Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Compagnie Plastic Omnium

Michelin Recherche Et Techniques S.a.

Societe Detechnologie Michelin

Richard Herault

Antonio Delfino

Jean-Paul Meraldi

Denis Martin

Jean-Yves Demange

Jean-François Prat

The present invention provides a semi-product made of a prepreg, a three-dimensional preform and an overmolded part. More particularly, the present invention provides a semi-product made of a prepreg, including at least a first prepreg layer and a second prepreg layer, characterized in that a magnetic material layer is laid between the first prepreg layer and the second prepreg layer. Since the magnetic material layer is added between the prepreg layers, the produced semi-product, when being made into a three-dimensional preform and further into an overmolded part, can be well supported and positioned due to attraction to the magnetic material layer by the magnet on the die, and therefore be precisely shaped.

Semi-finished product manufactured from prepreg, three-dimensional preformed body and overmolded part

Non-pneumatic resilient wheel (), that is supported structurally and defines three perpendicular directions, circumferential (X), axial (Y) and radial (Z). The wheel comprises a hub (); an annular band referred to a shear band () comprising at least one inner circumferential membrane () and one outer circumferential membrane () that are oriented in the circumferential direction X; and a plurality of support elements () that connect the hub () to the inner circumferential membrane (). The two membranes () are connected to one another, in zones () referred to as anchoring zones, by means of a series (A,B,C), that extends in the circumferential direction (X), of cylinder structures () referred to as connecting cylindrical structures that are non-touching in the circumferential direction X. Each connecting cylindrical structure () comprises a plurality of elementary cylinders () having their generatrix oriented along the axial direction Y, said elementary cylinders being fitted one inside the other and interconnected to one another in each anchoring zone ().

Non-pneumatic resilient tire

A laminated product () that forms a deformable cellular structure, comprising: an upper band () and a lower band () both oriented in the same main direction (X); and between the two bands and connecting the latter in zones () referred to anchoring zones, a series (A,B,C) that extends in the direction X, of cylindrical structures () referred to connecting cylindrical structures that are non-touching in the direction X. Each connecting cylindrical structure () comprises a plurality of preferably concentric elementary cylinders () having their generatrix oriented along an axis Y perpendicular to the direction X, said elementary cylinders being fitted one inside the other and interconnected to one another in each anchoring zone (). Said elementary cylinders are especially composite cylinders comprising fibers embedded in a resin matrix. Such a laminated product can be used as an elastic beam having a high resistance to flexural/compressive stresses and having a high endurance to such repeated or alternated stresses, in particular as a shear band in a non-pneumatic resilient wheel.

Composite laminate product

Growing community of inventors

Genas, France

Richard Herault