EP0095498A1 - Soudage thermique de materiaux thermoplastiques - Google Patents

Soudage thermique de materiaux thermoplastiques

Info

Publication number
EP0095498A1
EP0095498A1 EP83900248A EP83900248A EP0095498A1 EP 0095498 A1 EP0095498 A1 EP 0095498A1 EP 83900248 A EP83900248 A EP 83900248A EP 83900248 A EP83900248 A EP 83900248A EP 0095498 A1 EP0095498 A1 EP 0095498A1
Authority
EP
European Patent Office
Prior art keywords
plies
ribbon
welding apparatus
weld
joining
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Withdrawn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
EP83900248A
Other languages
German (de)
English (en)
Inventor
William Edmund Young
Ernst Walter Gerber
William Richard Pasco
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0095498A1 publication Critical patent/EP0095498A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1448—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface radiating the edges of the parts to be joined, e.g. for curing a layer of adhesive placed between two flat parts to be joined, e.g. for making CDs or DVDs
    • 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"
    • B29C65/2007—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" characterised by the type of welding mirror
    • B29C65/203—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" characterised by the type of welding mirror being several single mirrors, e.g. not mounted on the same tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—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"
    • B29C65/2046—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" using a welding mirror which also cuts the parts to be joined, e.g. for sterile welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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"
    • B29C65/2053—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" characterised by special ways of bringing the welding mirrors into position
    • B29C65/2061—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" characterised by special ways of bringing the welding mirrors into position by sliding
    • B29C65/2069—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" characterised by special ways of bringing the welding mirrors into position by sliding with an angle with respect to the plane comprising the parts to be joined
    • B29C65/2076—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" characterised by special ways of bringing the welding mirrors into position by sliding with an angle with respect to the plane comprising the parts to be joined perpendicularly to the plane comprising 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
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/229—Heated wire resistive ribbon, resistive band or resistive strip characterised by the means for tensioning 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
    • 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
    • B29C65/7433—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 the tool being a wire
    • 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
    • B29C65/7439—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 for continuously and longitudinally welding and severing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—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
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/137—Beaded-edge joints or bead seals
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7371—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 state of the material of the parts to be joined oriented or heat-shrinkable
    • 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
    • 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
    • B29C66/81815—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 clamps
    • 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
    • B29C66/8187—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 electrical insulating constructional aspects
    • B29C66/81871—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 electrical insulating constructional aspects of 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8227—Transmission mechanisms using springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83433—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts the contact angle between said rollers, cylinders or drums and said bands or belts being a non-zero angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B29C66/8432—Machines for making separate joints at the same time mounted in parallel or in series
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7371—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 state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—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 state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7371—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 state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—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 state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • B29C66/73713—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 state of the material of the parts to be joined oriented or heat-shrinkable oriented bi-axially or multi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81419—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled and flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8223—Worm or spindle mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/005—Oriented
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/005—Oriented
    • B29K2995/0053—Oriented bi-axially

Definitions

  • This Mylar type D are a tensile strength of at least 1757.6 kg. per sq. cm. and has semi-rigidity; inertness; extremely long shelf life; contains no plasticizers; has-a very high melt temperature, and is resistant to most chemicals, acids, akalines, oils and other organics. It is relatively im- permable to moisture and oxygen and has >a heat conduction and is inert from fungus attacks. Has extremely high initial tear strength and has unique dielectric properties. Mylar is used to store valuable documents and collectors' items, film negatives and many other items affected by volatile plasticizers and additive compounds of the many other types of plastic films.
  • This invention may be summarized, at least in part, with reference to its objects. It is an object of this invention to provide, and it does provide, a bead welding of Mylar film which provides an extremely strong, flexible, clear, unwarping seal.
  • This method of welding is' ' provided by a hot ribbon and a cooling clamp. Heat from this ribbon is applied to the film for a determined period of time i l and temperature after which cooling is rapidly applied to the seal to bring the sealed film down to acceptable temp ⁇ erature levels.
  • the apparatus to be hereinafter more fully described utilizes heating to bead weld two or more sheets of plastic to each other.
  • the ribbon is spaced from the edges of the film and said edges are melted after being brought into position.
  • This apparatus includes means for clamping the films and with the congruent edge portions
  • OMPI extending an established distance from the clamp, a heated ribbon spaced an established distance from these edges causes said edges to be bead welded.
  • An eccentric apparatus when actuated moves the cold ribbon to and away from the clamped edges of the film providing locating means for the film edges prior to clamping.
  • two or more sheets of film are clamped together and held between spaced apart pairs of clamp jaws, then the edge of a heated ribbon is moved through the films to effect the severing, melting and bead welding of the film plies.
  • the heated ribbon- is used to cut and weld the thermoplastic strips or sheets. Distance, time and heat are critical to successful bead welding, particularly when and after Mylar D or other highly orientated materials are welded.
  • Continuous , welding is contemplated and is shown in three embodiments hereinafter more fully described.
  • bead welding of the film edges is made using a heated ribbon spaced from the edges of the travelling film strips.
  • the heated ribbon is used as a knife and two or more films are bead welded to ' orm a weld along and at the severed line.
  • a knife is first used to split the films and then a weld of these edges is made using a heated ribbon.
  • film sheets are severed by a heated ribbon while the strips are clamped.
  • the clamp jaws are then moved toward each other to form a bead weld of the two sheets of film at a given position.
  • FIG. 1 represents an isometric view, partly diagrammatic
  • FIG. 2 represents a side view, partly in section and diagrammatic and showing apparatus for gripping the film sheets in and by spring actuated arm means;
  • FIG. 3 represents the apparatus of FIG. 2 in a side, partly sectional view, and partly diagrammatic and with spring means for urging the heating ribbon into an estab- used position;
  • FIGS. 4 A and 4 B represent diagrammatic sectional side views of the bead melting of the edges of the film
  • FIG. 5 represents adiagrammatic side view of the apparatus for clamping, severing and bead welding of two or more plies of sheet material
  • FIGS. 6 A, 6 B, 6 C, 6 D, 6 E and 6 F represent pro ⁇ gressive steps of the bead welding performed by the appar ⁇ atus of FIG. 5, these several views diagrammatically show ⁇ ing step-by-step operation of said apparatus;
  • FIG. 7 represents a side view, partly fragmentary and diagrammatic, and showing continuous edge welding of two plies of film;
  • FIG. 8 represents a fragmentary sectional side view in an enlarged scale of the apparatus of FIG. 7, this view taken on the line 8 - 8 thereof and looking in the direct ⁇ ion of the arrows;
  • FIG. 9 represents a diagrammatic front view of apparatus and showing a heated ribbon member positioned in way of two plies of film and providing a cutting and weld- ing operation performed with the same heated ribbon;
  • FIG. 10 represents a side view of the apparatus of FIG. 9 . partly diagrammatic and fragmentary;
  • FIG. 11 represents a diagrammatic front view of an arrangement for advancing film strips to driving means and during the retention in and around a driving pulley the edges of the strips are bead welded;
  • FIG. 12 represents a fragmentary side view, partly
  • FIG. 11 is a diagrammatic representation of FIG. 11
  • FIGS. 13 A, 13 B, 13 C, 13 D, 13 E, and 13 F represen step-by-step bead welding similar to that of FIGS. 5 and 6 but with the heated ribbon adapted to make a bead seal of two films without separation, and
  • FIGS. 14 A, 14 B and 14 C represent step-by-step welding of arranged plies in a stacked insulated and clamp condition and diagrammatically showing edge welding of the plies as by heated air, flame or the like.
  • FIGS. 1 through 4-B Referring next to the drawings and the embodiment shown in the apparatus of FIGS. 1, 2 and 3, it is to be noted that the apparatus is of a length sufficient for bead welding two or more strips of sheets of material.
  • a base plate 20 carries two end plates 22 of which only the near member is seen in FIG. 1.
  • a protective guard 24 is indic ⁇ ated in phantom 'outline and is secured to the rear edge of the base 20.
  • Carried by these end plates is a rotatable shaft 26.
  • On this shaft is a plurality of like cams which are secured to the shaft by key means 29 and/or the like. This key means not only aligns the cams as to a flat portio 30 formed on each but also insures that the several cams are not displaced from their mounted condition on the shaft.
  • the shaft 26 has one end (near) that extends from the end plate 22 at a determined amount and as depicted there is mounted therein a lever handle 32 which is adapted to rotate the shaft a selected amount. This rotation is usually about a quarter turn and stops are provided to establish the limits of rotation.
  • Shown diagrammatically is a ribbon clamp assembly 36 which includes dovetail blocks 37 and 38.
  • a ribbon 40 that is selectively heated by the passing of electrical current therethrough is carried by a clamp assembly generally identified as 36 at each end of the apparatus. Only the near end clamp assembly 36 is shown in this FIG. 1. This near end clamp assembly spring tensions the ribbon to- maintain it taut as its length increases during heating.
  • the clamp assembly 36 is provided with a slide guide 42 that has an open forked end 43 engaged by a through rod 44.
  • a U-shaped electrical insulator 46 of sheet material is dis ⁇ posed between block 37 and guide 42. Also seen in a cool ⁇ ing tube of conduit 48 which is carried in support block 50.
  • pivot supports 5 which are mounted in threaded holes and extend upwardly from tapped holes formed in support bar 52.
  • Nuts 55 are each mounted on the threaded shank of a socket headed cap screw 56. Tb-e screws are rotated so as to be moved up and down and are locked in position by the nut 55 ' - This adjustment is made so as to bring the movable clamp bar means in the desired arrangemen .
  • the underside of screw 56 is made with a circular groove which is sized to receive and retain a roll pin 57.
  • This roll pin is carried in a transverse hole formed in an L-shaped support member 58.
  • An elongated aperture 6 ⁇ is formed in this L-shaped support member 58 and in this elongated aperture the shank of said screw is carried.
  • the forward end of this L-shaped support is pro ⁇ vided with a pair of through holes (not shown) and in these holes is positioned a pair of cap screws 62 and 63 as seen in FIG. 1 which enter threaded holes and secure a clamp bar portion 64.
  • This clamp bar portion is normal to the L-shaped support 58 and is urged with and by said L-shaped support into a clamping condition against a fixed support plate 66 as seen in FIGS. 2 and 3 « It is to be noted in FIG. 2 that this L-shaped support 58 is actuated toward a clamping position by a spring plunger 68 and compression spring 70. A sliding bar or strip 72 is moved into and out of compressing condition so as to load or unload spring 70 when the bar 64 is moved to bring the L-shaped support and the spring-bias into a gripping con ⁇ dition.
  • shaft 26 has a pluralit of recesses and mounted in each is a ball 74 which is adapted to and does engage the L-shaped support 58 at its midlength and lifts said L-shaped support 58 and clamp bar portion 64 from gripping condition.
  • the lift force applied by the ball 74 is provided by the rotation of shaft 26 when the lever handle is manipulated.
  • about ninety degrees counterclockwise from the balls 74 are pins 7 which also engage the mid ⁇ length of the L-shaped support when the shaft is further rotated counterclockwise. This additional lift causes the clamp bar portions 64 to be lifted for adjustment or other operations.
  • the cooling tube or conduit 48 as seen in FIGS. 1,2 and 3 is carried by and in block 50 and provides means for cooling this bar after heat has been applied to the ribbon or strip 40.
  • FIG. 3 there is depicted the apparatus for making the eccentric movement.
  • the cams 28 have flat por ⁇ tions 30 and as the handle ⁇ ⁇ 2 and shaft 26 are rotated these circular cams are rotated so that the circular por- tion engages and pushes leftwardly an angle shaped shoe member 78.
  • This member is adjustably positioned by means of a cap screw 79 and nut 80.
  • a slot 81 is provided in member 78 for movement to the desired adjusting position.
  • FIG. 2 shows a block which is secured to the base 20 and provides a rearward stop limit to the angle-shaped shoe member 78. Also to be noted is a groove 88 forme in the top surface of the channel member 82 to provide a guideway for the angle- shaped shoe 78. This is particularly noted in FIG. 3 - As seen in FIG.
  • the ribbon 40 is a small distance from the face of channel-shaped member 82 and this ribbon is urged forwardly to provide a locating stop for the film stop for the film edges prior to welding as shown in FIG. 4 A.
  • the clamp 64 then engages the films, after which the member 82 is retracted to the position of FIG. 3.
  • Film plies 90 and 91 are then heated and melted at their edges that extend rightwardly from the clamp 64 by heat radiated from ribbon 40, shown in FIG. 4 B.
  • the electrical current is then stopped and cooling air from a source not shown is directed at the melted end of the film plies.
  • the clamp 64 is lifted by rotating the arm 32 and the now welded film plies 90 and 91 are removed from the apparatus.
  • the arm rotation returns the,member 82 to the position in FIG.
  • Length of material extending toward heat source from clamp members 64 and 66 (FIG. 4A) ; spacing between ribbon and protruding material prior to heating the ribbon (FIG. 3) ; intensity and time of heating, and rate of cooling.
  • the cooling provided by air directed at the weld and the water cpoling, if used, establishes the period of time needed to cool the weld before unclamping and removal from the apparatus.
  • FIG. 1 is fragmentary and does not show the other end of the apparatus which may or may not have a handle 32.
  • the clamping of the ribbon is by similar components but made as mirror images.
  • the length of the apparatus is made to suit the width of film plies and the extent of clamp movement is a matter of selection as is the number of eccentrics.
  • the shaft 26 may be supported intermediate its ends by a support not shown. Bearings and stops are merely design selection.
  • FIGS. 5 and 6 A through F The welding of very hard to join materials such as Mylar and spun bonded thermoplastics may include the join ⁇ ing of .two or more plies intermediate their edges or ends.
  • Two fixed jaw members 110 and 112 support two or more sheets or plies of materials. As shown in FIG.
  • plies 114 and 115 are secured in place by movable jaw members 116 and 117 which are adapted to be moved downwardly to a clamped con ⁇ dition as seen in the second step of FIG. 6 B. While re- tained in the desired clamped condition a heated strip or ribbon 118 is moved downwardly to and through the clamped plies 114 and 115 as seen in FIG. 6 C.
  • the means for sup ⁇ porting and moving this heated ribbon 118 is depicted as a cylinder 120 which carries a ⁇ * stretcher member 122 having its ends provided with biased outwardly support means 124 and 125.
  • Insulating means or blocks 127 and 128 are pro ⁇ vided so that an electrical current is not carried from the ribbon 118 to the actuating apparatus usually of metal.
  • the upper and movable jaw members 116 and 117 are carried by end members 130 and 131 which may be guided in their reciprocable movement by a base member 132.
  • a member 136 follows 122 downward until its movement is stopped by engagement of clamps 116 and 117 with clamps 110 and 112.
  • the piston is carried by a support I38.
  • Members I36 and 122 are cycled up and down in response to the de ⁇ sired time operation.
  • FIG. 6 D the film plies 114 and 115 are shown as being severed by a heated ribbon 118.
  • This heated ribbon melts both plies and produces a bead weld.
  • the plies re ⁇ mained clamped while the bead melt is cooled.
  • the heated ribbon 118 is again moved upwardly as seen in FIG. 6 E.
  • the jaw members 116 and 117 are again moved upwardly as in FIG. 6 F and the plies 114 and 115, now welded and severed, have a bead weld to join the plies at the severed position.
  • the thickness of the film plies and the composition of the material of the plastic film are critical to the desired welding of the plies together.
  • the temperature in the . heated ribbon 118 and speed of movement of said ribbon is established in view of the thickness and com ⁇ position of plies of material.
  • the spacing of the jaw members from the heated ribbon is contemplated to be about 1.588 mm with the weld or bead formed by surface tension toward the clamp jaws as indicated in FIGS. 6 E and 6 F.
  • FIGS. 7 and 8 apparatus for continuous edge welding of strips of thermoplastic materials.
  • a base plate 150 carries the several components of this apparatus, and is a rather diagrammatic showing of the preferred arrangement and function of said apparatus.
  • Film sheets 152 and 153 are brought between and moved for- wardly by upper and lower belts 155 and 156. As shown, these belts are endless and are carried and advanced by grooved pulleys 158, 159, l6 ⁇ and 161.
  • the two right pulleys are designated as? 158 and 159 and the pulleys to the left as viewed in FIG. 7 are designated as 160 and 161.
  • the left pulleys are carried by a header member 163 and said member pivotally carries arms I65 and 166 and the rotatable pulleys l6 ⁇ and 161.
  • An adjusting screw 168 is carried in a threaded nut or member I69 in header member 163. Rotation of the screw 168 moves the pulleys l6 ⁇ and 161 to the right or left to loosen or tighten the belts 155 and 156.
  • the belts 155 and 156 are matched in their speed by a gear arrangement associated with pulleys 158 and 159• These gears have a like pitch and number of teeth.
  • Driving means (not shown) cause the gears and their associated pulleys to drive the endless belts in synchronism.
  • Upper and lower blocks 182 and 183 are carried on angle supports 185 and 186. Each block has a water cooled passageway with the upper passage- way identified as 188 and the lower as 189. Carried by blocks 182 and 183 are guide members or strips 191 and 192 each adjustably secured by .cap screws-194. Member 191 is spring biased toward member 192 (by means not shown) 5 to clamp the material between the belts, A heated ribbon
  • -> or strip 196 is shown in FIG. 8 and melts the protruding edges of the material strips or sheets 152 and 153• Since the spacing of the material edges relative to the heat source and clamping means is critical, cutting means (not 10 shown) are provided between the endless belts and the material to be trimmed. Trim support rollers 197 and 198 carry the trim through the cutting station while the material to be welded is carried by the belts.. Air cool ⁇ ing may be directed at the weld when the material emerges 15 to region 199 of the belts path. Cooling clamp rollers may also be used on the soft weld in region 199, additionally re-orientating the weld- material. With some materials the cutting step may be eliminated by lifting one end of the ribbon so its bottom edge is slightly above, the plane of 20. the advancing material where it first meets the ribbon.
  • FIGS. 9 and 10 are fragmentary ' and diagrammatic and show that in addition " to the apparatus for welding as . ' in- FIGS. 7 and 8 the plies of film may be continuously " " welded 25 intermediate their sides or edges.
  • upper rollers 200 and 201 carried and rotated by shaft 202.
  • Lower rollers 204 and 205 are carried on shaft 206. These rollers are intended to advance gripped film plies 208 and 209. In the space between upper rollers 200 and 201 and a like 30 space between lower rollers 204 and 205 is carried a. heated ribbon 210.
  • FIGS. 11 and 12 ' FIGS. 11 and 12 are fragmentary and diagrammatic. Depicted is an endless belt 216 -as carried on pulleys or rollers 218, 219, 200 and 221. A large roller 223 forms a U-path and is rotated to advance the film strips 225 and 226. A heater unit 228 is mounted adjacent the roller 223. The heated portion 230 of the mount is depicted along the circular path of the film strips 225 and 226 around the roller 223. The roller 223 is cooled to insure that the film strips do- not adhere to it or to the belt 216. If required, the heated portion of unit 228 may not extend for the full one hundred-eighty degrees of material travel about the roller and .the remaining clamped region of film travel may have the weld cooled by directed air flow.
  • FIGS. 11 and 12 has a knife 231 to split the inward moving film strips instead of the heated ribbon of-FIG. 9 « This knife assures congruent material edges and does not require heat to sever the materials.
  • FIGS. 12 A through 13 F The step-by-step showing of FIGS. 13 A through 13 F anticipates the use of apparatus very similar to that shown and described with respect to FIGS. 5 and 6 A through 6 F.
  • the apparatus of FIG. 5 is employed to effect, a welding of two plies at an intermediate position.
  • This concept anticipates that the melt weld will establish a seal or joining of the two plies at an inter- mediate position.
  • lower jaws 310 and 312 support ' two or more plies of plastic film which, as shown in FIG. 13 A, are identified as 314 and 315.
  • Upper jaw members 316 and 317 are adapted to be moved downwardly to a clamped condition as seen in FIG. 13 B which shows the second of the progressive steps.
  • These clamped plies are now melted by a heated ribbon 318 which is ' moved downwardly to and sufficiently through the plies to .sever and melt as shown in FIG. 1 C,
  • FIG. 13 E the jaw members 310 and 312 are moved towards each other after the ribbon 318 has been lifted upwardly.
  • the upper jaw members 316 and 317 are moved to- ward each other to ' produce a common bead 319•
  • the jaws 310, 312, 316 and 31 are moved to the condition and position of FIG. 13 A and as seen in FIG. 13 F the now joined film plies as an assembly are removed from the apparatus.
  • cooled members 320 and 321, shown in FIG. 13 D may be introduced to clamp and flatten the soft weld.
  • the thickness and composition of the films are critical to the satisfactory welding or joining plies 314 and 135- As above noted, the temperature of the heated ribbon 318 and time of said ribbon between the welds establishes the bead welding procedure. The spacing between the clamps and the ribbon is also critical.
  • the weld of the plies of film may be cooled by means other than clamps and/or chilled fluid. For example, in FIG. 13 E an air conduit 322 is shown and provides a blast of air to the melted films. Air nozzle means may be used in any and all of the embodiments and the disposition and number of blast controls is provided in accordance with the apparatus to be used.
  • FIGS. 14 A, 14 B and 14 C Referring next and finally to the step-by-step appar ⁇ atus and operation as diagrammatically depicted in the FIGS. 14, A, B and C, it is to be noted that in addition to using heat from an electrical resistance heating element, preheated gasses such as air, or hot gaseous combustion products, may be employed to effect a weld in accordance with this disclosure.
  • FIG. 14 A shows stacked pairs of materials 401 to be protruding simultaneously from multiple clamp members 400. When hot gasses are directed against the protruding congruent edges of the materials, the Y form into welds as shown in FIG. 14 B. Rapid cooling is _--_-—_— *
  • FIG. 14 C shows the clamped assembly of FIGS. 14 A and 14 B with the protruding material edges depending vertically over a heated platen 402. Forming a weld in this position allows gravity to substantially improve its symmetry and other properties.
  • thermoplastic felted materials can be quilted by clamping them between a pierced insulating member and a conductive member.
  • a high voltage discharge is dir ⁇ ected through the holes in the insulation member fusing the felt fibers together according to the hole pattern.
  • Interior shaped welds including round holes, may be provided interiorly of the perimeters of stacked plies of material by suitably shaping the clamping means and pro ⁇ viding heat in accordance with the methods of this dis ⁇ closure.
  • Control heating is especially important when welding Mylar since it decomposes if heated much above its welding temperature. Since gas bubbles may form in the weld, some heat must be maintained long enough for the bubbles to re- absorb after which the weld must be quickly cooled to avoid recrystallization and brittleness. The methods herein- before disclosed successfully address these problems.
  • the several embodiments above described contemplate welding two or more plies of thermoplastic film together. These depicted apparati contemplate that the very difficult to weld films will be successfully welded by localized melting of the plastic film. Whether two or more plies are joined at the ends, edges or intermediate thereof, the heated ribbon is brought to a temperature much greater than -the melting temperature of the plastic. This achieves a very fast melting of the plastic.
  • the clamping means provides a cooling means to prevent any of the films held in the gripping means from changing their characteristics. Assuming Mylar D (TM DuPont) is to be welded, the melting temperature is 815 Centigrade.
  • the ribbon is heated from 1,112 to 4,532 Centigrade.
  • the time of exposure is a very critical factor and the spacing from the ribbon to the edge of the plies, depending on their nature, when the ribbon is heated is about 0.79 mm.
  • the spacing between the clamps and the edges of the plies to be heated is from 1.448 to 1.702 mm as applied to Mylar D.
  • Production processes have indicated that 1.59 mm, with an extreme tolerance of plus or minus 0.397 ⁇ im, establishes the limits of parameters of satisfactory bead welding of the edge.
  • the edges of the clamp members as shown are sharp so that the cooling effect of the clamp members is not dissipated.
  • the plies of film may be brought to a cooled ribbon and then clamped. After clamp ⁇ ing, the ribbon is moved away from the film edges and the ribbon heated for a determined short interval of time.. The weld is cooled by the clamp means and directed air flow and the welded portion released after which the process is re- peated.
  • the heated ribbon causes the advancing plies to melt at this severed portion.
  • the belt arrangement may have a heated ribbon or member made as a curved element and the remainer of the curved element adjacent the endless belt may be provided for cooling. Removal of the trim from the knife cut is effected by means not shown.
  • roller 223 in FIG. 11 and other rollers may be chilled to provide localized cooling to the melted film portions and the chilled rolls, in their selection, size and temperature, are a matter of selection directed toward the requirement of the apparatus and plies.
  • the several embodiments show the joining or securing of two or more plies of materials by melting the materials at very local areas while gripping these same plies by clamp or belt means to hold together and cool the adjacent ply area and prevent melting of the plastic except in the protruding area.
  • the protruding amount of the plies of film is usually from 1.448 to 1.702 mm.
  • the total 1 thickness of plies is usually 0.025 mm- or greater.
  • the cost of Mylar D and like plastic is usually high, so the thickness of the film is kept to a minimum.
  • Terms such as “left”, “right”, “up”, “down”, “bottom”, “top”, “front”, “back”, “in”, “out”, and the like are applicable to the embodiments shown and described in con ⁇ junction with the drawings. These terms are merely for the purposes of desc iption and do not necessarily apply to the position in which the welding apparatus for joining plies of film may be constructed or used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Fluid Mechanics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Un dispositif de soudage utilise un ruban conducteur (40) qui est chauffé en dessus de la température de fusion de couches de matériaux plastiques laminaires (90, 91) maintenues et serrées par des mâchoires de serrage (64, 66). Ces mâchoires (64, 66) sont plus froides que la température de fusion des couches (90, 91) qui sont serrées par les mâchoires (64, 66) de manière à souder localement les couches (90, 91) en fondant leurs bords proéminants à une température prédéterminée et pendant un laps de temps prédéterminé au moyen de l'énergie électrique traversant le ruban (40). Lorsque le soudage est complet et après son refroidissement les mâchoires (64, 66) sont écartées pour libérer les couches soudées (90, 91). Les bords des mâchoires (64, 66) opposés au ruban chauffé (40) forment entre eux un angle sensiblement droit et sont écartés de 1,2 à 1,98 mm.
EP83900248A 1981-12-03 1982-12-01 Soudage thermique de materiaux thermoplastiques Withdrawn EP0095498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32712781A 1981-12-03 1981-12-03
US327127 1981-12-03

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EP (1) EP0095498A1 (fr)
DE (1) DE3249235T1 (fr)
GB (1) GB2110594A (fr)
SE (1) SE8304252D0 (fr)
WO (1) WO1983001926A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502906A (en) * 1981-12-03 1985-03-05 William E. Young Heat welding of thermoplastics
US5209800A (en) * 1990-08-20 1993-05-11 Denco, Inc. Total containment welding of plastic tubes
US5358785A (en) * 1991-05-28 1994-10-25 Fuji Photo Film Co., Ltd. Laminated film and process for producing the same
WO2012055414A1 (fr) * 2010-10-27 2012-05-03 Roll-O-Matic A/S Procédé et appareil de soudage mutuel de deux feuilles de matériaux thermosoudables
EP2514583B1 (fr) * 2011-04-18 2014-07-09 Heinrich Kuper GmbH & Co. KG Dispositif de soudage et de découpe de feuilles et analogues

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Publication number Priority date Publication date Assignee Title
CA788969A (en) * 1968-07-02 Zelnick Seymour Apparatus and method for sealing and/or heat-cutting thermoplastic films
US2606850A (en) * 1949-12-03 1952-08-12 Shellmar Products Corp Sealing machine and method
DE1213598B (de) * 1962-04-12 1966-03-31 Windmoeller & Hoelscher Verfahren und Vorrichtung zum Verschweissen der Stirnkanten aufeinanderliegender Lagen aus thermoplastischem Material
DE1242353B (de) * 1962-12-05 1967-06-15 Basf Ag Verfahren und Vorrichtung zum Herstellen von geschweissten Saecken aus einem Folienschlauch mit Seitenfalten aus thermoplastischem Kunststoff
GB1398248A (en) * 1973-05-11 1975-06-18 Reed International Ltd Cutting and welding devices for plastics sheet material
US4259134A (en) * 1979-04-12 1981-03-31 Joice Richard L Polymer film slitter-sealer apparatus and method
US4319952A (en) * 1980-12-29 1982-03-16 Schjeldahl Gilmore T Reciprocally moving hot-wire for bag making machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8301926A1 *

Also Published As

Publication number Publication date
SE8304252L (sv) 1983-08-03
SE8304252D0 (sv) 1983-08-03
WO1983001926A1 (fr) 1983-06-09
GB2110594A (en) 1983-06-22
DE3249235T1 (de) 1984-04-05

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