Patent ID: 7207790
Filing Date: 2007-04-24
Classification: B29C

Abstract:
1. A needle assembly for use in an injection molding nozzle, the nozzle comprising a body with a front end with an interior shoulder and a central bore terminating at the front end for passage of melt into a mold gate, the needle assembly comprising: an outer retaining piece having a central opening with an interior shoulder and adapted to be removeably secured to the front end of the body; an inner piece adapted to be received within the outer retaining piece and having a radially enlarged portion defining opposed faces, a melt passage and a tip, the tip being adapted to extend through the central opening of the outer retaining piece; and at least one spacer having a given thickness, the spacer being selectively positioned between one of the opposed faces on the inner piece and either the interior shoulder in the front end of the body or the interior shoulder in the outer retaining piece to permit selective adjustable axial positioning of the tip of the inner piece with respect to the central opening of the outer retaining piece upon assembly of the outer retaining piece and inner piece with respect to the front end of the body, the inner piece being stationary with respect to the outer piece after assembly.