A Fourdrinier paper machine generally has seventy or eighty rubber rolls. There are many types of press rolls, which can be divided into Rubber Press Roll ,Grooved Press Roll , Jumbo Rubber Press Roll, Jumbo Blind Drill Press Roll, Vacuum Suction Press Roll , Press Suction Couch Roll , Suction Pickup roll ,Dryer Felt Roll ,Breast Roll ,Wire Guide Roll, Drive Wire Roll , Suction Touch Roll ,Couch Roll and etc.
Rubber/Grooved Press Roll for Paper Mill
Max Working Speed : 2000m/min Maximum Diameter: 1600mm Maximum Face Length: 14000mm
Rubber Press Roll is more important to provide good elasticity and ease the pressing effect of the upper press roll on the wet paper and felt, thereby prolonging the service life of the felt and reducing the "compression" of the wet paper.
The elastic encapsulated lower roller can also give the two rollers good contact and uniform dehydration effects, and compensate for the high error of the lower pressure roller.
The rubber hardness of the rubber roller in the production of general paper is usually 70 to 90 Shore hardness. Rubber rollers used for each press in the press section.
Jumbo rubber Press Roll /Blind drill Jumbo Press Roll
Max Working Speed : 2200m/min Maximum Diameter: 1600mm Maximum Face Length: 120000mm
Jumbo Press roll usually refers to a nip composed of pressing rollers which a diameter of more than 1000mm. It is often used in the production of corrugated paper, cardboard, and other paper or cardboard with large basis weight.
Compared with ordinary presses, it has a wide nip formed by the large-spoke press, the paper sheet can be pressed for a long time in the nip. It can improve the dehydration efficiency, increases the de-watering capacity and paper quantity because of the two-way vertical dehydration design.At the same time, it can also reduce steam consumption in the dryer section and further reduces production costs. The strength and burst resistance of the paper also been improved.
Normally, the paper machine adopts this technology has the feature of high speed, low energy consumption, and good paper quality. Therefore, jumbo pressing technology and equipment have become the first choice in the speed-up and energy-saving of old paper machines and the design of new paper machines.
Vacuum Suction Press Roll
Max Working Speed : 2000m/min Maximum Diameter: 1300mm Maximum Face Length: 10000mm
Vacuum suction press roll is mostly used in medium and high speed paper machines.
The function of the vacuum chamber is only to suck the air in the shell holes. The thicker the roll shell, the more air volume is sucked. Therefore, the use of high-strength metal to make a vacuum suction press roll with a thin roll shell is beneficial to improve the efficiency of press dehydration. The vacuum pressure roller shell is covered with rubber with a thickness of 30-40mm. The advantage of encapsulation is to make the pressure distribution uniform, reduce the abrasion of the felt, and increase the pressure of the press line. Production practice shows that the axial and circumferential center distance of the holes on the vacuum pressure roller is smaller, and the number of holes is larger, which can significantly improve the dehydration effect of the vacuum pressure roller, thereby effectively eliminating the embossing phenomenon and extending the service life of the felt.
Suction Touch Roll / Couch Roll / Wire Guide Roll / Drive Wire Roll /Pickup Roll/ Breast Roll
Max Working Speed : 2000m/min Maximum Diameter: 1300mm Maximum Face Length: 1200mm
Suction pick-up roll usually have double vacuum chambers, its first chamber use for take the wet paper web from the net, the second vacuum chamber use for picking the wet paper closely with the felt to avoid being throwing out because of the centrifugal force. High demanding for synchronicity of transmission.
Suction Touch roll Mainly pairing use with Yankey, and high demanding of coating to the temperature.
Wire Guide Roll ,Breast Roll, Drive Wire Roll and Couch Roll are suitable for the wire section of ordinary paper machine, board paper machine and packaging paper machine.
The wire guide roll and drive wire roll are mainly used in the wire section of board paper machine and packaging paper machine. They can correct, support or adjust fabrics and paper webs.
The wire guide roll can introduce the fabric or paper web into the wire. Depending on the function and installation location, they can be dragged to run, or they can be installed with their own driving device. On the contrary, the driving roller has supporting and driving functions. They can also perform control and tension adjustment tasks.
Technical Parameters of Paper Machine Roll
| Elements of Press roll : Shell, Journal, Bearing House, Bearing ,etc |
| Shell : |
Cast Iron or Stainless Steel |
| Journal: |
Cast Steel or nodular Cast Iron |
| coating: |
Rubber or PU and Blind Drill |
| Bearing: |
SKF or FAG, etc |
| bearing house: |
Gray Cast Iron or Nodular Cast Iron or Spheroidal Graphite Cast Iron |
Elements Of Vacuum Suction Press Roll :
roll body, vacuum box(single or double chamber), bearing house on DS and TS, shower pipe, air tube, regulating valve, pneumatic tyre, seal strip. |
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