摘要:
A method of manufacturing a fabric with rubber for a tire includes a weft cutting step of cutting a weft of a fabric base substance obtained by coating on a tire woven fabric by a rubber, by a cutting device at a cut pitch Cp twice to five times an arrangement pitch P of a warp. A cut ductility of the weft is set between 5 and 20%. The cutting device comprises a first and second rollers in which peripheral protrusions and peripheral grooves are alternately formed. Groove widths W1 and W2 of the peripheral grooves of the first and second rollers are set between 2.0 and 5.0 mm, protruding widths T1 and T2 of the peripheral protrusions of the first and second rollers are set to 0.25 to 0.5 times the groove widths W1 and W2, and insertion depths h1 and h2 of the peripheral protrusions to the peripheral grooves are set between 2.0 and 4.0 mm.
摘要:
A method of manufacturing a rubber coated fabric for a tire which includes a weft cutting step of cutting a weft of the rubber coated fabric base substance using a cutting device at a cut pitch Cp of two to five times an arrangement pitch P of a warp. The cut ductility of the weft is set between 5 and 20%. The cutting device utilizes first and second rollers in which the peripheral protrusions and the peripheral grooves are alternately formed. Groove widths W1 and W2 of the peripheral grooves of the first and second rollers are set between 2.0 and 5.0 mm, protruding widths T1 and T2 of the peripheral protrusions of the first and second rollers are set to 0.25 to 0.5 times the groove widths W1 and W2, and the insertion depths h1 and h2 of the peripheral protrusions to the peripheral grooves are set between 2.0 and 4.0 mm.
摘要:
A method and an apparatus for butt-jointing edges of an elastic material sheet is disclosed. The elastic material sheet is supported such that the two edges to be butt-jointed are oppositely opposed. By moving a pair of counterrotating conical surfaces along the edges, the surfaces of the edges portions are drawn toward the center between the two edges so that the edges are butt-jointed. Between the conical surfaces, a small space is provided so as to form a small rib-like protrusion along the butt-joint. Then, the small rib-like protrusion of the elastic material is pressed down to flatten. Therefore, at the butt-joint interface, the elastic material irregularly interfuses to increase the strength of the butt-joint.
摘要:
An edge trimmer for an uncured elastomer strip being conveyed in the longitudinal direction of the strip is disclosed. In the uncured elastomer strip, cords laid parallel with each other along the longitudinal direction of the strip, are embedded. The edge trimmer comprises a cutter head comprising a blade for trimming an edge portion of the uncured elastomer strip. The cutter head is freely movable in the transverse direction of the uncured elastomer strip being conveyed. The blade has a pair of v-shaped cutting edges opening towards the upper stream of the conveyed direction of the uncured elastomer strip. Preferably, the thickness of the blade is 1.0 to 2.0 mm, the opening angle of the V-shaped cutting edges is 30 to 70 degrees, an angle of each of the cutting edges is 35 to 65 degrees, and the cutting edges are formed on the thickness center plane of the blade.
摘要:
A method and an apparatus for butt-jointing edges of an elastic material sheet is disclosed. The elastic material sheet is supported such that the two edges to be butt-jointed are oppositely opposed. By moving a pair of counterrotating conical surfaces along the edges, the surfaces of the edges portions are drawn toward the center between the two edges so that the edges are butt-jointed. Between the conical surfaces, a small space is provided so as to form a small rib-like protrusion along the butt-joint. Then, the small rib-like protrusion of the elastic material is pressed down to flatten. Therefore, at the butt-joint interface, the elastic material irregularly interfuses to increase the strength of the butt-joint.
摘要:
The present invention is intended to prevent the residual stress from remaining in an apex. An apparatus for automatically assembling a bead apex according to the present invention comprises: a means for joining both the longitudinal ends of a strip apex having a triangular section with one short side and two long sides and a specified length to each other, and for forming the strip apex in a cylindrical body such that the long sides become the inner and outer peripheral surfaces; a means for forming the cylindrical body into a disk-like shape such that the short side becomes the inner peripheral surface and the long sides become the axial end surfaces; and a means for joining the inner peripheral surface of the disk-like apex to the outer peripheral surface of a bead ring.
摘要:
A spray-painting machine for a pneumatic tire comprises: a tire holder comprising a pair of bead support disks between which the tire is held; at least one spray gun; a spray gun shifter to move the spray gun to a position near the tread face of the tire held by the tire holder; a rotator for the bead support disks to rotate the tire around the rotational axis of the tire; and a controller which controls the spray gun to spray the paint onto the tread face during the tire is rotated. In a method of manufacturing a pneumatic tire, after the raw tire is vulcanized, an identification mark is spray-painted on the tread face of the vulcanized tire.
摘要:
The present invention is intended to prevent the residual stress from remaining in an apex. An apparatus for automatically assembling a bead apex according to the present invention comprises: a means for joining both the longitudinal ends of a strip apex having a triangular section with one short side and two long sides and a specified length to each other, and for forming the strip apex in a cylindrical body such that the long sides become the inner and outer peripheral surfaces; a means for forming the cylindrical body into a disk-like shape such that the short side becomes the inner peripheral surface and the long sides become the axial end surfaces; and a means for joining the inner peripheral surface of the disk-like apex to the outer peripheral surface of a bead ring.