WO2024111114A1 - 押出機 - Google Patents

押出機 Download PDF

Info

Publication number
WO2024111114A1
WO2024111114A1 PCT/JP2022/043553 JP2022043553W WO2024111114A1 WO 2024111114 A1 WO2024111114 A1 WO 2024111114A1 JP 2022043553 W JP2022043553 W JP 2022043553W WO 2024111114 A1 WO2024111114 A1 WO 2024111114A1
Authority
WO
WIPO (PCT)
Prior art keywords
extruder
region
pair
cylinder
cylinders
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.)
Ceased
Application number
PCT/JP2022/043553
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
大吾 佐賀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works 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 Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to CN202280101928.1A priority Critical patent/CN120225335A/zh
Priority to PCT/JP2022/043553 priority patent/WO2024111114A1/ja
Priority to JP2024559822A priority patent/JPWO2024111114A1/ja
Priority to EP22966523.7A priority patent/EP4606555A1/en
Priority to TW112126157A priority patent/TW202421403A/zh
Publication of WO2024111114A1 publication Critical patent/WO2024111114A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or cylinders
    • B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/84—Venting or degassing ; Removing liquids, e.g. by evaporating components
    • B29B7/845—Venting, degassing or removing evaporated components in devices with rotary stirrers
    • 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
    • B29C48/267—Intermediate treatments, e.g. relaxation, annealing or decompression step for the melt
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or cylinders
    • B29C48/682—Barrels or cylinders for twin screws
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or cylinders
    • B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
    • B29C48/686—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having grooves or cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
    • 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
    • B29C2948/92561—Time, e.g. start, termination, duration or interruption
    • 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
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • 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
    • 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
    • B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
    • B29C48/2526—Direct drives or gear boxes
    • 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
    • B29C48/256—Exchangeable extruder parts
    • B29C48/2565—Barrel parts
    • 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
    • B29C48/286—Raw material dosing
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/55—Screws having reverse-feeding elements
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
    • 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
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating

Definitions

  • the present invention relates to an extruder that melts and kneads resin raw materials.
  • Patent Document 1 describes an extruder that melts and kneads resin raw materials.
  • the extruder described in Patent Document 1 includes a cylinder and a screw, with the screw disposed inside the cylinder. As a result, the resin raw materials supplied from an inlet to the inside of the cylinder are melted and kneaded as the screw rotates, and are transported toward the outlet.
  • the extruder has a cylinder whose internal cross-sectional area is larger in some areas than in other areas.
  • the processing capacity of the resin raw material can be increased without increasing the size of the extruder.
  • FIG. 2 is a partial cross-sectional view showing the structure of an extruder.
  • FIG. 2 is a cross-sectional view showing a kneading processing unit of the first embodiment.
  • 3 is a cross-sectional view taken along lines AA and CC in FIG. 2.
  • 3 is a cross-sectional view taken along line BB in FIG. 2.
  • FIG. FIG. 2 is a side view of a progressive flight.
  • FIG. FIG. 1 is a table comparing residence times of the first embodiment and a comparative example.
  • FIG. 11 is a cross-sectional view showing a kneading processing unit of the second embodiment.
  • FIG. 11 is a cross-sectional view showing a kneading processing unit of the third embodiment.
  • FIG. 13 is a perspective view showing a reverse feed flight.
  • FIG. 2 is a side view of the reverse flight.
  • FIG. FIG. 1 is a side view of reverse kneading.
  • FIG. 11 is a diagram showing a fourth embodiment, corresponding to FIG. 4.
  • FIG. 11 is a diagram showing a fifth embodiment, corresponding to FIG. 4.
  • FIG. 13 is a diagram showing a sixth embodiment, corresponding to FIG. 4.
  • FIG. 13 is a diagram showing a seventh embodiment, corresponding to FIG. 4.
  • FIG. 13 is a diagram showing an eighth embodiment, corresponding to FIG. 4.
  • FIG. 13 is a diagram showing a ninth embodiment, corresponding to FIG. 4.
  • FIG. 13 is a diagram showing a tenth embodiment, corresponding to FIG. 4.
  • FIG. 11 is a diagram showing a tenth embodiment, corresponding to FIG. 4.
  • FIG. 17 is a diagram showing an eleventh embodiment, corresponding to FIG. 4.
  • FIG. 23 is a diagram showing a twelfth embodiment, corresponding to FIG. 4.
  • FIG. 23 is a diagram showing embodiment 13, corresponding to FIG. 4.
  • FIG. 23 is an enlarged cross-sectional view showing a kneading processing unit of embodiment 14.
  • FIG. 23 is an enlarged cross-sectional view showing a kneading processing unit of embodiment 15.
  • FIG. 21 is a partial cross-sectional view showing a part of an extruder of a sixteenth embodiment.
  • FIG. 21 is a diagram showing embodiment 17, corresponding to FIG. 4.
  • FIG. 21 is a diagram corresponding to FIG. 4 and showing embodiment 18.
  • FIG. 23 is a diagram showing a nineteenth embodiment, corresponding to FIG. 4.
  • an extruder 10 of the first embodiment is used for melt-kneading resin pellets (resin raw material) PR.
  • the extruder 10 is used for producing reinforcing fibers such as tire cords.
  • the tire cord is a material that maintains the shape of a rubber tire for an automobile or the like.
  • the extruder 10 is a twin-screw extruder equipped with two screws 50.
  • the extruder 10 is equipped with a kneading processing section 20 having a pair of screws 50 arranged therein and a cylinder unit CU (a pair of cylinders 21, 22) to which resin pellets PR are supplied, and a drive section 40 that rotates the pair of screws 50.
  • the kneading processing section 20 is provided with a hopper 23.
  • the hopper 23 is formed in a substantially cylindrical shape, and granular resin pellets PR are stored inside the hopper 23.
  • the hopper 23 has a pellet inlet 24 and a pellet outlet 25, and the resin pellets PR are fed from a gravimetric feeder FD toward the pellet inlet 24.
  • the gravimetric feeder FD is installed on an upper floor FL2 or the like provided above the installation floor FL1 on which the extruder 10 is installed.
  • the resin pellets PR stored in the hopper 23 descend by gravity toward the pellet discharge port 25 and are supplied from the pellet discharge port 25 into the inside of a small block BL1 (a pair of cylinders 21, 22) located downstream.
  • a small block BL1 a pair of cylinders 21, 22 located downstream.
  • the side where the hopper 23 of the kneading processing unit 20 is installed i.e., the side where the resin pellets PR before melt-kneading are supplied, is the "upstream side”.
  • the side where the conveying pipe P of the extruder 10 is located i.e., the side where the molten resin MR after melt-kneading is discharged, is the "downstream side".
  • the drive unit 40 includes an electric motor 41 as a drive source, and a reducer 42 that reduces the speed of the electric motor 41 to increase the torque. Specifically, the rotational force of the rotary shaft 41a of the electric motor 41 is transmitted to the reducer 42, and the reduced and increased torque rotational force is transmitted from the output shaft 42a of the reducer 42 to a pair of screws 50 (a pair of shafts 51) of the kneading processing unit 20 via a gear mechanism or the like (not shown). As a result, the pair of screws 50 are rotated in the same direction. However, the pair of screws 50 can also be rotated in different directions depending on the purpose of the melt-kneading process, etc.
  • the rotation speed of the pair of screws 50 is precisely controlled by controlling the rotation speed of the electric motor 41.
  • the drive unit 40 consisting of the electric motor 41 and the reducer 42, is supported by a base BS fixed to the installation floor FL1. Furthermore, the rotation shaft 41a and the output shaft 42a are parallel to the installation floor FL1.
  • the kneading processing section 20 includes a cylinder unit CU.
  • the cylinder unit CU is formed by arranging a pair of (two) cylinders 21, 22 in parallel with each other and integrating them together.
  • a two-dot chain line (imaginary line) is drawn between the pair of cylinders 21, 22 to make them easier to understand.
  • the cylinder unit CU is parallel to the installation floor FL1, as are the rotation shaft 41a and the output shaft 42a.
  • the cylinder unit CU is supported by a base BS fixed to the installation floor FL1.
  • the cylinder unit CU is made up of a total of nine small and large blocks BL1 to BL9. Specifically, the cylinder unit CU is made up of a total of nine small and large blocks BL1 to BL9 arranged in the axial direction of the rotating shaft 41a and the output shaft 42a and connected to each other.
  • the small block BL1 is provided with a supply port 26 that opens in a direction perpendicular to the installation floor FL1 and faces the pellet discharge port 25 of the hopper 23.
  • the resin pellets PR stored in the hopper 23 are supplied to the inside of the pair of cylinders 21, 22 via the pellet discharge port 25 and the supply port 26.
  • the small block BL9 located downstream of the cylinder unit CU, i.e., on the conveying pipe P side, is an "exit block” that discharges the molten resin MR generated after melting and kneading the resin pellets PR to the outside of the cylinder unit CU.
  • a molten resin discharge port (discharge port) 27 for discharging the molten resin MR to the outside is provided inside the small block BL9 (inside the pair of cylinders 21, 22.
  • a molten resin discharge port (discharge port) 27 for discharging the molten resin MR to the outside is provided inside the small block BL9 (inside the pair of cylinders 21, 22).
  • a molten resin discharge port (discharge port) 27 for discharging the molten resin MR to the outside is provided inside the small block BL9 (inside the pair of cylinders 21, 22.
  • a conveying pipe P is disposed to convey the molten resin MR to the next process
  • small block BL2 is connected downstream of small block BL1, and a pair of small transport paths TP1 (see Figures 2 and 3) are provided inside small block BL2 (inside the pair of cylinders 21, 22).
  • a heater HT is attached to the outer periphery of small block BL2. As a result, the resin pellets PR passing through the pair of small transport paths TP1 of small block BL2 are heated and melted by the heater HT.
  • a pair of small blocks BL7, BL8, which have the same shape and structure as the small block BL2 are arranged side by side. That is, a pair of small transport paths TP1 are provided inside the small blocks BL7, BL8 (inside the pair of cylinders 21, 22), respectively. Furthermore, heaters HT are attached to the outer periphery of the small blocks BL7, BL8, respectively. As a result, the molten resin MR passing through the small blocks BL7, BL8 reaches the small block BL9 in a molten state without hardening.
  • a total of four large blocks BL3 to BL6, which are larger than the small blocks BL2, BL7, and BL8, are arranged side by side between the small block BL2 and the small block BL7.
  • a pair of large conveying paths TP2 are provided inside each of the large blocks BL3 to BL6 (inside the pair of cylinders 21, 22).
  • Heaters HT are also attached to the outer periphery of each of the large blocks BL3 to BL6. As a result, the resin pellets PR passing through the large blocks BL3 to BL6 are kneaded and turned into molten resin MR. In addition to being heated by the heaters HT, the resin pellets PR are also heated by heat generated by the shearing action that accompanies the rotation of the pair of screws 50.
  • the inner diameter d1 of the small transport path TP1 of the small blocks BL2, BL7, and BL8 is smaller than the inner diameter d2 of the large transport path TP2 of the large blocks BL3 to BL6 (d1 ⁇ d2). That is, referring to Figure 2, the cross-sectional area of the cylinders 21 and 22 perpendicular to the direction from the supply area AR1 to the kneading area AR2 is larger in some areas than in other areas. Specifically, the cross-sectional area S2 inside the kneading area AR2 is larger than the cross-sectional area S1 inside the supply area AR1 (S2 > S1).
  • the conversion adapter 28 between the small block BL2 and the large block BL3 has an inner diameter that gradually increases from the upstream side to the downstream side.
  • the conversion adapter 29 between the large block BL6 and the small block BL7 has an inner diameter that gradually decreases from the upstream side to the downstream side.
  • a screw 50 is rotatably housed inside the small conveying path TP1 and the large conveying path TP2, which are provided on a pair of cylinders 21 and 22, respectively.
  • the structure of the small conveying path TP1, the large conveying path TP2, and the screw 50 housed therein will be described in detail below.
  • the large transport path TP2 of one cylinder 21 and the large transport path TP2 of the other cylinder 22 are arranged parallel to each other and communicate with each other.
  • the distance L between the centers c2 of the large transport paths TP2 is smaller than the inner diameter d2 of the large transport paths TP2 (L ⁇ d2).
  • the inner diameter d2 of the large transport path TP2 is larger than the inner diameter d1 of the small transport path TP1 (d2 > d1).
  • the pair of screws 50 are all of the same shape.
  • the pair of screws 50 are disposed inside the pair of cylinders 21, 22 (small conveying path TP1, large conveying path TP2), respectively.
  • the pair of screws 50 have the function of conveying the resin raw material (resin pellets PR, molten resin MR) present in the small conveying path TP1 and the large conveying path TP2 of the pair of cylinders 21, 22 from the upstream side to the downstream side while kneading them.
  • the distance L between the rotation centers c3 of the pair of screws 50 is the same as the distance L between the centers c1 of the small conveying path TP1 and the distance L between the centers c2 of the large conveying path TP2.
  • the outer diameter of the screw 50 (dashed line in the figure) is a uniform outer diameter d3 over the entire longitudinal area of the screw 50.
  • the distance L between the rotation centers c3 of the pair of screws 50 is smaller than the outer diameter d3 of the screws 50 (L ⁇ d3).
  • This minute clearance CL is on the order of a few millimeters, and is large enough that the screw 50 will not come into contact with the small transport path TP1 even if a relatively large load (lateral force) is applied to the screw 50 when the extruder 10 is in operation.
  • the rotation center c3 of the screws 50 is offset by a distance t1 toward the installation floor FL1 side (lower side in the figure) with respect to the center c2 of the large conveying path TP2.
  • the rotation center c3 of the pair of screws 50 is offset toward the lower walls 21a, 22a that form the large conveying path TP2 of the pair of cylinders 21, 22, respectively.
  • a lower clearance CL1 is provided between the screw 50 and the lower walls 21a, 22a that form the large conveying path TP2.
  • an upper clearance CL2 is provided between the screw 50 and the upper walls 21b, 22b that form the large conveying path TP2 and are on the opposite side to the side on which the lower walls 21a, 22a are provided.
  • the upper clearance CL2 is larger than the lower clearance CL1 (CL2>CL1).
  • the lower clearance CL1 is approximately the same size as the minute clearance CL (see FIG. 3) of the small transport path TP1 (CL1 ⁇ CL).
  • the upper clearance CL2 is approximately nine times the size of the lower clearance CL1 (CL2 ⁇ 9 x CL1). This prevents the resin raw material (resin pellets PR, molten resin MR) from being stuck for long periods of time on the installation floor FL1 side of the large transport path TP2, that is, on the lower side in the direction of gravity.
  • the molten resin MR bulges out of the upper clearance CL2 of the large conveying path TP2 due to centrifugal force generated when the screw 50 rotates. This makes it possible to slow down the conveying speed of the molten resin MR downstream inside the large conveying path TP2. This makes it possible to increase the residence time (reaction time) of the molten resin MR inside the large conveying path TP2 and increase processing capacity.
  • a long shaft 51 made of a solid round steel bar is provided at the center of rotation of the screw 50.
  • a plurality of screw elements are attached to the shaft 51 so that they cannot rotate relative to each other.
  • a progressive flight 52 (see FIG. 5A and FIG. 5B) and a progressive kneader 53 (see FIG. 6A and FIG. 6B) are attached to the shaft 51.
  • the progressive flight 52 and the progressive kneader 53 have the function of kneading and transporting the resin raw material (resin pellets PR, molten resin MR) from the upstream side to the downstream side as the rotating shaft 41a of the electric motor 41 rotates in one direction.
  • the number and arrangement of the progressive flights 52 and progressive kneaders 53 attached to the shaft 51 can be set arbitrarily depending on the specifications required for the extruder 10 (such as the purpose of the melt-kneading process).
  • the progressive flight 52 forms a conveying portion of the screw 50 and has a shape shown in Figures 5A and 5B. Specifically, the progressive flight 52 is formed in a right-handed screw shape with a helical thread 52a so that, when the rotation direction of the shaft 51 (see Figure 2) is the clockwise direction indicated by the arrow CW in the figure, the resin raw material (resin pellets PR, molten resin MR) moves in the direction indicated by the arrow F in the figure (forward direction).
  • the center of rotation of the progressive flight 52 is provided with a fixed hole 52b through which the shaft 51 is inserted.
  • the shaft 51 is fitted with serrations in the fixed hole 52b to enable large torque transmission.
  • the main function of the progressive flight 52 is to transport the resin raw material (resin pellets PR, molten resin MR) inside the pair of cylinders 21, 22.
  • the forward kneading 53 forms the kneading portion of the screw 50 and has a shape shown in Fig. 6A and Fig. 6B.
  • the forward kneading 53 is formed in a shape in which a plurality of angular portions 53a are arranged in a spiral shape so that, when the rotation direction of the shaft 51 is the clockwise direction of the arrow CW in the figure, the forward kneading conveys the resin raw material (resin pellets PR, molten resin MR) while kneading it in the direction of the arrow F in the figure (forward direction).
  • a fixed hole 53b through which the shaft 51 is inserted is provided at the center of rotation of the progressive kneader 53.
  • the shaft 51 is also serrated and fitted into the fixed hole 53b to enable large torque transmission.
  • the main function of the progressive kneader 53 is to knead the resin raw material (resin pellets PR, molten resin MR) inside the pair of cylinders 21, 22.
  • a supply area (first area) AR1 is provided on the upstream side of the cylinder unit CU, i.e., on the hopper 23 side, for supplying the resin pellets PR supplied to the pair of cylinders 21, 22 to the downstream side of the cylinder unit CU. That is, the pair of cylinders 21, 22 include the supply area AR1, and the hopper 23 for feeding the resin pellets PR into the pair of cylinders 21, 22 is provided in the supply area AR1.
  • the supply area AR1 is formed by a small block BL1, which is an inlet block, and a small block BL2.
  • the screw 50 located in the supply area AR1 includes a total of four progressive flights 52.
  • the resin pellets PR supplied to the inside of the pair of cylinders 21, 22 are transported from the supply area AR1 toward the kneading area AR2 as the pair of screws 50 rotate.
  • the heater HT is provided only in the small block BL2
  • the resin pellets PR are not completely melted.
  • the resin pellets PR are only softened (become soft).
  • a kneading area (second area) AR2 is provided downstream of the supply area AR1, which melts and kneads the resin pellets PR and transports the kneaded molten resin MR to the downstream side of the cylinder unit CU. That is, the pair of cylinders 21 and 22 includes the kneading area AR2, which occupies approximately half of the cylinder unit CU. Specifically, the kneading area AR2 is formed by a total of four large blocks BL3 to BL6.
  • the screw 50 located in the kneading area AR2 includes three sets of six sequential kneadings 53 and three sequential flights 52.
  • the resin pellets PR supplied from the supply area AR1 are melted and kneaded inside the kneading area AR2 (large conveying path TP2) as the pair of screws 50 rotate.
  • the resin pellets PR can be reliably melted.
  • the molten resin MR can be sufficiently kneaded.
  • This slows down the conveying speed of the molten resin MR to the downstream side inside the large conveying path TP2.
  • the residence time of the molten resin MR inside the large conveying path TP2 is extended, increasing the processing capacity.
  • a metering area (third area) AR3 is provided adjacent to the downstream side of the kneading area AR2 via a conversion adaptor 29, which homogenizes the melted and kneaded molten resin MR.
  • the pair of cylinders 21 and 22 includes the metering area AR3.
  • the metering area AR3 is formed by two small blocks BL7 and BL8, and the cross-sectional area S1 inside the metering area AR3 (small conveying path TP1) is equal to the cross-sectional area S1 inside the supply area AR1 (small conveying path TP1) (see FIG. 3).
  • the cross-sectional area of the cylinders 21 and 22 perpendicular to the direction from the supply area AR1 to the kneading area AR2 is larger in the cross-sectional area S2 inside the kneading area AR2 (large conveying path TP2) than in the cross-sectional areas S1 inside the supply area AR1 (small conveying path TP1) and the metering area AR3 (small conveying path TP1).
  • the screw 50 located within the metering area AR3 includes a total of five progressive flights 52.
  • the molten resin MR supplied from the kneading area AR2 is transported in a molten state to the downstream side of the metering area AR3 as the pair of screws 50 rotate.
  • the molten state of the molten resin MR is reliably maintained because heaters HT are attached to both small blocks BL7 and BL8. Therefore, the homogenized molten resin MR reaches the small block BL9, which is the outlet block, in a stable state without generating pulsation or the like.
  • a discharge area AR4 consisting of a small block BL9 (exit side block) is provided downstream of the metering area AR3.
  • the pair of cylinders 21, 22 includes the discharge area AR4.
  • the molten resin MR supplied to the discharge area AR4 by the rotation of the pair of screws 50 is discharged to the outside of the cylinder unit CU through the molten resin discharge port 27. That is, the kneading area AR2 is connected to the molten resin discharge port 27 for discharging the molten resin MR after kneading through the metering area AR3 and the discharge area AR4.
  • the molten resin MR then passes through the conveying pipe P to reach the processing device (not shown) of the next process.
  • the numerical values of the size of the extruder 10 in embodiment 1 are as follows: the outer diameter d3 of the screw 50 is 47 mm, the inner diameter d2 of the large transport path TP2 of the large blocks BL3-BL6 is 69 mm, and the offset (distance t1) of the rotation center c3 of the screw 50 toward the installation floor FL1 (downward in the figure) from the center c2 of the large transport path TP2 is 11 mm.
  • the resin raw material (resin pellets PR, molten resin MR) used in the measurements was polypropylene with an MFR (metal flow rate) of 10, mixed with a small amount of carbon black master batch to make it easier to measure the residence time.
  • a timer was started when the master batch was supplied to the cylinder unit CU, and stopped when the black molten resin MR was discharged from the molten resin discharge port 27, thereby measuring the time it took for the resin raw material to pass through the inside of the cylinder unit CU, i.e., the residence time.
  • the comparative example used an extruder (not shown) that was similar in size to the extruder 10 of the first embodiment and had a small conveying path TP1 with a cross-sectional area S1 throughout the entire cylinder unit CU.
  • the extruder of the comparative example does not have a large conveying path TP2 (large blocks BL3 to BL6).
  • the rotation speed of the pair of screws 50 was set to "150 rpm” and the discharge amount of resin raw material per unit time was set to "100 kg/h” to achieve the same operating conditions as in embodiment 1, and when measurements were performed multiple times under the same conditions, the average residence time was "40 sec.” Also, as in embodiment 1, the rotation speed of the pair of screws 50 was doubled to "300 rpm" and the discharge amount of resin raw material per unit time was set to "200 kg/h,” and when measurements were performed multiple times under the same conditions, the average residence time was "19 sec.”
  • the residence time of the resin raw material (resin pellets PR, molten resin MR) inside the cylinder unit CU can be approximately "three times" longer than in the comparative example.
  • the size of the inner diameter d2 of the large conveying path TP2 relative to the outer diameter d3 of the screw 50 must not be too large. Specifically, it is desirable for the inner diameter d2 of the large conveying path TP2 to be "2 to 3 times" the outer diameter d3 of the screw 50. If it is made larger than this (for example, 10 times), the resin raw material (resin pellets PR, molten resin MR) will have difficulty flowing inside the cylinder unit CU, and the resin raw material will become stuck in the upper clearance CL2 (see Figure 4) above the large conveying path TP2 and will not be discharged. As a result, it will become necessary to frequently perform maintenance work to remove the resin raw material that is stuck in the upper clearance CL2.
  • the internal cross-sectional area of the pair of cylinders 21, 22 in the direction perpendicular to the direction from the supply area AR1 to the kneading area AR2 is larger in the kneading area AR2 (cross-sectional area S2) than in the supply area AR1 (cross-sectional area S1) (S2>S1).
  • the extruder 60 of the second embodiment differs from the extruder 10 of the first embodiment (see Fig. 2) only in that it does not include the metering area AR3. In exchange for this, the extruder 60 of the second embodiment has a longer range of the kneading area AR2.
  • large blocks BL10 and BL11 are used instead of the small blocks BL7 and BL8 that form the metering area AR3 of the extruder 10 of the first embodiment, while the conversion adapter 29 (see FIG. 2) is omitted. That is, from the upstream side to the downstream side of the cylinder unit CU, small blocks BL1, BL2, large blocks BL3 to BL6, BL10, BL11, and small block BL9 are arranged in this order.
  • the newly added large blocks BL10 and BL11 have the same shape and structure as large blocks BL3 to BL6.
  • the extruder 60 of the second embodiment configured as described above can achieve substantially the same effects as the extruder 10 of the first embodiment described above.
  • the extruder 60 of the second embodiment can extend the range of the kneading region AR2, which makes it possible to extend the residence time of the resin raw material (resin pellets PR, molten resin MR) and further increase the processing capacity.
  • a total of five progressive flights 52 are arranged downstream of the pair of screws 50, but some or all of the total of five progressive flights 52 can be changed to progressive kneading flights 53 depending on the purpose of the melt kneading process, etc.
  • the extruder 70 of the third embodiment differs from the extruder 10 of the first embodiment (see FIG. 2) in that only the shapes of some of the multiple screw elements that form a pair of screws 50 are different.
  • a reverse feed flight 71 and reverse feed kneading 72 are arranged in the portion located downstream of the kneading area AR2 of the pair of screws 50. That is, the kneading section located in the kneading area AR2 includes reverse feed kneading.
  • a pair of reverse feed flights 71 and six reverse feed kneading 72 are provided across the portion of the large blocks BL5, BL6 and the conversion adapter 29. In the area RSA where these reverse feed flights 71 and reverse feed kneading 72 are arranged, the six reverse feed kneading 72 are lined up so as to be sandwiched between the pair of reverse feed flights 71.
  • the reverse flight 71 has a similar shape to the forward flight 52 of embodiment 1 (see Figures 5A and 5B). However, while the forward flight 52 transports the resin raw material (resin pellets PR, molten resin MR) in the forward direction (from the upstream side to the downstream side), the reverse flight 71 transports the resin raw material in the reverse direction (from the downstream side to the upstream side).
  • the forward flight 52 transports the resin raw material (resin pellets PR, molten resin MR) in the forward direction (from the upstream side to the downstream side)
  • the reverse flight 71 transports the resin raw material in the reverse direction (from the downstream side to the upstream side).
  • the reverse feed flight 71 is formed in a reverse screw shape with a helical thread 71a so that, when the rotation direction of the shaft 51 (see FIG. 2) is the clockwise direction indicated by the arrow CW in the figure, the resin raw material moves in the direction indicated by the arrow R in the figure (reverse direction).
  • a fixing hole 71b through which the shaft 51 is inserted is provided at the rotation center of the reverse feed flight 71, and the shaft 51 is serrated fitted into the fixing hole 71b.
  • the reverse kneading 72 has a similar shape to the forward kneading 53 of embodiment 1 (see Figures 6A and 6B). However, while the forward kneading 53 transports the resin raw material (resin pellets PR, molten resin MR) in the forward direction (from the upstream side to the downstream side) while kneading it, the reverse kneading 72 transports the resin raw material in the reverse direction (from the downstream side to the upstream side) while kneading it.
  • the forward kneading 53 transports the resin raw material (resin pellets PR, molten resin MR) in the forward direction (from the upstream side to the downstream side) while kneading it
  • the reverse kneading 72 transports the resin raw material in the reverse direction (from the downstream side to the upstream side) while kneading it.
  • the extruder 70 of embodiment 3 configured as described above can achieve substantially the same effects as the extruder 10 of embodiment 1 described above.
  • the extruder 70 of embodiment 3 includes a reverse flight 71 and a reverse kneading 72 in the portion located downstream of the kneading area AR2 of the pair of screws 50, which feed the resin raw material (resin pellets PR, molten resin MR) in the opposite direction to the forward direction from the supply area AR1 to the kneading area AR2. This makes it possible to further increase the residence time of the resin raw material in the kneading area AR2, and further increase the processing capacity.
  • both the reverse flight 71 and the reverse kneading 72 are arranged, but depending on the purpose of the melt kneading process, for example, the reverse flight 71 may be omitted and only the reverse kneading 72 may be provided.
  • neutral kneading (not shown) can be used instead of the reverse feed kneading 72 in FIG. 9.
  • neutral kneading refers to kneading only, without forward or reverse feed of the resin raw material. In other words, neutral kneading is not a kneading section with a transport capacity.
  • the extruder 80 of embodiment 4 differs from the extruder 10 of embodiment 1 (see FIG. 4) only in that the lower clearance CL1 has been reduced to almost zero, and in that the shape of the large conveying path TP2 of the pair of cylinders 21, 22 that form the large blocks BL3 to BL6 has been changed.
  • the rotation center c3 of the pair of screws 50 is offset by a distance t2 (t2 > t1) from the center c2 of the pair of cylinders 21, 22 (the pair of large conveying paths TP2) toward the lower walls 21a, 22a of the pair of cylinders 21, 22, thereby making the lower clearance CL1 "almost zero.”
  • a convex portion 81 is provided that fits between a pair of adjacent screws 50.
  • An arc portion 82 that follows the outer shape of the screw 50 is provided at the portion of the convex portion 81 that faces the pair of screws 50 (two locations in total).
  • the radius of the arc portion 82 is approximately the same as the radius of the outer diameter of the screw 50.
  • the extruder 80 of embodiment 4 configured as described above can achieve substantially the same effects as the extruder 10 of embodiment 1 described above.
  • the convex portion 81 having a pair of arc portions 82 can support the opposing portions of the pair of screws 50, so that even if a relatively large load (lateral force) is applied to the pair of screws 50, the pair of screws 50 can be prevented from approaching each other and interfering with each other.
  • the extruder 90 of the fifth embodiment differs from the extruder 10 of the first embodiment (see Fig. 4) only in that the rotation center c3 of the pair of screws 50 coincides with the center c2 of the pair of cylinders 21, 22 (the pair of large conveying paths TP2) when the kneading area AR2 (see Fig. 2) is viewed from the axial direction of the pair of screws 50.
  • the extruder 90 of embodiment 5 configured as described above can achieve substantially the same effects as the extruder 10 of embodiment 1 described above.
  • a relatively large clearance CL3 is formed around the entire circumference of the pair of screws 50 within the kneading region AR2, so that even if a relatively large load (lateral force) is applied to the pair of screws 50, the pair of screws 50 can be reliably prevented from interfering with the large conveying path TP2.
  • the extruder 100 of the sixth embodiment differs from the extruder 10 of the first embodiment (see FIG. 4 ) in that the lower clearance CL1 is reduced to almost zero as in the fourth embodiment (see FIG. 12 ), and that a lower straight portion (straight portion) 101 and an upper straight portion (straight portion) 102 are provided between a pair of adjacent cylinders 21, 22.
  • the lower straight section 101 is disposed on the lower wall 21a, 22a side
  • the upper straight section 102 is disposed on the upper wall 21b, 22b side.
  • the lower straight section 101 and the upper straight section 102 are straight sections that connect the arc-shaped inner wall W1 that forms one cylinder 21 and the arc-shaped inner wall W2 that forms the other cylinder 22 with tangents to each other, so that the cross-sectional shape of the pair of large conveying paths TP2 is a substantially oval shape, as shown in FIG. 14.
  • the extruder 100 of embodiment 6 configured as described above can achieve substantially the same effects as the extruder 10 of embodiment 1 described above.
  • the extruder 100 of embodiment 6 does not have a protrusion that protrudes toward the space between the pair of screws 50, the cross-sectional area inside the kneading region AR2 (the pair of large conveying paths TP2) can be made larger, and the residence time of the resin raw material (resin pellets PR, molten resin MR) can be made longer, thereby further increasing the processing capacity.
  • the extruder 110 of the seventh embodiment differs from the extruder 80 of the fourth embodiment (see Fig. 12) in that the pair of adjacent cylinders 21, 22 are provided with side wall portions 21c, 22c capable of supporting the opposite side (left and right sides in the figure) of the pair of screws 50. Also, the extruder 110 of the seventh embodiment differs in that the pair of screws 50 are moved toward the upper walls 21b, 22b by a distance t3 (t3>t2) and are shaped so that the pair of screws 50 can rotate relative to each other in that state.
  • the extruder 110 of embodiment 7 configured as described above can achieve substantially the same effects as the extruder 80 of embodiment 4 described above.
  • the pair of cylinders 21, 22 are provided with side wall portions 21c, 22c capable of supporting the side opposite the opposing side of adjacent screws 50, so that the pair of screws 50 can be prevented from swinging in the direction of approaching and separating from each other inside the pair of large conveying paths TP2.
  • the extruder 120 of embodiment 8 differs from the extruder 110 of embodiment 7 (see FIG. 15 ) in that an upper straight portion (straight portion) 102 is provided between a pair of adjacent cylinders 21, 22, similar to embodiment 6 (see FIG. 14 ).
  • the upper straight section 102 is provided on the upper walls 21b, 22b that form the pair of cylinders 21, 22, and is a straight section that connects the arc-shaped inner wall W1 that forms one cylinder 21 and the arc-shaped inner wall W2 that forms the other cylinder 22 with each other by a tangent.
  • the extruder 120 of embodiment 8 configured as described above can achieve substantially the same effects as the extruder 110 of embodiment 7 described above.
  • the convex portions of the upper walls 21b, 22b are eliminated and instead an upper straight portion 102 is provided, so that the cross-sectional area inside the kneading region AR2 (a pair of large conveying paths TP2) can be increased, the residence time of the resin raw material (resin pellets PR, molten resin MR) can be increased, and the processing capacity can be further increased.
  • the extruder 130 of the ninth embodiment differs from the extruder 120 of the eighth embodiment (see FIG. 16) only in that the convex portions 81 of the lower walls 21 a, 22 a are omitted and a lower straight portion 101 is provided similarly to the sixth embodiment (see FIG. 14).
  • the lower straight section 101 is provided on the lower walls 21a, 22a that form the pair of cylinders 21, 22, and is a straight section that connects the arc-shaped inner wall W1 that forms one cylinder 21 and the arc-shaped inner wall W2 that forms the other cylinder 22 with each other by a tangent.
  • the extruder 130 of embodiment 9 configured as described above can achieve substantially the same effects as the extruder 120 of embodiment 8 described above.
  • the convex portions of the lower walls 21a, 22a are eliminated and instead a lower straight portion 101 is provided, so that the cross-sectional area inside the kneading region AR2 (a pair of large conveying paths TP2) can be further increased, and the residence time of the resin raw material (resin pellets PR, molten resin MR) can be made longer, thereby increasing the processing capacity.
  • the extruder 140 of the tenth embodiment differs from the extruder 10 of the first embodiment (see Fig. 2) only in that the internal shape of the pair of cylinders 21, 22 is rectangular. Specifically, when the kneading area AR2 (the pair of large conveying paths TP2) is viewed from the axial direction of the pair of screws 50, the shape formed by butting the pair of large conveying paths TP2 inside the pair of cylinders 21, 22 is approximately rectangular. Note that a sufficient clearance is secured around the pair of screws 50.
  • the extruder 140 of embodiment 10 configured as described above can achieve substantially the same effects as the extruder 10 of embodiment 1 described above.
  • the pair of cylinders 21, 22 have a rectangular internal shape, so that the pair of cylinders 21, 22 can be easily formed by pressing thick steel plates, for example.
  • the extruder 150 of the eleventh embodiment differs from the extruder 140 of the tenth embodiment (see FIG. 18) in that arc-shaped connection portions 151, each having a predetermined radius, are integrally provided at the inner corners (four locations in total) of the pair of cylinders 21, 22.
  • the extruder 150 of embodiment 11 configured as described above can achieve substantially the same effects as the extruder 140 of embodiment 10 described above.
  • the arc-shaped connection parts 151 are integrally provided at the internal corners of the pair of cylinders 21, 22, respectively, so that the concentration of stress at the internal corners of the pair of cylinders 21, 22 is suppressed. Therefore, it is possible to effectively suppress the occurrence of cracks or the like at the internal corners of the pair of cylinders 21, 22.
  • the extruder 160 of the twelfth embodiment has a convex portion 81 that fits between a pair of adjacent screws 50 on the lower walls 21a, 22a that form the interiors of the pair of cylinders 21, 22 (the interiors of the pair of large conveying paths TP2).
  • the radial dimension of the pair of arcuate portions 82 that form the convex portion 81 is approximately the same as the radial dimension of the outer diameter of the screw 50.
  • the extruder 160 of embodiment 12 configured as described above can achieve substantially the same effects as the extruder 80 of embodiment 4 described above.
  • extruder 170 of embodiment 13 differs from extruder 160 of embodiment 12 (see FIG. 20 ) in that, like extruder 150 of embodiment 11 (FIG. 19 ), arc-shaped connection portions 171 with a predetermined radius are integrally provided at the inner corners of a pair of cylinders 21, 22.
  • the extruder 170 of embodiment 13 configured as described above can achieve substantially the same effects as the extruders 150 and 160 of embodiments 11 and 12 described above.
  • the extruder 180 of embodiment 14 differs from the extruder 90 of embodiment 5 (see FIG. 13) in that a rotational vibration suppression member 181 for suppressing rotational vibration of a pair of screws 50 is provided inside a pair of cylinders 21, 22 (a pair of large conveying paths TP2).
  • the rotational vibration suppression member 181 is provided inside the large block BL5, and is formed in a generally eyeglass shape when viewed from the axial direction of the pair of screws 50.
  • the outer peripheral portion of the rotational vibration suppression member 181 is fitted into the inner walls of the pair of cylinders 21, 22.
  • the rotational vibration suppression member 181 also has a certain degree of thickness, and the pair of screws 50 are freely rotatably arranged on the inner peripheral portion of the rotational vibration suppression member 181 with "approximately zero" clearance.
  • the extruder 180 of embodiment 14 configured as described above can achieve substantially the same effects as the extruder 90 of embodiment 5 described above.
  • the extruder 180 of embodiment 14 is provided with a rotational vibration suppression member 181 that suppresses rotational vibration of the pair of screws 50 located in the kneading area AR2 (see FIG. 2), and therefore can suppress deflection of the pair of screws 50 inside the pair of large conveying paths TP2. This can prevent the pair of screws 50 from interfering with each other or colliding with the pair of large conveying paths TP2.
  • rotational vibration suppression member 181 it is not limited to providing one rotational vibration suppression member 181 in the large block BL5, but additional rotational vibration suppression members 181 can also be provided in other large blocks. In this case, it is possible to suppress the occurrence of rotational vibration over almost the entire area of the pair of screws 50, and obtain stable rotation of the pair of screws 50.
  • the extruder 190 of the fifteenth embodiment differs from the extruder 180 of the fourteenth embodiment (see FIG. 22) in that a block-shaped rotational vibration suppression member 191 is sandwiched between the large block BL5 and the large block BL6.
  • the rotational vibration suppression member 191 is formed with a cross-sectional shape that is substantially the same as that of the pair of cylinders 21, 22 when viewed from the axial direction of the pair of screws 50.
  • the pair of screws 50 are arranged rotatably on the inner periphery of the rotational vibration suppression member 191 with a clearance of "substantially zero.”
  • the extruder 190 of embodiment 15 configured as described above can achieve substantially the same effects as the extruder 180 of embodiment 14 described above.
  • the extruder 190 of embodiment 15 can improve assembly workability by simply sandwiching the rotational runout suppression member 191 between adjacent large blocks BL5, BL6 when assembling the cylinder unit CU (see FIG. 2).
  • rotational vibration suppression member 191 it is not limited to providing one rotational vibration suppression member 191 between large blocks BL5 and BL6, but additional rotational vibration suppression members 191 can also be provided between the other large blocks.
  • the extruder 200 of the embodiment 16 has a substantially similar basic structure to the extruder 10 of the embodiment 1 (see Figs. 1 and 2), but has a different application.
  • the extruder 200 is an extruder used in a pyrolysis system, and has a function of pyrolyzing a resin raw material (polymer) PM inside a cylinder unit CU and separating it into a decomposition gas GS (solid line arrow in the figure) and a residue RS (dashed line arrow in the figure).
  • vent ports 201 are provided on the outer periphery of the cylinder unit CU, and these vent ports 201 collect the decomposition gas GS. Then, by operation of a vacuum pump 202, the decomposition gas GS enters a residue tank 204 from the vent ports 201 through a gas pipe 203. Thereafter, the decomposition gas GS inside the residue tank 204 is cooled and becomes liquid monomer (not shown), which is stored in a monomer tank 205.
  • a residue tank 204 is connected to the upstream side (left side in the figure) of the monomer tank 205, and a vacuum pump 202 is connected to the downstream side (right side in the figure) of the monomer tank 205.
  • an extraction cock 206 is provided on the lower side of the monomer tank 205, and the liquid monomer stored in the monomer tank 205 can be extracted from the extraction cock 206.
  • the residue RS (solid line arrow in the figure) that is melted and kneaded inside the cylinder unit CU enters the residue tank 204 through the residue discharge port (discharge port) 207 provided in the small block BL9 (a pair of cylinders 21, 22). That is, the residue discharge port 207 for discharging the residue RS after thermal decomposition is connected to the kneading area AR2 through the metering area AR3 and the discharge area AR4.
  • the residue discharge port 207 has the function of discharging the residue RS generated after thermal decomposition of the resin raw material (polymer) PM to the outside of the pair of cylinders 21, 22.
  • the residue RS is a softened solid, and is stored on the lower side of the residue tank 204.
  • the extruder 200 of embodiment 16 configured as described above can achieve substantially the same effects as the extruder 10 of embodiment 1 described above. That is, the residence time of the resin raw material (polymer) PM inside the cylinder unit CU can be extended, allowing for sufficient thermal decomposition, and thus improving the processing capacity.
  • the extruder 210 of the seventeenth embodiment differs from the extruder 90 of the fifth embodiment (see FIG. 13) only in that, when the kneading region AR2 (see FIG. 2) is viewed from the axial direction of the pair of screws 50, the distance L1 between the centers c2 of the large conveying path TP2 is made larger than the distance L between the rotation centers c3 of the pair of screws 50 (L1>L). As a result, the upper convex portion 211 and the lower convex portion 212 are inserted between the adjacent pairs of screws 50.
  • the extruder 210 of embodiment 17 configured as described above can achieve substantially the same effects as the extruder 90 of embodiment 5 described above.
  • the upper convex portion 211 and the lower convex portion 212 each fit between a pair of adjacent screws 50, so that the pair of screws 50 can be prevented from approaching each other and interfering with each other.
  • the extruder 220 of the embodiment 18 is different from the extruder 210 of the embodiment 17 (see Fig. 25) in that, when the kneading area AR2 (see Fig. 2) is viewed from the axial direction of the pair of screws 50, the pair of cylinders 21, 22 have semicircular internal cross-sectional shapes that are butted against each other, and the centers c2 of the respective large conveying paths TP2 are common points.
  • the diameter dimension d4 of the pair of large conveying paths TP2 is made larger than that of the extruder 210 of the embodiment 17 (d4>d2) so that the pair of screws 50 (outer diameter dimension d3) can be accommodated inside.
  • the extruder 220 of embodiment 18 configured as described above can achieve substantially the same effects as the extruder 210 of embodiment 17 described above.
  • the pair of large conveying paths TP2 are formed by butting semicircular shapes together to form a circular cross section, so that the shape of the pair of cylinders 21, 22 can be simplified, and thus the extruder 220 can be easily manufactured.
  • the extruder 230 of the embodiment 19 is different from the extruder 220 of the embodiment 18 (see Fig. 26) in that the diameter dimension d5 of the pair of large conveying paths TP2 is larger (d5>d4, d5 ⁇ 4.5 ⁇ d3) when the kneading area AR2 (see Fig. 2) is viewed from the axial direction of the pair of screws 50.
  • the extruder 230 of the embodiment 19 is different in that the rotation center c3 of the pair of screws 50 is offset by a distance t4 (t4>d3) from the center c2 of the pair of large conveying paths TP2 toward the lower walls 21a, 22a of the pair of cylinders 21, 22.
  • the extruder 230 of embodiment 19 configured as described above can achieve substantially the same effects as the extruder 220 of embodiment 18 described above.
  • the extruder 230 of embodiment 19 can prevent the resin raw material (resin pellets PR, molten resin MR) from remaining on the lower side of the large conveying path TP2 in the gravity direction for a long period of time.
  • each component in each of the above-mentioned embodiments is arbitrary as long as they can achieve the present invention, and are not limited to the above-mentioned embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
PCT/JP2022/043553 2022-11-25 2022-11-25 押出機 Ceased WO2024111114A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202280101928.1A CN120225335A (zh) 2022-11-25 2022-11-25 挤出机
PCT/JP2022/043553 WO2024111114A1 (ja) 2022-11-25 2022-11-25 押出機
JP2024559822A JPWO2024111114A1 (https=) 2022-11-25 2022-11-25
EP22966523.7A EP4606555A1 (en) 2022-11-25 2022-11-25 Extruder
TW112126157A TW202421403A (zh) 2022-11-25 2023-07-13 擠出機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/043553 WO2024111114A1 (ja) 2022-11-25 2022-11-25 押出機

Publications (1)

Publication Number Publication Date
WO2024111114A1 true WO2024111114A1 (ja) 2024-05-30

Family

ID=91195838

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/043553 Ceased WO2024111114A1 (ja) 2022-11-25 2022-11-25 押出機

Country Status (5)

Country Link
EP (1) EP4606555A1 (https=)
JP (1) JPWO2024111114A1 (https=)
CN (1) CN120225335A (https=)
TW (1) TW202421403A (https=)
WO (1) WO2024111114A1 (https=)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5964340A (ja) * 1982-08-26 1984-04-12 ヘルマン・ベルシユトルフ・マシイネンバウ・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング ベント式押出し機
JPS63144031A (ja) * 1986-12-05 1988-06-16 Ishikawajima Harima Heavy Ind Co Ltd 押出機
JP2001058347A (ja) * 1999-06-14 2001-03-06 Hoshi Plastic:Kk 樹脂押出機用スクリューおよび樹脂押出機
CN200945700Y (zh) * 2006-08-11 2007-09-12 乌鲁木齐德美隆塑化有限公司 二阶式单螺杆微发泡挤出机
JP2011020307A (ja) * 2009-07-14 2011-02-03 Asahi Kasei Chemicals Corp ポリオキシメチレン樹脂組成物の製造方法
JP2011235482A (ja) * 2010-05-07 2011-11-24 Kobe Steel Ltd 混練設備
JP2014008677A (ja) * 2012-06-29 2014-01-20 Japan Steel Works Ltd:The 二軸スクリュ押出機
JP2016087896A (ja) 2014-10-31 2016-05-23 株式会社日本製鋼所 繊維強化樹脂組成物の製造に使用する二軸押出機

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0540994Y2 (https=) * 1988-11-28 1993-10-18
JPH0397519A (ja) * 1989-09-12 1991-04-23 Mitsubishi Heavy Ind Ltd 樹脂圧力調整装置
JP5617770B2 (ja) * 2011-06-14 2014-11-05 日立金属株式会社 高分子化合物の処理方法及び装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5964340A (ja) * 1982-08-26 1984-04-12 ヘルマン・ベルシユトルフ・マシイネンバウ・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング ベント式押出し機
JPS63144031A (ja) * 1986-12-05 1988-06-16 Ishikawajima Harima Heavy Ind Co Ltd 押出機
JP2001058347A (ja) * 1999-06-14 2001-03-06 Hoshi Plastic:Kk 樹脂押出機用スクリューおよび樹脂押出機
CN200945700Y (zh) * 2006-08-11 2007-09-12 乌鲁木齐德美隆塑化有限公司 二阶式单螺杆微发泡挤出机
JP2011020307A (ja) * 2009-07-14 2011-02-03 Asahi Kasei Chemicals Corp ポリオキシメチレン樹脂組成物の製造方法
JP2011235482A (ja) * 2010-05-07 2011-11-24 Kobe Steel Ltd 混練設備
JP2014008677A (ja) * 2012-06-29 2014-01-20 Japan Steel Works Ltd:The 二軸スクリュ押出機
JP2016087896A (ja) 2014-10-31 2016-05-23 株式会社日本製鋼所 繊維強化樹脂組成物の製造に使用する二軸押出機

Also Published As

Publication number Publication date
JPWO2024111114A1 (https=) 2024-05-30
TW202421403A (zh) 2024-06-01
EP4606555A1 (en) 2025-08-27
CN120225335A (zh) 2025-06-27

Similar Documents

Publication Publication Date Title
US11400632B2 (en) Extruder screw with conveying portions and barrier portions and extrusion methods using the extruder screw and a plurality of barrel blocks
JPH04276407A (ja) 自動車タイヤ、駆動ベルト、コンベヤベルト並びに工業ゴム製品のためのゴム基礎混合物とゴム仕上げ混合物を１台の混合装置で１段階的にかつ連続的に製造するための方法と装置
US20040094862A1 (en) Multi-screw extruder and method for treating and/or processing elastomers with added filler
US20210362374A1 (en) Method of kneading and kneaded material
US20190352472A1 (en) Production method for conductive composite material
US8753003B2 (en) Screw feed elements for extrusion of viscoelastic masses
TWI794306B (zh) 用於攪拌及搓揉機之雙葉式蝸桿軸、用於此蝸桿軸的區段、容納此蝸桿軸的殼體以及相應的攪拌及搓揉機
TWI852776B (zh) 螺旋機及混練方法
WO2024111114A1 (ja) 押出機
WO2012165469A1 (ja) 材料混練装置及び材料混練方法
US12459185B2 (en) Screw machine with a rotatable filter in a deaeration port
JP4781724B2 (ja) 連続混練装置及び該装置を有する混練システム
JP7380007B2 (ja) 搬送装置、及び混練機
JP2023097743A (ja) 溶融混練押出装置の運転の際に必要なエネルギーを低減可能とする方法
JP3428991B2 (ja) 素材搬送・混合・練成装置
TWI797886B (zh) 螺旋機
CN105980121A (zh) 连续混炼装置
JP7851492B2 (ja) 押出機
US20240416571A1 (en) Connecting tube assembly for an extruder
CN113927864B (zh) 管材挤出成型设备
TWI897353B (zh) 廢棄物混煉加工處理設備
WO2024236724A1 (ja) 押出機
JP3738422B2 (ja) 造粒用混練押出機
CN121375095B (zh) 一种抗菌母粒均匀共混的共挤膜生产设备
JP7427329B2 (ja) 成形機用冷却装置及び成形機

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22966523

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2024559822

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 202517046070

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 202280101928.1

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2022966523

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2022966523

Country of ref document: EP

Effective date: 20250520

WWP Wipo information: published in national office

Ref document number: 202517046070

Country of ref document: IN

NENP Non-entry into the national phase

Ref country code: DE

WWP Wipo information: published in national office

Ref document number: 202280101928.1

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 2022966523

Country of ref document: EP