Injection molding apparatus

Details Injection molding apparatus Injection molding apparatus

1993-03-08

1994-10-04

Nguyen, Khanh

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For extrusion or injection type shaping means

249 78, 249 79, 249111, 425190, 425549, B29C 4520, B29C 4574

Patent

active

053521099

ABSTRACT:
A heated manifold system for use in the distribution of heated plastic resins to the various cavities of injection molds for thermoplastic materials. The manifold main structure consists of modular components of similar cross-section that are nested into each other by employing similar slots cut out at the points of intersection of components. The thermoplastic resin passages are bored longitudinally in each modular components, and transverse bores at each intersection provide resin passages between the longitudinal bores. The system includes heated nozzles which have slots to receive cartridge heaters and heater covers, also spring clips to retain the covers and heaters, which can rotate around the shank of the nozzle to allow easy replacement of the cartridge heaters in the event of failure. Internal sealed liquid-filled channels or highly conductive metal rods are used to equalize the temperature of the nozzle from one extremity to the other.

REFERENCES:
patent: 4304544 (1981-12-01), Crandell
patent: 4635851 (1987-01-01), Zecman
patent: 4636160 (1987-01-01), Nagasaka
patent: 4810184 (1989-03-01), Gellert et al.
patent: 4892474 (1990-01-01), Gellert
patent: 5032078 (1991-07-01), Benenatti
patent: 5136141 (1992-08-01), Trakas
patent: 5220154 (1993-06-01), Gunther
patent: 5226596 (1993-07-01), Okamura

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