Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work – To degas or prevent gas entrapment
Patent
1989-08-23
1990-09-18
Hoag, Willard
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
To degas or prevent gas entrapment
264335, 425 44, 425 58, 425437, 4254051, B29C 3346
Patent
active
049576763
ABSTRACT:
Detaching a cured tire from mold sections of a tire mold during opening of the mold by communicating air under pressure into the space between the mold sections and confining the air in this space with a sleeve member supported on the upper mold section and slidably urged into sealing engagement with the lower mold section. Air under pressure is then communicated from the space between the mold sections to the spaces between the cured tire surface and the molding surfaces of the upper and lower mold sections to detach the tire. Sealing rings on the sleeve and on the upper mold section prevent leakage of the air under pressure from the space between the mold section. Spring means between the upper mold section and the sleeve member provide extension of the sleeve member into sealing engagement with the lower mold section.
REFERENCES:
patent: 2169146 (1939-08-01), Iverson
patent: 2929105 (1960-03-01), Starck et al.
patent: 3842150 (1974-10-01), Carter
patent: 4257994 (1981-03-01), Leblanc et al.
patent: 4347212 (1982-08-01), Carter
patent: 4521367 (1985-06-01), Underwood
patent: 4573894 (1986-03-01), Blayne et al.
patent: 4595553 (1986-06-01), Blayne et al.
English Abstract Only Supplied By Applicant.
Hoag Willard
Lacher Frederick K.
Lewandowski T. P.
The Goodyear Tire & Rubber Company
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