EP3838522A1 - Couteau, machine à découper équipée d'un tel couteau ainsi que procédé de fonctionnement d'une machine à découper - Google Patents

Couteau, machine à découper équipée d'un tel couteau ainsi que procédé de fonctionnement d'une machine à découper Download PDF

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Publication number
EP3838522A1
EP3838522A1 EP20209141.9A EP20209141A EP3838522A1 EP 3838522 A1 EP3838522 A1 EP 3838522A1 EP 20209141 A EP20209141 A EP 20209141A EP 3838522 A1 EP3838522 A1 EP 3838522A1
Authority
EP
European Patent Office
Prior art keywords
knife
cutting edge
shaped
area
plane
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.)
Pending
Application number
EP20209141.9A
Other languages
German (de)
English (en)
Inventor
Martin Mayr
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.)
TVI Entwicklung and Produktion GmbH
Original Assignee
TVI Entwicklung and Produktion 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 TVI Entwicklung and Produktion GmbH filed Critical TVI Entwicklung and Produktion GmbH
Publication of EP3838522A1 publication Critical patent/EP3838522A1/fr
Pending legal-status Critical Current

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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
    • 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
    • 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
    • B26D1/01—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 involving a cutting member which does not travel with the work
    • B26D1/12—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 involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—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 involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/143—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 involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis
    • 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
    • B26D2001/0053—Cutting members therefor having a special cutting edge section or blade section
    • 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

Definitions

  • the invention relates to the cutting of an item to be cut into slices, especially slices of exact weight, which should be cut off as cleanly as possible.
  • An irregularly shaped cut product such as a grown piece of meat does not have these properties, however, because each of these irregular pieces of meat has a different shape and also a cross-section that changes over the length and can also consist of materials of different consistency, hardness and elasticity, for example from the Fat, the pure muscle meat and / or the surrounding silver skin.
  • the product to be cut is referred to as a piece of meat, without restricting the invention to meat as the product to be cut, so that it can also be irregular and undefined shaped pieces made of a different material.
  • a relation can then be established between the adjustable thickness of the disk and the weight of the disk using its specific weight, which is generally known or can be estimated.
  • the quality of the cut for example a fray-free cutting edge of the slice, a constant slice thickness over its entire surface, etc. - the better, the less pressure in the direction of penetration the knife dips into the material to be cut, the less resistance there is The material to be cut is opposed to the knife and, in this context, the more the cut is a pulling cut, i.e. the greater the pulling factor is.
  • the pull factor is understood to mean the relation between the penetration speed perpendicular to the cutting edge at the penetration point and the circumferential speed of the knife along the knife edge, especially when the cutting edge comes into contact for the first time.
  • a generic, rotatable or rotating knife is usually plate-shaped or slightly cup-shaped and has on its peripheral edge - usually viewed in the axial direction, i.e. on the main plane of the knife - a curved peripheral edge that is at least partially designed as a cutting edge , i.e. when viewed in the radial cross-section, tapers to the outside at an acute-angled cutting angle which is usually greater than 20 °.
  • the knife is generally only sharpened from one side, which is defined here as the rear. From the knife plane, which is defined by the cutting edge, this ground surface, which is part of the rear side, rises radially inwards at an acute cutting angle.
  • this ground surface is usually adjoined radially inward by a connection surface which is also at an acute angle to the knife plane, which, however, is less than the cutting angle.
  • a regrinding area of the knife adjoins this ground surface radially inwards as a connection surface, over the entire radial extent of which the knife has the same thickness.
  • This connection surface therefore runs parallel to the plane of the knife.
  • the regrinding area extends in the circumferential direction, preferably along the entire length of the cutting edge.
  • the knife when regrinding the ground surface - provided this is done at the same cutting angle that the ground surface assumed from the beginning to the knife plane - the thickness of the knife in the area of the ground surface and the regrind area does not change, and thus also not the radial extent the ground surface, so that over the entire regrinding area and thus regardless of the state of wear, the knife always has the same parameters and relationships in terms of cutting angle, radial extent of the ground surface, thickness of the knife, in particular at the transition between the ground surface and the connecting surface adjoining it radially inward, owns.
  • the regrinding area is thus arranged radially between the grinding surface and a further connection surface, and in particular directly adjoins at least one of them, in particular both of them.
  • the same or constant thickness is understood to mean a thickness with deviations that are unavoidable in the context of the manufacturing process of the knife, in particular that the thickness in the regrinding area is less than 0.5 mm, better by less than 0.3 mm , better by less than 0.2 mm, better by less than 0.1 mm between the largest and smallest thickness of the knife in this regrinding area.
  • the thickness of the knife should in any case only be a maximum of 2 mm, better only a maximum of 1.5 mm, better, only a maximum of 1.1 mm.
  • the radial extension of the regrinding area is a maximum of 20 mm, better only a maximum of 15 mm, better only a maximum of 11 mm.
  • the recess on the concave front side of the knife preferably only begins radially within the regrinding area, so that the front side of the knife in the regrinding area and up to the cutting edge is possibly a flat surface .
  • the adhesive forces that occur between the material to be cut and knife or disk and knife are still so low that clean cutting, i.e. in particular without fringes on the cut edges of the disk, and clean storage are achieved can.
  • connection surface which in the radial direction preferably again runs at an angle to the knife plane and thus increasingly moves away from the knife plane in the radial inward direction and serves as a deflection shoulder, which the outer circumference arriving there of the severed disc is directed away from the knife plane in the axial direction and is intended to cause a defined ejection.
  • this deflector shoulder also extends in the circumferential direction over the entire length of the cutting edge.
  • the deflecting shoulder can bridge the distance in the axial direction between the creeping area and a further inner connection surface, which is further inward and axially further spaced from the knife plane, or can even protrude over the radially outer edge of this next connection surface in the axial direction and one Form deflection bead in order to ensure sufficient axial extension of the deflection shoulder.
  • connection surface can run parallel to the knife plane or be inclined in relation to this, that is to say run radially inward with increasing distance from the knife plane, or it can also have any other configuration.
  • the deflector shoulder cut in the radial direction has a larger deflection angle to the knife plane than the ground surface, i.e. than the cutting angle, which is usually greater than 20 °, because the disc is primarily through this deflector shoulder in the axial direction should be deflected and less by the grinding surface.
  • connection surfaces spaced apart from one another in the radial direction at different distances from the knife plane - regardless of whether the connection surfaces are parallel or inclined to the knife plane - one can each be designed as a deflector shoulder, as described above.
  • the above-described design of the knife can be present both in the case of a sickle-shaped knife in which the outer circumferential contour of the knife, designed as a cutting edge, increases in the circumferential direction counter to the direction of rotation of the knife in its operation, and in the case of a knife with a circular ring-shaped circumferential, annularly closed or only extending over a segment cutting edge, so in particular a circular disk-shaped knife.
  • a circular disk-shaped knife can be plate-shaped, that is to say in particular with a flat front side, or shell-shaped, with a recess concave in the center in the front side of the knife.
  • a slicing machine known per se, in which the knife according to the invention can also be used, comprises a cutting unit which has such a knife as described above, the axis of rotation of the knife depending on the basic shape of the knife - sickle-shaped or circular disk-shaped cutting edge , i.e. the knife axis, stands still during operation or has to be moved for immersion in the material to be cut.
  • the support surface for the item to be cut preferably obliquely downwards towards the cutting unit is arranged inclined to the horizontal.
  • the aim is to achieve the highest possible pull factor of the pulling cut, at least when the knife makes contact with the material to be cut at the contact point.
  • this can be achieved by appropriately shaping the cutting edge in relation to the contact point between the sickle-shaped knife and the material to be cut, which is dependent on the shape of the product and the support position.
  • the knife axis is displaced during operation, usually displaced in an oscillating manner, the return stroke serving, viewed in the feed direction, that the knife is completely out of the path of movement to bring the food to be sliced forward.
  • the movement of the knife should be controlled in such a way that, for the immersion of the knife into the material to be cut, the cutting edge comes into contact with the material to be cut as soon as possible after the knife has reached the position furthest away from the product support.
  • the speed in the plunge direction i.e. perpendicular to the cutting edge, is lower, the shorter the time span available for the acceleration in this plunge direction and so that the shorter the path from the reversal point of the knife axis to the contact of the material to be cut through the cutting edge.
  • the oscillating movement of the knife axis can also be stopped at the reversal point, or the movement of the knife axis can be slowed down in the area of the reversal point.
  • the cutting edge should be no more than 50 mm, better no more than 30 mm, better no more than 20 mm from the circumference of the material to be cut in order to achieve the desired low penetration speed.
  • FIGS. 1a and 2a show slicing machines according to the prior art, the front views according to FIG Figures 2a , b the inventive design of the knife 3 is already shown, the cross section of which is based on the Figures 3 - 3c will be explained in more detail.
  • the slicing machines according to the Figures 1a , b , 2a , b have on the one hand - in addition to the base frame 13 of the machine - a cutting unit 2, which also includes the rotating knife 3, as well as an inclined downwards towards the knife 3 Directed product support 12 ', on which the product P to be sliced, in particular a grown piece of meat, rests and is pushed forward in cycles for cutting into slices S.
  • the product support 12 is not a simple support surface, but a circumferentially closed shaped tube 12, which is open on both sides and in which the product P is not only pushed forward from a longitudinal one for cutting open -Press ram 14, but can also be pressed in the longitudinal direction beforehand by this longitudinal press ram 14 so that the product P has a uniform cross-section over its length by resting against the inner circumference of the molded tube cavity 15.
  • the stop plate 16 can serve as a stop in the longitudinal pressing direction 10 for pressing, which can be set to a certain thickness setting d in the form of a distance in the longitudinal pressing direction 10 to the front end, the cutting end 12a of the shaped tube 12, for cutting off the slices S is.
  • the stop plate 16 can also be used as a longitudinal stop when pressing the product P by placing it directly on the front face of the molded tube 12, since the stop plate 16 has a size that corresponds to the cross section of the molded tube cavity 15 at the cutting end 12a can cover completely.
  • the stop plate 16 can either be attached to the base frame 13 and its axial position can be adjusted according to FIG Figure 1a or attached to the knife carrier 2a, as in FIG Figure 1b shown.
  • the knife 3 is a sickle knife 3 according to FIG Figure 1a , 2a or a circular disk-shaped knife according to Figure 1b , 2 B acts:
  • the outer circumferential edge, designed as a cutting edge 3a has an increasing distance in the course direction from the axis of rotation 3 '. This greatest distance is at the end of the cutting edge 3a between the cutting edge 3a and the axis of rotation 3 'so much larger than the smallest distance between the axis of rotation 3' and the part of the circumference that is not designed as a cutting edge 3a than the radial extension of the molded tube cavity 15 or the product P.
  • this knife axis 3' does not have to be moved for the cutting off of slices S, in contrast to the Figures 1a , 2a , in which the circular disk-shaped knife 3 only comes out of the overlap with the molded tube cavity 15 by moving the entire knife 3 including the knife axis 3 'in an oscillating manner in the penetration direction 9 towards the molded tube 12 that the molded tube cavity 15 located completely within the flight circle as well as the real knife 3.
  • the latter is particularly important if, instead of a circular disk-shaped knife, it is a circular segment-shaped knife in which the cutting edge 3a, which is concentric to the knife axis 3 ', extends only over part of the circumference.
  • a slicing machine 1 with two parallel shaped tube cavities 15, here formed in a single shaped tube 12 is shown, the knife 3 each having a disc S during a separation process from both products P located in the two shaped tube cavities 15 cuts off, in which it has a correspondingly large diameter or flight circle.
  • Figure 1b with a circular disc-shaped knife 3 or a circular segment-shaped knife 3 of the knife carrier 2a, in which the knife axis 3 'of the knife 3 is mounted, in a first transverse direction 11.1 to the longitudinal pressing direction 10 relative to the base frame 13 of the slicing machine 1 and displaceable in an oscillating manner drivable.
  • the stop plate 16 is also attached to the knife carrier 2a, since it should move in an oscillating manner together with the knife 3 in the first transverse direction 11.1, the penetration direction 9, which in this case runs perpendicular to the cutting edge tangent 8.
  • FIG. 3 shows a sickle-shaped knife 3 in a radial section which runs through the knife axis 3 '.
  • the region near the cutting edge 3a that is relevant for the present invention is, however, the same in this sectional illustration in the case of a sickle-shaped knife and a circular disk-shaped or circular segment-shaped knife, as enlarged in FIG Figure 3a shown of what Figure 3b again shows an enlargement near the cutting edge 3a, to be precise during the severing of a disk S.
  • the plate-shaped knife 3 has a cutting edge 3a in the form of a sharply ground outer peripheral edge, with the grinding taking place only from one side: Therefore, the cutting edge 3a is formed by the knife front side 3.1, which is flat in the radially outermost area and thus also lies in the knife plane 3 ′′, on the one hand and the inclined grinding surface 4 on the other, which runs along the
  • the circumference extends and along the circumference preferably everywhere the same cutting angle ⁇ with respect to the knife plane 3 ′′ and in the plan view, ie viewed in the direction of the knife axis 3 ', also the same width, as best in the Figures 2a , b to recognize.
  • connection surface 5 which extends radially further inward over a so-called regrinding area 4 *.
  • this first connection surface runs parallel to the front side 3.1 of the knife, i.e. the knife 3 has the same thickness D everywhere in the radial direction along the regrinding area 4 * both in the radial direction and in the circumferential direction within this regrinding area 4 *.
  • connection surface 5 - which is an annular or partially annular surface - a further connection surface 5.1 is arranged, which in this case in turn runs parallel to knife plane 3 ′′, ie mostly also the front side 3.1 of the knife, but maintains a greater axial distance from this than the connection surface 5, which is located in the regrinding area 4 *.
  • a deflector shoulder 6 ′′ which is at a deflection angle ⁇ to the knife plane 3 ′′, progressively in the radial direction.
  • This deflection shoulder 6 ′′ serves to ensure that the disc S separated from the cutting edge 3a - as better in FIG Figure 3b to recognize - is not only deflected by the grinding surface 4 alone from the knife plane 3 "and is deflected somewhat in the axial direction 10, but is supported here by the deflector shoulder 6", which at least with its upper edge also on the already separated Disk S rests and this further deflects in the axial direction 10, in the direction of the knife axis 3 '.
  • the pane S is thrown onto the intended point of impact, which is usually located on a conveyor or in a collecting tray.
  • the deflector shoulder 6 ′′ can also be made axially longer than the axial difference between the two adjoining connection surfaces 5 and 5.1 would allow, with the deflector angle ⁇ unchanged, in that the deflector surface 6 ′′ even extends over in the axial direction the radially outer edge of the radially inner adjoining next connection surface 5.1 extends out and forms a deflecting bead 6, which runs parallel and concentrically to the cutting edge 3a along, as a rule, its entire extent.
  • connection surface 5 which defines the regrinding area 4 *, radially inwardly further connection surface 5.1, 5.2, 5.3.
  • connection surfaces from 5.1 can run parallel to the knife plane 3 ′′ or be inclined to it, that is, radially inward towards the knife axis 3 ′ with increasing distance from the knife plane 3 ′′.
  • the deflecting shoulder 6 ′′ between the individual connection surfaces need not be designed as a deflecting bead.
  • the deflection angle ⁇ is usually greater than the cutting angle ⁇ .
  • the knife 3 can also have a concave recess 7 and on its front surface 3.1 so that a cup-shaped knife can be said as seen radially from outside to inside the recess 7 is preferably of the regrinding zone 4 * starting from the radially inner end thereof until further inward , in this case at the connection surface 5.2, in order not to allow the thickness of the knife 3 to drop below a predetermined knife thickness in any radial area

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food-Manufacturing Devices (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP20209141.9A 2019-12-16 2020-11-23 Couteau, machine à découper équipée d'un tel couteau ainsi que procédé de fonctionnement d'une machine à découper Pending EP3838522A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019134530.8A DE102019134530A1 (de) 2019-12-16 2019-12-16 Messer, damit ausgestattete Aufschneide-Maschine sowie Verfahren zum Betrieb der Aufschneide-Maschine

Publications (1)

Publication Number Publication Date
EP3838522A1 true EP3838522A1 (fr) 2021-06-23

Family

ID=73544009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20209141.9A Pending EP3838522A1 (fr) 2019-12-16 2020-11-23 Couteau, machine à découper équipée d'un tel couteau ainsi que procédé de fonctionnement d'une machine à découper

Country Status (4)

Country Link
US (1) US11667047B2 (fr)
EP (1) EP3838522A1 (fr)
CN (1) CN215202181U (fr)
DE (1) DE102019134530A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022113920A1 (de) 2022-06-02 2023-12-07 Multivac Sepp Haggenmüller Se & Co. Kg Messer, Schneideinheit sowie Aufschneide-Maschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015059016A1 (fr) * 2013-10-24 2015-04-30 Gea Food Solutions Germany Gmbh Lame et procédé d'affûtage
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 (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2472876A (en) * 1944-04-21 1949-06-14 Us Slicing Machine Co Rotary disk knife
DE102004016615A1 (de) * 2004-04-03 2005-10-27 Reifenhäuser, Uwe Messer für eine motorgetriebene Schneidmaschine
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
DE102017112177B4 (de) * 2017-06-02 2023-11-23 Tvi Entwicklung Und Produktion Gmbh Schneideinheit sowie Schneidverfahren
DE102017112178A1 (de) * 2017-06-02 2018-12-06 Tvi Entwicklung Und Produktion Gmbh Schneidvorrichtung sowie Schneidverfahren
US20190160697A1 (en) * 2017-11-27 2019-05-30 Henry Johnson Pty Ltd As Trustee For The Henry Johnson Family Trust Low Sticking Friction Knife Blade and Methods of Manufacturing Same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015059016A1 (fr) * 2013-10-24 2015-04-30 Gea Food Solutions Germany Gmbh Lame et procédé d'affûtage
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
US11667047B2 (en) 2023-06-06
DE102019134530A1 (de) 2021-06-17
CN215202181U (zh) 2021-12-17
US20210178620A1 (en) 2021-06-17

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