An extruder head for extrusion blow-molding plastic containers includes a ring gap nozzle with a mandrel and a ring-shaped nozzle body. An elastically deformable sleeve is arranged on an end of the nozzle outlet side and defines a gap width which can be varied by axial setting movements of the mandrel and/or the nozzle body. The geometry of the nozzle gap can be influenced by radially deforming the sleeve with setting devices during the extrusion of a hose-shaped preformed blank. The sleeve may be moved in a radial direction and is guided on sliding surfaces which support it in upward and downward directions. The sleeve may be in the form of a cylinder or tube. A lower edge of the sleeve shapes a cross-section of a melt stream exiting from the ring gap nozzle.

 
Web www.patentalert.com

< Impact extrusion molded article, and impact extrusion molding method, and an impact extrusion molding apparatus

< Capacitive monitors for detecting metal extrusion during electromigration

> Heated roller for a heating device for warming a film strip comprising thermoplastic plastic

> Ice dispenser for cold therapy

~ 00213