Patent ID: 6354828
Filing Date: 2002-03-12
Classification: B29C

Abstract:
An extrusion head for blow forming extruded plastic containers, comprising:a ring gap nozzle (1) having a ring-shaped nozzle body (3) and a mandrel (2) centrally disposed within said nozzle body (3); an elastically deformable sleeve axially supported on segment-like surfaces of cams which are coupled to a jacket side and spaced apart relative to each other in the circumferential direction; setting devices (5) for radially deforming said elastic sleeve (4); whereby said sleeve (4) defines a nozzle gap, the geometry of which can be adjusted by deforming said sleeve (4) during the extrusion of a hose-like, preshaped blank; and wherein at an inlet side, said sleeve (4) is supported within said nozzle body (3) with axial displaceability so that when said sleeve is radially deformed an inlet side edge of said sleeve (4) is movable in the axial direction, and the cams (6) are disposed in a plane below the inlet side edge and are supported on a support surface (14) of said nozzle body, said support surface (14) permitting a tilting movement of said cams.