JP4793538B2 - Tire manufacturing method and apparatus therefor - Google Patents

Description

  The present invention supplies a plurality of rubber members to a tire molding drum, winds each rubber member around a predetermined position in the width direction and the radial direction of the tire to form a green tire, vulcanizes the green tire, and tires The present invention relates to a tire manufacturing method and an apparatus for manufacturing the tire.

  Conventionally, when vulcanizing green tires, the temperature of the vulcanizer mold containing the green tires is increased, and at the same time, a gas such as saturated steam is filled in a bladder or the like disposed inside the green tires. Heat is applied to the vulcanization.

  However, in such a vulcanization method, a difference in the degree of vulcanization occurs between the green tire surface portion close to the heat source such as a vulcanizer mold and a bladder and the green tire internal portion far from the heat source, Since the temperature of the heat source, the vulcanization time, and the like are set based on the degree of vulcanization inside the tire, there is a problem that the rubber physical properties are greatly deteriorated on the tire surface, particularly on the cap tread.

In order to solve this problem, conventionally, a heating device is arranged between the belt-shaped rubber member extrusion device and the molding drum, and the heating device heats the belt-shaped rubber member to a higher temperature in a portion where heat is not easily transmitted during vulcanization. There is known one in which a green tire is uniformly vulcanized by winding it around a molding drum (for example, see Patent Document 1).
JP-A-11-291363

  However, for example, when a rubber member at 100 ° C. is heated to 150 ° C., the rigidity of the rubber member is reduced to about ½ as shown in FIG.

  Therefore, in the conventional method, the rigidity of the rubber member is reduced by heating, and the belt-like rubber member is easily deformed and cannot maintain the desired shape, or the high temperature rubber member is vulcanized. There was a problem that rubber molecules were cut, rubber molecules were excessively bonded and hardened, and the rubber physical properties of the tire after vulcanization were lowered.

  Further, the temperature of the rubber member immediately after extrusion is already about 100 ° C., and by increasing the extrusion speed for improving productivity, friction heat is generated between the extrusion device and the temperature of the rubber member is further increased. There was also a problem that heating could not be performed.

  In view of the above problems, an object of the present invention is to provide a tire manufacturing method and apparatus for uniformly vulcanizing a green tire without reducing the rigidity of the rubber member or the rubber physical properties of the tire after vulcanization. That is.

  In order to achieve the above object, the present invention supplies a plurality of rubber members to a tire molding drum, winds each rubber member around a predetermined position in the width direction and the radial direction of the tire, and forms a green tire, In the tire manufacturing method for manufacturing a tire by vulcanizing a green tire, the rubber member so that the amount of heat received by the rubber member at each winding position before the vulcanization of the green tire becomes a value within an allowable range. A tire manufacturing method is proposed in which the tire is cooled to a predetermined temperature based on the winding position on the drum and then supplied to the drum.

  In order to achieve the above object, the present invention supplies a plurality of rubber members to a tire molding drum and winds each rubber member around a predetermined position in the width direction and the radial direction of the tire to form a green tire. In the tire manufacturing apparatus for manufacturing a tire by vulcanizing the green tire, the amount of heat received by the rubber member at each winding position by the end of the vulcanization of the green tire is a value within an allowable range. A tire manufacturing apparatus including a cooling device that cools a rubber member to a predetermined temperature based on a winding position on a drum and then supplies the rubber member to the drum is proposed.

  According to the present invention, the rubber member is heated to a predetermined temperature based on the winding position on the drum so that the amount of heat received by the rubber member at each winding position reaches a value within an allowable range by the end of vulcanization of the green tire. After being cooled, the amount of heat received by the rubber member at the winding position where the distance from the heat source during vulcanization differs, for example, the winding position different in the tire width direction or the tire radial direction, is substantially uniform. Thus, the temperature of each rubber member can be cooled.

  According to the present invention, each rubber member is provided so that the amount of heat received by the rubber member at the winding position where the distance from the heat source during vulcanization is different, for example, at the winding position where the distance is different in the tire width direction or the tire radial direction is substantially uniform. Thus, the green tire can be uniformly vulcanized without reducing the rigidity of the rubber member or the rubber physical properties of the tire after vulcanization.

  1 to 11 show a first embodiment of the present invention. FIG. 1 is a schematic side view showing a cooling device in the first embodiment of the present invention. FIG. 2 is a control block of the cooling device shown in FIG. FIG. 3, FIG. 3 is a view for explaining a green tire during vulcanization, FIG. 4 is a view showing a measurement result of heat history by vulcanization of the cap tread portion shown in FIG. 3, and FIG. 5 is a cap shown in FIG. FIG. 6 is a view for explaining the relationship between the tread portion and the rubber member, FIG. 6 is a view showing the measurement result of the heat history by vulcanization of the rubber member shown in FIG. 5, and FIG. 7 is the cooling time of the cooling device shown in FIG. The figure which shows the measurement result of the temperature of a rubber member, FIG. 8 is a figure which shows the relationship between the rubber member shown in FIG. 5, and preset temperature, FIG. 9 is the flowchart of the cooling device in 1st Embodiment of this invention, FIG. The schematic side view which shows the other example of the cooling device in 1st Embodiment of invention, FIG. Is a graph showing a measurement result of the thermal history in the first embodiment of the present invention.

  First, with reference to FIG. 1, the structure of the tire manufacturing apparatus in 1st Embodiment of this invention is demonstrated.

  In FIG. 1, reference numeral 10 denotes a known extruder, which extrudes a band-shaped rubber member W having a predetermined width and a predetermined thickness, for example.

  The rubber member W extruded from the extruder 10 is conveyed by a plurality of rollers 22 provided in the cooling device 20.

  The cooling device 20 is divided into five sections 20a to 20e, and each section 20a to 20e is set to a predetermined temperature (hereinafter referred to as a cooling temperature), for example, the rubber member W conveyed at a high temperature is air-cooled. It comes to cool by. Thereby, the rigidity of the rubber member W is not lowered, and the rubber physical properties of the tire after vulcanization are not lowered.

  Although it is preferable to cool the rubber member W being conveyed uniformly, the rubber member W may be cooled in the width direction of the rubber member (from the front to the back in FIG. 1).

  Each roller 22 is provided so that the conveyance distances of the sections 20a to 20e are equal, and is rotated at a speed substantially equal to the supply speed of the rubber member W.

  The rubber member W cooled by the cooling device 20 is wound around a predetermined winding position of the drum 33 that rotates in a predetermined direction (clockwise in FIG. 1) while being pressed by the pressing rollers 31 and 32. The pressing rollers 31, 32 or the drum 33 are arranged in a predetermined direction according to the winding position of the rubber member W, for example, the width direction of the drum 33 (from the front to the back in FIG. 1) or the radial direction of the drum 33 (FIG. 1). It is preferable that it can be moved in the vertical direction or horizontal direction).

  The drum 33 is a well-known molding drum that is driven by a drive source (not shown) such as a motor, and has a cylindrical shape that can expand and contract in the radial direction according to the type of tire to be manufactured.

  Thus, a plurality of rubber members W are wound around the drum 33 to form a green tire, and the tire is manufactured by vulcanizing the green tire with a vulcanizer (not shown).

  Next, control of the cooling device according to the first embodiment of the present invention will be described with reference to FIGS.

  The cooling device 20 includes a cooling unit 21, a roller drive unit 23, a storage unit 24, and a control unit 25.

  The control unit 25 determines the operation of the cooling device 20, and is connected to the extruder 10, the cooling unit 21, the roller driving unit 23, and the storage unit 24.

  The control unit 25 includes a known microcomputer including a CPU, a RAM, a ROM, and the like. Based on information acquired from the extruder 10 and information stored in the storage unit 24, the cooling unit 21, the roller driving unit 23, and the like. It is designed to control the operation.

  The information acquired from the extruder 10 includes the identification number, supply speed, temperature, and the like of the rubber member W. These information may be received from the extruder 10 or detected by a sensor or the like (not shown). Anyway. Further, information on the rubber member W may be transmitted in advance from a production management system or the like, and the control unit 25 may store the information in the storage unit 24 and read it out as necessary.

  The cooling unit 21 includes a first cooling unit 21a that cools the section 20a, a second cooling unit 21b that cools the section 20b, a third cooling unit 21c that cools the section 20c, and a fourth cooling unit that cools the section 20d. 21d and the 5th cooling part 21e which cools the section 20e, each cooling part 21a-21e is a well-known cooler which cools the air of each section 20a-20e, and circulates a low-temperature refrigerant with a compressor It consists of refrigeration equipment.

  The roller drive unit 23 includes a known drive source such as a motor that drives each roller 22, and rotates each roller 22 based on the supply speed of the extruder 10.

  The storage unit 24 includes a known storage device such as a hard disk device or a magnetic tape device, and is read or written by the control unit 25 and received by the rubber member W at each winding position by the end of vulcanization of the green tire. Information for supplying to the drum 33 is stored after the rubber member W is cooled to a predetermined temperature based on the winding position around the drum 33 so that the amount of heat becomes a value within an allowable range. .

  In general, the green tire 1 during vulcanization is heated from the surface of the green tire 1 by a heat source H1 such as a vulcanizer mold as shown in FIG. 3, and from the inside of the green tire 1 by a heat source H2 such as a bladder. It is vulcanized by heating.

  As a result, in the tire after vulcanization, a difference in the degree of vulcanization occurs in positions where the distances from the heat sources H1, H2 are different, for example, in the tire width direction or the tire radial direction, and particularly in the shoulder portion of the cap tread 2. Met.

  Here, as an index indicating the degree of vulcanization of the green tire 1, a thermal history that is a temperature change on the time axis is considered. For example, the thermal history due to vulcanization of the green tire 1 is represented by a temperature change during the vulcanization time. Hereinafter, unless otherwise specified, the thermal history is vulcanization time × temperature difference.

  In order to analyze the thermal history inside the green tire 1 during vulcanization, using the simulation by the finite element method, from the inside of the green tire 1 toward the surface of the green tire 1 in the thickest part 2a of the cap tread 2 When the x-axis is taken and the heat history by vulcanization is expressed with the value of the surface of the green tire 1 being 100, it was found that a maximum difference of 23% occurred as shown in FIG.

  Further, as shown in FIG. 5, a belt-like rubber member W1 to W4 having a width L1 and a thickness L2 extruded from the extruder 10 is sequentially wound around a predetermined winding position of the drum 33 to constitute a portion 2a of the cap tread 2. When the thermal history of each rubber member W1 to W4 by vulcanization was measured, the same result as the simulation was obtained as shown in FIG.

  In order to make the degree of vulcanization uniform, the control unit 25 makes each heat history of the portion 2a of the cap tread 2 uniform based on the heat history of the rubber members W1 to W4 by vulcanization shown in FIG. A temperature at which the rubber members W1 to W4 are wound around a predetermined winding position of the drum 33 corresponding to the tire width direction and the tire radial direction (hereinafter referred to as a set temperature) is calculated.

  Since the temperature of the rubber members W1 to W4 may change due to the heat of the drum 33, the heat of the other rubber members W1 to W4, etc., after being wound around the drum 33, the heat generated by vulcanization In addition to the history, the thermal history of the portion 2a of the cap tread 2 based on the measurement result of the temperature change of each rubber member W1 to W4 in each time from winding the rubber members W1 to W4 around the drum 33 to vulcanization Alternatively, the set temperatures of the rubber members W1 to W4 may be calculated so as to be uniform.

  The storage unit 24 stores the measurement results of the thermal history of the rubber members W1 to W4 by vulcanization shown in FIG. 6 and the measurement results of the cooling time of the cooling unit 21 and the temperatures of the rubber members W1 to W4 shown in FIG. The set temperature of each rubber member W1 to W4 calculated by the control unit 25 is stored.

  Next, the operation of the cooling device according to the first embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, as an example, the belt-like rubber members W1 to W4 extruded from the extruder 10 have a width L1 = 10 mm, a thickness L2 = 1 mm, and the rubber members W1 to W4 immediately after being extruded have a temperature of 120 ° C. and a supply speed. It is assumed that the conveyance distances of 100 m / min, the sections 20a to 20e are all set to 0.5 m, and the cooling temperatures of the cooling units 21a to 21e are all set to 20 ° C. Further, as shown in FIG. 8, the set temperatures of the rubber members W1 to W4 are calculated as 90 ° C. for the rubber member W1, 100 ° C. for the rubber member W2, 90 ° C. for the rubber member W3, and 40 ° C. for the rubber member W4. It shall be.

  As shown in FIG. 9, the control part 25 receives the information of the rubber members W1-W4 extruded from the extruder 10 (S101). Here, temperature, supply speed, identification number, etc. are received as information on the rubber members W1 to W4. In addition, when the information of the rubber members W1-W4 supplied beforehand is received as mentioned above, the process of S101 becomes unnecessary.

  The control unit 25 reads the set temperatures of the rubber members W1 to W4 corresponding to the received identification number from the storage unit 24 (S102). Here, the set temperatures of the rubber members W1 to W4 shown in FIG. 8 are read.

  And the control part 25 sets cooling time based on the temperature of the rubber members W1-W4 extruded from the extruder 10, and the read preset temperature (S103). Here, for example, when the rubber member W4 at 120 ° C. is cooled to the set temperature of 40 ° C., the cooling time is 1.5 seconds from the measurement results of the cooling time at the cooling temperature of 20 ° C. and the temperatures of the rubber members W1 to W4 shown in FIG. It becomes.

  The controller 25 controls ON / OFF of the switches of the respective cooling units 21a to 21e in order to cool the rubber members W1 to W4 to the set temperature (S104).

  In the case of the above example, since the supply speed of the rubber members W1 to W4, that is, the conveyance speed in the cooling device 20 is 100 m / min, the rubber member W4 is conveyed 2.5 m in the cooling device 20 during the cooling time of 1.5 seconds. Since the conveyance distance of each section 20a to 20e is 0.5 m, the rubber member W4 is set to a set temperature of 40 ° C. when the rubber member W4 is wound around the drum 33 by turning on all the switches of the cooling units 21a to 21e. Can be cooled.

  The controller 25 repeats the processing of S101 to S104 for each of the rubber members W1 to W4 extruded from the extruder 10, whereby the rubber members W1 to W4 are sequentially wound around the predetermined winding position of the drum 33, and FIG. As shown in FIG. 2, the portion 2a of the cap tread 2 can be configured.

  Here, the switches of the cooling units 21a to 21e are turned on / off according to the cooling time. However, as shown in FIG. 10, a plurality of fixed rollers 26 can be moved in the vertical direction instead of the cooling device 20. Using the cooling device 20A including a plurality of movable rollers 27, the movable rollers 27 in the respective sections 20a to 20e may be moved according to the cooling time to change the transport distances in the respective sections 20a to 20e.

  In this embodiment, the cooling time is set to 20 ° C. and the cooling time is set. However, both the cooling temperature and the cooling temperature may be set.

  For example, when the 120 ° C. rubber member W2 is cooled to the set temperature 100 ° C., the cooling temperature is set to 20 ° C., and the cooling time at the cooling temperature 20 ° C. and the temperature measurement results of the rubber members W1 to W4 shown in FIG. The time is 0.5 seconds. During the cooling time, the rubber member W2 is conveyed about 0.8 m in the cooling device 20, and the first cooling unit 21a and the second cooling unit 21b are switched on. When the rubber member W2 is wound around the drum 33, it is difficult to cool the rubber member W2 to a set temperature of 100 ° C.

  However, from the measurement results of the cooling time and the temperature of the rubber members W1 to W4 shown in FIG. 7, the cooling temperature is set to “no cooling”, the cooling time is set to 1.5 seconds, and all the switches of the respective cooling units 21a to 21e are turned off. Thus, when the rubber member W2 is wound around the drum 33, the rubber member W2 can be cooled so as to have a set temperature of 100 ° C. Thereby, the rubber members W1 to W4 can be accurately cooled at the set temperature.

  The rubber members W1 to W4 cooled to the set temperature are wound around a predetermined winding position of the drum 33 to form the green tire 1, and the green tire 1 is vulcanized by a vulcanizer (not shown) so that the cap tread 2 When the heat history by vulcanization is expressed with the value of the surface of the green tire 1 being 100 in the portion 2a, the difference is improved from a maximum of 23% to a difference of 3% as shown in FIG. As a result, the heat history of the rubber members W1 to W4 of the portion 2a of the cap tread 2 can be set within a permissible range during the vulcanization time of the green tire 1, and the heat history of the portion 2a of the cap tread 2 can be substantially reduced. It can be made uniform.

  In the present embodiment, the portion 2a of the cap tread 2 has been described. However, the present invention is not limited to this. The same result can be obtained when a plurality of different types of rubber members W1 to W4 such as an inner liner, a carcass, and a belt constituting the tire are cooled around a predetermined winding position and then wound around the drum 33.

  Further, the rubber member W1 may be a belt-like rubber member having a small width L1 and a small thickness L2 in order to finely set the set temperatures of the rubber members W1 to W4 based on predetermined winding positions corresponding to the tire width direction and the tire radial direction. Although the sheet-like rubber members W1 to W4 are cooled and wound around the drum 33, for example, similar results can be obtained.

  In this embodiment, the thermal history is the vulcanization time × temperature difference. However, since the thermal history is a temperature change on the time axis, the thermal history is more accurately calculated as the time integration of the temperature change, or the time / mass / specific heat. The same result can be obtained by assuming that the heat history is simply the heat quantity.

  As described above, according to the above configuration and operation, the rubber members W1 to W4 are set such that the amount of heat received by the rubber members W1 to W4 at the respective winding positions before the vulcanization of the green tire 1 becomes a value within an allowable range. Is cooled to a predetermined temperature based on the winding position on the drum 33, and then supplied to the drum 33, so that the winding positions at different distances from the heat sources H1, H2 at the time of vulcanization, for example, the tire width direction or the tire radius Since the temperature of each of the rubber members W1 to W4 can be cooled so that the amount of heat received by the rubber member at different winding positions in the direction can be substantially uniform, the rigidity of the rubber members W1 to W4 can be lowered or vulcanized. The green tire 1 can be uniformly vulcanized without deteriorating the rubber physical properties of the tire.

  Further, based on the vulcanization time of the green tire 1 and the temperature changes of the rubber members W1 to W4 during the vulcanization time, the set temperatures of the rubber members W1 to W4 so that the thermal history of the green tire 1 is uniform. And the rubber members W1 to W4 supplied to the drum 33 are cooled to the set temperature, so that the heat history by vulcanization can be made uniform, so that the green tire 1 can be vulcanized accurately and uniformly. Can do.

  Further, the heat of the green tire 1 is determined based on each time from when the rubber members W1 to W4 are wound around the drum 33 to the end of vulcanization of the green tire 1 and the temperature change of each rubber member W1 to W4 at each time. By calculating the set temperature of each rubber member W1 to W4 so that the history becomes uniform and cooling the rubber members W1 to W4 supplied to the drum 33 to the set temperature, each rubber member W1 to W4 is made to the drum 33. Considering the temperature change of each time from winding to vulcanization, the heat history by vulcanization can be made uniform, so that the green tire 1 can be vulcanized more accurately and uniformly.

  Further, based on the temperature of the rubber members W1 to W4 supplied to the drum 33 and the set temperature, the cooling unit 21 is set so that the rubber members W1 to W4 are set to the set temperature when the rubber members W1 to W4 are wound around the drum 33. By setting the cooling time, the rubber members W1 to W4 can be cooled to the set temperature only by control based on the cooling time without changing the cooling temperature of the cooling unit 21.

  Moreover, the cap tread can be uniformly vulcanized by including at least one cap tread as the plurality of rubber members W1 to W4.

  Further, by including at least one belt-like rubber member as the plurality of rubber members W1 to W4, the set temperature of the rubber members W1 to W4 can be set finely.

  Next, a second embodiment of the present invention will be described.

  12 is a schematic side view showing a cooling device according to a second embodiment of the present invention, FIG. 13 is a control block diagram of the cooling device shown in FIG. 12, and FIG. 14 is a cooling time and rubber member of the cooling device shown in FIG. FIG. 15 is a flowchart of the cooling device in the second embodiment of the present invention.

  In the figure, the same components and the same operation parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  The second embodiment is different from the first embodiment in that a cooling device 40 is used instead of the cooling device 20.

  As shown in FIG. 12, the rubber member W pushed out from the extruder 10 is wound around a predetermined winding position of the cooling drum 43 while being pressed by a pressing roller 41 movable in the vertical direction.

  The cooling drum 43 is configured to cool the cooling drum main body, for example, by circulating a low-temperature refrigerant through a refrigerant flow path provided in the cooling drum main body.

  The cooling drum 43 that rotates at a speed substantially equal to the supply speed of the rubber member W in a predetermined direction (counterclockwise in FIG. 12) by a drive source (not shown) such as a motor is set to a predetermined temperature (hereinafter referred to as a cooling temperature). Thus, the wound rubber member W is cooled.

  Further, the rubber member W wound around the circumference of the cooling drum 43 by a predetermined distance is supplied to the drum 33 by pressing rollers 41 and 42 that can move in the vertical direction. Any one of the pressing rollers 41 and 42 only needs to be movable in the vertical direction.

  Next, control of the tire manufacturing apparatus according to the second embodiment of the present invention will be described with reference to FIGS. 13 and 14.

  The cooling device 40 includes a storage unit 44, a control unit 45, a refrigerant circuit 46, a cooling drum driving unit 47, and a pressing roller driving unit 48.

  The refrigerant circuit 46 is composed of a well-known refrigeration device, is connected to the refrigerant flow path of the cooling drum body, and cools the cooling drum body by a control signal from the control unit 45.

  The cooling drum drive unit 47 includes a known drive source such as a motor for driving the cooling drum 43, and rotates the cooling drum 43 in a predetermined direction based on the supply speed of the extruder 10.

  The pressing roller driving unit 48 moves the pressing rollers 41 and 42 in the vertical direction according to a control signal from the control unit 45.

  Moreover, the memory | storage part 44 has memorize | stored about the measurement result of the cooling time of the cooling device 40, and the temperature of the rubber members W1-W4 as shown in FIG.

  Next, the operation of the cooling device in the second embodiment of the present invention will be described with reference to FIG.

  In this embodiment, as in the first embodiment, the belt-like rubber members W1 to W4 extruded from the extruder 10 have a width L1 = 10 mm, a thickness L2 = 1 mm, and the rubber members W1 to W4 immediately after being extruded have a temperature of 120. It is assumed that the temperature is set to 100 ° C. and the supply speed is 100 m / min, and the set temperatures of the rubber members W1 to W4 are calculated as shown in FIG.

  The cooling drum 43 has a diameter of 1.3 m, and the pressing rollers 41 and 42 are fixed at positions where the rubber members W1 to W4 are wound around the circumference of the cooling drum 43 by a half.

  As shown in FIG. 15, the controller 45 sets the cooling temperature based on the supply speed of the rubber members W1 to W4 extruded from the extruder 10 to the drum 33 and the read set temperature (S103A). In this embodiment, the cooling time of the rubber members W1 to W4 is 1.2 seconds. For example, when the rubber member W2 is set to a set temperature of 90 ° C., from the measurement results of the cooling time and the temperature of the rubber member shown in FIG. The cooling temperature is 80 ° C. Further, when the rubber member W4 is set to a set temperature of 40 ° C., the cooling temperature is 10 ° C.

  The controller 45 controls the cooling temperature of the refrigerant circuit 46 in order to cool the rubber members W1 to W4 to the set temperature (S104A).

  The controller 45 repeats the processing of S101 to S104A for each of the rubber members W1 to W4 extruded from the extruder 10, whereby the rubber members W1 to W4 are sequentially wound around the predetermined winding position of the drum 33.

  In this embodiment, the pressing rollers 41 and 42 are fixed to fix the cooling time and the cooling temperature is set.However, the pressing rollers 41 and 42 are moved in the vertical direction so that the cooling temperature and Both of the cooling temperatures may be set as in the first embodiment.

  As described above, according to the above configuration and operation, the rubber members W1 to W4 are attached to the drum 33 based on the supply speed of the rubber members W1 to W4 to the drum 33 and the set temperature in addition to the operations and effects of the first embodiment. By setting the cooling temperature of the refrigerant circuit 46 so that the rubber members W1 to W4 are set to a set temperature when winding the rubber members W1 to W4, the rubber members W1 to W4 are controlled only by the cooling temperature without changing the cooling time of the cooling drum 43. Can be cooled to a set temperature.

  In addition, you may comprise the apparatus which combined the structure or operation | movement of said each embodiment, or replaced some structural parts.

  Further, the configuration of the present invention is not limited to the above embodiment, and various modifications may be made without departing from the scope of the present invention.

The schematic side view which shows the cooling device in 1st Embodiment of this invention The schematic plan view of the tire conveying apparatus in 1st Embodiment of this invention. Control block diagram of the cooling device shown in FIG. Diagram explaining the tire during vulcanization The figure which shows the measurement result of the heat history by the vulcanization | cure of the part of the cap tread shown in FIG. The figure explaining the relationship between the part of the cap tread shown in FIG. 3, and a rubber member The figure which shows the measurement result of the heat history by vulcanization | cure of the rubber member shown in FIG. The figure which shows the measurement result of the cooling time of the cooling device shown in FIG. 1, and the temperature of a rubber member The figure which shows the relationship between the rubber member shown in FIG. 5, and preset temperature The flowchart of the cooling device in the first embodiment of the present invention. The schematic side view which shows the other example of the cooling device in 1st Embodiment of this invention. The figure which shows the measurement result of the heat history in 1st Embodiment of this invention. The schematic side view which shows the cooling device in 2nd Embodiment of this invention. Control block diagram of the cooling apparatus shown in FIG. The figure which shows the measurement result of the cooling time of the cooling device shown in FIG. 12, and the temperature of a rubber member The flowchart of the cooling device in 2nd Embodiment of this invention Diagram showing the relationship between temperature and strength of rubber members

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Green tire, 2 ... Cap tread, 2a ... part, 10 ... Extruder, 20,20A ... Cooling device, 20a-20e ... Section, 21 ... Cooling part, 21a ... First cooling part, 21b ... Second cooling part , 21c: third cooling unit, 21d: fourth cooling unit, 21e: fifth cooling unit, 22: roller, 23 ... roller driving unit, 24 ... storage unit, 25 ... control unit, 26 ... fixed roller, 27 ... movable Roller, 31, 32 ... Pressing roller, 33 ... Drum, 40 ... Cooling device, 41,42 ... Pressing roller, 43 ... Cooling drum, 44 ... Storage unit, 45 ... Control unit, 46 ... Refrigerant circuit, 47 ... Cooling drum drive 48, pressing roller driving section, H1, H2 ... heat source, L1, width, L2, thickness, W, W1-W4, rubber members.

Claims (14)

A plurality of rubber members are supplied to a tire-forming drum, the rubber members are wound around predetermined positions in the width direction and the radial direction of the tire to form a green tire, and the green tire is vulcanized to produce a tire. In the tire manufacturing method,
After the rubber member is cooled to a predetermined temperature based on the winding position on the drum so that the amount of heat received by the rubber member at each winding position becomes a value within an allowable range by the end of vulcanization of the green tire. The tire manufacturing method, wherein the drum is supplied to the drum. Based on the vulcanization time of the green tire and the temperature change of each rubber member during the vulcanization time, the set temperature of each rubber member is calculated so that the thermal history of the green tire is uniform, and the drum The tire manufacturing method according to claim 1, wherein the rubber member supplied to is cooled to the set temperature. The thermal history of the green tire is made uniform based on each time from when each rubber member is wound around the drum to when the vulcanization of the green tire is completed and the temperature change of each rubber member at each time. The tire manufacturing method according to claim 1, further comprising: calculating a set temperature of each rubber member and cooling the rubber member supplied to the drum to the set temperature. The cooling temperature is set based on the supply speed of the rubber member to the drum and the set temperature so that the rubber member becomes the set temperature when the rubber member is wound around the drum. Item 4. The tire manufacturing method according to Item 2 or 3. Based on the temperature of the rubber member supplied to the drum and the set temperature, means for setting a cooling time so that the rubber member reaches the set temperature when the rubber member is wound around the drum. The tire manufacturing method according to any one of claims 2 to 4, wherein: The tire manufacturing method according to claim 1, wherein at least one cap tread is included as the plurality of rubber members. The tire manufacturing method according to claim 1, wherein the plurality of rubber members include at least one belt-like rubber member. A plurality of rubber members are supplied to a tire-forming drum, the rubber members are wound around predetermined positions in the width direction and the radial direction of the tire to form a green tire, and the green tire is vulcanized to produce a tire. In tire manufacturing equipment,
After the rubber member is cooled to a predetermined temperature based on the winding position on the drum so that the amount of heat received by the rubber member at each winding position becomes a value within an allowable range by the end of vulcanization of the green tire. A tire manufacturing apparatus comprising: a cooling device that supplies the drum. The cooling device is
Cooling means for cooling the rubber member supplied to the drum to a predetermined set temperature;
Cooling control means for controlling the cooling means,
The cooling control means includes
Means for calculating the set temperature of each rubber member based on the vulcanization time of the green tire and the temperature change of each rubber member during the vulcanization time so that the thermal history of the green tire is uniform; ,
The tire manufacturing apparatus according to claim 8, further comprising a unit that controls the cooling unit so that a rubber member supplied to the drum reaches the set temperature. The cooling device is
Cooling means for cooling the rubber member supplied to the drum to a predetermined temperature;
Cooling control means for controlling the cooling means,
The cooling control means includes
The thermal history of the green tire is made uniform based on each time from when each rubber member is wound around the drum to when the vulcanization of the green tire is completed and the temperature change of each rubber member at each time. Means for calculating a set temperature of each rubber member;
The tire manufacturing apparatus according to claim 8, further comprising a unit that controls the cooling unit so that a rubber member supplied to the drum reaches the set temperature. The cooling control means includes
Based on the supply speed of the rubber member to the drum and the set temperature, means for setting the cooling temperature of the cooling means so that the rubber member becomes the set temperature when the rubber member is wound around the drum. The tire manufacturing apparatus according to claim 9, wherein the tire manufacturing apparatus includes: The cooling control means includes
Based on the temperature of the rubber member supplied to the drum and the set temperature, means for setting the cooling time of the cooling means so that the rubber member reaches the set temperature when the rubber member is wound around the drum The tire manufacturing apparatus according to claim 9, wherein the tire manufacturing apparatus includes: The tire manufacturing apparatus according to claim 8, wherein the plurality of rubber members include at least one cap tread. The tire manufacturing apparatus according to any one of claims 8 to 13, wherein the plurality of rubber members include at least one belt-like rubber member.

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