Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool
Patent
1988-04-28
1989-06-06
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
425562, 425563, 425564, 425566, 425567, 425568, 425570, 425571, B29C 4522
Patent
active
048367664
ABSTRACT:
This invention relates to an injection molding system having an axially aligned forward and rearward heated nozzle mounted in tandem. The rearward nozzle is seated in a fixed position, while the forward nozzle reciprocates between a retracted open position and a forward closed position to provide valve gating. The forward nozzle has a rearwardly extending sleeve portion which projects into the rearward nozzle to connect the melt bores of the nozzles as the forward nozzle reciprocates. The forward nozzle has a heated nose portion with a tip which seats in the gate in the closed position. A pneumatically actuated piston bears against the rear end of the forward nozzle to drive it to the closed position. Injection melt pressure around the nose portion drives the forward nozzle back to the open position.
REFERENCES:
patent: 3758248 (1973-09-01), Drazick
patent: 4010903 (1977-03-01), Sakuri et al.
patent: 4125352 (1978-11-01), Gellert
patent: 4403405 (1983-09-01), Gellert
patent: 4406609 (1983-09-01), Gellert
patent: 4643664 (1987-02-01), Yoshida
Heitbrink Timothy W.
Woo Jay H.
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