B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/53 (2006.01) B29C 45/20 (2006.01) B29C 45/57 (2006.01)
Patent
CA 2048106
ABSTRACT OF THE DISCLOSURE An injection mold machine is disclosed having a pressure assist nozzle. The machine has an extruder, a nozzle, and an housing mounted between the extruder, and nozzle. The housing encloses the pressure assist nozzle and a fluidic passage connecting the extruder and the nozzle. A bore within the housing extends into the fluidic passage to define a portion of the passage between the extruder and the nozzle. The bore has an aperture within a side wall which acts as a valve opening within the passage which, when closed, prevents flow between the extruder and the nozzle. An annular sleeve is reciprocated within the bore between a retract position, in which the annular sleeve is withdrawn from the passage, and an extend position, in which the annular sleeve is projected into the passage so as to close the aperture. A plunger piston reciprocally resides within the annular sleeve. The plunger piston is held in a retracted position by the annular sleeve while the annular sleeve is in its retract position. When the annular sleeve has been actuated to close the aperture, the plunger piston becomes coupled with the annular sleeve and accompanies the annular sleeve as it continues toward the extend position such that the plunger piston acts to compress the melt within the molds.
Hoover Universal Inc.
Macrae & Co.
Poehlsen Rudolph H.
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