JP2008230143A - Method for producing tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a tire equipped with electronic parts positioned in such a way that only a certain part of a surface is directly connected to a hole communicating with an inner space of a tire without buffing cap like projections and covering rubbers. <P>SOLUTION: In forming a green tire 10, electronic parts 4 is patched in an inner front surface of an inner liner rubber 11 in such a way that a prescribed part of the surface is directed to the inner front surface of a tire, then a rubber sheet 15 is patched to a surface of the inner liner rubber 11 so as to cover the electronic parts 4, a through-hole 9 is formed on a position corresponding to the prescribed part of a surface of the electronic parts 4 on the rubber sheet 15, a rubber sheet 14 which is not flown upon vulcanization of the tire is patched to a surface side of the rubber sheet 15 at the tire inner surface side of the rubber sheet 15 so as to cap the through-hole 9, and the non-flowing sheet 14 is peeled off from the rubber sheet 15 after vulcanization of the tire. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention manufactures a tire having an electronic component in which a hole leading to a tire lumen formed when mounted on a rim is formed and only a predetermined surface portion is exposed at the bottom of the hole. The present invention relates to a method for manufacturing a tire, and particularly relates to a method for improving productivity.

  Conventionally, as a means for transmitting tire-related information including a tire state to a tire information management device provided on the vehicle body side, for example, a sensor that detects tire information, an electronic circuit that processes information from the sensor, and transmission It has been proposed to embed an electronic component equipped with an antenna or the like in a tire, and in particular, the pressure or temperature of the tire lumen surrounded by the tire and the rim is detected when the tire is mounted on the rim. In order to obtain high detection accuracy, the electronic component including the sensor is embedded in the tire so that the sensor contacts the tire lumen.

  FIG. 1 is a cross-sectional view showing a tire in a state where it is mounted on a rim. FIG. 2 is an enlarged cross-sectional view showing a portion of the tire in which electronic components are embedded. A hole 5 that communicates with the tire lumen 3 formed under the mounting condition is formed, and a plate-like electronic component 4 is disposed on the tire lumen 3 side of the inner liner 12. Only a part is embedded in the tire so as to be exposed at the bottom of the hole 5. A sensor 8 that detects the pressure and temperature of the tire lumen 3 is disposed on the predetermined surface portion 7 of the electronic component 4 exposed at the bottom of the hole 5.

  Conventionally, in order to manufacture such a tire, as shown in a partial cross-sectional view in FIG. 3, a housing having a cap-shaped protrusion 93 that seals a space 92 having a predetermined surface portion 7 of the electronic component 4 as a bottom surface in advance. 4 is a cross-sectional view of a green tire, and FIG. 5 is an enlarged view of the green tire portion to which an electronic component is attached. 11 is attached to the tire inner surface side, and then the rubber sheet 95 is attached to the tire inner surface side of the inner liner rubber 11 so as to cover the entire surface of the casing 91 to obtain a green tire 90.

Thereafter, the green tire 90 is vulcanized. As shown in FIG. 6, the vulcanized tire portion to which the electronic component 4 is attached is composed of a casing 91 and an electronic component 4 on the inner side thereof. 11 and the cover rubber 95 are completely buried, but thereafter, the cover rubber 95 and the cap-shaped protrusion 93 of the housing 91 are buffed until the illustrated surface F is exposed, As shown in FIG. 7, a space 92 that is in direct contact with the predetermined surface portion 7 of the electronic component 4 can be communicated with the tire lumen 3.
JP 2002-2104060 A

  However, the operation of buffing the cover rubber 95 and the cap-shaped protrusion 93 takes time, and if the casing 91, especially the cap-shaped protrusion 93 is not provided, the cover rubber 95 is vulcanized. It must be made of a hard material that does not flow even during vulcanization of the tire. It took a lot of time and man-hours, and improvement was required.

  The present invention has been made in view of such problems, and only a predetermined surface portion is arranged so as to be in direct contact with a hole communicating with the tire lumen without buffing the cap-shaped protrusion and the cover rubber. Another object of the present invention is to provide a method for manufacturing a tire having electronic components.

<1> is disposed on the tire inner surface side of the inner liner only on the tire inner surface, and only a predetermined portion of the surface is embedded as a predetermined surface portion so as to be exposed at the bottom of the hole In a method of manufacturing a tire comprising an electronic component,
When forming a green tire, an electronic component affixing step for affixing the electronic component on the tire inner surface side of the inner liner rubber so that the predetermined surface portion faces the tire inner surface side;
After the electronic component affixing step, a rubber sheet affixing step of affixing the rubber sheet to the tire inner surface side of the inner liner rubber so as to cover the entire electronic component;
A through hole forming step of forming a through hole at a position corresponding to a predetermined surface portion of the electronic component of the rubber sheet;
After the rubber sheet sticking step, a non-flowable sheet made of a material that does not flow during tire vulcanization is closed on the tire inner surface side of the rubber sheet so that the through hole is closed on the tire inner surface side of the rubber sheet. A non-fluid sheet pasting step for pasting,
After the tire is vulcanized, the non-fluid sheet peeling step of opening a hole directly contacting the predetermined surface portion of the electronic component on the inner surface of the tire by peeling the non-fluid sheet from the rubber sheet. A tire manufacturing method.

  <2> is a method for manufacturing a tire using a semi-vulcanized rubber as a material for the rubber sheet to be attached to the inner liner rubber in <1>.

  <3> is a method for manufacturing a tire using a resin film as the non-flowable sheet in <1> or <2>.

  <4> is a tire according to any one of <1> to <3>, including a step of attaching a rubber cushion sheet to a tire inner surface side of the non-flowable sheet after the non-flowable sheet attaching step. It is a manufacturing method.

  <5> is any one of <1> to <4>, wherein the through-hole forming step is arranged before the rubber sheet attaching step, and a rubber sheet in which the through-hole is formed in advance is used as the through-hole. It is a manufacturing method of a tire stuck on inner liner rubber in the state where it was positioned so as to correspond to the predetermined surface portion of the electronic parts.

  According to <1>, when forming a green tire, an electronic component pasting step of pasting the electronic component on the tire inner surface side of the inner liner rubber so that the predetermined surface portion faces the tire inner surface side; A rubber sheet affixing step for adhering the rubber sheet to the inner surface of the inner liner rubber so as to cover the entire electronic component after the electronic component affixing step; and a predetermined surface portion of the electronic component of the rubber sheet A non-flowable sheet made of a material that does not flow during tire vulcanization on the tire inner surface side of the rubber sheet after the through hole forming step of forming a through hole at a position corresponding to A non-flowable sheet sticking step for sticking the rubber sheet on the tire inner surface side so as to close the through hole, and after vulcanizing the tire, Since the non-fluid sheet is peeled off from the rubber sheet, the non-fluid sheet peeling step of opening a hole directly in contact with the predetermined surface portion of the electronic component to the inner surface of the tire is provided. By simply removing the fluid sheet, it is possible to form a hole that is in direct contact with the predetermined surface portion and opens in the tire lumen.

  According to the present invention, the cap-like protrusions of the housing that are essential in the prior art are unnecessary, and thus the housing itself is not necessary, and a great effect can be achieved in that respect.

  According to <2>, semi-vulcanized rubber is used as the material of the rubber sheet to be affixed to the inner liner rubber. Can be.

  According to <3>, since the resin film is used as the non-flowable sheet, the operation of peeling the non-flowable sheet from the rubber sheet is further facilitated while suppressing the movement of the rubber sheet during vulcanization. be able to.

  The effect <4> will be described. If the electronic component is square, the thin non-flowable sheet is also squared accordingly, and there is a risk of damaging a core such as a bladder during tire vulcanization. According to <4>, After the non-fluid sheet pasting step, a rubber cushion sheet is affixed to the inner surface of the tire in order to prevent damage to the core. By sticking on the top so that it does not protrude from it, the cushion sheet can be removed at the same time by simply peeling off the non-flowable sheet after vulcanizing the tire.

  According to <5>, the rubber sheet in which the through hole is formed in advance is attached to the inner liner rubber in a state in which the through hole is positioned so as to correspond to the predetermined surface portion of the electronic component. Can be formed.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 8 is a cross-sectional view showing a green tire according to the present invention, and FIG. 9 is a cross-sectional view showing a green tire portion to which an electronic component is attached, and the present invention forms a green tire 10. At the time, the electronic component 4 is attached to the inner liner rubber 11 on the tire inner surface side so that the predetermined surface portion 7 faces the tire inner surface side, and after this electronic component attaching step, a rubber sheet is attached. 15 is affixed to the tire inner surface side of the inner liner rubber 11 so as to cover the entire electronic component 4, and a through hole is formed at a position corresponding to the predetermined surface portion 7 of the electronic component 4 of the rubber sheet 15. After the through hole forming step for forming 9 and the rubber sheet sticking step, the tire inner surface side of the rubber sheet 15 is made of a material that does not flow during tire vulcanization. Fluidity sheet 14 to the tire inner surface side of the rubber sheet 15, comprising a non-flowable sheet sticking step of sticking so as to close the through hole 9.

  The through-hole forming step can be arranged either before or after the rubber sheet attaching step. However, in terms of ease of operation, the through-hole 9 is used as the rubber sheet 15 in which the through-hole 9 is formed. The rubber sheet 15 is preferably attached to the inner liner rubber 11 in a state of being positioned so as to correspond to the predetermined surface portion 7 of the electronic component 4.

  FIG. 10 is a cross-sectional view showing a portion where an electronic component is embedded in a vulcanized tire. In the tire manufacturing method of the present invention, after the tire is vulcanized, FIG. 11 shows the same portion in a cross-sectional view. As described above, a non-fluid sheet peeling process for peeling the non-fluid sheet 14 from the rubber sheet 15 is provided, and through this process, the hole 9 that directly contacts the predetermined surface portion 7 of the electronic component 4 is communicated with the tire lumen. Can do. In FIG. 10, reference numeral 16 denotes a vulcanized rubber sheet portion.

  In the present invention, the non-flowable sheet 14 acts to prevent the rubber sheet 15 from flowing during vulcanization and the through holes 9 from being blocked. Any material can be used as long as it does not flow during vulcanization, can be easily attached to the rubber sheet 15, and can be easily peeled off from the vulcanized rubber sheet. A resin film typified by a film can be suitably used.

  Further, the sheet rubber 15 is not particularly limited, but it is preferable to use the same material as that of the inner liner rubber because good adhesiveness can be obtained. The rubber sheet 15 is preliminarily preliminarily vulcanized by a semi-vulcanizing mold, irradiated with an electron beam, or the like in order to prevent the rubber sheet 15 from flowing and closing the hole during vulcanization. Semi-vulcanized materials can be used, but in this case, a semi-vulcanized mold, electron beam irradiation device, etc. are required. Good.

  Here, when there is a sharp part in the electronic component 4, even if it is covered with the rubber sheet 15 or the non-fluid sheet 14, the sharp part also appears in the non-fluid sheet 14. In order to vulcanize, when the green tire 10 is mounted on a core such as a bladder, the core may be damaged. When forming the green tire 10 so as not to damage these vulcanized parts, As shown in a cross-sectional view in FIG. 12, a rubber cushion sheet 13 is attached to the tire inner surface side of the non-flowable sheet 14 to reduce the impact when hitting the vulcanized part and prevent damage. Is preferred. In this case, when the non-flowable sheet 14 is peeled off from the rubber sheet after vulcanization, the cushion sheet 13 is also preferably removed simultaneously with the non-flowable sheet 14, as shown in FIG. The cushion sheet 13 is preferably pasted using a material that does not protrude from the non-flowable sheet 14.

  An electronic component 4 having a diameter of 10 mm and a height of 5.0 mm is arranged on the surface of the inner liner rubber 11, and a rubber sheet 15 made of the same material as the inner liner rubber 11 is covered with the inner rubber sheet 15 so as to cover the electronic component 4. The liner rubber 11 was attached to the tire inner surface side. As the rubber sheet 15, a rubber sheet having a diameter of 30 mm and a thickness of 2.0 mm was used.

  Next, a through hole 9 that is in direct contact with the predetermined surface portion 7 of the electronic component 4 is formed in the rubber sheet 15, and then a non-flowable sheet 14 having a diameter of 10 mm and a thickness of 0.05 is formed so as to cover the through hole 9. A mm PET film was applied. Then, since there was a sharp portion at the corner of the electronic component, a rubber cushion sheet (diameter 8 mm, thickness 0.8 mm) was affixed to the tire inner surface side of the non-flowable sheet 14.

  After vulcanization of the green tire, the non-flowable sheet 14 was peeled off. At this time, the cushion sheet 13 could be removed at the same time.

  Finally, it was visually confirmed that the electronic component 4 was securely embedded in the tire, and the hole 9 was not narrowed, and the predetermined surface portion of the electronic component 4 led to the tire lumen through the hole 9. .

  The present invention can be suitably used for tires of various types and applications.

It is sectional drawing which shows the tire in the state with which the rim | limb was mounted | worn. It is sectional drawing which expands and shows the part of the tire with which the electronic component was embed | buried. It is sectional drawing which shows the housing | casing which accommodates an electronic component in the conventional tire manufacturing method. It is sectional drawing which shows the green tire in the conventional tire manufacturing method. It is sectional drawing which shows the green tire part in which the electronic component was affixed in the conventional tire manufacturing method. It is sectional drawing in the conventional tire manufacturing method, the tire part in which the electronic component was affixed after vulcanization | cure. It is sectional drawing in the conventional tire manufacturing method after the buffing and the tire part in which the electronic component was affixed. It is sectional drawing which shows the green tire which concerns on this invention. It is sectional drawing which shows the green tire part in which the electronic component was affixed. It is sectional drawing which shows the vulcanized tire part by which the electronic component was embed | buried. It is sectional drawing which shows the vulcanized tire part by which the electronic component was embed | buried in the state after peeling a non-fluid sheet | seat. It is sectional drawing which shows the green tire part in which the electronic component in another embodiment was affixed. It is sectional drawing which shows the vulcanized tire part by which the electronic component was embed | buried in the state after peeling off the non-flowable sheet | seat in other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tire 2 Rim 3 Tire inner cavity part 4 Electronic component 5 Hole 7 The predetermined surface part of an electronic component 8 Sensor 9 Through-hole 10 Green tire 11 Inner liner rubber 12 Inner liner 13 Cushion sheet 14 Non-fluid sheet 15 Rubber sheet 16 Vulcanization Finished rubber sheet part

Claims (5)

A method of manufacturing a tire comprising a hole that opens only on the inner surface of the tire, and an electronic component that is disposed on the inner surface side of the inner liner and embedded in such a manner that only a predetermined surface portion is exposed at the bottom of the hole In
When forming a green tire, an electronic component affixing step for affixing the electronic component on the tire inner surface side of the inner liner rubber so that the predetermined surface portion faces the tire inner surface side;
After the electronic component affixing step, a rubber sheet affixing step of affixing the rubber sheet to the tire inner surface side of the inner liner rubber so as to cover the entire electronic component;
A through hole forming step of forming a through hole at a position corresponding to a predetermined surface portion of the electronic component of the rubber sheet;
After the rubber sheet sticking step, a non-flowable sheet made of a material that does not flow during tire vulcanization is closed on the tire inner surface side of the rubber sheet so that the through hole is closed on the tire inner surface side of the rubber sheet. A non-fluid sheet pasting process to be pasted,
After the tire is vulcanized, the non-fluid sheet peeling step of opening a hole in direct contact with the predetermined surface portion of the electronic component on the inner surface of the tire by peeling the non-fluid sheet from the rubber sheet. A tire manufacturing method.   The tire manufacturing method according to claim 1, wherein semi-vulcanized rubber is used as a material of a rubber sheet to be attached to the inner liner rubber.   The tire manufacturing method according to claim 1, wherein a resin film is used as the non-flowable sheet.   The tire manufacturing method according to any one of claims 1 to 3, further comprising a step of affixing a rubber cushion sheet on the tire inner surface side of the non-fluid sheet after the non-fluid sheet affixing step.   The through-hole forming step is arranged before the rubber sheet attaching step, and the inner liner is positioned in a state where the through-hole is formed so that the through-hole corresponds to a predetermined surface portion of the electronic component. The tire manufacturing method according to claim 1, wherein the tire is attached to rubber.

Images