Method of making printing plates

 

The invention relates to means for printing, in particular, to methods for producing printing forms for high quality printing. A method of manufacturing a printing form is carried out by a uniform coverage of the substrate with the liquid material ejection of two given points of a layer of this material drops under the action of svetogidravlichesky effect caused by the laser radiation pulses. On the place of the emitted droplets are formed craters, which are arranged on the substrate. Fix thus obtained relief from UV radiation. The technical result from the use of the method is the removal of the complex and costly processing of the substrate of the printing form and purification of liquid material between the grooves on its surface before curing of the material. 4 C.p. f-crystals, 2 Il.

Technical field the Present invention relates to a means for printing. More specifically the invention relates to methods for producing printing forms for high quality printing.

Prior art Known method of making printing plates, consisting in applying to the substrate a liquid material hardened under the influence of svetem pulses of laser radiation and the emission of these points drops of liquid material to obtain on the substrate is subjected to the reproduction of images (RF patent 2088410, 41 F 9/02). In the known method, the liquid material is placed in a multitude of recesses located on the substrate in the form of intersecting parallel rows, with adjacent recesses is placed between them with a step corresponding to a given resolution subject to reproduction of the image.

The disadvantage of this method is the difficulty of manufacturing the substrate, it is necessary to remove the liquid material from all periods between the pits before the processing pulse laser radiation and subsequent curing.

Disclosure of the invention the basis of the invention is to create such a method of manufacturing a printed form, which would eliminate the need for complex and expensive processing of the substrate and the cleaning liquid material between the grooves on its surface before curing of the material.

The problem is solved in that in the method of making printing plates, consisting in applying to the substrate a liquid printing material hardened under the influence of light radiation, the excitation at the given points of this material svetogidravlichesky effects of pulses laser is proizvodstvu image, in accordance with the invention, the entire surface of the substrate uniformly coated with liquid material, cause svetogidravlichesky effect at specified points in the fluid layer, directly adjacent to the substrate, and fix a thin layer-side surface of the crater formed at the departure of every drop of liquid.

With this method of manufacturing a printed form eliminates the need for special surface preparation of the substrate and removal of excess material outside of the points that make possible the emission of droplets of the material.

It is advisable that a thin layer-side surface of the crater formed by the radius of a droplet with the substrate, temporarily fix due to the energy released in its basis upon the occurrence svetogidravlichesky effect.

In addition, a thin layer-side surface of the crater is fixed to a depth sufficient to exclude the wicking material formed at the departure drop of the crater.

It is also advisable that a thin layer-side surface of the crater form a film, the thickness of which exceedsIn addition, during the formation of the crater adjacent to the existing vapor separating the film at the expense of energy, videosmy to eliminate wicking of liquid material on the formed space form elements, without additional sources of energy.

It is advisable that a thin layer-side surface of the crater is fixed to a depth that allows you to vaporize the formed film when creating adjacent crater due to the energy dissipated in the base of the new crater.

This embodiment of the method, without resorting to additional sources of energy in order to expand the area of the gap elements of the printing form.

Brief description of drawings the invention is further illustrated by description of a specific, but not limiting the present invention to the embodiments and the attached drawings, in which: Fig.1 illustrates the proposed method of printing; Fig.2 - section I-I in Fig.1.

The best embodiments of the invention Offer a method of manufacturing a printing form is as follows.

On the plate cylinder 1 of a printing machine (not shown) fixed to the substrate 2, e.g. made from aluminium sheet. During the rotation of the cylinder 1 is applied on a substrate a thin layer of liquid material 3, is capable of hardening under the influence of light radiation. Then a pulse of focused laser radiation quantum generator 4 for a given program the pic is ICOI, svetogidravlichesky effect. Under the action of svetogidravlichesky effect is boiling material in a small volume of liquid in a layer thickness of 0.5-1.0 μm, directly adjacent to the substrate 2. In the boiling liquid will cause tremendous pressure, up to hundreds of atmospheres, causing an explosive kick in above the fluid layer, reinforced by reflection of acoustic waves from the substrate.

The duration of the laser pulse, which occurs svetogidravlichesky effect in small volumes of liquid and emits cold drops, lies in the range from 2 to 100 NS.

Under each action arising pulse pressure of the liquid layer takes off cold drop, forming a crater 5, the side walls of which is fixed a thin film formed at the expense of the energy deposited in the bottom of the crater occurs when svetogidravlichesky effect.

During the formation of the crater adjacent to existing, due to the energy released in its base, dividing both crater film will evaporate, thereby expanding the area of the spacing element.

The relief on the substrate permanently fixed by curing the liquid material under deny.

Industrial applicability the Method of manufacturing the printing plate is designed to print a variety of products, including artistic.


Claims

1. Method of making printing plates, consisting in applying to the substrate a liquid material hardened under the influence of light radiation, the excitation at the given points of this material svetogidravlichesky effects of pulses of laser radiation and the emission of these points drops of liquid material to obtain on the substrate is subjected to the reproduction of images, characterized in that the entire surface of the substrate uniformly coated with liquid material, cause svetogidravlichesky effect at specified points in the fluid layer, directly adjacent to the substrate, and fix a thin layer-side surface of the crater formed at the departure of every drop of liquid.

2. The method according to p. 1, characterized in that the thin layer-side surface of the crater fix when departing from it drops due to the energy deposited in the bottom of the crater occurs when svetogidravlichesky effect.

3. The method according to one of paragraphs. 1 and 2, characterized in that a thin layer side is different at the departure drop of the crater.

4. The method according to one of paragraphs. 1-3, characterized in that the thin layer-side surface of the crater formed by the film thickness is not
5. The method according to one of paragraphs. 1-4, characterized in that during the formation of the crater adjacent to the existing vapor separating film due to the energy emitted at the base of the resulting crater.

 

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