Industrie Pirelli S.p.a.

Fulvio Franchino

Paolo Egidi

Flavio Maffeis

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.

Process and device for vulcanizing power transmission belts

An apparatus for heating segments of an endless belt made from a heat cross-linkable elastomer has a frame comprising a flat rectangularly shaped base member and a generally 'C-shaped' heated enclosure supported above the base member. The C-shaped enclosure has a second base member and a top member disposed in vertically spaced relation with an upstanding side member supporting the top member above the second base member. Facing heated plates are supported by the second base member and the top member and can be moved together. A box-like housing has a pair of longitudinally spaced grooved cylindrically shaped members to support a looped belt to be cured. The box-like housing is mounted on wheels supported on rails on its first base member for moving a belt supported thereon into the enclosure with the upper reach of the belt between the heated plates for cross-linking. The belt while supported on the cylindrically shaped members is shielded from heat when disposed outside of the box-like housing.

Growing community of inventors

Milan, Italy

Fulvio Franchino