Abstract: The present invention provides a heating unit capable of easily and inexpensively adjusting total impedance based on tire mold size so that a power source can be used at a high power factor, and a tire heating apparatus using the same. A ferromagnetic metallic member 10a heats a tire mold M1 by heat conduction. An induction heating coil C1 is disposed on the side of the ferromagnetic metallic member 10a opposite the tire mold M1 to induction-heat the ferromagnetic metallic member 10a by generating magnetic field lines. A nonmagnetic conductor 30a is disposed on the side of the induction heating coil C1 opposite the ferromagnetic metallic member 10a to shield the magnetic field lines generated by the induction heating coil C1. A heating unit 100a including these elements heats the tire mold M1 storing a tire.

Abstract: It is an object of the present invention to prevent or suppress the occurrence of a temperature difference between upper and lower portions of a green tire in a vulcanizing process carried out by a tire vulcanizing machine 1 and thereby stabilize the tire quality. The tire vulcanizing machine 1 comprises a tire vulcanizing bladder 20 disposed inside a green tire 4, a jet section 90 for jetting a heating/pressurizing medium to the interior of the bladder 20, a medium supply path for supplying the heating/pressurizing medium to the jet section 90, and a holding section 14 for holding an edge portion of the bladder 20, the edge portion being located on the side close to the medium supply path. Further, there are disposed heat insulators 7, 11, 8 and 6 so as to suppress the transfer of heat from the heating/pressurizing medium jetted from the jet section 90, to a lower edge portion of the green tire 4.

Abstract: A tire vulcanizing apparatus and a tire vulcanizing method, by which the pressure and temperature of a heating and pressurizing medium to be supplied to the internal space of a raw tire can be controlled without the condition of pressure being affected by the condition of temperature.

Abstract: It is an object of the present invention to prevent or suppress the occurrence of a temperature difference between upper and lower portions of a green tire in a vulcanizing process carried out by a tire vulcanizing machine 1 and thereby stabilize the tire quality. The tire vulcanizing machine 1 comprises a tire vulcanizing bladder 20 disposed inside a green tire 4, a jet section 90 for jetting a heating/pressurizing medium to the interior of the bladder 20, a medium supply path for supplying the heating/pressurizing medium to the jet section 90, and a holding section 14 for holding an edge portion of the bladder 20, the edge portion being located on the side close to the medium supply path. Further, there are disposed heat insulators 7, 11, 8 and 6 so as to suppress the transfer of heat from the heating/pressurizing medium jetted from the jet section 90, to a lower edge portion of the green tire 4.

Abstract: A tire vulcanizing apparatus and a tire vulcanizing method, by which the pressure and temperature of a heating and pressurizing medium to be supplied to the internal space of a raw tire can be controlled without the condition of pressure being affected by the condition of temperature.

Abstract: The present invention provides a heating unit capable of easily and inexpensively adjusting total impedance based on tire mold size so that a power source can be used at a high power factor, and a tire heating apparatus using the same. A ferromagnetic metallic member 10a heats a tire mold M1 by heat conduction. An induction heating coil C1 is disposed on the side of the ferromagnetic metallic member 10a opposite the tire mold M1 to induction-heat the ferromagnetic metallic member 10a by generating magnetic field lines. A nonmagnetic conductor 30a is disposed on the side of the induction heating coil C1 opposite the ferromagnetic metallic member 10a to shield the magnetic field lines generated by the induction heating coil C1. A heating unit 100a including these elements heats the tire mold M1 storing a tire.

Abstract: The object of the present invention is to provide a vulcanization molding and its vulcanizing machine in which a heating pressure medium, which is nitrogen gas, is heated at high heat exchange ratio without an increase in the running cost and an increase in size. The vulcanizing machine includes a mold mechanism such as a lower side mold 5 and an upper side mold 25 and the like, which removably accommodate a green tire 4, an agitating mechanism 30, which agitates a heating pressure medium such as nitrogen gas or the like, which vulcanization mold the green tire 4 by heating the green tire 4 while pressing it against the mold mechanism, and an induction heating mechanism 41, which preferentially heats the agitating mechanism 30.

Abstract: The disclosed information describes a preheating method and apparatus for preheating raw tire including metal members embedded therein prior to vulcanization molding process, to heat whole part of the raw tire up to desirable temperature rapidly and certainly to complete vulcanization molding in a short time. The disclosed apparatus comprises a retaining means for retaining raw tire in a predetermined attitude in a releasable manner; a induction heating means for heating the metal members inductively by means of a high frequency magnetic field, the high frequency magnetic field being applied to raw tire retained by the retaining means; and a radiation heater for heating a rate-limiting portion radiatively, the temperature of the rate-limiting portion rising slowly under only induction heating for the metal members.

Abstract: A post cure inflator for expansion-cooling a vulcanized tire is provided with a vulcanized-tire holding mechanism for holding the vulcanized tire and a rotating mechanism for rotating the vulcanized tire at a high speed via the vulcanized-tire holding mechanism such that a forced convection becomes more dominant than a natural convection in an air flow around the vulcanized tire.

Abstract: A raw tire-preheating method and apparatus for preheating a raw tire uniformly over all the areas with a reduced running cost. The raw tire-preheating apparatus comprises a tread section-preheating mechanism (16) including a front coil (21) disposed so as to face a tread section (4a) for generating a high frequency magnetic field and for applying it to the tread section (4a); and a core mechanism consisting of center cores (24), separation cores (25) and side cores (26) for providing an intensity distribution of the high frequency magnetic field that the tread section (4a) is uniformly preheated overall in the tire width direction. A movement mechanism for moving at least one of the tread section-preheating mechanism (16) and the raw tire (4) is provided in order to move the tread section-preheating mechanism (16) relative to the tread section (4a).

Abstract: An apparatus for effectively heating a green tire generates heat to a metal member embedded therein using electromagnetic induction, to complete a heating formation of a green tire in a sufficiently short time. Particularly, in the thick portion of the green tire which is hard to heat, the efficiency of heat generation due to electromagnetic induction is increased by effectively concentrating a high frequency magnetic field on the metal member embedded therein. The apparatus for heating a green tire includes a local heating coil for forming a high frequency magnetic field along a portion of extending direction of a metal member, a high frequency power supply for supplying high frequency power to the local heating coil, and a mechanism for moving the local heating coil relatively in the extending direction of the metal member.

Abstract: A post cure inflator for expansion-cooling a vulcanized tire is provided with a vulcanized-tire holding mechanism for holding the vulcanized tire and a rotating mechanism for rotating the vulcanized tire at a high speed via the vulcanized-tire holding mechanism such that a forced convection becomes more dominant than a natural convection in an air flow around the vulcanized tire.

Abstract: An apparatus for effectively heating a green tire generates heat to a metal member embedded therein using electromagnetic induction, to complete a heating formation of a green tire in a sufficiently short time. Particularly, in the thick portion of the green tire which is hard to rise temperature heat, the efficiency of heat generation due to electromagnetic induction is increased by effectively concentrating a high frequency magnetic field on the metal member embedded therein. The apparatus for heating a green tire comprises a local heating coil for forming a high frequency magnetic field along a portion of extending direction of a metal member, a high frequency power supply for supplying high frequency power to the local heating coil, and a mechanism for moving the local heating coil relatively in the extending direction of the metal member.

Abstract: The object of the present invention is to provide a vulcanization molding and its vulcanizing machine in which a heating pressure medium, which is nitrogen gas, is heated at high heat exchange ratio without an increase in the running cost and an increase in size. The vulcanizing machine includes a mold mechanism such as a lower side mold 5 and an upper side mold 25 and the like, which removably accommodate a green tire 4, an agitating mechanism 30, which agitates a heating pressure medium such as nitrogen gas or the like, which vulcanization mold the green tire 4 by heating the green tire 4 while pressing it against the mold mechanism, and an induction heating mechanism 41, which preferentially heats the agitating mechanism 30.

Abstract: An object of the present invention is to provide a bladder which is unlikely to have a shapal variation along the inner wall surface of the tire and can satisfactorily extend along the inner wall surface of the tire. An inventive bladder is used to press the inner wall surface of the tire by a pressurized heating medium during the vulcanization of a green tire and is comprised of a fabric layer (purl stitched fabric layer 12) and rubber layers (silicone rubber layers 11, 13) placed one over another. Elongation rates of the fabric layer in warp direction and in weft direction both exceed 15% and satisfy: 0.4≦elongation rate in weft direction/elongation rate in warp direction ≦6.0. Since the fabric layer has good extensibility, it can elongate with the rubber layers.

Abstract: An apparatus for effectively heating a green tire generates heat to a metal member embedded therein using electromagnetic induction, to complete a heating formation of a green tire in a sufficiently short time. Particularly, in the thick portion of the green tire which is hard to heat, the efficiency of heat generation due to electromagnetic induction is increased by effectively concentrating a high frequency magnetic field on the metal member embedded therein. The apparatus for heating a green tire comprises a local heating coil for forming high frequency magnetic field along a portion of extending direction of a metal member, a high frequency power supply for supplying high frequency power to the local heating coil, and a mechanism for moving the local heating coil relatively in the extending direction of the metal member.

Abstract: A rubber-bonded brass composite material prepared by bonding rubber to the surface of a brass-plated material obtained by plating the surface of a substrate with brass or to the surface of a brass material by vulcanization, wherein preheating is carried out before vulcanization to form needle-like Cu—S-based reaction products at the bonding interface between brass and rubber. Thereby, there is provided a rubber-bonded brass composite material having excellent long-term adhesion while excellent initial adhesion at the time of bonding by vulcanization is retained.

Abstract: The disclosed information describes a preheating method and apparatus for preheating raw tire including metal members embedded therein prior to vulcanization molding process, to heat whole part of the raw tire up to desirable temperature rapidly and certainly to complete vulcanization molding in a short time. The disclosed apparatus comprises a retaining means for retaining raw tire in a predetermined attitude in a releasable manner; a induction heating means for heating the metal members inductively by means of a high frequency magnetic field, the high frequency magnetic field being applied to raw tire retained by the retaining means; and a radiation heater for heating a rate-limiting portion radiatively, the temperature of the rate-limiting portion rising slowly under only induction heating for the metal members.

Abstract: This vulcanizing equipment comprises a vulcanizing station, an opening and closing station and a transfer station. The vulcanizing station has a housing shelf vertically having plural stages of placing parts for placing tire mold assemblies movable in closed state, which have pipings for supplying and discharging a vulcanizing/heating medium to the tire mold assemblies placed thereon. The opening and closing station has a placing part for placing the tire mold assembly, an opening and closing device for opening and closing the tire mold assembly placed on this placing part, a carrying-out device for carrying vulcanized tires from the tire mold assembly, and a carrying-in device for carrying unvulcanized tires to the tire mold assembly. The transfer station performs the transfer of the tire mold assembly between an optional stage of the placing parts of the housing shelf and the placing part of the opening and closing station by the rising and falling action along the housing shelf of the vulcanizing station.

Abstract: When a green tire is molded on a bladder in molding step and then carried into the mold of a vulcanizer in vulcanization step to vulcanization-mold the green tire, the upper bead and lower bead of the green tire are connected and fixed through a center post as they are retained by the bladder kept in the airtight state by an upper ring and a lower ring until the molded green tire has been carried into the mold of the vulcanizer, and a pressure gas is sealed into the bladder located in the internal space of the green tire to lay it in the expanded state, whereby the green tire can be carried between the steps and carried into the mold in the state maintaining a fixed shape. Accordingly, the deformation of the green tire can be prevented, and the slippage of supporting center of the green tire when set in the vulcanizer can be sufficiently reduced.