Patent ID: 7094303
Filing Date: 2006-08-22
Classification: B29D

Abstract:
1. A method for manufacturing a tire core on an inner mold mandrel having the shape of a tire inner surface and receives an outer mold fitted thereover that a flow of an elastomeric material is directed into in a spin casting operation where the mold annular area is filled and encapsulates the tire core, forming a tire comprising the steps of, assembling an inner mold that includes top and bottom hub plates with a hub fitted therebetween forming an assembly, with the assembly having a center passage therethrough and aligned ports and a mandrel having a shape of a tire interior wall encircling said hub, with said mandrel exterior surface to receive a core of plies, belts and beads built thereon; fitting an axle through said center passage and supporting at least an end of said axle on a build stand that allows the inner mold to be turned affording access to the mandrel sides and crown; fitting a layer of a porous spacing material around said mandrel crown; fitting a plies expander cone large diameter end over an edge of said spacing material to approximately the center of said mandrel crown; moving an end of a sleeve woven from plies cords over a lesser diameter end of said expander cone and moving it along said expander cone to travel across and beyond said mandrel crown; removing the plies expander cone and fitting inelastic beads over each plies sleeve end; fitting a bead centering plate into each said plies sleeve end and sliding it therealong to where an edge of said bead centering plate picks up said bead and moves it into contact with a mandrel side; folding said plies sleeve over said bead, with said plies sleeve, after folding over said bead, urged into contact with the side of said plies, above said bead; applying a spacer layer formed of a flexible porous material around the mandrel crown, above said plies; applying a continuous belt that is a cylinder formed as a weave of belt cords that cross; fitting a spacing layer formed from a flexible porous material around said mandrel, on top of said belt; positioning a layer of tire cord around the crown; covering said belt; installing the inner mold onto an outer mold disk shaped base plate and fitting a cylindrical ring having tread embossed around its inner circumference on said outer mold base, adjacent to its edge, and capping said cylinder with an outer mold disk shaped top plate that has a center opening therein, completing the outer mold containing the inner mold mounting the core of plies, belts and beads in an annular area between said inner and outer molds, providing a finished mold for positioning in a casting well for spinning to receive a flow of liquid elastomeric material to encapsulate the core of plies, belts and beads in a finished tire.