WO2008004329A1 - Appareil de formation d'extrusion destiné à un tuyau multicouche en résine - Google Patents

Appareil de formation d'extrusion destiné à un tuyau multicouche en résine Download PDF

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Publication number
WO2008004329A1
WO2008004329A1 PCT/JP2007/000275 JP2007000275W WO2008004329A1 WO 2008004329 A1 WO2008004329 A1 WO 2008004329A1 JP 2007000275 W JP2007000275 W JP 2007000275W WO 2008004329 A1 WO2008004329 A1 WO 2008004329A1
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WO
WIPO (PCT)
Prior art keywords
die
heater
resin
pipe
passage
Prior art date
Application number
PCT/JP2007/000275
Other languages
English (en)
Japanese (ja)
Inventor
Yoshiharu Kikusawa
Original Assignee
Pla Giken Co., Ltd.
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 Pla Giken Co., Ltd. filed Critical Pla Giken Co., Ltd.
Publication of WO2008004329A1 publication Critical patent/WO2008004329A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B29C48/337—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location
    • B29C48/338—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location using a die with concentric parts, e.g. rings, cylinders
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
    • B29C48/3366—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die using a die with concentric parts, e.g. rings, cylinders
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/865—Heating
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • 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
    • B29L2023/22—Tubes or pipes, i.e. rigid

Definitions

  • the present invention relates to an extrusion of a resin multilayer tube in which a multilayer tube is formed, an outer tube is moldable, and each portion of a die in which an outer passage is formed is heated separately.
  • the present invention relates to a molding apparatus.
  • the extrusion molding apparatus is extruded from the first and second extruders that extrude the first and second resins different from each other by thermally melting them separately, and the first extruder.
  • An inner passage that allows the inner tube to be molded by passing the first resin is formed, and an outer tube that is externally fitted to the inner tube by passing the second resin extruded from the second extruder.
  • the outer passage is formed so that a multilayer tube can be formed by the inner and outer tubes, and a heater for heating the die is provided.
  • the first and second resins heated and melted by the first and second extruders are first upstream of the inner and outer passages in the die. Extruded continuously toward the edge. Next, the first and second resins are passed through the inner and outer passages toward the downstream end thereof, thereby forming the inner and outer tubes. Further, the inner and outer pipes are integrally fitted to each other by the die and continuously pushed out from the die, thereby forming a target multilayer pipe.
  • the heater heats the die to heat and melt the first and second resins passing through the inner and outer passages, and gives them proper fluidity. It is supposed to be.
  • Patent Document 1 Japanese Patent No. 3 5 1 4 7 3 9
  • the inner and outer tubes have a thickness dimension in particular. It is thought that it is molded with high accuracy, that is, a high-precision multilayer tube is molded.
  • each "appropriate melting temperature” for making them into an appropriate molten state is usually the first of these. 1. Different for each second resin. However, the heater in the above prior art simply heats the die as a whole. For this reason, it is difficult to bring the first and second resins to the “appropriate melting temperatures” with the conventional techniques described above.
  • the types of the first and second resins are set so that the “appropriate melting temperatures” of the first and second resins are close to each other. Adjustments have been made.
  • the second point is that the temperature of the first and second resins passing through the inner and outer passages is almost equal to the “appropriate melting temperature” of the first and second resins. Heating is performed by the heater so as to achieve an average value or to match the value of “appropriate melting temperature” on the higher side of the average value.
  • the degree of freedom in selecting the types of the first and second resins that are the materials of the inner and outer tubes tends to decrease.
  • the temperatures of the first and second resins cannot be brought close to the “appropriate melting temperature” with high accuracy.
  • the flow of one of the second resins tends to slow down due to high viscosity ⁇ high viscosity, and the flow of other resins tends to become turbulent due to low viscosity due to high temperature. Yes, this tends to reduce the dimensional accuracy of the inner and outer tubes.
  • the present invention has been made paying attention to the circumstances as described above, and the object of the present invention is to thermally melt different first and second resins to form inner and outer tubes, and When forming a multilayer pipe with inner and outer pipes, the inner pipe and outer pipe must be made of a desired material and desired accuracy.
  • the present invention passes through first and second extruders that extrude the first and second resins, which are different from each other, by thermally melting them separately, and the first resin extruded from the first extruder.
  • An inner passage is formed to allow the inner tube to be molded, and the outer tube 5 that is externally fitted to the inner tube is allowed to pass through the second resin extruded from the second extruder.
  • an extrusion molding apparatus for a resin multilayer pipe comprising a die capable of forming the multilayer pipe 2 by the inner pipe and the outer pipe, and a heater for heating the die,
  • the heater includes a first heater for heating a part of the die in which at least a part of the inner passage is formed, and another part of the die in which at least a part of the outer passage is formed separately from the first heater. And a second heater for heating.
  • a heat insulating portion for preventing mutual heat transfer may be interposed between a part of the die and the other part.
  • a mating surface between a part of the die and another part is formed on a surface orthogonal to the axial center of the die, and the heat insulating portion is interposed between the mating surfaces. May be.
  • the present invention passes through the first and second extruders for extruding the first and second resins, which are different from each other, by thermally melting them separately, and the first resin extruded from the first extruder.
  • An inner passage is formed that allows the inner tube to be molded, and an outer tube that is externally fitted to the inner tube through the second resin extruded from the second extruder can be molded.
  • An outer passage is formed, and a multilayer pipe is formed by the inner and outer pipes above.
  • the heater includes a first heater for heating a part of the die in which at least a part of the inner passage is formed, and another part of the die in which at least a part of the outer passage is formed separately from the first heater. And a second heater for heating.
  • the heater heats and melts the first and second resins passing through the inner and outer passages by heating the die. Gives fluidity.
  • a part of the die in which the inner passage is formed is heated by the first heater, and the temperature of the first resin passing through the inner passage is heated to the “appropriate melting temperature”.
  • the other part of the die in which the outer passage is formed is heated by the second heater separately from the first heater, and the temperature of the second resin 9 passing through the outer passage becomes the “appropriate melting”. It is heated to “temperature”.
  • first and second resins are made of different materials, even if they are different from each other, the first and second resins are heated separately from each other.
  • the “adequate melting temperature” can be achieved more reliably, and a more laminar flow can be achieved in the inner and outer passages.
  • the inner and outer tubes are formed with higher accuracy, that is, the multilayer tube is formed with higher accuracy.
  • a heat insulating portion for preventing mutual heat transfer may be interposed between a part of the die and the other part.
  • the first resin in the inner passage formed in a part of the die and the second resin in the outer passage formed in the other part of the die The positive melting temperature ”.
  • the first and second resins can flow more reliably in a laminar flow, and the effect of claim 1 is promoted.
  • a mating surface between a part of the die and another part is formed on a surface orthogonal to the axial center of the die, and the heat insulating portion is interposed between the mating surfaces. May be.
  • FIG. 1 is a side sectional view of an extrusion molding apparatus.
  • FIG. 2 is a partially enlarged view of FIG.
  • FIG. 3 is a partial cutaway view taken along line 1 1 1 _ 1 1 1 in FIG.
  • the present invention relates to an apparatus for extruding a resin multilayer pipe, wherein the first and second resins different from each other are thermally melted to form an outer pipe, and the inner and outer pipes form the multilayer pipe.
  • the best mode for carrying out the present invention is as follows. .
  • the apparatus for extruding a resin multilayer tube includes first and second extruders for extruding first and second resins different from each other by thermally melting them separately, and the first extruder.
  • An inner passage is formed in which the first resin extruded from the second extruder can be formed, and the second resin extruded from the second extruder is passed through to the outer pipe.
  • An outer passage is formed that allows the outer tube to be fitted to be formed, and includes a die that can form a multilayer tube by the inner and outer tubes, and a heater that heats the die.
  • the heater includes a first heater for heating a part of the die in which at least a part of the inner passage is formed, and another part of the die in which at least a part of the outer passage is formed. And a second heater for heating separately.
  • reference numeral 1 denotes an extrusion molding apparatus
  • the extrusion molding apparatus 1 indicates a resin multilayer pipe 2 and a metal core material 3 built in the multilayer pipe 2 by arrows F r. Extrusion is performed continuously toward the front.
  • the multilayer pipe 2 is circular
  • An inner tube 4 and a circular outer tube 5 that is integrally fitted to the inner tube 4 are provided.
  • the extrusion molding apparatus 1 is a thermoplastic first resin, first and second extruders 1 and 2 that are different from each other and are melted by heat and extruded separately separately. 0, 11, and the first and second extruders 10, 11, the first and second resins 8, 9 extruded from each other, and the multilayer pipe 2 in which the core material 3 is internally fitted Continuously extrusion die 1 2, heater 1 3 for heating this die 1 2, unillustrated take-up machine for picking up multilayer tube 2 and core material 3 extruded from die 1 2, and die 1 is provided with a cooling device (not shown) for cooling the multilayer pipe 2 and the core material 3 between the two and the take-up machine to solidify the multilayer pipe 2.
  • the first resin 8 has a plurality of (three) different first resins 8a, 8b, and 8c.
  • the first extruder 10 also has a plurality (three) of first extruders 10 a, 10 b, and 10 c. Each of the first extruders 10 a, 10 b, and 10 c allows the first resins 8 a, 8 b, and 8 c to be separately melted and extruded.
  • the die 12 includes the first to fifth die members 16_20 arranged in a row from the rear side to the front side, and the first center on the axis 22 extending in the front-rear direction. —Fastening that detachably fixes the mandrel 2 3 inserted into the die hole formed in the fourth die member 1 6 _ 1 9 and the first to fifth die members 1 6 — 2 0 and the mandrel 2 3 to each other. 2 and 4 are provided.
  • the second die member 17 includes first to third cylindrical bodies 2 6 _ 28 that are taper-fitted in a plurality of layers on the shaft 22.
  • the first to third cylindrical bodies 26_28 are sequentially arranged from the inner side to the outer side of the second die member 17.
  • the first pipe 8 extruded from the first extruder 10 passes through the multilayer pipe.
  • an inner passage 31 that enables the inner tube 4 to be formed is formed in the die 12.
  • first to third passages 3 2 to 3 4 that are independent of each other are formed between the first and third cylindrical bodies 2 6 _ 28. These first to third passages 3 2 to 3 4 form the rear part of the inner passage 31.
  • the first to third passages 3 2 _ 3 4 were respectively extruded from the first extruders 1 O a, 1 0 b, 1 0 c to the rear end portions (upstream end portions) of the first to third passages 3 2 _ 3 4, respectively.
  • Each first resin 8a, 8b, 8c can be introduced.
  • a cylindrical inner passage body 35 is formed between the mandrel 23 and the third die member 18 in the direction orthogonal to the axis 22.
  • the inner passage body 3 5 forms a front portion of the inner passage 31.
  • the front ends of the first to third passages 3 2 _ 34 are communicated with the rear end of the inner passage body 35 so as to gather together.
  • an outer passage 37 that allows the outer tube 5 of the multilayer tube 2 to be molded is formed in the die 12.
  • a cylindrical joining passage 38 is formed between the mandrel 23 and the fifth die member 20 in the direction perpendicular to the axis 22.
  • the front end of the inner passage body 35 of the inner passage 31 and the front end of the outer passage 37 are communicated with the rear end of the merge passage 38 so as to gather together.
  • the front end of the merge passage 38 is opened forward from the front surface of the fifth die member 20.
  • a through hole 40 is formed in the mandrel 23 on the shaft 22, and the core member 3 can be passed through the through hole 40 toward the front.
  • the heater 13 heats a portion 1 2a of the die 1 2 in which the first to third passages 3 2 _ 3 4 which are at least a part of the inner passage 31 are formed.
  • a part 1 2 a of the die 12 corresponds to the second die member 17 and a rear part of the mandrel 23 fitted in the second die member 17.
  • the first heater 42 is inserted into the external heater 45 that heats the second die member 17 from the outer surface side thereof, and the through hole 40, and the axial direction of the die 12
  • An internal heater 46 is provided to heat the mandrel 23 located at substantially the same position as the second die member 17 from the inner surface side.
  • the other part 12 b of the die 12 corresponds to the third to fifth die members 18-20.
  • the second heater 43 heats the third_fifth die member 18_20 from the outer surface side.
  • the internal heater 46 heats a portion of the mandrel 23 in which the inner passage main body 35 is formed.
  • the second die member 1 7 which is a part 1 2a of the die 1 2 and the third die member 1 8 which is another part 1 2b are opposed to each other. It is formed on a plane perpendicular to the axial center 2 of. Between the mating surfaces 47, a heat insulating part 48 is provided to prevent heat transfer between the part 12 a and the other part 12 b of the die 12.
  • the heat insulating portion 48 will be described in detail.
  • An annular groove 49 centered on the shaft 22 is formed on the mating surface 47 (front surface) of the second die member 17.
  • a plurality (three) of annular cooling grooves 50 centered on the axis 22 are provided on the mating surface 47 (rear surface) of the third die member 18 corresponding to the annular groove 49. Is formed. These cooling grooves 50 are formed by bending one groove.
  • a lid plate 52 that is fixed to the mating surface 47 (rear surface) of the third die member 18 by a fastener 51 and uses the cooling groove 50 as a sealed passage is provided. Communication passages 53 and 54 are formed to open each end of the cooling groove 50 to the outside of the third die member 18.
  • the lid plate 52 is formed of a metal plate, but may be formed of a heat insulating material such as ceramic.
  • An air pump 56 that supplies cooling air 55 to one end of the cooling groove 50 is provided through one of the communication passages 53, 54.
  • the air 55 supplied to one end of the cooling groove 50 flows through the cooling groove 50. After moving, it reaches the other end and is discharged to the outside of the third die member 18 through the other communication path 54.
  • the heat exchange between the second and third die members 17 and 18 and the air 55 heat-insulates the part 1 2 a of the die 12 and the other part 1 2.
  • the first and second extruders 10, 11 and the take-up machine are driven, and the die 12 is heated by the heater 13.
  • the first resins 8a, 8b, 8c pushed out by the driving of the first extruders 10a, 10b, 10c are the first to third of the inner passage 31.
  • the passage 3 2 _ 3 4 and the inner passage main body 3 5 are sequentially passed, whereby the multi-layered (three layers) inner tube 4 is formed.
  • the second resin 9 extruded by driving the second extruder 11 is passed through the outer passage 37, whereby the outer tube 5 is formed.
  • the inner tube 4 and the outer tube 5 are passed through the merge passage 38, whereby the multilayer tube 2 is formed.
  • a tensile stress is generated in the multilayer pipe 2 by the pulling force of the take-up machine, and the pipe is contracted in the radial direction and is externally fitted so as to be in close contact with the core material 3.
  • the multilayer pipe 2 and the core material 3 are cooled and solidified to form the multilayer pipe 2 as the final product.
  • the heater 13 heats the die 12 so that the first and second resins 8 and 9 passing through the inner and outer passages 31 and 37 are removed. Heat and melt to give fluidity to these 8,9.
  • the first and second resins 8 and 9 are made to flow in a more laminar flow, and in order to bring them into an appropriate molten state.
  • Each “appropriate melting temperature” is greatly different for each of the first and second resins 8 and 9 described above.
  • the “appropriate melting temperatures” of the first resins 8 a, 8 b and 8 c are substantially the same.
  • the first resin 8 is an acrylic resin, and the “appropriate melting temperature” is 230 ° C. ⁇ 10 ° C.
  • the second resin 9 is a vinyl chloride resin, and its “appropriate melting temperature” is 160 ° C. ⁇ 5 ° C. And these The difference between the two “adequate melting temperatures” is 50 ° C or more, which is a big difference. For this reason, the portion 12 a of the die 12 in which the inner passage 31 is formed is heated to be higher than the other portion 12 b of the die 12 in which the outer passage 37 is formed. Thus, the first and second resins 8 and 9 are controlled so that they are more appropriately melted. Such temperature control is achieved by a temperature sensor (not shown) or a control device (not shown) that electronically controls the heater 13 based on detection signals from these sensors.
  • the materials of the first resin 8 and the second resin 9 may be reversed, and in this case, a part of the die 12 in which the inner passage 31 is formed 1 2 Also, the other part 1 2 b of the die 12 in which the outer passage 37 is formed is heated so as to have a high temperature.
  • a portion 12a of the die 12 in which the inner passage 31 is formed is heated by the first heater 42, and the temperature of the first resin 8 passing through the inner passage 31 is increased. It is heated to the “appropriate melting temperature”.
  • the other part 1 2 b of the die 12 in which the outer passage 37 is formed is heated by the second heater 43 separately from the first heater 4 2, and passes through the outer passage 37.
  • the second resin 9 is heated so that its temperature becomes the “appropriate melting temperature”.
  • the first and second resins 8 and 9 desired materials even if these 8 and 9 are different from each other, the first and second resins 8, 9 9 is more reliably brought to the “appropriate melting temperature” by the above-described separate heating, and a more laminar flow is possible in the inner and outer passages 31 and 37.
  • the inner and outer tubes 4 and 5 are formed with higher accuracy, that is, the multilayer tube 2 is formed with higher accuracy.
  • the heat insulating part 48 that prevents heat transfer between the parts 1 2a and 1 2b is provided.
  • the heat exchange between the part 1 2a of the die 12 and the other part 1 2b is prevented by the heat insulating part 48. Therefore, the part 1 2a of the die 12 And other parts 1 2 b can be controlled with high accuracy while preventing mutual thermal effects.
  • the first resin 8 in the inner passage 31 formed in the part 1 2 a of the die 12 and the second resin in the outer passage 37 formed in the other part 1 2 b of the die 1 2. 9 and 9 can be brought to the “appropriate melting temperature”. As a result, the first and second resins 8 and 9 can flow in a laminar flow more reliably.
  • the mating surface 47 of the portion 12a of the die 12 and the other portion 12b is formed on a surface orthogonal to the axis 22 of the die 12
  • the heat insulating portion 48 is interposed between the mating surfaces 47.
  • the inner passage 31 may be single, and the outer passage 37 has a plurality of passages like the illustrated inner passage 31. Also good. Also, if the value of the “appropriate melting temperature” of each of the first resins 8a, 8b, and 8c is significantly different from each other, such as 50 ° C or higher, the first to third passages 3 2-3 Another heat insulating portion 48 may be provided between any of the four.
  • the present invention may be achieved by appropriately combining the individual constituent members described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Selon la présente invention, lors de la formation de tuyaux interne et externe d'un tuyau multicouche par fusion thermique d'une première et d'une seconde résine de types différents, on peut obtenir des tuyaux interne et externe d'un tuyau multicouche possédant tous deux une qualité de matériau et une précision souhaitées. L'appareil de formation d'extrusion (1) comprend : une première et une seconde extrudeuse (10, 11) destinées à extruder de manière distincte une première et une seconde résine (8, 9) de différents types ; une filière (12) pourvue non seulement d'un canal interne (31) qui permet l'écoulement de la première résine (8) pour former le tuyau interne (4), mais également d'un canal externe (37) qui permet l'écoulement de la seconde résine (9) pour former le tuyau externe (5) ajusté par l'extérieur au tuyau interne (4), ce qui permet de former un tuyau multicouche (2) à l'aide de tuyaux interne et externe (4, 5) ; et un dispositif de chauffage (13) destiné à chauffer la filière (12). Le dispositif de chauffage (13) est équipé d'un premier élément chauffant (42) destiné à chauffer une partie (12a) de la filière (12) comprenant une partie au moins du canal interne (31) et d'un second élément chauffant (43) destiné à chauffer l'autre partie (12b) de la filière (12) comprenant une partie au moins du canal externe (37) et ce, indépendamment du premier élément chauffant (42).
PCT/JP2007/000275 2006-07-06 2007-03-20 Appareil de formation d'extrusion destiné à un tuyau multicouche en résine WO2008004329A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006187051A JP2008012821A (ja) 2006-07-06 2006-07-06 樹脂製多層管の押出成形装置
JP2006-187051 2006-07-06

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WO2008004329A1 true WO2008004329A1 (fr) 2008-01-10

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WO (1) WO2008004329A1 (fr)

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WO2023156168A1 (fr) 2022-02-21 2023-08-24 KraussMaffei Extrusion GmbH Filière d'extrusion et système d'extrusion

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JP2012057724A (ja) * 2010-09-09 2012-03-22 Furukawa Electric Co Ltd:The ガス輸送用可撓管
JP6223949B2 (ja) * 2014-10-24 2017-11-01 株式会社プラ技研 帯電防止チューブ、およびその押出成形装置
CN105058766B (zh) * 2015-07-28 2017-04-19 武汉新中德塑机股份有限公司 一种组合式三层共挤内冷模头
JPWO2018123090A1 (ja) * 2016-12-27 2018-12-27 株式会社プラ技研 発泡樹脂チューブの製造装置及び製造方法、発泡樹脂チューブ

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JPS4977962A (fr) * 1972-11-29 1974-07-26
JPS53129251A (en) * 1977-04-19 1978-11-11 Toshiba Machine Co Ltd Multilayer die for sheet forming
JPS565750A (en) * 1979-06-27 1981-01-21 Toyo Seikan Kaisha Ltd Multilayer extrusion of plastic and multilayer extruding die
JPS5761524A (en) * 1980-10-01 1982-04-14 Du Pont Mitsui Polychem Co Ltd Manufacture of laminate and co-extrusion die used of it
JP2001517158A (ja) * 1995-07-25 2001-10-02 エイヴォン プロパティー マネージメント カンパニー 多層燃料チューブの押し出し成形装置および方法
JP2002331569A (ja) * 2001-05-11 2002-11-19 Pura Giken:Kk 押出成形装置の多層サーキュラダイ
JP2002331570A (ja) * 2001-05-11 2002-11-19 Pura Giken:Kk 押出成形装置における樹脂加熱装置

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WO2023156168A1 (fr) 2022-02-21 2023-08-24 KraussMaffei Extrusion GmbH Filière d'extrusion et système d'extrusion
DE102022104009A1 (de) 2022-02-21 2023-08-24 KraussMaffei Extrusion GmbH Extrusionswerkzeug und Extrusionsanlage

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