US20100175818A1 - Method for manufacturing pipe-lining material - Google Patents
Method for manufacturing pipe-lining material Download PDFInfo
- Publication number
- US20100175818A1 US20100175818A1 US12/657,145 US65714510A US2010175818A1 US 20100175818 A1 US20100175818 A1 US 20100175818A1 US 65714510 A US65714510 A US 65714510A US 2010175818 A1 US2010175818 A1 US 2010175818A1
- Authority
- US
- United States
- Prior art keywords
- tube
- absorbent material
- tubular resin
- resin absorbent
- pipe
- 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.)
- Abandoned
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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
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/26—Lining or sheathing of internal surfaces
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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
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5227—Joining tubular articles for forming multi-tubular articles by longitudinally joining elementary tubular articles wall-to-wall (e.g. joining the wall of a first tubular article to the wall of a second tubular article) or for forming multilayer tubular articles
- B29C66/52271—Joining tubular articles for forming multi-tubular articles by longitudinally joining elementary tubular articles wall-to-wall (e.g. joining the wall of a first tubular article to the wall of a second tubular article) or for forming multilayer tubular articles one tubular article being placed inside the other
- B29C66/52272—Joining tubular articles for forming multi-tubular articles by longitudinally joining elementary tubular articles wall-to-wall (e.g. joining the wall of a first tubular article to the wall of a second tubular article) or for forming multilayer tubular articles one tubular article being placed inside the other concentrically, e.g. for forming multilayer 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
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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
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
- B29C65/30—Electrical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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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
- B29C66/63—Internally supporting the article during joining
- B29C66/634—Internally supporting the article during joining using an inflatable core
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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
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
- B29C66/8266—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined
- B29C66/82661—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined by means of vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
- F16L55/1654—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section and being inflated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1656—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section materials for flexible liners
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
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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
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
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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
- B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
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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
- B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
- B29C66/72141—Fibres of continuous length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/721—Fibre-reinforced materials
- B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
- B29C66/72143—Fibres of discontinuous lengths
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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
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- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
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- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
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- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0809—Fabrics
- B29K2105/0845—Woven fabrics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0854—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns in the form of a non-woven mat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
- B29K2105/246—Uncured, e.g. green
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
- B29K2309/08—Glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0065—Permeability to gases
- B29K2995/0067—Permeability to gases non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/005—Hoses, i.e. flexible
- B29L2023/006—Flexible liners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
- B29L2031/601—Multi-tubular articles, i.e. composed of a plurality of tubes
- B29L2031/602—Multi-tubular articles, i.e. composed of a plurality of tubes composed of several elementary tubular elements
- B29L2031/603—Multi-tubular articles, i.e. composed of a plurality of tubes composed of several elementary tubular elements one placed inside the other, e.g. dual wall tubes
- B29L2031/605—Multi-tubular articles, i.e. composed of a plurality of tubes composed of several elementary tubular elements one placed inside the other, e.g. dual wall tubes concentrically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/04—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the partial melting of at least one layer
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
- H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
- H05B2203/005—Heaters using a particular layout for the resistive material or resistive elements using multiple resistive elements or resistive zones isolated from each other
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
Definitions
- the present invention relates to a method for manufacturing a pipe-lining material for lining a deteriorated existing pipe.
- Pipe channel lining methods are used for repairing an existing pipe without unearthing the existing pipe in the case that the underground existing pipe such as a clean water pipe, sewage pipe, or the like has deteriorated.
- the pipe-lining material composed of a tubular resin absorbent material in which a thermosetting resin has been impregnated is inserted into an existing pipe by eversion or drawing, and is expanded by air pressure or the like and held in a state that the pipe-lining material is pressed against the internal peripheral surface of the existing pipe.
- the pipe-lining material is heated, and the thermosetting resin impregnated in the tubular resin absorbent material is cured to line the existing pipe (e.g., Japanese Laid-open Patent Application Nos. 2006-130899 and 2007-125703 and the like).
- the resin absorbent material of the pipe-lining material is composed of a soft felt or the like, and a soft tube composed of a highly airtight plastic film is heat-fused to the external peripheral surface of the resin absorbent material (the internal peripheral surface when the pipe-lining material is everted) to form a coating layer.
- the tube protects the curable resin impregnated in the tubular resin absorbent material and prevents the curable resin from being in contact with the exterior.
- the heat-fused tube becomes the internal peripheral surface, thereby preventing the resin impregnated in the tubular resin absorbent material from being in direct contact with compressed air when the pipe-lining material is expanded using the compressed air in the subsequent lining process, or preventing the resin from being in direct contact with heat medium in the case that the resin is heated by the heat medium, such as steam, hot water, or the like.
- the tubular resin absorbent material is conventionally expanded inside the tube to be in close contact with the internal peripheral surface thereof.
- the tube is then conveyed into a columnar furnace provided with a heater that extends in the axial direction.
- the tube and the tubular resin absorbent material conveyed into the furnace are moved through the furnace toward the exit thereof, and heated from the exterior during movement, thereby the tube is heat-fused to the tubular resin absorbent material.
- a mechanism is required for moving the tube and the tubular resin absorbent material through the furnace, and the tube and the tubular resin absorbent material must be moved while the center axis of the furnace is aligned with the center axis of the tubular resin absorbent material and the tube that are both expanded in a columnar shape. Without such movement, the distance from the heater to the tube and the tubular resin absorbent material differs in the upper part and the lower part of the furnace, so that non-uniformities are generated in heating and thereby the tube cannot be uniformly heat-fused to the tubular resin absorbent material. When heat-fusion is insufficient, there is a problem that the resin impregnated in the tubular resin absorbent material is not adequately cured and thereby reliable lining becomes unavailable.
- the entire heater extending over the entire length of the furnace must be energized when the distal end of the tube and the tubular resin absorbent material are conveyed into the furnace.
- electricity must be continuously fed to the heater until the rear end thereof pass out of the exit of the furnace.
- a method for manufacturing a pipe-lining material comprising a tubular resin absorbent material covered with a tube comprised of an airtight plastic film, wherein the tube is heat-fused to an external peripheral surface of the tubular resin absorbent material.
- the method comprises inserting the tubular resin absorbent material into the tube, and expanding the tubular resin absorbent material and the tube in a columnar shape so as to bring the tubular resin absorbent material into close contact with the internal peripheral surface of the tube; winding a heater in close contact with the external peripheral surface of the tube thus expanded; and heating the tube and the tubular resin absorbent material by energizing the heater to heat-fuse the tube to the external peripheral surface of the tubular resin absorbent material.
- the heater is wound in close contact with the external peripheral surface of the tube that coves the tubular resin absorbent material.
- the tube and the tubular resin absorbent material are then heated by energizing the heater, so that the tube is heat-fused to the tubular resin absorbent material. Therefore, a mechanism for moving the tube and the tubular resin absorbent material is not required, and the tube can be uniformly heat-fused to the tubular resin absorbent material without generating heating non-uniformities, thereby manufacturing a high-quality pipe-lining material in a simple manner.
- the tube and the tubular resin absorbent material can be heated without waste, and the tube can be efficiently heat-fused to the tubular resin absorbent material using a small amount of power because the heater is wound in close contact with the external peripheral surface of the tube.
- FIG. 1 is a perspective view showing the pipe-lining material when the tubular resin absorbent material has been inserted into a tube and expanded;
- FIG. 2A is a perspective view showing the tubular resin absorbent material and the tube around which a heater has been wound
- FIG. 2B is a perspective view showing the tubular resin absorbent material and the tube around which a plurality of heaters has been wound
- FIG. 3 is an illustrative view showing the connections of the heating wires of the heater.
- FIG. 1 shows a process for manufacturing a pipe-lining material used to repair or rehabilitate an existing pipe.
- a pipe-lining material 1 comprises a soft tubular resin absorbent material 10 whose external peripheral surface 10 a is covered with a soft tube 11 composed of polyethylene, polypropylene, nylon, vinyl chloride, or another highly airtight plastic film.
- the tubular resin absorbent material 10 is composed of a matte, a woven, or a nonwoven using polyamide, polyester, polypropylene, or another plastic fiber; a matte or a woven using glass fiber; or a matte, a woven, or a nonwoven that combines the use of the above-noted plastic fiber and fiber glass.
- the tubular resin absorbent material 10 is impregnated with unsaturated polyester resin, vinyl ester resin, epoxy resin, or another uncured liquid thermosetting resin.
- the tubular resin absorbent material 10 is inserted into the tube 11 , and a tubular inner liner 12 that is closed at one end (the right side in FIG. 1 ) is inserted into the tubular resin absorbent material 10 so that the tubular resin absorbent material 10 can be held between the tube 11 and the inner liner 12 .
- a hole is opened in the tubular resin absorbent material 10 and the tube 11 , and a vacuum hose 13 is attached to the hole to suck the tubular resin absorbent material 10 by vacuum.
- Compressed air is fed from the open end (left side of FIG. 1 ) of the inner liner 12 .
- This causes the tube 11 , the tubular resin absorbent material 10 and the inner liner 12 , which are initially in a flat shape, to be all expanded in a columnar shape, as shown in FIG. 1 .
- the tubular resin absorbent material 10 is brought into close contact with the internal peripheral surface of the tube 11 .
- the inside diameter of the tube 11 substantially coincides with the outside diameter of the tubular resin absorbent material 10 when both are expanded in a columnar shape, and the inside diameter of the tubular resin absorbent material 10 substantially coincides with the outside diameter of the inner liner 12 when both are expanded in a columnar shape.
- the vacuum hose 13 is provided in only a single location, but the vacuum hose is ordinarily attached in a plurality of locations in accordance with the length of the pipe-lining material in order to efficiently carry out the vacuum suction of the tubular resin absorbent material.
- the tube 11 , the tubular resin absorbent material 10 and the inner liner 12 are kept in an expanded state, and a heater 20 is wound in close contact with the external peripheral surface of the tube 11 that covers the tubular resin absorbent material 10 .
- the heater 20 is such a heater in which Nichrome wires or other heating wires 20 b are arranged in a periodic serpentine fashion at an equal pitch p (e.g., 7.5 mm) inside a rectangular or square insulating cloth (shown as an imaginary line in the drawing) that has one side Y and another side Y′, as shown in FIG. 3 .
- Y′ is substantially equal to or greater than the outer circumference of the tube 11 , and has a length in which the both ends of the heater 20 are partially overlapping with each other ( FIG. 2A ) when the heater 20 is wound in close contact with the tube 11 .
- a heating wire 20 b is turned back when the heating wire 20 b has extended up to a predetermined distance in the Y′ direction, and is then turned back again when the heating wire 20 b has extended up to the same distance in the opposite direction thereof, as shown in FIG. 3 .
- This turning back is repeated so that the heating wire extends in a periodic serpentine fashion in the lengthwise direction of the pipe-lining material at a pitch p.
- the heating wire 20 b is connected to a plug 20 c at one end, and the heating wire 20 b can be energized and heat can be generated in the heating wire 20 b by plugging the plug 20 c into a power source outlet 20 d of the main line 21 .
- the quantity of heat generated by the heating wire is uniform over the entire heater 20 because the heating wire 20 b is uniformly distributed over substantially the entire heater.
- a plurality of heaters 20 is disposed adjacent to each other and wound in close contact with the external peripheral surface of the tube 11 , as shown in FIG. 2B .
- the smallest integer Z that satisfies the expression Y*Z>X (where * is the reference symbol for multiplication) is calculated for the case in which X is greater than Y, wherein X is the length of the pipe-lining material in the axial direction (the length of the tube 11 ), and Y is the length over which one side of the heater 20 extends in the length direction of the pipe-lining material.
- the calculated number Z of heaters 20 is arranged adjacent to each other and wound in close contact with the external peripheral surface of the tube 11 .
- the Z number of heaters 20 is connected in parallel by plugging the plug 20 c of each heater 20 into the power source outlet 20 d.
- the first heater 20 (left end in the drawing) is wound slightly to the right from the distal end of the tube 11 in order to facilitate an understanding of the present invention.
- the left end of the heater 20 and the distal end of the tube 11 are disposed in substantially matching positions.
- the length X in the pipe lengthwise direction is greater than the Y value of one side of the heater 20 . Therefore, Z number of heaters 20 is prepared using the formula described above, and the plugs 20 c are plugged into the outlets 20 d to connect the Z number of heaters 20 in parallel.
- the plugs of the heaters and the outlets are omitted in the drawing in order to avoid complexity.
- a predetermined number Z of heaters 20 is wound around the tube 11 , and the plugs 20 c are plugged into the power source outlets 20 d to energize the heaters 20 , respectively.
- the tube 11 and the tubular resin absorbent material 10 are uniformly heated, and the tube 11 is heat-fused to the tubular resin absorbent material 10 , thereby forming a coating layer thereon.
- the tubular resin absorbent material and the tube covering the tubular resin absorbent material can be entirely heated using a predetermined number of connected heaters even when the tubular resin absorbent material of the pipe-lining material is long. Therefore, heating can be uniformly and efficiently carried out, and the tube can be heat-fused to the tubular resin absorbent material with high quality.
- a thin metal sheet 30 (e.g., aluminum foil) having good thermal conductivity is wound around the tube 11 as shown by the imaginary line in FIG. 2B .
- the heaters 20 , 20 are then placed adjacent to each other and wound on the metal sheet, thereby rendering the quantity of heat to be uniform.
- the sheet 30 is shown in only one location in FIG. 2B , but the sheet is also wound around other adjacent heaters.
- a resin that cures by heating or by radiation of light, or a curable resin that cures at a normal temperature is impregnated in the tubular resin absorbent material 10 using a known method (described, e.g., in Japanese Laid-open Patent Application No. 2001-108555).
- the curable resin is injected into the tubular resin absorbent material 10 , and the tubular resin absorbent material 10 is then subjected to vacuum suction to produce negative pressure therein in order to impregnate the curable resin in the tubular resin absorbent material 10 . Accordingly, it is possible to manufacture a pipe-lining material in which a tube composed of an airtight plastic film is heat-fused to the external peripheral surface of the tubular resin absorbent material and a curable resin is impregnated therein.
- the pipe-lining material thus manufactured is inserted by eversion or by drawing into an existing pipe so that the tube becomes the internal peripheral surface.
- the pipe-lining material is then expanded by air pressure or the like so as to be pressed against the internal peripheral surface of the existing pipe.
- the pipe-lining material is heated or irradiated with light in order to cure the curable resin impregnated in the tubular resin absorbent material and line the existing pipe.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Manufacturing & Machinery (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
A method is proposed for manufacturing a pipe-lining material comprising a tubular resin absorbent material covered with a tube comprised of an airtight plastic film. The tubular resin absorbent material is inserted into the tube, expanded in a columnar shape, and brought into close contact with the internal peripheral surface of the tube. A heater is wound in close contact with the external peripheral surface of the tube thus expanded. The tube and the tubular resin absorbent material are heated by energizing the heater, and the tube is thereby heat-fused to the tubular resin absorbent material. With such a method, a mechanism for moving the tube and the tubular resin absorbent material is not required. In addition, since heat non-uniformities are not generated, the tube can be uniformly heat-fused to the tubular resin absorbent material, thereby enabling a high-quality pipe-lining material to be manufactured.
Description
- 1. Field of the Invention
- The present invention relates to a method for manufacturing a pipe-lining material for lining a deteriorated existing pipe.
- 2. Description of the Related Art
- Pipe channel lining methods are used for repairing an existing pipe without unearthing the existing pipe in the case that the underground existing pipe such as a clean water pipe, sewage pipe, or the like has deteriorated. With this method, the pipe-lining material composed of a tubular resin absorbent material in which a thermosetting resin has been impregnated is inserted into an existing pipe by eversion or drawing, and is expanded by air pressure or the like and held in a state that the pipe-lining material is pressed against the internal peripheral surface of the existing pipe. In this state, the pipe-lining material is heated, and the thermosetting resin impregnated in the tubular resin absorbent material is cured to line the existing pipe (e.g., Japanese Laid-open Patent Application Nos. 2006-130899 and 2007-125703 and the like).
- The resin absorbent material of the pipe-lining material is composed of a soft felt or the like, and a soft tube composed of a highly airtight plastic film is heat-fused to the external peripheral surface of the resin absorbent material (the internal peripheral surface when the pipe-lining material is everted) to form a coating layer. The tube protects the curable resin impregnated in the tubular resin absorbent material and prevents the curable resin from being in contact with the exterior. In the case that the pipe-lining material is everted and inserted into a pipeline, the heat-fused tube becomes the internal peripheral surface, thereby preventing the resin impregnated in the tubular resin absorbent material from being in direct contact with compressed air when the pipe-lining material is expanded using the compressed air in the subsequent lining process, or preventing the resin from being in direct contact with heat medium in the case that the resin is heated by the heat medium, such as steam, hot water, or the like.
- In the case that the tube is heat-fused to the external peripheral surface of the resin absorbent material of the pipe-lining material, the tubular resin absorbent material is conventionally expanded inside the tube to be in close contact with the internal peripheral surface thereof. The tube is then conveyed into a columnar furnace provided with a heater that extends in the axial direction. The tube and the tubular resin absorbent material conveyed into the furnace are moved through the furnace toward the exit thereof, and heated from the exterior during movement, thereby the tube is heat-fused to the tubular resin absorbent material.
- With such a method, a mechanism is required for moving the tube and the tubular resin absorbent material through the furnace, and the tube and the tubular resin absorbent material must be moved while the center axis of the furnace is aligned with the center axis of the tubular resin absorbent material and the tube that are both expanded in a columnar shape. Without such movement, the distance from the heater to the tube and the tubular resin absorbent material differs in the upper part and the lower part of the furnace, so that non-uniformities are generated in heating and thereby the tube cannot be uniformly heat-fused to the tubular resin absorbent material. When heat-fusion is insufficient, there is a problem that the resin impregnated in the tubular resin absorbent material is not adequately cured and thereby reliable lining becomes unavailable.
- On the other hand, the entire heater extending over the entire length of the furnace must be energized when the distal end of the tube and the tubular resin absorbent material are conveyed into the furnace. In addition, electricity must be continuously fed to the heater until the rear end thereof pass out of the exit of the furnace. These cause another problem that wasteful heating and power consumption is inevitable.
- It is an object of the present invention to provide a method for manufacturing a pipe-lining material in which a tube is uniformly and efficiently heat-fused to the tubular resin absorbent material, and a high-quality pipe-lining material can be manufactured using a simple method.
- According to the present invention, a method is proposed for manufacturing a pipe-lining material comprising a tubular resin absorbent material covered with a tube comprised of an airtight plastic film, wherein the tube is heat-fused to an external peripheral surface of the tubular resin absorbent material. The method comprises inserting the tubular resin absorbent material into the tube, and expanding the tubular resin absorbent material and the tube in a columnar shape so as to bring the tubular resin absorbent material into close contact with the internal peripheral surface of the tube; winding a heater in close contact with the external peripheral surface of the tube thus expanded; and heating the tube and the tubular resin absorbent material by energizing the heater to heat-fuse the tube to the external peripheral surface of the tubular resin absorbent material.
- In the present invention, the heater is wound in close contact with the external peripheral surface of the tube that coves the tubular resin absorbent material. The tube and the tubular resin absorbent material are then heated by energizing the heater, so that the tube is heat-fused to the tubular resin absorbent material. Therefore, a mechanism for moving the tube and the tubular resin absorbent material is not required, and the tube can be uniformly heat-fused to the tubular resin absorbent material without generating heating non-uniformities, thereby manufacturing a high-quality pipe-lining material in a simple manner.
- In the present invention, the tube and the tubular resin absorbent material can be heated without waste, and the tube can be efficiently heat-fused to the tubular resin absorbent material using a small amount of power because the heater is wound in close contact with the external peripheral surface of the tube.
-
FIG. 1 is a perspective view showing the pipe-lining material when the tubular resin absorbent material has been inserted into a tube and expanded; -
FIG. 2A is a perspective view showing the tubular resin absorbent material and the tube around which a heater has been wound, andFIG. 2B is a perspective view showing the tubular resin absorbent material and the tube around which a plurality of heaters has been wound; and -
FIG. 3 is an illustrative view showing the connections of the heating wires of the heater. - Now, referring to the drawings, description is made about embodiments of the present invention. The description is herein made as regards a method for manufacturing a pipe-lining material used to line a sewage pipe as an existing pipe. However, the present invention is not limited to this case, but can be applied to other cases in which the method for manufacturing a pipe-lining material is used to line a clean water pipe, an agricultural water pipe, or the like.
-
FIG. 1 shows a process for manufacturing a pipe-lining material used to repair or rehabilitate an existing pipe. A pipe-lining material 1 comprises a soft tubular resinabsorbent material 10 whose externalperipheral surface 10 a is covered with asoft tube 11 composed of polyethylene, polypropylene, nylon, vinyl chloride, or another highly airtight plastic film. - The tubular resin
absorbent material 10 is composed of a matte, a woven, or a nonwoven using polyamide, polyester, polypropylene, or another plastic fiber; a matte or a woven using glass fiber; or a matte, a woven, or a nonwoven that combines the use of the above-noted plastic fiber and fiber glass. The tubular resinabsorbent material 10 is impregnated with unsaturated polyester resin, vinyl ester resin, epoxy resin, or another uncured liquid thermosetting resin. - In order to manufacture such a pipe-lining material, the tubular resin
absorbent material 10 is inserted into thetube 11, and a tubularinner liner 12 that is closed at one end (the right side inFIG. 1 ) is inserted into the tubular resinabsorbent material 10 so that the tubular resinabsorbent material 10 can be held between thetube 11 and theinner liner 12. - A hole is opened in the tubular resin
absorbent material 10 and thetube 11, and avacuum hose 13 is attached to the hole to suck the tubular resinabsorbent material 10 by vacuum. Compressed air is fed from the open end (left side ofFIG. 1 ) of theinner liner 12. This causes thetube 11, the tubular resinabsorbent material 10 and theinner liner 12, which are initially in a flat shape, to be all expanded in a columnar shape, as shown inFIG. 1 . The tubular resinabsorbent material 10 is brought into close contact with the internal peripheral surface of thetube 11. The inside diameter of thetube 11 substantially coincides with the outside diameter of the tubular resinabsorbent material 10 when both are expanded in a columnar shape, and the inside diameter of the tubular resinabsorbent material 10 substantially coincides with the outside diameter of theinner liner 12 when both are expanded in a columnar shape. - In
FIG. 1 , thevacuum hose 13 is provided in only a single location, but the vacuum hose is ordinarily attached in a plurality of locations in accordance with the length of the pipe-lining material in order to efficiently carry out the vacuum suction of the tubular resin absorbent material. - As shown in
FIG. 2A , thetube 11, the tubular resinabsorbent material 10 and theinner liner 12 are kept in an expanded state, and aheater 20 is wound in close contact with the external peripheral surface of thetube 11 that covers the tubular resinabsorbent material 10. - The
heater 20 is such a heater in which Nichrome wires orother heating wires 20 b are arranged in a periodic serpentine fashion at an equal pitch p (e.g., 7.5 mm) inside a rectangular or square insulating cloth (shown as an imaginary line in the drawing) that has one side Y and another side Y′, as shown inFIG. 3 . Y′ is substantially equal to or greater than the outer circumference of thetube 11, and has a length in which the both ends of theheater 20 are partially overlapping with each other (FIG. 2A ) when theheater 20 is wound in close contact with thetube 11. - A
heating wire 20 b is turned back when theheating wire 20 b has extended up to a predetermined distance in the Y′ direction, and is then turned back again when theheating wire 20 b has extended up to the same distance in the opposite direction thereof, as shown inFIG. 3 . This turning back is repeated so that the heating wire extends in a periodic serpentine fashion in the lengthwise direction of the pipe-lining material at a pitch p. Theheating wire 20 b is connected to aplug 20 c at one end, and theheating wire 20 b can be energized and heat can be generated in theheating wire 20 b by plugging theplug 20 c into apower source outlet 20 d of themain line 21. The quantity of heat generated by the heating wire is uniform over theentire heater 20 because theheating wire 20 b is uniformly distributed over substantially the entire heater. - When the pipe-
lining material 1 has considerable length, a plurality ofheaters 20 is disposed adjacent to each other and wound in close contact with the external peripheral surface of thetube 11, as shown inFIG. 2B . In this case, the smallest integer Z that satisfies the expression Y*Z>X (where * is the reference symbol for multiplication) is calculated for the case in which X is greater than Y, wherein X is the length of the pipe-lining material in the axial direction (the length of the tube 11), and Y is the length over which one side of theheater 20 extends in the length direction of the pipe-lining material. The calculated number Z ofheaters 20 is arranged adjacent to each other and wound in close contact with the external peripheral surface of thetube 11. The Z number ofheaters 20 is connected in parallel by plugging theplug 20 c of eachheater 20 into thepower source outlet 20 d. - In
FIGS. 2A and 2B , the first heater 20 (left end in the drawing) is wound slightly to the right from the distal end of thetube 11 in order to facilitate an understanding of the present invention. However, in actual practice, the left end of theheater 20 and the distal end of thetube 11 are disposed in substantially matching positions. - In the case of the pipe-lining
material 1 shown inFIG. 2 , the length X in the pipe lengthwise direction is greater than the Y value of one side of theheater 20. Therefore, Z number ofheaters 20 is prepared using the formula described above, and theplugs 20 c are plugged into theoutlets 20 d to connect the Z number ofheaters 20 in parallel. In the example ofFIG. 2B , threeheaters 20 are wound around thetube 11 and connected in parallel. However, the plugs of the heaters and the outlets are omitted in the drawing in order to avoid complexity. - A predetermined number Z of
heaters 20 is wound around thetube 11, and theplugs 20 c are plugged into thepower source outlets 20 d to energize theheaters 20, respectively. Thetube 11 and the tubular resinabsorbent material 10 are uniformly heated, and thetube 11 is heat-fused to the tubular resinabsorbent material 10, thereby forming a coating layer thereon. - Thus, the tubular resin absorbent material and the tube covering the tubular resin absorbent material can be entirely heated using a predetermined number of connected heaters even when the tubular resin absorbent material of the pipe-lining material is long. Therefore, heating can be uniformly and efficiently carried out, and the tube can be heat-fused to the tubular resin absorbent material with high quality.
- The portions in which the
heaters 20 are adjacent to each other are less likely to be uniformly heated. Therefore, a thin metal sheet 30 (e.g., aluminum foil) having good thermal conductivity is wound around thetube 11 as shown by the imaginary line inFIG. 2B . Theheaters sheet 30 is shown in only one location inFIG. 2B , but the sheet is also wound around other adjacent heaters. - Thus, when the
tube 11 has been heat-fused to the external peripheral surface of the tubular resinabsorbent material 10, vacuum suction via thevacuum hose 13 is stopped, and the supply of compressed air to theinner liner 12 is discontinued. This allows thetube 11, the tubular resinabsorbent material 10 and theinner liner 12 to contract. Theinner liner 12 is then pulled out from thetube 11 and the tubular resinabsorbent material 10. - A resin that cures by heating or by radiation of light, or a curable resin that cures at a normal temperature is impregnated in the tubular resin
absorbent material 10 using a known method (described, e.g., in Japanese Laid-open Patent Application No. 2001-108555). In other words, the curable resin is injected into the tubular resinabsorbent material 10, and the tubular resinabsorbent material 10 is then subjected to vacuum suction to produce negative pressure therein in order to impregnate the curable resin in the tubular resinabsorbent material 10. Accordingly, it is possible to manufacture a pipe-lining material in which a tube composed of an airtight plastic film is heat-fused to the external peripheral surface of the tubular resin absorbent material and a curable resin is impregnated therein. - The pipe-lining material thus manufactured is inserted by eversion or by drawing into an existing pipe so that the tube becomes the internal peripheral surface. The pipe-lining material is then expanded by air pressure or the like so as to be pressed against the internal peripheral surface of the existing pipe. In this state, the pipe-lining material is heated or irradiated with light in order to cure the curable resin impregnated in the tubular resin absorbent material and line the existing pipe.
Claims (4)
1. A method for manufacturing a pipe-lining material comprising a tubular resin absorbent material covered with a tube comprised of an airtight plastic film, wherein the tube is heat-fused to an external peripheral surface of the tubular resin absorbent material, the method comprising:
inserting the tubular resin absorbent material into the tube, and expanding the tubular resin absorbent material and the tube in a columnar shape so as to bring the tubular resin absorbent material into close contact with the internal peripheral surface of the tube;
winding a heater in close contact with the external peripheral surface of the tube thus expanded; and
heating the tube and the tubular resin absorbent material by energizing the heater to heat-fuse the tube to the external peripheral surface of the tubular resin absorbent material.
2. The method for manufacturing a pipe-lining material according to claim 1 , wherein the heater includes heating wires that are arranged in a periodic serpentine fashion at an equal pitch inside a rectangular or square insulating cloth having a side substantially equal to an outer circumference of the tube.
3. The method for manufacturing a pipe-lining material according to claim 2 , wherein the smallest integer Z that satisfies the expression Y*Z>X is calculated for the case in which X is greater than Y, wherein X is the length of the pipe-lining material, and Y is the length over which one side of the heater extends in the length direction of the pipe-lining material;
the calculated number Z of heaters is arranged adjacent to each other and wound around the external peripheral surface of the tube; and
the Z number of heaters is connected in parallel and energized.
4. The method for manufacturing a pipe-lining material according to claim 3 , wherein a thermoconductive sheet is wound around a tube, and the heater is wound via the thermoconductive sheet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-006213 | 2009-01-15 | ||
JP2009006213A JP2010162749A (en) | 2009-01-15 | 2009-01-15 | Method for manufacturing pipe-lining material |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100175818A1 true US20100175818A1 (en) | 2010-07-15 |
Family
ID=42318200
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/657,145 Abandoned US20100175818A1 (en) | 2009-01-15 | 2010-01-14 | Method for manufacturing pipe-lining material |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100175818A1 (en) |
JP (1) | JP2010162749A (en) |
KR (1) | KR20100084117A (en) |
CN (1) | CN101780716A (en) |
TW (1) | TW201036802A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016201484A1 (en) * | 2015-06-19 | 2016-12-22 | Christopher Meredith | Improvements in apparatus for repairing pipe joints |
FR3119070A1 (en) * | 2021-01-19 | 2022-07-22 | Enedis | HEATING DEVICE SUITABLE FOR SOFTENING A PORTION OF AN INSULATING OUTER SHEATH OF AN ELECTRICAL CABLE |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102022588A (en) * | 2010-08-27 | 2011-04-20 | 广东联塑科技实业有限公司 | Plastic-lined steel plastic composite tube and manufacturing method thereof |
CN104220237B (en) | 2012-04-12 | 2017-03-01 | 芦森工业株式会社 | The lining method of pipeline and the inner lining material of pipeline |
TWI547663B (en) * | 2012-04-13 | 2016-09-01 | Ashimori Ind Co Ltd | Pipe lining method and piping lining material |
CN110014676B (en) * | 2019-04-15 | 2021-03-19 | 上海乐通管道工程有限公司 | High-efficiency in-situ thermoplastic forming construction process |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3393297A (en) * | 1966-01-14 | 1968-07-16 | Oliver M. Hart | Combined heating and insulating means for heat-treating objects |
US4425497A (en) * | 1979-08-17 | 1984-01-10 | Raychem Corporation | PTC Heater assembly |
US5242517A (en) * | 1990-06-29 | 1993-09-07 | Get Inc. | Pipe liner and a method for manufacturing same |
US20100024185A1 (en) * | 2007-02-21 | 2010-02-04 | United Technologies Corporation | Complete wire mesh repair with heat blanket |
-
2009
- 2009-01-15 JP JP2009006213A patent/JP2010162749A/en active Pending
- 2009-12-23 KR KR1020090129769A patent/KR20100084117A/en not_active Application Discontinuation
-
2010
- 2010-01-08 TW TW099100382A patent/TW201036802A/en unknown
- 2010-01-14 US US12/657,145 patent/US20100175818A1/en not_active Abandoned
- 2010-01-15 CN CN201010004418A patent/CN101780716A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3393297A (en) * | 1966-01-14 | 1968-07-16 | Oliver M. Hart | Combined heating and insulating means for heat-treating objects |
US4425497A (en) * | 1979-08-17 | 1984-01-10 | Raychem Corporation | PTC Heater assembly |
US5242517A (en) * | 1990-06-29 | 1993-09-07 | Get Inc. | Pipe liner and a method for manufacturing same |
US20100024185A1 (en) * | 2007-02-21 | 2010-02-04 | United Technologies Corporation | Complete wire mesh repair with heat blanket |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016201484A1 (en) * | 2015-06-19 | 2016-12-22 | Christopher Meredith | Improvements in apparatus for repairing pipe joints |
AU2016278346B2 (en) * | 2015-06-19 | 2020-07-09 | Christopher Meredith | Improvements in apparatus for repairing pipe joints |
FR3119070A1 (en) * | 2021-01-19 | 2022-07-22 | Enedis | HEATING DEVICE SUITABLE FOR SOFTENING A PORTION OF AN INSULATING OUTER SHEATH OF AN ELECTRICAL CABLE |
Also Published As
Publication number | Publication date |
---|---|
TW201036802A (en) | 2010-10-16 |
KR20100084117A (en) | 2010-07-23 |
CN101780716A (en) | 2010-07-21 |
JP2010162749A (en) | 2010-07-29 |
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