Wheel for supporting tires for vehicles
A wheel for supporting tires for vehicles which is made of composite material based on carbon fiber, which includes an insert which is made of metallic material at its central region configured to be fixed to the hub of the respective vehicle. The insert is coupled between external contoured laminated shells made of composite material, with the interposition of at least one interface film having a thickness that can vary between 0.05 mm and 1.0 mm. The interface film is made of a material preferably chosen from among epoxy polymers, polyurethane polymers, acrylic polymers, silicone polymers, polyamide polymers, glass fibers, and combinations thereof.
1. A wheel for supporting tires for vehicles which is made of composite material based on carbon fiber, the wheel comprises: an insert made of metallic material at a central region configured to be fixed to a hub of the vehicle, said insert being coupled between external contoured laminated shells made of composite material, with the interposition of at least one interface film having a thickness configured to vary between 0.05 mm and 1.0 mm, said interface film being made of a material chosen from among epoxy polymers, polyurethane polymers, acrylic polymers, silicone polymers, polyamide polymers, glass fibers, and combinations thereof, wherein said interface film covers said insert completely, defining a protective layer against oxidative, galvanic, and chemical corrosion.
2. The wheel according to claim 1 , wherein said insert is made of aluminum alloy with high mechanical strength.
3. The wheel according to claim 2 , wherein said insert comprises at least one substantially radial tab which is at least partially tapered, said tab being accommodated within a respective spoke.
4. The wheel according to claim 3 , further comprising, within each spoke, a body made of highly deformable polymeric material at a peripheral region of each spoke and said substantially radial tab of said insert at a central region of each spoke, the terminal end of said tab of said insert being aligned with and proximate to the center of said body made of highly deformable polymeric material.
5. The wheel according to claim 1 , wherein said interface film, above a predefined threshold temperature, softens, responding to stresses with elastic deformations.
6. The wheel according to claim 5 , wherein said predefined threshold temperature is the glass transition temperature Tg′ of the polymer that constitutes said interface film, said glass transition temperature Tg′ being lower than the glass transition temperature Tg″ of the polymeric matrix of the composite based on carbon fiber that constitutes said wheel.