JP2013035218A - Belt molding apparatus and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve tire productivity in a belt molding apparatus and method.SOLUTION: The apparatus includes a molding drum 11 having a plurality of rotatable drums 21, 22; a belt layer winding device 13 for winding first and second belts B1, B2 around the outer circumferential surface of the molding drum 11; a cord winding device 14 for winding a steel cord S around the outer circumferential surface of the molding drum 11; and a reversion device 15 for reversing the position of each of the drums 21, 22.

Description

  The present invention relates to a belt forming apparatus and method for forming a belt that functions as one of constituent members of a tire.

  Conventionally known general pneumatic tires are configured by providing one or a plurality of belt layers on the outer peripheral side of the carcass layer and providing a tread on the outer peripheral side of the belt layer. As this belt layer, it has been proposed to provide a reinforcing layer around which a steel cord or the like is wound so that the winding angle with respect to the tire circumferential direction is substantially 0 degrees.

  Conventionally, when manufacturing a pneumatic tire, a sheet-like member such as a carcass or an inner liner is wound around a band drum to form a cylindrical band member, while a sheet-like member such as a belt layer or a tread is formed on the belt drum. A tubular belt member is formed by winding, and a band member is assembled to the inside of the outer belt member to form a tire shape, and vulcanization is performed.

  Such a tire manufacturing apparatus is described in the following patent document.

JP 2006-116817 A JP 2006-347003 A

  When a pneumatic tire having a reinforcing layer is manufactured by the conventional tire manufacturing apparatus described above, a steel cord is wound on a belt layer wound around a belt drum, and a tread is wound around the steel cord. It is necessary to mold the belt member. This steel cord has a length of 200 m to 500 m in the case of a single winding, and takes a long time to be wound around the belt drum. Therefore, the belt member molding time becomes longer than the band member molding time, and the waiting time increases, so that the tire molding time becomes longer, and the productivity of tire manufacturing is greatly reduced. .

  The present invention solves the above-described problems, and an object of the present invention is to provide a belt forming apparatus and method capable of improving tire productivity.

  In order to solve the above-described problems and achieve the object, a belt forming apparatus according to the present invention includes a forming drum having a plurality of rotatable drums, a reversing device for reversing the position of each drum, A belt layer winding device for winding a belt layer around an outer peripheral surface, and a cord winding device for winding a reinforcing cord around the outer peripheral surface of each drum along a direction substantially parallel to a tire equator line.

  According to this belt forming apparatus, since the reinforcing cord and the belt layer are wound around the outer peripheral surface of each drum while rotating the forming drum, the reinforcing layer and the belt layer constituted by the reinforcing cord are separated from the other belt layers. The tire productivity can be improved by performing the tire forming operation continuously and efficiently.

  In the belt forming apparatus of the present invention, the belt layer winding device includes an inner belt winding device for winding one or a plurality of inner belt layers inside the reinforcing cord.

  According to this belt forming apparatus, the belt layer can be formed inside the reinforcing layer constituted by the reinforcing cord, and the workability of the assembling work in the reinforcing layer and the belt layer can be improved.

  In the belt forming apparatus of the present invention, the belt layer winding device includes an outer belt winding device that winds one or more outer belt layers around the reinforcing cord.

  According to this belt forming device, the belt layer can be formed outside the reinforcing layer constituted by the reinforcing cord, and the workability of the assembling work in the reinforcing layer and the belt layer can be improved.

  In the belt forming apparatus according to the present invention, the belt layer winding device can wind a plurality of belts composed of rubber cords having a predetermined inclination angle around the tire equator line, and each belt includes the rubber cords. They are characterized by crossing each other.

  According to this belt forming apparatus, it is possible to easily form a reinforcing layer made of a reinforcing cord substantially parallel to the tire equator line and a plurality of belt layers made of a plurality of rubber cords that are inclined to the tire equator line and intersect each other. it can.

  The belt forming method of the present invention includes a drum rotating step of rotating a plurality of drums in a forming drum, a belt layer winding step of winding a belt layer around an outer peripheral surface of one drum in the forming drum, And a cord winding step of winding a reinforcing cord around the outer peripheral surface of one drum.

  According to this belt forming method, the belt layer is wound around the outer peripheral surface of one drum while rotating each drum, and the reinforcing cord is wound around the outer peripheral surface of another drum. The reinforcing layer and the belt layer configured by the above can be formed, and the tire productivity can be improved by continuously and efficiently performing the tire forming operation.

  In the belt forming method of the present invention, the belt layer is wound around the outer peripheral surface of one drum of the forming drum, the reinforcing cord is wound around the outer peripheral surface of the other drum of the forming drum, and then the position of each drum is set. The reinforcing cord is wound around the outer peripheral surface of the one drum, and the belt layer is wound around the outer peripheral surface of the other drum.

  According to this belt forming method, after winding the belt layer and the reinforcing cord around different drums, the position of each drum is reversed, and then the reinforcing cord and the belt layer are wound around each drum. This eliminates the need to move the device and improves workability.

  In the belt forming method of the present invention, after the inner belt layer is wound around the outer peripheral surface of the drum in the belt layer winding step, the reinforcing cord is wound around the outer peripheral surface of the inner belt layer in the cord winding step. It is characterized by winding.

  According to this belt forming method, the inner belt layer and the reinforcing layer can be easily formed because the inner belt layer is wound around the outer peripheral surface of the drum while the drum is rotated and the reinforcing cord is wound around the outer peripheral surface of the belt layer. .

  In the belt forming method of the present invention, after the reinforcing cord is wound around the outer peripheral surface of the drum in the cord winding step, an outer belt layer is formed on the outer peripheral surface of the reinforcing cord in the belt layer winding step. It is characterized by winding.

  According to this belt forming method, the reinforcing cord is wound around the outer peripheral surface of the drum while the drum is rotated, and the outer belt layer is wound around the outer peripheral surface of the reinforcing cord. Therefore, the reinforcing layer and the outer belt layer can be easily formed. .

  A belt forming apparatus and method according to the present invention include a forming drum having a plurality of rotatable drums, a reversing device that reverses the position of each drum, a belt layer winding device that winds a belt layer around the outer peripheral surface of the drum, Since a cord winding device is provided on the outer peripheral surface of the drum to wind the reinforcing cord along a direction substantially parallel to the tire equator line, the reinforcing cord and the belt layer are wound around the outer peripheral surface of each drum while rotating the forming drum. In addition to the other belt layers, it is possible to form a reinforcing layer and a belt layer composed of reinforcing cords, and to improve tire productivity by performing tire forming operations continuously and efficiently. .

FIG. 1 is a schematic diagram showing a belt forming apparatus and method according to a first embodiment of the present invention. FIG. 2 is a schematic configuration diagram of the belt forming apparatus according to the first embodiment. FIG. 3 is a schematic view illustrating a storage state of the belt layer in the belt forming apparatus according to the first embodiment. FIG. 4 is an explanatory diagram illustrating the operation of the belt forming apparatus according to the first embodiment. FIG. 5 is an explanatory diagram illustrating the operation of the belt forming apparatus according to the first embodiment. FIG. 6 is an explanatory diagram illustrating the operation of the belt forming apparatus according to the first embodiment. FIG. 7 is an explanatory diagram illustrating the operation of the belt forming apparatus of the first embodiment. FIG. 8 is an explanatory diagram illustrating the operation of the belt forming apparatus according to the first embodiment. FIG. 9 is an explanatory diagram illustrating the operation of the belt forming apparatus according to the first embodiment. FIG. 10 is an explanatory diagram illustrating the operation of the belt forming apparatus according to the first embodiment. FIG. 11 is a schematic view showing a belt forming apparatus and method according to the second embodiment of the present invention. FIG. 12 is a schematic view showing a belt forming apparatus and method according to the third embodiment of the present invention.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. The constituent elements of this embodiment include those that can be easily replaced by those skilled in the art or those that are substantially the same. Further, the plurality of embodiments described in this embodiment can be arbitrarily combined within the scope obvious to those skilled in the art.

[First Embodiment]
FIG. 1 is a schematic diagram illustrating a belt forming apparatus and method according to a first embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the belt forming apparatus according to the first embodiment, and FIG. 3 is a belt according to the first embodiment. FIG. 4 to FIG. 10 are explanatory views showing the operation of the belt forming apparatus according to the first embodiment.

  Although not shown in the drawings, the pneumatic tire applied in the first embodiment includes a tread portion, shoulder portions disposed on both sides of the tread portion, and sidewall portions and bead portions sequentially continuing from the shoulder portions. It is what is done. And, this pneumatic tire has a carcass layer, an inner liner layer, a first belt layer, a second belt layer, a reinforcing layer, a third belt layer, a fourth belt layer, a belt edge cushion (BEC), a tread layer from the inside. Etc. are laminated.

  The belt forming apparatus forms a part of the belt layer in the pneumatic tire described above. The belt forming apparatus according to the first embodiment includes a first belt layer, a second belt layer, a belt edge cushion, and a reinforcing layer. It is to be molded.

  In the first embodiment, as shown in FIGS. 1 and 2, the belt forming apparatus 10 includes a forming drum 11 that is rotatable and has a plurality of drums, and a belt layer winding that winds a belt layer around the outer peripheral surface of the forming drum 11. It is comprised from the attaching apparatus 13, the cord winding apparatus 14 which winds a reinforcement cord around the outer peripheral surface of the forming drum 11, and the inversion apparatus 15 which reverses the position of each drum in the forming drum 11.

  The forming drum 11 includes a first drum 21 and a second drum 22. The drive shafts 23 and 24 of the first drum 21 and the second drum 22 are arranged on a straight line and are rotatably supported by a support device 25. ing. The first and second driving devices 26 and 27 can rotate the first and second drums 21 and 22 in the forward rotation direction and / or the reverse rotation direction via the drive shafts 23 and 24. The reversing device 15 can reverse the positions of the first and second drums 21 and 22. When the support device 25 is driven by the rotation device 28, the position of the first and second drums 21 and 22 can be reversed by 180 degrees in the lateral direction with the support device 25 as a fulcrum. .

  Further, as shown in FIG. 3, the forming drum 11 (the first drum 21 and the second drum 22) can be attached and detached with a belt layer and a reinforcing layer. The molding drum 11 has a plurality of segments 29 arranged in a ring shape, and the plurality of segments 29 can be synchronously moved in the radial direction by a driving device (not shown). Therefore, in a state where the plurality of segments 29 are moved outward in the radial direction, a belt layer, a reinforcing cord, or the like can be wound around the outside. On the other hand, when each segment 29 is moved inward in the radial direction in a state where the belt layer or the reinforcing cord is wound around the outer side of each segment 29, each segment 29 becomes the inner peripheral surface of the belt layer or the reinforcing cord. The holding can be released at a distance.

  As shown in FIGS. 1 and 2, the belt layer winding device 13 includes a first belt supply device 31 that supplies a first belt (first belt layer) B1 and a second belt (second belt layer) B2. A second belt supply device 32 for supplying and a BEC supply device 33 for supplying a belt edge cushion (BEC) E1 are configured. In this case, the first belt B1 and the second belt B2 are arranged such that the cords covered with rubber have a predetermined angle with respect to the tire circumferential direction, that is, the tire equator line. Further, the first belt B1 and the second belt B2 are disposed so as to intersect with each other's belts in which cords forming an angle with respect to the tire circumferential direction are laminated.

  The cord winding device 14 supplies a steel cord (reinforcing cord) S for forming a reinforcing layer. The cord winding device 14 includes a cord reel 41 that accommodates the steel cord S, a rubber coating machine 42 that continuously coats the steel cord S with rubber, and a feeding device that feeds the steel cord S coated with rubber. A machine 43, a festoon 44 for adjusting the excess or deficiency of the steel cord S by winding the steel cord S between a plurality of vertically movable rollers, a pasting machine 45 for attaching the steel cord S to the forming drum 11, It comprises guide rollers 46 and 47 provided before and after the festoon 44. In this case, the steel cord S coated with rubber is molded so as to be disposed along the tire circumferential direction, that is, along a direction parallel to the tire equator line (approximately 0 degrees, for example, 0 to 5 degrees). The drum 11 is supplied and wound around the outer circumferential surface of the drum 11.

  In the first embodiment, as shown in FIG. 1, a belt layer B (first belt B1, second belt B2, belt edge cushion E1, steel cord S) is wound around the outer peripheral surface of the forming drum 11 by the belt forming apparatus 10. Is stored in this state. And a belt laminated body is shape | molded by another belt shaping | molding apparatus. That is, with respect to the belt layer B (the first belt B1, the second belt B2, the belt edge cushion E1, and the steel cord S) formed by the belt forming apparatus 10, the third belt, the fourth belt, and the belt are arranged on the outer peripheral surface thereof. After winding the edge cushion and the tread, a carcass (not shown) with an inner liner mounted inside is supplied to the inner peripheral surface to form a green tire.

And the belt shaping apparatus 10 of 1st Embodiment comprised in this way can shape | mold a belt with the following processes.
A drum rotating step of rotating the drums 21 and 22 in the molding drum 11;
A belt layer winding step of winding the first and second belts B1 and B2 around the outer peripheral surface of the first drum 21 in the forming drum 11;
A cord winding step of winding the steel cord S around the outer peripheral surface of the second drum in the forming drum 11;
A drum reversing step for reversing the positions of the first and second drums 21 and 22;

  Hereinafter, the belt forming method by the belt forming apparatus 10 of the first embodiment will be specifically described with reference to FIGS.

  In the belt forming method by the belt forming apparatus 10 of the first embodiment, first, as shown in FIG. 4, the first drum 21 in the forming drum 11 is disposed at a position facing the belt layer winding apparatus 13, while the second The drum 22 is disposed at a position facing the cord winding device 14.

  Next, as shown in FIG. 5, the first drum 21 is driven to rotate. On the other hand, the belt layer winding device 13 is operated, the first belt B1 is supplied by the first belt supply device 31, and the first belt B1 is wound around the outer peripheral surface of the rotating first drum 21. Subsequently, the second belt B2 is supplied by the second belt supply device 32, and the second belt B2 is wound around the outer peripheral surface of the rotating first drum 21 (first belt B1). Further, the belt edge cushion E1 is supplied by the BEC supply device 33, and the belt edge cushion E1 is wound around the outer peripheral surface of the rotating first drum 21 (belts B1, B2).

  Then, when the first belt B1, the second belt B2, and the belt edge cushion E1 are wound around the outer peripheral surface of the first drum 21, as shown in FIG. The positions of the first drum 21 and the second drum 22 are reversed. That is, the first drum 21 in the forming drum 11 is disposed at a position facing the cord winding device 14, while the second drum 22 is disposed at a position facing the belt layer winding device 13. In this state, the cord winding device 14 is operated to supply the steel cord S, and the steel cord S is wound around the outer peripheral surfaces of the first belt B1, the second belt B2, and the belt edge cushion E1 in the rotating first drum 21. To go.

  On the other hand, as shown in FIG. 7, the second drum 22 is driven to rotate, and the second drum 22 is driven to rotate. On the other hand, the belt layer winding device 13 is operated, the first belt B1 is supplied by the first belt supply device 31, and the first belt B1 is wound around the outer peripheral surface of the rotating second drum 22. Subsequently, the second belt B2 is supplied by the second belt supply device 32, and the second belt B2 is wound around the outer peripheral surface of the rotating second drum 22 (first belt B1). Further, the belt edge cushion E1 is supplied by the BEC supply device 33, and the belt edge cushion E1 is wound around the outer peripheral surface of the rotating belt second drum 22 (belts B1, B2).

  When the winding of the steel cord S is completed in the first drum 21 as shown in FIG. 8, the steel cord S is cut and terminal processing is performed. Then, as shown in FIG. 9, the forming drum 11 is rotated 180 degrees by the rotating device 28, and the positions of the first drum 21 and the second drum 22 are reversed. That is, the first drum 21 in the forming drum 11 is disposed at a position facing the belt layer winding device 13, while the second drum 22 is disposed at a position facing the cord winding device 14. In this state, the cord winding device 14 is operated with respect to the second drum 22, the steel cord S is supplied, and the first belt B1, the second belt B2, and the belt edge cushion E1 in the rotating second drum 22 are rotated. The steel cord S is wound around the outer peripheral surface.

  On the other hand, since the first belt B1, the second belt B2, the belt edge cushion E1, and the steel cord S are wound around the first drum 21, as shown in FIG. 10, from the first drum 21 to the first belt B1. The belt layer B composed of the second belt B2, the belt edge cushion E1, and the steel cord S is removed and stored. And as shown in FIG. 5, the belt layer winding apparatus 13 is operated with respect to the 1st drum 21, and the process after FIG. 6 is performed repeatedly.

  When the winding of the steel cord S is completed in the second drum 22, the steel cord S is cut and subjected to terminal processing, and the forming drum 11 is rotated 180 degrees by the rotating device 28, and the first drum 21 and the second drum 22 are rotated. The position of the drum 22 is reversed. Since the first belt B1, the second belt B2, the belt edge cushion E1, and the steel cord S are wound around the second drum 22, the first belt B1, the second belt B2, and the belt are wound from the second drum 22. The belt layer B made of the edge cushion E1 and the steel cord S is removed and stored. Then, the processes from FIG. 7 are repeated on the second drum 22.

  Since the belt layer B composed of the first belt B1, the second belt B2, the belt edge cushion E1, and the steel cord S is formed in this way, although not shown, the belt layer B has a second outer circumferential surface on the outer circumferential surface. After the third belt B3, the fourth belt B4, the belt edge cushion E2 and the tread T are wound in order, an inner liner is mounted on the inner side of the carcass and supplied to the inner peripheral surface to form a grain tire.

  As described above, in the belt forming apparatus of the first embodiment, the forming drum 11 having the plurality of rotatable drums 21 and 22, and the first and second belts B 1 and B 2 and the belt on the outer peripheral surface of the forming drum 11. A belt layer winding device 13 for winding the edge cushion E1, a cord winding device 14 for winding the steel cord S around the outer peripheral surface of the forming drum 11, and a reversing device 15 for reversing the positions of the drums 21 and 22 are provided. .

  Accordingly, the first and second belts B1 and B2 and the belt edge cushion E1 are wound around the outer peripheral surface of the forming drum 11 by the belt layer winding device 13 while rotating the forming drum 11, and the forming drum 11 is wound by the cord winding device 14. The steel cord S is wound around the outer circumferential surface of the belt, and when the first and second belts B1, B2, the belt edge cushion E1, and the steel cord S are completely wound, the reversing device 15 reverses the position of the forming drum 11 and again 1. The winding operation of the second belts B1 and B2 and the steel cord S is performed. Therefore, the belt layer B composed of the belts B1 and B2 and the steel cord S can be easily formed, and the tire productivity can be improved by performing the tire forming operation continuously and efficiently.

  Further, in the belt forming apparatus of the first embodiment, the first and second belts B1 and B2, the belt edge cushion E1 and the steel cord S can be continuously wound around the outer peripheral surface of the forming drum 11, and assembling work can be performed. Workability can be improved.

  In the belt forming apparatus according to the first embodiment, the first and second drums 21 and 22 are movably supported as the forming drum 11, and the belt layer is provided to one of the first and second drums 21 and 22. The winding device 13 winds the first and second belts B1 and B2 and the belt edge cushion E1, and the cord winding device 14 winds the steel cord S around the other. Therefore, the first and second belts B1 and B2, the belt edge cushion E1 and the steel cord S can be wound simultaneously using the plurality of drums 21 and 22, and the workability of the assembling work in the reinforcing layer and the belt layer can be performed. Can be improved.

  In the belt forming apparatus of the first embodiment, the belt layer winding apparatus 13 can wind a plurality of belts B1 and B2 made of rubber cords having a predetermined inclination angle around the tire equator line. In B1 and B2, rubber cords intersect each other. Accordingly, it is possible to easily form the reinforcing layer made of the steel cord S substantially parallel to the tire equator line and the belts B1 and B2 that are inclined to the tire equator line and intersect each other.

  Further, in the belt forming method of the first embodiment, the belt B1 is provided on the outer peripheral surface of the first drum 21 in the forming drum 11 and the drum rotating step of rotating the first and second drums 21 and 22 in the forming drum 11. , B2 and E1, and a cord winding step of winding the steel cord S around the outer peripheral surface of the second drum 11 in the forming drum 11.

  Accordingly, the belts B1, B2, and E1 are wound around the outer peripheral surface of the first drum 21 while the first and second drums 21 and 22 are rotated, and the steel cord S is wound around the outer peripheral surface of the second drum 22. In addition to the belt layer, the reinforcing layer composed of the steel cord S and the belts B1, B2, and E1 can be formed, and the tire forming operation is continuously performed efficiently to improve the tire productivity. be able to.

  In the belt forming method of the first embodiment, the belts B1, B2, and E1 are wound around the outer peripheral surface of the first drum 21 of the forming drum 11, and the steel cord S is wound around the outer peripheral surface of the second drum 22 of the forming drum 11. After that, the positions of the drums 21 and 22 are reversed, the steel cord S is wound around the outer peripheral surface of the first drum 21, and the belts B1, B2, and E1 are wound around the outer peripheral surface of the second drum 22. Accordingly, after the belts B1, B2, E1 and the steel cord S are wound around the different drums 21, 22, the positions of the drums 21, 22 are reversed, and then the steel cord S and the belt are wound around the drums 21, 22. Since B1, B2, and E1 are wound, it is not necessary to move the winding devices 13 and 14, and workability can be improved.

[Second Embodiment]
FIG. 12 is a schematic view showing a belt forming apparatus and method according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as embodiment mentioned above, and detailed description is abbreviate | omitted.

  The belt forming apparatus forms a part of the belt layer in the pneumatic tire. The belt forming apparatus according to the second embodiment includes the first belt layer, the second belt layer, the reinforcing layer, the third belt layer, and the first belt layer. Four belt layers are formed.

  In the second embodiment, as shown in FIG. 12, the belt forming device 60 includes a rotatable forming drum 11, a belt layer winding device 61 that winds a belt layer around the outer peripheral surface of the forming drum 11, and the forming drum 11. A cord winding device 14 for winding a reinforcing cord around the outer peripheral surface and a reversing device 15 for reversing the position of each drum in the forming drum 11 are configured.

  The forming drum 11 includes a first drum 21 and a second drum 22, and the first drum 21 and the second drum 22 are rotatably supported by a support device 25. The reversing device 15 can reverse the positions of the first and second drums 21 and 22. When the support device 25 is driven by the rotation device 28, the position of the first and second drums 21 and 22 can be reversed by 180 degrees in the lateral direction with the support device 25 as a fulcrum. .

  The belt layer winding device 61 includes a first belt supply device 31 that supplies a first belt B1, a second belt supply device 32 that supplies a second belt B2, and a BEC supply that supplies a belt edge cushion (BEC) E1. A device 33, a third belt supply device 101 for supplying a third belt B3, a fourth belt supply device 102 for supplying a fourth belt B4, a BEC supply device 103 for supplying a belt edge cushion (BEC) E2, The tread supply device 104 supplies the tread T.

  The cord winding device 14 includes a cord reel 41, a rubber coating machine 42, a feeding machine 43, a festoon 44, a pasting machine 45, and guide rollers 46 and 47.

  In the second embodiment, the belt layer B (first belt B1, second belt B2, belt edge cushion E1, steel cord S, third belt B3, fourth belt) is formed on the outer peripheral surface of the forming drum 11 by the belt forming device 60. After the belt B4, the belt edge cushion E2, and the tread T) are wound, the belt B4 is stored in this state. And a belt laminated body is shape | molded by another belt shaping | molding apparatus. That is, the belt layer B (first belt B1, second belt B2, belt edge cushion E1, steel cord S, third belt B3, fourth belt B4, belt edge cushion E2, tread T formed by the belt forming device 60. ) Is supplied to the inner peripheral surface of the carcass (not shown) with an inner liner attached to form a green tire.

  Thus, in the belt forming apparatus and method of the second embodiment, the forming drum 11 having a plurality of rotatable drums 21 and 22, and the first, second, third, Belt layer winding device 61 for winding the fourth belts B1, B2, B3, B4, belt edge cushions E1, E2, and tread T, the cord winding device 14 for winding the steel cord S around the outer peripheral surface of the forming drum 11, and each drum A reversing device 15 for reversing the positions 21 and 22 is provided.

  Therefore, while rotating the forming drum 11, the belt layer winding device 61 winds the first and second belts B1, B2 and the belt edge cushion E1 around the outer peripheral surface of the forming drum 11, and the reversing device 15 positions the forming drum 11. The cord winding device 14 winds the steel cord S around the outer peripheral surfaces of the first and second belts B1 and B2, the reversing device 15 reverses the position of the forming drum 11, and the belt layer winding device 61 The third and fourth belts B3 and B4, the belt edge cushion E1 and the tread T are wound around the outer peripheral surface of the steel cord S, and the belts B1 and B2, the belt edge cushion E1, the steel cord S, the belts B3 and B4, and the belt edge cushion. A belt layer B made of E2 and a tread T is formed. Therefore, the belt layer B composed of the belts B1 and B2, the belt edge cushion E1, the steel cord S, the belts B3 and B4, the belt edge cushion E2 and the tread T can be easily formed, and the tire forming operation can be efficiently performed. If done well, the productivity of the tire can be improved.

[Third Embodiment]
FIG. 12 is a schematic view showing a belt forming apparatus and method according to the third embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as embodiment mentioned above, and detailed description is abbreviate | omitted.

  The belt forming apparatus forms a part of the belt layer in the pneumatic tire. The belt forming apparatus according to the fourth embodiment includes a first belt layer, a second belt layer, a reinforcing layer, a third belt layer, and a first belt layer. Four belt layers and a tread layer are formed.

  In the third embodiment, as shown in FIG. 12, the belt forming device 70 includes a rotatable forming drum 71, two belt layer winding devices 72 and 73 that wind the belt layer around the outer peripheral surface of the forming drum 71, The cord winding device 14 winds a reinforcing cord around the outer peripheral surface of the forming drum 71, and a reversing device 74 that reverses the position of each drum in the forming drum 71.

  The forming drum 71 includes a first drum 81, a second drum 82, and a third drum 83 that are arranged at equal intervals (equal angle = 120 degrees) in the circumferential direction, and each of the drums 81, 82, 83 is a support device 84. Is supported rotatably. The reversing device 74 can reverse the positions of the first, second, and third drums 81, 82, and 83. The support device 84 is driven by a rotating device (not shown), and the position of the drum can be changed by rotating the drums 81, 82, 83 by 120 degrees in the lateral direction with the support device 84 as a fulcrum. it can.

  The first belt layer winding device 72 includes a first belt supply device 31 that supplies a first belt B1, a second belt supply device 32 that supplies a second belt B2, and a BEC that supplies a belt edge cushion (BEC) E1. And a supply device 33. The second belt layer winding device 73 supplies a third belt supply device 101 that supplies a third belt B3, a fourth belt supply device 102 that supplies a fourth belt B4, and a belt edge cushion (BEC) E2. The BEC supply device 103 and the tread supply device 104 that supplies the tread T are configured.

  The cord winding device 14 includes a cord reel 41, a rubber coating machine 42, a feeding machine 43, a festoon 44, a pasting machine 45, and guide rollers 46 and 47.

  In the third embodiment, the belt layer B (the first belt B1, the second belt B2, and the belt edge cushion E1 is wound around the outer peripheral surface of the forming drum 71 by the first belt layer winding device 72 of the belt forming device 70. After the forming drum 71 is reversed and the steel cord S is wound by the cord winding device 14, the forming drum 71 is further reversed and the second belt layer winding device 73 causes the third belt B3 and the fourth belt 4 to be reversed. After the belt B4, the belt edge cushion E2, and the tread T) are wound, the belt B4 is stored in this state. The belt layer B (first belt B1, second belt B2, belt edge cushion E1, steel cord S, third belt B3, fourth belt B4, belt edge cushion E2, tread T) is not shown. A carcass with an inner liner attached is supplied to the inner peripheral surface to form a green tire.

  As described above, in the belt forming apparatus and method according to the third embodiment, the first, second, and third drums 81, 82, and 83 are movably supported by the reversing device 74 as the forming drum 71, and the first, The first belt layer winding device 72 winds the first and second belts B1 and B2 around one of the second and third drums 81, 82, 83, and the cord winding device 14 against one. Winds the steel cord S, and the second belt layer winding device 73 winds the third and fourth belts B3 and B4 and the tread T on one. Accordingly, the belts B1, B2, B3, B4, the steel cord S, and the tread T can be simultaneously wound using the plurality of drums 81, 82, 83, and the workability of the assembling work in the reinforcing layer and the belt layer can be performed. Can be improved.

  In each of the embodiments described above, the cord winding device 14 is configured to continuously wind one steel cord S. However, a plurality of steel cords S may be wound in order or simultaneously. Good. According to this configuration, the winding time of the steel cord S can be shortened by dividing and winding the steel cord S while rotating the forming drums 11, 51, 71.

10, 60, 70 Belt forming device 11, 71 Forming drum 13, 61, 72, 73 Belt layer winding device 14 Cord winding device 15, 74 Reversing device 21, 81 First drum 22, 82 Second drum 25, 84 Support device 28 Rotating device 31 First belt supply device 32 Second belt supply device 33 BEC supply device 83 Third drum 101 Third belt supply device 102 Fourth belt supply device 103 BEC supply device 104 Tread supply device B Belt layer B1 First 1 belt (first belt layer)
B2 Second belt (second belt layer)
B3 3rd belt (3rd belt layer)
B4 4th belt (4th belt layer)
E1, E2 Belt edge cushion (BEC)
S Steel cord (reinforcement cord, reinforcement layer)
T tread

Claims (8)

A forming drum having a plurality of rotatable drums;
A reversing device for reversing the position of each drum;
A belt layer winding device for winding a belt layer around the outer peripheral surface of each drum;
A cord winding device for winding a reinforcing cord along a direction substantially parallel to the tire equator line on the outer peripheral surface of each drum;
A belt forming apparatus comprising:   The belt forming apparatus according to claim 1, wherein the belt layer winding apparatus includes an inner belt winding apparatus that winds one or a plurality of inner belt layers inside the reinforcing cord.   The belt forming apparatus according to claim 1, wherein the belt layer winding apparatus includes an outer belt winding apparatus that winds one or more outer belt layers around the reinforcing cord.   The belt layer winding device is capable of winding a plurality of belts composed of rubber cords having a predetermined inclination angle around a tire equator line, and the rubber cords of the belts cross each other. The belt forming apparatus according to claim 1. A drum rotating step of rotating a plurality of drums in the forming drum;
A belt layer winding step of winding a belt layer around the outer peripheral surface of one drum in the molding drum;
A cord winding step of winding a reinforcing cord around the outer peripheral surface of one drum in the molding drum;
A belt forming method characterized by comprising:   The belt layer is wound around the outer peripheral surface of one drum of the molding drum, the reinforcing cord is wound around the outer peripheral surface of the other drum of the molding drum, and then the positions of the respective drums are reversed, A belt forming method, wherein the reinforcing cord is wound around an outer peripheral surface, and the belt layer is wound around the outer peripheral surface of the other drum.   The inner belt layer is wound around the outer peripheral surface of the drum in the belt layer winding step, and then the reinforcing cord is wound around the outer peripheral surface of the inner belt layer in the cord winding step. Item 6. A belt forming method according to Item 5.   The outer belt layer is wound around the outer peripheral surface of the reinforcing cord in the belt layer winding step after the reinforcing cord is wound around the outer peripheral surface of the drum in the cord winding step. 5. The belt forming method according to 5.

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