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Copy of The Life Cycle of Tires
Transcript of Copy of The Life Cycle of Tires
What is needed to produce a tire?
The main raw material
Sulfur and other Chemicals
Makes rubber increase in friction
Top producers of Raw Rubber
Thailand : 29.6%
Indonesia : 27.3%
Malaysia : 8.8%
India : 7.9%
The making of natural rubber
Processing the raw rubber
Gathering the liquid rubber
Liquid rubber is extracted from the bark of a rubber tree, Hevea Brasiliensis. The tree is punctured in the fashion of a spiral, leading to a bowl at the very end. The tree leaks a gallon of liquid rubber after 6 hours.
The liquid rubber is hardened by mixing its liquid state with formic acid, flattening the dough-like rubber, then rinsing the acid and hanging it to dry. The more it dries, the more it expands and hardens.
The flat rubber sheets are cleaned with water and dried once again. The sheets are smoked for 15 days to preserve the sheets to avoid mold. After this, they are pressed into cubes and are transported to companies who manufacture it into tires.
Raw Rubber Distribution
How to recycle tires
The tire is designed by engineers in the tire company, making sure it can withstand everyday use. The tire needs different kinds of rubber for the different parts of the tire, which are the tread, beads, and the body with side walls. With the help of computer programs, the tire is designed and ready for manufacturing.
The Manufacturing Process
After the manufacturing stage, the finished tires are tested and observed, and are distributed throughout the world through cargo ships, trucks, and trains, ready for its longest part of its journey, the usage of the tire.
Step 1: The mixing of the raw materials
Rubber, carbon black, sulfur, and other materials are mixed to form the rubber needed to make tires. Proper amounts of the materials are maintained by computers.
Step 2: Through rolling mills, the rubber compound is transformed into thick sheets.
Step 3: The making of the Body, beads, and tread
The rubber is used to layer cloth-like fabric to form plies, which are used to make the body of the tire.
The beads of the tire are wire bundles which are wrapped together, formed into rings, and then coated with rubber.
The tire tread and side walls are made by getting the rubber compound and putting it in an extruder. This machine further mixes and heats the batch and forces it out of a die to form a layer of rubber. The sidewall is covered with a plastic sheet and rolled, and the tread are sliced into strips and loaded into books, which are large flat metal cases.
Step 4: The parts are sent to the tire-building machine and are built
The parts of the tire are positioned around the tire-building machine, sticking layers after layers, and squeezing it all together. This tire is called a green-tire, which are untreated tires.
Step 5: The curing of the tire
The curing of the tire consist of placing the green tire into a large mold, and having a flexible balloon called the bladder to force it into the mold. While the tire is in the mold, it is heated up to 280 degrees. The tire is cured for different amount of times to form different kinds of tires.
Tires provide friction for the wheel
This can be any wheel, typically a car's
Without friction, there is no traction.
Without traction, there is no movement
And without movement, the car is useless.
Also, it would be impossible for the car to brake without sliding if it did not have friction.
Tires usually last for 80,000 miles
This stage uses the most energy
Objects that can be made from recycled tires
Tires were tossed in landfills until 2006
They do not decompose because of the vulcanized rubber that it is made up of
The metals in the tire can puncture what separates the land fill with the ground, leaking the oily residue into the soil.
Fire in a tire pile produces acrid black smoke that releases toxic pollution to the air we breath
100% of End-of-life tires are recyclable
Railroad track cross ties
Crumbs or Powder
Material for road surfaces
Synthetic ground coverings or composites
The rubber from tires can be recovered
Cost of recovered rubber is half the cost of raw and synthetic rubber
Stronger than raw and synthetic rubber
Recovered rubber uses less energy in production than in the raw materials
Of course the main benefit is getting rid of tire piles to make our environment safer.
Outcome from one Scrap tire
70% Recoverable Rubber
3% Carbon Fiber
12% Extraneous Material (Fillers)
Remove the steel banding and shred the rubber into granules which can be used for
Asphalt and Rubber surfaces
Further more breaking up the granules into recovered rubber
Coe, Nicole. "How to Melt Rubber Tires." eHow. Demand Media, n.d. Web. 20 Oct. 2014.
"Crumb Rubber." Scrap Tire News. Recycling Research Institute, n.d. Web. 15 Oct. 2014.
Discovery Channel. How It's Made - Natural Rubber. YouTube. Google, n.d. Web. 12 Oct. 2014.
Freudenrich, Craig. "How Rubber Works." HowStuffWorks. InfoSpace LCC, n.d. Web. 12 Oct. 2014.
"Life-Cycle Greenhouse Gas Emission Factors for Scrap Tires." Environmental Protection Agency. N.p.,
n.d. Web. 12 Oct. 2014. <http://www.epa.gov/climatechange/wycd/waste/downloads/
"Life Cycle of Tires Analysis." Michelin. Michelin North America Inc, n.d. Web. 12 Oct. 2014.
"Tire." Made How. N.p., n.d. Web. 12 Oct. 2014. <http://www.madehow.com/Volume-1/Tire.html>.
"Tire Recycling." RubbeRecycle. Rubber Recycle, n.d. Web. 12 Oct. 2014.
Step 1: Shred the rubber granules even further
Step 2: Seperate the metal parts and non-rubber materials with a centrifuge.
Step 3: Fill one-third of your heating chamber with heavy oils
Step 4: Put the shredded rubber pieces and heat at 750-1000 degrees Fahrenheit.
Step 5: Collect the melted rubber resting above the oil
Motor Vehicle Parts
This stage is the most unfriendly towards the environment
Oils extracted used for fuel
Emits less NOx than coal fuels