EP0795352A1 - Dispositif de broyage de tÔle ou de matière similaire - Google Patents

Dispositif de broyage de tÔle ou de matière similaire Download PDF

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Publication number
EP0795352A1
EP0795352A1 EP97103686A EP97103686A EP0795352A1 EP 0795352 A1 EP0795352 A1 EP 0795352A1 EP 97103686 A EP97103686 A EP 97103686A EP 97103686 A EP97103686 A EP 97103686A EP 0795352 A1 EP0795352 A1 EP 0795352A1
Authority
EP
European Patent Office
Prior art keywords
openings
grids
axis
striking tool
plates
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.)
Granted
Application number
EP97103686A
Other languages
German (de)
English (en)
Other versions
EP0795352B1 (fr
Inventor
Erhard Hoof
Frank Hoof
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.)
Albert Hoffmann GmbH
Original Assignee
Albert Hoffmann 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 Albert Hoffmann GmbH filed Critical Albert Hoffmann GmbH
Publication of EP0795352A1 publication Critical patent/EP0795352A1/fr
Application granted granted Critical
Publication of EP0795352B1 publication Critical patent/EP0795352B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/282—Shape or inner surface of mill-housings
    • B02C13/284—Built-in screens

Definitions

  • the invention relates to a device for comminuting sheet metal and similar material with a wear plate having a striking tool which is rotatable about an axis and grating or recesses with openings.
  • Such devices which also include hammer mills, are u. a. suitable for shredding car scrap.
  • the material is fed into the shredding device via a slope and then smashed and shredded between the striking tool and the grates or wear plates.
  • hammers sitting on a rotating rotor smash the material, which is then removed from the mill through openings in the grates.
  • Wear plates are used for such mills, separating, sorting and processing plants. They are either cast or consist of rolled sheets.
  • Disassembly can very often only be carried out due to wedging of the plates or grates in the system by expensive disassembly using a welding torch. This usually leads to the complete destruction of the grates or wear plates.
  • a desired frequent replacement of the grids or plates for the production of different materials, ie the replacement of only partially closed plates for later reuse and for varying the hole sizes has not been possible up to now.
  • the invention is therefore based on the object of developing a device of the type described at the outset in such a way that the elongation of the grids or the wear plates is reduced during their use.
  • openings or recesses limit webs, the course of which deviates from a straight line at least in the direction of the axis of the striking tool.
  • the invention is based on the knowledge that the strong elongation of wear plates or grates depends on the plate geometry and that a special shape of the openings or depressions reduces the elongation. Since the course of the webs located between the openings or depressions deviates according to the invention from a straight line, an elongation of the webs does not necessarily lead to an elongation of the wear plate, but can also lead to deformations within the grate or the wear plate which do not affect the dimensions of the grate or wear plate.
  • Such a design means that grids or plates arranged in the direction of the axis of the striking tool exert less force on the lateral boundary surfaces of the device during their use and a reduction in the elongation transversely to the rotor axis facilitates the exchange of grids or plates arranged next to one another.
  • the openings are arranged offset from one another and are essentially hexagonal.
  • This configuration has the further advantage that only three webs meet at each node.
  • wear plates as described in the prior art, the openings or depressions are square and thus four webs meet at each node. This has casting disadvantages.
  • the special shape of their openings leads to a considerable reduction in the cost of their production.
  • each impact tool that moves in a straight line relative to the openings runs alternately over openings and webs, as a result of which the shape behavior of the device is significantly improved.
  • an advantageous embodiment provides that the openings are pentagonal in an edge area and have the same area as in a central area.
  • the pentagonal opening shape in the edge area allows a straight edge termination of the wear plate or the grate and allows openings to be formed which correspond in their area to the hexagonal openings in the central area.
  • openings or depressions are offset from one another and are round.
  • Round openings also offer similar advantages to hexagonal openings in terms of casting technology and in relation to the elongation properties of the wear plate or the gratings and are therefore proposed as an alternative embodiment.
  • the openings When using round openings, it is advantageous if the openings have a straight side in an edge region. This ensures that openings are provided up to the edge region of the grate or the wear plate, and these openings are also to be designed such that the openings in the edge region have the same passage area as the openings in the central region of the grate or the wear plate.
  • An advantageous embodiment provides that the grids are arranged transversely to the axis of the striking tool. Since the course of the webs according to the invention reduces the elongation of the plates or gratings, such an arrangement is possible.
  • the grids have openings that become smaller in a direction transverse to the axis of the striking tool. Such a reduction in the size of the openings leads to a different grinding behavior, and in particular on ceiling grates of hammer mills, such a configuration of the openings can prevent comminuted material from falling back into the area of the working impact tools.
  • the wear plates or grates do not expand as much due to their special geometry as known wear plates or grates, the wear plates or grates according to the invention can also be made from steels with high wear resistance, such as, for example, B. austenitic steel can be made, which could not be used because of their strong ductility.
  • the structure of the hammer mill 1 shown in FIG. 1 is known.
  • Motor vehicles 3 slide into the rotor space 4 from the left side via a ramp 2.
  • this rotor space 4 there is a striking tool 5 which is rotatably mounted on an axis 6.
  • the striking tool 5 moves in the direction of the arrows 7 and tears apart the motor vehicle 3.
  • the parts 8 which are created are ground in the rotor space between the striking tool 5 and the grate 9.
  • the grids 9 have openings 10, at the edges of which the parts 8 are ground and through which the parts 8, if they are small enough, emerge from the rotor space 4.
  • the leaked parts 8 then fall onto a chute 11, on which they get out of the hammer mill onto a conveyor belt 12.
  • the grids 9 are arranged in a semicircle around the striking tool.
  • Floor gratings are located in the lower area.
  • ejection door 13 In the direction of the striking tool 5 following the floor grates there is an ejection door 13 which can open in the event of an explosion, and this is followed by a ceiling grille 14.
  • a hood 15 is provided on the side opposite the striking tool 5, which guides the parts 8 passing through the grates onto the chute 11.
  • the bottom gratings are arranged transversely to the axis 6 of the striking tool 5 and an elongation of the bottom gratings therefore does not press on the side cover 16 of the hood 15.
  • FIG. 2a shows the conventional design of the grids, in which bars 19 and 20 are arranged in the longitudinal direction 17 and in the transverse direction 18 of the grids 9. When the grids are used for a longer period of time, these webs cause the grate to expand in the direction of arrows 17 and 18.
  • FIG. 2b In order to avoid expansions in both directions, a grate according to FIG. 2b is proposed according to the invention, in which the webs do not form a continuous line either in the longitudinal direction 21 or in the transverse direction 22.
  • a grate design can be used for the ceiling grate, the ejection door and the floor grate.
  • a section of a floor grate is shown in FIG. 2c in a top view and FIG. 2d as a perspective view.
  • FIGS. 2e and f Further embodiments of the invention are shown in FIGS. 2e and f, in which the webs 23 in FIG. 2e are arranged diagonally to the plate and thus form a zigzag line both in the longitudinal direction 24 and in the transverse direction 25 of the plate.
  • Fig. 2f shows schematically the use of pentagonal openings 10, which can also be arranged so that a zigzag line is formed either in the longitudinal direction or in the transverse direction to the plate.
  • Fig. 2g shows a grate running transversely to the rotor axis with hexagonal openings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Crushing And Grinding (AREA)
EP97103686A 1996-03-11 1997-03-06 Broyeur à marteaux de tÔle ou de matière similaire Expired - Lifetime EP0795352B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19609347A DE19609347A1 (de) 1996-03-11 1996-03-11 Vorrichtung zur Zerkleinerung von Blech u. ä. Material
DE19609347 1996-03-11

Publications (2)

Publication Number Publication Date
EP0795352A1 true EP0795352A1 (fr) 1997-09-17
EP0795352B1 EP0795352B1 (fr) 1999-12-15

Family

ID=7787842

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97103686A Expired - Lifetime EP0795352B1 (fr) 1996-03-11 1997-03-06 Broyeur à marteaux de tÔle ou de matière similaire

Country Status (9)

Country Link
US (1) US5950940A (fr)
EP (1) EP0795352B1 (fr)
JP (1) JP4031080B2 (fr)
AT (1) ATE187662T1 (fr)
DE (2) DE19609347A1 (fr)
DK (1) DK0795352T3 (fr)
ES (1) ES2142637T3 (fr)
GR (1) GR3032786T3 (fr)
PT (1) PT795352E (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19835796C2 (de) * 1998-08-07 2001-12-06 Svedala Lindemann Gmbh Verfahren zum Betreiben des Luftkreislaufes und Fördern des Gutstromes im Gehäuse eines Hammerbrechers und Gehäuse eines Hammerbrechers zur Durchführung des Verfahrens
US7942353B2 (en) * 2006-10-26 2011-05-17 Allegheny Paper Shredders Corporation Adjustable screen for material destruction apparatus
DE102007058127A1 (de) * 2007-11-30 2009-06-04 Pallmann Maschinenfabrik Gmbh & Co Kg Vorrichtung zum Auflösen des Verbundes von im Verbund vorliegendem Aufgabegut
US8740121B1 (en) * 2009-06-19 2014-06-03 Republic Machine, Inc. Rotary grinder/shredder
CN103285974A (zh) * 2013-06-03 2013-09-11 嘉兴市一建机械制造有限公司 一种破碎机篦板
GB201815328D0 (en) * 2018-09-20 2018-11-07 Agco Int Gmbh Rotary cleaning shoe
DE102020102611B4 (de) 2020-02-03 2023-04-27 Albert Hoffmann Gmbh Hammermühle
DE102020102607B4 (de) 2020-02-03 2026-03-12 Albert Hoffmann Gmbh Hammermühle
DE102020102614B4 (de) 2020-02-03 2023-10-26 Albert Hoffmann Gmbh Hammermühle
BE1030121B1 (nl) * 2021-12-28 2023-07-26 Belgian Scrap Terminal Nv Bodemrooster voor de verwerking van metalen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946523A (en) * 1955-07-18 1960-07-26 Strong Scott Mfg Company Interchangeable screen construction for mill
US4061277A (en) * 1976-09-20 1977-12-06 Sivyer Steel Corporation Shredder with grate cartridge
GB1577769A (en) * 1977-05-18 1980-10-29 Maillet E J Shredders notably for processing heterogeneous materials
GB2068260A (en) * 1980-01-30 1981-08-12 Previero Sas Selecting grating for granulating mill
US4378756A (en) * 1979-09-10 1983-04-05 Recycled Paper Bedding, Inc. Animal bedding, process and apparatus for preparing the same
US5150844A (en) * 1986-11-04 1992-09-29 Shanley And Baker Apparatus for size reduction of heavy solid waste materials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523614A (en) * 1922-07-14 1925-01-20 Harry J Shelton Grinder and shredder
DE7301542U (de) * 1973-01-12 1973-04-05 American Pulverizer Co Gitterrost fuer zerkleinerungsmahlwerke

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946523A (en) * 1955-07-18 1960-07-26 Strong Scott Mfg Company Interchangeable screen construction for mill
US4061277A (en) * 1976-09-20 1977-12-06 Sivyer Steel Corporation Shredder with grate cartridge
GB1577769A (en) * 1977-05-18 1980-10-29 Maillet E J Shredders notably for processing heterogeneous materials
US4378756A (en) * 1979-09-10 1983-04-05 Recycled Paper Bedding, Inc. Animal bedding, process and apparatus for preparing the same
GB2068260A (en) * 1980-01-30 1981-08-12 Previero Sas Selecting grating for granulating mill
US5150844A (en) * 1986-11-04 1992-09-29 Shanley And Baker Apparatus for size reduction of heavy solid waste materials

Also Published As

Publication number Publication date
JPH10369A (ja) 1998-01-06
US5950940A (en) 1999-09-14
DK0795352T3 (da) 2000-05-08
PT795352E (pt) 2000-06-30
DE19609347A1 (de) 1997-09-18
ES2142637T3 (es) 2000-04-16
EP0795352B1 (fr) 1999-12-15
GR3032786T3 (en) 2000-06-30
JP4031080B2 (ja) 2008-01-09
DE59700834D1 (de) 2000-01-20
ATE187662T1 (de) 2000-01-15

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