Sabtu, 29 November 2014

The Tires Retreading Prosedure

Have you heard the tires vukanisir?

Have you heard the tires Retreading (Vukanisir) ?
Today many manufacturers sprung up around the tire retreading retreads dunia.Baik a small company to a solid teknologi.Kesemuanya retreading company is the impact of the new tire price increases, while the use of retread tires we could save about 50% expenditure -75%.
Do you know what tire retreading and how do I make it?
Retreading is a process in which the tire is worn refitted with new flowers to be used again. In fact, retread tires have been around since the existence itself. History of retreads in the beginning of World War II when natural resources are scarce and rationing done. Civilians skinning flower of vehicles damaged during the war and stuck it on the tires they have to be used again.
There are many methods used to memvulkanisir tires, but Vulkunisir Cold (Precure) and Heat Vulkunisir (Mould Cure) is the most commonly performed by retread plants throughout the world.
1) Cold Retreading | Vulkanisir (Precured)
As intended by this term, the rubber used here printed flowers and flower rubber vulcanized by the manufacturer. Factory vulkansir choose appropriate flowers in a strip or a full circle of various designs, widths and thicknesses. In Precure retreading process, a layer of rubber adhesive pads placed between the flower and the body of the tire. Tread width is applied to the prepared directly and evenly. Tire retread then moved into the space (curing chamber).
Curing is done at the time in the chamber is pressurized with heated air produced by electricity, steam or hot liquids such as oil. Agency prepared, with new rubber that is, placed in the room where the pressure and temperature, which was applied to the exact duration of a layer of vulcanized rubber pads and glue the flower onto the conveyor.
 
 
2) Hot Vulkanisir (Mould Cure)
Application and development on processing of hot cure retreading similar to the production of new tires.
By using various methods, it is not vulcanized rubber tread is applied to the crown of the body is wrapped (as well as in the case of retreading of lips-to-mouth, also the tires).

Furthermore, the body of the tire is prepared, made with the appropriate diameter with a material that is not vulcanized rubber, ready to be forwarded to the mold for retreading process.
By the time mold is closed and the body of the tire inflated to proper pressure, the expansion body of the tire in accordance with a material that is not cured on the mold, to form a flower design. Heating is then performed for a certain time to complete retread.
Retreading Industry

Radialisasi, quality improvement, a lack of understanding and consolidation are some issues to be faced by the retreading industry in the past 35 years have past. However, with advances in technology and economies of scale, the retread industry has reached a level of quality and sophistication that previously never existed in history, and today’s factories into larger retreading previous
Retreads, which is a business with good prospects in the past, also has a bright prospect. Agency for radial truck tires at this time is an investment, and the only way to get profits is to do a retread. Radialisasi, which has been underestimated vulkansir passenger vehicle market, proved to be a boon to the truck tire market vulkansir
Truck tires are vulcanized representing savings of $ 2 million dollars per year for owners of trucks and trucking companies in North America. Similarly, in China, there is a very bright prospects for the industry vulkanisirnya.

Association Tire Retread and Recycling of China have reported that in 2004, China produced 239 million tires and at the same time, producing 120 tires, the number expected to grow by 12%.
For most vehicle fleets, tires represent the third largest component in the operating budget after labor and fuel. Cost per km as low as possible is achieved from a good tire management program. This includes the use of retread tires good quality. Retreading is the choice of replacement tires for trucks and fleet owners who purchase more than 18 million tires retreaded each year in the United States and China.
Retread tires is not only cost effective but also reliable and safe. Retread tires used by the owner of the truck with the schedule time of delivery is assured, used on commercial aircraft and military jets and most school bus operators. Environmentally friendly tire retreading. Tyres are basically petrochemical products. To create a new truck tires, it takes 22 gallons of oil. Most of the oil stored in the body of the tire, which are reused in the retreading process. As a result, only 7 gallons of oil needed to produce a retread tire.
The retread tire makers, such as trucking companies, has made a significant consolidation. Today, the makers of the most successful tire retreading are those with high quality products, which provide the best possible return with the existence of competition in the industry vulkansir. The truck owners can expect to see continuous improvement in terms of quality, durability and reliability, at a large tire supplier vulkansir millions of dollars invested annually in research and development. Indeed, the future of the industry vulkansir dependent on the same principle that has enabled the existing retreading plant to remain in business. Continuous attention to quality control, cost of operation, and maintenance of equipment is the most important factor of any successful factory.

 Retreading Process

Initial Inspection

 

Each tyre received in a retread plant is subjected to a rigorous visual inspection. Inspectors are assisted by the use of non-destructive sophisticated inspection equipment.
We also purchase a new machine (Inspection Spreader).This Inspection Spreader designed to detect pinholes, nail holes, cuts, cracks, porosity,etc,Automatic tyre rotation stop when penetration detected with sparks.

Buffing

 

The tyre’s old tread is mechanically removed on high speed buffers. Today’s buffers are extremely accurate and will remove the proper amount of old rubber while turning the tyre to an exact specified diameter and radius.

Skiving & Repairing

 

With advances in state-of-the-art repair materials and repair methods, many of these tyres can be routinely repaired and in most cases can be retreaded when the original tread is worn off. The repair station is where any surface injury is treated using effective material and tools for grinding and patching.

Cementing & Filling

 

Even in small injuries it is critical that the injury is cleaned and filled. If this is not done, severe rust, separation and steel cable looseness could take tyre out of service. The injury should be inspected, and then cleaned out with a carbide cutter. After cementing the injury, a vulcanizing rubber stem should be applied to “fill” the injury. This would create a permanent repair that maximizes tyre life.

Building

 

In the pre-cure system, the tread rubber has already been vulcanized with the new tread pattern design. The buffed tyre needs a thin layer of cushion gum to be wrapped around its crown area. The pre-cured tread rubber is then applied with the building machine. This is called the building process.

Enveloping, Rim Mounting & Double Envelope System

  

a) The built tyres are then mounted with envelops and rims to prepare them for curing.
b) For enveloping, tyres are first fitted an outer envelope at the envelope-mounting table before the inner envelope is fitted into them. The enveloped tyres are then vacuumed out for preparation prior to curing. Modern plants have their casings hoisted by monorail systems.

Curing by Chamber (Precure)


 

The Precure Tread system is a process by which a tread pattern is fully cured or vulcanized into the tread by using a press. The tread is then vulcanized onto a tire casing using a bonding layer of uncured natural rubber. The tyre is vulcanized with heat, time and pressure in a curing chamber that bonds the tread to the casing. This thin layer called precure cushion or bonding gum. Cold retreading was then a term used to describe a process in which the final curing of retread is done at temperature lower than 115c.

Hot Process (Hotcure)

http://vulkanisir-blog.blogspot.com/2014/11/the-tires-retreading-prosedure.html
http://vulkanisir-blog.blogspot.com/2014/11/the-tires-retreading-prosedure.html
This system is similar to the technology of new tyre manufacturing.
Hot retreading is the term used to describe the retreading process in which the curing of retread is done at a temperature of above 140c. It employs a steel or aluminum mold with a tread design cast or machined into it.

Final Inspection (Presure Test) & Painting


http://vulkanisir-blog.blogspot.com/2014/11/the-tires-retreading-prosedure.html

  • Tyre inflation pre-set at 2, 4 & 8 bar (max) for a better QC inspection.
  • Enclosed by steel cage as safety protection.
  • Testing cycle ended automatically to reduce supervision work.
  • Well lighted within the cage for better visual inspection.
The retreaded tyre is subjected to a final inspection. This inspection insures that only tyres that meet industry quality standards are allowed to leave the retread plant.
All retreaded tyres are encouraged to be returned with the sidewalls painted using a light coat of black tyre paint.

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