WO1994022645A1 - Cutting device with piezoelectric oscillator - Google Patents

Cutting device with piezoelectric oscillator Download PDF

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Publication number
WO1994022645A1
WO1994022645A1 PCT/DE1994/000259 DE9400259W WO9422645A1 WO 1994022645 A1 WO1994022645 A1 WO 1994022645A1 DE 9400259 W DE9400259 W DE 9400259W WO 9422645 A1 WO9422645 A1 WO 9422645A1
Authority
WO
WIPO (PCT)
Prior art keywords
knife
cutting device
cutting
oscillator
piezoelectric oscillator
Prior art date
Application number
PCT/DE1994/000259
Other languages
German (de)
French (fr)
Inventor
Klaus Höfer
Helge G. Steckmann
Original Assignee
Rowenta-Werke 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 Rowenta-Werke Gmbh filed Critical Rowenta-Werke Gmbh
Publication of WO1994022645A1 publication Critical patent/WO1994022645A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B7/00—Hand knives with reciprocating motor-driven blades
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • 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

Definitions

  • the invention relates to a cutting device for an electrical household appliance, in particular an electrically operated hand knife or an electric cutting machine for food, such as. B. Bread, meat, cheese or the like
  • Slicers are equipped with a circular knife, which is driven by a motor arranged in the housing.
  • the speed of the knife can be regulated according to the food to be cut (DE-AS 23 38 523).
  • Electrically driven knives with blades that oscillate in the axial direction are also known.
  • the inventive arrangement of a piezo oscillator which preferably works in the ultrasound range, causes the knife to vibrate perpendicular to the plane of the cut, whereby the friction between the material to be cut and the knife flanks is almost eliminated.
  • the coupling of the piezo oscillator and the geometric shape of the knife are designed so that the vibrations are distributed evenly over the knife flanks involved in the cutting process.
  • the knife is only slightly warmed when slicing and even wafer-thin meat and cheese cuts can be sliced without the slice thickness becoming uneven or the slices fraying.
  • one end of the knife is advantageously angled almost at right angles.
  • the bending radius and the knife material are adapted to the frequency of the piezo oscillator, which causes the knife to vibrate optimally in its cutting area.
  • the knife can also advantageously be set into a rotary or oscillating cutting movement by means of a known drive.
  • An embodiment of the invention is shown in the drawings and is described in more detail below. Show it :
  • Figure 1 The cutting device according to the invention in side view
  • FIG. 2 shows a top view according to FIG. 1 ;
  • Figure 3 shows another embodiment in side view
  • FIG. 4 shows a top view according to FIG. 3.
  • the cutting device shown in FIGS. 1 and 2 consists of a knife 2 with a piezo oscillator 1 attached to it.
  • the knife 2 has the shape of a circular segment and the piezo oscillator 1 is fastened in the center of the circle of the knife 2 by means of a screw connection 5.
  • the coupling is designed so that the knife 2 swings perpendicular to the plane of the cut and the vibrations are evenly distributed over the knife flanks 3, 4 involved in the cutting process.
  • FIGS. 3 and 4 show a further embodiment, the knife 2 having the shape of a conventional knife.
  • the knife 2 is angled at almost one right angle and the piezo oscillator 1 is arranged on the angled section 6 of the knife 2, the bending radius R and the knife material being adapted to the frequency of the piezo oscillator 1.

Abstract

A cutting device for an electrical household appliance, in particular an electric food slicer such as for bread, meat, cheese or the like, is characterized in that a piezoelectric oscillator (1) is operatively linked with a knife (2) and in that the knife (2) is excited by the piezoelectric oscillator (1) to produce oscillations perpendicular to the cutting plane.

Description

SCHNEIDVORRICHTUNG MIT PIEZOSCHWINGER CUTTING DEVICE WITH PIEZO SWINGARM
Beschreibung :Description :
Die Erfindung betrifft eine Schneidvorrichtung für ein elektrisches Haushaltsgerät, insbesondere ein elektrisch betriebenes Handmesser oder eine elektrische Schneidmaschine für Lebensmittel, wie z . B . Brot, Fleisch, Käse oder dgl .The invention relates to a cutting device for an electrical household appliance, in particular an electrically operated hand knife or an electric cutting machine for food, such as. B. Bread, meat, cheese or the like
Derartige Schneidmaschinen, sog . Allesschneider, sind mit einem Rundmesser ausgerüstet, das von einem im Gehäuse angeordneten Motor angetrieben wird . Entsprechend der zu schneidenden Lebensmittel ist die Drehzahl des Messers regelbar ( DE-AS 23 38 523) . Bekannt sind auch elektrisch angetriebene Messer mit in Axialrichtung oszillierenden Klingen .Such cutting machines, so-called. Slicers are equipped with a circular knife, which is driven by a motor arranged in the housing. The speed of the knife can be regulated according to the food to be cut (DE-AS 23 38 523). Electrically driven knives with blades that oscillate in the axial direction are also known.
Diese bekannten Haushaltsgeräte haben den Nachteil , daß beim Schneiden von Brot, Käse, Fleisch u . a. haushaltsüblichen Schnittgütern die abgeschnittenen Scheiben zerrissen sind, an einer Seite ausgefranst oder insgesamt starke Unterschiede in der Schnittstärke aufweisen . Insbesondere nachteilig ist dies bei Fleisch- oder Käseaufschnitten, die hauchdünn geschnitten werden müssen . Dadurch wird der Verzehrgenuß stark beeinträchtigt und die Garnierung dieser unansehnlichen Scheiben unmöglich gemacht.These known household appliances have the disadvantage that when cutting bread, cheese, meat and. a. household cut wastes that are torn off, frayed on one side, or have large differences in cutting thickness. This is particularly disadvantageous in the case of meat or cheese cuts, which have to be cut wafer-thin. This greatly affects the enjoyment of consumption and makes the garnishing of these unsightly slices impossible.
Ursache für die o. a . Nachteile ist hauptsächlich die ungenügende Schärfe der Messerschneide und die außerordentlich hohe Reibung zwischen den Messerflanken und dem Schnittgut, wodurch eine Verformung der Messergeometrie bzw . der Messerführung erfolgt, was nur durch eine entsprechend aufwendige Konstruktion verhindert werden kann . Auf dem gewerblichen Sektor, z . B . zum Schneiden außergewöhnlich zäher Werkstoffe, z . B . Gummi ist es bekannt, das Messer in Ultraschallschwingungen zu versetzen, wobei das Messer senkrecht zur Ebene der Schnittführung schwingt. Diese bekannten gewerblichen Schneidvorrichtungen sind aber für Haushaltsgeräte viel zu aufwendig und daher nicht verwendbar.Cause of the above Disadvantages are mainly the insufficient sharpness of the knife edge and the extraordinarily high friction between the knife flanks and the clippings, which causes a deformation of the knife geometry or. the knife is guided, which can only be prevented by a correspondingly complex construction. In the commercial sector, e.g. B. for cutting exceptionally tough materials, e.g. B. Rubber, it is known to set the knife in ultrasonic vibrations, the knife vibrating perpendicular to the plane of the cut. However, these known commercial cutting devices are far too expensive for household appliances and therefore cannot be used.
Ausgehend von dem vorbekannten Stand der Technik ist es die Aufgabe dieser Erfindung, eine Schneidvorrichtung für ein elektrisches Haushaltsgeräte, insbesondere eine elektrische Schneidmaschine für Lebensmittel, zu schaffen, die die Nachteile der bekannten Schneidvorrichtungen nicht aufweist und bei der die Reibung zwischen den Messerflanken und dem Schnittgut so gering ist, daß eine Verformung der Schneidgeometrie bzw . der Messerführung vermieden wird.Starting from the known prior art, it is the object of this invention to provide a cutting device for an electrical household appliance, in particular an electric cutting machine for food, which does not have the disadvantages of the known cutting devices and in which the friction between the knife flanks and the clippings is so small that a deformation of the cutting geometry or. the knife guide is avoided.
Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1 .This object is achieved by the characterizing features of claim 1.
Durch die erfindungsgemäße Anordnung eines Piezoschwingers, der vorzugsweise im Ultraschallbereich arbeitet, wird das Messer senkrecht zur Ebene der Schnittführung in Schwingungen versetzt, wodurch die Reibung zwischen dem Schnittgut und den Messerflanken nahezu aufgehoben wird . Die Ankopplung des Piezoschwingers sowie die geometrische Form des Messers sind so ausgelegt, daß die Schwingungen gleichmäßig über die am Schneidprozeß beteiligten Messerflanken verteilt werden . Das Messer wird beim Schneiden nur geringfügig erwärmt und selbst hauchdünne Fleisch und Käseaufschnitte können geschnitten werden, ohne daß die Scheibenstärke ungleich wird oder die Scheiben ausfransen . Bei Anwendung der erfindungsgemäßen Schneidvorrichtung bei einem elektrisch betriebenen Handmesser ist vorteilhaft ein Ende des Messers nahezu rechtwinklig abgewinkelt. Der Biegeradius und der Messerwerkstoff sind an die Frequenz des Piezoschwingers angepaßt, wodurch das Messer in seinem Schneidbereich in optimale Schwingungen versetzt wird . Vorteilhaft kann das Messer zusätzlich über einen bekannten Antrieb in eine rotatorische oder oszillierende Schneidbewegung versetzt werden . Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird nachfolgend näher beschrieben . Es zeigen :The inventive arrangement of a piezo oscillator, which preferably works in the ultrasound range, causes the knife to vibrate perpendicular to the plane of the cut, whereby the friction between the material to be cut and the knife flanks is almost eliminated. The coupling of the piezo oscillator and the geometric shape of the knife are designed so that the vibrations are distributed evenly over the knife flanks involved in the cutting process. The knife is only slightly warmed when slicing and even wafer-thin meat and cheese cuts can be sliced without the slice thickness becoming uneven or the slices fraying. When using the cutting device according to the invention in an electrically operated hand knife, one end of the knife is advantageously angled almost at right angles. The bending radius and the knife material are adapted to the frequency of the piezo oscillator, which causes the knife to vibrate optimally in its cutting area. The knife can also advantageously be set into a rotary or oscillating cutting movement by means of a known drive. An embodiment of the invention is shown in the drawings and is described in more detail below. Show it :
Figur 1 Die erfindungsgemäße Schneidvorrichtung in Seitenansicht;Figure 1 The cutting device according to the invention in side view;
Figur 2 eine Draufsicht gemäß Fig . 1 ;FIG. 2 shows a top view according to FIG. 1 ;
Figur 3 eine weitere Ausführungsform in Seitenansicht;Figure 3 shows another embodiment in side view;
Figur 4 eine Draufsicht gemäß Fig. 3.FIG. 4 shows a top view according to FIG. 3.
Die in den Figuren 1 und 2 dargestellte Schneidvorrichtung besteht aus einem Messer 2 mit daran befestigtem Piezoschwinger 1 . Das Messer 2 hat die Form eines Kreissegments und der Piezoschwinger 1 ist im Kreismittelpunkt des Messers 2 mittels einer Schraubverbindung 5 befestigt. Die Ankopplung ist so ausgelegt, daß das Messer 2 senkrecht zur Ebene der Schnittführung schwingt und die Schwingungen gleichmäßig über die am Schneidprozeß beteiligten Messerflanken 3,4 verteilt sind. Die Figuren 3 und 4 zeigen eine weitere Ausführungsform, wobei das Messer 2 die Form eines herkömmlichen Messers aufweist. Das Messer 2 ist an seinem einen Ende nahezu rechtwinklig abgewinkelt und der Piezoschwinger 1 ist an dem abgewinkelten Abschnitt 6 des Messers 2 angeordnet, wobei der Biegeradius R und der Messerwerkstoff an die Frequenz des Piezoschwingers 1 angepaßt ist. The cutting device shown in FIGS. 1 and 2 consists of a knife 2 with a piezo oscillator 1 attached to it. The knife 2 has the shape of a circular segment and the piezo oscillator 1 is fastened in the center of the circle of the knife 2 by means of a screw connection 5. The coupling is designed so that the knife 2 swings perpendicular to the plane of the cut and the vibrations are evenly distributed over the knife flanks 3, 4 involved in the cutting process. FIGS. 3 and 4 show a further embodiment, the knife 2 having the shape of a conventional knife. The knife 2 is angled at almost one right angle and the piezo oscillator 1 is arranged on the angled section 6 of the knife 2, the bending radius R and the knife material being adapted to the frequency of the piezo oscillator 1.

Claims

Ansprüche: Expectations:
1 . Schneidvorrichtung für ein elektrisches Haushaltsgerät, insbesondere eine elektrische Schneidmaschine für Lebensmittel, wie z . B . Brot, Fleisch, Käse oder dgl . , dadurch gekennzeichnet, daß ein Piezoschwinger ( 1 ) mit einem Messer ( 2 ) in Wirkverbindung steht und dadurch das Messer (2) durch den Piezoschwinger ( 1 ) zu Schwingungen senkrecht zur Ebene der Schnittführung angeregt wird.1 . Cutting device for an electrical household appliance, in particular an electrical cutting machine for food, such as. B. Bread, meat, cheese or the like , characterized in that a piezo oscillator (1) is operatively connected to a knife (2) and thereby the knife (2) is excited by the piezo oscillator (1) to vibrate perpendicular to the plane of the cut.
2. Schneidvorrichtung für ein elektrisches Haushaltsgerät nach Anspruch 1 , dadurch gekennzeichnet, daß die Ankopplung des Piezoschwingers ( 1 ) an das Messer (2) sowie die geometrische Form des Messers ( 2 ) so ausgelegt ist, daß die vom Piezoschwinger ( 1 ) ausgehenden Schwingungen gleichmäßig über die am Schneidprozeß beteiligten Messerflanken (3,4) verteilt sind.2. Cutting device for an electrical household appliance according to claim 1, characterized in that the coupling of the piezoelectric oscillator (1) to the knife (2) and the geometric shape of the knife (2) is designed so that the vibrations emanating from the piezoelectric oscillator (1) are evenly distributed over the knife flanks (3, 4) involved in the cutting process.
3. Schneidvorrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß der Piezoschwinger ( 1 ) im Ultraschallbereich von ca. 30 KHz arbeitet.3. Cutting device according to claims 1 and 2, characterized in that the piezo oscillator (1) operates in the ultrasonic range of approximately 30 kHz.
4. Schneidvorrichtung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß das Messer ( 2 ) an einem Ende nahezu rechtwinklig abgewinkelt ist, wobei der Biegeradius ( R ) und der Messerwerkstoff an die Frequenz des Piezoschwingers ( 1 ) angepaßt ist.4. Cutting device according to claims 1 to 3, characterized in that the knife (2) is angled almost at right angles at one end, the bending radius (R) and the knife material being adapted to the frequency of the piezo oscillator (1).
5. Schneidvorrichtung nach einem oder mehreren Ansprüchen, dadurch gekennzeichnet, daß das Messer (2 ) zusätzlich eine rotatorische oder oszillierende Schneidbewegung ausführt. 5. Cutting device according to one or more claims, characterized in that the knife (2) additionally carries out a rotary or oscillating cutting movement.
PCT/DE1994/000259 1993-04-02 1994-03-04 Cutting device with piezoelectric oscillator WO1994022645A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934310832 DE4310832C2 (en) 1993-04-02 1993-04-02 Cutting device
DEP4310832.6 1993-04-02

Publications (1)

Publication Number Publication Date
WO1994022645A1 true WO1994022645A1 (en) 1994-10-13

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WO (1) WO1994022645A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1935592A1 (en) 2006-12-19 2008-06-25 Dr. Wolf & Partner GmbH Ingenieurbüro für Lebensmitteltechnik Device for cutting food with ultrasound and ultrasonically activated cutting tools

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19506333C2 (en) * 1995-03-14 2001-09-13 Joerg Arnold Vibration and impact-supported knife
DE19537826C1 (en) * 1995-10-11 1997-02-27 Wolf Und Partner Ingenieurbuer Cutting system excited by ultrasound, especially for cutting food
DE29719746U1 (en) * 1997-11-07 1999-03-18 Kln Ultraschall Gmbh Sonotrode for ultrasonic processing machines with holder for exchangeable mounting of processing tools
DE10337272A1 (en) * 2003-08-13 2005-03-10 Alpma Alpenland Masch Slicing device for food with tendency of sticking to blade, working with creation of ultrasonic waves
DE102011101524A1 (en) * 2011-05-13 2012-11-15 Westfälische Hochschule Gelsenkirchen Bocholt Recklinghausen Scalpel for surgery operation, has actuator, scalpel blade excited to oscillating movement by actuator and drive forming mass together with transition area, where blade, drive and area are connected with one another by spring elements
DE102011118208A1 (en) * 2011-11-11 2013-05-16 Artech Ultrasonic Systems Ag Ultrasonic cutter
US20140345148A1 (en) * 2013-05-21 2014-11-27 Black & Decker Inc. Cutting Blade For Use With Oscillating Power Tool
DE102017112178A1 (en) 2017-06-02 2018-12-06 Tvi Entwicklung Und Produktion Gmbh Cutting device and cutting method

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DE1053151B (en) * 1954-02-27 1959-03-19 Paul E Kempkes Device for cutting soft, fibrous material, especially food, paper and the like. like
US2990616A (en) * 1955-03-08 1961-07-04 Cavitron Corp Ultrasonic cutting tool
GB941463A (en) * 1960-08-17 1963-11-13 Landers Frary & Clark Improvements in knives
US3664021A (en) * 1969-10-30 1972-05-23 Vernon D Beeler Knife
US3793723A (en) * 1971-12-03 1974-02-26 Ultrasonic Systems Ultrasonic replaceable shaving head and razor
DE2625636A1 (en) * 1976-06-08 1977-12-22 Fraas Alfred Holz Ing Grad Cutting solid materials without material removal - by ultrasonic vibration of cutting element
GB2219245A (en) * 1988-06-03 1989-12-06 Rawson Francis F H Ultrasonic cutting
DE3902109A1 (en) * 1989-01-25 1990-07-26 Franz Jakoubek Cutting instrument, especially a scalpel
EP0481312A2 (en) * 1990-10-19 1992-04-22 Societe Des Produits Nestle S.A. Cutting device
EP0540496A1 (en) * 1991-10-30 1993-05-05 GFM Gesellschaft für Fertigungstechnik und Maschinenbau Aktiengesellschaft Method and apparatus for cutting out three-dimensional parts from a block made from large-pore material
EP0584670A1 (en) * 1992-08-28 1994-03-02 Societe Des Produits Nestle S.A. Ultrasonic cutting device

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US4596171A (en) * 1983-10-19 1986-06-24 Gerber Garment Technology, Inc. Method and apparatus for ultrasonically cutting sheet material
DE3529686A1 (en) * 1985-08-20 1987-02-26 Fein C & E Cutting device for cutting elastic materials

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1053151B (en) * 1954-02-27 1959-03-19 Paul E Kempkes Device for cutting soft, fibrous material, especially food, paper and the like. like
US2990616A (en) * 1955-03-08 1961-07-04 Cavitron Corp Ultrasonic cutting tool
GB941463A (en) * 1960-08-17 1963-11-13 Landers Frary & Clark Improvements in knives
US3664021A (en) * 1969-10-30 1972-05-23 Vernon D Beeler Knife
US3793723A (en) * 1971-12-03 1974-02-26 Ultrasonic Systems Ultrasonic replaceable shaving head and razor
DE2625636A1 (en) * 1976-06-08 1977-12-22 Fraas Alfred Holz Ing Grad Cutting solid materials without material removal - by ultrasonic vibration of cutting element
GB2219245A (en) * 1988-06-03 1989-12-06 Rawson Francis F H Ultrasonic cutting
DE3902109A1 (en) * 1989-01-25 1990-07-26 Franz Jakoubek Cutting instrument, especially a scalpel
EP0481312A2 (en) * 1990-10-19 1992-04-22 Societe Des Produits Nestle S.A. Cutting device
EP0540496A1 (en) * 1991-10-30 1993-05-05 GFM Gesellschaft für Fertigungstechnik und Maschinenbau Aktiengesellschaft Method and apparatus for cutting out three-dimensional parts from a block made from large-pore material
EP0584670A1 (en) * 1992-08-28 1994-03-02 Societe Des Produits Nestle S.A. Ultrasonic cutting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1935592A1 (en) 2006-12-19 2008-06-25 Dr. Wolf & Partner GmbH Ingenieurbüro für Lebensmitteltechnik Device for cutting food with ultrasound and ultrasonically activated cutting tools
DE102006059940A1 (en) 2006-12-19 2008-07-10 Dr. Wolf & Partner Ingenieurbüro Für Lebensmitteltechnik Gmbh Device for cutting foods with ultrasound and ultrasonically excited cutting tools

Also Published As

Publication number Publication date
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DE4310832A1 (en) 1994-10-06

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