MULTISTRAND EXTRUSION HEAD FOR POLYMERIC MATERIALS Russian patent published in 1994 - IPC

FIELD: production of cords. SUBSTANCE: extrusion head has spinneret formed as disk with forming channels disposed in peripheral portions of disk. Guiding protrusion central along longitudinal axis of extrusion head is disposed centrally of disk on seating place. Side surface of inlet portion of protrusion has variable-curvature cross section for providing uniform distribution and compaction of polymer flow. Profiled groove made in outlet portion of protrusion adjacent to the place, where it is connected with spinneret to form permanent bridge and to provide elimination of irregular delivery of extruded product. Acute edge disposed between inlet and outlet portions of protrusion is adapted for accumulating elastic energy and for uniform distribution of polymer into all channels of spinneret. EFFECT: high quality of polymeric cords and enhanced reliability in operation. 2 dwg