A computer imaging direct plate-making equipment and plate-making method

Abstract

The invention provides computer imaging type direct plate making equipment and a plate making method. The equipment comprises an exposure light source, a print image imaging device and a printing plate carrying device, which are arranged coaxially; the exposure light source is used for irradiating light to cure a photosensitive material loaded on a printing plate; the print image imaging device is used for forming a target image to replace a film, so as to mask the light from the exposure light source, and thus a corresponding exposure image is formed on the printing plate; to improve the exposure efficiency and the plate making efficiency, the print image imaging device is provided with a light guide layer for trimming non-uniform exposure light to uniform parallel light. Due to the introduction of a light homogenizing layer, dependence on a light source is further reduced, and in particular, good plate making precision can be obtained by combination of light sources with different specifications, light sources or spot light sources with different surface luminescence uniformity and line light sources. A plate making process formed by the plate making equipment can adapt to the plate making requirements of high precision and low cost.

Description

Technical field [0001] The invention belongs to the field of printing plate making, and particularly relates to a computer imaging direct plate making device and a plate making method. Background technique [0002] The plate-making process is an important step in the pre-press process. It plays a very important role in the entire printing process and has an extremely important impact on the color, tone and register of the printed matter. With the development of science and technology, the plate-making process has also continued to evolve, from traditional film plate making to wax-spray plate making, ink-jet plate making, to the widely used laser plate making, etc., with the development of computer technology, plate making process gradually Combining them, and continuously developing in the direction of high efficiency, environmental protection and low cost, thus forming the computer-to-plate technology. [0003] The so-called computer-to-plate (ComputertoPlate, referred to as CTP)...

AI Technical Summary

Problems solved by technology

However, this technology has the following disadvantages: 1. The accuracy is not high. As we all know, LED lamps are point light sources, and the array formed by LED lamps is formed by a series of LED light-emitting units arranged at intervals. The light emitted by a single LED lamp is not a completely parallel beam. There is also scattered light in the interval between LED lamps, and the light of a single LED lamp spreads in the form of strong center and weak edge, especially when the distance between the LED lamp and the printing plate is large, the light of the LED lamp located at the edge of the image shines on the Halos are formed on the printing plate, which leads to blurred edges of the exposed graphics, resulting in a decrease in imaging accuracy; 2. High cost, LED arrays, especially UVLED lamps, usually use special semiconductor materials, and the semiconductor materials are processed by lithography of the entire wafer , usually grown by CVD method, the cost is extremely high; 3. Poor fault tolerance, easy to form bad spots in the LED array due to factors such as production and maintenance, that is, individual LED light-emitting units cannot emit light normally, and due to process limitations, it is difficult to replace individual LED particles , so that the whole LED array cannot be used normally

[0014] It can be seen that in the prior art, especially in the widely used CTP and CTcP plate-making processes, there are insurmountable technical obstacles in the existing technical level and solution ideas. Due to technical problems such as high cost, short equipment life cycle and high cost of consumables, it is urgent to change the design idea and provide a new generation of computer plate-making equipment with simple structure, easy maintenance and low plate-making cost

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