Multiple hot runner injection bush

Details Multiple hot runner injection bush Multiple hot runner injection bush

1983-08-03

1985-01-08

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

With means to heat or cool

2643288, 2643289, 26432815, 425549, 425568, 425588, B29F 108

Patent

active

044925557

ABSTRACT:
A multiple hot runner injection bush for lateral tunnel gating, with a foot and a shaft heated by a heating element and a central hot sprue arranged therein, furthermore, with a heated nozzle head which contains radially extending injection channels. The technical problem of the invention is seen in the exact heat control and adjustment of the nozzle head if a plurality of mould nests is gated. The nozzle head is provided as a plate-like head and projects beyond the diameter of the shaft by a multiple distance of the diameter of the shaft (two times through five times). The nozzle head incorporates, at least, four radially extending injection channels. The nozzle head comprises a plane ring face, adjacent to the shaft, and an outer covering apron. A copper ring is attached on the ring face. The copper ring carries a spirally arranged high capacity coil heater.

REFERENCES:
patent: 4094447 (1978-06-01), Gellert
patent: 4184836 (1980-01-01), Rees
patent: 4212624 (1980-07-01), Ando et al.
patent: 4268241 (1981-05-01), Rees et al.
patent: 4345892 (1982-08-01), Schulte et al.

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