摘要:
An unvulcanized rubber strip (3) is supplied to an outer peripheral surface of a rotating cylindrical body (4) from a sending-out roller (16) which laterally moves in an axial direction of the cylindrical body (4), thereby spirally winding the rubber strip (3) to form a winding body (5). In a tilting reference plane (29) defined as a plane which is in parallel to a plane (4S) passing through an axis (4i) of the cylindrical body (4) and which passes through an axis (16i) of the sending-out roller (16), the sending-out roller (16) is held such that the sending-out roller (16) can tilt positively and negatively within an inclination angle (α) of 0 to 45° with respect to a tilting reference line (N) which is parallel to the axis (4i) of the cylindrical body (4). The sending-out roller (16) is laterally moved while changing the inclination angle (α).
摘要:
The present invention relates to an apparatus for producing at least two rubber strips comprising an extruder for extruding compounded rubber into at least two preliminary rubber strips each having a preliminary cross sectional shape, and a pair of calendar rollers for simultaneously forming the preliminary rubber strips into at least two rubber strips each having a finished cross sectional shape.
摘要:
A former used for shaping a green tire into a toroidal shape and a green tire building system including two formers are disclosed. The former comprises: a pair of bead-lock devices supported by a rotatable tubular shaft in which a central shaft is disposed; a rotational-to-linear motion converter converting rotational motion of the central shaft relative to the tubular shaft to linear motion for causing the bead-lock devices to come close to each other or to get away from each other; a single electric motor; and a clutch for switching the transmission of the rotational motion of the motor to (A) only the central shaft to change the distance between the bead-lock devices or (B) both of the tubular shaft and central shaft to rotate the bead-lock devices. The building system comprises a turntable on which the two formers are disposed towards different directions so that by turning the turntable, each of the formers positions towards a first drum and a second drum in turn.
摘要:
A method and apparatus for manufacturing a green tire capable of preventing the variation of carcass-cord paths between bead cores and disturbances of the carcass cord arrangement are disclosed. An assembly of a bead core and a bead apex rubber is set on the radially outside of a cylindrical carcass assembly, and they are locked with a bead lock ring expanded, while maintain the cylindrical shape. Then, applying tension to the carcass cords between the expanded bead lock rings, the bead apex rubber is folded down towards the tire equator. Further, the edges portions of the carcass are turned up around the bead cores locked.
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:
A method includes a tubular carcass with core forming process (K1), a rubber laminate forming process (K2), and a tubular base tire forming process (K4). The forming process (K1) of forming a tubular carcass with bead core (6R3) on a first drum (20) comprises a tubular carcass forming step (K1a) to form a tubular carcass (6R2) by butt-jointing circumferential end faces of a carcass ply member (6R1) wound singly on the first drum (20), and a bead core joining step (K1b) to form integrally by diameter-expanding and pressing the tubular carcass (6R2) against the bead cores (5) outserted on the radially outer side. In the forming process (K2), rubber members for base tire (Ga) including an inner liner rubber member (G10a) are wound on a second drum (27) so as to form a rubber laminate (11). In the forming process (K4), the tubular carcass with bead core (6R3) is transferred from the first drum (20) to the second drum (27), and the rubber laminate 11 is pressed against the tubular carcass with bead cores (6R3) so as to form a tubular base tire (35).
摘要:
An unvulcanized rubber strip (3) is supplied to an outer peripheral surface of a rotating cylindrical body (4) from a sending-out roller (16) which laterally moves in an axial direction of the cylindrical body (4), thereby spirally winding the rubber strip (3) to form a winding body (5). In a tilting reference plane (29) defined as a plane which is in parallel to a plane (4S) passing through an axis (4i) of the cylindrical body (4) and which passes through an axis (16i) of the sending-out roller (16), the sending-out roller (16) is held such that the sending-out roller (16) can tilt positively and negatively within an inclination angle (α) of 0 to 45° with respect to a tilting reference line (N) which is parallel to the axis (4i) of the cylindrical body (4). The sending-out roller (16) is laterally moved while changing the inclination angle (α).
摘要:
The present invention relates to an apparatus for producing at least two rubber strips comprising an extruder for extruding compounded rubber into at least two preliminary rubber strips each having a preliminary cross sectional shape, and a pair of calendar rollers for simultaneously forming the preliminary rubber strips into at least two rubber strips each having a finished cross sectional shape.