DE10244672A1 - Ultrasound welding procedure and apparatus for two or more films uses uniform level of ultrasound radiation in lengthwise and transverse directions - Google Patents
Ultrasound welding procedure and apparatus for two or more films uses uniform level of ultrasound radiation in lengthwise and transverse directions Download PDFInfo
- Publication number
- DE10244672A1 DE10244672A1 DE10244672A DE10244672A DE10244672A1 DE 10244672 A1 DE10244672 A1 DE 10244672A1 DE 10244672 A DE10244672 A DE 10244672A DE 10244672 A DE10244672 A DE 10244672A DE 10244672 A1 DE10244672 A1 DE 10244672A1
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- Prior art keywords
- sonotrode
- anvil
- welding
- foils
- energy
- 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.)
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Classifications
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- 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
- B29C65/086—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 a rotary anvil
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- 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
- B29C65/7459—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 for continuously and longitudinally welding and severing webs
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
- B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
- B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
- B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
- B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
- B29C66/24244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle
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- 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
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- 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
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- 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
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- 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
- B29C66/81433—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 being toothed, i.e. comprising several teeth or pins, or being patterned
- B29C66/81435—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 being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/824—Actuating mechanisms
- B29C66/8246—Servomechanisms, e.g. servomotors
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- 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
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- 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
- B29C66/851—Bag or container making machines
- B29C66/8511—Bag making machines
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
- B29C66/92611—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by controlling or regulating the gap between the joining tools
- B29C66/92615—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by controlling or regulating the gap between the joining tools the gap being non-constant over time
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
- B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
- B29C66/93441—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being non-constant over time
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
- B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
- B29C66/93451—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed by controlling or regulating the rotational speed, i.e. the speed of revolution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
- B29C66/939—Measuring or controlling the joining process by measuring or controlling the speed characterised by specific speed values or ranges
- B29C66/9392—Measuring or controlling the joining process by measuring or controlling the speed characterised by specific speed values or ranges in explicit relation to another variable, e.g. speed diagrams
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- 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
- B29C65/749—Removing scrap
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- 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
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- 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
- B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
- B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y diagrams
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft das Ultraschallverschweißen von wenigstens zwei Folien, von denen wenigstens eine ein thermoplastisches Material enthält.The present invention relates to ultrasonic welding of at least two films, at least one of which is a thermoplastic Contains material.
Im weiteren Text werden die Ausdrücke "im wesentlichen longitudinal bzw. längsverlaufend" und "im wesentlichen transversal bzw. querverlaufend" systematisch durch "longitudinal bzw. längsverlaufend" und "transversal bzw. querverlaufend" ersetzt. Alle Segmente, Teile, ..., die als geradlinig beschrieben sind, sind tatsächlich als geradlinig oder leicht gekrümmt zu betrachten.In the rest of the text, the terms "become essentially longitudinal or longitudinal "and" essentially transverse or transverse "systematically through "longitudinal or longitudinal "and" transverse or transverse "replaced. All Segments, parts, ... that are described as straightforward indeed as straight or slightly curved consider.
Der Stand der Technik befaßt sich in beachtlichen Maße mit diesem Schweißverfahrenstyp, bei welchem ein im wesentlichen zylindrischer Amboß, der eine Mehrzahl von erhabenen Mustern (oder Schweißprägestempeln) trägt, vor einem Ultraschallschwinger (im folgenden Sonotrode genannt) vorbeiläuft, der sich längs einer Mantellinie des Ambosses erstreckt, wenn dieser eine zylindrische Form hat. Die Sonotrode ist etwas von dem Amboß entfernt, um das Durchlaufen wenigstens zweier Folien zwischen dem Amboß und der Sonotrode zu erlauben. Im folgenden nehmen wir das Beispiel von zwei Folien. Diese Folien, die miteinander in Kontakt stehen, werden transportiert in gleitender Auflage auf dem Amboß, wobei die Laufrichtung senkrecht zur Achse des Schwingers liegt, der etwas entfernt von den Folien angeordnet ist. Beim Vorbeilaufen kommen die Folien in Kontakt mit den Stegen des Schweißmusters. Sobald sie unter der Sonotrode vorbeilaufen, induziert die Ultraschallstrahlung Schwingungen auf molekularem Niveau in das oder die thermoplastischen Materialien, wobei eine deutliche lokale Erwärmung an der Berührungsstelle der zusammenzufügenden Teile bewirkt wird, und zwar in den Bereichen der Folien, die mit den Stegen des Schweißprägestempels in Kontakt sind. Die Folge ist, daß die Folien längs der Schweißbereiche des Schweißprägestempels des Ambosses miteinander verschweißt sind.The prior art is concerned to a considerable degree with this type of welding process, in which an essentially cylindrical anvil, the one A plurality of raised patterns (or sweat stamps) passes an ultrasonic vibrator (hereinafter referred to as sonotrode), which along extends a generatrix of the anvil if it is cylindrical Has shape. The sonotrode is slightly removed from the anvil to allow it to go through to allow at least two foils between the anvil and the sonotrode. In the following we take the example of two slides. These slides, those that are in contact with each other are transported in sliding Overlay on the anvil, the direction of travel is perpendicular to the axis of the transducer, which is located somewhat away from the foils. When walking past the foils come into contact with the bars of the welding pattern. As soon as if they pass under the sonotrode, the ultrasound radiation is induced Vibrations at the molecular level in the thermoplastic material or materials, being a significant local warming the contact point of the parts to be joined is effected, namely in the areas of the foils that with the The welding stamp in Are in contact. The result is that the Slides along the welding areas of the sweat stamp of the Anvils welded together are.
Bei der Durchführung eines dieser Verfahren unter Verwendung eines Schweißprägestempels mit einer z.B. insgesamt rechteckigen Form hat es sich jedoch herausgestellt, daß mit einer relativ geringen Leistung (im Verhältnis zu einer mittleren Leistung, die im Falle eines solchen Verschweißens verwendet wird) die längsverlaufenden Abschnitte des Rechtecks verschweißt werden können, aber nicht die querverlaufenden Seiten, wenn die Leistung der von der Sonotrode gelieferten Leistung entspricht. Man versteht unter längsverlaufenden Seiten die parallel zur Laufrichtung liegenden Seiten und unter querverlaufenden Seiten die senkrecht zur Laufrichtung liegenden Seiten. Außerdem können bei Verwendung einer relativ hohen Leistung zwar die querverlaufenden Seiten verschweißt werden, die längsverlaufenden Seiten werden aber abgeschnitten.When performing any of these procedures below Use of a welding stamp with e.g. overall rectangular shape it turned out however that with a relatively low power (relative to a medium power, the in the case of such welding is used) the longitudinal ones Sections of the rectangle can be welded, but not the transverse ones Pages if the power of the power supplied by the sonotrode equivalent. One understands longitudinally Pages the sides parallel to the direction of travel and below transverse sides that are perpendicular to the direction of travel Pages. Moreover can when using a relatively high power the transverse ones Sides welded be the longitudinal But pages are cut off.
Eine offensichtliche Idee zur Vermeidung dieses Nachteils wäre, die Leistung der Sonotrode beim Vorbeilaufen des Schweißprägestempels vor dieser zu variieren. Diese Lösung ist jedoch unrealistisch aufgrund von Schwierigkeiten bei der Ortsbestimmung; außerdem müßten die Änderungen der Leistung der Sonotrode extrem schnell erfolgen, was in Hinblick auf die energetische Trägheit einer solchen Maschine (die Folien laufen mit 200 Metern pro Minute vorbei) unmöglich ist.An obvious idea to avoid this Disadvantage would be the performance of the sonotrode when the welding stamp passes to vary before this. This solution however, is unrealistic due to location difficulties; Moreover would need the changes the performance of the sonotrode can be done extremely quickly in terms of the energetic inertia such a machine (the foils run at 200 meters per minute over) impossible is.
Die vorliegende Erfindung hat zum Ziel, eine andere Lösung zur Energiemodulation längs des Schweißprägestempels vorzuschlagen.The present invention has Aim another solution for longitudinal energy modulation of the sweat stamp propose.
Das US-Patent 3 939 033 lehrt, daß man, um ein schnelles Abnutzen der Stege eines Prägestempels zu vermeiden, der hier zum Abschneiden der zwei Folien dient und mit der Sonotrode in Kontakt steht, auf den Amboß zwei Halteflächen aufsetzen kann, die dieselbe Höhe haben wie die betrachteten Stege, wodurch das Aufschlagen der auf den Amboß schlagenden Sonotrode vermindert wird. Es wird außerdem auf den Stand der Technik bezug genommen, bei dem zwei Höhen von gleichzeitig auf der Ebene quer zur Laufachse angeordneten Stegen vereinigt sind, wobei die oberer Höhe dazu dient, die Folien zu schneiden, und die niedrigere, sie zu verschweißen.U.S. Patent 3,939,033 teaches that one has to to avoid rapid wear of the webs of a die which here used to cut off the two foils and with the sonotrode on the anvil two holding surfaces can put on the same height have like the bridges under consideration, causing the opening of the striking the anvil Sonotrode is reduced. It will also state of the art referred to at the two heights of webs arranged at the same time on the plane transverse to the barrel axis are united, the upper height being used to close the foils cut, and the lower one to weld them together.
Das französische Patent 1 591 159 lehrt, daß man zur Verringerung der zum Schweißen benötigten Energie, die (hier rechteckigen) Schweißprägestempel im Verhältnis zum Kopf der Sonotrode und zur Mantellinie des Ambosses ausrichten kann, damit kein Abschnitt des Musters parallel zum Kopf der Sonotrode angeordnet ist.French patent 1,591,159 teaches that he to reduce welding required Energy, the (here rectangular) sweat stamp in relation to the Can align the head of the sonotrode and the generatrix of the anvil, thus no section of the pattern parallel to the head of the sonotrode is arranged.
So betrifft die Erfindung der vorliegenden Anmeldung zunächst ein Verfahren zum Ultraschallschweißen von wenigstens zwei Folien, wobei man die zwei Folien und einen Amboß vor eine Sonotrode bewegt, wobei der Amboß wenigstens einen Schweißprägestempel trägt, der sich entlang einer Folge von bezogen auf die Laufrichtung der Folien im wesentlichen querverlaufenden und im wesentlichen längsverlaufenden Richtungen erstreckt, dadurch gekennzeichnet, daß man die Dichte der von den Folien längs der genannten Richtungen aufgenommenen Energie im wesentlichen aneinander angleicht.So the invention relates to the present Registration first a method for ultrasonic welding of at least two foils, moving the two foils and an anvil in front of a sonotrode, the anvil at least a sweat stamp wearing, which is along a sequence of related to the running direction of the Films essentially transverse and essentially longitudinal Directions, characterized in that the density of those of the Foils lengthways of the above-mentioned directions of the energy consumed to one another equalizes.
Die vorliegende Erfindung liefert mehrere Verfahren, um die Energie längs des Schweißprägestempels in den zur Laufrichtung querverlaufenden und den längsverlaufenden Richtungen aneinander anzugleichen bzw. zu vereinheitlichen oder quasi anzugleichen. Diese Mittel nutzen die Tatsache, daß die Dichte der von den Folien aufgenommenen Energie abhängig ist von der von der Sonotrode gelieferten Leistung, von der der Sonotrode ausgesetzten Fläche, d.h. von der Folienfläche, die mit dem Schweißprägestempel in Kontakt steht, von der Sonotrodenexpositionszeit, d.h. von der Laufgeschwindigkeit der Folien, und von dem Abstand zwischen den Stegen und dem Kopf der Sonotrode. Diese Mittel ergeben sich in keinem Fall aus direkten Interpretationen der Ausführungen der zuvor genannten beiden Patente. Tatsächlich beschreibt das Patent 3 939 033 eine Möglichkeit, die mechanischen Wechselwirkungen zwischen dem Amboß und der Sonotrode über Halteflächen zu reduzieren und die Höhe der Stege in der Ebene quer zur Laufrichtung zu verwenden, um die beiden Folien entweder zu schneiden oder zu verschweißen. Das französische Patent 1 591 159 schlägt seinerseits eine Ausrichtung der Prägestempel in Bezug auf die Sonotrode und auf den Amboß vor, um die von der Sonotrode zum Schweißen benötigte Energie zu verringern.The present invention provides several methods for equalizing or standardizing or quasi-equalizing the energy along the welding stamp in the directions transverse to the direction of travel and the longitudinal directions. These means take advantage of the fact that the density of the energy consumed by the foils depends on the power delivered by the sonotrode, on the surface exposed to the sonotrode, ie on the foil surface that is in contact with the welding die, on the sonotrode exposure time, ie on the running speed of the foils, and on the distance between the webs and the head of the sonotrode. In no case do these means result from direct interpretations of the Execution of the aforementioned two patents. In fact, patent 3,939,033 describes a way to reduce the mechanical interactions between the anvil and the sonotrode via holding surfaces and to use the height of the webs in the plane transverse to the direction of travel to either cut or weld the two foils. French patent 1,591,159, in turn, proposes alignment of the dies with respect to the sonotrode and anvil to reduce the energy required by the sonotrode for welding.
Die vorliegende Erfindung umfaßt vier in Betracht gezogene Lösungen, um die längs des Prägestempels aufgenommene Energie anzugleichen.The present invention comprises four considered solutions, around the lengthways of the die equalize absorbed energy.
Bei der ersten Ausführungsform des Verfahrens werden Energiesenken bzw. -fallen verwendet. Denn das auftretende Problem ergibt sich aus der Tatsache, daß die von der Sono trode gelieferte Energie konstant ist und die Dichte der von den in Kontakt mit den Stegen befindlichen Folien aufgenommenen Energie gleich der von der Sonotrode gelieferten Gesamtenergie E geteilt durch die Oberfläche der ausgesetzten Stege ist, wobei diese Stege alle die gleiche Höhe haben. Im Fall eines rechteckigen Prägestempels mit einer transversalen Breite l, bei dem die Seiten eine Breite e haben, ist die Dichte der von der querverlaufenden Seite aufgenommenen Energie also halb so groß wie diejenige der von den längsverlaufenden Abschnitten aufgenommenen Energie, was die zuvor gemachten Beobachtungen erklärt. Die Lösung sieht also vor, Energie außerhalb oder unmittelbar neben dem Prägestempel zu fangen bzw. aufzunehmen, um auf den querverlaufenden und längsverlaufenden Abschnitten des Prägestempels eine konstante Energiedichte zu erzielen. Dies wird dadurch erreicht, daß außerhalb oder nahe des Schweißprägestempels neue Stege auf dem Amboß hinzugefügt werden, und zwar mit derselben Höhe wie die Stege des Prägestempels, die so einen Teil der Energie zu sich hinziehen, um schließlich die Energie zu verringern, die den längsverlaufenden Abschnitten des Prägestempels zugeführt wird. Diese Energiesenken können in diesem Sinne auch als Dämpfungsglied charakterisiert werden. Üblicherweise fügt man Stege in Form von Streifen hinzu, die parallel zu den längsverlaufenden Abschnitten an jeder Seite des Prägestempels verlaufen, so daß die der Sonotrode ausgesetzte Stegoberfläche während des Vorbeilaufens immer konstant ist und zwar unabhängig davon, ob die querverlaufenden oder die längsverlaufenden Abschnitte des Schweißprägestempels vorbeilaufen.In the first embodiment The process uses energy sinks or traps. Because the problem that arises arises from the fact that the energy supplied by the sonotrode is constant and the density of the of the energy absorbed by the foils in contact with the webs equal to the total energy E delivered by the sonotrode through the surface of the exposed webs, these webs all having the same height. In the case of a rectangular stamp with a transverse width l, in which the sides have a width e is the density of that taken up by the transverse side So energy is half the size that of the longitudinal ones Sections of absorbed energy, what the previously made observations explained. The solution so envisages energy outside or immediately next to the stamp to catch or to take up on the transverse and longitudinal Sections of the die one to achieve constant energy density. This is achieved that outside or near the sweat stamp new bars are added to the anvil, at the same height as the ridges of the die, that pull some of the energy towards you, so that eventually Reduce energy, the longitudinal Sections of the die supplied becomes. These energy sinks can in this sense also as an attenuator be characterized. Usually one adds Add strips in the form of stripes that are parallel to the longitudinal ones Sections on each side of the die run so that those of the sonotrode exposed web surface while of walking past is always constant, regardless of whether the transverse or the longitudinal sections of the sweat stamp.
Man kann diese neuen Stege auch nur an einer Seite des Prägestempels anordnen, wobei man selbstverständlich deren Breite verdoppelt, um dasselbe Ergebnis zu erhalten.You can only use these new bridges on one side of the die arrange, taking for granted doubled in width to get the same result.
Man kann diese Streifen in Form von Stegen hinzufügen, die höher als diejenigen des Prägestempels sind, wobei deren Breite entsprechend verringert wird, da die Energiedichte auch vom Abstand der Stege zum Kopf der Sonotrode abhängt.You can get these strips in the form of Add webs, the higher than those of the die are, the width of which is reduced accordingly, since the energy density also depends on the distance between the webs and the head of the sonotrode.
Man kann für diese neuen Stege dasselbe Material oder ein anderes Material als für die Stege des Schweißprägestempels verwenden.You can use the same material for these new webs or a different material than for the bars of the welding stamp use.
Diese neuen Stege können sehr nahe am Schweißprägestempel angeordnet sein. Das Problem ist aber, daß die Folien dann auch an dieser Stelle verschweißt würden. Dieser Nachteil kann durch ein geeignetes Abschneiden der Folie nach dem Verschweißen vermieden werden. Man kann die neuen Stege des Schweißprägestempels auch entfernt anordnen, damit die Schweißnaht im Bereich des Schweißprägestempels nicht beeinträchtigt wird, wobei die Breite der Sonotrode ausreichend groß sein muß und das Abschneiden nach dem Verschweißen notwendig bleibt, um das Endprodukt zu erhalten.These new bridges can do a lot close to the embossing stamp be arranged. The problem is, however, that the foils are also at this point welded would. This disadvantage can be caused by a suitable cutting of the film after welding be avoided. You can see the new bars of the stamped sweat also arrange away so that the weld seam in the area of the welding stamp not affected is, the width of the sonotrode must be sufficiently large and that Cut off after welding remains necessary to obtain the final product.
Die Beschreibung dieser Lösung ist anwendbar auf alle Formen von Prägestempeln, die eine alternierende Folge von bezogen auf die Laufrichtung der Folien querverlaufenden und längsverlaufenden Abschnitten aufweisen, wobei diese Formen auch konzentrische oder nichtgeschlossene Formen umfassen können.The description of this solution is applicable to all forms of dies, which is an alternating sequence of related to the running direction of the Foils transverse and longitudinal sections have, these shapes also concentric or non-closed Shapes can include.
Bei der zweiten in Betracht gezogenen Ausführungsform wird der relative Abstand der Stege zum Kopf der Sonotrode genutzt, wobei die Dichte der von den Folien bei Berührung der Stege aufgenommenen Energie vom erwähnten Abstand abhängt. So schlägt diese Lösung vor, die Stege der querverlaufenden Abschnitte im Verhältnis zu denjenigen der längsverlaufenden Abschnitte zu erhöhen oder letztere im Verhältnis zu ersteren abzusenken, und zwar abhängig von der Energie, die man übertragen will, und unter Berücksichtigung der Tatsache, daß die Folien die niedrigsten Stege nicht vollständig berühren werden. Da die aufgenommene Energie für näher an der Sonotrode angeordnete Stege höher ist, können die Dichten der von den querverlaufenden und längsverlaufenden Abschnitten aufgenommenen Energie gleich sein, wenn die Höhe der entsprechenden Stege wie zuvor erwähnt als Funktion der Breite der verschiedenen Stege angepaßt wird.Considered at the second embodiment the relative distance between the webs and the head of the sonotrode is used, the density of the films taken up by touching the webs Energy from the mentioned Distance depends. So beats this solution before, the webs of the transverse sections in relation to those of the longitudinal ones Sections to increase or the latter in proportion lowering to the former, depending on the energy you transmit wants, and taking into account the fact that the Foils will not fully touch the lowest ridges. Because the recorded Energy for closer to the Ridges arranged sonotrode higher is, can the densities of the transverse and longitudinal sections absorbed energy will be the same if the height of the corresponding webs As previously mentioned is adjusted as a function of the width of the different webs.
Da der Abstand der Stege zum Kopf der Sonotrode relativ ist, kann man eine andere Variante dieser letzten Lösung in Betracht ziehen. Diese bestünde darin, die Höhe der Sonotrode variieren zu lassen. Mit Hilfe eines Servomotors und auf dem Amboß angeordneten Fühlern kann man die Sonotrode so steuern, daß sie ihre Höhe in Abhängigkeit davon ändert, ob der Bereich des Ambosses, der sich unter ihr befindet, querverlaufende oder längsverlaufende Prägestempel trägt. So hebt sich die Sonotrode in dem Moment des Übergangs von einem querverlaufenden Bereich zu einem längsverlaufenden Bereich um eine bestimmte Höhe, um zu ihrer ursprünglichen Position zurückzukehren, sobald wieder in den querverlaufenden Bereich übergegangen wird, und so weiter. Dieser Höhenunterschied muß nicht zwangsläufig derselbe sein, wie derjenige der bei der ersten Variante dieser Lösung vorgesehen war, und zwar aufgrund des zuvor angesprochenen Kontaktproblems bei den Folien. Diese Ausführungsform ist vielleicht deshalb vorzuziehen, weil die Folien immer in vollständigem Kontakt mit den Stegen bleiben.Since the distance between the webs and the head of the sonotrode is relative, another variant of this last solution can be considered. This would be to vary the height of the sonotrode. With the aid of a servo motor and sensors arranged on the anvil, the sonotrode can be controlled in such a way that its height changes depending on whether the area of the anvil that is beneath it has transverse or longitudinal embossing dies. Thus, at the moment of transition from a transverse region to a longitudinal region, the sonotrode rises by a certain height to return to its original position as soon as the transverse region is changed over again, and so on. This difference in height does not necessarily have to be usually be the same as the one that was provided for in the first variant of this solution, due to the previously mentioned contact problem with the foils. This embodiment may be preferable because the films always remain in full contact with the ridges.
Bei der dritten Ausführungsform des Verfahrens versetzt man die Achse der Sonotrode und des Ambosses in Bezug auf die Laufachse der Folien. Bei dieser Ausführungsform steht die Achse der Sonotrode und des Ambosses in einem Winkel α zur Senkrechten der Laufachse. Es ist wichtig, anzumerken, daß die tangential zum Amboß liegende Laufachse, (eine Senkrechte zur Zylinderachse im Falle eines zylindrischen Ambosses), folglich weiterhin senkrecht zur Achse der Sonotrode verläuft. Die Prägestempel auf dem Amboß sind derart geändert, daß auf den Folien dasselbe Schweißnahtmuster wie vor dem Versetzten der Achse erzielt wird. Es gibt also von der Sonotrode aus gesehen keine querverlaufenden oder längsverlaufenden Abschnitte mehr und die Oberfläche der Stege im Einflußbereich der Schwingungen der Sonotrode bleibt aufgrund der verwendeten Geometrie konstant. Die Energiedichte ist folglich auf allen Abschnitten des Prägestempels konstant und erlaubt ein homogenes Verschweißen.In the third embodiment The process involves moving the axis of the sonotrode and the anvil in relation to the running axis of the foils. In this embodiment the axis of the sonotrode and the anvil is at an angle α to the vertical the barrel axis. It is important to note that the tangent to the anvil Barrel axis, (a perpendicular to the cylinder axis in the case of a cylindrical Anvils), consequently still perpendicular to the axis of the sonotrode runs. The dies are on the anvil changed so that on the same weld pattern on the foils as is achieved before moving the axis. So there are from seen from the sonotrode no transverse or longitudinal Sections more and the surface the webs in the sphere of influence the vibrations of the sonotrode remain due to the geometry used constant. The energy density is consequently on all sections of the stamping die constant and allows homogeneous welding.
Bei der vierten Ausführungsform des Verfahrens ändert man die Laufgeschwindigkeit der Folien in Abhängigkeit von den Abschnitten des Ambosses, die im Einflußbereich der Sonotrode liegen. Wenn die Folien schneller unter der Achse der Sonotrode durchlaufen, nehmen sie nämlich weniger Energie auf. Ausgehend von einer vorgegebenen Laufgeschwindigkeit der Folien beim Passieren des querverlaufenden Bereichs des Schweißprägestempels beschleunigt man also das Vorbeilaufen, um bei einer höheren Geschwindigkeit während des Passierens des längsverlaufenden Bereichs des Prägestempels schnell zu stabilisieren, welcher Bereich folglich eine ge ringere Energie aufnimmt. Die Geschwindigkeit wird derart gewählt, daß die Energiedichte auf Höhe der längsverlaufenden Stege die gleiche wie für die querverlaufenden Stege ist. Dies ist möglich, denn wenn der längsverlaufende Abschnitt eine Gesamtenergie aufnimmt, die geringer als diejenige des querverlaufenden Abschnitts ist, ist dessen Oberfläche geringer, und man kann aus diesem Grund die Geschwindigkeiten so regeln, daß man identische Energiedichten erhält. Die Laufgeschwindigkeit der Folien wird anschließend verringert und auf der Anfangsgeschwindigkeit beim Passieren eines neuen querverlaufenden Bereichs (der zu dem ersten identisch ist) stabilisiert, und so weiter. Diese Geschwindigkeitsänderungen können vorteilhafterweise mit Hilfe eines Servomotors geregelt werden, wobei auf dem Amboß angeordnete Fühler verwendet werden, wie bei der zweiten Variante der zweiten Ausführungsform. Man muß die Prägestempel auf dem Amboß unter Berücksichtigung der Tatsache konzipieren, daß die Geschwindigkeitsänderungen ein sich von dem Prägestempel unterscheidendes Schweißmuster auf den Folien erzeugen.In the fourth embodiment of the procedure changes one the running speed of the foils depending on the sections of the anvil in the sphere of influence the sonotrode. If the slides faster under the axis pass through the sonotrode, they absorb less energy. Based on a specified running speed of the foils accelerated when passing through the transverse region of the welding stamp you have to walk past it at a higher speed during the Passing the longitudinal one Area of the die quickly to stabilize which area consequently has a lower energy receives. The speed is chosen so that the energy density at the level of the longitudinal Bridges the same as for is the transverse webs. This is possible because if the longitudinal Section absorbs a total energy less than that of the transverse section, its surface is less, and for this reason you can regulate the speeds so that you are identical Receives energy densities. The running speed of the films is then reduced and on the Initial speed when passing a new transverse one Area (identical to the first) stabilized, and so further. These speed changes can are advantageously regulated with the aid of a servo motor, being placed on the anvil sensor be used as in the second variant of the second embodiment. you must the dies on the anvil taking into account conceive of the fact that the speed changes one from the embossing stamp distinctive welding pattern generate on the slides.
Es sei darauf hingewiesen, daß man auch in Betracht ziehen kann, die Geschwindigkeit des Ambosses und die Geschwindigkeit der Folien gleichzeitig zu ändern, wodurch eine Änderung der Prägestempel vermieden wird.It should be noted that one too can take into account the speed of the anvil and the The speed of the slides change at the same time, causing a change the embossing stamp is avoided.
Das Verständnis der zuvor dargestellten erfindungsgemäßen Lösungen wird mit Hilfe der folgenden Beschreibung verbessert, in der auf die beigefügten Zeichnungen Bezug genommen wird, in denen:Understanding the previously presented solutions according to the invention improved with the help of the following description, in which on the attached Reference is made to drawings in which:
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1 eine schematische Ansicht einer Ausführungsform der Vorrichtung zum Ultraschallverschweißen zweier Folien darstellt; -1 is a schematic view of an embodiment of the device for ultrasonic welding of two foils; -
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2 eine Draufsicht eines Schweißprägestempels des Ambosses gemäß1 darstellt;-2 a plan view of a welding stamp of the anvil according to1 represents; -
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3 eine Draufsicht des Ambosses gemäß1 mit Energiesenken darstellt;-3 a plan view of the anvil according to1 with energy sinks; -
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4 eine Draufsicht darstellt, die das Schneiden der Folien zeigt, um das Schweißen durch die Energiesenken zu verhindern;-4 Figure 13 is a top view showing the cutting of the foils to prevent welding by the energy sinks; -
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5 eine perspektivische Ansicht eines sich in der Höhe ändernden Profils eines Schweißprägestempels des Ambosses gemäß1 darstellt;-5 a perspective view of a height-changing profile of a welding stamp of the anvil according to1 represents; -
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6a und6b Höhenänderungen der Sonotrode zwischen den querverlaufenden und längsverlaufenden Bereichen eines Schweißprägestempels gemäß1 im Profil darstellen;- the6a and6b Changes in height of the sonotrode between the transverse and longitudinal regions of a welding stamp according to1 show in profile; -
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6c und6d das Höhenprofil der Sonotrode gemäß den6a und6b als Funktion der Bereiche des Ambosses gemäß1 zeigen, die sich unter diesem befinden;- the6c and6d the height profile of the sonotrode according to the6a and6b as a function of the areas of the anvil1 show who are below this; -
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7a eine Draufsicht der Vorrichtung zeigt, in der die Sonotrode und der Amboß bezogen auf die Laufachse der Folien geneigt sind;-7a shows a plan view of the device in which the sonotrode and the anvil are inclined with respect to the axis of travel of the foils; -
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7b ein praktisches Beispiel der Ausführungsform gemäß
7a zeigt;7b shows a practical example of the embodiment according to FIG7a shows; -
– die
8a und8b die Änderungen der Laufgeschwindigkeit der Folien als Funktion derjenigen Bereiche des Ambosses gemäß1 zeigen, die unter der Sonotrode durchlaufen.- the8a and8b the changes in the running speed of the foils as a function of those areas of the anvil according to1 show that pass under the sonotrode.
Es ist anzumerken, daß sich die beigefügten Zeichnungen auf Schweißprägestempel in Form von insgesamt rechteckigen Beuteln bzw. Taschen beziehen. Die in Betracht gezogenen Lösungen sind selbstverständlich auf alle Arten von Prägestempeln anwendbar, die in Bewegungsrichtung eine Folge von querverlaufenden und längsverlaufenden Abschnitten aufweisen.It should be noted that the attached drawings on stamped sweat cover in the form of rectangular bags or bags. The solutions considered are a matter of course applicable to all types of dies, which in the direction of movement is a sequence of transverse and longitudinal Have sections.
Die in
Die Schweißvorrichtung enthält zwei
Rollen
Der Schweißamboß
In der folgenden Beschreibung sind
die Schweißprägestempel
Die zwei Seiten 12, 14 erstrecken
sich insgesamt quer zur Laufrichtung
Die Sonotrode
Die Folien
Gleichzeitig zum Antrieb der Folien
Während
des relativen Vorbeilaufens kommen die beiden Folien
Während
des Schweißens
bringt man zwischen den beiden Folien
Jedoch ist das so beschriebene Schweißen noch nicht so perfekt, wie die es in der Einleitung dargestellt ist.However, the welding so described is still not as perfect as it is presented in the introduction.
Das ergibt sich beim Betrachten der
Schwingungseinflußbereiche
Man sieht also deutlich, daß die von
der Sonotrode
Die Erfindung dient dazu, dieses
Energieverteilungsproblem zu vermeiden und die Energiedichte auf
allen Stegen
Die erste zuvor beschriebene Lösung ist
in
Neben den Prägestempeln
Mit Hilfe dieser Art von in geeigneter
Weise angepaßter
Senke
Durch das Vorbeilaufen der Folien
Die Vorrichtung weist auf dem Weg
der Folien
Die Erfindung schlägt eine
zweite Lösung zum
Angleichen der Energiedichte auf den Stegen
Es sei darauf hingewiesen, daß die erzeugende
Ebene
Genau wie bei der vorhergehenden
Ausführungsform
soll die Geometrie der Höhenunterschiede unter
Berücksichtigung
der Geometrie des ganzen Schweißprägestempels
Eine andere Ausführungsform dieses Prinzips
ist es, die Höhe
der Sonotrode
Der Übergang von einem querverlaufenden Bereich
zu einem längsverlaufenden
Bereich kann einem Servomotor auf Grund von auf dem Amboß angeordneten
Fühlern
Eine weitere von der Erfindung gelieferte
Lösung
zum Angleichen der Energie längs
der Stege
Vorteilhafterweise beträgt der zuvor
beschriebene Winkel α 20°. Der Winkel
zwischen dem Tragelement
Die letzte von der Erfindung vorgeschlagene Lösung zum
Angleichen bzw. Homogenisieren der Energiedichte längs der
Stege
Ausgehend von einer Phase
Das Auffinden der Bereiche
Es sei darauf hingewiesen, daß die Prägestempel des Ambosses in Abhängigkeit von Geschwindigkeitsänderungen geändert werden müssen, wobei die Länge der längsverlaufenden Bereiche verkürzt wird.It should be noted that the dies of the anvil depending of speed changes changed Need to become, being the length the longitudinal one Shortened areas becomes.
Claims (12)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0112328A FR2829961B1 (en) | 2001-09-25 | 2001-09-25 | METHOD AND MACHINE FOR WELDING TWO ULTRASOUND FILMS |
DE10244672A DE10244672A1 (en) | 2001-09-25 | 2002-09-24 | Ultrasound welding procedure and apparatus for two or more films uses uniform level of ultrasound radiation in lengthwise and transverse directions |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0112328A FR2829961B1 (en) | 2001-09-25 | 2001-09-25 | METHOD AND MACHINE FOR WELDING TWO ULTRASOUND FILMS |
DE10244672A DE10244672A1 (en) | 2001-09-25 | 2002-09-24 | Ultrasound welding procedure and apparatus for two or more films uses uniform level of ultrasound radiation in lengthwise and transverse directions |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10244672A1 true DE10244672A1 (en) | 2004-04-01 |
Family
ID=32737072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10244672A Withdrawn DE10244672A1 (en) | 2001-09-25 | 2002-09-24 | Ultrasound welding procedure and apparatus for two or more films uses uniform level of ultrasound radiation in lengthwise and transverse directions |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10244672A1 (en) |
FR (1) | FR2829961B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010035138A1 (en) * | 2010-08-23 | 2012-02-23 | Maschinenfabrik Spaichingen Gmbh | Ultrasound system for sealing, cutting, perforating and/or embossing of material web in e.g. vertical bagging machine to manufacture e.g. bags, has working gap cyclically formed between rotating anvil and sonotrode |
DE102014110634A1 (en) * | 2014-07-28 | 2016-01-28 | Herrmann Ultraschalltechnik Gmbh & Co. Kg | Device for ultrasonically processing materials with triggering device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011095228A1 (en) * | 2010-02-08 | 2011-08-11 | Sca Hygiene Products Ab | Apparatus and method for treating products |
JP6349502B2 (en) * | 2013-04-10 | 2018-07-04 | 株式会社アドウェルズ | Joining device |
EP3341182A1 (en) * | 2015-08-25 | 2018-07-04 | The Procter and Gamble Company | Bonding apparatus |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3562041A (en) * | 1967-10-26 | 1971-02-09 | Cavitron Corp | Method and apparatus for the ultrasonic joining of materials according to a pattern |
US3939033A (en) * | 1974-12-16 | 1976-02-17 | Branson Ultrasonics Corporation | Ultrasonic welding and cutting apparatus |
US5059277A (en) * | 1986-02-28 | 1991-10-22 | The Procter & Gamble Company | Adhesive-free bonding of continuously moving webs to form laminate web |
SE505546C2 (en) * | 1995-12-11 | 1997-09-15 | Moelnlycke Ab | Method of providing a weld or clip by ultrasound |
DE19803638A1 (en) * | 1998-02-02 | 1999-08-05 | Kuesters Eduard Maschf | Device for processing a material web with ultrasound |
JPH11277500A (en) * | 1998-03-31 | 1999-10-12 | Toppan Forms Co Ltd | Ultrasonic machining device |
US6036796A (en) * | 1998-06-26 | 2000-03-14 | Branson Electronics | Closed-loop ultrasonic welding method and apparatus |
FR2787058B1 (en) * | 1998-12-11 | 2001-01-12 | Clip Off | METHOD OF WELDING TWO FILMS BY ULTRASOUND |
-
2001
- 2001-09-25 FR FR0112328A patent/FR2829961B1/en not_active Expired - Fee Related
-
2002
- 2002-09-24 DE DE10244672A patent/DE10244672A1/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010035138A1 (en) * | 2010-08-23 | 2012-02-23 | Maschinenfabrik Spaichingen Gmbh | Ultrasound system for sealing, cutting, perforating and/or embossing of material web in e.g. vertical bagging machine to manufacture e.g. bags, has working gap cyclically formed between rotating anvil and sonotrode |
DE102014110634A1 (en) * | 2014-07-28 | 2016-01-28 | Herrmann Ultraschalltechnik Gmbh & Co. Kg | Device for ultrasonically processing materials with triggering device |
US9833946B2 (en) | 2014-07-28 | 2017-12-05 | Herrmann Ultraschalltechnik Gmbh & Co. Kg | Device for the ultrasonic processing of materials having a trigger apparatus |
Also Published As
Publication number | Publication date |
---|---|
FR2829961A1 (en) | 2003-03-28 |
FR2829961B1 (en) | 2006-11-10 |
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Effective date: 20120403 |