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WO2001043949A1 - Dispositif destine a façonner des bandes mobiles sous forme de feuilles de plastique - Google Patents

Dispositif destine a façonner des bandes mobiles sous forme de feuilles de plastique Download PDF

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Publication number
WO2001043949A1
WO2001043949A1 PCT/EP2000/012716 EP0012716W WO0143949A1 WO 2001043949 A1 WO2001043949 A1 WO 2001043949A1 EP 0012716 W EP0012716 W EP 0012716W WO 0143949 A1 WO0143949 A1 WO 0143949A1
Authority
WO
WIPO (PCT)
Prior art keywords
energy supply
optics
plastic film
imaging optics
film webs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2000/012716
Other languages
German (de)
English (en)
Inventor
Theresa Funke
Günther NEUDERT
Dieter Irsiegler
Otto Zeininger
Christoph Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lemo Maschinenbau GmbH
Original Assignee
Lemo Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lemo Maschinenbau GmbH filed Critical Lemo Maschinenbau GmbH
Priority to EP00990750A priority Critical patent/EP1240003A1/fr
Priority to AU30117/01A priority patent/AU3011701A/en
Publication of WO2001043949A1 publication Critical patent/WO2001043949A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1648—Laser beams characterised by the way of heating the interface radiating the edges of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1632—Laser beams characterised by the way of heating the interface direct heating the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1606—Ultraviolet [UV] radiation, e.g. by ultraviolet excimer lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1619—Mid infrared radiation [MIR], e.g. by CO or CO2 lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1645—Laser beams characterised by the way of heating the interface heating both sides of the joint, e.g. by using two lasers or a split beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1687—Laser beams making use of light guides
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Definitions

  • the invention relates to a device for assembling, in particular welding, perforating and / or cutting, moving plastic film webs with a device for supplying energy for heating and for exerting mechanical pressure in the processing area
  • the bottom seams and side seams are formed by welding overlapping foils.
  • a double-layered foil web is joined together by melting and flowing together of the film material.
  • the heat required for melting can be caused by heat conduction, radiation or friction be introduced into the material
  • heatable pressure stamps are used as a tool.
  • the tool serves on the one hand to bring the heat required for melting the film material into the area to be welded
  • the tool serves to compress the films to be welded together during melting so as to Ensure sufficient strength of the weld seams.
  • the suitable pressure stamps can also be used to cut and / or perforate the film webs in the area of the weld seam
  • the film webs are pulled off a roll and discontinuously assembled with the pressure stamp described above.
  • the conventional pressure stamps must have a very high resistance in order to ensure sufficient processing quality.
  • the high resistance of the pressure stamp is achieved through use High-quality steel guaranteed
  • the use of high-quality steel means that the moving masses are relatively large. This limits the number of cycles or number of pieces that can be achieved with conventional devices and methods
  • the object of the invention is to provide a device of the type described at the outset which enables higher processing speeds and larger numbers of pieces in a simple manner and yet ensures a sufficient processing quality
  • the object is achieved in a device for assembling, in particular welding, perforating and / or cutting, moving plastic film webs with a device for supplying energy for heating and for exerting mechanical pressure in the processing area in that at least one separate energy supply device and at least one separate one Means for exerting mechanical pressure are provided, which are suitable for processing continuously moving plastic film webs.
  • the energy supply for increasing the temperature of the material to be processed is separated from the mechanical pressure generation required for welding. This enables continuous processing of the moving plastic film webs the advantage that very high processing speeds can be achieved, especially in comparison with discontinuously working assembly devices for the Machine construction and smooth running, continuous film movement is extremely advantageous
  • a special embodiment of the invention is characterized in that the energy supply device works essentially transversely to the direction of movement of the plastic film webs. It is particularly important that processing can be carried out transversely to the direction of movement despite the continuous movement of the film webs
  • Another particular embodiment of the invention is characterized in that the energy supply device operates essentially along the direction of movement of the plastic film webs.
  • the processing is transverse and along the direction of movement of the Plastic film webs allow any course of welds, perforations or cuts in the film webs.
  • processing can only take place along the direction of movement of the plastic film webs
  • a further special embodiment of the invention is characterized in that the device for exerting mechanical pressure comprises at least one essentially cylindrical body which can be rotated about its longitudinal axis. Contact with the cylindrical body makes it possible to exert mechanical pressure in a particularly simple manner on the continuously moving film web The rotatable mounting of the cylinder-shaped body ensures that the frictional forces between the film web and the cylinder-shaped body are minimal
  • the cylindrical body is formed by a roller or roller.
  • the foils to be welded are printed against one another by running over at least one roller or at least one roller in the tensioned state
  • the device for exerting mechanical pressure comprises at least a pair of rollers between which the plastic film webs are passed.
  • the rollers serve to continuously compress the films in the processing area Warm can be dissipated
  • Another special embodiment of the invention is characterized in that the energy supply device works without contact.This firstly prevents tool wear, which occurs in conventional machining devices due to contact between the tool and the semi-finished product.On the other hand, mechanical damage to the film webs is prevented by the energy supply device.
  • the best way In the continuous running of the film webs, particularly at right angles to supplying energy at certain points, there is a non-contact energy supply.
  • An electrical one is particularly suitable for contactless energy supply or electromagnetic energy supply This has the advantage that the energy required to melt the material can be introduced in the shortest possible time
  • Another particular embodiment of the invention is characterized in that the energy is supplied by electromagnetic radiation with a wavelength between 180 nanometers and 12 micrometers.
  • electromagnetic energy supply options short-wave radiation between ultraviolet and medium-infrared is most favorable because the radiation is conducted and concentrated over certain distances can mean that the energy does not have to be generated directly at the point of use
  • a further special embodiment of the invention is characterized in that the energy supply device is fed by at least one laser.
  • Lasers are best suited for guiding and shaping the beam because they emit bundled radiation which can be focused best.
  • a single laser can be fixed or switchable beam switches operate several energy supply stations
  • a further particular Ausbowungsart the invention is characterized in that the energy supply means is fed 2 laser of at least one CO A C0 2 - laser emits radiation having a wavelength of 10 6 microns
  • This radiation has two advantages First, it is absorbed by all plastics Second, it is by Glass or plexiglass can be easily shielded so that the machine does not have to be optically encapsulated
  • Another special embodiment of the invention is characterized in that the energy supply device is fed by at least one solid-state / half-laser laser system.
  • Solid-state / half-laser systems operate in the near infrared range (approximately 1 ⁇ m). Their advantage is that their radiation is guided in flexible glass fibers The mechanical arrangement of the lasers in relation to the machine is thereby facilitated
  • a further particular embodiment of the invention is characterized in that the energy supply device comprises at least one beam guiding optics in order to direct the electromagnetic radiation into the processing area.
  • Movable and / or rigid beam guiding optics can be used as beam guiding optics - be guided foil webs.
  • a further special embodiment of the invention is characterized in that the imaging optics or beam guiding optics are designed in such a way that a radiation band is generated in the processing area, which extends transversely to the direction of movement of the plastic film webs.
  • the use of such a radiation band is particularly advantageous when producing weld seams transversely to the film running direction, because it enables the entire width of the film web to be irradiated in one switch-on process.
  • a further special embodiment of the invention is characterized in that the imaging optics or beam guiding optics are designed in such a way that a light spot is generated in the processing area with which the plastic film webs can be scanned in any direction.
  • a radiation band is not sufficient for randomly arranged and running weld seams or assemblies.
  • a defined light spot that can be scanned via the film web is preferable. Tilting mirrors or rotating prisms or a combination of these are particularly suitable for scanning.
  • the machining It is important for the machining that the light spot diameters remain essentially the same despite the extended paths to be machined. This can be achieved by large distances between the imaging optics and the processing area, by tracking the imaging optics or by a special shaping of the imaging optics. With a rotating prism e.g. a special shape in a simple manner for the light spot width perpendicular to the assembly direction.
  • the imaging optics or beam guiding optics comprise two rotating prisms or tilting mirrors which are arranged opposite one another.
  • the rotating prism or prisms have several deflecting surfaces. The number of deflecting surfaces on a rotating prism, together with the rotational frequency, determines the shortest possible time intervals between successive welding tracks
  • the beam guidance can also be carried out by at least one optical system attached to a slide
  • the light spot shows strong deviations from the usual rotational symmetry, for example in the direction of assembly, is significantly longer than perpendicular to it, or vice versa
  • FIG. 1 shows an embodiment of an assembly device according to the invention in side view
  • FIG. 2 shows the assembly device from FIG. 1 in a top view
  • Figure 3 shows an embodiment of an energy supply device in a side view
  • FIG. 4 shows a further embodiment of an energy supply device in a side view
  • FIG. 5 shows a light guide device for controlling the energy supply in an assembly device according to the invention
  • Figure 6 shows an embodiment of a packaging device according to the invention for the simultaneous processing of several foils
  • FIG. 7 shows a beam expansion optics for use in an assembly device according to the invention
  • FIG. 1 schematically shows an embodiment of an assembly device according to the invention.
  • a sheet of plastic 1 is continuously drawn off from a roll (not shown) via a pair of feed rollers 2, 3.
  • the direction of removal of the sheet 1 is indicated in FIG. 1 by an arrow 4
  • Two non-contact energy supply devices 5 and 6 are arranged opposite each other on both sides of the film web 1.
  • the two energy supply devices 5 and 6 serve to heat the double-lying film web 1 made of plastic in a linear manner so that they are welded as they pass through the rollers 7, 8
  • a suitable control system ensures that the two foils match each other exactly with their heated points
  • a pair of feed rollers 7 8 are arranged.
  • Arrows 9 and 10 indicate the direction of rotation of the feed rollers 7 and 8.
  • Arrows 11 and 12 indicate that the two feed rollers 7 and 8 exert a compressive force on the film web 1 This ensures that the areas of the film web 1 heated with the aid of the energy supply devices 5 and 6 are pressed together. By pressing the heated areas together, a welded connection is established between the two films lying one above the other.
  • the two feed rollers 7 and 8 can also be designed to be cooled around the To allow heat to be removed from the area processed with the aid of the energy supply devices 5 and 6 Following the preferred pair of rollers 7, 8, two further energy supply devices 13 and 14 are arranged opposite each other on both sides of the film web 1.
  • the two energy supply devices 13 and 14 serve, for example, to carry out a further cutting operation. Depending on the number of cuts to be made, however, the cutting can also be carried out alone with the aid of one of the energy supply devices 13 and 14. Of course, if necessary, more than the energy supply devices 5 6 and 13 14 shown in FIG. 1 can be combined in one assembly device
  • an arrow 16 indicates that the energy supply devices 5 6 and 13 14 are designed to be movable along the film web 1.
  • the energy supply devices can also be moved only by optical beam deflection
  • the manufacturing method according to the invention is influenced by various parameters.
  • the amount of energy introduced into the film web 1 by the energy supply devices 5, 6 and 13, 14 depends, inter alia, on the power of the laser used, the focal length of the optics used and the dwell time of the energy points on the film web 1
  • the quality of the assembled products strongly depends on the contact pressure exerted by the feed rollers 7 and 8 on the film web 1 and the distance between the location of the energy input on the film web 1 and the feed rollers 7, 8.
  • the cooling speed of the material used and the The temperature of the rollers 7 8 and the cooling time play a not inconsiderable role for the processing quality.
  • the aforementioned parameters are related to the take-off speed of the film web 1
  • the angle ⁇ shown in FIG. 2 describes the travel path of the energy supply device 5 or 6 as a function of the film web speed 4 and the residence time of the energy points on the film web 1.
  • the energy supply devices 5 and 6 must be effective in congruent film areas so that the heated areas are pressed together come to school one another
  • the location of the energy reception on the film web 1 can be compared to the film web speed 4. can be varied equally quickly accordingly.
  • the angle ⁇ takes values that approach 90 °
  • FIG. 3 schematically shows an optical arrangement for deflecting laser beams 22 and 23 used for energy input.
  • the laser beams 22 and 23 are guided through lenses 24 and 25 for focusing.
  • the focused laser beams 22 and 23 then strike two rotating prisms 20 and 21 through the beam Rotating prisms 20 and 21 can direct the laser beams 22 and 23 to any points 26 on the film web to be processed.
  • the axes of rotation of the rotating prisms 20 and 21 run perpendicular to the welding path
  • the rotating prisms 20 and 21 in FIG. 3 have a large number of deflecting surfaces. Depending on the application, rotating prisms with only one deflecting surface can also be used. If two weld seams are to be welded at short distances, it is advantageous to use a rotating prism with two deflecting surfaces. Such a rotating prism can be used work with rotational frequencies from 10 to 50 Hz. The deflection or mirror surfaces can also be used to focus the laser beams
  • FIG. 4 shows a film web 1 which is pulled off a roll (not shown) in the direction of an arrow 30.
  • the film web 1 is processed with the aid of a laser beam 22
  • the laser beam 22 is focused at a certain distance from the rotating prism 20.
  • the focus path is indicated by a curve 31.
  • suitable optics By using suitable optics, the influence of the curved focus path on the flat processing surface can be taken into account.
  • Either optics can be used a large focal length can be used at a large distance from the film web, or a correction can be made by appropriate shaping of the reflection surface
  • FIG. 5 shows a prism 33 with cone-shaped deflection surfaces 34.
  • the cone-like surfaces 34 have narrow points in the middle.
  • the focal length is shortest in the middle. This results in a stronger focus transverse to the beam movement direction.
  • the focus points with this solution an elongated shape on that means that the beam dimensions are in focus in the welding direction are larger than perpendicular to it. This leads to an increase in the dwell time of the laser beam in the processing area
  • FIG. 6 shows that, with the aid of laser radiation 42, two different film webs 36 and 37 can also be processed with a single energy supply device.
  • the two film webs 36 and 37 are brought together by two feed rollers 38, 39 and pulled off together, as indicated by an arrow 40 is
  • FIG. 7 shows how laser radiation 47 can be shaped into a light band with the aid of expanding cylinder optics 48 transversely to the film take-off direction.
  • the expanded laser radiation can then be focused, for example, with the aid of another optic 49 on a line transverse to the film web 50

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Plasma & Fusion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Dispositif destiné à façonner, en particulier à souder, perforer et/ou couper, des bandes (1) mobiles sous forme de feuilles de plastique, qui est doté d'un appareil servant à apporter de l'énergie de chauffe et à exercer une pression mécanique dans la zone de traitement. Selon la présente invention, ledit dispositif comporte au moins un appareil séparé d'apport d'énergie (5, 6) et au moins un appareil séparé (7, 8) pour l'application d'une pression mécanique qui sont appropriés pour le traitement en continu de bandes (1) mobiles sous forme de feuille de plastique, ce qui permet une vitesse de traitement plus élevée et la production d'un plus grand nombre d'articles.
PCT/EP2000/012716 1999-12-17 2000-12-14 Dispositif destine a façonner des bandes mobiles sous forme de feuilles de plastique Ceased WO2001043949A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00990750A EP1240003A1 (fr) 1999-12-17 2000-12-14 Dispositif destine a fa onner des bandes mobiles sous forme de feuilles de plastique
AU30117/01A AU3011701A (en) 1999-12-17 2000-12-14 Device for fabricating moving widths of plastic film

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19961361.3 1999-12-17
DE19961361A DE19961361A1 (de) 1999-12-17 1999-12-17 Vorrichtung zum Konfektionieren von bewegten Kunststofffolienbahnen

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WO2001043949A1 true WO2001043949A1 (fr) 2001-06-21

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003045668A1 (fr) * 2001-11-27 2003-06-05 C. F. Ploucquet Gmbh & Co. Procede et dispositif pour connecter des couches de materiau de maniere etanche aux liquides et bande d'etancheite concue a cette fin
EP1366890A1 (fr) * 2002-05-16 2003-12-03 Leister Process Technologies Procédé et appareil pour joindre des matières synthétiques par soudage à haute vitesse
WO2010049493A1 (fr) * 2008-10-31 2010-05-06 Getinge La Calhene Procede et dispositif de fabrication de sac
EP2047969A3 (fr) * 2007-10-09 2010-09-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé et dispositif de soudure d'au moins deux couches d'un matériau polymère par rayonnement laser
US8814430B2 (en) 2010-02-23 2014-08-26 Kraft Foods R&D, Inc. Food package having opening feature

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
DE102008023963A1 (de) * 2008-05-16 2009-12-10 Tyco Electronics Raychem Gmbh Laserstrahl absorbierende Stützwendel sowie Verfahren und Vorrichtung zur Herstellung derselben
EP2289660B1 (fr) * 2009-08-27 2015-03-18 Vektor Pharma TF GmbH Dispositif et procédé de découpe pour des matériels TDS ou ODF avec deux paires de rouleaux d'entraînement

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EP0483569A1 (fr) * 1990-10-29 1992-05-06 Fmc Corporation Appareil pour souder des matières plastiques
JPH04255326A (ja) * 1991-02-06 1992-09-10 Mitsubishi Plastics Ind Ltd 背貼りシール方法
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EP0773164A1 (fr) * 1995-11-07 1997-05-14 AZIONARIA COSTRUZIONI MACCHINE AUTOMATICHE-A.C.M.A.-S.p.A. Procédé et équipement pour le scellement d'une feuille de matériau d'emballage
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003045668A1 (fr) * 2001-11-27 2003-06-05 C. F. Ploucquet Gmbh & Co. Procede et dispositif pour connecter des couches de materiau de maniere etanche aux liquides et bande d'etancheite concue a cette fin
EP1366890A1 (fr) * 2002-05-16 2003-12-03 Leister Process Technologies Procédé et appareil pour joindre des matières synthétiques par soudage à haute vitesse
EP2047969A3 (fr) * 2007-10-09 2010-09-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé et dispositif de soudure d'au moins deux couches d'un matériau polymère par rayonnement laser
WO2010049493A1 (fr) * 2008-10-31 2010-05-06 Getinge La Calhene Procede et dispositif de fabrication de sac
FR2937898A1 (fr) * 2008-10-31 2010-05-07 Getinge La Calhene Procede et dispositif de fabrication de sac.
US8814430B2 (en) 2010-02-23 2014-08-26 Kraft Foods R&D, Inc. Food package having opening feature

Also Published As

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DE19961361A1 (de) 2001-07-12
AU3011701A (en) 2001-06-25

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