Paper Making Machine Vacuum Press Roll For Dewatering Wet Paper Sheets

Rubber covered vacuum press roll in the paper making machine

The vacuum press roll is an important component of the press section of a paper machine and is mainly used for dewatering of wet paper sheets. It comprises a body layer, a surface layer and an inner cavity of the roller shell. The body layer and the surface layer are provided with through holes connected, and the surface layer is provided with a blind hole. The utility model is provided with blind holes between the through holes. Under the premise of not affecting the strength and overall structure of the vacuum press roll, the maximum opening rate of the surface of the vacuum roll is improved, and the dewatering capacity of the vacuum roll is improved. The overall strength of the vacuum press roll is not affected; the reduction of the dewatering flow path allows it to adapt to high vehicle speeds. At the same time, the inner cavity of the roll shell has only one vacuum zone, the roll core structure is simpler, and the manufacturing and use costs are low.

Roll body material 304/316 stainless steel,covered rubber ,hardness SR“A” 90.±2.,rubber layer hole size Ф4mm, double raw sprial hole,The opening rate is 15%, and the roller hole is Ф3mm.
The material of the sealing strip is high-density polyethylene. The compressed air passes through the inner wall of the pneumatic tire to tighten the inner wall of the roller. The pressure of the compressed air is generally 0.5 MPa, and the pressure is reduced as much as possible under the premise of ensuring the seal.

Processing accuracy: the surface of the roller body Ra <1.6μm, the inner surface Ra <3.2μm.