Tire mold and process for the molding of a tire

A tire mold including two shells for the molding of the side walls of the tire, and means for molding the tread of the tire, at least one shell comprising a laminated assembly of lamelliform elements having side faces and edges, the said side faces being oriented substantially parallel to the common axis of the mold and the axis of a tire made therein across the entire widths of said side faces between opposite edges and being adjacent, and means for maintaining sufficient clearance for the passage of air between said lamelliform elements, the molding surface for said side wall being formed of adjacent edges of said lamelliform elements, and in which the said assembly is a winding of a strip in contiguous turns forming a spiral.

A process for molding a tire in a mold having two shells for the molding of the side walls of the tire, and means for molding the tread of the tire, at least one shell comprising a laminated assembly formed of lamelliform elements having side faces and edges, the side faces being oriented substantially parallel to the common axis of the mold and a tire made therein across the entire widths of said side faces between opposite edges and interfacing with adjacent side faces, and means for maintaining said side faces pressed against each other while maintaining sufficient clearance for the passage of air between said lamelliform elements, the molding surface for said side wall being formed of adjacent edges of said lamelliform elements having a thickness between 0.1 and 5 mm., said process including, at the time of the molding, the steps of evacuating air from the mold by axial flow through the clearances between the side faces of the lamelliform elements and molding the side walls of the tire against the edges of said lamelliform elements.

A tire mold including two shells for the molding of the side walls of the tire, at least one shell comprising a laminated assembly formed of lamelliform elements having side faces and edges, the said side faces being oriented substantially parallel and concentric to the common axis of the mold and a tire made in the mold across the entire widths of said side faces between opposite edges and interfacing with adjacent substantially concentric side faces, the thickness of said lamelliform elements being between 0.1 and 5 mm., and means for maintaining the said side faces pressed against each other while maintaining sufficient clearance for the axial passage of air between said lamelliform elements, the molding surface for said side wall being formed of adjacent, substantially concentric edges of said lamelliform elements.

A process for molding a tire in a mold having two shells for the molding of the side wall of the tire, and means for molding the tread of a tire, at least one shell comprising a laminated assembly formed of lamelliform elements having side faces and edges, the side faces being oriented substantially parallel and concentric to the common axis of the mold and a tire made therein across the entire widths of the side faces between opposite edges and interfacing with adjacent substantially concentric side faces, the thickness of said lamelliform elements being between 0.1 and 5 mm., and means for maintaining the side faces pressed against each other while maintaining sufficient clearance for the passage of air between said lamelliform elements, the molding surface for said side wall being formed of adjacent, substantially concentric, edges of said lamelliform elements, said process including, at the time of molding, the steps of evacuating air from the mold by axial flow through the clearance between the concentric side faces of the lamelliform elements and molding the side walls of a tire against the substantially concentric edges of said lamelliform elements.

A tire mold including two shells for the molding of the side walls of the tire, and means for molding the tread of the tire, at least one shell comprising a laminated assembly of lamelliform elements having side faces and edges, the said side faces being oriented substantially parallel to the common axis of the mold and the axis of a tire made therein across the entire widths of said side faces between opposite edges and being adjacent, the molding surface for said side wall being formed of adjacent edges of said lamelliform elements, and in which the said assembly is a winding of a strip in contiguous turns forming a spiral.