長さの倍数の長さに相当する位置において、横シール・カットを行うためのウエブＦの間欠停止時にウエブＦに幅方向に帯状に予熱し、この際、前記熱可溶性フィルム側を前記熱可溶性フィルムの溶融温度よりも数度低い温度で予熱するとともに前記熱可塑性フィルム側を前記熱可溶性フィルムの溶融温度と略同じ温度で予熱することを特徴とする縦型製袋充填包装方法における横シールの強化方法を提供する。
【０００６】
【実施の形態】
以下、本願発明の実施の形態の縦型製袋充填包装方法における横シールの強化方法を図面を参照して説明する。縦型製袋充填包装方法は、熱可溶性フィルムと熱可塑性フィルムとを張り合わせて成る連続するウエブＦを製袋器１に掛けて製袋器１の内側に通された円筒体２を包むように熱可溶性フィルムが内側となり熱可塑性フィルムが外側となる態様で筒状に折上げかつ円筒体２の側方で両側のウエブ端縁ｆを合掌状又は封筒貼り状に合わせて円筒体２の下方の横シール・カット位置よりも下方に垂下し、包装を開始して、ウエブ送りの間欠停止時に前記の両側のウエブ端縁ｆを縦シール装置３により縦シールして包装筒Ｈとするとともに横シール・カット装置４により包装筒Ｈに横二条シールしかつシール間をカットし、さらに、包装筒Ｈの前記充填した被包装物Ｆの上側と下側を横シール・カットする円筒体２内に被包装物Ｆを落下させて該包装筒Ｈ内に収容された被包装物Ｆを横シール・カット装置４に付設されたシャッター５で受け止めた後、縦シール装置３と横シール・カット装置４のシールバーをウエブから離間させ、続いて、ウエブ送り装置６によりウエブＦを下方へ一袋の長さ分だけ移送させて再び間欠停止し、再び、縦シールするとともに横シール・カットすることにより、包装筒Ｈの該包装筒Ｈ内に充填した被包装物Ｆの上側と下側を横シール・カットして袋包装品を製造するものである。
【０００７】
本願発明の実施の形態の横シールの強化方法は、上述した縦型製袋充填包装方法において、製袋器１よりも上流側のウエブＦを水平面内に移送する位置に位置調整自在に設けた予熱用シール装置７の開閉自在な上下一対の予熱用シールバー７ａ，７ｂを包装に先立ってモータ駆動により又はハンドル操作により位置合わせする。この位置合わせは、ウエブＦの横シール・カット位置から上流方向へ辿って袋長さの倍数の長さに相当する位置に合わせて予熱用シールバー７ａ，７ｂによる予熱位置が横シール・カット装置４の横二条シール位置と合致させるものである。そうして、横シール・カットを行うためのウエブＦの間欠停止時に予熱用シールバー７ａ，７ｂを閉じてウエブＦを挟み該ウエブＦに幅方向に帯状に予熱する。予熱温度は横シール・カット装置４によるシール温度よりも１０度ないし２０度位低く設定する。ウエブＦは熱可溶性フィルム（例えばポリエチレンフィルム）と熱可塑性フィルムの張り合わせであり、予熱位置におけるウエブＦの上面が熱可溶性フィルムであり、下面が熱可塑性フィルムである。従って、筒状に成形したときに、上面側の熱可溶性フィルムが筒の内側となり下面側の熱可塑性フィルムが筒の外側となる。横シールの際には、筒の内側を占める熱可溶性フィルムが溶けて互いに溶着されてシールされる。上側の予熱用シールバー７ａの予熱温度をウエブＦの上面層の熱可溶性フィルムの溶融温度よりも数度低い温度にするとともに、下側の予熱用シールバー７ｂの予熱温度をウエブＦの上面層の熱可溶性フィルムの溶融温度と略同一にするのが良い。下側の予熱用シールバー７ｂからの予熱は熱可塑性フィルムの存在によって僅かに温度低下して熱可溶性フィルム側の予熱温度と略同一となる。このような温度設定とすることにより、内側を占める熱可溶性フィルムは、溶けることはないが熱可塑性フィルム側の厚さの深い部分まで十分且つ確実に予熱される。こうして予熱された帯状の箇所は、冷めないうちに横シール・カット装置４により横二条シールされる。従って、横二条シール位置はシール温度が高くなりウエブ内面同士のシール溶着が強く行われる。
【０００８】
【発明の効果】
以上説明してきたように、本発明の縦型製袋充填包装方法における横シールの強化方法によれば、横シール・カット装置により横二条シールする時間を長く確保するものではないから包装速度を低下させないで横シールのシール強度を強化することができ、包装速度の高速化に十分に対応させることができる。また、熱可溶性フィルム側を熱可溶性フィルムの溶融温度よりも数度低い温度で予熱するとともに熱可塑性フィルム側を熱可溶性フィルムの溶融温度と略同じ温度で予熱しているので、熱可溶性フィルムをその厚さ方向の深い層にまで十分に予熱することができ、横シールの際に、ウエブ内面同士のシール溶着が確実に強化することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態の縦型製袋充填包装方法における横シールの強化方法に係り、（ａ）は説明するための包装機の概略全体図、（ｂ）は要部拡大図。
【符号の説明】
１ ・・・製袋器
Ｆ ・・・ウエブ
ｆ ・・・ウエブ端縁
Ｈ ・・・包装筒[0001]
[Technical field to which the invention belongs]
The present invention relates to a method for reinforcing a horizontal seal in a vertical bag making filling and packaging method, which enhances the seal strength of a horizontal seal without reducing the packaging speed.
[0002]
[Prior art]
The conventional vertical bag making filling and packaging method is to wrap a continuous web on a bag making machine, fold it into a cylindrical shape, align the edges of the webs on both sides, and seal it vertically to make a packaging cylinder, and to be packaged in the packaging cylinder The upper and lower sides of the filled article to be packed in the packaging cylinder are sealed in two horizontal strips and the space between the seals is cut.
Conventionally, in order to enhance the strength of the horizontal seal, the heat temperature of the heat seal bar is increased or the seal time is increased.
[0003]
[Problems to be solved by the invention]
According to the above-described method of increasing the sealing temperature of the heat seal bar and strengthening the horizontal seal, it is not necessary to reduce the packaging speed. Therefore, as the packaging speed increases, the sealing time (to ensure within the intermittent web stop time) is increased. This is effective because it is proportionally shorter. However, when the operation is temporarily stopped and restarted to prevent waste paper, the seal temperature of the heat seal bar may become abnormally high and the web may be welded to the heat seal bar. There is a limit to increasing the temperature, and it has not been possible to cope with an increase in packaging speed (for example, a packaging speed of 100 bags or more per minute). Also, if the sealing temperature is increased and the sealing time is shortened, the heat-soluble inner layer films constituting the web are not sufficiently welded to each other, resulting in poor sealing such as peeling off the adhesion with the outer layer film, and the web is also formed. It will damage the outer layer film of the thermal town plastic.
In addition, according to the above-described method of strengthening the lateral seal by taking a long sealing time, it has been impossible to cope with an increase in packaging speed.
[0004]
An object of the present invention has devised in view of the above-described points, it focuses on the characteristics of the packaging material to be molded into a cylindrical shape, to enhance the seal strength of the transverse seal without reducing packaging speed to provide a method of enhancing the transverse seals in the vertical bag filling and packaging method that can.
[0005]
[Means for Solving the Problems]
In the present invention, a continuous web F formed by laminating a heat-soluble film and a thermoplastic film is hung on the bag making machine 1 and folded in a cylindrical shape in such a manner that the heat-soluble film is inside. Are vertically sealed to form a packaging cylinder H, and the packaging material F is dropped and filled into the packaging cylinder H, and the upper and lower sides of the packaging material F in the packaging cylinder H are horizontally sealed and cut. In the vertical bag making and filling method, the web F is located upstream of the bag making device 1 and is traced horizontally at a position corresponding to a multiple of the bag length following the horizontal sealing / cutting position. When the web F for sealing and cutting is intermittently stopped, the web F is preheated in a band shape in the width direction, and at this time, the heat-soluble film side is preheated at a temperature several degrees lower than the melting temperature of the heat-soluble film. The thermoplastic film side That provides enhanced methods for lateral sealing of the vertical bag filling and packaging method characterized by preheating at approximately the same temperature as the melting temperature of the heat soluble film.
[0006]
Embodiment
Hereinafter, a method for reinforcing a horizontal seal in a vertical bag making filling and packaging method according to an embodiment of the present invention will be described with reference to the drawings. Vertical bag filling and packaging method, the heat so as to wrap the cylindrical body 2 which is passed through the inside of the bag manufacturing device 1 over the web F to the bag manufacturing device 1 for continuously made by laminating a heat-soluble film and the thermoplastic film Folded into a cylindrical shape with the soluble film on the inside and the thermoplastic film on the outside, and the side edges of the web 2 on both sides of the cylindrical body 2 are aligned in the shape of a palm or envelope, and the side below the cylindrical body 2 It hangs downward from the sealing / cutting position, starts packaging, and when the web feed is intermittently stopped, the web edge f on both sides is vertically sealed by the vertical sealing device 3 to form the packaging cylinder H and the horizontal sealing / The cutting device 4 seals two horizontal strips on the packaging cylinder H and cuts the gap between the seals. Further, the upper and lower sides of the filled article F in the packaging cylinder H are laterally sealed and cut in the cylindrical body 2 to be packaged. Drop the object F and wrap it After the article F to be packaged contained in H is received by the shutter 5 attached to the horizontal sealing / cutting device 4, the seal bars of the vertical sealing device 3 and the horizontal sealing / cutting device 4 are separated from the web. Then, the web F is moved downward by the length of one bag by the web feeding device 6 and is intermittently stopped again, and then again vertically sealed and laterally sealed and cut to enter the packaging cylinder H of the packaging cylinder H. A bag package product is manufactured by horizontally sealing and cutting the upper side and the lower side of the filled F to be packaged.
[0007]
The method of strengthening the horizontal seal according to the embodiment of the present invention is provided in the above-described vertical bag making filling and packaging method so that the position of the web F on the upstream side of the bag making machine 1 is transferred to a horizontal plane so as to be adjustable. Prior to packaging, the pair of upper and lower preheating seal bars 7a and 7b that can be opened and closed of the preheating seal device 7 are aligned by driving a motor or operating a handle. In this alignment, the preheating position by the preheating seal bars 7a and 7b is adjusted to the position corresponding to the multiple of the bag length following the upstream sealing direction of the web F from the horizontal sealing / cutting position. 4 is aligned with the horizontal double strip seal position. Thus, when the web F for lateral sealing and cutting is intermittently stopped, the preheating seal bars 7a and 7b are closed, the web F is sandwiched, and the web F is preheated in a band shape in the width direction. The preheating temperature is set 10 to 20 degrees lower than the sealing temperature by the horizontal sealing / cutting device 4. The web F is a laminate of a heat-soluble film (for example, a polyethylene film) and a thermoplastic film. The upper surface of the web F at the preheating position is a heat-soluble film, and the lower surface is a thermoplastic film. Therefore, when formed into a cylindrical shape, the heat-soluble film on the upper surface side becomes the inner side of the tube, and the thermoplastic film on the lower surface side becomes the outer side of the tube. At the time of horizontal sealing, the heat-soluble films occupying the inside of the cylinder are melted and welded together to be sealed. The preheating temperature of the upper preheating seal bar 7a is set to a temperature several degrees lower than the melting temperature of the heat-soluble film of the upper surface layer of the web F, and the preheating temperature of the lower preheating seal bar 7b is set to the upper surface layer of the web F. It is good to make it substantially the same as the melting temperature of the heat-soluble film. The preheating from the lower preheating seal bar 7b slightly decreases in temperature due to the presence of the thermoplastic film and becomes substantially the same as the preheating temperature on the heat-soluble film side. By setting such a temperature, the heat-soluble film occupying the inner side is not melted, but is preheated sufficiently and surely to the deep part on the thermoplastic film side. The strip-shaped portion preheated in this way is sealed in two horizontal strips by the horizontal sealing / cutting device 4 before cooling. Accordingly, the seal temperature is high at the horizontal double seal position, and seal welding between the web inner surfaces is strongly performed.
[0008]
【The invention's effect】
As described above, according to the method of strengthening the horizontal seal in the vertical bag making filling and packaging method of the present invention, the packaging speed is reduced because it does not ensure a long time for horizontal double sealing by the horizontal seal / cut device. Without this, the sealing strength of the horizontal seal can be enhanced, and it is possible to sufficiently cope with an increase in packaging speed. In addition, the heat-soluble film side is preheated at a temperature several degrees lower than the melting temperature of the heat-soluble film and the thermoplastic film side is preheated at a temperature substantially the same as the melting temperature of the heat-soluble film. It is possible to sufficiently preheat up to a deep layer in the thickness direction, and it is possible to surely strengthen the seal welding between the inner surfaces of the web at the time of lateral sealing.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 relates to a method for strengthening a horizontal seal in a vertical bag making filling and packaging method according to an embodiment of the present invention. .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Bag making machine F ... Web f ... Web edge H ... Packaging cylinder

Claims (1)

熱可溶性フィルムと熱可塑性フィルムとを張り合わせて成る連続するウエブを製袋器に掛けて前記熱可溶性フィルムが内側となる態様で筒状に折上げ両側のウエブ端縁を合わせて縦シールして包装筒とし、該包装筒内に被包装物を落下充填し、かつ、包装筒の前記充填した被包装物の上側と下側を横シール・カットする縦型製袋充填包装方法において、前記ウエブの製袋器よりも上流側の位置であって横シール・カット位置から辿って袋長さの倍数の長さに相当する位置において、横シール・カットを行うための前記ウエブの間欠停止時に前記ウエブを幅方向に帯状に予熱し、この際、前記熱可溶性フィルム側を前記熱可溶性フィルムの溶融温度よりも数度低い温度で予熱するとともに前記熱可塑性フィルム側を前記熱可溶性フィルムの溶融温度と略同じ温度で予熱することを特徴とする縦型製袋充填包装方法における横シールの強化方法。 A continuous web made by laminating a heat-soluble film and a thermoplastic film is put on a bag making machine, folded in a cylindrical shape in such a manner that the heat-soluble film is on the inside, vertically aligned with the web edges on both sides, and packaged In a vertical bag making filling and packaging method, wherein a package is dropped and filled into the packaging cylinder, and the upper and lower sides of the filled packaging object are horizontally sealed and cut. in a position corresponding to the length of a multiple of the bag length is traced from the transverse sealing cut position a position upstream of the bag manufacturing unit, said web when said web of intermittent stop for performing transverse sealing cut the preheated to strip in the width direction, this time, the melting of the heat soluble film the thermoplastic film side while preheating the heat soluble film side by a few degrees lower temperature than the melting temperature of the heat soluble film A method of reinforcing horizontal sealing in the vertical bag filling and packaging method characterized by preheating at approximately the same temperature as degrees.
JP4135797A 1997-01-20 1997-01-20 End seal strengthening method in vertical bag making, filling and packaging method Expired - Fee Related JP3839542B2 (en)

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JP4135797A JP3839542B2 (en) 1997-01-20 1997-01-20 End seal strengthening method in vertical bag making, filling and packaging method

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JP3839542B2 true JP3839542B2 (en) 2006-11-01

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JP4757380B2 (en) * 2000-12-15 2011-08-24 キョーラク株式会社 Filling and packaging method
US7523597B2 (en) * 2007-03-20 2009-04-28 J & F Business, Inc. Apparatus and method for mounting a bag former

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