WO2007135025A1 - Extrudeuse à vitesse de transport variable - Google Patents

Extrudeuse à vitesse de transport variable Download PDF

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Publication number
WO2007135025A1
WO2007135025A1 PCT/EP2007/054701 EP2007054701W WO2007135025A1 WO 2007135025 A1 WO2007135025 A1 WO 2007135025A1 EP 2007054701 W EP2007054701 W EP 2007054701W WO 2007135025 A1 WO2007135025 A1 WO 2007135025A1
Authority
WO
WIPO (PCT)
Prior art keywords
extruder
cylinder
bushing
grooved
barrel
Prior art date
Application number
PCT/EP2007/054701
Other languages
German (de)
English (en)
Inventor
Jürgen Linkies
Original Assignee
Windmöller & Hölscher Kg
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 Windmöller & Hölscher Kg filed Critical Windmöller & Hölscher Kg
Publication of WO2007135025A1 publication Critical patent/WO2007135025A1/fr

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
    • B29C48/78—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
    • 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
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • 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
    • B29C48/04—Particle-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
    • B29C48/25—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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • 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
    • B29C48/78—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

Definitions

  • the invention relates to a grooved bushing extruder for melting plastics with an extruder cylinder, in which at least one motor-rotatable screw conveyor is arranged, wherein the extruder cylinder has a feed zone in which a cylinder jacket is perforated at least one openable top opening and in the at least one Part of an inner circumferential surface of the extruder barrel is profiled.
  • extruders For melting plastics, extruders are used which essentially comprise a heatable cylinder and a screw rotating therein. In a feed zone at the beginning of the cylinder plastic, in particular in granular form, is drawn into the cylinder, where it melts to a plastic mass due to the external heat and due to the shearing caused by the screw to a plastic mass. In conventional extruders, the achievable mass throughput is dependent on the back pressure at the front mouth of the extruder.
  • Both parts are to be driven separately, so that the speed of the
  • Feeding screw is independent of the speed of the main screw regulated.
  • the residence time in the range of the intake bushing can be varied and an adaptation to different types of plastic to be processed without mechanical modification of the extruder be made.
  • the auger is hollow drilled, wherein in the inner bore
  • the object of the invention is therefore to improve an extruder of the type mentioned so that the delivery rate can be varied at least in the region of the intake zone without structural changes.
  • the screw remains in one piece and can thus be formed both by the dimensioning as the profiling in a conventional manner.
  • the delivery rate can be influenced by the relative rotational speed of the grooved bush to the screw.
  • an extruder according to the invention can be used flexibly.
  • extruders required for the individual layers can thus be designed substantially identical. Spare parts or replacement machines only have to be kept ready for a universal extruder type in the coextrusion line.
  • the behavior of the extruder according to the invention corresponds to that of a known grooved-bushing extruder with a constant delivery rate.
  • the extruder according to the invention behaves like a smooth-tube extruder and is therefore particularly suitable for the processing of polyamides (PA) and ethylene-vinyl alcohol copolymers (EVOH).
  • PA polyamides
  • EVOH ethylene-vinyl alcohol copolymers
  • the relative speed between bush and screw and thus the delivery rate are increased, so that in particular LLDPE or metallocene polyethylenes (mPE) are to be processed with low melting temperatures.
  • a stationary diaphragm element which encloses the outer peripheral surface of the rotating grooved bushing is advantageous.
  • An aperture is provided on the baffle element which is aligned with the top of the extruder.
  • the Nutbuchsenzylinder itself has one or more openings. Runs the Nutbuchse, so the granules passes through the recess in the panel element up to the Nutbuchsenzylinder. In the moment in which one of the intake openings of the Nutbuchsenzylinders lies below the diaphragm recess, granules slip into the Nutbuchse and is plasticized there. Since the Nutbuchsenzylinder is completely covered by the diaphragm element up to the area of the aperture, trickling out of granules from the Nutbuchsenzylinder is prevented.
  • Master cylinder and feed cylinder are arranged stationary in this embodiment and include in their midst the rotatable Nutbuchsenzylinder a.
  • Figure 1 shows an extruder 100 according to the invention in a side, partially sectioned view
  • FIG. 2 shows an enlarged detail from FIG. 1.
  • the extruder 100 is composed essentially of a master cylinder 10 and a subsequent, rotatable Nutbuchsenzylinder 20 together.
  • a rotatable worm 12 is arranged, which is driven via an intermediate gear 15 by an electric motor 16.
  • Heating elements 11 heat the cylinder wall of the master cylinder 10.
  • an additional feed cylinder 13 is provided which is fixedly connected to the housing of the intermediate gear 15. It has an upwardly open filling opening 14 below the mouth of a hopper 14th
  • the inner circumferential surface of the Nutbuchsenzylinders 20 is provided with a profiling 21.
  • Both the master cylinder 10 as well as the feed cylinder 13 are provided at their respective Nutbuchsenzylinder cylinder 20 facing surface with sealing surfaces. In addition paragraphs are provided on these surfaces, are mounted on soft ball bearings 22, on which in turn the Nutbuchse 20 is rotatably mounted.
  • Nutbuchsenzylinder 20 To drive the Nutbuchsenzylinder 20 is provided with an outer toothing 27, in which a gear 26 engages.
  • the gear 2 6 is driven by an electric motor 25 at a variable speed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne une extrudeuse à douille rainurée (100) pour la fusion de matières plastiques avec un cylindre d'extrusion, dans lequel est disposé au moins une vis sans fin de transport (12) pouvant être entraînée en rotation par un moteur, le cylindre d'extrusion présentant une zone d'entrée dans laquelle est profilée au moins une partie d'une surface d'enveloppe intérieure du cylindre d'extrusion. Le cylindre d'extrusion est divisé en un cylindre principal (10) et un cylindre à douille rainurée (20) formant la zone d'entrée et aligné avec le premier, le cylindre à douille rainurée pouvant tourner autour d'un axe médian du cylindre par rapport au cylindre principal (10).
PCT/EP2007/054701 2006-05-20 2007-05-15 Extrudeuse à vitesse de transport variable WO2007135025A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006023835.4 2006-05-20
DE102006023835A DE102006023835A1 (de) 2006-05-20 2006-05-20 Extruder mit variabler Förderrate

Publications (1)

Publication Number Publication Date
WO2007135025A1 true WO2007135025A1 (fr) 2007-11-29

Family

ID=38565976

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/054701 WO2007135025A1 (fr) 2006-05-20 2007-05-15 Extrudeuse à vitesse de transport variable

Country Status (2)

Country Link
DE (1) DE102006023835A1 (fr)
WO (1) WO2007135025A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB685364A (en) * 1948-12-23 1953-01-07 David Bridge & Company Ltd Improvements in or relating to plastic extruding machines or appliances
FR1454023A (fr) * 1965-08-18 1966-07-22 Boudineuse à vis
JPS5532630A (en) * 1978-08-30 1980-03-07 Ishikawajima Harima Heavy Ind Co Ltd Plastic forming extruding machine
DE3130417A1 (de) * 1981-07-31 1983-02-10 Windmöller & Hölscher, 4540 Lengerich Trichterstueck einer einschneckenstrangpresse
JPS61235125A (ja) * 1985-04-12 1986-10-20 Mitsubishi Heavy Ind Ltd 押出機

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2910041C2 (de) * 1979-03-14 1982-10-21 Vjačeslav Vasil'evič Šaronov Schneckenpresse zur Verarbeitung von polymeren Materialien

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB685364A (en) * 1948-12-23 1953-01-07 David Bridge & Company Ltd Improvements in or relating to plastic extruding machines or appliances
FR1454023A (fr) * 1965-08-18 1966-07-22 Boudineuse à vis
JPS5532630A (en) * 1978-08-30 1980-03-07 Ishikawajima Harima Heavy Ind Co Ltd Plastic forming extruding machine
DE3130417A1 (de) * 1981-07-31 1983-02-10 Windmöller & Hölscher, 4540 Lengerich Trichterstueck einer einschneckenstrangpresse
JPS61235125A (ja) * 1985-04-12 1986-10-20 Mitsubishi Heavy Ind Ltd 押出機

Also Published As

Publication number Publication date
DE102006023835A1 (de) 2007-11-22

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