Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1985-06-14
1986-08-05
Miles, Tim
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
425169, 116208, 324207, 1985021, 198657, G01R 3312
Patent
active
046042512
ABSTRACT:
An apparatus and method for indicating wear or misalignment between a screw and barrel in a plastic material feeder includes forming an aperture in a side wall of the barrel and positioning a proximity detecting probe in the aperture. The probe generates a detection signal having a magnitude proportional to the distance between a selected reference point on the inner wall of the barrel and an outer edge of the flight as it rotates past. The detection signal is stored and displayed as a visual indication of the distance. The stored signal can be selectively reset and two or more probe detection signals can be selectively displayed.
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