DE3020900C2 - Cutting blades for mechanical kitchen utensils for shredding food - Google Patents

Description

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The invention relates to a cutting knife according to the preamble of patent claim 1.

Such a cutting knife is known (DE-GM 16 83 648). There is the upper bevel of the Flat cutting edge.

In a further known cutting knife for a meat grinder (DE-AS 16 32 111) are on the surface of the cutting knife grooves formed and arranged in such a way that the cutting edge is toothless, that is, smooth remain. Finally, due to DE-OS 27 57 353 cutting knives for mechanical kitchen appliances are known, whose cutting edges are arcuate and whose cutting edge has only a small number of teeth.

The disadvantage of such cutting knives is that these knives dull relatively quickly, which leads to excessive stress on the cutting edge is due. The cutting result also suffers from this such cutting knife.

The object of the invention is to create a cutting knife in which the sharpness of the cutting edge over a long operating time is maintained and an intensification of the cutting results is achieved.

This object is achieved according to the invention by the features specified in claim 1, wherein Appropriate refinements in claims 2 and 3 are included.

The fact that according to the invention a toothing on the upper bevel of the cutting knife in such a way

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55 is attached so that a toothed cutting edge is created, the cutting area of the knife is enlarged, which results in less stress on the cutting edge and enables better cutting results. The teeth promote the correct grinding of the food to be processed. The toothing can easily be achieved by rolling on the upper bevel. After the depressions have been rolled on the upper bevel, the lower cut is made, creating the cutting edge of the cutting knife, which is provided with a large number of teeth

The invention is explained in more detail below with reference to the drawing. This shows in

F i g. 1 is a plan view of a knife edge;

F i g. 2 shows a section through the cutting knife;

F i g. 3 is a plan view of the cutting knife;

F i g. 4 the geometric shape of the cutting edge; and

F i g. 5 shows a partial plan view of the knife edge and cutting edge.

According to Fig. 1, the cutting edge 1 of the cutting edge 2 is formed in the shape of a circular arc with the radius R 1 and opens tangentially into the circular circumference of the hub 3, the radius R 2 of which is about half as large as the radius R 1.

The end of the cutting edge 1 is preferably offset by an angle γ of 15 ° from the diameter 4, which runs through the point of contact of the circumference of the hub 3 with the cutting edge 1 and through the centers 01 and 02 of these arcs. The upper bevel 6 of the cutting edge 2 is inclined to the base surface of the cutting edge 2 at an angle δ of 7 ° to 15 ° (FIG. 4). The depressions shown in FIGS. 1, 4 and 5 are produced by rolling over the entire width of the upper bevel 6 and are perpendicular to the circular arc of the cutting edge 1. The apex angle α of the individual depressions 5 (FIG. 4) is preferably approximately 80 ° and the division "t" no more than 1 mm. After the indentations 5 have been made, the lower bevel is preferably made by grinding at an angle β of 3 to 15 °, which results in teeth 10 on the cutting edge 1 (FIG. 5), the number of which corresponds to the number of indentations 5. The teeth 10 are very sharp, so that the sickle-shaped cutting edge 1 enables good comminution of food or the like.

The cutting knife consists according to FIG. 2 and 3 from two cutting edges attached to one another on the hub 11 2. The distance between the ends of the cutting edges 2 is slightly smaller than the inner diameter of the container in which the knife 1 rotates in the direction of the arrow

Since the recesses run along the entire width of the upper bevel, it is possible to use the cutting edges regrind a few times, maintaining the specified shape, which also results in the Lifespan of the knife extended.

For this purpose 3 sheets of drawings

Claims (3)

Patent claims: 1. Cutting knife for mechanical kitchen appliances for chopping food, on which the The cutting edge runs along a circular arc extending tangentially from the circumference of the hub and is formed by a bevel of the upper and the lower knife surface, characterized in that that on the upper bevel (6) depressions (5) are formed which are perpendicular run to the arc of the cutting edge (1) and are not more than 1 mm apart and which as a result of cutting through with the lower bevel (9) form a toothed cutting edge, whose teeth (10) are at the same distance as the depressions (5) from one another. 2. Cutting knife according to / \ nspruch 1, thereby characterized in that the cross section of the depressions (5) is triangular 3. Cutting knife according to claim 1 or 2, characterized in that the recesses (5) with a Vertex angle (ä) of 80 ° are formed.