Vulcanizing mold for pneumatic tires

Details Vulcanizing mold for pneumatic tires Vulcanizing mold for pneumatic tires

2005-09-27

2005-09-27

Mackey, James P. (Department: 1722)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

C425S046000

Reexamination Certificate

active

06949213

ABSTRACT:
A vulcanizing mold for pneumatic tires includes upper and lower base plates, upper and lower sidewall mold members attached to the upper and lower base plates, respectively; and upper and lower tread mold members attached to the upper and lower base plates, respectively. The upper and lower tread mold members are constituted of upper segments and lower segments, respectively. The upper and lower segments can be radially expanded and contracted relative to the upper and lower sidewall mold members, respectively. In operation, the upper and lower sidewall mold members are displaced toward each other so that the upper and lower segments are brought into abutment with each other. Then, a single cam ring is operated to cause all of the segments to be simultaneously displaced radially inwards and relative to the upper and lower sidewall mold members, with the upper segments in abutment with the lower segments.

REFERENCES:
patent: 3553789 (1971-01-01), Allitt
patent: 3806288 (1974-04-01), Materick
patent: 3990823 (1976-11-01), Le Moullac
patent: 4289463 (1981-09-01), Le Moullac
patent: 5208044 (1993-05-01), Miyata et al.
patent: 6066283 (2000-05-01), Nara et al.
patent: 1 248 891 (1971-10-01), None
patent: 325190 (1971-03-01), None

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