Method for forming a tire

Details Method for forming a tire Method for forming a tire

1980-08-26

1982-08-31

Flint, Jr., J. Howard

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

425 43, 425812, B29H 502

Patent

active

043472125

ABSTRACT:
Separable mold sections of a tire forming machine are brought together to form a tire cavity within which a preformed tire band is expandable against the inner surface of the cavity side wall. During the tire shaping operation, air is forced by the expanding tire band from the cavity and into the atmosphere, through valve controlled air passages having terminal ends open to the cavity side wall. As the expanding tire band moves into conforming engagement with the inner surface of the cavity side wall, the final residual air in the cavity is forced therefrom concurrently with valves at the passage terminal ends being engaged and moved by the expanding tire band to passage closing positions wherein the valves form a smooth surface continuous with the inner surface of the tire cavity.

REFERENCES:
patent: 2904830 (1959-09-01), Mulrooney
patent: 3377662 (1968-04-01), Fukushima
patent: 3804566 (1974-04-01), Kimura et al.
patent: 3842150 (1974-10-01), Carter
patent: 4021168 (1977-05-01), Dailey

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