Patent ID: 7413131
Filing Date: 2008-08-19
Classification: B29C,Y10T

Abstract:
1. A nozzle tip comprising: a tip retainer comprising a first and a second end region and a central bore extending between said first and said second end regions, said central bore comprising an internally threaded portion disposed proximate said first end region configured to removeably engage with a nozzle housing and an internal annular step extending generally radially inwardly proximate said second end region, wherein a distal most end face of said second end region is substantially radially planar; a tip insert axially received in said central bore of said tip retainer, said tip insert further comprising a tip channel, at least one outlet aperture in fluid communication with said tip channel, and an external annular step extending generally radially outwardly from an exterior surface of said tip insert that substantially abuts against said internal annular step of said tip retainer, wherein said internal annular step and said external annular step comprise a stop shoulder that limits axial movement of said tip insert from said first end region towards said second end region of said tip retainer; a seal ring comprising a third end region having a distal most substantially radially planar end face and a fourth end region configured to seal against at least a portion of a mold, wherein said seal ring comprises a material having a lower thermal conductivity than said tip retainer; and a substantially radially planar weld junction disposed between said distal most substantially radially planar end faces of said tip retainer and said seal ring.