SU948286A3 - Method and apparatus for transferring covering medium having tendancy to rapid thickening from cell of machine for applying covering medium or from printer to material being processed - Google Patents

Abstract

Procedure with its corresponding device for the transfer of flowable application means from a wetting receptacle, one of whose walls is constituted by a cylinder and which on the output side is closed by a doctor blade, to a support or holder in a machine for coatings or a printing machine, characterized in that the flowable application medium (1) is injected torrentially with known means into the wetting receptacle (4), from the pressure chamber (11, 19) provided with a through opening ( 12, 18) adjustable in its size and in its distance to the cylinder (2, 15) in relation to the application medium (1) and the angle of incidence of the doctor blade, in the region of the line of the doctor blade and against the direction of rotation of the cylinder (2, 15) and is transferred on top of the cylinder (2, 15) serving as the dosing element, directly to the support or holder (3), to a printing mold (20) or to a roller cador (23). *** see image 01 *** see image 02 *** see image 03 *** see image 04

Description

The invention relates to a method of transferring a rapidly thickening fluid coating medium, for example, printing ink, from the trough of a coating machine or printing machine to the material to be processed and a device for implementing this method.

A known method of transfer prone to rapid thickening of the fluid coating medium, mainly printing ink, from the trough of the printing machine to the material being processed, comprising supplying the coating medium under pressure to the surface of the transfer roller, capturing the medium from the trough with the transfer roller and leveling the layer of medium on its surface with a squeegee [ 1].

A device for implementing this method is known, containing a trough, a transfer roller partially placed therein, a pressure chamber with an exit slit for supplying a coating medium under pressure to the surface of the transfer roller and squeegee £ 4}.

In the known technical solution, as a result of the operation of the device on the (transfer roller, fluid residues accumulate, miscible with fresh fluid, as a result of which absolutely fresh paint is not transferred to the product.

The purpose of the invention is to improve the quality of fluid transfer to the material being processed by constantly updating the medium layer on the surface of the transfer roller.

This goal is achieved by the fact that in the method of transfer prone to rapid thickening of the fluid coating medium from the trough of the machine for applying a coating medium or a printing machine to the processed material, mainly printing ink, including supplying the coating medium under pressure to the surface of the transfer roller, capturing the medium from the trough transfer roller and leveling the layer of medium on its surface by means of a squeegee, the medium is supplied under pressure to the surface of the transfer roller in the trough at an acute angle to the surface the transfer roller in a direction opposite to the direction of movement of the surface of the transfer roller, immediately in front of the zone of equalization of the medium layer with a squeegee.

This goal is also achieved by the fact that in the device for implementing the method of transfer prone to rapid thickening of the fluid coating 5 of the medium containing a trough, a partially transporting transfer roller, a pressure chamber with an exit slit for supplying the coating medium under pressure to the surface of the transfer roller and 10 the squeegee, the pressure chamber is placed in the trough, and its exit slit is located in the direction of the direction of movement of the surface of the transfer roller, and the squeegee is mounted on the back wall of the cortex (5th rotation of the roller) and directly behind the exit slit of the pressure chamber.

In this case, the pressure chamber is formed by a partition mounted on the trough CTeH-jg ke, located opposite the squeegee-bearing wall, and a part of the trough located under the partition.

The partition is made adjustable in width and mounted on the wall of the trough with the possibility of a fixed rotation.

In FIG. 1 shows an apparatus for carrying prone to rapid thickening the coating medium flowing from a trough machines for applying Pokrovski * ⁰ hydrochloric medium to the material with the transfer roller having a raster (cellular) surface; in FIG. 2 - the same, but with a smooth transfer roller; in FIG. 3 - location of the device in a printing machine for printing tubes, cans, etc .; in FIG. 4 - the location of the device in the printing apparatus of an offset printing machine. 40

A device for transferring a coating medium (Fig. 1) contains a trough 1, a transfer roller 2 with a raster surface partially placed in it, a pressure chamber Kame-45 ru 3 placed in a trough 1, formed by a partition 5 mounted on the wall 4 of the trough 1 and placed below it trough 1, and the squeegee 6, mounted on the wall 7 along the rotation of the roller 2. The exit slot 8 of the chamber 3 is located opposite the direction of rotation of the surface of the roller 3 to direct the flow of the coating medium at an acute angle to the surface of the roller 2 in the opposite direction The direction of movement of the roller 55 surface 2.

To install the squeegee trough 6 fixed on the wall 7, the trough 1 is mounted between two fixed side walls 9 with the possibility of adjusting the rotation about the axis '10. The partition 5 is made adjustable in width and mounted on the wall 4 of the trough 1 with the possibility of a fixed rotation relative to the pivot point 11, as a result of which the output slit 8 of the pressure chamber 3 can be adjusted both in size and in relation to the surface of the roller 2.

During operation of this device, a coating medium located in the trough with a thickness determined by the position of the doctor blade 6 or the depth of the raster cells 14 is directly transferred to the material 12 to be processed by means of a roller 2 with a raster surface.

A coating medium prone to rapid thickening is also supplied under pressure to the pressure chamber 3 and, flowing through its outlet slot 8 at an acute angle to the surface of the roller 2 in the direction of arrow 13 against the direction of rotation of the surface of the roller 2, is washed out of the cells 14 remaining there after transfer of the coating medium, as a result of which the surface of the roller 2 is freed from unspent media residues and is again covered with a new film of fresh coating medium .. Excessive medium flows back from the trough through the drain pipe d (not shown) in the pressure generator tank.

In the embodiment of FIG. 2 of the device embodiment, the coating medium 15 by means of a transfer roller 2 having a smooth surface, as in FIG. 1 is directly transferred to the material 12, while only part 16 of the coating medium 15 is transferred to the material 12, while the remaining part 17 remains on the roller 2 and is returned to the trough 1. In this embodiment, the transfer of the coating medium it is advisable to set the squeegee 6 radially to roller 2, 'which is achieved by turning trough 1.

In order that the wall 4 of the trough 1 for various positions of the trough 1 is always vertically located, it is mounted on the trough with the possibility of rotation around axis 18.

The pressure chamber 3 (FIG. 2) represents a tubular chamber placed in a trough 1 with a possibility of fixed rotation, having an adjustable outlet slot 8, with the help of which the same working conditions can be obtained as with the partition 5.

In the depicted in FIG. 3 to the printing machine, a coating medium, which is printing ink, is applied from the troughs 1 by means of transfer rollers 2 with a raster surface to the printing plates 19 and from them through the rubberized fabric 20 to the articles 21.

In the depicted in FIG. 4 of the printing apparatus, the coating medium, in the quality of which 65 printing ink is used, is transferred from the transfer roller 2 to the knurling roller 22, transferring it to the offset printing form, with which the ink by means of the offset cylinder 23, forming a printing pair with the printing cylinder 24, is transferred -5 worn on material 12.

Thus, by updating the coating medium on the surface of the transfer roller, the quality of transfer of the coating medium to the material to be processed is improved.

Claims (4)

before the ZONE of the equilibrium level of the cancer, Lem. This goal is also achieved by the fact that in a device for carrying out a method of transferring a fast-thickening fluid coating medium containing a trough, a partially arranged transfer roller, a pressure chamber with an exit slit for supplying the coating medium under pressure to the transfer roller surface and the squeegee, the pressure chamber is placed in the trough, and its exit slit is located opposite to the direction of movement of the transfer roller surface, and the squeegee is fixed on the rear side of the trough along the roller during rotation of the roll dstvenno behind the exit slit of the pressure chamber. In this case, the pressure chamber forms a partition mounted on the wall of the trough, located opposite the squeegee bearing wall and part of the trough placed under the partition. The partition is made adjustable in width and fixed on the wall of the trough with the possibility of a fixed rotation. FIG. 1 shows a device for transferring a quick-thickening fluid coating medium from a trough of a machine for applying a coating medium to a material to be treated with a transfer roller having a raster (cellular) surface; in FIG. 2 - the same, but with a smooth transfer roller; in fig. 3 shows the arrangement of the device in a printing press for printing tubes, cans, etc. in fig. 4 - the location of the device in the printing apparatus offset printing MIGANA. The device for transferring the coating medium (Fig. 1) contains a trough 1, a transfer roller 2 partially disposed therein with a raster surface placed in the trough 1 of a pressure chamber 3 formed by a partition 5 fixed on the wall 4 of the core 1 and and squeegee b, mounted on the main wall 7 along the rotation of the roller 2. The exit slit 8 of the chamber 3 is located opposite to the direction of rotation of the surface of the roller 3 to direct the flow of the coating medium under the sharp angle to the surface of the roller 2 in the opposite direction From the direction of movement of the roller surface 2. To install the trough fixed on the wall 7, the squeegee 6 of the trough 1 is mounted between two fixed side walls 9 with the possibility of controlling the rotation around the axis 10. The partition 5 is made adjustable in width and fixed on the wall 4 of the trough 1 with the possibility of a fixed rotation relative to the turning point 11, resulting in ext. The inlet slot 8 of the pressure chamber 3 can be adjusted both in size and position relative to the surface of the roller 2. During operation of this device, the covering medium located in a trough with a thickness defined by the position of the squeegee b or the depth of the raster cells 14 is through the roller 2. the raster surface is directly transferred to the material being processed 12. The coating medium is prone to rapid thickening, also under pressure is fed into the pressure chamber 3 and, flowing through its exit slit 8 at an acute angle to the surface the roller 2 in the direction of the arrow 13 against the direction of rotation of the surface of the roller 2, elutes from the cells 14 remaining after transferring the coating medium, as a result of which the surface of the roller 2 is freed from unspent residues of the medium and again covered with a fresh film of fresh coating medium. back from the trough through a drain pipe (not shown) to the pressure generator tank. This is shown in FIG. In the second embodiment of the device, the covering medium 15 by means of the transfer roller 2 having a smooth surface, as in FIG. 1 is directly transferred to the material 12, with only part 16 of the covering medium 15 being transferred to the material 12, while the remaining part 17 remains on the roller 2 and is returned to the trough 1. In this variant of transferring the covering medium, it is advisable to set the blade 6 radially to the roller 2, which is achieved by rotating the trough 1. In order for the wall 4 of the trough 1 for different positions of the trough 1 to be always located vertically, it is fixed on the trough with the possibility of rotation around the axis 18. The pressure chamber 3 (FIG. 2} before, he put himself. The tubular chamber placed in the trough 1 with the possibility of fixed rotation, and the powerful adjustable exit slit 8, with which the same conditions of operation can be obtained as with the partition 5. In the printed media shown in Fig. 3, the covering medium is printed the dye from the troughs 1 is applied onto the printing plates 19 and from them through the rubberized fabric 20 onto the products 21 by means of transfer rollers 2 with a raster surface. In the embodiment shown in FIG. 4 to the layout of the printing apparatus, the covering medium, in which print ink is used, is transferred from the transfer roller 2 to the rolling roller 22, which transfers it to an offset printing plate, from which the paint is offset by printing a cylinder 23 that forms printing cylinder 24, transferred to material 12. Thus, the quality of the transfer of the coating medium to the material to be processed is improved by updating the coating medium on the surface of the transfer roll. Claim 1. Method of transferring the fluid coating medium from the machine trough for applying the coating medium or printing machine to the material being processed, mainly printing ink, which involves supplying the coating medium under pressure to the surface of the transfer roller, trapping the medium from the trough transfer tpim roller and alignment of the layer of the medium on its surface by means of a squeegee, characterized by the fact that, in order to improve the quality of the transfer by constantly updating the layer of the medium on the surface its roller, supplying the medium under pressure to the surface of the transfer roller is carried out in a trough at an acute angle to the surface of the transfer roller in the direction opposite to the direction of not moving the surface of the transfer roller, directly in front of the area where the layer of the medium reaches the blade. 2. A device for carrying out the method according to claim 1, comprising a trough, a transfer roller partially disposed therein, a pressure chamber with an exit slit for supplying a coating medium under pressure to the surface of the transfer roller and the blade, which is because the pressure chamber The trough is dimensioned, and its exit slit is located opposite to the direction of movement of the transfer roller surface, and the doctor blade is fixed on the back wall of the trough along the roll rotation immediately behind the exit slit of the pressure chamber. 3. The device according to claim 2, characterized in that the pressure chamber is formed by a partition wall (reproducing on the wall of the trough located opposite the carrying wall of the squeegee, and part of the trough located under the partition wall 4. Device on PP. 2 and 3, characterized in that / that the partition is made adjustable in width and fixed to the wall of the trough with the possibility of fixed rotation. Sources of information taken into account in the examination 1. US patent 3587463, cl. 101-350, 1970 (prototype).