EXTRUDER FOR MANUFACTURE OF FLUOROPLASTIC ARTICLES Russian patent published in 1997 - IPC

FIELD: mechanical engineering and transport; manufacture of rings and gasket of polytetrafluoroethylene (fluoroplast 4D). SUBSTANCE: walls of peripheral supply channels of extruder are made conical, tapering in direction of peripheral forming holes with apex angle of 10-15 degrees. Walls of peripheral supply channels are smoothly mated with central supply channel. Walls of central supply channel are made conical, tapering towards central forming hole with apex angle of 20-25 degrees. EFFECT: enlarged operating capabilities. 2 dwg