JP4450684B2 - Tire molding system - Google Patents

Description

  The present invention relates to an improvement in a tire molding system in which a continuous ribbon is wound to form a rubber member.

  Conventionally, a continuous rubber ribbon extruded from a small extruder is directly rotated when molding a tire to reduce the size of the extrusion equipment, improve the uniformity of the tire, or handle small lot multi-size production. A tire molding method is known in which a rubber member having a predetermined cross section is formed by winding around a tire in the middle of molding to form a rubber member (see, for example, Patent Document 1).

  FIG. 1 is a schematic view showing a method of forming a rubber member using a continuous rubber ribbon, and FIG. 2 is a cross-sectional view of the rubber member being formed by this method corresponding to II-II in FIG. It is a schematic diagram shown in FIG. This tire molding method is to directly extrude the continuous rubber ribbon 91 from the extruder 93 and guide it directly onto the tire 92 in the middle of molding, and rotate the tire 92 while pressing the continuous rubber ribbon 91 against the tire 92 using the affixing roller 94. A continuous rubber ribbon 91 is wound around a tire 92 to form a rubber member 95.

  On the other hand, as a system for molding tires, each work station for assembling them is provided for each tire constituent member or for each group in which tire constituent members are grouped, and a molding carriage equipped with a molding drum is provided between these work stations. There is known a tire molding system that moves and sequentially assembles respective tire constituent members on a molding drum to complete a raw tire (see, for example, Patent Document 2).

  FIG. 3 is a conceptual diagram showing a part of such a tire molding system. In the tire molding system 80, the tire constituent members a and b1 are assembled at the station S1, and the materials of these tire constituent members a are used. A member supply device A for supplying and a member supply device B for supplying the material of the tire constituent member b1 are disposed in the station S1. Similarly, a member supply device C corresponding to the tire constituent member c is provided at the station S2, and member supply devices D and B corresponding to the tire constituent members d and b2 are provided at the station S3.

  The tire molding system 80 is configured such that a plurality of molding carriages 82 on which molding drums 81 are mounted sequentially move between these work stations S1 to S3, and tire components are assembled at these work stations S1 to S3. In this case, the molding drum 81 mounted on the molding carriage 82 moved from another work station is stopped at the station S1, the tire constituent members a and b1 are assembled thereon, and then the molding drum 81 is moved to the station S2. Then, the tire constituent member c is assembled, and then the molding drum 81 is moved to the station S3, the tire constituent members a and b2 are assembled, and then the molding drum 81 is moved to another work station.

  Here, although the tire constituent members b1 and b2 are different in cross-sectional shape, they can be formed by winding the same continuous rubber ribbon made of the same rubber material. Provided in both of S3. Further, the tire constituent members b1 and b2 each have a small amount of rubber member, and therefore the time required for the assembly is sufficiently short with respect to the tact time at each station. As a typical example of the tire constituent member having such characteristics, rubber can be cited while being disposed between the layers of the main tire constituent member.

  Thus, in the conventional tire molding system 80, the member supply device B for the tire constituent members b1 and b2 is provided in both the work stations S1 and S3, and the operation rate is high. This is a problem because the equipment cost is wasted.

As another example, only one of these tire constituent members b1 and b2 that differ only in cross-sectional shape is assembled, and which one is assembled may depend on the size to be molded. As another example, the tire components b1 and b2 are actually the same member, but the order in which they are assembled may differ depending on the size. In these cases, both work stations S1, The member supply device B is arranged in both S3 and is configured to be able to cope with any size, but since the member supply device B operates only one of them, the operation rate is low. Was wasted.
JP 2002-115714 A International Publication WO 01/39963 Pamphlet

  This invention is made | formed in view of such a problem, and it aims at providing the tire shaping | molding system which can reduce the installation cost of the ribbon supply apparatus which forms a rubber member.

<1> The present invention includes a plurality of work stations for assembling a tire constituent member including a rubber member, and among these, two or more work stations provide a ribbon supply device that supplies a continuous rubber ribbon on the periphery of a molding drum or core. In the tire molding system configured to assemble the rubber member using,
At least one ribbon supply device is configured such that the rubber member can be assembled at the two or more work stations, and ribbon supply device moving means for moving the ribbon supply device between the work stations is provided. This is a tire molding system.

  <2> The present invention includes, in <1>, a plurality of molding carts that rotatably support the molding drum or core, and the molding carts are moved endlessly or endlessly between the plurality of work stations. This is a tire molding system having a track.

<3> The present invention is the system for molding a tire for a motorcycle according to <1>,
As the work station, there is provided a ribbon supply device for arranging a first molding station for expanding a carcass band in a toroidal shape and a second molding station for assembling a belt and a tread rubber, and supplying a continuous rubber ribbon for the tread rubber. The ribbon supply device is configured so that the tread rubber can be assembled at any one of the first molding station and the second molding station, and the ribbon supply device is configured with the first molding station and the second molding station. This is a tire molding system provided with a ribbon supply device moving means for moving between the molding stations.

  According to the invention of <1>, at least one ribbon supply device is configured so that the rubber member can be assembled at the two or more work stations, and the ribbon supply device is moved between the work stations. Ribbon supply device moving means is provided, so it is possible to complete one set of ribbon supply devices that have been required more than two types in the past, increase the operation rate of the ribbon supply device, reduce the equipment cost, especially these work When the ribbon winding time at the station is short or the ribbon winding is not performed at both work stations at the same time, the effect of the present invention becomes more remarkable.

  According to the invention of <2>, a plurality of molding carts that rotatably support the molding drum or core are provided, and an endless or endless track for moving these molding carts between the plurality of work stations is provided. Therefore, a series of operations for molding one tire can be divided at a plurality of stations, and the tire can be molded efficiently and efficiently.

  The effects of the invention <3> are as follows. As a structure of a radial tire for a motorcycle, a belt is composed of two belt layers inclined in opposite directions with respect to the tire equatorial plane, and instead of these belt layers or in addition to these belt layers. Some tires have a spiral layer in which a cord is spirally wound in the tire circumferential direction, and the former structure without a spiral layer usually has a belt and a tread rubber for efficient production. Are pre-assembled at the second molding station to form a belt-tread band having a flat cross section, and the belt tread band is transferred to the first molding station holding the folded carcass band around the bead core. After placing the band radially outward, the carcass band bulges in a toroidal shape and the carcass band and belt tread band The tire is molded by a so-called two-station method in which the belt is deformed into a circular arc shape, and in the latter structure having a spiral layer, the spiral layer once formed into a flat plate shape is Since it cannot be deformed into an arc shape, the tire is molded by assembling all members including the tread rubber at the first station.

  And in any system, after assembling the belt, the rubber ribbon is spirally wound to assemble the tread rubber. This rubber ribbon winding method has a feature that a plurality of sizes having different tread rubber cross-sections can be continuously mixed and produced without requiring time for size switching. It is preferable to produce a mixed flow with no tires indistinguishable. For this reason, conventionally, a rubber ribbon feeder is provided in both the first molding station and the second molding station.

  According to the invention <3>, the ribbon supply device is configured such that the tread rubber can be assembled at any of the first molding station and the second molding station, and the ribbon supply device is Since the ribbon feeding device moving means for moving between the one molding station and the second molding station is provided, it can be completed with one ribbon feeding device, and a tire having a spiral layer and a tire having no spiral layer can be used. Both can be mixed and produced.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 4 is a layout diagram illustrating a carcass band molding system that molds a carcass band as the tire molding system of the first embodiment. The carcass band molding system 10 has a work station of ST1 to ST3 and a plurality of (four in the figure) molding carts that move along the endless track 3 between these work stations ST1 to ST3 at a predetermined tact time. Each molding carriage 2 is equipped with a tire molding drum 1 for assembling tire constituent members of a predetermined type for each station on the circumference.

  The work station ST1 is provided with an inner liner rubber assembling device 4 for assembling the inner liner rubber IL on the tire molding drum 1, and a canvas chafer assembling device 5 for assembling the right and left canvas chafer CCH. The station ST2 is provided with a carcass ply assembling apparatus 8 for assembling the carcass ply C on the molding drum 1, and the work station ST3 is provided with a preset bead PB in which a bead core B and a bead filler F are preset, and a bead stock. A bead handling robot 11 that is taken out from 9 and supplied to the molding drum 1 is disposed.

  Also provided are a ribbon supply device 6 for assembling the rubbers M1R, M1L and M2 by winding a rubber ribbon, and a ribbon supply device moving means 7 for reciprocally displacing the ribbon supply device 6 between the work stations ST1 and ST2.

  FIG. 5 is a schematic view showing a cross section of a tire for explaining a procedure for forming a carcass band. After an empty molding drum 1 is arranged at the work station ST1, an inner liner rubber IL is used as an inner liner rubber. The left and right canvas chafers CCH are assembled to the outer side in the radial direction of the inner liner rubber IL using the canvas chafer assembling apparatus 5, and then the left and right As shown in FIG. 5A, the one-to-one rubbers M1L and M1R are assembled using a ribbon supply device 6 that is displaced and disposed at the position of the work station ST1.

  Subsequently, the molding drum 1 is moved to the work station ST2, and as shown in FIG. 5 (b), the carcass ply C is assembled using the carcass ply assembling apparatus 8, and then the second intermediate rubber M2 is assembled. Assembling is performed by using the ribbon supply device 6 that is displaced at the position of the work station ST2.

  Next, after moving the molding drum 1 to the work station ST3 and disposing the preset beads PB on the radially outer sides of the carcass ply C in the width direction, the band molding drum 1 is expanded and wound first. These are set by pressing the members inside the preset beads PB to form a carcass band, and then the band molding drum 1 is reduced in diameter as shown in FIG. Then, the carcass band is taken out from the band molding drum 1 and conveyed to the next process, while the band molding drum 1 is returned to the work station ST1.

  In such a carcass band molding system 10, the ribbon supply device 6 reciprocates between the work stations ST1 and ST2 so that the left and right first rubbers M1L and M1R and the second rubber M2 are attached. The three members are assembled by one ribbon supply device 6. And for tire components with a small cross-section, such as inter rubber, it is possible to feed ribbons at multiple stations with one ribbon feeder without sacrificing the overall tact time. This can reduce the equipment cost.

  The first embodiment is an example in which a ribbon supply device 6 is configured to move between two work stations adjacent to each other in a system having a molding carriage that sequentially moves between work stations. FIG. 6 and FIG.

  In the tire molding system 20 shown in FIG. 6, a molding carriage 22 on which a tire molding drum 21 is mounted stops at each of a plurality of work stations 31 to 34 arranged in a straight line. A system for sequentially moving these work stations 31 to 34 after a predetermined assembling work in each of them, and a ribbon supply device 23 in which two units of the ribbon supply units 23a and 23b are set as a ribbon. The supply device moving means 29 is configured to reciprocate between these stations. The ribbon supply units 23a and 23b may supply ribbons of the same rubber material or supply ribbons of different rubber materials.

  For example, the ribbon supply device 23a supplies the ribbon of the material m1, the ribbon supply device 23b supplies the ribbon of the material m2, the rubber member of the material m1 is assembled at the work stations 31 and 33, and the rubber member of the material m2 is attached to the work station. When the tire is molded by assembling at 32, 34, the ribbon supply device 23 is disposed at the position Pa, the ribbon of the material m1 is supplied from the ribbon supply unit 23a at the work station 31, and the rubber member is assembled. The ribbon supply device 23 is disposed at the position Pc, the ribbon of the material m1 is supplied from the ribbon supply unit 23a at the work station 33 and the rubber member is assembled. At the same time, the ribbon of the material m2 is supplied from the ribbon supply unit 23b at the work station 32. Then, the rubber member is assembled and then the ribbon supply device 23 is Disposed tio down Pe, assembling the rubber member by supplying the ribbon material m2 from the ribbon supply unit 23b in the working station 34. Finally, the ribbon supply device 23 may be returned to the position Pa to end the one cycle.

  FIG. 7 is a layout diagram showing a tire molding system having another aspect relating to the movement of the ribbon supply device. The tire molding stem 40 has a plurality of work stations 51 to 56 arranged in an annular shape, The molding carriage 42 on which the molding drum 41 is mounted is configured to retreat from the loop-shaped track 48 after repeating the operation of sequentially moving and stopping these work stations 51 to 56 along the loop-shaped track 48. In addition, three ribbon supply units 43a, 43b, and 43c are arranged in an inner area surrounded by the work stations 51 to 56, and these units are mounted and rotated, and stopped at a required work station. A rotating table 49 is provided as the ribbon supply device moving means. The ribbon supply device 43 is different from the ribbon supply device 23 in the tire molding system 20 in the number and arrangement of the ribbon supply units constituting the ribbon supply device 43, but the basic operation is the same as that of the ribbon supply device 23. Omitted.

  Next, a second embodiment will be described. FIG. 8 is a layout diagram showing a motorcycle tire molding system for molding a motorcycle radial tire. In the tire molding system 60 for a motorcycle, the carcass band disposed on the outer periphery of the former 61 is expanded in a toroidal shape by expanding the former 66, and the belt and the tread rubber are assembled to the toroidal carcass band. And a second molding station 62 that forms a belt tread band by winding a belt and a tread rubber around the outer periphery of the belt tread molding drum 64.

  Furthermore, the tire molding 60 for a motorcycle includes a ribbon supply device 63 configured to be able to supply a tread rubber ribbon at both the first station 61 and the second station 62, and the ribbon supply device 63. Ribbon supply device reciprocating means 69 for reciprocating displacement between the stations 61 and 62 is provided.

  Here, a description will be given of a belt structure of a radial tire for a motorcycle and an assembling procedure of the tire constituent member. As a belt structure of a radial tire for a motorcycle, one constituted by two belt layers inclined in opposite directions with respect to the tire equatorial plane, and instead of or in addition to these belt layers Some have a spiral layer in which a cord is wound spirally in the tire circumferential direction.

  9 and 10 are cross-sectional views of a tire for explaining a part of the molding process of the tire. FIG. 9 shows the former belt structure tire without a spiral layer, and FIG. 10 has a spiral layer. The tire of the latter belt structure is shown. In the tire without the spiral layer, as shown in FIG. 9A, the side portion of the carcass P is folded back around the bead core B on both sides in the width direction, and the side tread S is pasted on the outside, and the central portion of the carcass P is formed in a toroidal shape. The green case formed by bulging is made to wait at the first molding station 61, while at the second molding station, the two belt layers 1B and 2B are wound around the outer periphery of the belt tread molding drum 64 in order. A tread rubber ribbon is supplied to the outside from the ribbon supply device 63 to form a tread rubber T, and a belt tread band BT is formed as shown in FIG. 9B.

  Thereafter, the diameter of the belt tread molding drum 64 is reduced, the belt tread band BT is taken out from the belt tread molding drum 64, and this is moved to the outside in the radial direction of the carcass band that is made to stand by on the former 66 of the first molding station 61. 9C, the carcass band is further swelled in the center in the width direction, and as shown in FIG. 9D, the belt tread band BT is formed over the entire width direction. The both ends in the width direction of the belt tread band BT are tilted inward in the radial direction so as to be completely in close contact with the toroidal carcass band.

  On the other hand, when the belt has a spiral layer, as shown in FIG. 10 (a), the side portion of the carcass P is turned around the bead core B on both sides in the width direction at the first molding station 61, and the side tread is formed on the outer side. At the first molding station, on the outer periphery of the green case, as shown in FIG. 10 (b), the S is pasted and the central portion of the carcass P is expanded in a toroidal shape to form a green case. The belt layers 1B and 2B are assembled, and then a cord coated with rubber is wound around the outside in a spiral shape to form a spiral layer SP as shown in FIG. In synchronization with this rotation, a ribbon is supplied from the ribbon supply device 63 to form a tread rubber T outside the spiral layer SP.

  At this time, the spiral layer SP and the tread rubber T are directly affixed onto a carcass band having a cross-sectional shape in which the center bulges in a toroidal shape, so that it is not necessary to change the cross-sectional shape after affixing them. If the spiral layer SP is assembled on the above-described belt tread molding drum 64 having a flat circumferential surface in the width direction, both ends in the width direction are reduced in the step of closely contacting the toroidal carcass band. It is necessary to loosen the cords at both ends in the width direction, and the desired function of the spiral layer SP that suppresses the elongation due to the centrifugal force of the tread portion cannot be exhibited.

  Therefore, a tire having a spiral layer must be formed with the tread rubber T at the first molding station 61, while a tire without a spiral layer must be formed at the second molding station 62 in order to improve production efficiency. In this way, the ribbon supply device 63 moves to one of the first molding station 61 and the second molding station 62 according to the belt structure of the tire, and supplies the rubber ribbon there. Operates to

  Here, the ribbon supply device moving means 69 for moving the ribbon supply device 63 is configured by the ball screw 69a and the linear guide 69b. However, the configuration is not limited to this, and other configurations may be used.

  Conventionally, instead of providing the ribbon supply device moving means 69, a ribbon supply device 63 is installed in each of the first station 66 and the second molding station 64, and the first molding station is selected according to the belt structure of the tire. One of the ribbon supply devices 63 of 61 and the second molding station 62 is operated.

  The present invention can be used for molding processes of tires of various sizes.

It is a schematic diagram which shows the method of forming a rubber member using a continuous rubber ribbon. It is sectional drawing which shows the rubber member in the middle of being formed by the method of forming a rubber member using a continuous rubber ribbon. It is a layout view showing a part of a tire molding system for molding a tire by moving a molding carriage between work stations. 1 is a layout diagram illustrating a tire molding system according to a first embodiment of the present invention. It is a mimetic diagram showing the section of a tire for explaining the formation procedure of a carcass band. It is a layout view showing a ribbon supply device of a different movement mode. It is a layout view showing a ribbon supply device of a different movement mode. It is a layout view showing a tire molding system according to a second embodiment of the present invention. It is sectional drawing of a tire for demonstrating a part of process of assembling the tire of a belt structure without a spiral layer. It is sectional drawing of a tire for demonstrating a part of process of assembling the tire of the belt structure which has a spiral layer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tire molding drum 2 Molding cart 3 Endless track 4 Inner liner rubber assembly apparatus 5 Canvas chafer assembly apparatus 6 Ribbon supply apparatus 7 Ribbon supply apparatus moving means 8 Carcass ply assembly apparatus 9 Bead stock 10 Carcass band molding system 20 Tire Molding system 21 Tire molding drum 22 Molding carriage 23 Ribbon supply device 23a, 23b Ribbon supply unit 29 Ribbon supply device moving means 31, 32, 33 Work station 40 Tire molding stem 43a, 43b, 43c Ribbon supply unit 49 Rotary table 51, 52, 53, 54, 55, 56 Work station 60 Two-wheeled vehicle tire molding system 61 First molding station 62 Second molding station 63 Ribbon supply device 64 Belt tread molding drum 66 Former 9 Ribbon feeder reciprocating means 1B, 2B Belt layer B Bead core BT Belt tread band ST1, ST2, ST3 Work station C Carcass ply CCH Canvas chafer F Bead filler IL Inner liner rubber M1R, M1L, M2 rubber P Carcass PB Preset bead S Side tread SP Spiral layer T Tread rubber

Claims (3)

A plurality of work stations for assembling tire constituent members including a rubber member are provided, and among these two or more work stations, the rubber member is assembled using a ribbon supply device that supplies a continuous rubber ribbon on the periphery of the molding drum or core. In the configured tire molding system,
At least one ribbon supply device is configured such that the rubber member can be assembled at the two or more work stations, and ribbon supply device moving means for moving the ribbon supply device between the work stations is provided. Tire molding system.   The tire molding according to claim 1, comprising a plurality of molding carts that rotatably support the molding drum or core and having endless or endless tracks for moving the molding carts between the plurality of work stations. system. A system for molding tires for motorcycles,
As the work station, there is provided a ribbon supply device for arranging a first molding station for expanding a carcass band in a toroidal shape and a second molding station for assembling a belt and a tread rubber, and supplying a continuous rubber ribbon for the tread rubber. The ribbon supply device is configured so that the tread rubber can be assembled at any one of the first molding station and the second molding station, and the ribbon supply device is configured with the first molding station and the second molding station. The tire molding system according to claim 1, further comprising a ribbon supply device moving means for moving between the molding station and the molding station.

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