Water-based ink drying device for gravure printing
By using the design of partitions and guide rollers in the aqueous ink drying device, the air outlet distance and wind power are adjusted, and the problems of false drying and slow drying speed are solved, thereby achieving more efficient water-based ink drying and printing smoothness.
Patent Information
- Application Number
- CN202420994445.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-09
AI Technical Summary
The existing water-based ink drying devices tend to cause false drying in the process of increasing the drying speed, affecting the drying quality of the printed materials, and insufficient drying speed.
A water-based ink drying device including a fan, an air heater and an oven is designed. By providing a partition and a guide roller in the oven, the printed material is formed into an inclined section and a horizontal section using the upper and lower inlets and outlets, and the distance of the air outlet is adjusted. and wind, avoid false drying and improve drying speed.
It effectively alleviates false drying phenomenon, improves the drying speed of water-based inks, ensures the drying quality of the printed materials, and levels the printed materials through guide rollers, avoiding wrinkle problems caused by ink drying.
Smart Images
Figure CN222202022U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ink drying, and in particular relates to a water-based ink drying device for gravure printing. Background Art
[0002] When the gravure printing machine is printing, the entire surface of the plate cylinder is inked, and the ink on the blank part of the plate is scraped off with a scraper, leaving the ink on the image part. Then the paper is passed and the impression cylinder is pressed on the back of the paper, so that the ink in the concave part is directly transferred to the paper surface. Finally, the printed products are stacked or rewound in the paper collection part, and the printed paper needs to be dried by a drying device.
[0003] Due to environmental protection requirements, current inks generally use water-based inks, but water-based inks dry slowly and have high performance requirements for drying devices. Most existing drying devices use methods such as increasing air pressure and wind speed to make water-based inks dry quickly and increase printing speed. However, the faster wind speed at the beginning easily forms a dry film on the ink surface, hindering the evaporation of water inside, causing a false drying phenomenon, and affecting subsequent ink scraping operations. In order to alleviate the false drying phenomenon, there are currently gradient-set air outlets with different calibers to dry the water-based ink on the printed matter step by step. However, the wind speed does not change significantly, but only changes the air volume at different positions, which will reduce the drying speed. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a water-based ink drying device for gravure printing, which not only alleviates the false drying phenomenon but also improves the drying speed.
[0005] The utility model provides a water-based ink drying device for gravure printing, comprising: a fan, an air heater and a drying oven connected in sequence;
[0006] The oven is provided with a partition and a guide roller, the partition is provided with a plurality of air outlets, the guide roller is provided below the partition, an inlet and an outlet are respectively provided on both sides of the oven, the inlet and the outlet are staggered up and down, the printed matter enters the oven from the inlet and is transmitted by the guide roller out from the outlet, so that the printed matter forms an inclined section and a horizontal section which gradually approach the partition.
[0007] Optionally, at least two lifting mechanisms are provided at the bottom of the oven, the guide roller is provided on one of the lifting mechanisms to adjust the distance between the guide roller and the partition, and an auxiliary roller is provided on the other lifting mechanism.
[0008] Optionally, the lifting mechanism includes a lifter and a mounting seat rigidly connected to an execution end of the lifter, and the guide roller is rotatably connected to both ends of the mounting seat.
[0009] Optionally, the lifter is an electric cylinder or an oil cylinder.
[0010] Optionally, both ends of the guide roller are embedded and slidably connected to the inner wall of the oven.
[0011] Optionally, the plurality of air outlets are divided into two symmetrically arranged groups, and the guide roller is arranged directly below the symmetry lines of the two groups of air outlets.
[0012] Optionally, the distance between the guide roller and the partition is 10-50 cm.
[0013] Optionally, the edge shape of the air outlet is elliptical or diamond-shaped.
[0014] Optionally, a cold dryer is provided between the fan and the heater.
[0015] Optionally, a branch pipe bypassing the cold dryer is connected between the fan and the heater, and a valve is provided on the branch pipe.
[0016] The beneficial effect of the utility model is that the device enables the printed matter to form inclined sections and horizontal sections at different positions with different distances from the air outlet through the guide rollers, the inlet and the outlet staggered up and down when passing through the interior of the oven. The printed matter that has just entered is the inclined section, which is far away from the air outlet, so that the water-based ink thereon can be prevented from being blown by the drying wind and being subjected to a large wind force, and the formation of a dry film on the surface of the water-based ink can be reduced, so that the water evaporates smoothly, and the air outlet volume is large, which improves the drying speed, while the printed matter in the horizontal section close to the outlet is close to the air outlet and is subjected to a large wind force, so that the water-based ink can be dried quickly and thoroughly; the guide roller also has the function of leveling the printed matter, so as to solve the problem that the printed matter is wrinkled due to ink drying. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of the structure of the drying device provided by the utility model;
[0018] Figure 2 A schematic diagram of a local structure of an oven provided by the utility model;
[0019] Figure 3 The top view structure diagram of the partition provided by the utility model Figure 1 ;
[0020] Figure 4 The top view structure diagram of the partition provided by the utility model Figure 2 .
[0021] In the figure: 10, fan; 20, air heater; 30, oven; 31, partition; 311, air outlet; 32, inlet; 33, outlet; 34, guide roller; 35, lifting mechanism; 351, lifter; 352, mounting seat; 36, auxiliary roller; 37, guide rail pair; 40, main pipeline; 41, branch pipe; 42, valve; 50, cold dryer; 60, printed matter; 61, inclined section; 62, horizontal section. DETAILED DESCRIPTION
[0022] like Figure 1-4 As shown, the utility model provides a water-based ink drying device for gravure printing, comprising: a fan 10, an air heater 20 and an oven 30 which are connected in sequence through a main pipeline 40; a partition 31 and a guide roller 34 are arranged in the oven 30, a plurality of air outlets 311 are arranged on the partition 31, the guide roller 34 is arranged below the partition 31, an inlet 32 and an outlet 33 are respectively provided on both sides of the oven 30, the inlet 32 and the outlet 33 are staggered up and down, a printed matter 60 enters the oven 30 from the inlet 32 and is transmitted by the guide roller 34 out of the outlet 33, so that the printed matter 60 forms an inclined section 61 and a horizontal section 62 which gradually approach the partition 31.
[0023] Compared with the prior art, the utility model provides a water-based ink drying device. When the printed matter 60 passes through the interior of the oven 30, the printed matter 60 forms an inclined section 61 and a horizontal section 62 at different positions with different distances from the air outlet 311 through the guide roller 34, the inlet 32 and the outlet 33 staggered up and down. The printed matter 60 has different distances from the air outlet 311 at different positions. The printed matter 60 that has just entered is the inclined section 61, which is far away from the air outlet 311, which can prevent the water-based ink thereon from being blown by the drying wind and being subjected to a large wind force, and reduce the formation of a dry film on the surface of the water-based ink, so that the water evaporates smoothly, and the air outlet volume is large, which improves the drying speed. The printed matter 60 in the horizontal section 62 close to the outlet 33 is close to the air outlet 311 and is subjected to a large wind force, so that the water-based ink can be dried quickly and thoroughly. The guide roller 34 also has the function of leveling the printed matter 60, which solves the problem that the printed matter 60 is wrinkled due to ink drying.
[0024] In one embodiment, Figure 1 As shown, at least two lifting mechanisms 35 are provided at the bottom of the oven 30, and a guide roller 34 is provided on one of the lifting mechanisms 35 for adjusting the distance between the guide roller 34 and the partition 31, and an auxiliary roller 36 is provided on the other lifting mechanism 35; specifically, the two lifting mechanisms 35 adjust the guide roller 34 and the auxiliary roller 36 to be higher than the inlet 32 and at the same horizontal height, so that the printed matter 60 passes through the guide roller 34 and the auxiliary roller 36 to form an inclined section 61 and a horizontal section 62, and the distance between the horizontal section 62 and the partition 31 can be controlled, so that under a certain air output and air pressure, the wind force received by the horizontal section 62 of the printed matter 60 can be adjusted as needed to obtain the best drying speed and quality.
[0025] It should be noted that the inlet 32 and the outlet 33 in this embodiment have a certain height, which determines the adjustable range of the guide roller 34 and the auxiliary roller 36, that is, the adjustable range of the printed matter 60.
[0026] In one embodiment, Figure 2 As shown, the lifting mechanism 35 includes a lifter 351 and a mounting seat 352 rigidly connected to the execution end of the lifter 351, and the guide roller 34 is rotatably connected to both ends of the mounting seat 352; wherein, the mounting seat 352 is in a U-shaped structure, and two bearing seats are arranged on it, and both ends of the guide roller 34 and the auxiliary roller 36 are centrally mounted on the bearings, or in other words, the guide roller 34 itself rotates around the rotating shaft, and both ends of the rotating shaft are mounted on the bearings, and the guide roller 34 and the auxiliary roller 36 are driven to rotate when the printed matter 60 passes. It should be noted that the conveying power of the printed matter 60 is provided by the winding device.
[0027] Furthermore, the lifter 351 is an electric cylinder or an oil cylinder, which provides a stable execution action for the height adjustment of the guide roller 34 and the auxiliary roller 36 .
[0028] In one embodiment, Figure 2 As shown, in order to improve the stability of the guide roller 34 and the auxiliary roller 36, the two ends of the guide roller 34 are embedded and slidably connected to the inner wall of the oven 30, and the two ends of the auxiliary roller 36 are embedded and slidably connected to the inner wall of the oven 30. Specifically, four guide rail pairs 37 are fixedly installed on both sides of the inner wall of the oven 30, and the two ends of the guide roller 34 are rigidly connected to the sliders of two symmetrically arranged guide rail pairs 37, and the two ends of the auxiliary roller 36 are rigidly connected to the sliders of the other two symmetrically arranged guide rail pairs 37; or the two mounting seats 352 supporting and fixing the guide roller 34 and the auxiliary roller 36 are rigidly connected to the sliders of the corresponding guide rail pairs 37, respectively, and the rigid connection methods include but are not limited to screw connection, clamping or riveting.
[0029] In one embodiment, Figure 1 As shown, the multiple air outlets 311 are divided into two symmetrically arranged groups, and the guide roller 34 is arranged directly below the symmetry line of the two groups of air outlets 311; specifically, the two groups of air outlets 311 are separated by a clear spacing, and each group of air outlets 311 corresponds to the inclined section 61 and the straight section of the printed matter 60, respectively, which can reduce interference with drying operations in different areas and improve the drying quality of water-based ink.
[0030] In one embodiment, the distance between the guide roller 34 and the partition 31 is 10-50 cm.
[0031] In one embodiment, Figure 3 and Figure 4As shown, the edge shape of the air outlet 311 is elliptical or diamond-shaped. The analysis is as follows: the hot air is blown out from the air outlet 311 to the surface of the printed matter 60 and diffuses to the surroundings. The edge of the printed matter 60 is not only exposed to direct hot air, but also to diffused hot air. The drying speed of the edge is faster, and the film layer formed by the ink at the edge shrinks faster than the middle part, and the shrinkage rate is also greater, which is easy to wrinkle. The edge of the air outlet 311 is designed to be elliptical or diamond-shaped, so that the middle part of the printed matter 60 is exposed to more direct hot air, so that the water-based ink is dried more evenly and wrinkles are reduced.
[0032] In one embodiment, Figure 1 As shown, a cold dryer 50 is arranged between the fan 10 and the heater, so that the air blown in by the fan 10 is dried and dehumidified, and then heated by the heater and enters the oven 30, so that the water content of the hot air is lower, thereby accelerating the drying speed of the water-based ink.
[0033] Furthermore, Figure 1 As shown, a branch pipe 41 bypassing the cold dryer 50 is connected between the fan 10 and the heater, and a valve 42 is provided on the branch pipe 41; in winter or when the cold dryer 50 is maintained, the throttle valve on the cold dryer 50 is closed and air passes through the branch pipe 41. In other seasons when the air humidity is high, the valve 42 on the branch pipe 41 is closed, the throttle valve is opened, and air passes through the cold dryer 50, thereby improving the adaptability of the drying device.
[0034] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.
[0035] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.
Claims
1. A water-based ink drying device for gravure printing, characterized in that: include: A fan (10), an air heater (20) and an oven (30) connected in sequence; A partition (31) and a guide roller (34) are provided in the oven (30); a plurality of air outlets (311) are provided on the partition (31); the guide roller (34) is arranged below the partition (31); an inlet (32) and an outlet (33) are respectively provided on both sides of the oven (30); the inlet (32) and the outlet (33) are arranged staggered up and down; a printed product (60) enters the oven (30) from the inlet (32), is transported by the guide roller (34), and exits from the outlet (33), so that the printed product (60) forms an inclined section (61) and a horizontal section (62) that gradually approach the partition (31).
2. The water-based ink drying device for gravure printing according to claim 1, characterized in that: At least two lifting mechanisms (35) are arranged at the bottom of the oven (30); the guide roller (34) is arranged on one of the lifting mechanisms (35) for adjusting the distance between the guide roller (34) and the partition (31); and an auxiliary roller (36) is arranged on the other lifting mechanism (35).
3. The water-based ink drying device for gravure printing according to claim 2, characterized in that: The lifting mechanism (35) comprises a lifter (351) and a mounting seat (352) rigidly connected to an execution end of the lifter (351), and the guide roller (34) is rotatably connected to both ends of the mounting seat (352).
4. The water-based ink drying device for gravure printing according to claim 3, characterized in that: The lifter (351) is an electric cylinder or an oil cylinder.
5. The water-based ink drying device for gravure printing according to claim 2, characterized in that: Both ends of the guide roller (34) are embedded and slidably connected to the inner wall of the oven (30).
6. The water-based ink drying device for gravure printing according to claim 1, characterized in that: The plurality of air outlets (311) are divided into two symmetrically arranged groups, and the guide roller (34) is arranged directly below the symmetry lines of the two groups of air outlets (311).
7. The water-based ink drying device for gravure printing according to claim 1, characterized in that: The distance between the guide roller (34) and the partition (31) is 10-50 cm.
8. The water-based ink drying device for gravure printing according to claim 1, characterized in that: The edge shape of the air outlet (311) is elliptical or diamond-shaped.
9. The water-based ink drying device for gravure printing according to any one of claims 1 to 8, characterized in that: A cold dryer (50) is provided between the fan (10) and the heater.
10. The water-based ink drying device for gravure printing according to claim 9, characterized in that: A branch pipe (41) bypassing the cold dryer (50) is connected between the fan (10) and the heater, and a valve (42) is provided on the branch pipe (41).