Turntable shot blasting machine (also called a rotary table shot blasting machine) is a surface-cleaning and strengthening equipment used in foundries, machining workshops, and metal fabrication plants. It uses a rotating table to hold the workpieces while high-speed steel shots are blasted onto the surface by one or more blast turbines. Its purpose is to remove rust, scale, casting sand, old paint, and to improve surface roughness or strength through shot peening.
Function of The Turntable Shot Blasting Machine
Turntable shot blasting machine is one of the most stable and efficient cleaning systems we use for surface treatment. Its main function is to remove scale, rust, sticky sand, and old coatings from metal workpieces through high-speed abrasive impact. But in actual production, its value goes beyond simple cleaning.
1. Provides Uniform and Consistent Surface Cleaning
The rotating table is the core of the machine.
During operation, the workpieces placed on the table rotate steadily, ensuring all sides receive equal shot impact. This solves the common issue of “blind spots,” especially for parts with complex geometry.
Result:
- Stable surface roughness
- Even cleaning quality
- Better bonding performance for coatings, welding, and painting
2. Improves Surface Strength Through Peening
Besides cleaning, a turntable shot blasting machine also performs shot peening.
The high-energy abrasive stream impacts the surface, creating beneficial compressive stress.
Benefits for the workshop:
- Increased fatigue strength
- Higher resistance to cracking
- Extended service life of machined parts
3. Efficiently Removes Rust, Scale, and Sand
In foundry and machining workshops, most parts come with:
- Rust (oxidation)
- Hot-rolled scale
- Sand from casting
- Surface contamination
The machine can remove these quickly and thoroughly, reducing manual grinding and cleaning time.
This directly improves throughput and reduces labor intensity.
4. Suitable for Medium to Heavy Workpieces
Turntable shot blasting machines can handle workpieces that are:
- Too heavy for tumble belt machines
- Too small or in irregular shapes for hanger systems
- Not suitable for continuous conveyor systems
The table can be customized in diameter and load capacity, making it ideal for foundries, valve factories, automotive parts, pump housings, and gear workshops.
5. Provides Controlled and Stable Processing Parameters
As engineers, what we value most is controllability:
- Blasting time
- Impeller speed
- Abrasive flow volume
- Table rotation speed
With these parameters, we can produce consistent surface quality batch after batch, which is critical for quality assurance.
6. Reduces Secondary Processing and Improves Finish Quality
After blasting, the surface becomes:
- Clean
- Slightly roughened (but uniform)
- Free from oil, rust, and sand
This means welding, painting, machining, and coating processes become more stable and reliable.
Conclusion
The function of a turntable shot blasting machine can be summarized as follows:
- Surface cleaning
- Rust and scale removal
- Casting sand removal
- Surface peening and strengthening
- Improving coating and bonding performance
- Ensuring uniform and repeatable processing quality
Turntable shot blasting machine is a reliable machine that improves efficiency, reduces manual work, and guarantees stable surface treatment results.