Shamrock Systems Assists Sheet Metal Fabricator to Solve Faulty Screen Situation
Equipment Vendor: Sweco
Industry: Blast Media
Product: Sheet metal fabricator
The customer came to Shamrock Systems to provide a series of screens for a competitor’s 48-inch round deck screener so it would increase performance and productivity. The screens are currently lasting 4-5 weeks in continuous operation. Because existing screens were becoming blinded by the material, blasting media prevented the fines from falling through the screen mesh and were included with the on-spec blast media. Mesh was failing at the center support stub where the product first hit the screen and wearing out around the outer ring of the screen, reducing the life of the screen mesh.
VENDOR SOLUTION: *
Upon review of the existing screening operation, Shamrock decided the first area to be addressed was the screen life. We initiated the following steps to increase the life of these screens:
- An underlayment of a coarser mesh was added to the top 60 mesh screens and the latter 200 mesh screens to support the screening mesh.
- To prevent screen blinding, 250 nylon sliders and a support bottom mesh were added to the screen. Sliders were placed to hit the bottom of the screen to release any of the blast media being lodged in the screen openings.
- The diameter of the center support of the top 60 mesh screens was increased, resulting in the blast media dropping onto the solid stainless steel ring rather than directly onto the screen mesh.
- A layer of silicone was added around the outer diameter of the screen mesh, so the blast media does not wear out the outer area where the screen mounts to the ring.
*All of these modifications were made into one 60-mesh sandwich and one 200-mesh sandwich screen.
The screen set operates for more than 7 months versus 4-5 weeks without fail. The customer is very happy to order screens twice a year rather than monthly. The greatly increased screen run times allowed maintenance/operations to focus their time at other locations in the plant.