CH363606A - Method and device for the continuous production of a tubular packaging casing laminated on the inside with thermoplastic material - Google Patents

Method and device for the continuous production of a tubular packaging casing laminated on the inside with thermoplastic material

Info

Publication number
CH363606A
CH363606A CH5359557A CH5359557A CH363606A CH 363606 A CH363606 A CH 363606A CH 5359557 A CH5359557 A CH 5359557A CH 5359557 A CH5359557 A CH 5359557A CH 363606 A CH363606 A CH 363606A
Authority
CH
Switzerland
Prior art keywords
annular gap
tube
spray nozzle
edges
carrier
Prior art date
Application number
CH5359557A
Other languages
German (de)
Inventor
Reifenhaeuser Friedrich
Original Assignee
A Reifenhaeuser Fa
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 A Reifenhaeuser Fa filed Critical A Reifenhaeuser Fa
Publication of CH363606A publication Critical patent/CH363606A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B29C48/152—Coating hollow articles the inner surfaces thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5035—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being in thread form, i.e. in the form of a single filament, e.g. in the form of a single coated filament
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5092—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the tape handling mechanisms, e.g. using vacuum
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

       

  
 



  Verfahren und Vorrichtung zur kontinuierlichen   llerstellung    einer innenseitig mit thermoplastischem Kunststoff kaschierten rohrförmigen Verpackungshülle
Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zur kontinuierlichen Herstellung einer innenseitig mit thermoplastichem Kunststoff kaschierten rohrförmigen Verpackungshülle unter Verwendung eines Trägerstoffes in Form eines Bandes, das in Längsrichtung zu einem Rohr geformt wird und dessen sich überlappende Ränder miteinander verbunden werden.



   Die Erfindung besteht darin, dass das Trägerstoffrohr kontinuierlich über den Spritzkopf einer Spritzmaschine für thermoplastische Massen geführt wird, aus dessen Ringspalt ein Schlauch aus thermoplastischem Kunststoff derart austritt, dass die Innenseite des Trägerstoffrohres von dem Schlauch kaschiert wird.



   Die ebenfalls Gegenstand der Erfindung bildende Vorrichtung zur Durchführung des erfindungsgemässen Verfahrens ist dadurch gekennzeichnet, dass der Spritzkopf einer Strangpresse aus zwei konzentrischen Rohren besteht, die zwischen sich einen hohlzylindrischen Zuführungskanal für den Kunststoff freilassen, welcher Kanal an den Enden der Rohre in einen eine Spritzdüse bildenden Ringspalt endigt, welcher mit Spiel von einem Stützring für den Durchtritt des zu behandelnden Trägerstoff Rohres umfasst ist, und dass im Zuführungskanal eine im Abstand von dem Ringspalt angeordnete Ausmündung vorgesehen ist, die mit einer gegen den Ringspalt gerichteten Spritzdüse zur Herstellung eines Kunststoffadens versehen ist, und zwischen der Spritzdüse und dem Ringspalt zwei geheizte, zum Aneinanderpressen der Ränder dienende Druckrollen angeordnet sind.



   Es können beliebige Trägerstoffe verwendet werden, die sich mit dem thermoplastischen Kunststoff vereinigen lassen. Insbesondere geeignet sind Trägerstoffe aus Cellulose, wie Papier, Pappe und dergleichen.



   Die Vorrichtung gemäss der Erfindung eignet sich besonders für eine kontinuierliche Verpackung unter luftdichtem Abschluss, insbesondere für Lebensmittel, wobei das Verpackungsgut durch das innere Rohr der beiden den Spritzkopf bildenden Rohre zugeführt werden kann. Das Verpackungsgut kommt daher nur mit diesem Rohr in Berührung, aus dem es unmittelbar und gegebenenfalls kontinuierlich in die Verpackungshülle gelangt.



   Als Werkstoff für die   durch Strangpres sen innerhalb    des   Rohres    aufgebrachte Kunststoffhülle eignen sich besonders Polyäthylen oder andere bekannte thermoplastische Kunststoffe mit gleichen Eigenschaften.



   In der Zeichnung sind Ausführungsbeispiele von Vorrichtungen zur Durchführung des nachfolgend beispielsweise erläuterten erfindungsgemässen Verfahrens veranschaulicht, und zwar zeigen:
Fig. 1 einen Längsschnitt durch das   Mündungs    teil eines Spritzkopfes.



   Fig. 2 einen Querschnitt nach der Linie II-II der Fig. 1.



   Fig. 3 als Ausführungsbeispiel der erfindungsgemässen Vorrichtung zur Durchführung des Verfahrens nach der Erfindung einen Längsschnitt durch den unteren Teil einer Spritzdüse mit seitlicher Abzweigung des Spritzkanals für die Fadenbildung, und die
Fig. 4 und 5 Querschnitte nach der Linie IV-IV, bzw. V-V der Fig. 3.



   Der Spritzkopf (Fig. 1) besteht aus zwei konzen  trischen Rohren 1, 2, die für r die Zuführung des    Kunststoffes zwischen sich einen   hoblzylindrischen    Zuführungskanal 3 freilassen, der an den Enden der   Rohre in einen im Mantel des Spritzkopfes liegenden, eine Spritzdüse bildenden Ringspalt 7 endigt, welcher schwach kegelig gegen den Mantel und das vordere Ende des Spritzkopfes geneigt ausgebildet ist.



  Der Ringspalt 7 ist mit geringemSpielvoneinemStützring 9 für den Durchtritt des zu behandelnden Rohres 8 umfasst, das aus Papier, Pappe, Kunststoff oder sonstigem glattem formsteifem Werkstoff in Form eines Bandes hergestellt ist, wobei das Band in seiner Längsrichtung zum Rohr 8 eingerollt und seine sich überlappenden Ränder miteinander verbunden werden. Das Rohr 8 liegt dabei dicht am Ende des äusseren Rohres 2 des Spritzkopfes an, während das Ende 4 des inneren Rohres 1 des Spritzkopfes mit dem Innenmantel des Rohres 8 einen der Stärke des   auf      zuspritzenden    Schlauches 5 aus Kunststoff entsprechenden zylindrischen Spalt 7a bildet.



   Der durch den Ringspalt 7 austretende thermoplastische Kunststoff wird durch Strangpressen in an sich bekannter Weise innerhalb des Rohres 8 und in seiner Stärke durch den Spalt 7a begrenzt in einem geschlossenen Schlauch 5 aufgebracht, wobei eine Aufweitung des Rohres 8 durch den es umfassenden Stützring 9 verhindert wird. Nach dem Verlassen des Stützringes 9 ist der Schlauch 5 an der Innenseite des Rohres 8 soweit erhärtet, dass das Verpackungsgut eingefüllt werden kann, was über den Hohlraum 10 des Rohres 1 des Spritzkopfes erfolgt.   



  
 



  Method and device for the continuous production of a tubular packaging casing laminated on the inside with thermoplastic material
The invention relates to a method and a device for the continuous production of a tubular packaging casing laminated on the inside with thermoplastic synthetic material using a carrier material in the form of a tape, which is formed in the longitudinal direction into a tube and the overlapping edges of which are connected to one another.



   The invention consists in that the carrier tube is continuously guided over the injection head of an injection molding machine for thermoplastic compounds, from whose annular gap a tube made of thermoplastic material emerges in such a way that the inside of the carrier tube is concealed by the tube.



   The device for carrying out the method according to the invention, which is also the subject of the invention, is characterized in that the extrusion head of an extrusion press consists of two concentric tubes which leave a hollow cylindrical feed channel for the plastic between them, which channel at the ends of the tubes into a spray nozzle Annular gap ends, which is encompassed with play by a support ring for the passage of the carrier tube to be treated, and that an opening is provided in the feed channel which is arranged at a distance from the annular gap and is provided with a spray nozzle directed against the annular gap for producing a plastic thread, and between the spray nozzle and the annular gap, two heated pressure rollers serving to press the edges together are arranged.



   Any carrier materials that can be combined with the thermoplastic can be used. Carrier materials made of cellulose, such as paper, cardboard and the like, are particularly suitable.



   The device according to the invention is particularly suitable for continuous packaging with an airtight seal, in particular for foodstuffs, whereby the packaging material can be fed through the inner tube of the two tubes forming the spray head. The packaged goods therefore only come into contact with this tube from which they pass directly and optionally continuously into the packaging casing.



   As a material for the applied by extrusion sen inside the pipe plastic casing are particularly suitable polyethylene or other known thermoplastics with the same properties.



   In the drawing, exemplary embodiments of devices for carrying out the method according to the invention explained below by way of example are illustrated, namely:
Fig. 1 is a longitudinal section through the mouth part of a spray head.



   FIG. 2 shows a cross section along the line II-II in FIG. 1.



   3 shows, as an exemplary embodiment of the device according to the invention for carrying out the method according to the invention, a longitudinal section through the lower part of a spray nozzle with a lateral branching off of the spray channel for thread formation, and
FIGS. 4 and 5 cross sections along the line IV-IV and V-V of FIG.



   The spray head (Fig. 1) consists of two concentric tubes 1, 2, which release a wood-cylindrical feed channel 3 between them for the supply of plastic, which is located at the ends of the tubes in an annular gap in the shell of the spray head, forming a spray nozzle 7 ends, which is slightly tapered towards the jacket and the front end of the spray head.



  The annular gap 7 is surrounded with little play by a support ring 9 for the passage of the pipe 8 to be treated, which is made of paper, cardboard, plastic or other smooth, dimensionally stable material in the form of a band, the band being rolled up in its longitudinal direction to the pipe 8 and its overlapping Edges are joined together. The tube 8 lies close to the end of the outer tube 2 of the spray head, while the end 4 of the inner tube 1 of the spray head with the inner jacket of the tube 8 forms a cylindrical gap 7a corresponding to the thickness of the plastic hose 5 to be injected.



   The thermoplastic material exiting through the annular gap 7 is applied by extrusion in a manner known per se within the pipe 8 and limited in its thickness by the gap 7a in a closed hose 5, the expansion of the pipe 8 being prevented by the support ring 9 surrounding it . After leaving the support ring 9, the hose 5 has hardened on the inside of the tube 8 to such an extent that the packaged goods can be filled in, which takes place via the cavity 10 of the tube 1 of the spray head.

Claims (1)

Aus den Fig. 3 bis 5 ist ein Beispiel für die Ausgestaltung der im Patentanspruch II definierten Vorrichtung zur Durchführung des vorliegenden Verfahrens ersichtlich. Der aus den konzentrischen Rohren 18 und 19 bestehende Spritzkopf weist einen hohlzylindrischen Zuführungskanal 20 auf, der an den Enden 29 und 30 der Rohre 19 bzw. 18 in den im Spritzkopfmantel endigenden Ringspalt 33 übergeht. An example of the configuration of the device defined in claim II for carrying out the present method can be seen from FIGS. The spray head consisting of the concentric tubes 18 and 19 has a hollow cylindrical feed channel 20 which merges at the ends 29 and 30 of the tubes 19 and 18 into the annular gap 33 ending in the spray head jacket. Im Zuführungskanal ist im Abstand vor dem Ringspalt 33 eine Ausmündung 21 vorgesehen, die in eine Spritzdüse 22 endigt, welche gegen den Ring- spalt 33 gerichtet ist und zur Herstellung eines Kunststoffadens dient, der zwischen die überlappten Bandränder 24 des zu bildenden Rohres 27 eintritt, wobei die Lage der Spritzdüse 22 so gewählt ist, dass der Kunststoffaden 23 in der Mitte der zu verschweissenden Bandränder 24 liegt. Zwischen der Spritzdüse 22 und dem Ringspalt 33 sind zwei zum Aneinanderpressen der Bandränder dienende, geheizte Druckrollen 25, 26 angeordnet, so dass das eingerollte Band an seinen Rändern zum Rohr 27 verbunden wird, das an dem Ringspalt 33 vorbeigeführt an seiner Innenseite mit dem in sich geschlossenen Schlauch 32 aus thermoplastischem Kunststoff versehen wird. In the feed channel, at a distance in front of the annular gap 33, an opening 21 is provided which ends in a spray nozzle 22 which is directed against the annular gap 33 and serves to produce a plastic thread that enters between the overlapped band edges 24 of the tube 27 to be formed, wherein the position of the spray nozzle 22 is selected such that the plastic thread 23 lies in the middle of the tape edges 24 to be welded. Between the spray nozzle 22 and the annular gap 33, two heated pressure rollers 25, 26, which are used to press the belt edges together, are arranged so that the rolled-up belt is connected at its edges to form the tube 27, which is guided past the annular gap 33 on its inside with the inside closed tube 32 made of thermoplastic material is provided. PATENTANSPRÜCHE I. Verfahren zur kontinuierlichen Herstellung einer innenseitig mit thermoplastichem Kunststoff kaschierten, rohrförmigen Verpackungshülle unter Verwendung eines Trägerstoffes in Form eines Bandes, das in Längsrichtung zu einem Rohr geformt wird und dessen sich überlappende Ränder miteinander verbunden werden, dadurch gekennzeichnet, dass das Trägerstoffrdhr kontinuierlich über den Spritzkopf einer Spritzmaschine für thermoplastische Massen geführt wird, aus dessen Ringspalt ein Schlauch aus thermoplastischem Kunststoff derart austritt, dass die Innenseite des Trägerstoffrohres von dem Schlauch kaschiert wird. PATENT CLAIMS I. A process for the continuous production of a tubular packaging casing laminated on the inside with thermoplastic plastic using a carrier material in the form of a tape which is formed into a tube in the longitudinal direction and whose overlapping edges are connected to one another, characterized in that the carrier material tube is continuously over the Injection head of an injection molding machine for thermoplastic masses is guided, from whose annular gap a tube made of thermoplastic material emerges in such a way that the inside of the carrier tube is concealed by the tube. II. Vorrichtung zur Durchführung des Verfahrens nach Patentanspruch I, dadurch gekennzeichnet, dass der Spritzkopf einer Strangpresse aus zwei konzentrischen Rohren besteht, die zwischen sich einen hohlzylindrischen Zuführungskanal für den Kunststoff freilassen, welcher Kanal an den Enden der Rohre in einen eine Spritzdüse bildenden Ringspalt endigt, welcher mit Spiel von einem Stützring für den Durchtritt des zu behandelnden Trägerstoffrohres umfasst ist, und dass im Zuführungskanal eine im Abstand von dem Ringspalt angeordnete Ausmündung vorgesehen ist, die mit einer gegen den Ringspalt gerichteten Spritzdüse zur Herstellung eines Kunststoffadens versehen ist, und zwischen der Spritzdüse und dem Ringspalt zwei geheizte, zum Aneinanderpressen der Bandränder dienende Druckrollen angeordnet sind. II. Device for performing the method according to claim I, characterized in that the extrusion head of an extruder consists of two concentric tubes which leave a hollow cylindrical feed channel for the plastic between them, which channel ends at the ends of the tubes in an annular gap forming an injection nozzle , which is encompassed with play by a support ring for the passage of the carrier pipe to be treated, and that in the feed channel an outlet is provided which is arranged at a distance from the annular gap and is provided with a spray nozzle directed towards the annular gap for producing a plastic thread, and between the Spray nozzle and the annular gap two heated pressure rollers used to press the tape edges together are arranged. UNTERANSPRUCH Verfahren nach Patentanspruch I, dadurch gekennzeichnet, dass als Trägerstoff Cellulose Verwendung findet. UNDER CLAIM Method according to patent claim I, characterized in that cellulose is used as the carrier.
CH5359557A 1956-12-20 1957-12-10 Method and device for the continuous production of a tubular packaging casing laminated on the inside with thermoplastic material CH363606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER20222A DE1088223B (en) 1956-12-20 1956-12-20 Method and device for the continuous production of packaging

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CH363606A true CH363606A (en) 1962-07-31

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1221431B (en) * 1958-09-22 1966-07-21 Du Pont Process for applying a thermoplastic coating to the inner surface of an essentially tubular structure
DE1228786B (en) 1958-11-03 1966-11-17 Econosto Nv Device for lining metal pipes with a layer of ebonite or another compressible material
DE1242355B (en) * 1963-10-19 1967-06-15 Schock & Co Gmbh Process for the production of multi-part layer strips
FR2463673A1 (en) * 1979-08-21 1981-02-27 Ollivier Jean PROCESS FOR MANUFACTURING A METAL-PLASTIC COMPOSITE TUBE AND APPARATUS FOR IMPLEMENTING IT

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Publication number Priority date Publication date Assignee Title
US2154521A (en) * 1938-02-15 1939-04-18 Stokes & Smith Co Method of manufacture of filled containers
DE863741C (en) * 1944-03-25 1953-01-19 American Viscose Corp Method and device for the production of stuffing, z. B. of sausages
FR1090540A (en) * 1953-09-10 1955-03-31 Method and installation for providing a non-waterproof tube with a waterproof inner lining

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