Process and molding element for molding a groove in a tire tread

Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se

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Details

249142, 264319, 264326, 425 46, 425195, B29C 3500, B29C 3936

Patent

active

061432237

ABSTRACT:
A process of molding of a rubber tread making it possible, after molding grooves, to strip the mold without rupture of connecting elements molded in the grooves. A molding element for molding a groove pattern in a rubber tread, the groove defined by at least two main opposite walls joined by at least one molded rubber connecting element, the molding element being designed to project from a molding surface of the mold and presenting at least one opening for molding a connecting element during molding of the tread. The molding element is constituted by the assembly of a first part forming a support, intended to be fastened to a piece of a mold by appropriate means, and of a second part constituted by at least one piece forming a key. Each key is disengaged from the support in order to strip the molding element from the mold.

REFERENCES:
patent: 1223726 (1917-04-01), Overman
patent: 1733064 (1929-10-01), Lambert
patent: 2661041 (1953-12-01), Walsh
patent: 4921673 (1990-05-01), Holroyd et al.
patent: 4992035 (1991-02-01), Holroyd et al.
patent: 5022448 (1991-06-01), Ochiai
patent: 5340294 (1994-08-01), Kata
patent: 5980810 (1999-11-01), Ladouce

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