JPH1053204A - Heating device and heating and sealing method using the device - Google Patents

Heating device and heating and sealing method using the device

Info

Publication number
JPH1053204A
JPH1053204A JP8206071A JP20607196A JPH1053204A JP H1053204 A JPH1053204 A JP H1053204A JP 8206071 A JP8206071 A JP 8206071A JP 20607196 A JP20607196 A JP 20607196A JP H1053204 A JPH1053204 A JP H1053204A
Authority
JP
Japan
Prior art keywords
heating
hot air
small hole
heating device
heating oven
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.)
Pending
Application number
JP8206071A
Other languages
Japanese (ja)
Inventor
Yuzo Inatani
祐三 稲谷
Yasuo Yamazaki
保雄 山崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Printing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP8206071A priority Critical patent/JPH1053204A/en
Publication of JPH1053204A publication Critical patent/JPH1053204A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72327—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/103—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined direct heating both surfaces to be joined
    • 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
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B29C66/43122—Closing the top of gable top containers
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7162—Boxes, cartons, cases
    • B29L2031/7166—Cartons of the fruit juice or milk type, i.e. containers of polygonal cross sections formed by folding blanks into a tubular body with end-closing or contents-supporting elements, e.g. gable type containers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Combustion & Propulsion (AREA)
  • Closing Of Containers (AREA)
  • Package Closures (AREA)

Abstract

PROBLEM TO BE SOLVED: To easily adjust the quantity of the hot air to a required value by providing slender small holes at the position to heat an inner surface side of corner parts of a cylindrical body and circular small holes in parts other than the corner parts in an inner surface heating oven of a heating device to be used in manufacturing a paper container on which a thermoplastic resin layer is laminated. SOLUTION: In manufacturing a liquid paper container 20 made of a paper laminated material, hot air is blown against a sealing part 25 of the temporarily folded liquid paper container 20 to heat and melt a thermoplastic resin layer. In a heating device for a top part of the liquid paper container 20, an inner surface heating oven 11 is provided with an opening part of the container 20 of the section analogous to the temporarily folded shape, and slender small holes 19 are provided in a corner part and circular small holes 18 are provided in a part other than the corner part. Hot air blown from the slender small holes 19 intensively heats a temporarily folded valley side of the sealing part 25, and hot air blown from the circular small holes 18 is evenly spread to uniformly heat the sealing part 25.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、ジュース，酒等の
飲料を充填するのに使用されている液体紙容器に用いる
加熱装置、およびこの加熱装置を用いた加熱密封方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating apparatus for a liquid paper container used for filling drinks such as juice and liquor, and a heating and sealing method using the heating apparatus.

【０００２】[0002]

【従来の技術】紙を基材とし、内外面に熱可塑性樹脂層
を設けた積層材料からなる筒状体の底部、頂部の密封
は、ホットエアを密封部分に吹きつけて、前記内外面の
熱可塑性樹脂層を溶融し、圧着することにより密封し、
液体紙容器としていた。この筒状体の密封に際し、図
２、図３、および図４に示すように、内面加熱オーブン
１１と外面加熱オーブン１２、１２とからなり、それぞ
れ側面にホットエアを吹き出すための円形の小孔１８を
多数配置したパターンからなり、液体紙容器の密封部分
にホットエアを吹きつけて、熱可塑性樹脂層を加熱溶融
し、圧着していた。2. Description of the Related Art The bottom and top of a cylindrical body made of a laminated material having paper as a base material and having a thermoplastic resin layer provided on the inner and outer surfaces are sealed by blowing hot air onto the sealed portion to heat the inner and outer surfaces. Melt the plastic resin layer and seal by pressing,
It was a liquid paper container. When sealing this cylindrical body, as shown in FIGS. 2, 3, and 4, the inner surface heating oven 11 and the outer surface heating ovens 12 and 12 each have a circular small hole 18 for blowing hot air to the side surface. Are arranged, and hot air is blown to the sealed portion of the liquid paper container to heat and melt the thermoplastic resin layer and press-bond it.

【０００３】この加熱装置に用いる加熱オーブン１０
は、図２、図３、および図４に示すように、密封する底
部や頂部を仮折りした状態と相似形をしており、仮折り
した密封部分を均一に加熱溶融するため、コーナー部１
１Ａから吹きつけるホットエアの量が他の部分から吹き
つける量よりも多くするため、図７に示すように、ホッ
トエアを吹き出す小孔１９の数を他の部分の小孔１８よ
り多くする手段がとられている。また、図８に示すよう
に、コーナー部１１Ａからの吹き出すホットエアの量を
多くするため、コーナー部の小孔１９の径を他の部分の
小孔１８の径より大きくする手段がとられている。[0003] A heating oven 10 used in this heating apparatus
As shown in FIGS. 2, 3 and 4, the shape is similar to the state where the bottom and top parts to be sealed are temporarily folded, and the corner part 1 is used for uniformly heating and melting the temporarily folded sealing part.
Since the amount of hot air blown from 1A is made larger than the amount blown from other parts, as shown in FIG. 7, means for making the number of small holes 19 for blowing hot air larger than the small holes 18 in other parts is required. Have been. As shown in FIG. 8, in order to increase the amount of hot air blown out from the corner 11A, a means for increasing the diameter of the small hole 19 in the corner portion to the diameter of the small hole 18 in the other portion is employed. .

【０００４】[0004]

【発明が解決しようとする課題】従来は、予め小孔を設
けた加熱オーブンを用いて、液体紙容器の仮折りされた
密封部分にホットエアを吹きつけ、密封部分のうち熱量
の不足している部分を見極め、加熱オーブンのその部分
に対応する位置に、新たにホットエアを吹き出す小孔を
設けたり、あるいは小孔の径を大きくすることにより、
密封部分が均一に加熱できるようにしていた。Conventionally, hot air has been blown onto a temporarily folded sealed portion of a liquid paper container using a heating oven provided with small holes in advance, and the amount of heat in the sealed portion is insufficient. By identifying the part and providing a new small hole to blow out hot air at the position corresponding to that part of the heating oven, or by increasing the diameter of the small hole,
The sealed part was designed to be uniformly heated.

【０００５】一方、仮折りした密封部分の加熱におい
て、加熱オーブンから距離の離れた折り込まれた部分に
は、集中してホットエアが当たるように、またその他加
熱オーブンから距離の近い部分では、集中せずに、均一
に広がりを持った状態で当たるようにするのが好まし
い。しかし、加熱オーブンに設ける小孔はいずれも円形
で、ホットエアの吹き出し量を部分的に増加させるため
に、前記の新たに小孔の数を増したり、小孔の径を大き
くする手段をとっていた。しかしながら、小孔の形状が
円形の同一形状であるため、ホットエアの広がりが同じ
ようになるため、密封のための最適な条件を設定がする
ため、繰り返し多くのテストをやらなければならなかっ
た。[0005] On the other hand, in the heating of the temporarily folded sealed portion, hot air is concentrated on the folded portion at a distance from the heating oven, and concentrated on other portions at a short distance from the heating oven. Instead, it is preferable to hit it in a state having a uniform spread. However, the small holes provided in the heating oven are all circular, and in order to partially increase the amount of hot air blown out, the above-mentioned means of newly increasing the number of small holes or increasing the diameter of the small holes is employed. Was. However, since the shape of the small holes is the same circular shape, the spread of hot air becomes the same, so that many tests have to be repeatedly performed in order to set the optimal conditions for sealing.

【０００６】本発明は、以上の点を鑑み、必要なホット
エアの量に調整が容易に行うことができる加熱装置、お
よびこの加熱装置を用いた密封方法を提供することを目
的とする。[0006] In view of the above, it is an object of the present invention to provide a heating device capable of easily adjusting a required amount of hot air, and a sealing method using the heating device.

【０００７】[0007]

【課題を解決するための手段】本発明は、内外面に熱可
塑性樹脂層を積層した紙積層材料製の筒状体の、予め仮
折りを行った底部または頂部の密封部分にホットエアを
吹き付けて、前記熱可塑性樹脂層を加熱溶融した後、圧
着して密封する紙容器の製造において使用する加熱装置
で、ホットエアを供給する加熱オーブンのうち内面を加
熱する内面加熱オーブンを、筒状体の底部および頂部の
仮折りされた隅部内面側を加熱する位置に、細長い形状
の小孔を設け、かつその他隅部以外の部分に円形の小孔
を配置したことを特徴とする加熱装置である。According to the present invention, hot air is blown onto a preliminarily folded bottom or top sealed portion of a tubular body made of a paper laminated material having a thermoplastic resin layer laminated on the inner and outer surfaces. After heating and melting the thermoplastic resin layer, the heating device used in the production of a paper container that is pressed and sealed, the inner surface heating oven for heating the inner surface of the heating oven that supplies hot air, the bottom of the cylindrical body, A heating device characterized in that an elongated small hole is provided at a position where the inner surface of the temporarily folded corner at the top is heated, and a circular small hole is arranged at a portion other than the corner.

【０００８】また、本発明は、前記加熱オーブンの形状
は、四角形状、または仮折りした開口部の形状と相似形
状のいずれかとした加熱装置とする。また、本発明は、
加熱オーブンのコーナー部の細長い小孔の形状として、
スリットが好ましく、このスリットの幅は、円形の小孔
の径より小さくした加熱装置が好ましい。さらに、本発
明は、前記内面加熱オーブンのスリットの下端が、該ス
リットの両側に設けた円形の小孔の最下端の孔と同じ位
置までとしたパターンとした加熱装置が好ましい。そし
て、本発明は、前記記載の加熱装置を用いて、筒状体の
底部または頂部の密封部分にホットエアを吹き付けた
後、圧着して密封することをと特徴とする加熱密封方法
である。Further, the present invention provides a heating device in which the shape of the heating oven is either a square shape or a shape similar to the shape of the temporarily folded opening. Also, the present invention
As the shape of the elongated small hole at the corner of the heating oven,
A slit is preferable, and a heating device in which the width of the slit is smaller than the diameter of the circular small hole is preferable. Further, in the present invention, it is preferable that the heating device has a pattern in which the lower end of the slit of the inner surface heating oven is arranged at the same position as the lowermost hole of the circular small hole provided on both sides of the slit. Then, the present invention is a heat sealing method characterized in that hot air is blown to a sealed portion at a bottom or a top of a cylindrical body using the heating device described above, and then compressed and sealed.

【０００９】[0009]

【作用】加熱装置に取り付けた加熱オーブンは、コーナ
ー部に設けた小孔は、細長い形状であるので、吹き出し
たホットエアの広がりが少なく、液体紙容器の密封部分
の仮折りされた隅部内面側を集中的に加熱することがで
き、また、その他の部分は、円形の小孔から吹き出した
ホットエアが平均的に広がり、密封部分を均一に加熱す
ることができる。In the heating oven attached to the heating device, the small holes provided at the corners are elongated, so that the blown-out hot air is less spread, and the inner side of the temporarily folded corner of the sealed portion of the liquid paper container is closed. Can be intensively heated, and in other portions, the hot air blown out from the circular small holes spreads on average, and the sealed portion can be heated uniformly.

【００１０】また、細長い小孔の形状を単一のスリット
することで、ホットエアの吹き出し量を設定し易いの
で、液体紙容器の密封部分の仮折りされた隅部内面側を
集中的に加熱することができる。従来のように対応する
加熱オーブンの位置に、新たな小孔を設けたり、あるい
は小孔の径を大きくする微妙な調整作業を必要としない
ので、所定の小孔のパターンを得る作業が、短時間で行
うことができる。In addition, since the amount of hot air blowout can be easily set by slitting the shape of the elongated small hole into a single slit, the inside of the temporarily folded corner of the sealed portion of the liquid paper container is heated intensively. be able to. Since it is not necessary to provide a new small hole at the position of the corresponding heating oven or to make a fine adjustment work to increase the diameter of the small hole as in the conventional case, the work of obtaining a predetermined small hole pattern is short. Can be done in time.

【００１１】[0011]

【発明の実施の形態】図１は、本発明の一実施例を示す
もので、液体紙容器の頂部の加熱装置の断面説明図であ
る。図中の一点鎖線は、加熱オーブン１０が下降した時
に近くに位置した液体紙容器２０の熱圧着して密封する
密封部分２５を示したものである。この加熱装置は、切
妻屋根形などの液体紙容器２０の製函、充填工程におい
て、注出口栓２６を取り付けた開口部２７を仮折りし、
側面を一旦内側に折り込み、２つの側面と、前後面と重
ね合わせ、熱圧着することにより密封していた。内容物
を充填し、開口部 を仮折りした液体紙容器２０を、図
１の前後方向に間欠的に搬送する。そして、搬送コンベ
ア（図示しない）の上方に位置させた支持基板３１と、
この支持基板３１に固定して取り付けた円筒状のホット
エア供給部３２と、このホットエア供給部３２に気密に
スライドし、ガイドシリンダー３３とエアシリンダー
（図示しない）とを介して、外側筒体３４を上下動可能
に取り付ける。そして、この外筒体３４の下部に、加熱
オーブン１０を、下降した時に液体紙容器２０の密封部
分２５の近くに位置するように取り付けた。FIG. 1 shows an embodiment of the present invention and is a cross-sectional explanatory view of a heating device at the top of a liquid paper container. The alternate long and short dash line in the figure shows the sealing portion 25 of the liquid paper container 20 which is located nearby when the heating oven 10 is lowered and which is sealed by thermocompression. This heating device tentatively folds the opening 27 to which the spout plug 26 is attached in the box making and filling process of the liquid paper container 20 having a gable roof shape,
The side surfaces were once folded inward, the two side surfaces were overlapped with the front and rear surfaces, and sealed by thermocompression bonding. The liquid paper container 20 filled with the contents and the opening is temporarily folded is intermittently transported in the front-rear direction in FIG. And a support substrate 31 positioned above a transport conveyor (not shown);
A cylindrical hot air supply unit 32 fixedly attached to the support substrate 31 and an air cylinder slides on the hot air supply unit 32 in an airtight manner, and the outer cylinder 34 is moved through a guide cylinder 33 and an air cylinder (not shown). Mount so that it can move up and down. The heating oven 10 was attached to the lower part of the outer cylinder 34 so as to be located near the sealed portion 25 of the liquid paper container 20 when it was lowered.

【００１２】一方、加熱オーブン１０は、図２、図３、
および図４に示す構成となっている。図２は、加熱オー
ブン１０の平面図であり、図３は、図２のＸ−Ｘ面の端
面図で、図４は、図２の内側加熱オーブン１１の側面図
である。この加熱装置は、内外面の熱可塑性樹脂層を積
層した紙積層材料からなる液体紙容器２０の製函、充填
工程において、仮折りした液体紙容器の密封部分２５
に、内外面からホットエアを吹き付けて、前記熱可塑性
樹脂層を加熱溶融する装置である。On the other hand, the heating oven 10 is shown in FIGS.
And the configuration shown in FIG. 2 is a plan view of the heating oven 10, FIG. 3 is an end view of the XX plane of FIG. 2, and FIG. 4 is a side view of the inner heating oven 11 of FIG. In the box making and filling process of the liquid paper container 20 made of the paper laminated material in which the thermoplastic resin layers on the inner and outer surfaces are laminated, the heating unit 25 seals the temporarily folded sealed portion 25 of the liquid paper container.
Hot air is blown from the inner and outer surfaces to heat and melt the thermoplastic resin layer.

【００１３】内面加熱オーブン１１は、容器の開口部を
仮折りした形状と相似形の断面形状をしており、かつ、
コーナー部１１Ａの小孔１９は、細長い形状で、コーナ
ー部以外の部分に設けた円形の小孔１８を設けた構造と
なっている。この内面加熱オーブン１１は、図５に示す
ように、まずコーナー部以外は、吹き出す小孔１８を円
形とし、所定のパターンに設けておき、また、コーナー
部はスリット状の細長い形状の小孔１９からなり、小孔
１９の幅は、前記円形の小孔１８の径より小さい構造が
好適である。また、細長い小孔１９を設ける位置は、下
端をその両側に設けた円形の小孔１８の最下端の位置ま
で延ばしておくことが、良好なシール状態とするのに適
している。The inner surface heating oven 11 has a sectional shape similar to a shape obtained by temporarily folding the opening of the container, and
The small hole 19 in the corner portion 11A has an elongated shape, and has a structure in which a circular small hole 18 provided in a portion other than the corner portion is provided. As shown in FIG. 5, the inner surface heating oven 11 has a small hole 18 to be blown out in a predetermined pattern, except for the corner portion, and a slit-like small hole 19 in the corner portion. Preferably, the width of the small hole 19 is smaller than the diameter of the circular small hole 18. Further, it is suitable for providing a good sealing state that the position where the elongated small hole 19 is provided extends the lower end to the position of the lowermost end of the circular small hole 18 provided on both sides thereof.

【００１４】ここで、内面加熱オーブン１１は、図２の
ように、開口部を仮折りした形状と相似形の以外、図６
に示すように、四角形で、同様に、コーナー部１１Ａの
小孔１９は、細長い形状で、コーナー部以外の部分に設
けた円形の小孔１８を設けた構造としてもよい。Here, as shown in FIG. 2, the inner surface heating oven 11 has a shape similar to the shape obtained by temporarily folding the opening as shown in FIG.
As shown in the figure, the small hole 19 of the corner portion 11A may have a long and narrow shape and a circular small hole 18 provided in a portion other than the corner portion.

【００１５】[0015]

【発明の効果】本発明は、以上の構成からなるので加熱
装置に取り付けた加熱オーブンは、コーナー部に設けた
小孔は、細長い形状であるので、吹き出したホットエア
の広がりが少なく、液体紙容器の密封部分の仮折りされ
た谷側を集中的に加熱することができ、また、その他の
部分は、円形の小孔から吹き出したホットエアが平均的
に広がり、密封部分を均一に加熱することができ、安定
したシール状態を得ることがてきる。According to the present invention having the above construction, the heating oven attached to the heating device has a small hole formed in the corner portion having an elongated shape. The tentatively folded valley side of the sealed part can be heated intensively, and the other part can be evenly heated with the hot air blown out from the circular small holes, and evenly heated the sealed part And a stable sealing state can be obtained.

【００１６】また、細長い小孔の形状を単一のスリット
することで、ホットエアの吹き出し量を設定し易いの
で、液体紙容器の密封部分の仮折りされた谷側を集中的
に加熱することができ、従来のように対応する加熱オー
ブンの位置に、新たな小孔を設けたり、あるいは小孔の
径を大きくする微妙な調整作業を軽減できる。Further, since a single slit is formed in the shape of the elongated small hole, the amount of hot air to be blown out can be easily set, so that the temporarily folded valley side of the sealed portion of the liquid paper container can be concentratedly heated. As a result, it is possible to reduce the delicate adjustment work of providing a new small hole at the position of the corresponding heating oven or increasing the diameter of the small hole as in the related art.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の一実施例の要部を示す断面説明図であ
る。FIG. 1 is an explanatory sectional view showing a main part of an embodiment of the present invention.

【図２】図１の加熱オーブンの平面図である。FIG. 2 is a plan view of the heating oven of FIG. 1;

【図３】図２のＸ−Ｘの断面構造を示す端面図である。FIG. 3 is an end view showing a cross-sectional structure taken along line XX of FIG. 2;

【図４】図２の内面加熱オーブンの小孔の状態を示す側
面図である。FIG. 4 is a side view showing a state of a small hole of the inner surface heating oven of FIG. 2;

【図５】本発明に用いる内面加熱オーブンの小孔のパタ
ーンを示す説明図である。FIG. 5 is an explanatory view showing a pattern of small holes of an inner surface heating oven used in the present invention.

【図６】本発明の他の加熱オーブン構造を示す平面図で
ある。FIG. 6 is a plan view showing another heating oven structure of the present invention.

【図７】従来の内面加熱オーブンのコーナー部の小孔の
一例を示す説明図である。FIG. 7 is an explanatory view showing an example of a small hole at a corner of a conventional inner surface heating oven.

【図８】従来の内面加熱オーブンのコーナー部の小孔の
他の例を示す説明図である。FIG. 8 is an explanatory view showing another example of a small hole at a corner of a conventional inner surface heating oven.

【符号の説明】[Explanation of symbols]

１０…加熱オーブン １１…内面加熱オーブン １１Ａ…コーナー部 １８…円形の小孔 １９…細長い小孔 ２０…液体紙容器 ２５…密封部分 DESCRIPTION OF SYMBOLS 10 ... Heating oven 11 ... Inner surface heating oven 11A ... Corner part 18 ... Circular small hole 19 ... Elongated small hole 20 ... Liquid paper container 25 ... Sealed part

Claims (7)

【特許請求の範囲】[Claims] 【請求項１】内外面に熱可塑性樹脂層を積層した紙積層
材料製の筒状体の、予め仮折りを行った底部または頂部
の密封部分にホットエアを吹き付けて、前記熱可塑性樹
脂層を加熱溶融した後、圧着して密封する紙容器の製造
において使用する加熱装置で、ホットエアを供給する加
熱オーブンのうち内面を加熱する内面加熱オーブンを、
筒状体の底部および頂部の隅部内面側を加熱する位置
に、細長い形状の小孔を設け、かつその他隅部以外の部
分に円形の小孔を配置したことを特徴とする加熱装置。1. A hot air is blown on a sealed portion at a bottom or top portion of a tubular body made of a paper laminated material having a thermoplastic resin layer laminated on an inner and outer surface thereof, which has been preliminarily folded, thereby heating the thermoplastic resin layer. After melting, the heating device used in the production of paper containers that are pressed and sealed, the inner surface heating oven that heats the inner surface of the heating oven that supplies hot air,
A heating device characterized in that an elongated small hole is provided at a position for heating the inner surface of the bottom and top corners of the cylindrical body, and a circular small hole is arranged at a portion other than the corner. 【請求項２】内面加熱オーブンの形状が、四角形状であ
る請求項１に記載の加熱装置。2. The heating device according to claim 1, wherein the shape of the inner surface heating oven is quadrangular. 【請求項３】内面加熱オーブンの形状が、仮折りした開
口部の形状と相似形状である請求項１に記載の加熱装
置。3. The heating device according to claim 1, wherein the shape of the inner surface heating oven is similar to the shape of the temporarily folded opening. 【請求項４】内面加熱オーブンの細長い小孔がスリット
である請求項１ないし請求項３のいずれかにに記載の加
熱装置。4. The heating device according to claim 1, wherein the elongated holes of the inner surface heating oven are slits. 【請求項５】内面加熱オーブンのスリットの幅が、円形
の小孔の径より小さい構造とした請求項４に記載の加熱
装置。5. The heating device according to claim 4, wherein the width of the slit of the inner surface heating oven is smaller than the diameter of the circular small hole. 【請求項６】内面加熱オーブンのスリットの下端が、該
スリットの両側に設けた円形の小孔の最下端の孔と同じ
位置までとしたパターンである請求項５に記載の加熱装
置。6. The heating apparatus according to claim 5, wherein the lower end of the slit of the inner surface heating oven has a pattern in which the lower end of the circular small hole provided on both sides of the slit is located at the same position as the lowermost hole. 【請求項７】請求項１ないし請求項６のいずれかに記載
された加熱装置を用いて、筒状体の底部または頂部の密
封部分にホットエアを吹き付けた後、圧着して密封する
ことをと特徴とする加熱密封方法。7. Using a heating device according to any one of claims 1 to 6, hot air is blown onto a sealed portion at the bottom or top of the cylindrical body, and then the cylindrical body is press-sealed and sealed. Characteristic heat sealing method.
JP8206071A 1996-08-05 1996-08-05 Heating device and heating and sealing method using the device Pending JPH1053204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8206071A JPH1053204A (en) 1996-08-05 1996-08-05 Heating device and heating and sealing method using the device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8206071A JPH1053204A (en) 1996-08-05 1996-08-05 Heating device and heating and sealing method using the device

Publications (1)

Publication Number Publication Date
JPH1053204A true JPH1053204A (en) 1998-02-24

Family

ID=16517355

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8206071A Pending JPH1053204A (en) 1996-08-05 1996-08-05 Heating device and heating and sealing method using the device

Country Status (1)

Country Link
JP (1) JPH1053204A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

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