machinery | Blown film dies and equipment Right: The


Navigator 9000 system, from Contrex,


exercises close control over its Atlantis 23T cooling ring


are available in diameters of 160-710mm for the production of mono-layer through 11-layer co-extrusion blown films. Other benefits include: reduced raw


material loss during material changeo- vers; high output rates, due to low operating pressure in the die head; and a self-cleaning design, which maximises uptime due to extended intervals between die cleaning.


Ring the changes At last year’s K2016 show, Contrex – which is owned by Moretto of Italy – showcased a number of its latest innovations, including the Atlantis 23T cooling ring. The company says that the device is an innovative, high-efficiency automatic multi-flow air ring with sectoral thermal modulation for accurate and auto- matic thickness adjustment. Together, these factors help to reduce the time needed for production start-up. The system makes it possible to reduce thickness


tolerances along the entire circumference of the bubble and compensate the channeling of the melt flows and possible misalignment. It uses three cooling flows with automatic thickness adjustment, and controls the stretching in combination with the thermal factor. Addition of these controls enhances bubble stability, increases the cooling power and boosts the productivity of the line. A thermally insulated carbon chamber manages


colder air flows, which further improves cooling perfor- mance. Precise thickness control guarantees a reduction of the two sigma factor by up to 80%. while maintaining a high degree of flexibility in production changes. Finally, in combination with the automatic system


lifter, Atlantis 23T improves production efficiency by 50% by automatically lifting the top ring to the desired height – depending on the production.


At the show, Contrex also demonstrated the Navigator 9000,


a system that manages the cooling ring, dosing system and thermal modulation in a closed loop -- centrally


coordinating all the production around the bubble film.


Cooling intensity Addex says it has taken air ring technol- ogy to a new level, with the launch of its Intensive Cooling Experience (ICE) system. The company says that multiple high velocity air jets – which flow in opposite directions – cool the blown film bubble very


efficiently, allowing the line to be run at higher speed. Addex has developed a ‘full blown’ version – which will be sold to machinery manufacturers – and a smaller version, which can be retrofitted to existing machinery by film extruders. The full version comprises four cooling elements


stacked together, and topped by a conventional air ring. Each element creates a low pressure zone, which holds the film in place with high stability. A critical element is that the speed of the airflow in the lower zone is much higher than normal. “It’s around 30 times the velocity than you normally


get in lower lips,” said Bob Cree, president of Addex. “This gives cooling all along the melt region before it gets to the primary air ring, which helps to boost output.” He says that the more efficient cooling can help lines to run up to 60% faster.


Click on the links for more information: ❙ www.be-ca.com ❙ www.davis-standard.com ❙ www.hosokawa-alpine.com ❙ www.moretto.com (Contrex) ❙ www.addexinc.com


G-SERIES®


QUAD PLUS™


CO-EX SHEET SYSTEMS


US Pat. #9,182,067 Chrome Roll Skew Mechanism


US Pat. #9,139,393 Roll Lock-Out Safety System


US Pat. #8,342,118 Sheet coating system


MULTI-PATENTED TECHNOLOGY World Class Sheet Extrusion Systems Model GCH841830 Horizontal Five Chrome Roll Stand Processing Technologies International, LLC | 2655 White Oak Circle Aurora, IL 60502 | Tel: 630.585.5800 | Fax: 630.585.5855


US Pat. #8,021,140 Linear bearing assembly


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58