The headbox has three primary functions: effectively dispersing fibers to prevent flocculation; uniformly distributing the stock across the width of the paper machine; and stabilizing the jet flow to ensure the proper ratio between jet speed and wire speed. The air-cushion headbox is a key member of the headbox family, distinguished primarily by its fully enclosed structure.
1. Strong suppression of pressure fluctuations
The air cushion effectively absorbs pressure pulsations from the upstream stock supply system, stabilizing the jet speed and significantly improving the paper’s machine-direction (MD) basis weight uniformity.
2. Wide operating speed range
Coordinated adjustment of air cushion pressure and stock level makes it suitable for various types of paper machines.
3. Excellent stock adaptability
It adapts well to fluctuations in stock consistency and flow rate, making it suitable for producing a wide range of paper grades, including fine paper, packaging paper, specialty paper, and heavy-gauge paper.
4. Significant improvement in cross-direction (CD) basis weight uniformity
This high-quality equipment can reduce cross-direction basis weight fluctuations by more than 40%.
5. Smooth inner surface prevents stock buildup
Components in contact with the stock are made of stainless steel with an internal surface roughness of 0.4 μm, effectively preventing stock adhesion and buildup.
Air-cushion headbox hold an irreplaceable position in the papermaking industry, thanks to their unique “air-cushion pressure stabilization” principle. Our email: leizhanpulper@gmail.com
