What are the steps of using Flexo printing machine?

Flexo printing machine has the advantages of high printing speed, low cost, environmental protection, high production efficiency and easy operation and maintenance. It is widely used in corrugated boxes, liquid packaging, paper cups, paper bags, labels, napkins and other fields.

How to detect the radial runout error of the central impression cylinder in the Flexo printing machine?

How to detect and judge the forward and reverse angle of the closed scraper of Flexo printing machine?

What is the role of the rewinding part in the Flexo printing machine?

How to detect the radial runout error of the central impression cylinder in the Flexo printing machine?

The method to detect the radial runout error of the central impression cylinder is as follows:

Install a metal roller at the position where the plate roller is installed to replace the inflatable shaft of the commonly used plate roller.

A dial indicator with a magnetic base is installed on the surface of the metal roller, and the magnetic base is directly attached to the surface of the roller.

Lightly touch the contact of the dial indicator to the surface of the central impression cylinder and adjust it to the zero position.

Rotate the central impression cylinder one round and observe the maximum value of the dial indicator pointer rotation.

Perform a 5-point test on the entire width to determine the radial runout error on the surface of the central impression cylinder.

How to detect and judge the forward and reverse angle of the closed scraper of Flexo printing machine?

The printing unit of the Flexo printing machine is arranged around a central impression cylinder. Taking a classic 8-color unit as an example, the rotation direction of the first 4 sets of plate rollers is opposite to the direction of rotation of the last 4 sets of plate rollers, and the rotating direction of the meshed rollers is also opposite. The squeegee is closely attached to the anilox roller, and the squeegee installed in the opposite direction with the rotation direction of the anilox roller is what we call a reverse squeegee. The commonly used method for judging the angle of the scraper is: along the rotation direction of the anilox roll, make a tangent at the contact point between the scraper and the anilox roll. If the angle between the scraper and the tangent is less than 90°, it is a positive scraper; greater than 90° It is a reverse scraper. The angle of the forward scraper is generally 50°～60°, and the angle of the reverse scraper is generally 140°～150°.

What is the role of the rewinding part in the Flexo printing machine?

The printed and dried web material in the Flexo printing machine needs to be rewinded for storage or subsequent processing. In order to ensure the accuracy of printing registration, obtain a printing material roll with uniform elasticity, neat end faces, and regular foreign aid contours, the rewinding parts are equipped with tension adjustment and control devices. In order to shorten the downtime, some Flexo printing machines are equipped with multiple rewinding parts to change rolls without stopping the machine.

ZHEJIANG GREENPRINT MACHINERY CO.,LTD is an established manufacturer of high speed flexo printing machine for the outdoors for more than ten years. We work with customers from design to completion to ensure that all technical requirements are met by you.