23 - Curriculum Development Centre, Kalamassery

UNIT -IIIAutomobile inner tubes – function –different steps involved in the production of inner tubes –compounding formulation-tube curing –inspection and packagingOTR, ADV tyres, tractor tyre, earth mover tyre, aeroplane tyre – peculiarities of compound designand its importanceUNIT –IVCycle tyre and tubes-Cycle tyre components and their production – cycle tyre building – collapsible drum methodand mono band method – curing of cycle tyre – BOM presses – cycle tube – methods of productionmould curing and mandrel curing. Typical formulation for cycle tyre and tube componentsProduction of two wheeler and auto tyres, solid tyre, comparison with pneumatic tyre – advantagesand disadvantages.Re-treading MaterialsIntroduction – necessity and importance of re-treading – pre-operationsConventional and pre-cured tread. Different sizes of tread – dimensionsRe-treading process – hot and cold – machinery used for re-treadingTypical compounds for tread in hot and cold processUNIT –VTyre testing –Non-destructive and destructive testing of tyre –high way testingEndurance tests, plunger test-tube testingTesting of cycle tyre and tube – cord strength, casing strength (carcass strength), joint adhesionstrength etc.References:1. Rubber Technology and manufacturing by C.M.Blow2. Vanderbuilt Rubber Hand Book –Vander built Rubber Company3. Tyre Technology –F.J.Kovac4. Rubber Technology and Manufacturing – Published by SBP5. IS specification for cycle tyre122