"Separation set with multi-stream strength-related raw material removal from the tool system area of shredding machines operating according to the Wolf principle"

Abstract

Separating set with multi-stream, strength-related raw material removal from a region of a tool system of comminution machines operating according to the grinder principle, hereinafter referred to as separating set with multi-stream, strength-related raw material removal, characterized in that high-strength processing material which has a disruptive effect on a comminution process is directly discharged via a second conveying plane, referred to as a knife hub screw (7), in a knife hub (1) of a tool working area before reaching a perforated disk surface (2) of a perforated disk (5), wherein the second conveying plane is formed by conveying elements (8) in the form of grooves and cutting edges (3) in the knife hub (1) of a knife (4), wherein the perforated disk (5) has cutting elements (6) as counter-cutting edges to the knife hub screw (7), and wherein the knife hub screw (7) has the cutting edges (3) with a feed edge (9).

Description

[0001] It is state-of-the-art to separate the various components of animal-derived material during comminution in grinders according to their diverse structural and strength properties and to discharge them separately. For this purpose, tools, knives, and perforated discs with special geometric shapes and discharge mechanisms are used.

[0002] The key point is that the entire feed stream, consisting of meat and fat components as well as collagen and other disruptive components such as tendons and cartilage, is completely pressed onto the surface of the perforated disc by the pressure exerted by the working screw.

[0003] The rotating knives ensure that the soft raw material components, such as lean meat and fat, are primarily cut and discharged via the holes in the perforated disc.

[0004] Due to their strength properties, the high-strength components of the material being processed, such as collagenous tissue, tendons, cartilage, and bone fragments, can only be pressed into the holes to a limited extent. They create drainage obstructions there, thus having a longer residence time on the working surface of the perforated disc and being directed into drainage channels.

[0005] In principle, they remain on the disc surface and migrate either to the disc center or through the blade and disc design to the outer edge of the blades. There, these substances are discharged via a discharge channel with lower resistance.

[0006] The same applies to gap openings or other counterpressure reducing structural elements in the center of the disc.

[0007] There are various control mechanisms that can vary the back pressure, as well as discharge conveyor systems to discharge the material flow in a controlled manner.

[0008] During the ongoing separation process, pre-shredding or multi-stage shredding in the cutting set reduces the size of the collagen components as impurities, but the pieces are still larger than the holes in the final perforated discs. In this form, they hinder the discharge of all comminution materials by increasingly clogging the holes and the entire working surface of the perforated disc.

[0009] As the softer parts of the lean meat and fat drain away, the amount of collagen constantly increases, resulting in increasing pressure and a decreasing number of flow-through holes.

[0010] This condition can only be eliminated if the material to be separated is transported away from the working surface of the perforated disc at approximately the same speed. This is achieved by means of a discharge device that reduces pressure or resistance.

[0011] EP 0 900 595 B1 discloses a cutting blade assembly for meat mincing machines for separating gristle, cartilage, tendons, and bone fragments from the product to be minced. The task to be solved is to develop a cutting blade assembly for meat mincing machines that ensures higher pressure ranges can be used compared to existing solutions, thus enabling a more qualitative separation of hard components from the product.

[0012] To solve this problem, a cutting blade set was developed for meat mincing machines, specifically for meat grinders, which enables operation in the high-pressure range while simultaneously ensuring the quality-compliant separation of unwanted components from the minced material. This is achieved by designing the cutting blade set as a pressure system. This closed pressure system forms in the center of the perforated separating discs, selects the separation products through forced conveyance, and discharges them laterally outward from the center of the perforated separating discs via specially designed and arranged drainage channels.

[0013] All known applications for separating soft and solid components of the material being processed remove the high-strength contaminants from the working area of ​​the discs. However, they are prone to failure, ineffective, and require significant effort for assembly, disassembly, and cleaning.

[0014] The invention aims to take over the solid components of the conveyed material flow at the end of the working screw from a second conveying level before it is pressed onto the working surface of the perforated disc and thus to cause it to pass through the central separation before the soft components.

[0015] A hub conveyor system with cutting elements on the back of the knife body in conjunction with the material-feeding working screw is intended to capture the high-strength material components accumulating there, draw them into the screw grooves and feed them to the discharge central bore.

[0016] There, special shredding elements resulting from the geometric design of the perforated discs are intended to directly remove the solid components during the shredding process before they can escape into the working area of ​​the perforated disc and clog its holes.

[0017] The aim is to achieve a significant increase in the performance of the grinding machine by homogenising the actual material to be processed, while at the same time reducing the susceptibility to failure and improving the quality of the end product by effectively separating soft and solid raw material components.

[0018] It is therefore the object of the invention to integrate conveying and cutting elements into the knife hub which are capable of grasping elongated, connected collagen strands at the end of the conveying path of the working screw and at the transition to the tool system with an arranged gripping element and of guiding them specifically into the disc center before they are introduced into the bores of the perforated disc and of cutting them out in a non-coherent manner.

[0019] The object is achieved according to the invention as in the embodiment described below.

[0020] The working screw 12 is located in the screw housing 13. A knife pivot 14 is attached to the working screw 12 for knife drive and rotation. The knife 4 is mounted on the knife pivot 14 with its square drive 15.

[0021] The perforated disc 5 is secured against rotation in the cutting part housing 16 in a known manner with a key and groove and is clamped together with the union nut 17.

[0022] For the purpose of discharging the separated material, a discharge pipe 18 is screwed into the thread 19 of the perforated disc 5. This fulfills the functional task of the separation set.

[0023] The processed material in the form of pieces of meat is fed through an opening above the working screw 12 and the screw housing 13 by rotation to the cutting set 4, 5 and pressed onto the perforated disc 5. The working screw 12 and knife 4 rotate and push the material across the perforated disc surface 2 of the perforated disc 5. The raw material is a multi-material system interwoven with collagenous tissue and tendons along muscle strands and a layer of fat, which serves to transmit power in the animal. In this sense, it is a layered material composed of various solid types. The strength values ​​of lean meat / fat differ from collagenous tissue by a factor of 1 to 40 to 60. This means that lean meat and fat can be pressed into the holes of the perforated disc 5 with a pressure of approximately 6 to 10 bar, while the high-strength material components require approximately 40 bar.The conveying process separates the softer parts from the fabric through rotation and these are pushed through the holes in the perforated disc.

[0024] During processing, coherent collagen strands form along the length of the working screw 12 in the conveying area, which ultimately wind around the knife pin 14 at the end of the working screw 12 and clog the knife area around the cutting edges 20 and up to the perforated disk 5. To prevent clogging, the knife 4 has a draw-in edge 9, which grasps the wound-up collagen and draws it into the conveying channel of the groove of the knife hub 1, thus subjecting it to the discharge movement of the knife hub screw 7 and comminuting it in the combined cutting system consisting of perforated disk cutting edges and the cutting action of the sharp-edged conveying hub. This prevents the collagenous tissue from sticking together due to friction when heated and clogging the holes in the perforated disk 5 or adhering to the entire perforated disk surface 2 of the perforated disk 5.

[0025] Since the collagenous tissue particles accumulate in the screw center due to winding, the accumulated high-strength raw material can be captured by a second conveying level, referred to here as the knife hub screw 7, formed by grooves and cutting edges 3 in the knife hub 1. With the knife rotation, it can be conveyed directly in the disk center to the discharge opening via the discharge pipe 18. This prevents this material portion from clogging the space of the perforated disk surface 2 and the knife blades because it is separately conveyed away before reaching the knife cutting area.

[0026] The cohesive mass of high-strength materials necessitates separation. This is achieved by positioning cutting edges 6 in the central bore 10 of the perforated disc 5. With the angular position 11 of the conveying elements 8 of the knife-hub screw 7 at a range of 15 to 30 degrees, the solid material is separated from the soft material in front of the perforated disc 5. While the solid material is discharged via the discharge pipe 18 during the conveying process, the soft raw material is crushed to the desired grain size through the bores of the perforated disc 5.

[0027] Further advantageous embodiments of the invention emerge from the claims and the drawings.

[0028] The Fig. 1 shows the arrangement of the functional parts of the separating set in a sectional view with the cutting part housing 16, the working screw 12 and knife 4 with knife hub screw 7, perforated disc 5, discharge pipe 18 for solid material and union nut 17.

[0029] Out of Fig. 2 shows the hub conveyor system of the knife 4, while in Fig. 3 the arrangement of the cutting elements 6 as counter cutting edges in the perforated disc 5 is shown. List of reference symbols: 1 knife hub 2 perforated disc surface 3 cutting edges of the knife hub 4 knives 5 hole disc 6 cutting elements in the perforated disc as counter cutting edges 7 knife hub auger 8 conveying elements of the knife hub screw 9 Feed edge for collecting the material to be separated 10 Center hole of the perforated disc 11 Angle position from 15 to 30 degrees 12 working screw 13 snail shells 14 knife tenons 15 Drive square of the knife 16 Cutting part housing 17 Union nut 18 discharge pipe 19 Thread of the perforated disc 20 Cutting the knife

Claims

[1] Separation set with multi-stream strength-related raw material removal from one area of ​​a tool system of shredding machines operating according to the Wolf principle, hereinafter referred to as separation set with multi-stream strength-related raw material removal, characterized by in that high-strength processing material which has a disruptive effect on a comminution process is directly discharged via a second conveying plane, referred to as a knife hub screw (7), in a knife hub (1) of a tool working area before reaching a perforated disk surface (2) of a perforated disk (5), wherein the second conveying plane is formed by conveying elements (8) in the form of grooves and cutting edges (3) in the knife hub (1) of a knife (4), wherein the perforated disk (5) has cutting elements (6) as counter-cutting edges to the knife hub screw (7), and wherein the knife hub screw (7) has the cutting edges (3) with a feed edge (9). [2] Separating set according to claim 1, characterized bythat the discharge of the high-strength processing material is possible both by a geometry of the knife hub (1) and by the cutting elements (6) in a central bore (10) of the perforated disc (5) by an angular position (11) of 15 to 30 degrees to each other. [3] Separating set according to claim 1 or 2, characterized by that a control mechanism for influencing a discharge quantity can be additionally positioned on a discharge pipe (18) screwed into a thread (19) of the perforated disc (5) for the purpose of discharging the high-strength processing material. [4] Separating set according to claim 3, characterized by that the control mechanism can be used in a needs-based and task-related manner. [5] Separating set according to claims 3 or 4, characterized by that the control mechanism is provided with spring elements and adjustable devices for influencing quality. [6] Separating set according to claims 3 to 5, characterized bythat the discharge quantity can also be influenced by purely mechanical constriction in or with the discharge pipe (18).

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