Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means between charger and mold to cut off flow of...
Patent
1989-10-30
1991-04-02
Heitbrink, Timothy
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means between charger and mold to cut off flow of...
251229, 2643289, 475566, 475568, B29C 4523
Patent
active
050044168
ABSTRACT:
Injection nozzle for use in a device for moulding an article made of a thermoplastic material in an injection mould, has a nozzle with at least one feed channel which runs through it, and which at one end is connected to a feed of the thermoplastic material and at the other end connects to an outflow aperture, and at this end has a seat which can mate with the shut-off end of a to and fro moveable shut-off pin running through the channel. A mechanism for moving the pin is in the form of a ring provided with internal screw thread which engages at least one element which projects essentially radially relative to the pin, and which is situated in the feed channel and permits the passage of the material through the channel, and the end of which engages with the internal screw thread of the ring, the element being located between the connection of the channel to the material feed and the outflow aperture, and the end faces of the ring being in sealing contact with sealing faces provided in the nozzle.
REFERENCES:
patent: 3553788 (1971-01-01), Putkowski
patent: 3912133 (1975-10-01), Hehl
patent: 4010903 (1977-03-01), Sakuri et al.
patent: 4330258 (1982-05-01), Gellert
patent: 4394117 (1983-07-01), Taylor
patent: 4787840 (1988-11-01), Gellert
"Plastics Mold Engineering Handbook", pp. 123,124.
Eurotool B.V.
Heitbrink Timothy
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