Plastic article or earthenware shaping or treating: apparatus – Reshaping – resizing or vulcanizing means for tire – tire... – Toroidal or annular female shaping means and coacting means...
Patent
1984-11-23
1986-03-04
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Reshaping, resizing or vulcanizing means for tire, tire...
Toroidal or annular female shaping means and coacting means...
425 39, 425405R, 425DIG60, B29H 502
Patent
active
045738947
ABSTRACT:
A method and apparatus whereby tire mold is closed to within approximately one inch of full closure with a green tire in place therein for molding, and the mold is then evacuated employing a vacuum conduit prior to full mold closure whereby air within the mold cavity is evacuated and the necessity for vent holes in the mold is eliminated. A mold for practice in the invention is free of vent holes in the thread, sidewall, and bead portions of the mold and includes, along the parting line, at least one vacuum conduit whereby the mold cavity may be evacuated to not more than 16932 Pa within not more than about 60 seconds employing a source of vacuum. Seals are provided radially outward of the vacuum conduit along the parting line, and, where necessary, adjacent any moveable bead ring associated with the tire mold. Seals are preferably of a type wherein a differential between pressures experienced by one seal surface and obverse seal surface cause a more effective sealing arrangement. Tires emerging from the mold in accordance with the processes of this invention are free of rubber projections associated with cured rubber entering into vent holes associated with ordinary tire molds.
REFERENCES:
patent: 1276411 (1918-08-01), Price
patent: 2772012 (1956-11-01), Crabtree
patent: 2779386 (1953-12-01), Waters
patent: 2841823 (1958-07-01), Van Hartesveldt
patent: 2876492 (1959-03-01), Frieder et al.
patent: 3520024 (1970-07-01), Caretta et al.
patent: 3842150 (1973-01-01), Carter
patent: 3854852 (1974-12-01), Carter
patent: 3983193 (1976-09-01), Wulker et al.
patent: 4185065 (1980-01-01), Knipp et al.
patent: 4224276 (1980-09-01), Gallizia
patent: 4347212 (1982-08-01), Carter
Bartley Donald R.
Blayne Jerome J.
Sidles James
Ban Woodrow W.
Flint, Jr. J. Howard
The B. F. Goodrich Company
LandOfFree
Apparatus for ventless tire molding does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for ventless tire molding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for ventless tire molding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1593276