JP2010042534A - Tire inner face treating method and tire inner surface treating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire inner face treating method capable of polishing properly a tire inner face, and a tire inner face treating device capable of executing the treating method. <P>SOLUTION: The tire inner face treating method polishes the tire inner face 4 by a polishing tool 5. The method polishes the tire inner face 4, by controlling a pressing force onto the tire inner face 4 of the polishing tool 5. This tire inner face treating device 1 can executes the treating method. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tire inner surface processing method for polishing a tire inner surface via a polishing tool, and a tire inner surface processing apparatus for carrying out such a processing method.

  In general, in a pneumatic tire assembled on a rim and attached to a vehicle, the tread portion oscillates against the road surface unevenness while the vehicle is running, and the air filled in the tire cavity resonates. This cavity resonance is a main cause of so-called road noise, and many of the resonance frequencies exist in the range of 180 to 300 Hz. When the road noise is transmitted to the vehicle interior, unlike the noise in other frequency bands, the road noise is sharp and has a high peak value, which is annoying noise for passengers in the vehicle interior.

In order to suppress such cavity resonance and reduce road noise, Patent Document 1 proposes a pneumatic tire in which an annular sound absorbing layer for noise suppression composed of a nonwoven fabric is fixed on the tire inner surface in the tire circumferential direction. ing. Patent Document 2 proposes a tire in which a sound absorbing layer made of a sponge material is fixed to the tire inner surface.
Japanese Patent No. 3622957 JP 2003-48407 A

  In general, the inner surface of a tire after vulcanization remains in a state in which a release material such as silicone oil is applied to ensure releasability from a vulcanization bladder used during vulcanization molding. Yes. The reason why the sound absorbing layer cannot be firmly attached even if the sound absorbing layer is attached to the tire inner surface with the release agent applied, even if the sound absorbing layer is attached using the adhesive, because the adhesive property of the adhesive is impaired by the release agent. It becomes.

In order to solve the above problem, Patent Document 3 discloses that the inner surface of the tire is polished by the polishing tool of the tire inner surface processing apparatus, the release agent is peeled off, and the adhesion between the tire inner surface and the sound absorbing layer is improved. Is described.
JP 2007-168242 A

  However, in the tire inner surface processing apparatus described in Patent Document 3, the depth to which the tire inner surface is polished is controlled by the position of the polishing tool (position in the height direction) with respect to the tire inner surface. Depending on the shape and shape, the position of the polishing tool must be finely controlled, and this control is difficult, so the inner surface of the tire is polished more than necessary, and the rigidity and air tightness of the tire is impaired. On the contrary, the tire inner surface is not sufficiently polished, and the sound absorbing layer may not be effectively attached.

  Accordingly, an object of the present invention is to provide a tire inner surface treatment method that makes it possible to polish the tire inner surface appropriately. Moreover, the further objective of this invention is to provide the tire inner surface processing apparatus which can implement this processing method.

  In order to achieve the above object, the first invention is a tire inner surface treatment method for polishing an inner surface of a tire via a polishing tool, wherein the polishing is performed by controlling the pressing force of the polishing tool against the tire inner surface. It is the tire inner surface processing method to do.

  In the first invention, the pressing force of the polishing tool against the tire inner surface is preferably constant.

Furthermore, in the first invention, the pressing force of the polishing tool against the tire inner surface is preferably in the range of 0.8 to 2.0 N / mm ² .

  The second invention relates to a tire inner surface processing apparatus for polishing a tire inner surface, wherein the apparatus holds a tire holding tool for holding the tire, a polishing tool for moving and polishing the tire inner surface, and a pressure for pressing the tire inner surface by the polishing tool. And a pressure control facility for controlling the tire inner surface treatment apparatus.

  In the second invention, the polishing tool is preferably a roller brush or a sheet brush.

  Furthermore, in the third invention, it is preferable that at least a portion of the polishing tool that presses the tire inner surface is a nonwoven fabric.

  Furthermore, it is preferable that the nonwoven fabric contains an abrasive.

  According to the present invention, it is possible to provide a tire inner surface processing method capable of appropriately polishing the tire inner surface by controlling the pressure of the polishing tool. Moreover, it is possible to provide a tire inner surface processing apparatus that can carry out such a processing method.

  Next, embodiments of the present invention will be described with reference to the drawings. Fig.1 (a) is a front view of the tire inner surface processing apparatus according to this invention, and FIG.1 (b) is the side view. FIG. 2A is a perspective view of the polishing tool of the tire inner surface processing apparatus shown in FIG. 1, and FIG. 2B is a perspective view of the polishing tool of another tire inner surface processing apparatus according to the present invention. FIG. 3 (a) is a front view of another tire inner surface treatment apparatus according to the present invention, and FIG. 3 (b) is a side view thereof.

  As shown in FIGS. 1A and 1B, a tire inner surface processing apparatus 1 according to the present invention includes a tire holder 3 including a roller for holding a tire 2 in an upright posture, and a tire inner surface 4. A polishing tool 5 for polishing and a pressure control facility 6 for controlling the pressure with which the polishing tool 5 presses the inner surface 4 of the tire are provided. Show). The tire holder 3 includes a side support 7 that supports the tire 2 from the side surface of the tire 2, and a lower support 8 that supports the tire 2 from below the tire 2. The side support 7 is provided at four places on the left and right sides of the tire 2, for a total of eight places, and the tire 2 is sandwiched between them to support the tire 2 from the left and right directions. Further, the lower holding tool 8 is provided at two locations below the tire, and supports the tire 2 from below the tire 2. Note that the tire holder 3 includes all rollers, and the tire 2 can be rotated at a desired speed and number of rotations as necessary using such rollers. Moreover, after holding the tire 2 in the tire inner surface treatment apparatus, an abrasive tool is inserted from the rim hole. As shown in FIG. 2 (a), the polishing tool 5 is a roller-like brush that can rotate in the tire circumferential direction, and the portion that polishes the inner surface of the tire is a polyethylene containing alumina oxide, silicon carbide or the like as an abrasive. It is comprised with the nonwoven fabric which consists of terephthalate (PET). Examples of the non-woven fabric include, in addition to PET, organic fibers such as rayon or aramid, inorganic fibers such as glass or carbon, fibers derived from animals, fibers derived from plants, and the like that are entangled and integrated. The roller inner brush 4 comes into contact with the tire inner surface 4, presses the tire inner surface 4 with a predetermined pressure, and rotates the tire 2 in this state, whereby the tire inner surface 4 is polished. As equipment for adjusting the pressure for pressing the tire inner surface 4 to a predetermined value, a pressure control equipment 6 including a pressure measuring device 9, a pressure evaluation device 10 and a pressure load device 11 is used. In such equipment, first, the pressure measuring device 9 disposed below the tire 2 measures the pressure applied to the tire inner surface 4 by the polishing tool 5. Next, pressure information measured by the pressure measuring device 9 is sent to the pressure evaluating device 10 (arrow A), and the pressure evaluating device 10 evaluates whether or not the measured pressure is an appropriate value. Then, according to the evaluation result, an adjustment signal is sent from the pressure evaluation device 10 to the pressure load device 11 including the hydraulic cylinder (arrow B), and the hydraulic cylinder expands and contracts by the signal, and the polishing tool 5 Thus, the pressure applied to the tire inner surface 4 is adjusted. That is, it is possible to polish using the pressure control equipment 6 while always adjusting the pressure applied to the tire inner surface 4 from the polishing tool 5.

According to this, the pressure applied to the tire inner surface from the polishing tool 5 is set to an appropriate value corresponding to the shape of the tire and the state of the inner surface, and the tire inner surface 4 is pressed with a constant pressure by the polishing tool 5. By polishing the tire inner surface 4, even if the tire inner surface 4 has irregularities due to joints or ribs of tire constituent members such as an inner liner, the amount of polishing of the tire inner surface 4 can be made uniform and appropriate. Become. Therefore, the inner surface of the tire is not polished more than necessary, and on the contrary, the inner surface of the tire is not sufficiently polished, and the sound absorbing layer can be easily attached. Examples of the sound absorbing layer include non-woven fabrics and sponge materials, and examples of the adhesive used for attaching to the tire inner surface 4 include a styrene-butadiene rubber latex adhesive and an aqueous polymer-isocyanate system. And the like.
Further, the pressure measuring device 9 of the pressure control facility 6 can be provided at an arbitrary position as long as the pressure applied to the tire inner surface can be measured. For example, as shown in FIG. It can also be provided between the apparatus 11. Moreover, in the tire inner surface processing apparatus 1 described above, the polishing tool 5 is a roller brush, but may have other configurations as long as the tire inner surface 4 can be polished, for example, as shown in FIG. Thus, it is also possible to provide a sheet-like brush having a block-like non-woven fabric divided into ten pieces.

Moreover, it is preferable to press the polishing tool 5 against the tire inner surface 4 with a pressure in the range of 0.8 to 2.0 N / mm ² . This is because when the polishing tool 5 is pressed against the tire inner surface 4 at a pressure exceeding 2.0 N / mm ² , the tire inner surface 4 is pressed too much, so that the tire inner surface is excessively polished. This is because rigidity and airtightness may be reduced. On the other hand, when the polishing tool 5 is pressed against the tire inner surface 4 at a pressure of less than 0.8 N / mm ² , the pressure that presses the tire inner surface 4 is insufficient, and the tire inner surface 4 is not sufficiently polished. This is because the adhesion of the sound absorbing layer to the tire inner surface 4 is lowered, and the attached sound absorbing layer may be easily peeled off from the tire inner surface.

  Note that the above description shows only a part of the embodiment of the present invention, and these configurations can be combined with each other or various modifications can be made without departing from the gist of the present invention. . For example, in the illustrated example, the inner surface of the tread portion of the tire inner surface 4 is subjected to polishing treatment, but the position where the sound absorbing layer is applied is not limited to this. Of these, it is possible to polish the shoulder portion, the bead portion, and the like. In the illustrated example, the polishing tool 5 is moved in the tire circumferential direction to polish the tire inner surface 4, but the tire inner surface 4 can also be polished by moving it in any other direction. Furthermore, in the illustrated example, the tire inner surface is polished by rotating the tire 2 while the tire inner surface 4 is pressed by the polishing tool 5. On the contrary, the abrasive tool 5 is fixed with the tire fixed. It is also possible to polish the tire inner surface 4 by moving it.

  As is apparent from the above description, according to the present invention, it is possible to provide a tire inner surface treatment method capable of appropriately polishing the tire inner surface. It has also become possible to provide a tire inner surface treatment apparatus that can carry out such a treatment method.

(A) is the front view of the tire inner surface processing apparatus according to this invention, (b) is the side view. (A) is a perspective view of the polishing tool of the tire inner surface processing apparatus shown in FIG. 1, and (b) is a perspective view of the polishing tool of another tire inner surface processing apparatus according to the present invention. (A) is a front view of the other tire inner surface processing apparatus according to this invention, (b) is the side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tire inner surface processing apparatus 2 Tire 3 Tire holder 4 Tire inner surface 5 Polishing tool 6 Pressure control equipment 7 Side support tool 8 Lower support tool 9 Pressure measuring device 10 Pressure evaluation apparatus 11 Pressure load apparatus

Claims (7)

A tire inner surface treatment method for polishing a tire inner surface through a polishing tool,
A method for treating an inner surface of a tire, comprising polishing by controlling a pressing force of the polishing tool against the inner surface of the tire.   The tire inner surface treatment method according to claim 1, wherein the pressing force of the polishing tool against the tire inner surface is constant. Pressing force against the tire inner surface of said polishing tool is in the range of 0.8~2.0N / mm ^2, a tire inner surface processing method according to claim 1 or 2. In the tire inner surface processing apparatus for polishing the tire inner surface,
The apparatus comprises: a tire holder that holds a tire; an abrasive that moves and polishes the inner surface of the tire; and a pressure control facility that controls pressure to press the inner surface of the tire by the abrasive. Tire inner surface treatment device.   The tire inner surface processing apparatus according to claim 4, wherein the polishing tool is a roller brush or a sheet brush.   6. The tire inner surface processing apparatus according to claim 4, wherein at least a portion that presses the tire inner surface is a nonwoven fabric.   The tire inner surface treatment apparatus according to claim 6, wherein the nonwoven fabric includes an abrasive.

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