1. What is the difference between a shot blasting machine and a sandblasting machine?
A shot blasting machine uses centrifugal force to project metal shots onto the workpiece surface at high speed. It offers strong impact and is suitable for high-volume cleaning and strengthening. A sandblasting machine uses compressed air to propel abrasive media, offering high flexibility and is suitable for complex-shaped workpieces and fine finishing.
2. What types of workpieces can a shot blasting machine handle?
It can handle various metal workpieces including castings, forgings, steel plates, structural steel sections, steel pipes, gears, springs, wheel hubs, engine cylinder blocks, and welded structures.
3. What surface effects can be achieved after shot blasting?
It removes scale, rust, welding slag, and old coatings, revealing the bare metal surface while creating a uniform rough profile that enhances coating adhesion. Shot peening can also improve the fatigue resistance of workpieces.
4. How do I choose the right shot blasting machine for my needs?
Selection is mainly based on workpiece size, shape, material, production volume, and process goals. Small loose parts are suitable for tumble belt machines, complex large parts for hook type machines, and long plates and structural steel sections for roller conveyor through-feed machines.
5. Does a shot blasting machine require a pit to be dug?
Not necessarily. Hook type and some tumble belt machines require no pit and are easy to install. Roller conveyor through-feed machines typically require a pit or ramp, depending on the machine model and site conditions.
6. What are the wear parts of a shot blasting machine?
Main wear parts include blast wheel blades, metering wheel, control cage, wear-resistant chamber liners, and dust collector filter cartridges. Replacement intervals vary depending on usage frequency and workpiece type.
7. Does a shot blasting machine generate a lot of dust during operation? How is it handled?
Modern shot blasting machines are equipped with high-efficiency dust collection systems that capture and treat dust during operation, with emission levels meeting environmental standards. Attention should be paid to the dust collection system configuration when selecting equipment.
8. Can a shot blasting machine process aluminum alloy parts?
Yes. However, stainless steel shots or ceramic shots should be used to avoid iron contamination, while blasting speed and angle should be adjusted to prevent workpiece deformation.
9. What is the service life of a shot blasting machine?
Under normal operation and regular maintenance, the service life of a shot blasting machine can typically exceed ten years. Timely replacement of key components and daily maintenance are crucial for extending its lifespan.
10. What should I do if the cleaning result of the shot blasting machine is uneven?
First check whether the blast wheel blades are worn, whether the control cage window position has shifted, whether the abrasive supply system is clear, and whether the abrasive flow is sufficient. Normal results can be restored after troubleshooting step by step.
11. Can a shot blasting machine run continuously for 24 hours?
Yes. However, preventive maintenance is required, including regular checks of bearing lubrication, wear part condition, and dust collector pressure differential, to ensure stable operation during continuous running.
12. What issues should be considered when purchasing a shot blasting machine?
Clarify your own workpiece characteristics and processing requirements, evaluate the manufacturer's technical capability and after-sales service, request sample test reports, confirm equipment configuration and delivery schedule, and specify warranty scope and responsibility terms in the contract.
