DE2650248A1 - Double screw extruder with additional mixer stage - esp. rotor, in extension of extruder barrel to improve homogeneity - Google Patents

Double screw extruder with additional mixer stage - esp. rotor, in extension of extruder barrel to improve homogeneity

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Publication number
DE2650248A1
DE2650248A1 DE19762650248 DE2650248A DE2650248A1 DE 2650248 A1 DE2650248 A1 DE 2650248A1 DE 19762650248 DE19762650248 DE 19762650248 DE 2650248 A DE2650248 A DE 2650248A DE 2650248 A1 DE2650248 A1 DE 2650248A1
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DE
Germany
Prior art keywords
mixer
screw extruder
extruder
housing
extension
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.)
Granted
Application number
DE19762650248
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German (de)
Other versions
DE2650248C2 (en
Inventor
Heinz Dipl Ing Weber
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Individual
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Individual
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Priority to DE2650248A priority Critical patent/DE2650248C2/en
Publication of DE2650248A1 publication Critical patent/DE2650248A1/en
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Publication of DE2650248C2 publication Critical patent/DE2650248C2/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—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
    • 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
    • B29B7/482—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 provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs
    • B29B7/483—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 provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs the other mixing parts being discs perpendicular to the screw axis
    • 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
    • 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
    • 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
    • B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
    • 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
    • B29C48/565—Screws having projections other than the thread, e.g. pins
    • 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
    • B29B7/486—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 screws surrounded by a casing provided with grooves or cavities
    • 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

Abstract

Homogenisation of plasticised plastics material in a double-screw extruder is effected by subjecting the materials, after leaving the metering zone to a thorough mixing and additional fine plasticising stage. A considerably greater degree of uniformity is achieved. The irregularities frequently encountered in products such as pipes, made from the material are largely eliminated. In addn. the strength is more uniform.

Description

"Verfahren und Doppelschneckenextruder zum Homo- "Process and twin screw extruder for homo-

genisieren von plastifiziertem Kunststoff" An Doppelschneckenmaschinen weist das plastifizierte Extrudat zuweilen erhebliche Unterschiede im Grad der Plastifizierung auf. Dies zeigt sich beispielsweise in Unebenheiten der Innenfläche von Rohren. Außerdem können die Festigkeitswerte sehr verschieden sein. Generation of plasticized plastic "On twin screw machines the plasticized extrudate sometimes shows considerable differences in the degree of plasticization on. This can be seen, for example, in unevenness in the inner surface of pipes. In addition, the strength values can be very different.

Der Erfindung liegt die Aufgabe zugrunde, einen Weg aufzuzeigen, der die angegebenen Mängel zumindest weitgehend behebt.The invention is based on the object of showing a way that at least largely remedies the specified deficiencies.

Demgemäß besteht die Erfindung in einem Verfahren zum Homoge nisieren von plastifiziertem Kunststoff an Doppelschneckenex trudern, welches Verfahren sich dadurch auszeichnet, daß der von den Schnecken geförderte und plastifizierte Kunststoff vor Austritt aus der Düse anschließend an die übliche Meteringzone einer Durchmischung und damit verbundener zusätzlicher Feinplastifizierung unterworfen wird.Accordingly, the invention resides in a method of homogenizing of plasticized plastic on twin screw extruder, which process is characterized by the fact that the plastic conveyed and plasticized by the screws before exiting the nozzle, following the usual metering zone of a mixing and is subjected to additional fine plasticization associated therewith.

Die Erfindung besteht ferner an einem Doppelschneckenextrader zur Durchführung des Verfahrens darin, daß in den Lauf des Kunststoff-Materialstromes von den Schnecken zur dose wenigstens ein Mischer eingebaut ist.The invention also consists of a twin screw extruder for Implementation of the method in that in the course of the plastic material flow At least one mixer is installed from the screws to the can.

Von Vorteil ist es dabei, wenn der Mischer nach Ärt eines Rührwerkmischers mit Nasen tragender Wehre und mit einem Gegenna sen aufweisenden Gehäuse ausgebildet ist, wobei die Nasen und Gegennasen miteinander zusammenwirken.It is advantageous if the mixer has the type of an agitator mixer formed with noses bearing weirs and with a case having Gegenna sen is, wherein the noses and counter-noses cooperate with one another.

In konstruktiver Hinsicht wird eine besonders günstige Lösung erhalten, wenn die Mischerwelle fest mit der Schnecke serbunden ist und wenn das Mischergehäuse mittels einer Verlängerung des Extrudergehäuses gebildet wird.In terms of construction, a particularly favorable solution is obtained, when the mixer shaft is firmly anchored to the screw and when the mixer housing is formed by means of an extension of the extruder housing.

Wie Versuche ergeben haben, führt die Erfindung tatsächlich zu einer erheblichen Vergleichmäßigung des Extrudats und damit zur Erhöhung der Festigkeitswerte und zum Fortfall der Unebenheiten in den nichtkalibrierten Wänden von Kunststofferzeugnissen.As tests have shown, the invention actually leads to one considerable equalization of the extrudate and thus to increase the strength values and the elimination of unevenness in the uncalibrated walls of plastic products.

Die Erfindung ist nachstehend an Hand der Zeichnung erläutert.The invention is explained below with reference to the drawing.

Es zeigen: Fig. 1 einen Einschneckenextruder mit Mischer zwischen der Schnecke und der DUse, schematisch, Fig. 2 den Mischer bei dem Extruder nach Fig. 1 mit nachgeschalteter Düse und vorgeschalteter Schnekke, vergrößert, im Längsschnitt, Fig. 3 einen Schnitt entlang der Linie A-A in Fig. 2, Fig. 4 den Mischerteil an eines Doppelschneckeneztruder, im Längsschnitt.They show: FIG. 1 a single-screw extruder with a mixer between the screw and the nozzle, schematically, Fig. 2 after the mixer in the extruder Fig. 1 with downstream nozzle and upstream screw, enlarged, in longitudinal section, 3 shows a section along the line A-A in FIG. 2, FIG. 4 shows the mixer part of a twin screw extruder, in longitudinal section.

Bei dem Einschneckenextruder nach Fig. 1 ist die antreibbare Schnecke 1 innerhalb des rohrzylindrischen Gehäuses 2 drehbeweglich eingebaut. Von dem Einfülltrichter 3 kommend, gelangt das Granulat in die Einzugszone I. Von hier aus wird der Kunststoff in die Umwandlungszone II und anschließend in die Ausstoß(Metering)-Zone III gefördert. Bei den bisher gebräuchlichen Extrudern schließt an die Meteringzone III der Spritzkopf, also das Werkzeug mit der Düse an.In the single-screw extruder according to FIG. 1, the drivable slug 1 installed within the tubular cylindrical housing 2 such that it can rotate. From the feed hopper 3, the granulate arrives in feed zone I. The plastic is made from here conveyed into the conversion zone II and then into the metering zone III. In the extruders that have been used up to now, the metering zone III is followed by the extrusion head, so the tool with the nozzle on.

In Abänderung der bekannten Maschine ist gemäß der Erfindung zwischen dem Werkzeug 4 mit der Düse 5 und der Schnecke 1 ein Mischer 6 eingebaut. Bei dem gezeigten Ausführungsbeispiel besteht der Mischer aus einer Welle 7 mit vorspringenden Nasen 8 und einem Gehäuse 9 mit Gegennasen 10, die mit den Nasen 8 zusammenwirken. Die Welle 7 ist fest mit der Schnecke 1 verbunden und führt infolgedessen auch deren Drehbewegung aus.In a modification of the known machine is according to the invention between A mixer 6 is installed in the tool 4 with the nozzle 5 and the screw 1. In which The mixer shown consists of a shaft 7 with protruding Lugs 8 and a housing 9 with counter lugs 10 which interact with the lugs 8. The shaft 7 is firmly connected to the worm 1 and consequently also guides the worm Rotary motion off.

Bei der Ausführung nach Fig. 1 bzw. Fig. 2 sind die Nasen 8 entlang des Umfanges der Welle 7 in fünf Reihen angeordnet.In the embodiment according to FIG. 1 and FIG. 2, the noses 8 are along the circumference of the shaft 7 arranged in five rows.

Auch die Gegennasen 10 sind reihenweise entlang des Innenmantels des Gehäuses 9 vorgesehen. Im Längsschnitt (Fig. 2) ragen die Nasen 8 in Lücken im Gehäuse 9 ein, wogegen die Gegennasen 10 in Lücken zwischen den Nasen 8 sich einsetzen. Das Gehäuse 9 des Mischers 6 stellt sich im übrigen gleichsam als Verlängerung des Extrudergehäuses 2 dar. In Abweichung vom dargestellten Ausführungsbeispiel kann die Zahl der Reihen beliebig gewählt werden. Auch braucht die Reihenzahl an der Welle 7 und am Gehäuse 9 nicht übereinstimmen.The opposing lugs 10 are also in rows along the inner jacket of the Housing 9 is provided. In the longitudinal section (FIG. 2), the noses 8 protrude into gaps in the housing 9, whereas the opposing lugs 10 are inserted in gaps between the lugs 8. The housing 9 of the mixer 6 is more or less an extension of the Extruder housing 2 is. In a departure from the illustrated embodiment the number of rows can be chosen arbitrarily. Also needs the number of rows on the Shaft 7 and housing 9 do not match.

Bei dem Extruder nach Fig. f gelangt der plastifizierte Kunststoffstrom aus der Meteringzone III in den nach Art eines Rührwerkmischers wirksamen Mischer 6, um hier innig durchmischt und zusätzlich feinstplastifiziert zu werden. Vom Mischer 6 aus gelangt der feinstplastifizierte Kunststoffstrom schließlich zum Werkzeug 4 und in die Düse 5.In the extruder according to FIG. F, the plasticized plastic stream arrives from the metering zone III into the mixer, which works like an agitator mixer 6, in order to be thoroughly mixed here and additionally finely plasticized. From the mixer 6 from the finely plasticized plastic stream finally reaches the tool 4 and into the nozzle 5.

Bei Doppelschneckenextrudern (Fig. 4) schließt an jede Schnekke 11, 12 im Extrudergehäuse 13 eine fest mit ihnen verbundene Mischerwelle 14 15 mit Nasen 16, 17 an, die mit Gegennasen 18, 19 im Mischergehäuse 20 zusammenwirken. Nach dem Austritt aus den beiden Mischerbereichen wird das Material zweckmäßigerweise durch ein Hosenstück 21 zu einem einzigen Strang zusammengeführt und dem nichtgezeigten Werkzeug zugeleitet.In twin-screw extruders (Fig. 4) each screw 11, 12 in the extruder housing 13 a mixer shaft 14 15 firmly connected to them with lugs 16, 17, which cooperate with counter lugs 18, 19 in the mixer housing 20. After this The material is expediently passed through from the two mixer areas a pant 21 merged into a single strand and the not shown Tool.

L e e r s e i t eL e r s e i t e

Claims (4)

Ansprüche 1. Verfahren zum Homogenisieren von plastifiziertem Kunststoff an Doppelschneckenextrudern, dadurch gekennzeichnet, daß der von der Schnecke (1) bzw. von den Schnecken (11,12) geförderte und plastifizierte Kunststoff vor Austritt aus der Düse anschließend an die übliche Meteringzone (III) einer Durchmischung und damit verbundener zusätzlicher Feinplastifizierung unterworfen wird. Claims 1. A method for homogenizing plasticized plastic on twin-screw extruders, characterized in that the screw (1) or plasticized plastic conveyed and plasticized by the screws (11, 12) before the outlet from the nozzle then to the usual metering zone (III) of a thorough mixing and is subjected to additional fine plasticization associated therewith. 2. Doppelschneckenextruder zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß in den Lauf des Kunststoff-Materialstromes von den Schnecken (11,12) zu der Düse (5) wenigstens ein Mischer (6) eingebaut ist.2. Twin screw extruder for performing the method according to claim 1, characterized in that in the course of the plastic material flow of the Screws (11, 12) to the nozzle (5) at least one mixer (6) is installed. 3. Doppelschneckeneztruder nach Anspruch 2, dadurch gekennzeichnet, daß der Mischer (6) nach Art eines Rührwerkmischers mit Nasen (8;16,17) tragender Welle (7;14,15) und mit einem Gegennasen (10;18,19) aufweisenden Gehäuse (9; 20) ausgebildet ist, wobei die Nasen und Gegennasen miteinander zusammenwirken.3. Twin screw extruder according to claim 2, characterized in that that the mixer (6) in the manner of an agitator mixer with lugs (8; 16,17) supporting Shaft (7; 14,15) and with a housing (9; 20) having counter lugs (10; 18,19) is formed, wherein the noses and counter-noses cooperate with one another. 4. Doppelschneckenextruder nach den Ansprüchen 2 und 3, dadurch gekennzeichnet, daß die Mischerwelle <14,15) fest mit den Schnecken (11,12) verbunden ist und daß das Mischergehäuse (20) mittels einer Verlängerung des Extrudergehäuses (13) gebildet ist.4. Twin screw extruder according to claims 2 and 3, characterized in that that the mixer shaft <14,15) is firmly connected to the screws (11,12) and that the mixer housing (20) by means of an extension of the extruder housing (13) is formed.
DE2650248A 1976-11-02 1976-11-02 Screw extruder for processing plasticizable plastics Expired DE2650248C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2650248A DE2650248C2 (en) 1976-11-02 1976-11-02 Screw extruder for processing plasticizable plastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2650248A DE2650248C2 (en) 1976-11-02 1976-11-02 Screw extruder for processing plasticizable plastics

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DE2650248A1 true DE2650248A1 (en) 1978-05-03
DE2650248C2 DE2650248C2 (en) 1985-06-05

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150757A1 (en) * 1980-12-27 1982-07-22 Ishikawajima-Harima Jukogyo K.K., Tokyo Mixing apparatus for an extruder for plastic materials
DE3438649A1 (en) * 1984-10-22 1986-04-24 Windmöller & Hölscher, 4540 Lengerich SINGLE SCREW EXTRUSION FOR THERMOPLASTIC AND ELASTOMERS
DE102016122277A1 (en) 2016-11-18 2018-05-24 Troester Gmbh & Co. Kg Pin-extruder
EP3241672A4 (en) * 2014-12-30 2018-08-01 Obshchestvo s Ogranichennoy Otvetstvennostyu "Avtoklavy Vysokogo Davleniya I Temperatury" Device for deformational processing of materials (variants)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE851691C (en) * 1943-01-17 1952-10-06 Basf Ag Screw injection machine
DE1245584B (en) * 1960-08-22 1967-07-27 Plastus S A Injection or compression head on the conveyor or plasticizing cylinder of a machine that processes plastic or plasticizable materials
US3676034A (en) * 1970-05-01 1972-07-11 American Can Co Extruder mixing screw
DE2340499B1 (en) * 1973-08-10 1975-01-02 Barmag Barmer Maschinenfabrik Ag, 5600 Wuppertal Multi-part screw for a screw extrusion press for processing plastics

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE851691C (en) * 1943-01-17 1952-10-06 Basf Ag Screw injection machine
DE1245584B (en) * 1960-08-22 1967-07-27 Plastus S A Injection or compression head on the conveyor or plasticizing cylinder of a machine that processes plastic or plasticizable materials
US3676034A (en) * 1970-05-01 1972-07-11 American Can Co Extruder mixing screw
DE2340499B1 (en) * 1973-08-10 1975-01-02 Barmag Barmer Maschinenfabrik Ag, 5600 Wuppertal Multi-part screw for a screw extrusion press for processing plastics

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150757A1 (en) * 1980-12-27 1982-07-22 Ishikawajima-Harima Jukogyo K.K., Tokyo Mixing apparatus for an extruder for plastic materials
DE3438649A1 (en) * 1984-10-22 1986-04-24 Windmöller & Hölscher, 4540 Lengerich SINGLE SCREW EXTRUSION FOR THERMOPLASTIC AND ELASTOMERS
EP3241672A4 (en) * 2014-12-30 2018-08-01 Obshchestvo s Ogranichennoy Otvetstvennostyu "Avtoklavy Vysokogo Davleniya I Temperatury" Device for deformational processing of materials (variants)
US10821645B2 (en) 2014-12-30 2020-11-03 Obshchestvo s ogranichennoy otvetstvennostyu “Avtoklavy vysokogo davleniya i temperatury” Device for deformational processing of materials (variants)
DE102016122277A1 (en) 2016-11-18 2018-05-24 Troester Gmbh & Co. Kg Pin-extruder

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