Deblinding Balls

High Quality Deblinding Balls from Poly-Tek Improve Efficiency and Save You Money

It’s one of the primary causes of downtime and lost production in the screening process. It’s officially called “blinding” in the mining and aggregate industries, and it happens whenever the screen mesh openings are blocked by the material that is being screened. This not only prevents any material from passing through the screen during the sifting process, but it also adds to a company’s maintenance expenses and limits its productivity. In other words, it can be a real nightmare.

While there are several methods available to alleviate this unwelcome nuisance, deblinding balls are the most common approach. Many in the industry swear by these balls—typically made of polyurethane, rubber, or silicone–as being the most straightforward, cheapest, and most effective way to combat the problem of closed screen openings.

How do deblinding balls work?

Sifter screens require continuous cleaning. Deblinding balls, sometimes referred to as sifter balls, are abrasion resistant and provide constant bouncing along the screen mesh surface. This action loosens any material that is building up in the screen openings, and it allows the sifted material to move through the clean opening.

By merging the balls into the sifting process, they are allowed to work along with the screening action to dislodge any material that attempts to accumulate.

Sifter balls come in various shapes and sizes

Some manufacturers can produce and supply deblinding balls in different forms. For example, parallellepipedum balls and egg-shaped balls have irregular shapes, which cause them to bounce arbitrarily, getting into those hard-to-reach areas on the screen that regular round balls might miss.

One size does not fit all. Depending on your mesh opening, you can purchase balls in diameters ranging from 5/8” up to 2 inches.

You can choose your material

Specific applications require that you use deblinding balls that meet FDA regulations so they can’t contaminate the grains they are sifting. Here is a list of available compounds and their applications:

• Polyurethane: Food grade material that is chemical and abrasion resistant. It has excellent wear life and cleaning action.
• Black or white natural: Food grade rubber with abrasion resistance and tear strength.
• Neoprene: Another food grade material that resists fats, oils, weather, and ozone.
• Black EPDM: Good weather, ozone, and abrasion resistance, along with a wide temperature range.
• Nitrile: Similar to neoprene but with slightly better abrasion resistance.
• Translucent silicone: Food grade that works well in higher temperatures. It is resistant to oxidation and ozone.

Which applications lend themselves to deblinding balls?

The short answer is “most applications.” However, it should be pointed out that the balls create a fair amount of impact energy to the screens, which makes them more suitable for courser meshes that would be less susceptible to damage. They are very good at dislodging jagged-shaped particles that get stuck in the mesh openings and for materials that are sensitive to shearing and might smear or accumulate.

Whatever application you need, deblinding balls generally have a reputation for long life and high quality. Contact Poly-Tek today to discuss your deblinding ball needs – [email protected] or 510-895-6001.