Double Layer Kraft Paper Machine
Double layer kraft paper machine is mainly used for making cardboard and corrugated base paper. It consists of headbox, wire section, press section, front drying section, oblique surface sizing machine, back drying section, calender section and reel section.
Headbox: Two sets of open headbox, corresponding to top layer, bottom layer. It controls and stabilizes the sizing of pulp by controlling the gas pressure in the headbox.
Forming section: Double layer includes top layer and bottom layer. The main components consists of breast roll , forming board, dewatering board, vacuum box, composite roll, suction couch roll, wire drive roll, wire guiding roll and paper machine framework. Top layer and bottom layer are both respectively equipped with a forming wire.
Press section: Including first press and second press. The first press is K-type composite press with vacuum suction roll, which also equipped with one rubber coated metal roller, one vacuum press roll and one stone roll. The second press is MG press with upper & lower rubber coated metal rolls and upper & lower felts. These two presses are both equipped with wire guiding roll and felt suction box, and they are pressurized by the hydraulic cylinder pressure.
Front drying section: Φ1500/Φ1800 dryer drives in group and is equipped with wire guiding roll , dry wire and closed gas hood.
Oblique surface sizing machine: One surface chrome-plated metal roller and one rubber coated metal roll. It is pressurized by corrugated gas tire pressure.
Back drying section: Φ1500/Φ1800 dryer drives in group and is equipped with wire guiding roll, dry wire and closed gas hood.
Calender section: Double roller calender, the upper and lower rollers are metal rollers. Its pressurized way is the corrugated gas tire pressure.
Reel section: Pneumatic horizontal reel. Its pressurized way is cylinder pressure.
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