EP3747607A1 - Couteau, en particulier pour une machine à trancher - Google Patents

Couteau, en particulier pour une machine à trancher Download PDF

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Publication number
EP3747607A1
EP3747607A1 EP20176713.4A EP20176713A EP3747607A1 EP 3747607 A1 EP3747607 A1 EP 3747607A1 EP 20176713 A EP20176713 A EP 20176713A EP 3747607 A1 EP3747607 A1 EP 3747607A1
Authority
EP
European Patent Office
Prior art keywords
cutting
knife
cutting edge
recess
better
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
EP20176713.4A
Other languages
German (de)
English (en)
Other versions
EP3747607B1 (fr
Inventor
Dominic Koch
Oliver MÜLLER
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.)
Multivac Sepp Haggenmueller GmbH and Co KG
Original Assignee
Multivac Sepp Haggenmueller GmbH and Co KG
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 Multivac Sepp Haggenmueller GmbH and Co KG filed Critical Multivac Sepp Haggenmueller GmbH and Co KG
Publication of EP3747607A1 publication Critical patent/EP3747607A1/fr
Application granted granted Critical
Publication of EP3747607B1 publication Critical patent/EP3747607B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • B26D7/32—Means for performing other operations combined with cutting for conveying or stacking cut product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/28—Splitting layers from work; Mutually separating layers by cutting
    • B26D3/283—Household devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0046—Cutting members therefor rotating continuously about an axis perpendicular to the edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/28—Splitting layers from work; Mutually separating layers by cutting
    • B26D3/283—Household devices therefor
    • B26D2003/285—Household devices therefor cutting one single slice at each stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/02—Machines or methods used for cutting special materials for cutting food products, e.g. food slicers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0608—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by pushers

Definitions

  • the invention relates to knives, in particular rotating knives, in particular rotating sickle knives, such as are used above all in slicers for cutting sausage, cheese or other strand-like, elastic food products.
  • the problem here is that the thin and very elastic disks temporarily adhere to the back of the knife facing the disk when they are cut off and therefore do not lie flat when they are separated and thrown onto a base, but instead form waves or folds or do not meet the desired target Position on the mat.
  • a cutting device such as a slicer, which cuts strand-like elastic products such as sausage or cheese, so-called caliber, into slices at high speed, usually has a base frame on which a product holder is attached on the one hand, on which the product to be sliced or the product strand is fed to the cutting point is, and on the other hand a rotating knife which successively separates slices from the strand at the cutting point.
  • the knife especially in the slicers used today, is usually a rotating knife, usually a so-called sickle knife, which, however, in contrast to a sickle, does not have the cutting edge on the concave inner contour but on the convex outer contour, which is due to the direction of rotation of the sickle knife
  • the front edge of the knife body is.
  • the cutting edge points in a direction in which this cutting edge extends, the so-called cutting direction a distance which increases continuously, in particular continuously increases, from the axis of rotation, which distance can also have the shape of a geometric spiral around the axis of rotation of the sickle blade.
  • the knife is in the shape of a circular disk with an annularly closed, in particular circularly closed, endless cutting edge on the outer circumference, then the axis of rotation of the knife must be moved during cutting operation, in particular moved back and forth in an oscillating manner, in order to cut the slices.
  • the known knives are plate-shaped and have a cross-section that is curved outward on one side, the back of the knife, from the cutting plane defined by the cutting edge, while the knife on the front of the knife - the one in the cutting device of the product receptacle, that is, the strand of the product lying on it, facing - as a rule does not protrude beyond the cutting plane.
  • the cutting edge is formed in cross section through the basic body of the knife by a front cutting surface, which can for example be flat, but, e.g. set back radially from the cutting edge, can also have a front side recess, and a rear cutting surface, the two cutting surfaces extending at an acute-angled cutting angle to each other.
  • a front cutting surface which can for example be flat, but, e.g. set back radially from the cutting edge, can also have a front side recess, and a rear cutting surface, the two cutting surfaces extending at an acute-angled cutting angle to each other.
  • the inner end of the cutting surface facing away from the cutting edge is followed by a pressure surface, which is also part of the curved rear of the knife, but extends to the cutting plane at a pressure angle that is smaller than the cutting angle.
  • the inner end of the pressure surface facing away from the cutting edge is followed by the mostly flat, remaining knife back of the plate-shaped knife, which in this central area usually has a uniform thickness, apart from the front-side recess that may be present on the knife front.
  • At least one recess is arranged in the arched back of the knife in order to minimize the sticking of the disc which is in separation to the back of the knife, in particular its pressure surface.
  • This at least one recess is adapted to the properties of the product and can also depend on various parameters of the cutting device in which this knife is used, for example the material and the roughness of the outside of the knife, the cutting speed and other parameters.
  • One possibility of adapting to such parameters is to vary the size and / or the shape of the cross-sectional area of the recess lying transversely, in particular perpendicular, to the cutting plane and / or transversely, in particular perpendicular, to the direction of the cutting edge in the direction of the cutting edge, in particular with a sickle-shaped knife.
  • Another possibility is to vary the position, in particular the radial distance, of the recess from the cutting edge in the direction of the cutting edge.
  • the width of the cutting surface - depending on the state of wear - is only about 0.5 mm to 2 mm anyway, while the pressure surface in this direction is at least 10 times, possibly even at least 15 times as wide.
  • the cutting angle is in the order of 30 °, while the pressure angle is only around 20 °.
  • a parameter to be taken into account is the high speed of such knives in so-called slicers, which is at least 500 revolutions per minute, which in the case of a sickle-shaped knife with a maximum radius of, for example, 50 cm, a very considerable penetration speed of the cutting edge causes in the product.
  • the at least one recess is preferably a hollow groove, which extends with its main direction of extent, ie primarily, along the direction of the cutting edge, but preferably at a distance therefrom.
  • the bottom of the fillet preferably has a uniform curvature transversely to its main extent, so that the fillet can be produced in a simple manner by grinding with a round grinding disk.
  • the recess extends in the direction of the cutting edge preferably at most to the transition from the pressure surface to the cutting surface, that is to say the rear cutting surface which is formed on the rear of the knife.
  • the recess does not change when the cutting surface is regrinded, especially if there is a distance between the cutting surface and the recess of at least 1 mm, better at least 2 mm, when the knife is new.
  • the at least one recess in particular in the form of a groove, can also extend only along part of the extension of the cutting edge parallel to it, with a finite cutting edge preferably not having any recess in the starting area and end area along the extension of the cutting edge is.
  • the size in particular the width measured transversely to the direction of the cutting edge, and / or the shape viewed in the plan view of the cutting plane and / or the cross-sectional shape and / or the radial position of the recess relative to the axis of rotation in the direction of the cutting edge can be constant, in particular with circular disc-shaped knives.
  • these parameters can change along the direction of the cutting edge, in particular increase or decrease continuously along the direction.
  • depressions are arranged one behind the other in the direction of the cutting edge, they can each be of identical design, in particular in the case of a circular disk-shaped knife.
  • the depressions are preferably designed differently, with design parameters of the depressions preferably increasing or decreasing continuously in a direction along the direction of the cutting edge.
  • the thickness of the basic body of the knife is a maximum of 15 mm, better a maximum of 12 mm, better a maximum of 8 mm.
  • the maximum depth of the depression should be no more than 2 mm, better no more than 1 mm, better no more than 0.5 mm, better no more than 0.3 mm.
  • the depth of the depression should be a maximum of 20%, better a maximum of 10%, better a maximum of 5%.
  • this value can steadily increase or steadily decrease along the direction of the cutting edge, preferably continuously.
  • the at least one depression When viewed from above on the pressure surface, the at least one depression should reach up to the cutting surface over at least part of its extension in order to avoid a pressure surface running continuously along the cutting surface in the direction of the cutting edge, which would encourage the disc to start sticking.
  • the width of the recess should be at least 30%, better at least 50%, better at least 70% of the width of the printing surface in this direction, in order to achieve a sufficient effect.
  • the desired effect in the inventive design of the depressions in the rear of the knife occurs to a sufficient extent, preferably when the speed of the cutting blade is at least 500 rpm, better at least 700 rpm, better at least 1000 rpm, better at least 1200 rpm.
  • Figure 1a shows a conventional slicer 20 as a cutting device for cutting a strand-like product P into slices S.
  • the rope-like product P rests on a product support 22, for example a sliding surface or a roller conveyor, which is usually inclined downwardly towards the knife 1, and is pushed from the rear end by a slide 24 resting there, usually in steps, pushed forward, but also prevented from sliding forward too quickly by means of retaining claws 25.
  • a product support 22 for example a sliding surface or a roller conveyor, which is usually inclined downwardly towards the knife 1, and is pushed from the rear end by a slide 24 resting there, usually in steps, pushed forward, but also prevented from sliding forward too quickly by means of retaining claws 25.
  • the overhang of the caliber P protruding from the cutting goggles 23 is cut off immediately in front of the cutting face of the cutting goggles 23 facing away from the slide 24 by a rotating, sickle-shaped knife 1 along a cutting plane 1 ′′ as a disk S with a thickness D and mostly falls onto one conveyor not shown.
  • the base body 1b of the plate-shaped knife 1 tapers to a point along its outer circumference when viewed in cross-section, the acute-angled cutting edge 1a being formed by the rear cutting surface 2 present on the knife rear 1.2 and the front cutting surface 3 present on the knife front 1.1 becomes.
  • a front side recess 6 can be present, which can extend with its outer flank 6a to the cutting edge 1a, so that then the cutting edge 1a from the rear cutting surface 2 and the outer Flank 6a of the recess 6 can be formed.
  • the cutting edge 1a running around in a plane defines a cutting plane 1 ".
  • the rear cutting surface 2 is inclined to the cutting plane 1" at a cutting angle ⁇ . On the side of the rear cutting surface 2 facing away from the cutting edge 1 a, this is adjoined by the flatter surface than the cutting surface 2 Cutting plane 1 ′′ at a pressure angle ⁇ to cutting plane 1 ′′, which is intended to push the severed disk S away from cutting plane 1 ′′.
  • FIG. 2 shows in an analog representation according to FIG Figure 1c the inventive design of the knife 1:
  • a recess 5 is arranged in the pressure surface 4, the cross-sectional contour of which - in a section perpendicular to the direction of the cutting edge 1a, the viewing direction of the Figure 2 - represents a segment of a circle, so the bottom of the recess 5 represents part of an arc with the center 7, mainly because the recess 5 can then be produced with a round, rotating grinding wheel 8 indicated by dashed lines, the axis of rotation of which is preferably in the viewing direction the Figure 2 , ie the direction 9 of the cutting edge 1a runs through the in Figure 2
  • the center 7 of the circular arc of the recess 5 is shown.
  • the recess 5 extends up to the transition between the pressure surface 4 and the rear cutting surface 2, but could also be arranged at a distance from this.
  • the recess 5 does not reach the end of the pressure surface 4 there, but rather its extension in this direction is approximately 60% of the width B measured in this direction of the pressure surface 4, but is about 10-15 times the width b of the rear cutting surface 2 in this direction.
  • the clearance angle a at which the flanks of the recess 5, in particular the flank pointing in the direction of the cutting edge 1a, open into the surrounding pressure surface 4 is a maximum of 3 °, better a maximum of 2 °, and the transition can also be rounded. This prevents damage to the cut surface on the product P, in particular on the disc S.
  • FIG Figures 3a - c The design of the recess 5 in the plan view of the knife rear side 1.2, in particular along the circumferential direction 9 of the knife 1, is shown in FIG Figures 3a - c but different:
  • the width BV of the recess 5 measured along the pressure surface 4 and perpendicular to the cutting edge 1a, remains constant in the circumferential direction 9, and in particular only increases at the beginning and decreases again at the end, whereby the radially outer edge of the recess 5 also increases or decreases with increasing or decreasing width BV always runs at the same distance 12 from the cutting edge 1a, and in particular up to the transition, usually a kink, between the pressure surface 4 and the rear cutting surface 2 or, in contrast, maintains a distance 12, as in the upper region of the Figure 3a shown.
  • the recess 5 has an increasing width BV, in particular a continuously increasing width BV, in the cutting direction 9.1, that is to say the circumferential direction with increasing distance of the cutting edge 1a from the axis of rotation 1 '.
  • the recess 5 also extends over the entire circumferential length parallel to the cutting edge 1a, but this is not a condition for a design with a width BV increasing in the circumferential direction.
  • a plurality of depressions 5 are arranged one behind the other at a distance from one another in the circumferential direction 9, which in this case are of identical design, but this is not a requirement for this design with several depressions 5 arranged one behind the other.
  • these depressions 5 have, at least in their central region in the circumferential direction 9, a constant width BV measured perpendicular to the cutting edge 1a along the pressure surface 4, which becomes smaller and smaller at the beginning and end and ends.
  • the distance between the radially inner edge of the depressions and the cutting edge 1a along their direction is preferably always smaller to zero at the beginning and end.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Food-Manufacturing Devices (AREA)
EP20176713.4A 2019-06-03 2020-05-27 Couteau, en particulier pour une machine à trancher Active EP3747607B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019114846.4A DE102019114846A1 (de) 2019-06-03 2019-06-03 Messer, insbesondere für Slicer

Publications (2)

Publication Number Publication Date
EP3747607A1 true EP3747607A1 (fr) 2020-12-09
EP3747607B1 EP3747607B1 (fr) 2024-02-14

Family

ID=70861261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20176713.4A Active EP3747607B1 (fr) 2019-06-03 2020-05-27 Couteau, en particulier pour une machine à trancher

Country Status (3)

Country Link
US (1) US11890773B2 (fr)
EP (1) EP3747607B1 (fr)
DE (1) DE102019114846A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012007250A1 (de) * 2012-04-11 2013-10-17 Weber Maschinenbau Gmbh Breidenbach Schneidmesser
WO2014079575A1 (fr) * 2012-11-21 2014-05-30 Dipl.-Ing. Schindler & Wagner Gmbh & Co. Kg Lame
EP2948279B1 (fr) 2013-01-25 2017-10-11 GEA Food Solutions Germany GmbH Lame de coupe avec angle de coupe variable
DE102016005443A1 (de) * 2016-05-06 2017-11-09 Dipl.lng. S c h i n d l e r & Wagner GmbH & Co KG Schneidmesser, Vorrichtung zum Aufschneiden von Lebensmittelprodukten mit einem solchen Schneidmesser sowie Verwendung und Verfahren zur Herstellung eines Schneidmessers

Family Cites Families (16)

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US2472876A (en) * 1944-04-21 1949-06-14 Us Slicing Machine Co Rotary disk knife
US3532021A (en) * 1968-07-03 1970-10-06 Wallace Murray Corp Cutting knife
CA2049257C (fr) * 1991-08-15 1994-08-02 Julien H. Pleau Scie circulaire a trait minime et guide connexe
US5988033A (en) * 1992-10-29 1999-11-23 Kraft Foods, Inc. Food slicing apparatus, blade and method
CA2160735A1 (fr) * 1994-10-25 1996-04-26 Larry Chester Gundlach Lame pour decouper des aliments en spirale
US7194933B2 (en) * 2002-07-01 2007-03-27 Premark Feg L.L.C. Composite circular slicer knife
DE102004016615A1 (de) * 2004-04-03 2005-10-27 Reifenhäuser, Uwe Messer für eine motorgetriebene Schneidmaschine
US20060021487A1 (en) * 2004-07-30 2006-02-02 William Dickover Serrated blade for slicing machine
DE102009030550A1 (de) * 2009-06-25 2010-12-30 Weber Maschinenbau Gmbh Breidenbach Schneidmesser
DE102011103462A1 (de) * 2011-06-03 2012-12-06 Thomas Völkl Schneidmesser
DE102012007290A1 (de) * 2012-04-12 2013-10-17 Weber Maschinenbau Gmbh Breidenbach Schneidmesser mit Abweiselement
EP2799193A1 (fr) * 2013-05-03 2014-11-05 Brandenburgische Technische Universität Cottbus Lame de trancheur
US20150158194A1 (en) * 2013-12-09 2015-06-11 Knife Solutions, LLC Slicing Blade System
ITUB20154834A1 (it) * 2015-11-03 2017-05-03 Slayer Blades S R L Lama azionabile a rotazione, particolarmente per macchine affettatrici industriali automatiche.
DE102016108274A1 (de) * 2016-05-04 2017-11-09 Maja-Maschinenfabrik Hermann Schill Gmbh & Co. Kg Schneidmesser für Portionier- oder Schneidvorrichtung
DE102018107495B4 (de) * 2018-03-28 2020-03-12 Dienes Werke für Maschinenteile GmbH & Co KG Längsschneidemaschine und Rollenschneidemaschine mit einem Rundmesser mit konzentrischer Materialverjüngung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012007250A1 (de) * 2012-04-11 2013-10-17 Weber Maschinenbau Gmbh Breidenbach Schneidmesser
WO2014079575A1 (fr) * 2012-11-21 2014-05-30 Dipl.-Ing. Schindler & Wagner Gmbh & Co. Kg Lame
EP2948279B1 (fr) 2013-01-25 2017-10-11 GEA Food Solutions Germany GmbH Lame de coupe avec angle de coupe variable
DE102016005443A1 (de) * 2016-05-06 2017-11-09 Dipl.lng. S c h i n d l e r & Wagner GmbH & Co KG Schneidmesser, Vorrichtung zum Aufschneiden von Lebensmittelprodukten mit einem solchen Schneidmesser sowie Verwendung und Verfahren zur Herstellung eines Schneidmessers

Also Published As

Publication number Publication date
EP3747607B1 (fr) 2024-02-14
DE102019114846A1 (de) 2020-12-03
US11890773B2 (en) 2024-02-06
US20200376703A1 (en) 2020-12-03

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