Abstract: An apparatus of manufacturing a rubber member includes an extruder; a mouthpiece; and a support surface which faces the mouthpiece in an opposed manner. The support surface and the mouthpiece are moved relative to each other thus molding a rubber member on the support surface. The apparatus further includes: a rubber pool portion formed between the mouthpiece and the support surface; and a closing surface having an inclined surface shape and capable of closing a moving-direction front side of the rubber pool portion.

Abstract: A strip rubber adhering apparatus includes a rotating drum; an extruder configured to extrude strip rubber of a shape having an apex portion in cross section toward the drum; a pressure bonding roller configured to press a surface of the strip rubber on the apex portion side in the direction of the drum, and adhere the surface of the strip rubber on a side opposite to the apex portion side to the drum; and a blowing apparatus configured to supply wind toward the surface of the strip rubber on the apex portion side in the vicinity of a position of adhesion of the strip rubber with respect to the drum, wherein the drum and the extruder are relatively movable in the direction of axis of the drum with respect to each other.

Abstract: An apparatus of manufacturing a rubber member includes an extruder; a mouthpiece; and a support surface which faces the mouthpiece in an opposed manner. The support surface and the mouthpiece are moved relative to each other thus molding a rubber member on the support surface. The apparatus further includes: a rubber pool portion formed between the mouthpiece and the support surface; and a closing surface having an inclined surface shape and capable of closing a moving-direction front side of the rubber pool portion.

Abstract: An apparatus for manufacturing a rubber member includes an extruder; a mouthpiece; and a support surface which faces the mouthpiece in an opposed manner. The apparatus further includes: a rubber pool portion formed between the mouthpiece and the support surface; and a closing surface having an inclined surface shape and capable of closing a moving-direction front side of the rubber pool portion. A rubber material is ejected from an ejection port in a state where the rubber pool portion is closed by the closing surface, the support surface and the mouthpiece are moved relative to each other after the rubber pool portion is filled with the rubber material, and a lamination starting end of the rubber material is pressed to the closing surface thus molding the lamination starting end into an inclined surface and, thereafter, the closing surface is moved in a direction away from the support surface.

Abstract: A strip rubber adhering method includes: extruding strip rubber of a shape having an apex portion in cross section from an extruder and moving the same forward toward a drum; pressing a surface of the strip rubber on the apex portion side by a pressure bonding roller, adhering the strip rubber to the drum, moving relatively the drum and the extruder with respect to each other in an axial direction of the drum, and winding the strip rubber around the drum in a spiral manner; and exposing the surface of the strip rubber on the apex portion side to wind from a blowing apparatus in the vicinity of a position of adhesion of the strip rubber to the drum and cooling the surface of the strip rubber on the apex portion side.

Abstract: A manufacturing method of a pneumatic tire comprises a forming step of a tread rubber which includes a two-shot stage of simultaneously winding a first rubber ribbon constructed by a nonconductive rubber, and a second rubber ribbon constructed by a nonconductive rubber. In the two-shot stage, the first rubber ribbon and the second rubber ribbon which are adjacent to each other are spirally wound in such a manner as to come into contact with each other, and a ribbon winding position passes through an L-shaped route. A conductive rubber is partly provided in the first rubber ribbon in the winding process when the ribbon winding position passes through the L-shaped route. A conductive portion which spirally and continuously extends to the tread end from the ground-contacting surface and intermittently appears in the tire meridian cross section is formed by the conductive rubber.

Abstract: A strip rubber adhering apparatus includes a rotating drum; an extruder configured to extrude strip rubber of a shape having an apex portion in cross section toward the drum; a pressure bonding roller configured to press a surface of the strip rubber on the apex portion side in the direction of the drum, and adhere the surface of the strip rubber on a side opposite to the apex portion side to the drum; and a blowing apparatus configured to supply wind toward the surface of the strip rubber on the apex portion side in the vicinity of a position of adhesion of the strip rubber with respect to the drum, wherein the drum and the extruder are relatively movable in the direction of axis of the drum with respect to each other.

Abstract: An apparatus for manufacturing a rubber member includes an extruder; a mouthpiece; and a support surface which faces the mouthpiece in an opposed manner. The apparatus further includes: a rubber pool portion formed between the mouthpiece and the support surface; and a closing surface having an inclined surface shape and capable of closing a moving-direction front side of the rubber pool portion. A rubber material is ejected from an ejection port in a state where the rubber pool portion is closed by the closing surface, the support surface and the mouthpiece are moved relative to each other after the rubber pool portion is filled with the rubber material, and a lamination starting end of the rubber material is pressed to the closing surface thus molding the lamination starting end into an inclined surface and, thereafter, the closing surface is moved in a direction away from the support surface.

Abstract: A strip rubber adhering method includes: extruding strip rubber of a shape having an apex portion in cross section from an extruder and moving the same forward toward a drum; pressing a surface of the strip rubber on the apex portion side by a pressure bonding roller, adhering the strip rubber to the drum, moving relatively the drum and the extruder with respect to each other in an axial direction of the drum, and winding the strip rubber around the drum in a spiral manner; and exposing the surface of the strip rubber on the apex portion side to wind from a blowing apparatus in the vicinity of a position of adhesion of the strip rubber to the drum and cooling the surface of the strip rubber on the apex portion side.

Abstract: A pneumatic tire molding device includes an extruder which mixes and discharges a rubber material, a mouth piece which is attached to a leading end of the extruder, and a rotary support body around which a rubber strip discharged out of a discharge port of the mouth piece is wound, wherein a receiving portion is formed in the mouth piece closer to a rear side in a rotating direction of the rotary support body than the discharge port in an end surface facing to a rotation surface of the rotary support body, the receiving portion being capable of receiving the rubber strip which has been already wound around the rotary support body.