초록 ▼

A three piece nozzle assembly for injecting molten plastic in an injection molding machine carrying out a high pressure, high volume continuous molding process to mold thin walled parts. A nozzle housing has an internally threaded dual diameter bore in one end which receives in one bore portion an e

A three piece nozzle assembly for injecting molten plastic in an injection molding machine carrying out a high pressure, high volume continuous molding process to mold thin walled parts. A nozzle housing has an internally threaded dual diameter bore in one end which receives in one bore portion an externally threaded shank of a nozzle. A sleeve is threaded into the other bore portion and is tightened adjacent to a flange on the nozzle shank to lock the nozzle to the housing and prevent the pressure of the injection molding from working the nozzle loose from the housing. A gap is formed between the sleeve and nozzle shank to reduce the thermal effects.

대표청구항 ▼

1. A nozzle assembly for injecting molten plastic into a mold cavity, said nozzle assembly comprising:a nozzle housing presenting a passage therethrough for receiving the molten plastic, said passage having a configuration to present a shoulder therein; a nozzle having a detachable threaded connecti

1. A nozzle assembly for injecting molten plastic into a mold cavity, said nozzle assembly comprising:a nozzle housing presenting a passage therethrough for receiving the molten plastic, said passage having a configuration to present a shoulder therein; a nozzle having a detachable threaded connection with said housing and a passageway communicating with said passage when the nozzle is connected with the housing, said nozzle having a discharge opening for injecting the molten plastic into the mold cavity; a shank portion of said nozzle having an outer end portion and an inner end portion providing said detachable connection of said nozzle with said housing; an enlarged flange on said shank portion of said nozzle at a location between said inner and outer end portions and adjacent to said shoulder; internal threads on said nozzle housing extending at a location spaced outwardly from said nozzle when the nozzle is connected to the housing; and a sleeve having a threaded connection with said internal threads on the nozzle housing and being adapted to be tightened on said internal threads to a position adjacent said flange to lock the nozzle to said nozzle housing, said sleeve fitting on said nozzle in a manner to present a gap between said sleeve and said shank portion along a majority of the length of said outer end portion of said shank portion.