Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Producing toroidal work
Patent
1990-07-27
1992-10-06
Knable, Geoffrey L.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Producing toroidal work
264102, 425 281, 425812, B29C 3310
Patent
active
051529513
ABSTRACT:
In a tire mold having a pair of mold parts separable about cooperating surfaces of the respective mold parts which define a parting line region, each of the mold parts includes a surface defining at least a portion of a cavity for shaping a tire. The tire mold further includes a plurality of pockets for defining a respective plurality of circumferentially arranged tread elements in the tire. The improvement comprises a vacuum source in fluid communication with the cavity of the tire mold for evacuating fluid from the cavity in the tire mold through a space located between the surfaces of the mold parts which define the parting line region. A vent fluidly connects a pair of adjacent pockets. A passage associated with one of the mold parts provides fluid communication between the vacuum source and one of the pair of adjacent pockets connected by the vent.
REFERENCES:
patent: 1880430 (1932-10-01), Furnas
patent: 4447197 (1984-05-01), Bartley et al.
patent: 4573894 (1986-03-01), Blayne et al.
patent: 4662833 (1987-05-01), Carter
patent: 4812281 (1989-03-01), Beard et al.
patent: 4881881 (1989-11-01), Rockarts et al.
Ahmad Shamim
Bartley Donald R.
Czarnecki John P.
Csontos Alan A.
Knable Geoffrey L.
Strugalski Greg
The Uniroyal Goodrich Tire Company
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