SE465214B - Saett att uppvaerma del av loepande materialbana - Google Patents

Saett att uppvaerma del av loepande materialbana

Info

Publication number
SE465214B
SE465214B SE9000154A SE9000154A SE465214B SE 465214 B SE465214 B SE 465214B SE 9000154 A SE9000154 A SE 9000154A SE 9000154 A SE9000154 A SE 9000154A SE 465214 B SE465214 B SE 465214B
Authority
SE
Sweden
Prior art keywords
heating
thermoplastic
web
edge
area
Prior art date
Application number
SE9000154A
Other languages
English (en)
Other versions
SE9000154A (sv
SE9000154D0 (sv
Inventor
J F Loevenbrant
T Kjelgaard
Original Assignee
Tetra Pak Holdings Sa
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
Publication of SE9000154D0 publication Critical patent/SE9000154D0/sv
Priority to SE9000154A priority Critical patent/SE465214B/sv
Application filed by Tetra Pak Holdings Sa filed Critical Tetra Pak Holdings Sa
Priority to EP19900125647 priority patent/EP0437847B1/en
Priority to DK90125647T priority patent/DK0437847T3/da
Priority to ES90125647T priority patent/ES2047814T3/es
Priority to DE90125647T priority patent/DE69004945T2/de
Priority to AT90125647T priority patent/ATE97855T1/de
Priority to US07/637,553 priority patent/US5113479A/en
Priority to KR1019910000255A priority patent/KR960013933B1/ko
Priority to HU18/91A priority patent/HU218369B/hu
Priority to AU69365/91A priority patent/AU639290B2/en
Priority to CA 2034218 priority patent/CA2034218C/en
Priority to CS9172A priority patent/CZ279662B6/cs
Priority to YU5391A priority patent/YU48001B/sh
Priority to JP321891A priority patent/JP2889710B2/ja
Publication of SE9000154A publication Critical patent/SE9000154A/xx
Publication of SE465214B publication Critical patent/SE465214B/sv

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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/0044—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping edges or extremities
    • 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
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/0266—Local curing
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/10—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation for articles of indefinite length
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1477—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier
    • B29C65/1483—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier coated on the article
    • 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • 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
    • B29C66/72327—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 natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1432—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface direct heating of the surfaces to be joined
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1464—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • 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
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12—Paper, e.g. cardboard
    • B29K2711/123—Coated

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Thermal Sciences (AREA)
  • Toxicology (AREA)
  • Electromagnetism (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Laminated Bodies (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Paper (AREA)
  • Making Paper Articles (AREA)
  • Cell Separators (AREA)
  • Heat Treatment Of Articles (AREA)
  • Wrappers (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Package Closures (AREA)
  • Wire Processing (AREA)
  • Resistance Heating (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Description

465 214 Man har hittills uppvärmt kanten på den löpande materialbanan inför omvikningen med varmluft. Man riktar en varmluftsstråle från ett varmluftsmunstycke, mot den löpande materialbanans kant. Härvid får man en spridd uppvärmning som är svår att avgränsa. Förutom laminatskanten värmes också termoplast- 13 kanten och detta medför att den blir mjuk och svårhanterlig i en därefter följande omvikning. Framför allt då termoplast- » kanten är laminerad med aluminiumfolie, då en uppvärmning av kanten kan medföra sprickbildning och veckbildning i den tunna aluminiumfolien och man får en kantomvikning som inte är helt gastät, vilket i sin tur kan förorsaka osterilitet vid aseptisk förpackning. Den efterföljande omvikningen kan ske med en serie rullar med olika lutning alternativt med en rem som viker om kanten.
Ett ändamål med föreliggande uppfinning är att åstadkomma ett sätt att uppvärma en begränsad del av en löpande materialbana utan att intilliggande delar av förpackningsmate- rialbanan påverkas av värmen.
Detta och andra ändamål har enligt uppfinningen uppnåtts genom att sättet av den inledningsvis beskrivna typen getts kännetecknen av att termoplastlaminatet utgöres av en löpande materialbana, där längs ena sidan i materialbanans längs- riktning, ett begränsat område uppvärmes och där utanför detta begränsade område finns en utskjutande termoplastkant som efter uppvärmningen vikes över det uppvärmda området.
En föredragen utföringsform av uppfinningen kommer nu närmare att beskrivas med hänvisning till bifogade ritningar av vilka: Fig. 1 schematiskt visar hur en IR lampa riktas mot en löpande materialbana Fig. 2 schematiskt visar en del av den löpande materialbanan.
Ritningarna visar endast de för förståelsen av uppfinningen väsentliga detaljerna.
I fig. 1 visas en IR-lampa 1 alternativt ett aggregat av seriekopplade IR-lampor, försett med en konventionell reflektorskärm 2. Reflektorn 2 har ett bestämt avstånd till en brännpunkt 3, dit strålningen koncentreras. Genom att placera IR-lampan 1 med reflektorn 2 på ett visst avstånd från en löpande materialbana 4 får man brännpunkten 3 på avståndet A 465 214, framför materialbanan 4. Detta medför att strålningen bakom brännpunkten 3 sprides på bredden B på förpackningsmaterial- banan 4. Ökar man avståndet A ökar bredden B och tvärtom. B utgör således det begränsade område 7 på förpackningsmate- rialet som uppvärmes.
Antalet IR-lampor 1 som seriekopplas beror på den hastighet varmed banan 4 framföres, så att ju högre hastighet varmed man framför banan 4 desto större antal seriekopplade lampor l erfordras för att uppnå önskad effekt.
I fig. 1 visas också den från den löpande materialbanan utskjutande termoplastkanten 5 eventuellt laminerad med aluminiumfolie.
Då den löpande materialbanan 4 passerar IR-lampan 1 eller de till ett aggregat seriekopplade IR-lamporna, värmes den löpande materialbanans 4 termoplastyta till en temperatur som motsvarar termoplastens smältpunkt på ett begränsat område 7 strax innanför den utskjutande kanten 5. Det begränsade uppvärmningsområdet 7 utgöres då av en zon som sträcker sig utmed kanten på den löpande materialbanan 4 i banans 4 rörelseriktning.
Då man på detta sätt begränsar uppvärmningen påverkas inte kanten 5 utan i en därpå följande omvikningsprocess kan kanten som är ouppvärmd och lätthanterlig, omvikas med t.ex. rullar eller rem och förseglas mot en löpande materialbana 4 med en jämn och slät försegling utan risk för att den aluminiumfolie som eventuellt vidhäftar termoplasten spricker eller skrynklas.
I fig. 2 visas en del av den löpande materialbanan 4 där det område 7 som skall uppvärmas innan omvikningen, har fått en förtryckt färgrand 6. Denna färgrand 6 påtryckes lämpligen den löpande materialbanan 4 i en tidigare tryckprocess då förpack- ningsmaterialet får sin dekor. Färgranden 6 består av en mörk, mättad färg företrädesvis svart, matt färg. IR-lampan 1 väljes med en våglängd, speciellt anpassad för svart färg.
Färgranden 6 kommer då den utsätts för uppvärmningen från IR-lampan 1 att absorbera värmen och praktiska försök har gett vid handen att detta förfarande kan minska effektbehovet vid uppvärmningen med 50 %. 465 214 Färgranden 6 bidrar också till koncentrationen av värme- strålningen, så att obetydlig värme sprides utanför färgranden 6. fii Som framgått av ovanstående beskrivning åstadkommes med föreliggande uppfinning ett sätt att uppvärma en begränsad del Ä av en löpande materialbana, utan att övriga delar av banan, framförallt termoplastkanten påverkas av värmen, med följande negativa konsekvenser för den därpå följande omvikningen.

Claims (3)

PATENTKRAV
1. Sätt att uppvärma med infrarött ljus, med hjälp av en IR-lampa eller ett aggregat av lampor, försedda med stràlningskoncentrerade reflektorer, som får uppvärma en termoplastyta belägen på ett med termoplast laminerat pappers- eller kartongskikt, k ä n n e t e c k n a t d ä r a v att termoplastlaminatet utgöres av en löpande materialbana, där längs ena sidan, i materialbanans längsriktning, ett begränsat omrâde uppvärmes och där utanför detta begränsade område finns en utskjutande termoplastkant som efter uppvärmningen vikes över det uppvärmda området.
2. Sätt att uppvärma med infrarött ljus i enlighet med patentkravet 1, k ä n n e t e c k n a t d ä r a v att det begränsade uppvärmningsområdet är förtryckt med en färgrand (6).
3. Sätt att uppvärma med infrarött ljus i enlighet med patentkravet 2, k ä n n e t e c k n a t d ä r a v att den förtryckta färgranden (6) utgöres av en matt, mörk färg. r 465 214
SE9000154A 1990-01-16 1990-01-16 Saett att uppvaerma del av loepande materialbana SE465214B (sv)

Priority Applications (14)

Application Number Priority Date Filing Date Title
SE9000154A SE465214B (sv) 1990-01-16 1990-01-16 Saett att uppvaerma del av loepande materialbana
EP19900125647 EP0437847B1 (en) 1990-01-16 1990-12-28 A method of heating part of a continuous material web
DK90125647T DK0437847T3 (da) 1990-01-16 1990-12-28 Fremgangsmåde til opvarmning af den del af en kontinuert materialebane
ES90125647T ES2047814T3 (es) 1990-01-16 1990-12-28 Un metodo para calentar parte de un material laminado continuo.
DE90125647T DE69004945T2 (de) 1990-01-16 1990-12-28 Verfahren zum Erhitzen eines Teils einer laufenden Materialbahn.
AT90125647T ATE97855T1 (de) 1990-01-16 1990-12-28 Verfahren zum erhitzen eines teils einer laufenden materialbahn.
US07/637,553 US5113479A (en) 1990-01-16 1991-01-04 Method of infrared heating a restricted area on a continuous thermoplastic laminated web
KR1019910000255A KR960013933B1 (ko) 1990-01-16 1991-01-10 연속재료웨브의 부분을 가열하는 방법
YU5391A YU48001B (sh) 1990-01-16 1991-01-15 Postupak za zagrevanje dela kontinuirane trake materijala za pakovanje infracrvenim zracima
HU18/91A HU218369B (hu) 1990-01-16 1991-01-15 Eljárás infravörös lámpával történő hevítésre
AU69365/91A AU639290B2 (en) 1990-01-16 1991-01-15 A method of heating part of a continuous material web
CA 2034218 CA2034218C (en) 1990-01-16 1991-01-15 Method of infrared heating a restricted area on a continuous material web
CS9172A CZ279662B6 (cs) 1990-01-16 1991-01-15 Zahřívání části kontinuálního pásového materiálu
JP321891A JP2889710B2 (ja) 1990-01-16 1991-01-16 赤外光線による加熱方法

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SE9000154A SE465214B (sv) 1990-01-16 1990-01-16 Saett att uppvaerma del av loepande materialbana

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SE9000154A SE9000154A (sv) 1991-07-17
SE465214B true SE465214B (sv) 1991-08-12

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US (1) US5113479A (sv)
EP (1) EP0437847B1 (sv)
JP (1) JP2889710B2 (sv)
KR (1) KR960013933B1 (sv)
AT (1) ATE97855T1 (sv)
AU (1) AU639290B2 (sv)
CA (1) CA2034218C (sv)
CZ (1) CZ279662B6 (sv)
DE (1) DE69004945T2 (sv)
DK (1) DK0437847T3 (sv)
ES (1) ES2047814T3 (sv)
HU (1) HU218369B (sv)
SE (1) SE465214B (sv)
YU (1) YU48001B (sv)

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Also Published As

Publication number Publication date
KR960013933B1 (ko) 1996-10-10
CA2034218C (en) 2000-11-21
YU48001B (sh) 1996-08-13
AU6936591A (en) 1991-07-18
JPH04211434A (ja) 1992-08-03
ES2047814T3 (es) 1994-03-01
CA2034218A1 (en) 1991-07-17
CZ279662B6 (cs) 1995-05-17
DE69004945D1 (de) 1994-01-13
EP0437847A1 (en) 1991-07-24
JP2889710B2 (ja) 1999-05-10
ATE97855T1 (de) 1993-12-15
DK0437847T3 (da) 1994-01-17
HU910118D0 (en) 1991-08-28
AU639290B2 (en) 1993-07-22
CS9100072A2 (en) 1991-08-13
SE9000154A (sv) 1991-07-17
DE69004945T2 (de) 1994-04-28
US5113479A (en) 1992-05-12
KR910014281A (ko) 1991-08-31
SE9000154D0 (sv) 1990-01-16
YU5391A (sh) 1994-11-15
HUT60656A (en) 1992-10-28
EP0437847B1 (en) 1993-12-01
HU218369B (hu) 2000-08-28

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