A hydraulic headbox installed on a modern tissue machine is designed to deliver a uniform, low consistency stock stream to the nip between the two forming fabrics. Several geometries of the stock jet, including jet length, jet angle, and jet impingement, have a large effect on sheet formation and sheet quality. This module covers some common headbox adjustments and other equipment settings that can affect the stock jet geometry.
•Describe the purpose of the headbox in the tissue making process
•Define the terms "jet length," "jet angle," and "jet impingement"
•Identify the jet length, jet angle, and jet impingement in a stock jet diagram
•Describe the impact of stock jet geometry and sheet formation on the appearance and strength properties of the sheet
•Describe the effects of the slice opening and fan pump speed on stock jet geometry
Industrial Libraries
- Convergence Industrial Maintenance Library
- Convergence Tissue Library
- Industrial Premium