2400mm 40-60tpd Kraft Paper Making Machine

The paper machine adopts air-cushion headbox, the forming part is formed by three-layer wire, the press section adopts three vacuum suction devices, one vacuum press roll and two jumbo rolls, and adopts hydraulic pressurization system. The drying section adopts single-tooth box transmission and square box type frame. The paper machine uses a semi-closed hood and an all-digital inverter control system

Main Equipment of Paper making machine:

Paper Machine Wire Section
At the wet end of the paper machine sits the headbox, which distributes a uniform jet of watery stock. The liquid falls onto the wire or forming fabric. Beneath the wire, foils (short for hydrofoils) remove water and improve fibre uniformity, ensuring that the fibres weave together in a tight mat. The wire passes over suction boxes that vacuum out the water, leaving a soft mat of pulp that forms the paper sheet, also known as the paper web. By now the wire has travelled 30-40 meters. In a couple of seconds, the water content has dropped to 75-80%, and the web has lost its wet sheen.

Paper Machine Press Section
The next stage of water removal consists of passing the paper web through a series of nip rollers that squeeze the water out of the pulp mat. This pressure also compresses the fibres so they intertwine to form a dense, smooth sheet. At this stage, the water content has reduced to between 45 and 55%.

Paper Machine Drying Section
The paper web now travels through an enclosed space containing a number of steam-heated drying cylinders. They are warmed up to 130ºC using steam heat to ensure that the paper is now 80 to 85% dry. Wet sizing solution is now applied to the paper in order to add a thin layer of starch to the surface. Starch contributes to stiffness and the bonding of the fibres within the sheet of paper. After the sizing is applied, the paper passes through another set of heated drying cylinders. In all, the paper web may travel 400 meters through the dry end. In the process, it will lose roughly 93% of its water.

Paper Machine Finishing
To give the containerboard a smooth and glossy surface to optimise it for printing, the paper passes through a set of smooth rollers, which can be hard or soft, that press the paper, embossing a smooth face on the paper surface.

Paper Machine Winding
After completing its 500-metre journey, the paper exits from the paper machine and is automatically wound onto a jumbo reel, which can weigh 50 tonnes and be up to eleven metres wide. The jumbo reel is lifted by crane to a nearby winder, where the paper is unwound and cut into smaller rolls as required by the customer.

Main Parameters of Kraft paper making machine:

Main products	Fluting paper Corrugated Paper Testliner Paper Kraft Paper Duplex Board Paper
Test liner Ration	100-400g / m2
Capacity	40-60t/d
Net paper width	2400mm
Gross paper width	2460mm
Working speed	120-160m / min
Design speed	200 m / min
Gauge	3400 mm
Roll of dynamic balance	G2.5
Cylinder of dynamic balance	G4
Batch-off roll of dynamic balance	G1.6
Drive mode	AC motor variable frequency speed regulation segment drive
Paper machine layout form	Single layer layout
Pattern	Left hand machine

Dryness of Craft Paper

Paper dryness out of wire part	20-22%
Paper dryness out of press section	44-46%
Before sizing	92%
Paper roll machine	92%
Lateral shrinkage	About 3.5%

Fresh water, clarified water

Requirements	clear, colorless, sand removal
Water pressure	3.0MPa, 2.0MPa, 0.5MPa
PH value	6-8

Power Supply

AC voltage	high pressure,380/220V
Control point pressure	220/24V
Frequency	50HZ

Paper Machine Buying Guide

In order to recommend paper machine and make detailed technical proposal for you as soon possible ,please tell us
the following technical parameters:

(1)what kind of paper do you want to produce?
(2)what kind of raw material you will use?
(3)how many tons do you want to produce per day(24hours)?
(4)what is the output paper width of jumbo roll?--mm;
(5)What is the output paper weight(thickness)?--gsm.

Thanks for your cooperation!