Hosokawa Alpine, one of the leading suppliers in the field of film extrusion, has developed a high-efficiency cooling system for blown film extrusion. The system, developed from scratch, consists of the Alpine CRX cooling ring series for outer cooling and the Alpine HT cooling tower for inner cooling. The latest generation cooling system will make its debut appearance at the K 2019 trade fair.
The cooling ring is a key factor in energy-efficient film production. “For the Alpine CRX series, we opted for a low-counterpressure system. This allows us to make more efficient use of the available cooling capacity and increase line throughput,” says Dr. Holger Niemeier, Managing Director and Head of Film Technology at Hosokawa Alpine. The base body is fully thermally insulated and also contributes to increased energy efficiency. In addition, the insulation avoids condensation formation on the outer surface. The high-performance cooling ring is also characterised by optimised air distribution, resulting in improved film tolerance. Since the Alpine CRX only has a single cooling air supply line, it can be easily integrated in the system.
The efficient inner cooling is provided by the Alpine HT cooling tower. The new nozzle geometry of the cooling tower reduces the counter-pressure, thus ensuring optimum use of the available cooling capacity. The unique monomer collection system for paraffin retention is also employed. The system developed by Hosokawa Alpine prevents paraffin splashes on the film bubble, which substantially increases cooling tower cleaning intervals. The high volumetric flow of the Alpine HT cooling tower guarantees extremely high line output.
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