Extruder head

Details Extruder head Extruder head

2005-10-11

2005-10-11

Del Sole, Joseph S. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Including means to prepare parison

C425S381000, C425S465000, C425S466000, C425S382400

Reexamination Certificate

active

06953333

ABSTRACT:
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.

REFERENCES:
patent: 6024557 (2000-02-01), Feuerherm
patent: 6354828 (2002-03-01), Feuerherm et al.
patent: 28 23 999 (1979-05-01), None
patent: 0885711 (1998-12-01), None

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