SU1546274A1 - Rotary lithographic machine for two-sided printing - Google Patents

Abstract

Roll printing machine for two-sided printing refers to the printing industry. The purpose of the invention is to improve the quality of printing and reduce waste in the marriage. The two-sided roll printing machine contains a tape-feeding device, a printing section including a common printing cylinder and printing cylinders associated with it for printing on the front and back sides of the tape being processed, a drying device, a means of turning the printed on one side of the tape and a register for registering the print from the face and turnover, including register roller. In addition, it has the means of forcing the ribbon from the dryer to the printing cylinder. The register roller is installed in the path of the tape being processed from the means for forcing it to the first contact area of the printing of the reverse side of the tape being processed. The means for forcing the processed tape is made in the form of a friction roller interacting with a printing cylinder. The drying device is equipped with spiral-mounted guide rollers and an endless filling tape, kinematically connected to the printing cylinder, the turning means of the tape sealed on one side being placed in the drying device, and the endless filling tape is mounted on the drying rollers of the drying device and the guide elements of the drying device. reversal tape. 3 hp f-ly, ly, 2

Description

The invention relates to equipment for double-sided printing on tape material and can be used both in printing and other areas of the national economy where such printing is necessary.

The aim of the invention is to improve the quality of printing and reduce waste in the marriage.

FIG. 1 shows the proposed machine, side view; in fig. 2 is a view A of FIG. one; in fig. 3 and 4 is a diagram of the installation in the drying device of the refueling endless belt; in fig. 5 - tape drive device, in a perspective view; in fig. 6 is a diagram of fastening the beginning of the processed tape to the filling conveyor belt; in fig. 7 is a section BB in FIG. 6; FIG. 8 shows the cylinders of the printing apparatus; a section; FIG. 9 - supporting cylinder and friction roller, slit.

The machine contains a printing section with a planetary printing apparatus, including a common printing support cylinder 1 and four printing cylinders 2-5 interacting with it, mounted on cantilever axles. With the flexographic printing method, which exemplifies the invention, the printing cylinders 2–5 are form printing (with the pad and offset printing methods, cylinders 2–5 carry an elastic tire

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intermediate ink carrier from subsequent forme cylinders). The printing apparatus also contains two screened cylinders 6 and 7, mounted in rolling bearings on the walls of the printing section, and four paint rollers 8-11, mounted on cantilever axes in the walls of the section and partially immersed in paint of a corresponding color in troughs 12 and 13.

The composition of the printing section also includes means for forcing the processed tape 14, made in the form of a rubberized friction roller 15 installed in rolling bearings on the section walls and having a friction drive from the supporting (printing) cylinder 1. On the tape path section (printed from the front side) between the friction roller 15 and the contact zone of the printing cylinder 1 (along the belt) with the printing cylinder 3, a register roller 16 is installed.

The spiral dryer of the machine is a chamber with walls 17-20 (Figs. 1 and 2) and a vent pipe 21. On the walls 17 and 18 of the chamber in rolling bearings, there are guide rollers 22 located along the straight helix. Rollers 23–26 of the same design as rollers 22 are mounted on these same walls. Similar rollers 27-34 are installed parallel to walls 17 and 18, with roller 28 spring-loaded and tensioned and together with rollers 27 and 29 placed in the chamber.

In the drying device in the lower horizontal plane, two swivel rods 35 and 36 (FIG. 5) are mounted, fixed to the walls 17 and 18 at an angle of 45 °. The pivot bar 35, together with the rollers 24 and 27, forms the means of turning the processed lensh, set on one side, to be printed on the reverse side.

On rollers 22 (but their middle), swivel bar 36 and rollers 28, 29, 30, and 33, an infinite belt 37 (shown by a dotted line), which is a filling conveyor, is installed. The conveyor belt is pressed to the roller 30 by a freely rotating rubberized roller 38. Toothed rollers 30 and 31 are attached gears, kinematically interconnected by a toothed wheel 39. The supporting (printing) cylinder 1 and the roller 31 are connected with an endless thin-film belt 40 to a tension roller ( not shown)

The machine also contains a tape feeding device, including a roll holder 41, guides 42 and rollers 43 and a brake (not shown).

Cylinders 1, b and 7 (Fig. 8 and 9) are mounted in bearings, 44 on the walls 45 of the printing section. Each of the cylinders 2-5 is mounted on an eccentric axis 46, which, in turn, is inserted into an eccentric

0

five

five

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five

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the sleeve 47 and fastened it with a nut. Each of the eccentric bushings 47 is installed in the openings of the walls 45 and through a system of levers 48 is connected to a pneumatic actuator. Thus, cylinders 2-5 have two degrees of freedom for adjustment in two contact zones, and a pneumatic actuator serves for switching on and off the printing pressure. To drive the cylinders, gears 49, 50 and 51 are provided, the gear wheel of the rasterrow cylinder 6 (7) being connected to it via an overrunning clutch 52. Each of the rollers 8, 9 (10, 11) is kinematically connected with the corresponding rasterized cylinder 6 ( 7) gear wheels 53 and 54 and mounted on a cantilever eccentric axis 55 with the ability to control the pressure in the zone of its contact with the cylinder 6 (7).

A pulley 56 is mounted on the shaft of the support cylinder 1 to drive the machine. When the brief support cylinder is stopped for driving the rasterized cylinders 6, 7 and the paint rollers 8-11, there is a separate drive from the pulley 57. In this case, the formers cylinders 2-5 are turned off by pneumatic actuator. To dry the paint between the contact zones along the arc of the cylinder, a device 58 can be provided.

The machine works as follows.

The tape 14 is spread from the roll 59 (the unsealed lecta is indicated with the position 14, sealed on one side with the sleeve 14a, and sealed on both sides with the position 140; and, passing sequentially along the rollers 42, 43, 23 and 34, enters the printing machine, the friction roller 15 and the printing (supporting) cylinder 1. In it, it is successively sealed with two inks applied to it by printing (plate) cylinders 2 and 4 of the left cantilever group (as viewed from the side of the drying unit). and 10 paint from troughs 12 and 13 is fed to rasterized cylinders b and 7, which for-1 rolls on the shapes of cylinders 2 and 4.

The tape 14a is sealed on one side by the rollers 29 and 26 enters the drying device and passes through the spiral-mounted rollers 22 (do not touch them with their freshly printed side), and then through the swivel bar 35, on which it turns 45 ° and then the rollers 33 , 32 and 15, skirting the register roller 16, is again fed (already inverted and shifted parallel to itself) to the right side of the printing (reference) cylinder 1, where it is analogously printed with two colors on the reverse side by means of cylinders 3 and 5.

After sealing from the reverse side, the tape 14e, through the rollers 27 and 24, goes back into the drying unit, rounding the rollers 22 and not touching them with a freshly printed reverse side. Then on rollers

60 and 61 enters the winding device and is wound onto a roll 62.

The ink register is controlled in a known manner by signals from a non-stroke print sensor (not shown) and by moving the register roller 16 to the corresponding value in one direction or another.

Filling the belt 14 is carried out at a reduced filling speed of the machine mechanized. From the roll 59, the tape 14 outside the drying device is held manually to the belt 40, to the lower branch of which is attached, for example, with adhesive tape 63 (Fig. 6 and 7). Further, the belt 40 (with the onslaught off) passes the ribbon 14 through the printing (support) cylinder 1, after which the onslaught in this group of cylinders can be turned on and printed on.

Due to the fact that the printing cylinders are set to a cantilever, the pressure in each of the contact zones of the print is regulated independently of each other in accordance with the inevitable errors of manufacture

front side at this reduced speed. After exiting the printing unit 20 of each of the printing plates, which ensured the processing tape 14a, the print quality was disconnected, the belt 40 was again and manually held again. The proposed implementation of the drying rollers 30, 27 and 24. After bending, the roller device allows significant mechanics 24, the tape 14a is connected to the same machine and tape the filling of the tape in the machine and performed 63 with the filling tape 37, which, 2R, in the process of printing on the reduced one, conducts the treated tape through all v-speed without smearing the image (which faces 22 drying device. Before it takes place in the well-known spiral twist rod 35 (tape 14a again (s)). This entails additional dinging from the refueling tape 37 and hand-reducing the number of defects at each order (through the respective opening machines. In addition, the arrangement of a portion of the walls of the drying chamber) directs both streams of the treated tape (carried along rollers 33, 32, 15, 16, 1, 29, 26 and the drying of the seal from the face and the turn) on one and the same again connects to the endless flax of the same rollers of the spiral drying unit 37, which is similar to the above described technique (on the right and to the left of the filling strip 14s (onslaught printing from a working conveyor) leads to equality of their speed, it may already be switched on after the emergence of out-rhes, resulting in the stabilization of the tape 14 from the printing machine) by the temperature of the tension of the tape in the drying unit to the rollers 22 in parallel with the which entails additional

Claims (4)

1. Roll for double-sided machine device, printing section including a common printing cylinder and printing cylinders interacting with it for printing on the front and back sides of the tent being processed, drying device, means For uninterrupted operation for 50 Expand Rota, the machine can be sealed on one side for a long time, and the register mechanism for registering is additionally equipped with a set of print-face and rotation kits, including a twisting and reeling device. Tog-register roller, characterized in that, and the beginning of a ribbon prepared by a new company, in order to improve print quality and reduce a roll in a known manner, is connected with the rejection of waste into scrap, it has the means of a tape of a previous roll. In this case, b55 forcing the tape from the moment of pasting the glueing site due to the onslaught of the drying device to the printing cylinder and the corresponding groups of cylinders of the printing unit, and the register roller is mounted on the track unit by sequentially switching off the processed tape from the tool. long movement before first contact 0 five As mentioned earlier, the presence in the machine of the means of forcibly moving the belt from the drying device to the printing cylinder, which can be made as an independent driving friction pair placed in front of the printed contact area, and is not limited to the version described above, as well as setting the register roller between the means for forcing the tape to move and its sealing zone allows to significantly improve print quality and reduce waste to waste by reducing the time transient elimination of non-typing. Due to the fact that the printing cylinders are set to a cantilever, the pressure in each of the contact zones of the print is regulated independently of each other in accordance with the inevitable errors of manufacture 0 of each printing plate, which provides an improvement in print quality. The proposed embodiment of a drying device allows a machine to be significantly mechanized to be refilled in the machine and performed during the printing process at a reduced speed without smearing the image (which is spiral dryers). This entails an additional reduction in the number of defects at each refueling machine. In addition, the location of both threads of the tape being processed (when drying the printing from the face and the turn) on the same rollers of the spiral drying device (to the right and left of the filling conveyor) results in equality of their speeds, which results - tensioning the tape in the drying device, which entails additional (supporting) cylinder. Claims of the invention comprising a tape feeding device The fact that the filling tape is infinite is kinematically associated with the printed rny) cylinder. Claims of invention containing tape-feeding device 1. Roll for double-sided machine (supporting) cylinder. Claims of the invention comprising a tape feeding device rTRn CRUSHED / W ppwnuin RW nmuaKvnvm nfiiiiHi device, printing section including a common printing cylinder and printing cylinders interacting with it for printing on the front and back sides of the tent being processed, drying device, means printing area of the back side of the tape being processed. 2. A rolling machine according to claim 1, characterized in that the means for forcing the treated tape are made in the form of a friction roller interacting with a printing cylinder. 3. The rolling machine according to claim i, characterized in that the printing cylinders are mounted console. 4. The roll machine according to claim 1, characterized in that the drying device is provided with guide rollers mounted in a spiral and an endless filling tape, kinematically connected with the printing cylinder, the turning means sealed on one side of the tape being placed in the drying device, and endless the filling tape is mounted on the guide rollers of the drying device and the guide elements of the belt reversal means. 1 // // ЩМ 36 35 1 Om to Z9 L 3 / tl 55/50 43 50 TO 37 / CEHJ 23 SG AP 35 t t t Fi.Ts 36 K In the u / iu winder the next line module Q SS Sl (01 Tpizj ЈE 74j SCH5G / F ACis hi 9-en 3 / 75 , DCL ij r / frZ29t-9I FIG. 9