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WO2009006664A1 - Bloc de résonance pour un appareil de rasage électrique et son procédé de fabrication - Google Patents

Bloc de résonance pour un appareil de rasage électrique et son procédé de fabrication Download PDF

Info

Publication number
WO2009006664A1
WO2009006664A1 PCT/AT2008/000253 AT2008000253W WO2009006664A1 WO 2009006664 A1 WO2009006664 A1 WO 2009006664A1 AT 2008000253 W AT2008000253 W AT 2008000253W WO 2009006664 A1 WO2009006664 A1 WO 2009006664A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade block
blade
blades
ceramic
block according
Prior art date
Application number
PCT/AT2008/000253
Other languages
German (de)
English (en)
Inventor
Kurt Maurer
Original Assignee
Payer International Technologies 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 Payer International Technologies Gmbh filed Critical Payer International Technologies Gmbh
Publication of WO2009006664A1 publication Critical patent/WO2009006664A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/044—Manufacture and assembly of cutter blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/486—Fine ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5445—Particle size related information expressed by the size of the particles or aggregates thereof submicron sized, i.e. from 0,1 to 1 micron
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5454—Particle size related information expressed by the size of the particles or aggregates thereof nanometer sized, i.e. below 100 nm
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • C04B2235/6022—Injection moulding

Definitions

  • the invention relates to a blade block for electric erasers with a plurality of shearing blades and a knife carrier, a method for producing blade blocks for electric shavers and an electric shaver with a shaving head comprising a shaving foil and cooperating with the shaving foil shear blades of a blade block.
  • Electric shavers are known in different designs.
  • dry shavers with rotating knives, in which the relatively small diameter shear blades are arranged resiliently in a shaving head
  • dry shavers are especially known in which in a base part a drive motor is arranged, which is coupled to one or more blade blocks or disk carriers, the blades of the blade blocks being driven to oscillate.
  • the oscillation direction of such blade blocks extends in this case in the direction of the axis of the envelope of the blades or blades, these blades interact with shear films, which in turn may be formed curved.
  • the curvature of the shear blades in this case follows the envelope or the envelope surface of the Schermes- ser, wherein the length of such a shear foil is measured in the axial direction of the curvature of the envelope surface.
  • a plurality of such blade blocks may be driven parallel to each other in the same direction or in opposite directions oscillating motion, wherein the shear foil having a corresponding plurality of curved surfaces, which cooperate with the envelope surfaces of the shearing blades.
  • the shaving foil is usually arranged in a shaving head frame and can be removed together with the shaving head frame for cleaning.
  • the shaving head frame is detached from the base part, with the result that at least the shaving foil is generally separated from the base part together with the shaving head frame.
  • the oscillating blades of the blade blocks and the Foil are cleaned separately, which can be restored by simply plugging the operating state.
  • shear sheets and blade blocks allow a certain degree of elastic compliance. Both the relatively thin-walled shear foil, which is elastically deformable, and the blade block, which is resiliently connected to the drive and is resiliently pressed against the shear foil, can yield under compressive stress, this evasive movement of the better adaptation to the skin to be shaved serves.
  • the foil is usually made of metal.
  • Conventional blade blocks have a knife carrier, which is usually made of plastic.
  • the knife carrier carries a plurality of parallel cutters, which in turn are made of metal.
  • the production of such a blade block is relatively expensive.
  • the individual shearing blades must be made. In a separate manufacturing step, the blade carrier is made, this usually takes place by means of an injection molding process. Finally, the individual shearing blades must be fixed to the knife carrier.
  • the present invention aims to simplify the manufacture of blade blocks and to provide blade blocks which are more wear resistant than conventional blade blocks and which therefore have a long service life.
  • the blade block of the type mentioned is characterized essentially by the fact that the blade block is made of ceramic material.
  • the use of ceramic here has a number of advantages over the previous use of metal. First of all, ceramics are characterized by a much longer service life due to the higher wear resistance. The coefficient of friction between the ceramic blade block and a metallic foil is much lower than when using conventional metal cutting knives.
  • the biasing force between the blade block and the foil ie, the force with which the blade block or blades of the blade block are pressed against the foil can be increased, which naturally improves the cutting performance without sacrificing in terms to have to accept the wear of the blades.
  • the use of ceramic also allows in a simple way the production of colored blade blocks, since the color can be influenced by simply adding appropriate color pigments, without affecting the material properties.
  • the production of colored blade blocks can serve aesthetic purposes; on the other hand, this can also create the conditions for improving hygiene. In particular, when using light colors impurities are better visible, so that the user is prompted to appropriate cleaning measures.
  • Another advantage of using ceramic material for the blade block is a changed or improved vibration behavior during operation. Due to the low coefficient of friction between the ceramic blade block and the metallic shear foil, the vibrations are reduced and the noise development is significantly reduced.
  • the blades and blade carrier of the blade block are integral with each other made of the same ceramic material, whereby the manufacturing cost can be reduced.
  • the blade block may in this case be advantageously made of a ceramic powder by means of a sintering process.
  • the surface quality of the blade block and in particular the surface quality of the blades can be adjusted by the choice of grain size of the powder used and adapted to the respective need.
  • oxide ceramic is selected as the ceramic material.
  • the ceramic material is mixed with a binder component. Both organic or inorganic binders are conceivable as binder components.
  • Al 2 O 3 powder having a particle size of 400-500 nm is preferably selected as the ceramic material.
  • a particularly smooth surface can be achieved if, as is the case with a preferred embodiment, ZrO 2 powder having a particle size of 30-45 nm is selected as the ceramic material.
  • the blades of the blade block may advantageously have a thickness of 0.05-0.2 mm, preferably 0.1 mm. With such a thickness it is ensured that the individual recesses in the shaving foil are not covered too much by the shearing blades during the oscillating movement of the shearing knives, which would lead to a reduction of the cutting performance.
  • the side surfaces or at least one side surface of the blades of the blade block can be inclined or formed with changing angles of inclination, wherein the side surface (s) of the blades of the blade block in a first range an inclination ⁇ between 0.5 - 3 °, preferably 1.5 °, and in a second region have a slope ß between 1 - 10 °, preferably 5 °.
  • the blades of the blade block can be advantageously formed by parallel, arranged with full cross section slats. This increases the stability of the blades.
  • the method according to the invention for the production of blade razors for electric razors is essentially characterized in that a mixture containing a ceramic powder and an organic or inorganic binder component is formed into a blade block by means of an injection molding process and that the so-called green compact is sintered.
  • a mixture containing a ceramic powder and an organic or inorganic binder component is formed into a blade block by means of an injection molding process and that the so-called green compact is sintered.
  • a mixture containing a ceramic powder and an organic or inorganic binder component is formed into a blade block by means of an injection molding process and that the so-called green compact is sintered.
  • a series of complex process steps is necessary.
  • the metallic shearing blades must first be punched out of a foil, subsequently hardened and finally ground.
  • the blade blocks are manufactured in one piece, to which conventional tools suffice.
  • the material By mixing a ceramic powder with a binder component, the material can be formed directly into a blade block in a conventional injection molding machine, requiring relatively low injection temperatures. For example, with ceramic powder of oxide ceramics, an injection temperature of 30-40 ° can be selected.
  • the green compact produced in this way is subsequently baked to the final product by sintering methods customary in ceramic processing technology. It is only necessary to take into account the shrinkage occurring during the sintering process, but tests have shown that the shrinkage is only in the range of 10 to 12%. Overall, with the production method according to the invention a very cost-effective method ren indicated, wherein the starting material is available at very low cost.
  • Al 2 O 3 is selected as the ceramic powder.
  • Al 2 O 3 powder has a grain size, ie a diameter of the grain, of approximately 400-500 nm.
  • the use of Al 2 O 3 as starting material has the advantage of low acquisition costs and furthermore the advantage that only a relatively small shrinkage is observed during sintering.
  • the blade blocks made of Al 2 O 3 have an above-average rigidity.
  • ZrO 2 is chosen as the ceramic powder.
  • ZrO 2 grains have a diameter between 35-40 nm.
  • the rigidity of the blade blocks made of ZrO 2 is lower than when Al 2 O 3 is used .
  • a stronger shrinkage can be observed during sintering than when using Al 2 O 3 .
  • the use of ZrO 2 powder can offer advantages in terms of processability.
  • the production method according to the invention furthermore has the advantage that, if necessary, various additional production steps can be supplemented.
  • the green compacts produced by the injection molding process already have such sufficient rigidity that, according to a preferred procedure, parts of the greenware, in particular the shearing knives, can be subjected to laser treatment to achieve the desired cutting edge geometry prior to the sintering process. In this way, for example, a positive cutting angle can be created. It is also conceivable to create special contours between the individual blades of the blade block.
  • the shearing blades of the blade block after the sintering process a Be subjected to grinding for the production or sharpening of cutting edges.
  • FIG. 1 shows a ceramic blade block according to the invention in a perspective view
  • FIG. 2 shows an enlarged view of individual shearing blades
  • FIG. 3 shows a cross section of a shearing blade
  • FIG. 4 shows a shearing foil.
  • the knife carrier is denoted by 1 and has a plurality of parallel cutters 2.
  • the shearing blades each have cutting edges 3, which in turn extend parallel to each other.
  • the individual shearing blades have a common envelope surface.
  • the blade block is driven in a direction normal to the planes of the individual shearing blades extending direction according to the double arrow 4 to oscillating motion.
  • the individual shearing blades 2 are enlarged darg Horwitz, resulting from the cross-sectional view of FIG. 3 shows that the side surfaces 5 and 6 of the blade 2 are bent or formed with a changing angle of inclination.
  • the inclination a is selected to be as small as possible, about 0.5-3 °, preferably about 1.5 °, in order to achieve better removal from the injection mold, but still the lowest possible negative cutting angle at the cutting edge 3.
  • This first region 7 preferably extends over the length of 0.05-0.3 mm, preferably approximately 0.1 mm, away from the cutting edge.
  • a subsequent region 8 of the inclination angle ß is chosen to be larger, with an angle of 1-10 °, preferably about 5 °, is advantageous to increase the thickness of the blade and thus the stability.
  • the transition between the regions 7 and 8 can also be designed to extend, resulting in a curved surface.
  • the shearing blades cooperate with a shaving foil 9 shown in FIG. 4, which at least in a middle section in FIG Substantially corresponds to the common envelope of the blades 2.
  • the shearing foil 9 has a plurality of recesses 10.
  • the blade block is made of ceramic material.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nanotechnology (AREA)
  • Forests & Forestry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Abstract

Dans le bloc de résonance pour appareils de rasage électriques selon l'invention avec une pluralité de lames de rasage (2) et un support de lames, le bloc de résonance est fabriqué en matériau céramique.
PCT/AT2008/000253 2007-07-12 2008-07-10 Bloc de résonance pour un appareil de rasage électrique et son procédé de fabrication WO2009006664A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1093/2007 2007-07-12
AT0109307A AT505419A1 (de) 2007-07-12 2007-07-12 Klingenblock für elektrische rasierapparate sowie verfahren zu dessen herstellung

Publications (1)

Publication Number Publication Date
WO2009006664A1 true WO2009006664A1 (fr) 2009-01-15

Family

ID=39731465

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2008/000253 WO2009006664A1 (fr) 2007-07-12 2008-07-10 Bloc de résonance pour un appareil de rasage électrique et son procédé de fabrication

Country Status (3)

Country Link
AT (1) AT505419A1 (fr)
TW (1) TW200911488A (fr)
WO (1) WO2009006664A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114643600A (zh) * 2022-03-25 2022-06-21 珠海新秀丽家居用品有限公司 毛发剪的刀头及制造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205600777U (zh) * 2015-12-07 2016-09-28 吴让攀 一种新型旋转电动剃须刀的刀头

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2154397A1 (de) * 1971-11-02 1973-05-10 Bernt Prof Dr Spiegel Scherkopf fuer trockenrasierapparate
WO1993008141A1 (fr) * 1991-10-21 1993-04-29 Sandvik Ab Procede de fabrication d'un corps en ceramique
EP1555093A1 (fr) * 2004-01-15 2005-07-20 Izumi Products Company Procédé de fabrication d'un couteau intérieur pour un rasoir électrique réciprocant et couteau intérieur pour un rasoir électrique réciprocant
US20050260454A1 (en) * 2004-05-19 2005-11-24 Fang X D AI2O3 ceramic tools with diffusion bonding enhanced layer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2154397A1 (de) * 1971-11-02 1973-05-10 Bernt Prof Dr Spiegel Scherkopf fuer trockenrasierapparate
WO1993008141A1 (fr) * 1991-10-21 1993-04-29 Sandvik Ab Procede de fabrication d'un corps en ceramique
EP1555093A1 (fr) * 2004-01-15 2005-07-20 Izumi Products Company Procédé de fabrication d'un couteau intérieur pour un rasoir électrique réciprocant et couteau intérieur pour un rasoir électrique réciprocant
US20050260454A1 (en) * 2004-05-19 2005-11-24 Fang X D AI2O3 ceramic tools with diffusion bonding enhanced layer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114643600A (zh) * 2022-03-25 2022-06-21 珠海新秀丽家居用品有限公司 毛发剪的刀头及制造方法
CN114643600B (zh) * 2022-03-25 2024-06-04 珠海新秀丽家居用品有限公司 毛发剪的刀头及制造方法

Also Published As

Publication number Publication date
TW200911488A (en) 2009-03-16
AT505419A1 (de) 2009-01-15

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