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

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

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

2 PROCESSING METHODS OF PLASTICS EXTRUSION INJECTION BLOW MOLDING CENTRIFUGATION GRILLING THERMOFORMING

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

4 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

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

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

7 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

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

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

10 NATURAL FIBER/POLYMER COMPOSITES WOOD/PLASTIC COMPOSITES INJECTION EXTRUSION

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

12 SHEETS SHEETS FOR INTERIOR AND EXTERIOR BULK SHEETS SANDWICH PANELS

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

14 COEXTRUDED MATERIAL FOAM IN THE INTERIOR COMPOSITE IN THE EXTERIOR


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