Injection mold having heated sprue bushing

Details Injection mold having heated sprue bushing Injection mold having heated sprue bushing

1997-03-26

1999-07-13

Pyon, Harold Y.

Plastic article or earthenware shaping or treating: apparatus

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

With means to heat or cool

425569, 425572, B29C 4574

Patent

active

059223677

ABSTRACT:
An injection mold machine (10) is disclosed including a mold (40) having closely spaced mold cavities (56, 58). A heated sprue bushing (62) is disposed between the mold cavities so that the runners (142, 144) are relatively short. The sprue bushing has an elongated portion (78) that is narrow and fits between the mold cavities (56, 58). Two rather slender cartridge heaters (126) are disposed in holes (112, 114) formed in the elongated portion on opposite sides of the sprue opening (102) through which the molten material is injected.

REFERENCES:
patent: 3935972 (1976-02-01), Tsunemoto et al
patent: 4273525 (1981-06-01), Reitan
patent: 4304544 (1981-12-01), Crandell
patent: 4653995 (1987-03-01), Ward
patent: 4892474 (1990-01-01), Gellert
patent: 4902218 (1990-02-01), Leonard et al.
patent: 5352109 (1994-10-01), Benenati
patent: 5484275 (1996-01-01), Kushnir
Catalog 3 pages; D-M-E; 1990.
Catalog pp. 3.2-3.5; Fast Heat Element.
Catalog 4 pages; Polyshot; Aug. 1991.

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