METHOD FOR DETECTION OF FRICTION BETWEEN EXTRUDER'S SCREW AND CYLINDER AND ITS APPARATUS

摘要

PURPOSE:To detect a frictional state simply neither by drawing out a screw nor by decomposing a cylinder. CONSTITUTION:A friction-detecting method between a screw of an extruder and its cylinder and the apparatus are so constructed that a frictional quantity is detected by variation of distance signals 9b, 10b from a pair of distance sensors 9, 10 provided at positions near a screw ground part 8a or by variation of an oscillation signal from a sensor 13 in a wall 4aA of the cylinder 1.