The precise definition of Tyre-Retreading is “The method of giving the tyre a new life”. The fundamental objective of the retreading process is giving a new shape to the tyres which are have been heavily damaged but had performed phenomenally in the past. Generally, Retreaded tyres are nowhere inferior to the brand-new tyres.
What is the need for Tyre Retreading?
- Tyre-retreading literally gives an extended life to the tyres which were exceptionally good. The process gives an option of disposing of the tyres which have minor damages but given an extremely good performance.
- Opting tyre-retreading could save a significant amount of money to the customers. Instead of buying a brand new one the customers could take the old tyres to the retreads, as these are very much equal to brand new tyres.
- The tyre-retreading can be performed more than once according to the range and performance of the tyre, which would postpone the huge investment in buying a new one.
Types of Retreading:
There are TWO specific types or techniques of retreading, which are as follows:
This technique involves vulcanizing the tyre in a mould with an extreme temperature of 150 degree Celsius. This technique is opted to get the required shape. The advantage of Hot Retreading is it is suitable for all types of tyres.
The technique is processed without using a mould at a temperature of 90-110 degree Celsius. A tyre-liner is used instead of a mould. This technique is less expensive as high costly moulds are not involved.
What are the steps involved in the Process of Tyre-Retreading?
Retreading is not a simple process, it involves various steps that could be performed only by a professional mechanic, which are as follows:
Step 1: Tyre Inspection
Not all the tyres could be Retreaded, the tyres must be inspected before making the conclusion of its suitability to retreading. It will be checked by the inspector at the beginning and it will go through a Laser Digital Shearography test, which will aid the mechanic to discover the intricate damaged portions. If it is heavily damaged, Retreading cannot be processed. The inspection step allows the mechanic to understand the tyre’s state.
Step 2: Tyre Buffing
Once the tyre is in an acceptable state, it will be taken to the next immediate step known as tyre Buffing. This process includes shaving or chopping off some portions of the tyre in order to minimize the problems that occur due to Tread-flex. It removes the tread blocks which forms in the area between the rubber and tread grooves. This process is performed with the help of computer-controlled machines by the trained mechanics.
Step 3: Repairing
This stage involves foreseeing the possible damages that could occur to the tyre and treating them in advance. This process also includes detecting minute holes with the help of high voltage electricity passing through the tyre. These activities allow the casing to regain its strength.
Step 4: Building
After the completion of all the above steps, a new material is attached to the casing with the help of computer-controlled machines. Taking aid from automatic machines is chosen primarily to avoid the disturbances or miscalculations that generally occur in the manual process.
Step 5: Curing
This step included taking the built-tyre to a curing press, where it undergoes heating to make sure that the rubber is rightly vulcanized.
Step 6: Final Inspections
This step is the combination of several inspections to re-verify whether the process went well without any disruption. The benefit of this process is certain intricate imperfections can be spotted and rectified. The various tests are as follows:
- visual and tactile inspection,
- inflation test etc.
Finally, the Retreaded tyre goes through the same inspection process as it had gone initially, it will be verified by Shearography test where some unnoticeable damages can be discovered.
What are the Advantages and Disadvantages of Tyre-Retreading?
The advantages are as follows:
- All kinds of tyres can be taken for retreading process i.e., from taxis to truck tyres.
- These are environmentally friendly as they reduce carbon-dioxide emission, unlike the newly manufactured tyres.
- These tyres are cost-effective in comparison with new ones. It allows the customers can save quite a good amount of money.
The Demerits of Tyre-Retreading are as follows:
- If the retreading activity has performed without proper inspection, the repercussions could be severe.
- The Retreaded tyres are facing tough competition with the arrival of Budget tyres as they are brand new and cheaper than the Retreaded tyres.