A pelletizing machine has a rotatable matrix disc, a plurality of vertically adjustable pressing rollers which control position of the upper and lower plungers, a drive for a height adjustment of the rollers, a housing accommodating the drive, and a bearing block supporting the pressing roller and releasably connected with the housing.
Brief description of the pelletizing machine
FIG. 1 is a partial plan view of a matrix disc with a pressing rolling, of a extruder machine in accordance with the present invention;
FIG. 2 is a partial section of the rotary pelletizing machine in accordance with the present invention;
FIG. 3 is a view showing a pressing roller with a drive of the inventive pelletizing machine, in a working position; and
FIG. 4 is a view showing a pressing roller with its drive in a disassembled position.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A pelletizing machine in accordance with the present twin screw extruder has a rotatable matrix disc which is identified with reference numeral 2. The matrix disc 2 is provided with a plurality of matrix openings uniformly distributed over its periphery. Pellets are pressed in the matrix opening 4 of the matrix disc 2. The compression is performed by upper plungers 10 and lower plungers 12 in so-called pressing stations.
A partial radial adjustment is advantageous when the matrix disc 2 together with the upper plungers 10 turbine bearing and the lower plungers 12 must be turned out of the single screw extruder for their cleaning or their exchange. In this case the turning movement is not hindered by the pressing roller 6 which is located in its working position.
A complete separation of the pressing roller 6 with its bearing block 8 and its linear guide 20 from the drive housing is performed when the pressing rollers with their bearings must be worked for example for the purpose of maintenance.
A height adjustable spindle 38 for adjusting of the pressing roller 6 is also a component of the drive in the housing 28. The adjustment is performed by a worm wheel 34 which cooperates with a worm 36. The adjustment can be performed manually or mechanically. The spindle 38 carries a force measuring device 40 with a pressing mushroom projection 42, on which the bearing block 18 is supported directly or indirectly.
A plurality of cable connections for measurement and control of a device are not shown in the drawings. They are connected to the housing 28 through an end switch 44. For releasing the pressing roller 6 or for separating of its drive, the adjusting spindle 38 in correspondence with FIG. 4 is moved so that the receiving flange 24 together with the bearing block 18 can be withdrawn from the guide 30 in direction of the arrow 50.
Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.