| 摘要 |
<p>The invention refers to an injection molding apparatus comprising a manifold (12,12a) having a first manifold channel (14,14a) for a first melt stream and a second manifold channel (24,24a) for receiving a second melt stream, said first melt stream exiting said manifold (12,12a) through a first manifold outlet and said second melt stream exiting said manifold (12,12a) through a second manifold outlet (29,29a), a first nozzle channel (52) for receiving said first melt stream from said first manifold outlet and a second nozzle channel (54) for receiving said second melt stream from said second manifold outlet (29,29a), a mold cavity (60) for selectively receiving the first and second melt stream from the nozzle (30,30a) through a mold gate, and an injection piston (70) being slidable between a retracted position and an extended position the injection piston (70) extending through an injection manifold channel (80) located between said first manifold outlet of said manifold (12,12a) and said first nozzle channel (52). The injection piston (70) is slidable through said injection manifold channel (80) and having an outer wall for selectively blocking the communication between said first manifold channel (14,14a) and said injection manifold channel (80), wherein movement of said injection piston (70) towards said extended position forces melt located in a melt chamber (78) of said first nozzle channel (52) to flow into said mold cavity (60).</p> |
