JP4468005B2 - Tire rubber layer forming method and tire manufacturing method - Google Patents

Description

The present invention includes a method for forming the rubber layer forming a rubber layer of the tire by winding a continuous body of unvulcanized rubber, a method of manufacturing a tire using the method.

  Conventionally, pneumatic tires are generally manufactured as follows. First, prepare bases that match the cross-sectional shape of the rubber members that make up the inner liner, carcass, sidewalls, etc., and cut the rubber members extruded through the bases to a specific size to prepare the desired rubber members To do. Next, each rubber member is set on the drum outer peripheral surface to produce a cylindrical molded body. An internal pressure is applied to the molded body using a rubber bag called a bladder to inflate it to a substantially tire size, and then a belt member and a tread member are bonded together to form a raw tire made of unvulcanized rubber. Thereafter, a raw tire is set in a mold (outer mold) of a vulcanizer, heated and vulcanized while being pressurized from the inside of the tire, and cooled while maintaining the internal pressure as necessary to produce a product tire.

  However, there are a great many types of rubber members that make up inner liners and sidewalls as the structure and size of tires diversify, so it is necessary to prepare a large amount of caps according to the type of tire. In addition, each time the tire type is changed, the base must be changed and adjusted, making it unsuitable for high-mix low-volume production. Further, the work of carefully positioning and setting the rubber member on the drum and the work of inflating the cylindrical molded body are required, which hinders productivity. Furthermore, when the cylindrical molded body is inflated, the area near the tire equator line has a high expansion rate, so the area of the rubber member is formed thick in advance, and the expansion is due to air pressure. In some cases, the uniformity (uniformity) of the tire was impaired. In addition, the belt member is formed into a sheet-like material by, for example, an apparatus described in Patent Document 1 described below, and manufacturing such a sheet-like material requires a large-scale calendar facility and a cutting facility. It was.

  On the other hand, the following Patent Document 2 discloses a manufacturing method of a pneumatic tire in which a tire casing having a belt layer arranged on the outer periphery of a carcass layer is formed and a tread layer is formed by winding a rubber strip around the outer peripheral surface. ing. According to this method, there is no need to prepare a tread member for each tire type, and this method is suitable for high-mix low-volume production. However, the tire casing itself is formed by a conventional method, and has the above-described drawbacks regarding the formation of the inner liner layer, the sidewall layer, and the like.

On the other hand, Patent Document 3 below discloses a method of forming a rubber product by winding a rubber strip around a rigid core. In this document, by the translational movement and swinging movement of an extruder having an outlet opening (orifice) and the rotation (spinning) movement of the orifice, it is possible to wrap a rubber strip across the tire outer peripheral side between the bead parts, Further, it is disclosed that a rubber product having a desired shape is formed by feeding a certain amount of rubber on a certain radius with respect to a certain rotation angle of the rigid core. However, since this technique moves an extruder, which is generally a heavy object, in accordance with a winding operation, a relatively large-scale facility is required. In addition, when rubber is placed around the bead portion, in addition to the rotation of the rigid core, movements such as swinging and translation of the extruder and rotation of the orifice (rotation) are required, so the forming operation becomes complicated and control is required. It becomes relatively difficult.
JP-A-11-165360 JP-A-10-193475 JP-A-63-89336

Accordingly, an object of the present invention is a tire rubber that has a simple forming operation and is relatively easy to control, has high productivity, is suitable for high-mix low-volume production, has few structural restrictions on tires, and has excellent uniformity. It is to provide a method for forming a layer and a method for manufacturing a tire using the method.

The above object can be achieved by the present invention as described below. That is, the method for forming a rubber layer according to the present invention is a method for forming a rubber layer constituting a tire, and a linear or belt-like continuous body made of unvulcanized rubber is disposed at least on the tire outer periphery side between bead portions. An annular core provided with a surface on which a rubber layer is formed is guided using a guide device having a U-shaped or annular path portion that is bridged and guided by a guide portion that is movable along the path portion. And a step of winding the continuum helically along the tire circumferential direction while pressing the continuum on the surface on which the rubber layer is formed, relative to the guide device in the tire rotation direction.

  According to the method for forming a rubber layer of the present invention, a continuous body is guided along a path portion spanned on the tire outer periphery side between the bead portions, and the annular core is tired with respect to the guide device having the path portion. Since the continuous body is wound while pressing relative to the surface on which the rubber layer is formed, the forming operation is simple and the control is easy, and the speed of the control operation can increase the productivity. In addition, it is possible to reduce the size of the equipment and facilitate handling, and in order to wind the continuous body in a spiral shape along the circumferential direction of the tire, a rubber layer corresponding to the type of tire is appropriately formed by controlling the above forming operation. Therefore, it is possible to provide a method for forming a rubber layer that can be used for a wide variety of small-quantity production and has few structural restrictions on the product tire. The thickness of the rubber layer can be arbitrarily controlled, and excellent uniformity can be obtained. The route portion of the guide device spans at least the tire outer periphery side between the bead portions, and not only the tread layer disposed on the tread surface portion but also the inner liner layer, sidewall layer, and bead portion disposed on the tire side. Even in the vicinity of the rim strip layer or the like, each rubber layer can be effectively formed by guiding the continuum. The “layer” refers to a constituent material that constitutes each part such as an inner liner part in the tire molded body, and the “member” is used to denote a constituent material that constitutes each part before the tire molding. In the method according to the present invention, since the formed “member” can directly become a “layer” of a tire, the formed product is called a “layer”.

In the tire manufacturing method according to the present invention, a linear or belt-like belt continuous body in which one or more rows of cord materials are coated with unvulcanized rubber is guided by the guide portion using the guide device. However, an annular core provided with a belt layer forming surface having a substantially carcass layer outer surface shape is moved relative to the guide device in the tire rotation direction, and the belt continuum is moved to the belt layer. A step of winding at a predetermined angle with respect to the circumferential direction of the tire while being pressed onto the surface to be formed, a step of cutting the belt continuous body into a predetermined length before or after the winding , A belt layer forming step, and the rubber layer forming step .

Since the main structure of the tire manufacturing method of the present invention is the same as that of the rubber layer forming method, the above-described effects are exhibited. That is, the forming operation is simple and the control is easy, and the productivity can be increased by increasing the speed of the control operation. In addition, the equipment can be downsized and handled easily. Further, in relation to the relative movement of the annular core in the tire rotation direction, by controlling the guide along the path portion of the belt continuum, the belt continuum can be moved at any angle with respect to the tire circumferential direction. It is possible to wind it in an inclined manner. At that time, by cutting the belt continuous body to a predetermined length before winding or after winding, the belt continuous body can be continuously wound, and the belt continuous bodies are arranged in parallel by repeating the above steps. Thereby, a belt layer can be formed suitably.

Method of manufacturing a tire, by providing the more formation Engineering of the rubber layer, it is possible to provide a tire manufacturing method to achieve the effect of the above. That is, the forming operation is simple and the control is easy, and the productivity can be increased by increasing the speed of the control operation. In addition, it is suitable for high-mix low-volume production, and there are few structural restrictions on the product tire, and excellent uniformity can be obtained. In addition, since the rubber layer forming step and the belt layer forming step can be performed by a similar mechanism, for example, the belt layer and the sidewall layer can be formed by the same apparatus or a continuous process. Productivity can be increased.

In the tire manufacturing method according to the present invention, a linear or belt-like continuous body of carcass in which one or a plurality of rows of carcass cord materials are coated with unvulcanized rubber is provided with a surface on which a carcass layer is formed. The bead portion is repeatedly wound around the annular core through the tire outer periphery side and the tire inner periphery side in sequence so that the carcass cord material is arranged substantially in the tire radial direction. The carcass layer is formed by cutting the carcass continuum on the inner circumferential side of the tire while leaving the folded portion of the carcass layer, and then folding the folded portion to the outside of the tire with respect to the bead material disposed before or after the cutting. comprising a step of forming, the formation Engineering degree of the rubber layer.

  Thereby, for example, after the inner liner layer is formed by the rubber layer forming step described above, the carcass layer can be continuously formed with the outer surface of the inner liner layer as the surface on which the carcass layer is formed. Further, the outer surface of the formed carcass layer is used as a side wall layer or belt layer forming surface, and the side wall layer is formed by the above-mentioned rubber layer forming step, or the belt layer is formed by the above-described belt layer forming step. You can do it. Therefore, a raw tire can be formed by a continuous process, and the tire can be manufactured efficiently. According to the carcass layer forming step, the forming operation is simple and easy to control, and the productivity can be increased by speeding up the control operation. In addition, the equipment can be downsized and handled easily. Furthermore, there is little need to change the winding operation depending on the tire type, and it is easy to deal with multi-product production. Moreover, since the carcass continuum on the tire inner periphery side between the bead portions is cut leaving the folded portion of the carcass layer, the carcass layer wound back by the bead material can be made sufficiently long.

  In the above, the path portion of the guide device has an annular shape, and in the step of forming the carcass layer, while guiding the carcass continuous body along the path portion, the annular core is connected to the guide device. On the other hand, it is preferable that the carcass continuous body is wound by being relatively moved in the tire rotating direction.

  When the carcass layer is formed, the carcass continuum is configured to be wound around the annular core while being guided along the path portion of the guide device described above, thereby forming a raw tire by a continuous process using the same device. Tires can be manufactured more efficiently.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is an example of a meridian cross-sectional view of a tire. The tire T includes a pair of bead portions 1 and is arranged so that a carcass layer 7 in which a cord material is arranged in the tire radial direction is bridged between the bead portions 1. The end portion of the carcass layer 7 is folded back from the inside toward the outside in the bead wire 9, and the bead filler layer 6 is disposed so as to be sandwiched between the folded portions. A rim strip layer 4 is disposed outside the bead portion 1, and sidewall layers 3 extending from the rim strip layer 4 to the outside in the tire radial direction are disposed. A belt layer 8 in which cord materials are arranged at a predetermined angle is disposed immediately on the outer peripheral side of the carcass layer 7, and a tread layer 2 is further disposed on the outer peripheral side thereof. An inner liner layer 5 is disposed on the inner peripheral side of the carcass layer 7. In the first embodiment, a method for forming the inner liner layer 5 will be described.

  In the present embodiment, as shown in FIGS. 2 to 4, the inner liner layer 5 passes the guide portion 15 in which the bobbin 10 for feeding the rubber ribbon 11 (corresponding to the continuous body) is set, the path of the guide device 17. It is formed by winding the rubber ribbon 11 sequentially in the tire circumferential direction by moving the annular core 14 in the tire rotational direction R while guiding along the portion 16.

  The rubber ribbon 11 is made of unvulcanized rubber. If the rubber ribbon 11 is an unvulcanized rubber used for forming the inner liner layer 5, a material considering adhesiveness with the carcass layer 7 and the like is appropriately selected. The width of the rubber ribbon 11 is appropriately selected depending on the type of rubber layer to be formed, but is preferably 5 to 30 mm, particularly preferably 5 to 20 mm. If the width of the rubber ribbon 11 is less than 5 mm, the number of windings becomes too large, and the production efficiency is lowered, which is not preferable. On the other hand, if it exceeds 30 mm, the formation accuracy is lowered, which is not preferable. When the inner liner layer 5 is formed, it is preferable to use a layer having a relatively wide width in consideration of a bonding margin (overlapping portion). And in order to ensure joining of adjacent rubber ribbons 11, for example, a shape having an inclined end surface such that the cross section exhibits a parallelogram or crescent shape is preferable.

  Such a rubber ribbon 11 can be manufactured by an apparatus as shown in FIG. 5, for example. According to this apparatus, the unvulcanized rubber kneaded and extruded by the extruder 22 is extruded into a strip shape (ribbon shape) via the extrusion head 23. The rubber ribbon 11 extruded in a band shape is wound up together with the separator 13 on the bobbin 10 set on the drive shaft of the winding motor 24. At that time, the separator 13 is supplied from the separator reel 25. The separator 13 is interposed so that the rubber ribbon 11 can be suitably fed from the bobbin 10 and is useful when the adhesive strength between the rubber ribbons 11 is large. It is preferable to wind the amount of rubber ribbon 11 required for a desired rubber layer in one tire on the bobbin 10, but when the amount is insufficient, winding is performed using a plurality of bobbins 10 sequentially. Just do it.

  As described above, the rubber ribbon 11 used in the present invention can be manufactured with a relatively small apparatus, and the necessity for changing the shape and size of the rubber ribbon 11 for each tire type is small. It becomes easy to cope with small-scale production.

  The rubber ribbon 11 is wound around a surface 18 of a rubber layer provided on the annular core 14. Here, it is preferable that the surface of the annular core 14 has a substantially inner surface shape of the tire T. Thereby, the surface of the annular core 14 can be used as the formation surface 18 of the inner liner layer 5. Further, the carcass layer 7 and the belt layer 8 can be sequentially formed on the outer peripheral side of the inner liner layer 5 formed by the method according to the present invention by a method to be described later, and the outer surfaces thereof are formed on the sidewall layer 3 and the tread layer. 2 or the like. That is, in the present invention, the rubber layers can be sequentially formed from the inner peripheral side of the tire, so that the outer surface of the formed rubber layer can be the surface on which the rubber layer is disposed on the outer peripheral side. Thereby, the green tire which consists of unvulcanized rubber can be manufactured in a series of processes.

  The annular core 14 is configured to be movable in the tire rotation direction R by a driving device (not shown). The annular core 14 is configured to be freely connected and divided at the boundary portion 14a so that the rubber layer or green tire after formation can be easily taken out. The connection structure at the boundary portion 14a may be any conventionally known connection means (for example, a combination of a fitting portion and a lock mechanism).

  The guide device 15 includes at least a path portion 16 spanning the tire outer peripheral side TO between the bead portions 1 and a guide portion 17 movable along the path portion 16, and the path portion 16 is formed by a member (not shown). It is supported. As shown in FIGS. 2 and 3, the path portion 16 of the present embodiment is an annular body, and the path portion 16 and the annular core 14 are arranged so as to penetrate each other through the hollow portion. Here, the path portion 16 may be U-shaped across the tire outer peripheral side TO between the bead portions 1, but is preferably annular as in the present embodiment. Thereby, the freedom degree of the movement of the guide part 17 becomes large, and formation of the carcass layer 7 which will be described later becomes possible. In addition, the shape of the path | route part 16 is not restricted to the shape where the circumference or the curve was connected, The shape which contains a straight line in part may be sufficient.

  The path portion 16 of the guide device 15 is configured to be freely connected and divided at the boundary portion 16a. By inserting one end of the annular core 14 in a state where the path portion 16 is divided at that portion, the path portion 16 is arranged around the trunk portion of the annular core 14, that is, around the surface 18 of the rubber layer. can do. Similarly, when the formed rubber layer or green tire is removed, the path portion 16 may be divided. The connecting structure at the boundary portion 16a may be any conventionally known connecting means.

  As shown in FIG. 6, the path portion 16 has an opening 26 on the inner peripheral side, and serves as a rail that smoothly moves the guide portion 17 set in the opening 26. A rack 27 is formed in the opening 26 of the path portion 16 over the entire circumference, and the rotation of the pinion gear 28 provided on the drive shaft of the motor 29 provided in the guide portion 17 causes the path portion 16 of the guide portion 17 to move. Movement along. The support roller 30a included in the guide portion 17 is in contact with the path portion 16 in the tire radial direction from the inner side, and the support roller 30b is in contact with the path portion 16 in the tire circumferential direction from the inner side. Accordingly, when the guide portion 17 moves along the path portion 16 in the tire outer peripheral side TO between the bead portions 1, the guide portion 17 is suitably supported from each direction.

  As shown in FIG. 4, a bobbin support 19 is provided on the surface on which the guide portion 17 is formed, and the bobbin 10 for feeding the rubber ribbon 11 and the reel 31 for winding the separator 13 are provided on the bobbin support 19. Supported. The bobbin 10 is set on a driven shaft 32 supported by the bobbin support portion 19. The driven shaft 32 is preferably provided with a tension adjusting mechanism for adjusting the tension applied to the rubber ribbon 11. Further, an appropriate power transmission mechanism is provided between the reel 31 and the driven shaft 32 so that the rotation of the driven shaft 32 is transmitted and the reel 31 can be wound.

  A pressing roller 20 supported by a driven shaft 33 is provided on the forming surface side of the bobbin support portion 19, and the rubber ribbon 11 is wound around the forming surface 18 while being pressed by the pressing roller 20. By pressing against the forming surface 18 with the pressing roller 20 at the time of winding, it can be suitably performed even when winding around a tire side or the like.

  A driven shaft 33 that supports the pressing roller 20 is supported by a support member 34, and the support member 34 is fixed to the bobbin support portion 19 by a pin 35. When the pin 35 is loosened, the support member 34 can be rotated around the pin 35, and the distance between the pressing roller 20 and the forming surface 18 can be adjusted. The said space | interval can be suitably adjusted in consideration of the thickness and position of the rubber layer to form.

  With the above apparatus configuration, the guide portion 17 moves along the path portion 16 while guiding the rubber ribbon 11, thereby pressing the rubber ribbon 11 in the tire circumferential direction while pressing the rubber ribbon 11 within the range of the tire outer peripheral side TO between the bead portions 1. Can be wound. At that time, a rubber member having a desired shape can be obtained by controlling the movement of the guide portion 17 and the rotation of the annular core 14. For example, when the inner liner layer 5 is formed, the annular core 14 is rotated while moving the guide portion 17 from one bead portion 1 to the other bead portion 1. However, when the rubber ribbon 11 is wound in the tire circumferential direction, it is necessary to wind the rubber ribbon 11 at a position shifted from the opposing position by the width of the rubber ribbon 11 from a position where the winding is started to a position rotated once in the tire circumferential direction.

  In addition, you may wind the rubber strip (equivalent to the said continuous body) extruded from the extruder around the to-be-formed surface, without using the bobbin 10 around which the rubber ribbon 11 is wound. In this case, as shown in FIG. 7, the rubber strip 36 extruded from the extruder 22 is sent to the guide device 38 via the guide roller 37. As shown in FIG. 8, the guide unit 39 of the guide device 38 is provided with a roller support unit 40 having the same configuration as the bobbin support unit 19 described above, and the driven roller pair 41 is supported by the roller support unit 40. . The rubber strip 36 is wound around the surface to be formed 18 from a pair of driven rollers 41 via a pressing roller 20 whose distance from the surface to be formed 18 can be adjusted. By using the unvulcanized rubber strip 36, the formation process can be simplified and good adhesiveness can be utilized.

  7 and 8, the bobbin around which the rubber ribbon 11 is wound is installed at the position of the extruder 22, and the rubber ribbon sent out from the bobbin is sent to the guide device 38 and guided by the guide unit 39. It is also possible to use a configuration that winds the

  According to the rubber layer forming method of the present invention, not only the inner liner layer 5 but also other rubber layers such as the sidewall layer 3, the tread layer 2, the bead filler layer 6, and the rim strip layer 4 are suitably formed. be able to. In this case, the formation surface 18 of the rubber layer is not limited to the surface directly provided on the surface of the annular core 14, and the outer surface of the rubber layer, the carcass layer 7, the belt layer 8 or the like previously formed on the annular core 14. It may be provided.

  The belt layer 8 and the carcass layer 7 can be formed by a method that will be described later. According to the present invention, a green tire can be formed by a continuous process using the same apparatus. The annular core 14 may be taken out after vulcanization, but it is preferable to remove it at the stage of the raw tire. After that, the green tire is set in a mold (outer mold) of the vulcanizer and pressurized from inside the tire. It is possible to produce a product tire by heating and vulcanizing while cooling, if necessary, while maintaining the internal pressure.

[Second Embodiment]
2nd Embodiment demonstrates the formation process of the belt layer 8 with which the manufacturing method of the tire which concerns on this invention can be equipped . The second embodiment is substantially the same configuration and operation as the first embodiment except that the formed material is the belt layer 8 and the device configuration is as follows, so only the differences will be described. Common descriptions are omitted.

  In the second embodiment, as shown in FIG. 9, a linear or belt-like topping cord 12 (corresponding to the belt continuum) in which one or more rows of cord materials 12a are covered with unvulcanized rubber 12b. Is used. As the cord material 12a, an organic fiber such as polyester, rayon, nylon, or a metal wire such as steel is preferably used. As the unvulcanized rubber 12b, a material considering adhesiveness with other rubber materials such as sidewall rubber is appropriately selected. Although the width dimension of the topping cord 12 is appropriately selected, it is preferably 5 to 30 mm.

  Such a topping code 12 can be manufactured by an apparatus as shown in FIG. 10, for example. The apparatus shown in FIG. 10 has a configuration in which a plurality of reels 21 for feeding out the cord material 12a are added to the extruder 22 shown in FIG. 5, and the extrusion head 23 is used as an unvulcanized rubber 12b for the plurality of cord materials 12a arranged in parallel. And extruding into a strip shape (ribbon shape).

  As shown in FIGS. 11A and 11B, the winding of the topping cord 12 around the surface to be formed 18 is the amount of movement along the path portion 16 of the guide portion 17 in relation to the amount of rotation of the annular core 14. And the cord material 12a is arranged so as to be inclined at a predetermined angle with respect to the tire circumferential direction. Then, the topping cord 12 is cut at the stage of FIG. Thereafter, the annular core 14 is reversely rotated or rotated once to return the guide portion 17 to the position shown in FIG. At this time, the winding start position is set to a position shifted in the tire circumferential direction by the width of the topping cord 12 so that the topping cord 12 to be wound next is arranged in parallel with the already wound topping cord 12. By repeating the winding operation as described above, the belt layer 8 can be formed over the tire circumferential direction.

  The topping cord 12 can be cut by providing a cutting mechanism such as a belt cutter. The cutting mechanism is controlled to perform cutting at an appropriate timing in relation to the rotation of the annular core 14 or the movement of the guide portion 17. The cutting timing may be a stage at which the winding is substantially finished as described above, or may be cut to a predetermined length in advance before starting the winding. The cutting mechanism may be provided in the guide device 15, but may be provided on the upstream side of the guide device 15 when the topping cord 12 extruded from the extruder 22 is directly wound. Note that the cutting mechanism can also be used after the rubber layer is formed in the first embodiment.

  Further, the belt reinforcing layer can be formed by winding the topping cord 12 around the belt layer 8 in the tire circumferential direction.

[Third Embodiment]
In the third embodiment, a method for forming the carcass layer 7 will be described. The forming process of the carcass layer 7 is provided in the tire manufacturing method according to the present invention as a pre-process or a post-process of the above-described rubber layer forming process or as a pre-process of the above-described belt layer forming process. .

  For the formation of the carcass layer 7, a linear or belt-like topping cord 42 (corresponding to the carcass continuous body) in which one or a plurality of rows of carcass cord materials are coated with unvulcanized rubber is used. 9 can be produced in the same manner as the topping cord 12 described above. As the carcass cord material, an organic fiber such as polyester, rayon, nylon, or a metal wire such as steel is preferably used. The topping cord 42 is formed on the carcass layer 7 with respect to the surface on which the carcass layer 7 is formed, for example, the outer surface of the inner liner layer 5 formed on the surface of the annular core 14 by the method of the first embodiment. Wrapped to be arranged in the direction.

  The carcass layer 7 may be formed by a device separate from the above-described devices used for forming the rubber layer and the belt layer, or may be formed by the same device. When using a separate device, for example, a device disclosed in JP-A-2001-171014 can be used. On the other hand, when the carcass layer 7 is formed using the above-described apparatus configuration, the path portion 16 needs to be annular as in the above-described embodiment. Further, in order to wind the topping cord 42 substantially in the radial direction of the tire, it is preferable that the guide portion 17 is configured to be rotatable by 90 °. Further, the annular core 14 is cut by a wound topping cord 42 described later. It is preferable that the cutting groove 14b as shown in FIG.

  First, as shown in FIG. 12 (a), the carcass layer 7 is formed by placing the topping cord 42 on the surface on which the carcass layer 7 is formed (the outer surface of the inner liner layer 5) and the carcass cord material in the tire radial direction. The tire is repeatedly wound around the tire outer peripheral side TO and the tire inner peripheral side TI between the bead portions 1 in order. At that time, the annular core 14 is moved in the tire rotation direction R while the guide portion 17 is moved annularly along the path portion 16. After the topping cord 42 is wound, as shown in FIG. 12B, the bead material 43 is disposed on the bead portion 1, and the topping cord 42 on the tire inner peripheral side TI between the bead portions 1 is turned to the folded portion of the carcass layer 7. 7a is left and it cut | disconnects in the part of the groove | channel 14b for a cutting | disconnection of the annular core 14. FIG. As the bead material 43, a bead filler layer 6, a bead wire 9, a reinforcing layer around the bead (not shown), or the like is appropriately used. The bead filler layer 6 and the reinforcing layer around the bead may be formed by using the method of the first embodiment, or an appropriate member may be disposed. The bead material 43 may be disposed before or after the above-described cutting, but is preferably disposed before cutting in order to prevent misalignment of the carcass layer 7 and the folded portion 7a after cutting. . Next, as shown in FIG. 12C, the carcass layer 7 is formed by folding the folded portion 7 a to the outside of the tire with respect to the arranged bead material 43.

  The tire manufacturing method according to the present invention preferably includes a step of forming the carcass layer 7 and a rubber layer and a belt layer other than the carcass layer 7 using the same apparatus as described above. Thereby, after forming the inner liner layer 5 by the above-mentioned method, the outer surface of the inner liner layer 5 can be efficiently formed as the surface on which the carcass layer 7 is formed. Further, the side wall layer 3 and the belt layer 8 can be formed by the above-described method using the outer surface of the formed carcass layer 7 as the surface on which the side wall layer 3 and the belt layer 8 are formed. Tires can be formed.

[Other Embodiments]
Hereinafter, other embodiments of the present invention will be described.

  (1) In the above-described embodiment, the example in which the annular core 14 is rotationally driven has been described. However, in the present invention, the annular core 14 may be moved relative to the guide device 15 in the tire rotation direction R. The guide device 15 may be moved in the tire circumferential direction.

  (2) In the above-described embodiment, an example in which the guide device 15 includes the single guide portion 17 has been described. However, a plurality of guide portions 17 may be provided in the guide device 15 as indicated by dotted lines in FIG. . In that case, the plurality of guide portions 17 are controlled so that they do not interfere with each other. Thereby, for example, by providing the guide portion 17 for each type of rubber layer, it is possible to omit a setup change for changing the rubber material. Alternatively, by providing the guide portions 17 on the tread portion and the tire side, for example, the sidewall layers 3 on both sides of the tire can be formed simultaneously, and productivity can be improved.

  (3) In the above-described embodiment, when the belt layer 8 is formed, the example in which the path portion 16 is disposed substantially parallel to the tire meridian direction is shown. However, in the present invention, the path portion 16 is arranged in the tire meridian direction. You may incline and arrange | position. At this time, the direction of inclination is made to approach the angle at which the cord material 12a is disposed. Thereby, the rotation amount of the annular core 14 at the time of winding can be suppressed, and the guide accuracy can be improved.

  Further, it is preferable to wind the topping cord 12 regardless of the rotation direction of the annular core 14. According to this, in the state of FIG. 11C, the topping cord 12 to be wound next can be wound in parallel with the already wound topping cord 12 while rotating the annular core 14 in the reverse direction. Therefore, the belt layer 8 can be formed efficiently. In this way, when the reciprocating winding is performed, the pressing rollers 20 for finally guiding the topping cord 12 may be provided on both sides in the tire circumferential direction.

  (4) The configuration of the path portion and the guide portion of the guide device used in the present invention is not limited to that shown in the above embodiment.

A meridian cross section showing an example of a tire The schematic perspective view for demonstrating the formation method of the rubber layer of this invention The front view which shows an example of the apparatus used for the formation method of the rubber layer of this invention The side view enlarged view which shows an example of the apparatus used for the formation method of the rubber layer of this invention The perspective view which shows an example of the manufacturing apparatus of the rubber ribbon used by this invention Side view sectional drawing which shows an example of the guide apparatus used by this invention The schematic perspective view for demonstrating another form of this invention Side view enlarged view for explaining another embodiment of the present invention Sectional drawing which shows an example of the topping cord used by this invention The perspective view which shows an example of the manufacturing apparatus of the topping cord used by this invention The schematic plan view for demonstrating the formation method of the belt layer of this invention Sectional drawing for demonstrating the formation method of a carcass layer

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bead part 3 Side wall layer 5 Inner liner layer 7 Carcass layer 8 Belt layer 10 Bobbin 11 Rubber ribbon 12 Topping cord 14 Annular core 15 Guide device 16 Path | route part 17 Guide part 18 Forming surface 20 Pressing roller 34 Support member 36 Rubber strip 42 Topping code R Tire rotation direction T Tire TI Tire inner peripheral side TO Tire outer peripheral side

Claims (5)

A method for forming a rubber layer of a tire, comprising:
A linear or belt-like continuous body made of unvulcanized rubber is used at least along the path portion by using a guide device having a U-shaped or annular path portion spanned on the tire outer peripheral side between the bead portions. While guiding with a movable guide part ,
An annular core provided with a surface on which a rubber layer is formed is moved relative to the guide device in the tire rotation direction,
A method for forming a rubber layer, comprising a step of winding the continuous body in a spiral shape along a tire circumferential direction while pressing the continuous body on a surface on which the rubber layer is formed. While guiding a linear or belt-like belt continuum in which one or more rows of cord materials are coated with unvulcanized rubber, using the guide device,
An annular core provided with a surface on which a belt layer having a substantially carcass layer outer shape is provided is moved relative to the guide device in the tire rotation direction,
Winding the belt continuum on the forming surface of the belt layer while inclining at a predetermined angle with respect to the tire circumferential direction; and
Cutting the belt continuous body into a predetermined length before or after the winding, and forming a belt layer ,
A method for manufacturing a tire comprising the rubber layer forming step according to claim 1. Method of manufacturing a tire provided with a higher formation Engineering of claim 1 rubber layer according. A linear or belt-like carcass continuum in which one or a plurality of rows of carcass cord materials are coated with unvulcanized rubber is applied to the annular core provided with the surface on which the carcass layer is formed. The carcass continuum on the tire inner circumference side between the bead portions after being repeatedly wound sequentially through the tire outer circumference side and the tire inner circumference side between the bead portions so that the material is arranged substantially in the tire radial direction. Cutting the carcass layer leaving the folded portion, and then forming a carcass layer that folds the folded portion back to the outside of the tire with respect to the bead material arranged before or after the cutting, and
A tire manufacturing method and a claim 1 formed Engineering degree of the rubber layer according.   The route portion of the guide device has an annular shape, and in the step of forming the carcass layer, while guiding the carcass continuous body along the route portion, the annular core is tired with respect to the guide device. The tire manufacturing method according to claim 4, wherein the carcass continuous body is wound by relative movement in the rotation direction.

Images