RU190865U1 - FLEXOFORMA - Google Patents

Abstract

Flexoform, which has on its surface a relief layer with protrusions and spaces, consisting of at least two parts: an informative part with printing elements and a damping part that does not carry information separated from the informative part of the flexoform by an additive technology using a 3D printer of thermoplastic polymer compositions, the damping part of the flexo form does not carry information made of a thermoplastic polymer composition of greater durability than the informative part of flexophore we are with printing elements. The damping part of the flexoform does not carry information made using a 3D printer from a thermoplastic polymer composition and has a base in cross section that expands in the direction opposite to the printing surface of the flexoform. 1 hp f-ly, 2 ill.

Description

The field of technology to which the proposal applies

The invention relates to the field of printing, and more specifically, to the device printing plates for flexography, made of non-metals and different materials.

The level of technology

Known elastic printing plate for flexography, which has projections and gaps on its surface, characterized in that to improve the transfer of the ink layer by increasing the local pressure in the printing elements, the working surface of the protrusions has open microcell, the size of which is less than the width of flexographic lines. [RF patent №88 606, IPC B41N 1/12, published. 11/20/2009, Byul. No. 32].

The closest in technical essence and purpose is the flexo plate device, which has projections on its surface and gaps in which the relief layer consists of two parts: the informative part with printing elements and the damping part that does not carry information, separated from the informative part of the flexo form. The damping part is made as a single unit with a part of the information-carrying form, has a variable height and an arrow shape, with the sharp end pointing towards the informative part with the printing elements and in the direction of movement of the form [RF Patent 88 606, IPC B41N 1/12, published, 20.11. 2009, Bull. No. 32].

When printing, the plate cylinder and the printing plate approach or move away from each other, respectively, in the absence or presence of flexographic plates located between them. The transition from the printing element to the gap, as well as on the line connecting the edges of the form, is accompanied by a shock load on all elements of the kinematic chain, including the flexo form. In order for a new touch to occur as close as possible to the beginning of the working surface of the flexo plate printing element, a damper is formed in the relief layer, and a smooth touch is achieved, according to the known shape device, by performing a damper with certain mechanical characteristics only due to its variable height and dimensions in the direction of movement.

Manufacturing technology forms for flexographic printing includes the following main operations:

- preliminary exposure of the reverse side of the photopolymerizable flexographic plate (analog) from one of a photosensitive polymeric material;

- the main exposure of the mounting of the photoform (negative) and the photopolymerizable plate in the exposure setup;

- processing of a photopolymer (flexographic) copy in a solvent (leaching) or thermal (dry heat treatment) processor;

- drying the photopolymer form (solvent washout) in a drying device;

- additional exposure of the photopolymer form in the exposure setup;

- additional processing (finishing) of the photopolymer form to eliminate the stickiness of its surface.

Exposure of the back side of the plate is the first step in the manufacture of the mold. It is a smooth illumination of the back side of the plate through the polyester base without the use of vacuum and negative. This technological operation increases the photosensitivity of the polymer and forms the basis of the relief of the required height.

A disadvantage of the known device of the printing flexo form is the complexity of the manufacturing technology and the impossibility of imparting to the damper optimum mechanical characteristics and increased wear resistance by making it from polymeric materials that differ from the materials of the printing elements.

Essence of the sentence

The technical task to be solved by the utility model is to simplify the manufacturing technology and increase the durability of the printed flexo plate.

The technical problem is solved by the fact that flexographic form, which has on its surface a relief layer with protrusions and spaces, consists of at least two parts: the informative part with printing elements and the damping part that does not carry information separated from the informative part of the flexo form by an interval, according to the proposal , made by additive technology using a 3D printer from thermoplastic polymer compositions, the damping part of the flexoform does not carry information made from thermoplastic polymer compositions Olsha wear resistance than informative part with flexo printing elements.

The damping part of the flexoform which does not carry information is made using a 3D printer from a thermoplastic polymer composition and has a cross-sectional base that expands in the direction opposite to the printing surface of the flexoform.

The utility model is illustrated by device diagrams.

FIG. 1 - Longitudinal (in the direction of motion) flexo plate cross section

1 - polymer plate plate;

2 - printing elements of the informative part of flexographic forms;

3 - damping part of flexo form;

FIG. 2 Layout on the flexoform of the damper and printing elements

1 - polymer plate plate;

2 - printing elements of the informative part of flexographic forms;

3 - damping part of flexo form.

Example 1

The flexoform (Fig. 1), consisting of a polymer plate 1, having on its surface a relief layer with protrusions (2), spaces and a damper (3), consists of two parts with different mechanical characteristics. The damper has a trapezoidal base with a cross section extending into the depth of the plate, made by additive technology using a 3D printer made of polyurethane of increased durability of the Flex brand with a Shore A surface hardness of 70. The projections, i.e. The printing elements are made together with the plate plate by additive technology using an Easy Flex 3D polyurethane printer with a Shore A-55 surface hardness.

Example 2. The flexoform of example 1, but the damper is made by additive technology using a 3D printer made of polyurethane of increased wear resistance of the RABBER brand with a Shore A surface hardness of 90, has the shape of a “month” (FIG. 2) encompassing sharp edges with both sides of the printing elements.

Claims (2)

1. Flexoform, which has on its surface a relief layer with protrusions and spaces, consisting of at least two parts: an informative part with printing elements and a damping part that does not carry information separated by an interval from the informative part of the flexographic form, characterized in that additive technology using a 3D printer from thermoplastic polymer compositions; the damping part of the flexoform does not carry information made of a thermoplastic polymer composition that is more durable than inform tive of the flexo recording element. 2. The flexo plate according to claim 1, characterized in that the damping part of the flexo plate has a base in cross section that expands in the direction opposite to the printing surface of the flexo plate.

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