Method of making polyester cord radial tires

Details Method of making polyester cord radial tires Method of making polyester cord radial tires

1980-08-13

1983-12-13

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing toroidal work

B29C 2500

Patent

active

044204531

ABSTRACT:
Tires made using polyester cord in the fabric plies are built in a conventional manner, cured in a conventional manner in a curing press, removed from the curing press and held in an uninflated state for a length of time sufficient for the tire to cool to 300.degree. F. (149.degree. C.), then post inflated. The tires remain in the inflated state until the temperature has been reduced below 90.degree. C. The cords in the tires which have been subjected to the post inflation treatment of the present invention have less tendency for sidewall waviness than tire which have been post inflated out of the mold immediately after curing and without being subjected to cooling water in the bladder. Also the cooling period outside the mold has been found to be as successful in solving the sidewall waviness problem as the injection of cooling water into the bladder for 2 minutes at the end of the cure cycle.

REFERENCES:
patent: 3039839 (1962-06-01), Waters et al.
patent: 3120571 (1964-02-01), Wolfer
patent: 3529048 (1970-09-01), Kovac et al.
patent: 3632701 (1972-01-01), Devitt et al.
patent: 3792145 (1974-02-01), Hagger et al.
patent: 3956443 (1976-05-01), Schichman

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