PROCESSING OF PLASTICS AND NATURAL FIBER

COMPOSITES

Dr. Míriam García

(on behalf of MONDIRECT)

Pozzuoli, 20th-21st January 2005Pozzuoli, 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

INJECTIONTHE 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 COMPOSITESINJECTION

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