CH638132A5 - Welding device for welding plastic webs - Google Patents

Welding device for welding plastic webs Download PDF

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Publication number
CH638132A5
CH638132A5 CH765778A CH765778A CH638132A5 CH 638132 A5 CH638132 A5 CH 638132A5 CH 765778 A CH765778 A CH 765778A CH 765778 A CH765778 A CH 765778A CH 638132 A5 CH638132 A5 CH 638132A5
Authority
CH
Switzerland
Prior art keywords
welding
rollers
welding device
heating
designed
Prior art date
Application number
CH765778A
Other languages
German (de)
Inventor
Wolfgang Neidhart
Original Assignee
Sarna Kunststoff Ag
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 Sarna Kunststoff Ag filed Critical Sarna Kunststoff Ag
Publication of CH638132A5 publication Critical patent/CH638132A5/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2053—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position
    • B29C65/2061—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position by sliding
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2053—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position
    • B29C65/2084—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position by pivoting
    • 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
    • B29C65/82—Testing the joint
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—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
    • B29C66/81433—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 being toothed, i.e. comprising several teeth or pins, or being patterned
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/865—Independently movable welding apparatus, e.g. on wheels
    • B29C66/8652—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling
    • B29C66/86521—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling being self-propelling
    • B29C66/86523—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling being self-propelling the traction being made on the seam
    • 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
    • B29C65/82—Testing the joint
    • B29C65/8207—Testing the joint by mechanical methods
    • B29C65/8246—Pressure tests, e.g. hydrostatic pressure tests
    • 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
    • B29C66/81415—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 bevelled
    • B29C66/81417—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 bevelled being V-shaped
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The device has a housing frame and a heating part for heating the webs. Directly below an upper welding shoe (18), a lower welding shoe (36) is provided which, forming a part of the welding device (1), is firmly joined mechanically to the housing frame (6) or to the upper welding shoe (18) in order, during welding, to form a unit supported exclusively on the material being welded (3, 4) and to achieve reliable and good welding even in the case of a poor substrate. The welding shoes are designed as roller carriages (18, 36). The join is a curved arm, for example a swanneck. A number of the rollers (20, 21; 44, 45) of the roller carriages (18, 36) are driven by a central geared motor, the drive being designed at least in part as a chain drive (68, 69) or as a gearwheel drive. The heated wedge (10) and, for example corrugated, welding rollers (20, 21; 44, 45) are provided in the centre part of the welding shoes. The latter are preferably offset in order to produce a double welder seam with test channel lying in between. A housing (16) serves to cover the retracted heated wedge (10). <IMAGE>

Description

Die vorliegende Erfindung betrifft ein Schweissgerät zum Verschweissen von Kunststoffbahnen, mit Gehäuserahmen und einem Heizteil zum Erhitzen der Bahnen. The present invention relates to a welding device for welding plastic sheets, with a housing frame and a heating part for heating the sheets.

Beim Auskleiden von Bauten, beispielsweise Tunnelbauten, mit Kunststoffbahnen besteht beim Schweissen insofern eine Schwierigkeit, als die zu verschweissenden Kunststoffbahnen eine korrekte Gegenhalterung für das Schweissgerät bzw. Teilen hievon, aufweisen müssen, an-sonst die Schweissnaht fehlerhaft wird. Auszukleidende Bauten weisen im allgemeinen nicht glatte Oberflächen auf, welche als Gegenlager für die Kunststoffbahnen beim Schweiss-vorgang dienen können, so dass man bisher beim Auskleiden derartiger Bauten durch L-förmiges Umbiegen der Bahnenden und deren gegenseitiges Verschweissen der Unterseiten diesem Mangel abzuhelfen versuchte. Dies mag bei dünnen Kunststoffbahnen erfolgreich sein, indem die geschweisste Stelle in eine der Kunststoffbahnebenen umgelegt und dort wiederum angeschweisst wird. Bei dickeren Kunststoffbahnen, beispielsweise in der Dicke von einigen mm, ist dieses Verfahren in der Praxis nicht möglich. When lining buildings, for example tunnels, with plastic sheets, there is a difficulty with welding insofar as the plastic sheets to be welded must have a correct counter-holder for the welding device or parts thereof, otherwise the weld seam will be faulty. Buildings to be lined generally do not have smooth surfaces, which can serve as counter bearings for the plastic webs during the welding process, so that attempts have been made to remedy this deficiency when lining such buildings by bending the web ends in an L-shape and welding them together. This may be successful in the case of thin plastic sheets, in that the welded point is moved to one of the plastic sheet levels and welded there again. In practice, this method is not possible for thicker plastic sheets, for example with a thickness of a few mm.

In diesem Sinne stellt sich die Aufgabe, ein Schweissgerät zu schaffen, welches unabhängig ist von der Beschaffenheit der auszukleidenden Oberfläche und trotzdem gestattet, eine Überlappschweissung der beiden Kunststoffbahnenden in ihrer Mittelebene zu vollziehen, welche Schweissung sowohl qualitativ einwandfrei ist als auch wirtschaftlich durchführbar sein muss. In this sense, there is the task of creating a welding device that is independent of the nature of the surface to be lined and yet allows an overlap welding of the two plastic web ends in their central plane, which welding is both qualitatively flawless and economically feasible.

Ein derartiges Schweissgerät zeichnet sich erfindungsge-mäss dadurch aus, dass unmittelbar unter einem oberen Schweissschuh ein unterer Schweissschuh vorgesehen ist, der einen Teil des Schweissgerätes bildend, mechanisch mit dem Gehäuserahmen oder dem oberen Schweissschuh fest verbunden ist, um beim Schweissen eine sich ausschliesslich auf das Schweissgut abstützende Einheit zu bilden und eine sichere und gute Verschweissung auch bei schlechtem Untergrund zu erreichen. According to the invention, such a welding device is characterized in that a lower welding shoe is provided directly under an upper welding shoe, which is a part of the welding device, is mechanically connected to the housing frame or the upper welding shoe, in order to be able to focus exclusively on the To form a weld-supporting unit and to achieve a safe and good welding even on bad surfaces.

Ein erfindungsgemässes Schweissgerät wird anschliessend beispielsweise anhand von Figuren erläutert. Es zeigen: A welding device according to the invention is subsequently explained, for example, using figures. Show it:

Fig. 1 in teilweise schematischer Darstellung zwei über-einandergelegte Enden von Kunststoffbahnen, in Ansicht längs zur Schweissnaht, wobei die sich über das Figurenblatt fortsetzende untere Kunststoffbahn unmittelbar vor der Schweissmaschine geschnitten ist, 1 shows a partially schematic representation of two superimposed ends of plastic sheets, viewed along the weld seam, the lower plastic sheet continuing over the figure sheet being cut directly in front of the welding machine,

Fig. 2 in rein schematischer Darstellung einen Schnitt durch das Schweissgerät nach Linie II-II der Fig. 1, unter Weglassung von Teilen der Schweissmaschine, 2 is a purely schematic representation of a section through the welding device according to line II-II of FIG. 1, omitting parts of the welding machine,

Fig. 3 in rein schematischer Darstellung einen Ausschnitt aus dem Schweissgerät nach Fig. 1, geschnitten nach Linie III-III, 3 is a purely schematic representation of a section of the welding device of FIG. 1, cut along line III-III,

Fig. 4 eine Seitenansicht des Schweissgerätes in einer praktischen Ausführung, 4 is a side view of the welding device in a practical embodiment,

Fig. 5 das Schweissgerät in perspektivischer Ansicht von oben, mit eingelegten Kunststoffbahnen, 5 the welding device in a perspective view from above, with inserted plastic sheets,

Fig. 6 einen konstruktiven Ausschnitt aus dem Schweissgerät gemäss den Fig. 4 und 5, geschnitten nach der Schnittlinie VI-VI der Fig. 1. 6 shows a constructive section from the welding device according to FIGS. 4 and 5, cut along the section line VI-VI of FIG. 1.

Ein in Fig. 1 sehr vereinfacht dargestelltes Schweissgerät ist in Schweisslage auf eine obere Kunststoffbahn 3 und eine untere Kunststoffbahn 4 aufgebracht, welche Kunststoffbahnen in ihren Enden zu verschweissen sind. Das Schweissgerät 1 weist einen Gehäuserahmen 6 auf, von welchem in den Fig. 1 bis 3 nur eine Geräteplatte 8 teilweise zur Darstellung gelangt. Das Schweissgerät ist mit einem Heizteil z.B. einem Heizkeil 10 zum schweissbaren Erhitzen der miteinander zu verbindenden Kunststoffbahnen 3 und 4 ausgerüstet. Um zwischen diesem Keil 10 und den miteinander zu verschweissenden Kunststoffbahnen 3 und 4 einen guten Kontakt zwecks gleichmässiger Erhitzung sicherzustellen, sind oben und unten als federnde Arme 12, Blattfedern 13, sowie Anpressrollen 14 angeordnet. Hinter dem Heizkeil 10 befindet sich ein Heizkeilgehäuse 16, in welches der Heizkeil 10 beim Ein- und Ausfahren des Schweissgutes rückgezogen werden kann. A welding device shown in a very simplified manner in FIG. 1 is applied in the welding position to an upper plastic sheet 3 and a lower plastic sheet 4, which ends of the plastic sheets are to be welded. The welding device 1 has a housing frame 6, of which only one device plate 8 is partially shown in FIGS. 1 to 3. The welding machine is equipped with a heating part e.g. equipped with a heating wedge 10 for the weldable heating of the plastic sheets 3 and 4 to be joined together. In order to ensure good contact between this wedge 10 and the plastic webs 3 and 4 to be welded to one another for the purpose of uniform heating, resilient arms 12, leaf springs 13 and pressure rollers 14 are arranged above and below. Behind the heating wedge 10 there is a heating wedge housing 16 into which the heating wedge 10 can be withdrawn when the weld metal is retracted and extended.

Ein oberer Schweissschemel 18 ist mit einer vorderen Schweissrolle 20 und einer hinteren Schweissrolle 21 versehen. Dies sind je an einem Winkelhebel 23 und 24 befestigt. Diese Winkelhebel 23,24 sind mit je einer zum Ge5 An upper welding stool 18 is provided with a front welding roller 20 and a rear welding roller 21. These are each attached to an angle lever 23 and 24. These angle levers 23, 24 are each one for Ge5

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häuserahmen 6 gehörenden Lasche 26 bzw. 27 schwenkbar verbunden, so dass sie je um eine Achse 29 bzw. 30 verschwenkt werden können. Eine zwischen den Winkelhebeln 23 und 24 angeordnete, einstellbare Druckfeder 32 ist bestrebt, die beiden Schweissrollen 20 und 21 gleichmässig gegen die obere Fläche der oberen Kunststoffbahn 3 zu pressen. Um das Schweissgerät von den Kunststoffbahnen 3 und 4 auszufahren, sind zwei Handgriffe 33 und 34 vorgesehen, welche entgegen dem Druck der Feder 32 die Schweissrollen 20 und 21 von den Bahnen 3 und 4 abheben. house frame 6 belonging tab 26 and 27 pivotally connected so that they can each be pivoted about an axis 29 or 30. An adjustable compression spring 32 arranged between the angle levers 23 and 24 endeavors to press the two welding rollers 20 and 21 evenly against the upper surface of the upper plastic sheet 3. In order to extend the welding device from the plastic webs 3 and 4, two handles 33 and 34 are provided, which lift the welding rollers 20 and 21 from the webs 3 and 4 against the pressure of the spring 32.

Unmittelbar unter dem oberen Schweissschemel 18 befindet sich ein unterer Schweissschemel 36. Er ist mit zwei parallel liegenden Traversen 38 versehen, von welchen nur die eine sichtbar ist. Diese sind über eine Lasche 40 mit dem Fahrgestell des unteren Schweissschemels 36 verbunden, wobei die Traversen 38 an ihren Enden eine vordere und eine hintere Schweissrolle 44 und 45 tragen, während in der Mitte ein Antriebsdoppelritzel 41 schematisch dargestellt ist. Der untere Schweissschemel 36 ist am unteren Gehäuserahmen 6 befestigt. Dies erfolgt mittels eines schematisch dargestellten Verbindungsträgers 47 in Form eines sog. Schwanenhalses. Der ungefähre Verlauf des Schwanenhalses geht aus Fig. 2 hervor. Fig. 3 zeigt an den Schweissrollen 20 und 44 je ein SchweissroIIenkettenritzel 49 bzw. 76. In dieser Fig. ist ferner die bei der Überlappschweissung der beiden Kunststoffbahnen 3 und 4 aufgrund entsprechender Formgebung der Schweissrollen 20 und 44 erhaltene Doppelschweissnaht 52 sowie der dazwischenliegende, als Prüfkanal 54 ausgebildete, ungeschweisste Teil ersichtlich. Immediately below the upper welding bolster 18 is a lower welding bolster 36. It is provided with two parallel crossbeams 38, only one of which is visible. These are connected to the undercarriage of the lower welding bolster 36 via a bracket 40, the crossbeams 38 carrying at their ends a front and a rear welding roller 44 and 45, while a drive double pinion 41 is shown schematically in the middle. The lower welding stool 36 is fastened to the lower housing frame 6. This is done by means of a schematically illustrated connection carrier 47 in the form of a so-called gooseneck. The approximate course of the gooseneck is shown in Fig. 2. FIG. 3 shows a welding roller chain sprocket 49 and 76, respectively, on the welding rollers 20 and 44. In this FIG., The double welding seam 52 obtained during the overlap welding of the two plastic webs 3 and 4 due to the corresponding shaping of the welding rollers 20 and 44, as well as the intermediate one, is shown as Test channel 54 trained, unwelded part can be seen.

Um ein gutes Greifen der Schweissrollen auf dem zu schweissenden Material sicherzustellen, werden diese an ihrer Oberfläche gekordelt. In order to ensure a good grip of the welding rolls on the material to be welded, they are corded on their surface.

In der in Fig. 4 dargestellten Seitenansicht eines ausgeführten Schweissgerätes ist ein Teil der in den Fig. 1 bis 3 dargestellten Teile ersichtlich und mit gleichen Bezugszeichen versehen. Ferner zeigt Fig. 4 am Gehäuserahmen 6 ausser der Geräteplatte 8 auch einen Bügel 56 sowie vorn und hinten an der Geräteplatte 8 befestigte Laufräder 58. Ein Getriebemotor 60 dient dem Antrieb, d.h. der Fortbewegung des Schweissgerätes. Vom Getriebemotor (Fig. 5) ausgehend, sitzt auf dessen Ausgangswelle ein erstes Antriebsritzel 61 mit einem ersten Kettentrieb 62 sowie ein zweites Antriebsritzel 63 mit einem zweiten Kettentrieb 64. Der erste Kettentrieb 62 treibt ein Ritzel 66 zum Antrieb des unteren Schweissschemels 36, wie dies im Detail anhand der Fig. 6 später erläutert wird. Von diesem Antrieb ist in Fig. 4 ein Kettentrieb 68 zum Antrieb der vorderen Schweissrolle 44 des unteren Schemels 36 sowie ein Kettentrieb 69 zum Antrieb der entsprechenden hinteren Schweissrolle 45 ersichtlich. Ein Klemmhebel 71 dient dazu, den Heizkeil 10 in das Heizkeilgehäuse 16 zurückzuziehen, um das Einführen der Kunststoffbahnen 3 und 4 ohne Berührung des warmen Heizkeils 10 zu ermöglichen. Zum Antrieb der Schweissrollen 20 und 21 des oberen Schemels 18 sind ferner zwei Kettentriebe 73 und 74 dargestellt, welche durch das zweite Antriebsritzel 63 und den zweiten Kettentrieb 64, die in Fig. 5 ersichtlich sind, angetrieben werden. In the side view of a welding device shown in FIG. 4, part of the parts shown in FIGS. 1 to 3 can be seen and provided with the same reference numerals. Furthermore, Fig. 4 shows on the housing frame 6, in addition to the device plate 8, a bracket 56 and wheels 58 attached to the front and rear of the device plate 8. A geared motor 60 is used to drive, i.e. the movement of the welding machine. Starting from the geared motor (FIG. 5), a first drive pinion 61 with a first chain drive 62 and a second drive pinion 63 with a second chain drive 64 sit on its output shaft. The first chain drive 62 drives a pinion 66 for driving the lower welding bolster 36, as is the case here will be explained in detail later with reference to FIG. 6. From this drive, a chain drive 68 for driving the front welding roller 44 of the lower bolster 36 and a chain drive 69 for driving the corresponding rear welding roller 45 can be seen in FIG. A clamping lever 71 serves to pull the heating wedge 10 back into the heating wedge housing 16 in order to enable the plastic sheets 3 and 4 to be inserted without touching the warm heating wedge 10. For driving the welding rollers 20 and 21 of the upper stool 18, two chain drives 73 and 74 are also shown, which are driven by the second drive pinion 63 and the second chain drive 64, which can be seen in FIG. 5.

In Fig. 6 ist ein Schnitt durch den unteren Schweissschemel 36 ersichtlich mit den entsprechenden Antriebsteilen und dem Verbindungselement vom Schemel 36 zum Gehäuserahmen 6 des Schweissgerätes. Das vom ersten Kettentrieb 62 angetriebene Ritzel 66 (Fig. 5) ist über eine Welle 79 mit einem Kegelritzel 80 versehen, das im Eingriff mit einem Kegelritzel 81 steht und eine Welle 82 mit einem Kegelritzel 83 antreibt. Dieser Ritzel 83 wiederum kämmt mit einem Kegelritzel 84 und treibt damit eine Welle 85 an, auf deren freiem Ende das Antriebsdoppelritzel 41 sitzt (Fig. 4). Von diesem wirken über die Kettentriebe 68 und 69 die Antriebe auf die Kettenritzel 76 und 77, welche ihrerseits die Wellen und damit die beiden Schweissrollen 44 und 45 antreiben. 6 shows a section through the lower welding stool 36 with the corresponding drive parts and the connecting element from the stool 36 to the housing frame 6 of the welding device. The pinion 66 (FIG. 5) driven by the first chain drive 62 is provided via a shaft 79 with a bevel pinion 80 which is in engagement with a bevel pinion 81 and drives a shaft 82 with a bevel pinion 83. This pinion 83 in turn meshes with a bevel pinion 84 and thus drives a shaft 85, on the free end of which the double drive pinion 41 is seated (FIG. 4). From this, the drives act on the chain sprockets 76 and 77 via the chain drives 68 and 69, which in turn drive the shafts and thus the two welding rollers 44 and 45.

In Fig. 6 sind auch noch Teile des Gehäuserahmens 6 ersichtlich sowie die als Haarnadelblattenfeder ausgebildeten Federn 13, welche gleichzeitig die Arme 12 bilden, sowie die unter dem Druck dieser Federn stähenden Anpressrollen 14. 6 also shows parts of the housing frame 6 as well as the springs 13 designed as hairpin leaf springs, which simultaneously form the arms 12, and the pressure rollers 14 standing under the pressure of these springs.

Der Verbindungsträger 47, hier als Schwanenhals ausgebildet, stellt eine starre Verbindung des unteren Schweissschemels 36 mit dem Gehäuserahmen 6 dar, eine Konstruktion, die es ermöglicht, die beiden Kunststoffbahnen 3 und 4 im Sinne der Fig. 5 mittels des unteren Schemels 36 zu untergreifen und damit zum oberen Schweissschemel 18 ein von der auszukleidenden Oberfläche völlig unabhängiges Gegenlager zu bilden. The connection carrier 47, here designed as a gooseneck, represents a rigid connection of the lower welding stool 36 to the housing frame 6, a construction which makes it possible to grip under the two plastic sheets 3 and 4 in the sense of FIG. 5 by means of the lower stool 36 and to form a counter bearing completely independent of the surface to be lined with the upper welding bolster 18.

Ein derartiges Schweissgerät bedarf einer Abstützung auf dem auszukleidenden Grunde nicht mehr, sondern ist einzig und allein auf den zwei zu verbindenden Kunststoffbahnen 3 und 4 abgestützt, wobei die beiden Laufräder 58 auf der unteren Kunststoffbahn 4 laufen, während der Schwanenhals 47 den in Fig. 5 nicht sichtbaren unteren Schweissschemel 36 und die entsprechenden Antriebs- und Befestigungsteile mit dem Geräterahmen 6 verbindet. Such a welding device no longer needs to be supported on the base to be lined, but is supported solely on the two plastic webs 3 and 4 to be connected, the two running wheels 58 running on the lower plastic web 4, while the gooseneck 47 runs in FIG. 5 not visible lower welding stool 36 and the corresponding drive and fastening parts with the device frame 6 connects.

Während in Fig. 4 der Klemmhebel 71 die Stellung anzeigt, in der sich der Heizkeil 10 im Heizkeilgehäuse 16 befindet und somit ein Einführen der Kunststoffbahnen 3 und 4 ermöglicht, zeigt die Fig. 5 den Hebel 71 in abgeklappter Lage, in der der Heizkeil 10 in Arbeitsstellung ist. Auch sind die Handgriffe 33 und 34 frei, so dass die Druckfeder 32, wie in Fig. 5 ersichtlich, die beiden Winkelhebel 23 und 24 und damit die Schweissrollen 20 und 21 auf die obere Kunststoffbahn 3 presst, wobei die Schweissrollen 44 und 45 des unteren Schemels 36 als Widerlager dienen. While the clamping lever 71 in FIG. 4 shows the position in which the heating wedge 10 is located in the heating wedge housing 16 and thus allows the plastic sheets 3 and 4 to be inserted, FIG. 5 shows the lever 71 in the folded-down position, in which the heating wedge 10 is in working position. The handles 33 and 34 are also free, so that the compression spring 32, as can be seen in FIG. 5, presses the two angle levers 23 and 24 and thus the welding rollers 20 and 21 onto the upper plastic web 3, the welding rollers 44 and 45 of the lower one Stool 36 serve as an abutment.

Zum Einführen, bzw. zum Herausnehmen des Schweissgerätes bezüglich der Kunststoffbahnen 3 und 4 wird der Heizkeil 10 in das Heizkeilgehäuse 16 eingezogen. Dies erlaubt einen störungsfreien Einzug des zu schweissenden Materials. To insert or remove the welding device with respect to the plastic sheets 3 and 4, the heating wedge 10 is drawn into the heating wedge housing 16. This allows the material to be welded to be drawn in without any problems.

Der Heizkeil 10 kann zwecks Reinigung mühelos aus der Vorrichtung herausgezogen werden, wobei die Führung des Heizkeils ein richtiges Wiederplatzieren bezüglich der Schweissschemel sicherstellt. The heating wedge 10 can be easily pulled out of the device for cleaning, the guidance of the heating wedge ensuring correct repositioning with respect to the welding stool.

Während des Schweissvorganges treibt der Motor 60 über die Schweissrollen 20,21,44 und 45 das Schweissgerät 1 an, wobei der Heizkeil 10 jeweils die vor den Schweissrollen liegenden Teile der Kunststoffbahnen 3 und 4 schweiss-weich erhitzt und anschliessend die unmittelbar folgenden Schweissrollen 20 und 44, entsprechend ihrer Form die Doppelschweissnaht 52 bilden. Zwischen dieser Naht 52 liegt der Prüfkanal 54, an den eine Druckluftquelle angesetzt werden kann, um die Dichte der Schweissnaht 52 zu prüfen. During the welding process, the motor 60 drives the welding device 1 via the welding rollers 20, 21, 44 and 45, the heating wedge 10 heating the parts of the plastic sheets 3 and 4 lying in front of the welding rollers so as to be soft to weld and then the immediately following welding rollers 20 and 44, form the double weld seam 52 according to their shape. Between this seam 52 lies the test channel 54, to which a compressed air source can be attached in order to test the density of the weld seam 52.

Da der Heizkeil über eine Temperaturregelung jederzeit betriebsbereit gehalten wird, beginnt sofort nach dem Anbringen des Schweissgerätes in der beschriebenen Art und Weise der Schmelzvorgang. Durch das Betätigen eines Schalters am Gerät wird der Motor in Betrieb gesetzt. Damit beginnt sich das Gerät zu verschieben, und der Ablauf des Schmelzens und Zusammenpressens erfolgt kontinuierlich, wobei durch die unmittelbare Folge kein Luftzutritt möglich ist und dementsprechend keine Oxydierung stattfinden kann. Since the heating wedge is kept ready for operation at any time by means of a temperature control, the melting process begins immediately after the welding device has been attached in the manner described. The motor is started by pressing a switch on the device. The device then begins to shift, and the melting and pressing process takes place continuously, with the immediate consequence preventing air from entering and, accordingly, no oxidation being able to take place.

Es ist natürlich möglich, durch Auswechseln der Schweissrollen eine einfache, gegebenenfalls breitere Schweissnaht zu erstellen, oder mehrfache Nähte. Entsprechend ist auch der Heizkeil 10 auszuwechseln. It is of course possible to create a simple, possibly wider weld seam by changing the welding rollers, or multiple seams. The heating wedge 10 must also be replaced accordingly.

Die Anforderungen an ein derartiges Schweissgerät bestehen in der Möglichkeit, eine dauerhafte, dichte Zusammenfügung von zwei überlappt aufeinandergelegten Materialien, insbesondere Thermoplasten, zu ermöglichen. The requirements for such a welding device consist in the possibility of permitting a permanent, tight assembly of two overlapping materials, in particular thermoplastics.

5 5

10 10th

15 15

20 20th

25 25th

30 30th

35 35

40 40

45 45

50 50

55 55

60 60

65 65

638132 638132

4 4th

Dabei soll die Schweissnaht mit Druckluft auf Dichtheit prüfbar sein. Zudem soll das Gerät bei stillstehenden Bahnen mit eigenem Antrieb sich mit Schweissgeschwindigkeiten vorwärtsbewegen können oder bei stillstehendem Gerät die Bahnen mit entsprechender Geschwindigkeit bewegen. Im weiteren soll es sowohl als Links- als auch als Rechtsgerät zusammenbaubar sein. Im weiteren wird von einem derartigen Gerät gefordert, dass es bis zur sechsfachen Verdik-kung der Nenndicke des Schweissgutes im gleichen Arbeitsgang verarbeiten kann. The weld seam should be able to be checked for leaks with compressed air. In addition, the device should be able to move forward at welding speeds when the webs are stationary with its own drive or move the webs at the appropriate speed when the machine is at a standstill. Furthermore, it should be able to be assembled as a left-hand as well as a right-hand device. Furthermore, such a device is required to be able to process up to six times the nominal thickness of the weld metal in the same operation.

Ein derartiges Gerät ist auf jedem Untergrund, ob gut s oder schlecht, verwendbar, d.h. auf Kies, Sand, Fels, grobem Beton usw., da dieser Untergrund für die Qualität der Schweissung nicht massgebend ist. Such a device can be used on any surface, good or bad, i.e. on gravel, sand, rock, coarse concrete, etc., as this substrate is not decisive for the quality of the weld.

s s

3 Blatt Zeichnungen 3 sheets of drawings

Claims (11)

638 132638 132 1. Schweissgerät zum Verschweissen von Kunststoffbahnen, mit Gehäuserahmen und einem Heizteil zum Erhitzen der Bahnen, dadurch gekennzeichnet, dass unmittelbar unter einem oberen Schweissschuh (18) ein unterer Schweissschuh (36) vorgesehen ist, der, einen Teil des Schweissgerätes (1) bildend, mechanisch (47) mit dem Gehäuserahmen (6) oder dem oberen Schweissschuh (18) fest verbunden ist, um beim Schweissen eine sich ausschliesslich auf das Schweissgut (3, 4) abstützende Einheit zu bilden und eine sichere und gute Verschweissung auch bei schlechtem Untergrund zu erreichen. 1. A welding device for welding plastic sheets, with a housing frame and a heating part for heating the sheets, characterized in that a lower welding shoe (36) is provided directly under an upper welding shoe (18), which forms part of the welding device (1), mechanically (47) is firmly connected to the housing frame (6) or the upper welding shoe (18) in order to form a unit which is supported exclusively on the weld metal (3, 4) during welding and to ensure safe and good welding even on poor surfaces to reach. 2. Schweissgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Schweissschuhe als Rollenschemel (18, 36) ausgebildet sind. 2. Welding device according to claim 1, characterized in that the welding shoes are designed as roller stools (18, 36). 2 2nd PATENTANSPRÜCHE PATENT CLAIMS 3. Schweissgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Verbindung als gebogener Arm, z.B. als Schwanenhals (47) ausgebildet ist. 3. Welding device according to claim 1, characterized in that the connection as a curved arm, e.g. is designed as a gooseneck (47). 4. Schweissgerät nach Anspruch 2, dadurch gekennzeichnet, dass mindestens eine Anzahl der Rollen (20,21; 44,45) der Rollenschemel (18, 36) durch einen zentralen Getriebemotor (60) angetrieben sind. 4. Welding device according to claim 2, characterized in that at least a number of the rollers (20,21; 44,45) of the roller stool (18, 36) are driven by a central geared motor (60). 5. Schweissgerät nach Anspruch 4, dadurch gekennzeichnet, dass der Antrieb zumindest zum Teil als Kettenantrieb (61, 62, 63, 64) oder als Zahnradantrieb (80, 81, 82, 83, 84) ausgebildet ist. 5. Welding device according to claim 4, characterized in that the drive is at least partially designed as a chain drive (61, 62, 63, 64) or as a gear drive (80, 81, 82, 83, 84). 6. Schweissgerät nach Anspruch 1, dadurch gekennzeichnet, dass der Heizteil (10) und, z.B. geriffelte, Schweissrollen (20,21; 44,45) im Mittelteil der Schweissschuhe vorgesehen und diese vorzugsweise abgesetzt sind, um eine Doppel-schweissnaht (52) mit dazwischenliegendem Prüfkanal (54) zu erzeugen. 6. Welding device according to claim 1, characterized in that the heating part (10) and, e.g. corrugated, welding rollers (20, 21; 44, 45) are provided in the middle part of the welding shoes and these are preferably offset in order to produce a double weld seam (52) with a test channel (54) in between. 7. Schweissgerät nach Anspruch 1, gekennzeichnet durch ein Gehäuse (16) zum Abdecken des zurückgezogenen Heizteiles (10). 7. Welding device according to claim 1, characterized by a housing (16) for covering the retracted heating part (10). 8. Schweissgerät nach Anspruch 1, dadurch gekennzeichnet, dass Schweissrollen angeordnet sind und dass die Schweissrollen (20,21) des oberen Schweissschemels (18) durch die Kraft der gleichen Feder (32) auf das Schweissgut (3,4) gepresst werden, wobei die Schweissrollen (44,45) des unteren Schemels (36) als Widerlager dienen. 8. Welding device according to claim 1, characterized in that welding rollers are arranged and that the welding rollers (20, 21) of the upper welding stool (18) are pressed onto the weld metal (3, 4) by the force of the same spring (32), wherein the welding rollers (44, 45) of the lower stool (36) serve as abutments. 9. Schweissgerät nach Anspruch 1, dadurch gekennzeichnet, dass Schweissrollen vorgesehen sind und vor den Schweissrollen (20,44) beidseits des, vorzugsweise als Heizkeil ausgebildeten Heizteils (10) Pressrollen (14) angeordnet sind, um die zu verschweissenden Bahnen (3,4) auf den Teil (10) zu pressen, wobei die Pressung vorzugsweise durch Blattfedern (13) erfolgt. 9. Welding device according to claim 1, characterized in that welding rollers are provided and pressure rollers (14) are arranged in front of the welding rollers (20, 44) on both sides of the heating part (10), which is preferably designed as a heating wedge, in order to weld the webs (3, 4 ) to press on the part (10), the pressing preferably being carried out by leaf springs (13). 10. Schweissgerät nach Anspruch 1, dadurch gekennzeichnet, dass das Gerät (1) zur Abstützung auf der Kunststoffbahn (4) mit Laufrädern (58) versehen ist. 10. Welding device according to claim 1, characterized in that the device (1) for support on the plastic sheet (4) is provided with wheels (58). 11. Schweissgerät nach Anspruch 1, dadurch gekennzeichnet, dass der Heizteil als Heizkeil ausgebildet ist. 11. Welding device according to claim 1, characterized in that the heating part is designed as a heating wedge.
CH765778A 1976-01-30 1978-07-14 Welding device for welding plastic webs CH638132A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH118176A CH608417A5 (en) 1976-01-30 1976-01-30 Welding device for welding plastic webs

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CH118176A CH608417A5 (en) 1976-01-30 1976-01-30 Welding device for welding plastic webs
CH765778A CH638132A5 (en) 1976-01-30 1978-07-14 Welding device for welding plastic webs

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4004658A1 (en) * 1990-02-15 1991-08-29 Huels Troisdorf HEATING WEDGE WELDING MACHINE
DE9317104U1 (en) * 1993-11-09 1994-02-10 Kaminski, Renald, 52511 Geilenkirchen Device for welding film edges
EP3381661B1 (en) * 2017-03-28 2020-03-11 Leister Technologies AG Mobile heated wedge welder, heating wedge and welding method

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CH608417A5 (en) 1979-01-15
ATA386476A (en) 1979-01-15

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