Abstract:
The method of forming a bead 10 having a trailing end 12 of at least one bead wire 14 being anchored in the bead 10. The method including the steps of (i) securing a leading end of the bead wire 14; (ii) winding the bead wire 14 about a former 42 a plurality of revolutions to form the bead 10 into a desired cross-sectional shape; and (iii) cutting the bead wire 14 after a last revolution 28 about the former 42. The method being characterized by (iv) anchoring the trailing end 12 of the bead wire 14 by driving it into the bead 10. The driving of the trailing end 12 forces the trailing end 12 between at least two previously wound, abutting revolutions of the bead wire 14, at least temporarily separating the respective revolutions.
Abstract:
A method and apparatus are provided for a sub forming an elastomeric extrusion into a bead apex filler and for applying the same to an annular bead (120) to form a bead/apex subassembly for use in the construction of a pneumatic tire. The apex filler (100) is formed from a triangular shaped extrusion (8) that is initially wrapped around a rotating mandrel (40) having a diameter of between about 50% to about 75% of the outer diameter of the annular bead to which the filler is attached. A helical former (50, 60) disposed around the mandrel causes the extrusion to move in a helical path as it traverses the mandrel. As the extrusion is removed from the mandrel, the extrusion is sufficiently uncoiled to relieve and compressive or tensile stresses. Then, the partially uncoiled extrusion is wrapped around the outer periphery of the bead to form a bead/apex filler subassembly (118) which is substantially without compressive or tensile stresses when mounted onto the tire being constructed.
Abstract:
A tire bead holder assembly for centering and gripping a circular tire bead before placement on a bead setter has circumferentially spaced radially moveable fingers actuated by a chain drive for simultaneous controlled movement of the fingers and application of centering pressure without distortion of the bead.
Abstract:
The present invention provides a method of making a tire bead (16) with a tape (10) composed of two parallel wires (12a, 12b) having a coating (28) of resilient elastomeric material and connected by a web (14). The tire bead (16) can be built by winding the tape (10) in side by side relation and in successive superposed layers of predetermined widths and with convolutions spanning superposed layers to provide the tire bead (16) of predetermined cross-sectional area.
Abstract:
A manufacturing apparatus for single-wire bead provided with a winding device winding a wire onto a drum to form a formed bead, a thread winding device winding a thread to both ends of the wire on approximately same position in a circumferencial direction of the formed bead to form an intermediate bead, an apex fitting device fitting an apex to the intermediate bead to form a finished bead, and having a transfering device reciprocating between a first position and a second position. On the first position, the formed bead is taken out of the winding device and the intermediate bead is taken out of the thread winding device. And, on the second position, the formed bead is transferred to the thread winding device and the intermediate bead is transferred to the apex fitting device.
Abstract:
A method of producing at least two single wire tyre bead cores comprising drawing off at least two bead wires from separate coils (20) of wires, passing the wires through wire processing means (23) to coat the drawn-off wires with rubber material, passing the rubber-coated wires through first festooner apparatus (24) and subsequently winding the rubber-coated wires on a former (36) to create at least two single wire tyre bead cores on the former. Before the wires are passed through the first festooner apparatus (24) they are joined together in the wire processing means (23). The joined together rubber coated wires are split (at 30) after passing through the first festooner apparatus (24) and, after being split, are passed through second festooner apparatus (31) before being wound on the former (36). The invention also relates to apparatus for producing at least two single wire tyre bead cores.
Abstract:
The present invention provides a method of making a tire bead core (40) by winding a length of wire into a coil with at least one radially outermost layer (30) having a side-by-side relationship where each successive winding of the wire is placed adjacent to the previous winding except for the final two windings (18,19) where the wire of the next to last winding (18) is wound with a uniform gap (43) relative to the previous winding (17) and where the final winding (19) of the wire and its cut end (20) cross over the top of the next to last winding (18) and are pressed into the gap (43) and constrained by the wire of the two previous windings (17, 18).
Abstract:
A method of assembling a tire carcass comprising applying a cord reinforced rubber ply to a toroidal-shaped former such that the edges of the ply are located on radially inner portions of the former, placing a circular bead component adjacent to each edge and stitching each ply edge to its said circular bead component to secure the ply edge in the region of the tire bead.
Abstract:
A bead wire winding device is provided with a winding guide(s) (3) which is rotated with a molding support body (1), and which approachingly and retreatingly displaces with respect to each side portion of the molding support body (1). A bead wire (W) is supplied to a wire seating portion (11) of the winding guide (3) within a space defined by each winding guide (3) which is in an approached state with respect to a respective side surface of the molding support body (1), and in an enlarged diameter state. The winding guide (3) is constituted by a plurality of radially displacing members (9), which can be enlargingly and reducingly displaced in a radial direction, connected to a boss portion (7) through link members (8). Each of the radially displacing members (9) has a protrusion that forms a wire seating portion (11). A clamping claw (13) is provided on at least one of the radially displacing members (9), and is urged constantly in a closing direction and pinches a tip portion of the bead wire (W).
Abstract:
A structure and a method for supplying a bead-with-filler automatically to a tire molding machine are provided. The structure comprises a bead-with-filler preset apparatus for presetting a filler to an annular bead; a bead supply apparatus positioned at an upper stream side of the bead-with-filler preset apparatus for supplying the annular bead to the bead-with-filler preset apparatus; a bead-with-filler supplying apparatus positioned at a down stream side of the bead-with-filler preset apparatus for supplying the bead-with-filler to a tire molding machine; and a transfer apparatus for transferring the bead and the bead-with-filler having a catching section. The transfer apparatus turns for positioning the catching section at each delivery position of the bead supply apparatus, the bead-with-filler preset apparatus and the bead-with-filler supply apparatus.