The Science of Profile Die Balancing

摘要

During the first trial of the new die, it is important to shoot for the "power wall," or the overall width dimension of the profile. After a short sample is saved and marked with an arrow depicting the direction of flow, make a simple observation before shutting the extruder down. Take a brass scraper, sever the extrudate at the die lip, and judge the flow velocity at full production running speed. The now areas typically running faster are rhe heaviest areas.