| 摘要 |
<p>The doctor blade of a dosing system for distributing and stripping a fluid or viscous medium on running material web such as paper or cardboard web, where the fluid or viscous medium is applied in excess and is removed by the doctor blade from the desired stroke weight is claimed. The doctor blade is a cold drawn profile tube (10) that is equipped at its external circumference (12) with two axially parallel, molded lips (11), which have a thickness increasingly enlarging from external circumference of the tube, where the thickness is reverted radially to external circumference of the tube. The doctor blade of a dosing system for distributing and stripping a fluid or viscous medium on running material web such as paper or cardboard web, where the fluid or viscous medium is applied in excess and is removed by the doctor blade from the desired stroke weight is claimed. The doctor blade is a cold drawn profile tube (10) that is equipped at its external circumference (12) with two axially parallel, molded lips (11), which have a thickness increasingly enlarging from external circumference of the tube, where the thickness is reverted radially to external circumference of the tube. The tear-off edges of the lips lie related to the external circumference. The lips are distributed over the external circumference and arranged symmetrically to each other or asymmetrically on the profile tube. A high-strength layer (15) reducing the friction is applied on the surface of the lips and is a diamond-like-carbon coating based on carbon. The number of lips is dependent upon the running speed of the paper or cardboard web to be coated and the layer thickness applied on the paper- and cardboard web. The interior diameter (16) of the profile tube is circular and is formed like the external profile.</p> |
