CH617123A5 - Process for fixing a thermoplastic laminate by means of T-welding or butt welding - Google Patents

Process for fixing a thermoplastic laminate by means of T-welding or butt welding Download PDF

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Publication number
CH617123A5
CH617123A5 CH1594276A CH1594276A CH617123A5 CH 617123 A5 CH617123 A5 CH 617123A5 CH 1594276 A CH1594276 A CH 1594276A CH 1594276 A CH1594276 A CH 1594276A CH 617123 A5 CH617123 A5 CH 617123A5
Authority
CH
Switzerland
Prior art keywords
hot air
air jet
laminate
thickness
outer layers
Prior art date
Application number
CH1594276A
Other languages
German (de)
Inventor
Jan-Erik Olsen
Original Assignee
Ziristor Ab
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 Ziristor Ab filed Critical Ziristor Ab
Publication of CH617123A5 publication Critical patent/CH617123A5/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F7/00—Processes not otherwise provided for
    • B31F7/006—Processes not otherwise provided for edges, e.g. sheet edges
    • 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
    • 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
    • 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
    • B29C66/11—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
    • B29C66/114—Single butt 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
    • B29C66/434—Joining substantially flat articles for forming corner connections, fork connections or cross connections
    • B29C66/4344—Joining substantially flat articles for forming fork connections, e.g. for making Y-shaped pieces
    • B29C66/43441—Joining substantially flat articles for forming fork connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces, H-shaped pieces
    • 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
    • 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
    • B29C66/727—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 porous, e.g. foam
    • 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
    • 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
    • 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
    • B29C66/91—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
    • B29C66/9192—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 in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—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 in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • 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
    • 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
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • 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
    • B29C66/71—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 composition of the plastics material 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—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
    • B29C66/7234—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 barrier layer
    • B29C66/72343—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 barrier layer for liquids
    • 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
    • B29C66/964—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving trial and error
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products

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

Description

Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Befestigen eines thermoplastischen Laminats, das eine Trägerschicht aus einem porösen Thermoplast und äussere Schichten aus je einem kompakten Thermoplast aufweist, mittels einer T- oder Stumpfverschweissung. Dabei soll die Festigkeit der Schweissnaht durch Wärmebehandlung der Kantenflächen, an denen die Schweissung ausgeführt werden soll, erhöht werden. The present invention relates to a method for fastening a thermoplastic laminate, which has a carrier layer made of a porous thermoplastic and outer layers each made of a compact thermoplastic, by means of a T or butt welding. The strength of the weld seam is to be increased by heat treatment of the edge surfaces on which the weld is to be carried out.

Für Flüssigkeiten, z. B. für flüssige Nahrungsmittel, undurchlässige Verpackungen werden unter anderem aus laminiertem, ganz aus Kunststoff bestehendem Material, das eine Mittelschicht aus geschäumtem, porösem Kunststoffmaterial und an beiden Seiten dieser Schicht auflaminierte Schichten aus kompaktem Kunststoffmaterial aufweist, hergestellt. Die Mittelschicht ist erheblich dicker als die äusseren Schichten und kann z. B. eine Dicke von 0,8 mm haben, während jede der äusseren Schichten eine Dicke von annähernd 0,1 mm hat. Dieses laminierte Material kann auch weitere Schichten aus Kunststoffmaterial oder z. B. Aluminiumfolie haben, ist aber in jedem Falle eine Verbundstruktur mit einer vergleichsweise dicken, porösen Mittelschicht und zwei auflaminierten Schichten auf beiden Seiten dieser Mittelschicht, die dem Material eine sehr gute Steifheit verleiht. Dieses Material hat in der letzten Zeit zunehmend an Beliebtheit gewonnen, und zwar in erster Linie wegen der Tatsache, dass das Material ausserordentlich leicht ist und ausserdem billiger ist als die bisher verwendeten Typen von Verpackungslaminaten mit einer Mittelschicht aus Papier. For liquids, e.g. B. for liquid foods, impermeable packaging are made, among other things, of laminated, completely plastic material, which has a middle layer of foamed, porous plastic material and laminated layers on both sides of this layer made of compact plastic material. The middle layer is considerably thicker than the outer layers and can e.g. B. have a thickness of 0.8 mm, while each of the outer layers has a thickness of approximately 0.1 mm. This laminated material can also further layers of plastic material or z. B. have aluminum foil, but is in any case a composite structure with a comparatively thick, porous middle layer and two laminated layers on both sides of this middle layer, which gives the material very good rigidity. This material has become increasingly popular recently, primarily because of the fact that the material is extremely light and is also cheaper than the types of packaging laminates with a middle layer of paper used to date.

Die bekannten Verpackungen verschiedenen Typs, die aus diesem laminierten Kunststoffmaterial hergestellt werden, haben zahlreiche verschiedene Konstruktionen und haben demzufolge auch Schweissnähte vieler verschiedener Typen. Die verschiedenen Typen haben jedoch die gemeinsame Eigenschaft, dass beim Verbinden und Schweissen die thermoplastischen Eigenschaften des Materials ausgenützt werden, d. h., das Verbinden wird im allgemeinn so ausgeführt, dass die für das Verbinden bestimme Fläche auf eine solche Temperatur erhitzt wird, dass das thermoplastische Material erweicht, worauf ein direktes Verbinden und Zusammenpressen erfolgt. Es hat sich gezeigt, dass diese Methode bei überlappten Schweiss-nähten sehr dauerhafte Schweissungen ergibt, da vergleichsweise grosse Anteile der Oberflächenschichten des Materials miteinander verbunden werden. Zur Erweiterung der Möglichkeiten von Formung und Konstruktion der Verpackungstypen ist es auch erwünscht, bei dem laminierten Material T-oder Stumpfnahtschweissungen zu erzielen, d. h. Schweissnähte des Typs, bei dem die betreffenden Flächengebilde aus dem Material in T-Form oder Kante auf Kante verbunden werden. Bei Schweissnähten dieses Typs kann bei dem einen Flächengebilde aus dem Material nur die Kantenfläche des Flächengebildes für die Verschweissung verwendet werden. Da die zentrale Trägerschicht aus geschäumtem Kunststoffmaterial an sich eine sehr geringe Festigkeit hat, sind es im Endeffekt nur die Kantenflächen der beiden homogenen Kunststoffdichten, die für das Verbinden verwendet werden; infolgedessen lässt sich einerseits eine Naht dieses Typs, die für Flüssigkeit undurchlässig ist, nur schwer erzielen, während anderseits eine Naht dieses Typs eine unbefriedigende Festigkeit hat. The known packaging of different types, which are made from this laminated plastic material, have numerous different constructions and consequently also have weld seams of many different types. The different types, however, have the common property that the thermoplastic properties of the material are used during the joining and welding, i. that is, the connection is generally carried out by heating the surface intended for the connection to a temperature such that the thermoplastic material softens, followed by direct connection and compression. It has been shown that this method results in very permanent welds in the case of overlapped weld seams, since comparatively large proportions of the surface layers of the material are connected to one another. To expand the possibilities of shaping and designing the types of packaging, it is also desirable to achieve T or butt welds on the laminated material. H. Weld seams of the type in which the fabrics in question are connected from the material in a T-shape or edge to edge. In the case of weld seams of this type, only the edge surface of the fabric can be used for welding in the one fabric made of the material. Since the central carrier layer made of foamed plastic material has a very low strength per se, in the end it is only the edge surfaces of the two homogeneous plastic densities that are used for the connection; as a result, a seam of this type that is impermeable to liquid is difficult to achieve on the one hand, while on the other hand a seam of this type has unsatisfactory strength.

Es wurde vorgeschlagen, dieses Problem zu lösen, indem man für den Verbindungsprozess nicht die thermoplastischen Eigenschaften des Materials ausnützte, sondern stattdessen im Zusammenhang mit dem Verbinden einen in der Hitze schmelzbaren Leim an der Stelle der Naht aufbrachte. Diese Lösung weist jedoch verschiedene schwerwiegende Nachteile auf, da die Aufbringung eines in der Hitze schmelzbaren Leims einen zusätzlichen Arbeitsgang darstellt, wodurch die Maschinen zur Herstellung von Verpackungen komplizierter werden. It has been proposed to solve this problem by not taking advantage of the thermoplastic properties of the material for the joining process, but instead applying a heat-meltable glue at the seam site in connection with the joining. However, this solution has several serious disadvantages, since the application of a heat-meltable glue is an additional step, which complicates the packaging machines.

Ziel der Erfindung ist es, ein Verfahren zur Verfügung zu stellen, das es ermöglicht, thermoplastische Materialien des oben genannten Typs in Form von dichten und festen T-Näh-ten oder Stumpfnähten miteinander zu verbinden, wobei man die thermoplastischen Eigenschaften des Materials ausnützt und keinerlei Klebstoff aufbringt, und das nicht die erwähnten Nachteile besitzt. The aim of the invention is to provide a method which makes it possible to connect thermoplastic materials of the type mentioned above in the form of tight and firm T-seams or butt seams, taking advantage of the thermoplastic properties of the material and none at all Apply adhesive, and which does not have the disadvantages mentioned.

Das Verfahren gemäss der Erfindung ist im unabhängigen Patentanspruch definiert. The method according to the invention is defined in the independent claim.

Bevorzugte Ausführungsformen des erfindungsgemässen Verfahrens sind in den abhängigen Ansprüchen definiert. Preferred embodiments of the method according to the invention are defined in the dependent claims.

Durch dieses Verfahren wird eine neue Lösung des Problems, laminierte thermoplastische Materialien in T- oder Stumpfschweissnähten miteinander zu verbinden, erzielt. Es wird keinerlei Additivmaterial verwendet, sondern stattdessen wird die Kante des Materials selbst verformt, so dass es sich besser für das Verschweissen eignet. Die vorgeschlagene Lösung kann in Verbindung mit dem normalen, notwendigen Aufheizen der Kante im Zusammenhang mit der tatsächlichen Verschweissung ausgeführt werden, und es sind keinerlei komplizierte Hilfsvorrichtungen erforderlich, sondern lediglich eine genauere und speziell orientierte Erhitzung der Kanten des Materials, die miteinander verbunden werden sollen. This process provides a new solution to the problem of joining laminated thermoplastic materials in T or butt welds. No additive material is used, instead the edge of the material itself is deformed so that it is more suitable for welding. The proposed solution can be carried out in connection with the normal, necessary heating of the edge in connection with the actual welding, and no complicated auxiliary devices are required, but only a more precise and specifically oriented heating of the edges of the material which are to be joined together.

Im folgenden wird die Erfindung im einzelnen anhand der In the following the invention will be described in more detail with reference to the

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beiliegenden schematischen Zeichnung beispielsweise erläutert. attached schematic drawing explained for example.

Die Fig. la bis lc zeigen teilweise im Schnitt und in ver-grössertem Massstab das aufeinanderfolgende Erhitzen der Kante des Materials bei Anwendung des erfindungsgemässen Verfahrens. La to lc show partly in section and on an enlarged scale the successive heating of the edge of the material when using the method according to the invention.

Fig. 2 zeigt im Schnitt und weiter vergrössert zwei Flächengebilde aus dem Material, nachdem sie erfindungsgemäss erhitzt und anschliessend miteinander verbunden worden sind. Fig. 2 shows in section and further enlarged two sheets made of the material after they have been heated according to the invention and then joined together.

In Fig. 1 wird ein Teil eines Flächengebildes aus einem Material dargestellt, das eine Mittelschicht 2 aus porösem Kunststoffmaterial, z. B. geschäumtem Polystyrol, aufweist. Die mittlere Trägerschicht 2 hat eine Dicke von 0,8 mm und ist auf beiden Seiten mit kompakten Schichten 3, 4 aus thermoplastischem Material, z. B. Polystyrol oder Polyäthylen, laminiert. Die Schichten 3, 4 sind jeweils annähernd 0,1 mm dick. Die Kante 5 des Flächengebildes aus Material, die sich in der Zeichnung an der rechten Seite befindet, wird abgeschnitten im wesentlichen in rechtem Winkel zur Ebene des Flächengebildes 1 aus dem Material. Zur rechten Seite dieser Kante 5 des Flächengebildes befindet sich eine Düse 6, die mit einer Anzahl von Luftaustrittslöchern 7 versehen ist, die zylindrisch oder rechteckig sind und nahe beieinander in einer Reihe angeordnet sind, deren Länge der Breite des Flächengebildes aus Material oder der Länge der Kantenfläche 5 entspricht, die mit Hilfe eines Heissluftstrahls erhitzt werden soll, der durch die Kanäle 7 der Düse 6 austritt. Der Kanal 7 hat eine Dicke, die annähernd dem Einfachen bis Dreifachen der Dicke der Trägerschicht 2 entspricht. In Fig. 1, a part of a sheet made of a material is shown, the middle layer 2 made of porous plastic material, for. B. foamed polystyrene. The middle carrier layer 2 has a thickness of 0.8 mm and is on both sides with compact layers 3, 4 made of thermoplastic material, for. As polystyrene or polyethylene, laminated. The layers 3, 4 are each approximately 0.1 mm thick. The edge 5 of the sheet made of material, which is located on the right side in the drawing, is cut off essentially at right angles to the plane of the sheet 1 made of the material. To the right of this edge 5 of the sheet is a nozzle 6, which is provided with a number of air outlet holes 7, which are cylindrical or rectangular and are arranged close together in a row, the length of the sheet of material or the length of the sheet Corresponds to edge surface 5 which is to be heated with the aid of a hot air jet which emerges through the channels 7 of the nozzle 6. The channel 7 has a thickness that corresponds approximately to one to three times the thickness of the carrier layer 2.

In Fig. la ist das Flächengebilde aus dem Material vor dem Erhitzen der Kante 5 des Materials durch Heissluft dargestellt. In Fig. lb ist das Flächengebilde aus dem Material während des Erhitzens der Kante 5 dargestellt, und in Fig. lc ist das Flächengebilde aus Material unmittelbar vor dem Unterbrechen des Erhitzens dargestellt. Fig. 2 zeigt das Flächengebilde 1 aus dem Material, nachdem es mit einem zweiten Flächengebilde 8 aus einem Material, das den gleichen Typ und die gleiche Zusammensetzung wie das Flächengebilde 1 aus dem Material haben kann, in einer T-Naht vereinigt worden ist. In Fig. La the sheet of material is shown by heating the edge 5 of the material by hot air. In Fig. Lb the sheet made of the material is shown during the heating of the edge 5, and in Fig. Lc the sheet made of material is shown immediately before the interruption of the heating. Fig. 2 shows the sheet 1 made of the material after it has been combined in a T-seam with a second sheet 8 made of a material which can have the same type and the same composition as the sheet 1 made of the material.

Wenn die beiden Flächengebilde 1, 8 mittels einer T-Schweissnaht miteinander verbunden werden sollen, kann das erfindungsgemässe Verfahren folgendermassen ausgeführt werden: Das eine Flächengebilde aus Material (Fig. la), dessen äussere Schichten 3, 4 die gleiche Dicke haben, wird in be-zug auf die Öffnung 7 der Düse 6 so angeordnet, dass die Mittellinie dieser Öffnung mit der Mittelebene des Flächengebildes 1 zusammenfällt. Der Abstand zwischen der Kantenfläche 5 des Flächengebildes 1 und der Öffnung des Luftkanals 7 wird entsprechend gewählt, so dass der Abstand das Einfache bis l,5fache der Dicke des Flächengebildes 1 beträgt. Die Ausrichtung und die Einstellung des Abstandes zwischen dem Flächengebilde 1 und der Düse 6 kann je nach der Art der Verpackungsmaschine, in der die Operation stattfindet, entweder durch Bewegen des Flächengebildes 1 oder durch Bewegen der Düse 6 oder durch Bewegen sowohl des Flächengebildes als auch der Düse ausgeführt werden. If the two flat structures 1, 8 are to be connected to one another by means of a T-weld seam, the method according to the invention can be carried out as follows: The one flat structure made of material (FIG. 1 a), the outer layers 3, 4 of which have the same thickness, is described in be - Arranged on the opening 7 of the nozzle 6 so that the center line of this opening coincides with the center plane of the fabric 1. The distance between the edge surface 5 of the sheet 1 and the opening of the air duct 7 is chosen accordingly, so that the distance is simple to 1.5 times the thickness of the sheet 1. The orientation and adjustment of the distance between the sheet 1 and the nozzle 6 can, depending on the type of packaging machine in which the operation takes place, either by moving the sheet 1 or by moving the nozzle 6 or by moving both the sheet and the Nozzle.

Nach der relativen Ausrichtung des Flächengebildes 1 und der Düse 6 wird durch den Kanal 7 der Düse ein Heissluft-strom gegen die Kantenfläche 5 des Flächengebildes 1 geblasen. Infolge der Ausrichtung der Düse 6 trifft der Hauptstrom des Luftstrahls, von dem angenommen werden kann, dass er fast die gleiche Dicke bzw. den gleichen Durchmesser wie der Kanal 7 hat, die Kantenfläche 5 symmetrisch; wie aus Fig. lb ersichtlich ist, führt dies dazu, dass die Trägerschicht 2 sich nach dem Erhitzen auf ihre Erweichungstemperatur in bezug auf die äusseren Schichten etwas zurückzieht, was einerseits darauf beruht, dass die Schicht 2 früher schmilzt als die äusseren Schichten (die eine erheblich höhere Wärmekapazität haben), und anderseits auf der Wirkung des dynamischen Druk-kes der austretenden Heissluft beruht. Gleichzeitig erweichen die beiden äusseren Schichten 3, 4 des Flächengebildes 1 in ihren äusseren Teilen an der Kantenfläche 5 unter der Einwirkung der Hitze und werden nach der Mittelebene des Flächengebildes 1 gebogen. After the relative alignment of the flat structure 1 and the nozzle 6, a hot air stream is blown through the channel 7 of the nozzle against the edge surface 5 of the flat structure 1. Due to the alignment of the nozzle 6, the main stream of the air jet, which can be assumed to have almost the same thickness or the same diameter as the channel 7, hits the edge surface 5 symmetrically; As can be seen from Fig. lb, this leads to the fact that the carrier layer 2 retracts somewhat after heating to its softening temperature in relation to the outer layers, which is based on the one hand that the layer 2 melts earlier than the outer layers (the one have significantly higher heat capacity), and on the other hand is based on the effect of the dynamic pressure of the escaping hot air. At the same time, the two outer layers 3, 4 of the fabric 1 soften in their outer parts on the edge surface 5 under the action of the heat and are bent towards the central plane of the fabric 1.

Bei weiterem Erhitzen (Fig. lc) falten sich die Kantenzonen 5 der beiden äusseren Schichten 3, 4 weiter, bis die Kanten der Schichten sich treffen und gerade vor der Mittelebene des Flächengebildes 1 teilweise zusammenschmelzen. Diese Schichten schützen dann das Schaumstoffmaterial, das darunter liegt, vor weiterem Schmelzen. Upon further heating (FIG. 1 c), the edge zones 5 of the two outer layers 3, 4 continue to fold until the edges of the layers meet and partially melt together just in front of the central plane of the fabric 1. These layers then protect the foam material underneath from further melting.

Unmittelbar nach diesem Erweichen und dieser Umformung der Kantenfläche 5 des Flächengebildes 1 wird die Düse 6 entfernt, worauf die Kantenfläche 5 des Flächengebildes 1 mit dem zweiten Flächengebilde 8 verbunden wird, und zwar in Form einer T-Schweissnaht. Parallel mit dem beschriebenen Erhitzen der Kantenfläche 5 des Flächengebildes wird auch die Oberflächenschicht des anderen Flächengebildes 8, das für die Schweissung verwendet werden soll, entsprechend erhitzt. Immediately after this softening and this reshaping of the edge surface 5 of the sheet 1, the nozzle 6 is removed, whereupon the edge surface 5 of the sheet 1 is connected to the second sheet 8, in the form of a T-weld. In parallel with the described heating of the edge surface 5 of the fabric, the surface layer of the other fabric 8 that is to be used for welding is also heated accordingly.

In Fig. 2 ist in grösserem Massstab ein Schnitt durch die beiden miteinander verbundenen Flächengebilde 1, 8 dargestellt. Aus der Figur ist ersichtlich, dass die Schweissung vollständig zwischen den beiden nach innen gefaltenen äusseren Schichten 3, 4 des Flächengebildes 1 und der einen äusseren Schicht des anderen Flächengebildes 8 ausgeführt ist, so dass eine sehr feste und dauerhafte Verbindung erzielt worden ist. In Fig. 2, a section through the two interconnected fabrics 1, 8 is shown on a larger scale. From the figure it can be seen that the welding is carried out completely between the two inwardly folded outer layers 3, 4 of the flat structure 1 and the one outer layer of the other flat structure 8, so that a very firm and permanent connection has been achieved.

Im oben beschriebenen Falle sind die beiden äusseren Schichten des laminierten thermoplastischen Materials vom gleichen Typ und haben die gleiche Dicke; dies bedeutet, dass der Heissluftstrahl auf den mittleren Teil der Trägerschicht 2, die an der Kante des Laminates freigelegt ist, gerichtet werden sollte, um ein regelmässiges, symmetrisches Einfalten der äusseren Schichten zu gewährleisten. Mit anderen Worten: Die Düse ist in der Verlängerung der Mittelebene des Flächengebildes 1 angeordnet. In the case described above, the two outer layers of the laminated thermoplastic material are of the same type and have the same thickness; This means that the hot air jet should be directed onto the middle part of the carrier layer 2, which is exposed at the edge of the laminate, in order to ensure a regular, symmetrical folding in of the outer layers. In other words: the nozzle is arranged in the extension of the central plane of the fabric 1.

Wenn das Flächengebilde, dessen Kantenfläche für das Verschweissen verwendet werden soll, mit äusseren Schichten von verschiedener Dicke oder von verschiedenem Typ bedeckt ist, kann es erforderlich werden, die Düse in bezug auf die Mittelebene des Flächengebildes parallel zu verschieben, so dass ein symmetrisches Einfalten der äusseren Schichten erzielt werden kann. Die Düse wird in Richtung auf die dickere Oberflächenschicht hin verschoben, und der erforderliche Abstand wird am besten in jedem einzelnen Fall festgelegt. Eine solche Verschiebung der Düse kann auch aus anderen Gründen erforderlich sein, z. B. falls die Verpackungsmaschine, in der das Verfahren ausgeführt wird, eine ungleichmässige Wärmeabgabe von den äusseren Schichten des Laminates verursacht. If the sheet whose edge surface is to be used for welding is covered with outer layers of different thickness or of different types, it may be necessary to move the nozzle parallel with respect to the central plane of the sheet, so that a symmetrical folding of the outer layers can be achieved. The nozzle is moved towards the thicker surface layer, and the required distance is best determined in each individual case. Such displacement of the nozzle may also be necessary for other reasons, e.g. B. if the packaging machine in which the process is carried out causes uneven heat release from the outer layers of the laminate.

Die Dicke des Heissluftstrahls wird an die Dicke des Flächengebildes angepasst, das behandelt werden soll. Der Hauptstrom des Heissluftstrahls, dessen Dicke als im wesentlichen der Dicke der Düsenöffnung 7 entsprechend angesehen werden kann, wird so gewählt, dass seine Dicke das Einfache bis Dreifache der Dicke der Trägerschicht des laminierten Materials ausmacht. Der Heissluftstrahl hat eine Gesamtdicke, die 1,5- bis 4mal die Gesamtdicke des Materials beträgt. Für die Materialdicken, die in der Praxis für die Herstellung von Verpackungsbehältern für Getränke und dergleichen verwendet werden, bedeutet dies, dass der Heissluftstrahl eine Gesamtdicke zwischen 1 und 5 mm hat. Für thermoplastisches Material der genannten Typen, d. h. Polystyrol oder Polyäthylen, muss der Heissluftstrahl eine Temperatur von 350 bis 450° C, vorzugsweise annähernd 400° C, und eine Geschwindigkeit von 6 bis 12 m pro Sekunde, vorzugsweise annähernd 7,5 m pro Sekunde, haben. Bei niedrigen Temperaturen und Geschwindigkeiten wird die erforderliche Erhitzung des Materials The thickness of the hot air jet is adapted to the thickness of the fabric to be treated. The main stream of the hot air jet, the thickness of which can be regarded as essentially corresponding to the thickness of the nozzle opening 7, is selected such that its thickness is from one to three times the thickness of the carrier layer of the laminated material. The hot air jet has a total thickness that is 1.5 to 4 times the total thickness of the material. For the material thicknesses that are used in practice for the production of packaging containers for drinks and the like, this means that the hot air jet has a total thickness between 1 and 5 mm. For thermoplastic material of the types mentioned, i. H. Polystyrene or polyethylene, the hot air jet must have a temperature of 350 to 450 ° C, preferably approximately 400 ° C, and a speed of 6 to 12 m per second, preferably approximately 7.5 m per second. At low temperatures and speeds, the required heating of the material

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nicht innerhalb einer tragbaren Zeit erzielt, und höhere Temperaturen und Luftgeschwindigkeiten erzeugen eine ziemlich unregelmässige Deformierung der Kante des Materials. not achieved within a reasonable amount of time, and higher temperatures and air velocities produce a rather irregular deformation of the edge of the material.

Das Einfalten der äusseren Schichten des thermpolasti-schen Materials kann mit Hilfe des erfindungsgemässen Verfahrens unabhängig von einer möglichen Orientierung der Laminatschichten erzielt werden. Die Operation kann mit einer ortsfesten oder sich bewegenden Materialbahn stattfinden, was vom Typ der Verpackungsmaschine abhängt, die verwendet s werden soll. The folding in of the outer layers of the thermoplastic material can be achieved with the aid of the method according to the invention regardless of a possible orientation of the laminate layers. The operation can take place with a stationary or moving web of material, depending on the type of packaging machine to be used.

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1 Blatt Zeichnungen 1 sheet of drawings

Claims (8)

617 123617 123 1. Verfahren zum Befestigen eines thermoplastischen Laminates, das eine Trägerschicht (2) aus einem porösen Thermoplast und äussere Schichten (3, 4) aus je einem kompakten Thermoplast aufweist, mittels einer T- oder Stumpfverschweis-sung, dadurch gekennzeichnet, dass man die Stirnfläche (5) des zu verschweissenden Laminatrandes vor dem Verschweissen mit Hilfe eines Heissluftstrahls aufwärmt, wobei der Hauptstrom des Heissluftstrahls mindestens so dick wie die Trägerschicht (2) ist und in einem praktisch rechten Winkel gegen die Stirnfläche (5) gerichtet wird, so dass vor der Schweissopera-tion ein solches Schmelzen an der Stirnfläche eintritt, dass die Trägerschicht (2) sich zurückzieht und die beiden äusseren Schichten (3, 4) aufeinander zu geschmolzen werden und sich praktisch in der Mittelebene des Laminats (1) treffen. 1. A method for fastening a thermoplastic laminate, which has a carrier layer (2) made of a porous thermoplastic and outer layers (3, 4) each made of a compact thermoplastic, by means of a T or butt welding solution, characterized in that the end face (5) of the laminate edge to be welded before welding with the help of a hot air jet, the main stream of the hot air jet being at least as thick as the carrier layer (2) and directed at a practically right angle against the end face (5), so that in front of the Welding operation such melting occurs on the end face that the backing layer (2) withdraws and the two outer layers (3, 4) are melted towards one another and practically meet in the central plane of the laminate (1). 2. Verfahren nach Anspruch 1, wobei die beiden äusseren Schichten (3, 4) des Laminats (1) die gleiche Dicke haben, dadurch gekennzeichnet, dass der Heissluftstrahl auf die Mittelebene des Laminats gerichtet wird. 2. The method according to claim 1, wherein the two outer layers (3, 4) of the laminate (1) have the same thickness, characterized in that the hot air jet is directed onto the central plane of the laminate. 2 2nd PATENTANSPRÜCHE PATENT CLAIMS 3. Verfahren nach Anspruch 1, wobei die beiden äusseren Schichten (3, 4) unterschiedliche Dicke aufweisen, dadurch gekennzeichnet, dass der Heissluftstrahl in Richtung auf die dickere äussere Schicht verschoben wird. 3. The method according to claim 1, wherein the two outer layers (3, 4) have different thicknesses, characterized in that the hot air jet is displaced in the direction of the thicker outer layer. 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Dicke des Hauptstroms des Heissluftstrahls das Einfache bis Dreifache der Dicke der Trägerschicht des Laminats beträgt. 4. The method according to any one of claims 1 to 3, characterized in that the thickness of the main stream of the hot air jet is from one to three times the thickness of the carrier layer of the laminate. 5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Gesamtdicke des Heissluftstrahls das l,5bis 4,0fache der Gesamtdicke des Laminats beträgt. 5. The method according to any one of claims 1 to 3, characterized in that the total thickness of the hot air jet is 1.5 to 4.0 times the total thickness of the laminate. 6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Heissluftstrahl eine Dicke von 1 bis 5 mm hat. 6. The method according to any one of claims 1 to 5, characterized in that the hot air jet has a thickness of 1 to 5 mm. 7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Heissluftstrahl eine Temperatur von 350 bis 450° C, vorzugsweise von annähernd 400° C, hat. 7. The method according to any one of claims 1 to 6, characterized in that the hot air jet has a temperature of 350 to 450 ° C, preferably of approximately 400 ° C. 8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Heissluftstrahl eine Geschwindigkeit von 6 bis 12 m pro Sekunde, vorzugsweise von annähernd 7,5 m pro Sekunde, hat. 8. The method according to any one of claims 1 to 7, characterized in that the hot air jet has a speed of 6 to 12 m per second, preferably of approximately 7.5 m per second.
CH1594276A 1975-12-19 1976-12-17 Process for fixing a thermoplastic laminate by means of T-welding or butt welding CH617123A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7514443A SE403069B (en) 1975-12-19 1975-12-19 AT THE T-OR STUMB JOINT SEALING OF LAMINATED FULL PLASTIC MATERIAL

Publications (1)

Publication Number Publication Date
CH617123A5 true CH617123A5 (en) 1980-05-14

Family

ID=20326395

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1594276A CH617123A5 (en) 1975-12-19 1976-12-17 Process for fixing a thermoplastic laminate by means of T-welding or butt welding

Country Status (10)

Country Link
JP (1) JPS5276381A (en)
AU (1) AU503624B2 (en)
CA (1) CA1077666A (en)
CH (1) CH617123A5 (en)
DE (1) DE2656804C3 (en)
FR (1) FR2335324A1 (en)
GB (1) GB1501830A (en)
IT (1) IT1065599B (en)
NL (1) NL185711C (en)
SE (1) SE403069B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5410814A (en) * 1977-06-27 1979-01-26 Toshiba Corp Testre for electronic controller of automobile
JPS5410811A (en) * 1977-06-27 1979-01-26 Toshiba Corp Tester for electronic controller of automobile
JPS5410810A (en) * 1977-06-27 1979-01-26 Toshiba Corp Tester for electronic controller of automobile
JPS5410812A (en) * 1977-06-27 1979-01-26 Toshiba Corp Tester for electronic controller of automobile
DE3407060C2 (en) * 1984-02-27 1986-04-10 Krupp Corpoplast Maschinenbau GmbH, 2000 Hamburg Process for making a parison for blow molding

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52513B2 (en) * 1971-12-13 1977-01-08

Also Published As

Publication number Publication date
SE403069B (en) 1978-07-31
SE7514443L (en) 1977-06-20
NL185711C (en) 1990-07-02
DE2656804C3 (en) 1978-11-02
FR2335324B1 (en) 1980-04-11
GB1501830A (en) 1978-02-22
CA1077666A (en) 1980-05-20
DE2656804A1 (en) 1977-07-14
NL7613835A (en) 1977-06-21
FR2335324A1 (en) 1977-07-15
IT1065599B (en) 1985-02-25
AU2033076A (en) 1978-06-15
AU503624B2 (en) 1979-09-13
DE2656804B2 (en) 1978-03-02
JPS5276381A (en) 1977-06-27
NL185711B (en) 1990-02-01

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