CH667422A5 - Schweissgeraet zum verschweissen von kunststoffbahnen. - Google Patents

Schweissgeraet zum verschweissen von kunststoffbahnen. Download PDF

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Publication number
CH667422A5
CH667422A5 CH4319/85A CH431985A CH667422A5 CH 667422 A5 CH667422 A5 CH 667422A5 CH 4319/85 A CH4319/85 A CH 4319/85A CH 431985 A CH431985 A CH 431985A CH 667422 A5 CH667422 A5 CH 667422A5
Authority
CH
Switzerland
Prior art keywords
welding
heating
heating elements
wedge
control
Prior art date
Application number
CH4319/85A
Other languages
English (en)
Inventor
Walter Dipl-Ing Neumueller
Friedrich Liebl
Original Assignee
Neumueller Walter
Friedrich Liebl
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 Neumueller Walter, Friedrich Liebl filed Critical Neumueller Walter
Publication of CH667422A5 publication Critical patent/CH667422A5/de

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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
    • 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
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • 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
    • B29C66/01—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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—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
    • B29C66/81427—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 comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining tool
    • 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
    • B29C66/91421—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 joining tools
    • 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
    • B29C66/91431—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 the temperature being kept constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • 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
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/932—Measuring or controlling the joining process by measuring or controlling the speed by measuring the speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93451—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed by controlling or regulating the rotational speed, i.e. the speed of revolution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81469—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed next to the other in a single line transverse to the feed direction, e.g. shoulder to shoulder sonotrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91212—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
    • B29C66/91213—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws and measuring the electrical resistance of a resistive element belonging to said welding jaws, said element being, e.g. a thermistor
    • 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
    • B29C66/91421—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 joining tools
    • B29C66/91423—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 joining tools using joining tools having different temperature zones or using several joining tools with different temperatures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B29C66/91643—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile
    • B29C66/91645—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile by steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/922—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9221—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force or the mechanical power
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1737—Discontinuous, spaced area, and/or patterned pressing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1741—Progressive continuous bonding press [e.g., roll couples]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1788—Work traversing type and/or means applying work to wall or static structure

Landscapes

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

Description

BESCHREIBUNG
Die Erfindung betrifft ein Schweissgerät zum Verschweissen von Kunststoffbahnen durch mindestens zwei im Abstand angeordnete Schweissnähte, bestehend aus einem Geräterahmen einer vor der Verschweissungsstelle längsverschiebbar angeordneten Heizeinrichtung mit mindestens zwei im Abstand angeordneten Schweisskeilen und aus einander gegenüberliegenden und aneinander anpressbaren, durch einen Motor angetriebenen Andrückrollen.
Zur Probe der Dichtheit der Schweissnähte wird der Raum zwischen den beiden Schweissnähten mit Druckluft oder anderen Medien gefüllt und der Druck über eine vorgegebene Zeit gemessen.
Bei den bekannten Schweissgeräten ergeben sich an den beiden im Abstand angeordneten Schweisskeilen des Heizgerätes unterschiedliche jedenfalls nicht kontrollierbare Betriebstemperaturen, so dass die parallel zueinander verlaufenden Schweissnähte eine unterschiedliche Qualität aufweisen, weshalb die beiden Nähte bei der Dichtheitsprobe nicht das erwünschte gleichartige Verhalten zeigen.
Die Aufgabe der vorliegenden Erfindung liegt nun in der Schaffung eines eingangs beschriebenen Schweissgerätes, mit welchem die parallel zueinander verlaufenden Schweissnähte in hohem Masse qualitativ gleichwertig ausgebildet werden können.
Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass in jedem Schweisskeil der Heizeinrichtung voneinander getrennte und unabhängig voneinander thermostatisch steuerbare Heizelemente angeordnet sind. Mit einer derartigen Zwei- oder Mehrfachausbildung kann nun unabhängig von verschiedenen partiellen Temperaturunterschieden im Bereich der zu verschweissenden Kunststoffbahnen für jeden Schweissnahtbereich die exakt gleiche Schweisstempe-ratur eingestellt werden. Damit sind qualitativ insbesondere bezüglich der Reissfestigkeit gleichwertige Schweissnähte erreichbar, was für die an die Schweissung anschliessende Dichtheitsprobe von grosser Bedeutung ist.
Gemäss einer bevorzugten Ausführungsform der Erfindung sind die Heizelemente in an sich bekannter Weise mittels Thyristoren steuerbar, wodurch auf eine einfache Weise die Temperaturen der Schweisskeile eingestellt werden können.
Eine andere vorteilhafte Ausbildung der Erfindung besteht auch darin, dass zwischen den keramisch ausgeführten Heizelementen ein weiterer Heizkörper vorgesehen ist, wobei dei beiden Heizelemente im Bereich des keilförmigen Endes über den mittleren Heizkörper vorstehend ausgebildet sind. Dieses weitere Heizelement dient als Vorheizung der Heizeinrichtung sowie zur leichteren Konstanthaltung der eigentlichen, aus Aluminium gebildeten Schweisszungen. Durch die Vorsprünge im Bereich der beiden Heizelemente ist eine gegenseitige störende Einfiussnahme ausgeschlossen, wobei bei kleineren Winkeln des Keiles auch eine längere Kontaktzone zur besseren Wärmeübertragung auf die darüber gleitenden Kunststoffbahnen gegeben ist.
Im folgenden wird die Erfindung an Hand eines in der Zeich-s nung dargestellten Ausführungsbeispieles näher beschrieben.
Es zeigen:
Figur 1 eine Vorderansicht eines erfindungsgemäss ausgebildeten Schweissgerätes;
Figur 2 eine Draufsicht auf das Schweissgerät nach Figur 1 ; 10 Figur 3 eine vergrösserte Draufsicht auf die erfindungsgemässe Heizeinrichtung;
Figur 4 eine schematische Querschnittsdarstellung der Heizeinrichtung nach Figur 3 ;
Figur 5 schematisch ein Blockschaltbild des Steuergerätes; und 15 Figur 6 schematisch ein Blockschaltbild einer Ansteuerschaltung.
Das Schweissgerät 1 besteht aus einem Geräterahmen 2 mit oberen und unteren Andrückrollen 3,4 und einem Steuergerät 5. Der Geräterahmen 2 setzt sich aus zwei parallel zueinander verlaufenden, im Querschnitt rechteckigen Rahmenprofilen 6, 7 zusam-20 men, die in ihrem hinteren Endbereich durch ein querverlaufendes Rohr miteinander verbunden sind. Das Rahmenprofil 6 ist starr mit dem Rohr 9 verbunden, wogegen das andere Rahmenprofil 7 um die Achse 10 des Rohres 9 verschwenkt wird. Das Rahmenprofil 7 ist mittels einer in einem Schlitz des Rohres 9 gehaltenen Blattfeder 60, 25 die gegen die Innenwand des hohlen Rahmenprofils 7 drückt, vorgespannt, wodurch die Andrückrollen 3, 4 aneinandergepresst werden.
Im vorderen Endbereich der beiden Rahmenprofile 6 ist jeweils ein Motor 11, 12 und ein Planetengetriebe 13,14 angeordnet, woran 30 sich jeweils die Andrückrollen 3,4 anschliessen. Die Achse der beiden Andrückrollen 3, 4 verläuft koaxial mit der Motorachse. Jede Andrückrolle 3,4 besteht aus zwei voneinander distanzierten Rädern aus Gummi. Es können jedoch ebenso mehrere Räder vorgesehen werden, sofern Mehrfach-Schweissnähte gewünscht werden. 35 Am rechten Rahmenprofil 6 ist über zwei Winkel 15 (von denen in Figur 2 der besseren Übersicht halber nur ein Teil dargestellt ist) ein Handgriff 16 mit einem Schalter 17 befestigt. Zur Anspeisung der Motoren 11,12 und einer zwei Schweisszungen 22 aufweisenden Heizeinrichtung 19 führt eine mehradrige Leitung 18 von dem 40 Steuergerät 5 zum Schalter 17 und von diesem über einen hohl ausgebildeten Winkel 15 zu den beiden Motoren 11,12 und zu der mittig angeordneten Heizeinrichtung 19. Diese ist keilförmig ausgebildet und über eine Parallelogrammanlenkung 61 längsverschiebbar am Rahmenprofil 6 befestigt. Zur Führung der Heizeinrichtung 19 45 sind an den Rahmenprofilen 6, 7 befestigte Führungstifte 20 vorgesehen.
Die in Figuren 3 und 4 vergrössert dargestellte Heizeinrichtung 19 besteht aus einem Aluminiumkörper 21 mit zwei Schweisskeilen 22. In diesen Schweisskeilen 22 sind keramische Heizelemente 23,24 50 vorgesehen, deren Temperatur jeweils unabhängig elektronisch regelbar ist. Zur Unterstützung der Heizleistung befindet sich zwischen den Heizelementen 23,24 ein stabilisierter, gesteuerter, ebenfalls keramisch ausgeführter Heizkörper 25, der zur leichteren Konstanthaltung der Schweisstemperatur (von etwa 280 bis 290° C) 55 dient. Die gesamte Heizleistung der Heizeinrichtung 19 beträgt dreimal 80 W. Diese Leistung wird über die Steuerleitung 18 galvanisch getrennt angespeist.
Um den Synchronlauf der beiden Motore 11,12 zu gewährleisten, ist jeder der beiden Motore mit einem nicht dargestellten Dreh-60 zahlfühler ausgerüstet, die über Leitungen mit dem Steuergerät 5 verbunden sind, das schematisch in Figur 5 dargestellt ist.
Diese Drehzahlfühler sind an die Klemmen 30, 30' des Steuergerätes 5 angeschlossen und liefern der Drehzahl des zugehörigen Motors 11,12 entsprechende Signale, wobei diese Motoren über An-65 steuerschaltungen 33, 35 mit Strom versorgt werden. Dabei sind die Ausgänge der beiden Ansteuerschaltungen 33 und 35 mit den Klemmen 34, 36 verbunden, an denen je einer der beiden Motore angeschlossen ist. Diese Ansteuerschaltungen liefern einen dem an
3
667 422
gelegten Steuersignal entsprechenden Strom und können z. B. durch Transistoren gebildet sein.
Die-Ansteuerschaltung 33 ist mit einem Sollwertgeber 32 verbunden und versorgt den als Leitmotor dienenden Motor, wogegen die Ansteuerschaltung 35 mit dem Ausgang eines Soll-Istwert-Reglers 5 31 verbunden ist, dem das Signal des dem Leitmotor zugeordneten Drehzahlfühlers als Sollwert und das Signal des dem vom Leitmotor abhängigen Motor zugeordneten Drehzahlfühlers als Istwert zugeführt wird. Dieser Regler 31 liefert daher an seinem Ausgang ein Steuersignal, dessen Grösse für den synchronen Lauf der beiden 10 Motore 11,12 sorgt und das der Ansteuerschaltung 35 zugeführt wird.
Die Gleichspannungsversorgung des Soll-Istwert-Reglers 31 wie auch der Ansteuerschaltungen 33, 35 und des Sollwertgebers 32, der z. B. durch ein Potentiometer gebildet sein kann, erfolgt über eine 15 Gleichrichterschaltung 46, die an die an eine Wechselspannungsquelle angeschlossene Klemme 45 des Steuergerätes 5 angeschlossen ist.
Weiters sind an den Klemmen 40, 40' und 40" im Bereich der beiden Schweisszungen 22 und dem Mittelteil der Heizeinrichtung 19 2o angeordnete Temperaturfühler RT, RT', RT" z. B. Thermistoren angeschlossen, welche Klemmen 40, 40', 40" mit den Klemmen 54 einer Ansteuerschaltung 50 für je einen Thyristor T3, T3', T3" verbunden sind, die den Stromfluss durch die an den Klemmen 44,44', 44" des Steuergerätes 5 angeschlossenen Heizelemente 23, 24,25 2s steuern.
An den Klemmen 51, 52 der Ansteuerschaltungen 50 sind Sollwertgeber RP, RP', RP" angeschlossen, die z. B. durch einstellbare Widerstände gebildet sein können. Die Klemme 55 der Ansteuerschaltung 50 ist mit Masse verbunden, mit der auch der Temperatur- 30 fühler RT, RT', RT" und die Heizelemente 23, 24, 25 verbunden sind.
Die den Steuerausgang bildende Klemme 56 ist mit der Steuerelektrode des Thyristors T3, T3', T3" verbunden, und an der Klemme 51 liegt eine Wechselspannung an.
Wie aus Figur 5 ersichtlich ist, sind alle drei Heizelemente 23, 24, 25 unabhängig voneinander gesteuert bzw. geregelt. Bei der dargestellten Ausführungsform sind drei Sollwertgeber vorgesehen, die aber zweckmässigerweise in einer nicht dargestellten Weise mechanisch miteinander gekoppelt sind, um eine gleiche Sollwerteinstellung für jedes Heizelement zu ermöglichen. Es ist aber auch durchaus möglich, nur einen Sollwertgeber für alle drei Ansteuerschaltungen vorzusehen, wobei dann die Klemmen 52 bzw. 53 einer der Ansteuerschaltungen 52, 52', 52" parallel geschaltet werden.
Die Ansteuerschaltungen 50, 50', 50" sind gleich aufgebaut und erlauben eine stufenlose Regulierung der Heizleistung eines jeden Heizelementes 23, 24,25 entsprechend dem mittels des entsprechenden Sollwertgebers RP, RP', RP" eingestellten Sollwert der Temperatur. Für die Heizungsregulierung wird ein Thyristor T3, T3', T3" verwendet, doch kann auch ein Triac verwendet werden. Jeder Thyristor wird über einen stabilisierten Spannungsteiler und zwei Zener-Diöden D,, D2, die mit den Transistoren T,, T2 in Gegenschaltung gekoppelt sind, ausgesteuert. Mit den stabilisierten Spannungsteiler, der durch den Thermistor RT und dem Sollwertgeber gebildet ist, wird die Basis des Transistors ausgesteuert. Die Zener-Dioden haben den Zweck, eine Netzspannungsschwankung von +/ —10% zu kompensieren. Je nach der Einstellung des Sollwertgebers und der Höhe des Thermistorwiderstandes, der durch die Temperatur an dem entsprechenden Messpunkt (die beiden Schweisskeile 22 und der Mittelbereich) bestimmt wird, steigt oder fallt die Steuerspannung am Thyristor. Somit wird die Leistung der Heizung durch Phasenschnitt gesteuert, welcher von der Temperatur des Messpunktes abhängig ist. Die Widerstände Rb R2, R3 und R4 dienen zur Festlegung der Arbeitspunkte der Transistoren Th T2.
R
3 Blätter Zeichnungen

Claims (3)

667 422
1. Schweissgerät zum Verschweissen von Kunststoffbahnen durch mindestens zwei im Abstand angeordneter Schweissnähte, bestehend aus einem Geräterahmen, einer vor der Verschweissungs-stelle längs verschiebbar angeordneten Heizeinrichtung mit mindestens zwei im Abstand angeordneten Schweisskeilen und aus einander gegenüberliegenden und aneinander anpressbaren, durch einen Motor antreibbaren Andrückrollen, dadurch gekennzeichnet, dass in jedem Schweisskeil (22) der Heizeinrichtung (19) voneinander getrennte und unabhängig voneinander thermostatisch steuerbare Heizelemente (23, 24) angeordnet sind.
2. Schweissgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Heizelemente (23,24) in an sich bekannter Weise mittels Thyristoren (T3, T3, T3") steuerbar sind.
2
PATENTANSPRÜCHE
3. Schweissgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zwischen den keramisch ausgeführten Heizelementen (23, 24) ein weiterer Heizkörper (25) vorgesehen ist, wobei die beiden Heizelemente (23, 24) im Bereich des keilförmigen Endes über den mittleren Heizkörper (25) vorstehend ausgebildet sind.
CH4319/85A 1984-11-13 1985-10-07 Schweissgeraet zum verschweissen von kunststoffbahnen. CH667422A5 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT358384A AT381275B (de) 1984-11-13 1984-11-13 Schweissgeraet

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CH667422A5 true CH667422A5 (de) 1988-10-14

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CH4319/85A CH667422A5 (de) 1984-11-13 1985-10-07 Schweissgeraet zum verschweissen von kunststoffbahnen.

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US (1) US4769102A (de)
AT (1) AT381275B (de)
CH (1) CH667422A5 (de)
DE (1) DE3535759A1 (de)
FR (1) FR2572998B1 (de)

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Also Published As

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DE3535759C2 (de) 1988-06-16
US4769102A (en) 1988-09-06
FR2572998A1 (fr) 1986-05-16
AT381275B (de) 1986-09-25
ATA358384A (de) 1986-02-15
DE3535759A1 (de) 1986-05-15
FR2572998B1 (fr) 1990-08-03

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