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PLASTIC PROCESSING TECHNIQUE - PDS

PLASTIC PROCESSING TECHNIQUE PLASTIC PROCESSING can be defined as the process of converting the plastics raw material into semi-finished products. Ex: Buckets, Automobile Parts, Crates, Tanks, Pipes, Bottles, Carry bags, Ropes, Profiles etc. Classification of PROCESSING methods 1. Primary PROCESSING Methods: injection , extrusion , Blow, Compression and transfer moulding. 2. Secondary PROCESSING Methods: Roto, Thermoforming, Coating, Casting, Fabrication and Calendaring etc. 3. Tertiary PROCESSING Methods: Cutting, Drilling, Welding and Bending etc. Fundamentals of PROCESSING Processability: Processability is generally the ease or difficulty with which a PLASTIC can be handled during its fabrication into film, moulded products, pipe, profile etc.

1. Extrusion Blow moulding 2. Injection Blow moulding 3. Stretch Blow moulding 1. Extrusion Blow moulding: In extrusion blow molding (EBM), plastic is melted and extruded into a hollow tube (a parison). This parison is then captured by closing it into a cooled metal mold. Air is then blown into the parison, inflating

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