Method and a device for a bale press
AssigneePersoner Verkstad, AB
InventorGunnar Kurt Arne Tillgren
Life of this patent
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Abstract
The invention pertains to an improved method and device for increasing the extent of compaction of materials having a tendency to reexpand when relieved after being compacted in a bale press. For being able to compensate for the reexpansion of the material compacted in a bale press when pushed forward through the press channel during compacting, it is suggested that the abutment, against which the material is compacted and which consists of the bale last produced, is tightened when the plunger of the bale press has reached a predetermined distance before its forward end position. This results in the desired maximum compaction being achieved when the plunger occupies its forward end position.
Claims6
In a method in pressing in a bale press material which after compacting tends to expand due to stored inherent resiliency when relieved from stresses, said material being compacted in a channel during application of equally large but opposite pressing forces from on one hand a movable plunger means and on the other hand the rear surface of the bale last produced, said surface serving as an abutment, which last-produced bale is fixed in position by a tightening means until a predetermined pressing force has been obtained when the compacted material together with the bales ahead is displaced by a force exerted by said plunger means, which force exceeds the force exerted on the material by said abutment, the improvement comprising fixing the abutment once more by further action of said tightening means when said plunger means is located at a predetermined distance from its forward end position, the reexpansion taking place in said material during the pushing forward of the material being compensated for in the final movement of said plunger means towards its forward end position.
In combination with a bale press having a press channel having a movable plunger means therein to compact a material charged into the channel against the rear surface of a previously compacted bale serving as an abutment, said press channel being further provided with tightening means adapted to fix said previously compacted bale in a position in said channel until a predetermined press force is applied by said plunger means, and a first control means operably associated with said plunger means to signal an actuation system to release said tightening means, when said predetermined press force is applied, to permit a displacement of said compacted material towards the discharge end of said press channel, a device for compensating for reexpansion of said compacted material which tends to expand after compacting when relieved of stresses due to stored inherent resiliency, said device comprising a sensor means adapted to sense when said plunger means reaches a position a predetermined distance before its forward end position, and a second control means, responsive to the actuation of said sensor means, being arranged to further actuation of said tightening means for repeated fixing of the position of said abutment, said reexpansion taking place in said compacted material during said displacement of said compacted material being compensated for in the final movement of said plunger means towards its forward end position.
Dependencies are inferred from the claim text.