23 - Curriculum Development Centre, Kalamassery

UNIT -V5.0 Understand the testing equipment5.1 Explain the different parts of Mooney viscometer, specification of rotor and its speed5.2 Explain the types of rheometers (ODR, MDR)5.3 Explain the working parts and features of Tensile testing machine5.4 Explain the parts of Dunlop tripsometer5.5 Explain the working of different parts of Goodrich flexometer5.6 Describe different parts of impact tester (Charpy and Izod)5.7 Compare the Working and different parts of Din and Dupont abradersCONTENT DETAILSUNIT-IMixing equipments –batch and continuous mixers-open two roll mill-types –machine details ,rollsize, capacity, drive system, friction ratio ,temperature control and safety devices , material forconstruction accessories , advantages and limitations –Internal mixers, types –banbury andintermix-important parts ,working principle,capacity,drive system ,Temperature control,pressurecontrol-fill factor and its significance,comparison with open two roll milDesign elements – rotor and chamber design , ram and door configurations , rotor and temperaturecontrolMixing variables – feed rate ,discharge ,rotor speed ,fill factor ram pressure, batch temperature andmixing sequences.Continuous mixers – types of blenders single screw continuous mixers – double R mixer, MVXmixer – Farrell continuous mixer and transfer mixer co-rotating disc type mixers.Kneaders and Brabender plasticorderDevelopment in mixing technologyUNIT –IIExtruders – types – screw and ram extruder ,hot feed and cold feed extruder – cross head (T-headextruder) ,dual extruders, vented extruders, twin-screw extruders – extrusion technology.Important parts of extruders – screw, barrel. Feed hopper, die, head, screen pack, adapter, breakerplate ,temperature control, compression ratio, size and capacity, L/D ratio of different extruders, drivesystem, comparison of rubber and plastic extruders.-Types of extruders and their functions – strainer ,vented typed-Design factors – screw and barrel design for controlling compression ratio,temperaturecontrol and Methods of increasing the extrusion pressure.Calendars- Calendars – various configurations3 roll, 4 roll, vertical, inverted L, Z etc-CalendaringTechnology-Parts and their specifications-Temperature control for rolls-Roll ,deflection and methodof correction -Roll cambering , roll bending ,roll crossing etc.UNIT-IIIMoulding machinesCompression moulding – Hydraulic press – types of hydraulic presses, principle of hydraulic press,Pascal’s law , working ,sketches , heating elements – calculation of pressure –Temperature control.Machine used for continuous vulcanization.Injection Moulding-Injection moulding, introduction, types of injection units- Ram and screw typeinjection moulding machine. Different types of moulds – positive and semi-positive mould ,simpleflash mould – sketches design of different parts sprue , runners , different types of gate and theirdesign.Mould clamping unit – toggle and hydraulic mechanism .Ejection mechanism. - Example ofproducts manufactured by injection moulding- pre-plasticized ram and screw injections mouldingmachines-Blow moulding machine –different typesTransfer moulding machine – moulds – process comparison of compression and transfer mouldingtrouble shooting in transfer moulding.- Examples of products manufactured by transfer moulding.153