Many users often encounter problems during the use of shot blasting machines, such as incomplete rust removal of workpieces, uneven surface brightness, local residual oxide skin, and substandard rust removal accuracy, which seriously affect subsequent painting, anti-corrosion and other processes. Based on years of equipment research and after-sales experience, Qingdao Kechang Machinery has summarized the core causes and targeted solutions to help users quickly troubleshoot and restore normal operations.
1. Bullet factors: The most common reasons are uneven particle size, severe wear of the bullet, and insufficient filling of the bullet. The bullet is too thin and lacks sufficient impact force, making it impossible to remove thick oxide skin; Coarse bullets can easily cause uneven surfaces on the workpiece, and worn bullets can reduce the ejection effect. Solution: Regularly screen and replace worn pellets, fill sufficient pellets of the same specification according to equipment standards, and ensure the uniformity of pellets.
2. Improper setting of equipment parameters: deviation in shot blasting angle, excessive equipment walking speed, and insufficient shot blasting time can lead to partial ejection of workpieces that are not in place. Automated equipment needs to adjust its operating speed and ejection duration according to the thickness and degree of corrosion of the workpiece, while manual operation equipment needs to standardize the ejection angle to avoid quickly sweeping the surface of the workpiece.
3. Shot blasting machine malfunction: Wear of shot blasting machine blades, impeller jamming, and blockage of the shot separation wheel can cause uneven ejection force and offset of shot ejection, directly affecting the treatment effect. It is necessary to regularly inspect the core components of the shot blasting machine, replace worn blades in a timely manner, clean up blockages and debris, and ensure the stable operation of the shot blasting machine.
4. Unreasonable placement of workpieces: Excessive stacking and overlapping of workpieces can cause local areas to be unable to contact the projectile, resulting in rust removal blind spots. During homework, it is necessary to place the workpieces reasonably and reserve sufficient space for ejection. For large workpieces, the lifting angle can be adjusted to ensure that there are no blind spots in all directions.
