Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Feed control of material en route to shaping area
Patent
1993-09-13
1995-04-18
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Feed control of material en route to shaping area
4254501, 4254519, 425589, 425590, 425595, B29C 4577
Patent
active
054073421
ABSTRACT:
An apparatus for injection molding plastics material has an injection unit for delivering a plasticized melt through a nozzle, a press unit for urging a mold together at a predetermined pressure, a mold mounted in the press unit and a programmable controller operably connected to the injection unit and the press unit for automatically controlling the operation of the apparatus for repetitively producing uniform articles. The mold has a stationary mold section and a moveable mold section. The press unit is adapted for reciprocating the moveable mold section between an open position and a closed position. The stationary mold section has a plurality of ports at pre-selected points. Each port has a controllable gate for selectively opening and closing the ports for passing melt to a mold cavity until the melt fully occupies the mold cavity while controlling and minimizing melt lines formed when a flow of melt from one of the ports meets with a flow of melt from another of the ports.
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Camac, Cincinnati Milacron Mar. 1984.
Boucher Paul Y.
Ford John R.
Koscic David J.
Fors Arne I.
Heitbrink Tim
Horne D. Doak
Imai Jeffrey T.
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