Tread ring venting and pressurization system

Details Tread ring venting and pressurization system Tread ring venting and pressurization system

1988-11-18

1990-01-23

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Reshaping, resizing or vulcanizing means for tire, tire...

Control means responsive to condition sensing means

425 17, 425 46, 425437, 425812, B29C 3502, B28B 712, B28B 1700

Patent

active

048955027

ABSTRACT:
Tire mold vents (34) in communication with a sealed cavity (35) are pressurized for limiting the quantity of rubber entering the vents (34) and for assisting the stripping of the vulcanized tire (28) from the mold. Passages (40) in the mold communicate fluid pressure to the vents (34) and pressure regulators (58,60) control the fluid pressure communicated to the vents (34) during vulcanization and during ejection of the tire (28) from the mold (10).

REFERENCES:
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patent: 2169146 (1939-08-01), Iverson
patent: 2230778 (1941-02-01), Flores
patent: 2581939 (1952-01-01), Deist et al.
patent: 2699198 (1955-01-01), Balzhiawe
patent: 3619444 (1971-11-01), Roth
patent: 3876356 (1975-04-01), Frazekas et al.
patent: 3931381 (1976-01-01), Lindberg
patent: 4021168 (1977-05-01), Dailey
patent: 4436497 (1984-03-01), Dahl et al.
patent: 4531902 (1985-07-01), Stuhldreber et al.
patent: 4662833 (1987-05-01), Carter

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