Method for manufacturing an airtight layer used in the composition of a tire
AssigneeCompagnie Generale Des Etablissements Michelin
InventorsFrederic Pialot, Jose Merino Lopez
Life of this patent
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Abstract
A method for manufacturing a composite airtight layer (20) used in the composition of a tire (30) comprises: a film (21) made of thermoplastic material is heated such that the film is able to plastically deform; the film is deformed (120) with the aid of corrugating means, the thickness of the film (21) being in a range from 0.01 to 0.2 mm, and the film having corrugations with a pitch and amplitude chosen in a range from 0.1 to 10 mm so as to give the film a given elongation capacity; the film is cooled such that the corrugated film is no longer able to be plastically deformed; and the corrugated film is coated in a matrix (22) of elastomer material, so as to form a composite airtight layer (20).
Claims9
A method for manufacturing a composite airtight layer used in the composition of a tire, the method comprising:
- heating a film made of thermoplastic material such that the film is able to plastically deform;
- depositing the film on a radially external surface of a green tire in a process of being built, the radially external surface having grooves;
- deforming the film by depositing the film on the grooves to conform to contours thereof and obtain a corrugated film having corrugations, the corrugated film having a thickness in a range from 0.01 to 0.2 mm, the corrugations having a pitch and amplitude in a range from 0.1 to 10 mm so as to give the corrugated film an elongation capacity, and the corrugations of the corrugated film extending along generatrices that are straight and mutually parallel;
- cooling the corrugated film such that the corrugated film is no longer able to be plastically deformed;
- and
- coating the corrugated film in a matrix of elastomer material so as to form a composite airtight layer.
Dependencies are inferred from the claim text.