Method of maintaining the force of a stripper blade on an...

Details Method of maintaining the force of a stripper blade on an... Method of maintaining the force of a stripper blade on an...

B - Operations, Transporting

29

C

18/718

B29C 47/10 (2006.01) B29C 47/92 (2006.01)

Patent

CA 2027859

-16- ABSTRACT A METHOD OF MAINTAINING THE FORCE OF A STRIPPER BLADE ON AN EXTRUDER FEED ROLLER CONSTANT AND AN APPARATUS THEREFOR In an extrusion device of the type which has a screw rotating in a housing and Which has a feed section in which a feed roller, cooperating with the screw, is provided, a stripper blade is used to remove the fed material from the feed roller. The present invention provides a method and an apparatus for maintaining the net force acting on the stripper blade to direct it towards the feed roller constant. To achieve this, the force of the fed material which acts in a direction tending to move the feed roller and the extrusion screw apart is measured. An opposing force is applied to the stripper blade in dependence upon the magnitude of the measured force. By so doing, the net force directing the stripper blade towards the feed roller is maintained constant.

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