摘要:
In a green tire charging apparatus for a tire vulcanizing machine according to the present invention, provision is made such that a vertically movable chuck body is inserted into a tire, chuck segments which are synchronously slidable in the radial direction are expanded to concentrically hold an upper bead portion by upper projections of centering rods, the chuck body is raised to insert the upper bead portion into an upper bead ring of a metal mold, subsequently the upper bead portion is held by holder arms of holders, the chuck body is lowered to hold a lower bead portion of the tire by lower projections of the centering rods, and the lower bead portion is inserted into a lower bead ring of the metal mold. Owing to the above-mentioned the upper and lower bead portion of provision, even a deformed green tire can be surely set on the upper and lower bead rings, respectively, of the metal mold.
摘要:
After loading a green tire in a tire vulcanizing machine and before shaping, bead portions of the green tires are centered relative to bead rings of upper and lower metal molds and are sequentially inserted into the bead rings precisely in parallel thereto by the same extendable/retractable sectors and chucks which are movable vertically. An apparatus preferable for practicing the aforementioned method includes a plurality of such sectors for centering and holding a bead portion of the green tire, slide and linkage mechanisms for extending and retracting chucks to which the sectors are mounted, and a cylinder mechanism for vertically moving the chucks so as to insert the bead portion of the green tire centered and held by the sectors into a bead ring of a tire metal mold.
摘要:
A vulcanizing apparatus having penetrating passages connected and communicated with a jacket portion of a mold member. An upper open end portion of one of the penetrating passages is connected to a steam inlet pipe while an upper open end portion of the other penetrating passage is connected to a steam outlet pipe. The connections and communications of the jacket portion with the steam inlet and outlet pipes can be simultaneously and efficiently completed in a single operation. Inner tubes are slidably disposed along the penetrating passages and pressed against the connecting surface of the mold, and appropriate pressure is applied on the seal packing member on the connecting surface independent from the clamping force of the upper mold in order to ensure reliable sealing.
摘要:
A method of setting a crude tire into a space between upper and lower molds in a tire vulcanizing press having upper and lower mold units movable relative to each other includes the steps of pushing an upper bead of the crude tire into a bead of the upper mold by a vertically movable device which supports the upper bead of the crude tire, introducing gas into a bladder to expand the bladder while restricting the elevation of an upper portion fixing ring of a bladder holder mechanism attached to the lower mold unit, and pushing a lower bead of the crude tire into a bead of the lower mold by utilizing the expansion forces of the bladder. With the bladder enclosed air-tightly, the tire lower bead can efficiently be pushed into the lower mold bead.
摘要:
A method and an apparatus for vulcanizing an elastomer product, such as automobile tires, wherein the elastomer product is placed in a vulcanizing chamber in a mold steam at an elevated pressure is supplied to the vulcanizing chamber to heat and pressurize the elastomer product until the elastomer product reaches a prespecified temperature or for a prespecified period of time, the steam supply is stopped and a pressurizing gas, at a pressure not lower than the steam supply pressure, is supplied to the vulcanizing chamber until the end of a heating period, said steam being blown in and supplied from an upper position of the center of the vulcanizing chamber in a horizontal direction or in an inclined downward direction, said steam being blown in and supplied from a lower position of the center of the vulcanizing chamber toward an upper region of the vulcanizing chamber. The method and apparatus prevent a large temperature difference within the elastomer product and provide uniform vulcanizing product uniformity, shortening of the vulcanizing time, improvement of productivity, and reduction of energy loss.
摘要:
A method for producing synthetic gas with which a virtually soot-free synthetic gas having a good composition can be efficiently obtained by a simple device using a liquid biofuel as the starting material, and it is thereby possible to produce a high-quality liquid fuel such as methanol, gasoline or kerosene. Steam and a liquid biofuel produced by pyrolysis of a biomass are fed to the gasification space inside a reactor tube that is not loaded with a catalyst inside the reactor tube and heated to 800 to 1,200° C. from the outside via the reactor tube walls to induce an endothermic reaction and thereby a steam reforming chemical reaction between the steam and the liquid biofuel. By setting the molar ratio of the fed steam and carbon in the liquid biofuel ([H2O]/[C]) at 0.3 or higher, a synthetic gas having a good composition that is virtually free of tar and soot and is primarily H2 and CO is obtained.
摘要:
A chassis structure used in a vehicle having a front, a left, a right, and a rear wheel, including: two front oblique beams disposed to sandwich the front wheel and extending from a central portion of the chassis structure respectively toward between the front wheel and the right wheel and toward between the front wheel and the left wheel such that distal end portions of the respective two front oblique beams are located on a right side and a left side of the front wheel, respectively; and two rear oblique beams disposed to sandwich the rear wheel and extending from the central portion respectively toward between the rear wheel and the right wheel and toward between the rear wheel and the left wheel such that distal end portions of the respective two rear oblique beams are located on a right side and a left side of the rear wheel, respectively.
摘要:
The present invention provides a resin composition which enables to obtain a transparent member having excellent transparency, high refractive index and high strength and an optical component composed of such a transparent member. A resin composition of the present invention comprises a polymerizable compound or a resin component and an organically modified fine particle produced in the presence of a high-temperature high-pressure water as a reaction field, in which an organic material is bonded to the surface of a metal fine particle.
摘要:
Provided is a production method for a porous alumina material, comprising the steps of: mixing an alkoxysilane solution that comprises an alkoxysilane, a mixed solvent comprising water and an alcohol, and an inorganic acid, with an aluminum solution comprising an aluminum compound and water, to prepare a mixed solution in which the aluminum compound and the alkoxysilane are dissolved in the mixed solvent; co-precipitating aluminum hydroxide with a silicon compound in the mixed solution, to form a precipitate; and baking the precipitate to form a porous alumina material comprising aluminum oxide and silicon oxide.
摘要:
The invention provides a polylactic acid-based resin having a high molecular weight, high heat resistance and an amide bond in its molecular chain, a production process and a use thereof. The polylactic acid-based resin comprises a constituting unit represented by the following formula (1) and which is obtained by allowing a polyisocyanate compound to react with a mixture comprising at least a poly (L-lactic acid) in which the percentage of the terminal functional group which is a carboxyl group exceeds 50% and a poly (D-lactic acid) in which the percentage of the terminal functional group which is a carboxyl group exceeds 50%. (in the formula (1), R is a polyisocyanate residue and represents an aliphatic hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group having an alicyclic structure and 3 to 20 carbon atoms or a hydrocarbon group having an aromatic ring and 6 to 20 carbon atoms.)