summary of pelletizing machine
summary of pelletizing machine
summary of pelletizing machine
The present invention relates to a rotary pelletizing machine.
More particularly, it relates to a rotary pelletizing machine which has a rotatably supported matrix disc, a plurality of upper and lower plungers guided in the matrix disc, and pressing rollers which control the position of the plungers in a pressing station and are supported so that they are height adjustable by a drive.
Pelletizing machines of the above mentioned general type are known in the art. In the construction of the pelletizing machine or press it is desired to form them so that a conversion of the machine for subsequent manufacturing of a different pellet type as well for cleaning of individual machine parts can be performed in shortest possible time, so that the stoppage times are very short. For this purpose it is considered as advantageous when the matrix disc together with the lower and upper plungers can be removed from the machine laterally for the exchange. This removal is however hindered by the pressing rollers which are provided in the pressing stations and especially when two pressing stations are provided, as in the case conventionally in high output machines. It has been proposed to subdivide each pressing station into a pre-pressing station and a main pressing station each having an upper pressing roller and a lower pressing roller, so that two diametrically opposite pressing stations have total eight pressing rollers.
In the known pelletizing machines the dismounting of a pressing station requires a significant time since the important components of the pressing station in the machine must be broken into its individual parts and cannot be released in the pressing station as a structural unit from the machine. Cleaning and maintenance works can also be performed only within considerable time, and after an exchange of worn parts a new adjustment must be made.
SUMMARY OF THE INVENTION
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 machine, 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 invention 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. Thus, for a dismounting of the matrix disc, only partial displacement of the pressing roller for the release of the matrix disc during its mounting is possible.
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 pelletizing machine. 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.
In accordance with still another feature of the present invention, the receiving flange has a column, in which the bearing block is guided in a height adjustable manner.
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.
The transmission can be formed as a worm gear transmission and cooperate with an adjusting spindle which carries the bearing block 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.
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