Heated nozzle manifolds in a common plane interconnected through

Details Heated nozzle manifolds in a common plane interconnected through Heated nozzle manifolds in a common plane interconnected through

1996-08-06

1998-01-13

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

With means to heat or cool

2642972, 2642978, 2643288, 26432814, 26432815, 425570, 425572, 425588, B29C 4522

Patent

active

057076642

ABSTRACT:
Injection molding apparatus with a central heated manifold, a pair of connector manifolds, and at least four nozzle manifolds mounted to extend in a common plane in a mold. A number of heated nozzles extend from each nozzle manifold. A melt passage branches in each nozzle manifold and the nozzle manifolds are made so thermal expansion slides the branches of the melt passage into exact alignment with central melt bores through the nozzles. The central manifold and the two connector manifolds extend along a central axis and each connector manifold is between each pair of nozzle manifolds which are offset from the central axis. Connector bushings slidably connect each connector manifold rearwardly to the central manifold and sidewardly to each nozzle manifold. The connector bushings slide sufficiently to provide sufficient compensation for thermal expansion and contraction to allow either the connector manifolds or the nozzle manifolds to be centrally located relative to the cooled mold, which reduces the distances the melt passage branches must slide to be in proper alignment.

REFERENCES:
patent: 4219323 (1980-08-01), Bright et al.
patent: 4761343 (1988-08-01), Gellert
patent: 5032078 (1991-07-01), Benenati

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