Bobst Unveils K5 Expert

PrintAction Staff
November 07, 2016
By PrintAction Staff
In front of more than 80 international customers in its Mex, Switzerland, facility, Bobst unveiled what the company describes as the highest productivity metallizer in the world.

The Bobst K5 Expert, successor to its K5000 metallizer, can run at speeds up to 1,200 metres per minutes and is available in widths from 2,450 to 3,650 mm and can house increased roll diameters of up to 1,270 mm to meet new industry trends. The vacuum metallization system, aimed at the packaging industry, houses what Bobst describes as the largest coating drum in the industry at 700 mm, which improves collection efficiency by 16 percent. This means less aluminium consumption and increased boat life.

The K5 EXPERT features a totally redesigned evaporation source providing the widest coating window in the market, which Bobst states to be up to 50 percent wider than some competitor. This larger window translates in better coating uniformity and collection efficiency, minimizing aluminium wire waste.   

A more intuitive HMI screen and software interface make the machine easy to operate. Its new design allows the operator to run everything from the front of the machine and to be positioned much closer to view the evaporation source and metallization process through the strobe window.

Another new feature, which the company describes as unique in the industry, is the Automatic Sequential Control (ASC) system, which speeds up start-up of the machine with minimum operator involvement required, making the K5 EXPERT easy to operate.

In addition to the Bobst Winding Mechanism, based on true tension control, the new model incorporates low friction Ferrofluidic seals for better tension control on the rewind – producing a virtually wrinkle-free roll-to-roll vacuum metallization process.

The K5 Expert also has a variety of energy saving and waste reduction features including ECO mode which reduces energy consumption by up to 50 percent during stand-by and Film Save mode which has a synchronized faster shutter action (opening in just five seconds) and aluminium wire ramp up to minimize the amount of un-metallized film (waste) to less than 400 metres per roll, explains Bobst.

As an option, the High Deposition (HD) source has an improved design for higher speed of operation for those metallization jobs that require a high deposition rate of up to 4.0 OD.
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