INJECTION GATE INSULATING AND COOLING APPARATUS

摘要

An injection apparatus comprises a recessed injection gate (26) allowing cooling ducts (46) to be run proximate thereto and an extended nozzle (12) configured to extend to the recessed injection gate. The apparatus also comprises an insulating and sealing insert (30) positioned adjacent to the injection gate locating it between the nozzle and the injection cavity (16) during injection to thermally insulate the injection gate from the nozzle and to prevent melt material from leaking between the nozzle and the gate. The insert also accommodates variations in the nozzle sizes to assure a tight seal at each nozzle.