Injection molding system having manifold with side mounted nozzl

Details Injection molding system having manifold with side mounted nozzl Injection molding system having manifold with side mounted nozzl

1987-03-09

1989-03-07

Hoag, Willard

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

425549, 425564, 425570, 425572, B29C 4522, B29C 4574

Patent

active

048101842

ABSTRACT:
This invention relates to an injection molding system having a number of nozzles conveying melt from an elongated manifold to a common cavity. In the preferred embodiment, each heated nozzle has a melt channel which is offset from a central valve pin bore for conveying the melt to the gate. The melt channel extends through a side portion of the nozzle which is bolted to the side surface of the manifold. The bolts provide a seal against leakage of the pressurized melt, while at the same time allow slight lateral movement between the manifold and the nozzle. This provides for thermal expansion of the manifold relative to the nozzle which is accurately located in a well in the core. The system is used for large cavities which require large flow volumes and avoids the difficulty of accurate machining of the large molds to provide sealing.

REFERENCES:
patent: 3843295 (1974-10-01), Greenberg et al.
patent: 4268240 (1981-05-01), Rees et al.
patent: 4312630 (1987-01-01), Travaglini
patent: 4378863 (1983-04-01), Schouenberg
patent: 4422841 (1983-12-01), Alfonsi et al.
patent: 4450999 (1984-05-01), Gellert
patent: 4468191 (1984-08-01), Gellert
patent: 4530654 (1985-07-01), Rose
patent: 4563149 (1986-01-01), Landis
patent: 4609138 (1986-09-01), Harrison
patent: 4662837 (1987-05-01), Anderson
patent: 4702689 (1987-10-01), Schmidt et al.

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