Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Compagnie Générale Des Etablissements Michelin-Michelin & Cie

Gerard Crosnier

Arnaud Letocart

Christophe Ougier

Richard Abinal

Patrick Pallot

The present disclosure relates to devices for extruding plastics, notably mixtures of elastomers which are intended to be used in the manufacture of tires.

Device for extruding elastomer mixtures

The device for producing a tire component by winding, comprises:

Device for the production of tread of a tire casing

Method of manufacturing a tire comprising a tread strip in which blind radial cuts are arranged in the blocks of rubber that form the tread pattern, comprising a step during which the cuts () are made in the unvulcanized tread strip () intended to cap the green tire. One or more blades () are raised to a temperature higher than the vulcanization temperature of the material of which the tread strip () is made are caused to penetrate the radially internal face () of the tread strip () for a sufficient period of time that they superficially vulcanize the walls of the cut in contact with the blade () so as to prevent the faces from sticking back together once the blade has been withdrawn from the cut.

Method and device for making blind grooves in an unvulcanized tread

The invention relates to an extrusion head (3) for manufacturing a product ade of a rubber compound, provided with an inlet passage (41) for said rubber compound to pass into an accumulation chamber emerging in an extrusion orifice (6) through which said rubber compound is forced and which includes a wall (8) acting cooperatively with a rotating roller (7) in order to define the profile of the product, the extrusion head (3) comprising a coating device (15) which puts a material based on a rubber compound into the accumulation chamber (4) directly between the inlet passage (41) and the extrusion orifice (6) and distributes it on the surface of the roller (7) in order to superpose, from above, the product issuing from the inlet passage (41). The 'coating' material may consist of the strands of flash coming from deflashing the edges of the extruded product, the coating device therefore constituting a flash recycling device. The invention also relates to a device (15) for coating by superposition, intended to be mounted on an extrusion head (3) which includes a rotating roller (7).

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Clermont-Ferrand, France

Gerard Crosnier