DE2748918C2 - Twin screw extruder with intermeshing conical extruder screws - Google Patents
Twin screw extruder with intermeshing conical extruder screwsInfo
- Publication number
- DE2748918C2 DE2748918C2 DE2748918A DE2748918A DE2748918C2 DE 2748918 C2 DE2748918 C2 DE 2748918C2 DE 2748918 A DE2748918 A DE 2748918A DE 2748918 A DE2748918 A DE 2748918A DE 2748918 C2 DE2748918 C2 DE 2748918C2
- Authority
- DE
- Germany
- Prior art keywords
- extruder
- screws
- worm
- gear
- twin screw
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/22—Extrusion presses; Dies therefor
- B30B11/24—Extrusion presses; Dies therefor using screws or worms
- B30B11/241—Drive means therefor; screw bearings
-
- 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
- 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
- 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
- B29B7/489—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
- B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
-
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
- B29C48/525—Conical 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
- B29C48/03—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
Die Erfindung betrifft einen Doppelschneckenextruder mit miteinander kämmenden konischen Extruderschnecken und einem zwischen diesen und einer Drehkraftquelle angeordneten Getriebe.The invention relates to a twin screw extruder with intermeshing conical extruder screws and a transmission arranged between these and a source of rotary power.
Bei einem aus der CH-FS 4 44 470 bekannten Doppelschneckenextruder der vorste: end genannten Art wird eine der Extruderschnecken über ein Keilriemen-Untersetzungsgetriebe von einem außerhalb des Extrudergehäuses angeordneten Elektromotor her angetrieben. Die angetriebene Extruderschneckenwelle ist mit einem Kegelzahnrad versehen, das mit einem auf der benachbarten Extruderschneckenwelle drehfest angeordneten Gegenkegelzahnrad kämmtIn a twin screw extruder known from CH-FS 4 44 470 of the type mentioned above, one of the extruder screws is connected to a V-belt reduction gear driven by an electric motor arranged outside the extruder housing. The driven extruder screw shaft is provided with a bevel gear, which is connected to a adjacent extruder worm shaft meshes with the counter-bevel gear arranged in a rotationally fixed manner
Aus der US-PS 24 66 934 ist ebenfalls ein Doppelschneckenextruder mit konischen Extruderschnecken bekannt, die allerdings nicht miteinander in Eingriff stehen, wobei ebenfalls eine der Extruderschnecken über ein Untersetzungsgetriebe von einem Motor her angetrieben wird und ihrerseits über Kegelzahnräder die benachbarte Extruderschneckenwelle antreibt Beide bekannten Ausführungsformen haben den Nachteil, daß der bauliche Aufwand verhältnismäßig hoch ist und daß viel Platz zur Unterbringung der Getriebeanordnung erforderlich ist. Der Konuswinkel der Kegelräder muß exakt auf den Winkel abgestimmt sein, den die beiden Schnecken miteinander bilden. Dies erfordert die Einhal'cung kleiner Toleranzen bei der Herstellung der Kegelräder und bei der Justierung beim Zusammenbau der Extruderschnecken und des Getriebes. Der Kegelzahnradantrieb, der die unter einem Winkel stehende zweite Extruderschneckenwelle antreibt, muß die geforderte Leistung bei den niedrigen Drehzahlen der Extruderschneckenwellen übertragen. Das hat entsprechend hohe Zahndrücke zur Folge. Für die eingesetzten Kegelzahnräder steht aber nur ein beschränkter Einbauraum zur Verfügung, so daß sich daraus eine entsprechend beschränkte Drehmomentübertragung ergibt. Wie man aus der US-PS 24 66 934 erkennt, sind zur Erzeugung der erforderlichen niedrigen Drehzahlen mehrstufige Untersetzungsgetriebe erforderlich. Der Riemenantrieb gemäß der CH-PS 4 44 470 ist nur zur Übertragung geringer Drehmomente geeignetFrom US-PS 24 66 934 a twin screw extruder with conical extruder screws is also known, which, however, are not in engagement with one another, one of the extruder screws also being over a reduction gear is driven by a motor and in turn the adjacent one via bevel gears Drives extruder screw shaft Both known embodiments have the disadvantage that the structural effort is relatively high and that a lot of space to accommodate the gear assembly is required. The cone angle of the bevel gears must be exactly matched to the angle that the two Form snails together. This requires the compliance with small tolerances in the manufacture of the bevel gears and when making adjustments when assembling the extruder screws and the gearbox. The bevel gear drive, which drives the angled second extruder screw shaft, must have the required Transfer power at the low speeds of the extruder screw shafts. That has correspondingly high Tooth pressure result. However, there is only limited installation space for the bevel gears used available, so that a correspondingly limited torque transmission results. How one from US-PS 24 66 934 recognizes, are multi-stage to generate the required low speeds Reduction gear required. The belt drive according to CH-PS 4 44 470 is only lower for transmission Suitable torques
Aus der US-PS 32 81 899 ist es ferner bekannt als Untersetzungsgetriebe zum Antrieb mehrerer Exruderschnecken ein Schneckengetriebe xu verwenden. Dabei treibt die Schneckenwelle ein Sonnenrad eines Planetengetriebes an, dessen Planetenräder jeweils mit einer ExtruderschneckenweUe drehfest verbunden iind. Dabei sind aber sämtliche Extruderschneckenwellen parallel zueinander gerichtet Ein solches Getriebe erlaubt zwar einen gleichmäßigen Antrieb der parallel zueinander gerichteten Extruderschnecken, jedoch ist dieses Getriebe für den Antrieb von zwei unter einem Winkel gegeneinander gerichteten konischen Extruderschnekken nicht geeignetFrom US-PS 32 81 899 it is also known as a reduction gear for driving several extruder screws use a worm gear xu. Included drives the worm shaft to a sun gear of a planetary gear, whose planet gears each with a Extruder screw shaft connected in a rotationally fixed manner. Included but all extruder screw shafts are directed parallel to each other. Such a gear is allowed a uniform drive of the extruder screws directed parallel to one another, but this is Gearbox for the drive of two conical extruder screws facing each other at an angle not suitable
Der Erfindung liegt die Aufgabe zugrunde, einen Doppelschneckenextruder der eingangs genannten Art so auszubilden, daß mit möglichst einfachen raumsparenden Mitteln einerseits eine Übertragung hoher Drehmomente auf die Extruderschnecken bei niedriger Drehzahl und andererseits ein völlig gleichmäßiger Antrieb der miteinander kämmenden konischen Extruderschnecken möglich istThe invention is based on the object of providing a twin-screw extruder of the type mentioned at the beginning to be trained so that with the simplest possible space-saving means on the one hand a high transmission Torques on the extruder screws at low speed and on the other hand a completely uniform drive the intermeshing conical extruder screws is possible
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Getriebe als Schneckenradgetriebe ausgebildet ist, dessen von cjer Drehkraftquelle angetriebene Schnecke mit senkrecht zur gemeinsamen Achsebene der Extruderschnecken gerichteter Achse in der Mitte zwischen den Extruderschneckenachsen angeordnet ist und mit zwei Schneckenrädern kämmt, die jeweils mit einer der Extruderschnecken in Antriebsverbindung stehen.According to the invention, this object is achieved in that the transmission is designed as a worm gear transmission which is driven by cjer torque source Screw with an axis in the middle that is perpendicular to the common axis plane of the extruder screws is arranged between the extruder screw axes and meshes with two worm wheels, each with one of the extruder screws are in drive connection.
Die erfindungsgemäße Lösung ist gegenüber den bisher bekannten Antrieben nicht nur einfacher, sondern bietet darüber hinaus auch noch den Vorteil eines völlig symmetrischen Antriebes der Extruderschnecken, der bei den bekannten Lösungen nicht erreicht wird, da bei diesen jeweils nur die eine Extruderschnecke von der Drehkraftquelle direkt angetrieben wird, während die zweite wiederum von der ersten her angetrieben wird. Bei der erfindungsgemäßen Lösung ist der Antrieb völlig unabhängig von dem Winkel, den die Achsen der Extruderschnecken miteinander bilden, so daß dieser Winkel zwischen den angetriebenen Achsen frei wählbar ist Da keine Kegelräder zur Drehmomentübertragung erforderlich sind, entfällt bei der erfindungsgemäßen Lösung der Aufwand, der mit der Einhaltung der Toleranzen und der Justierung beim Einbau der Extruderschnecken und des Getriebes in den bekanten Anordnungen erforderlich istThe solution according to the invention is not only simpler compared to the previously known drives, but also offers the advantage of a completely symmetrical drive for the extruder screws, the is not achieved in the known solutions, since in these only one extruder screw from the Torque source is driven directly, while the second is in turn driven by the first. In the solution according to the invention, the drive is completely independent of the angle that the axes of the Form extruder screws with one another, so that this angle between the driven axes can be freely selected Since no bevel gears are required for torque transmission, the invention does not apply Solving the effort involved in maintaining the tolerances and adjusting when installing the extruder screws and the transmission is required in the known arrangements
Die Schneckenräder können unmittelbar auf den zugehörigen Schneckenwellen befestigt sein. In vielen Fällen wird es sich jedoch empfehlen, zwischen den Schnekkenrädern und den Wellen der Extruderschnecken noch jeweils eine Getrieberadstufe anzuordnen. Pfeilverzahnungen und ähnliche Maßnahmen zur Erhöhung der Kraftübertragung sind dabei möglich. Hierdurch ist man frei in der Wahl eines ensprechend starken Schneckentriebes, und die Übersetzung kann so gewählt werden, daß der Schneckentrieb im Bereich des günstigsten Wirkungsgrades liegt. Dabei ist es keinesfalls notwendig, daß die Achsen der Schneckenräder in derselben Ebene liegen wie die Achsen der angetriebenen Zahnräder.The worm wheels can be attached directly to the associated worm shafts. In many cases however, it will be advisable to still place between the worm wheels and the shafts of the extruder screws to arrange one gear wheel stage in each case. Herringbone gears and similar measures to increase the Power transmission is possible. This means that you are free to choose a correspondingly strong worm drive, and the translation can be chosen so that the worm drive is in the range of the most favorable efficiency lies. It is by no means necessary that the axes of the worm gears are in the same plane lie like the axes of the driven gears.
Die Erfindung ist nachstehend anhand der Zeichnung erläutert, die ein Ausführungsbeispiel und eine Abwandlung des Antriebes veranschaulicht. Es zeigtThe invention is explained below with reference to the drawing, which shows an embodiment and a modification of the drive illustrated. It shows
F i g. 1 einen Doppelschneckenextruder mit unmittelbarem Schneckenantrieb, schematisch, im Längsschnitt,F i g. 1 a double screw extruder with direct screw drive, schematically, in longitudinal section,
F i g. 2 eine Ausführung des Schneckentriebes mit einer nachgeschalteten Zahnradstufe mit zylindrischen Zahnrädern.F i g. 2 an embodiment of the worm drive with a downstream gear stage with cylindrical Gears.
Der Doppelschneckenextruder 1 umfaßt im wesentlichen den Zylinder 2 mit den konischen Extruderschnekken3und4.The twin-screw extruder 1 essentially comprises the cylinder 2 with the conical extruder screws 3 and 4.
Der Einfülltrichter, der in der gewählten Schnittdarstellung nicht sichtbar ist, wird durch die gestrichelte Kreislinie, die mit 5 bezeichnet wurde; angedeutetThe filling funnel, which is not visible in the selected sectional view, is indicated by the dashed line Circular line, which was designated by 5; indicated
Die Wellen 6 und 7 der konischen Extruderschnecken 3 und 4 weisen am freien Ende je ein Schneckenrad 8 und 9 auf. Beide Schneckenräder stehen in Eingriff mit der Schnecke 10. Diese erhält ihren Antrieb über einen nicht gezeigte» Elektromotor.The shafts 6 and 7 of the conical extruder screws 3 and 4 each have a worm wheel 8 at the free end and 9 on. Both worm gears are in engagement with the worm 10. This is driven by a not shown »electric motor.
Die Achse der Schnecke 10-sieht senkrecht auf einer durch das Zentrum beider Extruderschnecken 3 und 4 gelegten Ebene.The axis of the worm 10 looks perpendicular to one through the center of both extruder screws 3 and 4 laid plane.
Damit die Rückdruckkräfte von den konischen Extruderschnecken 3 und 4 nicht an den Schneckentrieb gelangen, sind die Wellen δ und 7 mittels der Axiallager 11 und 12 am Getriebegehäuse 13 abgestütztSo that the back pressure forces from the conical extruder screws 3 and 4 do not reach the worm drive, the shafts δ and 7 are by means of the axial bearings 11 and 12 supported on the transmission housing 13
Bei solcher Ausbildung des Antriebes der konischen Extruderschnecken kann mit einer einzigen Untersetzungsstufe ein äußerst hoher Untersetzungssprung erreicht werden, wobei der Raumbedarf des Gesamtgetriebes äußerst niedrig liegt und sich der zusätzliche Vorteil bietet, daß die Winkelstellung der Extruderschnecken frei wählbar istWith such a design of the drive for the conical extruder screws, an extremely high step-down step can be achieved with a single step-down step, the space requirement of the overall transmission being extremely low and the additional The advantage is that the angular position of the extruder screws can be freely selected
In vielen Fällen kann es zur Erzielung des optimalen Wirkungsgrades des Schneckentriebes günstig sein, die Ausbildung gemäß F i g. 2 zu treffen, wonach zwischen den Schneckenrädern 14 und 15 und den Wellen 16 und 17 der Extruderschnecken jeweils eine Getrieberadstufe 18 und 19 angeordnet ist Bei der Ausführung nach F i g. 2 wird jede Getrieberadstufe mittels zweier zylindrischer Stirnzahnräder 20,21 bzw. 22,23 gebildet Die Schnecke ist in F i g. 2 mit 24 bezeichnetIn many cases it can be beneficial to achieve the optimal efficiency of the worm drive, the Training according to FIG. 2 to meet, after which between the worm wheels 14 and 15 and the shafts 16 and 17 of the extruder screws each have a gear wheel stage 18 and 19 arranged in the execution according to F i g. 2 each gear stage is formed by means of two cylindrical spur gears 20, 21 and 22, 23 respectively Snail is shown in FIG. 2 denoted by 24
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Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2748918A DE2748918C2 (en) | 1977-11-02 | 1977-11-02 | Twin screw extruder with intermeshing conical extruder screws |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2748918A DE2748918C2 (en) | 1977-11-02 | 1977-11-02 | Twin screw extruder with intermeshing conical extruder screws |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2748918A1 DE2748918A1 (en) | 1979-05-03 |
| DE2748918C2 true DE2748918C2 (en) | 1986-10-30 |
Family
ID=6022779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2748918A Expired DE2748918C2 (en) | 1977-11-02 | 1977-11-02 | Twin screw extruder with intermeshing conical extruder screws |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2748918C2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3420918A1 (en) * | 1984-06-05 | 1985-12-05 | Johannes Dr. 8640 Kronach Weber | Twin-screw extruder |
| CA2049256A1 (en) * | 1990-08-22 | 1992-02-23 | Masao Moriyama | Twin conical screw extruder |
| JP2962625B2 (en) * | 1992-11-16 | 1999-10-12 | 株式会社神戸製鋼所 | Cone type twin screw extruder |
| US5483852A (en) * | 1993-12-17 | 1996-01-16 | The Gates Rubber Company | Twin screw extruder and torque splitting transmission |
| NL9401105A (en) * | 1994-07-01 | 1996-02-01 | Laurentius Gerardus Johannes W | Transmission |
| IT1277236B1 (en) * | 1995-11-21 | 1997-11-05 | Pomini Spa | MACHINE WITH TWO CONVERGENT THREADED ROTORS FOR THE EXTRUCTION OF PLASTOMERS, ELASTOMERS AND SIMILAR |
| DE29703158U1 (en) * | 1997-02-22 | 1997-05-22 | Rehau Ag + Co, 95111 Rehau | Twin screw extruder |
| DE19856534A1 (en) * | 1998-12-08 | 2000-06-15 | Flender A F & Co | Gear unit for a twin screw extruder |
| DE102004012569A1 (en) * | 2004-03-12 | 2005-09-29 | A. Friedr. Flender Ag | Gearbox for a twin-screw extruder |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2466934A (en) * | 1946-01-05 | 1949-04-12 | Charles E Dellenbarger | Extruding machine for plastic material |
| DE803325C (en) * | 1948-10-02 | 1951-04-02 | Karl Moritz Dipl Ing | Screw press |
| DE1289301B (en) * | 1963-01-28 | 1969-02-13 | Dacco Ernesto | Conveyor and injection device for injection molding machines |
| CH444470A (en) * | 1965-09-21 | 1967-09-30 | Ekma Entwicklungs Und Maschine | Process for extruding and extruders for carrying out the process |
| US3416189A (en) * | 1967-03-10 | 1968-12-17 | Benjamin P. Welt | Shaft seal for extruders of heat-sensitive plastics and like materials |
-
1977
- 1977-11-02 DE DE2748918A patent/DE2748918C2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2748918A1 (en) | 1979-05-03 |
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