Polystyrene Foam Sheet Extrusion Line
With Outputs up to 700 kg/h
Film and sheet extrusion machinery supplier Macro Engineering & Technology Inc., Mississauga, Ontario, Canada has introduced a new high-output polystyrene (PS) foam sheet extrusion line with outputs up to 700 kg/h.
The key feature of this line is a newly designed innovative cooling screw that guarantees both efficient cooling of the melt and highly uniform melt temperature distribution in the secondary extruder. This not only allows extrusion to occur at elevated outputs but also creates advantageous properties within the foam structure, such as an increased proportion of closed-cells, improving the overall strength of the foamed sheet.
The die is designed so die lip adjustments can be performed without shutting down the line, saving costs on materials and labor. The line is equipped with a loss-in-weight feeding system that regulates an accurate blending ratio. The gas injection system can work with a range of physical blowing agents, and more than one agent can be injected simultaneously, if needed.
The system uses tandem extruders to produce foamed PS sheet between 1.2 and 5.0 mm thick, and up to 1,270 mm wide. It is completed with two turret winders that wind rolls up to 2 m in diameter; however, Macro also provides the option of slitting the tube once to create one large sheet that can be wound on a single winder, simplifying the startup and roll transfer processes and reducing operator requirements on these processes.
Macro Engineering & Technology Inc.
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