PL203692B1 - Sposób wytwarzania szczelnego względem wilgoci połączenia między końcami dwóch rur z tworzywa sztucznego - Google Patents

Sposób wytwarzania szczelnego względem wilgoci połączenia między końcami dwóch rur z tworzywa sztucznego

Info

Publication number
PL203692B1
PL203692B1 PL359126A PL35912603A PL203692B1 PL 203692 B1 PL203692 B1 PL 203692B1 PL 359126 A PL359126 A PL 359126A PL 35912603 A PL35912603 A PL 35912603A PL 203692 B1 PL203692 B1 PL 203692B1
Authority
PL
Poland
Prior art keywords
plastic
pipe
plastic pipes
pipes
heating element
Prior art date
Application number
PL359126A
Other languages
English (en)
Other versions
PL359126A1 (pl
Inventor
Jörn Homann
Wolf-Dieter Strumpen
Original Assignee
Brugg Rohr Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brugg Rohr Ag filed Critical Brugg Rohr Ag
Publication of PL359126A1 publication Critical patent/PL359126A1/pl
Publication of PL203692B1 publication Critical patent/PL203692B1/pl

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/20Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics
    • F16L47/22Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics using shrink-down material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining 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"
    • B29C65/3404Joining 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
    • B29C65/342Joining 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
    • B29C65/3428Joining 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining 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"
    • B29C65/3468Joining 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining 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"
    • B29C65/3472Joining 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
    • B29C65/3476Joining 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
    • B29C65/348Joining 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 with a polymer coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/66Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/72Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General 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
    • B29C66/51Joining 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
    • B29C66/53Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5324Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
    • B29C66/53241Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being tubular and said substantially annular single elements being of finite length relative to the infinite length of said tubular articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/72General 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
    • B29C66/723General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/72General 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
    • B29C66/727General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/73General 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
    • B29C66/737General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73715General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable heat-shrinkable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/91Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/91Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/91Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91653Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the voltage, i.e. the electric potential difference or electric tension
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/91Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02Welded joints; Adhesive joints
    • F16L47/03Welded joints with an electrical resistance incorporated in the joint
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/14Arrangements for the insulation of pipes or pipe systems
    • F16L59/16Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
    • F16L59/18Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints
    • F16L59/20Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints for non-disconnectable joints
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/10Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/40Heating elements having the shape of rods or tubes
    • H05B3/42Heating elements having the shape of rods or tubes non-flexible
    • H05B3/46Heating elements having the shape of rods or tubes non-flexible heating conductor mounted on insulating base
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/20Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242Particular 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
    • B29C66/2422Particular 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
    • B29C66/24221Particular 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/71General 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/72General 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
    • B29C66/723General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/73General 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
    • B29C66/739General 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
    • B29C66/7392General 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
    • B29C66/73921General 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/96Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00Tubular articles
    • B29L2023/22Tubes or pipes, i.e. rigid
    • B29L2023/225Insulated
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/003Heaters using a particular layout for the resistive material or resistive elements using serpentine layout

Landscapes

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

Description

Opis wynalazku
Przedmiotem wynalazku jest sposób wytwarzania szczelnego względem wilgoci połączenia między końcami dwóch rur z tworzywa sztucznego.
Z europejskiego opisu patentowego nr EP 1 087 171 A1 znany jest sposób wytwarzania złączki rurowej z tworzywa sztucznego, w którym na wewnętrznej powierzchni złączki mocuje się elektryczny oporowy element grzejny z wygiętego meandrowo drutu, następnie poszerza się złączkę rurową z oporowym elementem grzejnym, a następnie chłodzi się złączkę rurową w stanie poszerzonym. Element oporowy stanowi drut metalowy, osadzony w taśmie z tworzywa sztucznego. Znaną złączkę rurową stosuje się przy wytwarzaniu połączeń przewodów ciepłowniczych. Poszerzoną złączkę rurową nasuwa się przy tym na koniec jednej z rur, stanowiących łączone przewody ciepłownicze. Po połączeniu rur złączkę nasuwa się na miejsce połączenia, obkurcza poprzez doprowadzenie ciepła i zgrzewa z płaszczami przewodów ciepłowniczych poprzez przyłożenie napięcia do drutów metalowych.
Wadę tego rozwiązania stanowi fakt, że przy poszerzaniu złączki rurowej nie można zapewnić równomiernej zmiany odstępu pomiędzy zwojami meandrów. Przy niejednakowym odstępie zwojów doprowadzanie ciepła do miejsc o większym odstępie jest mniejsze. To z kolei może powodować, że w tych miejscach nastąpi niedostateczne zgrzanie złączki rurowej z płaszczami rur. Kolejna niedogodność polega na tym, że w niesprzyjających warunkach eksploatacji obszar elementów oporowych ulega zanieczyszczeniu, co również może być przyczyną wadliwych połączeń zgrzewanych.
Celem wynalazku jest takie udoskonalenie znanego sposobu, aby skutecznie utrzymywać stały odstęp poszczególnych zwojów meandrów, co zapewni doprowadzanie do każdego miejsca obwodu jednakowej ilości ciepła, oraz zapobiec przedostawaniu się zanieczyszczeń do obszaru spoiny.
Sposób wytwarzania szczelnego względem wilgoci połączenia między końcami dwóch rur z tworzywa sztucznego, korzystnie płaszczy przewodów ciepłowniczych, w którym poszerzoną złączkę rurową z tworzywa sztucznego nasuwa się na końce rur z tworzywa sztucznego, obkurcza i za pomocą elementów grzejnych zgrzewa z rurami z tworzywa sztucznego, według wynalazku charakteryzuje się tym, że na koniec jednej z rur z tworzywa sztucznego nasuwa się złączkę rurową, następnie element grzejny z osadzonego w pasku folii z tworzywa sztucznego, ukształtowanego meandrowo drutu metalowego nawija się w postaci co najmniej jednego zwoju na rury z tworzywa sztucznego, umieszcza się po jednym czujniku termicznym w obszarze elementu grzejnego, przesuwa się złączkę rurową na miejsce połączenia i obkurcza się złączkę rurową, co najmniej na jej końcach, na elementach grzejnych, oraz nagrzewa się druty metalowe za pomocą prądu elektrycznego i zgrzewa się końce złączki rurowej z końcami rur z tworzywa sztucznego.
Korzystnie po dopasowaniu do obwodu mocuje się folię z tworzywa sztucznego na powierzchni rury z tworzywa sztucznego.
Korzystnie na końcach złączki rurowej, przed lub bezpośrednio po rozpoczęciu zgrzewania, mocuje się elementy zaciskowe.
Korzystnie końcówki przyłączeniowe drutów metalowych utrzymuje się w odstępie względem siebie za pomocą elementów dystansowych, przy czym odstęp końcówek przyłączeniowych odpowiada odstępowi zwojów meandrów.
Korzystnie element dystansowy dla końcówek przyłączeniowych elementu grzejnego mocuje się na rurze z tworzywa sztucznego.
Poza zaletami, wynikającymi bezpośrednio z postawionego wyżej zadania, wynalazek jest o tyle korzystny, że element grzejny można dostarczać na miejsce budowy w odcinkach o dużych długościach, na przykład nawiniętych na bębny, z których pobiera się potrzebną długość.
Przedmiot wynalazku jest uwidoczniony w przykładach wykonania na rysunku, na którym fig. 1 przedstawia stosowany korzystnie w sposobie według wynalazku element grzejny 1 w widoku z boku, fig. 2 - koniec rury z tworzywa sztucznego, w widoku perspektywicznym, fig. 3 - łączone rury z tworzywa sztucznego z zamocowanymi na nich elementami grzejnymi i czujnikiem termicznym 8 na co najmniej jednym końcu, oraz fig. 4 - miejsce połączenia rur przed wypełnieniem przestrzeni pomiędzy rurą wewnętrzną i złączką rurową spienionym tworzywem piankowym.
Element grzejny 1 jest wykonany z wygiętego meandrowo drutu metalowego 2, korzystnie z miedzi, osadzonego w pasku foliowym 3 z tworzywa sztucznego. Pasek foliowy 3 jest z tego samego tworzywa sztucznego, co łączone rury 4 i złączka rurowa 5. Element grzejny 1 można wytwarzać w sposób ciągły w dużych długościach i nawijać go na bębny.
PL 203 692 B1
Konfekcjonowanie można przeprowadzać fabrycznie lub na miejscu budowy. W tym celu końcówki przyłączeniowe 6 drutu 5 metalowego 2 odgina się pod kątem prostym od elementu grzejnego 1.
Pomiędzy obydwoma końcami elementu grzejnego 1 na pasku foliowym 3 mocuje się za pomocą zgrzewania odcinek folii nośnej 7 z tego samego tworzywa sztucznego, co pasek foliowy 3. Na odcinku folii nośnej 7 umieszczony jest za pomocą elementów kotwiących 9 czujnik termiczny 8. Czujnik termiczny 8 jest usytuowany pomiędzy dwoma zwojami drutu metalowego 2.
Na fig. 2 przedstawiony jest w widoku koniec rury 4 z tworzywa sztucznego. Po nasunięciu złączki rurowej 5 na jedną z rur 4 z tworzywa sztucznego najpierw oczyszcza się powierzchnię rury 4, a następnie owija się wokół niej jeden zwój elementu grzejnego 1. Element grzejny 1 nagrzewa się do temperatury nieznacznie niższej od zakresu temperatur topnienia paska foliowego 3, doprowadzając ciepło z zewnątrz lub przykładając napięcie do drutu metalowego 2, i dopasowuje się go do obwodu rury 4 z tworzywa sztucznego.
Następnie pasek foliowy 3 mocuje się na rurze 4 poprzez miejscowe nagrzanie do temperatury wyższej niż zakres 5 temperatur topnienia tworzywa paska.
Za pomocą elementu dystansowego 10, odpornego na temperaturę i nieprzewodzącego prądu elektrycznego, który to elementu jest również zamocowany na rurze 4 z tworzywa sztucznego, końcówki przyłączeniowe 6 drutu metalowego 2 utrzymuje się w odstępie względem siebie, przy czym odstęp końcówek przyłączeniowych 6 względem siebie odpowiada odstępowi dwóch zwojów meandrycznie ukształtowanego drutu.
Na fig. 3 przedstawiony jest stan, w którym na obu łączonych rurach 4 z tworzywa sztucznego zamocowane są w opisany wyżej sposób elementy grzejne 1, zaś na co najmniej jednym końcu zamocowany jest czujnik termiczny 8.
Teraz na miejsce połączenia nasuwa się złączkę rurową 5, wykonaną z tego samego tworzywa sztucznego, co rury 4, w związku z czym oba elementy grzejne 1 są osłonięte złączką rurową 5, zaś końcówki przyłączeniowe 6 oraz końce czujnika termicznego 8 wystają z obu końców złączki rurowej 5. Rozumie się, że wewnętrzna powierzchnia złączki rurowej 5 została uprzednio oczyszczona, co najmniej na końcach. Poprzez doprowadzenie ciepła z zewnątrz obkurcza się końce poszerzonej złączki rurowej 5 i zaciska się elementy grzejne 1 pomiędzy rurami 4 z tworzywa sztucznego i złączką rurową 5. Ponieważ złączka rurowa 5 w stanie nieposzerzonym ma takie same wymiary, jak rura 4 z tworzywa sztucznego, złączka rurowa 5 jest dociśnięta obydwoma końcami do rury 4.
Następnie łączy się końcówki przyłączeniowe 6 ze źródłem napięcia i podłącza się czujnik termiczny 8 do aparatury pomiarowej. Źródło napięcia i aparatura pomiarowa nie są bliżej przedstawione. Tego typu aparatura jest przedmiotem opublikowanego niemieckiego zgłoszenia patentowego nr 37 02 912. Poprzez przyłożenie napięcia do końcówek przyłączeniowych 6 elementów grzejnych 1. topi się paski foliowe 3 oraz graniczne obszary rur 4 z tworzywa sztucznego i złączki rurowej 5, które mieszają się ze sobą. Doprowadzanie energii reguluje się przy tym za pomocą wartości mierzonych przez czujniki termiczne 8.
Po procesie zgrzewania przestrzeń 13 pomiędzy rurą wewnętrzną 11 i złączką rurową 5 można wypełnić pianką z tego 5 samego materiału, co warstwa izolacyjna 12, stosowana w przewodach ciepłowniczych pomiędzy rurą wewnętrzną i rurą 4 z tworzywa sztucznego, zazwyczaj z poliuretanu.
Na fig. 4 ukazane jest miejsce połączenia przed wypełnieniem pianką przestrzeni 13.
Miejsce połączenia wykonane sposobem według wynalazku jest zabezpieczone przed wnikaniem wilgoci i na tyle wytrzymałe, że może przejmować siły, powstające wskutek zmian temperatur i związanych z tym przesunięć rury ciepłowniczej.

Claims (5)

1. Sposób wytwarzania szczelnego względem wilgoci połączenia między końcami dwóch rur z tworzywa sztucznego, korzystnie płaszczy przewodów ciepłowniczych, w którym poszerzoną złączkę rurową z tworzywa sztucznego nasuwa się na końce rur z tworzywa sztucznego, obkurcza i za pomocą elementów grzejnych zgrzewa z rurami z tworzywa sztucznego, znamienny tym, że na koniec jednej z rur z tworzywa sztucznego nasuwa się złączkę rurową, następnie element grzejny z osadzonego w pasku folii z tworzywa sztucznego, ukształtowanego meandrowo drutu metalowego nawija się w postaci co najmniej jednego zwoju na rury z tworzywa sztucznego, umieszcza się po jednym czujniku termicznym w obszarze elementu grzejnego, przesuwa się złączkę rurową na miejsce połączenia
PL 203 692 B1 i obkurcza się złączkę rurową , co najmniej na jej koń cach, na elementach grzejnych, oraz nagrzewa się druty metalowe za pomocą prądu elektrycznego i zgrzewa się końce złączki rurowej z końcami rur z tworzywa sztucznego.
2. Sposób według zastrz. 2, znamienny tym, że po dopasowaniu do obwodu mocuje się folię z tworzywa sztucznego na powierzchni rury z tworzywa sztucznego.
3. Sposób według zastrz. 1 albo 2, znamienny tym, że na końcach złączki rurowej, przed lub bezpośrednio po rozpoczęciu zgrzewania, mocuje się elementy zaciskowe.
4. Sposób według zastrz. 1, znamienny tym, że końcówki przyłączeniowe drutów metalowych utrzymuje się w odstępie względem siebie za pomocą elementów dystansowych, przy czym odstęp końcówek przyłączeniowych odpowiada odstępowi zwojów meandrów.
5. Sposób według zastrz. 5, znamienny tym, że element dystansowy dla końcówek przyłączeniowych elementu grzejnego mocuje się na rurze z tworzywa sztucznego.
PL359126A 2002-03-16 2003-03-12 Sposób wytwarzania szczelnego względem wilgoci połączenia między końcami dwóch rur z tworzywa sztucznego PL203692B1 (pl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10211703A DE10211703B4 (de) 2002-03-16 2002-03-16 Verfahren zur Herstellung einer feuchtigkeitsdichten Verbindung

Publications (2)

Publication Number Publication Date
PL359126A1 PL359126A1 (pl) 2003-09-22
PL203692B1 true PL203692B1 (pl) 2009-11-30

Family

ID=27771380

Family Applications (1)

Application Number Title Priority Date Filing Date
PL359126A PL203692B1 (pl) 2002-03-16 2003-03-12 Sposób wytwarzania szczelnego względem wilgoci połączenia między końcami dwóch rur z tworzywa sztucznego

Country Status (4)

Country Link
DE (1) DE10211703B4 (pl)
DK (1) DK200300374A (pl)
IT (1) ITRM20030091A1 (pl)
PL (1) PL203692B1 (pl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007014049B3 (de) * 2007-03-21 2008-12-04 Friatec Ag Ausgleichselement zum Verbinden von Bauteilen
CH704994B1 (fr) * 2011-05-20 2016-03-15 Plco Pipelines Construction S A Procédé de raccordement de conduits de chauffage urbain et manchon de raccordement pour la mise en œuvre de ce procédé.
NL1040210C2 (nl) * 2013-05-14 2014-11-24 C C Rombouts Kunststof Techniek Holding B V Werkwijze voor het tegengaan van vochtmigratie in een thermisch geïsoleerde buis, alsmede volgens deze werkwijze vervaardigde buis.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3702912A1 (de) * 1986-06-05 1987-12-10 Kabelmetal Electro Gmbh Verfahren zur regelung des schweissvorganges bei der herstellung einer muffenverbindung fuer waermeisolierte leitungsrohre
CH671819A5 (pl) * 1986-07-31 1989-09-29 Meier Schenk Ag
DK162588C (da) * 1986-08-28 1992-04-06 Tarco As Fremgangsmaade til sammenfoejning af plastroerender med en plastsvejsemuffe
DE19652712C1 (de) * 1996-12-18 1998-02-05 Bem Gmbh Verbindung von Doppelrohren
DK1087171T3 (da) * 1999-08-27 2004-07-26 Star Pipe As Elektrisk svejsemuffe og fremgangsmåde til fremstilling af denne

Also Published As

Publication number Publication date
DE10211703A1 (de) 2003-09-25
DE10211703B4 (de) 2011-03-10
ITRM20030091A0 (it) 2003-02-28
ITRM20030091A1 (it) 2003-09-17
PL359126A1 (pl) 2003-09-22
DK200300374A (da) 2003-09-17

Similar Documents

Publication Publication Date Title
AU744364B2 (en) Apparatus for forming field joints on plastic coated pipe
KR102444335B1 (ko) 폴리에틸렌 파이프라인의 전기융합을 위한 장치 및 시스템
FI71406B (fi) Svetsmuff
EP0258827B1 (en) A method for connecting a plastic pipe end to a plastic welding sleeve
HU207822B (en) Welding device for making continuous induction bead on multi-layer packing material
US20130285366A1 (en) Non-crosslinked shrinkable casing member for forming a connection between tubular sections and method of forming said connection by induction fusion
JPH03213327A (ja) 加熱されると溶融するプラスチック製の配管部材を融接する方法およびそれに使用する連結スリーブ
CN103282709A (zh) 用于管道的焊接的方法和装置
DE69709713D1 (de) Verfahren und vorrichtung zum zusammenfügen, reparieren und wartung von mit einer isolierschicht versehenen rohren
PL203692B1 (pl) Sposób wytwarzania szczelnego względem wilgoci połączenia między końcami dwóch rur z tworzywa sztucznego
KR101635426B1 (ko) 이중보온관 연결용 케이싱을 이용한 이중보온관 연결방법
JPS62292419A (ja) 熱絶縁された導管のためのソケツト結合部を製造する際の熔接工程の制御方法と装置
SE468607B (sv) Muffoerband foer vaermeisolerade ledningsroer
WO1995025243A1 (en) Wraparound cover
RU2188913C1 (ru) Устройство для гидроизоляции стыковых соединений
KR200417002Y1 (ko) 지중매설관의 연결장치
NO874499L (no) Ekstrudert plastroer.
KR100562162B1 (ko) 합성수지관 연결용 시트 및 그를 이용한 관의 제조방법
KR200213729Y1 (ko) 수지관 융착 접합 수지판
JPH08306473A (ja) ヒータおよびその製造方法
JPH08306470A (ja) ヒータおよびその製造方法
JPH03149497A (ja) 配管用断熱材ブロックの間隙シール方法
JPS6331506Y2 (pl)
JPH06185688A (ja) 加熱用プレート
PL226291B1 (pl) Sposób i urządzenie do wytwarzania kształtek rurowych do łączenia odcinków rur z tworzyw sztucznych

Legal Events

Date Code Title Description
LAPS Decisions on the lapse of the protection rights

Effective date: 20130312