JP5342538B2 - Resistance heating element for hot welding - Google Patents

Resistance heating element for hot welding Download PDF

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Publication number
JP5342538B2
JP5342538B2 JP2010252855A JP2010252855A JP5342538B2 JP 5342538 B2 JP5342538 B2 JP 5342538B2 JP 2010252855 A JP2010252855 A JP 2010252855A JP 2010252855 A JP2010252855 A JP 2010252855A JP 5342538 B2 JP5342538 B2 JP 5342538B2
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JP
Japan
Prior art keywords
heating element
resistance heating
welding
heat
resin
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Expired - Fee Related
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JP2010252855A
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Japanese (ja)
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JP2012101475A (en
Inventor
正秋 鹿野
武 羽入
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ムネカタ株式会社
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Priority to JP2010252855A priority Critical patent/JP5342538B2/en
Publication of JP2012101475A publication Critical patent/JP2012101475A/en
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Publication of JP5342538B2 publication Critical patent/JP5342538B2/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B29C65/3428—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding said at least a single wire having a waveform, e.g. a sinusoidal form
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B29C65/3432—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding comprising several wires, e.g. in the form of several independent windings
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3444—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3444—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip
    • B29C65/3448—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip said ribbon, band or strip being perforated
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • 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
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12443—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue having the tongue substantially in the middle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
    • B29C66/24244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle
    • B29C66/24245—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle forming a square
    • 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
    • B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
    • B29C66/3034—Particular design of joint configurations the joint involving an anchoring effect making use of additional elements, e.g. meshes
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82—Testing the joint
    • B29C65/8207—Testing the joint by mechanical methods
    • B29C65/8246—Pressure tests, e.g. hydrostatic pressure tests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being in the form of a sinusoidal wave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/223—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being in the form of a triangle wave or of a sawtooth wave, e.g. zigzagged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/225—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being castellated, e.g. in the form of a square wave or of a rectangular wave
    • 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
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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
    • B29C66/72—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
    • B29C66/721—Fibre-reinforced materials
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81261—Thermal properties, e.g. thermal conductivity, thermal expansion coefficient
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resistance heating element for heat welding which can raise welding strength and sealability. <P>SOLUTION: The resistance heating element is made in the following. Cuts 2 are alternately formed along both edges of the resistance heating element 1. When the resistance heating element 1 is assembled in a welding channel 11 formed in a welding face of a member 10 to be welded, and an electric voltage is loaded on an electricity feeding parts 3 and 3a of the resistance heating element 1 while the welding rib 13 on the member 12 to be welded side is pressed on the resistance heating element 1, the resistance heating element 1 generates heat, and a resin surrounding this is melted by this heat, and the melted resin enters the cuts 2 of the resistance heating element 1, and the resistance heating element 1 is strongly fixed at the welded part when it is solidified. As the result, cracks or the like are prevented from being generated in the welded part caused by a stress accompanied by stretching and contraction of the resistance heating element 1 to be generated caused by a difference in coefficients of thermal expansion of the resistance heating element 1 and the resin, and the welding strength and the sealability are raised thereby. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

本発明は、熱可塑性樹脂で成形された成形品同士の接合面に抵抗発熱体を挟み込み、この抵抗発熱体に電圧を印加して発熱させることにより接合面の溶融を図り、更に接合面間に面圧をかけて接合面同士を熱溶着する際に用いられる熱溶着用抵抗発熱体に関するものである。   In the present invention, a resistance heating element is sandwiched between bonding surfaces of molded products formed of a thermoplastic resin, a voltage is applied to the resistance heating element to generate heat, and the bonding surfaces are melted. The present invention relates to a resistance heating element for heat welding used when heat-welding bonding surfaces by applying a surface pressure.

熱可塑性樹脂で成形されたお互いの成形品を接合する方法の一つとして、その接合面に電気抵抗に基づく抵抗発熱体を挟み込み、成形品を適宜な力で押圧しながら前記抵抗発熱体に電圧を印加して発熱させ、その熱で接合面の樹脂を溶融し、その後、電圧の印加を止めて冷却することにより溶着した樹脂を冷却硬化させて成形品同士を溶着する熱溶着方法と抵抗発熱体が特許文献１に紹介されている。   As one of the methods for joining the molded products made of thermoplastic resin, a resistance heating element based on electric resistance is sandwiched between the joined surfaces, and a voltage is applied to the resistance heating element while pressing the molded product with an appropriate force. Heat and melt the resin on the bonding surface with the heat, then stop the application of voltage and cool to cool and cure the welded resin and weld the molded parts together and resistance heating The body is introduced in Patent Document 1.

ここで紹介されている抵抗発熱体の場合、その一例として、溶着強度を高めるためにこの抵抗発熱体に孔１３を設け、この孔１３を経由して被溶着体の樹脂が強固に結合するようにしている。   In the case of the resistance heating element introduced here, as an example, a hole 13 is provided in the resistance heating element in order to increase the welding strength, and the resin of the object to be welded is firmly bonded via the hole 13. I have to.

又、特許文献２には、抵抗発熱体が発熱したときの軸線方向の伸びを逃がす手段として、発熱体の一部に逃し部６２を形成した技術が開示されている。   Patent Document 2 discloses a technique in which a relief portion 62 is formed in a part of the heating element as means for releasing the elongation in the axial direction when the resistance heating element generates heat.

特開昭５８−５９０５０号公報JP 58-59050 A 特開２００５−３１９５９７号公報JP 2005-319597 A

しかし乍ら、前記した特許文献１において、溶着強度を高めるために発熱体に孔１３を設けた場合、この孔１３を経由しての溶着による溶着強度の向上は見込めるが、通常使用される発熱体は、溶着が終った後はただの挟雑物として接合面内に残り、この部分では溶着が無く、強度不足の原因となることから、溶着強度を高めるために発熱体が偏平な場合には、その幅は可能な限り小さく設定されている。   However, in Patent Document 1 described above, when the heating element is provided with the hole 13 in order to increase the welding strength, it is expected that the welding strength is improved by welding through the hole 13, but the heat generation that is normally used is expected. The body remains in the joint surface as a mere interstitial material after the welding is finished, and there is no welding in this part, which causes insufficient strength, so if the heating element is flat to increase the welding strength The width is set as small as possible.

例えば、通常の発熱体の場合、その幅は０．５〜２．０ｍｍであり、ここに孔１３を設ける場合、この孔１３の直径は０．２〜１．０ｍｍが限度となるが、特にこの幅の小さい発熱体の場合は、孔１３の直径は極めて小径となり、孔を形成した効果は極めて小さくなる。   For example, in the case of a normal heating element, the width is 0.5 to 2.0 mm, and when the hole 13 is provided here, the diameter of the hole 13 is limited to 0.2 to 1.0 mm. In the case of a heating element having such a small width, the diameter of the hole 13 is extremely small, and the effect of forming the hole is extremely small.

また、発熱体は常温から２５０℃〜３５０℃まで急激に加熱され一気に熱膨張し、固化時、つまり冷却時には発熱体が収縮し、この収縮により溶着部において樹脂側に大きな負荷が発生し、この負荷により溶着部に亀裂が発生して強度及びシール性が低下する要因となる。   In addition, the heating element is rapidly heated from room temperature to 250 ° C. to 350 ° C. and expands at a stretch, and when solidified, that is, cooled, the heating element contracts, and this contraction generates a large load on the resin side at the welded portion. A crack is generated in the welded portion due to the load, which causes a decrease in strength and sealability.

また、発熱体に孔１３が設けてあると、この孔１３の両サイドの発熱体の断面積は孔１３の無い部分に比較して数分の１となり、この孔１３の部分における発熱量は、電気発熱の特性から孔の無い部分に比較して高温となり、この高温と低温が発熱体の長手方向において繰り返しとなる。   Further, if the heat generating body is provided with holes 13, the cross-sectional area of the heat generating elements on both sides of the hole 13 is a fraction of that of the portion without the holes 13, and the amount of heat generated in the hole 13 portion is Due to the characteristics of electric heat generation, the temperature is higher than that of the portion without holes, and this high temperature and low temperature are repeated in the longitudinal direction of the heating element.

このため、熱膨張と収縮率の差の繰り返しが長手方向において発生し、これが樹脂側に負荷を与え、亀裂発生やシール性低下の要因となる。   For this reason, the repetition of the difference between the thermal expansion and the contraction rate occurs in the longitudinal direction, which gives a load to the resin side and causes cracking and deterioration of the sealing performance.

また、引用文献２の抵抗発熱体においては、逃がし部で線膨張を吸収することはできても、収縮時にはこの逃がし部において固化した樹脂が収縮抵抗となり、この逃がし部に応力が集中して亀裂等の要因となり、実用化には問題がある。   Further, in the resistance heating element of Cited Document 2, even though the linear expansion can be absorbed by the escape portion, the resin solidified in the escape portion becomes the shrinkage resistance during the contraction, and stress concentrates on the escape portion and cracks occur. There is a problem in practical use.

本発明は、上記課題を解決するため、請求項１に記載の発明は、熱可塑性樹脂で成形さ
れた成形品同士の四角形を呈した接合面に断面偏平四角形リング状の抵抗発熱体を挟み込み、この抵抗発熱体に電圧を印加して発熱させることにより成形品同士の接合面の溶融を図り、更に接合面間に面圧をかけて接合面同士を熱溶着する方法に用いられる抵抗発熱体において、その各コーナー部分を円曲させると共にこの円曲させたコーナー部分であって、その左右のエッジ部分に交互に切り込みを形成したことを特徴とするものである。 The present invention, in order to solve the above problems, a first aspect of the present invention, sandwiching the cross section flat rectangular-ring shaped resistance heating element on the bonding surface which exhibits a square molded article between molded thermoplastic resin The resistance heating element is used in a method in which a voltage is applied to the resistance heating element to generate heat so as to melt the joining surfaces of the molded products, and the joining surfaces are thermally welded by applying a surface pressure between the joining surfaces. In FIG. 5, the corner portions are curved and the corner portions are curved, and cuts are alternately formed in the left and right edge portions.

また、請求項２に記載の発明は、請求項１に記載の熱溶着用抵抗発熱体において、前記切り込みは、平面視コ字状又はＶ字状又は円弧状又はＩ字状を呈していることを特徴とするものである。 The invention according to claim 2 is the resistance heating element for hot welding according to claim 1, wherein the cut has a U-shape, a V-shape, an arc shape, or an I-shape in plan view. It is characterized by.

本発明の効果は次のとおりである。   The effects of the present invention are as follows.

本発明によると、抵抗発熱体の両エッジにおいて交互に形成された切り込み部分においては被溶着物双方の溶融した樹脂が切り込み内に入り込み、この切り込み内においても互いに融合するため、切り込みの無い抵抗発熱体に比較して１４〜３７％溶着強度をアップすることができる。   According to the present invention, in the incised portions formed alternately at both edges of the resistance heating element, the molten resin of both of the objects to be welded enters the incision and fuses with each other even in this incision, so that the resistance heat generation without incision Compared to the body, the welding strength can be increased by 14 to 37%.

この点、抵抗発熱体に孔を設けた引用文献１の場合、孔の部分においては溶着強度のアップは図れるが、孔と孔との間の部分においてはこの強度アップが図れないことから、軸線方向において強度的に高い部分と低い部分の繰り返しとなり、連続的に切り込みを形成した本発明に比較して強度は２０〜５０％低下する。   In this respect, in the case of the cited reference 1 in which a hole is formed in the resistance heating element, the welding strength can be increased in the hole portion, but the strength cannot be increased in the portion between the holes. In the direction, a portion having high strength and a portion having low strength are repeated, and the strength is reduced by 20 to 50% as compared with the present invention in which continuous cuts are formed.

また、抵抗発熱体に形成した特許文献１の孔の場合、抵抗発熱体が収縮する際に発生する剪断応力は孔の径で決まるが、抵抗発熱体のエッジに沿って切り込みを形成し、この切り込み内において溶着を図る本発明の場合、この切り込み内に入り込んだ樹脂は独立せず、被溶着物側とは上下方向及び左右方向においてそれぞれ一体化しているため、軸線方向に作用する剪段応力が高い。   Further, in the case of the hole of Patent Document 1 formed in the resistance heating element, the shear stress generated when the resistance heating element contracts is determined by the diameter of the hole, but a notch is formed along the edge of the resistance heating element. In the case of the present invention in which welding is performed in the notch, the resin that has entered the notch is not independent, and is integrated with the material to be welded in the vertical and horizontal directions, so that the shearing stress acting in the axial direction. Is expensive.

この結果、溶着部に発生する亀裂等の障害を抑えて溶着強度のアップとシール性の向上を図ることができる。   As a result, obstacles such as cracks occurring in the welded portion can be suppressed to increase the welding strength and improve the sealing performance.

また、熱溶着の場合、抵抗発熱体の温度は約２５０〜３５０℃にその発熱を制御するため、樹脂から溶融ガスが発生するが、引用文献１の場合、抵抗発熱体の下方の樹脂から発生した溶融ガスは孔と孔の間からは上方に逃げることが出来ないため、最終的には微量の溶融ガスが残留してしまい、溶着強度に悪影響が出る。   Further, in the case of heat welding, the temperature of the resistance heating element is controlled to about 250 to 350 ° C., so that a molten gas is generated from the resin. In the case of the cited reference 1, it is generated from the resin below the resistance heating element. Since the melted gas cannot escape upward between the holes, a trace amount of the melted gas is finally left, which adversely affects the welding strength.

一方、抵抗発熱体の左右のエッジに沿って交互に切り込みを形成すると、溶融ガスはこの左右の切り込みから上方に均一に逃げることができるため、残留ガスによる溶着強度への影響は少ない。   On the other hand, if the cuts are alternately formed along the left and right edges of the resistance heating element, the molten gas can escape uniformly upward from the left and right cuts, and therefore the residual gas has little influence on the welding strength.

また、本発明は、抵抗発熱体の左右のエッジに沿って交互に切り込みを形成したことにより、軸線方向への膨張時に、この切り込みにより発生した隙間で膨張した分を吸収するため、抵抗発熱体が線膨張したときに溝内において左右あるいは上下方向に変形したりすることがなく、溶着強度に悪影響が出ない。   In addition, since the present invention alternately forms cuts along the left and right edges of the resistance heating element, when the expansion in the axial direction is absorbed, the resistance heating element absorbs the portion expanded by the gap generated by the cutting. When the wire expands, it does not deform left and right or up and down in the groove, and the welding strength is not adversely affected.

一方、引用文献１の場合、孔は抵抗発熱体の中央に形成されているため、抵抗発熱体自体はテープ状を呈していることから、孔で線膨張を吸収することはできず、線膨張時に抵抗発生体が変形して溶着強度に悪影響が出る。   On the other hand, in the case of the cited document 1, since the hole is formed at the center of the resistance heating element, the resistance heating element itself has a tape shape, and therefore the hole cannot absorb the linear expansion. Sometimes the resistance generator is deformed and the welding strength is adversely affected.

以上のように、本発明によると、引用文献１の抵抗発熱体に比較して溶着強度及び亀裂等の要因発生防止において顕著な効果がある。   As described above, according to the present invention, there is a remarkable effect in preventing the occurrence of factors such as welding strength and cracks as compared with the resistance heating element of Cited Document 1.

特に、成形品が温度差の大きい環境の下に置かれるとき、そして、毎日この繰り返しの熱影響を受ける環境下に置かれるとき、樹脂に対して金属である発熱体の熱膨張率は１ケタ違う（小さい）ことから、抵抗発熱体と樹脂の溶着境界面には繰り返し応力が発生し、溶着強度の低下が経時的に発生する機会が多く、このような問題の解消に本発明は有効である。   In particular, when the molded product is placed in an environment with a large temperature difference, and when it is placed in an environment that is repeatedly affected by heat every day, the coefficient of thermal expansion of the heating element that is a metal relative to the resin is one digit. Due to the difference (small), repeated stress is generated at the welding interface between the resistance heating element and the resin, and there are many opportunities for the decrease in welding strength over time, and the present invention is effective in solving such problems. is there.

抵抗発熱体の左右のエッジに沿って交互にコ字状の切り込みを形成した例の説明図。Explanatory drawing of the example which formed the U-shaped cut | alternation alternately along the right-and-left edge of a resistance heating element. Ｖ字状の切り込みを形成した例の説明図。Explanatory drawing of the example which formed the V-shaped notch. 円弧状の切り込みを形成した例の説明図。Explanatory drawing of the example which formed the circular arc-shaped notch. Ｉ字状の切り込みを形成した例の説明図。Explanatory drawing of the example which formed the I-shaped notch. 閉形状の抵抗発熱体を２等分割した例の説明図。Explanatory drawing of the example which divided the closed-shaped resistance heating element into two equal parts. 四角形状の抵抗発熱体の説明図。Explanatory drawing of a square-shaped resistance heating element. 四角形の抵抗発熱体においてコーナー部分に切り込みを形成した例の説明図。Explanatory drawing of the example which formed the notch in the corner part in a square resistance heating element. 直線状の抵抗発熱体の説明図。Explanatory drawing of a linear resistance heating element. （Ａ），（Ｂ）樹脂成形品を熱溶着する形態の説明図であって、（Ａ）は被溶着物に抵抗発熱体を組み付ける直前の説明図、（Ｂ）は抵抗発熱体に電圧を印加するために給電部に電極を結んだ状態の説明図。(A), (B) It is explanatory drawing of the form which heat-welds a resin molded product, Comprising: (A) is explanatory drawing just before attaching a resistance heating element to a to-be-welded object, (B) is voltage to a resistance heating element. Explanatory drawing of the state which tied the electrode to the electric power feeding part in order to apply. （Ａ）〜（Ｅ）熱溶着工程の説明図。(A)-(E) Explanatory drawing of a heat welding process. 比較例に使用した抵抗発熱体の説明図。Explanatory drawing of the resistance heating element used for the comparative example.

本発明は、熱可塑性樹脂で成形された成形品同士の接合面に抵抗発熱体を挟み込み、この抵抗発熱体に電圧を印加して発熱させることにより接合面の溶融を図り、更に接合面間に面圧をかけて接合面同士を熱溶着するもので、対象となる熱可塑性樹脂の種類としては次のようなものを挙げることができる。   In the present invention, a resistance heating element is sandwiched between bonding surfaces of molded products formed of a thermoplastic resin, a voltage is applied to the resistance heating element to generate heat, and the bonding surfaces are melted. The joining surfaces are thermally welded by applying a surface pressure, and the following types of thermoplastic resins can be mentioned.

ＡＢＳ、ＰＰ、ＰＳ、ＰＥ、ＰＣ、ＰＯＭ、ＰＭＭＡ、ＰＢＴ、ＡＢＳとＰＣのアロイ、ＰＰＳ、ＰＰＡ、ＰＥＴ、ＬＣＰ、ＰＡなどの熱可塑性樹脂が代表例として挙げられるが、これについても限定するものではない。また、ガラスフィラー入り等の強化材を樹脂に混合したものにも適用が可能である。   ABS, PP, PS, PE, PC, POM, PMMA, PBT, ABS and PC alloy, PPS, PPA, PET, LCP, PA and other thermoplastic resins are listed as representative examples. is not. Moreover, the present invention can also be applied to a material in which a reinforcing material containing glass filler is mixed with a resin.

抵抗発熱体の材料としては、ＳＵＳ、ＳＥＣＣ、ＳＰＣＣ、ＮＣＨＷ等が代表例として挙げられるがこれに限定するものではない。   Examples of the material of the resistance heating element include SUS, SECC, SPCC, NCHW, and the like, but are not limited thereto.

抵抗発熱体は、上記例示した材質の平板材をプレス加工又はレーザー加工又はワイヤーカット加工等で形成する。   The resistance heating element is formed by press processing, laser processing, wire cutting processing, or the like of the flat plate material of the above-exemplified material.

図１〜図６は抵抗発熱体の実施形態の参考例を表すもので、図１〜図５は円形、図６は四角形状である。但し、図５は円形を２等分割した形態である。 FIGS. 1-6 represents the reference example of embodiment of a resistance heating element, FIGS. 1-5 is circular and FIG. 6 is square shape. However, FIG. 5 shows a form in which a circle is divided into two equal parts.

これらの形態において、図１の抵抗発熱体１には、その両エッジ（内縁と外縁）に沿って等間隔にコ字状の切り込み２…が形成されており、板厚は１．０ｍｍ、板幅は１．５ｍｍ、給電部３、３ａの板幅は３．０ｍｍ、長さは８ｍｍ、コ字状の切り込み２…の幅は０．５ｍｍ、深さ（奥行）は１．０ｍｍ、切り込み２…のピッチは２．０ｍｍである。   In these forms, the resistance heating element 1 of FIG. 1 is formed with U-shaped cuts 2 at equal intervals along both edges (inner edge and outer edge), and has a plate thickness of 1.0 mm. The width is 1.5 mm, the plate width of the power feeding sections 3 and 3 a is 3.0 mm, the length is 8 mm, the width of the U-shaped cut 2 is 0.5 mm, the depth (depth) is 1.0 mm, and the cut 2 The pitch of ... is 2.0 mm.

図２はＶ字状の切り込み２ａ…を形成した例、図３は円弧形状の切り込み２ｂを形成した例、図４はＩ字状の切り込み２ｃを形成した例である。   2 is an example in which V-shaped cuts 2a are formed, FIG. 3 is an example in which arc-shaped cuts 2b are formed, and FIG. 4 is an example in which I-shaped cuts 2c are formed.

図５は、図１〜図４が閉形状であるのに対し、給電部３、３ａ間で２等分割した例である。   FIG. 5 shows an example in which FIGS. 1 to 4 are closed, whereas the power feeding units 3 and 3a are divided into two equal parts.

図６は四角形状の抵抗発熱体１の全体に切り込み２を形成した例である。 FIG. 6 shows an example in which a cut 2 is formed in the entire rectangular resistance heating element 1.

図７は本発明に係る断面偏平四角形リング状の抵抗発熱体１において、その円曲した各コーナー部１ａの左右のエッジ部分に、交互に切り込み２…を形成した例である。 Figure 7 is the sectional flat rectangular-ring shaped resistance heating element 1 according to the present invention, the left and right edges of each corner portion 1a and the circle song, Ru example der forming a 2 ... cut alternately.

図８は直線状を呈した抵抗発熱体１であって、溶着部が直線状を呈した成形品の溶着に用いられる。   FIG. 8 shows a resistance heating element 1 having a linear shape, which is used for welding a molded product having a linear welded portion.

以上に説明した抵抗発熱体１の寸法及び形状、切り込み２の形状等は、溶着部の形状、材質などに合わせて最適な発熱と溶着条件となるように選定する。   The dimensions and shape of the resistance heating element 1 described above, the shape of the notch 2, and the like are selected so as to achieve optimum heat generation and welding conditions according to the shape and material of the welded portion.

次に、上記した抵抗発熱体１を用いて行う熱溶着工程を図９及び図１０に基づいて説明する。   Next, the heat welding process performed using the resistance heating element 1 will be described with reference to FIGS.

図９は溶着装置を示すもので、被溶着部材１０はテーブル上に固定され、被溶着部材１２は上下動する可動部材に固定される。そして、被溶着部材１０の溶着面には凹状の溶着溝１１が形成され、被溶着部材１２側には前記溶着溝１１に上方から侵入できる寸法の溶着リブ１３が形成されている。   FIG. 9 shows a welding apparatus. A welding member 10 is fixed on a table, and a welding member 12 is fixed to a movable member that moves up and down. A welding groove 11 having a concave shape is formed on the welding surface of the welding member 10, and a welding rib 13 having a size capable of entering the welding groove 11 from above is formed on the welding member 12 side.

溶着に際してはテーブル上の被溶着部材１０の溶着溝１１内に抵抗発熱体１を組み付け、給電部３、３ａには図外の給電装置から延長されたコード１５、１５ａに結ばれた電極１４、１４ａが結ばれ、図１０（Ａ）から（Ｂ）に示すように抵抗発熱体１に対する給電と同時又は先行して可動部材を下降させて溶着溝１１内の抵抗発熱体１に溶着リブ１３の先端を押しつけることにより、抵抗発熱体１の熱でこの抵抗発熱体１に接している部分の樹脂が溶融ａを開始する。   At the time of welding, the resistance heating element 1 is assembled in the welding groove 11 of the member to be welded 10 on the table, and electrodes 14 connected to cords 15 and 15a extended from a power supply device (not shown) are connected to the power supply units 3 and 3a. 14A is connected, and as shown in FIGS. 10A to 10B, the movable member is lowered at the same time as or before the power supply to the resistance heating element 1, and the welding ribs 13 are formed on the resistance heating element 1 in the welding groove 11. By pressing the tip, the resin in the part in contact with the resistance heating element 1 starts to melt a with the heat of the resistance heating element 1.

この溶融ａの進行（Ｃ）に合わせて可動部材を更に下降させて、面圧をかけることにより溶融した樹脂は切り込み２内に侵入し（Ｃ）、所定の溶融ａが完了し（Ｄ）、給電が止る。   The movable member is further lowered in accordance with the progress (C) of the melting a, and the resin melted by applying a surface pressure enters the notch 2 (C), and the predetermined melting a is completed (D). Power supply stops.

この給電が止ると、抵抗発熱体１及び溶融ａが急激に冷却し、（Ｅ）に示すように最終的な溶着部ａ’が形成され、被溶着部材１０と１２は結合される。   When the power supply is stopped, the resistance heating element 1 and the melt a are rapidly cooled, and a final welded portion a 'is formed as shown in (E), and the welded members 10 and 12 are joined.

なお、以上に説明した給電タイミング及び被溶着部材１１の下降、停止のタイミングは制御回路により自動制御した。   In addition, the power feeding timing described above and the lowering and stopping timings of the welding member 11 were automatically controlled by a control circuit.

以上で熱溶着した製品（Ｎ＝５）について、次の条件で熱負荷テストを行った。その時のデータを次に示す。
１. 抵抗発熱体 切りこみ無し、本発明の切りこみあり
２．樹脂 ＰＰＳＧＦ３０％
３．負荷温度 −４０℃１時間
＋１２０℃ １時間
この温度サイクル１００回繰り返し毎に、ヘリウムガスを用いたリークテストを実施し１０００回まで繰り返し後もリークが発生しない事を確認した。
With respect to the product (N = 5) heat-welded as described above, a heat load test was performed under the following conditions. The data at that time is shown below.
1. Resistance heating element No cutting, with cutting according to the present invention. Resin PPSGF 30%
3. Load temperature −40 ° C. for 1 hour + 120 ° C. for 1 hour Each time this temperature cycle was repeated 100 times, a leak test using helium gas was performed, and it was confirmed that no leak occurred even after repeating 1000 times.

同様に、熱溶着した製品（Ｎ＝５）の引っ張り破壊応力を測定した。
１. 抵抗発熱体 切りこみ無し、本発明の切りこみあり
２．樹脂 ＰＰＳＧＦ３０％
３. 溶着リブ寸法 Ｗ＝１．８ Ｈ＝３．０（φ３４.２×φ３７．８の環状）
切りこみ無しの発熱体に対し、本発明の切りこみを形成した発熱体は溶着強度が平均２８％向上した。
Similarly, the tensile fracture stress of the thermally welded product (N = 5) was measured.
1. Resistance heating element No cutting, with cutting according to the present invention. Resin PPSGF 30%
3. Welding rib dimensions W = 1.8 H = 3.0 (annular of φ34.2 × φ37.8)
Compared to the heating element without cut, the heating element with the cut according to the present invention improved the welding strength by an average of 28%.

比較例Comparative example

本比較例に用いた抵抗発熱体１は、図１１に示すように、前記実施例と同一の条件で成形した。但し、抵抗発熱体１には、直径０．６ｍｍの孔４を９ｍｍ間隔で形成し、引用
文献１の第２図に示された抵抗発熱体に近似させ、Ｎ＝５の引っ張り破壊応力を測定した。
１. 抵抗発熱体 引用文献１を模した孔あき、本発明の切りこみあり
２．樹脂 ＰＰＳＧＦ３０％
３. 溶着リブ寸法 Ｗ＝１．８ Ｈ＝３．０（φ３４．２×φ３７．８の環状）
孔あり発熱体は溶着強度のバラツキが大きい。本発明の切りこみを形成した発熱体は溶着強度が平均４２％向上したことが確認できた。
As shown in FIG. 11, the resistance heating element 1 used in this comparative example was molded under the same conditions as in the previous example. However, the resistance heating element 1 is formed with holes 4 having a diameter of 0.6 mm at intervals of 9 mm and approximated to the resistance heating element shown in FIG. 2 of the cited reference 1, and the tensile fracture stress of N = 5 is measured. did.
1. Resistance heating element A perforation simulating the cited reference 1 and the incision of the present invention. Resin PPSGF 30%
3. Dimension of welding rib W = 1.8 H = 3.0 (annular of φ34.2 × φ37.8)
The heating element with holes has a large variation in welding strength. It was confirmed that the heating element formed with the cut according to the present invention improved the welding strength on average by 42%.

１ 抵抗発熱体
２ 切り込み
３、３ａ 給電部
１０ 被溶着部材Ａ
１１ 溶着溝
１２ 被溶着部材Ｂ
１３ 溶着リブ
１４、１４ａ 電極
１５、１５ａ リード線 DESCRIPTION OF SYMBOLS 1 Resistance heating element 2 Notch 3, 3a Feed part 10 To-be-welded member A
11 welding groove 12 member B to be welded
13 welding ribs 14 and 14a electrodes 15 and 15a lead wires

Claims (2)

熱可塑性樹脂で成形された成形品同士の四角形を呈した接合面に断面偏平四角形リング
状の抵抗発熱体を挟み込み、この抵抗発熱体に電圧を印加して発熱させることにより成形品同士の接合面の溶融を図り、更に接合面間に面圧をかけて接合面同士を熱溶着する方法に用いられる抵抗発熱体において、その各コーナー部分を円曲させると共にこの円曲させたコーナー部分であって、その左右のエッジ部分に交互に切り込みを形成したことを特徴とする熱溶着用抵抗発熱体。 Molded by sandwiching the thermoplastic sectional flat rectangular shape on the bonding surface exhibited square moldings between which it is molded with resin ring <br/> shaped resistance heating element, thereby generating heat by applying a voltage to the resistance heating element In the resistance heating element used in the method of melting the joint surfaces of the products and applying a surface pressure between the joint surfaces to thermally weld the joint surfaces, each corner portion is bent and bent. A heat-welding resistance heating element, characterized in that it is a corner portion, and incisions are alternately formed in the left and right edge portions. 前記切り込みは、平面視コ字状又はＶ字状又は円弧状又はＩ字状を呈していることを特徴とする請求項１に記載の熱溶着用抵抗発熱体。 2. The heat-welding resistance heating element according to claim 1 , wherein the cut has a U shape, a V shape, an arc shape, or an I shape in plan view .
JP2010252855A 2010-11-11 2010-11-11 Resistance heating element for hot welding Expired - Fee Related JP5342538B2 (en)

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