EP0526701A1 - Cooling mixer for powdery or granular plastic material and method for its operation - Google Patents

Cooling mixer for powdery or granular plastic material and method for its operation Download PDF

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Publication number
EP0526701A1
EP0526701A1 EP92108572A EP92108572A EP0526701A1 EP 0526701 A1 EP0526701 A1 EP 0526701A1 EP 92108572 A EP92108572 A EP 92108572A EP 92108572 A EP92108572 A EP 92108572A EP 0526701 A1 EP0526701 A1 EP 0526701A1
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EP
European Patent Office
Prior art keywords
mixing
container
cooling
mixer
rotation
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Granted
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EP92108572A
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German (de)
French (fr)
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EP0526701B1 (en
Inventor
Hans-Joachim Bornemann
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ThyssenKrupp Technologies AG
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Thyssen Industrie AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0724—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis directly mounted on the rotating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners

Definitions

  • the invention relates to a cooling mixer for powdery and granular plastics and other free-flowing material according to the preamble of claim 1.
  • Such mixers are used in particular for cooling plastics processed in heating mixers, in order to avoid a possible and undesirable change in the properties produced by the preparation at high temperatures.
  • Known cooling mixers with mixing tools rotating around a vertical axis of rotation have double-walled containers through which a cooling medium, preferably water, flows when the mixer is operating, the minimum height of which corresponds approximately to their diameter.
  • a cooling medium preferably water
  • the mixing tool In order to use the total surface area of the cooling mixer even approximately for cooling the material to be mixed, the mixing tool is operated at a high peripheral speed, with the result that additional heat is supplied to the mixing chamber due to friction occurring within the material to be mixed and between the material to be mixed and the mixer and the inner region of the tank bottom as a result the centrifugal force acting on the mix only contributes insufficiently to the cooling of the mix.
  • DE-PS 19 56 241 in its shape and its arrangement in the container adapted to the forced circulation of the mixed material double-walled mounting ring allows a uniform contact of the mixed material to this additional cooling surface, but contributes to reducing the friction on the same and for more effective use of the rest Cooling surfaces only insignificantly.
  • the invention is therefore based on the object of designing cooling mixers of the type mentioned at the outset in such a way that better use is made of the cooled surfaces by changing the position of the particles to be mixed more quickly, without supplying the mixing chamber with a considerable amount of frictional heat.
  • the advantages achieved by the invention consist in an intensive, not obstructed by built-in, circulation of the mixed material, which is forced to a primarily vertical circulation by the mixing blades and is thus cooled in addition to the cooling on the container bottom and on the container jacket and also on the container lid. Since there is no need for coolable fittings, the mixer can be cleaned and a worn mixing tool can be replaced easily.
  • an embodiment of the invention is provided according to claim 4, since it has been shown that contrary to the peripheral speed of 5.5 to 6.5 m / sec, which is considered necessary for good circulation of the mixture. a much lower one of about 1 to 3 m / sec. the cooling capacity transferred from the cooling surfaces to the mix is not reduced.
  • the cylindrical housing 1 of the cooling mixer shown in vertical section in FIG. 1 is fastened on a base frame 2 and closed with a cover 3 with a double wall and provided with coolant connections. It is double-walled, provided with coolant connections and accommodates the mixing tool 4, which is arranged centrally and rotates around a vertical axis of rotation.
  • the mixing blades 6, 7 are rigidly connected to the hub 5 of the mixing tool 4, the arrangement of which relative to one another is clear from FIG. 2.
  • the mixing blades 6 have an approximately constant curvature as seen from the moving material over their entire length. They are mounted tilted relative to the hub axis by an angle of approx. 45 in the direction of rotation of the mixing tool 4 (FIG.
  • the sections 7a of the mixing blades 7, which are designed as flat sheets, are also tilted on the hub 5, analogously to the mixing blades 6 (FIG. 4).
  • the vertically arranged wipers 7b connected to the sections 7a extend in the immediate vicinity of the bottom, the wall and the lid of the container and form an angle of approximately 45 ° with the sections 7a in plan view.
  • the cooling mixer is filled with material to be mixed to 50 to 90% of the usable volume of the mixing chamber via the loading opening located in the middle of the cover 3.
  • the housing 1 and the cover 3 are flowed through by cooling water.
  • the mixing tool 4 is rotated at a peripheral speed of approximately 1 m / sec. operated. At this peripheral speed, which is low compared to known peripheral speeds, the mixing material is circulated from the inside to the outside and vice versa as a result of the corresponding mixing wing design and in the vertical direction.
  • the material to be mixed is removed from the mixer at the emptying opening 8 located in the bottom of the container in the area of the scrapers 7b.

Abstract

In a known cooling mixer for powdered or granular plastics, which comprises a cylindrical, double-walled container jacket (1) through which a coolant flows, and a cover (3), which closes the mixer during operation and in which mixing tools (4) are arranged which revolve about a vertical axis of rotation, so as to improve the cooling effect, the cover (3) is constructed with double walls and has a coolant flowing through it during operation of the mixer. Furthermore, the mixer, relative to its diameter, has only a small height, so that, owing to special design of the mixing tools (4, 5, 6, 7a, 7b) the material to be mixed is forced to rise and is brought into contact with the cooled cover (3). As this does not rely on the effect of centrifugal force, it is possible to operate the mixer at a relatively low peripheral speed of the mixing tools (4, 5, 6, 7a, 7b). <IMAGE>

Description

Die Erfindung betrifft einen Kühlmischer für pulver- und granulatförmige Kunststoffe und anderes rieselfähiges Gut nach dem Oberbegriff des Anspruchs 1.The invention relates to a cooling mixer for powdery and granular plastics and other free-flowing material according to the preamble of claim 1.

Derartige Mischer werden insbesondere zur Abkühlung von in Heizmischern aufbereiteten Kunststoffen verwendet, um eine bei hohen Temperaturen mögliche und unerwünschte Änderung der über die Aufbereitung erzeugten Eigenschaften zu vermeiden.Such mixers are used in particular for cooling plastics processed in heating mixers, in order to avoid a possible and undesirable change in the properties produced by the preparation at high temperatures.

Bekannte Kühlmischer mit um eine vertikale Drehachse umlaufenden Mischwerkzeugen weisen doppelwandig ausgebildete, bei Betrieb des Mischers von einem Kühlmedium, vorzugsweise Wasser, durchflossene Behälter auf, deren Minimalhöhe etwa ihrem Durchmesser entspricht.Known cooling mixers with mixing tools rotating around a vertical axis of rotation have double-walled containers through which a cooling medium, preferably water, flows when the mixer is operating, the minimum height of which corresponds approximately to their diameter.

Um die Gesamtmantelfläche des Kühlmischers auch nur annähernd für die Kühlung des Mischgutes zu nutzen, wird das Mischwerkzeug mit einer hohen Umfangsgeschwindigkeit betrieben, womit der Mischkammer durch innerhalb des Mischgutes und zwischen Mischgut und Mischer auftretender Reibung zusätzlich Wärme zugeführt wird und der innere Bereich des Behälterbodens infolge der auf das Mischgut wirkenden Zentrifugalkraft nur ungenügend zur Kühlung des Mischgutes beiträgt.In order to use the total surface area of the cooling mixer even approximately for cooling the material to be mixed, the mixing tool is operated at a high peripheral speed, with the result that additional heat is supplied to the mixing chamber due to friction occurring within the material to be mixed and between the material to be mixed and the mixer and the inner region of the tank bottom as a result the centrifugal force acting on the mix only contributes insufficiently to the cooling of the mix.

Auch ist bekannt, zur Vergrößerung der Kühlfläche kühlbare Einbauten im Behälterinneren vorzusehen.It is also known to provide coolable internals in the interior of the container in order to enlarge the cooling surface.

Derartige Einbauten behindern den durch die Mischwerkzeuge verursachten Zwangsumlauf des Mischgutes, was zu einem verlangsamten Positionswechsel der Partikel des Mischgutes und damit zu einer ungenügenden Ausnutzung der Kühlflächen, insbesondere des Behältermantels, führt. Durch die Reibung des Mischgutes an den Einbauten wird in der Mischkammer zusätzlich Wärme erzeugt.Such internals hinder the forced circulation of the mixed material caused by the mixing tools, which leads to a slower change of position of the particles of the mixed material and thus to insufficient use of the cooling surfaces, in particular the container shell. The friction of the mix on the internals generates additional heat in the mixing chamber.

Der nach der DE-PS 19 56 241 in seiner Form und seiner Anordnung im Behälter dem Zwangsumlauf des Mischgutes angepaßte doppelwandige Einbauring ermöglicht zwar einen gleichmäßigen Kontakt des Mischgutes zu dieser zusätzlichen Kühlfläche, trägt aber zur Verminderung der Reibung an derselben und zur effektiveren Ausnutzung der übrigen Kühlflächen nur unwesentlich bei.According to DE-PS 19 56 241 in its shape and its arrangement in the container adapted to the forced circulation of the mixed material double-walled mounting ring allows a uniform contact of the mixed material to this additional cooling surface, but contributes to reducing the friction on the same and for more effective use of the rest Cooling surfaces only insignificantly.

Von daher liegt der Erfindung die Aufgabe zugrunde, Kühlmischer der eingangs genannten Art derart auszubilden, daß eine bessere Ausnutzung der gekühlten Flächen durch einen schnelleren Positionswechsel der zu mischenden Partikel erfolgt, ohne dabei der Mischkammer einen erheblichen Anteil an Reibungswärme zuzuführen.The invention is therefore based on the object of designing cooling mixers of the type mentioned at the outset in such a way that better use is made of the cooled surfaces by changing the position of the particles to be mixed more quickly, without supplying the mixing chamber with a considerable amount of frictional heat.

Diese Aufgabe wird bei einem gattungsgemäßen Kühlmischer durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved in a generic cooling mixer by the characterizing features of claim 1.

Die mit der Erfindung erzielten Vorteile bestehen in einer intensiven, nicht von Einbauten behinderten, Umwälzung des Mischgutes, das durch die Mischflügel zu einem vorrangig vertikalen Umlauf gezwungen und somit neben der Kühlung am Behälterboden und am Behältermantel auch am Behälterdeckel gekühlt wird. Da kühlbare Einbauten entfallen, ist eine Reinigung des Mischers und der Austausch eines verschlissenen Mischwerkzeuges leicht möglich.The advantages achieved by the invention consist in an intensive, not obstructed by built-in, circulation of the mixed material, which is forced to a primarily vertical circulation by the mixing blades and is thus cooled in addition to the cooling on the container bottom and on the container jacket and also on the container lid. Since there is no need for coolable fittings, the mixer can be cleaned and a worn mixing tool can be replaced easily.

Zur Verbesserung der Kühlleistung durch einen intensiveren Positionswechsel der Partikel des Mischgutes in radialer Richtung ist eine Ausgestaltung der Erfindung nach den Merkmalen der Ansprüche 2 und 3 vorgesehen.To improve the cooling performance by a more intensive change of position of the particles of the material to be mixed in the radial direction, an embodiment of the invention according to the features of claims 2 and 3 is provided.

Zur Verringerung der der Mischkammer zugeführten Reibungswärme ist eine Ausgestaltung der Erfindung nach Anspruch 4 vorgesehen, da sich gezeigt hat, daß entgegen der für einen guten Mischgutumlauf als notwendig erachteten Umfangsgeschwindigkeit von 5,5 bis 6,5 m/sec. eine wesentlich geringere von etwa 1 bis 3 m/sec. die von den Kühlflächen auf das Mischgut übertragene Kühlleistung nicht vermindert.In order to reduce the frictional heat supplied to the mixing chamber, an embodiment of the invention is provided according to claim 4, since it has been shown that contrary to the peripheral speed of 5.5 to 6.5 m / sec, which is considered necessary for good circulation of the mixture. a much lower one of about 1 to 3 m / sec. the cooling capacity transferred from the cooling surfaces to the mix is not reduced.

Da die hierbei den Partikeln des Mischgutes beim Mischen erteilten Beschleunigungen gering sind, erfolgt der Kühlvorgang äußerst materialschonend. Es kommt weder zu einem Verkleben der Partikel untereinander, noch zu einem Anhaften dieser an Teilen des Mischers.Since the accelerations given to the particles of the material to be mixed during mixing are low, the cooling process is extremely gentle on the material. The particles do not stick to one another, nor do they adhere to parts of the mixer.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing and will be described in more detail below.

Es zeigen

  • Fig. 1 einen Vertikalschnitt eines Kühlmischers,
  • Fig. 2 eine Draufsicht des Mischers bei geöffnetem Deckel,
  • Fig. 3 einen Schnitt der nach außen fördernden Mischflügel an der Linie A-A',
  • Fig. 4 einen Schnitt der nach innen fördernden Mischflügel an der Linie B-B'.
Show it
  • 1 is a vertical section of a cooling mixer,
  • 2 is a plan view of the mixer with the lid open,
  • 3 shows a section of the outward-conveying mixing blades on the line A-A ',
  • Fig. 4 shows a section of the inwardly conveying mixing blades on the line B-B '.

Das zylindrische Gehäuse 1 des in Fig. 1 im Vertikalschnitt dargestellten Kühlmischers ist auf einem Grundrahmen 2 befestigt und mit einem doppelwandig ausgebildeten, mit Kühlmittelanschlüssen versehenen Deckel 3 verschlossen. Es ist doppelwandig ausgeführt, mit Kühlmittelanschlüssen versehen und nimmt das zentrisch angeordnete, um eine vertikale Drehachse umlaufende Mischwerkzeug 4 auf. Mit der Nabe 5 des Mischwerkzeuges 4 sind die Mischflügel 6,7 starr verbunden, deren Anordnung zueinander aus Fig. 2 deutlich wird. Die Mischflügel 6 weisen über ihre gesamte Länge eine etwa konstante, vom bewegten Gut aus gesehen konvexe Krümmung auf. Sie sind gegenüber der Nabenachse um einen Winkel von ca. 45 in Drehrichtung des Mischwerkzeuges 4 gekippt angebracht (Fig. 3), so daß die Mischflügel 6 das Mischgut zum Aufsteigen zwingen und es zu einer gleichmäßigen Deckelberührung führen. Auch die als ebene Bleche ausgebildeten Abschnitte 7a der Mischflügel 7 sind analog den Mischflügeln 6 gekippt an der Nabe 5 angeordnet (Fig. 4). Die mit den Abschnitten 7a verbundenen vertikal angeordneten Abstreifer 7b erstrecken sich bis in unmittelbare Nähe des Bodens, der Wand und des Deckels des Behälters und bilden in der Draufsicht mit den Abschnitten 7a einen Winkel von ca. 45 ° .The cylindrical housing 1 of the cooling mixer shown in vertical section in FIG. 1 is fastened on a base frame 2 and closed with a cover 3 with a double wall and provided with coolant connections. It is double-walled, provided with coolant connections and accommodates the mixing tool 4, which is arranged centrally and rotates around a vertical axis of rotation. The mixing blades 6, 7 are rigidly connected to the hub 5 of the mixing tool 4, the arrangement of which relative to one another is clear from FIG. 2. The mixing blades 6 have an approximately constant curvature as seen from the moving material over their entire length. They are mounted tilted relative to the hub axis by an angle of approx. 45 in the direction of rotation of the mixing tool 4 (FIG. 3), so that the mixing blades 6 force the mix to rise and lead to an even contact with the lid. The sections 7a of the mixing blades 7, which are designed as flat sheets, are also tilted on the hub 5, analogously to the mixing blades 6 (FIG. 4). The vertically arranged wipers 7b connected to the sections 7a extend in the immediate vicinity of the bottom, the wall and the lid of the container and form an angle of approximately 45 ° with the sections 7a in plan view.

Für einen gleichmäßigen Kontakt des Mischgutes mit den gekühlten Flächen ist es bei einem Mischervolumen von etwa 1150 I vorteilhaft, ein Verhältnis des Behälterdurchmessers zu dessen Höhe von ca. 7 : 1 einzuhalten.For a uniform contact of the mix with the cooled surfaces, it is advantageous with a mixer volume of approximately 1150 l to maintain a ratio of the container diameter to its height of approximately 7: 1.

Zur Kühlung des Mischgutes wird der Kühlmischer über die in der Mitte des Deckels 3 befindliche Beschickungsöffnung mit Mischgut zu 50 bis 90% des nutzbaren Volumens der Mischkammer gefüllt.To cool the material to be mixed, the cooling mixer is filled with material to be mixed to 50 to 90% of the usable volume of the mixing chamber via the loading opening located in the middle of the cover 3.

Das Gehäuse 1 und der Deckel 3 sind von Kühlwasser durchflossen. Zur Umwälzung des Mischgutes wird das Mischwerkzeug 4 mit einer Umfangsgeschwindigkeit von ca. 1 m/sec. betrieben. Bei dieser gegenüber bekannten Umfangsgeschwindigkeiten niedrigen Umfangsgeschwindigkeit erfolgt die Umwälzung des Mischgutes infolge der entsprechenden Mischflügelgestaltung von innen nach außen und umgekehrt und in vertikaler Richtung. Nach Abschluß des Kühlprozesses wird das Mischgut an der im Behälterboden im Bereich der Abstreifer 7b befindlichen Entleerungsöffnung 8 dem Mischer entnommen.The housing 1 and the cover 3 are flowed through by cooling water. To circulate the material to be mixed, the mixing tool 4 is rotated at a peripheral speed of approximately 1 m / sec. operated. At this peripheral speed, which is low compared to known peripheral speeds, the mixing material is circulated from the inside to the outside and vice versa as a result of the corresponding mixing wing design and in the vertical direction. After the cooling process is complete, the material to be mixed is removed from the mixer at the emptying opening 8 located in the bottom of the container in the area of the scrapers 7b.

Unterschreitet der Füllungsgrad 50 % des nutzbaren Volumens der Mischkammer, ist es für eine gute Durchmischung des Mischgutes zweckmäßig, eine größere Anzahl Mischflügelpaare vorzusehen.If the degree of filling falls below 50% of the usable volume of the mixing chamber, it is advisable for a good mixing of the material to be mixed to provide a larger number of pairs of mixing blades.

Claims (4)

1. Kühlmischer für pulver- oder granulatförmige Kunststoffe und anderes rieselfähiges Gut, bestehend aus einem zylindrischen, doppelwandigen, mindestens eine Entleerungsöffnung aufweisenden Behälter, einem im Behälter zentrisch angeordneten, umlaufenden Mischwerkzeug, das aus einer Nabe und an dieser starr befestigten Mischflügeln gebildet ist und dessen vertikale Drehachse mit der Behälterachse zusammenfällt, einem, mit dem Behälter über Kühlmittelanschlüsse verbundenen Kühlkreislauf, dessen Kühlmedium die doppelwandigen Bereiche des Behälters bei Betrieb des Kühlmischers durchfließt,und einem den Behälter im Betriebszustand verschliessenden, mindestens eine Beschickungsöffnung aufweisenden Deckel, dadurch gekennzeichnet, daß der zylindrische Behälter, bezogen auf seinen Durchmesser, nur eine geringe Höhe aufweist, die Mischflügel (6,7) des Mischwerkzeuges (4) zur Vertikalablenkung des zu kühlenden Gutes mit den sich in Drehrichtung des Mischwerkzeuges (4) vor den Mischflügeln (6,7) befindlichen Bereichen des Behälterbodens einen stumpfen Winkel bilden und der Deckel (3) doppelwandig ausgebildet, mit Kühlmittelanschlüssen versehen und bei Betrieb des Kühlmischers von einem Kühlmedium durchflossen ist.1. Cooling mixer for powdered or granular plastics and other free-flowing material, consisting of a cylindrical, double-walled container with at least one discharge opening, a rotating mixing tool arranged centrally in the container, which is formed from a hub and mixing blades rigidly attached to the latter, and the like vertical axis of rotation coincides with the container axis, a cooling circuit connected to the container via coolant connections, the cooling medium of which flows through the double-walled regions of the container when the cooling mixer is in operation, and a cover which closes the container in the operating state and has at least one loading opening, characterized in that the cylindrical Container, based on its diameter, has only a small height, the mixing blades (6,7) of the mixing tool (4) for vertical deflection of the goods to be cooled with the in the direction of rotation of the mixing tool (4) vo r areas of the tank bottom located at the mixing blades (6, 7) form an obtuse angle and the cover (3) is double-walled, provided with coolant connections and a cooling medium flows through during operation of the cooling mixer. 2. Kühlmischer nach Anspruch 1, dadurch gekennzeichnet, daß ein oder mehrere Mischflügel (7), bezogen auf eine Draufsicht des Mischers bei geöffnetem Deckel (3) zumindest in ihren äußeren Bereichen von einem annähernd radialen, in einen in Drehrichtung des Mischwerkzeuges (4) von der radialen Richtung erheblich abweichenden Verlauf übergehen und ein oder mehrere weitere Mischflügel (6) bei gleicher Betrachtungsweise erheblich von einem radialen Verlauf entgegengesetzt der Drehrichtung des Mischwerkzeuges (4) abweichen, wobei benachbarte Mischflügel (6,7) jeweils einen unterschiedlich von der Radialrichtung abweichenden Verlauf aufweisen.2. Cooling mixer according to claim 1, characterized in that one or more mixing blades (7), based on a top view of the mixer when the cover (3) is open, at least in its outer regions from an approximately radial, in a in the direction of rotation of the mixing tool (4) change from the radial direction to a significantly different profile and one or more additional mixing blades (6) differ significantly from the same perspective from a radial profile opposite to the direction of rotation of the mixing tool (4), whereby adjacent mixing blades (6,7) each differ from the radial direction Show course. 3. Kühlmischer nach Anspruch 2, dadurch gekennzeichnet, daß die in Drehrichtung des Mischwerkzeuges (4) vom radialen Verlauf abweichenden Mischflügel (7) an ihren äußeren Enden als bis in unmittelbare Nähe des Behältermantels und des äußeren Bereiches des Deckels (3) reichende Abstreifer (7b) für das Kühlgut ausgebildet sind.3. Cooling mixer according to claim 2, characterized in that the in the direction of rotation of the mixing tool (4) deviating from the radial course mixing blades (7) at their outer ends as in the immediate vicinity of the container shell and the outer region of the lid (3) reaching scraper ( 7b) are designed for the refrigerated goods. 4. Verfahren zum Betrieb eines Kühlmischers nach den Ansprüchen 1,2 oder 3, dadurch gekennzeichnet, daß das Mischwerkzeug (4) mit einer niedrigen, im Kühlgut eine vernachlässigbar geringe Zentrifugalkraft erzeugenden, Umfangsgeschwindigkeit umläuft.4. A method of operating a cooling mixer according to claims 1, 2 or 3, characterized in that the mixing tool (4) rotates with a low circumferential speed which generates a negligibly low centrifugal force in the refrigerated goods.
EP92108572A 1991-06-10 1992-05-21 Cooling mixer for powdery or granular plastic material and method for its operation Expired - Lifetime EP0526701B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4119033 1991-06-10
DE4119033A DE4119033C2 (en) 1991-06-10 1991-06-10 Cooling mixer for powder or granular plastics

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EP0526701A1 true EP0526701A1 (en) 1993-02-10
EP0526701B1 EP0526701B1 (en) 1994-12-28

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JP (1) JP2504664B2 (en)
DE (2) DE4119033C2 (en)
ES (1) ES2066516T3 (en)

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CN101811331B (en) * 2010-02-22 2011-11-30 湖南振辉管业有限公司 Full-automatic plastic mixer

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DE102012208717A1 (en) 2012-05-24 2013-11-28 Coperion Gmbh Weighing/mixing-handling device for e.g. throughmixing of plastic granulates and additives into polymer mixture, has weighing device weighing bulk materials, and gas supply nozzles introducing mixed gas into interior for mixing materials
CN112720899B (en) * 2020-12-31 2022-04-19 浙江绿净环保科技股份有限公司 High-efficient compounding equipment of polytetrafluoroethylene powder

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101811331B (en) * 2010-02-22 2011-11-30 湖南振辉管业有限公司 Full-automatic plastic mixer

Also Published As

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DE4119033A1 (en) 1992-12-24
ES2066516T3 (en) 1995-03-01
DE59201081D1 (en) 1995-02-09
DE4119033C2 (en) 1994-04-21
EP0526701B1 (en) 1994-12-28
JPH06155454A (en) 1994-06-03
JP2504664B2 (en) 1996-06-05

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