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