Plastic and nonmetallic article shaping or treating: processes – Recycling of reclaimed or purified process material – Of gaseous process material
Patent
1981-10-16
1983-01-25
Flint, Jr., J. Howard
Plastic and nonmetallic article shaping or treating: processes
Recycling of reclaimed or purified process material
Of gaseous process material
264 85, 264315, 264326, 425 29, 425 33, 425 58, B29H 502
Patent
active
043702830
ABSTRACT:
An improved process for vulcanization of elastomer products which includes the steps of heating under pressure, the elastomer product mounted in a metal mold by supplying vulcanizing medium, suspending the supply of the vulcanizing medium when the elastomer product has reached a predetermined temperature or passed through a predetermined time period, subsequently supplying inert gas preliminarily extracted from atmospheric air and maintained at least under approximately the same pressure as that of the vulcanizing medium, up to the termination of the heating step so as to maintain the elastomer product at the predetermined temperature, and, upon termination of said heating step, restoring a mixture of the inert gas and the vulcanizing medium so as to derive the inert gas through steam separation for re-utilization of the inert gas for a preshaping of the elastomer product prior to the vulcanization of the elastomer product and the like.
REFERENCES:
patent: 1200603 (1916-10-01), Gammeter
patent: 3443280 (1969-05-01), Hagger
patent: 4097565 (1978-06-01), Cole et al.
patent: 4126657 (1978-11-01), Gado
Arimatsu Toshio
Sakon Tohatirou
Flint, Jr. J. Howard
Sumitomo Rubber Industries Ltd.
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