Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1981-06-30
1983-09-20
Cockeram, H. S.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264326, 264327, 425 28B, 425 34B, 425 35, 425 40, B29H 518, B29H 500, B29D 2900, B29D 722
Patent
active
044055552
ABSTRACT:
A process is provided for vulcanizing a vulcanizable endless belt which is substantially V-shaped in cross-section, substantially uniformly, by heating the belt through its minor base and converging sides and then cooling the belt from its minor base and converging sides more rapidly than cooling of the major base. An apparatus for practicing the process has a drum and a substantially concentric jacket in spaced relation about the drum. An annular inflatable diaphram is disposed in the space between the drum and jacket. A belt to be vulcanized is placed in an annular groove in the drum, the diaphram is inflated to press the belt in the groove against the surfaces thereof. The surfaces of the groove facing the minor base and the converging sides are heated while the major base is flush with the surface of the drum and is not heated. Cooling water is run through conduits adjacent the minor base and converging sides of the belt to accelerate cooling of the belt while the major base is cooled only by exposure to air.
REFERENCES:
patent: 2599046 (1952-06-01), Brucker
patent: 2600775 (1952-06-01), Hurry et al.
patent: 2647280 (1953-08-01), Leguillon
Egidi Paolo
Franchino Fulvio
Cockeram H. S.
Industrie Pirelli S.p.A.
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