The operation and properties of an air knife

The Operating Principle

After compressing the air in the air knife, it blows out at high speed with a narrow airflow that is just 0.05 mm thick on one side. This thin -screen air curtain can maximize 30-40 times of the ambient air, generating a thin high-strength, atmospheric shock curtain, using Cohenda effects and the specific geometric shape of the air knife. The functioning method of the air knife divides it into two types: ordinary air knife and super air knife. The ordinary air knife is blown 90 degrees, and the super air knife level is blasted out.

1.Air knives are made from aluminum alloy or stainless steel.

During the production process, the aluminum alloy air knife is plated. The service life is significantly longer than that of comparable items. Stainless steel air knives can be utilized in environments with high temperatures and corrosion.

2.The "full air flow" design, in which the breadth of the air knife matches the width of the air curtain. The air knife's back is inserted and attached to the threaded holes, which may be combined as needed.

3.The maximum drainage of the air knife is 40 times that of ambient air, and the volume of air used is just one-fifth that of a standard air-blowing pipe.

4.There is no any wear inside the air knife. The internal gasket is made of stainless steel, and the service life is up to 10 years.

5.Air knife use compressed air to drive, no electricity, can be used in explosion -proof environment.

The role and application of the air knife in the electronics industry

Please explain the function and application of the air knife in the electronics sector.

The following are examples:

1. The air knife's function is to blow off any additional loose incense on the PCB board and to keep the fire from leaking on the preheating region during the preheat. The size of the rosin allows you to flexibly modify the air of the air knife. The metal terminal of the tin is required for auxiliary liquid rosin wet PCB. Expands the moist area. Furthermore, some stoves contain hot air knives, which are the second wave of peaks used to eliminate short-circuits.

2. The air knife may also be used to blast the welding agent sprayed on the foot of the components into a uniform layer. Simply expressed, while using wave peak furnaces, the major job of the "air knife" is to blast off surplus welding agent from the PCB board surface and uniformly coat the welding aid on the PCB sections.

3. Under typical conditions, the tilt angle of the air knife should be approximately 10 degrees; if the "air knife" angle is changed arbitrarily, it will produce excessive PCB surface welding or the coating will be uneven.

In the heat pipe, it affects the life of the heating pipe, and it will affect the smoothness of the PCB surface after welding, and may even cause the adverseness of the tin of some components.

4.It should be noted that the angle of the air knife installation can be located when debugging the machine. In the process of use, the repair and maintain do not make random change. If there is a change, communicate with our professional and technical personnel.