FR2488828A1 - METHOD AND APPARATUS FOR WELDING SHEETS OF THERMOPLASTIC MATERIAL, AS WELL AS HOT CORNER USED FOR SUCH WELDING - Google Patents

METHOD AND APPARATUS FOR WELDING SHEETS OF THERMOPLASTIC MATERIAL, AS WELL AS HOT CORNER USED FOR SUCH WELDING Download PDF

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Publication number
FR2488828A1
FR2488828A1 FR8115938A FR8115938A FR2488828A1 FR 2488828 A1 FR2488828 A1 FR 2488828A1 FR 8115938 A FR8115938 A FR 8115938A FR 8115938 A FR8115938 A FR 8115938A FR 2488828 A1 FR2488828 A1 FR 2488828A1
Authority
FR
France
Prior art keywords
corner
sheets
thermoplastic material
hot
edges
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Withdrawn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
FR8115938A
Other languages
French (fr)
Inventor
Friedrich Struve
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.)
Gundle Holdings Pty Ltd
Original Assignee
Gundle Holdings Pty Ltd
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 Gundle Holdings Pty Ltd filed Critical Gundle Holdings Pty Ltd
Publication of FR2488828A1 publication Critical patent/FR2488828A1/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Withdrawn legal-status Critical Current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
    • B29C65/40—Applying molten plastics, e.g. hot melt
    • B29C65/42—Applying molten plastics, e.g. hot melt between pre-assembled parts
    • 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
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/224—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip being a resistive ribbon, a resistive band or a resistive strip
    • 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
    • B29C65/26—Hot fluid
    • 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
    • B29C65/28—Flame or combustible 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
    • 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
    • B29C65/32—Induction
    • 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
    • B29C65/52—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 way of applying the adhesive
    • B29C65/524—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 way of applying the adhesive by applying the adhesive from an outlet device in contact with, or almost in contact with, the surface of the part 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
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—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
    • B29C66/9161—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
    • B29C66/91651—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 by controlling or regulating the heat generated by Joule heating or induction heating
    • 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
    • B29C66/91651—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 by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91655—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 by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the current intensity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/228—Heated wire resistive ribbon, resistive band or resistive strip characterised by the means for electrically connecting the ends of said heated wire, resistive ribbon, resistive band or resistive strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—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
    • B29C66/91651—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 by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91653—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 by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the voltage, i.e. the electric potential difference or electric tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/953—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the humidity
    • B29C66/9532—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the humidity of the parts to be joined, i.e. taking the humidity of the parts to be joined into account
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

LA PRESENTE INVENTION CONCERNE UN PROCEDE ET UN APPAREIL POUR SOUDER DES FEUILLES EN MATERIAU THERMOPLASTIQUE PAR PASSAGE D'UN COIN CHAUD 5 ENTRE LES BORDS 3, 4 EN RECOUVREMENT DES FEUILLES DE MANIERE A FAIRE FONDRE LES SURFACES 1, 2 DE CES FEUILLES EN CONTACT AVEC LE COIN 5, AVEC DE PREFERENCE APPORT D'UNE PETITE QUANTITE DE MATERIAU THERMOPLASTIQUE FONDU ENTRE LES BORDS, CES DERNIERS ETANT ENSUITE PRESSES L'UN SUR L'AUTRE, LE MATERIAU THERMOPLASTIQUE AJOUTE REMPLISSANT LES VIDES EVENTUELS ET FAUX PLIS.THE PRESENT INVENTION RELATES TO A METHOD AND APPARATUS FOR WELDING SHEETS OF THERMOPLASTIC MATERIAL BY PASSING A HOT CORNER 5 BETWEEN THE EDGES 3, 4 FOR COVERING THE SHEETS TO MELT SURFACES 1, 2 OF SUCH SHEETS IN CONTACT WITH CORNER 5, PREFERABLY PROVIDING A SMALL QUANTITY OF THERMOPLASTIC MATERIAL MELTED BETWEEN THE EDGES, THESE LATTERS THEN BEING PRESSED OVER ONE ANOTHER, THE THERMOPLASTIC MATERIAL ADDED FILLING THE EMPTY FAUX AND WRINKLES.

Description

-1- L'invention concerne un procédé pour souder un matériau-1- The invention relates to a method for welding a material

thermoplastique, notamment des feuilles ou  thermoplastic, especially sheets or

panneaux en matériau thermoplastique, ainsi que l'ap-  panels in thermoplastic material, as well as the ap-

Dareil de mise en oeuvre de ce procédé.  Apparatus for implementing this process.

Lorsqu'on soude en recouvrement des feuilles ou panneaux en matériau thermoplastique, les bords en recouvrement ou surfaces en regard de ces feuilles ou  When welding in overlap of sheets or panels of thermoplastic material, the overlapping edges or facing surfaces of these sheets or

Danneaux sont généralement soudés selon l'un des pro-  Rings are usually welded according to one of the pro-

cédés suivants:following sales:

(a) les surfaces sont chauffées à une tempéra-  (a) the surfaces are heated to a temperature

ture supérieure au point de fusion par un coin métal-  ture higher than the melting point by a metal wedge-

lique chaud que l'on déplace sur ces surfaces. Les surfaces fondues sont alors pressées l'une sur l'autre jusqu'à ce que la température descende au-dessous du  hot lique that we move on these surfaces. The molten surfaces are then pressed one on the other until the temperature drops below the

point de fusion et que le matériau se soit solidifié.  melting point and the material has solidified.

(b) les surfaces sont chauffées à une tempéra-  (b) the surfaces are heated to a temperature

ture prédéterminée, généralement inférieure au point  predetermined size, generally less than the point

de fusion, à l'aide d'un dispositif de préchauffage.  melting, using a preheating device.

Pour assurer la fusion des feuilles qui convient au  To ensure the sheet fusion that is suitable for

soudage, un apport de chaleur supplémentaire est four-  welding, additional heat is supplied

ni par un matériau thermoplastique fondu, dont la  nor by a molten thermoplastic material, the

quantité et la température sont suffisantes pour fon-  quantity and temperature are sufficient to operate

dre la surface des deux feuilles à souder. Les surfa-  dre the surface of the two sheets to be welded. The surfa-

ces sont alors pressées l'une sur l'autre, le soudage se faisant lorsque le matériau atteint une température  these are then pressed one on the other, the welding being done when the material reaches a temperature

inférieure à son point de fusion.below its melting point.

Dans les deux cas, le chauffage et/ou le pré-  In both cases, heating and / or pre-

chauffage est assuré de manière connue; (i) soit par un coin métallique chauffé par conduction, la source de chaleur étant généralement un élément électrique, une flamme directe ou un gaz chaud,  heating is provided in a known manner; (i) either by a metallic corner heated by conduction, the heat source generally being an electric element, a direct flame or a hot gas,

(ii) soit par un jet de gaz chaud, par exem-  (ii) either by a jet of hot gas, for example-

ple de l'air chaudchauffé généralement par un élément -2- électrique ou une flamme, (iii) soit par rayonnement, généralement dans  of hot air generally heated by an electrical element or a flame, (iii) either by radiation, generally in

la partie infrarouge du spectre, mais aussi sur d'au-  the infrared part of the spectrum, but also on other

tres longueurs d'onde appropriées.very suitable wavelengths.

Pour que la température de soudage soit cons- tante dans les cas (ii) et (iii), il est nécessaire de mesurer la température des feuilles thermoplastiques à souder et de faire varier l'apport de chaleur pour compenser les variations de température. La mesure de  In order for the welding temperature to be constant in cases (ii) and (iii), it is necessary to measure the temperature of the thermoplastic sheets to be welded and to vary the heat input to compensate for temperature variations. The measure of

la temn-érature ne tient toutefois pas compte de fac-  however, the temperature does not take into account

teurs tels que l'humidité des feuilles qui nécessite un apport de chaleur supplémentaire pour vaporisation, de sorte que la température de surface est plus faible  such as the humidity of the leaves which requires additional heat for vaporization, so that the surface temperature is lower

Gue la température requise.Gue the required temperature.

Pour que la température de soudage soit cons-  To keep the welding temperature

tante lorsque le coin chaud est en contact avec les feuilles dans les cas (a) et (i), il suffit de mesurer la température du coin, le plus près possible de la surface de travail de ce coin, et de compenser les variations de température par réglage de l'apport de chaleur. Hîais, le délai introduit pour que la chaleur soit amenée par conduction au coin peut se traduire  aunt when the hot corner is in contact with the sheets in cases (a) and (i), it is sufficient to measure the temperature of the corner, as close as possible to the work surface of this corner, and to compensate for variations in temperature by adjusting the heat supply. Hate, the delay introduced for the heat to be brought by conduction to the corner can translate

Dar une mauvaise soudure.Dar a bad weld.

Le procédé (a) pose un autre problème lorsque la liaison doit être mécaniquement robuste et étanche aux fuites. Si les bords des feuilles à souder ne sont pas parfaitement plats, le matériau forme de petites  Method (a) poses another problem when the connection must be mechanically robust and leak-tight. If the edges of the sheets to be welded are not perfectly flat, the material forms small

ondulations à l'avant du coin de soudage. Ces ondula-  corrugations at the front of the welding corner. These wavy-

tions peuvent alors passer au-dessus du coin à la ma-  tions can then pass over the corner at the ma-

nière d'un faux pli qui n'est donc pas soudé, faux pli  of a crease that is not welded, crease

par lequel un fluide peut passer.through which a fluid can pass.

La présente invention a pour objectif un pro-  The object of the present invention is to provide a

cédé perfectionné et un appareil pour souder les  ceded perfected and a device for welding

feuilles en matériau thermoplastiaue.  sheets of thermoplastic material.

-3- Selon le procédé conforme à l'invention: (i) on place les feuilles à souder de telle sorte qu'elles soient sensiblement adjacentes et que leurs bords adjacents soient en recouvrement, (ii) on déplace un coin chaud entre les bords  -3- According to the method according to the invention: (i) the sheets to be welded are placed so that they are substantially adjacent and their adjacent edges are overlapped, (ii) a hot wedge is moved between the edges

en recouvrement, en contact avec les surfaces adjacen-  overlapping, in contact with adjacent surfaces

tes des deux feuilles, la température du coin étant suffisante pour fondre les deux surfaces, (iii) on apporte une certaine quantité de matériau thermoplastique fondu entre les bords en recouvrement, et (iv) on presse les bords en recouvrement l'un sur l'autre en les laissant se refroidir, les surfaces étant ainsi presque entièrement liées par le matériau thermoplastique des feuilles, et les vides éventuels  of the two sheets, the temperature of the corner being sufficient to melt the two surfaces, (iii) a certain quantity of molten thermoplastic material is brought between the overlapped edges, and (iv) the overlapped edges are pressed one on the other by allowing them to cool, the surfaces thus being almost entirely bound by the thermoplastic material of the sheets, and any voids

ou faux plis étant remplis par le matériau thermo-  or creases being filled with the thermo-material

plastique ajouté.plastic added.

Conformément à l'invention, le matériau thermo-  According to the invention, the thermo-material

plastique d'apport est ajouté entre les bords en recou-  filler plastic is added between the edges

vrement en une position pratiquement adjacente à la  in a position practically adjacent to the

partie des surfaces fondue par le coin chaud.  part of the surfaces melted by the hot corner.

Selon un deuxième mode de réalisation conforme à l'invention, le coin chaud utilisé pour souder les bords en recouvrement des feuilles thermoplastiques  According to a second embodiment in accordance with the invention, the hot wedge used to weld the overlapping edges of the thermoplastic sheets

se compose d'un coin en matériau approprié et de mo-  consists of a corner of suitable material and mo-

yens pour chauffer ce coin, lesquels se présentent sous la forme d'une bobine d'induction contrôlée ou  yen to heat this corner, which are in the form of a controlled induction coil or

de tout élément analogue.any analogous element.

Selon un troisième mode de réalisation conforme à l'invention, le coin chaud utilisé pour souder les bords en recouvrement des feuilles thermoplastiques se  According to a third embodiment in accordance with the invention, the hot wedge used to weld the overlapping edges of the thermoplastic sheets is

compose d'un coin en matériau approprié et d'un dis-  consists of a corner of suitable material and a

positif de chauffage par résistance de ce coin, avec des moyens permettant de faire passer un courant basse -4-  positive resistance heating of this corner, with means for passing a low current -4-

tension de forte intensité dans le coin.  high intensity voltage in the corner.

- Conformément à l'invention, les coins des deu-  - In accordance with the invention, the corners of the two

xième et troisième mode de réalisation comportent un  tenth and third embodiments include a

dispositif de mesure de température permettant de con-  temperature measurement device for

tr8ler le dispositif de chauffage du coin. D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la  tr8ler the corner heater. Other characteristics and advantages of the present invention will appear on reading the

description détaillée qui va suivre et en regard des  detailed description which will follow and next to

dessins annexés donnés à titre d'exemple non limitatifs qui représentent: Figure 1, une vue schématique en élévation  attached drawings given by way of nonlimiting example which represent: FIG. 1, a schematic elevation view

de feuilles en matériau thermoplastique en recouvre-  sheets of thermoplastic material

ment, soudées par l'intermédiaire d'un coin, conformé-  ment, welded through a wedge,

ment au premier mode de réalisation; 15. Figure 2, une vue schématique en élévation  ment to the first embodiment; 15. Figure 2, a schematic elevational view

de feuilles en matériau thermoplastique en recouvre-  sheets of thermoplastic material

ment, soudées par l'intermédiaire d'un coin, conformé-  ment, welded through a wedge,

ment au deuxième mode de réalisation; Figure 3, une vue schématique en élévation des bords en recouvrement de feuilles thermoplastiques  ment to the second embodiment; Figure 3, a schematic elevation view of the overlapping edges of thermoplastic sheets

soudées à l'aide d'un apport de matériau thermoplasti-  welded using a thermoplastic material

que; et Figure 4, une vue en élévation de l'extrémité  than; and Figure 4, an elevational view of the end

de deux feuilles en matériau thermoplastique en recou-  of two sheets of thermoplastic material covered

vrement, dont les bords sont soudés à l'aide d'un coin  clearly, the edges of which are welded using a wedge

chaud et d'un apport de matériau thermoplastique.  hot and a contribution of thermoplastic material.

Dans le premier mode de réalisation représenté sur la Figure 1, les surfaces adjacentes 1 et 2 des  In the first embodiment shown in Figure 1, the adjacent surfaces 1 and 2 of the

bords en recouvrement 5 et 4 de deux feuilles en maté-  overlapping edges 5 and 4 of two sheets of material

riau thermoplastique sont soudées à l'aide d'un coin chaud 5. Le coin chaud 5 est chauffé par une bobine  thermoplastic riau are welded using a hot corner 5. The hot corner 5 is heated by a coil

d'induction extérieure 6.external induction 6.

Le coin chaud est déplacé entre les surfaces 1 et 2, dans le sens indiqué par la flèche X. A mesure -5- qu'il se déplace, il provoque la fusion des surfaces Dr4citées qui sont ensuite pressées l'une sur l'autre par un galet 7. Les surfaces fondues 1 et 2 sont ainsi amenées en contact, et le matériau fondu se solidifie lorsque sa température descend au-dessous de son point de fusion, les feuiPes étant ainsi soudées l'une à l'autre. Pour contrôler la température du coin chaud , on place dans ce dernier un dispositif de mesure  The hot corner is moved between surfaces 1 and 2, in the direction indicated by the arrow X. As it moves, it causes the fusion of the Dr4cited surfaces which are then pressed one on the other by a roller 7. The molten surfaces 1 and 2 are thus brought into contact, and the molten material solidifies when its temperature drops below its melting point, the sheets being thus welded to one another. To control the temperature of the hot corner, a measuring device is placed in the latter

de température 8, aussi près que possible de l'extré-  temperature 8, as close as possible to the end

mité pointue 9 de ce coin. Le dispositif 8 est raccor-  pointed mite 9 from this corner. The device 8 is connected

dé à un circuit de contrôle (non représenté) qui contrôle l'alimentation de la bobine d'induction 6 de  dice to a control circuit (not shown) which controls the supply of the induction coil 6 of

chauffage du coin.corner heating.

Dans le deuxième mode de réalisation représen-  In the second embodiment represented

té Figure 2, les deux feuilles thermoplastiques sont soudées comme il vient d'être décrit, mais on utilise à cette fin un coin chaud différent. Le coin chaud 10 de cette deuxième version a la forme d'une coque 11 en matériau résistant approprié. Les extrémités 12 et 13 de la coque 11 sont raccordées à des conducteurs électriques 14 et 15. Un courant basse tension de forte intensité est envoyé dans le coin, par l'intermédiaire des conducteurs précités, ce qui porte ce coin à la  tee Figure 2, the two thermoplastic sheets are welded as just described, but a different hot corner is used for this purpose. The hot corner 10 of this second version has the shape of a shell 11 of suitable resistant material. The ends 12 and 13 of the shell 11 are connected to electrical conductors 14 and 15. A low current of high intensity is sent to the corner, via the aforementioned conductors, which brings this corner to the

température appropriée.appropriate temperature.

Comme dans le mode de réalisation précédent, un dispositif de mesure de température 16 est placé à proximité de l'extrémité 17 du coin. Le dispositif 16 contrôle de manière connue le courant qui circule dans le coin, et contrôle de la sorte la température de ce coin. Dans les deux modes de réalisation qui viennent d'être décrits, on peut introduire une petite quantité de matériau thermoplastiaue fondu entre les surfaces 1 et. , lorsque ces surfaces ont été fondues par le coin, mais avant qu'elles soient Pressées l'une sur l'autre par le galet 7. L'introduction peut se faire à l'aide d'une buse 18 Dlacée à proximité de la pointe ou bord arrière 19 du coin 20, comme on l'a représenté Figure T, Lorsque le galet presse les deux feuilles l'une sur l'autre, les surfaces fondues 1 et 2 sont mises en  As in the previous embodiment, a temperature measuring device 16 is placed near the end 17 of the corner. The device 16 controls in a known manner the current flowing in the corner, and thus controls the temperature of this corner. In the two embodiments which have just been described, a small amount of molten thermoplastic material can be introduced between the surfaces 1 and. , when these surfaces have been melted by the corner, but before they are pressed one on the other by the roller 7. The introduction can be done using a nozzle 18 Dlacé near the tip or rear edge 19 of the corner 20, as shown in Figure T, When the roller presses the two sheets one on the other, the melted surfaces 1 and 2 are brought into

contact comme il a été décrit. Le matériau thermoDlas-  contact as described. The thermoDlas- material

tique fondu ajouté se rassemble dans lés vides ou faux plis éventuels, là ou les surfaces ne sont pas soudées,  added molten tick gathers in possible voids or creases, where the surfaces are not welded,

ce qui assure la continuité et la perfection de la sou-  which ensures continuity and perfection of support

dure. On a illustré Figure 3 l'une des causes de la  tough. One of the causes of the

formation de faux plis. Lorsque les deux feuilles pas-  formation of creases. When the two sheets pass-

sent sous le galet 7, il arrive souvent qu'une petite ondulation se forme dans l'une des feuilles devant ce galet 7. Ces ondulations peuvent passer sous le galet et former un faux pli 21. Le matériau thermoplastique d'apport 22 se rassemble dans ces faux plis et les  feels under the roller 7, it often happens that a small corrugation forms in one of the sheets in front of this roller 7. These corrugations can pass under the roller and form a false fold 21. The thermoplastic filler material 22 collects in these wrinkles and

rend étanches comme il a été décrit.  seals as described.

Une variante de ce mode de réalisation est illustrée Figure 4. Dans ce cas, au lieu d'introduire le matériau thermoplastique d'apport entre la pointe du coin et le galet,on l'introduit latéralement à ces deux dispositifs. A mesure Que le galet presse les  A variant of this embodiment is illustrated in Figure 4. In this case, instead of introducing the thermoplastic filler material between the tip of the corner and the roller, it is introduced laterally to these two devices. As the roller presses

surfaces l'une sur l'autre, le matériau thermoplasti-  surfaces one on top of the other, the thermoplastic material

aue d'aDport se rassemble sous forme d'un bourirlet 23 latéral aux surfaces soudées, ce qui bouche les fentes ou vides pouvant se présenter. On remarquera que la chaleur du matériau thermoplastique d'apport  aue aDport is assembled in the form of a lateral bead 23 with welded surfaces, which closes the slots or voids which may arise. It will be noted that the heat of the thermoplastic filler material

fait fondre les surfaces des feuilles par un mécanis-  melts the leaf surfaces by a mechanical

me de soudage analogue.analog welding me.

On vient donc de décrire un nouveau procédé de  We have therefore just described a new method of

soudage des bords en recouvrement de feuilles en maté-  welding of overlapping edges of material sheets

-7- riau thermoplasticue. La liaison obtenue est efficace, étanche et on utilise à cette fin des coins dont la température peut être contrôlée aisément et avec une assez grande précision. D'autres variantes peuvent être envisagées dans le cadre de l'invention. -8-  -7- thermoplastic line. The connection obtained is effective, waterproof and for this purpose corners are used, the temperature of which can be easily controlled and with fairly high precision. Other variants can be envisaged in the context of the invention. -8-

Claims (2)

REVENDICATIONS ) Procédé pour souder entre elles des feuil- les en matériau thermoplastique, caractérisé en ce au'il consiste: (i) à placer deux feuilles à souder (3,4) de telle sorte qu'elles soient sensiblement adjacentes et nue leurs bords adjacents soient en recouvrement, (ii) à déplacer un coin chaud (5) entre les bords en recouvrement, en contact avec les surfaces adjacentes (1,2) des deux feuilles, la température du coin étant suffisante nour faire fondre les deux sur- faces, (iii) à apporter une certaine quantité de matériau thermoplastique fondu entre les bords en recouvrerient, et (iv) à presser les bords en recouvrement l'un sur l'autre en les laissant se refroidir, les surfaces étant ainsi presque entièrement liées par le matériau thermoplastique des feuilles et les vides éventuels et faux plis étant remplis par le matériau thermoplasti- que ajouté. ) Procédé selon la revendication 1, caracté- risé en ce que le matériau thermoplastique d'apport est ajouté entre les bords en recouvrement en une po- sition pratiquement adjacente à la partie des surfaces fondue par le coin chaud (5).CLAIMS) Method for welding together sheets of thermoplastic material, characterized in that it consists of: (i) placing two sheets to be welded (3,4) so that they are substantially adjacent and bare their edges adjacent are overlapped, (ii) moving a hot wedge (5) between the overlapped edges, in contact with the adjacent surfaces (1,2) of the two sheets, the temperature of the corner being sufficient to melt the two overlays. faces, (iii) bringing a certain amount of molten thermoplastic material between the overlapping edges, and (iv) pressing the overlapping edges one on the other, allowing them to cool, the surfaces thus being almost entirely bonded by the thermoplastic material of the sheets and any voids and creases being filled with the added thermoplastic material. ) Method according to claim 1, characterized in that the thermoplastic filler material is added between the overlapping edges in a position practically adjacent to the part of the surfaces melted by the hot wedge (5). 3 ) Coin chaud utilisé pour souder les bords en recouvrement de feuilles en matériau thermoplastique, caractérisé en ce qu'il se compose d'un coin (5) en matériau a'nronrié et de moyens pour chauffer ce coin, lesquels moyens se présentent sous la forme d'une  3) hot corner used to weld the overlapping edges of sheets of thermoplastic material, characterized in that it consists of a corner (5) of air-tight material and means for heating this corner, which means are provided the shape of a bobine d'induction contrôlée (6).controlled induction coil (6). -9- 4 ) Coin chaud utilisé pour souder les bords  -9- 4) Hot corner used to weld the edges en recouvrement de feuilles en matériau thermoplasti-  covering sheets of thermoplastic material que, caractérisé en ce qu'il se compose d'un coin (5) en matériau approprié et de moyens permettant de faire passer dans le coin (10) un courant basse tension de  that, characterized in that it consists of a corner (5) of suitable material and of means allowing a low voltage current to pass through the corner (10) forte in7ensité.high density. ) Coin chaud selon l'une des revendications   ) Hot corner according to one of the claims 3 et 4, caractérisé en ce quail comporte un dispositif  3 and 4, characterized in that it includes a device de mesure de température (8,16) pour contrôler les mo-  temperature measurement (8,16) to control the mo- yens de chauffage du coin (5,10).yen for corner heating (5.10). 6 ) Appareil comportant un coin chaud (20)  6) Device comprising a hot corner (20) selon l'une des revendications 3 à 5, caractérisé en  according to one of claims 3 to 5, characterized in ce eu'il comporte des moyens (18) pour introduire du matériau thermoplastioue fondu supplémentaire entre les bords en recouvrement après passage du coin chaud, ainsi que des moyens (7) pour presser les bords en recouvrement l'un sur l'autre après introduction du  this has means (18) for introducing additional molten thermoplastic material between the overlapped edges after passage of the hot corner, as well as means (7) for pressing the overlapped edges on each other after introduction of matériau thermoplastique fondu.molten thermoplastic material.
FR8115938A 1980-08-22 1981-08-19 METHOD AND APPARATUS FOR WELDING SHEETS OF THERMOPLASTIC MATERIAL, AS WELL AS HOT CORNER USED FOR SUCH WELDING Withdrawn FR2488828A1 (en)

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AU (1) AU7315781A (en)
BR (1) BR8105241A (en)
DE (1) DE3132273A1 (en)
FR (1) FR2488828A1 (en)
GB (1) GB2082500A (en)
IL (1) IL63415A0 (en)
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FR3083733A1 (en) * 2018-07-16 2020-01-17 Arkema France Method of induction welding of parts based on thermoplastic material
FR3083732A1 (en) * 2018-07-16 2020-01-17 Arkema France Method for welding parts based on thermoplastic material
FR3083734A1 (en) * 2018-07-16 2020-01-17 Arkema France METHOD FOR INDUCTION WELDING OF PARTS BASED ON THERMOPLASTIC MATERIAL
WO2020016514A1 (en) 2018-07-16 2020-01-23 Arkema France Method for welding parts made of thermoplastic material
US11077624B2 (en) 2018-06-20 2021-08-03 Spirit Aerosystems, Inc. System and method for welding thermoplastic components to create composite structure

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DK68989A (en) * 1989-02-15 1990-08-16 Hans Flinker Bisgaard PROCEDURE AND APPARATUS FOR COMPOSITIONING OF FORMULA FILM COATS
US5134000A (en) * 1989-08-10 1992-07-28 Shaw Industries Ltd. Heat shrinkable protective sheets and methods for their manufacture
FI903912A0 (en) * 1989-08-10 1990-08-07 Shaw Ind Ltd KRYMPBART TAECKE OCH FOERFARANDE FOER FRAMSTAELLNING AV DET.
JPH04364926A (en) * 1991-06-11 1992-12-17 Adoheya Sansho Kk Method for bonding waterproof sheet and waterproof cloth
JPH06327096A (en) * 1993-11-16 1994-11-25 Sony Corp Electroacoustic transducer
DE19741686B4 (en) * 1997-09-18 2005-10-13 Andreas Schmidt Device and method for joining, in particular hot wedge overlap welding, of plastic sheets
US20090032184A1 (en) * 2005-04-08 2009-02-05 Ali Yousefpour Resistance Welding of Thermoplastics
ITMI20081418A1 (en) * 2008-07-30 2010-01-31 Sestese Off Mec WELDING DEVICE FOR PASSING FOR A PLASTIC STRAP AND ITS WELDING METHOD.
CN104889613B (en) * 2015-05-15 2017-03-15 江苏金晟元特种阀门股份有限公司 Intelligent welding technique
FR3108553B1 (en) * 2020-03-24 2023-09-01 Arkema France Process for welding parts based on thermoplastic material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11077624B2 (en) 2018-06-20 2021-08-03 Spirit Aerosystems, Inc. System and method for welding thermoplastic components to create composite structure
FR3083733A1 (en) * 2018-07-16 2020-01-17 Arkema France Method of induction welding of parts based on thermoplastic material
FR3083732A1 (en) * 2018-07-16 2020-01-17 Arkema France Method for welding parts based on thermoplastic material
FR3083734A1 (en) * 2018-07-16 2020-01-17 Arkema France METHOD FOR INDUCTION WELDING OF PARTS BASED ON THERMOPLASTIC MATERIAL
WO2020016514A1 (en) 2018-07-16 2020-01-23 Arkema France Method for welding parts made of thermoplastic material
AU2019304113B2 (en) * 2018-07-16 2021-08-12 Arkema France Method for welding parts made of thermoplastic material
US11685125B2 (en) 2018-07-16 2023-06-27 Arkema France Method for welding parts made of thermoplastic material

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IT1138164B (en) 1986-09-17
IT8123596A0 (en) 1981-08-21
JPS5772814A (en) 1982-05-07
NL8103851A (en) 1982-03-16
DE3132273A1 (en) 1982-04-01
IL63415A0 (en) 1981-10-30
AU7315781A (en) 1982-02-25
GB2082500A (en) 1982-03-10
BR8105241A (en) 1982-04-27

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