EP3338972A1 - Couteau - Google Patents

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Publication number
EP3338972A1
EP3338972A1 EP17205908.1A EP17205908A EP3338972A1 EP 3338972 A1 EP3338972 A1 EP 3338972A1 EP 17205908 A EP17205908 A EP 17205908A EP 3338972 A1 EP3338972 A1 EP 3338972A1
Authority
EP
European Patent Office
Prior art keywords
cutting
edge
edges
tilt angle
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.)
Granted
Application number
EP17205908.1A
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German (de)
English (en)
Other versions
EP3338972B1 (fr
Inventor
Philip Kahl
Andreas Runkel
Michael Knauf
Thorsten Schneider
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.)
Weber Maschinenbau GmbH Breidenbach
Original Assignee
Weber Maschinenbau GmbH Breidenbach
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=60627552&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3338972(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE102017108841.5A external-priority patent/DE102017108841A1/de
Application filed by Weber Maschinenbau GmbH Breidenbach filed Critical Weber Maschinenbau GmbH Breidenbach
Priority to EP18196630.0A priority Critical patent/EP3459699B1/fr
Publication of EP3338972A1 publication Critical patent/EP3338972A1/fr
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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
    • 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
    • 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
    • B26D2001/006—Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations
    • 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 a cutting blade, in particular a sickle blade or a spiral knife or a circular blade, for a device for slicing food products, in particular for a high-speed slicer, which rotates about a rotation axis during a cutting operation.
  • the knife has a radially outer, effective as a cutting peripheral edge, which has a curved course about the axis of rotation.
  • the cutting blade has a plurality of cutting teeth, which are arranged distributed successively along the peripheral edge, wherein each cutting tooth has a cutting edge, which includes a cutting surface and a cutting edge radially outwardly delimiting cutting edge.
  • Cutting knives with which food products such as in particular sausage, cheese and meat are cut into slices or pieces, are known in a variety of configurations.
  • high-speed slicers with which high cutting speeds of several 100 to several thousand slices per minute are separated from a rope or loaf food product, one differentiates fundamentally between so-called circular knives on the one hand and so-called sickle or spiral knives (in the following simply "sickle knives”). ) on the other hand.
  • Circular knives have a circular edge running around the axis of rotation, wherein a circular blade not only performs a self-rotation about the axis of rotation, but in addition to an eccentric, ie offset parallel to the axis of rotation planetary rotates around the required for the separation of slices cutting movement relative to the product to create.
  • Cutter blades have a blade that also has a curved course about the axis of rotation, but the radius of the blade varies between a smallest radius and a largest radius such that the blade describes a sickle or spiral curve.
  • Crescent knives rotate only about their axis of rotation, where it is the deviating from a circular shape of the cutting edge, which provides the required cutting movement relative to the product.
  • the intended direction of rotation of sickle knives is chosen such that the knife is immersed in the product at a relatively small radius starting circumferential portion of the cutting edge, also referred to as an immersion area, the actual cutting motion for separating a slice or piece from the product therethrough occurs as the radius increases as the knife continues to rotate, and consequently the cutting edge is moved through the product.
  • radius which is not used here in a strictly mathematical sense for a sickle knife, for a path perpendicularly intersecting the axis of rotation of the knife is to be distinguished from the term "radius of curvature".
  • radius of curvature In accordance with the usual convention for defining a tangent at a particular point on a flat curve that is not a circle, the radius of curvature is the radius of contact of the circle of curvature that best approximates the curve at that point. The tangent of the curve at this point is perpendicular to the contact radius of that point.
  • the center of the circle of curvature is not or at least not necessarily on the axis of rotation of the knife.
  • radius and the radius of curvature and thus the tangent at this point and the motion vector of this point are each identical for a particular point on the cutting edge, it depends on the specific design of a sickle blade whether radius and radius of curvature or Tangent and motion vector for a currently considered property of the knife may each be considered to be approximately equal or not.
  • the term "radius” means a distance perpendicular to the axis of rotation of the blade through that point
  • the term “motion tangent” or “motion vector” means a straight line perpendicular to the radius through that point.
  • the terms "radius of curvature” and “tangent” correspond to the above-mentioned convention. In a circular blade, therefore, the radius and the radius of curvature as well as the movement tangent and the tangent are identical.
  • cutting knives for slicing food products both circular knives and sickle knives, either with an untoothed edge or provided with a toothing.
  • cutting knives with teeth are made EP 0 548 615 B1 and FR 2 661 634 A1 known.
  • the object of the invention is to provide or to produce a cutting blade of the type mentioned, ie in particular a circular knife or sickle or spiral knife, with the improved cutting quality can be achieved.
  • the highest possible cutting quality should be achieved over the entire usable for products, also known as the cutting shaft width cutting width of a slicer.
  • the invention is fundamentally applicable both to sickle or spiral knives and to circular knives.
  • each cutting surface is inclined relative to a clamping plane perpendicular to the axis of rotation or a cutting plane, and the inclination of the cutting surfaces varies along the peripheral edge.
  • the cutting plane is to be understood as meaning a plane of the cutting blade which is clearly defined by the knife edge define forming cutting edges of the cutting teeth. In a preferred embodiment of the invention, in which all or at least a plurality of cutting edges lie in a common plane, this plane is the cutting plane.
  • the clamping plane may coincide with the cutting plane defined by the blade of the knife. However, this definition of the clamping level is not mandatory.
  • a clamping plane e.g. also that plane can be referred to, which is defined by the back of a knife base body.
  • the clamping plane is then spaced from the cutting plane ( Case 1) or the clamping plane coincides with the cutting plane (Case 2).
  • the non-zero distance measured between the cutting plane and the plane defined by the rear side of the knife base in the direction of the axis of rotation is also referred to as a gauge.
  • the gauge is in case 2 equal to zero.
  • the actual position of the clamping plane is not decisive, but it is only important that the clamping plane is perpendicular to the axis of rotation runs. Therefore, in the present disclosure, in part, in an alternative to the clamping plane of a "plane parallel to the clamping plane" is mentioned.
  • the direction and the extent of the inclination of the cutting surfaces can basically be selected as a function of different criteria, in particular depending on the properties of the food product to be cut in each case.
  • an adaptation to the positioning of the sliced products with respect to the cutting blade or the axis of rotation of the cutting blade can be done.
  • the inclination can be described as a superposition of a tilt and a position.
  • employed cutting surface is meant here that the cutting surface - more or less pronounced, in particular depending on the size of the gate angle of the cutting edge, see below - points in the intended direction of rotation of the blade.
  • the inclination of a cutting surface incorporating its cutting edge can be defined using a single angle that the cutting surface encloses with the cutting plane.
  • the cutting edge then forms the cutting line between the cutting surface and the cutting plane.
  • This definition constitutes an independent third aspect of the invention (claim 2), for which protection is also claimed separately.
  • This bleed angle can be defined in different ways and represents an independent aspect (claim 5) of the invention for which protection is also claimed separately.
  • each cutting surface inclined relative to the cutting plane by the tilt angle KW and at the same time the cutting edge of each cutting surface has a leading angle, for example, with respect to theabsolusstangente at a defined point of the cutting edge, for example, the rear end of the cutting edge.
  • Different inclinations of the cutting surfaces can thus be achieved, for example, by varying the tilt angle while maintaining the initial angle, or vice versa. Alternatively, it is possible to vary both angles.
  • the respective resulting inclination of a cutting surface can be selected in dependence on the circumferential position at which the relevant cutting tooth is located.
  • either only the tilt angle or only the bleed angle may vary and the other angle may be constant, either zero or nonzero.
  • both angles can vary. Consequently, along the peripheral edge a variety of different angle combinations can be realized.
  • the tilt angle of the cutting surfaces varies along the peripheral edge, wherein the lead angle of the cutting edges, although constant along the peripheral edge, but different from zero.
  • the employees so each having a nonzero different bleed angle having cutting edges of the cutting surfaces can be referred to as a staggered or scale-like arrangement, which is particularly characterized in that between each two successive cutting surfaces a transition is present, which can basically be configured arbitrarily, but preferably always characterized in that in the region of the transition, the two immediately successive cutting surfaces are offset with respect to the axis of rotation against each other.
  • a height offset or a jump exists at a transition from a cutting surface to the cutting surface of a cutting tooth immediately following in the circumferential direction.
  • the cutting quality can be significantly increased if at least some of the cutting edges of the cutting surfaces are provided with a nonzero lead angle, so that - if according to the preferred embodiment of the toothing of directly consecutive cutting teeth whose cutting surfaces are employed in each case - there is a transition identifiable as such between these cutting surfaces.
  • one aspect of the invention (claim 5) relates to the orientation of the cutting edges, which basically can be described and defined independently of the size and orientation of the cutting surfaces and also regardless of whether the cutting surfaces are planar or curved.
  • At least some cutting edges or each cutting edge with a movement tangent includes a lead angle different from zero, the tangent and the radius intersecting at a point of the respective cutting edge, and / or at least some Cutting edges are each oriented such that a seen in the intended direction of rotation front end of the cutting edge on another, preferably a smaller radius than the rear end of the respective cutting edge, and / or that at least some cutting edges or each cutting edge with a connecting path includes a, in particular non-zero, lead angle, wherein the connecting distance the two rear ends or the two front ends of a respective cutting edge and the immediately preceding or connecting subsequent cutting edge with each other.
  • each cutting edge individually - are determined as a respective cutting edge, e.g. in a knife-fixed reference system, is oriented and thus under which orientation the relevant cutting edge cuts into the product to be sliced.
  • a point on the cutting edge is sufficient for a clear definition of its orientation.
  • a midpoint of the cutting edge selected in the definition with regard to the motion vector-insofar arbitrarily-another point of the cutting edge can also be selected, for example one of the two end points of the cutting edge.
  • the definition of the orientation of the cutting edge with respect to the movement tangent, ie to the motion vector, is in principle arbitrary, but offers itself insofar as the motion vector of a point on the cutting edge indicates in which direction this point of the cutting edge at the moment of cutting moved into the product relative to the product.
  • the absolute value of the angle between the cutting edge and the motion vector of a point on the cutting edge depends on what point on the cutting edge is. If in the following absolute values are given for the lead angle, then these relate - as far as the lead angle defined with respect to the motion vector, ie between the Motion vector and the cutting edge is measured - always on the rearward in the direction of rotation of the relevant cutting edge.
  • a stronger "inclination" of the cutting edges is provided in a sickle knife, i. the front end is preferably at a radius which is smaller than the radius at which the front end would lie if the front end and the rear end were located on an imaginary curve corresponding to the cutting edge of a conventional toothless sickle blade.
  • the orientation of the cutting edges can alternatively also be defined so that at least some cutting edges or each cutting edge with a connecting path includes a, in particular non-zero, lead angle, the connecting distance the two rear ends or the two front ends of a respective cutting edge and the immediately connecting preceding or succeeding cutting edge.
  • all rear ends of the cutting edges and / or all front ends of the cutting edges may each lie on an imaginary curve, which is not a circle, which corresponds at least approximately to the cutting edge of a conventional toothless sickle blade.
  • the links together form a polygon that approximates this imaginary curve.
  • the cutting edges of the knife preferably have a "stronger inclination" insofar as each cutting edge with its connecting section encloses a non-zero angle, which is also referred to herein as Bleed angle should be called.
  • Bleed angle should be called.
  • the front end of each cutting edge is therefore not on a connecting the two immediately adjacent rear ends connecting path, but on a smaller radius.
  • the lead angle ranges given in this disclosure apply to both its definition of the motion vector and its definition of the link.
  • the concrete value for the size of the gate angle depends on its definition, but at least for the cutting blade used in practice on high speed slicers for slicing food products, the difference due to the small length of a cutting edge compared to the total length of the peripheral edge of the knife small or negligible.
  • This embodiment is a sickle knife. Extremely good cutting results can also be achieved with a circular blade designed according to the invention, as have been found on different products, including cheese, tests carried out.
  • a non-zero bleed angle may be in a range of about 1 ° to 10 °, and preferably about 3 ° to 6 °.
  • the lead angle may be in a range of about 10 ° to 20 ° lie.
  • a preferred embodiment is characterized in that the lead angle is constant for all cutting surfaces.
  • the cutting surfaces are respectively turned facing in the intended direction of rotation.
  • the cutting surfaces are each at least substantially planar or curved without edges.
  • planar cutting surfaces are also at least slightly e.g. concave or convex curved cutting surfaces possible.
  • Such cutting surfaces can be produced for example by means of a so-called form milling cutter or by means of a grinding tool.
  • a reference e.g. a reference plane or lines of reference having radii of curvature, are defined to uniquely define the inclination of the respective curved cutting surface with respect to the clamping plane or the cutting plane.
  • another parameter of the toothing according to the invention is the orientation of the cutting edges of the cutting teeth.
  • at least some cutting edges or each cutting edge or that the projection of at least some cutting edges or cutting edge in the mounting plane with ariessstangente a, in particular non-zero, gate angle includes, theorientsstangente and the radius, for example in the rear Cutting end point of the respective cutting edge, and / or that at least some cutting edges or each cutting edge with a connecting path includes a, in particular non-zero, lead angle, wherein the connecting path, the two rear ends or the two front ends of a respective cutting edge and the immediately preceding or following Cutting edge connects together.
  • the size of the gate angle of one or each cutting edge is basically arbitrary and can be selected depending on the properties of the food product to be sliced.
  • the lead angle is a few degrees, especially not more than about 10 °, and e.g. in the range between 3 ° to 6 °, but in principle also larger bleed angles are possible.
  • the cutting edges can each be oriented in such a way that a front end of each cutting edge viewed in the intended direction of rotation lies on a different, in particular smaller, radius relative to the axis of rotation of the knife than the rear end of the relevant cutting edge.
  • the course of each cutting edge between its front end and its rear end can be basically arbitrary, i. both a straight course and a basically arbitrarily curved course are possible.
  • the cutting edge of the cutting blade according to the invention consequently not only the cutting edges of the cutting teeth or the cutting surfaces radially outwardly limiting cutting edges are effective, but also the transition edges, each connect two circumferentially immediately consecutive cutting edges of the cutting teeth together. Consequently, the shape or the course of a transition between two directly successive cutting surfaces, the cutting behavior of the cutting blade according to the invention can also be influenced.
  • all cutting edges lie in a common plane, preferably in the clamping plane or in a plane parallel to the clamping plane, and / or that all cutting edges and each two immediately adjacent cutting edges connecting transition edges together form an uninterrupted cutting edge especially in the clamping plane or in a plane parallel to the mounting plane.
  • the cutting edges can also lie in different planes.
  • the cutting edges each intersect the clamping plane or a plane parallel to the clamping plane.
  • a non-interrupted cutting edge formed jointly by all the cutting edges and each two immediately adjacent cutting edges intersects the clamping plane or a plane parallel to the clamping plane, alternately coming from one side and from the other side of this plane, wherein the plane intersecting portions of the cutting edge are either only cutting edges, only transitional edges, or both cutting edges and transition edges.
  • the effective as a cutting edge peripheral edge of the knife may be provided with a so-called clearance angle, which is different from zero, which below in connection with Fig. 5a and 5b is explained in more detail. If the clearance angle is different from zero, the cutting edges and the transition edges are not in a common plane. Preferably, however, a clearance angle of 0 ° is provided, so that in a preferred embodiment all cutting edges and all transition edges lie in a common plane, specifically in the clamping plane or in a plane parallel to the clamping plane.
  • the cutting surfaces each cut radially outward the clamping plane, wherein the cutting lines in each case the cutting edge form and radially inwardly intersect an inclined surface of the cutting blade, which forms an angle with the clamping plane.
  • this angle between the inclined surface and the clamping plane is smaller than the smallest tilt angle of the cutting surfaces, so that an imaginary radial extension of the inclined surface would intersect the clamping plane radially outside the cutting edges of the cutting surfaces.
  • the cutting edges and / or transition edges each connecting two directly successive cutting edges, each straight.
  • at least slightly e.g. concave or convex curved cutting edges and / or transition edges possible.
  • at least approximately a straight line analogous to the above-described movement tangent can also be defined for a curved cutting edge, which allows a clear definition of the orientation of the cutting edge.
  • the cutting surfaces of two directly successive cutting teeth are connected to each other by a transition surface, wherein in particular the transition surface is formed as a recessed relative to the cutting surfaces recess.
  • the depression may be formed as a notch extending in the radial direction, groove, groove or groove.
  • the depression can form an undercut.
  • the radial extent of two directly successive cutting teeth is preferably at least substantially equal to the radial extent of the transition surface between the two cutting surfaces.
  • the cutting surfaces in each case over their entire radial extent in the transition area over.
  • transition edges can each be a relatively sharp, non-rounded edge or a rounded edge with a comparatively small radius of curvature.
  • the transition edge may form a comparatively smooth transition and in particular be rounded off with a comparatively large radius of curvature.
  • a wavy surface can be formed by the cutting surfaces and transition surfaces as a whole. It is also possible to form the two transition edges differently, so that the transition from the one cutting surface into the transition surface is comparatively sharp-edged and the transition between the other cutting surface and the transition surface is relatively smooth.
  • the transition surface may be bounded radially on the outside by a transition edge connecting the two cutting edges of the two cutting teeth. As already mentioned above, this transition edge itself may be formed as a cutting edge.
  • the cross-sectional shape of the transition surface or its profile can in principle be designed as desired.
  • the transition surface may have a basically arbitrary course between the two cutting surfaces.
  • the transition surface has a curved course, i. the cross-sectional shape or the profile of the transition surface is not straight.
  • the transition surface is at least approximately U- or V-shaped curved.
  • the profile of the transition surface is determined in particular by the tool used for the production.
  • Preferred is a cylindrical milling tool or a grinding tool with a longitudinal axis inclined relative to the clamping plane used so that the defined by the recess transition surface radially outside the clamping plane intersects.
  • the interface can then be e.g. represent the shortest path between the two transition edges into the adjacent cutting surfaces.
  • the transition surface can, based on the size of the adjacent cutting surfaces, occupy a relevant part of the circumferential angle range.
  • the transition surface may extend over a circumferential angular range that is about 0.1 to 0.5 times the circumferential angular range of one of the cutting surfaces.
  • the transitions between immediately successive cutting surfaces are formed such that the two immediately consecutive cutting surfaces - viewed in the circumferential direction of the axis of rotation - do not overlap.
  • the cutting edges preferably have a constant circumferential length and / or a constant edge length, i. all cutting edges preferably have the same circumferential length.
  • each cutting tooth has a circumferential length and / or a tooth length of about 3 mm to 7 mm, preferably about 5 mm.
  • circumferential length in each case the circumferentially measured extent or extension of the cutting edges or cutting teeth, i. not the length of the cutting edge or cutting tooth measured along the cutting edge. This length is referred to as edge length in this disclosure.
  • the cutting edges are each not in the geometrically strict sense on a circumferential line of the knife. Consequently, the circumferential length of the cutting edges are each smaller than the pitch, since the pitch is the sum of the circumferential length of the cutting edge and the non-zero circumferential length of the transition edge adjacent the respective cutting edge.
  • the edge length of a cutting edge is the same size as the pitch or greater than the pitch, when the transition edge is relatively small and / or the angle of attack of the cutting surface is relatively large.
  • the pitch of the cutting teeth is preferably constant and is in particular between about 3 mm and 6 mm, preferably about 5 mm.
  • the pitch of the cutting teeth is to be understood as meaning the distance between two circumferentially immediately consecutive cutting teeth, measured between points of the two cutting teeth corresponding to one another. At a pitch of, for example, 5 mm, for example, the distance between the two front ends of the cutting teeth of the two cutting teeth, each in the intended direction of rotation, is 5 mm.
  • the pitch of the cutting teeth may vary in the circumferential direction, in particular with respect to the circumferential lengths of Cutting teeth and / or in terms of the circumferential lengths of the transitions between the cutting teeth.
  • the toothing of the cutting blade is made identical in each circumferential region, i. Not all cutting teeth of the cutting blade are necessarily identical, with such an embodiment is nevertheless encompassed by the invention. Moreover, it is not mandatory according to the invention that the entire effective cutting edge of the cutting blade is provided with a toothing.
  • At least substantially the entire effective cutting edge is provided with a toothing, which, however, is designed differently in individual circumferential regions.
  • the peripheral edge has at least one type I circumferential region with a plurality of cutting teeth whose cutting surfaces have the same tilt angle.
  • the peripheral edge has at least one circumferential region of the type II with a plurality of cutting teeth whose cutting surfaces have a varying tilt angle.
  • the peripheral edge has one or more peripheral regions of the type I and additionally one or more peripheral regions of the type II.
  • the tilt angle may vary in each case from one cutting tooth to an immediately adjacent cutting tooth, or for the tilt angle to be in each case from a group of n> 1 consecutive Cutting teeth with mutually equal tilt angle to an immediately adjacent group of m> 1 successive cutting teeth with mutually equal tilt angle varies.
  • the tilt angle may vary either from tooth to tooth or from tooth group to tooth group.
  • the circumferential edge between two type I circumferential regions comprises a type II circumferential region in which the value of the tilt angle varies from the tilt angle value of the one circumferential region of type I to the tilting angle value of the other circumferential region of type I.
  • the cutting blade when the cutting blade is a sickle blade or a spiral blade, can be provided according to a preferred development that the radius of curvature of the peripheral edge seen in the intended direction of rotation decreases from a maximum radius to a smallest radius, wherein the value of the tilt angle of the peripheral portion of the type II seen in the direction of rotation decreases from a larger Kippwinkelwert to a smaller Kippwinkelwert, in particular in equal angular increments of cutting tooth to cutting tooth.
  • a cutting profile can be obtained by a corresponding tilting position of the individual cutting surfaces along the peripheral edge, which shows both an optimal immersion behavior and an optimal filing behavior.
  • a cutting profile can be reproduced, as it is known for example from the prior art for sickle knife with unworn knife edge and in which - as in connection with DE 10 2007 040 350 A1 mentioned - in a dip area a comparatively flat cutting angle and in a storage area, a comparatively steep cutting angle is present.
  • the tilting angle of the cutting surfaces of the cutting teeth can be made comparatively small in a circumferential region of type I forming the immersion region, whereas in a peripheral region of the type I forming the deposition region, the tilting angle of the cutting surfaces is selected to be relatively large.
  • the transition area between the dip area and the storage area is then formed by the perimeter area of the type II, in which - viewed from the immersion area - the tilt angle of the cutting surfaces increases from the smaller value of the immersion area to the larger value in the deposition area, this increase being continuous from cutting tooth to cutting tooth or cutting tooth group to cutting tooth group, each within a group constant tilt angle can be done, as already stated above in general.
  • the storage area extends approximately over a twice as wide circumferential angle range as the immersion area, the transition area between the immersion area and the storage area extending over a circumferential angle range, which is slightly more than is half of the circumferential angular range of the immersion area.
  • the larger tilting angle value of one circumferential region of type I may be in the range of 20 ° to 30 ° and preferably between 22 ° and 26 °, the smaller tilting angle value of the other peripheral region of type I being in the range of 15 ° ° to 22 ° and is preferably between 17 ° and 19 °, and wherein in the peripheral region of the type II each angular change in the range of 0.2 ° to 1 °, preferably in the range of 0.25 ° to 0.5 °.
  • the smaller tilt angle value is about 18 °, with either the larger tilt angle value being about 26 ° and each angle change about 0.5 °, or the larger tilt angle value being about 22 ° and each angle change being about 0.25 °.
  • the inclination or the tilt angle of the cutting surfaces can either be constant over the entire peripheral edge or vary along the peripheral edge.
  • a plurality of peripheral regions may be provided, of which at least two circumferential regions differ with regard to the value of the tilt angle constant within the respective circumferential region or with respect to the change behavior of the tilt angle within the respective circumferential region or in that the tilt angle is constant in the one peripheral region and the other peripheral region of the tilt angle varies.
  • the "gradient” may e.g. 0.25 ° or 0.5 ° per cutting tooth, i. the tilt angle can change from cutting tooth to cutting tooth in equally large angular steps.
  • a variation of the tilt angle over the peripheral edge of the circular blade is symmetrical, as in a circular blade - unlike a sickle blade - due to the superposition of self-rotation about the axis of rotation and the orbital motion about the axis parallel to the axis of rotation extending axis - is not predetermined in practice , with which peripheral area the circular blade strikes a product to be sliced.
  • the "360 °" wave-shaped variation of the tilt angle referred to as the total circumference of 360 ° may be an integer multiple of one period of the "tilt angle oscillation".
  • a particular advantage of the cutting blade according to the invention is that the improved cutting quality at the same time allows an increase in the cutting speed.
  • the individual machining of the cutting teeth according to the invention and in particular the individual design of the cutting surfaces makes it possible to realize a variety of configurations of a knife toothing.
  • the cutting blades can thereby be adapted specifically to certain product properties.
  • An adaptation can also be made with regard to the cutting geometry.
  • it is possible to take into account the way in which the knife penetrates into the respective product taking into account the position of the product in the slicing device, in particular in a so-called Cutting shaft, and taking into account the size of the total intended cutting area, in particular the cutting shaft width.
  • Such adaptation options are particularly important in the so-called multi-lane slicing, so when simultaneously cutting several adjacent products of importance.
  • a multi-track slicing the products of the cutting plane defined by the knife edge are fed simultaneously at least substantially at right angles to the cutting plane.
  • a cutting blade according to the invention for a high-speed slicer for slicing food products is a sickle blade that rotates red during a cutting operation about an axis of rotation 11 in a direction of rotation.
  • the radially outer, effective as a cutting peripheral edge 13 of the cutting blade 10 extends approximately over a circumferential angular range of almost 270 °, from a minimum radius Rmin to a maximum radius Rmax.
  • the rotary blade 10 dives with an immersion region 33, which for example extends over a circumferential angular range of 74 ° and has a circumferential length of about 317 mm, into the product to be sliced.
  • the immersion region 33 is adjoined by a transitional region 32 which, for example, extends over a circumferential angle range of 41 ° and has a circumferential length of approximately 205 mm.
  • a storage area 31 of the knife edge which extends over a circumferential angular range of about 150 ° and has a circumferential length of about 917 mm.
  • the knife edge which has these three regions 31, 32 and 33 is provided with a toothing according to the invention, which will be discussed in more detail below.
  • Each cutting tooth of the toothing has, among other things, a cutting face 17 pointing towards the front side of the knife 10 (cf. Fig. 2 ), which has a certain inclination.
  • the three regions 31, 32, 33 differ from each other in terms of the inclination of the cutting surfaces 17. This will be explained in more detail below.
  • the Fig. 1 is a plan view of the front of the blade 10, which faces away during the cutting operation the product to be sliced or the products to be cut at the same time.
  • the axis of rotation 11 extends centrally through a circular receiving opening 12 of the knife 10, by means of which the knife 10 on a knife holder of the slicing device, not shown here can be attached.
  • the knife holder comprises, for example, a rotor hub of a high-speed slicer, as is generally known to the person skilled in the art.
  • Adjoining the receiving opening 12 is an end face 38 which, in this exemplary embodiment, has a planar design and runs perpendicular to the axis of rotation 11.
  • the tilt angle of the inclined surface 37 ie the angle between the inclined surface 37 and a clamping plane AE (see. Fig. 3 ), is smaller than the smallest provided at the cutting surfaces 17 tilt angle.
  • the inclined surface 37 extends flatter than each cutting surface 17, so that an imaginary radial extension of the inclined surface 37, the clamping plane AE radially outside the peripheral edge 13 (FIGS. Fig. 1 ) would cut.
  • Fig. 2 is an enlarged section of Fig. 1 in the immersion region 33, which, starting from the smallest radius Rmin of the knife 10, shows the first nine cutting teeth 15 of the toothing above.
  • the cutting surfaces 17 are radially outwardly bounded by a cutting edge 19.
  • Transitions 27 formed as depressions between the cutting teeth 15 are also radially outward from a cutting edge 21 (FIG. Fig. 3 ), each connecting two cutting edges 19 of the cutting surfaces 17.
  • the transition from the inclined surface 37 into the cutting surfaces 17 of the cutting teeth 15 is in each case formed by a straight inner edge 36, from whose end points in each case an edge extends to the corresponding end point of the relevant cutting edge 19.
  • These edges 25 ( Fig. 4 ) thus extend respectively between the inclined surface 37 and the clamping plane AE.
  • the inner edges 36 may each be sharp-edged or rounded.
  • a transition edge 39 is formed between the flat end face 38 and the inclined surface 37.
  • the edge 39 may be sharp-edged or rounded.
  • Fig. 3 shows the middle upper view with the section BB an enlarged section of the toothing of the blade 10 of Fig. 1 in the storage area 31.
  • the illustration below shows an enlargement of the toothing in the transition region 32
  • the underlying representation with the section CC shows an enlargement of the toothing in the immersion region 33.
  • the intended direction of rotation red of the blade 10 is indicated by an arrow.
  • the cutting surfaces 17 are thus not only tilted, ie in each case connect the inner edge 36 located above the clamping plane AE in the inclined surface 37 with the clamping plane AE, but are also employed turning red in the direction of rotation.
  • the tilt angle KW in the storage area 31 (upper middle illustration in Fig. 3 ) is comparatively large.
  • the tilt angle KW is preferably 26 ° here.
  • the tilt angle KW is smaller than in the storage area 31.
  • the tilt angle KW is here preferably 18 °.
  • the cutting surfaces 17 are consequently flatter or less steep than in the depositing region 31.
  • compressions of the product during immersion of the knife 10 can be avoided, whereas at the end of the cutting process due to the steeper cutting surfaces 17 in the depositing region 31 improved storage of each separated product slice can be achieved.
  • the cutting surfaces 17 are tilted such that in each case three successive cutting surfaces 17 have the same tilt angle KW.
  • the tilt angle KW starting from the value 26 ° in the transitional region 32, decreases in each case from three groups to immediately following groups of three by 0.5 °, the last group of three before the immersion region 33 having a tilt angle KW of 18.5 °, to which then connect the cutting teeth 15 of the immersion region 33 each with a tilt angle KW of the cutting surface 17 of 18 °.
  • the tilt angle value in the immersion region 33 may again be 18 °, whereas in the deposition region 31 the tilt angle value is 22 ° and each angular step between immediately consecutive triplets of cutting teeth 15 in the transition region 32 has a value of 0.25 °.
  • the pitch a of the toothing is constant over the entire circumferential area and in this embodiment is 5 mm.
  • the pitch of the teeth may vary, as already stated in the introductory part.
  • a transition 27 is present in each case between two directly successive cutting surfaces 17, which is formed as a recess extending in the radial direction with a U-shaped cross-section.
  • Every transition 27 (cf. Fig. 4 ) comprises a transition surface 23, which merges radially inwardly via a transition edge 35 in the inclined surface 37 and is bounded radially outwardly by a transition edge 21 which lies in the cutting plane SE.
  • a special feature of this embodiment consists in the fact that these transition edges 21 connect the cutting edges 19 of the adjacent cutting surfaces 17 and are themselves formed as a cutting edge. As a result, all the cutting edges 19 and each transitional edge 21 connecting each two immediately consecutive cutting edges 19 together form a continuous, uninterrupted overall cutting edge.
  • the dash-dotted line runs through the lowest point of the transition surface 23.
  • the points 1 and 2 are the intersections of the dotted line with the cutting plane SE (point 1) and with the inclined surface 37 (point 2).
  • the points 3 and 4 are the intersections of a first transition edge 25 with the cutting plane SE (point 4) and with the inclined surface 37 (point 3), whereas the points 5 and 6, the intersections of a second transition edge 25 with the cutting plane SE (point 5 ) or the inclined surface 37 (point 6).
  • the two transition edges 25, the cutting edge 19 and the inner edge 36 clamp the respective cutting surface 17, which is formed planar in this example, so has no curvature, however curved.
  • the point 2 is in turn radially inward than the point 3 and therefore higher than the point 3 and higher than the point 6th
  • the point 1 is located radially further inward than the point 4, which in turn lies radially further inward than the point 5.
  • all three points 1, 4 and 5 are at the same height level, since they lie in the common cutting plane SE.
  • the concrete lengths and relative positions of the points 3, 4, 5 and 6 connecting edges 19, 25, 36 of the respective cutting surface 17 are selected in this embodiment such that the cutting surface 17 is not only tilted, but also employed, and although such that the cutting surface 17 is red in the direction of rotation.
  • the cutting surfaces 17 are each made such that the cutting surfaces 17 have in the intended direction of rotation red.
  • the four corner points 19a, 19b, 36a and 36b lie in a common plane, namely in the plane of the planar cutting surface 17.
  • a planar cutting surface 17 is not mandatory.
  • the cutting surface 17 may also be concave or curved. It can also be provided that the named vertices do not all lie in a common plane. The cutting surface 17 is then curved accordingly.
  • Fig. 4 purely by way of example shows the possibilities of unambiguously defining the orientation of the cutting surface 17 in a knife-fixed reference system.
  • the rear end 19b of the cutting edge 19 forms the reference point when viewed in the direction of rotation red.
  • the movement tangent T 'at the rear end 19b is perpendicular to the radius R through the rear end 19b and is identical to the motion vector the rear end 19b.
  • the cutting edge 19 is inclined by an angle ⁇ in such a way that the cutting edge 19 is red in the direction of rotation.
  • the angle between a cutting edge 19 and, for example, that (in Fig. 4 dash-dotted) connecting path V are defined, which connects the rear end 19b of the respective cutting edge 19 and the rear end 19b of the red in the intended direction of rotation red immediately adjacent cutting edge 19 with each other.
  • all these links V together form a traverse which approximates an imaginary continuous curve, which is not a circle, on which all rear ends 19b of the cutting edges 19 lie and which at least approximately corresponds to the cutting edge of a conventional toothless sickle blade.
  • the front end 19a of each cutting edge in this embodiment does not lie on the relevant link V, but on a smaller radius, i. closer to the axis of rotation of the knife than any point on the connecting path V.
  • the cutting edge can also lie on the connecting line V.
  • the cutting surfaces 17 each consist of a plurality of individual surfaces, each of which is planar and / or, for example, convex or concave curved.
  • the cutting surfaces 17 may have edged or rounded transitions between the individual surfaces.
  • the cutting surfaces 17 are, if they are curved, respectively a part of a mathematically regular or differentiable surface and therefore have no edges.
  • Fig. 5a shows the example of conventional knife the definition of the so-called clearance angle FW in each case in a section perpendicular to the defined by the cutting edge SK cutting plane SE and parallel to the axis of rotation, not shown.
  • FW 0 °
  • ie on the knife rear side RS there is an area FL adjacent to the cutting edge SK in the cutting plane SE.
  • the right representation shows a knife with a non-zero clearance angle FW.
  • Fig. 5b it turns out that in a knife according to the invention and a non-zero clearance angle FW the cutting edges 19 and transition edges 21 (and thus the points 1, 4 and 5 according to FIG Fig. 3 ) are no longer in a common plane.
  • the right-hand illustration shows the two sections aa and bb according to the left-hand illustration.
EP17205908.1A 2016-12-16 2017-12-07 Couteau Active EP3338972B1 (fr)

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DE102017108841.5A DE102017108841A1 (de) 2016-12-16 2017-04-25 Schneidmesser und verfahren zu dessen herstellung

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019201519A1 (de) 2019-02-06 2020-08-06 Hagedorn Spiralmesser GmbH Verzahntes Schneidmesser
EP3459699B1 (fr) 2016-12-16 2020-09-16 Weber Maschinenbau GmbH Breidenbach Couteau
CN113179750A (zh) * 2021-05-27 2021-07-30 新疆农业大学 铲切组合式红花采摘机械手及其控制方法

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DE3049075A1 (de) * 1980-12-24 1982-07-22 Johannes Remmert Spezialschleiferei für die Brot-Industrie, 4796 Salzkotten Maschinenmesser, insbesondere kreis- oder bogenfoermiger gestalt
DE3049147A1 (de) * 1980-12-24 1982-07-29 Johannes Remmert Spezialschleiferei für die Brot-Industrie, 4796 Salzkotten Maschinenmesser, insbesondere kreis- oder bogenfoermiger gestalt
DE10004836C1 (de) * 2000-02-01 2001-10-31 Mws Schneidwerkzeuge Gmbh & Co Rundmesser für Allesschneider und Vorrichtung zur Herstellung der Schneidezahnung
WO2014114579A2 (fr) * 2013-01-25 2014-07-31 Gea Food Solutions Germany Gmbh Lame coupante à angle de coupe variable

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US4660453A (en) 1985-05-28 1987-04-28 Urschel Laboratories, Inc. Circular knife and method of making same
US20060021487A1 (en) 2004-07-30 2006-02-02 William Dickover Serrated blade for slicing machine
DE102007040350A1 (de) 2007-08-27 2009-03-05 Weber Maschinenbau Gmbh Breidenbach Schneidmesser
FR2988312B1 (fr) 2012-03-23 2014-11-28 Adiamas Lame de coupe, procede de realisation d'une telle lame de coupe, installation de mise en oeuvre d'un tel procede
DE102017108841A1 (de) 2016-12-16 2018-06-21 Weber Maschinenbau Gmbh Breidenbach Schneidmesser und verfahren zu dessen herstellung
EP3459699B1 (fr) 2016-12-16 2020-09-16 Weber Maschinenbau GmbH Breidenbach Couteau

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Publication number Priority date Publication date Assignee Title
DE3049075A1 (de) * 1980-12-24 1982-07-22 Johannes Remmert Spezialschleiferei für die Brot-Industrie, 4796 Salzkotten Maschinenmesser, insbesondere kreis- oder bogenfoermiger gestalt
DE3049147A1 (de) * 1980-12-24 1982-07-29 Johannes Remmert Spezialschleiferei für die Brot-Industrie, 4796 Salzkotten Maschinenmesser, insbesondere kreis- oder bogenfoermiger gestalt
DE10004836C1 (de) * 2000-02-01 2001-10-31 Mws Schneidwerkzeuge Gmbh & Co Rundmesser für Allesschneider und Vorrichtung zur Herstellung der Schneidezahnung
WO2014114579A2 (fr) * 2013-01-25 2014-07-31 Gea Food Solutions Germany Gmbh Lame coupante à angle de coupe variable

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3459699B1 (fr) 2016-12-16 2020-09-16 Weber Maschinenbau GmbH Breidenbach Couteau
DE102019201519A1 (de) 2019-02-06 2020-08-06 Hagedorn Spiralmesser GmbH Verzahntes Schneidmesser
EP3693141A1 (fr) 2019-02-06 2020-08-12 Hagedorn Spiralmesser GmbH Lame de coupe dentée
CN113179750A (zh) * 2021-05-27 2021-07-30 新疆农业大学 铲切组合式红花采摘机械手及其控制方法
CN113179750B (zh) * 2021-05-27 2022-03-29 新疆农业大学 铲切组合式红花采摘机械手及其控制方法

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EP3459699B1 (fr) 2020-09-16
EP3459699A1 (fr) 2019-03-27

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