BUILD UP (RIDGES) - A 40 YEAR ODYSSEY/covering Quarter Line Buckles, Short Choppy Edge Waves, and Featheredges

摘要

The term Build Up came from seeing a ridge or bulge form on a coil of tin plate or light gage strip. Other mills called this defect Ridges because it looked like a ridge in a landscape as seen in Photo 1. The term Loma is used in Spanish speaking countries, and other mills call this a Floppy Center. At first the Build Up was reported to be near the center of the strip, but later this phenomenon was identified near the edges, and the terms of Edge Build Up, Edge Ridges, or Franja were use to distinguish this type of Edge Build Up. Over the years in solving this problem, the causes were found to be similar to the conditions that create Quarter Line Buckles, Short Choppy Edge Waves, and Featheredges.