JPH09226725A - Heater for paper container for liquid - Google Patents
Heater for paper container for liquidInfo
- Publication number
- JPH09226725A JPH09226725A JP8036564A JP3656496A JPH09226725A JP H09226725 A JPH09226725 A JP H09226725A JP 8036564 A JP8036564 A JP 8036564A JP 3656496 A JP3656496 A JP 3656496A JP H09226725 A JPH09226725 A JP H09226725A
- Authority
- JP
- Japan
- Prior art keywords
- oven
- paper container
- hot air
- liquid paper
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、果汁や清酒などを
収納する切妻屋根形の液体用紙容器の製箱、充填工程に
おいて、仮折りした液体用紙容器の頂部や底部を熱圧着
して密封するために、表面の熱可塑性樹脂層を均一に溶
かすための液体用紙容器の加熱装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gable-roof-shaped liquid paper container for storing fruit juice, sake, and the like, which is heat-pressed and sealed at the top and bottom of a temporarily folded liquid paper container in a box making and filling process. Therefore, the present invention relates to a heating device for a liquid paper container for uniformly melting a thermoplastic resin layer on the surface.
【０００２】[0002]
【従来の技術】従来より、切妻屋根形などの液体用紙容
器を構成する熱可塑性樹脂層を積層した紙積層材料につ
いては、例えば表面側から、熱可塑性樹脂層であるポリ
エチレン層（３０μｍ）と紙材料層（３１０ｇ／ｍ2 ）
とポリエチレン層（２５μｍ）とアルミニウム箔（９μ
ｍ）とポリエステルフィルム（１２μｍ）と熱可塑性樹
脂であるポリエチレン層（６０μｍ）とを、適宜に積層
した紙積層材料などが、広く用いられている。この液体
用紙容器のアルミニウム箔については、果汁や清酒など
の充填物が空気中の酸素や充填物の香気成分などを遮断
する、ガスバリアー層として積層したものである。2. Description of the Related Art Conventionally, a paper laminated material in which a thermoplastic resin layer which constitutes a gable roof type liquid paper container is laminated is, for example, a polyethylene layer (30 μm) which is a thermoplastic resin layer and a paper Material layer (310 g / m 2 )
And polyethylene layer (25μm) and aluminum foil (9μ
m), a polyester film (12 μm) and a polyethylene layer (60 μm) which is a thermoplastic resin are appropriately laminated, and a paper laminated material and the like are widely used. The aluminum foil of this liquid paper container is one in which a filler such as fruit juice or sake is laminated as a gas barrier layer that blocks oxygen in the air and aroma components of the filler.
【０００３】このような、表面に熱可塑性樹脂層を積層
した紙積層材料製の切妻屋根形などの液体用紙容器の製
箱、充填工程において、仮折りした液体用紙容器の開口
部の内側全周の密封する部分の熱圧着を容易にするため
に、この密封する部分の近傍に移動して位置させる加熱
装置に備えた加熱オーブンにより熱風を吹きつけて、表
面の熱可塑性樹脂層を溶かし、密封する部分を合わせ接
合する作業が行われている。ここで、前記液体用紙容器
の熱可塑性樹脂層を溶かすには、図３（ａ）に示すよう
な、加熱装置１０の加熱オーブン１１を液体用紙容器２
０の仮折りされた頂部又は底部にあてがって、加熱オー
ブン１１から熱風を前記紙容器の密封される部分２１，
２１に向かって吹き付けることによって行われる。すな
わち、図３（ｂ）に示すように、加熱オーブン１１は液
体用紙容器２０の頂部又は底部の端部である、密封する
部分２１，２１を内外から囲むような、センターオーブ
ン１１Ａとサイドオーブン１１Ｂ，１１Ｂの構造となっ
ている。また、図３（ｃ）に示すように、液体用紙容器
の内面に熱風を吹きつける加熱オーブン１１のセンタオ
ーブン１１Ａの全周（オーブンのコーナー部１５を含
む）の前記密封する部分２１，２１に臨む面には、１．
０〜２．０ｍｍφ程度の多数の熱風吹き出し用孔ｂ，ｂ
…が、横に複数段にわたり千鳥模様状或いは並列され
て、しかも同ピッチで貫設されている。In such a box-making and filling process of a gable-roof type liquid paper container made of a paper laminated material having a thermoplastic resin layer laminated on the surface, the entire inner circumference of the opening of the temporarily folded liquid paper container is formed. In order to facilitate thermocompression bonding of the sealed part, hot air is blown by a heating oven provided in a heating device that is moved to and located near the sealed part to melt the thermoplastic resin layer on the surface and seal it. Work to join the parts to be joined is performed. Here, in order to melt the thermoplastic resin layer of the liquid paper container, the heating oven 11 of the heating device 10 as shown in FIG.
0, the hot-air from the heating oven 11 is applied to the temporarily-folded top or bottom portion of the paper container 21 to be sealed,
It is done by spraying towards 21. That is, as shown in FIG. 3 (b), the heating oven 11 includes a center oven 11 A and a side oven 11 B that surround the sealed portions 21 and 21 that are the top or bottom ends of the liquid paper container 20 from inside and outside. , 11B. Further, as shown in FIG. 3C, the sealing portions 21, 21 of the entire circumference (including the corner portion 15) of the center oven 11A of the heating oven 11 which blows hot air onto the inner surface of the liquid paper container. On the side facing: 1.
A large number of hot air blowing holes b of 0 to 2.0 mmφ
, Are arranged in a zigzag pattern or in parallel in a plurality of rows horizontally, and are penetrated at the same pitch.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前述し
た加熱オーブン１１のセンターオーブン１１Ａに設けら
れた多数の熱風吹き出し用孔ｂ，ｂ…によって熱風を吹
きつけられた箇所の熱可塑性樹脂層が部分的に溶融し、
図４に示すように、熱溶融不良箇所３３やピンホール３
２が発生し、また、バリアー層２５としてアルミニウム
箔を使用した場合は（酸化ケイ素や酸化マグネシウム等
を蒸着し、バリアー層とする場合もある）熱伝導性がよ
いので密封する部分以外にも熱がゆきわたり、紙に含ま
れる水分が蒸発し、この蒸気の逃げ場がなくなりバリア
ー層２５或いは熱可塑性樹脂層２６から発泡（膨らみ）
３１などが発生し、従って、前記密封する部分２１，２
１に熱圧着不良が生じて液体用紙容器の液漏れなどの原
因になっていた。さらに、発泡が大きく発生すると加熱
オーブン１１と接触し、バリアー層２５であるアルミニ
ウム箔が破壊される恐れがあった。However, the thermoplastic resin layer at the location where hot air is blown by the large number of hot air blowing holes b, b provided in the center oven 11A of the heating oven 11 is partially formed. Melts into
As shown in FIG. 4, the heat-melting defective portion 33 and the pinhole 3
2 occurs, and when an aluminum foil is used as the barrier layer 25 (there is also a case where silicon oxide, magnesium oxide or the like is vapor-deposited to form the barrier layer), the heat conductivity is good, so that heat is applied to a portion other than the sealed portion. And the moisture contained in the paper evaporates, and there is no escape for this vapor, and the barrier layer 25 or the thermoplastic resin layer 26 foams (bulges).
31, etc., and therefore the sealing parts 21, 2
The thermocompression bonding failure occurred in No. 1 and caused liquid leakage of the liquid paper container. Further, if the foaming occurs largely, the aluminum foil as the barrier layer 25 may be broken by coming into contact with the heating oven 11.
【０００５】そこで本発明は、上記の課題に鑑みなされ
たもので、その目的とするところは、熱風の吹きつけを
密封する部分に多くなるようにして熱溶融不良箇所やピ
ンホールを防ぎ、かつ、過度の発泡を抑えるようにした
液体用紙容器の加熱装置を提供することにある。Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to prevent hot-melting defects and pinholes by increasing the number of hot air blown portions to seal. It is an object of the present invention to provide a heating device for a liquid paper container that suppresses excessive foaming.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明の液体用紙容器の加熱装置は、図１、図２に示
すように、表面に熱可塑性樹脂層を積層した紙積層材料
製からなる、切妻屋根形などの液体用紙容器の仮折りさ
れた頂部や底部などを熱圧着して密封する部分２１，２
１に、熱風を吹き付けて表面の熱可塑性樹脂層を溶かす
加熱装置の、前記熱可塑性樹脂層を溶かす頂部や底部に
臨ませて配置され、液体用紙容器の内外面に熱風を吹き
付けるセンターオーブン１１Ａとサイドオーブン１１
Ｂ，１１Ｂからなる加熱オーブン１１と、前記加熱オー
ブン１１のセンターオーブン１１Ａ全周に、複数段にわ
たりそれぞれ異なる位置に多数の貫設された熱風吹き出
し用孔ｂ，ｂ…とを設けた液体用紙容器２０の加熱装置
１０において、前記センターオーブン１１Ａの上部より
１段目又は２段目迄の熱風吹き出し用孔ｂ，ｂ…が、他
段の孔数より多く設けられていることを特徴とする。In order to achieve the above object, a heating apparatus for a liquid paper container according to the present invention is made of a paper laminated material having a surface laminated with a thermoplastic resin layer, as shown in FIGS. 21, which are formed by thermocompression bonding the temporarily folded top and bottom of a liquid paper container such as a gable roof
1, a center oven 11A which is arranged so as to face the top or bottom of a heating device for blowing the hot air to melt the thermoplastic resin layer on the surface and to blow the hot air to the inner and outer surfaces of the liquid paper container. Side oven 11
A liquid paper container provided with a heating oven 11 composed of B and 11B, and a large number of hot air blowing holes b, b ... In the heating device 10 of No. 20, the hot-air blowing holes b, b ... from the upper part of the center oven 11A to the first or second tier are provided in a larger number than the holes in the other stages.
【０００７】また、前記液体用紙容器２０の内面に熱風
を吹きつけるセンターオーブン１１Ａの、上部より１段
目又は２段目迄に貫設された熱風吹き出し用孔ｂ，ｂ…
の貫設ピッチが、他段の貫設ピッチの２分の１としたこ
とを特徴とする。Further, the hot air blowing holes b, b ... Penetrating from the top to the first or second stage of the center oven 11A for blowing hot air to the inner surface of the liquid paper container 20.
The penetration pitch of No. 1 is set to one half of the penetration pitch of the other stage.
【０００８】また、前記センターオーブン１１Ａの上部
より１段目又は２段目迄の熱風吹き出し用孔ｂ，ｂ…の
径が、他段の孔径より大きくしたことを特徴とする。Further, the diameter of the hot air blowing holes b, b ... from the upper part of the center oven 11A to the first or second step is made larger than the hole diameters of the other steps.
【０００９】[0009]
【発明の実施の形態】図に基づき本発明の実施の形態を
説明する。図１及び図２に示すように、本発明の液体用
紙容器２０の加熱装置１０は、該紙容器の内面の熱可塑
性樹脂層２６を溶かす頂部や底部に臨ませて配置され、
液体用紙容器２０の内外面から熱風を吹きつけるセンタ
ーオーブン１１Ａとサイドオーブン１１Ｂ，１１Ｂとか
らなる加熱オーブン１１と、前記加熱オーブン１１のセ
ンターオーブン１１Ａの周囲に、複数段にわたりそれぞ
れ異なる位置に多数の貫設された熱風吹き出し用孔ｂ，
ｂ…とを設け、前記センターオーブン１１Ａの上部より
１段目又は２段目迄の熱風吹き出し用孔ｂ，ｂ…が、他
段の孔数より多く設けられている。すなわち、液体用紙
容器２０の内面に熱風を吹きつけるセンターオーブン１
１Ａの、上部より１段目又は２段目迄に貫設された熱風
吹き出し用孔ｂ，ｂ…の貫設ピッチが、他段の貫設ピッ
チの２分の１にして設けたものである。さらに、前記セ
ンターオーブン１１Ａの１段目又は２段目迄の熱風吹き
出し用孔ｂ，ｂ…の径が、他段の孔径より大きくしたも
のである。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the heating device 10 of the liquid paper container 20 of the present invention is arranged so as to face the top or bottom of the inner surface of the paper container where the thermoplastic resin layer 26 is melted.
A heating oven 11 composed of a center oven 11A and side ovens 11B and 11B for blowing hot air from the inner and outer surfaces of the liquid paper container 20, and a plurality of stages at different positions around the center oven 11A of the heating oven 11. A hot air blowing hole b formed through
, and hot air blowing holes b, b ... from the upper part of the center oven 11A up to the first or second stage are provided more than the number of holes in the other stages. That is, the center oven 1 that blows hot air onto the inner surface of the liquid paper container 20.
The hot-air blowing holes b, b ... Penetrating from the upper part to the first or second tier of 1A are provided with a half pitch of the piercing pitch of the other tier. . Further, the diameter of the hot-air blowing holes b, b ... Up to the first or second stage of the center oven 11A is made larger than the diameters of the other stages.
【００１０】[0010]
【作用】本発明の液体用紙容器の加熱装置は、図１及び
図２に示すように、加熱オーブン１１のセンターオーブ
ン１１Ａの全周に貫設された熱風吹き出し用孔ｂ，ｂ…
を、センターオーブン上方より１段目又は２段目迄の孔
数を他段の孔数より多くする、及び／又は孔の径を大き
くする（図示はしない）ことで、熱を必要とする液体用
紙容器の密封する部分２１，２１に集中的に吹きつけら
れるので、この部分が先に加熱され、内面の熱可塑性樹
脂層２６が十分に溶かされると共に、この部分の発泡が
始まり、密封する部分２１，２１の上端面に空気や蒸気
の逃げ道ができるので、下方の膨張した空気や蒸気も上
端面から放出され、発泡を小さく抑えることが可能とな
る。As shown in FIGS. 1 and 2, the apparatus for heating a liquid paper container according to the present invention has hot air blowing holes b, b ... Penetrating all around the center oven 11A of the heating oven 11.
By increasing the number of holes from the upper part of the center oven to the first or second step higher than the number of holes in the other steps and / or increasing the diameter of the holes (not shown), a liquid requiring heat. Since it is intensively sprayed on the sealed portions 21 and 21 of the paper container, this portion is heated first, the thermoplastic resin layer 26 on the inner surface is sufficiently melted, and at the same time, the foaming of this portion begins and the sealed portion. Since escape paths for air and steam are formed at the upper end surfaces of 21, 21, the expanded air and steam below are also released from the upper end surfaces, and it is possible to suppress foaming to a small level.
【００１１】[0011]
【実施例】以下、図に基づき実施例を詳細に説明する。
図１は、液体用紙容器の密封する部分の加熱装置に於け
る加熱オーブンの底面図である。また、図２は、加熱オ
ーブンのセンターオーブンに設けた熱風吹き出し用孔の
配列を示すもので、（ａ）は、１段目の貫設ピッチを他
段の貫設ピッチの半分にした説明図で、（ｂ）は、２段
目迄の貫設ピッチを他段の貫設ピッチの半分にした説明
図である。図３は、加熱装置の概略を示すもので、
（ａ）は、加熱装置の部分説明図であり、（ｂ）は、加
熱オーブンを側面から見た説明図で、（ｃ）は、センタ
ーオーブンに設けられた熱風吹き出し用孔を側面から見
た説明図である。図４は、従来の液体用紙容器の加熱装
置における、熱風を吹きつけられた表面の熱可塑性樹脂
層の状態を示す部分断面図である。Embodiments will be described in detail below with reference to the drawings.
FIG. 1 is a bottom view of a heating oven in a heating device of a sealed portion of a liquid paper container. Further, FIG. 2 shows an arrangement of holes for blowing hot air provided in the center oven of the heating oven, and (a) is an explanatory view in which the penetration pitch of the first stage is half the penetration pitch of the other stage. (B) is an explanatory view in which the penetration pitch up to the second stage is half the penetration pitch of the other stage. FIG. 3 shows an outline of the heating device.
(A) is a partial explanatory view of the heating device, (b) is an explanatory view of the heating oven as viewed from the side, and (c) is a view of a hot air blowing hole provided in the center oven as viewed from the side. FIG. FIG. 4 is a partial cross-sectional view showing the state of the thermoplastic resin layer on the surface blown with hot air in the conventional heating apparatus for liquid paper containers.
【００１２】本発明に係る液体用紙容器の加熱装置の本
体は、図示しないが支持基板と熱風供給部とガイドシリ
ンダーとエアーシリンダーを介して上昇、下降するよう
に取りつけられた外筒体が設けられており、この外筒体
の下部に加熱オーブン１１が取りつけられている。そし
て図３（ａ）に示すように、この加熱オーブン１１が下
降した時に、仮折りして注出口栓を取りつけ側面と底面
とを熱圧着して密封した液体用紙容器２０の熱圧着して
密封する部分２１，２１の近傍に位置するような構造に
なっている。Although not shown, the main body of the heating apparatus for a liquid paper container according to the present invention is provided with an outer cylinder body mounted so as to rise and fall through a support substrate, a hot air supply unit, a guide cylinder and an air cylinder. The heating oven 11 is attached to the lower part of the outer cylinder. Then, as shown in FIG. 3A, when the heating oven 11 descends, the liquid paper container 20 is temporarily folded and attached with a spout plug, and the side surface and the bottom surface are thermocompression-bonded and hermetically sealed. The structure is such that it is located in the vicinity of the portions 21 and 21 to be opened.
【００１３】本発明の加熱装置における加熱オーブン１
１は、図１の底面図に示すように、センターオーブン１
１Ａと両側にサイドオーブン１１Ｂ，１１Ｂの構造で、
液体用紙容器２０の密封する部分２１，２１が適宜の間
隔を保って位置できるようになっている。また、１２は
装置本体からの熱風供給口であり、小さい矢印は熱風吹
き出し用孔からの熱風の吹きつけ方向を示したものであ
る。すなわち、仮折りした液体用紙容器２０の熱圧着し
て密封する部分２１，２１の変形６面体の側面の形状に
合わせて、この密封する部分２１，２１の内面側の熱可
塑性樹脂層２６を溶かす、側面が変形６面体のセンター
オーブン１１Ａと、この密封する部分２１，２１の左右
の外面側の熱可塑性樹脂層２２を溶かす、側面が５面体
のサイドオーブン１１Ｂ，１１Ｂとから構成されてい
る。このセンターオーブン１１Ａの下部の、前記密封す
る部分２１，２１の内面側に臨む６面の全周と、サイド
オーブン１１Ｂ，１１Ｂの下部の、前記密封する部分２
１，２１の左右の外面側に臨む凸状の２面に、多数の熱
風吹き出し用孔を設けたもので、この孔から熱風を吹き
出すことにより密封する部分の熱可塑性樹脂層を溶かし
熱圧着して液体用紙容器を形成する。Heating oven 1 in the heating apparatus of the present invention
1 is a center oven 1 as shown in the bottom view of FIG.
1A and side ovens 11B and 11B on both sides,
The sealed portions 21 and 21 of the liquid paper container 20 can be positioned with appropriate intervals. Further, 12 is a hot air supply port from the main body of the apparatus, and a small arrow indicates the blowing direction of hot air from the hot air blowing hole. That is, the thermoplastic resin layer 26 on the inner surface side of the sealed parts 21 and 21 is melted in accordance with the shape of the side surface of the deformed hexahedron of the parts 21 and 21 to be sealed by thermocompression bonding of the temporarily folded liquid paper container 20. The center oven 11A has a modified hexahedron side surface, and the side ovens 11B and 11B have a pentahedron side surface that melts the thermoplastic resin layers 22 on the left and right outer surfaces of the sealing portions 21 and 21. All the six sides of the lower portion of the center oven 11A facing the inner surfaces of the sealing portions 21 and 21, and the sealing portion 2 of the lower portions of the side ovens 11B and 11B.
A large number of hot air blowing holes are provided on the two convex surfaces facing the left and right outer surface sides of 1, 21. By blowing hot air from these holes, the thermoplastic resin layer in the sealed portion is melted and thermocompression bonded. To form a liquid paper container.
【００１４】本発明は前述した加熱オーブン１１のセン
ターオーブン１１Ａに、従来に比べ多数の熱風吹き出し
用孔を設けたもので、図２（ａ），（ｂ）は、（図１の
センターオーブンのＴ−Ｔ側面からみた一例を示す）実
施例における熱風吹き出し用孔ｂ，ｂ…の配列を示した
ものである。すなわち、図２（ａ）は、加熱オーブン１
１におけるセンターオーブン１１Ａの上方り１段目の熱
風吹き出し用孔ｂ，ｂ…の貫設ピッチを、他段の貫設ピ
ッチの２分の１の間隔にして孔数を他段の２倍にしたも
のである。また、図２（ｂ）は、上方より２段目迄の熱
風吹き出し用孔ｂ，ｂ…の貫設ピッチを２分の１の間隔
にして孔数を増やしたものである。また、図示はしない
が、この増やした１段目又は２段目迄の孔の径を、他段
の孔の径より大きくすることも可能であり、密封する部
分に該当する部分の熱風量が増加して熱可塑性樹脂層を
速く溶かすことができる。In the present invention, a large number of hot air blowing holes are provided in the center oven 11A of the above-mentioned heating oven 11 as compared with the conventional ones, and FIGS. 2 (a) and 2 (b) are as shown in FIG. It shows the arrangement of the hot air blowing holes b, b ... In the example). That is, FIG. 2A shows a heating oven 1.
The pitch of the hot air blowing holes b, b ... in the first stage above the center oven 11A in No. 1 is set to be half the pitch of the pitches of the other stages to double the number of holes. It was done. Further, FIG. 2 (b) shows that the number of holes is increased by making the pitch of the hot air blowing holes b, b ... Although not shown, it is also possible to make the increased diameter of the holes up to the first step or the second step larger than the diameter of the holes of the other steps, and the hot air flow rate of the part corresponding to the sealed part is increased. The thermoplastic resin layer can be increased and melted quickly.
【００１５】次に、本発明の液体用紙容器の加熱装置を
用いて、表面側から熱可塑性樹脂層であるポリエチレン
層（３０μｍ）と紙材料層（３１０ｇ／ｍ2 ）とポリエ
チレン層（２５μｍ）とポリエステルフィルム（１２μ
ｍ）とアルミニウム箔（９μｍ）とポリエステルフィル
ム（１２μｍ）と熱可塑性樹脂層であるポリエチレン層
（６０μｍ）とを、切妻屋根形の液体用紙容器（２０）
の熱圧着して密封する部分２１，２１に前述した熱風吹
き出し用孔ｂ，ｂ…から、３６０℃で８０ｍｍＡｑの熱
風を１秒間吹きつけて、内面側の熱可塑性樹脂層を溶か
したところ、この樹脂層はほぼ均一に熱溶融し、熱溶融
不良箇所やピンホールが発生せず、また、発泡もごく僅
かの発生に抑えることができ、さらに密封する部分以外
には発泡は認められなかった。従って、液体用紙容器は
熱圧着不良による液漏れなどが起こらなかった。Next, using the heating apparatus for the liquid paper container of the present invention, a polyethylene layer (30 μm) which is a thermoplastic resin layer, a paper material layer (310 g / m 2 ), and a polyethylene layer (25 μm) from the front surface side. Polyester film (12μ
g), an aluminum foil (9 μm), a polyester film (12 μm) and a polyethylene layer (60 μm) which is a thermoplastic resin layer, and a gable roof type liquid paper container (20)
When hot air of 80 mmAq at 360 ° C. is blown for 1 second from the above-mentioned hot air blowing holes b, b ... to the parts 21 and 21 to be sealed by thermocompression bonding to melt the thermoplastic resin layer on the inner surface side. The resin layer was heat-melted almost uniformly, no defective heat-melting points or pinholes were generated, foaming could be suppressed to a very small amount, and no foaming was observed except in the sealed portion. Therefore, the liquid paper container did not leak due to poor thermocompression bonding.
【００１６】[0016]
【発明の効果】本発明は、加熱オーブンのセンターオー
ブンの全周に貫設された熱風吹き出し用孔を、オーブン
上方より１段目又は２段目迄の孔数を他段の孔数より多
くすることで、熱風が必要とする紙容器の密封する部分
に集中的に吹きつけられ、かつ全体的に熱がかかるの
で、この部分が先に加熱され、内面の熱可塑性樹脂層が
十分に溶かされるので、熱溶融不良やピンホールが発生
しない。また、この部分の発泡が先に始まり、密封する
部分の上端面に空気や蒸気の逃げ道ができるので、下方
の膨張した空気や蒸気も上端面から放出されるので、発
泡を小さく抑えることができると共に、密封する部分以
外には発泡が発生しない。According to the present invention, the number of holes for hot air blown through the entire circumference of the center oven of the heating oven is larger than the number of holes of the first stage or the second stage from above the oven as compared with the number of holes of other stages. By doing so, the hot air is blown intensively to the required sealing part of the paper container, and the entire part receives heat, so this part is heated first, and the thermoplastic resin layer on the inner surface is sufficiently melted. As a result, defective heat melting and pinholes do not occur. Further, since the foaming of this portion starts first and an escape path for air and steam is formed on the upper end surface of the sealing portion, the expanded air and steam below is also released from the upper end surface, so foaming can be suppressed to a small level. At the same time, foaming does not occur except in the sealed portion.
【図１】本発明の実施例における、液体用紙容器の加熱
装置に於ける加熱オーブンの底面図である。FIG. 1 is a bottom view of a heating oven in a liquid paper container heating device according to an embodiment of the present invention.
【図２】本発明の実施例における、加熱オーブンのセン
ターオーブンに設けた熱風吹き出し用孔の配置図であ
り、（ａ）は、１段目の貫設ピッチを他段の貫設ピッチ
の半分にした配置説明図であり、（ｂ）は、２段目迄の
貫設ピッチを他段の貫設ピッチの半分にした配置説明図
である。FIG. 2 is a layout view of hot air blowing holes provided in the center oven of the heating oven in the embodiment of the present invention, FIG. 2 (a) is a half pitch of the penetration pitch of the first stage and half of the penetration pitch of the other stage. FIG. 4B is an arrangement explanatory diagram in which the penetrating pitch up to the second stage is half the penetrating pitch of the other stage.
【図３】本発明に係る加熱装置の概略を示すもので、
（ａ）は、加熱装置の部分説明図であり、（ｂ）は、加
熱オーブンを側面から見た説明図で、（ｃ）は、加熱オ
ーブンのセンターオーブンに設けられた熱風吹き出し用
孔を側面から見た説明図である。FIG. 3 schematically shows a heating device according to the present invention,
(A) is a partial explanatory view of the heating device, (b) is an explanatory view of the heating oven as viewed from the side, and (c) is a side view of a hot air blowing hole provided in the center oven of the heating oven. It is explanatory drawing seen from.
【図４】従来の液体用紙容器の加熱装置における、熱風
を吹きつけられた表面の熱可塑性樹脂層の状態を示す部
分断面図である。FIG. 4 is a partial cross-sectional view showing a state of a thermoplastic resin layer on a surface blown with hot air in a conventional heating device for liquid paper containers.
１０…加熱装置本体 １１…加熱オーブン １１Ａ…センターオーブン １１Ｂ…サイドオーブン １２…熱風供給口 １５…コーナー部 ２０…液体用紙容器 ２１…密封する部分 ２２…熱可塑性樹脂層 ２３…紙材料層 ２４…バリアー層 ２５…ポリエチレンフィルム層 ２６…熱可塑性樹脂層 ２７…注出口栓 ３１…発泡（膨らみ） ３２…ピンホール ３３…熱溶融不良箇所 ｂ …熱風吹き出し用孔 10 ... Heating device main body 11 ... Heating oven 11A ... Center oven 11B ... Side oven 12 ... Hot air supply port 15 ... Corner portion 20 ... Liquid paper container 21 ... Sealing portion 22 ... Thermoplastic resin layer 23 ... Paper material layer 24 ... Barrier Layer 25 ... Polyethylene film layer 26 ... Thermoplastic resin layer 27 ... Pouring spout 31 ... Foaming (bulging) 32 ... Pinhole 33 ... Poor hot-melting point b ... Hole for blowing hot air
Claims (3)
料製からなる、切妻屋根形などの液体用紙容器の仮折り
された頂部や底部などを熱圧着して密封する部分に、熱
風を吹き付けて表面の熱可塑性樹脂層を溶かす加熱装置
の、前記熱可塑性樹脂層を溶かす頂部や底部に臨ませて
配置され、液体用紙容器の内外面に熱風を吹き付けるセ
ンターオーブンとサイドオーブンからなる加熱オーブン
と、前記加熱オーブンのセンターオーブン全周に、複数
段にわたりそれぞれ異なる位置に多数の貫設された熱風
吹き出し用孔とを設けた液体用紙容器の加熱装置におい
て、前記センターオーブンの上部より１段目又は２段目
迄の熱風吹き出し用孔が、他段の孔数より多く設けられ
ているこを特徴とする液体用紙容器の加熱装置。1. A hot air blow is applied to a portion of a liquid paper container, such as a gable roof, which is made of a paper laminated material having a thermoplastic resin layer laminated on the surface thereof, and which is thermocompression-bonded to the top and bottom portions of the liquid paper container. A heating oven consisting of a center oven and a side oven, which are arranged so as to face the top and bottom of the heating device that melts the thermoplastic resin layer of the surface by spraying and blows hot air to the inner and outer surfaces of the liquid paper container. And a heating device for a liquid paper container provided with a number of hot air blowing holes penetrating at different positions over a plurality of stages around the center oven of the heating oven, the first stage from the upper part of the center oven. Alternatively, the heating device for a liquid paper container is characterized in that the hot air blowing holes up to the second stage are provided in a larger number than the holes in the other stages.
は２段目迄に貫設された熱風吹き出し用孔の貫設ピッチ
が、他段の貫設ピッチの２分の１にしたことを特徴とす
る請求項１に記載の液体用紙容器の加熱装置。2. The penetration pitch of the hot air blowing holes penetrating from the upper part of the center oven to the first or second step is one half of the penetrating pitch of the other steps. The heating device for a liquid paper container according to claim 1.
は２段目迄の熱風吹き出し用孔の径が、他段の孔径より
大きくしたことを特徴とする請求項１又は請求項２に記
載の液体用紙容器の加熱装置。3. The hot air blowing hole from the upper part of the center oven to the first or second stage is larger in diameter than the holes in the other stages. Liquid paper container heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08036564A JP3134759B2 (en) | 1996-02-23 | 1996-02-23 | Liquid paper container heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08036564A JP3134759B2 (en) | 1996-02-23 | 1996-02-23 | Liquid paper container heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09226725A true JPH09226725A (en) | 1997-09-02 |
| JP3134759B2 JP3134759B2 (en) | 2001-02-13 |
Family
ID=12473264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08036564A Expired - Fee Related JP3134759B2 (en) | 1996-02-23 | 1996-02-23 | Liquid paper container heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3134759B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0938965A3 (en) * | 1998-02-25 | 2000-03-01 | Shikoku Kakoki Co., Ltd. | Heating device for heat-sealing bottom portions of containers |
| WO2015024199A1 (en) * | 2013-08-20 | 2015-02-26 | Chang Ching-Wen | Paper container foaming apparatus |
| CN104416709A (en) * | 2013-08-20 | 2015-03-18 | 张静文 | Paper container foaming apparatus |
-
1996
- 1996-02-23 JP JP08036564A patent/JP3134759B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0938965A3 (en) * | 1998-02-25 | 2000-03-01 | Shikoku Kakoki Co., Ltd. | Heating device for heat-sealing bottom portions of containers |
| US6149566A (en) * | 1998-02-25 | 2000-11-21 | Shikoku Kakoki Co., Ltd | Heating device for heat-sealing bottom portions of containers |
| WO2015024199A1 (en) * | 2013-08-20 | 2015-02-26 | Chang Ching-Wen | Paper container foaming apparatus |
| CN104416709A (en) * | 2013-08-20 | 2015-03-18 | 张静文 | Paper container foaming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3134759B2 (en) | 2001-02-13 |
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