The shot blasting unit is a core component in the operation of a shot blasting machine. The performance and blasting efficiency of the shot blasting unit directly affect the overall performance of the shot blasting unit.

When operating a new shot blasting unit, insufficient commissioning and adjustment can significantly reduce the blasting efficiency of the shot blasting wheel, thereby affecting the cleaning performance of the machine. The following methods can be used to optimize the shot blasting unit for the best operating condition:

1. Increase the Abrasive Supply

Increase the amount of abrasive material supplied to the shot blasting wheel to improve blasting performance.

2. Adjust the Directional Sleeve Position

Adjust the position of the directional sleeve. By rotating the directional sleeve, the direction of the abrasive stream can be adjusted within the blasting range.

However, if the abrasive stream deviates too far to the left or right, the blasting power will decrease and the radial guard plate will wear more quickly.

Determining the Directional Sleeve Window Position

A. Place a slightly rusted steel plate or a steel plate marked with coating inside the blasting area of the shot blasting wheel. Start the shot blasting wheel and allow the motor to accelerate to the appropriate operating speed.

B. Manually open the shot gate and, after approximately 5 seconds, allow the abrasive to enter the impeller. The rust or coating on the steel plate will be removed by the abrasive.

C. To adjust the directional sleeve, use a 19 mm adjustable wrench to loosen the three hexagonal bolts on the pressure plate until the directional sleeve can be rotated by hand. Adjust and secure the directional sleeve, then perform another blasting test to verify the setting.

By adjusting the direction of the directional sleeve window, the direction of abrasive projection can be changed. The distribution and trajectory of the abrasive should be checked during adjustment to achieve the desired blasting pattern.

3. Ensure the Correct Relative Position of the Shot Divider and Impeller

The opening of the shot divider should be positioned between two blades of the impeller. This arrangement provides good cleaning performance.

If the opening of the shot divider is directly aligned with a blade, the abrasive particles discharged by the divider will be blocked by the blade, reducing the amount of abrasive projected and consequently affecting the cleaning performance.

After several adjustments and commissioning tests, the optimal blasting performance of the shot blasting wheel can generally be determined. Once the correct setting has been established, subsequent operators will not need to repeat the adjustment process.