DD277399A1 - HOLE FOR SNOWFITS OF A MEATWOLF - Google Patents

Abstract

The invention relates to perforated discs for meat and wolf-like shredders, they can be used and applicable in all areas of the meat industry. The perforated disc is constructed according to the invention according to certain conditions, which relate both to the area ratio as well as the total occupancy rate of holes / breakthroughs. The area ratio has a value of 0.2 ... 0.3 and the total occupancy rate corresponds to a value of 60 ... 80%.

Description

Explanation of the essence of the invention

The object of the invention is to develop a perforated disc for cutting sets in meat grinders, which reduces the mechanical resistance of the processed material, while ensuring a sufficient occupancy of the effective annular surface with through holes and an additional Prozeßguthrennung in Schubricht>: ng secures. According to the invention, the object is achieved by a perforated disc in which the area ratio of drilled to drilled surface corresponds to the ratio = 0.2... 0.3 and the total occupancy rate with through holes / bore in the effective knife blade range is 60% %, wherein the lands, forming a system of secondary cutting edges, have a width dimension derived from the bore diameter in the range of 0.125 to 0.25 x bore diameter. With the design of the perforated disc according to the disclosed features, in particular for fine perforated discs, a prerequisite is given to ensure easy penetration of the webs into the processed material, whereby a homogeneous comminution of the processed material and a substantial increase in the efficiency is achieved with low flow resistance. It is also part of the invention that the area ratio, based on the area relationships between 3 holes on the annular surface, derived from the bore diameter and the web width and the condition

π xd ²

must be fulfilled.

Under these conditions, the support material is largely withdrawn from the material to be processed and, in particular, the permeability of the webs, which form as secondary cutting, into the material to be processed is possible. o that the degree of filling of the bore of 0.7 ... 1.0 and more increases. The total occupancy rate, ie the area-appropriate occupancy of the. effective annular surface of the perforated disc with holes and surface error excludes, according to the condition

0.6 ... 0.7 *

D, ² -D ₂ ²

reached.

Ultimately, the relationship ensures

Pressure = - at constant pressure, variable sinking surface an infinite increasing force, which on the

Processing material acts, so that the crushing and flow conditions are significantly improved for the processed material. The distribution of the openings / holes on perforated discs takes place in a radial and / or tangeni.ialen distribution system. With the disclosed solution, the necessary penetration work into the processed material with respect to a certain time unit, taking into account the rotation angle of the knife blades and the speed is achieved, and the entire processed material is properly clamped and cut. The comminution process is improved when the webs are made at a certain angle and thus support the pulling cut.

embodiment

The following embodiment is intended to illustrate the invention, the drawing shows in

Fig. 1: Relationships and Pobildungen to the assignment of a perforated disc

Fig. 2: the area ratio of 3 holes

Fig. 3: the arrangement of non-circular openings on a perforated disc

FIG. 1 illustrates the area distribution of a perforated disk with the entire effective base area 1 of the knife hub surface 2 and the remaining area 3.

The base area 1 is limited by the radii R ₂ and R ₃ , the knife hub surface 2 by the radii R _t and R ₂ . while the residual surface 3 is formed by the radii R ₃ and R ₄ .

The base area 1 represents the most important area, since on this the occupancy with holes 4 or openings 5 with the requirement to secure the Belegungsgracl of more than 60-80%. At the same time, the 60 ° triple system for the distribution of holes is also the basis for this assignment.

The distribution system itself is formed by two shapes of surfaces. Once through the base 1, on which all bores 4 are distributed on clear coordinates L 1 and L ₂ , and the partial surfaces 6, 7.

Dio lengths L ₁ and L ₂ orgebon itself from the diameter of the holes 4 and the Bremen of the webs 8, wherein in the construction for manufacturing einor perforated disc, the diameter of the respective bore ·. and the width of the bridge 8 are to be selected, but the accuracy of the coating, excluding area errors, according to the condition

0.6 ... 0.7 =

to control.

Daboi bedouten Di: Diameter with the measure of R ₃ D ₂ : Diameter with dam Dimension of R ₂ d: Diameter of bore n: Number of holes

The partial surfaces 6,7 are also maximum with entsprec! ends of holes 4 or other breakthroughs, for example, mixed wells or non-circular breakthroughs occupied, but the occupancy rate must not be met by the above condition.

Figure 2 illustrates the area ratio of 3 holes 4 and the resulting ridge 8, wherein the value for the area ratio of the relationship

π xd ²

must correspond.

In detail: d: bore diameter

s: bridge width

This relationship expresses the size of the support surface to the bore surface, secures with the value of 0.2 ... 0.3 the penetrability in cias processing material and the degree of filling = 0.9. At the same time the said relationship rises completely

In general, the technical requirement that the web width only in the maximum ratio of - χ bore diameter

may be and thus always the value max. 0.3 for the area ratio is satisfied.

A further distribution system of angular openings 5 is shown in FIG 3. In this system, the distribution of the breakthroughs 5 on the pitch circles of the effective base area 1 in division over the length L ₁ , taking into account the technological conditions of the respective processed material. Even with these distribution conditions, the conditions described above for the area ratio and the occupancy rate apply.

As can also be seen from FIG. 3, the openings 5 can be arranged in the perforated disks such that the webs ti are at a certain angle under uiriem and execute a pulling cut during the comminuting process.

The advantage of this system is the elimination of dead partial areas and a further increase in the occupancy rate to over 80%.

In general, it has been estimated that adhering to the described conditions / relationships for the area ratio and the occupancy rate perforated discs can be developed that meet the task to ensure a Schnddwirkung by the webs 8 in thrust, or flow direction.

Gin Failure to achieve surface coverage with holes 4 according to the found relationships shall be corrected by redistributing the 60 ° triangle system. ' on the coordinates L ₁ and L ₂ with variation of the web width or the bore diameter is made.

Claims (2)

1. perforated disc for cutting sets of a meat grinder, in particular for fine perforated discs, in which distributed on the effective circular surface holes or openings, characterized in that the perforated disc has an area ratio of drilled to undrilled surface of 0.2 ... 0.3, the Total degree of occupancy corresponds to a value of> 60 ... 80%, wherein the webs (8) form a system of secondary cutting and have a width dimension derived from the bore diameter in the range of 0.125 ... 0.25 χ bore diameter. 2. perforated disc according to claim 1, characterized in that the area ratio 0.2 ... 0.3 of the relationship π xd ²
and the total occupancy rate> 60 ... 80% of the relationship η xd ²
D ₁ ² - D ₂ ² equivalent.
For this 2 pages drawings Field of application of the invention The invention relates to a perforated disc for meat grinders and wolf-like crushers, which is used in establishments of the meat industry willi., And is used in operations of mechanical engineering, producing meat grinders and accessories. Characteristic of the known technical solutions A cutting set for meat grinders consists in the simplest form of a perforated disc and a circumferential on this radial-blade knives, which is driven by a projecting from the axis of a screw conveyor knife pin. The shearing edges of the knife run on the surface of the perforated disc, which is locked in the housing of the meat grinder against rotation. The pre-driven by the screw conveyor processing material is crushed on the inside of the perforated disc by the rotating knife shearing. The perforated discs used, known in a variety of the prior art, so is the task to receive the processed material in the holes to compact, clamp and function with the edge of the hole as a counter-blade for the rotating knife and to allow the cut. Thus, in DE-OS 2601953 a perforated disc has been proposed, which has axially extending through the perforated disc polygonal openings. The material to be processed is gripped and cut between two straight sharp-edged edges, namely the cutting edge of the knife and a rectilinear side of the polygonal holes. The arrangements of the apertures in the apertured disks, generally referred to as holes, are made according to different bore distribution systems and define the desired primary degree of comminution, the grain diameter. In the known perforated discs, the fact does not take into account that the processing material before crushing first a support surface in the form of undrilled faces is available, which forms the main resistance before entering or piercing of processing material in or through the perforated disc. This non-recognition leads to a poor utilization of the area, the so-called area errors to incomplete degree of filling of the holes during flow. These are also not excluded by the perforated discs described in DE-OS 2649305 and 2832922. In both patents is spoken only by a perforated disc with a plurality of through holes or holes, which have a relatively small and uniform diameter and are regularly or irregularly distributed over the Srhnoidenboreich. Object of the invention The invention sets itself the goal of improving the efficiency of meat grinders, in particular the cutting sets and the quality of the finished product, securing another design feature for perforated discs and thus orienting them to the highest efficiency, degree of filling and lowest comminution resistance.