How to repair a tire step by step

How to repair a tire step by step

In our last post we talked about How to repair a tire. In this one we will show you one by one how to repair a tire in three methods. So let’s see how to repair a tire step by step.

1. Tire repair with PRP patch

This repair method is one of the most recommended since the patch has a stem that is inserted into the puncture and a base that seals the adjacent inner surface of the tire, all reinforced with a specific adhesive.

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Step by step: The process to follow to repair a puncture with this type of patch is as follows:

  1. Choose the «mushroom» type patch that best fits the diameter of the puncture.

  2. Enlarge the puncture diameter using a drill and a drill bit that fits the selected patch.

  3. Sand and brush the inner area of the tire where the patch is to be placed. To do this, use a corundum or tungsten carbide disc. If the customer has used the foam kit mentioned above, it should remove any product residue.

  4. Blow the surface and degrease the area with a specific cleaner that does not attack the rubber.

  5. Apply the adhesion product on the area where the patch is to be applied, taking care to cover an area slightly larger than the diameter of the base of the patch.

  6. From the inner side of the tire, insert the stem of the patch over the hole.

  7. Pull the end of the stem protruding from the outside of the tire.

8. Press the base of the patch making sure that there are no folds, air pockets or open areas at the edge of the patch. To do this, use a pressure roller or similar tool.

9. Cut off the excess part of the stem that protrudes from the outside of the tire.

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2. Tire repair with vulcanized patch step by step

repair a tire how to do step by step

This is another system that offers the possibility of repairing punctures durably. The patches available on the market are hardened using a cold vulcanization process (self-vulcanizing) or thermal contribution. Both systems can be combined to repair certain damages.

A generic process for this type of tire repair is shown below:

1. Sand the area where the patch is to be placed on the inner side (between 100 mm and 150 mm around the patch) and open and bevel the edges of the damage on the outer side using rotary cutters and abrasive discs. With both actions, the contact surface is increased, and durability is guaranteed. If pre-vulcanized rubber inserts are used, the chamfering process is greatly simplified.

2. Brush the area to remove the field rubber residues.

3. Clean and degrease the working surface.

4. Apply the bonding accelerator on the sanded area and the pretreatment primer on the beveled surface to be filled with rubber compound.

5. Choose the most suitable type of patch according to the extent of damage and the chosen curing process (cold or hot).

6. Place the patch on the inner side to cover the sanded area centered on the damage.

7. Press the patch with a pressure roller to eliminate air pockets and ensure maximum possible contact.

8. Apply the vulcanizing rubber compound over the beveled area and press it with the pressure roller to properly seal the existing joint between tire and patch.

9. Fill the rest of the damage with the vulcanizing rubber compound, shape it to equalize the surface, press it with the roller, and apply protective film (only for hot vulcanization).

10. If hot vulcanizing patches have been used, place the tire on the vulcanizing equipment and position the hot plate on the patch in such a way as to generate uniform pressure.

At this point, wait for the patch to vulcanize and turn off the iron without removing the pressure until the assembly cools down.

11. Apply sealant adhesive along the entire perimeter of the patch to seal the joint.

12. Even out the surface of the tire by sanding the area.

13. Regroove the pattern on the outside of the tire if necessary.

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3. Tire Repair: Retreading and Regrooving

Retreading allows the tire tread to be restored through hot or cold vulcanization. On the other hand, regrooving enables the tire tread to be reproduced when the tire is worn or has been repaired.

Both operations are almost exclusive to heavy commercial vehicles. They are performed to increase tire performance and reduce the high cost of tire replacement.

Article based on Ruta 401 source.

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