JPH05221405A - 容器に対する蓋のヒートシール装置 - Google Patents

容器に対する蓋のヒートシール装置

Info

Publication number
JPH05221405A
JPH05221405A JP4016502A JP1650292A JPH05221405A JP H05221405 A JPH05221405 A JP H05221405A JP 4016502 A JP4016502 A JP 4016502A JP 1650292 A JP1650292 A JP 1650292A JP H05221405 A JPH05221405 A JP H05221405A
Authority
JP
Japan
Prior art keywords
lid
container
heat
heat sealing
pressing member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4016502A
Other languages
English (en)
Inventor
Giichi Yasuda
義一 安田
Ryota Chikasawa
亮太 近沢
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.)
Showa Aluminum Can Corp
Original Assignee
Showa Aluminum Corp
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 Showa Aluminum Corp filed Critical Showa Aluminum Corp
Priority to JP4016502A priority Critical patent/JPH05221405A/ja
Publication of JPH05221405A publication Critical patent/JPH05221405A/ja
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—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
    • 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
    • B29C66/70—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
    • 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
    • B29C66/812—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
    • B29C66/81—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
    • B29C66/83—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages

Abstract

(57)【要約】 【目的】 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容器に対する
蓋のヒートシール装置を提供する。 【構成】 ヒートシール装置の押圧部材１には、蓋７が
ヒートシールされる容器口縁部９に対応するように形成
されたリング状の誘導加熱用コイル２が、内蔵されてい
る。押圧部材１下端部のコイル２に対応する位置には、
容器８口縁部に対応するように形成された銅製リング３
が配置され、銅製リング３を内外両側からはさむよう
に、フェライト製磁束集中体４，５が配置されている。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明は、金属箔層を含んだ蓋
をガラス容器等にヒートシールするための容器に対する
蓋のヒートシール装置に関する。
【０００２】
【従来の技術】リング状の誘導加熱用コイルが内蔵され
た押圧部材を有する、容器に対する蓋のヒートシール装
置は従来より知られている。
【０００３】
【発明が解決しようとする課題】上記従来の容器に対す
る蓋のヒートシール装置では、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
る場合には、蓋の外周縁部や開封用つまみ部にも熱が吸
収されるため、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。
【０００４】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
ない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。
【０００５】
【課題を解決するための手段】この発明による容器に対
する蓋のヒートシール装置は、容器口縁部に対応するよ
うに形成されたリング状誘導加熱用コイルが内蔵された
押圧部材を有する、容器に対する蓋のヒートシール装置
において、押圧部材下端部のコイル下方に、容器口縁部
に対応するように形成された金属製リングが配置され、
金属製リングを内外両側からはさむように、金属製リン
グの透磁率よりも大きい透磁率を有する材料よりなる磁
束集中体が配置されていることを特徴とするものであ
る。
【０００６】ここで、金属製リングとしては、銅、アル
ミニウムなどの金属が使用され、金属製リングよりも大
きい透磁率を有する材料としては、フェライト、ニッケ
ル、コバルトなどの磁性体が使用される。
【０００７】
【作用】この発明による容器に対する蓋のヒートシール
装置は、押圧部材に、容器口縁部に対応するように形成
されたリング状誘導加熱用コイルが内蔵されており、押
圧部材下端部のコイル下方に、容器口縁部に対応するよ
うに形成された金属製リングが配置され、金属製リング
を内外両側からはさむように、金属製リングの透磁率よ
りも大きい透磁率を有する材料よりなる磁束集中体が配
置されているので、金属箔層を含んだ蓋をガラス容器等
にヒートシールするためコイルに高周波電流を流すと、
生じた磁束は金属製リングを透過し、蓋の容器口縁部対
応部分が加熱される。このさい、金属製リングを透過す
る以外の磁束は、磁束集中体により吸収されるので、蓋
の容器口縁部対応部分のヒートシールされるべき部分だ
けが加熱される。
【０００８】
【実施例】この発明の実施例を、以下図面を参照して説
明する。
【０００９】図１に示す容器に対する蓋のヒートシール
装置は、金属箔層を含んだ蓋(7) をガラス容器口縁部
(9) にヒートシールするものであって、蓋(7) がヒート
シールされる容器口縁部(9) に対応するように形成され
たリング状の誘導加熱用コイル(2) が、押圧部材(1) に
内蔵されている。
【００１０】押圧部材(1) 下端部のコイル(2) に対応す
る位置に、容器(8) 口縁部に対応するように形成された
銅製リング(3) が配置され、銅製リング(3) を内外両側
からはさむように、フェライト製磁束集中体(4)(5)が配
置されている。内側の磁束集中体(4) は円板状、外側の
磁束集中体(5) はリング状になされている。
【００１１】押圧部材(1) の下面には、銅製リング(3)
および磁束集中体(4)(5)を覆うように、ポリイミドフィ
ルムよりなる弾性体層(6) が設けられている。
【００１２】この発明による上記ヒートシール装置によ
りガラス容器(8) の口縁部(9) に金属箔層を含んだ蓋
(7) をヒートシールするには、次のようにして行う。
【００１３】蓋(7) は、アルミニウム箔層とこれの下面
に設けられたヒートシール材層とによって構成されてい
る。
【００１４】まず押圧部材(1) の下方所定位置にガラス
容器(8) を配置し、この容器(8) の口に蓋(7) を被せ
る。ついで押圧部材(1) を降下させ、容器(8) の口に被
せられた蓋(7) に対して押圧部材(1) を例えば１．５秒
間押し付けるとともに、誘導加熱用コイル(2) に高周波
電流を流して、蓋(7) の容器口縁部(9) 対応部分を例え
ば２４０℃に加熱し、容器口縁部(9) に蓋(7) をヒート
シールする。
【００１５】ここで、コイル(2) に高周波電流を流すこ
とにより生じた磁束のうち、銅製リング(3) を透過する
以外の磁束は、磁束集中体(4)(5)により吸収され、蓋
(7) は、容器口縁部(9) 対応部分のヒートシールされる
べき部分だけが加熱される。また、ポリイミドフィルム
よりなる弾性体層(6) はその弾性により変形可能である
ため、蓋(7) のヒートシール材層が押圧部材(1) 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。
【００１６】比較のため、本発明の実施例のものと、従
来の磁束集中体が使用されていないものとについて、シ
ール強度を比較した結果を表１に示す。この評価に使用
された装置の銅製リング(3) の高さは３ｍｍで、磁束集
中体(4)(5)としてはフェライトが使用されその高さはい
ずれも１０ｍｍである。また使用された蓋(7) は、図２
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５０μｍのアルミニウム箔層(12)と、これの下面に
接着剤層(13)を介して設けられた５０μｍのヒートシー
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測定した。
【００１７】
【表１】 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。なお、焦げは、実施例のものにも従来の
ものにも発生していない。
【００１８】上記において、磁束集中体(4)(5)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。銅製リング(3) および磁束集中体(4)(5)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。
【００１９】また、弾性体層(6) は、ポリイミドフィル
ム以外の耐熱合成樹脂フィルムやシリコーンラバー等の
耐熱合成ゴムであってもよい。弾性体層(6) の厚みは、
０．０１ｍｍ以上で１．０ｍｍ以下が好ましい。
【００２０】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。
【００２１】また上記実施例においては、ガラス容器
(8) のヒート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。
【００２２】
【発明の効果】この発明の容器に対する蓋のヒートシー
ル装置によると、蓋の容器口縁部対応部分のヒートシー
ルされるべき部分だけが加熱されるので、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。
【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ヒートシール
装置の実施例を示す部分拡大断面図である。
【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】
(1) 押圧部材 (2) 誘導加熱用コイル (3) 金属製リング (4)(5) 磁束集中体 (7) 蓋 (8) 容器

Claims (1)

    【特許請求の範囲】
  1. 【請求項１】 容器口縁部に対応するように形成された
    リング状誘導加熱用コイルが内蔵された押圧部材を有す
    る、容器に対する蓋のヒートシール装置において、押圧
    部材下端部のコイルに対応する位置に、容器口縁部に対
    応するように形成された金属製リングが配置され、金属
    製リングを内外両側からはさむように、金属製リングの
    透磁率よりも大きい透磁率を有する材料よりなる磁束集
    中体が配置されていることを特徴とする、容器に対する
    蓋のヒートシール装置。
JP4016502A 1992-01-31 1992-01-31 容器に対する蓋のヒートシール装置 Pending JPH05221405A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4016502A JPH05221405A (ja) 1992-01-31 1992-01-31 容器に対する蓋のヒートシール装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4016502A JPH05221405A (ja) 1992-01-31 1992-01-31 容器に対する蓋のヒートシール装置

Publications (1)

Publication Number Publication Date
JPH05221405A true JPH05221405A (ja) 1993-08-31

Family

ID=11918052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4016502A Pending JPH05221405A (ja) 1992-01-31 1992-01-31 容器に対する蓋のヒートシール装置

Country Status (1)

Country Link
JP (1) JPH05221405A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100107568A1 (en) * 2007-04-11 2010-05-06 Toyo Seikan Kaisha Ltd. Method and apparatus for heat-sealing container
JP2018536595A (ja) * 2015-11-27 2018-12-13 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 射出成形された磁場コンセントレータを備えたシーリング装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100107568A1 (en) * 2007-04-11 2010-05-06 Toyo Seikan Kaisha Ltd. Method and apparatus for heat-sealing container
JP2018536595A (ja) * 2015-11-27 2018-12-13 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 射出成形された磁場コンセントレータを備えたシーリング装置

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