Extrusion control apparatus
Abstract
Abstract THE DIAMETER OF A CYLINDER OF EXTRUDED PLASTIC FOOD MATERIAL IS MAINTAINED WITHIN CLOSE TOLERANCES BY EXTRUDING THE CYLINDER THROUGH A NOZZLE AND ALLOWING IT TO PASS FROM THE NOZZLE A SHORT DISTANCE IN AN UNSUPPORTED CONDITION TO A TAKE-AWAY CONVEYOR WHICH CARRIES THE PRODUCT TO A CUTTER. THE EXTRUDER FROM WHICH THE MATERIAL IS EXPELLED COMPRISES ONE PLATE OF A CAPACITOR. THE OTHER PLATE IS LOCATED IN A POSITION SPACED FROM THE EXTRUDED MATERIAL. THE TAKE-AWAY CONVEYOR IS RUN AT A SPEED FROM ABOUT 2 TO 20% FASTER THAN THE AVERAGE SPEED OF THE MA- TERIAL BEING EXTRUDED TO IMPART A CONTROLLED DEGREE OF STRETCH IN THE EXTRUDED MATERIAL. THE SPEED DIFFERENTIAL IS INCREASED WHEN THE STRETCHED MATERIAL DROOPS BELOW A PREDETERMINED POSITION AND DECREASED WHEN THE EXTRUDED FOOD MATERIAL ADJACENT THE NOZZLE RISES ABOVE A PREDETERMINED POSITION AS SENSED BY THE CHANGES IN CAPACITANCE BETWEEN THE PLATES AS A RESULT OF THE CHANGE IN POSITION OF THE EXTRUDED FOOD MATERIAL.
Inventors
- 👤 Byron W Meyer
- 👤 William F Wright
Bibliographic Details
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