DE2225928A1 - Vorrichtung zum verschliessen von behaeltern aus nicht metallischem material mit einer heissklebefaehig beschichteten metallfolie - Google Patents

Vorrichtung zum verschliessen von behaeltern aus nicht metallischem material mit einer heissklebefaehig beschichteten metallfolie

Info

Publication number
DE2225928A1
DE2225928A1 DE2225928A DE2225928A DE2225928A1 DE 2225928 A1 DE2225928 A1 DE 2225928A1 DE 2225928 A DE2225928 A DE 2225928A DE 2225928 A DE2225928 A DE 2225928A DE 2225928 A1 DE2225928 A1 DE 2225928A1
Authority
DE
Germany
Prior art keywords
concentrator
hot
frequency coil
sealing
metallic material
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
DE2225928A
Other languages
English (en)
Inventor
Heinz Autenrieht
Oskar Sohmer
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.)
Robert Bosch Verpackungsmaschinen GmbH
Original Assignee
Robert Bosch Verpackungsmaschinen GmbH
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 Robert Bosch Verpackungsmaschinen GmbH filed Critical Robert Bosch Verpackungsmaschinen GmbH
Priority to DE2225928A priority Critical patent/DE2225928A1/de
Priority to CH545680D priority patent/CH545680A/xx
Priority to FR7319209A priority patent/FR2189184A1/fr
Priority to AT459773A priority patent/AT321771B/de
Publication of DE2225928A1 publication Critical patent/DE2225928A1/de
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3644—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a ribbon, band or strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3668—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special induction coils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—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
    • B29C66/534—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
    • B29C66/72—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
    • B29C66/80—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
    • B29C66/812—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
    • B29C66/8126—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 intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81262—Electrical and dielectric properties, e.g. electrical conductivity
    • B29C66/81263—Dielectric properties
    • 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
    • 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
    • B29C66/818—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
    • B29C66/8187—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 electrical insulating constructional aspects
    • B29C66/81871—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 electrical insulating 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
    • B29C66/83—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Package Closures (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Closing Of Containers (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

R. VM 507
26.5-1972 Gl/Vo
Anlage zur
Patent- und
Gebrauchsmusterhilfsanmeldung
Robert Bosch Verpackungsmaschinen GmbH, 7 Stuttgart
Vorrichtung^zum Verschließen von Behältern aUs, nicht . metallischem Material mit einer heißklebefähig beschichteten Metallfolie
Die Erfindung bezieht sieh auf eine Vorrichtung zum Verschließen von Behältern aus nicht metallischem !Material mit einer heißklebefähig beschichteten Metallfolie mit einem Preßstempel aus isolierendem Material und. einer an diesem befestigten Hochfrequenzspule«
309850/OS96
Robert Bosch
Verpackungsmaschinen GmbH Stuttgart
R. VM 5O7 Gl/Vo
Bei einer beispielsweise durch die deutsche Patentschrift 1 297 520 bekannt gewordenen Vorrichtung dieser Art wird · die auf die Mündung eines Behälters aufgelegte Metallfolie induktiv mit der Hochfrequenzspule gekoppelt, wobei die Metallfolie durch die induzierten, hochfrequenten Wirbelstrom^' erwärmt wird. Die Wärme wird auch auf die Heißklebeschicht übertragen, so daß diese schmilzt und sich mit der Behältermündung verbindet« Mit der bekannten Vorrichtung, werden in der Metallfolie auf ihrem gesamten Flächenbereich Wirbelströme induziert, deren Dichte vom Rand der Folie zii deren Mitte hin abnimmt. Dementsprechend bildet sich in der Folie ein von außen nach innen erstreckendes Wärmegefälle, das insofern vorteilhaft ist, da im Randbe-. "reich der Folie die Heißklebeschicht erschmolzen werden muß. Da aber in diesem Bereich auch ein Teil der erzeugten Wärme in den anliegenden Behälterrana abfließt, baut sich in der Ringzone der Folie nahe dem auf dem Behälterrand aufliegenden Randbereich eine !Temperatur auf, die höher ist als die im Raiidbereieh. Da aus dieser Zone die Wärme nicht abgeleitet wird, entsteht SChUeBIiCh1 bis der Randbereich gerade richtig erhitzt ist, eine Überhitzung der Heißklebeschicht, die insbesondere bei. rascher Erwärmung so hoch sein kann, daß die Heißklebeschicht verbrennt.
8AD OHlQiHAL
3 0 9 8 5 η / 0 5 9 6
Robert Bosch , R-. VM 507 Gl/Vo
Verpackunrrsna schinen GmbH ο 99^Q9P
rt
Der Erfindung liegt die Aufgabe zugrunde, eine Hochfrequenzverschließvorrichtung zu schaffen, mit der eine Überhitzung der Verschlußfolie vermieden wird.
Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß der Hochfrequenzspule ein Konzentrator zugeordnet ist, welcher mit der Hochfrequenzspule induktiv gekoppelt ist und mit dem die Metallfolie induktiv koppelbar ist.
Die Vorrichtung nach*der Erfindung hat den Vorteil, daß, da eine Verbrennung der Heißsiegelschicht ausgeschlossen ist, im Behälter und in dem verpackten Gut kein Verbrennungsgeruch und -geschmack erzeugt werden. Ferner ist durch den Konzentrator eine geringere Induktionsleistung nötig. Außerdem erfolgt nach Abschalten der Hochfrequenz-Erwärmung eine rasche Abkühlung, so daß sich kein Gas- bzxtf. Dampfdruck des Füllgutes aufbauen kann.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und vjird im folgenden näher beschrieben.
Es zeigen:
Fig. 1 einen Siegelstempel und eine zu verschließende Flasche teilweise im Querschnitt und ' '
Fig. 2 eine Pi?inzipskizze über den llomentan-liagnetf eldlinienvorlauf der Vorrichtung nach Fig. 1.
3 0 9 8 5 0/0596 8ΑΣ) ORIGINAL
Robert Bosch - R. TM 507 ' Gl/Vo
VerDaeJ:':nrsvaaschinen GmbH
Eine Flasche 10 aus thermoplastischen Kunststoff, bcispielsvj ei se Polystyrol, mit einem Plansch 11 am C\Cf rrangsrand soll mit einem Plattchen 12 verschlossen werden, das aus einer Aluminiumfolie 13 mit einer Heißklebeschicht.14, beispielsweise einem Heißsiegellack oder einen thermoplastischen Kunststoff, besteht. Das Plättchen 12, dessen Außendurchmesser im wesentlichen gleich dem des Flansches 11 j st, wird ziuG. Verschließen der Flasche 10 mit seiner Heißklebeschicht 14 auf den Flansch 11 aufgelegt. r .
Zum Verschweißen oder Versiegeln des Plättchens 12 nit dem Flansch 11 der Flasche 10 preßt ein Stempel 20 aus isolierendem Material das Plättchen 12 auf den Flansch mit einem gewissen Druck. Der Stempel 20 hat stirnseitir eine zylindrische Aussparung 21, in der eine Induktorschleife 22 und ein Konzentrator 23 eingesetzt sind. Die Induktorschleife 22, die aus einem hohlen, elektrisch leitenden Rechteckprofilmaterial besteht, hat zwei Anschlüsse 24, 25» welche über eine Hochfrequenzleitung 26 mit einem Hochfrequenzgenerator verbunden sind. Die Induktorschleife 22 und die Anschlüsse 24, 25 sind außerdem an einen Kühlwasserkreislauf angeschlossen. Unterhalb der Induktorschleife 22 ist durch eine dünne Isolierschicht 27 getrennt der Konzentrator 23 angeordnet. Dieser
besteht aus einem geschlitzten Ring aus einem- elektrisch .
3 Ü 9 8 5 0 / 0 5 9 P
BAD ORIGINAL
Robert Bosch R. VM 507 Gl/Vo
Verpackungsmaschinen GmbH
Stuttgart '
leitendem Material bzw. Kupfer mit Rechteckquerschnitt. Der Innendurchmesser und der Außendurchmesser der Induktorschleife 22 und des Konzentrators 23 sind im wesentlichen gleich denen des Flansches 11 der Flasche 10. Die der Oberseite des Plättchens zugewandte Unterseite des Konzentrators 23 trägt eine dünne Isolierschicht 28, welche ebenso wie die Isolierschicht 27 zwischen der Induktorschleif e 22 und den Konzentrator 23 aus einen elektrisch schlecht leitendem Stoff, beispielsweise ans einem im Plasraa-Spritzverfahren aufgebrachten Metalloxyd hoher Wärmeleitfähigkeit, besteht. Zum Versiegeln oder Verschweißen des Plättchens 12 mit dem Flansch 11 der Flasche 10 drückt der Stempel "20 das Plättchen 12 auf den Flansch 11. Während dieses Aufpressens wird die Induktorschleife 22 kurzzeitig, beispielsweise xfährend einer halben Sekunde oder kürzer, mit einem hochfrequenten Wechselstrom erregt. Dabei werden durch das wechselnde Induktionsfeld 30, das die Induktorschleife 22 umgibt, im Konzentrator 23 auf dessen radialen Innen--und Außenflächen Ströme hoher Dichte erzeugt, deren Richtung gegensinnig ist. Diese Ströme erzeugen ihrerseits zwei gegensinnige Induktionsfelder 31, 32, deren Feldstärke im mittleren senkrechten Bereich des Konzentrators 23 besonders hoch verdichtet ist. Die beiden
Induktionsfelder 31, 32 des Konzentrators 23 erzeugen in der
309850/0596
Robert Bosch E. VH 507 GI/V9
Verpackungsmaschinen GmbH 2 22 5978
Stuttgart
Aluminiumfolie 13 des Plättchens 12 Wirbelströme, die eine besonders hohe Dichte in Deckungsbereich der Aluminiumfolie 13 des Plättchens 12 mit dem Konzentrator 23 und dem. Flansch 11 haben. Dadurch bildet sich in diesem Bereich der Aluminiumfolie 13 eine relativ hohe Wärmemenge, welche die Heißklebeschicht 14 in diesem Bereich aufschmilzt. Das geschmolzene Material haftet am Plansch 11 der Plasche 10 und erstarrt nach dem Abschalten des Hochfrequenzstromes rasch. Das Erstarren der Schmelze "wird durch die Wasserkühlung der Induktorschleife 22 beschleunigt. Das Kühlwasser führt nämlich die in der Indulrt or schleife 22 und im Konzentrator 23 erzeugte Wärme ab. Bei jedem Erwärmungsvorgang wird auch ia Konzentrator 23 3e nach Werkstoffauswahl und Abmessungen eine bestimmte 'wärmemenge erzeugt. Der größte Teil dieser Wärmemenge wird nach dem Ausschalten des hochfrequenten Stromes sehr rasch durch die dünne Isolierschicht 27 an den einwindigen Induktor 22 und der restliche Teil an das Plättchen 12 abgegeben.
Ansprüche:
309850/0596 SAD

Claims (5)

An s ρ r üc h _e
1.J Vorrichtung zum Verschließen von Behältern aus nicht netallischein Material mit einer heißklebefähig beschichteten Metallfolie "mit einem-Preß s temp el aus isolierendem Material und einer an diesen befestigten Hoch frequenzspule, dadurch gekennzeichnet, daß der Hochfrequenzspule (22) ein Konzentrator (23) zugeordnet ist, welcher mit der Hochfrecjuenzsp\ile (22) induktiv gekoppelt ist und mit dem die Metallfolie induktiv koppel bar ist.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Konzentrator (23) aus einera geschlitzten Metallring besteht.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Konzentrator (23) die gleiche Weite' hat wie die Hochfrequenzspule (22) und axial neben dieser auf der Stempelstirnseite angeordnet ist.
4. Vorrichtung nach Anspruch 3» dadurch gekennzeichnet, daß der Konzentrator (23) durch je eine dünne Isolierschicht (27j 28) von der Hochfrequenzspule (22) und von der Metallfolie (12) getrennt ist. · .<
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Isolierschichten (2?» 28) aus einem Metalloxyd bestehen
3 0 9850/0535
BAD
Leerseite
DE2225928A 1972-05-27 1972-05-27 Vorrichtung zum verschliessen von behaeltern aus nicht metallischem material mit einer heissklebefaehig beschichteten metallfolie Pending DE2225928A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE2225928A DE2225928A1 (de) 1972-05-27 1972-05-27 Vorrichtung zum verschliessen von behaeltern aus nicht metallischem material mit einer heissklebefaehig beschichteten metallfolie
CH545680D CH545680A (de) 1972-05-27 1973-05-18
FR7319209A FR2189184A1 (en) 1972-05-27 1973-05-25 Heat sealing die - for non metal containers with thermoplastic coated metal foil caps
AT459773A AT321771B (de) 1972-05-27 1973-05-25 Vorrichtung zum Verschließen von Behältern aus nicht metallischem Material mit einer heißklebefähig beschichteten Metallfolie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2225928A DE2225928A1 (de) 1972-05-27 1972-05-27 Vorrichtung zum verschliessen von behaeltern aus nicht metallischem material mit einer heissklebefaehig beschichteten metallfolie

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DE2225928A1 true DE2225928A1 (de) 1973-12-13

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DE2225928A Pending DE2225928A1 (de) 1972-05-27 1972-05-27 Vorrichtung zum verschliessen von behaeltern aus nicht metallischem material mit einer heissklebefaehig beschichteten metallfolie

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AT (1) AT321771B (de)
CH (1) CH545680A (de)
DE (1) DE2225928A1 (de)
FR (1) FR2189184A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2825953A1 (de) * 1977-06-20 1979-01-04 Akerlund & Rausing Ab Vorrichtung zum induktionsschweissen
DE3032118A1 (de) * 1980-08-26 1982-03-04 AISA Automation Industriella S.A., Vouvry Matrizenschweissspule

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4693391A (en) * 1986-10-23 1987-09-15 Continental Can Company, Inc. Closure having a pull tab and a controlled seal width at the pull tab

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2825953A1 (de) * 1977-06-20 1979-01-04 Akerlund & Rausing Ab Vorrichtung zum induktionsschweissen
DE3032118A1 (de) * 1980-08-26 1982-03-04 AISA Automation Industriella S.A., Vouvry Matrizenschweissspule

Also Published As

Publication number Publication date
FR2189184B3 (de) 1976-05-21
CH545680A (de) 1974-02-15
AT321771B (de) 1975-04-25
FR2189184A1 (en) 1974-01-25

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