CHICAGO — Extrusion Dies Inc. (Booth N5257) built a new microgrinding operation at its Chippewa Falls, Wis., headquarters plant.
The investment of more than $1 million provides exceptional smoothness and flatness in flat dies, the firm said in a recent announcement. These properties are especially critical for tight-tolerance web coating and extrusion of high-performance film and sheet.
EDI bought two computer numerically controlled surface grinders, each capable of grinding to a flatness of plus or minus 0.002 millimeters, according to the company. It also installed a laser coordinate measuring machine to monitor surface finish.
It installed the new equipment in a climate-controlled room built to National Bureau of Standards criteria.
Extrusion Dies claims to be the world's largest producer of flat dies for film and sheet, coating and strand extrusion.
The company builds more than 600 dies annually and exports about half of them. EDI uses three-dimensional computer modeling of melt flow to help design dies specific to customer needs.
Extrusion Dies also makes feedblocks, deckling systems, vacuum boxes, air knives and related equipment.
The company reworks its own dies and dies built by other suppliers. It licenses additional rework facilities in Germany, the United Kingdom and Japan.