What is the function of the doctor blade?
A doctor blade is a mechanical device used to remove excess ink from a printing cylinder. While it removes some ink, it allows some to stay on the cylinder, thus metering the amount of ink that leaves the cylinder.
What are doctor blades made of?
The doctor blade is a relatively cheap and disposable consumable, while the gravure cylinder or flexo anilox is a more expensive component of the press. Typical materials for the blade are steel or polymer: gravure cylinders are normally hard-chrome plated and flexo aniloxes may be chromed or ceramic.
What is doctor blade coating?
Doctor blade coating is a technique used to form films with well-defined thicknesses. The technique works by placing a sharp blade at fixed distance from the surface that needs to be covered.
What is a doctor blade in gravure printing?
In gravure printing, the doctor blade is a steel strip used to remove ink from the outside surface of the gravure cylinder. Although steel is preferred in most gravure applications, plastics are occasionally used, usually in conjunction with a worn cylinder as a means of prolonging its life.
What is lamella in doctor blade?
Standard Doctor Blade. The MDC Standard patented lamella tip doctor blade has been around since the 1970’s. This tip design enhances cylinder life as it delivers consistent tonal values as the blade wears, ideal for short run gravure applications.
How does an anilox roller work?
Don’t Miss Out on this Anilox Roll Training! – YouTube
What is the purpose of the doctor blade in composite manufacturing?
The doctor blade is a crucial component of the flexo printing and gravure printing processes. It removes ink from the surface of the roller so that the intended volume of ink can be transferred.
How do I change Dr blade?
How to change doctor blades on New Edge blade holders – YouTube
How do you set up a Dr blade?
Adjusting the doctor blade – EN – YouTube
How does flexography printing work?
Flexographic printing uses flexible photopolymer printing plates to print high-resolution images on a variety of substrates. These plates, which are made of rubber, are imprinted with a raised image and then wrapped around cylinders mounted on a web press.
What is BCM in anilox roll?
What is BCM of Anilox roller? It is a measure of the volume of ink transfer from the Anilox roll to the photopolymer, expressed in trillion cubic microns per square inch (billion cubic microns per square inch in its acronym in English) – BCM / in².
Why is the anilox roller so important?
The Anilox roller
Anilox rollers are one of the most important elements of the flexo process. The full surface of the anilox roller is engraved with recessed cells and each cell holds a specified volume of ink thus ensuring that a consistent ink film is delivered to the printing plate.
Which product is often made using the doctor blade process?
tape casting
… common tape-casting method is called doctor blading. In this process a ceramic powder slurry, containing an organic solvent such as ethanol and various other additives (e.g., polymer binder), is continuously cast onto a moving carrier surface made of a smooth, “no-stick” material such as Teflon.
How do you clear the ink accumulation on the Dr Blade set?
Clean the chamber – A cleaning routine involves wiping down the chamber with a cloth and flushing with approved cleaning solutions every day to remove ink deposits and particles from the doctor blade and blade clamp.
How do you measure the angle of a Dr Blade?
How to Check Doctor Blade Alignment | Kadant Solutions – YouTube
What are the disadvantages of flexography?
However, flexography also has some disadvantages: Flexography is not a good printing solution for small orders. Although highly automated, the setup of a flexographic printing unit can be very time consuming.
What ink is used in flexography?
The two major types of fluid inks used in flexography are water-base and alcohol-base. Alcohol-base inks are most often used to print on nonabsorbent substrates such as film and foil. Water-base inks most often are used on absorbent substrates such as paper and paperboard.
How do you calculate BCM?
BCM is calculated as the product of FFM and the ratio BCMI / FFMI.
…
| Resistance (R) | See Note (1) |
|---|---|
| Body Cell Mass BCM = a * HEIGHT2 * X / R2 + b * WEIGHT + c * AGE + d | (3) |
| Extracellular Mass ECM = FFM – BCM | |
| Fat Mass FM = WEIGHT – FFM | |
| ECM to BCM Ratio ECM / BCM |
What is anilox volume?
Anilox volume refers to the carrying capacity of an anilox cell, or the amount of ink held in each cell, during Flexographic Printing. It is one of the many factors that determine the amount of ink that is transferred to the print material and therefore has to be accurately controlled and measured.
What is LPI in anilox roll?
Line count. Line count measures the finesse of the pattern on the anilox roll. It measures how many cells are engraved per centimetre or inch. In Europe the standard is LPCM or lines per centimeter. In America, the standard is LPI or lines per inch.
How do you clean a Dr Blade?
Is flexographic printing cheap?
Flexographic Printing
This is a low-cost printing method, and it has progressed much since 1970 after direct laser engraving was introduced.
What are the advantages of flexography?
An advantage of flexography is that is a fast and economical method to print relatively simple designs on stand up packaging. It supports a range of colors. It can be used with water-based inks as well as oil-based inks. Currently water-based inks are popular because of their non-toxicity.
Why is flexo ink so liquid?
Flexographic inks are separated into two classifications: volatile and energy curable. Volatile inks contain a liquid solvent — like water or alcohol — that evaporates and leaves the image on the substrate.
Is flexographic ink toxic?
Food Packaging Applications of ebeam Flexo Ink
Are low odor. Have low extractables. There’s no risk of migration from the photoinitiation process because they are not used. The inks are non-toxic, nonflammable, explosionproof, and totally safe for food packaging applications.