Does Tire RFID Tag Implantation Affect Tire Safety Performance?

There are two methods for implanting RFID tags into tires, which are implanted from the tire molding process and implanted on the surface of the tire blank. The specific implantation process of tire rfid tag is briefly described below.

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1.1 Implantation during tire building

The implantation of RFID electronic tags into tires can be completed in the tire building process, that is, the production process of tire green tires. The method of implanting is to stick the electronic label on the semi-finished part of the tire with a film. The semi-finished part can be a belt layer, a ply layer, a side rubber or an inner liner. The film used for pasting must be the same as the material of the corresponding semi-finished part.

On the forming drum, after the carcass ply is finished, the electronic label is pasted on the surface of the ply with a film. After the carcass is unpacked, the electronic tag is sealed in the sidewall. The method of implanting all-steel tires and semi-steel tires is basically the same.

 

1.2 Green tire surface implantation

In addition to implanting the electronic tag during the tire molding process, it can also be implanted in the tire blank after the molding is completed. In this method, an electronic label is attached to the outer surface of the tire blank with a film. An inner liner film must be used for the surface of the inner liner, and a side rubber must be used for the surface of the tire. Compared with implantation during the molding process, the read distance of the label will be shortened by this method. The reason is that the rubber near the mold is more fluid than the internal rubber when the tire is vulcanized. Signal transmission.

 

2 Implantation position

The tire is composed of a variety of semi-finished parts. The placement of the electronic tag in the tire is very important for reading and writing the chip information after the tire is implanted. The location of the implant should not only help the reliability of the electronic tag, but also minimize the impact on the tire quality. Therefore, the choice of implant location is a key issue for the application of RFID tags in the tire quality control process.

The method of implanting between the filler and the sidewall rubber can meet the performance requirements. This method is completed during the carcass lamination process. After the carcass ply is stitched and pressed, an electronic label is pasted at the position marked by the laser positioning cursor, and then the subsequent process is continued.

 

3 Reliability testing of electronic label packaging

Through the bubble detection, X-ray detection, dynamic balance uniformity detection and durability performance test, the tires with RFID tags have been tested to verify the anti-buckling, anti-interference and high temperature resistance of the tags and whether they will affect the tire performance.

 

3.1 Bubble detection

In general, if foreign matter is stored in the tire and used for a long time, the foreign matter may detach from the tire rubber, and the gap gradually increases, which will eventually cause the tire to be scrapped. In this regard, we performed bubble detection on RFID tires produced in batches and after road tests. The results showed that no bubble was found at the location where the RFID tag was implanted. Therefore, the RFID electronic tag can be well combined with the tire without causing air bubbles inside the tire.

 

3.2 X-ray inspection

With the help of a tire X-ray inspection device, the structure of an implanted RFID electronic tag can be inspected. Since the tire manufacturing process is subject to high temperature and high pressure, RFID tags may be damaged at this stage, so that they cannot communicate with the outside world. X-ray inspection can clearly see the position of the RFID tag in the tire. The test results show that for newly produced RFID tires, the RFID tag in the middle of the sidewall has a longer reading distance, because the tire is thinner in this area and has less interference with RF signals. The reading distance of the RFID tag on the side of the tire near the sub-portion and the shoulder is short. For tires that have already completed the road test, the RFID electronic tags in the middle of the sidewall and the shoulder cannot be read, but they can be read near the sub-portion. By dissecting the test tire after the road test, it can be found that the antenna of the RFID electronic tag and the chip are welded. The reason is that the middle part of the tire tire side is greatly deformed, which damages the antenna structure of the electronic tag and affects the transmission of the force signal.

 

3.3 Dynamic balance uniformity detection

Parameters such as the dynamic balance of the tire directly affect the smoothness and safety of the tire. With the help of dynamic balance uniformity testing equipment, we test tires with RFID tags. The results show that the actual weight of the RFID tag is only 0.02g, and it will not affect the uniformity of the dynamic balance of the tire after it is implanted.

 

3.4 Endurance performance test and road test

In order to ensure the safety of the test, the indoor mileage test should be performed before the actual road test of the RFID test tire. The results of conventional durability tests show that the RFID test tires will not be affected by the implanted RFID tags during operation. Road tests can only be performed after the indoor tire durability test has passed. The road test results show that the tire runs in various actual road conditions, and the RFID electronic tag will not affect the quality of the tire. At the same time, it can ensure that the data stored in the chip can be read normally after the tire is used, and the full tire Life cycle tracking management.

 

4 Conclusion

The optimal implantation position and implantation method of the electronic tag were verified through experiments. The reliability test of the electronic tag was mainly studied, mainly through bubbles, X-rays, uniformity of dynamic balance, durability testing, and testing of the test tire. Tests and other tests are carried out, and the test results can be concluded that the implantation of RFID tags in the tire will not affect the quality and safety performance of the tire.