ARJUN C2ND SEM MBA

WELCOME

MADRAS RUBBER FACTORY(MRF)

MRF•MRF is India’s no.1 tire manufacturing company.•Started in the year 1946 by K. M Maaman Mappillai as a small toy balloon unit.•MD- Arun Maaman•Head Quarter- Chennai, India•In 1960 ventured manufacturing tire.•Sister concern of Malayala Manorama.

MRF ProductTire

Manufactured various tires to passengers cars, two wheelers, trucks, buses, tractors, light commercial vehicles and off the road tires.

Conveyor beltsit manufactures conveyor belt with wide range

of grades. It has a range of application in industries like mining, Ports, thermal power plants, cement plant, steel etc.

Continues…ToysSports GoodsPaints & Coats

Tire Manufacturing Process

Tire Manufacturing Process1)Compound & Mixing2)Component preparation3)Tire building4)Curing5)Tire inspection

1.COMPOUNDING&MIXING•Compounding is the operation of bringing together natural rubber process oil, carbon black, accelerator and other additives, each of which contributes certain properties to which is called ‘ a compound’..•To obtain a homogeneous mixture, they are mixed at a high temperatures in a massive mixer.•Output of compounding and mixing: Cooled Rubber Slabs

2.COMPONENT PREPARATIONComponents preparation falls into three classes

process Out put

1.Extrusion-Process of applying heat and pressure on the compound and additional mixing of the compound.

Tread; improve wear and traction in any environment

Sidewall; provide good abrasion and environmental resistance for the sides of tires

2.calendaring-process of squeezing the compound into a thin sheet, fabric calendars produce an upper and lower rubber sheet with a layer of fabric in between. Steel calendars produce the same with steel cords. Calendars utilize downstream equipment for shearing and slicing calendared components.

Belt package; Give the tire strength while allowing it to remain flexible in its structureBody ply; Provide tire structure and strengthInner liner; Assure that tire will hold high –pressure inside without the air gradually diffusing through

3.Bread building-shaped like a hoop, it has coated high–tensile wire forming its backbone .The strands are aligned into a ribbon coated with rubber adhesion

Bead ; provide the mechanical strength to the wheel.

3.TIRE BUILDINGThe tire building machine pre-shapes radial tires into a form very close to their final dimensions to make sure the many components are in their proper positions before the tire goes into the mold.

4.CURINGThe curing press is where tires attain their final shapes and tread pattern. Hot molds like giant waffle irons shape and vulcanize the tire. The molds are then engraved with the tread pattern and sidewall marking.

5.TIRE INSPECTIONProfessional visual inspectors and automated inspection machine detect the slightest defect on the final product. Some tires are sampled from the production line and x-rayed to detect any hidden weaknesses or internal failures.

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