EP0514327A1 - Shredding apparatus for wood, metal parts, refuse and other waste - Google Patents

Shredding apparatus for wood, metal parts, refuse and other waste Download PDF

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Publication number
EP0514327A1
EP0514327A1 EP92810326A EP92810326A EP0514327A1 EP 0514327 A1 EP0514327 A1 EP 0514327A1 EP 92810326 A EP92810326 A EP 92810326A EP 92810326 A EP92810326 A EP 92810326A EP 0514327 A1 EP0514327 A1 EP 0514327A1
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EP
European Patent Office
Prior art keywords
roller
blades
counter
counter knife
slide
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Withdrawn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
EP92810326A
Other languages
German (de)
French (fr)
Inventor
Bernd Päper
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.)
KUENY MASCHINENBAU
Original Assignee
KUENY MASCHINENBAU
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 KUENY MASCHINENBAU filed Critical KUENY MASCHINENBAU
Publication of EP0514327A1 publication Critical patent/EP0514327A1/en
Withdrawn legal-status Critical Current

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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
    • B02C18/24—Drives
    • 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
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/145—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with knives spaced axially and circumferentially on the periphery of a cylindrical rotor unit
    • 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
    • B02C18/18—Knives; Mountings thereof
    • B02C2018/188—Stationary counter-knives; Mountings thereof

Definitions

  • Shredding machines are already known which can be used for shredding wood, metal parts, waste and other waste.
  • a machine is known with a horizontally-axis, motor-driven rollers provided with cutting knives for comminuting the material, which cooperates with two organs parallel to the roller axis and complementary to the design of the cutting knives, these organs delimiting the lower edge of a material hopper in such a way that this one organ is designed as a counter knife for shearing off material, while the other organ serves more as a scraper to prevent film-like soft material from sticking to the knives and thus preventing the cutting action.
  • the machine according to the present invention is now a further development of this known device. It belongs to the category of machines with the features of the preamble of claim 1 and is characterized by the characterizing features of this claim. A particularly advantageous embodiment is also provided with the features listed in claims 2 and 3, all of which are to be considered inventive.
  • the machine shown in the drawing has a material hopper 1 with a rectangular cross section sitting on a frame, which has an inclined wall 1a, a vertical wall 1b and a bottom 1c.
  • the edge connecting the floor 1c to the inclined wall 1a is missing.
  • a horizontal-axis roller 4 driven by a motor 2 via a gear 3 and a transmission, not shown in the drawing, extends into the funnel space.
  • This roller is provided with knives 5, one of which is shown in FIG. 4, and which are each distributed on the roller 4 by means of a knife carrier 6 and distributed in a helical pattern.
  • a counter knife 7 At the free edge of the hopper bottom 1c there is a counter knife 7.
  • a counter knife 8 At the free edge of the oblique hopper wall 1a there is a counter knife 8 and a third counter knife 9 is located in the direction of rotation A of the working roller between the two counter knives 7 and 8. All these three knives have one closed the roller 4 equipped with the knives 5 complementary contour, the distance between the knives and the counter knives is extremely small, so that the knives and counter knives together form a pair of scissors.
  • the roller 4 Outside the hopper 1, the roller 4 is surrounded by a sieve 11, so that only material parts that are smaller than the holes in the sieve 11 can get into the collecting container 10, from where they are guided away by means of the transport screw 13.
  • a slide 15 can be shifted against the roller 4 by a preferably hydraulic shifting mechanism 14, so that the material in the hopper can be pressed against the roller.
  • the cutting unit runs backwards for an adjustable time in order to be able to run freely (reversing control).
  • the hydraulic system controlling the actuation of the slide 15 is provided with a pressure sensor which, when an adjustable pressure, which is usually below 250 bar, is reached, causes the slide to be returned to the end position, so that material tilted in the funnel filling, which in itself does not cause any engine stress Consequence, can loosen up.
  • an adjustable pressure which is usually below 250 bar
  • a blockage value can be simulated via the electronic control.
  • This control option kit is necessary for sticky material in order to clean the knife plates in reverse gear.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

The shredding apparatus has a roller (4) provided with individual blades, the individual blades being preferably arranged in one or several helical lines. These blades do not cooperate, as is customary, with one counter blade and one stripping element, but rather with three counter blades (7, 8, 9) which have a shape which is complementary to the blades, so that together with the blades they form a pair of scissors. For this purpose, the distance between the blades and the counter blades is kept very small, that is to say smaller than 1 mm. A slide (15) which is actuated by a displacement mechanism (14) serves to feed the material to be shredded. The motor (2) which serves to drive the roller (4) is provided with a sensor which responds when the received power has exceeded an adjustable limit value. As a result of the responding of the sensor, the slide (15) is drawn back during an adjustable time period and the roller (4) is driven in the reverse direction, as a result of which cleaning of the roller blade is brought about. <IMAGE>

Description

Es sind bereits Zerkleinerungsmaschinen bekannt, die sich zum Zerkleinern von Holz, Metallteilen, Müll und anderen Abfällen verwenden lassen. So ist insbesondere eine Maschine bekannt mit einer horizontalachsigen, motorisch angetriebenen, mit Schneidemessern zum Zerkleinern des Materials versehenen Walzen, die mit zwei zur Walzenachse parallelen, zur Ausgestaltung der Schneidemesser komplementären Organen zusammenarbeitet, wobei diese Organe derart den unteren Rand eines Materialtrichters begrenzen, dass das eine Organ als Gegenmesser zum Abscheren von Material ausgebildet ist, während das andere Organ eher als Abstreifer dient, um zu verhindern, dass folienartiges weiches Material auf den Messern kleben bleibt und so die Schneidwirkung verhindert.Shredding machines are already known which can be used for shredding wood, metal parts, waste and other waste. Thus, in particular, a machine is known with a horizontally-axis, motor-driven rollers provided with cutting knives for comminuting the material, which cooperates with two organs parallel to the roller axis and complementary to the design of the cutting knives, these organs delimiting the lower edge of a material hopper in such a way that this one organ is designed as a counter knife for shearing off material, while the other organ serves more as a scraper to prevent film-like soft material from sticking to the knives and thus preventing the cutting action.

Die Maschine nach der vorliegenden Erfindung ist nun eine Weiterentwicklung dieser bekannten Einrichtung. Sie gehört zur Kategorie der Maschinen mit den Merkmalen des Oberbegriffs des Anspruchs 1 und ist gekennzeichnet durch die kennzeichnenden Merkmale dieses Anspruchs. Eine besonders vorteilhafte Ausführungsform ist auch mit den in den Ansprüchen 2 und 3 aufgeführten Merkmalen versehen, die alle als erfinderisch zu gelten haben.The machine according to the present invention is now a further development of this known device. It belongs to the category of machines with the features of the preamble of claim 1 and is characterized by the characterizing features of this claim. A particularly advantageous embodiment is also provided with the features listed in claims 2 and 3, all of which are to be considered inventive.

Nachfolgend wird anhand der beiliegenden Zeichnung ein Ausführungsbeispiel der Erfindung beschrieben. In der Zeichnung zeigt:

  • die Figur 1 eine Seitenansicht der Maschine, teilweise geschnitten,
  • die Figur 2 einen Ausschnitt aus der Figur 2,
  • die Figur 3 einen Ausschnitt aus einer Abwicklung der Walze, und
  • die Figur 4 ein Schneidemesser im Detail in drei verschiedenen Ansichten.
An exemplary embodiment of the invention is described below with reference to the accompanying drawing. The drawing shows:
  • 1 shows a side view of the machine, partly in section,
  • FIG. 2 shows a detail from FIG. 2,
  • 3 shows a section of a development of the roller, and
  • 4 shows a cutting knife in detail in three different views.

Die in der Zeichnung dargestellte Maschine weist einen auf einem Gestell sitzenden Materialtrichter 1 mit rechteckigem Querschnitt auf, der eine schiefe Wand 1a, eine senkrechte Wand 1b und einen Boden 1c besitzt. Es fehlt die den Boden 1c mit der schiefen Wand 1a verbindende Kante. An der Stelle dieser Kante reicht eine horizontalachsige, durch einen Motor 2 über ein Getriebe 3 und eine in der Zeichnung nicht dargestellte Transmission angetriebene Walze 4 in den Trichterraum hinein. Diese Walze ist mit Messern 5 versehen, von denen eines in der Figur 4 dargestellt ist, und die schraubenlinienförmig verteilt je mittels eines Messerträgers 6 auf der Walze 4 befestigt sind. Am freien Rand des Trichterbodens 1c sitzt ein Gegenmesser 7. Am freien Rand der schiefen Trichterwand 1a ein Gegenmesser 8 und ein drittes Gegenmesser 9 befindet sich in der Drehrichtung A der arbeitenden Walze zwischen den beiden Gegenmessern 7 und 8. Alle diese drei Messer haben einen zu der mit den Messern 5 bestückten Walze 4 komplementäre Kontur, wobei der Abstand zwischen den Messern und den Gegenmessern ausserordentlich klein ist, so dass die Messer und Gegenmesser zusammen eine Schere bilden. Ausserhalb des Trichters 1 ist die Walze 4 von einem Sieb 11 umgeben, so dass nur Materialteile, die kleiner sind als die Löcher des Siebes 11 in den Auffangbehälter 10 gelangen können, von wo sie mittels der Transportschnecke 13 weggeführt werden.The machine shown in the drawing has a material hopper 1 with a rectangular cross section sitting on a frame, which has an inclined wall 1a, a vertical wall 1b and a bottom 1c. The edge connecting the floor 1c to the inclined wall 1a is missing. At the location of this edge, a horizontal-axis roller 4, driven by a motor 2 via a gear 3 and a transmission, not shown in the drawing, extends into the funnel space. This roller is provided with knives 5, one of which is shown in FIG. 4, and which are each distributed on the roller 4 by means of a knife carrier 6 and distributed in a helical pattern. At the free edge of the hopper bottom 1c there is a counter knife 7. At the free edge of the oblique hopper wall 1a there is a counter knife 8 and a third counter knife 9 is located in the direction of rotation A of the working roller between the two counter knives 7 and 8. All these three knives have one closed the roller 4 equipped with the knives 5 complementary contour, the distance between the knives and the counter knives is extremely small, so that the knives and counter knives together form a pair of scissors. Outside the hopper 1, the roller 4 is surrounded by a sieve 11, so that only material parts that are smaller than the holes in the sieve 11 can get into the collecting container 10, from where they are guided away by means of the transport screw 13.

Auf dem Trichterboden 1c lässt sich durch einen vorzugsweise hydraulischen Verschiebemechanismus 14 ein Schieber 15 gegen die Walze 4 verschieben, damit das im Trichter befindliche Material gegen die Walze gepresst werden kann.On the hopper bottom 1c, a slide 15 can be shifted against the roller 4 by a preferably hydraulic shifting mechanism 14, so that the material in the hopper can be pressed against the roller.

Der Elektromotor 2 ist mit einem Leistungs-Sensor einstellbarer Empfindlichkeit versehen, der so geschaltet ist, dass er beim Überschreiten eines eingestellten Grenzwerts bewirkt,

  • a) dass der Schieber 15 nicht weiter angedrückt wird, solange der Grenzwert überschritten ist,
  • b) dass der Schieber 15 während der Grenzwertüberschreitung zurückgezogen wird, bis der Normalwert wieder vorhanden ist, und
  • c) dass der Schieber 15 in die Endposition auf die vorwählbare Zeit zurückgezogen und nachher wieder angedrückt wird.
The electric motor 2 is provided with a power sensor with adjustable sensitivity, which is switched in such a way that it causes a set limit value to be exceeded,
  • a) that the slide 15 is not pressed further as long as the limit value is exceeded,
  • b) that the slide 15 is withdrawn while the limit value is exceeded until the normal value is restored, and
  • c) that the slide 15 is retracted into the end position for the preselectable time and then pressed again.

Wenn der Stromaufnahmewert des Motors den zulässigen Belastungswert erreicht oder kurzfristig überschreitet, läuft das Schneidwerk während einer einstellbaren Zeit rückwärts, um sich freilaufen zu können (Reversiersteuerung).If the current consumption value of the motor reaches the permissible load value or exceeds it for a short time, the cutting unit runs backwards for an adjustable time in order to be able to run freely (reversing control).

Die die Betätigung des Schiebers 15 steuernde Hydraulikanlage ist mit einem Drucksensor versehen, der beim Erreichen eines einstellbaren, üblicherweise unter 250 BAR liegenden Druckes bewirkt, dass der Schieber in die Endlage zurückgesteuert wird, damit in der Trichterfüllung verkantetes Material, das an sich keine Motorenbeanspruchung zur Folge hat, sich auflockern kann.The hydraulic system controlling the actuation of the slide 15 is provided with a pressure sensor which, when an adjustable pressure, which is usually below 250 bar, is reached, causes the slide to be returned to the end position, so that material tilted in the funnel filling, which in itself does not cause any engine stress Consequence, can loosen up.

Mehrere Blockadenwerte innerhalb eines vorwählbaren Zeitintervalls zeigen die Nichtzerkleinerungmöglichkeit an schalten die Maschine ab.Several blockage values within a preselectable time interval show the possibility of non-shredding and switch off the machine.

Über die elektronische Steuerung kann ein Blockadewert simuliert werden. Diese Steuerungsmöglichekit ist bei klebrigem Material notwendig, um die Messerplatten im Rückwärtsgang zu reinigen.A blockage value can be simulated via the electronic control. This control option kit is necessary for sticky material in order to clean the knife plates in reverse gear.

Versuche haben ergeben, dass eine so ausgebildete Maschine trotz der verhältnismässig geringen Unterschiede zu den dem gleichen Zweck dienenden bekannten Maschinen wesentlich leistungsfähiger und weniger störanfällig ist.Tests have shown that, despite the relatively small differences from the known machines serving the same purpose, a machine designed in this way is considerably more efficient and less susceptible to failure.

Claims (3)

Zum Zerkleinern von Holz, Metallteilen, Müll und anderen Abfällen dienende Maschine mit einem der Materialzufuhr dienenden Materialtrichter (1) der mindestens an seinem unteren Ende einen rechteckigen Querschnitt aufweist und unten durch eine teilweise in ihn hineinragende, horizontalachsige, motorisch angetriebene, mit Schneidemessern (5) zum Zerkleinern des Materials versehene Walze (4) abgeschlossen ist, wobei die beiden zur Walzenachse parallelen Trichterränder mit zu den Schneidemessern (5) komplementären Konturen versehen sind und derjenige Trichterrand, gegen den sich beim Zerkleinern der im Trichter befindliche Walzenteil dreht, als Gegenmesser (7) zum Abscheren des Materials ausgebildet ist, dadurch gekennzeichnet, dass auch der zweite Trichterrand als Gegenmesser (8) zum Abscheren ausgebildet ist und dass auf der Aussenseite ein drittes zum Abscheren dienendes Gegenmesser (9) angeordnet ist.Machine for the shredding of wood, metal parts, waste and other waste with a material hopper (1) which serves to feed the material and which has a rectangular cross-section at least at its lower end and at the bottom through a horizontal-axis, motor-driven, with cutting knives that partially protrude into it ) roller (4) provided for crushing the material is completed, the two funnel edges parallel to the roller axis being provided with contours complementary to the cutting knives (5) and the funnel edge against which the roller part located in the funnel rotates as a counter knife ( 7) is designed for shearing off the material, characterized in that the second funnel edge is also designed as a counter knife (8) for shearing off and that a third counter knife (9) serving for shearing is arranged on the outside. Maschine nach Anspruch 1, dadurch gekennzeichnet, dass die Gegenmesser (7, 8, 9) so angeordnet sind, dass die Schneidekanten des einen Gegenmessers (7) in einer unterhalb der Walzenachse befindlichen horizontalen Ebene und die Schneidekanten des dritten Gegenmessers (9) in einer oberhalb der Walzenachse befindlichen horizontale Ebene liegen.Machine according to claim 1, characterized in that the counter knives (7, 8, 9) are arranged such that the cutting edges of the one counter knife (7) in a horizontal plane located below the roller axis and the cutting edges of the third counter knife (9) in one horizontal plane located above the roller axis. Maschine nach Anspruch 1 oder 2, mit einem am Boden (1c) des Trichters angeordneten, durch einen Verschiebemechanismus (14) horizontal verschiebbaren Schieber (15), um zu zerkleinerndes Material gegen die Walze (4) zu pressen, und mit einem durch die Antriebsleistung der Walze beeinflussbaren Sensor, dadurch gekennzeichnet, dass dieser Sensor derart als Steuerorgan für den Verschiebemechanismus (14) und den Walzenantrieb (2) geschaltet ist, dass er beim Überschreiten eines einstellbaren Grenzwertes während einer ebenfalls einstellbaren Zeitdauer den Schieber von der Walze wegzieht und den Wechsel der Drehrichtung der Walze bewirkt.Machine according to claim 1 or 2, with a slide (15) arranged on the bottom (1c) of the hopper and horizontally displaceable by a displacement mechanism (14) for pressing material to be shredded against the roller (4), and with one by the drive power of the roller which can be influenced, characterized in that this sensor is connected as a control element for the displacement mechanism (14) and the roller drive (2) in such a way that when an adjustable limit value is exceeded during a likewise adjustable period of time, it pulls the slide away from the roller and the change the direction of rotation of the roller.
EP92810326A 1991-05-07 1992-05-05 Shredding apparatus for wood, metal parts, refuse and other waste Withdrawn EP0514327A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH136391 1991-05-07
CH1363/91 1991-05-07

Publications (1)

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EP0514327A1 true EP0514327A1 (en) 1992-11-19

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995011084A1 (en) * 1993-10-22 1995-04-27 Weima Apparatebau Gmbh Pulverizing mill
JPH08103678A (en) * 1994-10-05 1996-04-23 Kinki:Kk Uniaxial shear type crusher
EP0712663A1 (en) * 1994-11-19 1996-05-22 Alpirsbacher Maschinenbau GmbH &amp; Co. KG Metal-chip comminuting device
WO1998016360A1 (en) * 1996-10-14 1998-04-23 Gerold Barth Processing device for crushing, conveying and plastifying thermoplastic synthetic material
EP0908238A1 (en) 1997-10-06 1999-04-14 UNTERWURZACHER PATENTVERWERTUNGSGESELLSCHAFT mbH Material shredding apparatus
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
ES2147110A1 (en) * 1998-01-14 2000-08-16 Scoiner S L Waste crushing machine
EP1048353A1 (en) * 1999-04-30 2000-11-02 Weima Maschinenbau GmbH Shredding machine
EP1625889A1 (en) * 2004-08-10 2006-02-15 Balemaster Europe B.V. Device and method for comminution and use thereof
US7077344B2 (en) 2002-03-12 2006-07-18 Starlinger & Co. Gesellschaft M.B.H. Device for the comminution of materials
WO2007086040A2 (en) * 2006-01-30 2007-08-02 James Thomas Hennessy A device for shredding timber articles and apparatus comprising the device
CN110152789A (en) * 2019-05-22 2019-08-23 杨会晶 A kind of rare earth milling process equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190417A2 (en) * 1985-01-10 1986-08-13 Paal's Packpressen-Fabrik GmbH &amp; Co. KG Device for comminuting waste paper
US4793561A (en) * 1982-05-24 1988-12-27 Mac Corporation Of America Speed-responsive reversing hydraulic drive for rotary shredder
DE4026795A1 (en) * 1989-08-30 1991-03-07 Manfred Lindner Machine for cutting up pieces of scrap wood - has slowly rotating rotor which cooperates with two fixed blades

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4793561A (en) * 1982-05-24 1988-12-27 Mac Corporation Of America Speed-responsive reversing hydraulic drive for rotary shredder
EP0190417A2 (en) * 1985-01-10 1986-08-13 Paal's Packpressen-Fabrik GmbH &amp; Co. KG Device for comminuting waste paper
DE4026795A1 (en) * 1989-08-30 1991-03-07 Manfred Lindner Machine for cutting up pieces of scrap wood - has slowly rotating rotor which cooperates with two fixed blades

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995011084A1 (en) * 1993-10-22 1995-04-27 Weima Apparatebau Gmbh Pulverizing mill
US5639032A (en) * 1993-10-22 1997-06-17 Weima Apparatebau Gmbh Comminuting unit
JPH08103678A (en) * 1994-10-05 1996-04-23 Kinki:Kk Uniaxial shear type crusher
JP2613362B2 (en) * 1994-10-05 1997-05-28 株式会社キンキ Single-shaft crusher
EP0712663A1 (en) * 1994-11-19 1996-05-22 Alpirsbacher Maschinenbau GmbH &amp; Co. KG Metal-chip comminuting device
WO1998016360A1 (en) * 1996-10-14 1998-04-23 Gerold Barth Processing device for crushing, conveying and plastifying thermoplastic synthetic material
EP0908238A1 (en) 1997-10-06 1999-04-14 UNTERWURZACHER PATENTVERWERTUNGSGESELLSCHAFT mbH Material shredding apparatus
ES2147110A1 (en) * 1998-01-14 2000-08-16 Scoiner S L Waste crushing machine
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
EP1048353A1 (en) * 1999-04-30 2000-11-02 Weima Maschinenbau GmbH Shredding machine
US7077344B2 (en) 2002-03-12 2006-07-18 Starlinger & Co. Gesellschaft M.B.H. Device for the comminution of materials
EP1625889A1 (en) * 2004-08-10 2006-02-15 Balemaster Europe B.V. Device and method for comminution and use thereof
WO2007086040A2 (en) * 2006-01-30 2007-08-02 James Thomas Hennessy A device for shredding timber articles and apparatus comprising the device
WO2007086040A3 (en) * 2006-01-30 2007-11-15 James Thomas Hennessy A device for shredding timber articles and apparatus comprising the device
CN110152789A (en) * 2019-05-22 2019-08-23 杨会晶 A kind of rare earth milling process equipment

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