DE856510C - Strangpresse fuer plastische Massen - Google Patents

Strangpresse fuer plastische Massen

Info

Publication number
DE856510C
DE856510C DED5928D DED0005928D DE856510C DE 856510 C DE856510 C DE 856510C DE D5928 D DED5928 D DE D5928D DE D0005928 D DED0005928 D DE D0005928D DE 856510 C DE856510 C DE 856510C
Authority
DE
Germany
Prior art keywords
screw
extrusion press
plastic masses
bearing
grooves
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.)
Expired
Application number
DED5928D
Other languages
English (en)
Inventor
Heinrich Steinmann
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Priority to DED5928D priority Critical patent/DE856510C/de
Application granted granted Critical
Publication of DE856510C publication Critical patent/DE856510C/de
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B29B7/484—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 with two shafts provided with screws, e.g. one screw being shorter than 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
    • 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
    • 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
    • B29C48/395—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
    • B29C48/41—Intermeshing counter-rotating 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
    • B29C48/505—Screws
    • B29C48/535—Screws with thread pitch varying along the longitudinal axis
    • 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
    • B29C48/03—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
    • B29C48/05—Filamentary, e.g. strands
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Screw Conveyors (AREA)
  • Sliding-Contact Bearings (AREA)

Description

  • Bekanntlich ist bei den sogenannten Schnecke pressen, die als Transport-, Knet- und Plastifizierungsorgan wirkende Schnecke nur einseitig an der Eintrittsseite gelagert. Diese Lagerung hat ein Unrundlaufen bzw. Schlagen der Schnecke zur Folge, denn eine zuverlässige, reibungsmindernde Lagerung ist nur dort vorhanden, wo das zu behandelnde Material in den Arbeitszylinder einfließt, während an alle übrigen Stellen der seitliche Druck meist durch Berührung der Außenflächen ihrer Gänge mit der Zylinderinnenwandung aufgenommen wird. Bei langen Schnecken wird sich dieser Umstand besonders unangenehm bemerkbar machen und die schon durch den normalen Arbeitsgang auftretenden, an sich beträchtlichen Reibungsstoffe noch um ein zusätzliches vermehren, wodurch wieder eine höhere Antriebskraft für die Maschine erforderlich wird.
  • Man hat bereits vorgeschlagen, am Austrittsende der Schnecke eine zweite Lagerung vorzusehen, die darin bestand, daß die Schnecke am Austrittsende abgesetzt war und das Lager selbst durch Kugeln oder Rollen gebildet wurde. Diese Art der Lagerung hat aber den Nachteil, daß zwischen Schneckenzapfen und Lagerinnenfläche nur eine punkt- bzw. linienförmige Berührung stattfindet, was zu raschem Verschleiß bzw. Pressen fühlen kann, weil sich Rollen und Kugeln infolge des durchgepreßten Kunststoffes nicht drehen werden, eine tSlschmierung aber nicht statthaft ist.
  • Diese Nachteile werden gemäß der Erfindung dadurch vermieden, daß das Lager der Austrittsseite mit axial verlaufenden Ausnehmungen, wie z. B.
  • Rillen, versehen ist. Durch diese Maßnahme wird einerseits das radiale Spiel der Preßschnecke gegenüber dem Zylindergehäuse eingehalten und andererseits auch dem plastifizierten Material die Möglichkeit gegeben, zwischen Welle und Lagerung durch die Ausnehmungen des zweiten Lagers auszutreten.
  • Diese Ausnehmungen bestehen zweckmäßig aus axial verlaufenden, halbkreisförmigen Profilrillen, die in gleichmäßigen Abständen in der Gleitfläche des Lagers angeordnet sind. Der zwischen den einzelnen Rillen verbleibende Zwischenraum ergibt eine ausreichende Lagerfläche, die trotz der entfallenden Schmiermöglichkeit eine längere Lebensdauer gewährleistet. Die axial verlaufenden Rillen bewirken einen zügigen Auslauf des plastifizierten Materials. Ferner erlaubt diese Art der Lagerung die Einhaltung des Spiels zwischen Preßschnecke und Zylinderinnenwandung.
  • In der Zeichnung ist ein Ausführungsbeispiel gemäß der Erfindung veranschaulicht, und zwar zeigt Abb. I einen Längsschnitt durch die Schnecke und Abb. 2 einen Schnitt nach der Linie A-A der Abb. I.
  • Hierbei bedeutet a das Schneckengehäuse, b die beiden Schnecken, c die zusätzlichen Lager, d die axialen Rillen.

Claims (1)

  1. PATENTANSPRUCH Strangpresse mit Preßschnecke für plastische Massen, bei der die Schnecke am Eintritts- und am Austrittsende des Schneckengehäuses gelagert ist, dadurch gekennzeichnet, daß das am Austrittsende liegende Lager mit axial verlaufenden Ausnehmungen, wie z. B. Rillen versehen ist.
    Angezogene Druckschriften: Schweizerische Patentschrift Nr. 219 728.
DED5928D 1944-06-03 1944-06-03 Strangpresse fuer plastische Massen Expired DE856510C (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED5928D DE856510C (de) 1944-06-03 1944-06-03 Strangpresse fuer plastische Massen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED5928D DE856510C (de) 1944-06-03 1944-06-03 Strangpresse fuer plastische Massen

Publications (1)

Publication Number Publication Date
DE856510C true DE856510C (de) 1952-11-20

Family

ID=7031627

Family Applications (1)

Application Number Title Priority Date Filing Date
DED5928D Expired DE856510C (de) 1944-06-03 1944-06-03 Strangpresse fuer plastische Massen

Country Status (1)

Country Link
DE (1) DE856510C (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE935634C (de) * 1953-07-30 1955-11-24 Eck & Soehne Joseph Kontinuierlich arbeitende Schneckenpresse fuer plastische Massen
DE1011140B (de) * 1953-12-11 1957-06-27 Firestone Tire & Rubber Co Schneckenpresse zur Verarbeitung von formbarem, insbesondere kautschukhaltigem Material
FR2333636A1 (fr) * 1975-12-05 1977-07-01 Bayer Ag Dispositif pour l'extrusion en semi-produits de matieres thermoplastiques sensibles a la chaleur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH219728A (de) * 1940-07-20 1942-02-28 Aug Nowack Ag Verfahren zur Herstellung von Pressmischungen aus härtbaren Harzen.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH219728A (de) * 1940-07-20 1942-02-28 Aug Nowack Ag Verfahren zur Herstellung von Pressmischungen aus härtbaren Harzen.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE935634C (de) * 1953-07-30 1955-11-24 Eck & Soehne Joseph Kontinuierlich arbeitende Schneckenpresse fuer plastische Massen
DE1011140B (de) * 1953-12-11 1957-06-27 Firestone Tire & Rubber Co Schneckenpresse zur Verarbeitung von formbarem, insbesondere kautschukhaltigem Material
FR2333636A1 (fr) * 1975-12-05 1977-07-01 Bayer Ag Dispositif pour l'extrusion en semi-produits de matieres thermoplastiques sensibles a la chaleur

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