Slot Die Coater Air Knife for Controlled Drying Conditions
Choose between an adjustable bracket or an independent mounting system for optimized air flow angle and distance
Overview | Specifications | Gallery
Our adjustable air knife gives you the ability to control the drying of films produced with the Ossila Slot Die Coater. The Ossila Standard Air Knife attaches directly to the slot-die coater head with an adjustable positioning bracket. With this, you can vary the distance between the substrate and airflow and the angle of the air curtain for optimized drying conditions.
The High Precision Air Knife is specially designed with an overlapping lip and customizable quenching width, eliminating turbulence, mitigating air backflow, and also provides a uniform air stream across the entire length. The isolated mounting system allows you to adjust the quenching gap and the quenching angle over a larger range than the standard air knife. Additionally, you can vary the distance of this Precision Air Knife from the slot die head. The Z-axis Tension System ensures the air knife sits exactly where you need it while the Geared Clamp Design provides flexibility for angular positioning without pivoting or sagging during operation.
Both air knife designs are compatible our 50 mm and 100 mm slot die heads. With the 4 mm push-fit adapter (or 6 mm push fit adapter for high precision unit), you can quickly connect your air knife to a compressed air or pressurized gas line, such as nitrogen for inert gas quenching.
Specifications
Standard Slot-Die Air Knife
| Air Knife Material | Aluminum 7065, black anodization |
|---|---|
| Air Curtain Width | 100 mm |
| Total Head Width | 120 mm |
| Max Inlet Pressure | 6 Bar |
| Minimum Inlet Pressure | 2 Bar |
| Input Adapter | 5 mm threaded screw to 4mm push fit |
| Adapter Material | Nylon |
| Height Adjustment | 20 mm |
Please note: The Ossila Air Knife is only compatible with our counterbore slot die heads. Ensure that the clamping screws for your slot die head are counterbored.
High Precision Slot-Die Air Knife
Air Knife
| Air Knife Material | Aluminum 7065, black anodization |
|---|---|
| Air Knife length | 115 mm |
| Quenching width | Up to 95 mm |
| Shim Material | Stainless Steel |
| Shim Thickness | 200 µm |
| Shim Quenching Widths | 20 mm, 45 mm, 70 mm, 95 mm |
| Input Adapter | 1/4 NPT to 6mm push fit |
| Adapter Material | Nylon |
| Max Inlet Pressure | 7 Bar |
| Adapter Material | Stainless Steel |
Mounting System
| Clamps Material | PA12 Nylon |
|---|---|
| Rail Carrier Material | PA12 Nylon |
| Shaft Holder Material | PA12 Nylon |
| Bracket Holder Material | Stainless Steel |
| Rail Shaft Material | Stainless Steel |
| Threaded Rod Material | Stainless Steel |
| Spring Material | Stainless Steel |
| Knob Material | Technopolymer Plastic with Stainless Steel Bush |
| Quenching angle | From -30 ° to +90 ° with 10 ° step (Perpendicular to the substrate = 0°) |
| Quenching gap | Up to 30 mm |
| Distance from Slot Die Head | x - y mm |
The Coandă Effect
The design of the Standard air knife utilizes the Coandă effect. Air exiting the slit between the two parts of the knife remains attached across the convex curved surface, resulting in a pressure drop that entrains additional air into the flow. This results in a multiplier effect in which the air flow within the air curtain is higher than that exiting the slit.
Reducing Air Turbulance With High Precision System
Air turbulence and gas backflow are among the most critical challenges of the gas quenching technique when using conventional air knives, as they cause pre-drying and non-uniformity along the length of the film. Our precisely engineered air knife system ensures that you achieve uniformly quenched, high-quality films over a large area.
