Plasticizer apparatus for ball agitator along screw flights

Details Plasticizer apparatus for ball agitator along screw flights Plasticizer apparatus for ball agitator along screw flights

1973-12-19

1976-03-16

Hornsby, Harvey C.

Plastic article or earthenware shaping or treating: apparatus

Projection

259 10, 259 97, 425208, B29B 110

Patent

active

039441920

ABSTRACT:
This plasticizer screw, for advancing molten plastic to an injection mold, has a row of balls behind the flights of the screw for agitating the plastic to promote better mixing and to eliminate dead regions along the screw. The balls in a continuous row run in a groove in the shank portion of the screw and extend radially beyond the circumference of the shank portion for substantially the same distance as the helical flights of the screw thread. The raceway groove, in which the balls are held, terminates at an abutment where the balls move into a passage within the shank portion of the screw, and they travel back through this passage to an outlet end where they pass back into the other end of the raceway groove.

REFERENCES:
patent: 603411 (1898-05-01), Rutschman
patent: 3149377 (1964-09-01), Morse
patent: 3530534 (1970-09-01), Pomper

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