Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Franck Denavit

Michael D Petrovich

Francis Aubarede

Patrice Monnereau

Stephane Ravat

Stéphane Ravat

Christophe Hombert

Florent Monbrun

Christian Beccavin

Michael Petrovich

Calendering installation for the production of a reinforcing ply () for a tire, which has a frame (), two extruders () for feeding elastomer material, a reinforcing-thread feeding device (), a calender () having a first pair of counter-rotating rollers, with a first working roller () and a first shaping roller (), and a second pair of counter-rotating rollers, with a second working roller () and a second shaping roller (), wherein a calendaring nip () is formed between the working rolls () in order to receive a first calendered rubber ply () delivered by the first pair of rollers (), a second calendered rubber ply () delivered by the second pair of rollers (), and the reinforcing threads () in order to supply the calendered reinforcing ply (), which is conveyed to the outlet of the installation via GUIDE ROLLERS (). According to the invention, the two extruders () are superposed and arranged on either side of a horizontal plane P extending at the level of the guide rollers ().

Calendering facility for reinforcement plies for tires

A system is provided for placement of noise attenuating foam along an inside surface of a tire to attenuate cavity noise. The system can be used with tires of various sizes and shapes such that different foam sizes may be utilized. The system provides for automating the process of foam placement in a manner that allows for consistent placement of the foam during e.g., tire manufacture.

System for placement of foam ring onto an interior tire surface

Method for manufacturing a green tire by winding a carcass reinforcement ply onto a tire-building drum on which a number of profiled elements are axially spaced apart one from one another and have a given thickness of which the meridian line has a curved profile are laid, wherein:

Method and device for manufacturing a green tire

A method for manufacturing a raw blank of a tyre includes using a calender to produce a ply. The calender includes two rollers with a gap situated therebetween. A ply that includes a first rubber material is formed in the gap of the calender, with a bead of the first rubber material being formed upstream of the gap. The bead and the gap of the calender are fed with a second rubber material, different from the first rubber material, to form at least one insert in the ply.

Method for manufacturing a tyre blank by means of a ply comprising two rubbers

Variable-diameter tire-building drum intended for the manufacture of a green tire having a generally cylindrical receiving surface formed of radially mobile sectors and bearing elements the radially external part of which constitutes the receiving surface, the receiving surface comprising at least one circular groove containing an elastic circumferential sleeve which is held radially away from the bottom of the groove by pushers able to move radially with respect to the mobile sectors so as to align the radially external surface of the sleeve with the receiving surface when the drum is brought to a first laying diameter, and which is pressed against the bottom of the groove under the effect of circumferential elastic tensions when the drum is placed at a laying diameter greater than the said first laying diameter. Disengageable locks are able to keep the pushers in the position in which the radially external surface of the sleeve is aligned with the receiving surface regardless of the diameter to which the said receiving surface is brought.

Growing community of inventors

Clermont-Ferrand, France

Franck Denavit