Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissements Michelin

Societe Detechnologie Michelin

Pascal Martin

Dominique Cordaillat

Michel Druet

Nicolas Jaunet

Antoine Filiol

Gérard Buvat

Jean-Louis Souche

Jacques Lauper

Jean-François Verjat

Christian Bernard

A device for manufacturing a reinforcing ply N by assembling lengths of strip cut at an angle, comprising: a feed means () for delivering a strip (B), an assembly belt (), a transfer means () for conveying onto the assembly belt a given length of straight-grain strip in a direction (AA') comprising a retaining wall (), parallel to the planes of the assembly belt () and of the feed means, and a first face () of which is intended to come into contact with the surface of the strip, in which device the feed means (), the transfer means () and the assembly belt () are fitted with magnetic means. The retaining wall () is able to move up and down and back and forth, and the magnetic means are adjusted so that when the device is in operation: in the lowered position, the said magnetic means of the transfer means () exert on the metallic threads of the strip a magnetic field of a strength higher than the strength of the magnetic field exerted by the magnetic means () positioned on the feed means (), in the raised position, the said magnetic means of the transfer means () exert a magnetic field of a strength weaker than the strength of the magnetic field exerted by the magnetic means positioned on the assembly belt ().

Device for transferring and aligning strips intended to be assembled to form a ply

Device for manufacturing a reinforcement from a thread laid directly in its final place by casting lengths of the said thread onto a receiving surface, the said device comprising a feed means () for feeding the thread () from a source of thread (), a rotary assembly comprising a rotary guide () of axis rr' fixed to a hollow shaft () constituting the axis of rotation (RR&#x2032;) of the said guide () so that the outer radial end () of the said guide () is directed substantially radially with respect to the axis of rotation of the hollow shaft (RR&#x2032;), the said guide receiving the thread () that comes from the said feed means via its central end () that is the opposite end to the said outer radial end (), the said thread leaving via the said outer radial end (), the said feed means controlling the linear speed at which the thread advances inside the said rotary guide (), means () for rotating the hollow shaft, and means () for cutting the thread, acting on the thread in such a way as to part off one length for each revolution of the said rotary guide (). The said feed means comprises a motorized pulley (), borne by the hollow shaft, the circumference of which is tangential to the axis (rr&#x2032;) of the rotary guide (), and about which pulley the thread is wound before it directly enters the inlet () of the rotary guide () when the device is in operation.

Rotary laying arm comprising an on-board thread feed means

An apparatus for manufacturing a reinforcement from a thread laid down directly in its final location by projecting lengths of the thread onto a receiving surface (S). The apparatus has feed means for feeding thread from a source of thread, a rotary conduit () receiving the thread, thread-cutting device has a roller fixed with respect to the thread, and a moving cutter acting on the thread in collaboration with said roller so as, for each revolution of the rotary conduit, to release a length having a free end at the cutting means end. The apparatus also has a buffer positioned in the path of the free end so that, during the operation, the free end strikes the buffer before coming into contact with the receiving surface (S).

Device and method for guiding a thread

A method for determining the operating parameters of a device for manufacturing a reinforcement from a thread () laid directly in its final position by projecting lengths of thread () onto a receiving surface (S). The device includes an assembly comprising a rotary conduit () of given length B and of longitudinal axis bb' fixed to a shaft () of axis R constituting the axis of rotation of the conduit, so that the outer radial end of the conduit is directed substantially radially with respect to the axis of rotation, the conduit receiving the thread () via its central end, which is the opposite end to the outer radial end, from the feed means, the thread leaving via the outer radial end, feed means for feeding thread () from a source of thread, the feed means controlling the linear rate of advance of the thread inside the rotary conduit, means for rotating the conduit at a speed &#x3a9; about the axis R, the conduit running in a plane of rotation P forming an angle &#x3b8; with the longitudinal direction of the receiving surface, and thread cutting means (), wherein the angle &#x3b2;formed by the conduit and a direction of the plane P at the time that the length of thread is cut is determined in such a way that the initial contact between the length of thread and the receiving surface S is one third of the way from the rear of the length.

Method for determining the operating parameters of a device for laying a thread by projection

Device for manufacturing a reinforcement from a thread laid directly in its final position by spraying lengths of the thread onto a receiving surface. The thread lengths are delivered from a conduit to a guide as the conduit rotates about an axis. The guide includes deflectors forming therebetween a slot having a thread inlet orifice and a thread spray (discharge) orifice spaced apart along the guide's height. The separation between the deflectors narrows toward the spray orifice, wherein the deflectors form therebetween an angle in the range of 3&#xb0; and 7&#xb0; when measured at any point along the height of the slot.

Guide for guiding reinforcement threads sprayed onto a surface during manufacture of a tire

The manufacturing device comprises a rotary distributorin rotation about a rotation axis R, the rotary distributor comprising at least one elbowed tube, the elbowed tube having a corridor for receiving the wire on the radially internal side and forming output guidance on the externally radial side. The device comprises a member for conveying to the distributor comprising a tubular portionsubstantially perpendicular to the rotation axis R, a space in the radial direction being provided between the tubular portionand the elbowed tube. A knifeis disposed in the space between the rotary distributor and the conveying member. The conveying member and the distributor are coupled and both rotary, the knifebeing mounted on a knife holderfor purposes of adjustment and whose rotation is locked during cutting. The rotary distributor comprises a central tube, and inlet orificeof which is disposed substantially on the rotation axis R of the rotary distributor, the tubular portioncoming in line with the central tube

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Corent, France

Pascal Martin