Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means between charger and mold to cut off flow of...
Patent
1991-11-29
1993-10-19
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means between charger and mold to cut off flow of...
425564, B29C 4523
Patent
active
052539989
ABSTRACT:
The strokes performed in the direction of the injection axis by a valve-actuating cylinder disposed near the rear portion of the plasticizing cylinder are transformed by a motion-deflecting lever into opening and closing movements of the valve needle. The motion-deflecting lever is disposed within the protective skeleton, which surrounds the plasticizing cylinder. The lever is pivoted to the skeleton by a supporting pivot assembly. The valve needle extends rearwardly to a location which is radially aligned with the feed screw when it is in its foremost position. The valve needle extends in a needle-guiding bore, which is formed in the plasticizing cylinder and has a relatively wide rear portion having an open rear end at a location which is radially aligned with the back flow valve when the feed screw is in its foremost position. Owing to that design the assembly by which movement is effected by the valve-actuating cylinder in the direction of the injection axis and transmitted to the valve needle, which is inclined relative to the injection axis, can be manufactured at much lower cost.
REFERENCES:
patent: 4863362 (1989-09-01), Hehl
patent: 4886439 (1989-12-01), Hehl
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