FR2474944A1 - Heated ultrasonic welding tool for joining photographic films - small enough for integration with other film processing apparatus - Google Patents

Heated ultrasonic welding tool for joining photographic films - small enough for integration with other film processing apparatus Download PDF

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Publication number
FR2474944A1
FR2474944A1 FR8002633A FR8002633A FR2474944A1 FR 2474944 A1 FR2474944 A1 FR 2474944A1 FR 8002633 A FR8002633 A FR 8002633A FR 8002633 A FR8002633 A FR 8002633A FR 2474944 A1 FR2474944 A1 FR 2474944A1
Authority
FR
France
Prior art keywords
anvil
block
oscillator
tool
strip
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.)
Granted
Application number
FR8002633A
Other languages
French (fr)
Other versions
FR2474944B1 (en
Inventor
Philippe Coudert
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.)
Societe des Telephones Ericsson SA
Original Assignee
Societe des Telephones Ericsson SA
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 Societe des Telephones Ericsson SA filed Critical Societe des Telephones Ericsson SA
Priority to FR8002633A priority Critical patent/FR2474944A1/en
Publication of FR2474944A1 publication Critical patent/FR2474944A1/en
Application granted granted Critical
Publication of FR2474944B1 publication Critical patent/FR2474944B1/fr
Granted 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
    • B29C65/78—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
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7443—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc by means of ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—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
    • 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
    • B29C66/81—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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • B29C66/81812—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws the welding jaws being cooled from the outside, e.g. by blowing a gas or spraying a liquid
    • 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
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91212—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91431—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being kept constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5092—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the tape handling mechanisms, e.g. using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • 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
    • B29L2031/764—Photographic equipment or accessories
    • B29L2031/7644—Films

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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

A tool for ultrasonic welding of joints between the ends of thin films is built so that the head of the mobile tool can be maintained at a warm or hot temp. which the piezo electric element producing the oscillations are kept relatively cool, e.g. by local forced ventilation. Esp. claimed for butt jointing successive lengths of 35 mm film for developing and processing in bulk, using bridging pieces coated with a compatible fusible adhesive. The greater efficiency of a warm tool head allows the size and power of the welding tool to be sealed down sufficiently for incorporation into a common multi-stage film prepn. and processing unit.

Description

Dispositif de soudage à ultra-sons de
tronçons de bande mince, notamment de films.Ultrasonic welding device of
sections of thin strip, in particular of films.

La présente invention a pour objet un dispositif de soudage par ultra-sons de tronçons de bande mince. The present invention relates to a device for ultrasonic welding of thin strip sections.

Elle trouve une application particulièrement importante, bien que non exclusive, dans le collage bout à bout de films photographiques, par exemple après extraction des boltiers et tronçonnage et avant développement.It finds a particularly important, although not exclusive, application in the end-to-end bonding of photographic films, for example after extraction of the boltiers and sectioning and before development.

On connait des dispositifs de soudage par ultrasons qui comprennent une enclume et un bloc générateur de vibrations comportant un oscillateur ultra-sonore interposé entre un amortisseur et un corps,rapprochable de l'enclume pour enserrer avec elle deux tronçons à joindre. Ultrasonic welding devices are known which include an anvil and a vibration generator block comprising an ultrasonic oscillator interposed between a damper and a body, close to the anvil to enclose with it two sections to be joined.

Mais les dispositifs connus ont l'inconvénient d'un rendement relativement faible et d'un encombrement important qui notamment rendent difficile leur incorporation à une machine complète de traitement de films. However, the known devices have the drawback of a relatively low yield and of a large bulk which in particular make it difficult to incorporate them into a complete film processing machine.

L'invention vise notamment à fournir un dispositif de soudage répondant mieux que ceux antérieurement connus aux exigences de la pratique, notamment en ce qu'il présente un rendement de conversion de l'énergie électrique d'excitation en énergie ultra-sonore accrue et en ce qu'il est en conséquence réalisable sous un encombrement réduit. The invention aims in particular to provide a welding device which responds better than those previously known to the requirements of practice, in particular in that it has a conversion efficiency of the excitation electric energy into increased ultrasonic energy and in which is therefore achievable under a reduced footprint.

Dans ce but, l'invention propose notamment un dispositif de soudage dans lequel le bloc est muni de moyens destinés à maintenir l'outil à température déterminée, supérieure à la température ambiante,et l'oscillateur, de type piézo-électrique, à température inférieure à celle du corps. To this end, the invention proposes in particular a welding device in which the block is provided with means intended to maintain the tool at a determined temperature, above ambient temperature, and the oscillator, of piezoelectric type, at temperature lower than that of the body.

Le chauffage du corps permet d'augmenterl'amplitude vibratoire de l'outildans un rapport important, typiquement de l'ordre de 2 lorsque le corps est à une température de 500C environ. Heating the body increases the vibratory amplitude of the tool in a significant ratio, typically of the order of 2 when the body is at a temperature of around 500C.

En évitant de porter l'oscillateur à la meme température, on préserve son rendement et on évite donc les conséquences néfastes que pourrai t avoir l'échauffement. By avoiding bringing the oscillator to the same temperature, it preserves its performance and therefore avoids the harmful consequences that may have t heating.

Grâce à l'augmentation du rendement, il est possible de réduire l'importance de l'oscillateur et de la puissance électrique qui lui est appliquée, donc d'arriver à une dimension acceptable pour un dispositif suscep- tible de raccorder notamment le film de 35 mm standard. Thanks to the increase in efficiency, it is possible to reduce the size of the oscillator and of the electric power applied to it, and therefore to reach an acceptable size for a device capable of connecting in particular the film of 35 mm standard.

Les moyens destinés à porter le corps à une température supérieure à l'ambiante seront généralement constitués par une résistance chauffante bobinée sur le bloc. The means intended to bring the body to a temperature above ambient will generally consist of a heating resistor wound on the block.

L'oscillateur pourra etre maintenu à basse température par ventilation. Un circuit de régulation thermique dont l'organe d'entrée est un capteur porté par l'outil sera généralement prévu pour maintenir les différents organes à la température optimale.The oscillator can be kept at low temperature by ventilation. A thermal regulation circuit, the input member of which is a sensor carried by the tool, will generally be provided to maintain the various members at the optimum temperature.

L'invention sera mieux comprise à la lecture de la description qui suit d'un dispositif qui en constitue un mode particulier de réalisation, donné à titre d'exemple non limitatif. La description se réfère aux dessins qui l'accompagnent, dans lesquels
- la figure 1 est un schéma de principe du dispositif, en coupe suivant un plan passant par l'axe du bloc générateur et de l'enclume
- la figure 2 est une vue de détail montrant l'aspect de la face terminale de l'enclume
- la figure 3 est une vue de détail montrant les faces en regard de l'enclume et du bloc, dans la direction de la flèche 3-3 de la figure 1
- la figure 4 est un schéma montrant la disposition relative des tronçons de bande, de l'enclume et du corps lors du soudaqe.The invention will be better understood on reading the following description of a device which constitutes a particular embodiment thereof, given by way of nonlimiting example. The description refers to the accompanying drawings, in which
- Figure 1 is a block diagram of the device, in section along a plane passing through the axis of the generator block and the anvil
- Figure 2 is a detail view showing the appearance of the end face of the anvil
- Figure 3 is a detail view showing the facing faces of the anvil and the block, in the direction of arrow 3-3 of Figure 1
- Figure 4 is a diagram showing the relative arrangement of the strip sections, the anvil and the body during the welding.

Le dispositif montré en figure 1 peut être dimensionné pour réaliser le collage bout bout de tronçons de film 35 mm (format dit 135). Il peut être incorporé dans une installation destinée à recevoir en séquence des bobines chargeurs de films impressionnés et à reste tuer des bobines comportant plusieurs centaines de films raccordés bout à bout, bobines développables en continu. The device shown in FIG. 1 can be dimensioned to carry out the end-to-end bonding of sections of 35 mm film (format known as 135). It can be incorporated into an installation intended to receive, in sequence, reels for loading impressed films and for remaining to kill reels comprising several hundred films connected end to end, reels which can be developed continuously.

Le dispositif peut être recardé comme comprenant une enclume fixe 10 et un bloc générateur 11 pouvant prendre, l'un par rapport à l'autre, la position écartée dans laquelle ils sont montrés en figure I, et une position rapprochée dans laquelle ils enserrent deux tronçons 12a et 12b de films à raccorder. The device can be recarded as comprising a fixed anvil 10 and a generator block 11 which can take, relative to each other, the separated position in which they are shown in FIG. I, and a close position in which they enclose two sections 12a and 12b of films to be connected.

L'enclume fixe est constituée par un plot métallique, en alliage léger par exemple, présentant une base 13 en forme de disque circulaire et une tête de section rectangulaire, dont la face terminale pourra avoir une surface de 21 x 30 mm dans le cas de traitement de films 35 mm. Cette face terminale (figure 2) sera avantageusement quadrillée par des stries de façon à former des picots de contact séparés : une telle forme augmente de façon importante l'effet des ultra-sons lors de la soudure. The fixed anvil is constituted by a metal stud, in light alloy for example, having a base 13 in the form of a circular disc and a head of rectangular section, the end face of which may have a surface of 21 × 30 mm in the case of 35 mm film processing. This end face (FIG. 2) will advantageously be squared by streaks so as to form separate contact pins: such a shape significantly increases the effect of ultrasound during welding.

Le passage de la section rectangulaire de la tête à la section circulaire de la base 13 doit s'effectuer de façon progressive, avec des rayons de courbure importants, pour éviter des concentrations de contraintes qui pourraient modifier les caractéristiques de la matière. Il n'est pas nécessaire que les raccordements s'effectuent de façon parabolique et on utilisera en général de simples arcs de cercle. The transition from the rectangular section of the head to the circular section of the base 13 must be carried out gradually, with large radii of curvature, to avoid concentrations of stresses which could modify the characteristics of the material. It is not necessary that the connections are made in a parabolic way and one will generally use simple arcs of a circle.

Une gorge 14 est ménagée autour de la base 13. Cette gorge sert à fixer l'enclume sur une mécanique extérieure non représentée, par exemple à l'aide de vis pointeaux 15. A groove 14 is formed around the base 13. This groove is used to fix the anvil to an external mechanism, not shown, for example using needle screws 15.

La position de cette gorge correspondra, lors du soudage, à un noeud de vibrations : la longueur de l'enclume sera choisie pour que sa face terminale striée corresponde au contraire à un ventre.The position of this groove will correspond, during welding, to a vibration node: the length of the anvil will be chosen so that its striated end face corresponds on the contrary to a belly.

Dans le plan médian de la tête est ménagée une fente 17 dans laquelle peut coulisser une languette 18 qu'un ressort 16 tend à repousser en saillie. Cette saillie doit évidemment être limitée par des moyens non représentés. In the median plane of the head is formed a slot 17 in which can slide a tongue 18 which a spring 16 tends to push back. This projection must obviously be limited by means not shown.

Le bloc générateur 11, communément dénommé "Sonotrode", peut être regardé comme constitué par un oscillateur piézo-électrique 20 placé entre un corps 21 muni d'un outil 22 et un amortisseur 23. Le corps 21 se présente sous forme d'un bloc cylindrique, généralement en alliage léger à base d'aluminium, dont la partie terminale tournée vers l'enclume est munie d'une gorgé 24 similaire à la gorge 14 et prévue pour recevoir des vis pointeaux 25 de fixation. La position de cette gorge correspondra encore à un noeud de vibrations. The generator block 11, commonly called "Sonotrode", can be viewed as constituted by a piezoelectric oscillator 20 placed between a body 21 provided with a tool 22 and a damper 23. The body 21 is in the form of a block cylindrical, generally made of light alloy based on aluminum, the end part of which faces the anvil is provided with a groove 24 similar to the groove 14 and designed to receive needle screws 25 for fixing. The position of this groove will still correspond to a vibration node.

L'outil 22 constitue l'organe qui entre en contact avec les tronçons à raccorder par soudage. Il peut être constitué en un matériau identique à celui du corps 21, et il est fixé au corps de façon rigide. The tool 22 constitutes the member which comes into contact with the sections to be connected by welding. It can be made of a material identical to that of the body 21, and it is fixed to the body rigidly.

Dans le mode de réalisation illustré, l'outil 22 porte une tige filetée 26 qui s'engage dans un trou borgne taraudé correspondant du corps. La base de l'outil est circulaire et sa partie supérieure a une section droite rectangulaire identique à celle de la tête de l'enclume 10. Comme dans le cas de l'enclume, le passage de la section circulaire à la section #ectangulaire s'effectue par des arcs de cercle de rayon important. In the illustrated embodiment, the tool 22 carries a threaded rod 26 which engages in a corresponding tapped blind hole in the body. The base of the tool is circular and its upper part has a rectangular cross section identical to that of the head of the anvil 10. As in the case of the anvil, the transition from the circular section to the #ectangular section s 'effect by circular arcs of large radius.

Comme le montre la figure 3, un dégagement 27 sur une des faces de la base terminale de l'outil reçoit une plaquette métallique 3P dont le rôle apparaîtra plus loin. As shown in Figure 3, a clearance 27 on one of the faces of the terminal base of the tool receives a metal plate 3P whose role will appear later.

Comme l'enclume 10, l'outil 22 est dimensionné de façon que sa face terminale se trouve en un ventre de vibrations ultra-sonores à la fréquence de travail choisie. Like the anvil 10, the tool 22 is dimensioned so that its end face is in a belly of ultrasonic vibrations at the chosen working frequency.

L'oscillateur piézo-électrique 20 est constitué, dans le mode de réalisation illustré, par un empilement de plusieurs pastilles 28 de céramique piézo-électrique, séparées par des rondelles métalliques 29, par exemple en cuivre recuit, qui débordent des pastilles. Les pastilles sont avantageusement montées électriquement en parallèle , ce qui permet d'obtenir une amplitude maximale d'oscillations,
L'oscillateur 20 est serré entre le corps 21 et l'amortisseur 23, constitué par un bloc cylindrique en métal, typiquement en acier. Cet amortisseur est per#cé d'un trou central de passage d'un boulon 30 qui se visse dans un trou fileté du corps 21. Les pastilles 28 et les rondelles 29 sont percées d'un trou de diamètre suffisant pour qu'une gaine 31 en plastique résistant, par exemple en polytétrafluoréthylène, puisse être interposée entre les boulons 30 et l'oscillateur 20.Lors du montage de l'amortisseur, le boulon 30 est serré à l'aide d'une clé permettant d'exercer un couple bien déterminé, typiquement 8 m.kg,d;e façon que les céramiques soient soumises à une pré-contrainte.The piezoelectric oscillator 20 is constituted, in the illustrated embodiment, by a stack of several pellets 28 of piezoelectric ceramic, separated by metal washers 29, for example made of annealed copper, which project beyond the pellets. The pads are advantageously mounted electrically in parallel, which makes it possible to obtain a maximum amplitude of oscillations,
The oscillator 20 is clamped between the body 21 and the damper 23, constituted by a cylindrical block of metal, typically of steel. This damper is pierced with a central hole for the passage of a bolt 30 which is screwed into a threaded hole in the body 21. The pads 28 and the washers 29 are pierced with a hole of sufficient diameter for a sheath 31 made of resistant plastic, for example polytetrafluoroethylene, can be interposed between the bolts 30 and the oscillator 20. When mounting the shock absorber, the bolt 30 is tightened using a wrench allowing to exert a torque well determined, typically 8 m.kg, so that the ceramics are subjected to a pre-stress.

A titre d'exemple, on peut indiquer que des résultats satisfaisants sont obtenus en utilisant comme oscillateur 4 pastilles de céramique piézo-électrique ayant un diamètre de 50 mm et une épaisseur de 6 mm, séparées les unes des autres, ainsi que du corps 21 et de 1 'amor- tisseur 23, par des rondelles en cuivre recuit. L'ensemble du bloc est constitué de façon que, la gorge 24 constituant un noeud de vibrations, un autre noeud se trouve à peu près au milieu de l'oscillateur. By way of example, it can be indicated that satisfactory results are obtained by using 4 piezoelectric ceramic pellets having a diameter of 50 mm and a thickness of 6 mm, separated from each other, as well as from the body, as an oscillator. and of the shock absorber 23, by annealed copper washers. The whole block is made up so that, the groove 24 constituting a vibration node, another node is located approximately in the middle of the oscillator.

Le corps 21 est muni de moyens de chauffage permettant de porter sa température et celle de l'outil 22 à une température déterminée, généralement proche de 500C. The body 21 is provided with heating means making it possible to bring its temperature and that of the tool 22 to a determined temperature, generally close to 500C.

Ces moyens sont constitués par une résistance chauffante 32 bobinée sur le corps et reliée à une source électrique
S . Un capteur de température 33 porté par une des faces de l'outil 22 fournit à la source S un signal de commande permettant de régler la température à la valeur convenable.These means consist of a heating resistor 32 wound on the body and connected to an electrical source
S. A temperature sensor 33 carried by one of the faces of the tool 22 supplies the source S with a control signal enabling the temperature to be adjusted to the appropriate value.

Pour maintenir les pastilles céramiques 28 à une température pour laquelle elles ont un bon rendement, des moyens de refroidissement forcé sont prévus. Dans le mode de réalisation montré en figure 1, ces moyens sont constitués par un ventilateur 34 dirigeant, sur les céramiques 28 et les rondelles 29 qui les séparent, un courant d'air frais. To maintain the ceramic pellets 28 at a temperature for which they have a good yield, forced cooling means are provided. In the embodiment shown in FIG. 1, these means consist of a fan 34 directing, on the ceramics 28 and the washers 29 which separate them, a stream of fresh air.

Le dispositif montré en figure 3 comporte de plus un organe de découpe d'adhésif, constitué par un contrecouteau 39 solidaire de l'enclume, presse contre la plaquette 38 par des ressorts 35. The device shown in FIG. 3 further comprises an adhesive cutting member, constituted by a counter knife 39 secured to the anvil, pressed against the plate 38 by springs 35.

Le fonctionnement du dispositif est le suivant. The operation of the device is as follows.

Initialement, l'enclume 10 et le bloc 11 sont écartés l'un de l'autre, comme indiqué sur la figure 1. Des moyens non représentés, tels que des galets, amènent les deux tronçons 12a et 12b à relier dans la position représentée en trait mixte en figure 1. Dans le cas envisagé à titre d'exemple, la queue d'un film et la tête du film suivant seront donc disposées bout à bout, séparées par la languette 18. Un second système mécanique, schématisé sur la figure 3 par deux rouleaux 36, avance alors, entre les deux films 12a et 12b, une bande d'adhésif 37. Un mécanisme de déplacement du bloc générateur ll , intervient alors, soulève le bloc par l'intermédiaire des vis pointeaux 25, et l'applique contre L'enclume avec une force déterminée, typiquement de 100 kg environ.Au cours de cette avance du bloc 11, une pastille de bande adhésive 37 est détachée par le contre-couteau 39. Les deux bouts de film et la pastille adhésive rectangulaire découpée se retrouvent ainsi prisonniers entre l'enclume 10 et l'outil 22 (figure 4), la languette 18 étant enfoncée dans la fente.Initially, the anvil 10 and the block 11 are separated from each other, as indicated in FIG. 1. Means not shown, such as rollers, bring the two sections 12a and 12b to be connected in the position shown in dashed lines in FIG. 1. In the case envisaged by way of example, the tail of a film and the head of the following film will therefore be arranged end to end, separated by the tongue 18. A second mechanical system, shown diagrammatically on the FIG. 3 by two rollers 36, then advances, between the two films 12a and 12b, a strip of adhesive 37. A mechanism for moving the generator block ll, then intervenes, lifts the block by means of the needle screws 25, and apply it against the anvil with a determined force, typically about 100 kg. During this advance of the block 11, a patch of adhesive tape 37 is detached by the counter knife 39. The two ends of film and the patch cut rectangular adhesive are thus trapped between the anvil 10 and the tool 22 (FIG. 4), the tongue 18 being pressed into the slot.

Avant cette première opération, l'organe chauf- fant 32 et le ventilateur 34 sont entrés en action, le déplacement n'intervenant qu'une fois que la température du corps et de l'outil a atteint la valeur choisie, typiquement 50 C. Before this first operation, the heating member 32 and the fan 34 are activated, the displacement only taking place once the temperature of the body and of the tool has reached the chosen value, typically 50 C.

Le générateur à fréquence ultra-sonore applique alors aux pastilles 28 une tension qui provoque la mise en oscillation du système. La base 13 de l'enclume 10 étant située à un noeud de vibrations, elle réfléchit les ondes ultra-sonores, ce qui. permet de lui donner une masse faible et d'éviter la nécessité, fréquente dans les dispositifs antérieurs, d'une enclume de masse très importante, fixée rigidement au bati de la machine. The ultrasonic frequency generator then applies a voltage to the pellets 28 which causes the system to oscillate. The base 13 of the anvil 10 being located at a vibration node, it reflects the ultrasonic waves, which. makes it possible to give it a low mass and to avoid the need, frequent in prior devices, for an anvil of very large mass, rigidly fixed to the frame of the machine.

La durée nécessaire à la soudure dépend notamment du type de film. Dans la majorité des cas, une durée de 0,5 seconde est suffisante. Pour certains films couleur très particuliers, la durée peut s'allonger jusqu'à atteindre 2,5 secondes. The time required for welding depends in particular on the type of film. In most cases, a duration of 0.5 seconds is sufficient. For some very specific color films, the duration may lengthen up to 2.5 seconds.

L'adhésif utilisé sera de nature classique :il comportera généralement une pellicule mince en "Mylar" (polyester à base d'éthylèneglycolet d'acide te'réphta1icp#) revêtue d'un adhésif à chaud. Une feuille supplémentaire de papier peut être prévue pour permettre la pré-impression, sur chaque pastille, d'un numéro servant à l'identification des films soudés. The adhesive used will be of a conventional nature: it will generally comprise a thin film of "Mylar" (polyester based on ethylene glycol of te'rephta1icp # acid) coated with a hot adhesive. An additional sheet of paper can be provided to allow the pre-printing, on each pad, of a number used to identify the welded films.

On voit que l'invention permet de réaliser entre films successifs des soudures de bonne qualité, sur toute la surface d'une pastille d'adhésif. Les soudages tiennent parfaitement dans les bains de développement et ont une résistance à la traction supérieure à la pellicule ellemême. La sonotrode et le générateur peuvent avoir l'un et l'autre des dimensions réduites du fait du rendement élevé. Le temps de soudage est faible ainsi que la puissance utilisée. Le montage à l'aide de vis pointeaux venant se loger en des gorges permet de mettre en place le dispositif de façon facile dans une machine complète et de le retirer en cas de besoin. Le dispositif est en conséquence parfaitement adapté au soudage bout à bout de films 35 mm dans des machines où il peut se substituer au système de thermocollage, utilisant une plaque chauffante à température élevée (généralement de l'ordre de 2000C) qui doit être appliquée sur l'adhésif sous pression et pendant une durée qui est généralement de deux à trois secondes. It can be seen that the invention makes it possible to produce good quality welds between successive films, over the entire surface of an adhesive patch. The welds fit perfectly in the development baths and have a higher tensile strength than the film itself. The sonotrode and the generator can both have reduced dimensions due to the high efficiency. The welding time is short as well as the power used. The assembly by means of needle screws coming to be housed in grooves makes it possible to set up the device easily in a complete machine and to remove it if necessary. The device is therefore perfectly suited for butt welding of 35 mm films in machines where it can replace the heat-bonding system, using a hot plate at high temperature (generally of the order of 2000C) which must be applied to the adhesive under pressure and for a period which is generally two to three seconds.

L'invention ne se limite évidemment pas au mode particulier de réalisation qui a été représenté et décrit à titre d'exemple, et il doit être entendu que la portée du présent brevet s'étend aux variantes restant dans le cadre des équivalences.  The invention is obviously not limited to the particular embodiment which has been shown and described by way of example, and it should be understood that the scope of this patent extends to the variants remaining within the framework of equivalences.

Claims (10)

REVENDICATIONS 1. Dispositif de soudage par ultra-sons permettant de raccorder bout à bout des tronçons de bande mince, notamment des films photographiques, comprenant une enclume et un bloc générateur comportant un oscillateur ultrasonore interposé entre un amortisseur et un corps, rap prochable de l'enclume pour enserrer avecbelle les deux tronçons, caractérisé en ce que le bloc est muni de moyens destinés à maintenir le corps à une température déterminée supérieure à la température ambiante et l'os- cillateur, de type piézo-électrique, à une température inférieure à celle du corps. 1. Ultrasonic welding device making it possible to connect end to end sections of thin strip, in particular photographic films, comprising an anvil and a generator block comprising an ultrasonic oscillator interposed between a damper and a body, rap next to the anvil to enclose with two beautiful sections, characterized in that the block is provided with means intended to maintain the body at a determined temperature above ambient temperature and the oscillator, of piezoelectric type, at a temperature below that of the body. 2. Dispositif suivant la revendication 1, caractérisé en ce que les moyens de maintien de température comportent une résistance de chauffage électrique enroulée sur le corps et des moyens de ventilation de l'oscillateur. 2. Device according to claim 1, characterized in that the temperature maintaining means comprise an electrical heating resistor wound on the body and means for ventilating the oscillator. 3. Dispositif suivant la revendication 2, caractérisé en ce que la résistance de chauffage électrique est alimentée par une source commandée par un capteur de température fixé sur le corps ou un outil solidaire du corps. 3. Device according to claim 2, characterized in that the electric heating resistance is supplied by a source controlled by a temperature sensor fixed on the body or a tool secured to the body. 4. Dispositif suivant la revendication 1, 2 ou 3, caractérisé en ce qu'une extrémité du corps, munie de moyens de support et de déplacement du bloc, est fixée à un outil d'appui prévu pour osciller en quart d'onde et en ce que l'extrémité opposée du corps est séparée d'un amortisseur par l'oscillateur constitué avantageusement par un empilement de pastilles céramiques prévues-pour être alimenté en parallèle par un générateur à fréquence ultra-sonore. 4. Device according to claim 1, 2 or 3, characterized in that one end of the body, provided with means for supporting and moving the block, is fixed to a support tool intended to oscillate in quarter wave and in that the opposite end of the body is separated from a damper by the oscillator advantageously constituted by a stack of ceramic pellets intended to be supplied in parallel by a generator at ultrasonic frequency. 5. Dispositif suivant la revendication 4, caractérisé en ce que le bloc est prévu pour présenter un noeud d'oscillations sensiblement au milieu de l'oscillateur. 5. Device according to claim 4, characterized in that the block is designed to present an oscillation node substantially in the middle of the oscillator. 6. Dispositif suivant une quelconque des revendications précédentes, caractérisé en ce que l'enclume porte une languette coulissant dans une fente placée dans le plan médian de l'enclume, repoussée en saillie par un ressort, et destinée à servir de butée au tronçon à rac corder. 6. Device according to any one of the preceding claims, characterized in that the anvil carries a sliding tongue in a slot placed in the median plane of the anvil, pushed in projecting by a spring, and intended to serve as a stop for the section to rac corder. 7. Dispositif suivant la revendication 6, caractérisé en ce que l'enclume est munie de moyens de support fixes à son extrémité opposée à celle qui fait face au bloc. 7. Device according to claim 6, characterized in that the anvil is provided with fixed support means at its end opposite to that which faces the block. 8. Dispositif suivant la revendication 4 ou 5, caractérisé en ce que le bloc et l'enclume comportent une partie terminale d'appui sur la bande à section droite rectangulaire et une partie éloignée de la bande à section droite circulaire, lesdites parties étant raccordées l'une à l'autre par des zones à rayon sensiblement constant. 8. Device according to claim 4 or 5, characterized in that the block and the anvil comprise an end portion for bearing on the strip with rectangular cross section and a part remote from the strip with circular cross section, said parts being connected to each other by zones with a substantially constant radius. 9. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend des moyens d'introduction des tronçons de bande en sens opposé entre l'enclume et le corps et des moyens d'insertion d'une bande adhésive dans une direction perpendiculaire à la direction d'insertion des tronçons. 9. Device according to any one of the preceding claims, characterized in that it comprises means for introducing the strip sections in the opposite direction between the anvil and the body and means for inserting an adhesive strip into a direction perpendicular to the direction of insertion of the sections. 10. Dispositif suivant la revendication 9, caractérisé en ce que l'enclume comporte des moyens de découpe d'une pastille de bande adhésive lors du rapprochement de l'enclume et du corps.  10. Device according to claim 9, characterized in that the anvil comprises means for cutting a patch of adhesive tape when the anvil and the body are brought together.
FR8002633A 1980-02-06 1980-02-06 Heated ultrasonic welding tool for joining photographic films - small enough for integration with other film processing apparatus Granted FR2474944A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8002633A FR2474944A1 (en) 1980-02-06 1980-02-06 Heated ultrasonic welding tool for joining photographic films - small enough for integration with other film processing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8002633A FR2474944A1 (en) 1980-02-06 1980-02-06 Heated ultrasonic welding tool for joining photographic films - small enough for integration with other film processing apparatus

Publications (2)

Publication Number Publication Date
FR2474944A1 true FR2474944A1 (en) 1981-08-07
FR2474944B1 FR2474944B1 (en) 1983-02-11

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FR8002633A Granted FR2474944A1 (en) 1980-02-06 1980-02-06 Heated ultrasonic welding tool for joining photographic films - small enough for integration with other film processing apparatus

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19857444A1 (en) * 1998-12-12 2000-06-15 Kuesters Eduard Maschf Ultrasonic forming of flat thermoplastic material by passing the material between a heated sonic horn and opposing tool
EP2033768A1 (en) * 2007-09-06 2009-03-11 Trüb AG Method for renewed connection of personalised passport pages and 2-up sheet manufactured according to this method
EP2327534A1 (en) * 2009-11-25 2011-06-01 Telsonic Holding AG Method and device for welding workpieces

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SU178659A1 (en) * А. В. Соколов, А. П. Насакин, Р. Б. Гибатулин , В. гвцев
US3321558A (en) * 1962-10-08 1967-05-23 Cavitron Ultrasonics Inc Ultrasonic heating method
US3331589A (en) * 1965-02-08 1967-07-18 Frederick G Hammitt Vibratory unit with seal
US3384283A (en) * 1964-10-16 1968-05-21 Axion Corp Vibratory wire bonding method and apparatus
US3454450A (en) * 1966-01-03 1969-07-08 Nat Distillers Chem Corp Plastic sealing apparatus using combined heat and ultra-sonic energy
US3468731A (en) * 1966-07-01 1969-09-23 Branson Instr Method and apparatus for sonically sealing the end portion of thermoplastic tubular containers
US3647599A (en) * 1969-06-16 1972-03-07 Eastman Kodak Co Ultrasonic film splicing apparatus
US3790738A (en) * 1972-05-30 1974-02-05 Unitek Corp Pulsed heat eutectic bonder
US3880699A (en) * 1973-09-07 1975-04-29 Noritsu Koki Co Ltd Automatic adhesive tape feeding device
US3986919A (en) * 1975-05-12 1976-10-19 Eastman Kodak Company Splice station for a heat seal film splicer

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SU178659A1 (en) * А. В. Соколов, А. П. Насакин, Р. Б. Гибатулин , В. гвцев
US3321558A (en) * 1962-10-08 1967-05-23 Cavitron Ultrasonics Inc Ultrasonic heating method
US3384283A (en) * 1964-10-16 1968-05-21 Axion Corp Vibratory wire bonding method and apparatus
US3331589A (en) * 1965-02-08 1967-07-18 Frederick G Hammitt Vibratory unit with seal
US3454450A (en) * 1966-01-03 1969-07-08 Nat Distillers Chem Corp Plastic sealing apparatus using combined heat and ultra-sonic energy
US3468731A (en) * 1966-07-01 1969-09-23 Branson Instr Method and apparatus for sonically sealing the end portion of thermoplastic tubular containers
US3647599A (en) * 1969-06-16 1972-03-07 Eastman Kodak Co Ultrasonic film splicing apparatus
US3790738A (en) * 1972-05-30 1974-02-05 Unitek Corp Pulsed heat eutectic bonder
US3880699A (en) * 1973-09-07 1975-04-29 Noritsu Koki Co Ltd Automatic adhesive tape feeding device
US3986919A (en) * 1975-05-12 1976-10-19 Eastman Kodak Company Splice station for a heat seal film splicer

Non-Patent Citations (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19857444A1 (en) * 1998-12-12 2000-06-15 Kuesters Eduard Maschf Ultrasonic forming of flat thermoplastic material by passing the material between a heated sonic horn and opposing tool
EP2033768A1 (en) * 2007-09-06 2009-03-11 Trüb AG Method for renewed connection of personalised passport pages and 2-up sheet manufactured according to this method
EP2327534A1 (en) * 2009-11-25 2011-06-01 Telsonic Holding AG Method and device for welding workpieces

Also Published As

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