Tire tread forming mold body

Details Tire tread forming mold body Tire tread forming mold body

1979-01-29

1980-01-01

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

Mold having movable core or movable pin

425 35, 425 39, 425 49, 425 28R, 425289, 425554, 425556, 425572, 425573, 425588, 425437, 425812, B29H 502, B29C 700, B29F 100, B29G 300

Patent

active

041814886

ABSTRACT:
A body having rubber material thereon is positioned on a lower member, and an upper member is moved toward the lower member, such relative movement causing tread-forming shoes to move to inward positions to form a tread on the rubber material. As an alternative, the upper and lower members may be brought together, and rubber material may be injected into position to have a tread formed thereon. Upon movement of the upper and lower member relatively apart, the rubber material is made to remain in contact with the shoes, and the body is removed, whereupon an annular core having rubber material thereon is disposed on the lower member, and the upper and lower members are again brought together to deposit the rubber material in contact with the shoes onto the rubber material on the core.

REFERENCES:
patent: 2672914 (1954-03-01), Weigold et al.
patent: 2904830 (1959-09-01), Mulrooney
patent: 3145423 (1964-08-01), Horvereid
patent: 3183292 (1965-05-01), Dvorocek
patent: 3183551 (1965-05-01), Johnson
patent: 3660002 (1972-05-01), Morroni
patent: 3778203 (1973-12-01), MacMillan
patent: 3854852 (1974-12-01), Carter
patent: 3868203 (1975-02-01), Turk
patent: 4013390 (1977-03-01), Moeller
patent: 4022554 (1977-05-01), MacMillan
patent: 4025250 (1977-05-01), MacMillan
patent: 4059375 (1977-11-01), Koch et al.

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