Sedepro

Michelin Recherche Et Technique S.a.

Manufacture Française Des Pneumatiques Michelin

Alain Soulalioux

Denis Marchadier

Jean-Pierre Ladouce

The tire mold comprises a laminated peripheral crown having a stack in the circumferential direction of a plurality of thin sheets. Cutouts distributed over several adjacent sheets increase the venting ability of the mold.

Tire mold

A rigid core at least partially defining a manufacturing form for the internal surface of a tire, the core including a plurality of circumferentially adjacent fractions disposed side by side in contact with one another by their transverse faces, the transverse faces of at least one fraction converging radially at the exterior of the core, each of the fractions including a portion for attachment to a rim, the attachment portion being arranged at the radially internal end of each of the fractions, the attachment portion being produced essentially from a first material, the core further including a main portion which is integrally connected to the attachment portion, is produced essentially from a second material different from the first material and is integrally connected to the attachment portion, the manufacturing form being essentially defined by said main portion.

Rigid core in two portions for the manufacture of tires

The sector mold (11) is designed so that, during the molding phase, the molding elements (10, 10a, 10b, 10c) are all equidistant due to devices (13) which assure an elastic repulsion between each other. Some of the elements glide circumferentially with respect to their sector (11) in the final closing phase. In this way, pinching of the rubber between sectors and the appearance of molding burrs are avoided.

Growing community of inventors

Saint-Beauzire, France

Alain Soulalioux