Tire mold with bladder pressurization system

Details Tire mold with bladder pressurization system Tire mold with bladder pressurization system

1989-07-27

1991-05-28

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

138 44, 264326, 425 281, 425 30, 425 39, 425812, B29C 3504

Patent

active

050193180

ABSTRACT:
A system for curing a green tire made from elastomeric material includes a tire mold with a surface defining a cavity for shaping the tire. A plurality of vent passages communicate the cavity with the exterior of the tire mold. An inflatable bladder presses the tire against the surface defining the cavity for a predetermined time in response to fluid pressurization. A fluid pressure source pressurizes the bladder. A conduit communicates the fluid pressure source with the bladder. A restrictor member is located in the conduit for restricting the rate of increase of fluid pressure in the bladder to a predetermined rate of increase during the first one-third of the predetermined time. During the first one-third of the predetermined cure time, portions of the tire adjacent the plurality of vent passages cure and restrict the flow of other uncured portions of elastomeric material into the vent passages.

REFERENCES:
patent: 1162319 (1915-11-01), Southworth
patent: 1559061 (1925-10-01), Allen et al.
patent: 1586825 (1926-06-01), Meredith et al.
patent: 1938475 (1933-12-01), Alexander
patent: 2076465 (1937-04-01), Kirk
patent: 4436497 (1984-03-01), Dahl et al.
patent: 4674965 (1987-06-01), Hasegawa et al.
patent: 4773021 (1988-09-01), Harris et al.
patent: 4812281 (1989-03-01), Beard et al.

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