There is a debate in the packaging industry about how to drive labeling equipment. What is the best energy source for labeling – compressed air or electricity? Pneumatic labeling systems are based on timed commands, the labeling process depends on the reliability of the pneumatic air supply. All-electric labeling systems control the labeling process based on real-time data-based commands that provide complete control of the labeling process.
Precise control via sensors
Have you ever seen a product hit the dispensing arm of a pneumatic labeler while being transported on a conveyor belt? This often happens with pneumatic labelers because the control of the label feed and dispensing arm is not based on real-time feedback from sensors. Instead, pre-programmed timing commands are executed that assume a constant compressed air supply (regardless of actual pressure).
Diagraph’s all-electric labeling systems work differently. They receive real-time feedback from sensors, allowing complete control of the label throughout the dispensing process. By combining strategically placed sensors with electric servo motors, Diagraph labeling systems operate with extreme precision. This guarantees a constant placement of the label on the product. The all-electric dispensing arm always operates at a constant speed. The sensors confirm that a label is present on the dispensing stamp and allow control of the complete dispensing process. The electric labeling system does not depend on constant air pressure to function properly.
One dispensing stamp suitable for different label sizes
Another advantage of the all-electric process over the pneumatic one lies in the dispensing die. Pneumatically driven labelers use Venturi vacuum technology to control the transport of the label from the dispensing die to the product. Almost the entire surface of the dispensing die must be covered by the label in order to achieve a sufficient vacuum. In contrast, all-electric labelers use an electric fan to create the vacuum. This allows multiple label sizes to be applied with a single dispensing die. This saves time and costs when changing the label size.
Diagraph – Marking systems since 1893
With more than 120 years of experience in the labeling industry, Diagraph has a long history of producing durable and reliable labeling solutions. Diagraph was the first company to offer all-electric labeling systems for all types of application including Tamp, Swing and Tamp-Blow. The latest generation devices offer all the above advantages, and are also extremely economical and robust.
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