WO2011144814A1 - Method and apparatus for processing plastic materials - Google Patents

Method and apparatus for processing plastic materials Download PDF

Info

Publication number
WO2011144814A1
WO2011144814A1 PCT/FI2011/050454 FI2011050454W WO2011144814A1 WO 2011144814 A1 WO2011144814 A1 WO 2011144814A1 FI 2011050454 W FI2011050454 W FI 2011050454W WO 2011144814 A1 WO2011144814 A1 WO 2011144814A1
Authority
WO
WIPO (PCT)
Prior art keywords
feed
extruder
plastic
screw
sleeve
Prior art date
Application number
PCT/FI2011/050454
Other languages
English (en)
French (fr)
Inventor
Tuomo Takku
Original Assignee
Oy Kwh Pipe Ab
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 Oy Kwh Pipe Ab filed Critical Oy Kwh Pipe Ab
Priority to EA201291062A priority Critical patent/EA201291062A1/ru
Priority to EP11730033A priority patent/EP2571669A1/en
Publication of WO2011144814A1 publication Critical patent/WO2011144814A1/en

Links

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
    • B29C48/361—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die with the barrel or with a part thereof rotating
    • 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
    • B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing 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
    • 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
    • B29C48/397—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 a single screw
    • 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
    • B29C48/445—Coaxially arranged screws, i.e. one within the other
    • 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
    • B29C48/501—Extruder feed section

Definitions

  • the invention also relates to an apparatus, according to the preamble of Claim 6, for processing molten plastic.
  • thermoplastic refers principally to thermoplastics, which can be repeatedly melted and shaped with the aid of heat and pressure.
  • Typical thermoplastics are polyolefins, such as polyethylene and polypropylene, as well as polyamide, polyacetal, and poly(ethylene terephthalate). These polymers are partly crystalline.
  • Amorphous thermoplastics are, for example, polycarbonate, acrylonitrile/butadiene/styrene, poly( vinyl chloride), polystyrene, and poly(methyl methacrylate).
  • the present invention is intended to eliminate at least some of the problems relating to the prior art and to create a new type of solution for processing plastic in an extruder.
  • the device according to the invention is characterized by what is stated in the characterizing part of Claim 6.
  • an additional feed zone is formed in the screw and feed sleeve, with the aid of which an even and adjustable raw-material flow can be produced.
  • a single-screw extruder's melting power and the properties of the molten plastic are set by the geometry of the screw's feed zone. These define the screw's revolution output, which has a great effect on the molten plastic's temperature. The melt temperature often determines the production line's output. These properties can be dimensioned to suit each raw material.
  • Figure 1 presents a partial cross-section of one embodiment of the extruder according to the invention
  • Figure 3 presents the cylindrical portion of the sleeve, when spread open.
  • the plastic raw material usually plastic pellets or nurdles
  • the feed device then forms an additional feed zone in the extruder.
  • additional feed zone refers to a zone that is arranged before the actual, i.e. traditional, feed zone. In the additional feed zone, an even flow of nurdles is created, in the traditional feed zone, the plastic is melted and homogenized through the combined effect of the pressure, the heat of the cylinder, and the power transmitted by the motor to the screw.
  • the surface of the feed device receiving the raw material mainly comprises the shaft of the extruder, in which grooves have been formed.
  • This grooved portion of the shaft is surrounded by a generally cylindrical sleeve, thus forming an annular feed channel between the grooved feed surface and the inner surface of the sleeve surrounding it.
  • the example described below is of a generally cylindrical sleeve, in which the tool-side edge (i.e. the front edge) is cut at a slant, so that this edge will act as a guide pushing the plastic raw material during feeding.
  • the tool-side edge i.e. the front edge
  • the sleeve 9 can be rotated around its longitudinal axis by a worm 10, either manually or by a motor, thus adjusting the flow of material.
  • the jacket is equipped with a cooling channel 11.
  • the sleeve can be rotated around its axis.
  • the outer cylindrical surface of the sleeve covers part of the feed opening.
  • the sleeve's cylindrical surface is about half-way, i.e. 50 % of the feed opening is closed.
  • the adjustable sleeve is then in the "central position".

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
PCT/FI2011/050454 2010-05-18 2011-05-18 Method and apparatus for processing plastic materials WO2011144814A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EA201291062A EA201291062A1 (ru) 2010-05-18 2011-05-18 Способ и устройство для обработки пластмасс
EP11730033A EP2571669A1 (en) 2010-05-18 2011-05-18 Method and apparatus for processing plastic materials

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20105538A FI20105538A (sv) 2010-05-18 2010-05-18 Förfarande och anordning för bearbetning av plast
FI20105538 2010-05-18

Publications (1)

Publication Number Publication Date
WO2011144814A1 true WO2011144814A1 (en) 2011-11-24

Family

ID=42234321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2011/050454 WO2011144814A1 (en) 2010-05-18 2011-05-18 Method and apparatus for processing plastic materials

Country Status (4)

Country Link
EP (1) EP2571669A1 (sv)
EA (1) EA201291062A1 (sv)
FI (1) FI20105538A (sv)
WO (1) WO2011144814A1 (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10479008B2 (en) 2013-12-02 2019-11-19 Subsea 7 Limited Apparatus and techniques for coating pipeline field joints

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731247A (en) * 1953-04-11 1956-01-17 Rhodiaceta Apparatus for malaxing and mixing
US3300811A (en) 1964-09-03 1967-01-31 Loire Atel Forges Plastic extruding machines
US3452965A (en) * 1963-11-23 1969-07-01 Bayer Ag Mixing apparatus having concentric worm members
US3863905A (en) * 1972-04-10 1975-02-04 Bryce Maxwell Apparatus and method for processing plastic material
EP0071159A1 (de) 1981-07-31 1983-02-09 Windmöller & Hölscher Trichterstück einer Einschneckenstrangpresse
GB2301795A (en) * 1995-06-07 1996-12-18 Trim Masters Int Ltd Polymer extruder feed with wiping action

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731247A (en) * 1953-04-11 1956-01-17 Rhodiaceta Apparatus for malaxing and mixing
US3452965A (en) * 1963-11-23 1969-07-01 Bayer Ag Mixing apparatus having concentric worm members
US3300811A (en) 1964-09-03 1967-01-31 Loire Atel Forges Plastic extruding machines
US3863905A (en) * 1972-04-10 1975-02-04 Bryce Maxwell Apparatus and method for processing plastic material
EP0071159A1 (de) 1981-07-31 1983-02-09 Windmöller & Hölscher Trichterstück einer Einschneckenstrangpresse
GB2301795A (en) * 1995-06-07 1996-12-18 Trim Masters Int Ltd Polymer extruder feed with wiping action

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10479008B2 (en) 2013-12-02 2019-11-19 Subsea 7 Limited Apparatus and techniques for coating pipeline field joints

Also Published As

Publication number Publication date
FI20105538A (sv) 2011-11-19
FI20105538A0 (sv) 2010-05-18
EP2571669A1 (en) 2013-03-27
EA201291062A1 (ru) 2013-04-30

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