WO1996035615A1 - Vorrichtung zum verbinden zweier packstoffbahnen - Google Patents

Vorrichtung zum verbinden zweier packstoffbahnen Download PDF

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Publication number
WO1996035615A1
WO1996035615A1 PCT/DE1996/000724 DE9600724W WO9635615A1 WO 1996035615 A1 WO1996035615 A1 WO 1996035615A1 DE 9600724 W DE9600724 W DE 9600724W WO 9635615 A1 WO9635615 A1 WO 9635615A1
Authority
WO
WIPO (PCT)
Prior art keywords
packaging material
material web
roller
heating
preheating device
Prior art date
Application number
PCT/DE1996/000724
Other languages
English (en)
French (fr)
Inventor
Horst Scheifele
Eberhard Krieger
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
Priority to US08/765,698 priority Critical patent/US5806277A/en
Priority to JP8533655A priority patent/JPH10503154A/ja
Priority to EP96911922A priority patent/EP0770018A1/de
Publication of WO1996035615A1 publication Critical patent/WO1996035615A1/de

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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1432—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface direct heating of the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1464—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—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
    • 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
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • 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
    • 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
    • B29C66/8141—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
    • B29C66/81431—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 cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • 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
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/87—Auxiliary operations or devices
    • B29C66/874—Safety measures or devices
    • B29C66/8744—Preventing overheating of the parts to be joined, e.g. if the machine stops or slows down
    • B29C66/87443—Preventing overheating of the parts to be joined, e.g. if the machine stops or slows down by withdrawing the heating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91431—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being kept constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B29C66/91643—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile
    • B29C66/91645—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile by steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B65B51/16—Applying or generating heat or pressure or combinations thereof by rotary members
    • 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
    • B65B9/045—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material for single articles, e.g. tablets
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/81421—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
    • B29C66/81423—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 concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • B29C66/91423—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools using joining tools having different temperature zones or using several joining tools with different temperatures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
    • B29K2305/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7162—Boxes, cartons, cases
    • B29L2031/7164—Blister packages
    • 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
    • B65B2051/105—Heat seal temperature control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1741—Progressive continuous bonding press [e.g., roll couples]

Definitions

  • the invention is based on a device for connecting two packaging material webs according to the preamble of claim 1, as has become known for example from EP 0 432 126 AI.
  • a device for connecting two packaging material webs according to the preamble of claim 1 is used in particular for sealing a plastic web consisting of thermoplastic material and provided with cups for tablets, dragées or the like with a cover film.
  • the two film webs to be sealed are preheated by means of a heating blower, which acts on the inlet area between the heating and sealing rollers.
  • cover films that are difficult to process.
  • Difficult to process cover films are, for example, to be understood as cover films that are particularly easy to recycle, or those that have special functional properties. This applies in particular to so-called “peel-off" cover foils, which on the one hand are intended to provide a tight connection to the plastic sheet and on the other hand allow simple manual peeling of the cover sheet from the plastic sheet.
  • the device according to the invention for connecting two packaging material webs with the characterizing features of claims 1 or 5 has the advantage that even difficult to process cover sheet materials can be processed safely and reliably, so that always tight sealing with the plastic bottom web.
  • FIG. 2 shows a modified exemplary embodiment according to FIG. 1 also in longitudinal section.
  • a device 10 for connecting two packaging material webs 11, 12 has a heating roller 15 which can be pivoted about an axis 13 and a driven sealing roller 16 which interacts with the heating roller 15.
  • the two are referred to as base foil 11 and cover foil 12 Packing material webs under the influence of heat and Pressure connected or welded together in a manner known per se.
  • Station cups 18 are molded in, which were then filled at a second station, for example with tablets.
  • the sealing roller 16 has recesses 19 adapted to the cups 18 on its circumference.
  • the cover film 12 consists, for example, of aluminum or of a plastic material, for example polypropylene.
  • a preheating device 20 which interacts with the heating roller 15 is used to heat the cover film 12 to the required sealing temperature
  • Preheating device 20 has two heating plates 24, 25 arranged at a short distance in register with the underside or top side 22 and 23 of the cover film 12.
  • the heating plate 25 acting on the top side 23 is advantageously connected to the heating roller 15 for pivoting away about the axis 13.
  • the pivoted away position of the heating roller 15 and the heating plate 25 is shown in dash-dot lines in FIG.
  • the end face 27 of the heating plate 25 facing the heating plate 25 of the heating roller 15 is adapted in a form-fitting manner so that there is almost no gap between the heating plate 25 and the heating roller 15.
  • the heating plate 24 facing the underside 22 of the cover film 12 extends approximately to the height at which the cover film 12 bears against the heating roller 15.
  • a separately heated heating wedge 30 designed as a preheating element, which extends almost into the contact area 17 of the two rollers 15, 16.
  • the heating wedge 30, which has approximately the same thickness as the heating plate 24, is connected to the heating plate 24.
  • the heating plate 24 and heating wedge 30 can be moved away from the heating or sealing roller 15 or 16 together, so that there is such a large distance from the base or cover foil 11 or 12 that they are no longer heated.
  • the pivoted-away position of the heating plate 24 and the heating wedge 30 is shown in dash-dot lines in FIG.
  • the heating surfaces 32, 33 of the heating wedge 30 facing the top or bottom film 12 or 11 are non-stick coated and each have a convex shape corresponding to the shape of the heating and sealing rollers 15 and 16, so that the top or bottom film 12 or 11 sets a constant distance, this distance being greater than the distance between the heating plate 24 and the underside 22 of the cover film 12.
  • the heating wedge 30a shown in broken lines is extended parallel to the upper side 34 of the base film 11 in a modified form.
  • the device 10 described above for connecting two packaging material webs 11, 12 functions as follows:
  • the heaters of the heating roller 15 and the heating plates 24, 25 and the heating wedge 30 and 30a can be regulated separately from one another.
  • the heating wedge 30 or 30a is usually adjusted to the highest temperature, which can be close to or even higher than the melting point of the cover film 12.
  • the distance of the heating wedge 30 or 30a from the cover sheet 12 ensures that the cover sheet 12 cannot reach this temperature.
  • the two heating plates 24, 25 serving as preheating have the lowest temperature.
  • the sealing roller 16 is preferably used to connect the two packaging material webs 11, 12 continuously driven, the feed of the bottom film 11 being effected by the positive engagement of the cups 18 in the recesses 19 of the sealing roller 16.
  • the cover film 12 preheated by the two heating plates 24, 25 and the heating wedge 30 or 30a is then sealed in the region 17 by the heating roller 15 by heat and pressure with its underside 22 onto the top of the bottom film 11.
  • the heating wedge 30 or 30a ensures that the underside 22 of the cover film 12, viewed in the conveying direction, can be heated with increasing intensity toward the heating roller 15, so that particularly good sealing can be achieved.
  • the bottom film 11 is also preheated, so that there is an optimal connection of the two packaging material webs 11, 12, the
  • Thermal stresses between the bottom film 11 and the cover film 12 can be kept low.
  • the preheating device 20 is dispensed with.
  • the sealing roller 16a is designed to be heatable.
  • the temperature can thus be adapted to the material of the base film 11 and the filling material, so that damage to the base film 11 or the filling material is avoided.
  • an additional deflection roller 35 is coupled to the heating roller 15. The wrap angle ⁇ of the cover sheet 12 with the heating roller 15 can be changed via the position of the deflection roller 35 relative to the heating roller 15.
  • the heating roller 15 can be at a predetermined temperature correspondingly larger wrap angle ⁇ transfer a particularly large amount of thermal energy into the cover film web 12.
  • the heating roller 15 has a predetermined, constantly set temperature. A corresponding choice of the wrap angle ⁇ then ensures that the required thermal energy is transferred to the cover film web 12.
  • the device according to the first exemplary embodiment it is noted that it is of course also possible to also equip the device according to the first exemplary embodiment with a heatable sealing roller 16.
  • the advantages of both exemplary embodiments can thus be combined with one another.
  • the use of the device 10 is not only limited to the blister webs described in the exemplary embodiment, but is basically transferable to two packaging material webs to be connected to one another.

Abstract

Eine Vorrichtung (10) zum Verbinden einer Bodenfolie (11) mit einer Deckfolie (12) hat eine Heizwalze (15) und eine mit ihr zusammenwirkende Siegelwalze (16, 16a). Im Einlaufbereich der Heizwalze (15) ist eine Vorwärmeinrichtung (20) für die Deckfolie (12) angeordnet. Um eine besonders gute Verarbeitung der Deckfolie (12) zu ermöglichen, wird vorgeschlagen, eine zusätzliche, als Heizkeil (30, 30a) ausgebildete Vorheizeinrichtung für die Deckfolie (12) in unmittelbarer Nähe der Heizwalze (15) anzuordnen. Anstelle der Vorwärmeinrichtung (20) kann auch die Siegelwalze (16, 16a) beheizbar ausgebildet sein.

Description

Vorrichtung zum Verbinden zweip.r Packstoffbahnen
Stand der Technik
Die Erfindung geht aus von einer Vorrichtung zum Verbinden zweier Packstoffbahnen nach der Gattung des Anspruchs 1, wie sie beispielsweise aus der EP 0 432 126 AI bekannt geworden ist. Eine derartige Vorrichtung wird insbesondere zum Versiegeln einer aus thermoplastischem Material bestehenden, und mit Näpfen für Tabletten, Dragees oder ähnlichem versehenen Kunststoffbahn mit einer Deckfolie verwendet. Bei der bekannten Vorrichtung werden die beiden zu versiegelnden Folienbahnen mittels eines Heizgebläses, das auf den Einlaufbereich zwischen Heiz- und Siegelwalze einwirkt, vorgewärmt.
In der Praxis hat es sich gezeigt, daß derartige Vorwärmeinrichtungen unter Umständen nicht zufriedenstellend arbeiten, d.h. daß eine dichte Siegelung nicht gewährleistet ist. Dies trifft insbesondere bei schwierig zu verarbeitenden Deckfolien zu. Unter schwierig zu verarbeitenden Deckfolien sind beispielsweise besonders gut wiederverwertbare Deckfolien zu verstehen, oder solche, die besondere funktioneile Eigenschaften besitzen. Das betrifft insbesondere sog. "Peel-Off"-Deckfolien, die einerseits eine dichte Verbindung zur Kunststoffbahn, und andererseits ein einfaches manuelles Abschälen der Deckfolie von der Kunststoffbahn ermöglichen sollen. Vorteile der Erfindung
Die erfindungsgemäße Vorrichtung zum Verbinden zweier Packstoffbahnen mit den kennzeichnenden Merkmalen der Ansprüche 1 oder 5 hat demgegenüber den Vorteil, daß auch schwierig zu verarbeitende Deckfolienmaterialien sicher und zuverlässig verarbeitet werden können, so daß stets dichte Siegeltingen mit der Kunststoffunterbahn entstehen.
Weitere Vorteile und vorteilhafte Weiterbildungen der erfindungsgemäßen Vorrichtung zum Verbinden zweier Packstoffbahnen ergeben sich aus den Unteransprüchen und der Beschreibung.
Zeichnung
Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden in der nachfolgenden Beschreibung näher erläutert. Es zeigen die Figur 1 eine
Vorrichtung zum Verbinden zweier Packstoffbahnen vereinfacht im Längsschnitt während zweier Betriebsphasen, und die Figur 2 ein abgewandeltes Ausführungsbeispiel nach Figur 1 ebenfalls im Längsschnitt.
Beschreibung der Ausführungsbeispiele
Eine Vorrichtung 10 zum Verbinden zweier Packstoffbahnen 11, 12 hat eine um eine Achse 13 schwenkbare Heizwalze 15 und eine mit der Heizwalze 15 zusammenwirkende, angetriebene Siegelwalze 16. Im Berührungsbereich 17 der beiden Walzen 15, 16 werden die beiden als Bodenfolie 11 und Deckfolie 12 bezeichnenden Packstoffbahnen unter Einwirkung von Wärme und Druck auf an sich bekannte Art und Weise miteinander verbunden bzw. verschweißt.
In die aus thermoplastischem Material bestehende Bodenfolie 11 wurden an einer vorhergehenden, nicht dargestellten ersten
Station Näpfe 18 eingeformt, die anschließend an einer zweiten Station beispielsweise mit Tabletten befüllt wurden. Zum Transport der Bodenfolie 11 weist die Siegelwalze 16 an ihrem Umfang den Näpfen 18 angepaßte Ausnehmungen 19 auf. Die Deckfolie 12 besteht beispielsweise aus Aluminium oder aus einem Kunststoffmaterial, beispielsweise Polypropylen.
Zum Erwärmen der Deckfolie 12 auf die erforderliche Siegeltemperatur dient neben der Heizwalze 15 eine mit der Heizwalze 15 zusammenwirkende Vorwärmeinrichtung 20. Die
Vorwärmeinrichtung 20 hat zwei in Deckung mit der Unter- bzw. Oberseite 22 und 23 der Deckfolie 12 in geringem Abstand angeordnete Heizplatten 24, 25. Die auf die Oberseite 23 einwirkende Heizplatte 25 ist vorteilhafterweise zum Wegschwenken um die Achse 13 mit der Heizwalze 15 verbunden. Die weggeschwenkte Position der Heizwalze 15 und der Heizplatte 25 ist in der Figur 1 strichpunktiert eingezeichnet. Um eine möglichst gleichmäßige Erwärmung der Oberseite 23 der Deckfolie 12 zu erzielen, ist die der Heizwalze 15 zugewandte Stirnfläche 27 der Heizplatte 25 der Heizwalze 15 formschlüssig angepaßt, so daß zwischen der Heizplatte 25 und der Heizwalze 15 nahezu kein Spalt vorhanden ist. Die der Unterseite 22 der Deckfolie 12 zugewandte Heizplatte 24 reicht bis etwa in die Höhe, in der die Deckfolie 12 an der Heizwalze 15 anliegt. An das der Siegelwalze 16 zugewandte Ende 28 der Heizplatte 24 schließt sich direkt ein als Vorheizelement ausgebildeter, separat beheizbarer Heizkeil 30 an, der nahezu bis in den Kontaktbereich 17 der beiden Walzen 15, 16 reicht. Der Heizkeil 30, der in etwa die gleiche Dicke wie die Heizplatte 24 besitzt, ist mit der Heizplatte 24 verbunden. Während Produktionspausen sind Heizplatte 24 und Heizkeil 30 gemeinsam von der Heiz- bzw. Siegelwalze 15 bzw. 16 wegfahrbar, so daß sich ein so großer Abstand zur Boden- bzw. Deckfolie 11 bzw. 12 ergibt, daß diese nicht mehr erwärmt werden. Auch hier ist die weggeschwenkte Position der Heizplatte 24 und des Heizkeils 30 in der Figur 1 strichpunktiert eingezeichnet.
Die der Deck- bzw. Bodenfolie 12 bzw. 11 zugewandten Heizflächen 32, 33 des Heizkeils 30 sind antihaftbeschichtet und entsprechend der Form der Heiz- und Siegelwalze 15 und 16 jeweils konvex ausgebildet, so daß sich zu der Deck- bzw. Bodenfolie 12 bzw. 11 ein jeweils konstanter Abstand einstellt, wobei dieser Abstand größer ist als der Abstand der Heizplatte 24 zur Unterseite 22 der Deckfolie 12.
Um auch eine großflächige Vorwärmung der Bodenfolie 11 erzielen zu können, ist bei einer abgewandelten Form der gestrichelt eingezeichnete Heizkeil 30a parallel zur Oberseite 34 der Bodenfolie 11 verlängert.
Die oben beschriebene Vorrichtung 10 zum Verbinden zweier Packstoffbahnen 11, 12 funktioniert wie folgt: Die Heizungen der Heizwalze 15 sowie der Heizplatten 24, 25 und des Heizkeils 30 bzw. 30a sind getrennt voneinander regelbar. Üblicherweise ist der Heizkeil 30 bzw. 30a dabei auf die höchste Temperatur eingeregelt, die nahe oder sogar höher als der Schmelzpunkt der Deckfolie 12 liegen kann. Durch den Abstand des Heizkeils 30 bzw. 30a von der Deckfolie 12 ist dabei gewährleistet, daß die Deckfolie 12 diese Temperatur jedoch nicht annehmen kann. Dagegen besitzen die beiden als Vorheizung dienenden Heizplatten 24, 25 die geringste Temperatur. Zum Verbinden der beiden Packstoffbahnen 11, 12 wird die Siegelwalze 16 vorzugsweise kontinuierlich angetrieben, wobei der Vorschub der Bodenfolie 11 durch das formschlüssige Anliegen der Näpfe 18 in den Ausnehmungen 19 der Siegelwalze 16 erfolgt. Die durch die beiden Heizplatten 24, 25 und den Heizkeil 30 bzw. 30a vorgewärmte Deckfolie 12 wird dann im Bereich 17 durch die Heizwalze 15 durch Wärme und Druck mit ihrer Unterseite 22 auf die Oberseite der Bodenfolie 11 aufgesiegelt. Durch den Heizkeil 30 bzw. 30a ist sichergestellt, daß die Unterseite 22 der Deckfolie 12 in Förderrichtung betrachtet mit zur Heizwalze 15 hin zunehmender Intensität erwärmt werden kann, so daß sich eine besonders gute Siegelung erzielen läßt. Insbesondere durch die Ausbildung des Heizkeils 30a mit seiner parallel zur Oberseite 34 der Bodenfolie 11 verlängerten Heizfläche 33a wird auch die Bodenfolie 11 vorgewärmt, so daß es zu einer optimalen Verbindung der beiden Packstoffbahnen 11, 12 kommt, wobei die
WärmeSpannungen zwischen der Bodenfolie 11 und der Deckfolie 12 gering gehalten werden können.
Bei dem Ausführungsbeispiel nach der Figur 2 wird auf die Vorwärmeinrichtung 20 verzichtet. Statt dessen ist nicht nur die Heizwalze 15, sondern auch die Siegelwalze 16a beheizbar ausgebildet. Damit kann die Temperatur dem Material der Bodenfolie 11 und dem Füllgut angepasst werden, so daß Beschädigungen der Bodenfolie 11 bzw. des Füllguts vermieden werden. Mit der beheizten Siegelwalze 16a ist es möglich, zusätzlich Wärmeenergie auf die Bodenfolie 11 zu übertragen, was zu einer besseren Siegelung beiträgt. Zusätzlich ist mit der Heizwalze 15 eine zusätzliche Umlenkwalze 35 gekoppelt. Über die Lage der Umlenkwalze 35 zur Heizwalze 15 läßt sich der Umschlingungswinkel α der Deckfolie 12 mit der Heizwalze 15 verändern. Je größer der Umschlingungswinkel α, desto niedriger kann die Temperatur der Heizwalze 15 eingestellt sein, um eine bestimmte Wärmemenge an die Deckfolie 12 abzugeben. Andererseits läßt sich bei einer vorgegebenen Temperatur der Heizwalze 15 bei entsprechend größerem Umschlingungswinkel α besonders viel Wärmeenergie in die Deckfolienbahn 12 übertragen. In der Praxis weist die Heizwalze 15 eine vorgegebene, konstant eingestellte Temperatur auf. Durch eine entsprechende Wahl des Umschlingungswinkels α wird dann sichergestellt, daß die benötigte Wärmeenergie in die Deckfolienbahn 12 übertragen wird.
Ergänzend wird bemerkt, daß es selbstverständlich auch möglich ist, die Vorrichtung gemäß des ersten Ausführungsbeispiels ebenfalls mit einer beheizbaren Siegelwalze 16 auszustatten. Damit lassen sich die Vorteile beider Ausführungsbeispiele miteinander verbinden. Außerdem ist es möglich, bei entsprechendem Material der Bodenfolie 11 auf eine Antihaftbeschichtung der Heizflächen 33, 33a des Heizkeils 30 bzw. 30a zu verzichten. Weiterhin wird darauf hingewiesen, daß die Anwendung der Vorrichtung 10 nicht nur auf die im Ausführungsbeispiel beschriebenen Blisterbahnen beschränkt ist, sondern grundsätzlich auf zwei miteinander zu verbindende Packstoffbahnen übertragbar ist.

Claims

Ansprüche
1. Vorrichtung (10) zum Aufsiegeln einer ersten Packstoffbahn (12) auf eine zweite Packstoffbahn (11) unter Einwirkung von Wärme und Druck, mit einer auf die erste Packstoffbahn (12) einwirkenden Heizwalze (15), einer mit der Heizwalze (15) zusammenwirkenden Siegelwalze (16) , sowie einer auf den Kontaktbereich (17) der beiden Walzen (15, 16) einwirkenden ersten Vorheizeinrichtung (30, 30a), dadurch gekennzeichnet, daß eine der ersten Packstoffbahn (12) zugeordnete zweite Vorheizeinrichtung (20) vorgesehen ist, und daß die Temperatur der ersten Vorheizeinrichtung (30, 30a) und der zweiten Vorheizeinrichtung (20) getrennt voneinander regelbar sind.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die erste Vorheizeinrichtung (30, 30a) im Bereich der Oberseite (34) der zweiten Packstoffbahn (11) verlängert ausgebildet ist.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die der Unterseite (22) der ersten Packstoffbahn (12) zugewandte Fläche (32) der ersten Vorheizeinrichtung (30, 30a) einen größeren Abstand zur
Unterseite (22) der ersten Packstoffbahn (12) aufweist, als die entsprechende Fläche der zweiten Vorheizeinrichtung (20).
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die erste Vorheizeinrichtung (30, 30a) zusammen mit einem Teil (24) der zweiten Vorheizeinrichtung (20) von den beiden Packstoffbahnen (11, 12) wegschwenkbar ausgebildet ist.
5. Vorrichtung (10) zum Aufsiegeln einer ersten Packstoffbahn (12) auf eine zweite Packstoffbahn (11) unter Einwirkung von Wärme und Druck, mit einer auf die erste
Packstoffbahn (12) einwirkenden Heizwalze (15) , einer mit der Heizwalze (15) zusammenwirkenden Siegelwalze (16a) , sowie einer auf den Kontaktbereich (17) der beiden Walzen (15, 16a) einwirkenden ersten Vorheizeinrichtung (30, 30a), dadurch gekennzeichnet, daß die erste Packstoffbahn (12) über eine lageveränderliche Rolle (35) geführt ist, wobei sich entsprechend der Stellung der Rolle (35) zur Heizwalze (15) ein entsprechender Umschlingungswinkel (α) der ersten Packstoffbahn (12) mit der Heizwalze (15) einstellt.
6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Siegelwalze (16, 16a) beheizbar ausgebildet ist.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die erste Vorheizeinrichtung (30, 30a) zumindest auf der der ersten Packstoffbahn (12) zugewandten Fläche (32) eine Temperatur aufweist, die nahe oder über der Schmelztemperatur der ersten Packstoffbahn (12) liegt.
8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die erste Packstoffbahn eine Deckfolie (12) und die zweite Packstoffbahn eine mit Näpfen (19) versehene Bodenfolie (11) ist.
PCT/DE1996/000724 1995-05-13 1996-04-25 Vorrichtung zum verbinden zweier packstoffbahnen WO1996035615A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US08/765,698 US5806277A (en) 1995-05-13 1996-04-25 Apparatus for joining two strips of packaging material
JP8533655A JPH10503154A (ja) 1995-05-13 1996-04-25 ２つの包装材ウエブを接続するための装置
EP96911922A EP0770018A1 (de) 1995-05-13 1996-04-25 Vorrichtung zum verbinden zweier packstoffbahnen

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DE19517616.2 1995-05-13
DE19517616A DE19517616A1 (de) 1995-05-13 1995-05-13 Vorrichtung zum Verbinden zweier Packstoffbahnen

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US5806277A (en) 1998-09-15
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EP0770018A1 (de) 1997-05-02

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