EP3013560A1 - Cross seam joining device for joining a sealing seam for a flexible packaging - Google Patents

Cross seam joining device for joining a sealing seam for a flexible packaging

Info

Publication number
EP3013560A1
EP3013560A1 EP14708053.5A EP14708053A EP3013560A1 EP 3013560 A1 EP3013560 A1 EP 3013560A1 EP 14708053 A EP14708053 A EP 14708053A EP 3013560 A1 EP3013560 A1 EP 3013560A1
Authority
EP
European Patent Office
Prior art keywords
seam
mhz
joining
ultrasonic
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14708053.5A
Other languages
German (de)
French (fr)
Inventor
Marko Liebler
Lukas OEHM
Ulrich Wieduwilt
Sascha Bach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3013560A1 publication Critical patent/EP3013560A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B29C66/8491—Packaging machines welding through a filled container, e.g. tube or bag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • 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
    • B29C65/745—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 a single unit having both a severing tool and a welding 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
    • 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
    • B29C65/745—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 a single unit having both a severing tool and a welding tool
    • B29C65/7451—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 a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • B29C66/0326—Cutting, e.g. by using waterjets, or perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • 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
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81417—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled being V-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81419—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled and flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—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
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81465—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed behind the other in a single row in the feed direction
    • 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
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B29C66/83513—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums cooperating jaws mounted on rollers, cylinders or drums and moving in a closed path
    • 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
    • B29C66/849—Packaging machines
    • 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
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9513—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools characterised by specific vibration frequency values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9517—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools characterised by specific vibration amplitude values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/22—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
    • B65B51/225—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding by ultrasonic welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/306—Counter-rotating devices
    • 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
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave

Definitions

  • Cross-seam joining device for joining a sealed seam for a flexible seam
  • the present invention relates to a device for joining a transverse seam of a flexible packaging and in particular to a device for joining a transverse seam of a tubular bag packaging by means of an ultrasonic applicator.
  • the film After forming the packaging material on the forming shoulder, the film is added to a packaging tube by means of the longitudinal seam. After the product has been fed, the transverse seams are sealed, but the product can also be fed during tube formation. Subsequently, the
  • Packaging material hose separated into individual tubular bags by cutting function.
  • conventional ultrasound systems consist of a converter, an optional booster and a sonotrode.
  • the vibration generated in the converter by the inverse piezoelectric effect is amplified in the booster and conducted via the sonotrode into the packaging material.
  • a standing wave is formed.
  • the tools, in particular the sonotrode must be designed as ⁇ / 2 oscillator and thus subject to geometric restrictions.
  • These functional limitations mean that the application application on the tubular bag machine must be based on the functional principle of the sonotrode and not on the dimensions of the packaging.
  • the production the sonotrodes proves to be complex and expensive. Which is one of the reasons why this expensive technology is only used on the market for special applications.
  • the heat generation in the packaging material is based on internal friction and
  • the sound is introduced into the joining zone usually perpendicular to
  • DT 1704204 A a method for joining plastic parts based on focused ultrasound is known.
  • the ultrasonic waves generated by a vibrator with a frequency above 100 kHz are bundled by the vibrator geometry or a focusing device and transmitted through a liquid medium to the joint.
  • the sound waves conducted through the liquid medium excite a diaphragm to vibrate, which is pressed onto the plastic parts to be welded.
  • DE 10 2008 044 370 A1 describes a device and a method for connecting components by means of focused ultrasound.
  • the waveguide is formed either by a cone-shaped element made of a metallic solid material or by a liquid-filled or gel-filled membrane. Disclosure of the invention
  • the present invention thus relates to a cross-seam joining device for joining a sealed seam for a flexible packaging with at least one
  • Ultrasonic applicator which is mounted on a shaft and one along the
  • Transverse seam arranged axis of the shaft is rotatable, wherein the
  • Ultrasonic applicator for generating and bundling of ultrasound in a frequency range of 0.1 MHz to 5 MHz, preferably from 0.5 MHz to 2 MHz, is formed.
  • the transverse seam joining device according to the invention for flexible packaging uses a frequency range from 0.1 MHz to 5 MHz, preferably from 0.5 to 2 MHz.
  • the sound conductor forms a progressive and focused wave field.
  • a significant advantage is that the sound conductor does not have to be designed resonantly, quasi exist in terms of its design no restrictions, as is known from conventional ultrasound ago. This means that the effective surface of the ultrasonic application can be optimally adapted to the geometry to be joined, in this case the sealed seam.
  • Focussing devices according to the invention (lens, geometry of the ultrasonic transducer) achieve focusing of the sound waves.
  • the sound conductor is much more compact compared to the geometric one
  • the sound transducer can be fixed at any point.
  • the attachment can be done very close to the joint, thus this variant is much stiffer than it is with a mounting in the
  • Vibration node is possible.
  • the ultrasonic waves are introduced in a focused manner in the region of the sealed seam.
  • Ultrasonic applicator an ultrasonic transducer for vibration generation, a
  • Focusing device and a sound conductor comprises. This makes it possible to design the ultrasonic applicator according to the respective design requirements and to dimension.
  • the ultrasonic energy is precisely introduced into the joint area.
  • the invention provides that the ultrasonic applicator is mounted on a carrier connected to the shaft.
  • a plurality of ultrasonic applicators can be arranged on a rotatable support in order to effectively produce precise joint seams in this way.
  • the shaft can be stored at any position, as no transverse or longitudinal
  • Vibrations as known from conventional rotating vibrating structures, are transmitted to the shaft.
  • the complete oscillating structure, ie sealing tunnel and shaft is tuned to the exciter frequency. This embodiment means extremely high
  • the sealing surface can be optimally adapted to the product, regardless of the wavelength.
  • a rotatably mounted about an axis, provided with at least one knife counter-holder is provided, wherein the axis is arranged parallel to the axis of the shaft.
  • the knife serves to separate the individual foil bags.
  • both sides of the transverse seam for forming a top seam and a seam cross-seam each have an ultrasonic applicator is provided.
  • the head seams and foot seams of the transverse seam can each by means of a separate
  • the ultrasonic transducer is preferably plate-shaped. This simplifies the production and leads to a reduction in costs and secures a reliable function by the way.
  • the focusing device is formed lens-shaped.
  • the counter-holder is made of a ceramic material. This gives favorable friction conditions.
  • the ceramic material is resistant to wear.
  • FIG. 1 is a schematic representation of the operation of the
  • FIG. 3 is a simplified perspective detail view of
  • FIG. 4 shows a schematic representation of the embodiment of a vertical cross-seam joining device according to the invention
  • Figure 5 is a schematic perspective view of a
  • Figure 6 is a schematic representation of two ultrasonic applicators and two counter-holder and a knife in a further embodiment of the invention.
  • Tubular bag machines include the ultrasound joining of flexible thermoplastic materials in the range of 0.1 MHz to 5 MHz, preferably from 0.5 MHz to 2 MHz.
  • a correspondingly high counterforce is necessary so that the sonotrode does not lift off and can act mechanically on the packaging material.
  • Anvil an energy director to melt the
  • the joining device according to the invention generates by means of a
  • Ultrasonic applicator at a frequency of e.g. 1 MHz has an amplitude of e.g. only 1 -2 ⁇ on the sound conductor. This very small amplitude does not produce any
  • the energy input (FIG. 1) into the packaging material to be joined takes place by means of heating 40 in the focal region of the ultrasound applicator virtually directly in the joining zone and not by means of hammering as in the prior art
  • FIG. 1 The operation and application of the joining device according to the invention for the longitudinal and transverse seam on a HFFS machine is shown in FIG. From a packaging material roll 1, a packaging material web 2 is guided over a guide roll 3 and formed via a forming shoe 4 into a packaging material tube 8. Thereafter, a Finn or lap seam is joined with a longitudinal seal 6. The products are 5, after which these of the product chain the
  • Cross-sealing device 7 adds the two transverse sealing seams of the tubular bag and performs between the seals and the separating function 9 by means of separation.
  • the ultrasonic applicator according to the invention can be attached directly to the joint, but any other mounting options on the sound conductor are possible.
  • An anvil with energy directors is not required for the formation of the joint seam, since the melting of the sealing layers takes place at the connection point mainly in the region of the linear focus region.
  • Cross-sealing device 7 are four sealing lugs in the form of wedge-shaped
  • Sound conductors 13c provided on a rotatable about an axis 13e fundamental 13d.
  • the embodiments may vary from one to eight sealing studs and in contrast to the rotary ultrasonic sonotrode according to the prior art also have an odd number of sound conductors.
  • Sound conductor 13c can be both positive or positive type.
  • Oscillations in the range of 0.1 MHz to 5 MHz, preferably in the range of 0.5 MHz to 2 MHz, are converted by an ultrasonic transducer, for example a piezoceramic, 13a via a focusing 13b by means of a sound conductor 13c in a heat line.
  • This heat line generates the necessary for the sealing process temperature entry in the joining materials.
  • the joining pressure necessary for the joining process is applied and at the same time the pinch or cutting force corresponding to the cutting process is generated.
  • a packaging material tube with product 8 is fed to the applicator and counter-holder unit 14 rotating synchronously about an axis 13f.
  • the top seam of the leading tubular bag 9 is formed.
  • the Separation function and further unwinding of the sealing lugs, the foot seam of the trailing tubular bag (9) is formed.
  • Vibration load of the drive shaft 13d This allows the storage directly in the end shields (not shown).
  • a vibration decoupling by means of sleeves which are fixed in the nodes of the wave is not necessary.
  • the storage can be done at any desired position of the shaft.
  • a packaging material web is also formed into a film tube 102 by means of a forming shoulder 101.
  • a subsequent longitudinal sealing device 103 according to the invention adds an overlap or a Finn seam.
  • a sound conductor 103 which is responsible for the heat input, is located immediately below the forming shoulder 101, where the film is formed into a tube 102. This very simple design can work on everyone
  • the sealing device according to the invention shown in Figure 5 consists of an ultrasonic transducer 37 with a sieinnchtung 38 and a
  • a working surface 42 is in the design of the sealed seam length 45 (see Figure 1) regardless of the wavelength of the system frequency as in conventional ultrasound and thus it can be an arbitrarily large
  • the counter-holder 44 is provided with a knife for the cutting function, by means of which the tubular bags are separated.
  • the sealing device according to the invention can be made very compact, since neither a converter nor a booster for the function are necessary.
  • the mass reduction in combination with the compact design has a very positive effect on the dynamics of the box-type machine, which operates in a box-motion motion.
  • the output of the tubular bag machine can be increased.
  • sealing system As a result, the sealing of the prospectivenaht 1 1 1 from the top and the top seam 1 10 made from the lower tubular bag 47 at the same time or with a time delay.
  • reference numeral 46 shows an upper package
  • reference numeral 47 shows a lower package.
  • the cutting blade 43 is arranged separately from the counter-holders 44.
  • the ultrasound applicator is constructed analogously to the exemplary embodiment of FIG. 5 and comprises an ultrasound transducer 37, a focusing device 38 and a sound conductor 39. In simplified form, the propagating waves are shown in the sound conductor 39.

Landscapes

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

Abstract

The invention relates to a cross seam joining device for a flexible packaging having at least one ultrasonic applicator (13a - 13c), which is rotatably mounted on a shaft (13d) and can be rotated about an axis (13e) of the shaft (13d) arranged longitudinally to the cross seam (110, 111). The ultrasonic applicator (13a - 13c) is designed to produce and bundle ultrasounds in a frequency range of 0,1 MHz - 0, 5 MHz, preferably from 0,5 MHz - 2 MHz.

Description

Beschreibung  description
Titel title
Quernahtfügevorrichtung zum Fügen einer Siegelnaht für eine flexible  Cross-seam joining device for joining a sealed seam for a flexible seam
Verpackung packaging
Stand der Technik State of the art
Die vorliegende Erfindung betrifft eine Vorrichtung zum Fügen einer Quernaht einer flexiblen Verpackung und insbesondere eine Vorrichtung zum Fügen einer Quernaht einer Schlauchbeutelverpackung mittels eines Ultraschallapplikators. The present invention relates to a device for joining a transverse seam of a flexible packaging and in particular to a device for joining a transverse seam of a tubular bag packaging by means of an ultrasonic applicator.
Es sind bereits Vorrichtungen bekannt, bei denen auf horizontalen und vertikalen Schlauchbeutelmaschinen mittels konventionellen Ultraschalls im Bereich von 20 bis 40kHz Fügeverbindungen an Verpackungen hergestellt werden. Devices are already known in which joining connections to packaging are produced on horizontal and vertical tubular bag machines by means of conventional ultrasound in the range from 20 to 40 kHz.
Nach dem Formen des Packstoffes auf der Formschulter wird mittels der Längsnaht die Folie zu einem Packstoffschlauch gefügt. Nach der Zuführung des Produkts werden die Quernähte gesiegelt, die Produktzuführung kann aber auch schon während der Schlauchbildung erfolgen. Anschließend wird der After forming the packaging material on the forming shoulder, the film is added to a packaging tube by means of the longitudinal seam. After the product has been fed, the transverse seams are sealed, but the product can also be fed during tube formation. Subsequently, the
Packstoffschlauch in einzelne Schlauchbeutel mittels Schneidfunktion vereinzelt. Packaging material hose separated into individual tubular bags by cutting function.
Bei den bekannten Vorrichtungen bestehen konventionelle Ultraschallsysteme aus einem Konverter, einem optionalen Booster und einer Sonotrode. Die im Konverter durch den inversen piezoelektrischen Effekt erzeugte Schwingung wird im Booster verstärkt und über die Sonotrode in den Packstoff geleitet. Im resonant schwingenden Gesamtsystem bildet sich eine stehende Welle aus. Die Werkzeuge, insbesondere die Sonotrode, muss dabei als λ/2 Schwinger ausgeführt sein und unterliegt damit geometrischen Restriktionen. Diese funktionalen Einschränkungen bedeuten, dass die Anwendungsapplikation auf der Schlauchbeutelmaschine sich an dem Funktionsprinzip der Sonotrode und nicht an den Abmessungen der Verpackung orientieren muss. Die Herstellung der Sonotroden erweist sich als aufwändig und preisintensiv. Was auch ein Grund ist, weshalb diese teure Technik am Markt nur für spezielle Applikationen angewendet wird. Die Wärmeentstehung im Packstoff beruht auf innerer Reibung und In the known devices, conventional ultrasound systems consist of a converter, an optional booster and a sonotrode. The vibration generated in the converter by the inverse piezoelectric effect is amplified in the booster and conducted via the sonotrode into the packaging material. In the resonantly oscillating overall system, a standing wave is formed. The tools, in particular the sonotrode, must be designed as λ / 2 oscillator and thus subject to geometric restrictions. These functional limitations mean that the application application on the tubular bag machine must be based on the functional principle of the sonotrode and not on the dimensions of the packaging. The production the sonotrodes proves to be complex and expensive. Which is one of the reasons why this expensive technology is only used on the market for special applications. The heat generation in the packaging material is based on internal friction and
Grenzflächenreibung. Zum Aufschmelzen des Packstoffs ist daher eine  Interfacial friction. For melting the packaging material is therefore a
Siegelkraft > 200 N zwischen Sonotrode und Packstoff notwendig. Sealing force> 200 N between sonotrode and packaging material necessary.
Die Schalleinleitung in die Fügezone erfolgt in der Regel senkrecht zur The sound is introduced into the joining zone usually perpendicular to
Fügefläche. Voraussetzung der Wärmeentstehung ist der Einsatz eines Joining surface. Prerequisite of the heat generation is the use of a
Energierichtungsgebers als Gegenstück zur Sonotrode, welcher die Wirkzone des Werkzeug Systems definiert. Energierichtungsgebers as a counterpart to the sonotrode, which defines the effective zone of the tool system.
Aufgrund der beschriebenen stehenden Welle im Schwingsystem sind Due to the described standing wave in the vibrating system are
Befestigungsmöglichkeiten für die Sonotrode nur in den Schwingungsknoten möglich, wo sie eine Zone geringster Ausdehnung hat. In dieser sogenannten Nulllinie sollten kaum Schwingungen vorhanden sein. Eine Verbindung der Sonotrode außerhalb der Schwingungsknoten mit entsprechenden Mounting possibilities for the sonotrode possible only in the nodes, where it has a zone of least extent. There should hardly be any vibrations in this so-called zero line. A connection of the sonotrode outside the nodes with corresponding
Maschinenelementen führt in der Regel auf Grund der extrem hohen Machine elements usually results due to the extremely high
Beschleunigungskräfte zu einem Lösen und Zerstören der Koppelstelle. Acceleration forces to loosen and destroy the coupling point.
Weiterhin ist nach DT 1704204 A ein Verfahren zum Fügen von Kunststoffteilen basierend auf fokussiertem Ultraschall bekannt. Die von einem Vibrator erzeugten Ultraschallwellen mit einer Frequenz über 100 kHz werden durch die Vibratorgeometrie oder eine Fokussiereinrichtung gebündelt und durch ein flüssiges Medium auf die Fügestelle übertragen. Die durch das flüssige Medium geleiteten Schallwellen erregen eine Membran zum Schwingen, welche auf die zu schweißenden Kunststoffteile aufgedrückt wird. Furthermore, according to DT 1704204 A, a method for joining plastic parts based on focused ultrasound is known. The ultrasonic waves generated by a vibrator with a frequency above 100 kHz are bundled by the vibrator geometry or a focusing device and transmitted through a liquid medium to the joint. The sound waves conducted through the liquid medium excite a diaphragm to vibrate, which is pressed onto the plastic parts to be welded.
Des Weiteren beschreibt DE 10 2008 044 370 A1 eine Vorrichtung und ein Verfahren zum Verbinden von Bauteilen mittels fokussiertem Ultraschall. Der Wellenleiter wird dabei entweder durch ein aus einem metallischen Vollmaterial hergestelltes kegelförmiges Element oder aus einer flüssigkeits- oder gelgefüllten Membran gebildet. Offenbarung der Erfindung Furthermore, DE 10 2008 044 370 A1 describes a device and a method for connecting components by means of focused ultrasound. The waveguide is formed either by a cone-shaped element made of a metallic solid material or by a liquid-filled or gel-filled membrane. Disclosure of the invention
Die vorliegende Erfindung betrifft somit eine Quernahtfügevorrichtung zum Fügen einer Siegelnaht für eine flexible Verpackung mit zumindest einem The present invention thus relates to a cross-seam joining device for joining a sealed seam for a flexible packaging with at least one
Ultraschallapplikator, welcher an einer Welle gelagert und um eine längs derUltrasonic applicator, which is mounted on a shaft and one along the
Quernaht angeordnete Achse der Welle drehbar ist, wobei der Transverse seam arranged axis of the shaft is rotatable, wherein the
Ultraschallapplikator zur Erzeugung und Bündelung von Ultraschall in einem Frequenzbereich von 0,1 MHz bis 5 MHz, bevorzugt von 0,5 MHz bis 2 MHz, ausgebildet ist. Mit der erfindungsgemäßen Quernahtfügevorrichtung für eine flexible Verpackung wird ein Frequenzbereich von 0,1 MHz bis 5 MHz, bevorzugt von 0,5 bis 2 MHz, genutzt. Im Schallleiter bildet sich ein fortschreitendes und fokussiertes Wellenfeld aus. Ein wesentlicher Vorteil ist, dass der Schallleiter nicht resonant ausgelegt werden muss, quasi bestehen hinsichtlich dessen Gestaltung keine Restriktionen, wie dies vom konventionellen Ultraschall her bekannt ist. Das bedeutet, dass die Wirkfläche der Ultraschallapplikation optimal der zu fügenden Geometrie, in diesem Fall der Siegelnaht, angepasst werden kann. Durch erfindungsgemäße Fokussiereinrichtungen (Linse, Geometrie des Ultraschallwandlers) wird eine Fokussierung der Schallwellen erreicht. Der Schallleiter ist wesentlich kompakter im Vergleich zur geometrischen Ultrasonic applicator for generating and bundling of ultrasound in a frequency range of 0.1 MHz to 5 MHz, preferably from 0.5 MHz to 2 MHz, is formed. The transverse seam joining device according to the invention for flexible packaging uses a frequency range from 0.1 MHz to 5 MHz, preferably from 0.5 to 2 MHz. The sound conductor forms a progressive and focused wave field. A significant advantage is that the sound conductor does not have to be designed resonantly, quasi exist in terms of its design no restrictions, as is known from conventional ultrasound ago. This means that the effective surface of the ultrasonic application can be optimally adapted to the geometry to be joined, in this case the sealed seam. Focussing devices according to the invention (lens, geometry of the ultrasonic transducer) achieve focusing of the sound waves. The sound conductor is much more compact compared to the geometric one
Ausdehnung der konventionellen Sonotrode und wird nicht in Extension of the conventional sonotrode and will not be in
Resonanzschwingungen versetzt. Diese Eigenschaft ermöglicht es, kleinere Baugruppen zu erstellen und reduziert wesentlich den Fertigungsaufwand.  Resonance vibrations offset. This feature makes it possible to create smaller assemblies and significantly reduces manufacturing costs.
Zudem kann erfindungsgemäß der Schallwandler an jeder beliebigen Stelle fixiert werden. Die Befestigung kann sehr nahe an der Fügestelle erfolgen, dadurch ist diese dargestellte Variante wesentlich steifer als es mit einer Befestigung imIn addition, according to the invention, the sound transducer can be fixed at any point. The attachment can be done very close to the joint, thus this variant is much stiffer than it is with a mounting in the
Schwingungsknoten möglich ist. Die Amplitude der Schallleiterspitze Vibration node is possible. The amplitude of the conductor tip
(Siegelfläche) beträgt maximal nur wenige Mikrometer, was zu einer wesentlich geringeren Packstoff belastung im Vergleich zu den großen Amplituden des konventionellen Ultraschalls (12 - 40 μηη) führt. Bei konventionellen Sonotroden kann die Amplitudenverteilung erheblich schwanken, dieser Nachteil ist an der(Sealing surface) amounts to a maximum of only a few microns, resulting in a significantly lower packaging material load compared to the large amplitudes of conventional ultrasound (12-40 μηη) leads. In conventional sonotrodes, the amplitude distribution can vary considerably, this disadvantage is due to the
Schalleiterspitze des erfindungsgemäßen Ultraschallapplikators nicht feststellbar. Vorteilhafterweise ist bei der Erfindung vorgesehen, dass die Ultraschallwellen fokussiert in den Bereich der Siegelnaht eingeleitet werden. Ein Schalleitererspitze of the ultrasonic applicator according to the invention not detectable. Advantageously, it is provided in the invention that the ultrasonic waves are introduced in a focused manner in the region of the sealed seam. One
Energierichtungsgeber in Form eines schwingungssteifen Ambosses wie beim konventionellen Ultraschall ist nicht notwendig. Zur Schalleinleitung in den Packstoff und somit zu dessen Aufschmelzen ist lediglich der Kontakt von Schallleiter und Packstoff notwendig. Ein erhöhter Anpressdruck wie beim konventionellen Ultraschall ist nicht notwendig. Die Schalleinleitung muss erfindungsgemäß nicht, wie beim konventionellen Ultraschall, senkrecht in die Fügezone, sondern kann in beliebiger Richtung erfolgen. Obwohl die Energy directors in the form of a vibration-resistant anvil as in conventional ultrasound is not necessary. For sound introduction into the Packaging material and thus its melting is only the contact of sound conductor and packaging material necessary. An increased contact pressure as in conventional ultrasound is not necessary. The sound introduction need not according to the invention, as in conventional ultrasound, perpendicular to the joint zone, but can be done in any direction. Although the
Arbeitsfrequenz des konventionellen Ultraschalls oberhalb des menschlich wahrnehmbaren Frequenzbereiches liegt, ist durch Schwingungsanregung des Gesamtaufbaus oder die Anregung von Subharmonischen die Lärmemission problematisch und kann ohne Gehörschutz zu irreparablen Schäden am Gehör führen. Die erfindungsgemäße Vorrichtung ist gegenüber konventionellen Operating frequency of conventional ultrasound is above the human perceptible frequency range, is by vibration excitation of the overall structure or the excitation of subharmonic noise emission problematic and can lead to irreparable hearing damage without hearing protection. The device according to the invention is compared to conventional
Ultraschallverfahren nahezu geräuschlos, da keine Schwingungsanregung im hörbaren Frequenzbereich erfolgt und die hohen Frequenzen in der Luft aber auch in den Maschinenteilen sehr schnell gedämpft werden und sich nicht über größere Distanzen ausbreiten. Konventionelle Ultraschallsysteme schwingen nach dem Abschalten der Energiezufuhr etwa 350 ms nach. Dies stellt eine potentielle Gefahrenstelle für den Bediener dar, da selbst im NOT-AUS-Fall kein sofortiger Stillstand des Schwinggebildes vorliegt. Wird hingegen der Generator der erfindungsgemäßen Vorrichtung abgeschaltet, wird sofort und ohne Ultrasonic technology almost noiseless, since no vibration excitation in the audible frequency range and the high frequencies in the air but also in the machine parts are damped very quickly and do not propagate over long distances. Conventional ultrasound systems oscillate after switching off the power supply for about 350 ms. This represents a potential danger spot for the operator, since even in the emergency stop case there is no immediate standstill of the vibrating structure. If, however, the generator of the device according to the invention is switched off, immediately and without
Verzögerung die Abgabe von Energie in Form von Schallwellen oder mechanischen Schwingungen gestoppt. Delay the delivery of energy in the form of sound waves or mechanical vibrations stopped.
Die Unteransprüche zeigen bevorzugte Weiterbildungen der Erfindung. The dependent claims show preferred developments of the invention.
In bevorzugter Weiterbildung der Erfindung ist vorgesehen, dass der In a preferred embodiment of the invention, it is provided that the
Ultraschallapplikator einen Ultraschallwandler zur Schwingungserzeugung, eineUltrasonic applicator an ultrasonic transducer for vibration generation, a
Fokussiereinrichtung und einen Schallleiter umfasst. Hierdurch ist es möglich, den Ultraschallapplikator den jeweiligen konstruktiven Anforderungen entsprechend auszubilden und zu dimensionieren. Durch die Focusing device and a sound conductor comprises. This makes it possible to design the ultrasonic applicator according to the respective design requirements and to dimension. By the
Fokussiereinrichtung und den Schallleiter wird die Ultraschallenergie präzise in den Fügebereich eingebracht. Focusing device and the sound conductor, the ultrasonic energy is precisely introduced into the joint area.
Weiterhin ist erfindungsgemäß vorgesehen, dass der Ultraschallapplikator an einem mit der Welle verbundenen Träger gelagert ist. Hierdurch können mehrere Ultraschallapplikatoren auf einem drehbaren Träger angeordnet werden, um auf diese Weise effektiv präzise Fügenähte zu erzeugen. Somit kann bei einer rotierenden Ausführung der erfindungsgemäßen Vorrichtung die Welle an jeder Position gelagert werden, da keine transversalen oder longitudinalen Furthermore, the invention provides that the ultrasonic applicator is mounted on a carrier connected to the shaft. As a result, a plurality of ultrasonic applicators can be arranged on a rotatable support in order to effectively produce precise joint seams in this way. Thus, at a rotating embodiment of the device according to the invention, the shaft can be stored at any position, as no transverse or longitudinal
Schwingungen, wie von konventionellen rotierenden Schwinggebilden bekannt, auf die Welle übertragen werden. Bei den bekannten rotierenden Ultraschall- Sonotroden, die im Bereich von 20 bis 40kHz arbeiten, ist das komplette Schwinggebilde, also Siegelstollen und Welle auf die Erregerfrequenz abgestimmt. Diese Ausführungsform bedeutet einen extrem hohen Vibrations, as known from conventional rotating vibrating structures, are transmitted to the shaft. In the known rotating ultrasonic sonotrodes, which operate in the range of 20 to 40 kHz, the complete oscillating structure, ie sealing tunnel and shaft is tuned to the exciter frequency. This embodiment means extremely high
Fertigungsaufwand und Fertigungszeit, da in bestimmten Fertigungsschritten bis zur Fertigstellung die Resonanzfrequenz immer wieder geprüft werden muss. Diese sehr komplexe Fertigung ist äußerst kostenintensiv. Im beschriebenen Beispiel eines vierstolligen rotierenden erfindungsgemäßen Ultraschallapplikators wird die Funktion der schallerzeugenden Baugruppen nicht von dem Production costs and production time, as the resonance frequency has to be checked again and again in certain production steps until completion. This very complex production is extremely expensive. In the example described of a four-speed rotating ultrasonic applicator according to the invention, the function of the sound-generating assemblies is not of the
Wellenkörper beeinflusst. Dadurch kann die Siegelfläche unabhängig von der Wellenlänge optimal dem Produkt angepasst werden. Shaft body influenced. As a result, the sealing surface can be optimally adapted to the product, regardless of the wavelength.
In besonders günstiger Weise ist ein um eine Achse drehbar gelagerter, mit zumindest einem Messer versehener Gegenhalter vorgesehen, wobei die Achse parallel zur Achse der Welle angeordnet ist. Durch den Gegenhalter ist es möglich, die Fügenaht abzustützen. Das Messer dient dazu, die einzelnen Folienbeutel zu vereinzeln. In a particularly advantageous manner, a rotatably mounted about an axis, provided with at least one knife counter-holder is provided, wherein the axis is arranged parallel to the axis of the shaft. By the counter-holder, it is possible to support the joint seam. The knife serves to separate the individual foil bags.
Besonders günstig ist es, wenn das Messer in den Gegenhalter integriert ist. Dies ermöglicht einen kompakten Aufbau der Vorrichtung und stellt einen It is particularly favorable when the knife is integrated in the anvil. This allows a compact construction of the device and provides a
zuverlässigen Trennvorgang sicher. reliable separation process safely.
Besonders günstig ist es, wenn das Messer benachbart zu dem Gegenhalter angeordnet ist. Dies trägt insbesondere dazu bei, die gesamte Vorrichtung wartungsfreundlich auszubilden, da das Messer leicht getauscht werden kann. Weiterhin ist in bevorzugter Ausgestaltung der Erfindung vorgesehen, dass beidseitig der Quernaht zur Ausbildung einer Kopfnaht-Quernaht und einer Fußnaht-Quernaht jeweils ein Ultraschallapplikator vorgesehen ist. Somit können die Kopfnähte und Fußnähte der Quernaht jeweils mittels eines eigenen It is particularly favorable when the knife is arranged adjacent to the counter-holder. This contributes in particular to make the entire device easy to maintain because the knife can be easily replaced. Furthermore, it is provided in a preferred embodiment of the invention that both sides of the transverse seam for forming a top seam and a seam cross-seam each have an ultrasonic applicator is provided. Thus, the head seams and foot seams of the transverse seam can each by means of a separate
Ultraschallapplikators erzeugt werden. Erfindungsgemäß ist der Ultraschallwandler bevorzugt plattenförmig ausgebildet. Dies vereinfacht die Herstellung und führt zu einer Kostensenkung und sichert im Übrigen eine zuverlässige Funktion. Um die Ultraschallwellen zu fokussieren, ist bevorzugterweise vorgesehen, dass die Fokussiereinrichtung linsenförmig ausgebildet ist. Ultrasonic applicator are generated. According to the invention, the ultrasonic transducer is preferably plate-shaped. This simplifies the production and leads to a reduction in costs and secures a reliable function by the way. In order to focus the ultrasonic waves, it is preferably provided that the focusing device is formed lens-shaped.
Weiterhin ist es günstig, wenn der Gegenhalter aus einem keramischen Material gefertigt ist. Hierdurch geben sich günstige Reibungsverhältnisse. Zudem ist das keramische Material verschleißbeständig. Furthermore, it is advantageous if the counter-holder is made of a ceramic material. This gives favorable friction conditions. In addition, the ceramic material is resistant to wear.
Kurze Beschreibung der Zeichnung Short description of the drawing
Nachfolgend werden Ausführungsbeispiele der Erfindung unter Bezugnahme auf die begleitende Zeichnung im Detail beschrieben. In der Zeichnung ist: Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings. In the drawing is:
Figur 1 eine schematische Darstellung der Funktionsweise des Figure 1 is a schematic representation of the operation of the
erfindungsgemäßen Ultraschallapplikators Figur 2 eine schematische Darstellung der Funktionsweise und Applikation des erfindungsgemäßen Verfahrens,  2 shows a schematic representation of the mode of operation and application of the method according to the invention,
Figur 3 eine vereinfachte perspektivische Detailansicht des Figure 3 is a simplified perspective detail view of
erfindungsgemäßen Ultraschallapplikators in vierfacher Anordnung an einem Träger mit zugeordneter Gegenhaltereinheit,  ultrasonic applicator according to the invention in a fourfold arrangement on a carrier with associated counter-holder unit,
Figur 4 eine schematische Darstellung der Ausbildung einer vertikalen erfindungsgemäßen Quernahtfügevorrichtung, FIG. 4 shows a schematic representation of the embodiment of a vertical cross-seam joining device according to the invention,
Figur 5 eine schematische perspektivische Ansicht eines Figure 5 is a schematic perspective view of a
erfindungsgemäßen Ultraschallapplikators mit Gegenhalter und Messer,  ultrasonic applicator according to the invention with counterholder and knife,
Figur 6 eine schematische Darstellung zweier Ultraschallapplikatoren und zweier Gegenhalter sowie eines Messers in einem weiteren Ausführungsbeispiel der Erfindung. Ausführungsformen der Erfindung Figure 6 is a schematic representation of two ultrasonic applicators and two counter-holder and a knife in a further embodiment of the invention. Embodiments of the invention
Erfindungsgemäß erfolgt auf horizontalen und vertikalen According to the invention takes place on horizontal and vertical
Schlauchbeutelmaschinen (HFFS-Maschinen und VFFS-Maschinen) das Fügen von flexiblen thermoplastischen Packstoffen mittels Ultraschall im Bereich von 0,1 MHz bis 5 MHz, bevorzugt von 0,5 MHz bis 2 MHz. Beim konventionellen Ultraschall ist, um eine Wirkung der Schwingungen auf den Packstoff zu erzielen, eine entsprechend hohe Gegenkraft notwendig, damit die Sonotrode nicht abhebt und mechanisch auf den Packstoff einwirken kann. Außerdem benötigt derTubular bag machines (HFFS machines and VFFS machines) include the ultrasound joining of flexible thermoplastic materials in the range of 0.1 MHz to 5 MHz, preferably from 0.5 MHz to 2 MHz. In conventional ultrasound, in order to achieve an effect of the vibrations on the packaging material, a correspondingly high counterforce is necessary so that the sonotrode does not lift off and can act mechanically on the packaging material. In addition, the needed
Amboss einen Energierichtungsgeber, um das Aufschmelzen der Anvil an energy director to melt the
thermoplastischen Schichten zu beschleunigen. accelerate thermoplastic layers.
Die erfindungsgemäße Fügeeinrichtung erzeugt mittels eines The joining device according to the invention generates by means of a
Ultraschallapplikators bei einer Frequenz von z.B. 1 MHz eine Amplitude von z.B. nur 1 -2 μηη am Schallleiter. Diese sehr kleine Amplitude erzeugt keine Ultrasonic applicator at a frequency of e.g. 1 MHz has an amplitude of e.g. only 1 -2 μηη on the sound conductor. This very small amplitude does not produce any
Packstoffbelastung und damit keine Packstoffbeschädigungen während des Fügevorgangs. Der Energieeintrag (Figur 1 ) in den zu fügenden Packstoff erfolgt mittels einer Erhitzung 40 im Fokusbereich des Ultraschallapplikators quasi direkt in der Fügezone und nicht wie beim Stand der Technik mittels hämmernderPackaging material load and thus no packaging material damage during the joining process. The energy input (FIG. 1) into the packaging material to be joined takes place by means of heating 40 in the focal region of the ultrasound applicator virtually directly in the joining zone and not by means of hammering as in the prior art
Bewegungen der Sonotrode in Richtung Packstoff 41. Movements of the sonotrode towards packaging material 41.
Die Funktionsweise und Applikation der erfindungsgemäßen Fügeeinrichtung für die Längs-und Quernaht auf einer HFFS-Maschine ist in Figur 2 dargestellt. Von einer Packstoffrolle 1 wird eine Packstoffbahn 2 über eine Leitwalze 3 geführt und über einen Formschuh 4 zu einem Packstoffschlauch 8 geformt. Danach wird mit einer Längssiegeleinrichtung 6 eine Finn- oder Überlappnaht gefügt. Die Produkte 5 werden, nach dem diese von der Packgutkette dem The operation and application of the joining device according to the invention for the longitudinal and transverse seam on a HFFS machine is shown in FIG. From a packaging material roll 1, a packaging material web 2 is guided over a guide roll 3 and formed via a forming shoe 4 into a packaging material tube 8. Thereafter, a Finn or lap seam is joined with a longitudinal seal 6. The products are 5, after which these of the product chain the
Packstoffschlauch 8 zugeführt worden sind, mittels Reibung zwischen Produkt und Packstoff bis zur Quersiegelung 7 mit Trennfunktion weitertransportiert. DiePackstoffschlauch 8 have been supplied, further transported by friction between the product and packaging material to the transverse seal 7 with separation function. The
Quersiegelvorrichtung 7 fügt die zwei Quersiegelnähte des Schlauchbeutels und führt zwischen den Siegelungen auch die Vereinzelungsfunktion 9 mittels Trennen durch. Der erfindungsgemäße Ultraschallapplikator kann direkt an der Fügestelle befestigt werden, jedoch sind auch beliebige andere Befestigungsmöglichkeiten am Schallleiter möglich. Ein Amboss mit Energierichtungsgeber ist für die Ausbildung der Fügenaht nicht erforderlich, da das Aufschmelzen der Siegelschichten an der Verbindungsstelle hauptsächlich im Bereich der linienförmigen Fokusregion erfolgt. Cross-sealing device 7 adds the two transverse sealing seams of the tubular bag and performs between the seals and the separating function 9 by means of separation. The ultrasonic applicator according to the invention can be attached directly to the joint, but any other mounting options on the sound conductor are possible. An anvil with energy directors is not required for the formation of the joint seam, since the melting of the sealing layers takes place at the connection point mainly in the region of the linear focus region.
In Figur 3 ist die Siegeleinrichtung für die Quernähte im Detail dargestellt. Eine hochpräzise Einstellung des Siegelspaltes, wie vom konventionellen Ultraschall bekannt, ist bei diesem Verfahren nicht nötig, da lediglich eine Ankopplung des Schallleiters an den Packstoff gegeben sein muss. Das Einstellverfahren ist ähnlich einfach wie das der Heisssiegeltechnik. In Figure 3, the sealing device for the transverse seams is shown in detail. A high-precision setting of the sealing gap, as known from conventional ultrasound, is not necessary in this method, since only a coupling of the sound conductor must be given to the packaging material. The setting method is similar to that of the heat sealing technique.
In der gezeigten Ausführungsvariante der erfindungsgemäßen In the embodiment of the invention shown
Quersiegelvorrichtung 7 sind vier Siegelstollen in Form von keilförmigen Cross-sealing device 7 are four sealing lugs in the form of wedge-shaped
Schallleitern 13c auf einer um eine Achse 13e drehbaren Grundwelle 13d vorgesehen. Die Ausführungsvarianten können von einem bis acht Siegelstollen variieren und im Gegensatz zur rotativen Ultraschall-Sonotrode gemäß dem Stand der Technik auch eine ungerade Anzahl von Schallleitern aufweisen. Eine Befestigung 13 der Fokussiereinrichtung 13b mit der Welle 13d und dem Sound conductors 13c provided on a rotatable about an axis 13e fundamental 13d. The embodiments may vary from one to eight sealing studs and in contrast to the rotary ultrasonic sonotrode according to the prior art also have an odd number of sound conductors. An attachment 13 of the focusing device 13b with the shaft 13d and the
Schallleiter 13c kann sowohl kraft-oder formschlüssiger Art sein. Die Sound conductor 13c can be both positive or positive type. The
Schwingungen im Bereich von 0, 1 MHz bis 5 MHz, bevorzugt im Bereich von 0,5 MHz bis 2 MHz, werden von einem Ultraschallwandler, beispielsweise einer Piezokeramik, 13a über eine Fokussiereinrichtung 13b mittels eines Schallleiters 13c in eine Wärmelinie gewandelt. Diese Wärmelinie erzeugt den für den Siegelvorgang notwendigen Temperatureintrag in die Fügematerialien. Mit Hilfe eines um eine Achse 13f drehbaren Gegenrades 14 (rotative Oscillations in the range of 0.1 MHz to 5 MHz, preferably in the range of 0.5 MHz to 2 MHz, are converted by an ultrasonic transducer, for example a piezoceramic, 13a via a focusing 13b by means of a sound conductor 13c in a heat line. This heat line generates the necessary for the sealing process temperature entry in the joining materials. With the aid of a counter-wheel 14 rotatable about an axis 13f (rotative
Gegenhaltereinrichtung) wird der für den Fügevorgang notwendige Fügedruck aufgebracht und gleichzeitig die für den Trennvorgang entsprechende Quetsch oder Schneidkraft erzeugt. Counterhold device), the joining pressure necessary for the joining process is applied and at the same time the pinch or cutting force corresponding to the cutting process is generated.
Ein Packstoffschlauch mit Produkt 8 wird der synchron um eine Achse 13f rotierenden Applikator- und Gegenhaltereinheit 14 zugeführt. Zuerst wird die Kopfnaht des voreilenden Schlauchbeutels 9 gebildet. Danach erfolgt die Trennfunktion und im weiteren Abrollen der Siegelstollen wird die Fußnaht des nacheilenden Schlauchbeutels (9) gebildet. A packaging material tube with product 8 is fed to the applicator and counter-holder unit 14 rotating synchronously about an axis 13f. First, the top seam of the leading tubular bag 9 is formed. Then the Separation function and further unwinding of the sealing lugs, the foot seam of the trailing tubular bag (9) is formed.
Ein wesentlicher Vorteil dieser Ausführungsform ist die geringe A significant advantage of this embodiment is the low
Schwingungsbelastung der Antriebswelle 13d. Dadurch kann die Lagerung direkt in den Lagerschilden (nicht dargestellt) erfolgen. Eine Schwingungsentkopplung mittels Hülsen, die in den Schwingungsknoten der Welle befestigt sind, ist nicht notwendig. Die Lagerung kann auf jeder gewünschten Position der Welle erfolgen. Vibration load of the drive shaft 13d. This allows the storage directly in the end shields (not shown). A vibration decoupling by means of sleeves which are fixed in the nodes of the wave is not necessary. The storage can be done at any desired position of the shaft.
Bei VFFS-Maschinen wird, wie in Figur 4 gezeigt, eine Packstoffbahn ebenfalls mittels einer Formschulter 101 zu einem Folienschlauch 102 geformt. Eine erfindungsgemäße nachfolgende Längssiegelvorrichtung 103 fügt eine Überlappoder Finnnaht. In VFFS machines, as shown in FIG. 4, a packaging material web is also formed into a film tube 102 by means of a forming shoulder 101. A subsequent longitudinal sealing device 103 according to the invention adds an overlap or a Finn seam.
Ein Schallleiter 103, welcher für den Wärmeeintrag zuständig ist, befindet sich unmittelbar unterhalb der Formschulter 101 , wo die Folie zu einem Schlauch 102 geformt wird. Dieser sehr einfache Aufbau kann auf jeder A sound conductor 103, which is responsible for the heat input, is located immediately below the forming shoulder 101, where the film is formed into a tube 102. This very simple design can work on everyone
Schlauchbeutelmaschine erfolgen, egal ob intermittierendes oder kontinuierliches Funktionsprinzip. Für eine optimale Siegelnahtausbildung, d.h. mit höheren Siegelnahtfestigkeiten kann an einem Gegenhalter 104 ein Element zur Flow wrapping machine, regardless of whether intermittent or continuous operating principle. For optimum seal formation, i. with higher sealing seam strengths can on an anvil 104 an element for
Verteilung der Siegelschmelze vorgesehen werden. Distribution of the sealing melt are provided.
Mit dieser Vorrichtung wird ein laminares Verteilen des flüssigen Siegelmediums in der Siegelzone erreicht. Die partiell verflüssigte Siegelschicht wird nicht durch die beim konventionellen Ultraschall verfahrensmäßig bedingten hämmernden Bewegungen verdrängt, sondern verbleibt bis zum Erstarren in der Siegelzone und erhöht somit signifikant die Siegelnahtfestigkeit. With this device, a laminar distribution of the liquid sealing medium in the sealing zone is achieved. The partially liquefied sealing layer is not displaced by the conventional ultrasound-related hammering movements, but remains until solidification in the sealing zone and thus significantly increases the seal seam strength.
Infolge der Schwerkraft werden die Produkte in den vorgeformten Due to gravity, the products are preformed in the
Packstoffschlauch zugeführt, welcher durch die Quersiegelwerkzeuge 104,105 der erfindungsgemäßen Siegeleinheit mit einer Quernaht/ Fußnaht 1 10/1 1 1 verschlossen ist. Nach dem Füllvorgang wird der Schlauchbeutel 106 oben mit einer Quernaht/ Kopfnaht 1 10/1 1 1 verschlossen und anschließend durch Trennen vereinzelt. Die in Figur 5 dargestellte erfindungsgemäße Siegelvorrichtung besteht aus einem Ultraschallwandler 37 mit einer Fokussiereinnchtung 38 und einem Supplied packaging tube, which is closed by the transverse sealing tools 104,105 of the sealing unit according to the invention with a transverse seam / Fußnaht 1 10/1 1 1. After the filling process, the tubular bag 106 is closed at the top with a transverse seam / top seam 1 10/1 1 1 and then separated by separation. The sealing device according to the invention shown in Figure 5 consists of an ultrasonic transducer 37 with a Fokussieinnchtung 38 and a
Schallleiter 39. Eine Arbeitsfläche 42 ist in der Gestaltung der Siegelnahtlänge 45 (siehe Figur 1 ) unabhängig von der Wellenlänge der Systemfrequenz wie beim konventionellen Ultraschall und es kann somit ein beliebig großer Sound conductor 39. A working surface 42 is in the design of the sealed seam length 45 (see Figure 1) regardless of the wavelength of the system frequency as in conventional ultrasound and thus it can be an arbitrarily large
Formatbereich bearbeitet werden. Format area are edited.
Der Gegenhalter 44 ist mit einem Messer für die Schneidfunktion versehen, mittels welchem die Schlauchbeutel vereinzelt werden. The counter-holder 44 is provided with a knife for the cutting function, by means of which the tubular bags are separated.
Die erfindungsgemäße Siegelvorrichtung kann sehr kompakt gestaltet werden, da weder ein Konverter noch ein Booster für die Funktion notwendig sind. The sealing device according to the invention can be made very compact, since neither a converter nor a booster for the function are necessary.
Die Massereduzierung in Verbindung mit der kompakten Bauweise wirkt sich sehr positiv auf die Dynamik des sich in einer Box-Motion-Bewegung arbeitenden Backenstuhles der Schlauchbeutelmaschine aus. Somit kann die Ausbringung der Schlauchbeutelmaschine erhöht werden. The mass reduction in combination with the compact design has a very positive effect on the dynamics of the box-type machine, which operates in a box-motion motion. Thus, the output of the tubular bag machine can be increased.
Weitere Ausführungsformen sind in Figur 6 dargestellt. Hier ist für jede der zwei Quernähte 1 10, 1 1 1 gemäß Figur 4 am Schlauchbeutel 106 ein Further embodiments are shown in FIG. Here is for each of the two transverse seams 1 10, 1 1 1 according to Figure 4 on the tubular bag 106 a
erfindungsgemäßes Sealingsystem vorgesehen. Dadurch kann die Siegelung der Fußnaht 1 1 1 vom oberen und die Kopfnaht 1 10 vom unteren Schlauchbeutel 47 zeitgleich oder zeitversetzt erfolgen. In der Figur 6 zeigt das Bezugszeichen 46 eine obere Verpackung, während das Bezugszeichen 47 eine untere Verpackung zeigt. Das Schneidmesser 43 ist separat von den Gegenhaltern 44 angeordnet. Der Ultraschallapplikator ist analog dem Ausführungsbeispiel der Figur 5 aufgebaut und umfasst einen Ultraschallwandler 37, eine Fokussiereinnchtung 38 und einen Schallleiter 39. In dem Schallleiter 39 sind vereinfacht die sich ausbreitenden Wellen dargestellt. provided according to the invention sealing system. As a result, the sealing of the Fußnaht 1 1 1 from the top and the top seam 1 10 made from the lower tubular bag 47 at the same time or with a time delay. In Fig. 6, reference numeral 46 shows an upper package, while reference numeral 47 shows a lower package. The cutting blade 43 is arranged separately from the counter-holders 44. The ultrasound applicator is constructed analogously to the exemplary embodiment of FIG. 5 and comprises an ultrasound transducer 37, a focusing device 38 and a sound conductor 39. In simplified form, the propagating waves are shown in the sound conductor 39.

Claims

Ansprüche claims
1 . Quernahtfügevorrichtung für eine flexible Verpackung mit zumindest einem Ultraschallapplikator (13a - 13c), welcher an einer Welle (13d) gelagert und um eine längs der Quernaht (1 10, 1 1 1 ) angeordnete Achse (13e) der Welle (13d) drehbar ist, dadurch gekennzeichnet, dass der Ultraschallapplikator (13a - 13c) zur Erzeugung und Bündelung von Ultraschall in einem 1 . Cross-seam joining device for flexible packaging with at least one ultrasonic applicator (13a-13c) which is mounted on a shaft (13d) and rotatable about an axis (13e) of the shaft (13d) arranged along the transverse seam (110, 11), characterized in that the ultrasonic applicator (13a - 13c) for generating and bundling ultrasound in a
Frequenzbereich von 0,1 MHz bis 5 MHz, bevorzugt von 0,5 MHz bis 2 MHz, ausgebildet ist.  Frequency range of 0.1 MHz to 5 MHz, preferably from 0.5 MHz to 2 MHz is formed.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass der 2. Apparatus according to claim 1, characterized in that the
Ultraschallapplikator(13a - 13c) einen Ultraschallwandler(37), eine  Ultrasonic applicator (13a - 13c) an ultrasonic transducer (37), a
Fokussiereinrichtung (38) und einen Schallleiter (39) umfasst.  Focusing device (38) and a sound conductor (39).
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Ultraschallapplikator angrenzend an den Ultraschallwandler(13a) an einem mittels der Welle (13d) verbundenen Träger (13) gelagert ist. 3. Apparatus according to claim 1 or 2, characterized in that the ultrasonic applicator is mounted adjacent to the ultrasonic transducer (13a) on a by means of the shaft (13d) connected to the carrier (13).
4. Vorrichtung nach einem der Ansprüche 1 bis 3, gekennzeichnet durch einen drehbar um eine Achse (13f), welche parallel zur Achse (13e) der Welle (13d) angeordnet ist, gelagerten, mit zumindest einem Messer (43) versehenen Gegenhalter (14). 4. Device according to one of claims 1 to 3, characterized by a rotatable about an axis (13f), which is arranged parallel to the axis (13e) of the shaft (13d), mounted, with at least one knife (43) provided counter-holder (14 ).
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das Messer (43) an dem Gegenhalter (14) integriert ist. 5. Apparatus according to claim 4, characterized in that the knife (43) on the counter-holder (14) is integrated.
6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das Messer (43) benachbart zu dem Gegenhalter (14) angeordnet ist. 6. Apparatus according to claim 4, characterized in that the knife (43) adjacent to the anvil (14) is arranged.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass beidseitig der Quernaht zur Ausbildung einer Kopfnaht-Quernaht7. Device according to one of claims 1 to 6, characterized in that on both sides of the transverse seam to form a top seam transverse seam
(1 10) und einer Fußnaht-Quernaht (1 1 1 ) jeweils ein Ultraschallapplikator angeordnet ist. (1 10) and a Fußnaht-transverse seam (1 1 1) each have an ultrasonic applicator is arranged.
8. Vorrichtung nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass der Ultraschallwandler (37) plattenförmig ausgebildet ist. 8. Device according to one of claims 2 to 7, characterized in that the ultrasonic transducer (37) is plate-shaped.
9. Vorrichtung nach einem der Ansprüche 2 bis 8, dadurch gekennzeichnet, dass die Fokussiereinrichtung (38) linsenförmig ausgebildet ist. 9. Device according to one of claims 2 to 8, characterized in that the focusing device (38) is formed lens-shaped.
10. Vorrichtung nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, dass der Gegenhalter (14) aus einem keramischen Material gefertigt ist. 10. Device according to one of claims 4 to 9, characterized in that the counter-holder (14) is made of a ceramic material.
EP14708053.5A 2013-06-28 2014-03-06 Cross seam joining device for joining a sealing seam for a flexible packaging Withdrawn EP3013560A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013212715.4A DE102013212715A1 (en) 2013-06-28 2013-06-28 Cross-seam joining device for joining a sealed seam for flexible packaging
PCT/EP2014/054336 WO2014206580A1 (en) 2013-06-28 2014-03-06 Cross seam joining device for joining a sealing seam for a flexible packaging

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EP3013560A1 true EP3013560A1 (en) 2016-05-04

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EP (1) EP3013560A1 (en)
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WO (1) WO2014206580A1 (en)

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US20160368205A1 (en) 2016-12-22
WO2014206580A1 (en) 2014-12-31
US9993970B2 (en) 2018-06-12
DE102013212715A1 (en) 2014-12-31

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