Understanding Air Knife Features and Functions

in Air

Air knife is a flexible device found useful in many operations and applications in the industrial business. The process of operating this device is simple yet reliable enough to perform various functions. Air knives use compressed air which enters the device from the rear ports. The air is then entrained and follows the “Coanda” effect. The air then moves to the front profile of the device wherein the air is directed in a straight line at 90° angle. The released air stream has now amplified speed and force with a sheet of laminar flow which will be used for cooling and blow off.

Air knives do not have moving parts and use only compressed air as power source. The device is capable of producing an output volume of twenty times higher than that of received input. The mechanical apparatus is usually produced in aluminum or stainless material, making it resistant over high temperature environments and operations. Some air knives marketed in the market are advertized as with a full circulation air knife system, but for flexible and low-cost tool, rugged types with multiple ports are advisable.

Various air knife models may have different features. But, in choosing the one with great benefits here are the features you must consider with their respective advantages:

  • Look for air knives with body coating of aluminum and hard-coated cap, for a longer-lasting tool even if it would be subjected to extreme environments. Moreover, if your air blade will be subjected to corrosive applications, choose models made with stainless steel.
  • Air blades which have numerous inlets will make the tool flexible enough to be mounted in constrained spaces.
  • It is also wise to choose air knives with airflow increase of about 30:1 rather than with 3:1 only with this feature; energy is reduced up to 90% and noise reduction of 10dbA.

Because it is used in numerous applications, air knives can be manufactured in different lengths, which are produced with combination of the standard sizes.

The tool is used in numerous applications such as cleaning, drying and cleaning in different industries. Among the uses of air knife include:

  • Removes water, dust, coolant and scrap from manufactured parts of automobiles.
  • In bottling process, used to blow off water before labeling or packaging.
  • Cleans and dries cloth and similar materials in textile industry.
  • Removes water from food products or packaging. Dries food and is used to open pouches during bagging process.
  • Cools ink in printing process. Blows off scrap and cools adhesives
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Frank Swing has 66 articles online

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Understanding Air Knife Features and Functions

This article was published on 2011/11/20