Our PLASTICWOOD extrusion lines allow the production of low density (0.5 – 0.7 gr/cm3) semifoamed PVC board and Wood Plastic Composite (WPC) board.
A “real synthetic wood” item, that can be furtherly finished (see our Finishing Machine), having in addition to Natural Wood the main features of the thermoplastic materials, such as:
– insensibility to the atmospheric agents,
– UV rays resistance,
– fire resistance,
– termite proof,
– mass colouring.
The extrusion of semifoamed PVC or WPC boards, starts from a PVC compound or from a WPC mixture with Chemical Foaming Agents perfectly mixed inside a turbo-mixer.
This mixture enters a twin-screw extruder and goes through a flat T-die, specially studied to grant a perfect homogeneous foaming along the total thickness and width of the board.
After the T-die, the PLASTICWOOD extrusion process is divided into two systems:
- PLASTICWOOD CALENDERING system (FREEFOAM):
the board at the exit of the T-die enters a 4 rolls pre-cooling unit and a 3-rolls vertical calender.
After the calender a cooling-rolls system is stabilizing the foamed board, which is consequently cut at a pre-defined length by a circular saw. The main features of the semifoamed PVC and WPC board extruded with the CALENDERING system, are:
- high quality superficial aspect for printing & finishing
- thicknesses from 3 mm to 25 mm
These characteristics makes the boards extruded by CALENDERING system very suitable for advertising applications.
- PLASTICWOOD CALIBRATING system (CELUKA):
after the T-die the board enters a calibrating and cooling unit which, by means of cool water and vaccum, calibrates the board up to 30 mm thicknesses.
After the calibrating unit, an annealing-oven is stabilizing the foamed board, which is consequently cut at a pre-defined length by a circular saw.The main features of the semifoamed PVC and WPC board extruded with the CALIBRATING system, are:
- high impact superficial strength
- thicknesses from 3 mm to 30 mm