Patent ID: 6632009
Filing Date: 2003-10-14
Classification: B29C

Abstract:
In combination with an extruder having a housing and a screw rotatable in the extruder housing about an axis, a drive comprising:a drive housing fixed to the extruder housing; an extension fixed directly to the screw and extending along the axis into the drive housing; a sleeve-shaped rotor centered on the axis in the drive housing and coaxially surrounding the screw extension; a coupling sleeve fixed to the rotor and closely surrounding the screw extension; axially extending and interengaging formations rotationally coupling the coupling sleeve and the extension to each other; an end plate extending generally perpendicular to the axis and fixed to the coupling sleeve and to the rotor, the coupling sleeve and the plate rotationally fixing the rotor directly to the screw extension; and a sleeve-shaped stator centered on the axis, fixed in the drive housing, and coaxially surrounding the rotor, the stator and rotor together forming a motor that can rotate the screw about the axis.