Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With accumulator – trap chamber – or serially arranged valves...
Patent
1990-10-24
1991-12-10
Heitbrink, Timothy
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With accumulator, trap chamber, or serially arranged valves...
26432819, 425561, 425562, 425564, B29C 4502
Patent
active
050713418
ABSTRACT:
An injection molding machine having an extruder, a nozzle, and an housing mounted between the extruder and nozzle. The housing encloses a pressure assist nozzle and a fluidic passage connecting the extruder and the extruder nozzle. A bore within the housing extends into the fluidic passage to define a portion of the passage between the extruder and the extruder 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 An annular sleeve is reciprocated within the bore between a retract position, in which the annular sleeve is withdrawn from the passage, and an extend position, in which the annular sleeve is projected into the passage so as to close the aperture.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 retracted 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 to continues toward the extend position such that the plunger piston acts to compress the melt within the molds.
REFERENCES:
patent: Re28721 (1976-02-01), Farrell
patent: 2862241 (1958-12-01), De Mattia
patent: 3335457 (1967-08-01), Martin, Jr.
patent: 4155969 (1979-05-01), Hendry
patent: 4412807 (1983-11-01), York
Heitbrink Timothy
Hoover Universal Inc.
LandOfFree
Injection molding machine with pressure assist nozzle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Injection molding machine with pressure assist nozzle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Injection molding machine with pressure assist nozzle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1036926