FR2571639A1 - Anvil and sonotrode for an ultrasonic welding (soldering) apparatus - Google Patents

Anvil and sonotrode for an ultrasonic welding (soldering) apparatus Download PDF

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Publication number
FR2571639A1
FR2571639A1 FR8415798A FR8415798A FR2571639A1 FR 2571639 A1 FR2571639 A1 FR 2571639A1 FR 8415798 A FR8415798 A FR 8415798A FR 8415798 A FR8415798 A FR 8415798A FR 2571639 A1 FR2571639 A1 FR 2571639A1
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FR
France
Prior art keywords
sonotrode
balls
anvil
guide path
anvils
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR8415798A
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French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
COUFFIN JEAN CLAUDE
Original Assignee
COUFFIN JEAN CLAUDE
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 COUFFIN JEAN CLAUDE filed Critical COUFFIN JEAN CLAUDE
Priority to FR8415798A priority Critical patent/FR2571639A1/en
Publication of FR2571639A1 publication Critical patent/FR2571639A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • 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
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7888—Means for handling of moving sheets or webs
    • B29C65/7894—Means for handling of moving sheets or webs of continuously moving sheets or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81465—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed behind the other in a single row in the feed direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B29C66/81611—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • B29C66/82263—Follower pin or roller cooperating with 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
    • B29C66/83—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
    • B29C66/83441—Ball 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—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
    • B29C66/92651—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 using stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93451—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed by controlling or regulating the rotational speed, i.e. the speed of revolution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/088—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using several cooperating sonotrodes, i.e. interacting with each other, e.g. for realising the same joint
    • 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
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • 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
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Abstract

The apparatus comprises a fixed sonotrode and an anvil formed from a plurality of small anvils 24 mounted on springs 25 which push them towards the sonotrode. The small anvils 24 are virtually contiguous. The small anvils are balls 24 housed in cages 20 of a block 12. Each ball 24 is thrust by a spring 25 bearing at the bottom 23 of the cage and has its travel, towards the sonotrode, limited by a circular stop 17. In a variant, the contiguous balls circulate in a guide track.

Description

La présente invention concerne un appareil de soudage par ultrasons. L'appareil de soudage suivant l'invention est notamment utile dans une installation de remplissage de sacs où il permet d'effectuer la fermeture en continu des sacs en matière plastique en soudant leurs bords libres au moyen d'ultrasons
Dans une telle installation de remplissage, les sacs sont remplis sous une trémie, puis transportés accrochés sous un convoyeur vers un appareil de soudage qui en soudent les bords libres afin de fermer les sacs. Dans certains cas, le convoyeur arrête chaque sac à fermer devant l'appareil de soudage, mais ce processus ne permet d'atteindre que des cadences moyennes de production. On tend actuellement à prévoir des convoyeurs fonctionnant à vitesse constante, ce qui nécessite que l'appareil de soudage fonctionne en "continu".The present invention relates to an ultrasonic welding apparatus. The welding device according to the invention is particularly useful in a bag filling installation where it makes it possible to continuously close the plastic bags by welding their free edges by means of ultrasound.
In such a filling installation, the bags are filled under a hopper, then transported hooked under a conveyor to a welding device which welds the free edges in order to close the bags. In some cases, the conveyor stops each bag to be closed in front of the welding machine, but this process only achieves average production rates. There is currently a tendency to provide conveyors operating at constant speed, which requires that the welding apparatus operate "continuously".

Les appareils de soudage à fonctionnement continu connus pour ce genre d'installation sont équipés de thermorésistances. Ces appareils sont bien adaptés aux chaînes d'emballages à déplacement continu, mais ils présentent un certain nombre d'inconvénients. Ainsi, quand les sacs à souder sont des sacs à plis, les soudures réalisées ne sont pas fiables car l'épaisseur du matériau à traiter n'est pas constante. D'autre part, la vitesse de défilement doit rester relativement faible, de l'ordre de 15 m/mn. En cas de fonctionnement à cadence élevée, un poste de refroidissement devient nécessaire ce qui augmente le coût de l'installation. Enfin, il y a des risques de souillure des résistances. The welding machines with continuous operation known for this type of installation are equipped with thermoresistors. These devices are well suited to continuously moving packaging chains, but they have a number of drawbacks. Thus, when the bags to be welded are pleated bags, the welds produced are not reliable because the thickness of the material to be treated is not constant. On the other hand, the running speed must remain relatively low, of the order of 15 m / min. In the event of operation at high rate, a cooling station becomes necessary which increases the cost of the installation. Finally, there are risks of soiling the resistors.

Dans le document EP-A-O 092 866, il est prévu un appareil de soudage électronique de films minces comportant une sonotrode, couplée à une générateur d'ultrasons, et une enclume cylindrique pouvant tourner librement autour de son axe. Les films à souder passant entre la sonotrode et l'enclume entrainent celle-ci en rotation. Dans cet appareil, la sonotrode est fixe, aux oscillations ultrasoniques près. In document EP-A-0 092 866, an apparatus is provided for the electronic welding of thin films comprising a sonotrode, coupled to an ultrasonic generator, and a cylindrical anvil which can rotate freely around its axis. The films to be welded passing between the sonotrode and the anvil cause the latter to rotate. In this device, the sonotrode is fixed, except for ultrasonic oscillations.

Il en résulte que l'appareil est uniquement prévu pour souder des couches de films d'épaisseur constante. Un tel appareil ne peut être utiliser directement pour souder des sacs à plis où l'épaisseur à souder varie du simple au double des bords au centre.As a result, the apparatus is only intended for welding layers of films of constant thickness. Such a device cannot be used directly for welding pleated bags where the thickness to be welded varies from a single to double the edges in the center.

Un objet de l'invention consiste à prévoir un appareil de soudage à ultrasons qui permet d'éviter les inconvénients mentionnés ci-dessus, tout en fonctionnant en continu à cadence élevée
Suivant une caractéristique de l'invention, il est prévu un appareil de soudage par ultrasons dans lequel la sonotrode est fixe et l'enclume est formée d'une pluralité de petites enclumes montées sur des ressorts les poussant vers la sonotrode, les petites enclumes étant pratiquement jointives.An object of the invention is to provide an ultrasonic welding device which makes it possible to avoid the drawbacks mentioned above, while operating continuously at a high rate.
According to a characteristic of the invention, there is provided an ultrasonic welding apparatus in which the sonotrode is fixed and the anvil is formed of a plurality of small anvils mounted on springs pushing them towards the sonotrode, the small anvils being practically contiguous.

Suivant une autre caractéristique, les petites enclumes sont des billes logées dans des cages d'un bloc, chaque bille étant poussée par un ressort s'appuyant au fond de la cage et chaque bille ayant sa course limitée vers la sonotrode par une butée circulaire. According to another characteristic, the small anvils are balls housed in cages of a block, each ball being pushed by a spring resting on the bottom of the cage and each ball having its stroke limited towards the sonotrode by a circular stop.

Suivant une autre caractéristique, les petites enclumes sont des billes circulant dans un chemin de guidage bouclé comportant un segment en face de la sonotrode, l'avant du chemin de guidage étant ouvert sur ledit segment, mais limitant la course des billes vers l'avant, le fond du chemin de guidage étant, au moins sur ledit segment, formé d'une pluralité de plaques pratiquement jointives poussées par des ressorts. According to another characteristic, the small anvils are balls circulating in a looped guide path comprising a segment opposite the sonotrode, the front of the guide path being open on said segment, but limiting the stroke of the balls towards the front , the bottom of the guide path being, at least on said segment, formed of a plurality of substantially contiguous plates pushed by springs.

Suivant une autre caractéristique, les billes sont entraînées en translation dans le chemin de guidage par des moyens moteurs. According to another characteristic, the balls are driven in translation in the guide path by motor means.

Suivant une autre caractéristique, des moyens sont prévus pour commander la tension des ressorts. According to another characteristic, means are provided for controlling the tension of the springs.

Les caractéristique de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaîtront plus clairement à la lecture de la description suivante d'exemples de réalisation, ladite description étant faite en relation avec les dessins joints, parmi lesquels:
la Fig. 1 est une vue schématique en plan d'une installation illustrant le soudage d'un sac à plis,
la Fig. 2 est une vue schématique en élévation de l'installation de la Fig. 1,
la Fig. 3 est une vue en coupe d'une enclume suivant l'invention, utilisable dans l'installation de la Fig. 1,
la Fig. 4 est une vue en plan de l'enclume de la Fig. 3,
la Fig. 5 est une vue schématique en plan d'un autre exemple de réalisation d'enclume,
la Fig. 6 est une vue en coupe d'une partie de l'enclume de la
Fig. 5, suivant la ligne VI-VI, et
la Fig. 7 est une vue en coupe d'une partie de l'enclume de la
Fig. 5, suivant la ligne VII-VII.The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of exemplary embodiments, said description being made in relation to the accompanying drawings, among which:
Fig. 1 is a schematic plan view of an installation illustrating the welding of a pleated bag,
Fig. 2 is a schematic view in elevation of the installation of FIG. 1,
Fig. 3 is a sectional view of an anvil according to the invention, usable in the installation of FIG. 1,
Fig. 4 is a plan view of the anvil of FIG. 3,
Fig. 5 is a schematic plan view of another example of an anvil embodiment,
Fig. 6 is a sectional view of part of the anvil of the
Fig. 5, along line VI-VI, and
Fig. 7 is a sectional view of part of the anvil of the
Fig. 5, along line VII-VII.

L'installation des Figs. 1 et 2 comprend deux paires de courroies la, lb et 2a, 2b, une sonotrode 3, couplée à un générateur d'ultrasons 4, et une enclume 5. La paire de courroies la, 1B et la paire de courroies 2a, 2b sont réspectivement alignées verticalement. The installation of Figs. 1 and 2 comprises two pairs of belts la, 1b and 2a, 2b, a sonotrode 3, coupled to an ultrasonic generator 4, and an anvil 5. The pair of belts la, 1B and the pair of belts 2a, 2b are respectively aligned vertically.

Dans chaque paire, les deux courroies ont des parties adjacentes serrées l'une contre l'autre pour coincer une partie de sac. Les courroies la et 2a sont entraînées par des galets, non montrés, à arbres communs 6a et 7a. De même, les courroies lb et 2b sont entraînées par des galets, non montrés, à arbres communs 6b et 7b.In each pair, the two straps have adjacent portions tightened against each other to wedge a bag portion. The belts 1a and 2a are driven by rollers, not shown, with common shafts 6a and 7a. Likewise, the belts 1b and 2b are driven by rollers, not shown, with common shafts 6b and 7b.

La zone de soudage définie par l'intervalle entre la sonotrode 3 et l'enclume 5 se trouve à une hauteur intermédiaire entre les paires de courroies. The welding zone defined by the interval between the sonotrode 3 and the anvil 5 is at an intermediate height between the pairs of belts.

Comme le montre la Fig. 1, le sac 8, dont la partie avant du col est déjà entraînée par les courroies, comporte des plis avant 9 et arrière 10, étant entendu que le bas du sac plein est #gonflé. Au niveau des plis 9 et 10, on a quatre épaisseurs à souder ensemble alors que dans la partie centrale 11, il n'y a que deux épaisseurs. As shown in Fig. 1, the bag 8, the front part of the neck of which is already driven by the belts, has front 9 and rear 10 folds, it being understood that the bottom of the full bag is # inflated. At the folds 9 and 10, there are four thicknesses to be welded together while in the central part 11, there are only two thicknesses.

L'enclume montrée aux Figs. 3 et 4 permet d'absorber cette différence d'épaisseur tout en assurant un soudage parfait. Cette enclume comprend un corps 12 d'allure sensiblement parallélépipèdique avec, dans l'exemple montré, huit trous 13, parallèles et identiques, qui le traversent de part en part. La face avant 14 du bloc 12, c'est-à-dire la face en regard de la sonotrode, n'est pas entièrement plane, mais comporte un épaulement 15 délimitant une surface plane 16 en retrait de quelques millimètres. Contre la surface 16, se fixe une lame 17 de même épaisseur que le retrait. La lame 17 est percée d'autant de trous 18 que le corps 12, les trous 18 étant coaxiaux avec les trous 13. The anvil shown in Figs. 3 and 4 can absorb this difference in thickness while ensuring perfect welding. This anvil comprises a body 12 of substantially parallelepiped shape with, in the example shown, eight holes 13, parallel and identical, which pass right through. The front face 14 of the block 12, that is to say the opposite face of the sonotrode, is not entirely flat, but has a shoulder 15 delimiting a flat surface 16 set back a few millimeters. Against the surface 16, a blade 17 of the same thickness as the shrinkage is fixed. The blade 17 is pierced with as many holes 18 as the body 12, the holes 18 being coaxial with the holes 13.

Chaque trou 13 est de révolution autour d'un axe 19 et comporte un cuvette avant 20, un orifice intermédiaire 21 et un trou taraudé 22 à l'arrière. Le diamètre de la cuvette 20 est nettement supérieur à celui du trou intermédiaire 21. La hauteur de la cuvette 20 est au moins égale à son diamètre. Dans le trou taraudé 22, se visse un bouchon fileté 23 permettant un réglage fin, ce bouchon n'étant pas indispensable. Each hole 13 is of revolution about an axis 19 and comprises a front bowl 20, an intermediate orifice 21 and a tapped hole 22 at the rear. The diameter of the bowl 20 is significantly greater than that of the intermediate hole 21. The height of the bowl 20 is at least equal to its diameter. A threaded plug 23 is screwed into the threaded hole 22 allowing fine adjustment, this plug not being essential.

Les trous 18 de la lame 17 sont légèrement coniques, avec un diamètre-diminuant de l'arrière vers l'avant. Le diamètre du cercle, situé le plus à l'avant, est nettement inférieur à celui de la cuvette 20.  The holes 18 of the blade 17 are slightly conical, with a diameter-decreasing from the rear to the front. The diameter of the circle, furthest forward, is much smaller than that of the bowl 20.

Dans la cuvette 20, est placée une bille 24 dont le diamètre est, bien sur, inférieur à #celui de la cuvette, mais supérieur à celui des trous 18. Entre la bille 24 et le bout du bouchon 23 est monté un ressort 25 travaillant en compression. Le ressort 25 est maintenu rectiligne par l'orifice intermédiaire 21. Le ressort 25 est plus ou moins comprimé selon que le ressort est plus ou moins vissé dans 22. In the bowl 20, a ball 24 is placed, the diameter of which is, of course, less than that of the bowl, but greater than that of the holes 18. Between the ball 24 and the end of the plug 23 is a working spring 25 in compression. The spring 25 is kept straight by the intermediate orifice 21. The spring 25 is more or less compressed depending on whether the spring is more or less screwed into 22.

Il en résulte que la bille 24 est poussée par le ressort 25 vers le trou 18 dont le diamètre est suffisamment grand pour qu'une calotte sphérique de la bille dépasse à l'extérieur. As a result, the ball 24 is pushed by the spring 25 towards the hole 18 whose diameter is large enough for a spherical cap of the ball to protrude outside.

Ainsi, quand le col du sac 8 défile entre la sonotrode fixe 3 et l'enclume 4, les billes 24 reculent dans leurs cuvettes 20 en comprimant les ressorts 25, selon l'épaisseur de matériau à souder. Thus, when the neck of the bag 8 passes between the fixed sonotrode 3 and the anvil 4, the balls 24 retreat into their cups 20 by compressing the springs 25, depending on the thickness of material to be welded.

En pratique, selon l'épaisseur maximale à souder, ou la nature du matériau, on peut choisir des diamètres de billes différents et des valeurs de compression de ressort différentes. In practice, depending on the maximum thickness to be welded, or the nature of the material, it is possible to choose different ball diameters and different spring compression values.

Pour placer les billes, ou les échanger, il suffit de démonter la lame 17, reliée au corps 12 par des moyens classiques, ce qui donne accès à la cuvette. To place the balls, or exchange them, it suffices to disassemble the blade 17, connected to the body 12 by conventional means, which gives access to the bowl.

Dans cet exemple de réalisation, les billes 24 constituent une pluralité de petites enclumes qui sont# emprisonnées dans des cages formées par les cuvettes 20 ayant leur course vers 11 avant limitée par les trous 18 de la lame 17. Bien entendu, on pourrait remplacer les billes par des corps de forme ovolde ou même de forme présentant une surface plane vers l'avant, les bords de cette surface étant toutefois arrondis pour que le matériau à souder ne se coince pas entre deux petites enclumes. Il est cependant préférable d'utiliser des billes, quand cela est possible, étant donné qu'elles sont disponibles sur le marché. In this exemplary embodiment, the balls 24 constitute a plurality of small anvils which are # trapped in cages formed by the bowls 20 having their stroke towards 11 before limited by the holes 18 of the blade 17. Of course, one could replace the balls by bodies of ovoid shape or even shape having a planar surface towards the front, the edges of this surface being however rounded so that the material to be welded does not get caught between two small anvils. It is however preferable to use beads, when possible, since they are available on the market.

La Fig. 5 montre un autre exemple de réalisation d'enclume suivant l'invention. Elle se compose d'une pluralité de billes 26 logées dans un chemin de guidage ayant en plan la forme d'une boucle constituée par deux demi-cercles 27 et 28 dont les extrémités adjacentes sont réunies par des segments de droite 29 et 30, parallèles à la ligne 31 joignant les centres 32 et 33 des demi-cercles. Fig. 5 shows another embodiment of the anvil according to the invention. It consists of a plurality of balls 26 housed in a guide path having in plan the form of a loop constituted by two semicircles 27 and 28 whose adjacent ends are joined by straight line segments 29 and 30 at line 31 joining the centers 32 and 33 of the semicircles.

Comme le montre la coupe de la Fig. 6, le chemin de guidage se compose, le long du segment 29, qui est en face de la sonotrode 3 et parallèle à celle-ci, de deux parois horizontales 34 et 35 avec des retours verticaux 36 et 37 dirigés l'un vers l'autre. Les bords des retours 36 et 37 déterminent un intervalle qui est plus étroit que le diamètre des billes 26. Les billes 26 sont poussées contre cet intervalle par des plaques 38 sur lesquelles s'appuient des ressorts 39. Les plaques 38 ont une largeur. inférieure à l'espace entre les parois et une longueur égale au diamètre d'une bille 26 ou à deux fois ce dernier. Ainsi, dans la zone du segment 29, les billes 26 peuvent reculer individuellement ou par deux, le recul étant fonction de l'épaisseur de matériau à souder compris entre l'enclume et la sonotrode. As shown in the section of FIG. 6, the guide path is composed, along the segment 29, which is opposite the sonotrode 3 and parallel to it, two horizontal walls 34 and 35 with vertical returns 36 and 37 directed one towards the 'other. The edges of the returns 36 and 37 determine an interval which is narrower than the diameter of the balls 26. The balls 26 are pushed against this interval by plates 38 on which springs 39 are supported. The plates 38 have a width. less than the space between the walls and a length equal to the diameter of a ball 26 or twice the latter. Thus, in the zone of segment 29, the balls 26 can retreat individually or in pairs, the recoil being a function of the thickness of material to be welded comprised between the anvil and the sonotrode.

Au lieu des plaques 38 et des ressorts 39, on peut utiliser une plaque en élastomère souple servant de ressort. Instead of the plates 38 and the springs 39, it is possible to use a flexible elastomer plate serving as a spring.

Les billes 26 peuvent être entraînées simplement par le matériau à souder passant entre l'enclume et la sonotrode. Elles peuvent être aussi entraînées par des roues à picots, telles que 40 et 41 d'axes respectifs 32 et 33. The balls 26 can be driven simply by the material to be welded passing between the anvil and the sonotrode. They can also be driven by sprockets, such as 40 and 41 with respective axes 32 and 33.

La coupe de la Fig. 7, suivant la ligne Vil-Vil de la Fig. 5, montre les parois 34 et 35 du guide et la roue 40 qui empêche la bille 26 de tomber. Les picots 42 s'intercalent entre deux billes pour les pousser quand la roue est entraînée par un moteur. On peut ainsi faire varier la vitesse relative des billes par rapport à celle du matériau à souder de manière à faire varier les points de soudage sur le matériau. The section of FIG. 7, along the line Vil-Vil of FIG. 5, shows the walls 34 and 35 of the guide and the wheel 40 which prevents the ball 26 from falling. The pins 42 are inserted between two balls to push them when the wheel is driven by a motor. It is thus possible to vary the relative speed of the balls relative to that of the material to be welded so as to vary the welding points on the material.

Dans cet exemple de réalisation, les billes sont encore les petites enclumes et le chemin de guidage constitue une cage unique. In this embodiment, the balls are still the small anvils and the guide path constitutes a single cage.

Bien entendu, en dehors du segment 29, on peut laisser se rejoindre les rebords 36 et 37.Of course, outside of segment 29, edges 36 and 37 can be joined.

A noter encore qu'au lieu de prévoir une sonotrode fixe et une pluralité d'enclumes montées élastiquement, on pourrait prévoir une pluralité de sonotrodes montées élastiquement et une enclume fixe ou une enclume suivant l'invention. La sonotrode pourrait alors avoir une structure semblable aux structures d'enclume qui viennent d'être décrites. It should also be noted that instead of providing a fixed sonotrode and a plurality of anvil-mounted anvils, a plurality of elastically-mounted sonotrodes and a fixed anvil or anvil according to the invention could be provided. The sonotrode could then have a structure similar to the anvil structures which have just been described.

Dans l'installation qui vient d'être décrite, on a prévu deux paires de courroies la, lb et 2a, 2b, mais il doit être bien entendu que, dans certains cas, une seule paire de courroies, telles que 2a, 2b, peut suffire. De même, dans certains cas, on peut avoir plus de quatre épaisseurs à souder. In the installation which has just been described, two pairs of belts 1a, 1b and 2a, 2b have been provided, but it should be understood that, in certain cases, only one pair of belts, such as 2a, 2b, may suffice. Similarly, in some cases, there may be more than four thicknesses to be welded.

A noter que les billes peuvent, pour certaines applications, être remplacées par des rondelles, montées dans un même plan avec leurs axes parallèles. Les surfaces latérales de ces rondelles peuvent être striées. ;Bien entendu, dans ce cas, les cuvettes 20 ont une géométrie adaptée aux rondelles. Note that the balls can, for certain applications, be replaced by washers, mounted in the same plane with their parallel axes. The lateral surfaces of these washers can be striated. ; Of course, in this case, the cups 20 have a geometry adapted to the washers.

A noter encore que toute l'enclume peut être montée sur un ressort. Egalement, l'enclume peut être remplacée par une autre sonotrode montée sur ressort.  Note also that the entire anvil can be mounted on a spring. Also, the anvil can be replaced by another spring-mounted sonotrode.

Claims (7)

REVENDICATIONS 1) Appareil de soudage par ultrasons caractérisé en ce que la sonotrode (3) est fixe et l'enclume (5) est formée d'une pluralité de petites enclumes (24) montées sur des ressorts (25) les poussant vers la sonotrode (3), les petites enclumes (24) étant pratiquement jointives. 1) Ultrasonic welding apparatus characterized in that the sonotrode (3) is fixed and the anvil (5) is formed of a plurality of small anvils (24) mounted on springs (25) pushing them towards the sonotrode ( 3), the small anvils (24) being practically contiguous. 2) Appareil suivant la revendication 1 caractérisé en ce que les petites enclumes sont des billes (24) logées dans des cages (20) d'un bloc (12), chaque bille (24) étant poussée par un ressort (25) s'appuyant au fond (23) de la cage et chaque bille (24) ayant sa course limitée vers la sonotrode (3) par une butée circulaire (17). 2) Apparatus according to claim 1 characterized in that the small anvils are balls (24) housed in cages (20) of a block (12), each ball (24) being pushed by a spring (25) s' pressing at the bottom (23) of the cage and each ball (24) having its stroke limited towards the sonotrode (3) by a circular stop (17). 3) Appareil suivant la revendication 1, caractérisé en ce que les petites enclumes sont des billes (26) circulant dans un chemin de guidage bouclé comportant un segment (29) en face de la sonotrode (3), l'avant du chemin de guidage étant ouvert sur ledit segment (29), mais limitant la course des billes vers l'avant, le fond du chemin de guidage étant, au moins sur ledit segment, formé d'une pluralité de plaques (38) pratiquement jointives poussées par des ressorts (39). 3) Apparatus according to claim 1, characterized in that the small anvils are balls (26) flowing in a looped guide path comprising a segment (29) opposite the sonotrode (3), the front of the guide path being open on said segment (29), but limiting the forward travel of the balls, the bottom of the guide path being, at least on said segment, formed of a plurality of practically contiguous plates (38) pushed by springs (39). 4) Appareil suivant la revendication 3, caractérisé en ce que les billes (26) sont entraînées en translation dans le chemin de guidage par des moyens moteurs. 4) Apparatus according to claim 3, characterized in that the balls (26) are driven in translation in the guide path by motor means. 5) Appareil suivant l'une des revendicati#ons 2 à 3, caractérisé en ce que les billes sont remplacées par des rondelles, les cages ayant une géométrie adaptée, les rondelles étant ou se déplaçant dans un plan perpendiculaire à leurs axes. 5) Apparatus according to one of claims # ons 2 to 3, characterized in that the balls are replaced by washers, the cages having a suitable geometry, the washers being or moving in a plane perpendicular to their axes. 6) Appareil suivant l'une des revendications 1 à 5, caractérisé en ce que des moyens (23) sont prévus pour commander la tension des ressorts (25). 6) Apparatus according to one of claims 1 to 5, characterized in that means (23) are provided for controlling the tension of the springs (25). 7) Appareil suivant l'une des revendications 1 à 6, caractérisé en ce que les structures de la sonotrode et de l'enclume sont échangées.  7) Apparatus according to one of claims 1 to 6, characterized in that the structures of the sonotrode and the anvil are exchanged.
FR8415798A 1984-10-12 1984-10-12 Anvil and sonotrode for an ultrasonic welding (soldering) apparatus Withdrawn FR2571639A1 (en)

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Cited By (12)

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Publication number Priority date Publication date Assignee Title
EP0333390A2 (en) * 1988-03-12 1989-09-20 The Mead Corporation Ultrasonic heat sealing device
EP0333390A3 (en) * 1988-03-12 1990-12-12 The Mead Corporation Ultrasonic heat sealing device
WO2002014054A1 (en) * 2000-08-10 2002-02-21 Furukawa Mfg. Co., Ltd. Ultrasonic sealing device for packaging material
US6599389B1 (en) 2000-08-10 2003-07-29 Furukawa Mfg. Co., Ltd. Ultrasonic sealing device for packaging material
EP1561566A2 (en) * 2000-08-10 2005-08-10 Furukawa Mfg. Co., Ltd. Ultrasonic sealing device for packaging material
EP1561566A3 (en) * 2000-08-10 2006-07-05 Furukawa Mfg. Co., Ltd. Ultrasonic sealing device for packaging material
EP1535723A2 (en) * 2003-11-29 2005-06-01 Herrmann Ultraschalltechnik GmbH & Co. KG Apparatus for welding multilayered sheets
EP1535723A3 (en) * 2003-11-29 2006-10-04 Herrmann Ultraschalltechnik GmbH & Co. KG Apparatus for welding multilayered sheets
EP1923201A1 (en) 2006-11-20 2008-05-21 Jentschmann AG Zürich Ultrasonic welding device
CN106926474A (en) * 2017-05-17 2017-07-07 烟台凯博机械自动化设备有限公司 Medical precision filter apparatus for welding and positioning
CN106926474B (en) * 2017-05-17 2023-02-28 烟台凯博机械自动化设备有限公司 Medical precision filter welding positioning device
EP3663076A1 (en) * 2018-12-07 2020-06-10 Tetra Laval Holdings & Finance S.A. Sealing jaw, packaging container and method for sealing

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