Summary of the pelletizing machine

Accordingly, it is an object of the present invention to provide a rotary pelletizing machine which avoids the disadvantages of the prior art.
More particularly, it is an object of the present invention to provide a rotary pelletizing machine in which the pressing station is formed so that its significant components can be released as a structural unit or structural units from the twin screw extruder, so as to be exchanged when needed by another similar unit or units, and therefore to reduce the standstill time of the machine or to simplify complete dismounting of a matrix disc.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a rotary pelletizing machine in which a pressing roller is supported in a bearing block which is connected with the housing of its drive.
When the pelletizing machine is designed in accordance with the present pet recycling a pressing roller with its bearing block can be separated or released from its drive with its housing connected with the machine housing, as a structural unit and removed from the machine as a structural unit. Therefore, it is possible to remove on the drive housing with both drive and control parts as a further structural unit from the machine.
In accordance with another feature of the present invention, the bearing block of the pressing roller is preferably provided with a receiving flange which is held displaceably in a guide of the housing of the drive for the pressing roller.
The advantages of the inventive machine also reside in the fact that the pre-pressing stations and main pressing stations can be formed uniformly and independently from one another, and removed as a structural unit from the pet sheet . In other words they can be maintained at a remote place so that meanwhile they can be replaced by similar parts. This is true both for the pressing rollers with their bearing and as an enclosed structural unit, as well also for the drive housing with the drive for the pressing roller which must be worked after being separated from the pelletizing machine, for the purpose of change of maintenance, an exchange of the matrix disc, cleaning or repair.
A further advantage of the above mentioned divisibility is obtained when during a dismounting of a pressing roller it is not necessary to release all electrical conductors and to remove the end switches and therefore it is not necessary to adjust again the whole pressing station.
The drive housing for the pressing roller can be releasably connected with a housing of the pelletizing machine.
A transmission can be arranged in the drive housing for lifting and lowering of the pressing roller.
Finally, the adjusting spindle can have a force measuring device on which the bearing block of the pressing roller is supported.