Dynamic Decaler Contact
Air Knife


Air Knife

This is part of the air lock group of components. As the name already indicates, it is a type of ionizer which is supported by air flows.

The effectiveness of the Air Knife can be explained by the special design of the air discharge nozzle which creates the so-called Coanda Effect.

The Coanda Effect

In contrast to full flow nozzles, ionized air is discharged from a slotted nozzle, creating a flat jet flow. Air flow (Luftstrom) without deflection due to uniform injection

The special construction on the underside of the knife effects a single-sided reduction in the injection (air suction from the atmosphere) which creates a vacuum and ensures that ionized air is directed to the material track.

  • Oben = Top
  • Schlitzdüse = Slotted nozzle
  • Ablenkung = Deflection
  • Unterdruck = Vacuum
  • Ionisierungsstab = Ionizing bar
  • Ionisierter Luftstorm = Ionized air flow
  • The COANDA effect
  • Air flow with deflection

Reducing the injection affords the air blast operated Air Knife ionization unit two particularly positive aspects:

  1. The air discharge speed is increased,resulting in increased effective depth. This in turn permits a greater operating distance of the Air Knife to the material line.
  2. The slotted flow has a wider angle of dispersion, which is expanded from 24° to 33°. A wider surface is therefore covered with ionizing, neutralizing air.

Applications

Plastic Processing Industry

  • Foil processing, packing machines, foil extruders etc.

Textile Industry

  • Weaving mills, spinning mills, textile finishing etc.

Graphic Industry

  • Screen and tampon printing machines, photographic and film processing machines, folding machines etc.

Enamelling Operations

  • Car paint operations, painting/enamelling of plastic parts etc.

Technical Illustration

Attachment nuts between the first and second clamping screw

 
Laenge Auftragsbezogen = Customer specific length (120 mm - 50 cm)
Befestigungsmutter = Attachment nut
Luftanschluss = Air connection
HS-Anschluss = HS connection
Anschlusskabel = Connecting cable
Stablaenge = Length of rod
Innengewind = Internal thread M 6
Blasrichtung = Direction of air blast