CN1004754B - Method and apparatus for the mfg. of a screen roller - Google Patents

Abstract

The present invention relates to a method for the manufacture of a loose screen-plate cylinder. Indentations forming a pattern are displayed on the cylindrical outer surface of a roller. The method comprises the steps: firstly, the upper surface of a smooth-wall load bearing roller, namely a hollow thick-wall roller or a solid roller, is sheathed with a thin-wall screen which is then tightly sheathed on the roller. The present invention also relates to an apparatus using the method, the apparatus comprises the load-bearing roller with a fluid passage, and the screen can be sheathed on the periphery of the load-bearing roller or can be taken off from the load-bearing roller.

Description

The manufacture method of anilox roll and device

The manufacture method of the relevant a kind of roller of the present invention has a kind of depression (being so-called anilox roll) that forms figure on the cylindrical outer surface of this roller.Anilox roll has a thick cyclinder or a solid metal cylinder in the ordinary course of things, in its surface with the additional half tone figure of a kind of suitable technology.This technology increases a hard wear-resistant layer then for example as using brayer on the half tone figure.These rollers all must satisfy very high required precision aspect geometry and fine finishining and when centering, thereby are very expensive.Because the result who uses, will wear and tear in the surface with the passage of time, and can occur damaging, and must go back to factory then or carry out overhauling of high price by special unit.This heaviness and flimsy roller freight is big, and the roller of repairing will be through using for a long time again.In storehouse, deposit standby roller and then need to do very big investment.

The present invention is intended to propose the not method of the anilox roll of these shortcomings of tool of a kind of manufacturing.According to the present invention, a hollow heavy wall roller or solid roller (so-called bearing roller) are at first used in reaching of this purpose, on it a thin cylinder shape screen cloth are pushed up, then this screen cloth tightly are attached to above the bearing roller.Rely on this method, just can obtain the thin screen cloth of a kind of usefulness and be fixed on light wall bearing roller anilox roll on every side.This anilox roll can for example be used for the hectographic printing patient in order to evenly to be coated with printing ink on another roller bearing.

Formerly the attached layer with an impermeable fluid covers, and when screened port is stopped up, just can obtain a real advantage of the present invention.When being enclosed within screen cloth on the roller later on, between bearing roller and screen cloth, supplying with a pressure fluid, screen cloth is swollen, be beneficial to the action of pushing sleeve.The supply of laying the back pressure fluid that finishes just stops.If the fluid non-permeable formation is attached to the inboard of cylindrical screen, just anilox roll is easy to dismounting so.In this case, whenever can put screen cloth or leg under.

When the attached layer of seepage flow body not is placed on the outside of screen cloth, must impermeable fluid layer be taken off after appropriate in that screen cloth is put, to obtain former conceivable anilox roll.Can also make it not seepage flow body to temporary transient obstruction of screened port (mesh).At every turn take off, screen cloth temporarily need be become impermeable fluid for just screen cloth.When the skin (referring to screen cloth) of anilox roll through after a while use and when wearing and tearing, can old screen cloth be severed, take off from bearing roller, can not take the new screen cloth that a lot of times will meet the needs of then and be placed on the bearing roller.

The relevant device of realizing said method of another aspect of the present invention.Comprise with a hollow heavy wall roller or solid roll and remove to embody bearing roller.According to principle of the present invention, the difference of this device is: at least one front surface of bearing roller, have a radial passage at least in the upper shed of the neighboring of bearing roller, an interface is arranged in order to be connected with source of pressurised fluid.This pressure fluid uses air mostly, but also can use liquid.Rely on this fluid, just can be enclosed within thin cylinder shape screen cloth or nethike embrane reputation forme on the bearing roller, or take off from above.

In the embodiment of a use heavy wall roller, the two ends of this roller respectively provide a back shaft.The every part that a disc-shape is arranged is squeezed in the respective end of roller.There is several holes the radial passage, and the axial passage of the similar number in its inner terminal and disc part communicates, and a passage in another disc part has the interface of the pressure fluid that needs.Two discs partly make the internal layer that can remove or the cylindrical shape nethike embrane reputation forme of outer non-permeable formation, are utilized a pressure fluid layer between above-mentioned cylinder and the nethike embrane reputation forme, cylindrical shape is praised forme put on bearing roller or take off.

But also may screen cloth tightly be enclosed within on the light face bearing roller with a diverse ways.In this case, use is a kind of screen cloth (nethike embrane reputation forme) of having given potential fold tension force.The diameter of this screen cloth will be a bit larger tham the diameter of above-mentioned roller, after being enclosed within screen cloth on the bearing roller, heat-treat screen cloth, discharges fold tension force, and screen cloth is tightened on bearing roller.

Fig. 1 is for realizing the longitudinal sectional drawing of the employed first kind of device of method of the present invention.

Fig. 2 is the modification of Fig. 1 device left part.

Fig. 3 represents that another kind of device is by the identical longitudinal sectional drawing than small scale.

One in order to realize method of the present invention and to use the hollow heavy wall drum-shape bearing roller 1 of device of the present invention as can see from Figure 1.The outside chromium plating of this roller, or cover the thin chromium sleeve pipe 2 of an atresia, dot among the figure.This roller can be erect then and place, axis 3 is in vertically, as shown in Figure 3.Cover reputation forme or screen cloth 4 on this bearing roller 1 must reinforcing make the last firmly tight attached bearing roller 1 of this screen cloth.Screen cloth 4 is upright, and is consistent with runner 1.In each embodiment of Fig. 1-3, the installation of screen cloth utilizes pressure fluid (most air of using) to carry out.

For this purpose, stifled the closing of first eyelet, the attached layer of for example attached not seepage flow body that can remove with cylindrical screen 4.There is back shaft 5,6 at the two ends of roller 1, are squeezed into 7,8 li of the cylindrical shape parts of roller respective end.This 7,8 part can be against a circle ring 9 on the roller inner surface.One end of bearing roller 1 has some radial holes 10.These holes communicate with the axial passage 11 of 7 li of disc parts in the upper shed of the neighboring of roller.Each this passage 11 has a cecum on the corresponding front surface of roller, or a plug 12 is arranged.The end (openend) in addition of passage 11 and the inner space 13 of bearing roller 1 link to each other.On the disc part 8 of the roller other end, have an axial passage 14 at least, one end and space 13 connect, and the other end links to each other with a screw thread tube head.This screw thread tube head 15 can pass through a flexible pipe not shown in the figures, links to each other for source (also not shown) with pressure fluid.Pressure fluid is many with compressed air.

Be installed in the diameter of the screen cloth 4 on the bearing roller, should be able to tightly be enclosed within on the bearing roller.For the ease of screen cloth 4 is installed on roller 1, roller has to be conical slope slightly on the outer end beyond the opening 10.When screen cloth 4 is pushed on ramp portion, opening 10 is hidden.Then pressure fluid is supplied with in space 13 by tube head 15 and passage 14, the screen cloth 4 of (sealing) is expanded a little, on bearing roller, continue to push forward in order to screen cloth.Pressure fluid has dual role, and the first expands screen cloth 4 slightly, and simultaneously when screen cloth is mobile on bearing roller, plays lubricated effect.

After the action that pushes is finished and pressure fluid can stop for linking just of source, later fluid releases, screen cloth 4 just tightly has been enclosed within on the bearing roller.After this, impervious skin is removed (for example using ablution), original anilox roll has just been made.

Screen cloth or removing of forme 4 of reputation can be carried out with various distinct methods.If do not plan usefulness again, just the reputation forme can be severed.Wearing and tearing or damaged the reputation forme and just taken off in this way.But, when still available screen cloth is changed mutually, just need to note in advance, added the layer that adds of seepage flow body not in the inside of reputation forme.Screen cloth can also make it tool with the method that eyelet is stopped up does not have permeability, for example with squeegee or brush coating roller etc.Have only at this moment, could use to be essentially the method that in the narrow space between bearing roller and the screen cloth, charges into pressure fluid, screen cloth is removed.

In a kind of modification of Fig. 2,, a circular trough 16 is arranged along the neighboring of disc part 7.Just can simplify by the connection between these condition passages 11 and the opening 10.

The device of Fig. 3, special character are that the disc part 7 of an installing ring 17 against back shaft 5 arranged.The front surface of ring and roller 1 forms a circlet shape interval or the line of rabbet joint 18, is equivalent to the radial passage 10 in Fig. 1 and Fig. 2.Installing ring 17 has an axial passage 19 at least, has interface 20 to be connected for the source with pressure fluid above.It is conical that the neighboring of ring 17 is, so the installation of nethike embrane reputation forme 4, can be identical with the explanation of Fig. 1.

Pointed as preamble, do not adopt the installation method of described fluid power or strength, can also use the inside that the nethike embrane reputation forme of potential fold tension force is arranged.This reputation forme can freely push away and be put on the bearing roller, and the centre is gapped slightly, by heat treatment it is tightened then to be fixed on this roller.

For this method is described, we can see an additional fineness the 10-500 line/centimetre screen cloth after, can be made into required various anilox roll.The thickness of screen cloth or nethike embrane reputation forme 4 is between the 65-80 micron, and the infiltration percentage of eyelet is 20-30%.Inside and outside non-permeable formation can be removed, and also can temporarily be added on the screen cloth 4, can make with the polyvinyl acetate coating.The pressure fluid of using (using air) can have 4 atmospheric superpressures more, and maximum pressure is about 6 atmospheric pressure.

Claims (8)

1, a kind of method of making roller, roller on its columniform outer surface by by the figure (being so-called anilox roll) formed of depression, its characteristics are, a hollow heavy wall roller or solid roll (being so-called bearing roller) are at first arranged, there is a thin wall cylindrical screen cloth to be pushed to above its appearance, this screen cloth tightly is enclosed within on the bearing roller roller.

2, as the method for claim 1, its characteristics are, the material of at first additional a kind of impermeable fluid, close the eyelet of screen cloth is stifled, so when laying screen cloth later on, can between bearing roller and this screen cloth, supply with a kind of pressure fluid, make screen expansion, be beneficial to pushing away of screen cloth and put action, stop the supply of pressure fluid then.

3, as the method for claim 2, be characterized in, the material of seepage flow body not be placed on the inboard of cylindrical screen.

4, as the method for claim 2, be characterized in,, eyelet (mesh) stopped up, make screen cloth not have permeability with the material of polyvinyl acetate and so on.

5, as the method for claim 1, be characterized in,, lay after the end of operation, mentioned strain is discharged with heating with a screen cloth of when system is selected, having given potential fold tension force.

6, carry out claim 2, the device that 3 or 4 method is used, its bearing roller is a hollow heavy wall roller or a solid roll, be characterized in, bearing roller (1) is at least on an one front surface (5), have a radial passage (8) at least, be opened on the neighboring of this bearing roller, have a joint (13) to communicate for the source with pressure fluid.

7, as using the device of hollow heavy wall roller in the claim 6, be characterized in, there is back shaft (5 at the two ends of roller (1), 6), axle has disc part (7,8) tightly to be enclosed within on the respective end of roller, there is some thoraxes hole (10) radial passage, and the axial passage (11) of the similar number on its inner terminal and disc part (7) links to each other, and the interface (15) of above-mentioned pressure fluid is partly arranged on the passage (14) on (8) in another disc.

8, as the device of claim 6, be characterized in, at least at an end of bearing roller (1), slightly conical installing ring (17) is arranged, form a narrow annular gap (18) with corresponding front surface, above-mentioned space forms a radial passage, and installing ring has an axial passage (19) at least in this passage, joint (20) is equipped with, in order to connect with source of pressurised fluid.

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