| 摘要 |
A method includes receiving a measurement associated with an anisotropy of a first surface and a measurement associated with an anisotropy of a second surface of a sheet of material (108, 215). The method also includes adjusting an operating parameter associated with a headbox (112, 240-250) based on the measurements. The headbox is associated with manufacture of the sheet. The operating parameter could include a jet speed (144), a jet impingement angle (148), a jet thickness, a slice opening, and/or a slice apron projection (142). Adjusting the operating parameter could be based on a difference between a measured anisotropy of the first surface and a measured anisotropy of the second surface. For example, the operating parameter could be adjusted to achieve a desired difference between the measured anisotropy of the first surface and the measured anisotropy of the second surface. Multiple headboxes (240-245) could be controlled, such as when different headboxes are used to produce different layers of a multi-layer sheet (215). |
