JP2010110985A - Method for welding resin, and tank manufacturing method using the method - Google Patents

Method for welding resin, and tank manufacturing method using the method Download PDF

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Publication number
JP2010110985A
JP2010110985A JP2008285157A JP2008285157A JP2010110985A JP 2010110985 A JP2010110985 A JP 2010110985A JP 2008285157 A JP2008285157 A JP 2008285157A JP 2008285157 A JP2008285157 A JP 2008285157A JP 2010110985 A JP2010110985 A JP 2010110985A
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Japan
Prior art keywords
resin
laser beam
laser light
irradiated
wavelength
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Application number
JP2008285157A
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Japanese (ja)
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JP5201533B2 (en
Inventor
Takeshi Hatta
健 八田
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Toyota Motor Corp
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Toyota Motor Corp
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Priority to JP2008285157A priority Critical patent/JP5201533B2/en
Publication of JP2010110985A publication Critical patent/JP2010110985A/en
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Publication of JP5201533B2 publication Critical patent/JP5201533B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • 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
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission 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
    • B29C65/14—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
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1645—Laser beams characterised by the way of heating the interface heating both sides of the joint, e.g. by using two lasers or a split beam
    • 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
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning 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
    • 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
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • 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
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • B29C65/1667—Laser beams characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
    • 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
    • B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding 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
    • B29C66/70—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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • 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
    • B29C66/91216—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 enabling contactless temperature measurements, e.g. using a pyrometer
    • 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
    • B29C66/91221—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 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
    • B29C66/914—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
    • 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
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—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
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    • 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
    • B29C66/7375—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 uncured, partially cured or fully cured
    • B29C66/73751—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 uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized
    • B29C66/73752—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 uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized the to-be-joined areas of both parts to be joined being uncured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
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    • 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
    • B29C66/7394—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 thermoset
    • B29C66/73941—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 thermoset characterised by the materials of both parts being thermosets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7154—Barrels, drums, tuns, vats
    • B29L2031/7156—Pressure vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7172—Fuel tanks, jerry cans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/747—Lightning equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/749—Motors
    • B29L2031/7492—Intake manifold

Landscapes

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

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a welding time and to further stabilize welding quality. <P>SOLUTION: The part 22 to be welded of the resin is irradiated with laser beams L2 having a wavelength longer than a predetermined value and laser beams L1 having the wavelength shorter than the predetermined value. For example, semiconductor laser beams can be used as laser beams L1 having the shorter wavelength and YAG laser beams or CO<SB>2</SB>laser beams can be used as the laser beams L2 having the longer wavelength. When a resin liner 20 is targeted, preferably it is irradiated with the laser beams L2 having the longer wavelength from the outside of the resin liner 20 and is irradiated with the laser beams L1 having the shorter wavelength from the inside of the resin liner 20. Furthermore, temperature or laser beam irradiation amount of part irradiated with the laser beams is measured by a measuring device 50 and irradiation amount of the laser beams is adjusted based on measuring result. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、樹脂の溶着方法およびこれを使用したタンク製造方法に関する。さらに詳述すると、本発明は、レーザ光を用いた樹脂の溶着方法の改良に関する。   The present invention relates to a resin welding method and a tank manufacturing method using the same. More specifically, the present invention relates to an improvement in a resin welding method using laser light.

従来、軽量化等の観点から、配管などを構成するパイプ形状品や、ガス容器の内殻（ライナ）を樹脂化して樹脂成形品にすることが行われる。この種の樹脂成形品は、予め分割して成形された分割成形品を互いに接合することで構成されることが多く、その場合の接合方法としてレーザ溶着方法が利用されている。   Conventionally, from the viewpoint of weight reduction or the like, a pipe-shaped product constituting a pipe or the like, and an inner shell (liner) of a gas container are made into a resin molded product. This type of resin molded product is often configured by joining divided molded products that have been divided and molded in advance, and a laser welding method is used as a joining method in that case.

このような樹脂成形品のレーザ溶着方法としては、レーザ溶着中の接合部分に不活性ガスを吹き付けるものが知られている。また、分割樹脂ライナどうしをレーザ溶着する際、接合部分の近傍において不活性ガスの温度調整がなされる場合もある（例えば、特許文献１参照）。
特開２００７−２２３０８７号公報 As a method for laser welding such a resin molded product, a method in which an inert gas is blown onto a joint portion during laser welding is known. In addition, when laser welding the divided resin liners, the temperature of the inert gas may be adjusted in the vicinity of the joining portion (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2007-223087

しかしながら、不活性ガスでは接合部分近傍の空気を加熱するだけであり、分割樹脂ライナの接合部分を直接加熱しているわけではないことから、溶着に時間を要する場合がある。また、直接加熱できない場合には、溶着品質が安定しない場合もある。   However, since the inert gas only heats the air in the vicinity of the joining portion and does not directly heat the joining portion of the divided resin liner, it may take time for welding. In addition, when direct heating is not possible, the welding quality may not be stable.

そこで、本発明は、溶着時間を短縮させ、尚かつ溶着品質をより安定化させることを可能とした樹脂の溶着方法およびこれを使用したタンク製造方法を提供することを目的とする。   Therefore, an object of the present invention is to provide a resin welding method and a tank manufacturing method using the same, which can shorten the welding time and further stabilize the welding quality.

かかる課題を解決するべく本発明者は種々の検討を行った。実際のレーザ溶着の場面を鑑みると、レーザ溶着する樹脂材の一方をレーザ光透過材、他方をレーザ光吸収材（レーザ光不透過材）で形成し、両者を突き合わせた状態としてレーザ光不透過材側からレーザ光を照射し、吸収材側にて発熱させることによって溶着が行われている（図４参照）。しかし、（１）透過材側から半導体レーザが照射され、（２）レーザ光透過材を透過したレーザ光がレーザ光吸収材に届き、レーザ光吸収材が発熱し、（３）レーザ光吸収材の熱がレーザ光透過材にも伝わり、（４）これによって両材料が溶融して混ざり合い接合する、という過程を経ることから、レーザ光吸収材を直接加熱することはできずその分だけ溶着に時間を要している。また、従来のレーザ溶着によると、レーザ溶着したい局所以外の部位にも熱が広がることからバリや焦げなどが発生する原因にもなっており、加熱温度の管理が難しく、溶着品質が安定しない場合がある。さらに、溶着サイクルを短くするべくレーザ照射量を増やそうとしても、透過材側のレーザ光透過率には限界があるとともに、樹脂劣化の懸念もあり、現状、レーザ照射量を大きく上げることは効果的ではない。このような状況下、樹脂溶着の高速化と品質向上について検討を重ねた本発明者は、課題の解決に結び付く新たな知見を得るに至った。   In order to solve this problem, the present inventor has made various studies. Considering the actual laser welding situation, one of the resin materials to be laser-welded is formed with a laser light transmitting material and the other is formed with a laser light absorbing material (laser light non-transmitting material). Welding is performed by irradiating a laser beam from the material side and generating heat on the absorber side (see FIG. 4). However, (1) the semiconductor laser is irradiated from the transmitting material side, (2) the laser light transmitted through the laser light transmitting material reaches the laser light absorbing material, the laser light absorbing material generates heat, and (3) the laser light absorbing material. (4) As a result, both materials are melted, mixed, and joined together. Therefore, the laser light absorbing material cannot be directly heated and is welded accordingly. It takes time to. In addition, conventional laser welding also causes burrs and scorching because heat spreads to parts other than the local area where laser welding is desired, and it is difficult to control the heating temperature and the welding quality is not stable. There is. Furthermore, even if it is attempted to increase the laser irradiation amount in order to shorten the welding cycle, there is a limit to the laser light transmittance on the transmission material side, and there is also a concern about resin deterioration. It is currently effective to increase the laser irradiation amount greatly. Not right. Under such circumstances, the present inventor, who has repeatedly studied speeding up and improving the quality of resin welding, has come to obtain new knowledge that leads to the solution of the problem.

本発明はかかる知見に基づくものであり、樹脂の溶着方法であって、所定値よりも波長の長いレーザ光と、所定値よりも波長の短いレーザ光とを当該樹脂の溶着対象部分に照射する、というものである。   The present invention is based on such knowledge, and is a resin welding method in which a laser beam having a wavelength longer than a predetermined value and a laser beam having a wavelength shorter than a predetermined value are irradiated to a portion to be welded of the resin. That's it.

波長の長いレーザ光は、波長の短いレーザ光に比べて透過性に劣るため吸収されやすい。そこで本発明においては、所定値よりも波長の短いレーザ光（例えば従来の半導体レーザ光）に加え、所定値よりも波長の長いレーザ光も溶着対象部分に照射し、レーザ波長の違いを利用して樹脂を局所的かつ効果的に加熱することを可能としている。すなわち、波長の短いレーザ光であれば透過してしまうレーザ光透過材に対し、所定値よりも波長が長いレーザ光を照射することにより、レーザ光透過材においても発熱させることを可能としている。   A laser beam having a long wavelength is easily absorbed because it is less transmissive than a laser beam having a short wavelength. Therefore, in the present invention, in addition to laser light having a wavelength shorter than a predetermined value (for example, conventional semiconductor laser light), laser light having a wavelength longer than the predetermined value is irradiated to the welding target portion, and the difference in laser wavelength is utilized. This makes it possible to heat the resin locally and effectively. That is, by irradiating a laser beam having a wavelength longer than a predetermined value to a laser beam transmitting material that transmits if the laser beam has a short wavelength, the laser beam transmitting material can also generate heat.

この溶着方法においては、例えば波長の短いレーザ光として半導体レーザ光を用い、波長の長いレーザ光としてＹＡＧレーザ光またはＣＯ2レーザ光を用いることができる。ＹＡＧレーザ光およびＣＯ2レーザ光は半導体レーザ光よりも波長が長いことから、半導体レーザ光であれば透過していたレーザ光透過材にて吸収され、当該レーザ光透過材自体を発熱させることが可能である。 In this welding method, for example, semiconductor laser light can be used as laser light having a short wavelength, and YAG laser light or CO 2 laser light can be used as laser light having a long wavelength. Since the YAG laser light and the CO 2 laser light have longer wavelengths than the semiconductor laser light, the semiconductor laser light is absorbed by the transmitted laser light transmitting material, and the laser light transmitting material itself can generate heat. Is possible.

本発明の溶着対象たる樹脂は、例えば少なくとも２つの樹脂ライナである。また、この場合には、波長の長いレーザ光を樹脂ライナの外側から、波長の短いレーザ光を樹脂ライナの内側からそれぞれ照射することが好ましい。本発明にかかる溶着方法の場合、波長の長いレーザ光を照射した部位の方が、波長の短いレーザ光を照射した部位よりも温度が上昇しやすい。この点、湾曲した樹脂ライナの外側に波長の短いレーザ光を照射する本発明においては、より高温となりやすい樹脂ライナの外側の温度計測等を行いやすい。さらに、この場合においては、レーザ光を反射鏡にて反射させて樹脂ライナに照射することにより、当該レーザ光を樹脂ライナ内側の所望位置に所望角度で照射しやすくなる。   The resin to be welded in the present invention is, for example, at least two resin liners. In this case, it is preferable to irradiate laser light having a long wavelength from the outside of the resin liner and laser light having a short wavelength from the inside of the resin liner. In the case of the welding method according to the present invention, the temperature of the portion irradiated with the laser beam having a long wavelength is likely to rise more than the portion irradiated with the laser beam having a short wavelength. In this regard, in the present invention in which laser light having a short wavelength is irradiated to the outside of the curved resin liner, it is easy to perform temperature measurement or the like on the outside of the resin liner that tends to be higher in temperature. Furthermore, in this case, the laser beam is reflected by the reflecting mirror and applied to the resin liner, so that the laser beam can be easily applied to a desired position inside the resin liner at a desired angle.

また、レーザ光が照射される部分の温度ないしはレーザ光照射量を測定装置により測定し、測定結果に基づいて当該レーザ光の照射量を調整することが好ましい。これによれば加熱温度を制御して溶着状態をより精度よく管理することができる。   Further, it is preferable to measure the temperature of the portion irradiated with the laser beam or the laser beam irradiation amount with a measuring device and adjust the irradiation amount of the laser beam based on the measurement result. According to this, the welding temperature can be controlled with higher accuracy by controlling the heating temperature.

さらに、樹脂どうしを密着させるための外力を作用させながらレーザ光を照射することも好ましい。   Furthermore, it is also preferable to irradiate the laser beam while applying an external force for bringing the resins into close contact with each other.

また、本発明にかかるタンク製造方法は、上述した溶着方法を使用して分割樹脂ライナを溶着するというものである。   Moreover, the tank manufacturing method according to the present invention is to weld the divided resin liner using the above-described welding method.

本発明によれば、溶着時間を短縮させ、尚かつ溶着品質をより安定化させることが可能となる。   According to the present invention, it is possible to shorten the welding time and further stabilize the welding quality.

以下、本発明の構成を図面に示す実施の形態の一例に基づいて詳細に説明する。   Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

図１〜図３に本発明にかかる樹脂の溶着方法の一実施形態を示す。以下では、本発明にかかる溶着方法を、燃料電池システムの水素タンクを構成する樹脂ライナの成形に適用した場合について説明する。   1 to 3 show an embodiment of a resin welding method according to the present invention. Below, the case where the welding method concerning this invention is applied to shaping | molding of the resin liner which comprises the hydrogen tank of a fuel cell system is demonstrated.

水素タンク（以下、高圧タンクともいう）１は、例えば燃料電池車の燃料ガス供給用タンクとして好適なものであり、特に図示はしないが例えば３つの高圧タンク１が車体のリア部に搭載される等して用いられる。高圧タンク１は、燃料電池システムの一部を構成し、燃料ガス配管系を通じて燃料電池に燃料ガスを供給する。高圧タンク１に貯留される燃料ガスは、例えば水素ガス、圧縮天然ガスといった可燃性の高圧ガスである。   A hydrogen tank (hereinafter also referred to as a high-pressure tank) 1 is suitable, for example, as a fuel gas supply tank for a fuel cell vehicle. Although not particularly illustrated, for example, three high-pressure tanks 1 are mounted on the rear portion of the vehicle body. Used as equal. The high-pressure tank 1 constitutes a part of the fuel cell system and supplies fuel gas to the fuel cell through the fuel gas piping system. The fuel gas stored in the high-pressure tank 1 is a combustible high-pressure gas such as hydrogen gas or compressed natural gas.

図１は、高圧タンク１の概略構成を示す断面図である。高圧タンク１は、例えば両端が略半球状である円筒形状のタンク本体１０と、当該タンク本体１０の長手方向の一端部に取り付けられた口金部１１，１８を有する。タンク本体１０は例えば二層構造の壁層を有し、内壁層である樹脂ライナ２０とその外側の外壁層である樹脂繊維層（補強層）としての例えばＣＦＲＰ層２１を有している。   FIG. 1 is a cross-sectional view showing a schematic configuration of the high-pressure tank 1. The high-pressure tank 1 includes, for example, a cylindrical tank body 10 having both ends substantially hemispherical, and a cap part 11, 18 attached to one end part in the longitudinal direction of the tank body 10. The tank body 10 has, for example, a two-layer wall layer, and has a resin liner 20 that is an inner wall layer and a CFRP layer 21 that is a resin fiber layer (reinforcing layer) that is an outer wall layer on the outer side.

樹脂ライナ２０は、タンク本体１０とほぼ同じ形状に形成される。樹脂ライナ２０は、例えばポリエチレン樹脂、ポリプロピレン樹脂、またはその他の硬質樹脂などにより形成されている。   The resin liner 20 is formed in substantially the same shape as the tank body 10. The resin liner 20 is made of, for example, polyethylene resin, polypropylene resin, or other hard resin.

本実施形態では、タンク軸方向の略中心で分割されたのと同じ形状の２種類の分割樹脂ライナをあらかじめ成形し、これらを溶着することによって両端が略半球状である円筒形状の樹脂ライナ２０を得ることとしている。これら分割樹脂ライナのうち、一方は透過性樹脂ライナ２０ａであり、他方は吸収性樹脂ライナ２０ｂである（図２参照）。   In the present embodiment, two types of divided resin liners having the same shape as that divided at substantially the center in the tank axial direction are formed in advance and welded to form a cylindrical resin liner 20 having both ends substantially hemispherical. Trying to get. Of these divided resin liners, one is a permeable resin liner 20a and the other is an absorbent resin liner 20b (see FIG. 2).

本実施形態の透過性樹脂ライナ２０ａは、半導体レーザ光Ｌ１を透過させるがＹＡＧレーザ光Ｌ２を吸収する（透過させない）ように成形された分割樹脂ライナであり、吸収性樹脂ライナ２０ｂは、半導体レーザ光Ｌ１をも透過させずに吸収するように成形された分割樹脂ライナである。透過性樹脂ライナ２０ａが例えばナイロン（登録商標）製である場合、吸収性樹脂ライナ２０ｂを例えばカーボン材を含むナイロン（登録商標）製とすることで、両分割樹脂ライナ２０ａ，２０ｂの物性を合わせつつレーザ光の透過性を異ならせることができる。なお、本明細書では「透過」、「吸収」といった表現を用いて本発明を説明しているが、これらはレーザ光のすべてが透過しあるいは吸収されることだけを意味するものではなく、レーザ光の一部が透過しあるいは吸収されることをも当然に含む。   The transparent resin liner 20a of the present embodiment is a divided resin liner that is shaped to transmit the semiconductor laser light L1 but absorb (not transmit) the YAG laser light L2, and the absorbent resin liner 20b is a semiconductor laser beam. This is a divided resin liner molded so as to absorb light L1 without transmitting it. When the permeable resin liner 20a is made of nylon (registered trademark), for example, the absorbent resin liner 20b is made of nylon (registered trademark) containing, for example, a carbon material, so that the physical properties of both the divided resin liners 20a and 20b are matched. However, it is possible to make the laser beam transmissivity different. In the present specification, the present invention is described using expressions such as “transmission” and “absorption”, but these do not mean that all of the laser light is transmitted or absorbed. Naturally, part of the light is transmitted or absorbed.

ＣＦＲＰ層２１は、例えばＦＷ成形（フィラメントワインディング成形）により、樹脂ライナ２０の外周面と口金部１１の凹み部１１ｂに、樹脂の含浸した補強繊維を巻き付け、当該樹脂を硬化させることにより形成されている。ＣＦＲＰ層２１の樹脂には、例えばエポキシ樹脂、変性エポキシ樹脂、不飽和ポリエステル樹脂等が用いられる。また、補強繊維としては、炭素繊維、金属繊維などが用いられる。   The CFRP layer 21 is formed, for example, by FW molding (filament winding molding), by winding reinforcing fibers impregnated with resin around the outer peripheral surface of the resin liner 20 and the recess 11b of the base 11 and curing the resin. Yes. For the resin of the CFRP layer 21, for example, an epoxy resin, a modified epoxy resin, an unsaturated polyester resin, or the like is used. Further, as the reinforcing fiber, carbon fiber, metal fiber, or the like is used.

口金部１１は、略円筒形状を有し、樹脂ライナ２０の開口部に嵌入されている。口金部１１は、例えばアルミニウム又はアルミニウム合金からなり、例えばダイキャスト法等により所定の形状に製造されている。口金部１１は、例えばインサート成形により樹脂ライナ２０に取り付けられている。なお、ＣＦＲＰ層２１と接触する凹み部１１ｂの表面には、フッ素系の樹脂などの固体潤滑コーティングが施されており、これにより、ＣＦＲＰ層２１と凹み部１１ｂとの間の摩擦係数が低減されている。   The base part 11 has a substantially cylindrical shape and is fitted into the opening of the resin liner 20. The base portion 11 is made of, for example, aluminum or an aluminum alloy, and is manufactured in a predetermined shape by, for example, a die casting method. The base part 11 is attached to the resin liner 20 by, for example, insert molding. The surface of the recess 11b that comes into contact with the CFRP layer 21 is coated with a solid lubricating coating such as a fluorine-based resin, thereby reducing the friction coefficient between the CFRP layer 21 and the recess 11b. ing.

続いて、上述した樹脂ライナ２０の溶着方法について説明する（図３等参照）。   Next, a method for welding the above-described resin liner 20 will be described (see FIG. 3 and the like).

まず、２種類の分割樹脂ライナである透過性樹脂ライナ２０ａおよび吸収性樹脂ライナ２０ｂの溶着対象部分（図３において符号２２で示す）たる端面どうしを突き合わせる（図３参照）。ここで、両樹脂ライナ２０ａ，２０ｂの端面は例えば一方が他方の周囲に被さるように段差が設けられた形状であるが（図４参照）、この他、特に図示はしないが一方を楔状、他方を二股状として他方側の溝に楔の先端を入り込ませる形状などとしてもよい。   First, end surfaces that are welding target portions (indicated by reference numeral 22 in FIG. 3) of the permeable resin liner 20a and the absorbent resin liner 20b, which are two types of divided resin liners, are brought into contact with each other (see FIG. 3). Here, the end surfaces of both the resin liners 20a and 20b have, for example, a shape provided with a step so that one of them covers the other (see FIG. 4). It is good also as a shape etc. which make the front-end | tip of a wedge enter into the groove | channel on the other side.

次に、樹脂ライナ２０を相対的に回転させながら、接合部分（溶着対象部分２２）に２種類のレーザ光Ｌ１，Ｌ２を照射し、透過性樹脂ライナ２０ａおよび吸収性樹脂ライナ２０ｂの溶着対象部分２２を溶融させて混ぜ合わせ、接合する。本実施形態では、樹脂ライナ２０の外側に配置したＹＡＧレーザ光発振器４０からＹＡＧレーザ光Ｌ２を照射し、高圧タンク１のタンク軸上に配置した半導体レーザ光発振器３０から半導体レーザ光Ｌ１を照射することとしている（図３参照）。ＹＡＧレーザ光発振器４０は、両分割樹脂ライナ２０ａ，２０ｂの突き合わされた端面（溶着対象部分２２）に対し、タンク軸方向と垂直にＹＡＧレーザ光Ｌ２を照射するように配置されていることが好ましい。このＹＡＧレーザ光発振器に代え、ＣＯ2レーザ光を発振するＣＯ2レーザ光発振器を用いてもよい。なお、従来のＹＡＧレーザ光やＣＯ2レーザ光は、一般的には樹脂材を切断する際に利用されているものであるから、ＹＡＧレーザ光発振器、ＣＯ2レーザ光発振器とも比較的容易に準備することができるレーザ光発振源である。 Next, while the resin liner 20 is relatively rotated, two types of laser beams L1 and L2 are irradiated to the joining portion (welding target portion 22), and the welding target portions of the transmissive resin liner 20a and the absorbent resin liner 20b. 22 is melted, mixed and joined. In the present embodiment, YAG laser light L2 is irradiated from a YAG laser light oscillator 40 disposed outside the resin liner 20, and semiconductor laser light L1 is irradiated from a semiconductor laser light oscillator 30 disposed on the tank axis of the high-pressure tank 1. (See FIG. 3). The YAG laser beam oscillator 40 is preferably arranged so as to irradiate the YAG laser beam L2 perpendicularly to the tank axial direction with respect to the end surfaces (welding target portions 22) of the two divided resin liners 20a and 20b. . Instead of this YAG laser light oscillator, a CO 2 laser light oscillator that oscillates CO 2 laser light may be used. Since conventional YAG laser light and CO 2 laser light are generally used when cutting resin material, both YAG laser light oscillator and CO 2 laser light oscillator are relatively easily prepared. This is a laser light source that can be used.

また、半導体レーザ光発振器３０は、口金１１の開口から樹脂ライナ２０の内部へと向かう半導体レーザ光Ｌ１をタンク軸に沿って照射する。本実施形態では、樹脂ライナ２０の内部に反射鏡６０を設置し、半導体レーザ光Ｌ１を反射させ、溶着対象部分２２の内側にレーザ光が照射されるようにしている（図３参照）。   In addition, the semiconductor laser light oscillator 30 irradiates the semiconductor laser light L1 from the opening of the base 11 toward the inside of the resin liner 20 along the tank axis. In the present embodiment, the reflecting mirror 60 is installed inside the resin liner 20 to reflect the semiconductor laser light L1 so that the laser light is irradiated to the inside of the welding target portion 22 (see FIG. 3).

半導体レーザ光Ｌ１の波長はおよそ８００〜１０００ｎｍの範囲にある。既述のように、この半導体レーザ光Ｌ１は、透過性樹脂ライナ２０ａを透過し、吸収性樹脂ライナ２０ｂに吸収されて当該吸収性樹脂ライナ２０ｂを発熱させる（図４参照）。一方、ＹＡＧレーザ光Ｌ２およびＣＯ2レーザ光の波長はおよそ１０００ｎｍ以上である。このように本実施形態で用いているＹＡＧレーザ光（またはＣＯ2レーザ光）Ｌ２は半導体レーザ光Ｌ１よりも波長が長いため、半導体レーザ光Ｌ１のように透過性樹脂ライナ２０ａを透過することはなく、その一部または全部が吸収されることによって当該透過性樹脂ライナ２０ａを発熱させる。なお、吸収性樹脂ライナ２０ｂに直接照射された場合のＹＡＧレーザ光（またはＣＯ2レーザ光）Ｌ２は、当然ながら吸収性樹脂ライナ２０ｂに吸収されて当該吸収性樹脂ライナ２０ｂ自体を発熱させる。 The wavelength of the semiconductor laser light L1 is in the range of approximately 800 to 1000 nm. As described above, the semiconductor laser light L1 passes through the transmissive resin liner 20a and is absorbed by the absorbent resin liner 20b to cause the absorbent resin liner 20b to generate heat (see FIG. 4). On the other hand, the wavelengths of the YAG laser light L2 and the CO 2 laser light are approximately 1000 nm or more. As described above, since the YAG laser beam (or CO 2 laser beam) L2 used in this embodiment has a longer wavelength than the semiconductor laser beam L1, the YAG laser beam (or CO 2 laser beam) L2 does not pass through the transparent resin liner 20a like the semiconductor laser beam L1. However, the permeable resin liner 20a is caused to generate heat by being partially or wholly absorbed. Note that the YAG laser beam (or CO 2 laser beam) L2 when directly irradiated to the absorbent resin liner 20b is naturally absorbed by the absorbent resin liner 20b and causes the absorbent resin liner 20b itself to generate heat.

つまり、本実施形態の溶着方法においては、樹脂ライナ２０の表面側から半導体レーザ光Ｌ１を照射して吸収性樹脂ライナ２０ｂを発熱させるばかりでなく、裏面側からはＹＡＧレーザ光Ｌ２を照射して透過性樹脂ライナ２０ａをも発熱させる（直接的に加熱する）ことにより、溶着に要する時間を短縮することを可能としている。参考までに具体例を挙げれば、従来手法によれば十分な溶着を行うために樹脂ライナ２０を５〜１０周程度（例えば９周）回転させることを要していたが、本実施形態によれば２〜３周程度回転させた時点で十分に溶着させることが可能である。   In other words, in the welding method of the present embodiment, not only the semiconductor laser beam L1 is irradiated from the surface side of the resin liner 20 to heat the absorbent resin liner 20b, but also the YAG laser beam L2 is irradiated from the back surface side. The time required for welding can be shortened by causing the permeable resin liner 20a to generate heat (directly heating). As a specific example, for reference, according to the conventional method, it is necessary to rotate the resin liner 20 about 5 to 10 laps (for example, 9 laps) in order to perform sufficient welding. For example, it can be sufficiently welded when it is rotated about 2 to 3 times.

しかも、このように透過性樹脂ライナ２０ａを直接的に加熱することを可能とした本実施形態の溶着方法によれば、レーザ溶着したい局所以外の部位に熱が広がることを抑えることができる。したがって、溶着対象部分２２やその周囲においてバリなどが発生するのを抑制し、これによって従来よりも溶着品質を安定させることが可能である。   In addition, according to the welding method of the present embodiment that enables the transparent resin liner 20a to be directly heated in this way, it is possible to prevent heat from spreading to a portion other than the local region where laser welding is desired. Therefore, it is possible to suppress the occurrence of burrs or the like in the welding target portion 22 and its surroundings, thereby stabilizing the welding quality as compared with the conventional case.

また、本実施形態では、レーザ光が照射される部分の温度ないしはレーザ光照射量を測定装置により測定し、測定結果に基づいて当該レーザ光の照射量を調整することとしている。具体的には、樹脂ライナ２０の外側に計測カメラ５０を配置し、当該計測カメラ５０にて溶着対象部分２２の例えば温度を測定している（図３参照）。計測カメラ５０には、測定対象の物質に赤外線を照射し、透過光あるいは反射光を分光することでスペクトルを得て対象物の特性を検出するＩＲ（赤外分光法）熱画像装置などを利用することができる。このように測定結果に基づきレーザ光の照射量を調整する本実施形態の溶着方法によれば、加熱温度をフィードバック制御して溶着状態をより精度よく緻密に管理することが可能となる。特に、樹脂ライナ２０の外側にＹＡＧレーザ光（あるいはＣＯ2レーザ光）Ｌ２を照射して透過性樹脂ライナ２０ａを直接的に加熱する本実施形態の場合においては、溶着対象部分２２の温度が上がりすぎてしまうのを抑制できるという点でも好適である。加えて、発熱させたい吸収性樹脂ライナ２０ｂにも直接レーザ光を照射する部位を測定するため、温度管理がしやすい。 Further, in the present embodiment, the temperature of the portion irradiated with the laser beam or the laser beam irradiation amount is measured by a measuring device, and the irradiation amount of the laser beam is adjusted based on the measurement result. Specifically, the measurement camera 50 is disposed outside the resin liner 20, and the temperature of the welding target portion 22 is measured by the measurement camera 50 (see FIG. 3). The measurement camera 50 uses an IR (infrared spectroscopy) thermal imaging device that irradiates a substance to be measured with infrared rays and spectrally separates transmitted light or reflected light to obtain a spectrum and detect characteristics of the object. can do. As described above, according to the welding method of the present embodiment in which the irradiation amount of the laser beam is adjusted based on the measurement result, it is possible to more precisely manage the welding state with feedback control of the heating temperature. In particular, in the case of this embodiment in which the outer side of the resin liner 20 is irradiated with YAG laser light (or CO 2 laser light) L2 to directly heat the transparent resin liner 20a, the temperature of the welding target portion 22 increases. It is also preferable in that it can be suppressed from excessively. In addition, the temperature of the absorbent resin liner 20b that is desired to generate heat is easily controlled because the part directly irradiated with the laser beam is measured.

溶着後は、口金部１１，１８が組み付けられていない場合にはこれらを樹脂ライナ２０に組み付け、ＦＷ（フィラメントワインディング）成形を行う。ＦＷ成形後、当該高圧タンク１を加熱硬化して完成品を得る。   After the welding, when the base parts 11 and 18 are not assembled, they are assembled to the resin liner 20 and FW (filament winding) molding is performed. After FW molding, the high-pressure tank 1 is heated and cured to obtain a finished product.

以上説明したように、複数種類のレーザ光Ｌ１，Ｌ２の波長の違いを利用する本実施形態の溶着方法においては、波長の短いレーザ光（Ｌ１）で従来と同様の加熱を行うと同時に、従来は間接的にしか加熱できなかった部分を波長の長いレーザ光（Ｌ２）によって直接的に加熱することが可能である。このような溶着方法によれば、溶着対象部分２２やその周辺における温度管理がしやすく、例えば高圧タンク１の性能に影響するバリ等の発生を抑えることができる。また、溶着手段として２種類のレーザ光Ｌ１，Ｌ２を利用しているため、溶着したい部分においてのみ発熱させやすく、溶着品質を安定させやすい。さらに、樹脂ライナ２０の表裏両面からレーザ光Ｌ１，Ｌ２を照射する本実施形態においては、従来よりも短い時間でレーザ溶着を完了させることが可能である。   As described above, in the welding method of the present embodiment that uses the difference in wavelength between the plurality of types of laser beams L1 and L2, the conventional heating is performed with the laser beam (L1) having a short wavelength, and at the same time, Can directly heat a portion that can only be heated indirectly by a laser beam (L2) having a long wavelength. According to such a welding method, it is easy to manage the temperature in the welding target portion 22 and its surroundings, and for example, occurrence of burrs that affect the performance of the high-pressure tank 1 can be suppressed. In addition, since two types of laser beams L1 and L2 are used as welding means, heat is easily generated only at a portion where welding is desired, and the welding quality is easily stabilized. Further, in the present embodiment in which the laser beams L1 and L2 are irradiated from both the front and back surfaces of the resin liner 20, laser welding can be completed in a shorter time than in the past.

なお、上述の実施形態は本発明の好適な実施の一例ではあるがこれに限定されるものではなく本発明の要旨を逸脱しない範囲において種々変形実施可能である。例えば上述した実施形態では、透過性樹脂ライナ２０ａおよび吸収性樹脂ライナ２０ｂの端面どうしを単に突き合わせた状態で溶着する場合について説明したが、必要に応じ、両樹脂を密着させるための外力を作用させながらレーザ光Ｌ１，Ｌ２を照射することが好ましい。特に、両樹脂の接合部分に隙間が発生しやすい場合は、溶着対象部分２２以外にも熱が伝わりやすくバリ等が発生することがある等、加熱温度の管理が難しくなるので、外力を作用させてこのような問題を回避することが好適である。   The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the case where welding is performed in a state where the end surfaces of the permeable resin liner 20a and the absorbent resin liner 20b are merely brought into contact with each other has been described. However, it is preferable to irradiate the laser beams L1 and L2. In particular, if a gap is likely to occur at the joint between the two resins, it is difficult to manage the heating temperature, for example, burrs may occur due to heat being easily transmitted in addition to the portion to be welded 22. It is preferable to avoid such problems.

また、上述の実施形態では高圧タンク１を構成する２つの樹脂ライナ２０ａ，２０ｂを接合する際の溶着方法について説明したが、これは溶着対象の一例にすぎない。このような樹脂ライナ２０ａ，２０ｂの他、例えば自動車用のインテークマニホールド、ＥＣＵやセンサのボックス、ランプのケーシング、燃料タンクなど、樹脂部材どうしを接合することにより形成される各種部品に本発明にかかる溶着方法を適用することが可能である。しかも、これら各種部品にレーザ溶着方法を適用することには、締結部品や接着剤を廃止すること、形状の自由度を拡大し生産性を向上させることといったことが可能になるという利点もある。   Moreover, although the above-mentioned embodiment demonstrated the welding method at the time of joining the two resin liners 20a and 20b which comprise the high pressure tank 1, this is only an example of the welding object. In addition to the resin liners 20a and 20b, various parts formed by joining resin members such as an intake manifold for an automobile, a box for an ECU or a sensor, a casing for a lamp, a fuel tank, and the like according to the present invention. It is possible to apply a welding method. In addition, applying the laser welding method to these various parts also has the advantage that it is possible to eliminate fastening parts and adhesives, increase the degree of freedom in shape, and improve productivity.

さらに、上述の実施形態で例示した溶着対象は湾曲している円筒状の樹脂ライナ２０ａ，２０ｂであるが、これも好適な一例にすぎず、この他、板状の樹脂部材どうしを接合させる等の場合にも本発明を適用することができる。また、上述の実施形態では、樹脂ライナ２０ａ，２０ｂの表裏両面からそれぞれ種類の異なるレーザ光Ｌ１，Ｌ２を照射したが、場合によっては片面からのみレーザ光Ｌ１，Ｌ２を照射することとしても構わない。例えば、ある基準面上で板状の樹脂部材を両側から加圧して接合部分どうしを突き合わせようとすると、裏側からレーザ光を照射することが困難な場合がある。このような場合であっても、種類の異なるレーザ光（例えば半導体レーザ光Ｌ１とＹＡＧレーザ光Ｌ２）を表面側からのみ同時に照射することができ、こうすることによっても上述した実施形態と同様の作用により、溶着時間を短縮させ、溶着品質をより安定化させることが可能である。   Furthermore, the welding target illustrated in the above-described embodiment is the curved cylindrical resin liners 20a and 20b. However, this is also only a suitable example, and other plate-like resin members are joined together. In this case, the present invention can be applied. In the above-described embodiment, different types of laser beams L1 and L2 are irradiated from both the front and back surfaces of the resin liners 20a and 20b. However, in some cases, the laser beams L1 and L2 may be irradiated only from one side. . For example, if a plate-shaped resin member is pressed from both sides on a certain reference surface to try to abut the joining portions, it may be difficult to irradiate laser light from the back side. Even in such a case, different types of laser beams (for example, the semiconductor laser beam L1 and the YAG laser beam L2) can be irradiated simultaneously only from the surface side. By the action, it is possible to shorten the welding time and further stabilize the welding quality.

また、上述の実施形態では、波長の長いレーザ光（ＹＡＧレーザ光Ｌ２あるいはＣＯ2レーザ光）を樹脂ライナ２０ａ，２０ｂの外側から、波長の短いレーザ光（半導体レーザ光Ｌ１）を樹脂ライナ２０ａ，２０ｂの内側からそれぞれ照射する例を示したが、外側と内側を逆にした態様によって溶着を行うことももちろん可能である。ただ、波長の長いレーザ光を照射した部位の方が波長の短いレーザ光を照射した部位よりも温度上昇しやすいことを勘案すると、外側から波長の短いレーザ光を照射することは、より高温となりやすい湾曲状樹脂ライナ２０ａ，２０ｂの外側面を計測カメラ５０によって測定しやすくなるという利点がある。 In the above-described embodiment, laser light having a long wavelength (YAG laser light L2 or CO 2 laser light) is applied from the outside of the resin liners 20a and 20b, and laser light having a short wavelength (semiconductor laser light L1) is applied to the resin liner 20a, Although the example which irradiates from the inside of 20b was shown, respectively, of course, it is also possible to perform welding by the aspect which reversed the outer side and the inner side. However, considering that the temperature of the part irradiated with laser light having a long wavelength is more likely to rise than the part irradiated with laser light having a short wavelength, irradiation with laser light having a short wavelength from the outside becomes a higher temperature. There exists an advantage that it becomes easy to measure the outer side surface of the easy curved resin liner 20a, 20b with the measurement camera 50.

さらに、半導体レーザ光Ｌ１よりも波長の長いレーザ光として上述の実施形態で説明したのはＹＡＧレーザ光Ｌ２およびＣＯ2レーザ光であるが、これらも例示にすぎない。要は、本明細書でいう波長の長いレーザ光は、波長の短いレーザ光（例えば半導体レーザ光Ｌ１）が透過するレーザ光透過材において少なくとも一部が吸収され、当該レーザ光透過材自体を発熱させることのできるレーザ光であれば足りる。また、このような波長の長いレーザ光の具体例として上述の実施形態ではおよそ１０００ｎｍ以上であると説明したが、これは波長の短いレーザ光の波長、レーザ光透過材およびレーザ光吸収材の材質や特性などに応じて変わりうるものであり、当該波長がこのような範囲に限定されることはない。ここで、レーザ光透過材およびレーザ光吸収材の材質の他の具体例を挙げておく。レーザ光透過材には例えばポリカーボネート、アクリル、ＰＢＴ近似ＰＥ材などがある。また、レーザ光吸収材（非透過材）には例えばＰＢＴ、ＡＢＳ、多層ＰＥ材、ＰＡとポリオレフィンのアロイ材などがある。 Furthermore, the YAG laser light L2 and the CO 2 laser light described in the above embodiment as laser light having a wavelength longer than that of the semiconductor laser light L1 are merely examples. In short, the laser light having a long wavelength referred to in this specification is at least partially absorbed by the laser light transmitting material through which the laser light having a short wavelength (for example, the semiconductor laser light L1) is transmitted, and the laser light transmitting material itself generates heat. Any laser beam that can be generated is sufficient. Further, as a specific example of such a long-wavelength laser beam, the above-described embodiment has been described as having a wavelength of about 1000 nm or more. This is because the wavelength of the short-wavelength laser beam, the material of the laser beam transmitting material, and the laser beam absorbing material The wavelength can be changed according to the characteristics and the like, and the wavelength is not limited to such a range. Here, other specific examples of the material of the laser beam transmitting material and the laser beam absorbing material will be given. Examples of the laser light transmitting material include polycarbonate, acrylic, and PBT approximate PE material. Examples of the laser light absorbing material (non-transmitting material) include PBT, ABS, multilayer PE material, and alloy material of PA and polyolefin.

本発明の一実施形態における高圧タンクの断面を示す図である。It is a figure which shows the cross section of the high pressure tank in one Embodiment of this invention. ２種類の分割樹脂ライナの概略断面図である。It is a schematic sectional drawing of two types of split resin liners. 樹脂ライナ、レーザ発振器、計測カメラ等の全体を概略的に示す図である。It is a figure which shows roughly the whole resin liner, a laser oscillator, a measurement camera, etc. 半導体レーザ光を用いた従来の溶着方法を説明するために参考として示す樹脂ライナの部分断面図である。It is a fragmentary sectional view of the resin liner shown as a reference in order to explain the conventional welding method using a semiconductor laser beam.

符号の説明Explanation of symbols

２０…樹脂ライナ（樹脂）、２２…溶着対象部分、５０…計測カメラ（測定装置）、Ｌ１…半導体レーザ光（所定値よりも波長の短いレーザ光）、Ｌ２…ＹＡＧレーザ光（所定値よりも波長の長いレーザ光） DESCRIPTION OF SYMBOLS 20 ... Resin liner (resin), 22 ... Welding object part, 50 ... Measurement camera (measuring device), L1 ... Semiconductor laser beam (laser beam whose wavelength is shorter than predetermined value), L2 ... YAG laser beam (than predetermined value Long wavelength laser light)

Claims (8)

樹脂の溶着方法であって、所定値よりも波長の長いレーザ光と、前記所定値よりも波長の短いレーザ光とを当該樹脂の溶着対象部分に照射する、樹脂の溶着方法。   A resin welding method, wherein a laser beam having a wavelength longer than a predetermined value and a laser beam having a wavelength shorter than the predetermined value are irradiated to a portion to be welded of the resin. 前記波長の短いレーザ光として半導体レーザ光を用い、前記波長の長いレーザ光としてＹＡＧレーザ光またはＣＯ2レーザ光を用いる、請求項１に記載の樹脂の溶着方法。 The resin welding method according to claim 1, wherein a semiconductor laser beam is used as the laser beam having a short wavelength, and a YAG laser beam or a CO 2 laser beam is used as the laser beam having a long wavelength. 前記樹脂は、少なくとも２つの樹脂ライナである、請求項２に記載の樹脂の溶着方法。   The resin welding method according to claim 2, wherein the resin is at least two resin liners. 前記波長の長いレーザ光を前記樹脂ライナの外側から、前記波長の短いレーザ光を前記樹脂ライナの内側からそれぞれ照射する、請求項３に記載の樹脂の溶着方法。   The resin welding method according to claim 3, wherein the laser light having a long wavelength is irradiated from the outside of the resin liner and the laser light having a short wavelength is irradiated from the inside of the resin liner. 前記レーザ光を反射鏡にて反射させて前記樹脂ライナに照射する、請求項４に記載の樹脂の溶着方法。   The resin welding method according to claim 4, wherein the resin liner is irradiated with the laser light reflected by a reflecting mirror. 前記レーザ光が照射される部分の温度ないしはレーザ光照射量を測定装置により測定し、測定結果に基づいて当該レーザ光の照射量を調整する、請求項１から５のいずれか一項に記載の樹脂の溶着方法。   The temperature or the laser beam irradiation amount of the portion irradiated with the laser beam is measured by a measuring device, and the laser beam irradiation amount is adjusted based on the measurement result. Resin welding method. 前記樹脂どうしを密着させるための外力を作用させながら前記レーザ光を照射する、請求項１から６のいずれか一項に記載の樹脂の溶着方法。   The resin welding method according to any one of claims 1 to 6, wherein the laser light is irradiated while applying an external force for bringing the resins into close contact with each other. 請求項１から７のいずれか一項に記載の溶着方法を使用して分割樹脂ライナを溶着する、タンク製造方法。   The tank manufacturing method of welding a division | segmentation resin liner using the welding method as described in any one of Claim 1 to 7.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014084543A (en) * 2012-10-24 2014-05-12 Toyota Industries Corp Three-dimensional fiber structure
JP2019014228A (en) * 2017-07-05 2019-01-31 東レ株式会社 Method for producing a hollow molded article made of a resin having a welded portion

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JP2005313475A (en) * 2004-04-28 2005-11-10 Sumitomo Electric Ind Ltd Resin processing method and resin processing apparatus

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005313475A (en) * 2004-04-28 2005-11-10 Sumitomo Electric Ind Ltd Resin processing method and resin processing apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014084543A (en) * 2012-10-24 2014-05-12 Toyota Industries Corp Three-dimensional fiber structure
JP2019014228A (en) * 2017-07-05 2019-01-31 東レ株式会社 Method for producing a hollow molded article made of a resin having a welded portion
JP7063046B2 (en) 2017-07-05 2022-05-09 東レ株式会社 A method for manufacturing a hollow molded product made of a resin having a welded portion.

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