Process for molding and vulcanizing tires and other rubber artic

Details Process for molding and vulcanizing tires and other rubber artic Process for molding and vulcanizing tires and other rubber artic

1988-05-03

1989-09-05

Lorin, Hubert

Plastic and nonmetallic article shaping or treating: processes

With step of cleaning, polishing, or preconditioning...

106 3822, 264315, 264338, 427133, 427299, 427379, 427387, 4273931, 4274071, B29C 3364, B29D 3000

Patent

active

048636509

ABSTRACT:
Process for molding and vulcanizing tires and other rubber articles, in which in a press with the aid of a bladder negative shapes are pressed into the tire blank under high pressure and vulcanization is performed, the surface of the bladder having applied thereon a solvent which swells the surface, the swollen bladder being provided with a cross-linked, hardened, tightly adhering, elastic release agent film bonded to the bladder by chemical interactions before carrying out molding and vulcanization to prevent sticking of the molded and vulcanized tire to the bladder, the film comprising more than one thin coating each of which is produced by coating the bladder with an organic solvent solution comprising a mixture of a silicon release agent and a moisture or heat curable silicone rubber and curing the coated mixture through exposure to moisture or heat, and conducting at least 300 molding and vulcanizing cycles without recoating the bladder with the release agent film.

REFERENCES:
patent: 3328482 (1967-06-01), Northrup et al.
patent: 3525783 (1970-08-01), Prikell, III
patent: 3532624 (1970-10-01), Cekada
patent: 3549744 (1970-12-01), Compton
patent: 3713851 (1973-01-01), Cekada, Jr.
patent: 3905823 (1975-09-01), Piskoti
patent: 4244912 (1981-01-01), Battice
patent: 4311737 (1982-01-01), Ishizaka et al.
patent: 4359340 (1982-11-01), Comper et al.
patent: 4431452 (1984-02-01), Comper et al.
patent: 4547544 (1985-10-01), Allardice

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