JP2001354211A - Sealing method of mouth of plastic container, and apparatus thereof - Google Patents

Sealing method of mouth of plastic container, and apparatus thereof

Info

Publication number
JP2001354211A
JP2001354211A JP2000176665A JP2000176665A JP2001354211A JP 2001354211 A JP2001354211 A JP 2001354211A JP 2000176665 A JP2000176665 A JP 2000176665A JP 2000176665 A JP2000176665 A JP 2000176665A JP 2001354211 A JP2001354211 A JP 2001354211A
Authority
JP
Japan
Prior art keywords
mouth
sealing
plastic container
frequency heating
plastic
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
Application number
JP2000176665A
Other languages
Japanese (ja)
Other versions
JP4479061B2 (en
Inventor
Tomokazu Kobayashi
智一 小林
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.)
Toyo Seikan Group Holdings Ltd
Original Assignee
Toyo Seikan Kaisha 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 Toyo Seikan Kaisha Ltd filed Critical Toyo Seikan Kaisha Ltd
Priority to JP2000176665A priority Critical patent/JP4479061B2/en
Publication of JP2001354211A publication Critical patent/JP2001354211A/en
Application granted granted Critical
Publication of JP4479061B2 publication Critical patent/JP4479061B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B29C66/72321—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 metals or their alloys
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3644—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a ribbon, band or strip
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3668—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special induction coils
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • 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
    • 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
    • B29C66/114—Single butt 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
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24225—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being elliptical
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8227—Transmission mechanisms using springs
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B29C66/8432—Machines for making separate joints at the same time mounted in parallel or in series
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • 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
    • B29C66/841—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions
    • B29C66/8414—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions of different diameter

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Closing Of Containers (AREA)
  • Closures For Containers (AREA)
  • Package Closures (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a sealing method of a mouth of a plastic container in which even a mouth of different aspect ratio such as an elliptical shape and a rectangular shape can be sealed by uniformly heat-bonding a seal member, and an apparatus thereof. SOLUTION: A plastic material is coated on at least a seal surface of the metal seal member 3, the seal surface is pressed against the mouth 2 of different aspect ratio, and heat-bonded by arranging high frequency induction heating coils 11 and 12 on both ends of the longer side of the length a and the width b, whichever is the greater, of the mouth 2. Both ends of the shorter side b of the mouth 2 is prevented from being overheated and the total periphery can be heated at the uniform temperature to implement the complete sealing by arranging the high frequency induction heating coils 11 and 12 on both ends of the longer side a of the length a and the width b of the mouth 2 without surrounding a periphery of the mouth 2 of the different aspect ratio and heating the heating coils.

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】この発明は、プラスチック容
器の口部封止方法およびその装置に関し、楕円形や矩形
など縦・横比の異なる非円形の口部形状であってもアル
ミフィルムなどのシール材を加熱溶着できるようにした
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for sealing a mouth of a plastic container, and more particularly to a method of sealing an aluminum film or the like even if the mouth has a non-circular shape having a different aspect ratio such as an ellipse or a rectangle. The material can be heated and welded.

【０００２】[0002]

【従来の技術】プラスチック容器の口部をキャップで覆
うだけでなくシール材で封止しなければならない場合も
多く、マヨネーズやわさび等の食品を入れるプラスチッ
ク容器では、内容物の酸化や雑菌等の侵入を防止するた
め容器本体をガスバリア層を備えた多層構造とするとと
もに、口部にアルミフィルムを溶着して封止するように
している。2. Description of the Related Art In many cases, it is necessary not only to cover the mouth of a plastic container with a cap but also to seal it with a sealing material. In a plastic container containing food such as mayonnaise and wasabi, the contents may be oxidized and germs may be removed. In order to prevent intrusion, the container body has a multi-layer structure having a gas barrier layer, and an aluminum film is welded to the mouth to seal.

【０００３】このようなプラスチック容器の口部は、そ
の形状（横断面形状）が円形とされ、マヨネーズのプラ
スチック容器のように口部が大きい場合等には、絞り口
を形成したプラスチックの口板を介してプラスチックコ
ーティングされたアルミフィルムを当て、わさびのプラ
スチック容器のように口部が比較的小さい場合などに
は、プラスチックコーティングされたアルミフィルムだ
けを当て、口部外周を囲むように配置した同心円状の高
周波加熱コイルに高周波電流を流し、アルミフィルムを
誘導電流で加熱溶着して封止するようにしている。The mouth of such a plastic container has a circular shape (cross-sectional shape), and when the mouth is large like a mayonnaise plastic container, for example, a plastic mouth plate having a squeeze port formed therein. In the case where the mouth is relatively small, such as a wasabi plastic container, only the plastic-coated aluminum film is applied, and concentric circles are arranged so as to surround the mouth periphery. A high-frequency current is passed through the high-frequency heating coil, and the aluminum film is heated and welded with the induced current to seal.

【０００４】一方、プラスチック容器に対する要求の多
様化より、例えばわさび等をプラスチック容器から押出
した場合に、円形断面では、皿の上や他の食品の上で転
がり易く、楕円形の口部にしたいという要求がある。On the other hand, due to the diversification of requirements for plastic containers, for example, when wasabi or the like is extruded from a plastic container, it is easy to roll on a plate or other foods in a circular cross section, and it is desired to form an elliptical mouth. There is a request that.

【０００５】また、プラスチック容器から内容物を押出
した後、キャップを取り付けるまでに口部から空気を吸
い込んでしまうサックバックが起こる場合もあり、内容
物の酸化を防止するためには口部形状をサックバックが
起こり難い形状にする必要もあり、楕円形などの非円形
の縦・横比の異なる口部にしたいという要求がある。[0005] In addition, after the contents are extruded from the plastic container, suck-back may occur in which air is sucked from the mouth until the cap is attached. In order to prevent oxidation of the contents, the shape of the mouth is required. There is also a need to make the shape such that suck-back is unlikely to occur, and there is a demand for a non-circular orifice having a different aspect ratio from aspect ratio.

【０００６】[0006]

【発明が解決しようとする課題】ところが、このような
要求からプラスチック容器の口部の形状を楕円形などの
非円形の縦・横比の異なる形状にしようとすると、図５
に示すように、プラスチック容器１の口部２の形状に合
わせて非円形の縦・横比の異なるアルミフィルム３を用
意して当て、円形のアルミフィルムの場合と同様に、口
部２の外周を囲むように配置した同心円状の高周波加熱
コイル４に高周波発振機５から高周波電流を供給して流
し、アルミフィルム３を誘導電流で加熱溶着して封止し
ようとしても、均一に接着できないという問題がある。However, if the shape of the mouth of the plastic container is changed to a non-circular shape such as an elliptical shape having a different aspect ratio from that of the plastic container due to such a demand, FIG.
As shown in the figure, a non-circular aluminum film 3 having a different aspect ratio is prepared and applied according to the shape of the mouth portion 2 of the plastic container 1, and the outer periphery of the mouth portion 2 is formed in the same manner as in the case of the circular aluminum film. The problem is that even if a high-frequency current is supplied from a high-frequency oscillator 5 to a concentric high-frequency heating coil 4 arranged so as to surround the aluminum film 3 and the aluminum film 3 is heated and welded with an induced current to seal the aluminum film 3, uniform bonding cannot be achieved. There is.

【０００７】そこで、プラスチック容器の口部の外形状
に合わせて、例えば楕円形状の高周波加熱コイルで口部
外周を囲むようにし、この高周波加熱コイルに高周波電
流を流し、アルミフィルムを誘導電流で加熱溶着して封
止しようとしても加熱むらが生じ、均一に加熱溶着して
封止することができないという問題がある。Therefore, the outer periphery of the mouth is surrounded by, for example, an elliptical high-frequency heating coil in accordance with the outer shape of the mouth of the plastic container, and a high-frequency current is supplied to the high-frequency heating coil to heat the aluminum film with an induction current. There is a problem in that even if an attempt is made to seal by welding, uneven heating occurs, and it is not possible to heat and weld uniformly to seal.

【０００８】この発明は、かかる従来技術の有する課題
を解決するためになされたもので、楕円形や矩形など縦
・横比の異なる非円形などの口部に対しても均一にシー
ル材を加熱溶着して封止することができるプラスチック
容器の口部封止方法およびその装置を提供しようとする
ものである。The present invention has been made in order to solve the problems of the prior art, and heats a sealing material uniformly even in non-circular mouths having different aspect ratios such as elliptical and rectangular shapes. An object of the present invention is to provide a method and an apparatus for sealing the mouth of a plastic container which can be sealed by welding.

【０００９】[0009]

【課題を解決するための手段】上記従来技術が有する課
題を解決するためこの発明の請求項１記載のプラスチッ
ク容器の口部封止方法は、プラスチック容器の縦・横比
の異なる口部をシール材で封止するに際し、前記シール
材の前記口部対向面側には、前記口部と溶着可能なプラ
スチック樹脂を配し、当該口部の縦・横の長さの長い方
の両端側に高周波加熱コイルを配置して加熱溶着するよ
うにしたことを特徴とするものである。ここで、シール
材の前記口部対向面側に配されるプラスチック樹脂は、
シール材にコーティングすることで配されたり、プラス
チックフィルムやプラスチック板等の別体として配する
場合のいずれをも含むものである。In order to solve the problems of the prior art, a method of sealing the mouth of a plastic container according to the first aspect of the present invention is to seal the mouths of the plastic container having different aspect ratios. At the time of sealing with a material, a plastic resin that can be welded to the mouth is disposed on the mouth facing surface side of the sealing material, and at both ends of the mouth having a longer vertical and horizontal length. A high-frequency heating coil is arranged for heat welding. Here, the plastic resin disposed on the side of the mouth facing the sealing material,
This includes any case where the sealant is provided by coating the sealant, or where the sealant is provided as a separate body such as a plastic film or a plastic plate.

【００１０】このプラスチック容器の口部封止方法によ
れば、シール材の前記口部対向面側には、前記口部と溶
着可能なプラスチック樹脂を配し、当該口部の縦・横の
長さの長い方の両端側に高周波加熱コイルを配置して加
熱溶着するようにしており、縦・横比の異なる口部の周
囲を囲むことなく、口部の縦・横の長さの長い方の両端
側に高周波加熱コイルを配置して加熱することで、口部
の長さの短い方の両端側が過加熱されずに全周にわたり
均一な温度で加熱することができ、完全に封止すること
ができるようになる。According to this method of sealing the mouth of a plastic container, a plastic resin that can be welded to the mouth is disposed on the side of the sealing member facing the mouth, and the length of the mouth is long and short. High-frequency heating coils are placed on both ends of the longer side for heat welding, so that the longer and shorter sides of the mouth do not surround the mouth with different aspect ratios. By arranging high-frequency heating coils at both ends and heating, it is possible to heat at a uniform temperature over the entire circumference without overheating the shorter end of the mouth, and complete sealing Will be able to do it.

【００１１】また、この発明の請求項２記載のプラスチ
ック容器の口部封止方法は、請求項１記載の構成に加
え、前記縦・横比の異なる口部を楕円形または矩形と
し、前記高周波加熱コイルで楕円または矩形の長径また
は長軸方向両端側から加熱溶着するようにしたことを特
徴とするものである。According to a second aspect of the present invention, there is provided a method of sealing a mouth of a plastic container according to the first aspect, wherein the mouth having a different aspect ratio is formed into an elliptical shape or a rectangular shape. The elliptical or rectangular shape is heated and welded from both ends in the major axis direction or the major axis direction by a heating coil.

【００１２】このプラスチック容器の口部封止方法によ
れば、前記縦・横比の異なる口部を楕円形または矩形と
し、前記高周波加熱コイルで楕円の長径方向両端側また
は矩形の長軸方向両端側から加熱溶着するようにしてお
り、楕円形や矩形の口部の場合にも均一な温度で加熱し
て金属シール材を溶着して封止できるようになる。According to this method for sealing the mouth of a plastic container, the mouths having different aspect ratios are made elliptical or rectangular, and the high-frequency heating coil is used to form both ends of the ellipse in the major axis direction or both ends of the rectangle in the major axis direction. Heat welding is performed from the side, and even in the case of an elliptical or rectangular mouth, the metal sealing material can be welded and sealed by heating at a uniform temperature.

【００１３】さらに、この発明の請求項３記載のプラス
チック容器の口部封止方法は、請求項１または２記載の
構成に加え、前記シール材を、アルミフィルムを基材と
して構成したことを特徴とするものである。[0013] Further, a method for sealing the mouth of a plastic container according to a third aspect of the present invention is characterized in that, in addition to the configuration according to the first or second aspect, the sealing material is formed using an aluminum film as a base material. It is assumed that.

【００１４】このプラスチック容器の口部封止方法によ
れば、前記シール材をアルミフィルムを基材として構成
するようにしており、アルミフィルムを基材として用い
る場合にも均一な温度で加熱して封止することができる
ようになる。According to this method for sealing the mouth of a plastic container, the sealing material is made of an aluminum film as a base material. Even when an aluminum film is used as a base material, the sealing material is heated at a uniform temperature. It becomes possible to seal.

【００１５】また、この発明の請求項４記載のプラスチ
ック容器の口部封止装置は、プラスチック容器の縦・横
比の異なる口部を、シール材の前記口部対向面側に当該
口部と溶着可能なプラスチック樹脂を配して当該シール
材を加熱溶着して封止する装置であって、当該口部の縦
・横の長さの長い方の両端側に高周波加熱コイルを配置
したことを特徴とするものである。According to a fourth aspect of the present invention, there is provided an apparatus for sealing a mouth of a plastic container, wherein the mouth of the plastic container having a different aspect ratio is provided on the side of the sealing material facing the mouth. An apparatus for arranging a weldable plastic resin and heat-sealing the sealing material to seal the sealing material, wherein high-frequency heating coils are arranged at both ends of the mouth having a longer vertical and horizontal length. It is a feature.

【００１６】このプラスチック容器の口部封止装置によ
れば、縦・横比の異なる口部の縦・横の長さの長い方の
両端側に高周波加熱コイルを配置するようにしており、
縦・横比の異なる口部の周囲を囲むことなく、口部の縦
・横の長さの長い方の両端側に配置した高周波加熱コイ
ルで加熱することで、口部の縦・横の長さの長い方の両
端側を十分に加熱できるとともに、口部の長さの短い方
の両端側が過加熱されず、口部の全周を均一な温度で加
熱して完全に封止することができるようになる。According to the apparatus for sealing the mouth of a plastic container, the high-frequency heating coils are arranged at both ends of the mouth having different length / width ratios in the longer length / width direction.
Heating with high-frequency heating coils placed at both ends of the longer length and width of the mouth without surrounding the periphery of the mouth with different aspect ratio, the height and width of the mouth The longer ends can be heated sufficiently, and the shorter ends are not overheated.The entire circumference of the mouth can be heated at a uniform temperature and completely sealed. become able to.

【００１７】さらに、この発明の請求項５記載のプラス
チック容器の口部封止装置は、請求項４記載の構成に加
え、前記縦・横比の異なる口部を楕円形または矩形と
し、前記高周波加熱コイルを楕円または矩形の長径また
は長軸方向両端側に配置したことを特徴とするものであ
る。According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect, in the apparatus for sealing a mouth of a plastic container, the mouths having different aspect ratios are formed into an elliptical shape or a rectangular shape. The heating coil is arranged at the major axis of the ellipse or rectangle or at both ends in the major axis direction.

【００１８】このプラスチック容器の口部封止装置によ
れば、前記縦・横比の異なる口部を楕円形または矩形と
し、前記高周波加熱コイルを楕円の長径方向両端側また
は矩形の長軸方向両端側に配置するようにしており、楕
円形や矩形の口部の場合にも全周を均一な温度で加熱し
てシール材を溶着して封止できるようになる。According to the apparatus for sealing the mouth of a plastic container, the mouths having different aspect ratios are made elliptical or rectangular, and the high-frequency heating coil is placed at both ends in the major axis direction of the ellipse or both ends in the major axis direction of the rectangle. In the case of an elliptical or rectangular mouth, the entire circumference can be heated at a uniform temperature and the sealing material can be welded and sealed.

【００１９】また、この発明の請求項６記載のプラスチ
ック容器の口部封止装置は、請求項４または５記載の構
成に加え、前記シール材を、アルミフィルムを基材とし
て構成したことを特徴とするものである。According to a sixth aspect of the present invention, there is provided an apparatus for sealing a mouth of a plastic container, wherein the sealing material is formed of an aluminum film as a base material. It is assumed that.

【００２０】このプラスチック容器の口部封止装置によ
れば、前記シール材を、アルミフィルムを基材として構
成するようにしており、アルミフィルムを基材としたシ
ール材を用いる場合にも全周を均一な温度で加熱して封
止することができるようになる。According to the apparatus for sealing the mouth of a plastic container, the sealing material is constituted by using an aluminum film as a base material. Can be heated and sealed at a uniform temperature.

【００２１】[0021]

【発明の実施の形態】以下、この発明のプラスチック容
器の口部封止方法およびその装置の一実施の形態につい
て図面に基づき詳細に説明する。図１および図２はこの
発明のプラスチック容器の口部封止方法を楕円形状の口
部に適用した場合の一実施の形態にかかり、図１は概略
工程図、図２は高周波加熱コイル部分の拡大平面図およ
び拡大正面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for sealing a mouth of a plastic container and an apparatus therefor according to the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment in which the method for sealing the mouth of a plastic container according to the present invention is applied to an elliptical mouth. FIG. 1 is a schematic process diagram, and FIG. It is an enlarged plan view and an enlarged front view.

【００２２】このプラスチック容器の口部封止方法で
は、口部が楕円形（横断面形状）の場合について、高周
波加熱コイルによる均一加熱の条件を種々実験検討を行
ったところ、楕円形の口部の外側周囲を楕円形に形成し
た高周波加熱コイルで囲んで口部周囲からほぼ等距離と
して高周波加熱するようにしても不均一な加熱を解消す
ることが出来ず、口部の楕円形の長径方向の両端部に高
周波加熱コイルを配置して加熱することが均一加熱に有
効であることが分かった。In this method for sealing the mouth of a plastic container, when the mouth was elliptical (cross-sectional shape), various conditions for uniform heating using a high-frequency heating coil were examined. Even if the outer periphery of the mouth is surrounded by an elliptical high-frequency heating coil and the high-frequency heating is performed at substantially the same distance from the periphery of the mouth, uneven heating cannot be eliminated. It has been found that arranging high-frequency heating coils at both ends of the sample and heating is effective for uniform heating.

【００２３】そこで、このプラスチック容器の口部封止
方法では、１つの高周波発振機５から高周波電流が供給
される２つの高周波加熱コイル１１，１２を直列に接続
し、プラスチック容器１の口部２の楕円形の長径ａの一
端側に１つの高周波加熱コイル１１を配置し、この高周
波加熱コイル１１から長径ａの他端側にもう１つの高周
波加熱コイル１２を配置し、この他端側の高周波加熱コ
イル１２を経て高周波電流が流れるようにしてある。そ
して、それぞれの高周波加熱コイル１１，１２には、フ
ェライトコア１３，１４が中心部に配置してある。Therefore, in this method for sealing the mouth of a plastic container, two high-frequency heating coils 11 and 12 to which high-frequency current is supplied from one high-frequency oscillator 5 are connected in series, and the mouth 2 of the plastic container 1 is connected. One high-frequency heating coil 11 is arranged at one end of the major axis a of the elliptical shape, and another high-frequency heating coil 12 is arranged at the other end of the major axis a from the high-frequency heating coil 11. A high-frequency current flows through the heating coil 12. Ferrite cores 13 and 14 are arranged at the center of each of the high-frequency heating coils 11 and 12.

【００２４】このようなプラスチック容器１の口部２の
形状の縦・横の長い方の両端側、すなわち楕円の長径ａ
と短径ｂのうち、長い方である長径ａの両端側（長径ａ
の延長方向側）にそれぞれ高周波加熱コイル１１，１２
を配置して口部２を封止する場合には、マヨネーズのプ
ラスチック容器のように口部が大きく、しかも内容物に
星形などの断面形状で絞り出す場合には、プラスチック
樹脂としての絞り口を形成したプラスチックの口板（図
示せず）を介してシール面側にプラスチックコーティン
グされたアルミフィルム３を当て、わさびのプラスチッ
ク容器のように口部が比較的小さい場合などには、プラ
スチック樹脂としてのプラスチック樹脂がコーティング
されたアルミフィルム３だけを当て、口部２の長径ａ方
向両端側の２つの高周波加熱コイル１１，１２に高周波
電流を流し、アルミフィルム３に流れる誘導電流で加熱
する。The longitudinal end of the shape of the mouth portion 2 of the plastic container 1 is longer, that is, the major axis a of the ellipse
And the shorter diameter b, the longer end of the longer diameter a (the longer diameter a
High-frequency heating coils 11 and 12
When the mouth portion 2 is sealed by disposing the opening portion, the mouth portion is large like a mayonnaise plastic container, and when the contents are squeezed out in a cross-sectional shape such as a star, a squeeze mouth as a plastic resin is used. A plastic-coated aluminum film 3 is applied to the sealing surface side via a formed plastic mouth plate (not shown), and when the mouth portion is relatively small like a wasabi plastic container, a plastic resin is used. A high-frequency current is applied to the two high-frequency heating coils 11 and 12 at both ends in the major axis a direction of the mouth 2 by applying only the aluminum film 3 coated with a plastic resin, and the aluminum film 3 is heated by an induced current.

【００２５】なお、プラスチック樹脂としてプラスチッ
ク樹脂の口板を介在させる場合には、シール面側のプラ
スチックコーティングをしなくても良く、別体の口板等
のプラスチック樹脂を配置しない場合には、シール面へ
のコーティングが必要となる。In the case where a plastic resin mouth plate is interposed as the plastic resin, the plastic coating on the sealing surface side is not necessary, and when no plastic resin such as a separate mouth plate is disposed, the sealing resin is not required. Coating on the surface is required.

【００２６】すると、アルミフィルム３は楕円形であっ
ても均一に加熱され、アルミフィルム３のシール面のプ
ラスチックコーティングが溶融されるとともに、口板
（図示せず）を介在させた場合には口板も加熱され、プ
ラスチック容器１の口部２に口板とアルミフィルム３、
あるいはアルミフィルム３が溶着され、口部２を完全に
封止することができる。Then, even if the aluminum film 3 has an elliptical shape, it is uniformly heated, the plastic coating on the sealing surface of the aluminum film 3 is melted, and the opening is formed when a mouth plate (not shown) is interposed. The plate is also heated, and a mouth plate and an aluminum film 3,
Alternatively, the aluminum film 3 is welded, and the opening 2 can be completely sealed.

【００２７】なお、この実施の形態では、プラスチック
容器の口部の縦・横比の異なる形状として非円形の楕円
形にする場合で説明したが、これに限らず矩形など他の
形状であっても良く、この場合にも縦・横の長さの長い
方の両端側に高周波加熱コイルを配置するようにすれば
均一に加熱し、溶着して封止することができる。In this embodiment, the case where the shape of the mouth portion of the plastic container has a different aspect ratio from the non-circular elliptical shape has been described. However, the present invention is not limited to this. In this case as well, if high-frequency heating coils are arranged at both ends of the longer one of the vertical and horizontal lengths, it is possible to uniformly heat, weld and seal.

【００２８】また、口部を封止するシール材としてアル
ミフィルムを用いる場合に限らず、厚さの異なるアルミ
シート等のほか金属フィルムや金属シート、あるいは金
属板であっても良く、高周波誘導電流で加熱できるもの
であれば良い。The present invention is not limited to the case where an aluminum film is used as a sealing material for sealing the mouth, but may be an aluminum sheet having a different thickness, or a metal film or a metal sheet or a metal plate. Anything can be used as long as it can be heated.

【００２９】さらに、口部を封止するシール材としてア
ルミフィルムを用い、少なくともシール面側に配するプ
ラスチック樹脂としてプラスチックをコーティングした
り、別体の口板等を介在させるようにしたが、このプラ
スチック樹脂はプラスチック容器の本体と同一のポリエ
チレン、ポリプロピレンなど、プラスチック容器に加熱
溶着できるものであれば良い。Further, an aluminum film is used as a sealing material for sealing the mouth, and plastic is coated as a plastic resin disposed at least on the sealing surface side, or a separate mouth plate or the like is interposed. The plastic resin may be polyethylene, polypropylene or the like, which is the same as the plastic container body, as long as it can be heated and welded to the plastic container.

【００３０】また、プラスチック容器は、通常用いられ
ているマヨネーズやわさび等の容器の可撓性プラスチッ
ク容器などのほか、可撓性のないプラスチック容器等ど
のようなものでも良く、本体部分の形状も適宜選択すれ
ば良く、さらに口部にキャップをするものに限らず、キ
ャップをしないものでも良い。The plastic container may be any commonly used flexible plastic container such as mayonnaise or wasabi, or a non-flexible plastic container. It may be appropriately selected, and is not limited to one having a cap on the mouth, and may be one without a cap.

【００３１】次に、この発明のプラスチック容器の口部
封止装置の一実施の形態について、図面に基づき詳細に
説明する。図３および図４はこの発明のプラスチック容
器の口部封止装置を楕円形状の口部に適用した場合の一
実施の形態にかかり、図３は概略正面図、図４は高周波
加熱コイル部分の概略平面図である。Next, an embodiment of the apparatus for sealing the mouth of a plastic container according to the present invention will be described in detail with reference to the drawings. 3 and 4 show an embodiment in which the device for sealing the mouth of a plastic container according to the present invention is applied to an elliptical mouth. FIG. 3 is a schematic front view, and FIG. It is a schematic plan view.

【００３２】このプラスチック容器の口部封止装置２０
では、２つのプラスチック容器１の口部２を同時に封止
するものであり、基板２１上にプラスチック容器１を昇
降する昇降台２２が２つ設けられ、図示しない昇降駆動
機構によって内容物が充填されたプラスチック容器１を
封止位置Ｈまで昇降できるようになっている。This plastic container mouth sealing device 20
In this example, the mouth portions 2 of the two plastic containers 1 are simultaneously sealed, and two elevating tables 22 for elevating and lowering the plastic containers 1 are provided on the substrate 21, and the contents are filled by an elevating drive mechanism (not shown). The plastic container 1 can be moved up and down to the sealing position H.

【００３３】また、基板２１の上方の封止位置Ｈには、
４本の支柱２３で支持された高周波加熱部２４が設けら
れており、プラスチック容器１の口部２が挿入される貫
通孔２５が２つ形成されている。そして、これらの高周
波加熱部２４の貫通孔２５の内側には、図４に示すよう
に、口部２の縦・横の長さの長い方、ここでは楕円形の
口部２の楕円の長径ａの延長上の両端部に、それぞれ高
周波加熱コイル２６，２７と高周波加熱コイル２８，２
９とが直列に接続されて配置されるとともに、コイル２
６〜２９の中心部にフェライトコア３０〜３３が設けて
ある。At the sealing position H above the substrate 21,
A high-frequency heating unit 24 supported by four columns 23 is provided, and two through holes 25 into which the mouth 2 of the plastic container 1 is inserted are formed. As shown in FIG. 4, inside the through hole 25 of the high-frequency heating unit 24, as shown in FIG. a high-frequency heating coils 26 and 27 and high-frequency heating coils 28 and 2
9 are connected in series and arranged.
Ferrite cores 30 to 33 are provided at the center of 6 to 29.

【００３４】これら高周波加熱コイル２６〜２９は、高
周波電流により高温になることから中空パイプで構成さ
れ、内部が冷却水流路とされ、冷却水を循環して冷却で
きるようになっている。Each of the high-frequency heating coils 26 to 29 is formed of a hollow pipe because the temperature thereof becomes high due to a high-frequency current, and the inside thereof is a cooling water flow path, so that cooling water can be circulated and cooled.

【００３５】このような高周波加熱部２４の上方には、
４本のガイドロッド３４を介して上部架台３５が設けら
れ、この上部架台３５にアルミフィルムなどの金属シー
ル材３を真空吸着するとともに、プラスチック容器１の
口部２に押付る押圧ロッド３６が設けられ、押圧ガイド
３７でガイドされ、流体圧シリンダ３８で上下に伸縮駆
動されるようになっており、ばね３９で引き戻されるよ
うにしてある。Above such a high-frequency heating unit 24,
An upper pedestal 35 is provided via four guide rods 34, and a metal rod 3 such as an aluminum film is vacuum-sucked to the upper pedestal 35, and a pressing rod 36 for pressing the opening 2 of the plastic container 1 is provided. It is guided by a pressing guide 37, is driven to expand and contract by a hydraulic cylinder 38, and is pulled back by a spring 39.

【００３６】このように構成したプラスチック容器の口
部封止装置２０では、昇降台２２に同一の２つのプラス
チック容器１を口部２を上にして搭載し、図示しない昇
降機構により封止位置Ｈまで上昇させ、高周波加熱部２
４の貫通孔２５の中央に口部２の上端面を位置させる。In the plastic container mouth sealing device 20 constructed as described above, the same two plastic containers 1 are mounted on the elevating platform 22 with the mouth 2 up, and the sealing position H is set by an elevating mechanism (not shown). To the high-frequency heating section 2
The upper end surface of the mouth portion 2 is located at the center of the through hole 25 of No. 4.

【００３７】この後、押圧ロッド３６の下端部にプラス
チックコーティングされたアルミフィルム３を真空吸着
させて取り付け、流体圧シリンダ３８のロッドを下方に
伸長してプラスチック容器１の口部２にアルミフィルム
３を押し当てる。Thereafter, the aluminum film 3 coated with plastic is attached to the lower end of the pressing rod 36 by vacuum suction, and the rod of the fluid pressure cylinder 38 is extended downward to insert the aluminum film 3 into the mouth 2 of the plastic container 1. Press.

【００３８】こうして準備が完了した後、高周波発振機
から高周波電流を供給し、４つの高周波加熱コイル２６
〜２９に直列に高周波電流を流し、楕円形の口部２の長
径ａ方向両端側の２つの高周波加熱コイル２６，２７お
よび２８，２９によってアルミフィルム３に誘導電流を
発生させて加熱する。After the preparation is completed, a high-frequency current is supplied from a high-frequency oscillator and the four high-frequency heating coils 26
A high-frequency current is supplied in series to the aluminum film 3 to heat the aluminum film 3 by two high-frequency heating coils 26, 27 and 28, 29 at both ends of the elliptical mouth 2 in the major axis a direction.

【００３９】すると、アルミフィルム３は楕円形であっ
ても均一に加熱され、アルミフィルム３のシール面のプ
ラスチックコーティングが溶融されるとともに、口板
（図示せず）を介在させた場合には口板も加熱され、プ
ラスチック容器１の口部２に口板とアルミフィルム３、
あるいはアルミフィルム３が溶着され、口部２の全周を
完全に封止することができる。Then, even if the aluminum film 3 has an elliptical shape, it is uniformly heated, the plastic coating on the sealing surface of the aluminum film 3 is melted, and when the mouth plate (not shown) is interposed, the mouth is not heated. The plate is also heated, and a mouth plate and an aluminum film 3,
Alternatively, the aluminum film 3 is welded, so that the entire periphery of the opening 2 can be completely sealed.

【００４０】こうしてアルミフィルム３によるプラスチ
ック容器１の口部２の封止が完了した後、押圧ロッド３
６をばね３９で上昇退避させるとともに、昇降台２２を
下降させ、プラスチック容器１を下降させて１回の封止
が完了する。After the sealing of the opening 2 of the plastic container 1 with the aluminum film 3 is completed, the pressing rod 3
6 is lifted and retracted by the spring 39, the lifting table 22 is lowered, and the plastic container 1 is lowered to complete one sealing.

【００４１】このようなプラスチック容器の口部封止装
置２０によれば、口部２が楕円形でアルミフィルム３が
楕円形であっても均一に加熱することができる。According to the apparatus 20 for sealing the mouth of a plastic container, even if the mouth 2 is elliptical and the aluminum film 3 is elliptical, heating can be performed uniformly.

【００４２】なお、この実施の形態では、プラスチック
容器の口部の縦・横比の異なる形状として非円形の楕円
形にする場合で説明したが、これに限らず矩形など他の
形状であっても良く、この場合にも縦・横の長さの長い
方の両端側、例えば矩形の長軸側に、高周波加熱コイル
を配置するようにすれば、全周を均一な温度で加熱し、
溶着して封止することができる。In this embodiment, the case where the shape of the mouth portion of the plastic container has a different aspect ratio from the non-circular elliptical shape has been described. However, the present invention is not limited to this. Also in this case, if a high-frequency heating coil is arranged on both ends of the longer one of the vertical and horizontal lengths, for example, on the long axis of the rectangle, the entire circumference is heated at a uniform temperature,
It can be sealed by welding.

【００４３】また、口部を封止するシール材としてアル
ミフィルムを用いる場合に限らず、厚さの異なるアルミ
シート等のほか金属フィルムや金属シート、あるいは金
属板であっても良く、高周波誘導電流で加熱できるもの
であれば良い。The present invention is not limited to the case where an aluminum film is used as a sealing material for sealing the mouth, but may be an aluminum sheet having a different thickness, or a metal film, a metal sheet, or a metal plate. Anything can be used as long as it can be heated.

【００４４】さらに、口部を封止するシール材としてア
ルミフィルムを用い、少なくともシール面側にプラスチ
ック樹脂としてプラスチックをコーティングするように
したが、別体のプラスチックフィルムやプラスチック板
をプラスチック樹脂として配するようにしても良く、こ
のプラスチック樹脂としてはプラスチック容器の本体と
同一のポリエチレン、ポリプロピレンなど、プラスチッ
ク容器に加熱溶着できるものであれば良い。Further, an aluminum film is used as a sealing material for sealing the mouth, and plastic is coated as a plastic resin on at least the sealing surface side. However, a separate plastic film or plastic plate is provided as the plastic resin. The plastic resin may be any plastic resin, such as polyethylene or polypropylene, which is the same as the main body of the plastic container, as long as it can be welded to the plastic container.

【００４５】また、プラスチック容器は、通常用いられ
ているマヨネーズやわさび等の容器の可撓性プラスチッ
ク容器などのほか、可撓性のないプラスチック容器等ど
のようなものでも良く、本体部分の形状も適宜選択すれ
ば良く、さらに口部にキャップをするものに限らず、キ
ャップをしないものでも良い。The plastic container may be a flexible plastic container of a container such as mayonnaise or wasabi which is usually used, or a non-flexible plastic container. It may be appropriately selected, and is not limited to one having a cap on the mouth, and may be one without a cap.

【００４６】さらに、プラスチック容器を封止位置Ｈに
昇降する昇降台やアルミフィルムを口部に押し当てる押
圧ロッドなどの構成は図示例に限らず、他の昇降機構や
押圧機構を用いるようにしても良い。Further, the constructions of the lifting platform for lifting the plastic container to the sealing position H and the pressing rod for pressing the aluminum film against the mouth are not limited to those shown in the drawings, and other lifting mechanisms and pressing mechanisms may be used. Is also good.

【００４７】[0047]

【発明の効果】以上、実施の形態とともに具体的に説明
したように、この発明の請求項１記載のプラスチック容
器の口部封止方法によれば、シール材の前記口部対向面
側には、前記口部と溶着可能なプラスチック樹脂を配
し、当該口部の縦・横の長さの長い方の両端側に高周波
加熱コイルを配置して加熱溶着するようにしたので、縦
・横比の異なる口部の周囲を囲むことなく、口部の縦・
横の長さの長い方の両端側に高周波加熱コイルを配置し
て加熱することで、口部の長さの短い方の両端側が過加
熱されずに全周にわたり均一な温度で加熱することがで
き、完全に封止することができる。As described above in detail with the embodiments, according to the method for sealing the mouth of a plastic container according to the first aspect of the present invention, the sealing material is provided on the side facing the mouth. Since a plastic resin that can be welded to the mouth is disposed, and high-frequency heating coils are arranged at both ends of the mouth having a longer vertical and horizontal length to perform heat welding, the aspect ratio is increased. Of the mouth without surrounding the mouth
By arranging high-frequency heating coils at both ends of the longer side and heating, the ends of the shorter side can be heated at a uniform temperature over the entire circumference without overheating. It can be completely sealed.

【００４８】また、この発明の請求項２記載のプラスチ
ック容器の口部封止方法によれば、前記縦・横比の異な
る口部を楕円形または矩形とし、前記高周波加熱コイル
で楕円または矩形の長径または長軸方向両端側から加熱
溶着するようにしたので、楕円形や矩形の口部の場合に
も均一な温度で加熱して金属シール材を溶着して封止す
ることができる。According to the method for sealing the mouth of a plastic container according to the second aspect of the present invention, the mouths having different aspect ratios are made elliptical or rectangular, and the elliptic or rectangular shape is formed by the high-frequency heating coil. Since heat welding is performed from both ends in the long diameter or long axis direction, even in the case of an elliptical or rectangular opening, it is possible to heat at a uniform temperature and weld and seal the metal sealing material.

【００４９】さらに、この発明の請求項３記載のプラス
チック容器の口部封止方法によれば、前記シール材をア
ルミフィルムを基材として構成するようにしたので、ア
ルミフィルムを基材としたシール材を用いる場合にも均
一な温度で加熱して封止することができる。Further, according to the method for sealing the mouth of a plastic container according to the third aspect of the present invention, since the sealing material is formed using an aluminum film as a base material, the sealing using an aluminum film as a base material is performed. Even when a material is used, it can be sealed by heating at a uniform temperature.

【００５０】また、この発明の請求項４記載のプラスチ
ック容器の口部封止装置によれば、縦・横比の異なる口
部の縦・横の長さの長い方の両端側に高周波加熱コイル
を配置するようにしたので、縦・横比の異なる口部の周
囲を囲むことなく、口部の縦・横の長さの長い方の両端
側に配置した高周波加熱コイルで加熱することで、口部
の縦・横の長さの長い方の両端側を十分に加熱できると
ともに、口部の長さの短い方の両端側が過加熱されず、
口部の全周を均一な温度で加熱して完全に封止すること
ができる。According to the apparatus for sealing the mouth of a plastic container according to the fourth aspect of the present invention, the high-frequency heating coils are provided at both ends of the mouth having different aspect ratios in the longitudinal and lateral directions. Because it is arranged, without surrounding the periphery of the mouth with different aspect ratio, by heating with high-frequency heating coils arranged on both ends of the longer length and width of the mouth, In addition to being able to adequately heat both long sides of the mouth, the long sides of the mouth are not overheated,
The entire periphery of the mouth portion can be heated at a uniform temperature and completely sealed.

【００５１】さらに、この発明の請求項５記載のプラス
チック容器の口部封止装置によれば、前記縦・横比の異
なる口部を楕円形または矩形とし、前記高周波加熱コイ
ルを楕円または矩形の長径または長軸方向両端側に配置
するようにしたので、楕円形や矩形の口部の場合にも全
周を均一な温度で加熱してシール材を溶着して封止する
ことができる。Further, according to the apparatus for sealing the mouth portion of a plastic container according to the fifth aspect of the present invention, the mouth portions having different aspect ratios are made elliptical or rectangular, and the high-frequency heating coil is made elliptical or rectangular. Since it is arranged at both ends in the major axis or major axis direction, even in the case of an elliptical or rectangular mouth, the entire circumference can be heated at a uniform temperature and the sealing material can be welded and sealed.

【００５２】また、この発明の請求項６記載のプラスチ
ック容器の口部封止装置によれば、前記シール材を、ア
ルミフィルムを基材として構成するようにしたので、ア
ルミフィルムのシール材を用いる場合にも全周を均一な
温度で加熱して封止することができる。Further, according to the apparatus for sealing the mouth of a plastic container according to the sixth aspect of the present invention, since the sealing material is formed using an aluminum film as a base material, an aluminum film sealing material is used. Also in this case, the entire circumference can be sealed by heating at a uniform temperature.

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

【図１】この発明のプラスチック容器の口部封止方法を
楕円形状の口部に適用した場合の一実施の形態にかかる
概略工程図である。FIG. 1 is a schematic process diagram according to an embodiment when the method for sealing a mouth of a plastic container of the present invention is applied to an elliptical mouth.

【図２】この発明のプラスチック容器の口部封止方法を
楕円形状の口部に適用した場合の一実施の形態にかかる
高周波加熱コイル部分の拡大平面図および拡大正面図で
ある。FIG. 2 is an enlarged plan view and an enlarged front view of a high-frequency heating coil portion according to an embodiment when the method for sealing the mouth of a plastic container of the present invention is applied to an elliptical mouth.

【図３】この発明のプラスチック容器の口部封止装置を
楕円形状の口部に適用した場合の一実施の形態にかかる
概略正面図である。FIG. 3 is a schematic front view of an embodiment in which the mouth sealing device for a plastic container of the present invention is applied to an elliptical mouth.

【図４】この発明のプラスチック容器の口部封止装置を
楕円形状の口部に適用した場合の一実施の形態にかかる
高周波加熱コイル部分の概略平面図である。FIG. 4 is a schematic plan view of a high-frequency heating coil according to one embodiment when the mouth sealing device for a plastic container of the present invention is applied to an elliptical mouth.

【図５】従来のプラスチック容器の口部封止方法の工程
説明図である。FIG. 5 is a process explanatory view of a conventional method for sealing a mouth of a plastic container.

【符号の説明】[Explanation of symbols]

１ プラスチック容器 ２ 口部 ３ アルミフィルム（シール材） ５ 高周波発振機 １１ 高周波加熱コイル １２ 高周波加熱コイル ａ 楕円の長径方向 ｂ 楕円の短径方向 ２０ プラスチック容器の口部封止装置 ２１ 基板 ２２ 昇降台 ２３ 支柱 ２４ 高周波加熱部 ２５ 貫通孔 ２６ 高周波加熱コイル ２７ 高周波加熱コイル ２８ 高周波加熱コイル ２９ 高周波加熱コイル ３０〜３３ フェライトコア ３４ ガイドロッド ３５ 上部架台 ３６ 押圧ロッド ３７ 押圧ガイド ３８ 流体圧シリンダ ３９ ばね Ｈ 封止位置 REFERENCE SIGNS LIST 1 plastic container 2 mouth 3 aluminum film (seal material) 5 high-frequency oscillator 11 high-frequency heating coil 12 high-frequency heating coil a major axis of ellipse b minor axis of ellipse 20 plastic container mouth sealing device 21 substrate 22 elevator 23 Support 24 High-frequency heating part 25 Through-hole 26 High-frequency heating coil 27 High-frequency heating coil 28 High-frequency heating coil 29 High-frequency heating coil 30 to 33 Ferrite core 34 Guide rod 35 Upper frame 36 Press rod 37 Press guide 38 Fluid pressure cylinder 39 Spring H sealing Stop position

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】プラスチック容器の縦・横比の異なる口部
をシール材で封止するに際し、前記シール材の前記口部
対向面側には、前記口部と溶着可能なプラスチック樹脂
を配し、当該口部の縦・横の長さの長い方の両端側に高
周波加熱コイルを配置して加熱溶着するようにしたこと
を特徴とするプラスチック容器の口部封止方法。When sealing a mouth portion of a plastic container having a different aspect ratio with a sealing material, a plastic resin that can be welded to the mouth portion is disposed on the side of the sealing material facing the mouth portion. A method for sealing a mouth of a plastic container, wherein high-frequency heating coils are arranged at both ends of the mouth having a longer length in the vertical and horizontal directions to heat and weld. 【請求項２】前記縦・横比の異なる口部を楕円形または
矩形とし、前記高周波加熱コイルで楕円または矩形の長
径または長軸方向両端側から加熱溶着するようにしたこ
とを特徴とする請求項１記載のプラスチック容器の口部
封止方法。2. The method according to claim 1, wherein the mouth portions having different aspect ratios are elliptical or rectangular, and the high-frequency heating coil heats and welds the elliptical or rectangular shape from both ends in the major axis or major axis direction. Item 7. The method for sealing a mouth of a plastic container according to Item 1. 【請求項３】前記シール材を、アルミフィルムを基材と
して構成したことを特徴とする請求項１または２記載の
プラスチック容器の口部封止方法。3. The method according to claim 1, wherein the sealing material is formed of an aluminum film as a base material. 【請求項４】プラスチック容器の縦・横比の異なる口部
を、シール材の前記口部対向面側に当該口部と溶着可能
なプラスチック樹脂を配して当該シール材を加熱溶着し
て封止する装置であって、当該口部の縦・横の長さの長
い方の両端側に高周波加熱コイルを配置したことを特徴
とするプラスチック容器の口部封止装置。4. A plastic container which has a different aspect ratio from the plastic container, and a plastic resin which can be welded to the opening is disposed on the side of the sealing material facing the mouth, and the sealing material is heated and welded. A high-frequency heating coil is disposed at both ends of a longer vertical and horizontal length of the mouth portion, the mouth portion sealing device for a plastic container. 【請求項５】前記縦・横比の異なる口部を楕円形または
矩形とし、前記高周波加熱コイルを楕円または矩形の長
径または長軸方向両端側に配置したことを特徴とする請
求項４記載のプラスチック容器の口部封止装置。5. The apparatus according to claim 4, wherein the mouth portions having different aspect ratios are elliptical or rectangular, and the high-frequency heating coils are arranged on both sides of the major axis or major axis of the ellipse or rectangle. A device for sealing the mouth of a plastic container. 【請求項６】前記シール材を、アルミフィルムを基材と
して構成したことを特徴とする請求項４または５記載の
プラスチック容器の口部封止装置。6. An apparatus for sealing a mouth of a plastic container according to claim 4, wherein said sealing material is constituted by using an aluminum film as a base material.
JP2000176665A 2000-06-13 2000-06-13 Mouth sealing method and apparatus for plastic container Expired - Lifetime JP4479061B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000176665A JP4479061B2 (en) 2000-06-13 2000-06-13 Mouth sealing method and apparatus for plastic container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000176665A JP4479061B2 (en) 2000-06-13 2000-06-13 Mouth sealing method and apparatus for plastic container

Publications (2)

Publication Number Publication Date
JP2001354211A true JP2001354211A (en) 2001-12-25
JP4479061B2 JP4479061B2 (en) 2010-06-09

Family

ID=18678366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000176665A Expired - Lifetime JP4479061B2 (en) 2000-06-13 2000-06-13 Mouth sealing method and apparatus for plastic container

Country Status (1)

Country Link
JP (1) JP4479061B2 (en)

Also Published As

Publication number Publication date
JP4479061B2 (en) 2010-06-09

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