EXHIBITION REVIEW | PLAST 2018


Above Macchi ran a high- output POD blown-film line fitted with a new double-lip air ring


mer still fall short of what is obtainable with today’s LLDPEs, although it continues to improve. The Tecom line can also be used for processing LDPE.


Fast cast Cast film lines, though not as spectacular as blown film lines, can still be highly impressive. Colines demonstrated its fastest-ever AllRollEx 1500 cast film line at the show. The equipment has already run at 1000 m/min in the company’s laboratories in nearby Nibbia. At the show, it fell just short, achieving 980 m/min of a 12 micron film, with a real energy consumption lower than 0.4 kWh/kg. In any case, this is considerably faster than speeds achieved on previous generations of equipment. The line, which can produce hand, machine and


jumbo rolls on two- and three-inch reels with the Allspeedy automatic winder, had four extruders extruding five-layer film with ExxonMobil Exceed, Vistamaxx and LLDPE resins. Colines says it has also carried out improvements to its Bigmouth trim recovery system to accommodate the higher speeds. Colines also exhibited the Allwrapper LS orbital


Right: A view from the top of the Colines AllRollEx 1500 cast film line


stretch wrapping unit, engineered by the company and manufactured by Lanfranchi, a specialist in this area. The equipment can be used for bundle-wrap- ping a wide range of products – such as bottles, jars, cans and boxes – in different materials. “The intrinsically money-saving wrapping


process (avoiding the need for a shrink tunnel) permits a saving of more than 50% on packaging material and more than 90% in energy consump- tion,” Colines claimed.


Winding power Amut, meanwhile, was highlighting its Prowind four-shaft winder (not on the stand, but at its open house in Novara), which can be used for machine rolls, hand rolls, and jumbo rolls. Saša Davidovic,


34 FILM & SHEET EXTRUSION | July/August 2018 www.filmandsheet.com


sales director of Amut’s film division, highlighted various key features of the winder, which accepts two- and three-inch cores and can operate at the same high speeds with both. There is no need for composite roller shafts. There is no direct motorisa- tion on the shafts, with synchronisation being done using a contact-free magnetic system that creates no friction and hence no vibration. Each roll is weighed during the unloading phase, so there is no need for values to be obtained by extrapolation from processing data. Cutting blades are non-oscillating. Amut also offers a packaging unit for the finished rolls. Rolls can be loaded into boxes, or in the case of jumbo rolls, a label can be printed on the inside of the core. In any case, all parameters are saved in a central control system. Each finished roll is weighed before being conveyed to the packaging unit. Notable features of the winder include an


indexing cycle time that has been cut to 18 seconds; and an absence of pneumatic and hydraulic components, with contact roll pressure being adjusted electrically adjusted; very high- speed changing between two- and three-inch rolls; and synchronisation of the speed of the incoming air-shaft using a magnetic field and without direct contact with any motor (eliminating friction). All rolls in contact with film are coated with special material that improves the grip of the film and eliminates air entrapment. Davidovic also highlighted Amut’s Roto-Feed


trim recycling system, based on a centrifugal pump rated at 4kW, which he said is well below that of rival systems. It is capable of recycling up to an unlikely 50% of total line output. “This is a zero-fluff solution, which requires less


reheating than other solutions, there is no regranu- lation and it produces fewer gels,” he said. The Roll Pack 4.0 packaging system is available


PHOTO: PETER MAPLESTON


PHOTO: COLINES


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