Tires

1. 1.Banbury Blending
 In this process the natural rubber and synthetic rubber is
blended with some specific chemicals to get the rubber in
the used form.
 Specific amount of carbon is added at the initiation of this
process.

2. 2.Milling
 In this process the shaping of rubber takes place as the
rubber sheet comes out from banbury mixer is not that
perfect.
 This process takes place more than 2 or 3 times for the
same rubber lot , just to ensure the regularity of the rubber
sheet.

3. 3.Extruding/Calendering
 Extruding process is very important process as it converts the thick and
heavy rubber sheets into thin rubber sheets.
 Many of the tire components are made by this process such as tread ,
inner liner etc.
 This process is done by several different machines such as Triplex extruder
, Doublex extruder etc.
 Calenering is the process similar to sandwiching , as it sandwich or
calender the thin and sharp wires between the two thin layers of rubber
sheet.
 This process produces the steel belt which is required in the radial car
tires.

4. 4.Curing
It is process of vulcanization of rubber.
It holds two main parts upper mold &lower mold
 Mainly there are
• Sulfur system
• Peroxides
• Urethane cross linkers
• Mettalic oxides
• Acetoxysilane

5. RADIAL TIRES
• Radial tires are generally known as nylon or off road tires.
 First layer is of rubber sheet.
 Second sheet of steel.
 Third layer of rubber.
 Fourth layer is of nylon
 Final layer of hard rubber.

6. FINAL INSPECTION
• Final inspection is done on various points
 Quality standards
 Proper grip
 Air pressure
 Proper design