| 摘要 |
<p>Apparatus for extruding a plurality of tubes of plastics material simultaneously for blow molding purposes comprising a plurality of extrusion heads, each having an accumulator chamber from which plastics material can be discharged intermittently to form the tubes, and a mechanism operatively connected to discharge means associated with each accumulator chamber for synchronizing the filling and discharging of the accumulator chambers so that a single source of plastics material can be used to fill the accumulator chambers at a substantially uniform rate and the mold halves of a single blow mold can be opened and closed on the extruded tubes which are discharged simultaneously and will be of uniform length.</p> |
