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Parameter setting before gravure printing

Update time : 2020-11-10

Source : Zhejiang Deguang Machinery Co.,Ltd

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Parameter setting before gravure printing
Before the gravure printing machine is officially started for printing, the gravure printing machine should be adjusted according to the printing process requirements of each product, and a series of printing parameters matching the printing process requirements of the product should be set on the printing machine. Mainly consider the following aspects.
gravure printing machine parameter settings
1. Setting of drying temperature
Before starting printing, the drying temperature of each unit should be adjusted according to the type of printing material, printing speed, graphic area, ink layer thickness, etc. In the high-speed printing process, in order to make the solvent in the ink volatilize quickly after printing and achieve the purpose of drying the ink in time, the setting of the drying temperature is very important. The drying temperature has a great influence on the quality of the product. Too high a temperature will cause the film to shrink and deform; if the temperature is too low, the ink will not dry completely, causing the ink to anti-stick. The heat resistance of various printing materials is very different, and the temperature setting depends on the material. In actual production, such as PVC film, its drying temperature is generally 40~55℃, while OPP film can be 60~75 Dry at ℃.

2. Tension
The general unit type gravure printing machine has four tension controls, namely: unwinding tension, feeding tension, traction tension, and winding tension. They control the printing material to run stably during the process of unwinding, printing, and winding. The more stable the tension, the more stable the printing material and the operation of the components, and the more guaranteed the accuracy of color registration.

The tension control of film printing is more important than paper. The size of the tension adjustment is determined according to the type and tensile strength of the film. For example, the tensile strength of CPP and PE is weak, and the film is easy to stretch and deform, so the tension should be correspondingly smaller, while the tensile strength of PVC, BOPP, etc. The stronger the film, the greater the tension can be. In the case of a certain type of film, the width and thickness of the film are also important factors that determine the tension. A wide film should have a greater tension than a narrow film, and a thicker film has a greater tension than a thin film.

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3. The pressure of the impression cylinder and the plate cylinder
Set the appropriate pressure according to the thickness of the printing material. Generally, the greater the thickness, the greater the printing pressure is required.

4. The circumference of the plate cylinder and the diameter of the impression cylinder
Set the correct circumference of the plate cylinder and the diameter of the impression cylinder according to the printing process sheet, and immediately perform the initial registration of the correction screw.

5. Set the curve of winding tension
In the printing process, the winding tension decreases with the increase of the winding diameter. In order to achieve better winding quality, the current advanced roll gravure printing machine's winding tension change curve can be operated Set by personnel. Generally, several commonly used change curves can be stored in the host for easy selection during production.

6. Reset the balance roller position of each color group

The balance rollers of each color group are set to adjust the patterns between the plates to be non-parallel. Generally, the balance rollers and the guide rollers should be kept parallel to prevent the non-parallelism from affecting the pattern registration.

gravure printing machine parameter settings

As a manufacturer of gravure printing machines, Deguang Machinery is familiar with the parameter settings of various printing equipment. If you want to know more details, please contact us.

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