| 摘要 |
<p>A heated injection molding nozzle (10) having a cylindrical locating flange (68) extending forwardly from a rear collar portion (52) to mount the nozzle in a well (66) in a cooled mold. The nozzle has a cylindrical central portion (54) with an insulative air space (74) extending between it and the surrounding cooled mold. A hollow thermocouple tube (18) extends through the rear collar portion (52) and along the inner surface of the locating flange (68) to removably receive a thermocouple element (20) which extends from the rear end of the nozzle and through the insulative air space (74) to monitor the operating temperature near the forward end of the nozzle. In the event of pressurized melt escaping to fill the air space (74), contact of the thermocouple tube (18) with the locating flange (68) cools the melt which flows into the thermocouple tube (18) sufficiently to freeze it and prevent leakage out amongst the wiring in other parts of the mold. <IMAGE></p> |
