KNOWLEDGE OF ROTOGRAVURE PRINTING MACHINE

KrishnaEngineering Works is a company based in India that specializes in the manufacturing and exporting of a range of industrial equipment, including rotogravure printing machines. This company offers a variety of models of rotogravure printing machines, including standard and custom-designed machines to meet specific customer requirements. Some of the key features of rotogravure printing machines include:

High-precision engraving technology: We have used advanced engraving technology to ensure that the cylinders used in the printing machines are accurately engraved with the desired image.

Customizable configurations: Rotogravure offers customizable configurations for printing machines, allowing customers to choose the number of colors, printing width and other parameters to suit their needs.

Robust construction: The printing machines manufactured by are made using high-quality materials and are designed to withstand the rigors of heavy use in industrial applications.

Advanced control systems: rotogravure printing machines feature advanced control systems that allow operators to precisely control the printing process and make adjustments on-the-fly to ensure high-quality prints.

Easy to use: Despite their advanced features, the printing machines manufactured are designed to be easy to use and maintain with user-friendly interfaces and simple maintenance procedures.

Overall, KEW is a reputable manufacturer of high-quality rotogravure printing machines that are used by businesses around the world for a variety of industrial applications. 

What is the Rotogravure Printing Machine?

Rotogravure printing is a type of intaglio printing process used for high-volume printing of magazines, newspapers, packaging, and decorative prints. The process involves etching the image onto a cylinder (made of copper or steel), which is then coated with ink. The ink is then transferred onto the paper or other substrate under pressure, creating a high-quality print with sharp, clear images and rich, vibrant colors.

The rotogravure printing machine consists of several key components, including a series of cylinders, an ink system, a doctor blade, and a dryer. The printing cylinders are engraved with the image to be printed, and the ink is applied to the cylinders using an ink system. As the cylinder rotates, the doctor blade removes any excess ink, leaving only the ink that is trapped in the engraved cells. The paper or other substrate is then pressed against the cylinder, and the ink is transferred onto the substrate.

This Machine is known for its high speed, consistent quality, and ability to print on a wide variety of substrates. It is commonly used for printing high-quality images on paper, plastic, and metal surfaces, and is particularly well-suited for printing large quantities of materials. 

Rotogravure printing machine process

The rotogravure printing machine process can be broken down into several steps:

Image preparation: The first step in the process is to prepare the image that will be printed. This may involve designing the image, creating a digital file, and converting the file to a format that can be used by the printing machine.

Cylinder preparation: The next step is to prepare the cylinder that will be used to transfer the image onto the substrate. The cylinder is typically made of copper or steel and is engraved with the image using a diamond-tipped stylus. The depth and spacing of the engraved cells determine the amount of ink that will be transferred onto the substrate.

Ink preparation: The ink used in rotogravure printing is typically a solvent-based or water-based ink that is formulated to adhere to the substrate and dry quickly. The ink is mixed and then loaded into an ink system that will apply the ink to the engraved cylinder.

Printing: Once the cylinder is loaded with ink, the substrate (such as paper or plastic film) is fed through the machine and pressed against the cylinder. The pressure forces the ink out of the engraved cells and onto the substrate, creating a high-quality print. The process is repeated for each color in the image, with each color requiring a separate cylinder.

Drying: After the ink is applied, the substrate is passed through a dryer to evaporate any solvents or water and ensure that the ink adheres to the substrate.

Finishing: Depending on the application, the printed substrate may undergo additional processing steps such as laminating, cutting, or folding before it is ready for use. 

Specifications of rotogravure printing machines:

Web Width: 20" to 80"

Number of colors: 1 - 8 colors

Web Roller: Aluminum Roller or Steel Roller

Web roller: Steel rollers Aluminum rollers or

Machine speed: Up to 250 m/min

Reel diameter: 1000 mm

Cylinder Dia: 100 mm to 800 mm

Unwind shaft: Air shaft, tapper cone with solid shaft

Printing material: aluminum foil, Film, Bopp, poly, paper, aluminum foil, pet, polyester, metalized film, etc.

Infeed unit: Synchronized control

Wed Width: 500 mm to 2050 mm

Unwind/rewind Reel Dia: 1000 mm

Film Thickness: 6 Micron to 300 Micron

Paper Thickness: 20 Gsm to 300 Gsm 

Printing Unit:

Cylinder: The cylinder is the heart of the printing unit. It is typically made of copper or steel and is engraved with tiny cells that hold the ink. The depth and spacing of the cells determine the amount of ink that will be transferred onto the substrate.

Ink system: The ink system is responsible for applying ink to the cylinder. It typically consists of a series of rollers that distribute the ink evenly across the cylinder's surface.

Doctor blade: The doctor blade is a thin, flexible strip of metal that scrapes off any excess ink from the cylinder's surface. This helps to ensure that only the ink in the engraved cells is transferred onto the substrate.

Substrate feed: The substrate feed is the mechanism that moves the substrate (such as paper or plastic film) through the printing machine. It is typically a series of rollers that apply pressure to the substrate, pressing it against the cylinder and transferring the ink.

Dryer: The dryer is used to evaporate any solvents or water from the ink and substrate after printing. This helps to ensure that the ink adheres to the substrate and does not smudge or smear.

Control system: The control system is the brain of the printing unit. It manages all the components and ensures that the printing process is carried out accurately and efficiently. 

In conclusion, a rotogravure printing is a specialized industrial machine that uses engraved cylinders to transfer ink onto a substrate, typically for printing images or designs. The printing process is highly accurate and capable of producing high-quality prints at high speeds and volumes. The machines are used in a variety of industries, including packaging, label printing, and publishing. For more information visit our website: www.krishnaengineeringworks.com or email: kewinquiry@gmail.com.