DK152899B - PILLET RING PRESS - Google Patents

Description

in

DK 152899 B

The invention relates to a pelletizing press of the kind specified in the preamble of the claim.

Such presses are preferably used for compact compression of feed materials and generally have a vertically arranged ring die. At compression, the feed materials are obtained in the form of feed pellets or briquettes.

Such presses are known in which two or more press rolls are used. If three or more press rolls are used, there is the disadvantage that the free space needed to bring in the goods to be compressed becomes very small.

This disadvantage is particularly noticeable with long fiber products. In the case of a symmetrical arrangement of two press rolls, said disadvantage does not occur. However, both kinds of presses have the common disadvantage that there are greatly varying loading conditions for all the parts of the press, such as the die, bearings, press rollers and support shaft. The changing load conditions are induced by varying thicknesses of the press load, and as a result, a complete arbitrary displacement of the press rolls will occur in an area of several millimeters within the press space. The direction of this displacement is determined by the vector of the compressive compressive force, and this vector can occur in a range of 0-360 °.

The present invention has for its object to provide a pelletizing press of the kind in question, at

DK 152899B

2 which has avoided the greatly varying loading conditions, and this is achieved according to the invention by the press being designed as indicated in the characteristic part of the claim.

5

This design achieves that a load is always obtained only with the resultant compressive force in an area of two adjacent quadrants relative to the main bearing. The resultant force 10 affects the main bearing in such a way that in each load case, the magnitude of the magnitude load of the outer ring need only be calculated.

The invention is further explained with reference to the drawing, in which: FIG. 1 is a schematic representation of one embodiment of the press roller bearing for the press roller system; and FIG. 2 is a section along line A-A of FIG. First

Two pressing rollers 1 on support arms arranged on a main or support shaft 3 are, see fig. 1, arranged in a vertical ring die 2 so that a center angle between the radii from the support shaft 3 to the shaft pins of the two pressing rollers 1 is an angle α between 150 ° and 170 °.

Fx and F2 denote pressing forces which together give a resultant compressive force Fr which is transmitted over the support shaft 3, a main bearing 4 and a hollow shaft 5 to the machine frame. This creates favorable loading conditions for the main bearing 4, thereby increasing the service life of the whole system and a 3

DK 152899B

bearing with relatively little carrying capacity. Furthermore, the alternating bending effect on the support shaft 3 is reduced, whereby its diameter can be reduced or a material of relatively low strength can be used.

5

As additional advantages, a reduction of the wear on the die and the pressing rollers is achieved.

The feed material to be processed in the press is fed between the rollers 1 and compressed between the rollers and die 2 and pressed out as pellets or briquettes through the die bores.

Claims (1)

DK 152899 B Pilleting press for the manufacture of feed pellets, comprising a rotatable (3) rotatable, perforated annular die (2) which cooperates with two rotary press rollers (2) arranged within the annular die (2). 1), characterized in that the center angle (a) between the radii from the support shaft (3) to the shaft pins of the two press rolls is between 150 ° and 170 °.