Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool
Patent
1989-08-29
1991-01-01
Heitbrink, Timothy
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means to heat or cool
2642972, 2643288, 26432815, 425568, 425572, 425588, B29C 4520
Patent
active
049814311
ABSTRACT:
An injection molding system having at least one insulation gate seal extending outwardly to bridge an insulative air space between a heated nozzle and the adjacent cooled cavity plate. Each seal has a central bore therethrough to convey pressurized melt from the nozzle to the aligned gate. The outer end of each seal has a circular groove extending between a central portion and a surrounding flange portion. The flange portion is substantially larger in diameter than the gate and extends outwardly past the face of the central portion into sealing contact around the gate against the surrounding surface of the cavity plate. The combination of the clearance provided between the face of the central portion and the surrounding surface of the cavity plate and the distance between the gate and the surrounding flange portion limits the temperature of the cavity plate immediately around the gate, while still providing the necessary seal.
REFERENCES:
patent: 4043740 (1977-08-01), Gellert
patent: 4094447 (1978-06-01), Gellert
patent: 4344750 (1982-08-01), Gellert
patent: 4688622 (1987-08-01), Gellert
patent: 4768283 (1988-09-01), Gellert
patent: 4793795 (1988-12-01), Schmidt et al.
patent: 4854851 (1989-08-01), Gellert
Heitbrink Timothy
Mold-Masters Limited
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