What is the most important thing to remember when using bowed rolls? | |
Maintain the proper geometry! Bowed rolls can be a very effective and aggressive web spreading device. However, to get the most from your bowed rolls it is extremely important to maintain proper geometry. Here are some rules of thumb when applying bowed rolls:
One last word about bowed rolls; when applied properly they will effectively remove wrinkles. But the question is, what are you doing to your web by utilizing a bowed roll? The potential problems with bowed rolls are not that they do not take wrinkles out, they do. The problem is that the web tension profile as the web travels over the bowed roll is not even. Due to the raised center of the bowed roll, you will deliver added tension to your web in its center. How will that affect your material? Will your material be distorted by your bowed roll? That is the question to ask when using bowed rolls to remove wrinkles. | |
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