Converting & bag-making equipment | machinery feature
Plastic bag production is getting ever-faster, with new technologies offering more fl exible options to converters
In the bag
Although plastic bags are under the cosh at the moment – with
everywhere from Haiti to Bangladesh
having banned them – there is no let-up in the develop- ment of new machines to make higher quality bags at ever-faster speeds.
US-based CMD has developed a bag machine and winding system that offers converters continuous-mo- tion sealing at an economical price.
The CMD 864 global bag machine and winder claims
to offer converters a wider processing window than traditional, intermittent-motion or shuttle-style bag machines. This means that it seals a wide variety of fi lm structures and gauges. It produces perforation-connected bags on coreless
rolls. Compared with folded bags, bags-on-a-roll are more effi cient to produce, stock, ship and store, claims CMD.
Rotary sealing CMD rotary sealing allows converters to adjust the amount of time the heated seal bar is in contact with the fi lm. The technology can convert at up to 450ft/min (138m/min), for bags made from bio-resins, post-con- sumer resin or downgauged fi lms. At the heart of the system is a seal-drum design that
allows fast, simple changeover from one job to the next. The infi nitely adjustable drum gives converters the fl exibility to run a variety of product sizes. Simple recipe storage means common jobs can be saved and retrieved with ease. CMD says that because its rotary sealing drum uses
fl uid continuous-motion, this makes for longer lasting parts, less stress on the system and less maintenance downtime.
www.fi lmandsheet.com December 2012/January 2013 | FILM & SHEET EXTRUSION 25
Elba has introduced its BM11BW range of automatic high-speed bag making
machines to produce bottom-sealed bags.
The machines can produce a range of products, including: small and large bags, with or without side gussets; very thick bags, and bags with a maximum length of 3m; bags with upper sealing and perforation ‘block notes’ type; and folded bags with ‘star’ sealing. There are three models in the range: BM11BW-09
has a fi lm width of 1200mm and a useful welding width of 900mm; BM11BW-11 has a fi lm width of 1600mm and a useful welding width of 1100mm; and BM11BW-13 has a fi lm width of 2000mm and a useful welding width of 1300mm. All three models make bags of 250-3000mm in
length and have a maximum fi lm speed to 180m/min. They are also equipped with the latest human-machine interface (HMI) based on Siemens Profi bus technology. The new machines can reach up to 400 strokes/min. This high output is due to a number of technical
Extruder and bag-maker CTP Flexibles
recently bought fi ve new Titan machines for its slitting hall
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