JP2006035614A - Method and apparatus for modifying tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for modifying a tire which can modify the physical properties of rubber of the tire by selecting the tread surface of the tire after vulcanization and an apparatus for the method. <P>SOLUTION: The tire T with the tread surface T1 coated with a jacket 3 is arranged in a pressure container 5. The pressure container 5 is filled with supercritical carbon dioxide or liquefied carbon dioxide, and a mixture n of supercritical carbon dioxide or liquefied carbon dioxide and a rubber additive is packed in a chamber 11 surrounded by the jacket 3 and the tread surface T1 to modify the tread surface T1. After the passage of a prescribed time, while the supercritical carbon dioxide or the liquefied carbon dioxide in the pressure container 5 and the mixture n of the chamber 11 are replaced, the mixture n is discharged outside the pressure container 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tire reforming method and apparatus, and more particularly, to a tire reforming method and apparatus for modifying the physical properties of rubber constituting a tread surface of a tire.

  Generally, additives are added to rubber vulcanized products in order to impart various functions. Additives are usually added all at once during rubber kneading. The same applies to pneumatic tires, and in order to obtain various performances, a predetermined additive is added to rubber constituting the tire at the time of rubber kneading (see, for example, Patent Document 1).

Therefore, various performances of the tire are determined in advance before vulcanization, and the performance cannot be changed or further enhanced after vulcanization. In addition, the desired performance may not be obtained due to thermal decomposition of additives during molding, etc., especially to improve the physical properties of the rubber that constitutes the tread surface that contacts the road surface, which greatly affects various tire performances. A countermeasure was desired.
JP 7-304305 A

  An object of the present invention is to provide a tire reforming method and apparatus capable of selecting a tread surface of a vulcanized tire and modifying its rubber physical properties.

  According to a first tire modification method of the present invention that achieves the above object, a tire having a tread surface covered with a jacket is disposed in a pressure vessel, and the pressure vessel is filled with supercritical carbon dioxide or liquid carbon dioxide. Then, the chamber surrounded by the jacket and the tread surface is filled with a mixture of supercritical carbon dioxide or liquid carbon dioxide and a rubber additive, and the tread surface is subjected to a modification treatment by an injection operation. The mixture is discharged outside the pressure vessel while replacing the supercritical carbon dioxide or liquid carbon dioxide in the pressure vessel with the mixture in the chamber.

  In the second tire modification method of the present invention, a tire having a carrier carrying a rubber additive and a tread surface covered with a jacket is placed in a pressure vessel, and supercritical carbon dioxide or liquid is placed in the pressure vessel. The carbon dioxide is filled, and a chamber surrounded by the jacket containing the carrier and the tread surface is filled with supercritical carbon dioxide or liquid carbon dioxide, and the tread surface is subjected to a reforming process by an injection operation for a predetermined time. After the lapse of time, replacing the supercritical carbon dioxide or liquid carbon dioxide in the pressure vessel with the mixture of the supercritical carbon dioxide or liquid carbon dioxide in the chamber and the rubber additive carried on the carrier, the mixture Is discharged to the outside of the pressure vessel.

  In the third tire modification method of the present invention, a tire having a tread surface to which a rubber additive is added and covered with a jacket is disposed in a pressure vessel, and the pressure vessel is filled with supercritical carbon dioxide or liquid carbon dioxide. In addition, the chamber surrounded by the tread surface is filled with supercritical carbon dioxide or liquid carbon dioxide, and the tread surface is subjected to a reforming process by an injection operation. After a predetermined time has elapsed, the supercritical dioxide in the pressure vessel is The mixture is discharged outside the pressure vessel while replacing carbon or liquid carbon dioxide with supercritical carbon dioxide or liquid carbon dioxide in the chamber and a mixture of the rubber additive supported on the carrier. And

  In the fourth tire modification method of the present invention, supercritical carbon dioxide or liquid carbon dioxide is filled in a pressure vessel containing a tire in which an adsorbent container containing an adsorbent is attached to a tread surface. A free component of the additive added to the tread rubber, which leaks from the tread surface due to penetration of carbon dioxide or liquid carbon dioxide into the tire, is adsorbed by the adsorbent.

  A first tire reforming apparatus according to the present invention includes an annular jacket that covers a tread surface of a tire, a pressure vessel that accommodates the tire covered with the jacket, and supercritical carbon dioxide or liquid carbon dioxide in the pressure vessel. Supply means for supplying; introducing means for introducing supercritical carbon dioxide or liquid carbon dioxide in the pressure vessel into a chamber surrounded by a jacket and a tread surface; and supercritical carbon dioxide or liquid carbon dioxide from the chamber; Discharge means for discharging the mixture of rubber additives to the outside of the pressure vessel is provided.

  A second tire reforming apparatus of the present invention includes an annular adsorbent container attached to a tread surface of a tire, a pressure vessel in which a tire with the adsorbent container attached is placed, and supercritical carbon dioxide or And a supply means for supplying liquid carbon dioxide.

  According to the first to third tire modification methods of the present invention described above, the tread surface is covered with a jacket, and supercritical carbon dioxide or liquid carbon dioxide and a rubber additive are contained in a chamber surrounded by the tread surface and the jacket. The rubber tread surface of the tire after vulcanization can be infused into the rubber of the tread surface together with supercritical carbon dioxide or liquid carbon dioxide. The rubber properties can be modified by selecting.

  According to the fourth tire modification method of the present invention described above, the adsorbent container containing the adsorbent is attached to the tread surface, and supercritical carbon dioxide or liquid carbon dioxide is filled in the pressure vessel. Since critical carbon dioxide or liquid carbon dioxide penetrates into the tire and the free component of the additive added to the tread rubber leaks from the tread surface and can be adsorbed by the adsorbent, the vulcanized tire The rubber properties can be modified by selecting the tread surface.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals, and redundant description is omitted.

  1 and 2 show an example of a tire reforming apparatus used in the first tire reforming method of the present invention. This tire reforming apparatus 1A covers a tread surface T1 of a tire (pneumatic tire) T. Jacket 3, pressure vessel 5 containing tire T covered with jacket 3, supply means 7 for supplying supercritical carbon dioxide into pressure vessel 5, and supercritical carbon dioxide in pressure vessel 5 are discharged to the outside. The discharge means 9, the introduction means 13 for introducing the supercritical carbon dioxide in the pressure vessel 5 into the chamber 11 surrounded by the jacket 3 and the tread surface T1, and the supercritical carbon dioxide and the rubber additive in the chamber 11 Supply means 15 for supplying the mixture and discharge means 17 for discharging the mixture from the chamber 11 to the outside of the pressure vessel 5 are provided.

  The jacket 3 is formed in an annular shape having a concave inner peripheral side, and includes a pair of semicircular jacket halves 19. One end of the jacket half 19 is connected to each other, and the other end is connectable. The pair of jacket halves 19 is openable and closable around an end where the pair of jacket halves 19 are closed. At the end in the width direction of the jacket half 19, a sealing member 21 extending along the end is provided. When the jacket 3 is attached to the tread surface T 1 of the tire T as shown in FIG. The part 11 can be sealed.

  The pressure vessel 5 includes a container main body 23 that accommodates the tire T covered with the jacket 3 and a lid body 25 that covers the container main body 23.

  The supply means 7 for supplying supercritical carbon dioxide into the pressure vessel 5 includes a supply source 27 for supplying supercritical carbon dioxide, a supply pipe 29 connected between the supply source 27 and the lid 25, A supply pump 31 installed in the supply pipe 29 is provided. By operating the supply pump 31, supercritical carbon dioxide can be supplied from the supply source 27 through the supply pipe 29 into the pressure vessel 5.

  The discharge means 9 for discharging the supercritical carbon dioxide in the pressure vessel 5 to the outside includes a recovery tank 33 for storing the supercritical carbon dioxide discharged to the outside, and a discharge connected between the recovery tank 33 and the lid body 25. A pipe 35 and an open / close valve 37 installed in the discharge pipe 35 are provided. By opening the on-off valve 37, the supercritical carbon dioxide in the pressure vessel 5 can be recovered in the recovery tank 33.

  The introducing means 13 for introducing the supercritical carbon dioxide in the pressure vessel 5 into the chamber part 11 flows into the pipe part 39 attached to the jacket 3 so as to communicate with the chamber part 11. It is the structure which provided the one way valve 41 which enables this.

  Supply means 15 for supplying the mixture of supercritical carbon dioxide and rubber additive to the chamber 11 includes a tank 43 for storing the mixture n, a supply pipe 45 connected between the tank 43 and the jacket 3, A supply pump 47 installed in the supply pipe 45 is provided. The supply pipe 45 can be detachably connected to the jacket 3, and the mixture n is supplied from the tank 43 through the supply pipe 45 into the chamber 11 by the operation of the supply pump 47.

  The discharge means 17 for discharging the mixture n from the chamber 11 to the outside of the pressure vessel 5 includes a recovery tank 49 for storing the mixture discharged to the outside, and a discharge pipe 51 connected between the recovery tank 49 and the jacket 3. The discharge pipe 51 is provided with an open / close valve 53. The discharge pipe 51 can also be detachably connected to the jacket 3, and the mixture n in the chamber 11 can be collected in the collection tank 49 by opening the opening / closing valve 53.

  Hereinafter, the first tire reforming method of the present invention will be described using the tire reforming apparatus 1A described above.

  First, the jacket 3 is attached to the tire T so as to cover the tread surface T1. Next, the tire T to which the jacket 3 is attached is disposed in the container main body 23 of the pressure container 5. After connecting the supply pipe 45 and the discharge pipe 51 to the jacket 3, the container body 23 is closed by the lid body 25.

  The supply means 7 for supplying supercritical carbon dioxide into the pressure vessel 5 is operated to fill the pressure vessel 5 with supercritical carbon dioxide from the supply source 27, while supplying means 15 for supplying the mixture n to the chamber 11. The chamber 11 is filled with a mixture n of supercritical carbon dioxide and a rubber additive from the tank 43.

  The reason why the supercritical carbon dioxide is filled in the pressure vessel 5 is to balance the pressure inside the chamber 11 and the pressure outside the chamber 11. As the rubber additive, any rubber additive may be used as long as the rubber physical properties can be modified. For example, an amine-based anti-aging agent can be preferably exemplified. By injecting the amine-based anti-aging agent, the aging of the rubber on the tread surface 1 can be suppressed and the life can be extended.

  By maintaining this state for a predetermined time after filling, the tread surface T1 is reformed. That is, the rubber additive penetrates into the tread surface T1 together with the supercritical carbon dioxide, and the rubber additive is injected into the tread rubber T2 constituting the tread surface T1, thereby modifying the rubber physical properties.

  After a predetermined time has elapsed, the opening / closing valve 53 of the discharge means 17 that discharges the mixture n from the chamber 11 to the outside of the pressure vessel 5 is opened. Thereby, the mixture n in the chamber 11 is discharged toward the external collection tank 49 and collected. The supercritical carbon dioxide in the pressure vessel 5 flows into the chamber portion 11 through the one-way valve 41 in the chamber portion 11 whose pressure has been reduced by this discharge, and the mixture n in the chamber portion 11 becomes the pressure vessel 5. It is replaced with supercritical carbon dioxide. By this replacement, the inside of the chamber portion 11 is cleaned with supercritical carbon dioxide.

  When all the mixture n in the chamber 11 is recovered in the recovery tank 49 and replaced with the supercritical carbon dioxide in the pressure vessel 5, the discharge means 9 for discharging the supercritical carbon dioxide in the pressure vessel 5 to the outside is opened and closed. The valve 53 is opened, and supercritical carbon dioxide in the pressure vessel 5 is discharged and recovered in the external recovery tank 33. After the collection is completed, the tire T with the jacket 3 attached is taken out of the pressure vessel 5 and the jacket 3 is removed to obtain a tire with improved rubber properties of the tread rubber T2.

  According to the above-described present invention, the tread surface T1 is covered with the jacket 3, and the chamber portion 11 is filled with the mixture n of supercritical carbon dioxide and the rubber additive to perform the modification process of the tread surface T1. Since the rubber additive can be infiltrated into the rubber of the tread surface T1 together with the supercritical carbon dioxide, the rubber property can be improved by selecting the tread surface T1 of the vulcanized tire T.

  Further, since the mixture n in the chamber 11 is discharged while supercritical carbon dioxide in the pressure vessel 5 and the mixture n in the chamber 11 are replaced, the inner surface of the jacket 3 soiled with the rubber additive Can be cleaned with supercritical carbon dioxide, and the cleaning operation of the jacket 3 after the completion of the reforming operation can be made unnecessary.

  In addition, since the one-way valve 41 is used for the introducing means 13 and the discharging means 17 is configured to discharge the mixture n in the chamber 11 to the outside by operating the opening / closing valve 53 and collect it in the collecting tank 49. By opening the valve 53, the recovery of the mixture n in the chamber 11 and the cleaning of the inner surface of the jacket 3 can be simultaneously performed with a simple configuration.

  FIG. 3 shows an example of a tire reforming apparatus used in the second and third tire reforming methods of the present invention. The tire reforming apparatus 1B is configured such that in the tire reforming apparatus 1A described above, the supply means 15 for supplying the mixture n of supercritical carbon dioxide and the rubber additive to the chamber portion 11 is not provided.

  Hereinafter, the second tire reforming method of the present invention will be described using the tire reforming apparatus 1B. First, the jacket 3 is attached to the tire T so as to cover the tread surface T1. At that time, as shown in FIG. 4, a jacket 3 is attached by putting a carrier K such as a nonwoven fabric carrying a rubber additive into a chamber 11 in the jacket 3. Next, the tire T to which the jacket 3 is attached is disposed in the container main body 23 of the pressure container 5. After connecting the discharge pipe 51 to the jacket 3, the container body 23 is closed by the lid body 25.

  The supply means 7 for supplying supercritical carbon dioxide into the pressure vessel 5 is operated to fill the pressure vessel 5 with supercritical carbon dioxide from the supply source 27. By this filling, the supercritical carbon dioxide is also filled into the chamber portion 11 containing the carrier K through the one-way valve 41. When supercritical carbon dioxide is filled into the chamber 11, the rubber additive carried by the carrier K is mixed with the supercritical carbon dioxide, and a mixture of the rubber additive and supercritical carbon dioxide is formed in the chamber 11. Is done.

  Thereafter, in the same manner as described above, after filling, the tread surface T1 is subjected to reforming treatment while maintaining the state for a predetermined time. After a predetermined time has elapsed, the supercritical carbon dioxide in the pressure vessel 5 and the chamber 11 While replacing the mixture of rubber additive and supercritical carbon dioxide, the mixture in the chamber 11 is discharged outside the pressure vessel 5 and collected in the collection tank 49. Further, after the supercritical carbon dioxide in the pressure vessel 5 is recovered, the tire T with the jacket 3 attached is taken out of the pressure vessel 5 and the jacket 3 is removed to obtain a tire with improved rubber properties of the tread rubber T2.

  Incidentally, in a laboratory test, an amine-based anti-aging agent is used as a rubber additive, a non-woven fabric is used as a carrier K, and supercritical carbon dioxide at a temperature of about 32 ° C. and a pressure of about 10 MPa is filled into the chamber 11 and the pressure vessel 5. The tire was maintained for 15 minutes to obtain a tire with modified rubber properties of the tread rubber T2, and when the tread rubber T2 of the tire was examined, the amine anti-aging agent penetrated and the tread rubber T2 was modified. I confirmed that it was.

  The third tire modification method of the present invention is the above-described second tire modification method, in which instead of the carrier K carrying the rubber additive, a rubber additive is added to the tread surface T1 by coating or the like, The tread surface T1 is covered with a jacket 3.

  Thus, the second and third tire reforming methods of the present invention can provide the same effects as described above, and can further simplify the apparatus.

  Of course, if it is not necessary to simplify the apparatus, instead of the supply means 15 for supplying the mixture 11 of supercritical carbon dioxide and rubber additive to the chamber 11, only supercritical carbon dioxide is supplied to the chamber 11. You may make it provide the supply means to supply.

  5 and 6 show an example of a tire modifying apparatus used in the fourth tire modifying method of the present invention. In the first to third tire reforming methods described above, the rubber constituting the tread surface T1 of the tire T is reformed by injecting a rubber additive. On the contrary, the tread rubber T2 constituting the tread surface T1 is modified by extracting and removing the additive added to the tread rubber during tire manufacture.

  The tire reforming apparatus 1C used in the fourth tire reforming method is configured such that the tire reforming apparatus 1B does not further include the introducing means 13 and the discharging means 17. Moreover, it replaces with the jacket 3 and the adsorbent accommodating body 60 which accommodates the adsorbent c is used.

  An annular adsorbent container 60 attached to the tread surface T1 of the tire T is composed of a pair of semicircular container halves 62. One ends of the container halves 62 are connected to each other, and the other ends are connected. It is possible. The pair of housing halves 62 can be opened and closed in a closed state and an open state around the connected ends.

  Each container half 62 includes a half body 64 having a concave cross section attached to the tread surface T1, and a coarse air permeability that is attached along the peripheral edge of the half body 64 so as to close the concave portion. A chamber 68 for accommodating the adsorbent c is formed between the half body 64 and the sheet-like member 66. A plurality of through holes 70 are formed in the half body 64, and the supercritical carbon dioxide filled in the pressure vessel 5 is filled into the chamber 68 through the through holes 70.

  The adsorbent container 60 can accommodate the adsorbent c, and can have a structure capable of immersing the adsorbent accommodated in the supercritical carbon dioxide filled in the pressure vessel 5 and reaching the tread surface T1. The structure may be adopted.

  Hereinafter, the fourth tire reforming method of the present invention will be described using the tire reforming apparatus 1C.

  First, as shown in FIG. 6, the adsorbent container 60 that contains the adsorbent c in the chamber 68 is attached to the tread surface T <b> 1 of the tire T. Next, the tire T to which the adsorbent container 60 is attached is disposed in the pressure vessel 5.

  The supply means 7 for supplying supercritical carbon dioxide into the pressure vessel 5 is operated to fill the pressure vessel 5 with supercritical carbon dioxide from the supply source 27. The filled supercritical carbon dioxide soaks and penetrates from the surface of the tire T including the tread surface T1. Thereby, the free component of the additive added to the rubber of the tire T leaks from the tire surface.

  The free component of the additive in the rubber leaking from the tire surface is saturated in the supercritical carbon dioxide within the easy pressure 5 in a slight amount, and the leakage stops, but the adsorbent c is disposed on the tread surface T1. Therefore, the free component of the additive in the leaked rubber is adsorbed by the adsorbent c. Therefore, the free component of the additive in the tread rubber continues to leak from the tread surface T1, and is extracted and removed.

  The adsorbent c may be any adsorbent as long as it can adsorb the free component of the additive in the desired rubber. For example, when adsorbing the oil content of the free component, As the adsorbent, an adsorbent that adsorbs oil, such as activated carbon or zeolite, can be preferably used.

  As the rubber used for the tread rubber of a tire, a rubber composition in which carbon, silica, or the like is filled and compounded for reinforcement is used. An oil component is generally added to the rubber composition for the purpose of improving processability and dispersibility. However, in order to obtain good processability, an unnecessary oil component is added, which contributes to a decrease in tire performance, for example, wear resistance. Therefore, a tire that uses an adsorbent that adsorbs oil to the adsorbent c and reduces the oil content of the tread rubber by adsorbing the oil can improve the wear resistance.

  After performing the extraction and removal for a predetermined time, the opening / closing valve 53 of the discharge means 9 for discharging the supercritical carbon dioxide in the pressure vessel 5 to the outside is opened, and the supercritical carbon dioxide in the pressure vessel 5 is discharged to the outside. Collect in the collection tank 33. After completion of the collection, the tire T with the adsorbent container 60 attached is removed from the pressure vessel 5, and the adsorbent container 60 is removed to obtain a tire with improved rubber properties of the tread rubber T2.

  By attaching the adsorbent container 60 containing the adsorbent c to the tread surface T1 and filling the pressure vessel 5 with supercritical carbon dioxide, the supercritical carbon dioxide penetrates into the tire T, and the tread. Since the free component of the additive added to the tread rubber T2 is leaked from the surface T1 and can be adsorbed by the adsorbent c, the rubber physical properties are improved by selecting the tread surface T1 of the vulcanized tire T. Can be quality.

  In the embodiment described above, supercritical carbon dioxide is used in the present invention, but liquid carbon dioxide may be used instead of supercritical carbon dioxide. In that case, liquid carbon dioxide in a region called liquid carbon dioxide near the critical point, which is called supercritical, subcritical and slightly lower temperature can be preferably used. The same effect as described above can be obtained by using liquid carbon dioxide.

  Further, as described above, when the tire is immersed in supercritical carbon dioxide, a small amount of free component of the additive leaks from the rubber on the tire surface. In order to suppress this, it is preferable to cover the surface of the tire portion not subjected to the modification treatment with a covering member such as an aluminum foil. This coating is performed after or before the jacket 3 and the adsorbent container 60 are attached.

It is the schematic which shows an example of the tire modification apparatus used for the 1st tire modification method of this invention. It is an enlarged view which shows the state which attached the jacket of FIG. 1 to the tire in a cross section. It is the schematic which shows an example of the tire modification apparatus used for the 2nd tire modification method of this invention. It is an enlarged view which shows the state which attached the jacket of FIG. 3 to the tire in a cross section. It is the schematic which shows an example of the tire modification apparatus used for the 4th tire modification method of this invention. It is an enlarged view which shows the state which attached the adsorbent container of FIG. 5 to the tire in a cross section.

Explanation of symbols

1A, 1B, 1C Tire reformer 3 Jacket 5 Pressure vessel 7 Supply means 9 Discharge means 11 Chamber 13 Introduction means 15 Supply means 17 Discharge means 41 One-way valve 53 Opening / closing valve 60 Adsorbent container K Carrier T Tire T1 Tread surface T2 Tread rubber c Adsorbent n Mixture

Claims (10)

  A tire whose tread surface is covered with a jacket is placed in a pressure vessel, and the pressure vessel is filled with supercritical carbon dioxide or liquid carbon dioxide, and the chamber surrounded by the jacket and the tread surface is supercritical carbon dioxide. Alternatively, a mixture of liquid carbon dioxide and a rubber additive is filled and a modification process is performed by an injection operation on the tread surface. After a predetermined time has elapsed, supercritical carbon dioxide or liquid carbon dioxide in the pressure vessel and the chamber A tire reforming method of discharging the mixture to the outside of the pressure vessel while replacing the mixture.   A tire bearing a rubber additive and a tread surface covered with a jacket is placed in a pressure vessel, and the pressure vessel is filled with supercritical carbon dioxide or liquid carbon dioxide, and the carrier is placed in the tire. The chamber surrounded by the jacket and the tread surface is filled with supercritical carbon dioxide or liquid carbon dioxide, and the tread surface is subjected to a reforming process by an injection operation. Tire modification for discharging carbon or liquid carbon dioxide and supercritical carbon dioxide or liquid carbon dioxide in the chamber and a mixture of rubber additive carried on the carrier and discharging the mixture to the outside of the pressure vessel Method.   A tire in which a tread surface to which a rubber additive has been added is covered with a jacket is placed in a pressure vessel, and the pressure vessel is filled with supercritical carbon dioxide or liquid carbon dioxide, and is enclosed by the jacket and the tread surface. The supercritical carbon dioxide or liquid carbon dioxide is filled in the part and the tread surface is subjected to a modification treatment by an injection operation. After a predetermined time has elapsed, the supercritical carbon dioxide or liquid carbon dioxide in the pressure vessel and the chamber A tire reforming method in which supercritical carbon dioxide or liquid carbon dioxide and a mixture of a rubber additive supported on a support are replaced and the mixture is discharged to the outside of the pressure vessel.   The tire reforming method according to claim 2 or 3, wherein the supercritical carbon dioxide or liquid carbon dioxide filled in the chamber is supercritical carbon dioxide or liquid carbon dioxide filled in the pressure vessel.   A supercritical carbon dioxide or liquid carbon dioxide is filled in a pressure vessel containing a tire having an adsorbent container containing an adsorbent attached to the tread surface, and the supercritical carbon dioxide or liquid carbon dioxide penetrates into the tire. The tire reforming method of adsorbing free components of the additive added to the tread rubber leaked from the tread surface by the adsorbent.   The tire reforming method according to claim 5, wherein after the adsorbent containing body containing the adsorbent is attached to the tread surface of the tire, the tire is disposed in the pressure vessel.   The tire reforming method according to claim 5 or 6, wherein the free component is an oil component, and the adsorbent is an adsorbent that adsorbs the oil component.   An annular jacket that covers the tread surface of the tire, a pressure vessel that accommodates the tire covered with the jacket, supply means for supplying supercritical carbon dioxide or liquid carbon dioxide into the pressure vessel, Introducing means for introducing critical carbon dioxide or liquid carbon dioxide into a chamber surrounded by a jacket and a tread surface, and discharging a mixture of supercritical carbon dioxide or liquid carbon dioxide and a rubber additive from the chamber to the outside of the pressure vessel A tire reformer provided with a discharging means.   The tire reforming apparatus according to claim 8, further comprising a supply unit that supplies supercritical carbon dioxide or a mixture of liquid carbon dioxide and a rubber additive to the chamber.   An annular adsorbent container attached to a tread surface of a tire, a pressure vessel for storing a tire equipped with the adsorbent container, and a supply means for supplying supercritical carbon dioxide or liquid carbon dioxide into the pressure vessel. Tire reformer.

Images