Abstract: A tire vulcanizing apparatus includes a mold having a tread mold including a plurality of segments arranged in a tire circumferential direction, and upper and lower side molds. Each of the segments includes an upper segment portion and a lower segment portion which are divided up and down. The apparatus includes a segment supporting unit which supports the upper segment portion and the lower segment portion so as to be movable to the same side in a tire radial direction and opposite sides to each other in a tire axial direction.

Abstract: To improve durability by preventing breakage of each roller piece for a long time. It is a pressure roller for pressing a surface of a tire member made from an unvulcanized rubber member. The pressure roller has a support shaft and a plurality of elastically deformable roller pieces supported by the support shaft and arranged in the axial direction of the support shaft. Each roller piece has a pressing surface for contacting with the surface of the tire member. Each roller piece is independently rotatably supported by the support shaft.

Abstract: A device for manufacturing a multiple layer rubber strip including a first rubber strip and a second rubber strip, the device includes a first rubber extruder for extruding the first rubber strip, a second rubber extruder for extruding the second rubber strip, a first conveyor for conveying the first rubber strip extruded from the first extruder to a downstream side in a convey direction, and a second conveyor for conveying the second rubber strip extruded from the second extruder to a downstream side in the convey direction. The second conveyor is located upwardly of the first conveyor and has a downstream conveyor end which positions above a conveying surface of the first conveyor such that the second rubber strip delivered from the downstream conveyor end meets and overlaps the first rubber strip on the first conveyor at a joining location to form the single multiple layer rubber strip.

Abstract: To reliably and efficiently make foreign matters adhered onto a green tire formed by a strip winding method. It comprises a raw data acquiring step Sa in which raw three-dimensional data D0 about an examination surface 3 are created through rotation of a green tire T and through irradiation with sensor light 2L in an X direction by a two-dimensional displacement sensor 2; an averaging processing step Sb in which processed three-dimensional data D1 are obtained by averaging processing the raw three-dimensional data D0; and an imaging step Sc in which the distance data z in the processed three-dimensional data D1 are each binarized, and an image is created from the binarized processed three-dimensional data D2. The widths Wx and Wy of a range K of the averaging process are set to be greater than a spiral pitch P of a rubber strip G and less than a width Gw of the rubber strip G.

Abstract: The present invention forms bead apex rubber with good precision on the outer circumferential surface of the bead core. A molding process, in which unvulcanized rubber is made to flow into a bead apex molding chamber that is surrounded by surfaces that include the outer circumferential surface of a circular bead core and the bead apex rubber is formed directly on the outer circumferential surface of the bead core that is rotating around the core axis, is provided. The molding process comprises: a tip forming step that forms the leading end of the bead apex rubber; a middle section forming step that sequentially forms the bead apex rubber to be continuous with the leading end; and a joining step to join the back end and the leading end of the bead apex rubber by inflowing the unvulcanized rubber therebetween.

Abstract: A tire vulcanizing apparatus includes a mold having a tread mold including a plurality of segments arranged in a tire circumferential direction, and upper and lower side molds. Each of the segments includes an upper segment portion and a lower segment portion which are divided up and down. The apparatus includes a segment supporting unit which supports the upper segment portion and the lower segment portion so as to be movable to the same side in a tire radial direction and opposite sides to each other in a tire axial direction.

Abstract: In a gear pump device for rubber extrusion, prolongation of the maintenance intervals is intended by preventing rubber scorch occurring at the gear support-shaft portion. It has a bushing ring 5 inserted in a gear-housing bore 3 of a housing 4. The bushing ring 5 rotatably supports a support-shaft portion 7 of a gear 2 accommodated in the gear-housing bore 3. The bushing ring 5 has a bearing 15 and a sealing means 16 built-in. The sealing means 16 includes a seal ring 22 of which cross section is ]-shaped and which has a first lip portion 22i contacting with the outer peripheral surface of the support-shaft portion 7, a second lip portion 22o disposed outside thereof in the radial direction, and a side wall portion 22m connecting between outer ends in the axial direction, of the first and second lip portions 22i, 22o.

Abstract: A tire vulcanizing apparatus includes a vulcanization mold including a lower mold and an upper mold to define a tire mold cavity for vulcanizing a green tire together with a rigid core on which the green tire is formed, a base portion, a lower plate to which the lower mold is attached, the lower plate supported by the base portion, a first ring having a circular shape with a center corresponding to an axial center of the vulcanization mold and arranged between the base portion and the lower plate, an upper plate to which the upper mold is attached so as to face the lower mold up and down, and a lifting device for moving the upper plate up and down between a lower location to close the vulcanization mold and an upper location in which the upper mold positions opening the vulcanization mold.

Abstract: A method for manufacturing a tire T comprises a step for forming a green tire on the outside of a rigid core mold 2, a step for vulcanization-molding and obtaining a tire-accompanying rigid core mold G, a step for setting, at an assembly station P3, a core 5 taken out from the tire-accompanied rigid core mold G, and a removal and assembly step for removing one core segment 3 from the tire T by moving in inwardly in the tire radial direction from the tire-accompanying rigid core mold G and mounting it on the core 5 set at the assembly station. The removal and assembly step is performed for every core segment in the tire, whereby a rigid core mold 2 is assembled at the assembly station P3, while removing the rigid core mold 2 from the tire T.

Abstract: To reliably and efficiently make foreign matters adhered onto a green tire formed by a strip winding method. It comprises a raw data acquiring step Sa in which raw three-dimensional data D0 about an examination surface 3 are created through rotation of a green tire T and through irradiation with sensor light 2L in an X direction by a two-dimensional displacement sensor 2; an averaging processing step Sb in which processed three-dimensional data D1 are obtained by averaging processing the raw three-dimensional data D0; and an imaging step Sc in which the distance data z in the processed three-dimensional data D1 are each binarized, and an image is created from the binarized processed three-dimensional data D2. The widths Wx and Wy of a range K of the averaging process are set to be greater than a spiral pitch P of a rubber strip G and less than a width Gw of the rubber strip G.

Abstract: A tire vulcanizing apparatus includes a vulcanization mold including a lower mold and an upper mold to define a tire mold cavity for vulcanizing a green tire together with a rigid core on which the green tire is formed, a base portion, a lower plate to which the lower mold is attached, the lower plate supported by the base portion, a first ring having a circular shape with a center corresponding to an axial center of the vulcanization mold and arranged between the base portion and the lower plate, an upper plate to which the upper mold is attached so as to face the lower mold up and down, and a lifting device for moving the upper plate up and down between a lower location to close the vulcanization mold and an upper location in which the upper mold positions opening the vulcanization mold.

Abstract: To improve durability by preventing breakage of each roller piece for a long time. It is a pressure roller for pressing a surface of a tire member made from an unvulcanized rubber member. The pressure roller has a support shaft and a plurality of elastically deformable roller pieces supported by the support shaft and arranged in the axial direction of the support shaft. Each roller piece has a pressing surface for contacting with the surface of the tire member. Each roller piece is independently rotatably supported by the support shaft.

Abstract: A device for manufacturing a multiple layer rubber strip including a first rubber strip and a second rubber strip, the device includes a first rubber extruder for extruding the first rubber strip, a second rubber extruder for extruding the second rubber strip, a first conveyor for conveying the first rubber strip extruded from the first extruder to a downstream side in a convey direction, and a second conveyor for conveying the second rubber strip extruded from the second extruder to a downstream side in the convey direction. The second conveyor is located upwardly of the first conveyor and has a downstream conveyor end which positions above a conveying surface of the first conveyor such that the second rubber strip delivered from the downstream conveyor end meets and overlaps the first rubber strip on the first conveyor at a joining location to form the single multiple layer rubber strip.

Abstract: In a gear pump device for rubber extrusion, prolongation of the maintenance intervals is intended by preventing rubber scorch occurring at the gear support-shaft portion. It has a bushing ring 5 inserted in a gear-housing bore 3 of a housing 4. The bushing ring 5 rotatably supports a support-shaft portion 7 of a gear 2 accommodated in the gear-housing bore 3. The bushing ring 5 has a bearing 15 and a sealing means 16 built-in. The sealing means 16 includes a seal ring 22 of which cross section is ]-shaped and which has a first lip portion 22i contacting with the outer peripheral surface of the support-shaft portion 7, a second lip portion 22o disposed outside thereof in the radial direction, and a side wall portion 22m connecting between outer ends in the axial direction, of the first and second lip portions 22i, 22o.

Abstract: The present invention forms bead apex rubber with good precision on the outer circumferential surface of the bead core. A molding process, in which unvulcanized rubber is made to flow into a bead apex molding chamber that is surrounded by surfaces that include the outer circumferential surface of a circular bead core and the bead apex rubber is formed directly on the outer circumferential surface of the bead core that is rotating around the core axis, is provided. The molding process comprises: a tip forming step that forms the leading end of the bead apex rubber; a middle section forming step that sequentially forms the bead apex rubber to be continuous with the leading end; and a joining step to join the back end and the leading end of the bead apex rubber by inflowing the unvulcanized rubber therebetween.

Abstract: In order to make a tire factory more compact, this tire manufacturing system comprises a material storage zone, a green tire formation zone, a vulcanization zone, and an inspection and discharge zone. The green tire formation zone has a track and a plurality of work stations arranged along the track, where a green tire is formed by assembling a tire constituent member to an outer surface of a rigid core moving on the track at each of the work stations. A member assembly device that forms the tire constituent member by attaching a member material set for each of the tire constituent members to a surface of the rigid core, under an attachment condition determined according to size of the rigid core. The member assembly devices being arranged at an outer peripheral side of the square-cornered U-shaped bending track and along the lateral track parts. The material storage zone is arranged adjacent to one lateral side of the square-cornered U-shaped bending track.

Abstract: An apparatus 1 for mounting an annular tread ring R on an outer peripheral surface TS of a tire base T, which includes a tire base holding section 2 which is movable between a first position P1 and a second position P2 while holding the tire base T, and a tread ring mounting section 3 for mounting the tread ring R on the outer peripheral surface TS of the tire base T. The tread ring mounting section 3 comprises a tread holder 10 for holding the inner circumferential surface of the tread ring R, and a tread pushing-out device 11 for pushing out the tread ring R in the axis direction. At the second position P2, after placing the tread ring R on the outer peripheral surface TS of the tire base T in the tire base holding section 2, the tread ring mounting section 3 pushes out the tread ring R from the tread holder 10 toward the first position P1 by the tread pushing-out device 11.

Abstract: The present invention forms bead apex rubber with good precision on the outer circumferential surface of the bead core. A molding process, in which unvulcanized rubber is made to flow into a bead apex molding chamber that is surrounded by surfaces that include the outer circumferential surface of a circular bead core and the bead apex rubber is formed directly on the outer circumferential surface of the bead core that is rotating around the core axis, is provided. The molding process comprises: a tip forming step that forms the leading end of the bead apex rubber; a middle section forming step that sequentially forms the bead apex rubber to be continuous with the leading end; and a joining step to join the back end and the leading end of the bead apex rubber by inflowing the unvulcanized rubber therebetween.

Abstract: The purpose of the present invention is to efficiently vulcanize a green tire. This tire vulcanizing method and tire manufacturing method for vulcanizing a green tire 2A formed on an outer surface 11s of a rigid core by putting in a vulcanizing mold together with the rigid core 3A. The method comprising: a preheating step S1 of preheating the rigid core accompanied by green tire 3A using a preheating device 5 arranged adjacent to the vulcanizing mold 4 prior to vulcanizing; a vulcanizing step S3 of vulcanizing the green tire accompanied by preheated rigid core 3A using the vulcanizing mold 4; and a cooling step S5 of cooling the rigid core accompanied by vulcanized tire 3B which has a vulcanized tire 2B made by vulcanizing the green tire 2A by use of a cooling device 6.

Abstract: Provide a manufacturing method and a manufacturing device for a rubber strip capable of stably manufacturing a tape-like rubber strip of unvulcanized rubber. The rubber strip manufacturing device (1) for manufacturing a tape-like rubber strip (G2) made of unvulcanized rubber is characterized in including: a rubber extruder (3) comprising a rubber extruder main body (6) having a screw shaft (6c) for kneading and pushing the unvulcanized rubber toward an outlet opening (6d), and a gear pump (7) connected to the outlet opening (6d) of the rubber extruder main body (6) and rotary-driven by a first motor (M1); a calender head (4) comprising a pair of calender rollers (4a,4b) for rolling a shaped rubber body extruded from the rubber extruder (3) to obtain the rubber strip (G2); and a control unit (70) for controlling a second motor (M2) for rotary-driving the calender rollers in conjunction with the first motor (M1).