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Home > MacroLetter > 14.1 - Summer 2010 > Machinery Spotlight
MacroLetter 14.1 - Summer 2010
Contents:
Machinery Spotlight
Macro has received a new patent for its recently upgraded D10 PRO automatic air ring.
The latest upgrades to the D10 PRO were created to simplify the operation of the air ring. Upgrades included new valves and motors for each control zone to improve reliability and redesigned software for faster and simpler startups. Installation has also been simplified by replacing heavy connection cables with a pair of light power and communication cables.
Macro utilizes two general scanning methods with the D10 PRO; a traditional rotating scanner system that senses the film thickness as the bubble rises in the tower, and a flat scanner system that takes film thickness readings after the bubble has been collapsed. “Both systems provide advantages,” states Macro's R&D Director, Felix Guberman. “The flat system allows the use of a wider range of non-nuclear scanners such as infrared, X-ray or ultrasound and can complete scans quicker. The rotating scanner setup requires less complicated setup and software.”
Vacuum Drum = Zero Foldover Roll Transfers
Macro has developed a specially designed vacuum drum roll to improve control during roll transfers on their AUTOMAX-S surface winders.
The vacuum drum contains strategically positioned perforations that allow air to be drawn towards it’s surface. This forces the film to adhere to the drum as the winder’s cut and transfer cycle is executed. Also incorporated into the sequence is a specially designed cutting arm assembly that rotates by cam in synch with the drum.
The result is zero foldover transfers with perfectly straight cuts resulting in web entirely useable right to the core.
The vacuum drum can be added to certain winders as an optional feature. It is particularly effective for single or 3-layer PE films with thickness of 25-150 microns.
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