Method of preheating and preforming a green tire

Details Method of preheating and preforming a green tire Method of preheating and preforming a green tire

1984-02-21

1985-06-25

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing toroidal work

264519, 264315, 264326, 425 31, 425 42, B29H 502, B29H 1726

Patent

active

045253200

ABSTRACT:
This disclosure relates to a method for preheating and preforming a green tire prior to final vulcanization of the tire. The method includes the steps of supporting the beads of a green tire between a pair of relatively cool discs to form a tightly closed space, moving the discs toward each other until the tire has a shape substantially the same as the final tire shape, supplying the space with a thermal medium, and heating the medium and the tire to a temperature substantially lower than that at which the vulcanization starts but high enough to preform the tire. A coolant is passed through the parts of the discs which engage the tire beads to prevent overheating of the beads.

REFERENCES:
patent: 3793420 (1974-02-01), Fredricks et al.
patent: 3903227 (1975-09-01), Sarumaru
patent: 3924981 (1975-12-01), Sarumaru

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