DE202023000575U1 - Worm head for transport and working worms in shredding machines working according to the mincer principle - Google Patents

Abstract

Screw head for transport and working screws in grinding machines working according to the grinder principle for processing animal or vegetable raw materials, hereinafter referred to as screw head for transport and working screws, characterized in that the head (1) of the screw (2) is designed to be detachable from the base body (3). and can be exchanged.

Description

The invention includes the advantageous design of transport and working screws for grinding machines, such as those used for the comminution of meat and other animal or vegetable raw materials.

Especially in the meat industry, but also in other areas, machines with a transport and working screw are used, which accepts the raw material to be shredded, compresses it through the rotation of the screw and feeds it to the cutting set through a housing.
The state of the art includes a large number of screw variants which differ in size and geometric design of the screw threads.
All variants serve the purpose of ultimately achieving material compaction, which is the prerequisite for penetrating the perforated disc openings of the cutting set. The forces acting on the auger during raw material intake, conveying and pressure build-up also lead to high loads on the auger, the knife journal and the entire cutting set, depending on the consistency and sometimes very low temperatures of the material being conveyed.
All components involved in the work process are subject to high wear.
For this reason, knives and perforated discs are made fully functional again by regrinding or, depending on the degree of wear, replaced with new tools.
The housing can also be reworked if necessary.
Refurbishment measures on the worm, in which mainly the gear area for the pressure build-up in front of the cutting set is affected by increased wear, can only be implemented with great effort.
There are no snails known in the industry where the particularly stressed areas can be removed and individually regenerated or replaced.

The aim of the invention is to make the screw thread head as the transfer area of the raw material to the cutting set exchangeable for new transport and working screws that are to be regenerated.
At the same time, the possibility of replacing the knife pin should be included.
A possible adaptation to the special raw material to be shredded by changing the geometry of the screw flights should also be mentioned as a goal.
The implementation of the innovation should lead to a considerable reduction in costs for the measures required to restore the full efficiency of screws.

The task of the innovation is that the auger, auger flight head and knife pin can be manufactured as individual parts and assembled into a complete transport and working auger.
This also includes the necessary driving connections for joint rotation and for maintaining the position of the screw threads and the knife pin.
At the same time, the position of the individual parts must be secured.

The task is solved as in the exemplary embodiment described below.

As in the 1 and 2 shown, the worm body (3), worm thread head (1) and knife pin (4) are manufactured individually.
The outer diameter of the worm body is adapted to the inner diameter of the worm thread head in such a way that the head can be pushed onto the base body.
A hole in the auger body (3) is used to hold the knife pin (4). Feather keys (5) ensure the driving connections between the head and knife pin with the base body.
The worm thread head (1) and the knife pin (4) are held together by the washer (7) secured against loosening.

During the shredding process, the head and knife pin are pressed against the cutting set and the union nut holding the cutting set by the feed pressure of the raw material and cannot move.
A small weld seam, adhesive bond or a screw connection starting from the front side is sufficient between the head and the base body to hold the components on the base body.
The short cutting edges (8) on the gears of the head (1) are exposed to increased wear and are therefore provided with a hard metal layer in order to extend their useful life.

In addition to the completely new production of a transport and working screw shown in this exemplary embodiment, it is also possible to refurbish a screw that has already been in use in accordance with the innovation and to restore full functionality at significantly lower costs.
To do this, the section of the base body to be replaced is turned and grooved to such an extent that a new worm gear head can be pushed on.
The blade pin can be retained or, if necessary, used as a newly manufactured component in accordance with the innovation.
The interchangeability of a worm gear head is connected with the possibility of the geometric Design of the gears and additional short cutting to adapt to a special raw material to be shredded.
At the same time, it is possible to refurbish a partially worn barrel by slightly turning off the oversized support elements of the barrel and inserting a new worm thread head with a correspondingly larger outer diameter.

The innovation creates optimal conditions for being able to replace worn parts individually or as a whole and thus to restore improved and complete functionality of transport and working screws at low cost.

• In 1 ist eine Transport- und Arbeitsschnecke mit dem ablösbaren Schneckengangkopf, inkl. Messerzapfen dargestellt.
• Die 2 zeigt eine Schnittdarstellung des ablösbaren Kopfes mit dem Messerzapfen und den Befestigungen am Grundkörper.

Further advantageous refinements of the invention result from the invention claims and the drawings according to FIG 1 and 2 .

• In 1 a transport and working worm is shown with the detachable worm thread head, including knife pin.
• The 2 Figure 12 shows a sectional view of the detachable head with the knife spigot and attachments to the body.

Reference List

1

worm gear head

2

Snail

3

screw body

4

knife tang

5

keyed connections

6

cochlea of the head

7

screw-on disc secured against loosening

8th

Carbide layer on the short cutting edges

Claims (7)

Screw head for transport and working screws in crushing machines working according to the mincer principle for processing animal or vegetable raw materials, hereinafter referred to as screw head for transport and working screws, characterized in that the head (1) of the screw (2) is designed to be detachable from the base body (3). and can be exchanged. Worm head for transport and working screws claim 1 , characterized in that the blade pin (4) for receiving the cutting tools from the head (1) is detachable and can be replaced. Worm head for transport and working screws according to claims 1 and 2 , characterized in that the head (1) of the worm (2) and the knife pin (4) each have a feather key connection (5) with the worm body (3). Worm head for transport and working screws according to claims 1 , 2 and 3 , characterized in that the arrangement of the feather key connections (5) can ensure the positions to be maintained between the screw threads of the head (6) and the knife position. Screw thread head for transport and working screws according to the above claims, characterized in that a disc (7) which can be screwed onto the basic screw body (3) and is secured against loosening forms a fixed connection for the head (1) of the screw (2) and the knife pin (4 ) allows with the base body (3). Screw flight head for transport and working screws according to the above claims, characterized in that the components pushed onto the screw base body (3) can also be screwed, glued or welded to the base body. Screw flight head for transport and working screws according to the above claims, characterized in that the flights of the head (1) which are subject to increased wear are provided with a hard metal layer on the short cutting edges (8).

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