Buffer store for polymer melt, e.g. for spinning cellulose solutions, includes pressure equalization chamber divided into two compartments

摘要

A buffer store to maintain a constant polymer melt supply to an extruder has an annular chamber (5) held at constant pressure by a movable piston (8) loaded with a pressurized fluid (9). The chamber (5) contains interconnected inlet (5a) and an outlet (5b) compartments, corresponding in cross-section with the inlet (3) and outlet (4) connections, each fitted with a flow guide nose (14,15). An Independent claim is also included for a complete extrusion installation including a buffer store of this type.