PROCESSING OF PLASTICS AND NATURAL FIBER COMPOSITES Dr. Míriam García (on behalf of MONDIRECT) Pozzuoli, 20th-21st January 2005.

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Presentation transcript:

PROCESSING OF PLASTICS AND NATURAL FIBER COMPOSITES Dr. Míriam García (on behalf of MONDIRECT) Pozzuoli, 20th-21st January 2005

PROCESSING METHODS OF PLASTICS EXTRUSION INJECTION BLOW MOLDING CENTRIFUGATION GRILLING THERMOFORMING

PROCESSING METHODS OF REINFORCED PLASTICS MANUAL SHEETS SIMULTANEUS PROJECTION CENTRIFUGATION FILAMENT WINDING PRESSING PULTRUSION RESIN TRANSFER MOULDING (RTM) EXTRUSION INJECTION

EXTRUSION CONTINUOUS PROCESS MATERIAL FORCED TO FLOW THROUGH A GATE APPLYING PRESSURE AND HEAT. MATERIAL AT THE EXIT IS COLLECTED WITH A DRAG SYSTEM INJECTION THE MELTED MATERIAL IS INJECTED IN A MOULD AND SOLIDIFIED OBTENTION OF A FINISHED PRODUCT

INJECTION MOULDING MATERIAL CONTAINED IN A HOPPER PLASTIFICATION INJECTION SOLIDIFICATION IN A MOLD PARTS: INJECTION GROUP - HOPPER - DOSSIFICATION, PLASTIFICATION AND INJECTION SYSTEM MOULDING GROUP

REQUIRES HIGH T AND P HIGH PRECISION PRODUCTS SMOOTH SUERFACES HIGH PRODUCTION RATES INJECTION MOULDING

EXTRUSION SCREW GOES AROUND AND MAKES MATERIAL PASS THROUGH CYLINDER TILL THE GATE HIGH SHEAR STRESS AND COMPRESSION DUE TO RELATIVE MOVEMENT BETWEEN SCREW AND CYLINDER, HIGH MIXING EFFICIENCY

SINGLE SCREW EXTRUDER EXTRUSION TWIN SCREW EXTRUDER CO-ROTATING COUNTER-ROTATING

EXTRUSION DEPENDING ON THE GATE: TUBES PROFILES SHEETS AND FILMS EXTRUSION COATING SPECIAL EXTRUSIONS (MOBILE GATES)

NATURAL FIBER/POLYMER COMPOSITES WOOD/PLASTIC COMPOSITES INJECTION EXTRUSION

PROPOSED MATERIALS PRODUCTION: SHEETS - SANDWICH PANELS PROFILES COEXTRUDED MATERIAL EXTRUSION NATURAL FIBER/POLYMER COMPOSITES

SHEETS SHEETS FOR INTERIOR AND EXTERIOR BULK SHEETS SANDWICH PANELS

PROFILES PROFILES FOR EXTERIOR AND INTERIOR. MAXIMUM WIDTH: 500 mm BULK/HOLLOW

COEXTRUDED MATERIAL FOAM IN THE INTERIOR COMPOSITE IN THE EXTERIOR