WO2006045595A1 - A transport device for an ultrasonic cutting machine, an ultrasonic cutting machine, and a method for cutting sheet formations - Google Patents

A transport device for an ultrasonic cutting machine, an ultrasonic cutting machine, and a method for cutting sheet formations Download PDF

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Publication number
WO2006045595A1
WO2006045595A1 PCT/EP2005/011445 EP2005011445W WO2006045595A1 WO 2006045595 A1 WO2006045595 A1 WO 2006045595A1 EP 2005011445 W EP2005011445 W EP 2005011445W WO 2006045595 A1 WO2006045595 A1 WO 2006045595A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutter
wheel
sonotrode
transport
cutter wheel
Prior art date
Application number
PCT/EP2005/011445
Other languages
French (fr)
Inventor
Dietmar Heil
Original Assignee
Jentschmann Ag Zürich
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 Jentschmann Ag Zürich filed Critical Jentschmann Ag Zürich
Publication of WO2006045595A1 publication Critical patent/WO2006045595A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/22—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with a movable member, e.g. a roller
    • B26D1/225—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with a movable member, e.g. a roller for thin material, e.g. for sheets, strips or the like
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/087—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using both a rotary sonotrode and a rotary anvil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • 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
    • B29C66/8167—Quick change joining tools or surfaces
    • 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
    • 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
    • B29C66/845—C-clamp type or sewing machine type
    • 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
    • B29C66/967—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes
    • B29C66/9672—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes involving special data inputs, e.g. involving barcodes, RFID tags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/20—Cutting beds
    • B26D2007/202—Rollers or cylinders being pivoted during operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/20—Cutting beds
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a roller
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7443—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc by means of ultrasonic vibrations
    • 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
    • B29C66/006—Preventing damaging, e.g. of the parts to be joined
    • B29C66/0062—Preventing damaging, e.g. of the parts to be joined of the joining tool, e.g. avoiding wear 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • 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
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • 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
    • B29C66/924—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 controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—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 controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • 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
    • 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
    • B29C66/93411—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the parts to be joined having different speeds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2313/00—Use of textile products or fabrics as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products

Definitions

  • the subject-matter of the invention is a transport device for an ultrasonic cutting machine, a method for cutting textile and non-textile sheet formations having, for example, a pile-like front side as well as subjects manufactured according to this method and an ultrasonic cutting machine.
  • acoustic energy for machining or treating materials is known from various applications.
  • the energy of ultrasound oscillations may be used in order to connect thermoplastic or polymer-containing materials to one another (welding) or to separate them (cutting).
  • a continuously operable ultrasonic cutting machine is known from WO97/03241.
  • the possibility of alternatively setting the anvil into ultrasonic oscillation and of leading the textile web between the cutting knife and the excited anvil is also pointed out.
  • the cutting knife has a blunt cutting edge. The cut edges may be welded simultaneously on cutting of the textile web.
  • One object of the present invention is to provide a transport device for continuously operable ultrasonic cutting machines and. a method for cutting textile and non-textile sheet formations, which encourages the manufacture of uniform cut edges on the sheet formations and/or simplifies the guiding of the sheet formations during the cutting procedure.
  • Another object of the present invention is to provide a method and an ultrasonic cutting machine with which sheet formations with a pile-like side may be cut with a uniform quality, and which prevents the fraying of the pile at the cut edges.
  • the above-mentioned first object is achieved by a transport device for an ultrasonic cutting machine and a method for cutting textile and non-textile sheet formations as well as subjects manufactured according to this method, according to the preamble of the patent claims 1, 13 and 15.
  • the dependent claims define preferred and advantageous embodiments of the invention.
  • the ultrasonic cutting machine comprises a drivable roller sonotrode and an axially parallel cutter wheel arranged opposite the roller sonotrode.
  • the sheet formations to be separated are led through in a manual manner between the peripheral surface of the roller sonotrode and the cutter of the cutter wheel.
  • a force is exerted on the cutter wheel so that the sheet formation is pressed together between the cutter and the sonotrode.
  • the sheet formation is separated by way of the pressure of the cutter and the supply of mechanical energy in the form of ultrasonic oscillation.
  • the cutter wheel may either be driven passively or indirectly by way of the advance of the sheet formation and/or preferably actively by way of a motor.
  • the peripheral speed of the cutter wheel may be selected differently depending on the sheet formation to be processed, but has a similar magnitude to the peripheral speed of the roller sonotrode.
  • a drivable transport or guide wheels are provided on one side or both sides of the cutter wheel.
  • the transport wheel is preferably arranged coaxially to the cutter wheel and is connected to this in a rotationally fixed manner. Alternatively the axis of the transport wheel may also be offset in a parallel manner to that of the cutter wheel.
  • the transport wheel is mounted in an elastic manner and/or comprises an elastic peripheral surface.
  • the transport wheel is arranged such that it may cooperate in a roller-like manner with the roller sonotrode and/or a ball bearing arranged coaxially or axially parallel to the sonotrode wheel, or with a support wheel which may be set into rotational movement synchronously with the drivable roller sonotrode, but which does not oscillate.
  • the cutter wheel and the transport wheel e.g. by way of a settable pneumatic force, may be pressed against the sheet formation and set into rotational movement.
  • the sheet formation on the one hand is clamped between the cutter wheel and the transport wheel and on the other hand between the roller sonotrode and/or the ball bearing or the support wheel.
  • the sheet formation is advanced in a guided manner in the region of the cutter by way of the rotational movement of the transport wheel in combination with the rolling resistance or the adhesive friction on the sheet formation.
  • the sheet formation in the region of the cutter wheel is softened and severed by the oscillation energy of the sonotrode. Undesirable shearing forces are minimal on account of the rotational movement of the anvil wheel or cutter wheel.
  • the transport wheels may fullfill different tasks depending on the design. If the spring element e.g. is designed in the form of an 0-ring on the peripheral surface of the transport wheel then it ensures an adequate adhesive friction on the sheet formation in order to advance this. Such transport wheels as a rule are arranged outside the influence region of the roller sonotrode. Otherwise they serve as damping elements. Transport wheels with an elastically mounted metal ring on the other hand as a rule are applied in the region of influence of the roller sonotrode. Such transport wheels act as damped anvil wheels or counter-press wheels for the sonotrode. The sheet formations may be advanced with such anvil wheels and additionally be pressed, structured, shaped, sealed or welded in the region of the cut edges depending on the respective damping behaviour.
  • the spring element e.g. is designed in the form of an 0-ring on the peripheral surface of the transport wheel then it ensures an adequate adhesive friction on the sheet formation in order to advance this.
  • Such transport wheels as a rule are arranged outside the influence region of the roller sonotrode. Otherwise they serve
  • Transport wheels of different diameters may be used depending on properties such as thickness and material of the sheet formation to be cut.
  • the diameter of the transport wheel may be larger, equal or smaller than the outer diameter of the cutter of the cutter wheel.
  • the transport wheel In the unloaded condition the transport wheel may project beyond the cutter wheel or alternatively the cutter wheel heyond the transport wheel, in the direction towards the sonotrode.
  • the pressing pressure and the effect of the transport wheel may be optimally adapted to the different properties of the sheet formations to be cut.
  • properties are for example the number of different layers, or plies, their chemical composition, their surface sliding properties etc.
  • the ultrasonic cutting machine comprises a drivable roller sonotrode which projects from below through a gap in an operating table, and an axially parallel cutter wheel arranged above the sonotrode.
  • a small cutter with a rectangular or slightly trapezoidal cross section is formed on the periphery of the cutter wheel. This projects beyond the base body of the cutter wheel by more than the thickness of the sheet formation to be cut.
  • the sheet formations to be separated are led through between the peripheral surface of the roller sonotrode and the cutter of the cutter wheel. A force is exerted on the cutter wheel so that the sheet formation is clamped between the cutter and the sonotrode.
  • the cutter wheel may either be driven passively or indirectly by way of the advance of the sheet formation and/or preferably actively by way of a motor.
  • the peripheral speed of the cutter wheel may be selected differently depending on the sheet formation to be processed, but has a similar magnitude to the peripheral speed of the roller sonotrode.
  • drivable transport or guide wheels are provided on one side or both sides of the cutter wheel.
  • the transport wheels are preferably arranged coaxially to the cutter wheel and are connected to these in a rotationally fixed manner.
  • the axes of the transport wheels may also be offset in a parallel manner to that of the cutter wheel.
  • the transport wheels may be mounted in an elastic manner and/or may have an elastic peripheral surface.
  • Each transport wheel is arranged such that it may cooperate in a roller-like manner with the roller sonotrode and/or a ball bearing arranged coaxially or axially parallel to the sonotrode wheel, or with a support wheel which may be set into rotational movement synchronously with the drivable roller sonotrode, but which does not oscillate.
  • the cutter wheel and the transport wheel e.g. by way of a settable pneumatic force may be pressed against the sheet formation and set into rotational movement.
  • the sheet formation on the one hand is clamped between the cutter wheel and the transport wheel, and on the other hand between the roller sonotrode and/or the ball bearing or the support wheel.
  • the sheet formation is advanced in a guided manner in the region of the cutter by way of the rotational movement of the transport wheel in combination with the rolling resistance or the adhesive friction on the sheet formation.
  • the sheet formation in the region of the cutter wheel is softened and severed by the oscillation energy of the sonotrode.
  • Undesirable shearing forces in the region of the softened cut edges of the sheet formation and a distortion of the sheet formation caused by such forces are ⁇ iinimal on account of the rotational movement of the anvil wheel or cutter wheel.
  • the pile-like front side of the sheet formation lies on the roller sonotrode which is wide compared to the cutter.
  • the pile is pressed together onto the rear side of the sheet formation by way of the pressing force of the cutter wheel.
  • the pressing pressure acting on the pile is at its greatest directly at the cutter and reduces towards the edge of the roller sonotrode on both sides.
  • the cutter serves as an anvil if energy is supplied to the sheet formation from the sonotrode excited into ultrasonic oscillation.
  • the sheet formation is greatly softened or melted between the cutter and the sonotrode.
  • the cutter penetrates the back of the sheet formation and the pressed-together pile.
  • the supply of energy directly next to the cutter is high enough for the pile to be melted or sealed along the cut edges.
  • the fraying of the pile is prevented by way of this.
  • the rotational movement of the cutter wheel during the cutting favours the formation of clean, uniform cut edges and prevents pile parts from clinging to the cutter.
  • Figure 1 a schematic representation of an ultrasonic cutting device of a first embodiment
  • Figure 2 a schematic representation of an arrangement with a roller sonotrode and a cutter wheel, in a lateral view
  • Figure 3 a cross section of an arrangement with a roller sonotrode and a cutter wheel, in a front elevation
  • Figure 4 a cross section of a part of a cutter wheel with a transport wheel held thereon, in a first design
  • Figure 5 a cross section of a part of a cutter wheel with a transport wheel held therein, in a further design
  • Figure 6 a schematic representation of an ultrasonic cutting device of a second embodiment
  • Figure 7 a schematic representation of an arrangement with a roller sonotrode and a cutter wheel, in a lateral view
  • Figure 8 a cross section of an arrangement with a roller sonotrode and a cutter wheel
  • Figure 9 a cross section of a further arrangement with a roller sonotrode, cutter wheel and two transport wheels arranged laterally of the cutter wheel.
  • FIG 1 shows an ultrasonic cutting machine 1 with an operating table 3 and with an upper arm 7 which is held on a stand 5.
  • a head part 9 is mounted in a displaceable or adjustable manner in the vertical direction. This is illustrated in Figure 1 by the direction arrows Pl, P2.
  • a motor-driven anvil wheel or cutter wheel 11 which is rotatable about a first rotation axis Al, with a peripheral cutter 12 projects beyond the lower end of the head part 9.
  • the cutter 12 may have a rectangular or trapezoidal cross section.
  • a gap opening 13 is recessed in the operating table 3 below the cutter wheel 11.
  • a motor-driven, wheel-like sonotrode or rotor sonotrode or roller sonotrode 15 is rotatably mounted below the operating surface of the table 3 about a further rotation axis A3.
  • the sonotrode 15 may be excited into ultrasound oscillation by way of a high- frequency generator 17 which is controlled by a control 19.
  • the control 10 controls the drive or drives for the roller sonotrode 15 and the cutter wheel 11 in a manner such that these wheels 11, 15 move with an opposite rotational direction as this is represented in Figure 1 by way of the direction arrows P3, P4.
  • the head part 9 is lowered; wherein the distance s ( Figure 2) between the cutter 12 of the cutter wheel 11 and the peripheral surface of the roller sonotrode 15 reduces. If the cutter wheel 11 lies on the sheet formation 21, the head part 9 continues to be impinged e.g.
  • the sheet formation 21 is softened or melted in the region of the cutter 12 or of the cutter wheel 11 by way of supplying ultrasound energy to the roller sonotrode 15.
  • the contact pressure of the cutter 12 is high in comparison to the region of the cutter wheel periphery which borders the cutter. For this reason the sheet formation 21 is separated between the cutter 12 and the roller sonotrode 15.
  • ultrasound energy is additionally transferred to the sheet formation 21 also between the region or regions of the cutter wheel periphery, said region or regions bordering the cutter 12, and the roller sonotrode 15.
  • the cutter wheel 11 has a cutter wheel width m of for example 7mm, the cutter 12 a cutter width k for example of 1.5 mm ( Figure 3).
  • the cutter wheel 11 and the cutter 12 may also have larger or smaller widths.
  • the cutter 12 - as is represented in Figure 3 - may be designed symmetrically or centrally on the cutter wheel 11. Preferably however - as is shown schematically in Figure 3 - it is arranged displaced slightly out- of-centre in the axial direction towards the cutter wheel edge.
  • the cutter wheel 11 may thus be mounted on the head part 9 in two different ways.
  • the cutter 12 is offset out-of-centre in the direction of the cutter wheel axis Al to the left side and in the other case to the right side.
  • the cutter wheel 11 With an excessive wearing or a formation of grooves on the peripheral surface of the roller sonotrode 15 by the contact with the cutter 12, the cutter wheel 11 may be disassembled and reversely may be assembled again.
  • the contact location between the cutter 12 and the sonotrode wheel 15 is altered, and the sonotrode wheel 15 may be used for longer before it needs to be replaced.
  • the cutter 12 projects beyond the adjacent region of the cutter wheel 11 by the height h.
  • the diameter Dl (Fig. 2) of the cutter wheel 11 in the region of the cutter 12 is for example approx. 80mm. Small cutter diameters Dl are basically required in order to be able to cut tight radii on the sheet formations 21.
  • the cutter diameters Dl should however be larger than about 20mm since cutters 12 with smaller diameters Dl are excessively heated and worn. Moreover with the cutters 12 with smaller diameters Dl one must, reckon with loud whistling noises during , the welding. It has been shown that the cutter. wheels 11 with a cutter diameter Dl in the region of about 25 mm to about 100mm, in particular those with . a diameter. Dl of about 80mm are particularly suitable.
  • a transport wheel 23 is rotatably mounted about a second axis A2 on one or both sides of the cutter wheel 11.
  • the second axis A2 may be arranged axially parallel to the first rotational axis
  • Al of the cutter wheel 11 may be identical to this first rotation axis Al.
  • the transport wheels 23 may be held on the cutter wheel 11 in a rigid or elastically resilient manner.
  • the transport wheel or wheels 23 may be driven by the same motor (not shown) as the cutter wheel 11.
  • the transport wheels 23 may also be driven by independent motors.
  • the width n of the transport wheels 23 is dimensioned such that the transport wheel 23 may cooperate with the roller sonotrode 15 in a roller-like manner. If the width b of the roller sonotrode 15 is too narrow for this purpose then one may provide support rollers (not shown) which are actively or passively drivable coaxially or generally axially parallel to the roller sonotrode 15 on one side or both sides of the roller sonotrode 15, and which alternatively or additionally to the roller sonotrode 15 serve as rotatable counter press rollers for the transport wheels 23.
  • the transport wheel 23 is connected to the cutter wheel 11 in a rotationally fixed manner by way of a positive-fit or a non-positive fit connection (not shown), for example by way of screws or by way of an adhesive.
  • the transport wheel 23 and the cutter wheel 11 may also be formed as one piece.
  • a peripheral notch or groove 25 is formed along the periphery of the transport wheel 23.
  • An elastic spring element 27 in the form of an O-ring of e.g. rubber, nitrile or silicone is preferably applied or fixed in the groove 25 in a slightly tensioned manner.
  • the transport wheel 23 may be designed such that the outer diameter of the O-ring is smaller, equal or larger than the diameter of the cutter wheel periphery 10.
  • a shaft receiver 29 for fastening a motor-driven shaft (not represented) is recessed centrally at the cutter wheel 11 and at the transport wheel 23.
  • the transport wheel 23 has the shape of a flange with a tubularly projecting shaft receiver 29.
  • the transport wheel 23 is designed as a metal ring and has a peripheral surface which is structured, e.g. by way of channels. Its inner diameter D5 is somewhat larger than the outer diameter D4 of the shaft receiver 29.
  • the transport wheel .23 with one of the side surfaces lies on the facing side surface of the cutter wheel 11 and is arranged coaxially or symmetrically to the rotation axis Al of the cutter wheel 11. Even if the side surfaces of the cutter wheel 11 and of the transport wheel 23 bear on one another, no high-energy oscillation may be transmitted from the cutter wheel 11 to the transport wheel 23 due to the separation of the two wheels 11 , 23.
  • the gap between the shaft receiver 29 and the inner edge of the transport wheel 23 may e.g. be about 2.5mm to about 10mm wide.
  • the elastic spring element 27 is pressed or admitted into this gap, for example as a pressed-in rubber or silicone ring, which ensures a non-positive or friction fit connection between the shaft receiver 29 and the transport wheel 11.
  • the spring element is a silicone-containing cast mass which is filled into the gap, is gelled or cured. With a gap width of about 5mm it is ensured that on the one hand the damping behaviour of the silicone mass is sufficiently good for preventing or reducing the transmission of high-energy radial oscillation between the cutter wheel 11 and the guide wheel or transport wheel 23, and that on the other hand the transport wheel 23 is elastically mounted with an adequate stability.
  • the roller sonotrode 15 and any support wheels on the one hand rotate, and the cutter wheel 11 and the transport wheel or wheels 23 rotate in the opposite rotational direction.
  • the sheet formation 21 is pulled forward or advanced in a guided manner in the cutting direction T (Fig. 1) between the transport wheel or wheels 23 and the roller sonotrode 15 or any support wheels.
  • the advance speed may be equal or a little larger or a little smaller than the peripheral speed of the cutter 12.
  • the sheet formation 21 between the cutter 12 and the oscillating roller sonotrode 15 is softened or melted (with thermoplastic materials) and separated.
  • the cut width corresponds essentially to the cutter width k.
  • the freshly formed cut edges may be uniformly structured, embossed or sealed laterally of the cutter 12 between the roller sonotrode 15 and the peripheral surface 31 of the cutter wheel 11 and/or the peripheral surface of the transport wheel 23, depending on the design of the cutter wheel. Fluctuations in quality as may arise with conventional ultrasound cutting due to the manual advance are minimal on account of the controlled advance of the sheet formation 21. For this reason even higher cutting speeds are possible with the method according to the invention.
  • roller sonotrode 15 may also be admitted at the top on the head part 9, and the cutter wheel in the operating table 3.
  • a foot regulator 33 ( Figure 1) may be provided for influencing the advance speed. .
  • FIG. 6 shows an ultrasonic cutting machine 1 with an operating table 3 and with an upper arm 7 which is held on a stand 5.
  • a head part 9 is mounted in a displaceable or adjustable manner in the vertical direction. This is illustrated in Figure 6 by the direction arrows Pl, P2.
  • a motor-driven anvil wheel or cutter wheel 11 which is rotatable about a first rotation axis Al, with a peripheral cutter 12 projects beyond the lower end of the head part 9.
  • a gap opening 13 is recessed in the operating table 3 below the cutter wheel 11.
  • a motor-driven, wheel-like sonotrode or rotor sonotrode or roller sonotrode 15 is rotatably mounted below the operating surface of the table 3 about a further rotation axis A3.
  • the sonotrode 15 may be excited into ultrasound oscillation by way of a high-frequency generator 17 which is controlled by a control 19.
  • the control 10 controls the drive or drives for the roller sonotrode 15 and the cutter wheel 11 in a manner such that these wheels 11, 15 move with an opposite rotational direction, as this is represented in Figure 6 by way of the direction arrows P3, P4.
  • the head part 9 is lowered, wherein the distance s ( Figure 7) between the cutter 12 of the cutter wheel 11 and the peripheral surface of the roller sonotrode 15 reduces.
  • the head part 9 continues to be impinged e.g. pneumatically with pressure, so that the sheet formation 21 is firmly clamped between the sonotrode 15 and the cutter wheel 11.
  • the sheet formation 21 is softened or melted in the region of the cutter 12 or of the cutter wheel 11 by way of supplying ultrasound energy to the roller sonotrode 15.
  • the cutter 12 comprises a preferably rectangular cross section or trapezoidal cross section which tapers with a small inclination angle towards the periphery.
  • the effective cutter width k at the periphery of the cutter 12 preferably lies in the region of about 0.5mm to about 2mm. It is significantly smaller than the cutter wheel width m (Fig. 8 and 9).
  • the cutter height h by which the cutter 12 radially projects beyond the cutter wheel periphery 10 or the cylindrical base body 8 is large compared to the cutter, width k, for example 15 mm.
  • the cutter height h is preferably dimensioned such that it is significantly larger than the thickness d of the sheet formation 21 to be cut.
  • the effective sonotrode width b on the periphery of the sonotrode 15 is larger than the cutter width k. As in Figure 8, it may be smaller or equal to, or as in Figure 9, larger than the cutter wheel width k.
  • the cutter 12 - as is schematically represented in Figure 9 — may be designed symmetrically or centrally on the cutter wheel 11. Preferably however - as is shown schematically in Figure 8 - it is arranged displaced out-of centre in the axial direction towards the cutter wheel edge.
  • the cutter wheel 11 may thus be mounted on the head part 9 in two different ways, so that the cutter 12 is offset out of centre in one case in the direction of the cutter wheel axis Al to the left side and in the other case to the right side.
  • the cutter wheel 11 may be disassembled and reversely may be assembled again.
  • the contact location between the cutter 12 and the sonotrode wheel 15 is altered, and the sonotrode wheel 15 may be used for longer before it needs to be replaced.
  • the diameter Dl (Fig. 7) of the cutter wheel 11 in the region of the cutter 12 is for example approx. 80mm.
  • Small cutter diameters Dl are basically required in order to be able to cut tight radii on the sheet formations 21.
  • the cutter diameters Dl should however be larger than about 20 mm since cutters 12 with a smaller diameter Dl are excessively heated and worn.
  • the cutters 12 with smaller diameters Dl one must reckon with loud whistling noises during the welding. It has been shown that the cutter wheels 11 with a cutter diameter Dl in the region of about 25 mm to about 100mm, in particular those with a diameter Dl of about 80mm are particularly suitable.
  • one may provide transport wheels 23 which are rotatably mounted about a second axis A2 on one or both sides of the cutter wheel 11.
  • the second axis A2 may be arranged axially parallel to the first rotational axis Al of the cutter wheel 11 or - as shown in Figure 4 - may be identical to this first rotation axis Al.
  • the transport wheels 23 may be held on the cutter wheel 11 in a rigid or elastically resilient manner.
  • the transport wheel or wheels 23 may be driven by the same motor (not shown) as the cutter wheel 11.
  • the transport wheels 23 may also be driven by independent motors.
  • the width n of the transport wheels 23 is dimensioned such that the transport wheels 23 may cooperate with the roller sonotrode 15 in a roller-like manner. If the width b of the roller sonotrode 15 is too narrow for this purpose then one may provide support rollers or wheels or ball bearings (not shown) which are actively or passively drivable coaxially or generally axially parallel to the roller sonotrode on one side or both sides of the roller sonotrode 15, and which alternatively or additionally to the roller sonotrode 15 serve as rotatable counter press rollers for the transport wheels 23.
  • two transport wheels 23 are connected to the cutter wheel 11 in a rotationally fixed manner by way of a positive-fit or a non-positive fit connection (not shown), for example by way of screws or by way of an adhesive.
  • the transport wheels 23 and the cutter wheels 11 may also be formed as one piece.
  • one peripheral notch or groove 25 is formed along the periphery of the transport wheels 23.
  • An elastic spring element 27 in the form of an O-ring of e.g. rubber, nitrile or silicone is preferably applied into the groove 25 in a slightly tensioned manner. . ..
  • the thickness or the sliding friction of the sheet formation 21 to be separated is matched to the sheet formation 21 such that the O-rings are pressed with a slight pressing force against the back 22 or the rear side of the sheet formation 21 which faces the cutter 12 during the cutting.
  • the O-rings project beyond the cutter wheel periphery 10, but the cutter 12 projects beyond these O-rings.
  • the spring elements 27 or the O-rings, which are formed on the transport wheels 23 are designed such that any energy transfer to the sheet formation 21 between the sonotrode 15 and the spring elements 27 is negligibly small.
  • a shaft receiver 29 for fastening to a motor-driven shaft (not shown) is provided centrally in the cutter wheel 11 and in the transport wheel 23.
  • the transport wheels 23 are driven, and rotate synchronously with the cutter wheel 11 and the roller sonotrode 15 about the axis Al or A2.
  • the rotational speed or the peripheral speed of the cutter wheel 23 may also be larger or smaller than the rotational speed or peripheral speed of the transport wheels 23.
  • the peripheral speeds of the roller sonotrode 15 and of the cutter 12 may be just as easily selected differently. The quality of the cut edges may be influenced by way of this.
  • roller sonotrode 15 and any support wheels on the one hand rotate in one direction
  • the cutter wheel 11 and the transport wheel or wheels 23 on the other hand rotate in the opposite rotational direction (Fig. 6).
  • the advance force may also act in an supporting manner for the manual advance of the sheet formation 21.
  • the guiding of the sheet formation 21 as a rule is effected manually.
  • active or passive guide means which influence, control or regulate the alignment or the position of the sheet formation 21 during the cutting, or the cutting direction.
  • the sheet formation 21 between the cutter 12 and the oscillating roller sonotrode 15 is softened or melted (with thermoplastic-containing materials) and separated.
  • the cut width corresponds essentially to the cutter width k.
  • sheet, formations 21 with a pile-like front side 24 such as e.g. a tuft-carpet is cut with the pile side 24 facing the sonotrode 15.
  • the pile is pressed together in the region of the sonotrode 15 which projects beyond the surface of the operating table 3.
  • the pressing pressure is at its largest directly between the cutter 12 and the sonotrode 15 and reduces towards the lateral edges of the sonotrode 15.

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Abstract

The transport device for an ultrasonic cutting machine (1) having a roller sonotrode (15) and a rotable cutter wheel (1) comprises at least one drivable transport wheel (23) arranged next to the rotatable cutter wheel (11). The transport wheel comprises an elastic spring element (27) in the shape of a peripherally arranged O-ring or a silicone ring formed close to the axis. The transport wheel (23) cooperates with the roller sonotrode (15) or with a support wheel in a roller-like manner. It permits a controlled advance of the sheet formation (21) during the cutting. The cut edges on the sheet formations (21) may be sealed in an uniform manner.

Description

A TRANSPORT DEVICE FOR AN ULTRASONIC CUTTING MACHINE.
AN ULTRASONIC CUTTING MACHINE, AND A METHOD FOR
CUTTING SHEET FORMATIONS
The subject-matter of the invention is a transport device for an ultrasonic cutting machine, a method for cutting textile and non-textile sheet formations having, for example, a pile-like front side as well as subjects manufactured according to this method and an ultrasonic cutting machine.
The use of acoustic energy for machining or treating materials is known from various applications. In particular the energy of ultrasound oscillations may be used in order to connect thermoplastic or polymer-containing materials to one another (welding) or to separate them (cutting).
A continuously operable ultrasonic cutting machine is known from WO97/03241. A textile web capable of melting, between a cutting knife which may be excited into high-frequency oscillation via an ultrasonic oscillator, and an anvil in the form of a rotatable anvil wheel, is cut amid the effect of the oscillation energy. The possibility of alternatively setting the anvil into ultrasonic oscillation and of leading the textile web between the cutting knife and the excited anvil is also pointed out. The cutting knife has a blunt cutting edge. The cut edges may be welded simultaneously on cutting of the textile web. With such ultrasonic cutting devices, in particular on cutting thicker or multi-layered textiles and/or with long-pile textiles such as tuft carpets or velour carpets there exists the danger that the textiles may snag on the cutting knife when leading them through between the essentially fixed stationary cutting knife and the anvil. Furthermore, between the softened or melted-on cut edges of the sheet formation and the cutting knife, friction forces and tensile or compressive forces, which e.g. are caused by the manually guided material movement lead to the fact that the cut edges are formed in an irregular manner and are of a fluctuating quality. The manual advance and the simultaneous guiding of the sheet formation are often difficult to accomplish, in particular with larger sheet formations.
One object of the present invention is to provide a transport device for continuously operable ultrasonic cutting machines and. a method for cutting textile and non-textile sheet formations, which encourages the manufacture of uniform cut edges on the sheet formations and/or simplifies the guiding of the sheet formations during the cutting procedure.
Another object of the present invention is to provide a method and an ultrasonic cutting machine with which sheet formations with a pile-like side may be cut with a uniform quality, and which prevents the fraying of the pile at the cut edges. The above-mentioned first object is achieved by a transport device for an ultrasonic cutting machine and a method for cutting textile and non-textile sheet formations as well as subjects manufactured according to this method, according to the preamble of the patent claims 1, 13 and 15. The dependent claims define preferred and advantageous embodiments of the invention.
The ultrasonic cutting machine comprises a drivable roller sonotrode and an axially parallel cutter wheel arranged opposite the roller sonotrode. The sheet formations to be separated are led through in a manual manner between the peripheral surface of the roller sonotrode and the cutter of the cutter wheel. A force is exerted on the cutter wheel so that the sheet formation is pressed together between the cutter and the sonotrode. The sheet formation is separated by way of the pressure of the cutter and the supply of mechanical energy in the form of ultrasonic oscillation. The cutter wheel may either be driven passively or indirectly by way of the advance of the sheet formation and/or preferably actively by way of a motor. The peripheral speed of the cutter wheel may be selected differently depending on the sheet formation to be processed, but has a similar magnitude to the peripheral speed of the roller sonotrode.
A drivable transport or guide wheels are provided on one side or both sides of the cutter wheel. The transport wheel is preferably arranged coaxially to the cutter wheel and is connected to this in a rotationally fixed manner. Alternatively the axis of the transport wheel may also be offset in a parallel manner to that of the cutter wheel. The transport wheel is mounted in an elastic manner and/or comprises an elastic peripheral surface. The transport wheel is arranged such that it may cooperate in a roller-like manner with the roller sonotrode and/or a ball bearing arranged coaxially or axially parallel to the sonotrode wheel, or with a support wheel which may be set into rotational movement synchronously with the drivable roller sonotrode, but which does not oscillate.
During the cutting, the cutter wheel and the transport wheel e.g. by way of a settable pneumatic force, may be pressed against the sheet formation and set into rotational movement. The sheet formation on the one hand is clamped between the cutter wheel and the transport wheel and on the other hand between the roller sonotrode and/or the ball bearing or the support wheel. The sheet formation is advanced in a guided manner in the region of the cutter by way of the rotational movement of the transport wheel in combination with the rolling resistance or the adhesive friction on the sheet formation. The sheet formation in the region of the cutter wheel is softened and severed by the oscillation energy of the sonotrode. Undesirable shearing forces are minimal on account of the rotational movement of the anvil wheel or cutter wheel. The transport wheels may fullfill different tasks depending on the design. If the spring element e.g. is designed in the form of an 0-ring on the peripheral surface of the transport wheel then it ensures an adequate adhesive friction on the sheet formation in order to advance this. Such transport wheels as a rule are arranged outside the influence region of the roller sonotrode. Otherwise they serve as damping elements. Transport wheels with an elastically mounted metal ring on the other hand as a rule are applied in the region of influence of the roller sonotrode. Such transport wheels act as damped anvil wheels or counter-press wheels for the sonotrode. The sheet formations may be advanced with such anvil wheels and additionally be pressed, structured, shaped, sealed or welded in the region of the cut edges depending on the respective damping behaviour.
Transport wheels of different diameters may be used depending on properties such as thickness and material of the sheet formation to be cut. The diameter of the transport wheel may be larger, equal or smaller than the outer diameter of the cutter of the cutter wheel. In the unloaded condition the transport wheel may project beyond the cutter wheel or alternatively the cutter wheel heyond the transport wheel, in the direction towards the sonotrode. By way of this, the pressing pressure and the effect of the transport wheel may be optimally adapted to the different properties of the sheet formations to be cut. Such properties are for example the number of different layers, or plies, their chemical composition, their surface sliding properties etc.
The above-mentioned second object is achieved by a method and an ultrasonic welding machine for cutting sheet formations as well as subjects manufactured according to the method, according to the claims 16, 20 and 25. The dependent claims define preferred and advantageous embodiments of the invention.
The ultrasonic cutting machine comprises a drivable roller sonotrode which projects from below through a gap in an operating table, and an axially parallel cutter wheel arranged above the sonotrode. A small cutter with a rectangular or slightly trapezoidal cross section is formed on the periphery of the cutter wheel. This projects beyond the base body of the cutter wheel by more than the thickness of the sheet formation to be cut. The sheet formations to be separated are led through between the peripheral surface of the roller sonotrode and the cutter of the cutter wheel. A force is exerted on the cutter wheel so that the sheet formation is clamped between the cutter and the sonotrode. One may separate the sheet formation by way of the pressure of the cutter and the supply of mechanical energy in the form of ultrasonic oscillation. The cutter wheel may either be driven passively or indirectly by way of the advance of the sheet formation and/or preferably actively by way of a motor. The peripheral speed of the cutter wheel may be selected differently depending on the sheet formation to be processed, but has a similar magnitude to the peripheral speed of the roller sonotrode.
Preferably drivable transport or guide wheels are provided on one side or both sides of the cutter wheel. The transport wheels are preferably arranged coaxially to the cutter wheel and are connected to these in a rotationally fixed manner. Alternatively, the axes of the transport wheels may also be offset in a parallel manner to that of the cutter wheel. The transport wheels may be mounted in an elastic manner and/or may have an elastic peripheral surface. Each transport wheel is arranged such that it may cooperate in a roller-like manner with the roller sonotrode and/or a ball bearing arranged coaxially or axially parallel to the sonotrode wheel, or with a support wheel which may be set into rotational movement synchronously with the drivable roller sonotrode, but which does not oscillate.
During the cutting, the cutter wheel and the transport wheel e.g. by way of a settable pneumatic force may be pressed against the sheet formation and set into rotational movement. The sheet formation on the one hand is clamped between the cutter wheel and the transport wheel, and on the other hand between the roller sonotrode and/or the ball bearing or the support wheel. The sheet formation is advanced in a guided manner in the region of the cutter by way of the rotational movement of the transport wheel in combination with the rolling resistance or the adhesive friction on the sheet formation. The sheet formation in the region of the cutter wheel is softened and severed by the oscillation energy of the sonotrode. Undesirable shearing forces in the region of the softened cut edges of the sheet formation and a distortion of the sheet formation caused by such forces are πiinimal on account of the rotational movement of the anvil wheel or cutter wheel. The pile-like front side of the sheet formation lies on the roller sonotrode which is wide compared to the cutter. The pile is pressed together onto the rear side of the sheet formation by way of the pressing force of the cutter wheel. The pressing pressure acting on the pile is at its greatest directly at the cutter and reduces towards the edge of the roller sonotrode on both sides. The cutter serves as an anvil if energy is supplied to the sheet formation from the sonotrode excited into ultrasonic oscillation. The sheet formation is greatly softened or melted between the cutter and the sonotrode. The cutter penetrates the back of the sheet formation and the pressed-together pile. The supply of energy directly next to the cutter is high enough for the pile to be melted or sealed along the cut edges. The fraying of the pile is prevented by way of this. The rotational movement of the cutter wheel during the cutting favours the formation of clean, uniform cut edges and prevents pile parts from clinging to the cutter.
The invention is hereinafter described in more detail by way of a few figures. With this there are shown in:
Figure 1 a schematic representation of an ultrasonic cutting device of a first embodiment,
Figure 2 a schematic representation of an arrangement with a roller sonotrode and a cutter wheel, in a lateral view, Figure 3 a cross section of an arrangement with a roller sonotrode and a cutter wheel, in a front elevation,
Figure 4 a cross section of a part of a cutter wheel with a transport wheel held thereon, in a first design,
Figure 5 a cross section of a part of a cutter wheel with a transport wheel held therein, in a further design,
Figure 6 a schematic representation of an ultrasonic cutting device of a second embodiment,
Figure 7 a schematic representation of an arrangement with a roller sonotrode and a cutter wheel, in a lateral view,
Figure 8 a cross section of an arrangement with a roller sonotrode and a cutter wheel,
Figure 9 a cross section of a further arrangement with a roller sonotrode, cutter wheel and two transport wheels arranged laterally of the cutter wheel.
Figure 1 shows an ultrasonic cutting machine 1 with an operating table 3 and with an upper arm 7 which is held on a stand 5. A head part 9 is mounted in a displaceable or adjustable manner in the vertical direction. This is illustrated in Figure 1 by the direction arrows Pl, P2. A motor-driven anvil wheel or cutter wheel 11 which is rotatable about a first rotation axis Al, with a peripheral cutter 12 projects beyond the lower end of the head part 9. The cutter 12 may have a rectangular or trapezoidal cross section. A gap opening 13 is recessed in the operating table 3 below the cutter wheel 11. A motor-driven, wheel-like sonotrode or rotor sonotrode or roller sonotrode 15 is rotatably mounted below the operating surface of the table 3 about a further rotation axis A3. The sonotrode 15 may be excited into ultrasound oscillation by way of a high- frequency generator 17 which is controlled by a control 19. For cutting or for separating a textile or non-textile sheet formation 21 (represented in Figure 1 by an interrupted line and transparently for. an improved overview of the machine details), the control 10 controls the drive or drives for the roller sonotrode 15 and the cutter wheel 11 in a manner such that these wheels 11, 15 move with an opposite rotational direction as this is represented in Figure 1 by way of the direction arrows P3, P4. The head part 9 is lowered; wherein the distance s (Figure 2) between the cutter 12 of the cutter wheel 11 and the peripheral surface of the roller sonotrode 15 reduces. If the cutter wheel 11 lies on the sheet formation 21, the head part 9 continues to be impinged e.g. pneumatically with pressure, so that the sheet formation 21 is firmly clamped between the sonotrode 15 and the cutter wheel 11. The sheet formation 21 is softened or melted in the region of the cutter 12 or of the cutter wheel 11 by way of supplying ultrasound energy to the roller sonotrode 15. The contact pressure of the cutter 12 is high in comparison to the region of the cutter wheel periphery which borders the cutter. For this reason the sheet formation 21 is separated between the cutter 12 and the roller sonotrode 15. With a thickness d of the sheet formation 21 which is similar or larger in comparison to the cutter height h (Fig. 2), ultrasound energy is additionally transferred to the sheet formation 21 also between the region or regions of the cutter wheel periphery, said region or regions bordering the cutter 12, and the roller sonotrode 15. Thus the zones of the sheet formation 21 which also directly border the cut edge are also melted or softened. By way of this the cut edges may be sealed or welded in a favourable manner even with long-pile sheet formations. The cutter wheel 11 has a cutter wheel width m of for example 7mm, the cutter 12 a cutter width k for example of 1.5 mm (Figure 3). Of course the cutter wheel 11 and the cutter 12 may also have larger or smaller widths. The cutter 12 - as is represented in Figure 3 - may be designed symmetrically or centrally on the cutter wheel 11. Preferably however - as is shown schematically in Figure 3 - it is arranged displaced slightly out- of-centre in the axial direction towards the cutter wheel edge. The cutter wheel 11 may thus be mounted on the head part 9 in two different ways. In one case the cutter 12 is offset out-of-centre in the direction of the cutter wheel axis Al to the left side and in the other case to the right side. With an excessive wearing or a formation of grooves on the peripheral surface of the roller sonotrode 15 by the contact with the cutter 12, the cutter wheel 11 may be disassembled and reversely may be assembled again. By way of this, the contact location between the cutter 12 and the sonotrode wheel 15 is altered, and the sonotrode wheel 15 may be used for longer before it needs to be replaced.
The cutter 12 projects beyond the adjacent region of the cutter wheel 11 by the height h. The diameter Dl (Fig. 2) of the cutter wheel 11 in the region of the cutter 12 is for example approx. 80mm. Small cutter diameters Dl are basically required in order to be able to cut tight radii on the sheet formations 21. The cutter diameters Dl should however be larger than about 20mm since cutters 12 with smaller diameters Dl are excessively heated and worn. Moreover with the cutters 12 with smaller diameters Dl one must, reckon with loud whistling noises during , the welding. It has been shown that the cutter. wheels 11 with a cutter diameter Dl in the region of about 25 mm to about 100mm, in particular those with . a diameter. Dl of about 80mm are particularly suitable.
A transport wheel 23 is rotatably mounted about a second axis A2 on one or both sides of the cutter wheel 11. The second axis A2 may be arranged axially parallel to the first rotational axis
Al of the cutter wheel 11 or may be identical to this first rotation axis Al. In particular, the transport wheels 23 may be held on the cutter wheel 11 in a rigid or elastically resilient manner. The transport wheel or wheels 23 may be driven by the same motor (not shown) as the cutter wheel 11. Alternatively the transport wheels 23 may also be driven by independent motors.
The width n of the transport wheels 23 is dimensioned such that the transport wheel 23 may cooperate with the roller sonotrode 15 in a roller-like manner. If the width b of the roller sonotrode 15 is too narrow for this purpose then one may provide support rollers (not shown) which are actively or passively drivable coaxially or generally axially parallel to the roller sonotrode 15 on one side or both sides of the roller sonotrode 15, and which alternatively or additionally to the roller sonotrode 15 serve as rotatable counter press rollers for the transport wheels 23.
In a first design, as is illustrated in Figure 4, the transport wheel 23 is connected to the cutter wheel 11 in a rotationally fixed manner by way of a positive-fit or a non-positive fit connection (not shown), for example by way of screws or by way of an adhesive. Alternatively the transport wheel 23 and the cutter wheel 11 may also be formed as one piece. A peripheral notch or groove 25 is formed along the periphery of the transport wheel 23. An elastic spring element 27 in the form of an O-ring of e.g. rubber, nitrile or silicone is preferably applied or fixed in the groove 25 in a slightly tensioned manner. The transport wheel 23 may be designed such that the outer diameter of the O-ring is smaller, equal or larger than the diameter of the cutter wheel periphery 10. Depending on the properties such as e.g. thickness or sliding friction of the sheet formation 21 to be separated it may even be useful for the outer diameter of the O-ring clamped into the groove 25 to be slightly larger than the outer diameter Dl of the cutter 12. The spring element 27 in this case needs to be adequately elastically deformable. A shaft receiver 29 for fastening a motor-driven shaft (not represented) is recessed centrally at the cutter wheel 11 and at the transport wheel 23.
With a further design, as is illustrated by Figure 5, the transport wheel 23 has the shape of a flange with a tubularly projecting shaft receiver 29. The transport wheel 23 is designed as a metal ring and has a peripheral surface which is structured, e.g. by way of channels. Its inner diameter D5 is somewhat larger than the outer diameter D4 of the shaft receiver 29. The transport wheel .23 with one of the side surfaces lies on the facing side surface of the cutter wheel 11 and is arranged coaxially or symmetrically to the rotation axis Al of the cutter wheel 11. Even if the side surfaces of the cutter wheel 11 and of the transport wheel 23 bear on one another, no high-energy oscillation may be transmitted from the cutter wheel 11 to the transport wheel 23 due to the separation of the two wheels 11 , 23.
The gap between the shaft receiver 29 and the inner edge of the transport wheel 23 may e.g. be about 2.5mm to about 10mm wide. The elastic spring element 27 is pressed or admitted into this gap, for example as a pressed-in rubber or silicone ring, which ensures a non-positive or friction fit connection between the shaft receiver 29 and the transport wheel 11. In a particularly advantageous embodiment the spring element is a silicone-containing cast mass which is filled into the gap, is gelled or cured. With a gap width of about 5mm it is ensured that on the one hand the damping behaviour of the silicone mass is sufficiently good for preventing or reducing the transmission of high-energy radial oscillation between the cutter wheel 11 and the guide wheel or transport wheel 23, and that on the other hand the transport wheel 23 is elastically mounted with an adequate stability.
During the cutting, the roller sonotrode 15 and any support wheels on the one hand rotate, and the cutter wheel 11 and the transport wheel or wheels 23 rotate in the opposite rotational direction. The sheet formation 21 is pulled forward or advanced in a guided manner in the cutting direction T (Fig. 1) between the transport wheel or wheels 23 and the roller sonotrode 15 or any support wheels. The advance speed may be equal or a little larger or a little smaller than the peripheral speed of the cutter 12. The sheet formation 21 between the cutter 12 and the oscillating roller sonotrode 15 is softened or melted (with thermoplastic materials) and separated. The cut width corresponds essentially to the cutter width k. The freshly formed cut edges may be uniformly structured, embossed or sealed laterally of the cutter 12 between the roller sonotrode 15 and the peripheral surface 31 of the cutter wheel 11 and/or the peripheral surface of the transport wheel 23, depending on the design of the cutter wheel. Fluctuations in quality as may arise with conventional ultrasound cutting due to the manual advance are minimal on account of the controlled advance of the sheet formation 21. For this reason even higher cutting speeds are possible with the method according to the invention.
With further designs of the cutting machine 1, the roller sonotrode 15 may also be admitted at the top on the head part 9, and the cutter wheel in the operating table 3.
Moreover one may also envisage various parameters such as e.g. the advance speed, the welding power or the pressing pressure to be set or to be changed controlled or regulated by the control 19. In particular a foot regulator 33 (Figure 1) may be provided for influencing the advance speed. .
Figure 6 shows an ultrasonic cutting machine 1 with an operating table 3 and with an upper arm 7 which is held on a stand 5. A head part 9 is mounted in a displaceable or adjustable manner in the vertical direction. This is illustrated in Figure 6 by the direction arrows Pl, P2. A motor-driven anvil wheel or cutter wheel 11 which is rotatable about a first rotation axis Al, with a peripheral cutter 12 projects beyond the lower end of the head part 9. A gap opening 13 is recessed in the operating table 3 below the cutter wheel 11. A motor-driven, wheel-like sonotrode or rotor sonotrode or roller sonotrode 15 is rotatably mounted below the operating surface of the table 3 about a further rotation axis A3. The sonotrode 15 may be excited into ultrasound oscillation by way of a high-frequency generator 17 which is controlled by a control 19. For cutting or for separating a textile or non-textile sheet formation 21 (represented in Figure 6 by an interrupted line and transparently for an improved overview of the machine details), the control 10 controls the drive or drives for the roller sonotrode 15 and the cutter wheel 11 in a manner such that these wheels 11, 15 move with an opposite rotational direction, as this is represented in Figure 6 by way of the direction arrows P3, P4. The head part 9 is lowered, wherein the distance s (Figure 7) between the cutter 12 of the cutter wheel 11 and the peripheral surface of the roller sonotrode 15 reduces. If the cutter wheel 11 lies on the sheet formation 21, the head part 9 continues to be impinged e.g. pneumatically with pressure, so that the sheet formation 21 is firmly clamped between the sonotrode 15 and the cutter wheel 11. The sheet formation 21 is softened or melted in the region of the cutter 12 or of the cutter wheel 11 by way of supplying ultrasound energy to the roller sonotrode 15.
The cutter 12 comprises a preferably rectangular cross section or trapezoidal cross section which tapers with a small inclination angle towards the periphery. The effective cutter width k at the periphery of the cutter 12 preferably lies in the region of about 0.5mm to about 2mm. It is significantly smaller than the cutter wheel width m (Fig. 8 and 9). The cutter height h by which the cutter 12 radially projects beyond the cutter wheel periphery 10 or the cylindrical base body 8 is large compared to the cutter, width k, for example 15 mm. The cutter height h is preferably dimensioned such that it is significantly larger than the thickness d of the sheet formation 21 to be cut. By way of this it is ensured that the regions of the cutter wheel periphery 10 which border the cutter do not come into contact with the sheet formation 21 during the cutting. The transmission of ultrasonic energy to the sheet formation 21 is thus effected only between the cutter 12 and the sonotrode 15, but not between the cutter wheel periphery 10 and the sonotrode 15. The ratio of the contact pressure of the cutter 12 on the sheet formation 12 to the pressing force which is to be applied is thus relatively large. Moreover the mass of the cutter wheel 11 which is large compared to the mass of the cutter 12 has a positive effect for the anvil function of the cutter wheel 12. The energy transfer to the sheet formation 21 is concentrated in the region between the cutter 12 and the sonotrode 15. This favours the formation of uniform cut edges. . .
The effective sonotrode width b on the periphery of the sonotrode 15 is larger than the cutter width k. As in Figure 8, it may be smaller or equal to, or as in Figure 9, larger than the cutter wheel width k. The cutter 12 - as is schematically represented in Figure 9 — may be designed symmetrically or centrally on the cutter wheel 11. Preferably however - as is shown schematically in Figure 8 - it is arranged displaced out-of centre in the axial direction towards the cutter wheel edge. The cutter wheel 11 may thus be mounted on the head part 9 in two different ways, so that the cutter 12 is offset out of centre in one case in the direction of the cutter wheel axis Al to the left side and in the other case to the right side. In the case of an excessive wearing or a formation of grooves on the peripheral surface of the roller sonotrode 15 by the contact with the cutter 12, the cutter wheel 11 may be disassembled and reversely may be assembled again. By way of this, the contact location between the cutter 12 and the sonotrode wheel 15 is altered, and the sonotrode wheel 15 may be used for longer before it needs to be replaced.
The diameter Dl (Fig. 7) of the cutter wheel 11 in the region of the cutter 12 is for example approx. 80mm. Small cutter diameters Dl are basically required in order to be able to cut tight radii on the sheet formations 21. The cutter diameters Dl should however be larger than about 20 mm since cutters 12 with a smaller diameter Dl are excessively heated and worn. Moreover with the cutters 12 with smaller diameters Dl one must reckon with loud whistling noises during the welding. It has been shown that the cutter wheels 11 with a cutter diameter Dl in the region of about 25 mm to about 100mm, in particular those with a diameter Dl of about 80mm are particularly suitable.
With one advantageous design of the invention one may provide transport wheels 23 which are rotatably mounted about a second axis A2 on one or both sides of the cutter wheel 11. The second axis A2 may be arranged axially parallel to the first rotational axis Al of the cutter wheel 11 or - as shown in Figure 4 - may be identical to this first rotation axis Al. In particular, the transport wheels 23 may be held on the cutter wheel 11 in a rigid or elastically resilient manner. The transport wheel or wheels 23 may be driven by the same motor (not shown) as the cutter wheel 11. Alternatively the transport wheels 23 may also be driven by independent motors.
The width n of the transport wheels 23 is dimensioned such that the transport wheels 23 may cooperate with the roller sonotrode 15 in a roller-like manner. If the width b of the roller sonotrode 15 is too narrow for this purpose then one may provide support rollers or wheels or ball bearings (not shown) which are actively or passively drivable coaxially or generally axially parallel to the roller sonotrode on one side or both sides of the roller sonotrode 15, and which alternatively or additionally to the roller sonotrode 15 serve as rotatable counter press rollers for the transport wheels 23.
In the design shown in Figure 9 two transport wheels 23 are connected to the cutter wheel 11 in a rotationally fixed manner by way of a positive-fit or a non-positive fit connection (not shown), for example by way of screws or by way of an adhesive. Alternatively the transport wheels 23 and the cutter wheels 11 may also be formed as one piece. In each case one peripheral notch or groove 25 is formed along the periphery of the transport wheels 23. An elastic spring element 27 in the form of an O-ring of e.g. rubber, nitrile or silicone is preferably applied into the groove 25 in a slightly tensioned manner. . .. The outer diameter of the transport wheels 23 or the O-rings, depending on properties such as e.g. the thickness or the sliding friction of the sheet formation 21 to be separated, is matched to the sheet formation 21 such that the O-rings are pressed with a slight pressing force against the back 22 or the rear side of the sheet formation 21 which faces the cutter 12 during the cutting. In the example of Figure 4 the O-rings project beyond the cutter wheel periphery 10, but the cutter 12 projects beyond these O-rings.
The spring elements 27 or the O-rings, which are formed on the transport wheels 23 are designed such that any energy transfer to the sheet formation 21 between the sonotrode 15 and the spring elements 27 is negligibly small.
A shaft receiver 29 for fastening to a motor-driven shaft (not shown) is provided centrally in the cutter wheel 11 and in the transport wheel 23.
During the cutting the transport wheels 23 are driven, and rotate synchronously with the cutter wheel 11 and the roller sonotrode 15 about the axis Al or A2. With designs with independent drives for the cutter wheel 11 and for the transport wheels 23, the rotational speed or the peripheral speed of the cutter wheel 23 may also be larger or smaller than the rotational speed or peripheral speed of the transport wheels 23. The peripheral speeds of the roller sonotrode 15 and of the cutter 12 may be just as easily selected differently. The quality of the cut edges may be influenced by way of this.
During the cutting, the roller sonotrode 15 and any support wheels on the one hand rotate in one direction, and the cutter wheel 11 and the transport wheel or wheels 23 on the other hand rotate in the opposite rotational direction (Fig. 6).
Due to the non-positive fit or factional fit contact of the O-rings on the back 22 of the sheet formations 21 these are advanced in the cutting direction. Alternatively the advance force may also act in an supporting manner for the manual advance of the sheet formation 21. The guiding of the sheet formation 21 as a rule is effected manually. However one may also provide active or passive guide means which influence, control or regulate the alignment or the position of the sheet formation 21 during the cutting, or the cutting direction.
The sheet formation 21 between the cutter 12 and the oscillating roller sonotrode 15 is softened or melted (with thermoplastic-containing materials) and separated. The cut width corresponds essentially to the cutter width k. According to the invention sheet, formations 21 with a pile-like front side 24 such as e.g. a tuft-carpet is cut with the pile side 24 facing the sonotrode 15. By way of the pressing pressure of the cutter 12 on the back 22, the pile is pressed together in the region of the sonotrode 15 which projects beyond the surface of the operating table 3. The pressing pressure is at its largest directly between the cutter 12 and the sonotrode 15 and reduces towards the lateral edges of the sonotrode 15. By way of this the transmission of ultrasound energy to the sheet formation 21 directly between the sonotrode 15 and the cutter 12 is very large and reduces very rapidly laterally of the cutter 12. In this manner one succeeds in producing clean and uniformly formed cut edges on the sheet formations 21 of subjects with a good efficiency, thus with a relatively low power. Directly laterally of the cutter 12 the energy transfer to the sheet formation 21 is large enough for the pile in the region of the cut edge to be sealed in a manner such that a later fraying is prevented, or the danger of fraying is minimised.
With further designs of the invention may envisage various parameters such as e.g. the advance speed, the welding power or the pressing pressure to be set or to be changed or controlled or regulated by the control 19. In particular the peripheral speeds of the sonotrode 15 and of the cutter 12 may be equal or different.

Claims

1. A transport device for an ultrasonic cutting machine (1) with a sonotrode (15) and with a cutter wheel (11) for cutting textile and non-textile sheet formations (21) which is arranged opposite the sonotrode (15) and is rotatable about a first rotation axis (Al), characterised in that at least one transport wheel (23) rotatable about a second rotation axis (A2) is rotatably held laterally of the cutter wheel (11).
2. A transport device according to claim 1, characterised in that the second rotation axis A2 is identical to the first rotation axis Al .
3. A transport device according to one of the claims 1 or 2, characterised in that the transport wheel (23) comprises an elastic spring element (27).
4. A transport device according to claim 3, characterised in that the spring element (27) is an elastic ring which encompasses or embraces the transport wheel (23).
5. A transport device according to one of the claims 3 or 4, characterised in that a peripheral channel or groove (25) for fixing in the spring element (27) is formed on the peripheral surface of the transport wheel (23).
6. A transport device according to one of the claims 3 to 5, characterised in that the transport wheel (23) and the cutter wheel (11) are formed as one piece or are rigidly connected to one another.
7. A transport device according to claim 3, characterised in that the transport wheel (23) comprises a peripheral ring, and that the elastic spring element (27) is formed bordering the inner peripheral surface of the peripheral ring.
8. A transport device according to claim 7, wherein the rotation axes (Al, A2) of the cutter wheel (11) and of the transport wheel (23) are identical, characterised in that the cutter wheel (11). is designed in a flange-like manner with a shaft receiver (29) which projects on one or both sides in the direction of the first rotation axis (Al), and that the spring element (27) is designed as an elastic connection ring between the shaft receiver (29) and the peripheral ring.
9. A transport device according to one of the claims 7 or 8, characterised in that the spring element (27) is a cured or gelled silicone-containing cast mass.
10. A transport device according to one of the claims 1 to 9, characterised in that transport wheels (23) are provided on both sides of the cutter wheel (11).
11. A transport device according to one of the claims 1 to 10, characterised in that the outer diameter of the transport wheel (23) is smaller or equally large as the outer diameter of the cutter
(12) of the cutter wheel (11).
12. A transport device according to one of the claims 1 to 11, characterised in that the transport wheel (23) is capable of being motor-driven directly or indirectly.
13. A method for cutting textile or non-textile sheet formations (21), wherein the sheet formations (21) are separated between a sonotrode (15) and a cutter wheel (11), characterised in that the sheet formations (21) are pulled forward or advanced by way of one or more transport wheels (23) arranged laterally of the cutter wheel (11).
14. A method according to claim 13, characterised in that the cut edges are sealed or welded in a uniform manner.
15. Subjects manufactured with the method according to one of the claims 13 or 14, characterised in that the cut edges are formed in a uniform manner.
16. A method for cutting sheet formations (21) with a pile-like front side (24) and with a compact back (22), by way of an ultrasonic cutting machine (1), wherein this ultrasonic cutting machine (1) comprises a rotatable sonotrode (15) and a cutter wheel (11) cooperating with the sonotrode (15), and having a peripheral cutter (12), characterised in that the sheet formations (21) are cut in that, with the pile-like front side (24) facing the sonotrode, they are led through between the sonotrode (15) and the cutter wheel (11), and are pressed together between the sonotrode (15) and the cutter (12) by way of a force acting on the sonotrode (15) and/or the cutter wheel (11), wherein the sonotrode (15) is excited for carrying out high-frequency oscillation. . . . .
17. A method according to claim 16, characterised in that the pile-like front side (24) of the sheet formation (21) is pressed together on the whole effective sonotrode width (b), wherein the pressing force, proceeding from the pressing location of the cutter wheel (11), reduces towards the wheels of the sonotrode (15).
18. A method according to one of the claims 16 or 17, wherein the sonotrode (15) projects from below through a gap (13) in an operating plate (table) (3), characterised in that the sheet formation (21) to be cut is led by hand with the pile-like front side (24) lying on the operating plate (3).
19. A method according to one of the claims 16 to 18, characterised in that the pressing pressure of the cutter (12) on the sheet formation (21) to be cut, and/or the energy supply to the sonotrode (15) is set, controlled or regulated in a manner such that the back (22) is uniformly separated, and that the cut edges are sealed in a manner such that a fraying of the pile-like front side (24) along the cut edges is prevented.
20. An ultrasonic cutting machine (1) for carrying out the method according to one of the claims 16 to 19, characterised in that the cutter wheel (11) comprises a cutter (12) with a shape which in cross section is rectangular, or tapers in a trapezoidal manner towards the periphery.
21. An ultrasonic cutting machine (1) according to claim 20, characterised in that the width of the cutter (12) at its peripheral contact surface is between 0.5mm and 3mm.
22. An ultrasonic cutting machine (1) according to one of the claims 20 or 21, characterised in that the cutter (12) is designed as a narrow peripheral ring on a wider annular base body (8) which is arranged at the inside.
23. An ultrasonic cutting machine (1) according to one of the claims 20 to 22, characterised in that the cutter (12) has an outer diameter (Dl) in the region of about 25mm to about 150mm.
24. An ultrasonic cutting machine (1) according to one of the claims 20 to 23, characterised in that the cutter (12) has a height (h) which is larger than the thickness (d) of the sheet formation
(21) to be cut.
25. Subjects manufactured according to the method according to one of the claims 16 to 19, characterised in that the cut edges are formed uniformly and are sealed in a manner such that a fraying of the pile-like front side (24) is prevented.
PCT/EP2005/011445 2004-10-28 2005-10-25 A transport device for an ultrasonic cutting machine, an ultrasonic cutting machine, and a method for cutting sheet formations WO2006045595A1 (en)

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WO2009122251A1 (en) * 2008-04-01 2009-10-08 Jaked S.R.L. Apparatus and method for welding membranes
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WO2010017883A3 (en) * 2008-08-11 2010-06-10 Pfaff Industriesysteme Und Maschinen Ag Device for welding and cutting single-ply or multi-ply materials using ultrasound energy
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CN107405778A (en) * 2015-03-27 2017-11-28 泛诺泰有限责任公司 For cutting material sheet material or the device of material layer
FR3037271A1 (en) * 2015-06-12 2016-12-16 Centre Technique Des Ind Mec INSTALLATION OF THIN FILM CUTTING OF SYNTHETIC MATERIAL
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US10328579B2 (en) 2015-06-12 2019-06-25 Centre Technique Des Industries Mecaniques Unit for cutting thin films of synthetic material
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CN108016046A (en) * 2017-12-30 2018-05-11 福建优安纳伞业科技有限公司 A kind of umbrella cloth double end ultrasonic wave edging machine
CN108016046B (en) * 2017-12-30 2023-06-30 福建优安纳伞业科技有限公司 Umbrella cloth double-end ultrasonic beading machine
CN109129636A (en) * 2018-08-20 2019-01-04 滁州市棋然装饰工程有限公司 Cutting equipment is used in a kind of production of door and window
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CN111716687A (en) * 2020-06-02 2020-09-29 唐金 Resin tile suppression side cut device for building engineering
CN115320114A (en) * 2022-08-05 2022-11-11 东莞市日东智能装备有限公司 Curtain seamless splicing process and spliced curtain

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