JP2007223229A - Tire molding method and tire molding equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the uniformity of a product tire by accurately correcting irregularities, formed on the outer surface of a laminated part of a ribbon-like rubber and effectively improving the RRO of a green tire. <P>SOLUTION: An unvulcanized ribbon-like rubber sheet is laminated by being wound around the outer periphery of a molding drum 2, the lamination is stopped with predetermined timing and an outer shape of the laminated part 30 is measured by a measuring means 20. From the result of this measurement, a control unit 21 acquires the information on the position and shape of a recessed part on the outer surface of the laminated part 30. On the basis of the information, the ribbon-like rubber is formed in a cross-sectional shape corresponding to that of the recessed part, and superposed and infilled into the recessed part, so that the irregularities on the outer surface of the laminated part 30 are corrected. The lamination of the ribbon-like rubber and the correction of the irregularities are repeated so that a tire component member can be formed in a predetermined cross-sectional shape, and so that the green tire can be molded. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tire molding method and a tire molding apparatus for molding a green tire (raw tire), and in particular, RRO (Radial Run Out) of a green tire formed by laminating ribbon-shaped rubber. The present invention relates to a tire molding method and a tire molding apparatus that improve the non-uniformity (longitudinal deviation from a perfect circle).

  A pneumatic tire is generally composed of a plurality of tire constituent members such as treads and sidewalls, which are rubber members, and a green tire is formed by combining these members and vulcanized to form a predetermined shape. Conventionally, as this green tire molding apparatus, a tire molding apparatus is known in which unvulcanized ribbon-like rubber is spirally wound and laminated on the outer periphery of a molding drum to form a predetermined cross-sectional shape (Patent Literature). 1).

FIG. 4 is a side view schematically showing a schematic configuration of such a conventional tire molding apparatus 80, which is not described in the patent literature.
As shown in the figure, the tire molding apparatus 80 includes a molding drum 81 that can rotate around a cylindrical or toroidal axis, and a moving means 82 that moves the molding drum 81 in the drum axial direction (the front-rear direction in the drawing). And an extruder (not shown) for continuously extruding a ribbon-shaped rubber having a predetermined cross-sectional shape (for example, a long rubber having a thickness of about 1 mm), and rotating the molding drum 81 (see FIG. The ribbon-like rubber is wound around the outer periphery of the molding drum 81 in a spiral manner and bonded together on the outer periphery of the molding drum 81, and the rubber member 89 is bonded. Mold.

  The tire molding apparatus 80 includes a rotatable stitcher roll 83 and a stitcher unit 84 that moves the outer circumferential surface of the stitcher roll 83 along the outer circumferential surface while pressing the outer circumferential surface of the rubber member 89. Other tires wound around the ribbon-shaped rubber or between the ribbon-shaped rubber and the inner circumferential side thereof by pressing the outer surface of the ribbon-shaped rubber wound around the outer circumference of the drum 81 with the outer circumferential surface of the stitcher roll 83 that rotates. The component member is crimped. Lamination of the ribbon-like rubber is performed based on a predetermined lamination program, and one or more ribbon-like rubbers are laminated to form a tire component such as a tread, and combined with other tire components. Mold green tires.

FIG. 5 is a cross-sectional view in the tire width direction schematically showing a part of a tread of a green tire molded by the conventional tire molding apparatus 80.
As shown in the figure, the tread 50 is formed by laminating a plurality of layers of ribbon-like rubber 51 (thickness of about 1 mm in this case) and forming a predetermined cross-sectional shape on the outer peripheral surface of the green tire. Therefore, according to the tire molding apparatus 80, the tread 50 having various cross-sectional shapes can be formed by changing the lamination program and changing the lamination mode such as the number of windings and the overlap amount of the ribbon-like rubber 51. Can flexibly handle small-volume production.

  However, in this conventional tire molding apparatus 80, irregularities according to the thickness, cross-sectional shape, etc. of the ribbon-like rubber 51 may be formed on the outer surface of the tread 50. For example, at the start and end of the lamination of the ribbon-shaped rubber 51, it is necessary to wrap the ribbon-shaped rubber 51 extra in order to fill the step at the end of the ribbon-shaped rubber 51. There is a tendency that the tread 50 becomes thicker and thicker. Also, in other portions, irregularities may be formed on the outer surface, for example, when the lamination position of the ribbon-like rubber 51 is slightly shifted from a predetermined position. As a result, the cross-sectional shape and thickness of the tread 50 may become non-uniform, and the outer shape of the green tire may also become non-uniform, thereby deteriorating the RRO and the like (see FIG. Attached). When the lamination is continued while leaving such irregularities generated in the middle of the lamination, the concave portions or the convex portions are accumulated and become larger, and the RRO is further deteriorated.

  When a green tire with a large RRO is vulcanized and molded, the RRO of the tire after vulcanization also becomes large, the uniformity of the product tire decreases, causing vibration and noise during vehicle travel, etc. descend. Therefore, conventionally, a sample is extracted from the green tire after molding, and the cross-sectional shape and dimensions of the tread 50 and the like are measured and inspected, or the lamination method (program etc.) of the ribbon-like rubber 51 is changed based on the measurement result. Etc. to reduce the irregularities on the outer surface and improve the RRO characteristics of the green tire.

However, in this conventional method, since the green tire is removed from the molding drum 81 and measurement is performed, there is a problem that an accurate cross-sectional shape on the molding drum 81 cannot be grasped. That is, since the tension applied to the ribbon-like rubber 51 changes before and after removal from the molding drum 81, the expansion / contraction amount in the width direction, thickness direction, or longitudinal direction also changes, and the cross-sectional shape of the green tire (tread 50) Also changes.
Therefore, conventionally, a tire molding apparatus has been proposed in which the outer shape and thickness of a laminated portion are measured while laminating ribbon-like rubber so that the state of lamination on a molding drum can be grasped (Patent Document 2). reference).

  This conventional tire molding apparatus is equipped with a laser displacement meter or the like for measuring the displacement amount of the outer periphery of the molding drum of the tire molding apparatus, measures the displacement amount of the ribbon rubber lamination position, and from the measurement data to the end of lamination. Continuously calculate the outer shape, thickness, etc. of the laminated part, compare the calculation result with the standard value, and stop molding if there are irregularities etc. above the standard value on the surface of the laminated part The green tire is excluded.

However, this conventional apparatus simply eliminates green tires that do not meet the standards, and does not improve the RRO of individual green tires. For this reason, it is difficult to effectively improve the uniformity of the entire product tire, and there is a problem that materials and operations required until the green tire molding is stopped are wasted.
Therefore, conventionally, there has also been proposed a method for measuring the RRO of a green tire after molding and cutting the outer surface of the tread based on the measurement result to improve the RRO characteristics of each green tire (see Patent Document 3). .

  However, since this conventional method only cuts the outer surface of the tread, the concave portion cannot be filled, and the correction accuracy of the irregularities on the outer surface of the green tire and the effect of improving RRO are not sufficient, and the cut rubber material There is also a problem that is wasted.

JP 2004-216603 A JP 2004-299184 A JP-A-2005-47154

  The present invention has been made in view of the above-described conventional problems, and the object thereof is to correct the irregularities formed on the outer surface of the laminated portion of the ribbon-like rubber with high accuracy and without waste, and to improve the RRO of the green tire. It is to improve effectively and improve the uniformity and quality of product tires.

The invention of claim 1 includes a step of winding and laminating unvulcanized ribbon-like rubber around the outer periphery of a molding drum, laminating the ribbon-like rubber to form a tire component having a predetermined cross-sectional shape, A tire molding method for molding a green tire, the step of measuring the outer shape of a laminated portion in which the ribbon-shaped rubber is laminated, and the position and shape information of the concave portion on the outer surface of the laminated portion from the measurement result of the outer shape And a step of laminating and filling a ribbon-shaped rubber in the recess based on the acquired information, and filling the recess of the ribbon-shaped rubber with the irregularities on the outer surface of the laminated portion. It is characterized by correction.
According to a second aspect of the present invention, in the tire molding method according to the first aspect, the ribbon-shaped rubber is filled into the concave portion during or after the formation of the tire constituent member.
According to a third aspect of the present invention, in the tire molding method according to the first or second aspect, on the basis of the shape information of the concave portion, a ribbon-like rubber filling the concave portion is formed in a cross-sectional shape corresponding to the cross-sectional shape of the concave portion. It has the process to perform.
According to a fourth aspect of the present invention, in the tire molding method according to any one of the first to third aspects, the tire constituent member formed by laminating the ribbon-like rubber is a tread.
The invention of claim 5 comprises a molding drum, rubber supply means for supplying unvulcanized ribbon rubber to the molding drum, and laminating means for winding the ribbon rubber around the molding drum for lamination. A tire forming apparatus for forming a tire component having a predetermined cross-sectional shape by laminating the ribbon-like rubber by the laminating means, and forming a green tire, wherein the outer shape of the laminated portion where the ribbon-like rubber is laminated And measuring the position of the concave portion on the outer surface of the laminated portion and shape information from the measurement result of the measuring means, and controlling the laminating means based on the obtained information to form a ribbon shape in the concave portion And a controller for laminating and filling the rubber, and correcting irregularities on the outer surface of the laminated portion by filling the concave portions of the ribbon-like rubber.
According to a sixth aspect of the present invention, in the tire molding apparatus according to the fifth aspect, the variable means for changing the cross-sectional shape of the ribbon-shaped rubber supplied to the molding drum, and the variable means based on the shape information of the recess. And a control device that forms ribbon-shaped rubber that is controlled to fill the concave portion into a cross-sectional shape corresponding to the cross-sectional shape of the concave portion.

  According to the present invention, the unevenness formed on the outer surface of the ribbon-shaped rubber laminated portion can be corrected accurately and without waste of materials, etc., and the RRO of the green tire can be effectively improved, and the product tire Uniformity and quality can be improved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The tire molding apparatus according to the present embodiment is similar to the conventional tire molding apparatus 80 shown in FIG. 4, and forms a tire constituent member by laminating unvulcanized ribbon-like rubber on the outer periphery of a molding drum, thereby molding a green tire. The function of correcting the irregularities on the outer surface is added by laminating and filling the ribbon-like rubber in the concave portion on the outer surface of the laminated portion where the ribbon-like rubber is laminated.

FIG. 1 is a side view schematically showing a schematic configuration of the tire molding apparatus of the present embodiment.
As shown in the figure, the tire molding apparatus 1 includes a molding drum 2 that can rotate around an axis, a moving means 3 on which the molding drum 2 is placed, and a rubber supply means (not shown) for supplying ribbon-like rubber. And a stitcher unit 10 disposed on one outer peripheral side (left side in the figure) of the molding drum 2, a stitcher roll 11 provided in the stitcher unit 10 and rotatable in the circumferential direction.

  The molding drum 2 has a substantially cylindrical or toroidal outer peripheral surface corresponding to the shape of a green tire to be molded, and is rotated around an axis by a rotation driving means (not shown) made of an electric motor or the like. Winding structural members and ribbon-like rubber. The moving means 3 moves the molding drum 2 in the drum axial direction (front-rear direction in the figure), and includes an actuator such as a pneumatic or hydraulic piston / cylinder mechanism.

  The rubber supply means continuously supplies an unvulcanized ribbon-like rubber having a predetermined cross-sectional shape (for example, a long rubber having a thickness of about 1 mm) to the molding drum 2 and a cross-section of the supplied ribbon-like rubber. It has variable means for changing the shape (width, thickness, etc.). In the present embodiment, as the rubber supply means, an extruder that continuously extrudes the rubber member from the mouth opening of the extrusion head is used, and the upper and lower molds and the left and right molds of the mouth are close to each other. The variable means is configured by making the molds separable and providing each mold with an actuator or the like. That is, the molds are moved closer to and away from each other by the actuator, etc., and the opening width in the vertical and horizontal directions of the mouth opening is changed independently, and the cross-sectional shape of the ribbon-like rubber extruded from it is continuously changed. Let

  As the rubber supply means, another rubber molding device such as a calender device that rolls a rubber material between a pair of rolls to form a predetermined cross-sectional shape may be used. The cross-sectional shape of the ribbon-like rubber is changed by making the interval between the rolls adjustable. In addition, the variable means includes, for example, a rubber supply means without greatly remodeling an existing apparatus, such as providing a mold having the same configuration as the die of the above-described extruder on the rubber discharge port side of the extrusion head or the pair of rolls. It may be provided separately.

  The stitcher roll 11 has a roll shape such as a cylindrical shape or a disk shape and is rotatably supported by the stitcher unit 10. The stitcher unit 10 moves while pressing the outer peripheral surface of the stitcher roll 11 along the outer periphery of the molding drum 2, and rotates the surface of the ribbon-like rubber wound around the outer periphery of the molding drum 2 on the outer peripheral surface of the stitcher roll 11. The ribbon-shaped rubbers pressed and laminated, or the ribbon-shaped rubber and the other tire constituent members on the inner peripheral side thereof are pressure-bonded. In the present embodiment, a plurality of slit-like projections (not shown) are provided on the outer peripheral surface of the stitcher roll 11, and the ribbon-like rubber is pressed by them to increase the pressure-bonding strength between the rubbers.

  In addition, the tire molding apparatus 1 includes a measuring unit 20 that measures the outer shape and the like of a laminated portion 30 in which ribbon-like rubber is disposed on the outer peripheral side (upper side in the drawing) of the molding drum 2, and control of the entire apparatus. And a control device 21 for performing the above.

  The measuring means 20 measures the outer shape of the laminated portion 30, that is, the outer surface irregularities and the RRO of the laminated portion 30 that are generated when the ribbon-like rubber is laminated. Since this measuring means 20 is an unvulcanized rubber whose measuring object is easily deformed, it is preferable that each measurement can be performed in a non-contact manner such as a laser displacement meter. However, the measuring means 20 is not necessarily limited thereto. Each measurement can also be performed using a contact-type displacement meter or the like that presses the sensor portion against the outer surface of the portion 30 and measures the unevenness, RRO, and the like of the laminated portion 30 from the displacement.

In the present embodiment, a laser displacement meter is used as the measuring means 20, the measurement axis is arranged toward the drum axis, the outer surface of the rotating laminated unit 30 is irradiated with laser light, and the reflected light is removed from the reflected light. The distance to the surface is measured, and the outer shape of the laminated portion 30 is measured from the displacement.
That is, at the time of measurement, the lamination of the ribbon-shaped rubber is stopped at a predetermined timing, and the molding drum 2 is gradually moved in the axial direction by the moving means 3 while rotating the molding drum 2. The shape and the like are measured, and the measurement data is transmitted to the control device 21.

The control device 21 is connected to each drive unit of the tire molding device 1 such as a rubber supply unit and a variable unit that changes the cross-sectional shape of the ribbon-like rubber, in addition to being connected to the molding drum 2, the moving unit 3, and the stitcher unit 10. Then, the control signal is D / A converted and output via the D / A converter 23 and the like, and the entire tire molding apparatus 1 is controlled.
The control device 21 includes, for example, arithmetic means such as a microprocessor (MPU) that performs various data processing, analysis, arithmetic, and the like, a ROM that stores various programs, and a RAM that temporarily stores data for processing. And an external storage device (for example, a hard disk drive (HDD)) for storing various data such as measurement results of the measurement means 20, various interfaces for connection to external devices, and the like.

  Further, the control device 21 is connected to various sensors (not shown) provided in each part of the device 1 such as a rotational position detection sensor and an axial position detection sensor provided in the molding drum 2 and transmitted from them. The control information of each drive unit of the apparatus 1 is acquired while comparing the data with each target value, and based on this control information, for example, the inverter of the electric motor that rotates the molding drum 2 is controlled to rotate the molding drum 2. The position and speed are controlled, the electromagnetic valve of the actuator of the moving means 3 is controlled to open and close, the axial position of the molding drum 2 is controlled, and the rubber supply means and variable means are controlled to form a ribbon having a predetermined cross-sectional shape. Feedback control is performed for green tire molding operations such as laminating and crimping ribbon-like rubber, such as supplying rubber and changing the cross-sectional shape.

Next, a procedure for forming a tread with this tire molding apparatus 1 to mold a green tire will be described.
FIG. 2 is a flowchart showing the flow of tread formation.
The following procedures are executed by controlling the tire molding device 1 by the control device 21 based on a predetermined lamination program.

  First, an unvulcanized ribbon-like rubber having a predetermined cross-sectional shape is extruded by an extruder (rubber supply means) and supplied to the molding drum 2. At the same time, while rotating the molding drum 2 and moving it in the axial direction and pressing it with the stitching roll 11, the ribbon-like rubber is superposed on the outer periphery of the molding drum 2 and spirally wound and laminated ( S101). Next, the lamination of the ribbon-shaped rubber is stopped at a predetermined timing, for example, at a predetermined thickness and time, or when a predetermined number of turns are performed, and the outer shape of the laminated portion 30 of the ribbon-shaped rubber 30 Is measured (S102), and the A / D converter 22 performs A / D conversion on the measurement data and transmits it to the control device 21 (S103).

  The control device 21 that has received the measurement data obtains the position and shape information of the concave portion on the outer surface of the laminated portion 30 from the measurement result of the outer shape (S104), and controls each drive unit of the device 1 based on the information. Then, a ribbon-like rubber is laminated and filled in the concave portion on the outer surface of the laminated portion 30. Specifically, the control signal to the rubber supply means, the variable means for changing the cross-sectional shape of the ribbon-shaped rubber, the molding drum 2 and the like is D / A converted by the D / A converter 23 and output (S105). Based on the shape information, the ribbon-shaped rubber filling the recess is formed into a cross-sectional shape corresponding to the cross-sectional shape of the recess to be filled (for example, approximately the same thickness and width as the depth and width of the recess). And the molding drum 2 is rotated and moved in the axial direction based on the position information of the recesses (S106). The stitcher unit 10 is also controlled at the same time, and the control based on each information of these recesses is performed in conjunction with each other, and the ribbon-like rubber is stacked and filled in the recesses on the outer surface of the stacked portion 30 (S107).

FIG. 3 is a cross-sectional view in the tire width direction schematically showing a part of the outer surface portion of the laminated portion 30 laminated as described above.
As shown in the drawing, the concave portion 35 generated by the lamination of the ribbon-shaped rubber 31 is filled with a ribbon-shaped rubber 32 having a shape corresponding to the cross-sectional shape to correct the irregularities on the outer surface. In the present embodiment, the unevenness is corrected over the entire outer surface of the laminated portion 30 to smooth the outer surface. However, when the cross-sectional shape of the recess changes along the drum circumferential direction, the change is adjusted accordingly. The cross-sectional shape of the ribbon-like rubber 32 to be filled is changed continuously. The filling of the ribbon-like rubber 32 may be performed on all the recesses on the outer surface. However, from the viewpoint of the green tire molding efficiency, the degree of unevenness such as the depth and width of the recesses is defined as a predetermined reference value. In comparison, it is more preferable to carry out only for the recesses that are equal to or greater than the reference value.

  After completion of the above unevenness correction, it is determined whether or not the formation of the tread is completed (S108). If not completed (S108, NO), the process returns to S101 and the above steps are executed again. These are repeated until the formation of a tread having a predetermined cross-sectional shape is completed (S108, YES). In this way, the tread is formed by filling the concave portion on the outer surface with the ribbon-like rubber (correcting the irregularities) during the formation of the tread and when the formation is completed, and the green tire is molded in combination with other tire constituent members. Thereafter, the green tire is removed from the molding drum 2 and conveyed to a vulcanization molding apparatus in the next process by a conveyance device (not shown), and vulcanized to produce a product tire. On the other hand, the tire molding apparatus 1 automatically and continuously molds green tires by repeating the procedures shown in FIG.

  As described above, according to the present embodiment, since the ribbon-shaped rubber laminated portion 30 and the tread upon completion of formation are measured on the molding drum 2, the outer shape and the state of lamination of RRO and the like are accurately grasped. It is possible to improve the accuracy of each piece of information regarding the stacked unit 30 such as the position and shape information of the recesses on the outer surface of the stacked unit 30. In addition, since the ribbon-shaped rubber is laminated and filled into the concave portion based on such accurate information, the lamination position of the ribbon-shaped rubber can be accurately controlled, and the unevenness of the outer surface of the laminated portion 30 can be corrected accurately. Can be done well. At the same time, since the ribbon-shaped rubber filling the recess is formed in a cross-sectional shape corresponding to the cross-sectional shape of the recess, it is possible to suppress the protrusion of the rubber from the recess and to grasp the accurate cross-sectional shape of the recess as described above. The difference between the cross-sectional shape of the ribbon-like rubber formed based on the information and the cross-sectional shape of the recess to be filled can be made smaller. Therefore, it is possible to further improve the correction accuracy of the irregularities on the outer surface of the laminated portion 30.

  Also, in addition to the completion of tread formation, in order to correct the irregularities by stopping the lamination of the ribbon-like rubber at a predetermined timing during the formation, the irregularities before the concave or convex increases are increased at a small stage. Corrections can be made. Therefore, when filling a large recess, it may be necessary to laminate a plurality of ribbon-shaped rubber, but in this embodiment, the number of times the ribbon-like rubber is stacked in the recess can be reduced, and the correction time can be shortened, and Correction can be performed without waste, such as more accurate correction.

  As described above, since the irregularities on the outer surface of the laminated portion 30 can be corrected with high accuracy, the outer surface of the tread can be smoothed more, and the cross-sectional shape and thickness of the tread and the green tire can be made more uniform. Can be effectively improved. As a result, the uniformity of the product tire after vulcanization molding can be improved, and accordingly, the quality of the tire can be improved, such as the reduction of vibration and noise during vehicle travel. Furthermore, since it is possible to suppress the production of green tires and product tires with large RROs, it is possible to reduce the number of tires discarded as defective products in RRO inspections, etc., and to reduce waste and quality costs such as materials and work man-hours. Can be reduced.

  In this embodiment, the outer shape of the laminated portion 30 is measured after the formation of the tread by the lamination of the ribbon-shaped rubber is temporarily stopped, but the measurement is performed without stopping at the same time as the lamination of the ribbon-shaped rubber. In this case, the molding time of the green tire can be shortened by the time required for measurement. The unevenness correction may be performed by dividing the tread formation in any number of steps, or the tread is formed by gradually increasing the number of layers while always filling the concave portion of the layered portion 30 with ribbon-like rubber. May be.

  In the above description of the embodiment, the case where the tread of the green tire is formed with ribbon-like rubber has been described as an example. However, the tread is formed by directly laminating the ribbon-like rubber on another tire constituent member. Alternatively, after forming a tread by laminating ribbon-shaped rubber on the outer periphery of the molding drum, it may be removed from the molding drum and bonded to the outer peripheral surface of the tire constituent member on another molding drum. Therefore, the outer periphery of the molding drum on which the ribbon-shaped rubber is laminated includes the outer peripheral surface of another tire constituent member already formed on the molding drum in addition to the outer peripheral surface of the molding drum.

  Furthermore, in this embodiment, the case where a tread having a great influence on the uniformity of the tire is formed as an example of the tire constituent member is shown as an example, but the tire constituent member made of other rubber such as a sidewall is also subjected to the same method. Can be formed.

It is a side view which shows typically the schematic structure of the tire shaping | molding apparatus of this embodiment. It is a flowchart which shows the flow of tread formation by the tire shaping | molding apparatus of this embodiment. It is sectional drawing of the tire width direction which shows a part of laminated | stacking part outer surface part typically. It is a side view which shows typically schematic structure of the conventional tire shaping | molding apparatus. It is sectional drawing of the tire width direction which shows typically a part of tread of the green tire shape | molded with the conventional tire shaping | molding apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tire shaping | molding apparatus, 2 ... Molding drum, 3 ... Moving means, 10 ... Stitcher unit, 11 ... Stitcher roll, 20 ... Measuring means, 21 ... Control apparatus, 22 ... A / D converter, 23 ... D / A converter, 30 ... laminated portion, 31 ... ribbon-like rubber, 32 ... ribbon-like rubber, 35 ... concave.

Claims (6)

A tire molding process comprising a step of winding and laminating an unvulcanized ribbon-shaped rubber around the outer periphery of a molding drum, laminating the ribbon-shaped rubber to form a tire component having a predetermined cross-sectional shape, and molding a green tire A method,
Measuring the outer shape of the laminated portion in which the ribbon-like rubber is laminated;
Obtaining the position and shape information of the concave portion of the outer surface of the laminated portion from the measurement result of the outer shape; and
A step of laminating and filling a ribbon-like rubber in the recess based on the acquired information,
A tire molding method comprising correcting irregularities on an outer surface of the laminated portion by filling the concave portion of the ribbon-like rubber. In the tire molding method according to claim 1,
The tire molding method according to claim 1, wherein the filling of the ribbon-shaped rubber into the concave portion is performed during or after the formation of the tire constituent member. In the tire molding method according to claim 1 or 2,
A tire molding method comprising: forming a ribbon-like rubber filling the recess into a cross-sectional shape corresponding to the cross-sectional shape of the recess based on the shape information of the recess. In the tire molding method according to any one of claims 1 to 3,
The tire forming method, wherein the tire constituent member formed by laminating the ribbon-like rubber is a tread. Molding drums,
Rubber supply means for supplying unvulcanized ribbon rubber to the molding drum;
Laminating means for winding and laminating the ribbon-shaped rubber around the molding drum;
A tire molding device for laminating the ribbon-like rubber by the laminating means to form a tire constituent member having a predetermined cross-sectional shape, and molding a green tire,
Measuring means for measuring the outer shape of the laminated portion in which the ribbon-like rubber is laminated;
Information on the position and shape of the concave portion on the outer surface of the laminated portion is obtained from the measurement result of the measuring means, and based on the obtained information, the lamination means is controlled to laminate and fill the concave portion with ribbon-like rubber. A control device,
A tire molding apparatus for correcting irregularities on the outer surface of the laminated portion by filling the concave portion of the ribbon-like rubber. In the tire molding device according to claim 5,
Variable means for changing the cross-sectional shape of the ribbon-like rubber supplied to the molding drum;
A controller for controlling the variable means based on the shape information of the recess to form a ribbon-like rubber filling the recess into a cross-sectional shape corresponding to the cross-sectional shape of the recess;
A tire molding apparatus comprising:

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