Patent ID: 6817848
Filing Date: 2004-11-16
Classification: B29D,Y10S

Abstract:
A mold for molding a tire, comprising:at least two sub-molds, each said sub-mold comprising a portion of a whole, predetermined shape of said mold, and each said sub-mold further comprising: a plurality of air removal apertures formed on an interior surface of said sub-mold, each of said apertures being in communication with an exterior surface of said sub-mold such that air is discharged from blockades between a green tire present in said mold and said interior surface of said sub-mold; and a plurality of ventlids corresponding to each said aperture, each said ventlid comprising an integral lid mechanism, said lid mechanism comprising a resilient, chemically inactive material that does not fuse with the green tire and having sufficient durability to withstand repeated use at a temperature of 100-200Â° C.; wherein the entirety of each said ventlid is positioned above a respective one of said apertures; wherein said lid mechanism maintains a range of open positions by virtue of the resiliency of said lid mechanism such that air is discharged from said blockade via said aperture while said lid mechanism is in any one of said open positions, and wherein said lid mechanism assumes a closed position upon sufficient contact with the green tire in said mold, thereby sealing said aperture such that air and green tire material are prevented from entering said aperture.