| 摘要 |
<p>A seating and sealing insert (10) for mounting a heated injection molding nozzle (12) in a well (14) in a mold (16). The hollow insert (10) has a cylindrical central portion (86) extending between a rear seating portion (88) and a forward sealing portion (90). The rear seating portion (88) is outwardly flanged to seat in the well (14) in the mold and forms an inner seat (104) to receive a cylindrical support flange (42) of the nozzle to accurately support the nozzle in the well (14) in the mold. The forward sealing portion (90) has a V - shaped forward face (106) and inner and outer surfaces (108,110) which are forced outwardly by melt pressure to seal against the nozzle (12) and the mold (16). Thus, the seating and sealing insert (10) provides an insulative air space (82) between the heated nozzle and the surrounding mold and the forward sealing portion (90) prevents the escape of pressurized melt into the insulative air space (82). <IMAGE></p> |
