Paper Machine Stainless Steel Dst Kf Doctor Blade Holder

Product Description

Sun Hong Paper Machiney --Doctor Blade Holder

Doctor Blade Holder is a core supporting component for the drying, coating and sizing sections of paper machines, used to accurately fix and adjust the doctor blade, ensuring stable contact between the blade and the dryer cylinder/roll, and efficiently completing roll surface cleaning, coating metering and other operations. Our doctor blade are equipped with positioning cylinders/turnbuckles to accurately control the contact angle and pressing force of the blade, adapting to different paper grades and machine speeds; Adopts high-strength beam and rigid frame with strong anti-deformation ability, ensuring uniform force on the full width of the blade and avoiding local wear; Pneumatic loading/unloading design for quick blade change and lift during shutdown, greatly reducing maintenance costs, and the electric oscillation mechanism extends blade service life. Suitable for various medium and high-speed paper machines and printing & coating equipment, supporting customized specifications according to machine width and working conditions, it is widely used in cultural paper, packaging paper, tissue paper, coated paper and other paper production lines, serving as a core supporting component to improve paper quality, reduce paper defects and stabilize production.

Main Technical Parameters 

Material	Stainless steel, alloy steel, carbon steel (customizable)
Control Mode	Pneumatic control, manual control (optional)
Applicable Blade Thickness	0.5mm – 5.0mm
Working Pressure	0.3 – 0.8 MPa
Working Temperature	≤180°C
Holder Length	Customized according to paper machine width
Application	Dryer cylinder, press roll, calender roll, coating roll, etc.
Surface Treatment	Polishing, anti-rust coating, hard anodizing

Structural Principles of Pneumatic Doctor Blade Holder

The pneumatic doctor blade holder adopts a dual-airbag pneumatic clamping design: the pressure tube clamps the blade, and the opening tube lifts the blade quickly. No bolts are required, ensuring easy blade change, uniform clamping force, and precise control of the contact state between the blade and the roll. It is suitable for various medium and high-speed paper machines and coating equipment, greatly improving production efficiency and reducing maintenance costs.

Key Features & Advantages 

--Pneumatic control design, automatic pressure adjustment, stable and uniform blade pressure, reducing manual operation.
--High-strength alloy steel and stainless steel structure, high rigidity, not easy to deform, long service life.
--Precision machining, tight blade clamping, no looseness, ensuring stable operation of the blade.
--Flexible adjustment of blade angle and pressure, adapting to different working conditions and paper types.
--Good sealing performance, anti-leakage, suitable for high-temperature and high-humidity production environment.
--Quick blade replacement design, reducing downtime and maintenance cost.
--Complete specifications, customizable length, structure and control mode according to paper machine parameters.
--Compatible with various doctor blades (carbon steel, stainless steel, composite material, etc.).

Production Process of Doctor Blade Holder

1.Raw Material Selection & Processing

3.Pneumatic Component Assembly

5.Surface Treatment & Anti-corrosion

Select high-quality carbon steel, stainless steel, aluminum alloy and high-strength wear-resistant accessories. Perform precise blanking, CNC cutting and drilling according to design drawings to create core structural parts such as beams, frames and clamping bases.

 Install core pneumatic components such as pressure tubes, opening tubes, air bags and joints, and conduct air tightness testing to ensure stable air pressure transmission without leakage, ensuring the response speed and stability of blade clamping and lifting.

Perform spraying, electroplating or oxidation treatment on the whole machine to enhance the product's corrosion resistance, wear resistance and aesthetics, adapting to the harsh working conditions of high humidity and dust in paper mills.

2.Welding & Machining

4.Adjustment Mechanism Assembly

6.Finished Product Inspection

 Perform precision welding on core parts to ensure weld strength and sealing; then perform high-precision machining to ensure dimensional accuracy and fit of key parts such as pivot holes, mounting surfaces and guide rails, achieving seamless assembly and smooth operation.

 Assemble drive and adjustment components such as pivot shafts, positioning cylinders, connecting rods and gear motors, complete overall assembly and debug angle and pressure to ensure precise and controllable contact state between the blade holder and the roll surface.

Complete full-function testing including running smoothness, clamping force, oscillation accuracy, air tightness and other indicators; after qualified testing, perform anti-rust treatment and professional packaging to ensure no damage and stable performance of the product during transportation and storage.

Application Scope

SUN HONG doctor blade holder is widely used in various parts of paper machines, especially suitable for:
--Drying section: Dryer cylinder cleaning
--Press section: Press roll surface cleaning
--Coating section: Coating roll, metering roll cleaning
--Calendering section: Calender roll surface treatment 
It is compatible with medium and high-speed cultural paper machines, packaging paper machines, crescent-type toilet paper machines, coated paper machines and various specialty paper machines, supporting the production of cultural paper, kraft paper, linerboard, toilet paper, coated paper, special paper and other paper products.

Globle Exhibition & Globle Customer

If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the future.