Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissments Michelin

Societe Detechnologie Michelin

Christophe Ougier

Arnaud Letocart

Gerard Crosnier

Henri Hinc

Patrice Monnereau

Miguel Torres-Castellano

Jean-Claude Delorme

Nicolas Jaunet

Gérard Crosnier

Nicolas Chevaux

Thomas Mosnier

Fabien Vignon

Christian Monge

The installation is for producing a coextruded profiled element for tires that is made from rubber compounds of different compositions. The installation includes at least one first extruder having a screw with a longitudinal axis and at least one second extruder having a screw with a different longitudinal axis. An extrusion head is connected to each of the extruders by appropriate ducts. The feed inlet of each extruder is connected to the delivery orifice of a gear pump.

Installation and method for coextrusion

A separation device () intended to separate a profiled element () from a conveying surface () which conveys the profiled element () in a longitudinal direction (L) comprises a detachment roller () which is mounted so as to be able to rotate on a support () about a detachment axis (X), and which is intended to be interposed, in an engagement configuration (C), between the profiled element () and the conveying surface () to cause the profiled element () to become detached from the conveying surface ().

Separation device for removing a profiled element from a conveying surface, and extrusion machine provided with such a separation device

The machine includes an extrusion head having flow ducts, the inlet orifices of which are connected to the outlets of at least two extruders for supplying extruded strips made of elastomeric compounds. The outlet orifices lead into a die which is adjacent to a roller and is designed to cooperate with the latter to shape the profiled element strip. The roller has a central axis surrounded by an external surface intended to receive the profiled element strip and a means for driving the roller in rotation about its central axis. The flow ducts are mutually parallel and are perpendicular to the circumferential direction of the roller, and the profiled element strip is joined to the receiving surface of the roller along an equivalent length of at least 700 mm.

Coextrusion machine for elastomeric compounds, and method for manufacturing a profiled element strip

The facility for manufacturing a profile strip made from several elastomer mixtures with different compositions by coextrusion includes at least two extruders which feed elastomer mixtures to an extrusion head. The extruders discharge directly into the extrusion head, which is interchangeable and groups together all of the dimensional tooling.

Extrusion facility comprising an improved extrusion head

An installation for producing a profiled band based on several mixtures of elastomers of a different composition by means of coextrusion. The installation includes at least two extruders for supplying a mixture of elastomers to an extrusion head. The extrusion head comprises an assembly of at least two plates which are arranged side by side. Each plate having at least one cavity which enables the mixture from an extruder to be chaneled towards an outlet hole. The plates are arranged substantially transversely relative to the output direction of the mixture flows of the extruders in order to produce a discharge at approximately 90&#xb0; of the mixture flow at the outlet of the screw of each extruder.

Extrusion equipment comprising an improved extrusion head

An extrusion apparatus intended for the manufacture of a coextruded profiled element P for tyres, produced from rubber compounds of various compositions, comprises a profiling device () arranged at the outlet of at least two flow channels () for rubbery compounds of different composition. The said channels receive the compounds from positive-displacement contrarotating twin-screw extruders (), the screw flights interpenetrating and having conjugated profiles.

Apparatus and method for extruding rubber mixtures

A screw having a longitudinal body and, around this longitudinal body, at least one flight extending in the shape of a helix, the flight including, over part of its length, internal partitioning delimiting a plurality of internal channels that extend in the shape of helices following the helix shape of the flight. The screw includes manifold-like cavities into which the ends of the interior canals open, the manifold-like cavities extending radially and opened into a longitudinal bore of the body at longitudinally spaced locations. This screw can be produced by additive manufacturing using laser-induced fusion.

Material conveying screw and method for producing same

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

The positive-displacement pump () includes a pump body () delimiting a rubber pressurizing chamber (), and a feeder () for feeding the chamber () with rubber. The feeder () includes a worm () able to rotate about a main axis (X) with respect to the pump body () and an absorption body () that absorbs pressure in the pressurizing chamber () and is axially secured to the worm (). The absorption body () is distinct from the worm (), and has a surface () delimiting the pressurizing chamber () and arranged axially in line with the worm ().

Positive-displacement pump including a pressure absorber

Device for applying a strip (B) of a viscoelastic material to a receiving surface (S) in relative motion (R) relative to said device, comprising a feed means and an application nozzle () having a body (), into which said feed means () emerges, and a head () at the end of which there is an outlet orifice () of elongate shape in the transverse direction to the direction of the relative motion when the device is operating. The head () of the application nozzle () is linked to the body () of the application nozzle () via an articulation () which can be deformed along an axis (AA') perpendicular to the direction of application of the strip (B).

Articulated nozzle

A device for extruding a strip of rubber comprises a passage for forming the strip, which passage is defined by a rotary roller for forming and driving the strip. The device also comprises a shutter for shutting the forming passage, which shutter is deactivatable under the effect of the pressure of the rubber upstream from the shutter exceeding a predetermined threshold.

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Clermont-Ferrand, France

Christophe Ougier