| 摘要 |
<p>A valve system for control of polymer flow from a common feed manifold to each of multiple extrusion dies. The valve system comprises one or more fixed rod valves, each of which creates an annular restriction of fixed length in the manifold, and one or more adjustable rod valves, each of which creates an annular restriction of varible length in the manifold or all adjustable rods creating multiple annular restrictions of variable length, for effecting flow control.</p> |
