JP5342538B2 - Resistance heating element for hot welding - Google Patents
Resistance heating element for hot welding Download PDFInfo
- 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
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- resistance heating
- welding
- heat
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 90
- 238000003466 welding Methods 0.000 title claims abstract description 56
- 229920005989 resin Polymers 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 229920001169 thermoplastic Polymers 0.000 claims 1
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- 230000008602 contraction Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 229920005992 thermoplastic resin Polymers 0.000 description 6
- 238000005304 joining Methods 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 4
- 101100008046 Caenorhabditis elegans cut-2 gene Proteins 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 208000031872 Body Remains Diseases 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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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
- 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
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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
- 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
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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
- 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
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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
- B29C66/20—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
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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
- B29C66/20—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
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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
- B29C66/303—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
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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
- B29C66/50—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
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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
- B29C66/73—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
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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
- 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
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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
- B29C66/20—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
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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
- B29C66/20—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
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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
- B29C66/20—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
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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
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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
- B29C66/72—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
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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
- B29C66/80—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
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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
- B29C66/80—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
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.
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.
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。
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。
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%.
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。
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)
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.
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JP2010252855A JP5342538B2 (en) | 2010-11-11 | 2010-11-11 | Resistance heating element for hot welding |
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JPS55128428A (en) * | 1979-03-27 | 1980-10-04 | Kinugawa Rubber Ind Co Ltd | Connecting method for thermoplastic resin product |
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