WO2024088499A1 - Cooling system for linear product and method for manufacturing linear product - Google Patents

Cooling system for linear product and method for manufacturing linear product Download PDF

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Publication number
WO2024088499A1
WO2024088499A1 PCT/EP2022/079554 EP2022079554W WO2024088499A1 WO 2024088499 A1 WO2024088499 A1 WO 2024088499A1 EP 2022079554 W EP2022079554 W EP 2022079554W WO 2024088499 A1 WO2024088499 A1 WO 2024088499A1
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WO
WIPO (PCT)
Prior art keywords
liquefied gas
cooling
cylindrical portion
hollow cylindrical
unit
Prior art date
Application number
PCT/EP2022/079554
Other languages
French (fr)
Inventor
Fumie HOKAO
Tadasu Nakatani
Original Assignee
L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude
Air Liquide Japan G.K.
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Filing date
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Application filed by L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude, Air Liquide Japan G.K. filed Critical L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude
Priority to PCT/EP2022/079554 priority Critical patent/WO2024088499A1/en
Publication of WO2024088499A1 publication Critical patent/WO2024088499A1/en

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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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C48/255—Flow control means, e.g. valves
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92209—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C48/06—Rod-shaped
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B29C48/2883—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of preformed parts, e.g. inserts fed and transported generally uninfluenced through the extruder or inserts fed directly to the die
    • 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
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated

Definitions

  • Patent Document 1 discloses a method for manufacturing a metal wire for reinforcing a high-pressure hose.
  • a structure is provided in which a plurality of reinforcing layers 2 and intermediate layers 3 are coated on the outer side of an inner surface layer 1 of a tubular, and an outer surface layer 4 is further coated.
  • the reinforcement layer 2 is wrapped around the steel wire in a knitted or spiral manner. It is necessary to cool the inner layer before forming the reinforcing layer 2.
  • Patent Literature 2 discloses that a coated electric wire is immersed in a water bath and cooled. As described above, in the prior art, it is common practice to immerse in a cold water bath or to cool by blowing cold air by a blower or a chiller.
  • Patent Document 1 JP H 10-166027 JP
  • Patent Document 2 JP 2007-80730 JP [0004]
  • the cooling is not constant, and unevenness can occur. In particular, it is not effective when it is desired to shorten the cooling time.
  • the present disclosure provides a cooling system that has a smaller installation space with a simpler apparatus than in the prior art, and can shorten a cooling time while suppressing cooling unevenness.
  • the present disclosure also provides a method of manufacturing a linear product using the cooling system.
  • the cooling system (1) of the linear product includes: supply unit (2) that supplies a liquefied gas, and a cooling unit (3) that indirectly applies the cold energy of the liquefied gas supplied from the supply unit (2). Indirectly applying means that the liquefied gas is not cooled by direct contact, but cooled by providing a small non-contact space.
  • the supply unit (2) may include: a first liquefied gas pipe (L1) that is connected to an inlet (34) of the cooling unit (3); a control valve (V1) that is provided in the first liquefied gas pipe (L1); and a first controller (21) that adjusts the opening degree of the control valve (V1) and controls the flow rate of the liquefied gas on the basis of the measured temperature (Tpv) measured by a temperature measuring device (33) provided in the cooling unit (3) and a preset set value (Tsv).
  • the supply unit (2) may include: a second liquefied gas pipe (L2) that bypasses the upstream side and the downstream side of the control valve (V1); and a gate valve (V2) that is provided in the second liquefied gas pipe (L2).
  • the first control unit (21) may control the gate valve (V2) at the time of initial introduction of the liquefied gas or on the basis of the measured temperature (Tpv) measured by the temperature measuring device (33) provided in the cooling unit (3) and a preset initial setting value (Tsv0).
  • the supply unit (2) may include: a second controller that controls the gate valve (V2) at the time of initial introduction of the liquefied gas or on the basis of the measured temperature (Tpv) measured by the temperature measuring device (33) provided in the cooling unit (3) and a preset initial setting value (Tsv0).
  • the gate valve (V2) and the control valve (V1) may be configured such that the other is not operated (completely closed state) when one is operated (valve opening or closing state, opening degree control state).
  • the first control unit (21) may also have a function as the second control unit.
  • the cooling unit (3) may include: a cylindrical body (30) having a double-passage-structure that is provided in which liquefied gas is supplied to a space of the double-passage-structure (interior space of double-passage- structure), and cools cooling target while the cooling target is moved in an inner hollow of the cylindrical body (30).
  • the cylindrical body (30) having the double-passage-structure may include: a first hollow cylindrical portion (31) that is arranged at a predetermined clearance (d1) around the cooling target in the moving state; a second hollow cylindrical portion (32) that is arranged with a predetermined clearance (d2) around the first cylindrical portion (31); a temperature measuring device (33) that measures the temperature between the first hollow cylindrical portion (31) and the second cylindrical portion (32) or the temperature inside the second cylindrical portion (32); an inlet (34) that is connected between the first hollow cylindrical portion (31) and the second hollow cylindrical portion (32) and introduces the liquefied gas (e.g. liquid nitrogen) supplied from the first liquefied gas pipe (L1); and one or more through holes (31a) that are provided in the first hollow cylindrical portion (31).
  • a liquefied gas e.g. liquid nitrogen
  • the temperature measurement unit (13) may be disposed on, for example, a longitudinal downstream side, an intermediate portion, or an upstream side, or one or more of the temperature measurement units may be provided.
  • the first and second control units (21) may control a valve to be controlled (the control valve (V1) and the gate valve (V2)) based on one or more measured temperature data.
  • the cylindrical body (30) may include: a (non-rotating) stirring unit (37) that is stationary disposed inside the double-passage-structure or between the first hollow cylindrical portion (31) and the second hollow cylindrical portion (31) to stir the flow of the liquefied gas.
  • the stirring unit (37) may be configured a spiral rod-shaped material or a plate-shaped material between the first hollow cylindrical portion (31) and the second hollow cylindrical portion (32).
  • the stirring unit (37) may be configured one or more rod-shaped material or plate-shaped material that are fixedly or detachably connected to the outer surface of the first hollow cylindrical portion (31) and/or the inner surface of the second hollow cylindrical portion (32).
  • the linear product is, for example, a linear product of a thermosetting resin, and examples thereof include a resin hose with a reinforcing layer, an electric wire cable coated with a resin, and a metal pipe coating material.
  • the object to be cooled may be an intermediate of a linear product.
  • the linear product is an elongated product of at least 10m or more, and may have a circular cross section, a rectangular shaped cross section, or a polygonal shaped cross section.
  • the liquefied gas includes, for example, liquefied gas of an inert gas such as liquid nitrogen, liquid argon, and liquid helium, and liquid air.
  • a method of manufacturing a linear product that is the method of manufacturing a linear product having a plurality of layers, include: a resin layer forming step (S1) for forming a resin layer (y1) by extrusion molding of a thermoplastic resin to form a first intermediate (P1); and a cooling step (S2) for cooling the first intermediate (P1) including the resin layer (y1) formed in the resin layer forming step (S1) by the cooling system (1) while transporting the first intermediate (P1).
  • the method may further include: a reinforcing layer forming step (S3) for forming a reinforcing layer (y2) on an outer surface of the resin layer (y1) of the cooled first intermediate (P1) after the cooling step (S3) to form a second intermediate (P2).
  • One or more layers or electric wires may be provided on the inner peripheral surface of the resin layer (y1).
  • the resin layer forming step (S1) may form the resin layer (y1) on the outside (outer surface) of one or more layers or the outside (outer surface) of an electric wire by extrusion molding of a thermoplastic resin to form a first intermediate (P1).
  • One or more layers may be formed on the outer surface of the reinforcing layer (y2).
  • the method may further include a resin layer forming step (S4) for forming a resin layer (y3) on the outside (outer surface) of the reinforcing layer (y2) formed in the reinforcing layer forming step (S3) by extrusion molding of a thermoplastic resin to form a third intermediate (P3).
  • the method may include a cooling step (S5) for cooling the third intermediate (P3) by the cooling system (1) while conveying the third intermediate (P3) having the resin layer (y3) formed in the resin layer forming step (S4).
  • the above cooling system (1) and the method have the following effects. (1) Cooling time can be shortened and cooling can be efficiently performed with a simple cooling system with a small installation space.
  • FIG. 1A is a diagram illustrating an example of a cooling system according to a first embodiment.
  • FIG. 1B is a diagram illustrating an example of a cooling unit according to a first embodiment;
  • FIG. 2 is a diagram illustrating an example of a linear product.
  • FIG. 3 is a diagram illustrating an example of an apparatus for manufacturing a linear product.
  • FIG. 4 is a process flow illustrating an example of a process of manufacturing a linear product.
  • DETAILED DESCRIPTION [0015]
  • the present invention is not limited to the following embodiments in any way, and includes various modifications that are implemented within a scope that does not change the principle of the present invention. Note that not all of the configurations described below are essential elements of the present invention. Upstream and downstream are set based on the flow direction of the liquefied gas. Upstream and downstream are set also based on the conveyance direction of the linear product. [0016] (Embodiment 1)
  • the cooler 1 of the first embodiment will be described with reference to FIGS. 1A and 1B.
  • the cooling system 1 includes a supply unit 2 for supplying the liquefied gas, and a cooling unit 3 for indirectly applying the cold energy of the liquefied gas supplied from the supply unit 2.
  • the liquefied gases are liquid-nitrogen LN 2 .
  • the supply unit 2 includes a first liquefied gas pipe L1, a second liquefied gas pipe L2, a control valve V1, a gate valve V2, and a first controller 21.
  • the first liquefied gas pipe L1 is connected to the inlet 34 of the cooling unit 3.
  • the control valve V1 is provided in the first liquefied gas pipe L1.
  • the second liquefied gas pipe L2 bypasses the upstream side and the downstream side of the control valve V1.
  • the gate valve V2 is provided in the second liquefied gas pipe L2.
  • the first controller 21 adjusts the opening degree of the control valve V1 based on the measured temperature (Tpv) measured by the temperature measuring device 33(e.g., thermometer) provided in the cooling unit 3 and a preset set value (Tsv), and controls the flow rate of the liquid nitrogen LN 2 .
  • the first controller 21 controls the gate valve V2 based on the measured temperature (Tpv) measured by the temperature measuring device 33 and a preset initial setting value Tsv0 when the liquid-nitrogen is initially introduced.
  • the supply unit 2 may include a cylinder and a tank in which the liquefied gas is stored.
  • the supply unit 2 may include a safety valve for discharging the atmosphere in the first liquefied gas pipe L1.
  • the supply unit 2 may include a manual valve for finely adjusting the liquid feeding amount of the first liquefied gas pipe L1 and the second liquefied gas pipe L2.
  • the cooling unit 3 has a cylindrical body 30 having a double passage structure in which liquefied gas is supplied to a space of the double-passage-structure, and cools cooling target while the cooling target is moved in an inner hollow of the cylindrical body 30.
  • the cylindrical body 30 includes a first hollow cylindrical portion 31, a second hollow cylindrical portion 32, a temperature measuring device 33, an inlet 34, and a stirring unit 37.
  • the first hollow cylindrical portion 31 is disposed at a predetermined clearance (d1) around the linear product in the moving state or an intermediate(P1) thereof.
  • the second hollow cylindrical portion 32 is disposed at a predetermined clearance (d2) around the first hollow cylindrical portion 31. Liquid nitrogen flows in the clearance (d2).
  • the lengths of the first hollow cylindrical portion 31 and the lengths of the second hollow cylindrical portion 32 in the longitudinal direction are set in accordance with the specifications of the linear product and the cooling capacity, and are exemplified by, for example, 1m to 5m.
  • the cross-sectional shape of the inner wall surface of the first hollow cylindrical portion 31 is set in accordance with the cross-sectional shape of the linear product or the intermediate (P1). In the first embodiment, the cross section of the linear product and the intermediate (P1) is circular. In accordance with this, the first hollow cylindrical portion 31 and the second hollow cylindrical portion 32 are also cylindrical in cross section.
  • the size relationship among the outer diameter ⁇ 0 of the intermediate(P1), the inner diameter ⁇ 11 of the first hollow cylindrical portion 31, the outer diameter ⁇ 12 of the first hollow cylindrical portion 31, the inner diameter ⁇ 21 of the second hollow cylindrical portion 32 and the outer diameter ⁇ 22 of the second hollow cylindrical portion 32 is as follows. ⁇ 0 ⁇ 11 ⁇ 12 ⁇ 21 ⁇ 22 ⁇ (1)
  • the clearance d1 and the clearance d2 are as follows. d1 is, for example, 0.5mm to 5mm. d2 is, for example, 5mm to 10mm. [0019]
  • the temperature measuring device 33 measures the temperature between the first hollow cylindrical portion 31 and the second hollow cylindrical portion 32 or the temperature inside the second hollow cylindrical portion 32.
  • the temperature measuring device 33 is provided on the downstream side or the intermediate portion of the length in the longitudinal direction of the first and second hollow cylindrical portions 31, 32.
  • the inlet 34 is connected between the first cylindrical portion 31 and the second hollow cylindrical portion 32, and introduces liquid nitrogen supplied from the first liquefied gas pipe L1.
  • the first hollow cylindrical portion 31 is provided with one or more through holes 31a.
  • the liquid-nitrogen LN 2 flowing between the first hollow cylindrical portion 31 and the second hollow cylindrical portion 32 become the nitrogen-gas N 2 by applying the cold energy of LN 2 to the linear product or the intermediate thereof .
  • the nitrogen-gas N 2 passes through the through-hole 31a and then is conveyed together with the linear product or the intermediate thereof to be released into the atmosphere.
  • both ends in the longitudinal direction of the second hollow cylindrical portion 32 are a ring-shaped first wall 351 in upstream side and a ring-shaped second wall 352 in downstream side that block the space S formed between the first hollow cylindrical portion 31 and the second hollow cylindrical portion 32.
  • Liquid nitrogen is introduced into the space S through the inlet 34 provided in the first wall 351 or the second hollow cylindrical portion 32. Nitrogen gas or liquid nitrogen may be led out through the through-hole 31 a or the outlet provided in the second wall 352 or the second hollow cylindrical portion 32.
  • the stirring portion 37 is stationary disposed between the first cylindrical portion 31 and the second hollow cylindrical portion 32.
  • the stirring unit 37 is formed by a spiral rod-shaped material.
  • FIG. 2 shows an example of a linear product.
  • the linear product represents a resin hose P with reinforcement wires.
  • the resin hose P has a three-layer structure including a resin inner layer y1, a reinforcing layer y2, and a resin outer layer y3.
  • FIG. 3 illustrates an example of a linear product manufacturing apparatus.
  • the first resin extrusion molding machine 5 molds the resin inner layer y1 to produce the intermediate P1.
  • a steel wire is wound around the outer surface of the resin inner layer y2 to form a reinforcing layer y2, and an intermediate P2 is formed.
  • the cooling system 1 is disposed between the first resin extruder 5 and the steel wire winding machine 6, and rapidly cools and stabilizes the resin inner layer y1.
  • FIG. 4 shows an example of a process of the manufacturing method.
  • the thermoplastic resin is extrusion molded to form the resin inner layer y1, thereby producing the first intermediate P1.
  • the first intermediate P1 including the resin inner layer y1 formed in the resin layer forming step (S1) is cooled by the cooling system 1 while being conveyed.
  • the first controller 21 fully closes the control valve V1, fully opens the gate valve V2, and supplies the liquefied gas to the cooling unit 3 through the second liquefied gas pipe L2.
  • the measured temperature (Tpv) becomes the initial setting value (Tsv0)
  • the first controller 21 closes the gate valve V2.
  • the first controller 21 adjusts the opening degree of the control valve V1 based on the measured temperature (Tpv) measured by the temperature measuring device 33 and a preset set value (Tsv), and controls the flow rate of the liquid nitrogen LN2.
  • the initial setting value (Tsv0) and the preset set value (Tsv) may be the same value or different values.
  • the initial setting value (Tsv0) and the preset set value (Tsv) may be set by the resin-inner layer y1 and the reinforcing layer y2.
  • the reinforcing layer forming step (S3) after the cooling step (S3), the reinforcing layer y2 is formed on the outer surface of the resin inner layer y1 of the first intermediate P1, thereby producing the second intermediate P2.
  • the resin outer layer forming step (S4) the resin layer y3 is formed on the outer surface of the reinforcing layer y2 by extrusion molding of the thermoplastic resin, thereby producing the third intermediate P3.
  • the resin outer layer 3 formed in the resin layer forming step (S4) is cooled by a cooling system while being conveyed.
  • the cooling system has a function as same as the above function of the cooling system 1 used in the cooling step (S2).
  • the first control unit 21 supplies a large amount of liquid-nitrogen to the cooling unit 3 to cool the cooling unit 3 to an initial cooling temperature (Tsv0). Thereafter, cooling of the first intermediate P1 can be initiated. After the start of the normal operation, the supply amount of the liquid nitrogen is adjusted so as to maintain a predetermined cooling temperature.
  • a second controller may be provided. The second controller may control the gate valve V2 at the time of initial introduction of the liquefied gas. The second controller may control the gate valve V2 on the basis of the measured temperature (Tpv) measured by the temperature measuring device 33 and a preset initial setting value (Tsv0).
  • the first controller 21 fully closes the control valve V1 to stop the supply of the liquid nitrogen by the first liquefied gas pipe L1.
  • the second controller fully opens the gate valve V2 and supplies the liquid nitrogen to the cooling unit 3 by the second liquefied gas pipe L2.
  • the second controller closes the gate valve V2.
  • the first controller 21 controls the control valve V1, supplies the liquid nitrogen to the cooling unit 3 by the first liquefied gas pipe L1, and adjusts the supply amount of the liquid nitrogen so as to maintain a predetermined cooling temperature.
  • the linear product is not limited to a resin hose with a reinforcing layer, and a cooling device can be similarly used for a resin-coated electric wire cable or a metal pipe coating material.
  • the stirring unit 37 is not necessarily required.
  • the stirring unit 37 may also be in a shape other than the shape mentioned above.
  • an outlet for discharging liquid nitrogen or gas into the atmosphere may be provided in the cylindrical body 30.

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

Abstract

The cooling system 1 includes a supply unit 2 for supplying the liquefied gas, and a cooling unit 3 for indirectly applying the cold energy of the liquefied gas supplied from the supply unit 2. Thesupply unit 2 includes a first liquefied gas pipe L1 connected to the inlet 34 of the cooling unit 3, a control valve V1 provided in the first liquefied gas pipe L1, and a controller 21 that adjusts the opening degree of the control valve V1 based on the measured temperature measured by the temperature measuring device 33 provided in the cooling unit 3 and controls the flow rate of the liquefied gas. The cooling unit 3 includes a cylindrical body 30 having a double-passage-structure that is provided in which liquefied gas is supplied to a space of the double-passage-structure, and cools a cooling target while the cooling target is moved in an inner hollow of the cylindrical body 30.

Description

Cooling system for linear product and method for manufacturing linear product [Field of the Invention] [0001] The present invention relates to a cooling system for a linear product and a method for manufacturing a linear product. BACKGROUND [Description of the Related Art] [0002] Patent Document 1 discloses a method for manufacturing a metal wire for reinforcing a high-pressure hose. In FIG. 1 of Patent Document 1, a structure is provided in which a plurality of reinforcing layers 2 and intermediate layers 3 are coated on the outer side of an inner surface layer 1 of a tubular, and an outer surface layer 4 is further coated. The reinforcement layer 2 is wrapped around the steel wire in a knitted or spiral manner. It is necessary to cool the inner layer before forming the reinforcing layer 2. Patent Literature 2 discloses that a coated electric wire is immersed in a water bath and cooled. As described above, in the prior art, it is common practice to immerse in a cold water bath or to cool by blowing cold air by a blower or a chiller. [Prior art documents] [0003] [Patent Document 1] JP H 10-166027 JP [Patent Document 2] JP 2007-80730 JP [0004] However, in the case of chilled water cooling, subsequent drying is necessary, and the area required for processing is also increased. In the case of cold air, the cooling is not constant, and unevenness can occur. In particular, it is not effective when it is desired to shorten the cooling time. As a cooling method in a continuous production line of a linear product, when unevenness occurs in a cooling temperature, quality in product processing is not stabilized, and deterioration in yield is a problem. In addition, the cooling apparatus may be complicated or may require time for cooling, and therefore, in order to increase the processing speed, a large space is required for the cooling apparatus. [0005] The present disclosure provides a cooling system that has a smaller installation space with a simpler apparatus than in the prior art, and can shorten a cooling time while suppressing cooling unevenness. The present disclosure also provides a method of manufacturing a linear product using the cooling system. [SUMMARY OF THE INVENTION] [0006] The cooling system (1) of the linear product includes: supply unit (2) that supplies a liquefied gas, and a cooling unit (3) that indirectly applies the cold energy of the liquefied gas supplied from the supply unit (2). Indirectly applying means that the liquefied gas is not cooled by direct contact, but cooled by providing a small non-contact space. [0007] The supply unit (2) may include: a first liquefied gas pipe (L1) that is connected to an inlet (34) of the cooling unit (3); a control valve (V1) that is provided in the first liquefied gas pipe (L1); and a first controller (21) that adjusts the opening degree of the control valve (V1) and controls the flow rate of the liquefied gas on the basis of the measured temperature (Tpv) measured by a temperature measuring device (33) provided in the cooling unit (3) and a preset set value (Tsv). [0008] The supply unit (2) may include: a second liquefied gas pipe (L2) that bypasses the upstream side and the downstream side of the control valve (V1); and a gate valve (V2) that is provided in the second liquefied gas pipe (L2). The first control unit (21) may control the gate valve (V2) at the time of initial introduction of the liquefied gas or on the basis of the measured temperature (Tpv) measured by the temperature measuring device (33) provided in the cooling unit (3) and a preset initial setting value (Tsv0). The supply unit (2) may include: a second controller that controls the gate valve (V2) at the time of initial introduction of the liquefied gas or on the basis of the measured temperature (Tpv) measured by the temperature measuring device (33) provided in the cooling unit (3) and a preset initial setting value (Tsv0). The gate valve (V2) and the control valve (V1) may be configured such that the other is not operated (completely closed state) when one is operated (valve opening or closing state, opening degree control state). The first control unit (21) may also have a function as the second control unit. [0009] The cooling unit (3) may include: a cylindrical body (30) having a double-passage-structure that is provided in which liquefied gas is supplied to a space of the double-passage-structure (interior space of double-passage- structure), and cools cooling target while the cooling target is moved in an inner hollow of the cylindrical body (30). The cylindrical body (30) having the double-passage-structure may include: a first hollow cylindrical portion (31) that is arranged at a predetermined clearance (d1) around the cooling target in the moving state; a second hollow cylindrical portion (32) that is arranged with a predetermined clearance (d2) around the first cylindrical portion (31); a temperature measuring device (33) that measures the temperature between the first hollow cylindrical portion (31) and the second cylindrical portion (32) or the temperature inside the second cylindrical portion (32); an inlet (34) that is connected between the first hollow cylindrical portion (31) and the second hollow cylindrical portion (32) and introduces the liquefied gas (e.g. liquid nitrogen) supplied from the first liquefied gas pipe (L1); and one or more through holes (31a) that are provided in the first hollow cylindrical portion (31). The temperature measurement unit (13) may be disposed on, for example, a longitudinal downstream side, an intermediate portion, or an upstream side, or one or more of the temperature measurement units may be provided. The first and second control units (21) may control a valve to be controlled (the control valve (V1) and the gate valve (V2)) based on one or more measured temperature data. [0010] The cylindrical body (30) may include: a (non-rotating) stirring unit (37) that is stationary disposed inside the double-passage-structure or between the first hollow cylindrical portion (31) and the second hollow cylindrical portion (31) to stir the flow of the liquefied gas. The stirring unit (37) may be configured a spiral rod-shaped material or a plate-shaped material between the first hollow cylindrical portion (31) and the second hollow cylindrical portion (32). At least of a part of the spiral rod-shaped material or a part of the plate-shaped material may be fixedly or detachably connected to the outer surface of the first hollow cylindrical portion (31) and/or the inner surface of the second hollow cylindrical portion (32). The stirring unit (37) may be configured one or more rod-shaped material or plate-shaped material that are fixedly or detachably connected to the outer surface of the first hollow cylindrical portion (31) and/or the inner surface of the second hollow cylindrical portion (32). [0011] The linear product is, for example, a linear product of a thermosetting resin, and examples thereof include a resin hose with a reinforcing layer, an electric wire cable coated with a resin, and a metal pipe coating material. The object to be cooled may be an intermediate of a linear product. The linear product is an elongated product of at least 10m or more, and may have a circular cross section, a rectangular shaped cross section, or a polygonal shaped cross section. The liquefied gas includes, for example, liquefied gas of an inert gas such as liquid nitrogen, liquid argon, and liquid helium, and liquid air. [0012] A method of manufacturing a linear product, that is the method of manufacturing a linear product having a plurality of layers, include: a resin layer forming step (S1) for forming a resin layer (y1) by extrusion molding of a thermoplastic resin to form a first intermediate (P1); and a cooling step (S2) for cooling the first intermediate (P1) including the resin layer (y1) formed in the resin layer forming step (S1) by the cooling system (1) while transporting the first intermediate (P1). The method may further include: a reinforcing layer forming step (S3) for forming a reinforcing layer (y2) on an outer surface of the resin layer (y1) of the cooled first intermediate (P1) after the cooling step (S3) to form a second intermediate (P2). One or more layers or electric wires may be provided on the inner peripheral surface of the resin layer (y1). In this case, in the resin layer forming step (S1) may form the resin layer (y1) on the outside (outer surface) of one or more layers or the outside (outer surface) of an electric wire by extrusion molding of a thermoplastic resin to form a first intermediate (P1). One or more layers may be formed on the outer surface of the reinforcing layer (y2). In this case, the method may further include a resin layer forming step (S4) for forming a resin layer (y3) on the outside (outer surface) of the reinforcing layer (y2) formed in the reinforcing layer forming step (S3) by extrusion molding of a thermoplastic resin to form a third intermediate (P3). The method may include a cooling step (S5) for cooling the third intermediate (P3) by the cooling system (1) while conveying the third intermediate (P3) having the resin layer (y3) formed in the resin layer forming step (S4). [0013] The above cooling system (1) and the method have the following effects. (1) Cooling time can be shortened and cooling can be efficiently performed with a simple cooling system with a small installation space. (2) The processing speed of the linear product can be improved, and the cooling unevenness can be reduced, and the yield can be improved. [Brief Description of Drawings] [0014] FIG. 1A is a diagram illustrating an example of a cooling system according to a first embodiment. FIG. 1B is a diagram illustrating an example of a cooling unit according to a first embodiment; FIG. 2 is a diagram illustrating an example of a linear product. FIG. 3 is a diagram illustrating an example of an apparatus for manufacturing a linear product. FIG. 4 is a process flow illustrating an example of a process of manufacturing a linear product. [DETAILED DESCRIPTION] [0015] Several embodiments of the present invention are described below. The embodiments described below illustrate an example of the present invention. The present invention is not limited to the following embodiments in any way, and includes various modifications that are implemented within a scope that does not change the principle of the present invention. Note that not all of the configurations described below are essential elements of the present invention. Upstream and downstream are set based on the flow direction of the liquefied gas. Upstream and downstream are set also based on the conveyance direction of the linear product. [0016] (Embodiment 1) The cooler 1 of the first embodiment will be described with reference to FIGS. 1A and 1B. The cooling system 1 includes a supply unit 2 for supplying the liquefied gas, and a cooling unit 3 for indirectly applying the cold energy of the liquefied gas supplied from the supply unit 2. In the first embodiment, the liquefied gases are liquid-nitrogen LN２. [0017] (Supply Unit) The supply unit 2 includes a first liquefied gas pipe L1, a second liquefied gas pipe L2, a control valve V1, a gate valve V2, and a first controller 21. The first liquefied gas pipe L1 is connected to the inlet 34 of the cooling unit 3. The control valve V1 is provided in the first liquefied gas pipe L1. The second liquefied gas pipe L2 bypasses the upstream side and the downstream side of the control valve V1. The gate valve V2 is provided in the second liquefied gas pipe L2. The first controller 21 adjusts the opening degree of the control valve V1 based on the measured temperature (Tpv) measured by the temperature measuring device 33(e.g., thermometer) provided in the cooling unit 3 and a preset set value (Tsv), and controls the flow rate of the liquid nitrogen LN２. In addition, the first controller 21 controls the gate valve V2 based on the measured temperature (Tpv) measured by the temperature measuring device 33 and a preset initial setting value Tsv0 when the liquid-nitrogen is initially introduced. The supply unit 2 may include a cylinder and a tank in which the liquefied gas is stored. The supply unit 2 may include a safety valve for discharging the atmosphere in the first liquefied gas pipe L1. The supply unit 2 may include a manual valve for finely adjusting the liquid feeding amount of the first liquefied gas pipe L1 and the second liquefied gas pipe L2. [0018] (Cooling Unit) The cooling unit 3 has a cylindrical body 30 having a double passage structure in which liquefied gas is supplied to a space of the double-passage-structure, and cools cooling target while the cooling target is moved in an inner hollow of the cylindrical body 30. The cylindrical body 30 includes a first hollow cylindrical portion 31, a second hollow cylindrical portion 32, a temperature measuring device 33, an inlet 34, and a stirring unit 37. The first hollow cylindrical portion 31 is disposed at a predetermined clearance (d1) around the linear product in the moving state or an intermediate(P1) thereof. The second hollow cylindrical portion 32 is disposed at a predetermined clearance (d2) around the first hollow cylindrical portion 31. Liquid nitrogen flows in the clearance (d2). The lengths of the first hollow cylindrical portion 31 and the lengths of the second hollow cylindrical portion 32 in the longitudinal direction are set in accordance with the specifications of the linear product and the cooling capacity, and are exemplified by, for example, 1m to 5m. The cross-sectional shape of the inner wall surface of the first hollow cylindrical portion 31 is set in accordance with the cross-sectional shape of the linear product or the intermediate (P1). In the first embodiment, the cross section of the linear product and the intermediate (P1) is circular. In accordance with this, the first hollow cylindrical portion 31 and the second hollow cylindrical portion 32 are also cylindrical in cross section. The size relationship among the outer diameter φ0 of the intermediate(P1), the inner diameter φ11 of the first hollow cylindrical portion 31, the outer diameter φ12 of the first hollow cylindrical portion 31, the inner diameter φ21 of the second hollow cylindrical portion 32 and the outer diameter φ22 of the second hollow cylindrical portion 32 is as follows. φ0<φ11<φ12<φ21<φ22・・(1) The clearance d1 and the clearance d2 are as follows. d1 is, for example, 0.5mm to 5mm. d2 is, for example, 5mm to 10mm. [0019] The temperature measuring device 33 measures the temperature between the first hollow cylindrical portion 31 and the second hollow cylindrical portion 32 or the temperature inside the second hollow cylindrical portion 32. The temperature measuring device 33 is provided on the downstream side or the intermediate portion of the length in the longitudinal direction of the first and second hollow cylindrical portions 31, 32. The inlet 34 is connected between the first cylindrical portion 31 and the second hollow cylindrical portion 32, and introduces liquid nitrogen supplied from the first liquefied gas pipe L1. The first hollow cylindrical portion 31 is provided with one or more through holes 31a. The liquid-nitrogen LN２ flowing between the first hollow cylindrical portion 31 and the second hollow cylindrical portion 32 become the nitrogen-gas N２ by applying the cold energy of LN2 to the linear product or the intermediate thereof . The nitrogen-gas N２ passes through the through-hole 31a and then is conveyed together with the linear product or the intermediate thereof to be released into the atmosphere. In this embodiment, both ends in the longitudinal direction of the second hollow cylindrical portion 32 are a ring-shaped first wall 351 in upstream side and a ring-shaped second wall 352 in downstream side that block the space S formed between the first hollow cylindrical portion 31 and the second hollow cylindrical portion 32. Liquid nitrogen is introduced into the space S through the inlet 34 provided in the first wall 351 or the second hollow cylindrical portion 32. Nitrogen gas or liquid nitrogen may be led out through the through-hole 31 a or the outlet provided in the second wall 352 or the second hollow cylindrical portion 32. [0020] The stirring portion 37 is stationary disposed between the first cylindrical portion 31 and the second hollow cylindrical portion 32. The stirring unit 37 is formed by a spiral rod-shaped material. [0021] (Apparatus for Manufacturing Linear Products) FIG. 2 shows an example of a linear product. The linear product represents a resin hose P with reinforcement wires. The resin hose P has a three-layer structure including a resin inner layer y1, a reinforcing layer y2, and a resin outer layer y3. FIG. 3 illustrates an example of a linear product manufacturing apparatus. The first resin extrusion molding machine 5 molds the resin inner layer y1 to produce the intermediate P1. In the steel wire winding machine 6, a steel wire is wound around the outer surface of the resin inner layer y2 to form a reinforcing layer y2, and an intermediate P2 is formed. The cooling system 1 is disposed between the first resin extruder 5 and the steel wire winding machine 6, and rapidly cools and stabilizes the resin inner layer y1. In the second resin extrusion molding machine 7, the resin outer layer y3 is molded on the outer surface of the reinforcing layer y2 to produce the intermediate P3. Line x represents the transport direction of the intermediate and the linear product. Intermediate P3 is then wound onto a roll. Before winding, cooling may be performed by the cooling system 1. [0022] (Method for Manufacturing Linear Product) FIG. 4 shows an example of a process of the manufacturing method. In the resin inner layer forming step (S1), the thermoplastic resin is extrusion molded to form the resin inner layer y1, thereby producing the first intermediate P1. In the cooling step (S2), the first intermediate P1 including the resin inner layer y1 formed in the resin layer forming step (S1) is cooled by the cooling system 1 while being conveyed. [0023] In the cooling preparation period, the first controller 21 fully closes the control valve V1, fully opens the gate valve V2, and supplies the liquefied gas to the cooling unit 3 through the second liquefied gas pipe L2. When the measured temperature (Tpv) becomes the initial setting value (Tsv0), the first controller 21 closes the gate valve V2. After the normal operation is started, the first controller 21 adjusts the opening degree of the control valve V1 based on the measured temperature (Tpv) measured by the temperature measuring device 33 and a preset set value (Tsv), and controls the flow rate of the liquid nitrogen LN2. The initial setting value (Tsv0) and the preset set value (Tsv) may be the same value or different values. The initial setting value (Tsv0) and the preset set value (Tsv) may be set by the resin-inner layer y1 and the reinforcing layer y2. [0024] In the reinforcing layer forming step (S3), after the cooling step (S3), the reinforcing layer y2 is formed on the outer surface of the resin inner layer y1 of the first intermediate P1, thereby producing the second intermediate P2. In the resin outer layer forming step (S4), the resin layer y3 is formed on the outer surface of the reinforcing layer y2 by extrusion molding of the thermoplastic resin, thereby producing the third intermediate P3. Further, in the third intermediate P3, the resin outer layer 3 formed in the resin layer forming step (S4) is cooled by a cooling system while being conveyed. The cooling system has a function as same as the above function of the cooling system 1 used in the cooling step (S2). [0025] (Examples) The resin hose was extrusion molded and then cooled by the cooling system 1. Outer diameter of the resin layer: 18 mm First hollow cylindrical portion 31: length 1.5m, inner diameter 20mm, outer diameter 22mm Second hollow cylindrical portion 32: length 1.5m, inner diameter 32mm, outer diameter 34mm Clearance d1: 2.5mm Clearance d2: 5mm stirring unit: a spiral shape of a rod having a diameter of 4mm Cooling temperature (preset set value (Tsv)): -30°C A solenoid valve is used as a control valve and is controlled within ±1°C of the preset set value by ON/OFF control. The supply amount of the liquefied nitrogen was about 0.06 kg/min during steady-state operation. [0026] (Other Embodiment) (1) In the cooling preparation period, the first control unit 21 supplies a large amount of liquid-nitrogen to the cooling unit 3 to cool the cooling unit 3 to an initial cooling temperature (Tsv0). Thereafter, cooling of the first intermediate P1 can be initiated. After the start of the normal operation, the supply amount of the liquid nitrogen is adjusted so as to maintain a predetermined cooling temperature. (2) In addition to the first controller, a second controller may be provided. The second controller may control the gate valve V2 at the time of initial introduction of the liquefied gas. The second controller may control the gate valve V2 on the basis of the measured temperature (Tpv) measured by the temperature measuring device 33 and a preset initial setting value (Tsv0). In the cooling preparation period, the first controller 21 fully closes the control valve V1 to stop the supply of the liquid nitrogen by the first liquefied gas pipe L1. The second controller fully opens the gate valve V2 and supplies the liquid nitrogen to the cooling unit 3 by the second liquefied gas pipe L2. When the measured temperature (Tpv) becomes the initial setting value (Tsv0), the second controller closes the gate valve V2. After the normal operation is started, the first controller 21 controls the control valve V1, supplies the liquid nitrogen to the cooling unit 3 by the first liquefied gas pipe L1, and adjusts the supply amount of the liquid nitrogen so as to maintain a predetermined cooling temperature. (3) The linear product is not limited to a resin hose with a reinforcing layer, and a cooling device can be similarly used for a resin-coated electric wire cable or a metal pipe coating material. (4) The stirring unit 37 is not necessarily required. The stirring unit 37 may also be in a shape other than the shape mentioned above. (5) Without being limited to the through-hole 31a, an outlet for discharging liquid nitrogen or gas into the atmosphere may be provided in the cylindrical body 30. [Explanation of Reference numerals] [0027] 1 cooling system 2 supply unit 21 first controller 3 cooling unit 31 first hollow cylindrical portion 32 second hollow cylindrical portion 33 temperature measuring device 34 inlet 31 a through hole V1 control valve V2 gate valve

Claims

Claims 1. A cooling system comprising: a supply unit that supplies liquefied gas; and a cooling unit that indirectly applies cold energy of the liquefied gas supplied from the supply unit; wherein the supply unit comprising, a first liquefied gas pipe that is connected to an inlet of the cooling unit, a control valve that is provided in the first liquefied gas pipe; and a controller that adjusts an opening degree of the control valve and controls the flow rate of the liquefied gas on the basis of the measured temperature (Tpv) measured by a temperature measuring device provided in the cooling unit and a preset set value (Tsv). 2. The cooling system according to claim 1, wherein the supply unit further comprising, a second liquefied gas pipe that bypasses the upstream side and the downstream side of the control valve; and a gate valve that is provided in the second liquefied gas pipe. 3. The cooling system according to claim 1, wherein the cooling unit comprising, a cylindrical body having a double-passage-structure that is provided in which liquefied gas is supplied to a space of the double- passage-structure, and cools cooling target while the cooling target is moved in an inner hollow of the cylindrical body. 4. The cooling system according to claim 3, wherein the cylindrical body comprising, a first hollow cylindrical portion that is arranged at a predetermined clearance (d1) around the cooling target in the moving state, a second hollow cylindrical portion that is arranged with a predetermined clearance (d2) around the first cylindrical portion, a temperature measuring device that measures the temperature between the first hollow cylindrical portion and the second hollow cylindrical portion or the temperature inside the second hollow cylindrical portion, an inlet that is connected between the first hollow cylindrical portion and the second hollow cylindrical portion and introduces the liquefied gas supplied from the first liquefied gas pipe; and one or more through holes that are provided in the first hollow cylindrical portion. 5. The cooling system according to claim 3, wherein the cylindrical body comprising, a stirring unit that stirs the flow of liquefied gas. 6. A method of manufacturing a linear product having a plurality of layers, comprising: a resin layer forming step for forming a resin layer (y1) by extrusion molding of a thermoplastic resin to form a first intermediate (P1); and a cooling step for cooling the first intermediate (P1) including the resin layer (y1) formed in the resin layer forming step by a cooling system according to any one of claim 1 to 4 while transporting the first intermediate (P1).
PCT/EP2022/079554 2022-10-24 2022-10-24 Cooling system for linear product and method for manufacturing linear product WO2024088499A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190473A (en) * 1976-12-30 1980-02-26 Messer Griesheim Gmbh Process for accelerating the hardening of joints glued with crystalline hardening adhesives
US4212171A (en) * 1977-10-08 1980-07-15 Messer Griesheim Gmbh Device in the form of a double-walled pipe for cooling continuous profiles
JPH06270238A (en) * 1993-03-24 1994-09-27 Nippon Sanso Kk Apparatus and method for producing hollow molded product
JPH10166027A (en) 1996-12-10 1998-06-23 Yokohama Rubber Co Ltd:The Manufacture of metallic wire for reinforcing high pressure hose, and high pressure hose
WO2003106903A1 (en) * 2002-06-17 2003-12-24 Material Enhancement International, Llc Cryogenic cooling system apparatus and method
JP2007080730A (en) 2005-09-15 2007-03-29 Cte Co Ltd Cooling method of coated electric wire, its cooling tank, and electric wire coating machine having cooling tank

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190473A (en) * 1976-12-30 1980-02-26 Messer Griesheim Gmbh Process for accelerating the hardening of joints glued with crystalline hardening adhesives
US4212171A (en) * 1977-10-08 1980-07-15 Messer Griesheim Gmbh Device in the form of a double-walled pipe for cooling continuous profiles
JPH06270238A (en) * 1993-03-24 1994-09-27 Nippon Sanso Kk Apparatus and method for producing hollow molded product
JPH10166027A (en) 1996-12-10 1998-06-23 Yokohama Rubber Co Ltd:The Manufacture of metallic wire for reinforcing high pressure hose, and high pressure hose
WO2003106903A1 (en) * 2002-06-17 2003-12-24 Material Enhancement International, Llc Cryogenic cooling system apparatus and method
JP2007080730A (en) 2005-09-15 2007-03-29 Cte Co Ltd Cooling method of coated electric wire, its cooling tank, and electric wire coating machine having cooling tank

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