EP2529834B1 - Machine de coupe à tambour et boîte à couteaux pour une machine de ce type - Google Patents

Machine de coupe à tambour et boîte à couteaux pour une machine de ce type Download PDF

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Publication number
EP2529834B1
EP2529834B1 EP12170395.3A EP12170395A EP2529834B1 EP 2529834 B1 EP2529834 B1 EP 2529834B1 EP 12170395 A EP12170395 A EP 12170395A EP 2529834 B1 EP2529834 B1 EP 2529834B1
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EP
European Patent Office
Prior art keywords
drum
rotary drum
cutting machine
blade
knife
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.)
Active
Application number
EP12170395.3A
Other languages
German (de)
English (en)
Other versions
EP2529834A3 (fr
EP2529834A2 (fr
Inventor
Alexander Bach
Bernd Kruse
Wolfgang Brümmer
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.)
Fh Schule Muehlenbau GmbH
Original Assignee
Fh Schule Muehlenbau GmbH
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Publication date
Application filed by Fh Schule Muehlenbau GmbH filed Critical Fh Schule Muehlenbau GmbH
Publication of EP2529834A2 publication Critical patent/EP2529834A2/fr
Publication of EP2529834A3 publication Critical patent/EP2529834A3/fr
Application granted granted Critical
Publication of EP2529834B1 publication Critical patent/EP2529834B1/fr
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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
    • B02C9/00—Other milling methods or mills specially adapted for grain
    • B02C9/02—Cutting or splitting grain

Definitions

  • the invention relates to a drum cutting machine with a rotary drum.
  • the lateral surface of the rotary drum is provided with a plurality of holes.
  • a plurality of knives is arranged.
  • the invention also relates to a knife basket for such a drum cutting machine.
  • Such machines are used to crush cereal grains.
  • the cereal grains are introduced into the interior of the rotary drum and move through the holes provided in the lateral surface of the rotary drum to the outside.
  • the blades are arranged. Once a grain protrudes outward beyond the bore, it hits the rotation drum of the drum on one of the knives, so that a part of the grain is cut off.
  • a drum cutting machine according to the preamble of claim 1 is made US 792 485 A known.
  • the invention is based on the object to present a drum cutting machine, in which the maintenance is reduced.
  • the object is achieved with the features of claim 1.
  • a support member is regularly insufficient to keep the knife safe.
  • a second support member is provided which also has an attachment point defining the position of the cutting edge for each of the knives.
  • Each of the support parts may be arranged adjacent to one of the end faces of the rotary drum. The knives may then extend along the rotary drum from the first support member to the second support member.
  • the support member may be configured so that the cutting edge of the knife rests against the abutment point. However, then the orientation of the entire knife changes when the cutting edge is deformed in the area of the contact point.
  • the support part therefore two points of attachment for each knife. The two contact points can engage on different surfaces of the knife, for example on the two surfaces which adjoin the cutting edge. The position of the cutting edge in the support member is then determined not by the cutting edge itself but by the surfaces adjacent the cutting edge.
  • the two surfaces of the knife, on which rest the two contact surfaces of the support member, are the surfaces adjacent to the cutting edge. Since it is not easy to exactly reproduce the sharp cutting edge of the blade in the support member, the abutment surfaces preferably do not extend directly to the cutting edge. This means that there is no contact between the contact surfaces and the knife in the immediate vicinity of the cutting edge.
  • the support member may have an undercut in the radial direction.
  • a suitable attachment means such as a screw which engages behind the undercut, the knife can be pulled against the support member and thereby fixed.
  • the support member has an elongated undercut which extends substantially parallel to the contour of the rotary drum.
  • the undercut then forms a rail, along which the fastening means can be guided in a suitable position for the attachment of a knife. At this point, the fastener is stretched.
  • the support member is an element of a structural component, which can be connected in its entirety with the machine.
  • the structural component of two side plates and an intermediate plate, wherein at least one of the side plates is formed as a support member according to the invention.
  • the knives should be aligned so that they extend parallel to the axis of the rotary drum and that the cutting edges have the smallest possible distance to the lateral surface of the rotary drum.
  • the distance may be, for example, between 0.1 mm and 0.2 mm.
  • at least 10, preferably at least 20, knives may be associated with a rotary drum.
  • the support member has contact points for each of the knives which define the position of the cutting edge.
  • the knives are arranged close to each other and can be found in the Sum over a circumferential angle of the rotary drum of at least 45 °, preferably at least 90 °, more preferably at least 135 ° extend. An extension over a circumferential angle of more than 240 ° is usually not desired.
  • the blades are arranged predominantly below the rotary drum.
  • the drum cutter may be equipped with more than one rotary drum.
  • the plurality of rotary drums may be driven by a common shaft.
  • the size of the debris depends on how far the kernel can move out of the well after separating the previous debris before striking the next knife. This depends on how the back surface of the knife facing the rotary drum is aligned. After separation of the previous fragment, the remaining grain is guided on the back surface of the respective knife. Depending on the angle of attack of the back surface, the cereal grain may more or less exit the bore before it encounters the next knife. If the back surface is aligned almost parallel to the outer surface of the rotary drum, the grain can move only slightly and there are small fragments. If the angle of attack is greater, larger fragments will result. Angling angle means that the distance between the rotary drum and the back surface increases the further you move away from the cutting edge.
  • the support parts should be arranged so that the cutting edges on all knives have the same distance from the rotary drum.
  • the angle of attack should be the same for all knives.
  • the angle of attack between 2 ° and 15 °, preferably between 3 ° and 12 °. The smaller angles within this range lead to a fine cut, the larger angles to a rough cut.
  • the drum cutting machine can be equipped with a knife basket, which can be easily replaced as a unit.
  • the knife basket comprises two support parts and a plurality of knives attached to the support parts, the knives being fixed in the positions defined by the abutment points of the support parts.
  • the drum cutting machine comprises a set of knife baskets, wherein the knives of the different knife baskets have different angles of incidence.
  • the kit may include a first knife basket for fine-cut where the angle of attack is between 2 ° and 5 °.
  • the angle of attack can be between 5 ° and 8 °.
  • the angle of attack can be between 9 ° and 12 °.
  • the invention also relates to a knife basket for such a drum cutting machine.
  • the knife basket includes two Support members, which are arranged in a matched to the rotary drum distance from each other, and a plurality of knives, which are respectively secured to the two support members and whose position is defined by contact points of the support members.
  • the knife basket can be combined with other features described above with reference to the drum cutting machine according to the invention.
  • a shaft 15 is rotatably mounted in a machine housing 16.
  • two rotary drums 14 are fixed, whose lateral surfaces are provided with a plurality of holes 17.
  • the diameter of the holes 17 is selected so that cereal grains can pass straight through.
  • Via an electric motor 18, the shaft 15 can be rotated with the rotary drums 14 in rotation.
  • the speed is about 50 rpm.
  • the lower part of both rotary drums 14 is surrounded by a respective knife basket 18, as in Fig. 2 is shown in perspective view.
  • the knife basket 18 is composed of two structural members 19 to which a plurality of knives 20 are attached.
  • the structural components 19 are arranged parallel to the two end faces of the rotary drum 14 and adapted to the circular contour of the end faces.
  • the knives 20, which extend between the two structural components 19, are held at a small distance from the lateral surface of the rotary drum 14.
  • the knife basket 18 comprises thirty knives 20, which are all parallel to one another and are arranged at a small distance from the lateral surface of the rotary drum 14. In total, approximately the lower half of the rotary drum 14 is covered by the knives 20.
  • cereal grains can be fed into the interior of the rotary drum 14. By gravity, the grains fall into the lower part of the rotary drum. By the rotation of the rotary drum 14, the cereal grains are kept in motion, so that again and again cereal grains come in the correct position and orientation to enter into one of the holes 17. The cereal grains then move through the holes 17 to the outside until they protrude beyond the lateral surface of the rotary drum 14. By the rotation of the rotary drum 14, the grain is struck against one of the knives 20, so that a part of the grain is cut off. The remaining part of the cereal grain continues to move outwards until contact with one of the knives 20 takes place again further part of the cereal grain is cut off. The fragments of the cereal grains are collected under the rotary drums 14 and transported away for further use.
  • FIG. 5 shows a section of the rotary drum 14 with a bore 17 and a arranged under the rotary drum 14 knife 20.
  • the knives 20 are adjusted so that the distance between the cutting edge 28 and the lateral surface of the rotary drum is as small as possible. In practice, the distance, as indicated by the dashed line, is about 1 mm.
  • the angle of attack of the back surface 27 of the blade 20 sets how far the remaining grain can move out of the holes 17 before it encounters the next blade 20. The greater the angle of attack between the rear surface 27 and the tangent line drawn in dashed lines to the rotary drum 14, the greater becomes the fraction of cereal grain separated from the following knife 20.
  • three knife baskets 18 are provided, in which the inclination angle of the knives 20 is different.
  • the inclination angle is about 4 °.
  • the inclination angle is about 7.5 °.
  • the inclination angle is about 11 °.
  • a needle drum may be provided, the needles of which engage in the bores 17 in order to release also stuck cereal grains from the bores 17.
  • the structural component 19 is composed of three components, namely two side plates and an intermediate plate arranged between the side plates 22.
  • the side plates have a substantially semicircular contour corresponding to the lateral surface of the rotary drum 14.
  • a blade receptacle is formed in each case for each of the knives 20, so that the side plates each form a support part 23 in the sense of the invention.
  • each blade receptacle comprises two contact surfaces 24, 25, one of which rests on the front surface 26 and one on the rear surface 27 of the blade 20.
  • the contact surfaces 24, 25 do not extend to the cutting edge 28, but keep with a circular recess at a distance.
  • the support members 23 each have an undercut 30 in the radial direction.
  • the support members 23 are held at a distance to each other, which finds an outwardly extending screw with her head to the undercuts 30 support.
  • the screw is passed through a hole in the knife 20 and thus forms a fastening element 29 for the knife 20.
  • the undercuts 30 extend parallel to the contour of the support members 23, so that a rail is formed, along which the screw can be moved.
  • the screw can thereby be tensioned against the knife 20 in any desired position, that is to say in particular in the position predefined by the contact surfaces 24, 25. It is therefore a simple artisanal activity to assemble a knife basket 18 from the supporting parts 23 and the corresponding number of knives 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Threshing Machine Elements (AREA)
  • Harvester Elements (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Details Of Cutting Devices (AREA)

Claims (9)

  1. Machine de coupe à tambour comprenant un tambour rotatif (14) et une pluralité de couteaux (20) disposés le long du contour du tambour rotatif (14), la surface d'enveloppe du tambour rotatif (14) étant pourvue d'une pluralité d'alésages (17), une partie de support (23) adaptée au contour du tambour rotatif (14) étant prévue, laquelle présente, pour chacun des couteaux (20), deux surfaces d'appui (24, 25) définissant la position de l'arête de coupe, caractérisée en ce qu'un contact plan est produit entre les surfaces d'appui (24, 25) et les deux surfaces (26, 27) du couteau (20) adjacentes à l'arête de coupe.
  2. Machine de coupe à tambour selon la revendication 1, caractérisée en ce que deux parties de support (23) sont prévues, et en ce que les parties de support (23) sont disposées à côté des surfaces frontales du tambour rotatif (14).
  3. Machine de coupe à tambour selon la revendication 1 ou 2, caractérisée en ce qu'aucun contact avec les surfaces d'appui (24, 25) n'existe dans une partie des surfaces (26, 27) directement adjacente à l'arête de coupe (28).
  4. Machine de coupe à tambour selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la partie de support (23) présente une contre-dépouille (30) dans la direction radiale, laquelle est saisie par l'arrière par un élément de fixation (29) d'un couteau.
  5. Machine de coupe à tambour selon la revendication 4, caractérisée en ce que la contre-dépouille (30) s'étend parallèlement au contour du tambour rotatif (14).
  6. Machine de coupe à tambour selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la partie de support (23) est une composante d'un composant structurel (19) constitué de deux plaques latérales et d'une plaque intermédiaire (22), les plaques latérales étant retenues à distance l'une de l'autre par la plaque intermédiaire (22).
  7. Machine de coupe à tambour selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'il est prévu une boîte à couteaux (18) remplaçable en tant qu'unité, qui comprend la partie de support (23) ainsi que les couteaux (20) fixés sur celle-ci.
  8. Machine de coupe à tambour selon la revendication 7, caractérisée en ce qu'un ensemble de boîtes à couteaux (18) devant être utilisées en alternance est prévu, les couteaux (20) des différentes boîtes à couteaux (18) ayant des angles d'attaque différents.
  9. Boîte à couteaux pour une machine de coupe à tambour comprenant deux parties de support (23) adaptées au contour du tambour rotatif (14) d'une machine de coupe à tambour, qui sont disposées à une distance l'une de l'autre adaptée à la longueur du tambour rotatif (14) et comprenant une pluralité de couteaux (20) qui sont à chaque fois fixés au niveau des deux parties de support (23), chacune des parties de support (23) présentant deux surfaces d'appui (24, 25) définissant la position de l'arête de coupe, caractérisée en ce qu'un contact plan est produit entre les surfaces d'appui (24, 25) et les deux surfaces (26, 27) du couteau (20) adjacentes à l'arête de coupe.
EP12170395.3A 2011-06-03 2012-06-01 Machine de coupe à tambour et boîte à couteaux pour une machine de ce type Active EP2529834B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011105321.6A DE102011105321B4 (de) 2011-06-03 2011-06-03 Trommelschneidemaschine und Messerkorb für eine solche Maschine

Publications (3)

Publication Number Publication Date
EP2529834A2 EP2529834A2 (fr) 2012-12-05
EP2529834A3 EP2529834A3 (fr) 2015-11-11
EP2529834B1 true EP2529834B1 (fr) 2017-05-31

Family

ID=46318870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12170395.3A Active EP2529834B1 (fr) 2011-06-03 2012-06-01 Machine de coupe à tambour et boîte à couteaux pour une machine de ce type

Country Status (4)

Country Link
US (1) US10421076B2 (fr)
EP (1) EP2529834B1 (fr)
CA (1) CA2779188C (fr)
DE (1) DE102011105321B4 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9682488B2 (en) * 2013-01-15 2017-06-20 Barry Beyerlein Double-barrel trimmer for plant materials
EP3476486B1 (fr) 2017-10-30 2020-07-01 Bühler AG Dispositif et procédé de broyage de granules en vrac

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US540570A (en) * 1895-06-04 Grate for cotton-lappers
NL106992C (fr)
US792485A (en) * 1905-01-14 1905-06-13 Williams Patent Crusher & Pulv Cage for shredding-machines.
US1182575A (en) * 1915-09-07 1916-05-09 Saco Lowell Shops Grid for pickers, openers, and allied machines.
US1170389A (en) * 1915-10-27 1916-02-01 Linus D Armstrong Cotton-picker.
US1423867A (en) * 1921-12-27 1922-07-25 Mitts & Merrill Cutting machine
CH106992A (de) 1923-10-19 1924-10-01 Mij Tot Exploitatie Van Bartma Vorrichtung zum Zerschneiden von Körnergut, insbesondere Brotgetreide in dünne Scheibchen.
US1670812A (en) * 1924-02-18 1928-05-22 Kipp Kelly Ltd Rotary oatmeal cutter
GB235120A (en) * 1924-09-23 1925-06-11 Robin Hood Mills Ltd Improvements in groat cutting machines
US1672945A (en) 1926-03-26 1928-06-12 Jr Theodore Kipp Groat cutter
US1744169A (en) * 1926-03-26 1930-01-21 Jr Theodore Kipp Groat cutter
US2215226A (en) * 1939-04-17 1940-09-17 Gruendler Crusher And Pulveriz Louver plate screen for mills
US5402948A (en) * 1993-04-30 1995-04-04 Kaczmarek; Al Comminuting device with face
US5526988A (en) * 1994-11-29 1996-06-18 Rine; James Comminuting apparatus with tangentially directed discharge
US5779167A (en) * 1996-02-15 1998-07-14 New Holland North America, Inc. Forage harvester knife and mounting apparatus
US6431479B1 (en) 2000-05-05 2002-08-13 Quaker Oats Company Rotary granular material cutters
US6536691B2 (en) * 2001-02-23 2003-03-25 Leprino Foods Company Apparatus for and method of shredding a product
DE102009046808A1 (de) * 2009-11-18 2011-05-19 Deere & Company, Moline Häckseltrommel für einen Feldhäcksler

Also Published As

Publication number Publication date
EP2529834A3 (fr) 2015-11-11
CA2779188A1 (fr) 2012-12-03
US10421076B2 (en) 2019-09-24
DE102011105321A1 (de) 2012-12-06
CA2779188C (fr) 2018-02-27
US20120305689A1 (en) 2012-12-06
DE102011105321B4 (de) 2018-08-30
EP2529834A2 (fr) 2012-12-05

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