Solid tire and method for manufacturing same
In a solid tire including a tread rubber layer on a road contact surface side and a base rubber layer on a rim side, the base rubber layer has JIS-A hardness of 80 or higher, and an RFID tag is embedded in the base rubber layer. When forming an unvulcanized tire by winding a rubber sheet into multiple layers, the RFID tag is inserted between layers of the rubber sheet in the middle of the winding into multiple layers, or the RFID tag and a coating layer are overlaid and attached on a side surface of the unvulcanized tire, and then the unvulcanized tire including the RFID tag is vulcanized in a mold.
1. A solid tire, comprising:
a tread rubber layer on a road contact surface side of the solid tire, the road contact surface side being configured to contact a road; and
a base rubber layer on a rim side of the solid tire, the rim side being configured to contact a rim when the solid tire is mounted on a rim;
the base rubber layer having JIS-A hardness of 80 or higher, and
an RFID tag being embedded in the base rubber layer; wherein
a distance between the RFID tag and a side surface of the base rubber layer ranges from 0.5 mm to 10.0 mm,
the RFID tag is disposed at a position deviating from a rim slippage region defined within a range of −15% to +15% of a rim flange height with an apex of a rim flange as a center, and
the RFID tag is disposed radially inward of the rim slippage region.
2. The solid tire according to claim 1 , wherein the RFID tag is embedded substantially parallel to a side surface of the base rubber layer.
3. The solid tire according to claim 1 , wherein the RFID tag is disposed within a distance of 0.5 mm to 10.0 mm from a side surface of the base rubber layer that is on an outer side of a vehicle when mounted on the vehicle.
4. The solid tire according to claim 1 , wherein short fibers are blended in a rubber composition constituting the base rubber layer.
5. The solid tire according to claim 4 , wherein the short fibers contain 1 phr to 10 phr of vinylon fibers having a fiber length of 2 mm to 10 mm and a fiber diameter of 5 μm to 50 μm.
6. The solid tire according to claim 1 , wherein the RFID tag is coated with an adhesive.
7. The solid tire according to claim 1 , wherein the RFID tag is coated with polyphenylene sulfide resin.
8. The solid tire according to claim 1 , wherein the RFID tag is coated with ceramic.
9. The solid tire according to claim 1 , wherein the RFID tag is coated with a plurality of reinforcing fiber cords.
10. The solid tire according to claim 1 , wherein the RFID tag is coated with a reinforcing fabric.
11. A method for manufacturing the solid tire described in claim 1 , the method comprising:
when forming an unvulcanized tire by winding a rubber sheet into multiple layers,
inserting the RFID tag between layers of the rubber sheet in a middle of the winding of the multiple layers; and
vulcanizing the unvulcanized tire comprising the RFID tag in a mold to obtain the solid tire.
12. The method for manufacturing the solid tire according to claim 11 , comprising:
when winding the rubber sheet into the multiple layers,
calculating a winding position of the rubber sheet in a radial direction of the unvulcanized tire in accordance with a winding length and a thickness of the rubber sheet; and
inserting the RFID tag in accordance with the winding position.
13. A method for manufacturing the solid tire described in claim 1 , the method comprising:
forming an unvulcanized tire by winding a rubber sheet into multiple layers;
then attaching the RFID tag to a side surface of the unvulcanized tire;
further overlaying and attaching a coating layer made of unvulcanized rubber having a thickness of 0.5 mm to 10 mm on the RFID tag; and
then vulcanizing the unvulcanized tire comprising the RFID tag in a mold to obtain the solid tire.