Headbox for Paper Machine

The basic task of a headbox is to provide a good prerequisite for the formation of paper sheets, that is, to evenly distribute the paper material along the width direction of the paper machine, ensuring uniform pressure distribution, speed distribution, flow distribution, concentration distribution, and fiber orientation controllability and uniformity; Effectively disperse pulp fibers, prevent fiber aggregation, and provide and maintain stable sizing head and pulp to mesh speed ratio according to process requirements.

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Product Description

Headbox

Specifically, the basic functions of a headbox are manifested in five aspects:

1. Provide a uniform and stable ejection flow to the entire width of the paper machine, avoiding lateral flow, no directional tributaries or longitudinal streaks;

2. Provide a stable lip plate with geometric dimensions that meet the requirements, unaffected by temperature, pressure, and lip opening degree;

3. Form a fiber suspension with minimal flocculation and good dispersion;

4. Provide a control method that can meet the process requirements for horizontal quantitative distribution, drop point, spray angle, and spray speed;

5. Provide convenient measures to keep the headbox clean and easy to operate and maintain.

Application

lt's suitable for the paper machine with working speed 80-280m/min as the requested design.

Features

1.The pulp level in the box is used to control the speed of online pulp (pulp speed), which is usually controlled by adjusting the height of weir plate in the box

2.Equipped with dial gauge for fine tuning.

3.Paper web Lateral directional difference is士1%-2%

4.lt consists of cone duct cloth paste, organic glass, spiral hole diffusion step, before the rectifier roll overflow, the upper lip plate adjustment and upper lip plate spinner indicator.

Headbox for Paper Machine

Key parameters

Adaptive speed : 80-280M/min (designed on requirements)

For example: 1800/200 Open Type Headbox

Paper kinds	Kraft paper, fluting paper
Raw material	wood pulp, waste paper
Working speed	90-180m/min
Design speed	200m/min
Quantitative	100-190g/㎡
Spout width	2100mm
Pulp inflow consistency	0.4%-0.8%
Dryness of finished paper	93%
Beating degree	20-50°SR
Diameter of breast roll	D400
Headbox bottom rail gauge	2700mm
Machine type	Left hand machine