Tire manufacturing methods

Abstract

To provide a method for manufacturing a tire that makes it possible to appropriately determine a state of an inner surface of the tire prior to installing functional components on the inner surface of the tire.SOLUTION: A method for manufacturing a tire of the present invention includes: a preparation process S1 of preparing an unvulcanized tire; a vulcanization process S2 of vulcanizing the tire in a mold; an analysis process S3 of analyzing a mold release agent component attached to an inner surface of the tire in the vulcanized tire; and a determination process S4 of determining whether or not the mold release agent component adhered to the inner surface of the tire is equal to or less than a reference value based on an analysis result by the analysis process S3.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a tire involving a vulcanization process, and more particularly, to a method for manufacturing a tire that enables appropriate determination of the state of the tire inner surface prior to installation of functional components on the tire inner surface.

Background Art

[0002] Conventionally, functional components such as sound-absorbing materials and sensors have been installed on the inner surface of tires. When installing functional components on the inner surface of a tire, it is necessary to remove the mold release agent adhering to the inner surface of the tire. The mold release agent is applied to the inner surface of the tire or the surface of the bladder in the vulcanization process to facilitate the release of the bladder from the tire, and remains on the inner surface of the tire after release. Due to the presence of such a mold release agent, the adhesion strength between the functional component and the inner surface of the tire decreases. Therefore, it has been proposed to remove the mold release agent by irradiating the inner surface of the tire with a laser (see, for example, Patent Documents 1 and 2).

[0003] However, since there is variation in the amount of the mold release agent remaining on the inner surface of the tire, at present, simply irradiating the inner surface of the tire with a laser cannot always appropriately remove the mold release agent.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a method for manufacturing a tire that enables appropriate determination of the state of the tire inner surface prior to installation of functional components on the tire inner surface. [Means for solving the problem]

[0006] The present invention provides a method for manufacturing a tire to achieve the above objective, comprising: a preparation step of preparing an unvulcanized tire; a vulcanization step of vulcanizing the tire in a mold; an analysis step of analyzing the release agent components adhering to the inner surface of the vulcanized tire; and a determination step of determining whether the release agent components adhering to the inner surface of the tire are below a standard value based on the analysis results from the analysis step. The process includes a mold release agent removal step, in which the mold release agent component adhering to the inner surface of the tire is removed. If the determination step determines that the amount of mold release agent component adhering to the inner surface of the tire exceeds a standard value, the mold release agent removal step is performed. If the determination step determines that the amount of mold release agent component adhering to the inner surface of the tire is below the standard value, the mold release agent removal step is omitted. It is characterized by the following: [Effects of the Invention]

[0007] The inventors of the present invention discovered, through analysis of the inner surface of tires after the vulcanization process, that the amount of mold release agent components remaining on the inner surface of the tire varies greatly depending on the number of vulcanization cycles.

[0008] In other words, the present invention provides a method for manufacturing a tire comprising a preparation step of preparing an unvulcanized tire and a vulcanization step of vulcanizing the tire in a mold. By performing an analysis step of analyzing the release agent components adhering to the inner surface of the tire and a determination step of determining whether the amount of release agent components adhering to the inner surface of the tire is below a standard value based on the analysis results, it becomes possible to appropriately determine the condition of the inner surface of the tire using the amount of release agent components that affect the adhesion of functional components as a criterion, prior to the installation of functional components on the inner surface of the tire. As a result, even if there is variation in the amount of release agent components remaining on the inner surface of the tire, it becomes possible to appropriately remove those release agent components. For example, if there is a large amount of release agent components adhering to the inner surface of the tire, it becomes possible to reliably remove the release agent components using a method appropriate to that amount, while on the other hand, if there is a small amount of release agent components adhering to the inner surface of the tire, it becomes possible to reduce energy consumption by omitting the removal of the release agent components.

[0009] In the analysis process, it is preferable to analyze the release agent components adhering to the inner surface of the tire at the location where the functional component is attached. This allows for an appropriate determination of the condition of the inner surface of the tire at the location where the functional component is attached. In the analysis process, the release agent components adhering to the inner surface of the tire may be analyzed based on information obtained directly from the inner surface of the tire, or they may be analyzed based on information obtained indirectly from the inner surface of the tire.

[0010] The tire manufacturing method of the present invention, in addition to the above-described steps, includes a mold release agent component removal step for removing mold release agent components adhering to the inner surface of the tire. Preferably, the mold release agent component removal step is performed when the determination step determines that the amount of mold release agent components adhering to the inner surface of the tire exceeds a standard value. This allows the mold release agent components to be removed if they exceed a standard value on the inner surface of the tire, and the mold release agent component removal step to be omitted otherwise.

[0011] Furthermore, it is preferable to repeat the analysis process, the judgment process, and the mold release agent component removal process until the amount of mold release agent component adhering to the inner surface of the tire falls below the standard value. This ensures that the amount of mold release agent component adhering to the inner surface of the tire falls below the standard value, thereby reliably improving the adhesion of functional components to the inner surface of the tire.

[0012] In the mold release agent component removal process, it is preferable to adjust the removal intensity according to the amount of mold release agent component adhering to the inner surface of the tire. This allows for efficient removal of the mold release agent component adhering to the inner surface of the tire, thereby reducing energy consumption.

[0013] In the mold release agent component removal process, it is preferable to remove the mold release agent component adhering to the inner surface of the tire by laser irradiation. This allows for efficient removal of the mold release agent component adhering to the inner surface of the tire.

[0014] In the analysis process, it is preferable to analyze the mold release agent component adhering to the inner surface of the tire using a fluorescent X-ray analyzer. Thereby, the analysis of the mold release agent component adhering to the inner surface of the tire can be easily performed.

[0015] In addition to the above-described respective processes, the method for manufacturing a tire of the present invention has an installation process of installing functional components on the inner surface of the tire, and when it is determined in the determination process that the mold release agent component adhering to the inner surface of the tire is below the reference value, it is preferable to perform the installation process. Thereby, the adhesiveness of the functional component to the inner surface of the tire can be surely enhanced.

Brief Description of the Drawings

[0016] [Figure 1] It is a flowchart showing a method for manufacturing a tire according to an embodiment of the present invention. [Figure 2] It is a flowchart showing a method for manufacturing a tire according to another embodiment of the present invention. [Figure 3] It is a flowchart showing a method for manufacturing a tire according to another embodiment of the present invention. [Figure 4] It is a side view showing an example of an inner surface analyzer used in the method for manufacturing a tire of the present invention. [Figure 5] It is a side view showing an example of a mold release agent component removing device used in the method for manufacturing a tire of the present invention. [Figure 6] It is a meridian cross-sectional view showing a tire in which functional components are installed on the inner surface of the tire by the method for manufacturing a tire of the present invention.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings. It is a flowchart showing a method for manufacturing a tire according to an embodiment of the present invention.

[0018] As shown in FIG. 1, the method for manufacturing a tire according to this embodiment includes a preparation step S1 of preparing an unvulcanized tire, a vulcanization step S2 of vulcanizing the tire in a mold, an analysis step S3 of analyzing the mold release agent components adhering to the inner surface of the vulcanized tire, a determination step S4 of determining whether or not the mold release agent components adhering to the inner surface of the tire are below a reference value based on the analysis result of the analysis step S3, and an installation step S5 of installing functional components on the inner surface of the tire.

[0019] In the preparation step S1, tire constituent members such as carcass members, belt members, bead cores, bead fillers, tread rubber members, sidewall rubber members, and rim cushion rubber members are assembled to form an unvulcanized tire. Next, in the vulcanization step S2, the unvulcanized tire is put into a mold, and the tire is heated and vulcanized with the bladder inflated inside the tire. Here, in order to facilitate the separation of the bladder and the tire after vulcanization, a mold release agent is applied to the inner surface of the tire in the preparation step S1, a mold release agent is applied to the surface of the bladder used in the vulcanization step S2, or a film containing a mold release agent is formed in advance on the surface of the bladder used in the vulcanization step S2. In the case of application, spraying can be used. In the case of a film, baking can be performed after applying the mold release agent, or coating with a resin having mold release properties can be performed. The form is not particularly limited.

[0020] In the analysis step S3, the mold release agent components adhering to the inner surface of the tire are analyzed. The mold release agent components include resin components such as silicone resin, fluororesin, and polyethylene resin, lubricant components such as fatty acid metal salts, fatty acid amides, and fatty acid esters, and filler components such as talc and mica, and may further contain other components. When analyzing the mold release agent components, the mold release agent components that affect the adhesiveness of the functional components are specified, and analysis can be performed on the specified mold release agent components.

[0021] In the determination step S4, it is determined whether the amount of mold release agent adhering to the inner surface of the tire is below the standard value based on the analysis results from the analysis step S3. If it is determined in the determination step S4 that the amount of mold release agent adhering to the inner surface of the tire is below the standard value, the condition of the inner surface of the tire is good, and the adhesion of the functional component to the inner surface of the tire is good, so the tire is submitted to the functional component installation step S5. If the amount of mold release agent exceeds the standard value, it is possible to remove the mold release agent adhering to the inner surface of the tire, but it is also possible to ship the tire as is without the functional component installed.

[0022] In installation step S5, functional components are installed on the inner surface of the tire. These functional components include sound-absorbing materials, sealant layers, and electronic communication modules. Such functional components are attached to the inner surface of the tire using adhesives, tacks, double-sided adhesive tape, etc.

[0023] According to the tire manufacturing method described above, in a tire manufacturing method having a molding step S1 for preparing an unvulcanized tire and a vulcanization step S2 for vulcanizing the tire in a mold, an analysis step S3 for analyzing the release agent components attached to the inner surface of the tire, and a determination step for determining whether the release agent components attached to the inner surface of the tire are below a standard value based on the analysis results from the analysis step S3 are performed, thereby allowing for appropriate determination of the condition of the inner surface of the tire using the amount of release agent components that affect the adhesion of functional components as a criterion, prior to the installation of functional components on the inner surface of the tire. As a result, even if there is variation in the amount of release agent components remaining on the inner surface of the tire, it becomes possible to appropriately remove those release agent components. For example, if there is a large amount of release agent components attached to the inner surface of the tire, it becomes possible to reliably remove the release agent components using a method appropriate to that amount, while on the other hand, if there is a small amount of release agent components attached to the inner surface of the tire, it becomes possible to reduce energy consumption by omitting the removal of the release agent components.

[0024] In analysis step S3, it is advisable to analyze the release agent components adhering to the inner surface of the tire at the location where the functional component is attached. This allows for an appropriate determination of the condition of the inner surface of the tire at the location where the functional component is attached. For example, if the functional component is a sound-absorbing material or a sealant layer, these functional components are attached along the circumferential direction of the tire to the area corresponding to the tread on the inner surface of the tire. In this case, it is sufficient to analyze the components of the inner surface of the tire at at least one location in the strip-shaped attachment area where such functional components are attached. Similarly, if the functional component is an electronic communication module, it is attached to any localized area on the inner surface of the tire. In this case, it is sufficient to analyze the components of the inner surface of the tire at at least one location in the localized area where such functional components are attached.

[0025] Figure 2 is a flowchart showing a tire manufacturing method according to another embodiment of the present invention. As shown in Figure 2, the tire manufacturing method according to this embodiment includes a preparation step S1 for preparing an unvulcanized tire, a vulcanization step S2 for vulcanizing the tire in a mold, an analysis step S3 for analyzing the release agent components adhering to the inner surface of the vulcanized tire, a determination step S4 for determining the state of the inner surface of the tire based on the analysis results from analysis step S3, an installation step S5 for installing functional components on the inner surface of the tire, and a release agent component removal step S6 for removing the release agent components adhering to the inner surface of the tire. Steps S1 to S5 are the same as in the embodiment shown in Figure 1, so a detailed explanation of that part is omitted.

[0026] The tire manufacturing method according to this embodiment includes, in addition to steps S1 to S5, a mold release agent component removal step S6 for removing mold release agent components adhering to the inner surface of the tire. If the determination step S4 determines that the amount of mold release agent components adhering to the inner surface of the tire exceeds a standard value, the mold release agent component removal step S6 is performed, and thereafter, the functional component installation step S5 is performed. In this case, if there are mold release agent components on the inner surface of the tire that exceed a standard value, the mold release agent components are removed before the functional component installation step S5 is performed; otherwise, the mold release agent component removal step S6 can be omitted.

[0027] Figure 3 is a flowchart showing a tire manufacturing method according to yet another embodiment of the present invention. As shown in Figure 3, the tire manufacturing method according to this embodiment includes a preparation step S1 for preparing an unvulcanized tire, a vulcanization step S2 for vulcanizing the tire in a mold, an analysis step S3 for analyzing the release agent components adhering to the inner surface of the vulcanized tire, a determination step S4 for determining whether the release agent components adhering to the inner surface of the tire are below a standard value based on the analysis results from analysis step S3, an installation step S5 for installing functional components on the inner surface of the tire, and a release agent component removal step S6 for removing the release agent components adhering to the inner surface of the tire. Steps S1 to S5 are the same as in the embodiment of Figure 1, and step S6 is the same as in the embodiment of Figure 2, so a detailed explanation of those parts will be omitted.

[0028] In the tire manufacturing method according to this embodiment, the analysis step S3, the determination step S4, and the mold release agent component removal step S6 are repeated until the amount of mold release agent component adhering to the inner surface of the tire falls below a standard value. That is, after performing the mold release agent component removal step S6, the mold release agent component adhering to the inner surface of the tire is analyzed again in the analysis step S3, and the condition of the inner surface of the tire is determined again in the determination step S4. In this case, when performing the functional component installation step S5, the amount of mold release agent component adhering to the inner surface of the tire is below a standard value, so the adhesion of the functional component to the inner surface of the tire can be reliably improved.

[0029] In the mold release agent component removal step S6, it is preferable to adjust the removal intensity according to the amount of mold release agent component adhering to the inner surface of the tire. For example, if the initial removal intensity of the mold release agent component removal step S6 is set to the minimum removal intensity, and the removal intensity is increased in proportion to the amount of mold release agent component detected, the mold release agent component adhering to the inner surface of the tire can be removed efficiently, and energy consumption can be suppressed.

[0030] Figure 4 shows an example of an internal surface analysis device used in the tire manufacturing method of the present invention. In Figure 4, multiple hangers 11 grip the bead portion of the tire 1 from above. The tire 1 rotates around its central axis by the drive of these hangers 11. Meanwhile, an internal surface analysis device 13 is mounted on a support 12 that extends vertically from the bottom of the tire 1. The internal surface analysis device 13 is a device that analyzes release agent components adhering to the inner surface of the tire 1 without contact. With such an internal surface analysis device 13, it is possible to analyze the release agent components adhering to the inner surface of the tire 1 based on information obtained directly from the inner surface of the tire. Furthermore, when the tire 1 is stationary, it is possible to perform analysis on a localized area of ​​the inner surface of the tire 1, and by rotating the tire 1, it is possible to perform analysis on a wide area of ​​the inner surface of the tire. Alternatively, instead of rotating the tire 1, the internal surface analysis device 13 may be configured to rotate around the central axis of the tire 1.

[0031] As the internal surface analysis device 13, analytical devices such as X-ray fluorescence analyzers (XRF analyzers) and infrared spectrometers (IR analyzers) can be used, but it is particularly preferable to use an X-ray fluorescence analyzer. With an X-ray fluorescence analyzer, X-rays are irradiated onto the inner surface of the tire from the X-ray fluorescence analyzer, the resulting characteristic X-rays (fluorescent X-rays) are detected, and quantitative analysis of substances present on the inner surface of the tire is performed based on the detected fluorescent X-rays. This makes it easy to analyze the release agent components adhering to the inner surface of the tire. Note that a handheld type internal surface analysis device 13 may also be used. Furthermore, the analysis of release agent components adhering to the inner surface of the tire can be performed not only directly using the internal surface analysis device 13, but also, for example, by wiping off the adhering material from the inner surface of the tire using tissue or cloth and performing the analysis based on the wiped-off material. In other words, the release agent components adhering to the inner surface of the tire can be analyzed based on information obtained indirectly from the inner surface of the tire.

[0032] Figure 5 shows an example of a mold release agent component removal device used in the tire manufacturing method of the present invention. In Figure 5, multiple hangers 11 grip the bead portion of the tire 1 from above. The tire 1 rotates around its central axis by the drive of these hangers 11. Meanwhile, a mold release agent component removal device 14 is mounted on a support 12 that extends vertically from the bottom of the tire 1. The mold release agent component removal device 14 is a device that removes mold release agent components adhering to the inner surface of the tire 1. With such a mold release agent component removal device 14, it is possible to remove mold release agent components adhering to the inner surface of the tire. Furthermore, when the tire 1 is stationary, it is possible to remove mold release agent components from a localized area on the inner surface of the tire 1, and by rotating the tire 1, it is possible to remove mold release agent components from a wide area on the inner surface of the tire 1. Alternatively, instead of rotating the tire 1, the mold release agent component removal device 14 may be configured to rotate around the central axis of the tire 1. Furthermore, the support 12 may be equipped with both an internal surface analysis device 13 and a mold release agent component removal device 14 simultaneously.

[0033] As the mold release agent component removal device 14, a removal device such as a device that removes mold release agent components by laser irradiation or a device that removes mold release agent components by plasma irradiation can be used, but it is particularly preferable to use a device that removes mold release agent components by laser irradiation. With a device that removes mold release agent components by laser irradiation, mold release agent components adhering to the inner surface of the tire 1 can be removed efficiently. In addition to removing mold release agent components with the mold release agent component removal device 14, it is also possible to wipe off the adhering material from the inner surface of the tire 1 using tissue or cloth, or to wash the inner surface of the tire 1 with a cleaning solution.

[0034] Figure 6 shows a tire in which a functional component is installed on the inner surface of the tire by the tire manufacturing method of the present invention. In Figure 6, the functional component 3 is attached to the inner surface of the tire 1 via an adhesive layer 2. At the attachment position of the functional component 3 on the inner surface of the tire 1, the release agent component adhering to the inner surface of the tire 1 is analyzed, and if necessary, the release agent component adhering to the inner surface of the tire 1 is removed, and it is confirmed that the remaining release agent component is below the standard value. Therefore, the adhesion of the functional component 3 to the inner surface of the tire 1 is good. [Examples]

[0035] In a tire manufacturing method comprising a preparation step for preparing an unvulcanized tire and a vulcanization step for vulcanizing the tire in a mold, and using a bladder with a silicone resin coating formed on its surface in the vulcanization step, when continuously producing 5,000 passenger car tires, the amount of mold release agent adhering to the inner surface of 50 tires each was optimized using the conventional method and the method of Example 1.

[0036] In conventional methods, the mold release agent components on the inner surface of all tires were removed by laser irradiation. In Example 1, the mold release agent components adhering to the inner surface of the tires were analyzed using an X-ray fluorescence analyzer. If it was determined that the amount of mold release agent components (Si content) adhering to the inner surface of the tires exceeded the standard value (2% by weight), the mold release agent components on the inner surface of the tires were removed by laser irradiation. However, if the amount of mold release agent components adhering to the inner surface of the tires was below the standard value, the removal of the mold release agent components was omitted.

[0037] The power consumption of the laser irradiation device was determined for both the conventional example and Example 1, and the results are shown in Table 1. The evaluation results are shown as an index with the conventional example set to 100. A larger index value indicates higher power consumption.

[0038] [Table 1]

[0039] As can be seen from Table 1, in the method of Example 1, the release agent component is removed only when the amount of release agent component adhering to the inner surface of the tire exceeds the standard value, so energy consumption was reduced compared to the conventional method.

[0040] Next, in a tire manufacturing method comprising a preparation step for preparing an unvulcanized tire and a vulcanization step for vulcanizing the tire in a mold, and using a bladder with a silicone resin coating formed on its surface in the vulcanization step, when continuously producing 5,000 passenger car tires, the amount of mold release agent adhering to the inner surface of 50 tires each was adjusted using the methods of the conventional example and Example 2.

[0041] In the conventional example, the mold release agent components on the inner surface of all tires were removed by laser irradiation. In Example 2, the mold release agent components adhering to the inner surface of the tires were analyzed using an X-ray fluorescence analyzer. If it was determined that the amount of mold release agent components (Si content) adhering to the inner surface of the tires exceeded the standard value (2% by weight), the mold release agent components on the inner surface of the tires were removed by laser irradiation. The analysis process, determination process, and mold release agent component removal process were repeated until the amount of mold release agent components adhering to the inner surface of the tires was below the standard value.

[0042] For both the Conventional Example and Example 2, the amount of Si on the inner surface of the tire used in the functional component installation process was measured, and the average Si amount and CV value were determined. The results are shown in Table 2. The evaluation results are shown as an index with the Conventional Example set to 100. A larger index value indicates a larger average Si amount and CV value. In addition, for both the Conventional Example and Example 2, the functional component was installed on the inner surface of the tire using adhesive, and the adhesive strength of the functional component to the inner surface of the tire (the maximum stress generated when a shear force is applied between the inner surface of the tire and the functional component) was measured. The percentage of cases where the adhesive strength satisfied the specified value (adhesion pass rate) was determined, and the results are also shown in Table 2.

[0043] [Table 2]

[0044] As can be seen from Table 2, in the method of Example 2, the average value of Si content and CV value on the inner surface of the tire subjected to the functional component installation process were smaller compared to the conventional example, and as a result, the acceptance rate of the adhesive was higher.

[0045] Next, in a tire manufacturing method comprising a preparation step for preparing an unvulcanized tire and a vulcanization step for vulcanizing the tire in a mold, and using a bladder with a silicone resin coating formed on its surface in the vulcanization step, when continuously producing 5,000 passenger car tires, the amount of mold release agent adhering to the inner surface of 50 tires each was adjusted using the methods of the conventional example and Example 3.

[0046] In conventional examples, the mold release agent components on the inner surface of all tires were removed by laser irradiation. In Example 3, the mold release agent components adhering to the inner surface of the tires were analyzed using an X-ray fluorescence analyzer. The mold release agent components (Si content) adhering to the inner surface of the tires were classified into three stages: if they were below the standard value (2% by weight), if they were 5 times or less the standard value, and if they were more than 5 times the standard value. If it was determined that the mold release agent components were below the standard value, the mold release agent components were not removed. If it was determined that the mold release agent components exceeded the standard value, the mold release agent components on the inner surface of the tires were removed by laser irradiation. The laser irradiation intensity when the mold release agent components were more than 5 times the standard value was set higher than the laser irradiation intensity when the mold release agent components were 5 times or less the standard value.

[0047] For both the Conventional Example and Example 3, the amount of Si on the inner surface of the tire used in the functional component installation process was measured, and the average Si amount and CV value were determined. The results are shown in Table 3. The evaluation results are shown as an index with the Conventional Example set to 100. A larger index value indicates a larger average Si amount and CV value. Furthermore, for both the Conventional Example and Example 3, the functional component was installed on the inner surface of the tire using adhesive, and the adhesive strength of the functional component to the inner surface of the tire (the maximum stress generated when a shear force is applied between the inner surface of the tire and the functional component) was measured. The percentage of cases where the adhesive strength satisfied the specified value (adhesion pass rate) was determined, and the results are also shown in Table 3. In addition, the power consumption of the laser irradiation device was determined for both the Conventional Example and Example 3, and the results are also shown in Table 3. The power consumption evaluation results are shown as an index with the Conventional Example set to 100. A larger index value indicates a larger power consumption.

[0048] [Table 3]

[0049] As can be seen from Table 3, in the method of Example 3, the average value of Si content and CV value on the inner surface of the tire used in the functional component installation process were smaller compared to the conventional method, resulting in a higher pass rate for adhesion. Furthermore, in the method of Example 3, the removal strength was adjusted according to the amount of release agent component adhering to the inner surface of the tire, so energy consumption was reduced compared to the conventional method. [Explanation of Symbols]

[0050] 1 tire 2 Adhesive layer 3 Functional parts 11 hangers 12 Support 13 Internal surface analysis device 14. Release agent component removal device

Claims

1. A method for manufacturing a tire, comprising: a preparation step of preparing an unvulcanized tire; a vulcanization step of vulcanizing the tire in a mold; an analysis step of analyzing the release agent components adhering to the inner surface of the vulcanized tire; a determination step of determining whether the release agent components adhering to the inner surface of the tire are below a standard value based on the analysis results of the analysis step; and a release agent component removal step of removing the release agent components adhering to the inner surface of the tire, wherein the release agent component removal step is performed if the determination step determines that the release agent components adhering to the inner surface of the tire exceed a standard value, and the release agent component removal step is omitted if the determination step determines that the release agent components adhering to the inner surface of the tire are below a standard value.

2. The method for manufacturing a tire according to claim 1, characterized in that, in the analysis step, release agent components attached to the inner surface of the tire at the position where the functional component is attached to the inner surface of the tire are analyzed.

3. The method for manufacturing a tire according to claim 1 or 2, characterized in that, in the analysis step, the release agent components adhering to the inner surface of the tire are analyzed based on information obtained directly from the inner surface of the tire.

4. The method for manufacturing a tire according to claim 1 or 2, characterized in that, in the analysis step, the release agent components adhering to the inner surface of the tire are analyzed based on information indirectly obtained from the inner surface of the tire.

5. A method for manufacturing a tire according to any one of claims 1 to 4, characterized in that the analysis step, the determination step, and the mold release component removal step are repeated until the amount of mold release agent component adhering to the inner surface of the tire falls below a standard value.

6. A method for manufacturing a tire according to any one of claims 1 to 5, characterized in that, in the mold release agent component removal step, the removal strength is adjusted according to the amount of mold release agent component adhering to the inner surface of the tire.

7. The method for manufacturing a tire according to any one of claims 1 to 6, characterized in that, in the mold release agent component removal step, the mold release agent component adhering to the inner surface of the tire is removed by laser irradiation.

8. The method for manufacturing a tire according to any one of claims 1 to 7, characterized in that, in the analysis step, the release agent components adhering to the inner surface of the tire are analyzed using an X-ray fluorescence analyzer.

9. A method for manufacturing a tire according to any one of claims 1 to 8, comprising an installation step of installing a functional component on the inner surface of the tire, wherein the installation step is performed when it is determined in the determination step that the release agent component adhering to the inner surface of the tire is below a standard value.

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