JPWO2002072426A1 - 容器超音波シール方法 - Google Patents

容器超音波シール方法 Download PDF

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Publication number
JPWO2002072426A1
JPWO2002072426A1 JP2002571358A JP2002571358A JPWO2002072426A1 JP WO2002072426 A1 JPWO2002072426 A1 JP WO2002072426A1 JP 2002571358 A JP2002571358 A JP 2002571358A JP 2002571358 A JP2002571358 A JP 2002571358A JP WO2002072426 A1 JPWO2002072426 A1 JP WO2002072426A1
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Japan
Prior art keywords
container
sealing
ultrasonic
sealed
lid
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JP2002571358A
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English (en)
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JP4206496B2 (ja
Inventor
篠原　光彦
光彦 篠原
植田　道雄
道雄 植田
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Shikoku Kakoki Co Ltd
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Shikoku Kakoki Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B3/00—Closing bottles, jars or similar containers by applying caps
    • B67B3/02—Closing bottles, jars or similar containers by applying caps by applying flanged caps, e.g. crown caps, and securing by deformation of flanges
    • 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
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/081—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations having a component of vibration not perpendicular to the welding surface
    • B29C65/082—Angular, i.e. torsional ultrasonic welding
    • 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
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • 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
    • B29C66/50—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
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5324—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
    • B29C66/53245—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow
    • B29C66/53246—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers
    • B29C66/53247—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers said spouts comprising flanges
    • 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
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow 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
    • B29C66/50—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
    • B29C66/61—Joining from or joining on the inside
    • 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
    • B29C66/63—Internally supporting the article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—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
    • B29C66/8141—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • 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
    • B29C66/8141—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
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    • 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
    • B29C66/8141—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • 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
    • B29C66/8141—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/22—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
    • B65B51/225—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding by ultrasonic welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/2878—Securing closures on containers by heat-sealing
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    • B29C66/824—Actuating mechanisms
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S53/00—Package making
    • Y10S53/02—High frequency electric sealing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1008—Longitudinal bending
    • Y10T156/1013—Longitudinal bending and edge-joining of one piece blank to form tube

Abstract

シール作用面５３を有する超音波ホーン５４を用いて、容器本体１１に蓋１２をシールする容器超音波シール方法は、容器本体フランジ２４および蓋１２の外周縁部を重ね合わせた状態で、その重合せ部をシール作用面５３で加圧し、シール作用面５３に、加圧方向と平行する軸を中心とする回転方向の超音波回転振動を作用させるものである。

Description

技術分野
この発明は、例えば、容器本体に、蓋、口栓、その他の容器構成部品を、超音波シール装置を用いてシールする容器超音波シール方法に関する。
背景技術
この種の容器超音波シール方法としては、シール作用面を有する超音波ホーンを用いて、容器本体に容器構成部品をシールする方法であって、容器本体および容器構成部品の被シール部同士を重ね合わせた状態で、同被シール部をシール作用面で加圧し、シール作用面に、加圧方向と平行する軸方向の超音波往復振動を作用させるものが知られている。
また、超音波シール装置を用いない別のシール方法としては、高周波誘導シール、高周波誘電シール、熱板によるヒートシール等も知られている。
超音波ホーンに加えられる超音波往復振動は、容器の被シール面を叩くように作用するため、これが容器の壁を伝わったり、容器内ヘッドスペースを伝わったりして、容器の内容物を振動させる。そうすると、内容物が破壊されたり、内容物が液体の場合、激しい液揺れを起こしたり、条件によっては霧化することにより、シール時に、内容物が噴出することがあった。これを防止するためには、容器内ヘッドスペースを多くとる必要があった。
また、良好なシールを得るための条件が狭く制限され、シール条件が満たされないと、容器構成部品の薄肉部が破壊されたり、シール部等に、ピンホールが発生することになる。
さらに、シール作用面に、軸方向の超音波往復振動を作用させてシールを行う場合、大きな加圧力を必要とした。そのため、座屈強度の小さい容器には不適であった。また、大きな加圧力は、シール部の近傍で受ける必要があった。そのため、容器本体の口縁部に、加圧力を受けるためのフランジを必要としたり、容器本体の口縁部をスカート付のキャップ状蓋で被覆しようとしても、フランジで加圧力を受ける際に、スカートが邪魔になるため、キャップにスカートを形成することができない等、容器および蓋のデザイン上制限があった。
強度の小さい容器やスカート付蓋をシールする場合、超音波シールを採用することができないため、高周波誘導シールまたは高周波誘電シールを採用することがあったが、高周波誘導シールを採用する場合、シール部にアルミその他の高周波誘導可能な材質を用いたり、高周波誘電シールを採用する場合、高周波誘電シール可能な材質を用いる必要があり、容器および蓋の材質に制限があり、リサイクル上問題があった。
また、ヒートシールによる場合、シール時間が掛かるため効率的でなかった。とくに、容器および蓋の厚さが大きいと、ヒートシールは不可能であった。
この発明は、上記の課題を全て解決し、シール時に内容物に悪影響を及ぼすことがなく、シール条件を広く設定することができ、しかも、効率的にシールを行うことのできる容器超音波シール方法を提供することを目的とするものである。
発明の開示
この発明による容器超音波シール方法は、シール作用面を有する超音波ホーンを用いて、容器本体に容器構成部品をシールする方法であって、容器本体および容器構成部品の被シール部同士を重ね合わせた状態で、同被シール部をシール作用面で加圧し、シール作用面に、加圧方向と平行する軸を中心とする回転方向の超音波回転振動を作用させるものである。
この発明による容器超音波シール方法では、シール作用面に作用させられる超音波回転振動は、容器の壁を叩くように作用するのではなくて、容器の壁にそう方向に作用する。このため、シール時に内容物に悪影響を及ぼすことがない。さらに、加圧力は小さくて良い。しかも、容器の薄肉化につながり、省資源、コスト低減というメリットを生むことになる。また、容器本体および容器構成部品の材質を問わない。そのため、アルミニウムを含まない材質で容器本体および蓋を製造することにより、リサイクルが容易となる。
さらに、超音波回転振動以外の超音波振動を複合させてシール作用面に作用させると、超音波の複合振動を利用することにより、効率の良いシールを行うことができる。
また、あらかじめ、シール作用面に、シール条件改善用凹凸を形成しておくと、シール条件を広く設定することができる。
また、容器本体が、被シール部を形成するフランジを口縁部に有しており、容器構成部品が、容器本体の口縁部に被せられかつ被シール部を形成する外周縁部にスカートを有するキャップ状のものであってもよい。
また、超音波ホーンの加圧力を容器本体の底部で受けるようにすると、シール時の容器の取扱いが簡単になる。
発明を実施するための最良の形態
この発明の実施の形態を図面を参照してつぎに説明する。
図１を参照すると、容器は、容器本体１１および蓋１２よりなる。容器本体１１および蓋１２は、いずれも、同じ種類の熱可塑性合成樹脂によって成型されたものである。熱可塑性合成樹脂の例としては、ＰＳ、ＰＰ、ＰＥ、ＰＥＴ、ＰＥＮ等またはそれらを複合したものが挙げられる。
容器本体１１は、ボトル状のもので、有底筒状胴部２１を有している。胴部２１の上端には口部２３が設けられるとともに、その縁部にフランジ２４が設けられている。
蓋１２は、浅いキャップ状のもので、外周縁部にそってのびた横断面略コの字状の下向き環状嵌合凹部３１と、嵌合凹部３１の内側壁下端に連なる平板状ウェッブ部３２と、嵌合凹部３１の外壁を延長するように設けられているスカート３３と、スカート３３の外周面の下端の一部に連なるつまみ３４とよりなる。
フランジ２４に嵌合凹部３１がはめ被せられ、フランジ２４頂面と嵌合凹部３１底面が重ね合わされてシールされている。シールは、超音波シールによるものである。
図２を参照すると、容器ホルダ４１と、容器ホルダ４１の上方に垂直下向きに配置されている超音波シール装置４２とが示されている。
容器ホルダ４１は、圧縮コイルばね４３を介して水平昇降板４４によって支持されている。超音波シール装置４２は、支持体５１に取付けられているシール装置本体５２と、シール装置本体５２から下方に突出させられかつ下端に下向きシール作用面５３を有する丸棒状ホーン５４とよりなる。シール装置本体５２には図示しない振動子が内蔵されている。振動子によって、図２中矢印で示すように、ホーン５４のシール作用面５３にはその軸を中心とする回転方向の超音波回転振動が作用させられる。
シール作用面５３の中央には窪み６１が形成されるとともに、窪み６１の周囲には凹凸６２が形成されている。凹凸６２の例としては、図３に示すように、シール作用面５３に２方向にのびた交差溝７１を形成することにより、設けられたもの、図４に示すように、シール作用面５３に１方向にのびた平行溝７２を形成することにより、設けられたもの、図５に示すように、シール作用面５３に半径方向にのびた放射溝７３を形成することにより、設けられたものが挙げられる。
このような凹凸６２を形成することにより、シール条件が改善される。シール条件とは、例えば、超音波の振幅や発振時間、シール時の加圧力やその保持時間等々であり、これらの範囲を広く設定できる。
容器ホルダ４１によって容器本体１１の底部を受けている状態で、昇降板４４を上昇させ、ばね４３を圧縮させると、ばね力によって、シール作用面５３がフランジ２４および嵌合凹部３１を加圧する。振動子によってホーン５４に超音波回転振動が加えられると、フランジ２４頂面と嵌合凹部３１底面とがシールされる。
加圧手段はばね力以外でもよい。例えば、流体圧シリンダ等をホーン側に設けても良い。
つぎに、上記容器とは別の形態の容器をシールする場合について、以下に様々なバリエーションを説明する。
図６に示す容器は、カップ状容器本体８１およびドーム状蓋８２よりなる。容器本体８１の口縁部にはフランジ８３が設けられている。蓋８２の下縁部にはフランジ８４が設けられ、これが、容器本体フランジ８３に重ね合わされている。蓋８２の頂部には注出口部（図示しない）が設けられ、これにはキャップ８５がはめ被せられている。
容器本体８１が容器ホルダ４１の容器保持孔にはめ入れられてそのフランジ８３が容器ホルダ４１上面の容器保持孔縁部で受けられている。
シール作用面５３の窪み６１は、蓋８２のほぼ全体を収容しうる大きさとなされている。窪み６１の縁部が容器本体８１および蓋８２の双方のフランジ８３、８４を加圧し、この状態で、ホーン５４に超音波回転振動が加えられるようになっている。
この場合において、シール時の加圧力は、超音波シール装置４２に設けられた加圧手段、例えば、図示しない流体圧シリンダによって作用させられる。
図７には、ゲーブルトップ型容器本体９１の頂部に設けられた注出口（図示しない）の縁部外面に、キャップ付口栓９２のフランジ９３下面をシールする場合が示されている。
容器本体９１の底部は、固定状に支持されている容器ホルダ４１によって受けられている。
図８には、ゲーブルトップ型容器本体１０１の頂部に、これを閉鎖する前に、口栓１０２を取付る場合を示している。口栓１０２は、容器本体１０１の内側から注出口１０３にはめ入れられそのフランジ１０４を注出口１０３縁部内面に当接させている。フランジ１０４および注出口１０３縁部を、超音波シール装置４２のホーン５４およびアンビル１１１で挟み付けて加圧し、この状態で超音波が発振される。
この場合において、図６に示す場合と同様に、超音波シール装置４２には加圧力を作用させるための加圧手段が備えられている。
図９は、ブリック型容器本体１２１の頂部に口栓１２２をシールする場合を示している。超音波シール装置４２のホーン５４および容器ホルダ４１によって、容器本体１２１および口栓フランジ１２３を上下から挟み付けるようになっている。
上記した例は、いずれも、被シール部に超音波回転振動を作用させる場合を示している。超音波振動としては、超音波回転振動の他に、ホーン軸方向と平行する超音波往復縦振動、ホーン軸方向と直交する超音波往復横振動およびこれらの縦振動および横振動の組合わせよりなる斜め振動も知られている。シール条件を左右する容器素材次第によっては、超音波回転振動に加えて、上記した超音波振動を含めた他の超音波の複合振動を利用することも有効である。
産業上の利用可能性
この発明による容器超音波シール方法は、例えば、容器本体に、蓋、口栓、その他の容器構成部品を、超音波シール装置を用いてシールするのに適している。
【図面の簡単な説明】
図１は、この発明方法によりシールされた容器本体および蓋の分解斜視図である。
図２は、この発明方法を実施するためのシール装置によるシール状態説明図である。
図３は、同シール装置のホーン先端シール作用面の拡大図である。
図４は、同シール作用面の他の例を示す図３相当の拡大図である。
図５は、同シール作用面のさらなる他の例を示す図３相当の拡大図である。
図６は、他の形態による容器のシール状態説明図である。
図７は、さらなる他の形態による容器のシール状態説明図である。
図８は、さらなる他の形態による容器のシール状態説明図である。
図９は、さらなる他の形態による容器のシール状態説明図である。

Claims (5)

  1. シール作用面を有する超音波ホーンを用いて、容器本体に容器構成部品をシールする方法であって、容器本体および容器構成部品の被シール部同士を重ね合わせた状態で、同被シール部をシール作用面で加圧し、シール作用面に、加圧方向と平行する軸を中心とする回転方向の超音波回転振動を作用させる容器超音波シール方法。
  2. シール作用面に、超音波回転振動以外の超音波振動を複合させて作用させる請求項１に記載の容器超音波シール方法。
  3. あらかじめ、シール作用面に、シール条件改善用凹凸を形成しておく請求項１または２に記載の容器超音波シール方法。
  4. 容器本体が、被シール部を形成するフランジを口縁部に有しており、容器構成部品が、容器本体の口縁部に被せられかつ被シール部を形成する外周縁部にスカートを有するキャップ状のものである請求項１〜３のいずれか１つに記載の容器超音波シール方法。
  5. 超音波ホーンの加圧力を容器本体の底部で受ける請求項１〜４のいずれか１つに記載の容器超音波シール方法。
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CN1282588C (zh) 2006-11-01
EP1410988B1 (en) 2008-11-19
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EP1410988A1 (en) 2004-04-21
DE60229948D1 (de) 2009-01-02
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HK1065520A1 (en) 2005-02-25
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ATE414649T1 (de) 2008-12-15
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