| 摘要 |
<p>An injection molding nozzle with a collar (60) having two segments (108,110) mounted around the rear end (52) of an elongated central body (62) having a hollow central core (84). A helical portion (80) of an electrical heating element (78) is cast in a copper alloy conductive portion (82) around the central core (84). The heating element (78) has a pair of lead portions (88,90) which extend outwardly through the collar (60) into a ceramic insulative connector (100). The lead portions (88,90) extend in stainless steel protective tubes (92) having inner ends (94) rigidly cast in the copper alloy conductive portion (82) over which the insulative connector (100) is mounted. <MATH></p> |
