| 摘要 |
An expansion nozzle (10) for conducting melt from a floating manifold(120) to a mold assembly comprises a bushing(12) having a bushing flange (13) and spigot (19) having a passage (14) therethrough joining a nozzle inlet and an outlet, a head (20) having a seating surface (24) and a bore (22) through the head slidably receiving the spigot so that the spigot is movable relative to the head over a range from abutting contact of opposing surfaces of the head and bushing flange to a limit of axial separation of the opposing surfaces, axial separation of opposing surfaces of the head and bushing flange being maintained throughout an operating temperature range. Springs (150) maintain sealing contact of a seating surface of the head with a mating surface of the mold assembly. Advantageously, a locating ring (199, 192) provides a reaction surface for the springs and supports the head to resist moments arising from axial misalignment of the expansion nozzle and mold assembly.
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