Roller type ink jet stenciling method and device

Abstract

The invention provides an ink jet stenciling device, which comprises a frame used for supporting the whole device, a transmission part for transmitting power to the whole device, a roller and a nozzle group, wherein in the stenciling process, a printing plate is pressed and attached to the roller so as to rotate at a constant speed with the roller; and the nozzle group can move linearly along theaxial direction of the roller; and in the printing process, the nozzle group continuously moves to print on the printing plate, and the roller rotates the printing plate multiple circles simultaneously.

Description

technical field [0001] The invention provides a roll-type ink-jet plate-making method and device. Background technique [0002] In the technical field of printing plate making, the plate making process of the current inkjet plate making output equipment is as follows: the image information to be output is represented by a four-color or spot color bitmap after rasterization, color separation, and screen processing, and then The inkjet plate-making output device records the image information represented by the four-color or spot-color bitmap onto the CTP (computer-to-plate) printing plate to realize the reproduction and duplication of the image information. [0003] The printing plate is usually an aluminum alloy printing plate with a thickness of 0.15-0.30mm. According to different usage occasions and requirements, the size can be selected or determined by yourself. For example, for a printing plate of a certain type, the size is 785*1030, the maximum printing area is 715*10...

AI Technical Summary

Problems solved by technology

However, this flat inkjet platemaking method has some disadvantages when dealing with large-area printing plates:

[0005] 1. Flat inkjet plate making requires a large area of ​​heating body to heat the printing plate, and the uneven heating will be caused by the inconsistent installation and manufacturing process of the heating body

[0006] 2. The flatness of the printing plate and the printing plate placement platform is very high. If the flatness is not enough, the distance between the nozzle group and the flat plate will not be fixed. There may be a difference of tens of microns on a plate, which will affect the printing effect.

[0010] 1. Step error, step error may be caused by many factors, due to step error, there will be horizontal stripes in the movement, and the inertial effect caused by the weight of the mechanical structure is an important factor that causes step error to affect printing accuracy factor

[0011] 2. The stepping method will generate vibration. Stepping needs to go through multiple acceleration and deceleration processes. This process will generate vibration. If the weight of the nozzle group box increases, it will relatively reduce some vibrations, but it will increase inertia. If the nozzle group If the weight of the cabinet is reduced, the vibration will be increased and the inertia will be reduced, but both cannot be avoided at the same time

[0012] 3. From the point of view of control, using a motor to control intermittent stepping requires a motor of better quality to ensure a suitable moving speed and moving distance, and the price of this kind of motor is generally higher

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