WO2010090099A1

WO2010090099A1 - Tire manufacturing device and tire manufacturing method

Info

Publication number: WO2010090099A1
Application number: PCT/JP2010/050959
Authority: WO
Inventors: 佳克篠; 隆桑原; 則生今山
Original assignee: 株式会社ブリヂストン
Priority date: 2009-02-04
Filing date: 2010-01-26
Publication date: 2010-08-12
Also published as: JP5339431B2; JP2010179504A

Abstract

During formation of an unvulcanized tire, air between layers of a rubber strip is reliably discharged without an increase in the cycle time required to layer layers of the rubber strip and to attach the layers together by pressure. An unvulcanized tire is formed by forming a rubber member of each part of the tire by sequentially and helically layering layers of a rubber strip (G) on the outer surface of a body, on which the unvulcanized tire is to be formed, in such a manner that the layers are layered on each other on the rear side of the layering direction (S). A pressing roller (21) is moved relative to and along the rear edges (G1) of the layers in the layering direction (S) in synchronism with the layering operation while being caused to press the rear edges (G1). By this action, the pressing roller (21) presses the layers of the rubber strip (G) at regions on the rear side in the layering direction (S). The pressing action moves air between the layers of the rubber strip (G) forward in the layering direction (S) to discharge the air to the outside from between the layers and attaches the layers together by pressure.

Description

Tire manufacturing apparatus and tire manufacturing method

The present invention relates to a tire manufacturing apparatus and a tire manufacturing method for manufacturing an unvulcanized tire by winding and laminating a rubber strip around an outer surface of a molded body.

A pneumatic tire is manufactured by forming each unvulcanized tire by sequentially arranging each tire constituent member made of unvulcanized rubber or the like on a molded body, and then performing vulcanization molding. Conventionally, a rubber member such as a tread rubber is formed by laminating a rubber strip on a molding drum with a laminating roller at the time of molding the unvulcanized tire (see Patent Document 1).

In this conventional tire manufacturing apparatus, a laminating roller and a pressing roller of a rubber strip disposed below the same are attached to the same plate, both rollers are moved together, and are wound around a forming drum by the pressing roller and laminated. Press the strip. As a result, the rubber strips are stitched in synchronism with the lamination on the molding drum, and are pressed against each other while discharging air between the rubber strips.

However, in this conventional tire manufacturing apparatus, it is difficult to confirm the pressing roller being stitched by the laminated roller, and the pressing state of the rubber strip may not be accurately grasped. In addition, since both rollers move integrally, it is not possible to freely adjust the position and angle of pressing by the pressing roller, and setting the timing of pressing, and depending on the width and pressing position of the pressing roller, the rubber strip There is a possibility that the whole or an appropriate range cannot be pressed. As a result, in this conventional tire manufacturing apparatus, the rubber strip cannot be pressed appropriately, and the interlayer air between the laminated rubber strips or between the rubber strip and the lower layer member is not reliably discharged, and the air is sealed in the member. May remain and the tire may be inflated.

On the other hand, for example, independently of the lamination of the lamination rollers, the surface of the rubber strip is sequentially pressed by the pressure roller and stitched over the entire surface, and the interlayer air is sequentially discharged to suppress the remaining of the air. Conceivable. However, if it does in this way, it will be necessary to press in multiple places of the width direction of a rubber strip, and the moving speed (rubber strip of a rubber strip) will move with respect to the moving speed (rubber strip laminating speed) of a lamination roller. Stitching speed is slow. Therefore, even if both operations are started at the same time, stitching is continued after the end of lamination, and the overall cycle time required for lamination and pressure bonding of rubber strips becomes longer. Also, when laminating a plurality of layers by overlapping rubber strips, the laminating roller that wraps the first layer and turns back to the second layer waits until the stitching of the laminated rubber strips of the first layer is completed. It is necessary to let As a result, there arises a problem that the total time until the end of the entire lamination of the rubber strips becomes longer, and the cycle time of the lamination and pressure bonding of the rubber strips becomes longer according to the number of laminations.

In addition, conventionally, for example, when tread rubber is formed by laminating rubber strips, the rubber strip is sufficiently formed at the ends of the base rubber on the inner layer side (base tread) and the cap rubber on the outer layer side (cap tread). It may not be possible to press strongly. Therefore, before laminating the side wall rubber on the tire side, the rubber strips once laminated and pressed are pressed and pressed again around each end, depending on the working time. Therefore, the cycle time tends to be long.

JP 2003-1723 A

The present invention has been made in view of such a conventional problem, and an object of the present invention is to prevent an increase in cycle time required for laminating and crimping rubber strips when molding an unvulcanized tire. On the other hand, the interlayer air is surely discharged to suppress the remaining of the air.

The present invention includes a rubber strip supplying means and a laminating means for sequentially winding and laminating the supplied rubber strip along the outer surface of the molding object, and molding the rubber slip at least on the rear side in the laminating direction. A tire manufacturing apparatus for forming an unvulcanized tire by laminating on a body, a pressing member that presses and presses a rubber strip wound around a molded body, and an edge on the rear side in the stacking direction of the rubber strip And a moving means that presses against the portion and relatively moves along the edge portion.
The present invention also includes a step of sequentially winding and laminating rubber strips along the outer surface of the molded body, and laminating rubber slips at least on the rear side in the laminating direction and laminating them on the molded body. A step of pressing a pressing member against the edge of the rubber strip wound around the molded body on the rear side in the laminating direction, and the pressing member pressed against the edge on the rear side in the laminating direction at the edge And a step of pressing the rubber strips in order and crimping them in order relative to each other.

According to the present invention, when molding an unvulcanized tire, the cycle time required for laminating and crimping rubber strips is prevented, and interlayer air is reliably discharged to suppress residual air. Can do.

It is a principal part side view which shows typically schematic structure of the tire manufacturing apparatus of this embodiment. It is principal part sectional drawing which shows typically the state of the laminated rubber strip and the press roller during stitching. It is the principal part top view which looked at the tire manufacturing apparatus which is laminating | stacking a rubber strip from the upper direction of FIG. It is principal part sectional drawing which shows the stitched rubber strip typically.

Hereinafter, an embodiment of a tire manufacturing apparatus and a tire manufacturing method of the present invention will be described with reference to the drawings.
The tire manufacturing apparatus and manufacturing method according to the present embodiment form a rubber member that constitutes each part of the tire, such as tread rubber and sidewall rubber, for example, by laminating at least a part of the rubber strip and winding and laminating the molded body. To manufacture (mold) unvulcanized tires. At this time, in the tire manufacturing apparatus and manufacturing method, a predetermined position of the laminated rubber strip is pressed and stitched, and then sequentially pressed to form a rubber member.

FIG. 1 is a side view of an essential part schematically showing a schematic configuration of the tire manufacturing apparatus.
As shown in the figure, the tire manufacturing apparatus 1 includes a support body 2 whose axis is disposed horizontally (in the longitudinal direction of the drawing in the drawing), and rubber strips G provided on both outer sides in the radial direction (left and right in the drawing). A supply means 10 and a stitching device 20, and a rubber strip G stacking means 40 disposed between the support 2 and the supply means 10 are provided. Moreover, in this tire manufacturing apparatus 1, the supply means 10 and the stitching apparatus 20 are independent, and on the opposite sides (here, 180 ° apart from the support body 2) on both sides of the support body 2, respectively. It is arranged opposite to the support 2.

The support 2 supports, for example, a cylindrical molding drum that can be expanded and contracted, or an outer shape corresponding to the inner shape of the unvulcanized tire, for supporting the molding H so as to be rotatable around the axis when the unvulcanized tire is molded. A rigid core having Here, the support body 2 is a molding drum that can rotate around an axis, and a molded body H is formed by sequentially arranging or laminating tire constituent members and rubber strips G on the outer peripheral side thereof. Hold H concentrically in an expanded state. Further, the support 2 has a rotation drive means (not shown) including a drive source such as a motor and a transmission mechanism of the rotation power thereof, and is driven to rotate by this so that the molding H is moved around the axis. It is rotated at a predetermined rotation speed (arrow K in the figure) and stopped at an arbitrary rotation angle.

Here, the rubber strip G is a long rubber member formed in a ribbon shape, a belt shape, or the like, and is supplied from the supply means 10 to the molded object H via the lamination means 40. Further, the molded body H is an object to be laminated with the rubber strip G wound around when molding an unvulcanized tire, and an unvulcanized tire or work-in-process in the middle of molding on the support 2 or Includes intermediate molded bodies. Alternatively, when the rubber strip G is directly laminated on the support 2, a molding drum or a rigid core constitutes the molding H.

The supply means 10 includes an extruder 11 (only the tip side is shown in the figure) that extrudes the unvulcanized rubber by heating and kneading, and a gear pump, an extrusion head, etc. (not shown) at the rubber extrusion tip (rubber discharge port). The tip 12 of the base 12 is disposed so as to face the outer surface of the molded body H with the stacking means 40 interposed therebetween. The supply means 10 operates the extruder 11 to extrude unvulcanized rubber from the opening of the base 12 (arrow D in the figure), and forms a rubber strip G in a predetermined cross-sectional shape corresponding to the opening shape. Then, it is continuously supplied to the molded body H at a predetermined speed. Further, the supply means 10 moves the extruder 11 together with the stacking means 40 in the axial direction, the radial direction, etc. of the molded body H and moves around the outer surface of the molded body H (see FIG. Not shown). Thereby, the supply means 10 moves the extruder 11 and the laminating means 40 integrally according to the extrusion speed of the rubber strip G and the laminating position on the molded body H, and the object to be rotated via the laminating means 40. A rubber strip G is supplied to a predetermined position of the molded body H.

Here, the laminating means 40 is a roller head connected to the extruder 11, and has a pair of

rollers

41 and 42 supported so as to be rotatable around an axis, and a rotation driving means (not shown). Then, the supplied rubber strip G is passed between a pair of rotating

rollers

41 and 42, and is wound around the object H by one roller 41. Each of the

rollers

41 and 42 has a cylindrical shape or a disk shape, and a lower roller 41 having a larger diameter is disposed in the vicinity of the outer surface of the support 2, and an upper roller 42 having a smaller diameter is disposed above the lower roller 41. They are arranged to face each other with a predetermined gap between their outer peripheral parts. These

rollers

41 and 42 are respectively a winding (lamination) and rolling roller for the rubber strip G, and are supported with their axes parallel to each other, and on the rubber inlet side on one side (right side in the figure) between them, The rubber strip G extruded from 12 is guided and continuously supplied.

The laminating means 40 rotates these

rollers

41 and 42 in synchronization with each other in the opposite directions (arrows in the figure), rolls the rubber strip G supplied between the

rollers

41 and 42, and according to the interval between the outer peripheral portions. A predetermined cross-sectional shape with a thickness is formed. Subsequently, the laminating means 40 holds the rubber strip G that has passed between the

rollers

41 and 42 on the outer peripheral surface of the rotating lower roller 41, and moves it to a predetermined winding position of the workpiece H that rotates in conjunction with the rotating roller 40. And press and paste on the outer surface. In this way, the laminating means 40 affixes the rubber strip G supplied from the supplying means 10 to the molded body H, for example, the outer surface or lower rubber strip G of the support 2 or an already disposed tire constituent member. Then, they are continuously wound spirally in the circumferential direction and laminated. At that time, the tire manufacturing apparatus 1 gradually moves the laminating means 40 along the outer surface of the molded body H together with the extruder 11 by the moving means described above, and the supplied rubber strip G is moved to the molded body H. It winds in order along an outer surface, and laminates | stacks toward predetermined directions, such as the radial direction and an axial direction.

The stitching device 20 includes a pressing member (here, a disk-shaped or cylindrical pressing roller) 21 that presses the rubber strip G, and a moving means 30 that moves the pressing roller 21 against a predetermined position of the rubber strip G. And the pressing roller 21 presses and pressure-bonds the rubber strip G wound around the molded body H and stacked. In addition, the moving unit 30 includes a holder 31 that supports the pressing roller 21 so as to be rotatable about an axis, and a pressing unit 32 that presses the pressing roller 21 against the molded body H via the holder 31. Further, the moving means 30 displaces the pressing means 32 in the axial direction of the molded body H, and moves the pressing roller 21 along the outer surface of the molded body H, and the pressing means 32 rotates in the horizontal plane. And a rotation mechanism (not shown) for arbitrarily changing the pressing angle of the pressing roller 21 against the molded body H.

Specifically, the pressing means 32 has a piston / cylinder mechanism arranged toward the axis along the radial direction (left-right direction in the figure) of the support 2, and moves forward and backward from the cylinder 32S (arrow J in the figure). The holder 31 is attached to the tip of the piston rod 32P. The stitching device 20 operates the pressing means 32 to bring the pressing roller 21 close to and away from the molding target H, and the outer peripheral surface (pressing surface) of the pressing roller 21 is brought into contact with the molding target H so as to reach the axis. Press at a predetermined pressure toward Thereby, the stitching device 20 presses and stitches the laminated rubber strips G, discharges the interlayer air between the rubber strips G and between the rubber strip G and the lower layer member, and Crimp the other member on the lower layer side.

Further, the stitching device 20 rotates the pressing means 32 while displacing the molded body H around the molding body H by the above-described mechanisms of the moving means 30. Accordingly, the pressing roller 21 pressed against the molding target H is moved along the outer surface of the molding target H, and the pressing roller 21 is moved along the outer surface of the molding target H together with the rotation of the molding target H by the support 2. Relative movement (rolling) is performed spirally along the circumferential direction. At the same time, the stitching device 20 appropriately changes the angle of the pressing roller 21 according to the pressing position to the molding H, the inclination of the surface of the laminated rubber strip G, etc., and the moving pressing roller 21 is moved at a predetermined angle. Press against rubber strip G. In this way, the stitching device 20 moves the pressing roller 21 while pressing a predetermined range on the outer surface of the molding H in synchronization with the lamination of the rubber strips G, so that the entire rubber strips G are laminated. Or the necessary range is stitched and crimped.

FIG. 2 is a main part sectional view schematically showing the state of the laminated rubber strip G and the pressing roller 21 during stitching. In the figure, a part of the cross section in the width direction of the molding H is shown. A molding object H is located below the rubber strip G.
As shown in the figure, the pressing roller 21 is formed in a convex curved surface whose outer peripheral surface is gently curved with a predetermined curvature, and the outer peripheral surface is pressed against a predetermined position of the laminated rubber strip G to press the rubber strip G. To do. As a result, the rubber strip G is deformed in the pressing direction (arrow P in the figure) in accordance with the outer peripheral surface of the pressing roller 21 and is pressed against the lower rubber strip G, etc. Discharged (arrow F in the figure) and crimped.

Here, in this embodiment, when the rubber strip G is laminated in the predetermined direction along the outer surface of the molded body H (arrow S in the figure), the rubber strip G is at least laminated in the laminating direction S by the laminating means 40. Are stacked on the molded body H in an overlapping manner on the rear side (the rear side in the movement direction of the stacking means 40 with respect to the molded body H) (left side in the figure). That is, the tire manufacturing apparatus 1 winds the rubber strip G by gradually displacing and winding the rubber strip G in the stacking direction S so that at least the rear side in the stacking direction S overlaps, and the edge G1 on the rear side in the stacking direction S (on the side in the width direction). Yes, hereinafter, a part or all (here, a part) including the rear side edge part are overlapped with each other and sequentially stacked. In this way, the tire manufacturing apparatus 1 forms a rubber member having a predetermined shape by laminating one or more layers of the rubber strip G on the molded body H, and forms an unvulcanized tire in a predetermined procedure. .

At that time, the tire manufacturing apparatus 1 presses and presses the pressing roller 21 against the rear side edge G1 of the rubber strip G by the moving means 30, and in this state, the rubber strip G is stacked on the molded body H, and In synchronization with the rotation of the molded body H, the pressing roller 21 is moved in the stacking direction S. As a result, the rubber strip G is deformed by the pressure of the pressure and brought into contact with the outer peripheral surface of the opposing pressure roller 21, and at the same time, the pressure roller 21 is relatively moved along the rear edge G1. The rubber strip G is pressed by a predetermined range on the rear side in the stacking direction S including the rear side edge G1 by the outer peripheral surface of the pressing roller 21, and at least the rear side edge G1 is pressed while the rear side edge. Stitched along G1. At the time of this stitching, the stitching device 20 of the present embodiment presses the rubber strip G so as not to exceed a half range in the width direction. Here, when the width of the rubber strip G is W, the rear side A range from W / 3 to W / 2 is pressed in the width direction from the edge G1.

Moreover, in this tire manufacturing apparatus 1, the width, outer surface shape, or pressing position of the pressing roller 21 is set so as to press at least the overlapping range of the rubber strip G on the rear side in the stacking direction S. The overlapping area of the strips G is sequentially pressed along the longitudinal direction. In response to this pressing, the rubber strip G mainly moves to the front side in the stacking direction S, and is sequentially discharged from between the members toward the front in the stacking direction S where the rubber strip G is not stacked. Crimp around the overlapping area. In addition, here, the pressing angle of the pressing roller 21 is adjusted by the moving means 30, and the pressing roller 21 is arranged so that the angle between the radial direction and the surface of the rubber stop G is a right angle. Is pressed against the rear edge G1 in a direction perpendicular to the surface pressed by the rubber strip G. The pressing roller 21 presses the rubber strip G so as not to exceed the half of the rear side in the stacking direction S, that is, the front end of the pressing region of the pressing roller 21 in the stacking direction S is By pressing the rubber strip G so as to be on the rear side in the laminating direction S from the half position in the width direction of the rubber strip G, the interlayer air at the lower part on the front side in the laminating direction S of the rubber strip G Therefore, it is possible to prevent the interlayer air from being collected at the center of the direction and to reliably discharge the interlayer air to the front side in the stacking direction S. Therefore, the pressing roller 21 presses the rubber strip G so as not to exceed a half range in the width direction, and more preferably, W / 3 or more and W / 2 or less in the width direction from the aforementioned rear side edge portion G1. It is preferable to press in the range. Here, the pressing area of the pressing roller 21 refers to an area where the pressing roller 21 is in contact with the rubber strip G.

Next, a description will be given of the procedure and operation for manufacturing the tire by forming the rubber member of each part of the tire by laminating the rubber strip G on the molded body H and molding the unvulcanized tire by the tire manufacturing apparatus 1. The following procedures and the like are controlled by a control device (not shown) and executed by causing each unit of the devices connected based on a predetermined program to perform related operations at preset timings and conditions. This control apparatus is composed of, for example, a microprocessor (MPU), a computer (ROM) that stores various programs (Read Only Memory), and a RAM (Random Access Memory) that temporarily stores data directly accessed by the MPU. Each part of the apparatus is connected via connection means. Thereby, a control apparatus transmits / receives a control signal and various data with each part of an apparatus, and performs each operation | movement regarding unvulcanized tire shaping | molding, respectively.

FIG. 3 is a plan view of a main part of the tire manufacturing apparatus 1 in which the rubber strip G is being stacked as viewed from above in FIG. FIG. 4 is a main part sectional view schematically showing the stitched rubber strip G, and shows a part of the cross section in the width direction of the molding H.
As shown in FIG. 3, the tire manufacturing apparatus 1 gradually moves the laminating means 40 along the outer surface of the molded body H (in FIG. 3, the pre-movement is indicated by a dotted line), and continuously supplied rubber strip G. Are wound in order along the outer surface of the body H to be laminated. Here, the rubber strip G is spirally wound from the shoulder portion H1 to the tread portion H2 of the molded body H, and is overlapped at least on the rear side in the stacking direction S in the tire width direction (upward in FIG. 3). Are sequentially laminated on the molding H.

At the same time, the tire manufacturing apparatus 1 stitches the rubber slip G wound around the molded body H and laminated by the stitching apparatus 20 in synchronization with the lamination. Specifically, as described above, first, the pressing roller 21 is pressed against the rear side edge G1 of the rubber strip G wound around the molded body H. Subsequently, the pressing roller 21 gradually moves along the outer surface of the molded body H in accordance with the stacking speed and position while pressing a predetermined range of the rubber strip G (in FIG. 3, the pre-movement is indicated by a dotted line). The rubber strip G located at the forefront in the stacking direction S is pressed. At that time, the pressing roller 21 pressed against the rear edge G1 is relatively moved along the rear edge G1, and the rubber strips G are sequentially pressed in accordance with the lamination (in FIG. 4, they are pressed in the order of arrows T1 to T6). And crimp. Here, the pressing roller 21 presses at least the overlapping range on the rear side in the stacking direction S of the rubber strip G, and the pressing roller 21 presses the pressing roller 21 against the rear edge G1. Is pushed in a direction perpendicular to the direction, and is relatively moved along the rear side edge G1 in this state.

The tire manufacturing apparatus 1 presses the rubber strip G in this way, and sequentially discharges the interlayer air while deforming the rubber strip G so that the rubber strips G and the rubber strip G and the lower layer member are in close contact with each other without any gap. Crimp. Further, the tire manufacturing apparatus 1 repeats the same procedure as described above to form one or a plurality of rubber members in a predetermined order, and to form an unvulcanized tire by assembling other tire constituent members. Thereafter, the unvulcanized tire is removed from the support 2 and vulcanized and molded to produce a product tire.

Here, when the rubber strip G is stitched, the overlapping portions on the rear side in the stacking direction S include the step portion (G2 in FIG. 2) along the edge of the lower rubber strip G, and particularly the interlayer air. It is difficult to discharge air, and air tends to remain. On the other hand, in this embodiment, the pressing roller 21 is pressed against the rear side edge G1 of the rubber strip G, and is relatively moved along the rear side edge G1, so that the laminated rubber strip G is stitched. To do. As a result, the rubber strip G is deformed along with the pressing, and the pressing roller 21 comes into contact with the overlapping range including the rear edge G1 of the rubber strip G. Therefore, the pressing roller 21 overlaps the adjacent rubber strips G. The combined range can always be pressed. Therefore, the interlayer air can be discharged from between the overlapped rubber strips G, and the remaining of the air can be effectively suppressed, and the pressing range and the gaps between the surrounding members can be filled and reliably crimped.

Moreover, since the interlayer air moves toward the front of the stacking direction S where the rubber strip G is not stacked and can be easily discharged, and sequentially discharges, the discharge is smoothly and reliably aligned in the discharge direction. It is possible to prevent the air from being sealed in the middle between the rubber strips G. In addition, since the rear edge G1 of the rubber strip G is pressed, the vicinity thereof can be surely pressed against the lower rubber strip G, and warpage can be prevented from occurring on the laminated surface. On the other hand, the rubber strip G which is not pressed on the front side in the stacking direction S is pressed simultaneously with the pressing of the rubber strip G stacked on the non-pressed rubber strip G even when the air remains between the members. Since the air is discharged, it is crimped to the lower member without air remaining.

Furthermore, in the tire manufacturing apparatus 1, stitching and pressure bonding of the laminated rubber strip G can be performed by sequentially pressing one place in the width direction along the longitudinal direction. Therefore, the movement speed of the laminating means 40 (lamination speed of the rubber strip G) and the movement speed of the pressing roller 21 (stitching speed of the rubber strip G) coincide with each other, and both operations can be executed in the same time. , You can end them at the same time. Accordingly, even when a plurality of layers of the rubber strip G are laminated and pressure-bonded each time, the laminating means 40 can be continuously operated without waiting for the laminating means 40, and the rubber strip G can be continued regardless of the number of layers. It is also possible to prevent the cycle time required for laminating and crimping from becoming longer. In addition, since the rubber member (for example, base rubber or cap rubber) formed by laminating the rubber strip G can be sufficiently crimped to the end thereof, the above-described conventional stitching operation after formation, which has been conventionally necessary, is performed. And the cycle time can be shortened according to the time.

As described above, according to this embodiment, when molding an unvulcanized tire, the interlayer air is reliably discharged while preventing the cycle time required for laminating and crimping the rubber strip G from being increased. Residual air can be suppressed, and the quality of the tire can be improved. Further, the stitching device 20 of the tire manufacturing apparatus 1 operates independently of the stacking means 40 and the like, and can change the pressing angle of the pressing roller 21. Therefore, adjustment of the position and angle of pressing by the pressing roller 21 and setting of the timing of pressing can be performed freely without being affected by other operations when the rubber strips G are laminated. The rubber strip G can be appropriately pressed over the whole according to the state and the like. As a result, the rubber strips G can be stitched appropriately regardless of the type of rubber member formed by laminating the rubber strips G, the size and shape of the tire to be manufactured, and the interlayer air can be discharged reliably. Air entry can be effectively prevented, and the rubber strip G can be firmly pressed. In addition, since the stitching device 20 and the laminating means 40 are disposed on the opposite sides of the support 2, the pressing roller 21 during stitching can be easily confirmed visually, and the pressing state of the rubber strip G can be accurately grasped. Thus, the position and angle of the pressing roller 21 can be adjusted appropriately.

At the time of stitching, the pressing roller 21 sufficiently presses at least the overlapped area on the rear side in the stacking direction S of the rubber strip G, thereby discharging the interlayer air in the area and preventing the air from remaining. A positive effect can be ensured. Further, it is desirable that the pressing roller 21 is pressed and moved relative to the rear edge G1 in a direction perpendicular to the surface pressed by the rubber strip G. In this way, the pressing force of the pressing roller 21 can be efficiently applied to the rubber strip G at right angles so that the interlayer air can be discharged more reliably, and the rubber strip G can be prevented from shifting in the width direction. Can also be suppressed.

The stitching device 20 having one pressing roller 21 has been described above as an example, but in addition to the pressing roller 21, one or more other pressing rollers are provided, and the rubber strip is synchronized with the plurality of pressing rollers. G may be pressed. The tire manufacturing apparatus 1 is used for forming various tires before vulcanization, such as unvulcanized retreaded tires in which a rubber strip G is laminated to form a tread rubber or the like in addition to a raw tire (green tire). be able to. Therefore, the unvulcanized tire of the present invention includes various tires that are formed by laminating the rubber strip G on the molded body H in addition to the raw tire.

(Molding test of unvulcanized tire)
In order to confirm the effect of the present invention, as described above, the rubber strip G was pressed by the pressing roller 21 to form a rubber member, and an unvulcanized tire was formed (hereinafter referred to as an example). Further, the result of this example is that the pressing roller 21 and the laminating means 40 are integrally formed as in the prior art, and they are moved simultaneously to press the rubber strip G to form a rubber member. Was compared with the result of molding (hereinafter referred to as a conventional example). In the example and the conventional example, a plurality of radial ply tires for passenger cars having a tire size 225 / 45R17 defined by JATMA YEAR BOOK (2009, Japan Automobile Tire Association Standard) are manufactured, and one rubber member (here, a side wall rubber) ) And the occurrence rate of air remaining in the tire were investigated.

As a result, the average value of the cycle time was 91 in the example when compared with an index with the result of the conventional example being 100, and it was found that the cycle time could be shortened. In addition, it was found that the rate of occurrence of air residue was improved by 54% in the example with respect to the conventional example, and the residual air could be significantly suppressed. Thus, according to the present invention, when molding an unvulcanized tire, the cycle time required for laminating and crimping the rubber strip G is prevented and the interlayer air is surely discharged to suppress the remaining of the air. Prove that you can.

DESCRIPTION OF SYMBOLS 1 ... Tire manufacturing apparatus, 2 ... Support body, 10 ... Supply means, 11 ... Extruder, 12 ... Base, 20 ... Stitching device, 21 ... Pressing roller, DESCRIPTION OF SYMBOLS 30 ... Moving means, 31 ... Holder, 32 ... Pressing means, 40 ... Laminating means, G ... Rubber strip, H ... Molding object.

Claims

A rubber strip supplying means; and a laminating means for sequentially laminating the supplied rubber strip along the outer surface of the molded body, and laminating the rubber slip at least on the rear side in the laminating direction and laminating on the molded body. A tire manufacturing apparatus for molding an unvulcanized tire,
A pressing member that presses and presses the rubber strip wound around the molded body;
Moving means for pressing the pressing member against the edge on the rear side in the stacking direction of the rubber strip and relatively moving along the edge;
A tire manufacturing apparatus comprising:
In the tire manufacturing apparatus according to claim 1,
The tire manufacturing apparatus, wherein the pressing member presses at least the overlapped range on the rear side in the stacking direction of the rubber strip.
In the tire manufacturing apparatus according to claim 1 or 2,
The tire manufacturing apparatus, wherein the moving means presses the pressing member against the edge on the rear side in the stacking direction in a direction orthogonal to the surface pressed by the rubber strip.
A tire manufacturing method comprising a step of winding and laminating rubber strips in order along an outer surface of a molded body, and laminating rubber slips at least on the rear side in the laminating direction and laminating the molded body to form an unvulcanized tire Because
A step of pressing the pressing member against the edge of the rubber strip wound around the molded body in the stacking direction rear side;
A step of pressing the rubber strip in order by relatively moving the pressing member pressed against the edge on the rear side in the laminating direction and press-bonding the rubber strip; and
A tire manufacturing method comprising:
In the tire manufacturing method according to claim 4,
The tire manufacturing method characterized in that the step of pressure-bonding presses at least the overlapped range on the rear side in the stacking direction of the rubber strip with a pressing member.
In the tire manufacturing method according to claim 4 or 5,
The tire manufacturing method characterized in that the step of pressure-bonding presses the pressing member in a direction orthogonal to the pressing surface of the rubber strip against the edge on the rear side in the stacking direction.