DE7335278U - Cutter head for dry razors and the like - Google Patents

Description

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Lüdenscheid, September 25, 1973

LOdenicheld, Oenekinger Wm Telephone 2Ö655

Stedlng & Co., 588 Lüdenscheid - Kai ve utility model registration

Cutter head for dry razors and the like.

: The invention relates to a

· (") Number of knife blades arranged at a distance from one another and provided with knife heads for Dry razors and other shaving devices, where the front surfaces of the Sesssrklin = gen on the inside ^: 'Jias a multitude of thin shear elements having openings and fittingly in operation execute a movement relative to the shear element, the cutting edges formed on the knife blades passing through the opening of the

Material to be cut through the shear element Shear off (hair). Such "cutter heads" extend, for example, in dry razors with so-called perforated shaving foils, i.e. thin ones apertured metal foils, together. Mostly by a vibrating armature motor - for Sckerqersät with rotating knives but also by a rotating motor -

; driven cutter head shears by means of the

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protruding from him, with cutting edge? equipped knife blades that pass through the sieve of the sehec film Beard hairs of the user

So far, the shaving heads have been made from a large number of thin knife blades made of high-quality steel, which have been connected in various ways to form a knife head *. This connection of the single blades to the knife head is done either by lining up the knife blades and tubes or rods and establishing the appropriate distance between the blades s 4a ** xc that Ir., »total • In StAJTCi Hsss & vkefif arises. Alternatively {wuxtan 44. · · 1η «« 1ηαη MessAfkl Ingen in the

) akand do a DiT4 «J * euiitfoirw used the

! Jana in the Orueliieu Avarfahjren with metal

was cast, whereby «U · knife blades were connected to the die-cast body produced in this way to form a unit. It is clear that the lin "elher" division of the knife blades made of high quality steel material and its subsequent union into one Messerblcck Xn jsdeia case laborious and

is difficult, whereby the manufacturing costs for such cutter heads are still disproportionate are high.

In another known shaver with

$ Rotating drive provides the total

* Knives made of high quality metal

head radially projecting arms from a hub that can be placed on the drive shaft, at the protruding ends of which the radially extending cutting edges are ground. These cutting edges work with one circular shear element together, which also extends substantially radially Has slots.

In contrast, the invention is based on the object of creating a cutter head that by making it easier to manufacture and using an overall smaller amount of high quality Material in the area of the knife blade is significantly cheaper to manufacture.

Starting from a cutter head of the type mentioned at the beginning, this task is

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according to solved in that the cutter head has a cutter head base body which integral with the ripper that protrudes from it and that forms the knife blades flow deformable and after deformation cured or solidified material and at least in the area of the knife blades with a galvanic and / or electrolessly applied layer made of a sufficiently hard cutting material to form a stable cutting edge is provided, dfe has sharp-edged cutting edges in the area of the end faces of the knife blades. A separate production and subsequent assembly of the individual knife blades is therefore not according to the invention Rather, the knife blades are formed by ribs projecting in one piece with the knife head base body and made of a material whose strength is considerably lower than that of the known knife blades is · The actual cutting edges and their edge retention is determined by the layer

achieved from cutting material, which i can be made considerably thinner than this the well-known steel knife blades is the case. :

ί> The sharpness of the cutting edges and their exactness Alignment such that it is on the cutting element, for example a perforated shaving foil rest, it is ensured that the cutting edges on the end face of the knife blades after application of the cutting material by grinding, polishing, lapping or the like. Mechanical Post processing is generated.

The new knife block can be designed so that between the integrally protruding from the Hess irkopfgrundkörper, the knife blades forming wells are formed, the bottom of which is fully kouainen and is formed by the material of the knife 'block base body.

Alternatively, the design can also be made so that in one piece between the protruding from the cutter head body, the ribs forming the knife blades are formed by depressions, and that from the bottom openings for discharge extending out from the depressions and penetrating the knife block base body of trapped in the depressions

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) senem, sheared material to be cut is provided

r: are, this embodiment being particularly preferred when the Ver

depressions formed in the cutter head such that a discharge of the cut material along the outside of the cutter head is not possible =

The material chosen for the boiler head raw body is preferably plastic, on which the layer of cutting material is applied. Plastics that can be metallized, for example ABS plastics, have proven their worth here. On the other hand, metal that can be processed by die casting can also be used.

A hard metal alloy, for example a hard nickel or hard chrome alloy, is provided as the cutting material.

Alternatively, a finest solid particles that can be electroplated, ζ · Β · made of silicon carbide, aluminum oxide, tungsten carbide, titanium carbide and derglo Softer carrier material as cutting material can be used.

7135278 -ιλ 74

If the cutter head according to the invention for a

is seen, he is in a preferred training! guide form designed so that the cutter head base body is designed as a rotationally symmetrical body from which the knife blades projecting ribs forming, in particular it can have the shape of a circular disc provided with a central receptacle £ 'Ur a drive shaft on which

side the ribs forming the knife blade are arranged

The new cutter head is manufactured in such a way that a cutter head blank is first made from a flow-deformable material, which is sufficiently solid after hardening or solidification , the shape of which largely corresponds to the cutting head which divides the cutter head, then on the cutter head blank at least in the area of the in one piece / ribs protruding from it, a layer of sufficiently hard cutting material is applied in a galvanically and / or electroless reduction process) adhering,

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and that. Finally, the end faces of the dor ribs sntHpreehsnd Fesm dee associated shear element such reground or mechanically finished in some other way that the layer forms a cutting material sharp cutting edges in the processed area.

In a further development according to the invention, the procedure can be such that the End faces of the ribs of the me «* ej? Bloekroh-

The material is processed to such an extent during post-processing that the layer can be applied using the Tyrolean or electroless method generated rounding of the rib edges in Cutting edge area can be removed

The mechanical post-processing can be carried out in such a way that a cutting material layer remains on the end faces of the ribs opposite flanks of the ribs applied cutting material layer -connects. Here eise zuemnsenhMagesde. the on Ribs fully formed

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constantly, i.e. also in the area of their frontal area overlapping cutting material layer generated. As a result, such materials can also be used for the base body ^

which is not intimate, ie sufficiently adhesive ^! Enter into connection with the material of the cutting material layer.

However, since the layer of a cutting material in choosing a suitable material for the Messerkopfrohkörper and using suitable galvanic or electroless method auehhinreichend fest &. ~ T 4em Messerkopfrohkörper can be connected, can however also possible to proceed in alternative embodiment of the erfindungsgeaäöen traversed so that the on the end face of the ribs of the measurer block razor peri layer of self-cutting material applied during post-processing and the most exposed part of the ribs is processed.

In the case of the most recently mentioned procedure, the exposed end faces of the ribs can also be treated with the rib pateriai

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selectively attacking agents are chemically etched or dissolved in such a way that the rib end faces recede from the cutting edges formed on the layer of cutter material. As a result, cutting edges are also formed on the sides of the cutting edge material layer facing the rib material, so that the cutter heads manufactured in this way have twice the number of cutting edges, ie higher cutting performance. However, the prerequisite for this is a sufficiently thick toffschicht "and therefore without support by 4" n Ripper <material sufficiently rigid "cutting *. it should be noted DAFL Rich X ausästet 4 * fl entire fin material or ausseiest must be. A small recess 4mg end faces of the ribs with respect to d 'n% tixet laughter of the atehen band at Sohne Idwark layers of fabric is enough

The fermentation is not on the manufacture limited by cutter heads for dry razors, but can be used with all shearing devices with those with Cutter heads with cutting edges with opening 4

Working together cutting elements exhibiting openings.

The invention is in connection with the following description of exemplary embodiments explained in more detail with the drawing, namely shows:

1 shows a perspective view of a cutter head provided for a dry razor;

Fig. 2 shows a line along the line II-II in Fig. 1;

FIG. 3 is an enlarged partial sectional view of the one in FIG. 2 in a dash-dotted circle III shown part of the cutter head; Fig. 4 is a partial sectional view corresponding to Fig. 3 another embodiment of the new cutter headj Figure 5 is a partial perspective view of another embodiment of the new one Cutter head |

6 shows a partial sectional view along the line VI-VI in FIGS. 5j and 7 shows a plan view of a rotating cutter head in an embodiment according to the invention.

7335271-1S. 7 *

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1 shows an embodiment of a cutter head according to the invention for a dry shaver provided with a vibrating armature drive. ^{The ribs l a} forming the knife blades have, in the embodiment shown, semicircular face

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surfaces V that work together with a shaving foil curved in a complementary semicircle. The cutting edges l ^c are from the intersection of the side flanks of the ribs I ^s and the end surfaces 1 resulting edges formed the ribs l ^a contact, as can be seen best of Sehnittansicht shown in Fig. 2, in one piece from a cutter head body 1 before. The cutter head base body 1 and the ribs 1 ^a therefore consist of the same material, for example a metallizable plastic material that can be processed by casting, pressing, injection molding or the like and then solidifies in a cutter head shape or is hardened, i.e. also made of die-cast metal.

The knife block 1 is provided in the usual way with devices for fastening on the swing axis of the Schwiygahker motor Xn Fig.

is only a schematic for this purpose
elongated recess 1 and one
Cross hole 1 shown.

The actual sharpness and edge retention

the cutting edge is ensured by a thin layer of sufficiently hard cutting \

i material on the ribs l ^a ensured. '

In the Pig ·. 3 and 4 this layer is 1 * j

over in thickness. Shown seven * The j layer l ^g consists, for example, of an I.

ge!

Galvanic applied hard knuckle gel:

tion · If the cutter head base body 1 "'and the ribs 1 ^{a are} made of plastic, the surface of the ribs must be metallized before the galvanic application of the hard nickel layer in order to allow the electrolytic application of the nickel layer
to enable · This is done by in itself
known electroless plating, ie
by a reduction process, the! Cutter head is first metallized with copper, for example. Layer I ⁹ off
In the case discussed last, cutting material actually consists of a very
thin metallization layer on which
the hard nickel layer is applied galvanically.

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When manufacturing the cutter head body 1 from metal in the die-casting process Application of a first metallization layer under the actual cutting material layer is omitted because the material itself is used for galvanic deposition of layers required *) is electrically conductive.

Since with the galvanic application of layers due to the known side growth the edges do not appear sharp-edged, but rounded and there continues to be an exactly aligned position of the cutting edges on the Ribs is essential, the ^{cutter head is mechanically reworked after application of the:} Sehneidwesksfcoff layer I ⁹ by grinding, polishing, lapping or the like, whereby the sharpness and uniform position of the cutting edges 1 ^{C is} achieved

i mechanical processing can be carried out according to

example according to Fig. 3 so that on your

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End faces 1 of the ribs l ^a still part of the layer l ^g remains, so that the cutting material layer l ^g in this case completely covers the cutting head at least in the rib area.

Alternatively, the post-processing according to the embodiment shown in FIG. 4 can be carried out in such a way that the entire layer l ^{g lying on the end face l c} and, if necessary, also part of the ripples ^{a are} processed. The rib material is then exposed at the end faces 1. If the layer 1 ^{g is} sufficiently thick, the rib material exposed on the end face 1 can be selectively etched out or released so that the d «| Rib flanks facing inner sides of the cutting material layer S- '"' eidkanten arise. The doubling of the number of cutting edges in this way increases the performance of the cutting head considerably, but, as mentioned, the application of a relatively thick and sufficiently strong layer of cutting material is required it should be noted that the etching depth t when etching out the

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Front surfaces l ^{b are kept} relatively small fcasrii. It is therefore not necessary to etch the ribs over their entire length so that they have approximately the depth of the groove-like depressions 1 formed between the ribs.

In the one shown in Figs The sheared off! Hairs formed in the between the ribs 1,

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deten depressions i aufganossaen and can;

flow sideways along the grooves «. You can also use the bottom of these wells openings 1 penetrating through the knife block base body can be provided, through which the j The sheared material is also discharged to the underside of the cutter head.

Fig · 5 and 6 show partial views of a further embodiment of a cutter head 2, i in which of mutually perpendicular ribs 2 ^Ä voneiander separate encryption j depressions 2 are formed ^e. The end faces 2 of the ribs 2 ^a lifgen in this case in a Sbene so Dafi also the associated cutting element is flat. There is a side

Drainage of the visual material from the V @ £ tlefus-

• gen 2 ^h in ■ · · · · · - 17 - »* · · · · η previously discussed j need the »· · · · Fl · not in this case • t · »■ combined with is possible,

fourth embodiment described openings 2 may be provided at the bottom of the depressions. The structure of this cutter head and its production largely corresponds to that in connection with FIGS to 4 illustrated embodiment.

Fig. 7 finally shows an embodiment of a blade head 3 for rotating drives, in which the blade head base is formed as ^d 3 scheibi iirmiger body of the upper flat side of the approximately radially arranged ribs 3 ^a rorstehen. The center of the disk-shaped cutter head body 3 a receptacle 3 in the form of a RELATIONS with lateral Anfl & apertured is provided which allowed the plugging of the blade head 3 to the associated drive axis, the application of the layer 3 ^g of cutting material and the anschlii QOifljl formation of Sehneidkanten 3 ° on the end faces 3 of the ribs 3 ^a takes place * - .. just like in the previously described embodiment B.

75JS27I-1174

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What is essential is the one-piece manufacture implemented in all the exemplary embodiments. development of a knife head raw body made of flow-deformable material that is sufficiently solid after hardening or solidification the shape of the cutter head to be produced already largely corresponds to it. On this one Cutter head blank is total.:; W. at least in the ribs, the layer applied from hard "cutting staff, with the cutting edges grinding through

cowardly · Mftflhbearbail exercise. the stixn

flat of the ribs geloildofc

731527l-ts.7t

Claims (10)

III 111 · - 19 - Protection claims 1. With a large number of knife clusters arranged at a distance from one another hener knife head for dry razors and j other shear devices, in which the ^frontal: surfaces of the knife blades on the inside of a j a plurality of openings aufwei-! send, fit thin shear element and carry out a relative movement during operation of the shear element, with the j i sound cutting edges formed through the opening of the shearing element shear off the material to be cut (hair), characterized in that the cutter head (1,2,3) has a cutter head base body (l ^c 2,3) which is integral with the cutter blades forming the cutter head protrude- ft B S. the ribs (1,2,3) made of a flow-deformable material which has hardened or solidified after the deformation and at least in the area of the knife blades with a galvanically and / or electrolessly applied layer (I ⁹ , 2 ⁹ , 3 ^g ) of a material for formation a stable cutting edge is provided with sufficiently hard cutting material adhering to it, which in the area of the end face 733127 (1-1.174 is * I · I I I »1 ■ - »I - 20 - the knife blades (1, 2, 3) dcc has angular cutting edges (1, 2, 3). 2. Cutter head according to claim 1, characterized in that the Sehneidfcanten (1 °, 2 ^C , 3 °) v » y * t V \ is produced on the end faces (1 _t 2.3} of the knife blades after the cutting material has been applied by grinding, polishing, lapping or similar mechanical processing . ■ 3 · Cutter head according to claim 1 or 2, characterized in that; characterized in that between the one-piece ^: from the cutter head base body (1,3) projecting ribs (l ^a , 3 ^a ) forming the knife blades, depressions (l ^h ) are formed, the bottom of which is completely closed and made of the material of the M
is formed. d d Material of the cutter head body (1, 3) 4. cutter head according to claim 1 or 2, characterized in that between the integrally from the cutter head body (1,2) projecting, the knife blades forming ribs (l ^a L 2 ^a ) recesses (l ", 2 ⁿ ) are formed, | and that from the bottom of the recess (I ¹ , 2), • · ι - ²¹ - L outgoing, the cutter head body through- setting openings tl ~ _? 2) are provided for the removal of sheared material enclosed in the depressions (1, 2). 5. Cutter head according to one of claims 1 to 4, characterized in that the cutter head (1,2,3) consists of plastic, on which the layer (l ^g , 2 ⁹ , 3 ⁹ ) is applied from cutting material. 6. Cutter head according to one of claims 1 to 4, characterized in that the cutter head (1,2,3) consists of a metal that can be processed in a die-casting process, on which the layer (l ^g , 2 ^g , 3 ^g ) of cutting material is applied . 7. Cutter head n <__. iinem of claim 1 to 6, characterized in that the cutting material consists of a hard metal alloy, such as a hard nickel or hard chrome alloy. • ···· «· ti ·· • · t r ι 8. cutter head according to one of claims 1 to 6, characterized in that the cutting material consists of a galvanically installable, finest solid particles, e.g. made of silicon carbide, aluminum oxide, tungsten carbide, Titanium carbide and the like. Staggered softer carrier material consists. 9. Cutter head according to one of claims 1 to 8, for a shearing device working with a rotating drive, characterized in that the cutter head base body (3) is designed as a rotationally symmetrical body, of which the ribs forming the knife blades (3 ^a ) protrude. 10. cutter head according to claim 9, characterized in that the cutter head base body (3 f the shape of a with a central receptacle (3) has a drive shaft provided circular disc on which the shaft holder (3) opposite the flat side of the knife blade forming ribs ^(a 3). For the applicant Patent attorney: /