Patent ID: 11919265
Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A method for manufacturing an aluminum mold segment for curing and vulcanizing a tire, the method comprising:
(a) fixing at least one thin blade for formation of grooves in a tread of the tire in a mold form made of friable material, a shape of which is a negative of the mold segment that is to be obtained, such that an exterior part of the at least one thin blade is embedded in the material of the mold form and an interior part of the at least one thin blade projects from the mold form, the at least one thin blade being made from maraging steel and having been obtained by a selective laser melting method;
(b) closing the mold form and pouring or injecting aluminum into the mold form, coating the interior part of the at least one thin blade to fix it in place; and
(c) breaking the mold form to obtain the mold segment from a bottom of which the exterior part of the at least one thin blade projects,
wherein the at least one thin blade is subjected to a peening treatment including blasting it with shot particles made from a material with a Vickers hardness between 340 and 500 HV and with dimensions smaller than 0.3 mm.