DE2520217A1 - Verfahren und vorrichtung zum kontinuierlichen ueberlappungsverschweissen von kunststoff-folien oder -tafeln - Google Patents

Verfahren und vorrichtung zum kontinuierlichen ueberlappungsverschweissen von kunststoff-folien oder -tafeln

Info

Publication number
DE2520217A1
DE2520217A1 DE19752520217 DE2520217A DE2520217A1 DE 2520217 A1 DE2520217 A1 DE 2520217A1 DE 19752520217 DE19752520217 DE 19752520217 DE 2520217 A DE2520217 A DE 2520217A DE 2520217 A1 DE2520217 A1 DE 2520217A1
Authority
DE
Germany
Prior art keywords
thickness
foils
organ
layer
thinner
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.)
Granted
Application number
DE19752520217
Other languages
English (en)
Other versions
DE2520217C2 (de
Inventor
Heiner I Hammer
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.)
Schlegel Engineering GmbH
Original Assignee
Schlegel Engineering 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 Schlegel Engineering GmbH filed Critical Schlegel Engineering GmbH
Priority to DE2520217A priority Critical patent/DE2520217C2/de
Priority to GB2182475A priority patent/GB1465878A/en
Publication of DE2520217A1 publication Critical patent/DE2520217A1/de
Application granted granted Critical
Publication of DE2520217C2 publication Critical patent/DE2520217C2/de
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/40—Applying molten plastics, e.g. hot melt
    • B29C65/42—Applying molten plastics, e.g. hot melt between pre-assembled parts
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/103—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined direct heating both 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
    • B29C65/1403—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
    • B29C65/1429—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
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • 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
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to the parts 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
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91216—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts 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
    • 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
    • B29C66/91641—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 the heat or the thermal flux being non-constant over time
    • 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
    • B29C66/91641—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 the heat or the thermal flux being non-constant over time
    • B29C66/91643—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 the heat or the thermal flux being non-constant over time following a heat-time profile
    • B29C66/91645—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 the heat or the thermal flux being non-constant over time following a heat-time profile by steps
    • 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
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • 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
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

  • Verfahren und Vorrichtung zum kontinuierlichen Überlappungsverschweißen von Kunstoff-Follien oder oder -Tateln Zusatz zu Patent ... (Patentanmeldung P 24 26 154.9-10) Das Hauptpatent bezieht sich auf ein Verfahren zum Kontinueirlichen Überlappungsverschweißen von thermoplastischen Kunstoff-Follien oder -Tafeln durch Ernitzen und Zusammenpressen ihrer einander zugewendeten Oberflachen, das sich dadurch auszeichnet, daß ein Zusatzwerkstoff im heißplastischen Zustand zwischen die erhitzen Oberflächen gebracht und durch das Zusammenpressen schichtformig verteilt wird.
  • Im Hauptpatent wird die Auflasssung vertreten, daß der Zusatzwerkstoff reichllen zu dosieren sei, damit ein erneblicher Teil der für die Verschweißung der zu verbindenen Oberflächen erforderlichen Wärme durch den Zusatzwerkstoff eingebracht wird und dadurch das Verfahren von zufalligen Schwankungen der vorherigen Oberflachenerhitzung, wie sie bei Schweißarbeiten im Freien bei unterschiedlichen Wind- und Temperaturverhaltnissen nicht zu vermeiden sind, weitgehend unabhangig wird. Es zeigte sich aber, daß durch die Verwendung großerer Mengen des Zusatzwerkstoffes unerwuuschte Spannungen im Nahtbereich entstehen. Wahrend die an den Schweißbereich seitlich anschließenden Flächenteile verhaltnismaßig kühl bleiben und daher ihre Di Dimenslonen kautu ändern, erleidet das auf Sehmeiztemperatur erhitzte Material im Kern der Naht einen erhe@lichen Volumjenschrumpf.
  • Ertindu@gsgemaß wurde festgestellt, daß man die Spannungen innerua@@ eines ertraglichen Rahmens halten kann, wenn an den Preßdruck nach Dauer und Stärke so einstellt, dafl die verbieibende mittlere Dicke der Schicht des Zusatzwerkstofis nicht größer als die Dicke der Folien oder Talen ist. Wenn eine der ueiden Folien oder Tafeln dunner als die andere ist, soll das MaL der Jeweils duuneren zugrunde gelegt werden.
  • Angestrebt werden sollte eine Dicke der Schicht des Zusatzwerkstoffs von ein Drittel bis zwei Drittel der Dicke der Follen oder Tatein bzw. der jeweils dunneren Folie oder Tafel. Für den in der Prxis besonders interessierendeu Bereich von Foliendicken um 3 mm entspricht dies einer Verbleibenden mittleren Dicke der Schicht des Zusatz werkstoffs zwischen i und 2 mm.
  • UrtIlüt können sich von der mittleren Dicke seibstverstandtich Abweichungen ergeben, zumat eine wesentliehe Auf@abe des Zusatzwerkstoffes darin besteht, Abstandsunterschiede zwischen den zu verbindendch Oberfldchen awszugleienen. Solche Abstandsunterschiede sind ins-@esondere beim Arbeiten im ireien Gelande, belspie@sweise auf einer abzudichtenden Erdfiache, unvermeidilch.
  • Sie @imren teils von Bodenunebenheiten, teils von be@@en der zu vertindenden Folien oder Talein ner.
  • Die Verriugerung der Menge des Zusatzwerkstoils verringert auch die durch den Zusatzwerkstoff zwlschen die zu verbindenden Oberflachen eingebrachte harmemenge. Uaterseaied@iche (zu starke oder zu geringe) vorherige Ernitzung der zu verbindenden Oberilachen wirkt sich daner entsprechend @eichter in Fehlern der Schweißnaht aus.
  • @rfindungsgemäß ist daher vorgesenen, daß die Lrhitzung de@ Zu verßindenden Oberflachen abungig von der Temperatur gesteuert wird. Darunter soll sowohl die Regelung der @eizleistung der für die @rhitzung verwendeten Gerdie ab@@@ig von der in Bewegungsrichtung hinter diesen Geraten erreichten Oberflächentemperatur ais auch die Steuerung dieser Geräte abhangig von der in Bewegungsrichtung ver diesen Geraten gemessenen Oberflachentemperatur verstanden werden. Erfindungsgemaß Bevorzugt wird die @etztere Alternative, weil die Anordnung von Temperaturmeßeinrichtungen im Anschluß an die Erhitzun@sgerate problematisch sein kann. Erstens kann die Messung durch Store@nflusse der Heizeinrichtungen verfalscht werden und zweltens sucht man mit den Erhitzungseinrieutungen so uahe als moglich an diejenige Stelle @eranzugehen, an der die beiden Folien zusammengepreßt werden, um eine ung@eieamaßige Auskhhlung im Anschiuß an die Lrnitzung zu vermeiden. Die erfindungsgemäße Vorrichtung ist daner vorteilnafterwelse vor der Erhitzungseinrichtung mit einem Temperuiurmeßorgan ausgerüstet.
  • In diesem Zusammenhang ist die kombinierte Verwendung eines Infrarotstrahlers und mindestens einer dem Infrarotstrahier nachgeschalteten Heißluftdüse besonders vorteilhaft. Denn einerseits lassen sich elektrisch betriebene Infrarotstrahler verhältnismäßig rasch und einfach regeln, Und andererseits erscheint es zweckmäßig, wenn die von der Heißgasdüse erzeugte Heißluftwolke sich in möglichst großem Abstand von den Temperaturmeßgeräten befindet.
  • Die Erfindung wird im folgenden naher unter Bezugnahme auf die Zeichnung erläutert, die ein vorteilhaftes Ausfhhrungsbeispiel veranschaulicht. Sie zeigt einen schematischen Längsschnitt durch den Schweißber eich und ist im wesentlichen identisch mit der des Hauptpatents, so daß wegen der allgemeinen Beschreibung auf das Hauptpatent verwiesen werden kann.
  • Abweichend von dem Ausführungsbeispiel des Hauptpatents besteht die Erhitzungseinrichtung aus dem Infrarotstrahler 5 und zwei nachfolgend angeordneten Heißluftdüse 12, von denen die erste die Heißluft von beispielsweise 2700 C hauptsächlich gegen die Oberflächen 7 richtet, während der von der zweiten Düse ausgestoßene Heißluftstrom auch noch eine Komponente entgegen der Vorschubrichtung aufweist.
  • Die von dieser Düse ini weiteren Umkreis erzeugte Heißluftwolke schützt auch bis zu eihem gewissen Grade din Bereich zwischen der Heißluftdüse tind der Preßstelle 11 vor zu starker Abkühlung.
  • In Vorschubrichtung 10 vor dem Infrarotstrahler 5 ist ein Strahiungsmeßgerät angeordnet, das die Temperaturen der einander zugewendeten Oberflächen der Folien 2 und 3 mißt. Die Meßdaten werden einem automatisch arbeitenden Regler zugeführt, der die Heizleistung des Infrarotstrahlers 5 und/oder der Heißluffdüse 12 derart steuert, daß sich auch bel unterschiedlichsten Anfangstemperaturen der Folien 2 und v im Bereich 11 etwa gleiche Schweißbedingungen einstellen. Statt der Verwendungeines automatischen Steuergeräts könnte seibstverständiich auch eine optische Anzeige der Oberflächentemperaturen in Verbindung mit manueller Verstellbarkeit der Heiz-@eistung vorgesehen sein.

Claims (1)

  1. P a t e n t a n s p r ü c h e
    1. Ver@anren zum kontinuierlienen Oberlappungsversenweißen von @hermoplastisenen Kunststoff-Folien und -Tafein deren Lruitzen und Zusammenpressen Inrer einander zugewendeten Oberflachen, bei dem nach Patent ...
    (Patentanmeidung P 24 26 154.9-16) ein Zusatzwerkstoff in ne@ß,@lastischem Zustand zwischen die erhitzten oberfiachen @ebracht und durch das Zusammenpressen schicht@#rmlg verteilt wird, d a d u r c h g e k e n n -z e 1 C ü n e t , daß der Preßdruck so eingestefit @@rd, daß die verb@eibende mi@tlere Dicke der Schicht des Zusatzwerkstoffes nicht größer als die Dicke der @ugebenenfalls dünneren der zu verbindenden Folien oder Tafein ist.
    . . Verfanren nach Anspruch 1 dadurch O e k e n II -Z e i c h n e t , daL! die verbleibende mittlere Dicke der Schicht des Zusatzwerkstoffes zwischen ein Drittel nun zwei Drittel der Dicke der gegeuenenfalis dünneren der zu verbindenden Folien oder Tal'eln ist.
    @. Verfanren nach Anspruch 1 oder 2, d a d u r c h g e k e n n -z e i e @ ii e t , daß die verbleiuende mittlere Dicke der Schicht des Zusatzwerkstofles zwischen 1 und 2 mm @iegt.
    4. Verfahren nach einem der Ansprüche 1 - 3, d a d u r c h g e -h e n n z e i c h n e t , daß die Ernitzung der zu verbindenden Oberflachen abhungig von deren Temperatur gesteuert wird.
    @. Vorrichtung zur Ausübung des Verfahrens nach einem der Ansprüche 1 - 4, d a d u r c h g e k e n n z e i c h n e t, daß sie titit einem die Temperatur der zu verbindenden Oberflächen messenden Organ und einem gemäß den Meßergebnissen dieses Organs beeinflußbaren teuerert fi@r die Leistung der Erhitzungseinrichtung ausgerüstet ist.
    b. Vorrientung nach Anspruch 5, d a d u r c h g e k e n n -e e 1 c il ii e t , daß die Erhitzungseinrichtung einen Infrarotstrahler und mindestens eine in Vorschubrichtung dahinter angeordnete Heißgasduse umlaßt.
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DE2520217A 1974-05-29 1975-05-07 Verfahren und Vorrichtung zum kontinuierlichen Verschweißen von großflächigen thermoplastischen Kunststoffolien oder -tafeln Expired DE2520217C2 (de)

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DE2520217A DE2520217C2 (de) 1975-05-07 1975-05-07 Verfahren und Vorrichtung zum kontinuierlichen Verschweißen von großflächigen thermoplastischen Kunststoffolien oder -tafeln
GB2182475A GB1465878A (en) 1974-05-29 1975-05-21 Process for the continuous overlap welding of thermo-plastic sheets or panels

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DE2520217A DE2520217C2 (de) 1975-05-07 1975-05-07 Verfahren und Vorrichtung zum kontinuierlichen Verschweißen von großflächigen thermoplastischen Kunststoffolien oder -tafeln

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3616462A1 (de) * 1986-05-15 1987-11-19 Niederberg Chemie Kunststoffschweissvorrichtung
DE4000017A1 (de) * 1990-01-02 1991-07-11 Renald Kaminski Vorrichtung zum verschweissen von folienraendern
US5169052A (en) * 1990-09-05 1992-12-08 Renald Kaminski Apparatus for welding sheeting-edges
US5328545A (en) * 1991-08-24 1994-07-12 Renald Kaminski Device for overlapping welding of foil edges
US5628859A (en) * 1993-06-17 1997-05-13 Mecasonic S.A. Method of heating by emission of electromagnetic radiation, especially infrared radiation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3541053A1 (de) * 1985-11-19 1987-05-21 Marquet & Cie Noel Verfahren und vorrichtung zum kontinuierlichen flaechigen verschweissen von folien, platten, stangen und/oder rohren aus thermoplastischen kunststoffen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3008862A (en) * 1956-06-29 1961-11-14 Union Carbide Corp Extruded bead sealing
DE7228831U (de) * 1973-07-05 Windmoeller & Hoelscher Ein- oder mehrlagiger Sack oder Beutel aus heißsiegelfähigem Material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7228831U (de) * 1973-07-05 Windmoeller & Hoelscher Ein- oder mehrlagiger Sack oder Beutel aus heißsiegelfähigem Material
US3008862A (en) * 1956-06-29 1961-11-14 Union Carbide Corp Extruded bead sealing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Zeitschrift: "Kunststoff-Rundschau", 1973, Heft 2, S. 67 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3616462A1 (de) * 1986-05-15 1987-11-19 Niederberg Chemie Kunststoffschweissvorrichtung
DE4000017A1 (de) * 1990-01-02 1991-07-11 Renald Kaminski Vorrichtung zum verschweissen von folienraendern
US5169052A (en) * 1990-09-05 1992-12-08 Renald Kaminski Apparatus for welding sheeting-edges
US5328545A (en) * 1991-08-24 1994-07-12 Renald Kaminski Device for overlapping welding of foil edges
US5628859A (en) * 1993-06-17 1997-05-13 Mecasonic S.A. Method of heating by emission of electromagnetic radiation, especially infrared radiation

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