Injection mold with ultra sonic gating means

Details Injection mold with ultra sonic gating means Injection mold with ultra sonic gating means

1975-03-05

1977-04-12

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Sonic or supersonic wave energy

264 23, 425245R, 425DIG229, B29F 100

Patent

active

040172376

ABSTRACT:
A mold is provided with a pair of cavities interconnected by a runner to a common entry point. One of the cavities is gated whereby plastic may be injected into this cavity only by applying ultrasonic energy to the gate.

REFERENCES:
patent: 2770011 (1956-11-01), Kelly
patent: 3169589 (1965-02-01), Bodine, Jr.
patent: 3222776 (1965-12-01), Kawecki
patent: 3233012 (1966-02-01), Bodine, Jr.
patent: 3619424 (1971-11-01), Torigai
patent: 3806295 (1974-04-01), Gellert
patent: 3807921 (1974-04-01), Murgatroycl

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