| 摘要 |
The disclosure relates to a hydraulic ram operated extruder (10, 11, 13, 14) having an extrusion die (12) from which an extrudate is delivered and a motor driven cutter (48, 49) at the die to sever the extrudate repeatedly to produce individual pieces of extrudate. A hydraulic fluid circuit includes a pump (16) and control valves (19, 22, 23) delivers hydraulic fluid to the ram of the extruder at a substantially constant volume flow-rate and a control device responsive to the speed of advance of the ram in the extruder controls the motor device of the cutter to produce blanks of substantially equal volume.
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