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JP3572429B2 - High frequency heating and sealing device for lid to container - Google Patents

High frequency heating and sealing device for lid to container Download PDF

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Publication number
JP3572429B2
JP3572429B2 JP23238295A JP23238295A JP3572429B2 JP 3572429 B2 JP3572429 B2 JP 3572429B2 JP 23238295 A JP23238295 A JP 23238295A JP 23238295 A JP23238295 A JP 23238295A JP 3572429 B2 JP3572429 B2 JP 3572429B2
Authority
JP
Japan
Prior art keywords
lid
container
heat
elastic body
resistant elastic
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.)
Expired - Lifetime
Application number
JP23238295A
Other languages
Japanese (ja)
Other versions
JPH0977006A (en
Inventor
芳文 三木
義一 安田
豊 青山
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.)
Shikoku Kakoki Co Ltd
SPC Electronics Corp
Resonac Packaging Corp
Original Assignee
Shikoku Kakoki Co Ltd
SPC Electronics Corp
Showa Denko Packaging 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 Shikoku Kakoki Co Ltd, SPC Electronics Corp, Showa Denko Packaging Co Ltd filed Critical Shikoku Kakoki Co Ltd
Priority to JP23238295A priority Critical patent/JP3572429B2/en
Publication of JPH0977006A publication Critical patent/JPH0977006A/en
Application granted granted Critical
Publication of JP3572429B2 publication Critical patent/JP3572429B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C65/3656—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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—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
    • B29C66/24221—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 circular
    • 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
    • B29C66/70—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
    • B29C66/735—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 extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • 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
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/746—Joining plastics material to non-plastics material to inorganic materials not provided for in groups B29C66/742 - B29C66/744
    • B29C66/7465—Glass
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Closing Of Containers (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、金属箔層を含んだ蓋をガラス容器等に高周波加熱シールするのに使用される、容器に対する蓋の高周波加熱シール装置に関する。
【０００２】
【従来の技術】
蓋の容器口縁部対応部分を加熱するリング状の誘導加熱用コイルと、蓋を容器口縁部に押圧する耐熱弾性体とを備え、誘導加熱用コイルに高周波電流を流して蓋の容器口縁部対応部分を誘導加熱するとともに、耐熱弾性体により蓋を容器口縁部に押圧することにより、容器に蓋を高周波加熱シールする装置は、従来より知られている（特公昭４７−５０１５６号公報参照）。
【０００３】
また、誘導加熱用コイルに接して磁束集中用磁性体を配置し、加熱効果を増加させることも知られている（実公昭６０−１３７６７号公報参照）。
【０００４】
【発明が解決しようとする課題】
上記従来の容器に対する蓋の高周波加熱シール装置により、ガラス容器のようにシール面が平坦でないものに蓋をシールする場合、耐熱弾性体の厚みが薄いと、加圧時に容器と蓋を密着させる効果が乏しくかつ耐久性にも欠けるため、耐熱弾性体の厚みは２〜３ミリ必要となる。
【０００５】
ところが、耐熱弾性体の厚みを２〜３ミリと厚くとすると、誘導加熱用コイルと蓋の距離が離れるために、蓋の加熱すべき部分における磁界の集中性が弱まって、必要な加熱効果が得られなくなってしまう。したがって、容器の口径より大きい蓋をシールする場合や、開封用つまみ部付き蓋をシールする場合には、蓋の外周縁部に沿って発熱が起こるため、シール部が十分加熱されずにシール強度不足になったり、また、十分なシール強度を得るべく強く加熱すると熱量過多となり、蓋の外周縁部や開封用つまみ部に焦げが発生するという問題があった。
【０００６】
この発明の目的は、容器の口径より大きい蓋をシールする場合や、開封用つまみ部付き蓋をシールする場合であっても、十分なシール強度が得られ、かつ蓋の外周縁部や開封用つまみ部に焦げが発生することがなく、しかも、耐熱弾性体の厚みを厚くできるため、ガラス容器のようにシール面が平坦でないものに対しても十分なシール性が得られる容器に対する蓋のヒートシール装置を提供することにある。
【０００７】
【課題を解決するための手段】
この発明による容器に対する蓋の高周波加熱シール装置は、蓋の容器口縁部対応部分を加熱するリング状の誘導加熱用コイルと、蓋を容器口縁部に押圧する耐熱弾性体と、磁束を集中させて加熱効果を増加させる磁性体とを備えている、容器に対する蓋の高周波加熱シール装置において、耐熱弾性体はリング状で、その内径が容器口径にほぼ等しく、磁性体はリング状または円盤状で、耐熱弾性体の内側にこれと間隙をおいてかつ底面同士が同レベルとなるように配置され、コイルが、磁性体と耐熱弾性体との間隙を埋めかつその底面が磁性体および耐熱弾性体の各底面とほぼ面一である環状下方突出部を有していることを特徴とするものである。
【０００８】
この発明の容器に対する蓋の高周波加熱シール装置によると、誘導加熱用コイルに高周波電流を流したさいに生じる磁束は、磁束集中用磁性体により集められ、蓋の容器口径のすぐ内側に対応する部分が強く加熱される。この熱が蓋の容器口縁部対応部分すなわち蓋のシールされるべき部分に伝わり、蓋の容器口縁部対応部分が耐熱弾性体に押圧されることにより、蓋が均一にヒートシールされる。
【０００９】
上記の加熱作用は、耐熱弾性体によっては、弱められることはなく、耐熱弾性体の厚みを厚くしても、加熱性能が低下することがない。
【００１０】
【発明の実施の形態】
この発明の実施の形態を、以下図面を参照して説明する。
【００１１】
図１に示す容器に対する蓋の高周波加熱シール装置は、金属箔層を含んだ蓋（７） をガラス容器口縁部（９） に加熱シールするもので、蓋（７） の容器口縁部対応部分を加熱するリング状の誘導加熱用２次コイル（３） 、蓋（７） を容器口縁部（９） に押圧する耐熱弾性体（６） 、磁束を集中させて加熱効果を増加させる磁性体（４） を備えたシールブースタ（１） と、２次コイル（３） と磁気結合するようにシールブースタ（１） の上方に配置された１次コイル（２） とを備えている。２次コイル（３） は、１ターンコイルを形成するためのスリットを有している。１次コイル（２） はプラスチック等の絶縁物に内蔵されて、シールブースタ（１） 上方で固定されており、シールブースタ（１） は１次コイル（２） に固定されている。
【００１２】
耐熱弾性体（６） は、シリコンゴム製で厚さが３ｍｍの断面形状が方形のリング状であり、その内径は容器（８） の口径に等しく、その外径は容器口縁部（９） の外径よりも大きくなされている。
【００１３】
磁性体（４） は、フェライト製で断面形状が方形のリング状であり、耐熱弾性体（６） の内側に間隙をおいて配置されている。磁性体（４） の底面は耐熱弾性体（６） の底面と同レベルで、その厚さは耐熱弾性体（６） よりも厚くなされている。
【００１４】
２次コイル（３） は、耐熱弾性体（６） の外側にあって上面が１次コイル（２） 近くに位置しかつ底面が耐熱弾性体（６） の底面と同レベルである垂直部（３ａ）と、耐熱弾性体（６） の上側にあって内周面が磁性体（４） の外周面に接する水平部（３ｂ）と、水平部（３ｂ）内周縁部より下方に突出し磁性体（４） と耐熱弾性体（６） との間隙を埋めかつその底面が磁性体（４） および耐熱弾性体（６） の各底面と面一である環状下方突出部（３ｃ）とよりなる。下方突出部（３ｃ）の肉厚Ｔは、厚すぎるとシールに不要な蓋（７） の内側を余分に加熱することになる。下方突出部（３ｃ）の肉厚Ｔは、容器と蓋（７） の材質構成および寸法・形状等により決定すべきものであり、０．５ｍｍ〜２ミリの範囲が妥当である。垂直部（３ａ）外側には水冷用パイプ（５） が接合されている。
【００１５】
この発明による上記高周波加熱シール装置によりガラス容器（８） の口縁部（９） に金属箔層を含んだ蓋（７） を高周波加熱シールするには、次のようにして行う。
【００１６】
蓋（７） は、図２および図３に示すように、上面が耐熱製樹脂（１１）でコーティングされたアルミニウム箔層（１２）と、これの底面に接着剤層（１３）を介して設けられた高周波加熱シール材層（１４）とによって構成されており、開封用つまみ部（７ａ）が設けられている。
【００１７】
まず、シールブースタ（１） の下方に設けられた昇降装置（図示略）の台座上の所定位置に、ガラス容器（８） を載せ、この容器（８） に蓋（７） を被せる。ついで昇降装置の台座を上昇させ、容器（８） に被せられた蓋（７） をシールブースタ（１） に押し付ける。ここで、１次コイル（２） に高周波電流を例えば１秒間流す。すると、２次コイル（３） に誘導電流が流れ、２次コイル（３） 内に磁界が発生する。この磁束は、２次コイル（３） 内側に配置された磁性体（４） により集められ、容器（８） の口径より内側部分に対応する蓋（７） の部分に均一な渦電流を集中的に発生させる。これにより容器（８） の口径より内側部分に対応する蓋（７） の部分が加熱され、この熱がさらに蓋（７） の容器口縁部対応部分の高周波加熱シールされるべき部分に伝わり、蓋（７） が容器（８） にシールされる。冷却時間として例えば０．５秒間とって冷却し、加圧を解放してシールは完了する。
【００１８】
シリコンゴムよりなる耐熱弾性体（６） はその弾性により十分に変形可能であるため、蓋（７） の高周波加熱シール材層（１４）が耐熱弾性体（６） により押圧されて、蓋（７） が容器口縁部（９） に確実にシールされる。
【００１９】
比較のため、本発明の実施例と、磁性体が使用されていない従来のものとについて、シール強度を比較した結果を表１に示す。この評価で使用された蓋（７） は、上面が耐熱製樹脂（１１）でコーティングされた５０μｍのアルミニウム箔層（１２）と、これの底面に接着剤層（１３）を介して設けられた５０μｍの高周波加熱シール材層（１４）とによって構成されており、直径が５６ｍｍでかつ５ｍｍの開封用つまみ部（７ａ）が設けられている。ガラス容器（８） の外径は５２ｍｍである。シール強度は、図３に鎖線で示す箇所、すなわち、つまみ部（７ａ）と、つまみ部から９０度、１８０度および２７０度離れた非つまみ部とにおいて、蓋（７） を１５ｍｍ幅にカットし、９０度方向に引張り測定した。表１には１０回測定した結果の平均値を示す。
【００２０】
【表１】

Figure 0003572429
表１からわかるように、本発明の実施例のものは従来のものに比べて、シール強度が大きくなっているが、この差は開封用つまみ部（７ａ）において特に大きい。また、実施例のものは、測定箇所の違いによるばらつきが非常に小さくなっている。また、２次コイル（３） のスリットは、スリット部において磁力線がゼロとなり、シール性に悪影響を与えるものであるが、上記結果より、本発明の実施例のものは、スリットの悪影響を受けることなく蓋（７） を容器口縁部（９） に確実にシールできることも分かる。
【００２１】
上記において、磁性体（４） としてフェライトが使用されているが、フェライト以外でも、磁気抵抗の低い、したがって透磁率の高いものであればよく、ニッケル、コバルト等の金属の磁性体も使用できる。また、磁性体（４） の形状はリング状に限らず円盤状であってもよい。２次コイル（３） および磁性体（４） の大きさについては、蓋（７） および容器（８） の形状や材質などを考慮して決定される。２次コイル（３） には、銅、アルミニウム、真鍮などの固有抵抗の小さい金属が使用される。
【００２２】
また、耐熱弾性体（６） は、シリコーンラバー以外の耐熱合成ゴムやポリイミドフィルム等の耐熱合成樹脂フィルムであってもよい。耐熱弾性体（６） の厚みは、１．０ｍｍ以上で３．０ｍｍ以下が好ましい。耐熱弾性体（６） の厚みが薄すぎると、容器口縁部（９） の凹凸が大きい場合にその凹凸を吸収するのが難しい。
【００２３】
蓋（７） を構成する金属箔層は、アルミニウム箔層（１２）以外の金属箔層であってもよい。アルミニウム箔の場合は、その厚さは６〜１００μｍ、好ましくは２０〜５０μｍである。
【００２４】
また上記実施例においては、ガラス容器（８） の高周波加熱シールについて説明したが、この発明の装置は、その他例えば合成樹脂製容器等の容器にも適用可能である。
【００２５】
なお、上記実施例ではシールブースタ（１） は１次コイル（２） に固定されているが、シールブースタ（１） を回転自在のロータリー加圧板の回転軸を中心とする同一円周上に等間隔をおいてあけられた複数の孔に組込み、シールブースタ（１） が１次コイル（２） に対して移動できるようにしてもよい。シールブースタ（１） をロータリー加圧板に組み込むことにより、高速で安定確実な自動シール装置を実現することができる。
【００２６】
【発明の効果】
この発明の容器に対する蓋の高周波加熱シール装置によると、誘導加熱用コイルに高周波電流を流したさいに生じる磁束は、磁束集中用磁性体により集められ、蓋の容器口径のすぐ内側に対応する部分が強く加熱される。この熱が蓋の容器口縁部対応部分すなわち蓋のシールされるべき部分に伝わり、蓋の容器口縁部対応部分が耐熱弾性体に押圧されることにより、蓋が均一にヒートシールされるので、容器の口径より大きい蓋をシールする場合や、開封用つまみ部付き蓋をシールする場合であっても、十分なシール強度が得られ、かつ蓋の外周縁部や開封用つまみ部に焦げが発生することがない。
【００２７】
また、耐熱弾性体の厚みを厚くしても、加熱性能が低下することがないので、耐熱弾性体を厚くすることができ、高周波加熱シールのさいに容器口縁部の凹凸を吸収することが容易となる。
【図面の簡単な説明】
【図１】この発明による容器に対する蓋の高周波加熱シール装置の実施例を示す断面図である。
【図２】蓋の部分拡大断面図である。
【図３】容器の斜視図である。
【符号の説明】
（３） ２次コイル（誘導加熱用コイル）
（３ｃ） 下方突出部
（４） 磁性体
（６） 耐熱弾性体
（７） 蓋
（８） 容器[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heat sealing device for a lid used for high-frequency heat sealing of a lid including a metal foil layer to a glass container or the like.
[0002]
[Prior art]
A ring-shaped induction heating coil that heats a portion of the lid corresponding to the container opening edge, and a heat-resistant elastic body that presses the lid against the container opening edge. 2. Description of the Related Art A device for performing high-frequency heat sealing of a lid on a container by inductively heating an edge-corresponding portion and pressing the lid against the edge of the container with a heat-resistant elastic body has been known (Japanese Patent Publication No. 47-50156). Gazette).
[0003]
It is also known that a magnetic substance for concentrating magnetic flux is arranged in contact with the induction heating coil to increase the heating effect (see Japanese Utility Model Publication No. 60-13767).
[0004]
[Problems to be solved by the invention]
When the lid is sealed to a non-flat sealing surface such as a glass container by the above-described conventional high-frequency heating and sealing device for the container, if the thickness of the heat-resistant elastic body is thin, the container and the lid are brought into close contact with each other when pressurized. Therefore, the thickness of the heat-resistant elastic body is required to be 2 to 3 mm because of poor durability and lack of durability.
[0005]
However, when the thickness of the heat-resistant elastic body is set to be as large as 2 to 3 mm, the distance between the induction heating coil and the lid is increased, so that the magnetic field concentration in the portion to be heated of the lid is weakened, and the necessary heating effect is reduced. You won't get it. Therefore, when sealing a lid larger than the diameter of the container or when sealing a lid with an opening knob, heat is generated along the outer peripheral edge of the lid. In addition, there is a problem that when the heating is performed intensely to obtain a sufficient sealing strength, the amount of heat becomes excessive, and the outer peripheral edge portion of the lid and the opening knob portion are scorched.
[0006]
An object of the present invention is to provide a sufficient sealing strength even when sealing a lid larger than the diameter of a container or a lid with an opening knob, and to provide an outer peripheral portion of the lid or an opening. There is no scorching of the knob, and the thickness of the heat-resistant elastic body can be increased, so that the lid can be heated to a container that provides sufficient sealing performance even for glass containers with an uneven sealing surface. It is to provide a sealing device.
[0007]
[Means for Solving the Problems]
The high-frequency heating and sealing device for a lid of a container according to the present invention concentrates a magnetic flux with a ring-shaped induction heating coil that heats a portion of the lid corresponding to the container edge, a heat-resistant elastic body that presses the lid against the container edge. A high-frequency heating and sealing device for a lid for a container, comprising a magnetic material that increases a heating effect by causing the heat-resistant elastic body to have a ring shape, an inner diameter of which is substantially equal to the container diameter, and a magnetic material having a ring shape or a disk shape. The coil is filled inside the heat-resistant elastic body such that the gap between the magnetic body and the heat-resistant elastic body is at the same level, and the coil fills the gap between the magnetic body and the heat-resistant elastic body. It has an annular downward projection that is substantially flush with each bottom surface of the body.
[0008]
According to the high-frequency heating and sealing device for the lid of the container according to the present invention, the magnetic flux generated when the high-frequency current flows through the induction heating coil is collected by the magnetic material for concentrating magnetic flux, and the portion corresponding to the inside of the lid just inside the container diameter. Is strongly heated. This heat is transmitted to the portion of the lid corresponding to the container edge, that is, the portion of the lid to be sealed, and the portion of the lid corresponding to the container edge is pressed against the heat-resistant elastic body, so that the lid is uniformly heat-sealed.
[0009]
The above-mentioned heating effect is not weakened depending on the heat-resistant elastic body, and the heating performance does not decrease even if the thickness of the heat-resistant elastic body is increased.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
The high-frequency heating and sealing apparatus for a lid for a container shown in FIG. 1 heats and seals a lid (7) including a metal foil layer to an edge (9) of a glass container, and the lid (7) corresponds to the edge of the container. A ring-shaped secondary coil for induction heating (3) that heats the part, a heat-resistant elastic body (6) that presses the lid (7) against the container rim (9), and a magnet that concentrates magnetic flux to increase the heating effect A seal booster (1) having a body (4), and a primary coil (2) disposed above the seal booster (1) so as to be magnetically coupled with the secondary coil (3). The secondary coil (3) has a slit for forming a one-turn coil. The primary coil (2) is built in an insulator such as plastic and fixed above the seal booster (1), and the seal booster (1) is fixed to the primary coil (2).
[0012]
The heat-resistant elastic body (6) is made of silicone rubber, is 3 mm in thickness, and has a rectangular ring-shaped cross section, the inner diameter of which is equal to the diameter of the container (8), and the outer diameter of which is the container edge (9). Is made larger than the outer diameter of
[0013]
The magnetic body (4) is made of ferrite and has a ring shape with a rectangular cross section, and is arranged with a gap inside the heat-resistant elastic body (6). The bottom surface of the magnetic body (4) is at the same level as the bottom surface of the heat-resistant elastic body (6), and its thickness is larger than that of the heat-resistant elastic body (6).
[0014]
The secondary coil (3) has a vertical portion (outside the heat-resistant elastic body (6), whose upper surface is located near the primary coil (2) and whose bottom surface is at the same level as the bottom surface of the heat-resistant elastic body (6). 3a), a horizontal portion (3b) above the heat-resistant elastic body (6) and having an inner peripheral surface in contact with the outer peripheral surface of the magnetic body (4), and a magnetic body protruding downward from the inner peripheral edge of the horizontal portion (3b). An annular downward projection (3c) which fills the gap between (4) and the heat-resistant elastic body (6) and whose bottom surface is flush with the bottom surfaces of the magnetic body (4) and the heat-resistant elastic body (6). If the thickness T of the lower protruding portion (3c) is too large, the inside of the lid (7) unnecessary for sealing is excessively heated. The thickness T of the lower protruding portion (3c) should be determined according to the material composition, dimensions and shape of the container and the lid (7), and a range of 0.5 mm to 2 mm is appropriate. A water cooling pipe (5) is joined to the outside of the vertical portion (3a).
[0015]
The high-frequency heat sealing of the lid (7) including the metal foil layer on the edge (9) of the glass container (8) by the high-frequency heat sealing device according to the present invention is performed as follows.
[0016]
As shown in FIGS. 2 and 3, the lid (7) is provided with an aluminum foil layer (12) having an upper surface coated with a heat-resistant resin (11) and an adhesive layer (13) on the bottom surface thereof. And a high-frequency heating sealing material layer (14) provided with an opening knob (7a).
[0017]
First, a glass container (8) is placed at a predetermined position on a pedestal of an elevating device (not shown) provided below the seal booster (1), and the container (8) is covered with a lid (7). Then, the pedestal of the lifting device is raised, and the lid (7) covered by the container (8) is pressed against the seal booster (1). Here, a high-frequency current is passed through the primary coil (2) for, for example, one second. Then, an induced current flows in the secondary coil (3), and a magnetic field is generated in the secondary coil (3). This magnetic flux is collected by the magnetic material (4) disposed inside the secondary coil (3), and a uniform eddy current is concentrated on the portion of the lid (7) corresponding to the portion inside the bore of the container (8). To be generated. As a result, the portion of the lid (7) corresponding to the portion inside the diameter of the container (8) is heated, and this heat is further transmitted to the portion of the lid (7) corresponding to the edge of the container to be sealed by high-frequency heating, The lid (7) is sealed to the container (8). Cooling is performed, for example, for 0.5 seconds as a cooling time, and the pressure is released to complete the sealing.
[0018]
Since the heat-resistant elastic body (6) made of silicon rubber can be sufficiently deformed by its elasticity, the high-frequency heating sealing material layer (14) of the lid (7) is pressed by the heat-resistant elastic body (6) to form the lid (7). ) Is securely sealed to the container rim (9).
[0019]
For comparison, Table 1 shows the results of comparing the sealing strength between the embodiment of the present invention and the conventional one in which no magnetic material is used. The lid (7) used in this evaluation was provided with a 50 μm aluminum foil layer (12) coated on the upper surface with a heat-resistant resin (11) and an adhesive layer (13) on the bottom surface. An opening knob (7a) having a diameter of 56 mm and a diameter of 5 mm is provided. The outer diameter of the glass container (8) is 52 mm. The seal strength was determined by cutting the lid (7) to a width of 15 mm at the location indicated by the chain line in FIG. 3, that is, at the knob (7a) and at the non-knuckle portions 90, 180 and 270 degrees away from the knob. And a tensile measurement in the 90-degree direction. Table 1 shows the average value of the results of 10 measurements.
[0020]
[Table 1]
Figure 0003572429
As can be seen from Table 1, the embodiment of the present invention has a higher sealing strength than the conventional one, but this difference is particularly large in the opening knob (7a). In the case of the embodiment, the variation due to the difference in the measurement location is very small. In the slit of the secondary coil (3), the lines of magnetic force become zero at the slit portion, which adversely affects the sealing performance. From the above results, the slit of the embodiment of the present invention is affected by the slit. It can also be seen that the lid (7) can be securely sealed to the container rim (9).
[0021]
In the above, ferrite is used as the magnetic material (4). However, other than ferrite, any material having a low magnetic resistance and therefore a high magnetic permeability may be used, and a magnetic material of a metal such as nickel or cobalt can also be used. Further, the shape of the magnetic body (4) is not limited to a ring shape but may be a disk shape. The sizes of the secondary coil (3) and the magnetic body (4) are determined in consideration of the shapes and materials of the lid (7) and the container (8). For the secondary coil (3), a metal having a low specific resistance such as copper, aluminum, or brass is used.
[0022]
The heat-resistant elastic body (6) may be a heat-resistant synthetic rubber film other than silicone rubber or a heat-resistant synthetic resin film such as a polyimide film. The thickness of the heat-resistant elastic body (6) is preferably 1.0 mm or more and 3.0 mm or less. If the thickness of the heat-resistant elastic body (6) is too thin, it is difficult to absorb the unevenness when the unevenness of the container edge (9) is large.
[0023]
The metal foil layer constituting the lid (7) may be a metal foil layer other than the aluminum foil layer (12). In the case of aluminum foil, its thickness is 6 to 100 μm, preferably 20 to 50 μm.
[0024]
In the above embodiment, the high-frequency heating seal of the glass container (8) has been described. However, the device of the present invention can be applied to other containers such as a synthetic resin container.
[0025]
In the above embodiment, the seal booster (1) is fixed to the primary coil (2). However, the seal booster (1) is mounted on the same circumference around the rotation axis of the rotatable rotary pressure plate. The seal booster (1) may be incorporated in a plurality of spaced holes so that the seal booster (1) can move with respect to the primary coil (2). By incorporating the seal booster (1) into the rotary pressure plate, a high-speed, stable and reliable automatic sealing device can be realized.
[0026]
【The invention's effect】
According to the high-frequency heating and sealing device for the lid of the container according to the present invention, the magnetic flux generated when the high-frequency current flows through the induction heating coil is collected by the magnetic material for concentrating magnetic flux, and the portion corresponding to the inside of the lid just inside the container diameter. Is strongly heated. This heat is transmitted to the portion of the lid corresponding to the container edge, that is, the portion of the lid to be sealed, and the portion of the lid corresponding to the container edge is pressed against the heat-resistant elastic body, so that the lid is uniformly heat-sealed. Even when sealing a lid larger than the diameter of the container, or when sealing a lid with an opening knob, sufficient sealing strength can be obtained, and the outer peripheral edge of the lid and the opening knob may be scorched. Does not occur.
[0027]
Also, even if the thickness of the heat-resistant elastic body is increased, the heating performance does not decrease, so that the heat-resistant elastic body can be made thicker, and the irregularities at the edge of the container can be absorbed at the time of the high-frequency heating seal. It will be easier.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of a high-frequency heat sealing device for a lid for a container according to the present invention.
FIG. 2 is a partially enlarged sectional view of a lid.
FIG. 3 is a perspective view of a container.
[Explanation of symbols]
(3) Secondary coil (induction heating coil)
(3c) downward projection (4) magnetic body (6) heat-resistant elastic body (7) lid (8) container

Claims (1)

蓋（７） の容器口縁部対応部分を加熱するリング状の誘導加熱用コイル（３） と、蓋（７） を容器口縁部（９） に押圧する耐熱弾性体（６） と、磁束を集中させて加熱効果を増加させる磁性体（４） とを備えている、容器に対する蓋の高周波加熱シール装置において、耐熱弾性体（６） はリング状で、その内径が容器（８） 口径にほぼ等しく、磁性体（４） はリング状または円盤状で、耐熱弾性体（６） の内側にこれと間隙をおいてかつ底面同士が同レベルとなるように配置され、コイル（３） が、磁性体（４） と耐熱弾性体（６） との間隙を埋めかつその底面が磁性体（４） および耐熱弾性体（６） の各底面とほぼ面一である環状下方突出部（３ｃ）を有していることを特徴とする、容器に対する蓋の高周波加熱シール装置。A ring-shaped induction heating coil (3) for heating a portion of the lid (7) corresponding to the container rim, a heat-resistant elastic body (6) for pressing the lid (7) against the container rim (9), and a magnetic flux A heat-resistant elastic body (6) having a ring shape and an inner diameter corresponding to the diameter of the container (8). Approximately equal, the magnetic body (4) is ring-shaped or disk-shaped, and is disposed inside the heat-resistant elastic body (6) with a gap between them and the bottom surfaces are at the same level. An annular downward projection (3c) which fills the gap between the magnetic body (4) and the heat-resistant elastic body (6) and whose bottom surface is substantially flush with the bottom surfaces of the magnetic body (4) and the heat-resistant elastic body (6). High-frequency heating of the lid to the container, characterized by having Apparatus.
JP23238295A 1995-09-11 1995-09-11 High frequency heating and sealing device for lid to container Expired - Lifetime JP3572429B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23238295A JP3572429B2 (en) 1995-09-11 1995-09-11 High frequency heating and sealing device for lid to container

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Application Number Priority Date Filing Date Title
JP23238295A JP3572429B2 (en) 1995-09-11 1995-09-11 High frequency heating and sealing device for lid to container

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JPH0977006A JPH0977006A (en) 1997-03-25
JP3572429B2 true JP3572429B2 (en) 2004-10-06

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* Cited by examiner, † Cited by third party
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KR100872195B1 (en) * 2007-02-27 2008-12-09 주식회사위너테크 Device for sealing vessel
KR100867218B1 (en) * 2007-02-27 2008-11-06 주식회사위너테크 Device for sealing vessel
JP5845031B2 (en) * 2011-09-22 2016-01-20 東洋製罐株式会社 Manufacturing method of heat seal can
CN108290352B (en) 2015-11-27 2019-12-31 利乐拉瓦尔集团及财务有限公司 Sealing device comprising an injection-moulded magnetic field concentrator
EP3380304A1 (en) 2015-11-27 2018-10-03 Tetra Laval Holdings & Finance S.A. A sealing device with increased robustness
EP3241667B1 (en) 2016-05-02 2020-07-08 Tetra Laval Holdings & Finance S.A. Improved induction sealing system
JP7169997B2 (en) 2017-05-30 2022-11-11 テトラ ラバル ホールディングス アンド ファイナンス エス エイ Apparatus for sealing the top of packages for food products and systems for forming and filling food packages
BR112019025761B1 (en) 2017-07-17 2023-12-26 Tetra Laval Holdings & Finance S.A. INDUCTION COIL FOR WELDING, DEVICE AND SEALING MACHINE, AND, METHOD FOR MANUFACTURING INDUCTION COIL
JP7541479B2 (en) 2017-07-18 2024-08-28 テトラ ラバル ホールディングス アンド ファイナンス エス エイ Induction Sealing Device
JP2022500316A (en) 2018-09-10 2022-01-04 テトラ ラバル ホールディングス アンド ファイナンス エス エイ Methods for forming tubes and methods for forming packages and packaging machines
EP3623301B1 (en) 2018-09-11 2021-07-14 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages
CN113412187B (en) 2019-02-05 2022-12-02 利乐拉瓦尔集团及财务有限公司 Induction heat sealing equipment and method for transversely sealing packaging material pipe

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