B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/62 (2006.01) B29C 45/23 (2006.01)
Patent
CA 2056772
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. Said lever is pivoted to said skeleton by supporting pivot means. 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 means by which the movement effected by the valve-actuating cylinder in the direction of the injection axis is deflected and transmitted to the valve needle, which is inclined relative to the injection axis, can be manufactured at much lower cost.
Hehl Karl
Macrae & Co.
LandOfFree
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