| 摘要 |
The adaptor, which can be applied to the delivery end of the extruder barrel, comprises a plurality of ducts for feeding corresponding extrusion heads, radiating from a common manifold chamber and each provided with a butterfly valve for the mutual adjustment of the flows of thermoplastic material in the respective ducts. Preferably the ducts with their respective valves are identical to each other and the valves are adjusted to give extruded products which are identical to each other. |
