CN204451454U - A kind of offset print is exempted from alcohol edition-0 moistening liquid scraper-type and is cleaned water supply installation - Google Patents

Abstract

The utility model discloses an alcohol-free fountain solution scraper-type cleaning water supply device for a lithographic offset printing machine, which includes a printing plate cylinder, and the printing plate cylinder is rolled and contacted with a plate water roller a, a plate water roller b, and a plate water roller a There is a string water roller in rolling contact with the plate water roller b, a water transfer roller in rolling contact with the string water roller, a water bucket roller in rolling contact with the water transmission roller, a water bucket is arranged below the water bucket roller, and a water bucket is arranged below the water bucket roller. One part is immersed in the water bucket, the water bucket is provided with water pipe a and water pipe b, the end of water pipe a is provided with a water tank, the end of water pipe b is provided with a water tank, and the water tank and water pipe b are connected through a water hole; the edge of the water tank An angle-adjustable scraper is provided, and the scraper is in contact with the string water roller. The utility model enables the dampening solution in the water tank to be individually prepared according to the state of the printing plate to meet the requirements of the printing process and then circulated to the water bucket after being filtered, so that the performance of the dampening solution in the water tank is stable and the continuity of printing production is guaranteed. And the stability of print quality.

Description

Alcohol-free fountain solution scraper type cleaning water supply device for lithographic offset printing machine

technical field

The utility model belongs to the technical field of lithographic offset printing machines, in particular to an alcohol-free fountain solution scraper type cleaning water supply device for lithographic offset printing machines.

Background technique

The structure of the lithographic offset printing machine is the most complicated among the printing machines. Since the printing is completed using the principle of immiscibility of oil and water, each group of printing units has a water delivery device for supplying water to the printing plate. At present, most offset printing machines use alcohol dampening, and the alcohol dampening solution is uniformly supplied by the centralized water supply system. Centralized water supply Because the alcohol in the alcohol wetting liquid is volatile, the water is cooled during the centralized water supply, and the temperature of the wetting liquid is cooled to about 10°C, and then the water is transported to each printing unit through the circulation pipeline. This water supply method has disadvantages: 1. The centralized water supply supplies the same water to each printing unit, which cannot meet the different water quality requirements of different printing units; 2. The ink and other sundries of different printing units are returned along the waterway into the water tank, making the mixing of new and old dampening solutions affect the water quality; 3. The water supply system is complex, and it is necessary to adjust the alcohol concentration and pH value of the dampening solution. With the development and application of the new alcohol-free fountain solution, the fountain solution no longer uses alcohol, but replaces it with non-volatile surfactants. Therefore, the water supply device of the offset printing machine also needs to be updated, and the original cooling cycle wetting The water supply method of the liquid no longer adapts to the new printing conditions. In the existing wetting device, because the wetting liquid is supplied centrally by a water tank, the wetting liquid of each printing unit cannot be replaced due to different printing conditions, and the wetting liquid is recycled during the wetting process, so that the wetting liquid in the water tank The overall liquid is polluted, which is not conducive to stable printing quality.

Utility model content

The purpose of the utility model is to provide an alcohol-free dampening solution scraper type cleaning water supply device for a lithographic offset printing machine, which solves the problem that the water tank in the existing wetting device cannot independently supply the dampening solution to each printing unit.

The technical scheme adopted by the utility model is, a lithographic offset printing machine free of alcohol fountain solution scraper type cleaning water supply device, including a printing plate cylinder, the printing plate cylinder rolling contact has a water roller a and a water roller b, The rolling contact between the water roller a and the water roller b has a string water roller, the water string roller has a water transfer roller in rolling contact, the water transfer roller has a water bucket roller in rolling contact, and a water bucket is arranged under the water bucket roller , a part of the water bucket roller is immersed in the water bucket, the water bucket is provided with a water pipe a and a water pipe b, the end of the water pipe a is provided with a water tank, the end of the water pipe b is provided with a water tank, and the water tank and the water pipe b pass through the water hole Connected; the edge of the water tank is provided with an angle-adjustable scraper, and the scraper is in contact with the string water roller.

The utility model is also characterized in that,

The scraper adopts positive scraper.

The water tank is a sealed water tank.

A filter screen is arranged in the water tank.

The water pipe a is provided with a water volume regulating valve.

A check valve and a water pump are arranged on the water pipe b.

The beneficial effect of the utility model is that, by making each printing unit independently use the water tank, the dampening solution in the water tank can be individually prepared according to the printing plate condition to meet the requirements of the printing process; After the water roller and the water roller contact the water transfer, the scraper scrapes off the remaining dampening solution on the surface of the water roller; by setting a filter in the water tank, the dirt generated during the printing process can be removed, which saves dampening The liquid will not pollute the fountain solution in the water bucket; moreover, the fountain solution in the water tank is not mixed with the recycled fountain solution, which ensures that the fountain solution in the water tank is always fresh; at the same time, the water tank is designed to be sealed, and the water tank The dampening solution in it is not affected by the air, which ensures the stability of printability. The device does not need a cooling system, so it has the characteristics of simple structure, low cost and convenient use.

Description of drawings

Fig. 1 is a structural schematic diagram of an alcohol-free fountain solution scraper type cleaning water supply device for a lithographic offset printing machine of the present invention.

In the figure, 1. printing plate cylinder, 2. plate water roller a, 3. string water roller, 4. water transfer roller, 5. water bucket roller, 6. water pipe a, 7. water volume regulating valve, 8. water tank, 9. water pipe b, 10. check valve, 11. water bucket, 12. water pump, 13. filter screen, 14. scraper, 15. sink, 16. water hole, 17. water roller b.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The utility model is an alcohol-free dampening liquid scraper type cleaning water supply device for a lithographic offset printing machine, as shown in Figure 1, including a printing plate cylinder 1, and the printing plate cylinder 1 is rolled and contacted with a plate water roller a2 and a plate water roller b17 , wherein, the rolling contact between the plate water roller a2 and the plate water roller b17 has the string water roller 3, the string water roller 3 rolls and contacts the water transfer roller 4, the water transfer roller 4 rolls and contacts the water bucket roller 5, and the water bucket roll 5 A water bucket 11 is arranged below the bucket roller 5, and a part of the water bucket roller 5 is immersed in the water bucket 11. The water bucket 11 is provided with a water pipe a6 and a water pipe b9, and a water tank 8 is provided at the end of the water pipe a6, and the water tank 8 is sealed. In the water tank, the water pipe a6 is provided with a water volume regulating valve 7; the end of the water pipe b9 is provided with a water tank 15, the water tank 15 is provided with a filter screen 13, and the water pipe b9 is provided with a check valve 10 and a water pump 12; between the water tank 15 and the water pipe b9 The water tank 15 is provided with an angle-adjustable scraper 14 on the edge of the water tank 15, and the scraper 14 is in contact with the stringer roller 3, and the scraper 14 is a forward scraper.

The working process of the utility model is that the alcohol-free dampening solution is prepared and stored in the water tank 8, and flows into the water bucket 9 through the regulating valve 7 and the water pipe a6, and the water bucket roller 5 rotates to transfer the dampening solution to the water transfer roller 4 , and then passed to the plate water roller a2 through the string water roller 3, and finally passed to the printing plate cylinder 1. After the water roller 3 is in contact with the water roller a2 and the water roller b17, the water roller 3 transmits the fresh dampening solution to the water roller a2 and the water roller b17, and at the same time absorbs the water roller Ink, paper wool and other dirt on the surface of the water roller a2 and the water roller b17. When the water roller 3 rotates with the dirt and passes the scraper 14, the scraper 14 scrapes off the dampening solution and ink paper wool on the surface of the water roller 3, and the scraped dampening solution and ink paper wool flow together into the water tank 15 , filtered by the filter screen 13 and drained into the water pipe b9 by the water hole 16, and then re-injected into the water bucket 12 through the water pump 11 and the check valve 10.

The scraper 14 of the utility model adopts a positive scraper to protect the stringer roller from being hurt, and by changing the angle of the scraper 14 and the pressure with the stringer roller 3, to ensure that the dirt on the surface of the stringer roller is scraped clean.

The check valve 10 of the utility model only allows the filtered dampening solution to flow to the water bucket 12 , and does not allow the dampening solution in the water bucket 12 to flow to the water pump 11 .

Claims (6)

1. An alcohol-free fountain solution scraper type cleaning water supply device for a lithographic offset printing machine, characterized in that: it includes a printing plate cylinder (1), and the printing plate cylinder (1) is rolled and contacted with a water roller a (2) And the form water roller b (17), the form water roller a (2) and the form water roller b (17) roll contact with the string water roller (3), the string water roller (3) roll contact with water transfer The roller (4), the water transfer roller (4) rolls and contacts the water bucket roller (5), the water bucket (11) is arranged under the water bucket roller (5), and a part of the water bucket roller (5) is immersed In the bucket (11), the bucket (11) is provided with a water pipe a (6) and a water pipe b (9), the end of the water pipe a (6) is provided with a water tank (8), and the water pipe b (9) ) is provided with a water tank (15), and the water tank (15) communicates with the water pipe b (9) through the water hole (16); the edge of the water tank (15) is provided with a scraper with adjustable angle and contact pressure (14), scraper (14) is in contact with string water roller (3). 2. The alcohol-free fountain solution scraper type cleaning water supply device for lithographic offset printing machine according to claim 1, characterized in that: the scraper (14) is a forward scraper. 3. The alcohol-free fountain solution scraper-type cleaning water supply device for a lithographic offset printing machine according to claim 2, characterized in that: a filter screen (13) is arranged in the water tank (15). 4. The alcohol-free fountain solution scraper type cleaning water supply device for lithographic offset printing machine according to claim 3, characterized in that: the water tank (8) is a sealed water tank. 5. The alcohol-free fountain solution scraper type cleaning water supply device for lithographic offset printing machine according to claim 4, characterized in that: the water pipe a (6) is provided with a water volume regulating valve (7). 6. The alcohol-free fountain solution scraper type cleaning water supply device for lithographic offset printing machine according to claim 5, characterized in that: the water pipe b (9) is provided with a check valve (10) and a water pump (12).