WO1997018940A1 - Extruder housing with wear-resistant core - Google Patents

Extruder housing with wear-resistant core Download PDF

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Publication number
WO1997018940A1
WO1997018940A1 PCT/EP1996/004975 EP9604975W WO9718940A1 WO 1997018940 A1 WO1997018940 A1 WO 1997018940A1 EP 9604975 W EP9604975 W EP 9604975W WO 9718940 A1 WO9718940 A1 WO 9718940A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
extruder housing
shaped shell
shell
housing according
Prior art date
Application number
PCT/EP1996/004975
Other languages
German (de)
French (fr)
Inventor
Siegward Rockstedt
Original Assignee
Compex Gmbh Compoundier- Und Extrusionsanlagen
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 Compex Gmbh Compoundier- Und Extrusionsanlagen filed Critical Compex Gmbh Compoundier- Und Extrusionsanlagen
Publication of WO1997018940A1 publication Critical patent/WO1997018940A1/en

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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
    • B29C48/682—Barrels or cylinders for twin 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
    • B29C48/68—Barrels or cylinders
    • B29C48/6801—Barrels or cylinders characterised by the material or their manufacturing process
    • 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

Definitions

  • the invention relates to an extruder housing with a wear-resistant core and surrounding, but soft shell.
  • wear-resistant cores have already been created which can be used in an extruder housing and which are made of particularly wear-resistant material.
  • Such a design is known for example from DE-PS 3 010 659.
  • the invention is based on the object of designing the connection of the extruder housing and the wear-resistant core in such a way that simple installation and removal is made possible without there being any problems with regard to fitting the core into the extruder housing.
  • this is done in that the jacket consists of a U-shaped shell and a cover resting on the legs of the shell, which presses the core tightly into the shell while being screwed to the legs.
  • the design of the casing of the extruder housing as a U-shaped shell makes it possible.
  • a worn core can be easily removed from the shell by loosening the screw connection and replaced with a new core. This can be easily accomplished at the location of use of the extruder in question, without the extruder having to be shipped to any special processing location for the exchange of the core.
  • the U-shaped shell can be designed in different ways. It is thus possible to give the U-shaped shell a cross-section of a rectangular receptacle, in which the appropriate core is then to be inserted.
  • the U-shaped shell forms a trapezoidal receptacle that widens outwards in cross section for the core that fits here.
  • the core is pressed particularly tightly into the receptacle by pressing in the core by means of the screw connection through the cover.
  • U-shaped shell forms a round receptacle in the cross section for the core that fits here.
  • the core which in this case is round on the outside, then fits snugly into the corresponding rounding of the receptacle, so that any remaining gaps between the receptacle and the core are practically excluded.
  • both the receptacle and the core can be produced with conventional machine tools while maintaining high accuracy.
  • the plot connecting the two legs of the U-shaped shell is expediently provided with bores for a heating or cooling medium.
  • the cover which can also be provided with holes for a heating or cooling medium.
  • Figure 1 The three essential parts of the extruder housing in an exploded view, namely U-shaped shell, wear-resistant core and lid.
  • Figure 2 The assembly of the parts of Figure 1 with their screw.
  • Figure 3 A side view of the arrangement of Figure 2 with the openings of the holes for the heating or cooling medium.
  • Figure 4 An extruder housing with an outwardly widening, trapezoidal receptacle of the U-shaped shell.
  • Figure 5 An extruder housing with a round receptacle of the U-shaped shell.
  • FIG. 1 shows the three parts of the extruder housing according to the invention that are essential in this context, namely U-shaped shell 1, wear-resistant core 2 and cover 3.
  • the U-shaped shell 1 consists of the two legs 4 and 5 and the plot 6 connecting them.
  • the wear-resistant core 2 fits, which here merges with two Bores 7 and 8 is provided for receiving a twin screw.
  • U-shaped shell 1 and wear-resistant core 2 are shown shortened here. Normally, these parts extend in the direction of the axes of the holes 7 and 8 over a greater length, for example 50 cm.
  • Such extruder housings are then arranged one behind the other and connected to one another to form a correspondingly long extruder housing.
  • the wear-resistant core 2 is so machined with respect to its outer surfaces that it fits snugly into the free space between the two legs 4 and 5 and thereby abuts the inner surfaces of the legs 4 and 5. In this way there is good contact for heat transfer between the parts.
  • the core 3 is fastened in the U-shaped shell 1 by the cover 3, which is placed on the core used and screwed to the two legs 4 and 5. This will be explained with reference to FIG. 2.
  • FIG. 2 shows the components shown in FIG. 1 in the assembled position, in which the cover 3 is pressed onto the two legs 4 and 5 by means of the screws 9 and 10, the cover 3 inserting the core 2 into the space between the two legs 4 and 5 presses, bringing about an intimate contact between the three components.
  • FIG. 2 only the two screws 9 and 10 are shown. However, it should be pointed out that several screws are arranged one behind the other in the axial direction of the extruder housing, as shown in FIG. 1 by the screw holes 11 and 12 in connection with the two legs 4 and 5.
  • FIG. 3 shows the arrangement according to FIG. 2 in a side view, in which the openings 13 and 14 for a heating medium and 15 and 16 for a cooling medium can be seen.
  • the bores extending behind these openings run transversely to the longitudinal direction of the extruder housing, which also results from the illustration according to FIG. 2, in which the bores 13 and 14 are shown in dashed lines.
  • Water, oil or air can be used as the heating or cooling medium.
  • electrically operated heating cartridges in the heating bores.
  • the bores running transversely to the longitudinal direction of the extruder housing are easy to produce because of their direction and make it possible to bring about any desired circulation or outflow and inflow through attached connections.
  • the position of the bores 13, 14, 15 and 16 can easily be chosen so that they run close to the outer surface of the core 2, so that the temperature influence of the core emanating from the bores is particularly intense.
  • FIG. 4 shows a variation of the design according to FIGS. 1 to 3, which involves making the receptacle formed by the U-shaped shell trapezoidal in cross section with an opening that widens outwards.
  • the U-shaped shell 17 here has the two legs 19 and 20, which stray obliquely outwards from the plot 18 and thus form a wedge-shaped opening which opens outwards as a space between the two legs 19 and 20.
  • the core 21 is pressed between the legs 19 and 20 by means of the cover 22, specifically by means of the screws 23 and 24. In this way, intimate contact is made between the three components of the extruder housing.
  • FIG. 5 shows a further modification of an extruder housing, in which the U-shaped shell 25 forms a receptacle which is round in cross-section and into which the likewise round-shaped core 26 fits.
  • the 26 is here encompassed by the U-shaped shell 25 and the likewise inwardly round core 26, which is pulled by means of the screws 28 and 29 to the U-shaped shell 25 and thereby the full inclusion of the core 26 in the U-shaped Tray 25 and the lid 27 causes.

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

Abstract

The invention relates to an extruder housing with a wear-resistant core (2) and a surrounding relatively softer outer mantel. The outer mantel comprises a U-shaped shell (1) and a cover (3) lying on the sides (4, 5) of the shell. The cover when screwed onto the sides (4, 5) forces the core (2) into the shell in a close fit.

Description

Extrudergehäuse mit verschleißfestem Kern Extruder housing with wear-resistant core
Die Erfindung bezieht sich auf ein Extrudergehäuse mit verschleißfestem Kern und diesen umgebenden, demgegenüber weichen Mantel.The invention relates to an extruder housing with a wear-resistant core and surrounding, but soft shell.
Wegen der starken Oberflächenbelastung, die die in einem Extruder sich drehenden Schnecken auf die innere Oberfläche des Extrudergehäuses ausüben, hat man bereits verschleißfeste Kerne geschaffen, die in ein Extrudergehäuse einsetzbar sind und die aus besonders verschleißfestem Material bestehen. Eine solche Gestaltung ist beispielsweise aus der DE- PS 3 010 659 bekannt.Because of the strong surface load that the screws rotating in an extruder exert on the inner surface of the extruder housing, wear-resistant cores have already been created which can be used in an extruder housing and which are made of particularly wear-resistant material. Such a design is known for example from DE-PS 3 010 659.
Problematisch bei dieser Gestaltung ist die Einfügung des verschleißfesten Kerns in das Extrudergehäuse. Dabei ist darauf zu achten, daß sich beim Zusammenbau von Kern und Extrudergehäuse keine Spalten ausbilden, die den Wärmeübergang vom Kern zum Extrudergehäuse unterbrechen würden. Aus diesem Grunde erfordern sowohl die Kerne als auch die für die Kerne vorgesehenen Aufnahmen in den Extnidergehäusen eine hohe Genauigkeit. Andererseits besteht aber auch das Bedürfnis, im Falle von Verschleiß einen Kern auszuwechseln. Bei der Gestaltung gemäß der DE- PS 3 010 659 ist der Kern nur teilweise mit hoher Maßgenauigkeit gefertigt und bestimmte Übergangsbereiche mit Einwölbungen versehen, die dann nach dem Einbau des Kerns in das Extrudergehäuse durch ein fließfähiges Metall oder Metallgemisch ausgefüllt (werden?). Dies er¬ schwert eine spätere Auswechslung des Kerns.The problem with this design is the insertion of the wear-resistant core into the extruder housing. Care should be taken to ensure that no gaps form during assembly of the core and extruder housing, which would interrupt the heat transfer from the core to the extruder housing. For this reason, both the cores and the receptacles provided for the cores in the external housing require high accuracy. On the other hand, there is also the need to replace a core in the event of wear. In the design according to DE-PS 3 010 659, the core is only partially with high dimensional accuracy manufactured and certain transition areas provided with bulges, which are then filled with a flowable metal or metal mixture after installation of the core in the extruder housing. This makes it difficult to replace the core later.
Um ein sattes Anliegen des Kerns an der Innenfläche des Extruderge¬ häuses zu gewährleisten, ist man auch schon so vorgegangen, daß das Extrudergehäuse auf den Kern aufgeschrumpft wird.In order to ensure that the core fits snugly against the inner surface of the extruder housing, one has already proceeded in such a way that the extruder housing is shrunk onto the core.
Der Erfindung hegt die Aufgabe zugrunde, die Verbindung von Extruder¬ gehäuse und verschleißfestem Kern so zu gestalten, daß damit ein ein¬ facher Ein- und Ausbau ermöglicht wird, ohne daß sich hinsichtlich der Einpassung des Kerns in das Extrudergehäuse Probleme ergeben. Erfin¬ dungsgemäß geschieht dies dadurch, daß der Mantel aus einer U-förmi- gen Schale und einem auf den Schenkeln der Schale aufliegenden Deckel besteht, die unter Verschraubung mit den Schenkeln den Kern in die Schale satt passend drückt.The invention is based on the object of designing the connection of the extruder housing and the wear-resistant core in such a way that simple installation and removal is made possible without there being any problems with regard to fitting the core into the extruder housing. According to the invention, this is done in that the jacket consists of a U-shaped shell and a cover resting on the legs of the shell, which presses the core tightly into the shell while being screwed to the legs.
Die Gestaltung des Mantels des Extrudergehäuses als U-förmige Schale ermöglicht es. den Innenflächen der Schale eine solche Gestaltung zu geben, daß deren Innenflächen in üblicher Weise mittels einer Werkzeug¬ maschine ausgearbeitet werden können, wobei sich eine hohe Genauigkeit für diese Innenflächen erzielen läßt, z.B. durch Fräsen, Schleifen oder Bohren. In die U-förmige Schale satt passend eindrücken, dessen Außen- fläche ebenfalls problemlos eine hohe Maßgenauigkeit gegeben werden kann. Damit dann diese beiden Teile fest und unter Vermeidung von Spaltbildung miteinander verbunden werden, ist die Verschraubung zwi¬ schen Deckel und Schale vorgesehen, durch die der Deckel gegen die Schenkel der U-förmigen Schale gepresst wird, womit automatisch der Kern in die Schale eingedrückt wird. Aufgrund dieser Gestaltung läßt sich durch Lösen der Verschraubung ein verschlissener Kern leicht aus der Schale herausnehmen und durch einen neuen Kern ersetzen. Dies läßt sich problemlos am Ort der Verwendung des betreffenden Extruders herbeiführen, ohne daß also der Extruder für die Auswechslung des Kernes in irgendeine Spezial-Bearbeitungsstelle verschickt werden muß.The design of the casing of the extruder housing as a U-shaped shell makes it possible. To give the inner surfaces of the shell such a design that its inner surfaces can be worked out in the usual way by means of a machine tool, it being possible to achieve a high level of accuracy for these inner surfaces, for example by milling, grinding or drilling. Press firmly into the U-shaped shell, the outer surface of which can also be given a high degree of dimensional accuracy. So that these two parts are then firmly connected to one another while avoiding the formation of gaps, the screw connection is provided between the lid and the shell, through which the lid is pressed against the legs of the U-shaped shell, whereby the core is automatically pressed into the shell . Due to this design, a worn core can be easily removed from the shell by loosening the screw connection and replaced with a new core. This can be easily accomplished at the location of use of the extruder in question, without the extruder having to be shipped to any special processing location for the exchange of the core.
Die U-förmige Schale läßt sich in verschiedener Weise gestalten. So ist es möglich, der U-föπnigen Schale einen Querschnitt rechteckiger Auf¬ nahme zu geben, in die dann der hierein passende Kern satt einzusetzen ist.The U-shaped shell can be designed in different ways. It is thus possible to give the U-shaped shell a cross-section of a rectangular receptacle, in which the appropriate core is then to be inserted.
Eine weitere Gestaltungsmöglichkeit besteht darin, daß die U-förmige Schale eine im Querschnitt sich nach außen erweiternde, trapezförmige Aufnahme für den hierein passenden Kern bildet. In diesem Falle wird durch das Eindrücken des Kernes mittels der Verschraubung durch den Deckel der Kern besonders dicht in die Aufnahme gedrückt.Another design option is that the U-shaped shell forms a trapezoidal receptacle that widens outwards in cross section for the core that fits here. In this case, the core is pressed particularly tightly into the receptacle by pressing in the core by means of the screw connection through the cover.
Eine weitere Gestaltungsmöglichkeit besteht darin, daß die U-förmige Schale eine im Querschmtt runde Aufnahme für den hierein passenden Kern bildet. Der in diesem Falle außen runde Kern setzt sich dann satt in die entsprechende Rundung der Aufnahme hinein, womit irgendwelche verbleibenden Spalten zwischen Aufnahme und Kern praktisch ausge¬ schlossen sind.Another design option is that the U-shaped shell forms a round receptacle in the cross section for the core that fits here. The core, which in this case is round on the outside, then fits snugly into the corresponding rounding of the receptacle, so that any remaining gaps between the receptacle and the core are practically excluded.
In allen den vorstehend beschriebenen Fällen läßt sich sowohl die Auf¬ nahme als auch der Kern mit üblichen Werkzeugmaschinen unter Ein¬ haltung einer hohen Genauigkeit herstellen. Um bei einem derartigen Extrudergehäuse für die notwendige Heizung bzw. Kühlung zu sorgen, versieht man zweckmäßig das die beiden Schen¬ kel der U-förmigen Schale verbindende Grundstück mit Bohrungen für ein Heiz- oder Kühlmedium. Das gleiche gilt für die Ausbildung des Deckels, der ebenfalls mit Bohrungen für ein Heiz- oder Kühlmedium versehen werden kann.In all the cases described above, both the receptacle and the core can be produced with conventional machine tools while maintaining high accuracy. In order to provide the necessary heating or cooling in such an extruder housing, the plot connecting the two legs of the U-shaped shell is expediently provided with bores for a heating or cooling medium. The same applies to the design of the cover, which can also be provided with holes for a heating or cooling medium.
In den Figuren sind Ausführungsbeispiele der Erfindung dargestellt. Es zeigen:Exemplary embodiments of the invention are shown in the figures. Show it:
Figur 1: Die drei wesentlichen Teile des Extrudergehäuses in auseinandergezogener Darstellung, nämlich U-förmige Schale, verschleißfester Kern und Deckel.Figure 1: The three essential parts of the extruder housing in an exploded view, namely U-shaped shell, wear-resistant core and lid.
Figur 2: Die Zusammenstellung der Teile gemäß Figur 1 mit ihrer Verschraubung.Figure 2: The assembly of the parts of Figure 1 with their screw.
Figur 3: Eine Seitenansicht der Anordnung gemäß Figur 2 mit den Öffnungen der Bohrungen für das Heiz- oder Kühlrnedium.Figure 3: A side view of the arrangement of Figure 2 with the openings of the holes for the heating or cooling medium.
Figur 4: Ein Extrudergehäuse mit einer sich nach außen erwei¬ ternden, trapezförmigen Aufnahme der U-förmigen Schale.Figure 4: An extruder housing with an outwardly widening, trapezoidal receptacle of the U-shaped shell.
Figur 5: Ein Extrudergehäuse mit einer runden Aufnahme der U-förmigen Schale.Figure 5: An extruder housing with a round receptacle of the U-shaped shell.
Figur 1 zeigt die drei in diesem Zusammenhang wesentlichen Teile des erfindungsgemäßen Extrudergehäuses, nämlich U-förmige Schale 1, ver- schleißfester Kern 2 und Deckel 3. Die U-förmige Schale 1 besteht aus den beiden Schenkeln 4 und 5 und dem diese verbindenden Grundstück 6. In den Freiraum zwischen den beiden Schenkeln 4 und 5 paßt der verschleißfeste Kern 2, der hier mit zwei ineinander übergehenden Bohrungen 7 und 8 für die Aufnahme einer Doppelschnecke versehen ist. Aus Gründen der Vereinfachung der Darstellung sind hier U-förmige Schale 1 und verschleißfester Kern 2 verkürzt gezeichnet. Im Normalfall erstrecken sich diese Teile in Richtung der Achsen der Bohrungen 7 und 8 über eine größere Länge, z.B. 50 cm. Derartige Extrudergehäuse werden dann hintereinander angeordnet und zu einem entsprechend langen Extrudergehäuse miteinander verbunden.FIG. 1 shows the three parts of the extruder housing according to the invention that are essential in this context, namely U-shaped shell 1, wear-resistant core 2 and cover 3. The U-shaped shell 1 consists of the two legs 4 and 5 and the plot 6 connecting them. In the space between the two legs 4 and 5 the wear-resistant core 2 fits, which here merges with two Bores 7 and 8 is provided for receiving a twin screw. For the sake of simplifying the illustration, U-shaped shell 1 and wear-resistant core 2 are shown shortened here. Normally, these parts extend in the direction of the axes of the holes 7 and 8 over a greater length, for example 50 cm. Such extruder housings are then arranged one behind the other and connected to one another to form a correspondingly long extruder housing.
Der verschleißfeste Kern 2 ist hinsichtlich seiner Außenflächen so be¬ arbeitet, daß er satt in den Freiraum zwischen den beiden Schenkeln 4 und 5 paßt und dabei an den Innenflächen der Schenkel 4 und 5 an¬ hegt. Auf diese Weise ergibt sich für einen Wärmeübergang zwischen den Teilen ein guter Kontakt.The wear-resistant core 2 is so machined with respect to its outer surfaces that it fits snugly into the free space between the two legs 4 and 5 and thereby abuts the inner surfaces of the legs 4 and 5. In this way there is good contact for heat transfer between the parts.
Der Befestigung des Kerns 2 in der U-förmigen Schale 1 dient der Deckel 3, der auf den eingesetzten Kern aufgelegt und mit den beiden Schenkeln 4 und 5 verschraubt wird. Dies sei anhand der Figur 2 erläu¬ tert.The core 3 is fastened in the U-shaped shell 1 by the cover 3, which is placed on the core used and screwed to the two legs 4 and 5. This will be explained with reference to FIG. 2.
Figur 2 zeigt die in der Figur 1 dargestellten Bauteile in montierter Lage, bei der der Deckel 3 mittels der Schrauben 9 und 10 an die beiden Schenkel 4 und 5 angedrückt wird, wobei der Deckel 3 den Kern 2 in den Freiraum zwischen den beiden Schenkeln 4 und 5 preßt, womit ein inniger Kontakt zwischen den drei Bauteilen herbeigeführt wird. In der Figur 2 sind nur die beiden Schrauben 9 und 10 dargestellt. Es sei jedoch darauf hingewiesen, daß in axialer Richtung des Extruderge¬ häuses mehrere Schrauben hintereinander angeordnet sind, wie dies in der Figur 1 durch die Schraubenlöcher 11 und 12 im Zusammenhang mit den beiden Schenkeln 4 und 5 dargestellt ist.FIG. 2 shows the components shown in FIG. 1 in the assembled position, in which the cover 3 is pressed onto the two legs 4 and 5 by means of the screws 9 and 10, the cover 3 inserting the core 2 into the space between the two legs 4 and 5 presses, bringing about an intimate contact between the three components. In Figure 2, only the two screws 9 and 10 are shown. However, it should be pointed out that several screws are arranged one behind the other in the axial direction of the extruder housing, as shown in FIG. 1 by the screw holes 11 and 12 in connection with the two legs 4 and 5.
Figur 3 zeigt die Anordnung gemäß Figur 2 in Seitensicht, in der die Öffnungen 13 und 14 für ein Heizmedium und 15 und 16 für ein Kühl¬ medium zu sehen sind. Die sich hinter diesen Öffnungen erstreckenden Bohrungen verlaufen quer zur Längsrichtung des Extrudergehäuses, was sich auch aus der Darstellung gemäß Figur 2 ergibt, m der die Bohrun¬ gen 13 und 14 gestrichelt eingezeichnet smd. Als Heiz- oder Kühlmedium kann Wasser, Öl oder auch Luft verwendet werden. Es ist aber auch möglich, in die Bohrungen zur Heizung elektrisch betriebene Heizpatro- nen einzusetzen. Die quer zur Längsrichtung des Extrudergehäuses ver¬ laufenden Bohrungen sind wegen ihrer Richtung leicht herstellbar und ermöglichen es, durch angesetzte Anschlüsse einen beliebigen Kreislauf bzw. Ab- und Zuflüsse herbeizuführen. Die Lage der Bohrungen 13, 14, 15 und 16 kann problemlos so gewählt werden, daß diese dicht neben der Außenfläche des Kerns 2 verlaufen, so daß die von den Bohrungen ausgehende Temperaturbeeinflussung des Kerns besonders intensiv ist.FIG. 3 shows the arrangement according to FIG. 2 in a side view, in which the openings 13 and 14 for a heating medium and 15 and 16 for a cooling medium can be seen. The bores extending behind these openings run transversely to the longitudinal direction of the extruder housing, which also results from the illustration according to FIG. 2, in which the bores 13 and 14 are shown in dashed lines. Water, oil or air can be used as the heating or cooling medium. However, it is also possible to use electrically operated heating cartridges in the heating bores. The bores running transversely to the longitudinal direction of the extruder housing are easy to produce because of their direction and make it possible to bring about any desired circulation or outflow and inflow through attached connections. The position of the bores 13, 14, 15 and 16 can easily be chosen so that they run close to the outer surface of the core 2, so that the temperature influence of the core emanating from the bores is particularly intense.
In der Figur 4 ist eine Abwandung der Gestaltung gemäß den Figuren 1 bis 3 dargestellt, bei der es sich darum handelt, die durch die U- förmige Schale gebildete Aufnahme im Querschnitt trapezförmig mit sich nach außen erweiternder Öffnung zu gestalten. Die U-förmige Schale 17 besitzt hier die beiden schräg nach außen von dem Grundstück 18 wegstrebenden Schenkel 19 und 20, die damit eine sich keilförmig nach außen öffnende Aufnahme als Freiraum zwischen den beiden Schenkeln 19 und 20 bilden. In den Freiraum zwischen den beiden Schenkeln 19 und 20 ist der in gleicher Weise geformte Kern 21 eingelegt, dessen Außenflächen sich satt an die Innenflächen der U-förmigen Schale 17 anlegen. Der Kern 21 wird wie bei der Ausführungsform gemäß den Figuren 1 bis 3 mittels des Deckels 22 zwischen die Schenkel 19 und 20 gedrückt, und zwar mittels der Schrauben 23 und 24. Auf diese Weise wird ein inniger Berührungskontakt zwischen den drei Bauteilen des Extrudergehäuses hergestellt.FIG. 4 shows a variation of the design according to FIGS. 1 to 3, which involves making the receptacle formed by the U-shaped shell trapezoidal in cross section with an opening that widens outwards. The U-shaped shell 17 here has the two legs 19 and 20, which stray obliquely outwards from the plot 18 and thus form a wedge-shaped opening which opens outwards as a space between the two legs 19 and 20. In the space between the two legs 19 and 20 is inserted the same shaped core 21, the outer surfaces of which fit snugly against the inner surfaces of the U-shaped shell 17. As in the embodiment according to FIGS. 1 to 3, the core 21 is pressed between the legs 19 and 20 by means of the cover 22, specifically by means of the screws 23 and 24. In this way, intimate contact is made between the three components of the extruder housing.
Figur 5 zeigt eine weitere Abwandlung eines Extrudergehäuses, bei dem die U-förmige Schale 25 eine im Querschnitt runde Aufnahme bildet, in die satt der ebenfalls rund gestaltete Kern 26 paßt. Der 26 wird hier von der U-förmigen Schale 25 und dem ebenfalls nach innen runden Kern 26 umfaßt, der mittels der Schrauben 28 und 29 an die U-förmige Schale 25 herangezogen wird und dabei den satten Einschluß des Kerns 26 in die U-förmige Schale 25 und den Deckel 27 bewirkt. FIG. 5 shows a further modification of an extruder housing, in which the U-shaped shell 25 forms a receptacle which is round in cross-section and into which the likewise round-shaped core 26 fits. The 26 is here encompassed by the U-shaped shell 25 and the likewise inwardly round core 26, which is pulled by means of the screws 28 and 29 to the U-shaped shell 25 and thereby the full inclusion of the core 26 in the U-shaped Tray 25 and the lid 27 causes.

Claims

Schutz ansprüche Protection claims
1. Extrudergehäuse mit verschleißfestem Kern und diesen umgebenden, demgegenüber weichem Mantel, dadurch gekennzeichnet, daß der Mantel aus einer U-förmigen Schale (1) und einem auf den Schen¬ kel der Schale aufliegenden Deckel (3) besteht, der unter Verschrau- hung mit den Schenkeln den Kern (2) in die Schale satt passend drückt.1. extruder housing with a wear-resistant core and surrounding, in contrast, soft jacket, characterized in that the jacket consists of a U-shaped shell (1) and a lying on the Schenk of the shell cover (3), which is screwed press the core (2) tightly into the shell with the legs.
2. Extrudergehäuse nach Anspruch 1, dadurch gekennzeichnet, daß die U-förmige Schale (1) eine im Querschnitt rechteckige Aufnahme für den hierein passenden Kern (2) bildet.2. Extruder housing according to claim 1, characterized in that the U-shaped shell (1) forms a cross-sectionally rectangular receptacle for the core (2) fitting here.
3. Extrudergehäuse nach Anspruch 1, dadurch gekennzeichnet, daß die U-förmige Schale (18) eine im Querschnitt trapezförmige Aufnahme für den hierein passenden Kern (21) bildet.3. Extruder housing according to claim 1, characterized in that the U-shaped shell (18) forms a trapezoidal receptacle in cross section for the core (21) fitting here.
4. Extrudergehäuse nach Anspruch 1, dadurch gekennzeichnet, daß die U-förmige Schale (25) eine im Querschnitt runde Aufnahme für den hierein passenden Kern (26) bildet.4. Extruder housing according to claim 1, characterized in that the U-shaped shell (25) forms a round cross-section receptacle for the matching core (26).
5. Extrudergehäuse nach einem der Ansprüche 1 bis 4, dadurch ge- kennzeichnet, daß das die beiden Schenkel der U-förmigen Schale verbindende Grundstück mit Bohrungen (14,16) für ein Heiz- oder Kühlmedium versehen ist. 5. Extruder housing according to one of claims 1 to 4, characterized in that the plot connecting the two legs of the U-shaped shell is provided with bores (14, 16) for a heating or cooling medium.
6. Extrudergehäuse nach einem der Ansprüche 1 bis 5, dadurch ge¬ kennzeichnet, daß der Deckel mit Bohrungen (13,15) für ein Heiz¬ oder Kühlmedium versehen ist.6. Extruder housing according to one of claims 1 to 5, characterized ge ¬ indicates that the cover with holes (13,15) is provided for a heating or cooling medium.
7. Extrudergehäuse nach Anspruch 6, dadurch gekennzeichnet, daß die Bohrungen für das Heiz- oder Kühlmedium quer zur Achsrichtung des Extrudeηgehäuses verlaufen.7. Extruder housing according to claim 6, characterized in that the bores for the heating or cooling medium extend transversely to the axial direction of the extruded housing.
8. Extrudergehäuse nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß als Heiz- oder Kühlmedium Luft verwendet wird. 8. Extruder housing according to claim 6 or 7, characterized in that air is used as heating or cooling medium.
PCT/EP1996/004975 1995-11-23 1996-11-13 Extruder housing with wear-resistant core WO1997018940A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29518661.5 1995-11-23
DE29518661U DE29518661U1 (en) 1995-11-23 1995-11-23 Extruder housing with wear-resistant core

Publications (1)

Publication Number Publication Date
WO1997018940A1 true WO1997018940A1 (en) 1997-05-29

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ID=8015875

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/004975 WO1997018940A1 (en) 1995-11-23 1996-11-13 Extruder housing with wear-resistant core

Country Status (2)

Country Link
DE (1) DE29518661U1 (en)
WO (1) WO1997018940A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2444228B1 (en) * 2010-10-22 2017-07-12 Coperion GmbH Multiple screw extruder wit heat insulating housing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1201706A (en) * 1967-12-01 1970-08-12 Schloemann Ag Improvements in casings for double conveyor worms for extruders of synthetic materials
DE2417067A1 (en) * 1973-04-23 1974-11-14 Plast Elastverarbeitungsmasch Heating/cooling jacket for plastics processing - esp for plasticizer cyli-nder of extruder has electrical heater elements and coolant pipes
DE2423785B1 (en) * 1974-05-16 1975-09-11 Werner & Pfleiderer, 7000 Stuttgart Wear insert for the screw housing of a twin screw extruder or injection molding machine
US4385876A (en) * 1978-05-31 1983-05-31 Baker Perkins Inc. Split wear liner for twin bore barrel assembly
EP0147736A2 (en) * 1983-12-30 1985-07-10 Josef A. Blach Section of housing for double screw extruder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1201706A (en) * 1967-12-01 1970-08-12 Schloemann Ag Improvements in casings for double conveyor worms for extruders of synthetic materials
DE2417067A1 (en) * 1973-04-23 1974-11-14 Plast Elastverarbeitungsmasch Heating/cooling jacket for plastics processing - esp for plasticizer cyli-nder of extruder has electrical heater elements and coolant pipes
DE2423785B1 (en) * 1974-05-16 1975-09-11 Werner & Pfleiderer, 7000 Stuttgart Wear insert for the screw housing of a twin screw extruder or injection molding machine
US4385876A (en) * 1978-05-31 1983-05-31 Baker Perkins Inc. Split wear liner for twin bore barrel assembly
EP0147736A2 (en) * 1983-12-30 1985-07-10 Josef A. Blach Section of housing for double screw extruder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2444228B1 (en) * 2010-10-22 2017-07-12 Coperion GmbH Multiple screw extruder wit heat insulating housing

Also Published As

Publication number Publication date
DE29518661U1 (en) 1997-04-10

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