Fields & Boyd Wet Lap Machine




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Manufacturer: Fields & Boyd
Model No: 805XLPT
Part Number: 8298
Year Manufactured: 1984


Description: Wet Lap Machine, Capacity 400 Tds Tpd, Fields & Boyd Twin Wire Dewatering Press, 2-Meter, (3) Main Presses; 1500 Pli Each, Second Press 2400" Bellows (added In 1988), Cutter Layboy

The wet-lap machine is two meters in width. It is a two section wet-lap. The
primary section is a three-nip press section. The secondary press is a single nip capable of 1500 P.LI. pressure. The drives are Reliance Automax D.C. drives.

Two of the three press nips of the primary section are drive rolls. Both top
and bottom rolls are driven. The secondary press nip rolls are driven
separately with a draw function between the two sections of the machine.
The machine chest, 12 feet x 12 feet high has a capacity of 10,000 gallons. Stock is fed to the machine chest at 6% consistency and mixed with a Lightnin 30 H.P. agitator. A 50 H.P. Allis-Chalmer stock pump with consistency dilution feeds the headbox at 3.5 to 4.0% consistency. The headbox discharges stock between the twin wires supported by four-foot long plastic deckles. From the deckles, the sheet is formed between offset and converging table rolls. The first press rolls are driven, the second press rolls are not driven and the third press rolls are the master roll set. The bottom third press roll (75 H.P.) is the machine speed which all other drives are slaved for speed control Discharge from the primary section is
45 to 48% air dry.

The secondary section is also a twin wire press. It is capable of higher nip
pressures with the 24” diameter bellows loading each side of the press.
Discharge from the secondary is 50 to 52% air dry running bleached Kraft
softwood with a Canadian freeness of 600. The secondary press discharges to the cutter. The cutter is driven by a 25 H.P. D.C. motor, 56:1
Eurodrive gearbox to a 7-1/2 wide poly-v-belt.

The cut sheet is discharged onto a high-speed belt, which throws it on to an elevated conveyor. The height of the conveyor is controlled by a hydraulic scissor lift. At a determined bale height, the bale drops and forks extend to catch the first sheet of the next bale. The bale is conveyed at a right angle to the machine to a weight conveyor and then to a Cranston peg-up conveyor where it is removed by a forklift.