Pisau Printing Doctor Blade – Doctor Blade or commonly called a “pisau printing” (in Indonesia) is an important part in the printing industry. It is called a pisau printing because it looks like a knife used in the printing process.
In the world of printing there are many methods. Printing that uses Doctor Blade, namely rotogravure (gravure) and flexographic (flexo) printing.
In both gravure and flexo printing, doctor Blade has the same function, namely to reduce the amount of ink in the printing cylinder during the printing process.
This is done by wiping the surface of the cylinder of excess ink while the cylinder rotates in the ink supply.
The role of the printing knife in this process is very important, namely to ensure that the distribution of ink (ink dispersion) remains evenly distributed over the entire printing surface (printing film), so that the print quality (color and gradation) for each part of the film is as desired.
Ink scraping process by doctore blade
Doctor Blades are usually made of special carbon steel and heated to a hardness that allows them to wear very slowly. The printing cylinder carries the image to be printed. It is made of a steel core coated with a special copper alloy.
Swedish Steel (Swedish steel) is known as one of the highest quality steel metal materials in the world. Our manufacturing company has made various types of Doctor Blades with various alloy compositions based on Swedish Steel so that Doctor Blade’s performance can reach its best point in terms of base materials.
Our Doctor Blade is of very high quality. In addition, in terms of material, our manufacturing company applies a “100% total quality check” on the straightness level of our Doctor Blade products.
This means that we can be sure that our Doctor Blade products have very low deviation (1 mm bend for every 3 meters length) after the manufacturing process is complete.
We recognize the importance of this, given that the Doctor Blade contact point and the printing cylinder must be in a stable and even condition to provide the best print quality.
In addition to good metal quality, the doctor blade is also given a “coating” which functions as an additional outer layer to protect the Doctor Blade from abrasive/corrosive ink and also physical friction during the printing process which often quickly damages the Doctor Blade.
doctor blade manufacturing process
Therefore, the use of this coating can increase the life-time of your Doctor Blade, so it is hoped that production effectiveness will increase and the frequency of Doctor Blade replacement will be lower.
Replacement of Doctor Blade that is too frequent not only makes you have to incur additional costs to buy more Doctor Blades, but also makes your production process hampered. So, we hope that the use of this coating can improve the performance of your company’s printing process.
The choice of the Doctor Blade edge varies between users of one printing machine and another according to the needs and standard operating procedures of each company. In general, a rotogravure or flexo printing company will choose one or more of the Doctor Blade blade shapes.
Doctor Blades come in a variety of sizes and shapes. Steel blades can range from 0.004” (0.10 mm) to 0.010” (0.25 mm). They can also have a special shape to suit the application.
The shape most often used in both gravure and flexo is called the lamellae tip. This tip is a reduced step area which is typically 0.060” (1.4mm) wide and typically the thickness of the base metal. A typical blade widely used is .006” (0.15mm) thick with 0.003” (0.075mm) thick lamellae.
1.Doctor Blade For Rotogravure
2.Doctor Blade For Flexo
The lamella allows the doctor blade to measure very fine ink cells without leaving ink in cylindrical areas that are not designed for printing. Doctor blades and printing cylinders can range from 7″ to 120″.
Doctor Blade will last from one work shift to several days. There are many factors that affect the life of the bar doctor. Ink type, ink color and cylinder surface can all affect blade life.
Doctor Blade – Knife printing
In addition to all of this, the way the press operator sets the doctor blade angle and pressure on the cylinder can have a major effect on blade and even cylinder life.
Certificate explaining Quality System and Environmental System
• ISO 9001 CERTIFIED, 2015.
• ISO 14001 CERTIFIED, 2015.
If you need Doctor Blade | pisau printing, you can contact us, because we sell doctor blade