摘要:
In a vulcanizing system of the present invention, a temperature booster 35 and a pressure booster 37 are provided on a steam supply path 40 connecting vulcanizers 10a to 10h that belong to groups and a boiler 30 allocated to the groups. The temperature booster 35 and the pressure booster 37 are sequentially arranged from an upstream side, a second branch supply path 43 for supplying the steam to a mold between the temperature booster 35 and the pressure booster 37 is branched from the steam supply path 40. The second branch supply path 43 is preferably in a form of allowing the steam temperature-boosted by the temperature booster 35 to be supplied to the mold by bypassing the pressure booster 37.
摘要:
In a tire vulcanizer (1) having two sets of portions, each of which includes a lower mold (2), an upper mold (3), and a center mechanism (4L, 4R) provided with a bladder (B), a nitrogen gas heated in a first heating device (11) is supplied to an interior of the bladder of the center mechanism (4L) which is placed on the upstream side in the circulating direction of the nitrogen gas. The nitrogen gas discharged from the interior of the bladder of the center mechanism (4L) is used for vulcanization and patterning and a temperature thereof is lowered. However, this nitrogen gas is heated again in a second heating device (31), so that the temperature is increased. Therefore, the nitrogen gas heated in the second heating device (31), is supplied to an interior of the bladder of the center mechanism (4R) which is placed on the downstream side in the circulating direction of the nitrogen gas.
摘要:
A method for controlling the discharge of fluids during a process for vulcanization and molding of a green tire (2) comprises the steps of : building at least one portion of a radially internal surface (10) of a green tire (2) by winding of a continuous elongated element (9) of elastomeric material into a plurality of coils (9a) confining circumferential grooves (11) along the rolling direction of the tire; disposing the circumferential grooves (11) into fluid communication with discharge channels present in the radially external surface (18) of a pressing bladder (16) disposed in a radially internal cavity (12) bounded by the green tire (2).
摘要:
A method for curing a rubber article including maintaining a measured curing temperature between a high temperature limit (TH) and a low temperature limit (TL). The TH TL are derived from high and low temperature curing curves respectively. Other steps may include obtaining a curing target Al or A2, wherein Al and A2 are areas between the high temperature curing curve and a base temperature (TB) and the low temperature curing curve respectively wherein TB is selected to make Al and A2 within at least 10 % of each other and determining an area under a measured curing curve, the area under the measured curing curve being between the measured curing curve and the TB, wherein the measured curing curve is defined as a plot of the measured curing temperature over time.
摘要:
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. The tire vulcanizing apparatus has: a medium path, connected to an internal space of a raw tire, for passing a heating and pressurizing medium; a pressure sensor, provided in the medium path, for measuring a pressure of the heating and pressurizing medium; a pressure control valve for controlling a pressure of the heating and pressurizing medium passing through the medium path on the basis of a signal from the pressure sensor; a temperature sensor, provided in the medium path, for measuring a temperature of the heating and pressurizing medium; and a heating unit for controlling the temperature of the heating and pressurizing medium passing through the medium path on the basis of a signal from the temperature sensor, wherein the pressure control valve and the heating unit control the pressure and temperature of the heating and pressurizing medium supplied from the medium path to the internal space of the raw tire respectively and independently.
摘要:
An automatic pressure and temperature control apparatus and method for use in curing tire assemblies (50) including retread tire assemblies is provided. Using water as a heating medium, a new process control method and apparatus utilize an expansion tank if the measured water pressure is below a set-point pressure, allowing a more precise control of process variables during steady state conditions such that heat transfer is improved and the undesirable formation of steam is eliminated. Existing processes and equipment for curing tire assemblies can be modified, using the teaching disclosed herein, to implement and achieve the benefits of the present invention.