Assembly of injection molding manifold, nozzles and mold

Details Assembly of injection molding manifold, nozzles and mold Assembly of injection molding manifold, nozzles and mold

1991-07-16

1993-07-13

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

2643288, 26432814, 26432815, 425549, 425570, 425572, 425DIG58, B29C 4522

Patent

active

052271790

ABSTRACT:
A heated manifold, for use in the distribution of heated plastic resins to the various cavities of injection molds for thermoplastic materials. The parts of the manifold interlock with each other and contain the high pressures generated by the injection molding presses. The components of the manifold are fitted with seals of metals dissimilar to the manifold, and with a higher coefficient of expansion than the manifold material. The system includes heater bushings which channel the plastic materials to the individual cavities and are fitted with a removable tip which can be adjusted to change the overall length of the bushing. A duct structure provides passages for the heated plastic, and electrical heaters extend generally along the passages, secured in channels in the duct structure by heater covers; a snug assembly of the heaters in the channels provides excellent heat transfer, utilizing heater covers of a metal that is mechanically forced to flow into undercuts in the channels.

REFERENCES:
patent: 4219323 (1980-08-01), Bright et al.
patent: 5032078 (1991-07-01), Benenati
Mold Masters Catalog, Apr. 1986 p. 35.

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