EP0723479A1 - Pulverizing mill - Google Patents

Pulverizing mill

Info

Publication number
EP0723479A1
EP0723479A1 EP94927645A EP94927645A EP0723479A1 EP 0723479 A1 EP0723479 A1 EP 0723479A1 EP 94927645 A EP94927645 A EP 94927645A EP 94927645 A EP94927645 A EP 94927645A EP 0723479 A1 EP0723479 A1 EP 0723479A1
Authority
EP
European Patent Office
Prior art keywords
roller
shredding
drive
cover plate
comminution
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.)
Withdrawn
Application number
EP94927645A
Other languages
German (de)
French (fr)
Inventor
Peter Rössler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weima Apparatebau GmbH
Original Assignee
Weima Apparatebau GmbH
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 Weima Apparatebau GmbH filed Critical Weima Apparatebau GmbH
Publication of EP0723479A1 publication Critical patent/EP0723479A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/22—Feed or discharge means
    • B02C18/2225—Feed means
    • B02C18/2233—Feed means of ram or pusher type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

Definitions

  • the invention relates to a shredding plant according to the preamble of claim 1.
  • Such crushing plants e.g. are described in DE 90 03 477 U, are widely used in practice for shredding residual wood. With them, the comminution roller is driven by the roller drive via a reduction gear at typically 80 rpm. These shredding tools are characterized by good uniformity of the shredded material and low noise. However, they are only of limited use for plastic waste.
  • the present invention is intended to further develop a comminution plant according to the preamble of claim 1 in such a way that it is also suitable for use with plastic waste and other viscous waste materials.
  • the shredding unit according to the invention runs at a high rotational speed of the shredding roller of the order of magnitude of 200 to 1000 rpm compared to the known shredding units.
  • the shredding roller whose knife bodies in practice are long strips that work with strip-shaped counter knives, would no longer start if only a larger one Waste piece when the shredding roller slowly runs out when the machine was switched off beforehand would have moved between a knife body and a counter knife.
  • the single figure shows a schematic vertical longitudinal central section through a comminution plant particularly suitable for plastic waste, in which various drives and an associated control unit are also shown schematically.
  • the shredding unit shown in the drawing has a housing, designated overall by 10, which is welded together from thick, suitably canted sheet steel parts.
  • a comminution roller On the side walls 12 of the housing, a comminution roller, denoted overall by 14, is mounted via bearings which are not reproduced. This carries strip-shaped knife bodies 16, 18 which cooperate with counter strips 19, 20 which are also fixed to the housing.
  • a cover plate 22 is guided on a path on the housing 10, which leads obliquely downwards from an end wall 24 of the housing on the left in the drawing over the comminution roller 14 to a step 26 in a bottom wall 28 of the housing.
  • the guide of the cover plate 22 is provided at its lateral edges with lower guide strips 30 and upper guide strips 32 which are welded to the side walls 12.
  • the underside of the cover plate 22 carries at its lateral edges a rack 34 with which a pinion 36 meshes.
  • the two pinions 36 are rigidly coupled by a shaft 38, on which a cover drive 40 attacks.
  • the current position of the cover plate 22 is determined by a position transmitter 42, which is also mechanically coupled to the shaft 38. Instead, a plurality of limit switches distributed along the path of the cover plate 22 can also be used.
  • a feed slide 44 can be moved, which is designed as a hollow box part. Its upper side cooperates with a protective wall 46, which is connected to a wall 48 of the housing, which is opposite the cover plate 40 and is positioned in the opposite, opposite position.
  • the side walls of the feed slide 44 run in front of the side walls 12 with little play.
  • An end wall 50 of the housing 10 adjoining the upper end of the wall 48 forms the last part of the enclosure of a storage space 52, in which the material to be shredded is placed.
  • the feed slide is shown in a fully retracted rest position, in which it is completely under the protective wall 46.
  • a corresponding double-action hydraulic working cylinder 54 with a corresponding stroke is provided for moving the feed slide 44 towards the comminution roller 14 (and back again into the rest position).
  • a partially cylindrical perforated screen 56 is arranged between the counter knives 19, 20 and lies outside the path of the tips of the knife bodies 16, 18 shown in dashed lines. Sloping lower hopper walls 58, 60 guide the chips falling through the perforated screen 56 down to a collecting channel 62 in which a conveyor screw 64 runs.
  • a worm drive 66 is assigned to this.
  • a roller drive 68 is provided for rotating the shredding roller 14 and, like the cover drive 40, the working cylinder 54 and the worm drive 66, is excited by a central control unit 70 of the shredding unit.
  • the control unit 70 operates as a function of the output signal of the position transmitter 42 and of a power meter 72 which is connected to the supply line of the roller drive 68.
  • the control unit 70 works according to the following criteria:
  • the cover drive 40 is first excited in the closing direction of the cover plate 22.
  • the roller drive 68 continues to be excited until the cover plate 22 has reached its full closed position shown in the drawing. Only then is the roller drive 68 switched off.
  • the cover plate initially remains in its closed position until the shredding roller has reached a predetermined minimum speed. Only then is the cover plate opened.
  • the pressure medium supply to the working cylinder 54 is interrupted or switched in the direction of retracting the piston rod of the working cylinder 54 when the power consumption of the roller drive 68 is determined to be too high.
  • the cover drive 40 is energized in the direction of closing the cover plate 22 when the measured power consumption of the roller drive 68 exceeds a predetermined threshold.
  • the cover drive 40 is excited in the direction of an enlargement of the opening between the free edge of the cover plate 22 and the shoulder of the bottom wall 28 when the measured power of the roller drive 68 falls below a predetermined threshold.
  • the working cylinder 54 is excited in the direction of an extension of the feed slide 44 when the measured power of the roller drive 68 falls below a predetermined threshold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Scissors And Nippers (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A pulverizing mill designed especially for waste products made of plastic is equipped with a pulverizing cylinder (14) situated under a downward slanted cover plate (22) by means of which the connection between the pulverizing cylinder (14) and a hopper (52) containing the material to be pulverized can be alternatively opened and closed. When the pulverizing mill is switched off, a control unit (70) continues to energize a cylinder drive (68) until the cover plate has been moved into its closed position. This ensures that the pulverizing cylinder (14) can be restarted, even though the cylinder drive (68) is set to run the pulverizing cylinder at high speeds of preferably 200 to 1000 rpm, as is advantageous for plastic waste products.

Description

Zerkleinerungswerk Shredding plant
Die Erfindung betrifft ein Zerkleinerungswerk gemäß dem Oberbegriff des Anspruches 1.The invention relates to a shredding plant according to the preamble of claim 1.
Derartige Zerkleinerungswerke, wie sie z.B. in der DE 90 03 477 U beschrieben sind, finden in der Praxis zum Zerkleinern von Restholz verbreitet Verwendung. Bei ihnen wird die Zerkleinerungswalze über ein Untersetzergetriebe vom Walzenantrieb her mit typischerweise 80 U/min ange¬ trieben. Diese Zerkleinerungswerkzeuge zeichnen sich durch gute Gleichförmigkeit des zerkleinerten Gutes und geringe Geräuschentwicklung aus. Sie eignen sich jedoch nur beschränkt zur Verwendung mit Kunststoff-Abfallstoffen.Such crushing plants, e.g. are described in DE 90 03 477 U, are widely used in practice for shredding residual wood. With them, the comminution roller is driven by the roller drive via a reduction gear at typically 80 rpm. These shredding tools are characterized by good uniformity of the shredded material and low noise. However, they are only of limited use for plastic waste.
Durch die vorliegende Erfindung soll ein Zerkleinerungs¬ werk gemäß dem Oberbegriff des Anspruches 1 so weiterge- bildet werden, daß es auch für die Verwendung mit Kunst¬ stoff-Abfällen und anderen zähen Abfallstoffen gut geeig¬ net ist.The present invention is intended to further develop a comminution plant according to the preamble of claim 1 in such a way that it is also suitable for use with plastic waste and other viscous waste materials.
Diese Aufgabe ist erfindungsgemäß gelöst durch ein Zer- kleinerungswerk mit den im Anspruch 1 angegebenen Merk¬ malen.This object is achieved according to the invention by a shredding unit with the features specified in claim 1.
Das erfindungsgemäße Zerkleinerungswerk läuft mit einer verglichen mit dem bekannten Zerkleinerungswerken hohen Drehzahl der Zerkleinerungswalze von größenordnungmäßig 200 bis 1000 U/min. Bei einer derartigen Auslegung des Walzenantriebes würde die Zerkleinerungswalze, deren Messerkörper in der Praxis lange Leisten sind, die mit ebenfalls leistenförmigen Gegenmessern zusammenarbeiten, schon dann nicht mehr anlaufen, wenn sich nur ein größeres Abfallstück beim langsamen Auslaufen der Zerkleinerungs¬ walze beim vorhergehenden Ausschalten der Maschine zwi¬ schen einem Messerkörper und ein Gegenmesser bewegt hätte. Derartige Betriebszustände sind bei dem erfindungsgemäßen Zerkleinerungswerk vermieden, da über der Zerkleinerungs¬ walze eine Abdeckplatte vorgesehen ist, welche durch die Steuereinheit des Zerkleinerungswerkes zwangsweise zunächst in eine die Zerkleinerungswalze vollständig gegen den Zerkleinerungsgut-Vorratsraum abdeckende Schließstellung bewegt wird, bevor die Zerkleinerungswalze angehalten wird.The shredding unit according to the invention runs at a high rotational speed of the shredding roller of the order of magnitude of 200 to 1000 rpm compared to the known shredding units. With such a design of the roller drive, the shredding roller, whose knife bodies in practice are long strips that work with strip-shaped counter knives, would no longer start if only a larger one Waste piece when the shredding roller slowly runs out when the machine was switched off beforehand would have moved between a knife body and a counter knife. Such operating states are avoided in the shredding unit according to the invention, since a cover plate is provided above the shredding roller, which cover plate is forcibly moved by the control unit of the shredding unit first into a closed position that completely covers the shredding roller before the shredding roller is stopped before the shredding roller is stopped.
Vorteilhafte Weiterbildungen der Erfindung sind in Unter¬ ansprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.
Mit der Weiterbildung der Erfindung gemäß den Ansprüchen 2 bis 4 werden die Belastungen der Zerkleinerungswalze auch im laufenden Betrieb im wesentlichen konstantgehalten.With the development of the invention according to claims 2 to 4, the loads on the comminution roller are kept substantially constant even during operation.
Bei einem Zerkleinerungswerk gemäß Anspruch 5 bilden die¬ jenigen Teile der Abdeckplatte, welche sich jeweils über der Zerkleinerungswalze befinden, eine zum Messereingriffs¬ bereich hinführende Rutschfläche.In a shredding unit according to claim 5, those parts of the cover plate, which are each located above the shredding roller, form a sliding surface leading to the knife engagement area.
Die Weiterbildung der Erfindung gemäß Anspruch 6 ist im Hinblick auf ein verkantungsfreies und damit klemmfreies Bewegen auch große seitliche Abmessungen aufweisender Abdeckplatten unter der Last aufruhenden Zerkleinerungs¬ gutes von Vorteil.The development of the invention according to claim 6 is advantageous with regard to a tilt-free and thus jamming-free movement even of large lateral dimensions of cover plates under the load of crushing material.
Mit der Weiterbildung der Erfindung gemäß Anspruch 7 wird ein besonderes günstiges Zuführen des Zerkleinerungsgutes zum ersten Messereingriffsbereich gewährleistet.With the development of the invention according to claim 7, a particularly favorable feeding of the comminution material to the first knife engagement area is ensured.
Nachstehend wird die Erfindung anhand eines Ausführungs- beispieles unter Bezugnahme auf die Zeichnung näher erläu¬ tert.The invention is explained below using an embodiment example with reference to the drawing, in more detail.
In dieser zeigt die einzige Figur einen schematischen vertikalen Längsmittelschnitt durch ein insbesondere für Kunststoff-Abfälle geeignetes Zerkleinerungswerk, in welchem zusätzlich verschiedene Antriebe sowie eine zugehörige Steuereinheit schematisch wiedergegeben sind.In this, the single figure shows a schematic vertical longitudinal central section through a comminution plant particularly suitable for plastic waste, in which various drives and an associated control unit are also shown schematically.
Das in der Zeichnung wiedergegebene Zerkleinerungswerk hat ein insgesamt mit 10 bezeichnetes Gehäuse, welches aus dicken, geeignet gekanteten Stahlblechteilen zusammen¬ geschweißt ist.The shredding unit shown in the drawing has a housing, designated overall by 10, which is welded together from thick, suitably canted sheet steel parts.
An Seitenwänden 12 des Gehäuses ist über nicht wiederge¬ gebene Lager eine insgesamt mit 14 bezeichnete Zerkleine¬ rungswalze gelagert. Diese trägt leistenförmige Messer¬ körper 16, 18, die mit ebenfalls leistenförmigen gehäuse¬ festen Gegenmessern 19, 20 zusammenarbeiten.On the side walls 12 of the housing, a comminution roller, denoted overall by 14, is mounted via bearings which are not reproduced. This carries strip-shaped knife bodies 16, 18 which cooperate with counter strips 19, 20 which are also fixed to the housing.
Über der Zerkleinerungswalze 14 ist eine Abdeckplatte 22 auf einem Weg am Gehäuse 10 geführt, der von einer in der Zeichnung links gelegenen Endwand 24 des Gehäuses über die Zerkleinerungswalze 14 hinweg schräg nach unten zu einer Stufe 26 in einer Bodenwand 28 des Gehäuses führt.Above the comminution roller 14, a cover plate 22 is guided on a path on the housing 10, which leads obliquely downwards from an end wall 24 of the housing on the left in the drawing over the comminution roller 14 to a step 26 in a bottom wall 28 of the housing.
Die Führung der Abdeckplatte 22 besorgen bei ihren seit¬ lichen Rändern vorgesehene untere Führungsleisten 30 sowie obere Führungsleisten 32, die an den Seitenwänden 12 fest- geschweißt sind.The guide of the cover plate 22 is provided at its lateral edges with lower guide strips 30 and upper guide strips 32 which are welded to the side walls 12.
Die Unterseite der Abdeckplatte 22 trägt bei ihren seit¬ lichen Rändern jeweils eine Zahnstange 34, mit welcher ein Ritzel 36 kämmt. Die beiden Ritzel 36 sind durch eine Welle 38 starr gekoppelt, an welcher ein Abdeckantrieb 40 angreift. Die momentane Stellung der Abdeckplatte 22 wird durch einen Stellungsgeber 42 ermittelt, der eben¬ falls mit der Welle 38 mechanisch gekoppelt ist. Statt dessen können auch mehrere längs des Weges der Abdeck- platte 22 verteilte Endschalter verwendet werden.The underside of the cover plate 22 carries at its lateral edges a rack 34 with which a pinion 36 meshes. The two pinions 36 are rigidly coupled by a shaft 38, on which a cover drive 40 attacks. The current position of the cover plate 22 is determined by a position transmitter 42, which is also mechanically coupled to the shaft 38. Instead, a plurality of limit switches distributed along the path of the cover plate 22 can also be used.
Über der Bodenwand 28 ist ein Zustellschieber 44 verschieb¬ bar, der als hohles Kastenteil ausgebildet ist. Seine Oberseite arbeitet mit einer Schutzwand 46 zusammen, die an eine der Abdeckplatte 40 gegenüberliegende, entgegen¬ gesetzt gleich angestellte Wand 48 des Gehäuses angeschlos¬ sen ist. Die seitlichen Wände des Zustellschiebers 44 laufen unter kleinem Spiel vor den Seitenwänden 12.Above the bottom wall 28, a feed slide 44 can be moved, which is designed as a hollow box part. Its upper side cooperates with a protective wall 46, which is connected to a wall 48 of the housing, which is opposite the cover plate 40 and is positioned in the opposite, opposite position. The side walls of the feed slide 44 run in front of the side walls 12 with little play.
Eine sich an das obere Ende der Wand 48 anschließende Endwand 50 des Gehäuses 10 bildet den letzten Teil der Umfassung eines Vorratsraumes 52, in welchen das zu zer¬ kleinernde Gut gegeben wird.An end wall 50 of the housing 10 adjoining the upper end of the wall 48 forms the last part of the enclosure of a storage space 52, in which the material to be shredded is placed.
In der Zeichnung ist der Zustellschieber in einer voll zurückgefahrenen Ruhestellung wiedergegeben, in welcher er vollständig unter der Schutzwand 46 steht. Zum Bewegen des Zustellschiebers 44 auf die Zerkleinerungswalze 14 zu (und wieder zurück in die Ruhestellung) ist ein ent- sprechenden Hub aufweisender doppeltwirkender hydrauli¬ scher ArbeitsZylinder 54 vorgesehen.In the drawing, the feed slide is shown in a fully retracted rest position, in which it is completely under the protective wall 46. A corresponding double-action hydraulic working cylinder 54 with a corresponding stroke is provided for moving the feed slide 44 towards the comminution roller 14 (and back again into the rest position).
Zwischen den Gegenmessern 19, 20 ist ein teilzylindrisches Lochsieb 56 angeordnet, welches außerhalb der gestrichelt eingezeichneten Bahn der Spitzen der Messerkörper 16, 18 liegt. Schräg abfallende untere Trichterwände 58, 60 leiten die durch das Lochsieb 56 fallenden Schnitzel nach unten zu einer Sammelrinne 62, in welcher eine Förder¬ schnecke 64 läuft. Dieser ist ein Schneckenantrieb 66 zugeordnet. Zum Drehen der Zerkleinerungswalze 14 ist ein Walzenan¬ trieb 68 vorgesehen, der ebenso wie der Abdeckantrieb 40, der Arbeitszylinder 54 und der Schneckenantrieb 66 von einer zentralen Steuereinheit 70 des Zerkleinerungswerkes her erregt wird. Die Steuereinheit 70 arbeitet in Abhän¬ gigkeit vom Ausgangssignal des Stellungsgebers 42 sowie eines Leistungsmessers 72, der in die Versorgungsleitung des Walzenantriebes 68 geschaltet ist.A partially cylindrical perforated screen 56 is arranged between the counter knives 19, 20 and lies outside the path of the tips of the knife bodies 16, 18 shown in dashed lines. Sloping lower hopper walls 58, 60 guide the chips falling through the perforated screen 56 down to a collecting channel 62 in which a conveyor screw 64 runs. A worm drive 66 is assigned to this. A roller drive 68 is provided for rotating the shredding roller 14 and, like the cover drive 40, the working cylinder 54 and the worm drive 66, is excited by a central control unit 70 of the shredding unit. The control unit 70 operates as a function of the output signal of the position transmitter 42 and of a power meter 72 which is connected to the supply line of the roller drive 68.
Die Steuereinheit 70 arbeitet nach folgenden Kriterien:The control unit 70 works according to the following criteria:
a) Wird vom Bedienungspersonal ein Abschalten des Zerklei¬ nerungswerkes angefordert, so wird zunächst der Abdeck- antrieb 40 in Schließrichtung der Abdeckplatte 22 erregt. Der Walzenantrieb 68 wird solange weiter erregt, bis die Abdeckplatte 22 ihre in der Zeichnung wiedergege¬ bene volle Schließstellung erreicht hat. Erst dann wird der Walzenantrieb 68 abgeschaltet.a) If the operator requests that the shredding plant be switched off, the cover drive 40 is first excited in the closing direction of the cover plate 22. The roller drive 68 continues to be excited until the cover plate 22 has reached its full closed position shown in the drawing. Only then is the roller drive 68 switched off.
b) Wird das Zerkleinerungswerk eingeschaltet, so bleibt die Abdeckplatte zunächst in ihrer Schließstellung, bis die Zerkleinerungswalze eine vorgegebene Mindestdrehzahl erreicht hat. Erst dann wird die Abdeckplatte aufge- steuert.b) If the shredding unit is switched on, the cover plate initially remains in its closed position until the shredding roller has reached a predetermined minimum speed. Only then is the cover plate opened.
c) Wann immer die durch das Ausgangssignal des Leistungs¬ messers 72 gemessene Belastung der Zerkleinerungswalze 14 einen vorgegebenen Schwellwert überschreitet, wird die Abdeckplatte 22 in Schließrichtung bewegt. Dies kann entweder stufenweise oder kontinuierlich in Form einer Nachregelung erfolgen.c) Whenever the load on the comminution roller 14 measured by the output signal of the power meter 72 exceeds a predetermined threshold value, the cover plate 22 is moved in the closing direction. This can be done either in stages or continuously in the form of a readjustment.
d) Der Arbeitszylinder 54 wird nur dann in Richtung eines Ausfahrens des Zustellschiebers 44 erregt, wenn zuvor die Abdeckplatte 22 zumindest teilweise geöffnet wurde.d) The working cylinder 54 is only excited in the direction of an extension of the feed slide 44 if previously the cover plate 22 has been opened at least partially.
e) Die Druckmittelversorgung des Arbeitszylinders 54 wird unterbrochen oder in Richtung eines Einfahrens der Kolbenstange des Arbeitszylinders 54 umgeschaltet, wenn eine zu große Leistungsaufnahme des Walzenan¬ triebes 68 festgestellt wird.e) The pressure medium supply to the working cylinder 54 is interrupted or switched in the direction of retracting the piston rod of the working cylinder 54 when the power consumption of the roller drive 68 is determined to be too high.
f) Der Abdeckantrieb 40 wird in Richtung eines Schließens der Abdeckplatte 22 erregt, wenn die gemessene Leistungs¬ aufnahme des Walzenantriebes 68 eine vorgegebene Schwelle überschreitet.f) The cover drive 40 is energized in the direction of closing the cover plate 22 when the measured power consumption of the roller drive 68 exceeds a predetermined threshold.
g) Der Abdeckantrieb 40 wird in Richtung einer Vergröße- rung der Öffnung zwischen der freien Kante der Abdeck¬ platte 22 und der Schulter der Bodenwand 28 erregt, wenn die gemessene Leistung des Walzenantriebes 68 eine vorgegebene Schwelle unterschreitet.g) The cover drive 40 is excited in the direction of an enlargement of the opening between the free edge of the cover plate 22 and the shoulder of the bottom wall 28 when the measured power of the roller drive 68 falls below a predetermined threshold.
h) Der Arbeitszylinder 54 wird in Richtung eines Ausfahrens des Zustellschiebers 44 erregt, wenn die gemessene Lei¬ stung des Walzenantriebes 68 eine vorgegebene Schwel¬ le unterschreitet.h) The working cylinder 54 is excited in the direction of an extension of the feed slide 44 when the measured power of the roller drive 68 falls below a predetermined threshold.
Wo in den vorgenannten Punkten a) bis h) Schwellwerte angesprochen sind, versteht sich, daß diese jeweils für den gegegebenen Punkt charakteristisch sind und nicht zusammenzufallen brauchen. Where threshold values are addressed in the aforementioned points a) to h), it goes without saying that these are each characteristic of the given point and do not need to coincide.

Claims

Ansprüche Expectations
1. Zerkleinerungswerk mit einem Gehäuse (10), mit einer im Gehäuse (10) gelagerten, mit Messerkörpern (16, 18) bestückten Zerkleinerungswalze (14), mit gehäusefesten Gegenmessern (19, 20), mit einem die Zerkleinerungswalze (14) teilweise unter Abstand umschlingenden Sieb (56), mit einem über dem Eingriffsbereich von Messerkörpern1. Shredding unit with a housing (10), with a shredding roller (14) mounted in the housing (10), equipped with knife bodies (16, 18), with counter-blades (19, 20) fixed to the housing, with one of the shredding rollers (14) partially underneath Distance wrapping sieve (56), with one over the engagement area of knife bodies
(16, 18) und Gegenmessern (19, 20) liegenden Vorratsraum (52) des Gehäuses (10), mit einem über einer Bodenwand (28) des Gehäuses (10) hin- und herbewegbaren Zustell¬ schieber (44) und mit einem Walzenantrieb (68) sowie einem Schieberantrieb (54), dadurch gekennzeichnet, daß der(16, 18) and counter knives (19, 20) of the storage space (52) of the housing (10), with a feed slide (44) which can be moved back and forth over a bottom wall (28) of the housing (10) and with a roller drive (68) and a slide drive (54), characterized in that the
Walzenantrieb (68) die Zerkleinerungswalze (14) mit einer hohen Drehzahl von vorzugsweise größenordnungsmäßig 200 bis 1000 U/min antreibt; daß über der Zerkleinerungswalze (14) eine durch einen Abdeckantrieb (40) bewegbare Abdeck- platte (22) angeordnet ist, die zwischen einer Schlie߬ stellung, in welcher sie die Zerkleinerungswalze (14) gegen den Vorratsraum (52) abdeckt, und mindestens einer Freigabestelle verlagerbar ist, in welcher die Verbindung zwischen der Zerkleinerungswalze (14) und dem Vorratsraum (52) zumindest teilweise freigegeben wird; und daß eine Steuereinheit (70) für den Walzenantrieb (68) und den Abdeckantrieb (40) in Abhängigkeit von der Belastung (72) der Zerkleinerungswalze (14) so arbeitet, daß der Walzen¬ antrieb (68) nur dann abgeschaltet wird, wenn die Abdeck- platte (22) zuvor ihre Schließstellung erreicht hat, und die Abdeckplatte (22) nur dann in ihre Freigabestellung bewegt wird, wenn die Zerkleinerungswalze (14) eine vor¬ gegebene Mindestdrehzahl erreicht hat.Roller drive (68) drives the comminution roller (14) at a high speed, preferably of the order of 200 to 1000 rpm; that a cover plate (22) which can be moved by a cover drive (40) is arranged above the comminution roller (14) and between at least one position in which it covers the comminution roller (14) against the storage space (52) and at least one Release point is displaceable, in which the connection between the comminution roller (14) and the storage space (52) is at least partially released; and that a control unit (70) for the roller drive (68) and the cover drive (40) operates in dependence on the load (72) of the comminution roller (14) in such a way that the roller drive (68) is only switched off when the Cover plate (22) has previously reached its closed position and the cover plate (22) is only moved into its release position when the comminution roller (14) has reached a predetermined minimum speed.
2. Zerkleinerungswerk nach Anspruch 1, dadurch gekenn- zeichnet, daß die Steuereinheit (70) ferner den Schie¬ berantrieb (54) so steuert, daß dieser angehalten oder in Einfahrrichtung erregt wird, wenn die Belastung (72) der Zerkleinerungswalze (14) einen vorgegebenen Schwell- wert überschreitet, und in Ausfahrrichtung erregt wird, wenn die Abdeckplatte (22) in einer Freigabestellung steht und die Belastung (72) der Zerkleinerungswalze (14) einen vorgegebenen Wert unterschreitet.2. shredding plant according to claim 1, characterized shows that the control unit (70) also controls the slide drive (54) in such a way that it is stopped or excited in the retracting direction when the load (72) of the comminution roller (14) exceeds a predetermined threshold value and excites in the extending direction becomes when the cover plate (22) is in a release position and the load (72) of the shredding roller (14) falls below a predetermined value.
3. Zerkleinerungswerk nach Anspruch 2, dadurch gekenn¬ zeichnet, daß die Steuereinheit (70) den Schieberan¬ trieb (54) so erregt, daß die Belastung der Zerkleinerungs¬ walze (14) im wesentlichen konstant ist.3. Shredding unit according to claim 2, characterized gekenn¬ characterized in that the control unit (70) excites the slide drive (54) so that the load on the shredding roller (14) is substantially constant.
4. Zerkleinerungswerk nach einem der Ansprüche 1 bis4. Shredding plant according to one of claims 1 to
3, dadurch gekennzeichnet, daß die Steuereinheit (70) den Abdeckantrieb (40) so erregt, daß die Belastung der Zerkleinerungswalze (14) im wesentlichen konstant ist.3, characterized in that the control unit (70) excites the cover drive (40) so that the load on the comminution roller (14) is substantially constant.
5. Zerkleinerungswerk nach einem der Ansprüche 1 bis5. Shredding plant according to one of claims 1 to
4, dadurch gekennzeichnet, daß die Abdeckplatte (22) auf einem schräg zum Messereingriffsbereich hin abfallen¬ den Weg geführt (30, 32) ist.4, characterized in that the cover plate (22) is guided (30, 32) on a path which slopes away obliquely towards the knife engagement area.
6. Zerkleinerungswerk nach einem der Ansprüche 1 bis6. Shredding plant according to one of claims 1 to
5, dadurch gekennzeichnet, daß der Abdeckantrieb (40) auf zwei den seitlichen Rändern der Abdeckplatte (22) zugeordneten starr gekoppelte Antriebselemente (34, 36) arbeitet.5, characterized in that the cover drive (40) works on two rigidly coupled drive elements (34, 36) assigned to the lateral edges of the cover plate (22).
7. Zerkleinerungswerk nach einem der Ansprüche 1 bis7. Shredding plant according to one of claims 1 to
6, dadurch gekennzeichnet, daß ein der Bodenwand (28) des Vorratsraumes (52) benachbartes Gegenmesser (19) bezüglich der Bodenwand (28) nach unten versetzt angeord- net ist. 6, characterized in that a counter knife (19) adjacent to the bottom wall (28) of the storage space (52) is arranged offset downward with respect to the bottom wall (28).
EP94927645A 1993-10-22 1994-09-24 Pulverizing mill Withdrawn EP0723479A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9316152U DE9316152U1 (en) 1993-10-22 1993-10-22 Shredding plant
DE9316152U 1993-10-22
PCT/EP1994/003189 WO1995011084A1 (en) 1993-10-22 1994-09-24 Pulverizing mill

Publications (1)

Publication Number Publication Date
EP0723479A1 true EP0723479A1 (en) 1996-07-31

Family

ID=6899761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94927645A Withdrawn EP0723479A1 (en) 1993-10-22 1994-09-24 Pulverizing mill

Country Status (5)

Country Link
US (1) US5639032A (en)
EP (1) EP0723479A1 (en)
AU (1) AU7698394A (en)
DE (1) DE9316152U1 (en)
WO (1) WO1995011084A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2785205A1 (en) 1998-10-30 2000-05-05 Phenix Ind Chipping mill for waste material, comprises frame for retracting feed funnel, interchangeable cutter, power source and discharge conveyor

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19614030A1 (en) * 1996-04-09 1997-10-16 Weima Apparatebau Gmbh Comminution machine with rotary cutter esp. for plastics material recycling industry
US5887804A (en) * 1997-06-05 1999-03-30 R & J Hansen, L.L.C. Apparatus for comminuting glass
DE29907500U1 (en) * 1999-04-30 1999-10-28 WEIMA Maschinenbau GmbH, 74360 Ilsfeld Granulator
US6588688B1 (en) * 2000-08-03 2003-07-08 Weima Maschinenbau Gmbh Grinder for comminuting waste material
ITRE20010033A1 (en) * 2001-04-04 2002-10-04 Bonfiglioli Ing Spa HAMMER CRUSHING PLANT
US10513468B2 (en) * 2016-06-03 2019-12-24 Whirlpool Corporation Composting device with sliding lid
CN109289353B (en) * 2018-10-25 2021-01-22 苏州莱轩电器科技有限公司 Pulse bag type dust collector with low running noise

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1244535B (en) * 1963-12-14 1967-07-13 Miag Muehlenbau Method and switching device for controlling a mill
DE2441675A1 (en) * 1974-08-30 1976-03-11 Franz Xaver Greisel Maschinenf Hammer mill with slide valve for inlet opening - with optimum use of output of electric drive motor uses controlled input of material
US4043514A (en) * 1976-03-16 1977-08-23 Conair, Inc. Comminution device
US4200243A (en) * 1977-11-23 1980-04-29 Conair, Inc. Comminution device
DE2937846C2 (en) * 1979-09-19 1985-05-15 Engelbrecht + Lemmerbrock Gmbh + Co, 4520 Melle Machine for shredding bulky material
US4844363A (en) * 1987-07-06 1989-07-04 Shredding Systems, Inc. Hopper ram for shredder
US5035367A (en) * 1989-02-15 1991-07-30 Nojima Keikinzoku Co., Ltd. Apparatus for disposing of medical waste by crushing
DE9003477U1 (en) * 1990-03-24 1991-07-25 Rössler, Peter, 74360 Ilsfeld Machine for shredding solid waste
EP0514327A1 (en) * 1991-05-07 1992-11-19 Kueny Maschinenbau Shredding apparatus for wood, metal parts, refuse and other waste
US5205495A (en) * 1992-02-18 1993-04-27 Shredding Systems, Inc. Apparatus for shredding and packaging hazardous waste containers and the contents thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9511084A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2785205A1 (en) 1998-10-30 2000-05-05 Phenix Ind Chipping mill for waste material, comprises frame for retracting feed funnel, interchangeable cutter, power source and discharge conveyor

Also Published As

Publication number Publication date
AU7698394A (en) 1995-05-08
US5639032A (en) 1997-06-17
DE9316152U1 (en) 1994-02-17
WO1995011084A1 (en) 1995-04-27

Similar Documents

Publication Publication Date Title
DE69711197T2 (en) METHOD AND DEVICE FOR COMPRESSION
EP0106268B1 (en) Compacting device for garbage consisting of packing material and easily compressable waste material
EP1304169A2 (en) Shredder device
EP1259326B1 (en) Top for a paper shredder, for receiving and feeding in paper
EP0723479A1 (en) Pulverizing mill
DE2912218A1 (en) Disintegrating machine for wood - has feed conveyor working together with counter-rotating deflector roller
EP1842594A1 (en) Device for crushing organic, decomposable waste material
EP0514327A1 (en) Shredding apparatus for wood, metal parts, refuse and other waste
EP1904236A1 (en) Comminuting device comprising several substantially parallel, motor-driven rotating or oscillating shafts
EP3017939A1 (en) Baling press
DE102012006650A1 (en) Crushing device for dividing bulky waste material, particularly wood and plastic waste, into manageable pieces, has feeding unit and part of storage container, which are connected to pivot machine unit
DE2614552A1 (en) SHREDDING MACHINE WITH A SHREDDING ROTOR
EP0605382B1 (en) Apparatus for comminuting waste materials
DE29501067U1 (en) Shredding machine
AT407225B (en) CRUSHING MACHINE
DE4210479A1 (en) Compacted-silage-extracting machine with horizontal cutters - has two cutters coupled together with different strokes guided by arms on curved vertical path
EP1420944A1 (en) Briquetting system
DE9408061U1 (en) Shredding device
AT402804B (en) Apparatus for disintegrating waste
DE10106094B4 (en) baler
DE19718614C1 (en) Comminuter for waste wood which provides a reliable feed
WO2012089291A2 (en) Comminution machine
DE4328687A1 (en) Shredder operating by the rotary-shears principle
DE2650690A1 (en) Frozen metal block cutting machine - with support plate over thrust cylinder for temporary block deposition
EP1132138A1 (en) Document shredder with a top for receiving and feeding documents

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19960328

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB IT LI NL

17Q First examination report despatched

Effective date: 19970618

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19980505