Water-based ink gravure printing drying device and system

Abstract

The application discloses a water-based ink gravure printing drying device, which has the advantages of high drying efficiency and precise drying. In addition, the application also discloses a system comprising the water-based ink gravure printing drying device. The water-based ink gravure printing drying device comprises a drying air box and an air port controller. The drying air box has an air outlet surface, a plurality of air outlets extending in the transverse direction are formed in the air outlet surface from top to bottom, a plurality of air guide flow channels arranged from top to bottom are arranged in the drying air box, the air guide flow channels are communicated with the air outlets, the flow rates of the plurality of air guide flow channels continuously decrease from top to bottom, the air port controller is installed on the air outlets, and the air port controller divides the air outlets into a plurality of air control ports which can be independently opened and closed.

Description

Technical Field

[0001] This invention relates to the field of printing, and more particularly to drying apparatus, systems, and methods for water-based gravure printing. Background Technology Gravure printing involves directly pressing ink from recessed pits onto a substrate. The tonal range of the printed image is determined by the size and depth of these pits. A gravure printing plate consists of individual pits corresponding to the original image and its surface. During printing, ink fills the pits, and the ink on the plate surface is scraped off with a doctor blade. Pressure is maintained between the plate and the substrate, transferring the ink from the pits to the substrate, thus completing the printing process.

[0002] Water-based inks are now widely used. However, the main solvent of water-based inks is water, which is less volatile and has a slower drying speed compared to traditional solvents. Currently, high-pressure air is generally used to blow air onto the surface of the printed matter for drying. However, it has been found that although this method can dry the ink, the drying efficiency is not high, and it cannot be individually dried for a specific printed matter, resulting in poor versatility. Furthermore, high-pressure air with excessive pressure can cause the uncured water-based ink to bleed, resulting in blurred printed patterns and affecting the overall printing speed.

[0003] Therefore, there is an urgent need for a water-based ink gravure printing drying device and system with high drying efficiency and precise drying capability to overcome the above-mentioned defects. Summary of the Invention

[0004] The purpose of this invention is to provide a drying apparatus for water-based ink gravure printing with high drying efficiency and precise drying capability.

[0005] Another objective of this invention is to provide a water-based ink gravure printing drying system that offers high drying efficiency and enables precise drying.

[0006] To achieve the above objectives, the water-based ink gravure printing drying device provided by the present invention includes a drying air box and an air outlet controller. The drying air box has an air outlet surface, and multiple air outlets extending laterally are opened from top to bottom on the air outlet surface. The drying air box is provided with multiple air guide channels arranged from top to bottom, and the air guide channels are connected to the air outlets. The flow velocity of the multiple air guide channels decreases continuously from top to bottom. The air outlet controller is installed at the air outlet, and the air outlet controller divides the air outlet into multiple independently switchable air control ports.

[0007] Preferably, the airflow channel includes a bend, and the number of bends in multiple airflow channels increases from top to bottom.

[0008] Preferably, the multiple air guide channels include a first air guide channel, a second air guide channel, a third air guide channel, and a fourth air guide channel arranged from top to bottom. The second air guide channel contains more bends than the first air guide channel, the third air guide channel contains more bends than the second air guide channel, and the fourth air guide channel contains more bends than the third air guide channel.

[0009] Preferably, the bent portion is a corner bend structure, an arc bend structure, a U-shaped bend structure, or a wave-shaped bend structure.

[0010] Ideally, the air outlet surface should have a curved structure.

[0011] Preferably, the drying air box is provided with a connecting channel that communicates with each air guide channel, and the drying air box is provided with an air inlet that communicates with the connecting channel.

[0012] Preferably, the air vent controller includes a plurality of air deflectors arranged side by side in the horizontal direction, and the air deflectors can be opened and closed independently.

[0013] Preferably, the air outlet controller also includes a driver, the drying air box has a structural cavity, the driver is installed in the structural cavity, the baffle is hinged to the drying air box, and the driver drives the baffle to open or close the corresponding air control outlet.

[0014] Preferably, the wind deflector includes a lower end plate aligned with the air control port and an upper end plate away from the air control port. The upper end plate and the lower end plate are connected to form a bent structure. The actuator includes a permanent magnet and an electromagnet. The permanent magnet is installed on the upper end plate, and the electromagnet is installed in the structural cavity. The electromagnet and the permanent magnet are aligned. When energized, the electromagnet and the permanent magnet have the same polarity, so as to drive the lower end plate to close and shut the air control port.

[0015] To achieve the second objective mentioned above, the present invention provides a water-based ink gravure printing drying system, comprising the aforementioned water-based ink gravure printing drying device, a blower, an electric heating box, and a traction device. The outlet of the blower is connected to the inlet of the electric heating box, and the outlet of the electric heating box is connected to the air inlet of the drying air chamber of the water-based ink gravure printing drying device. The traction device is located above the drying air chamber and is used to traction the printed matter from bottom to top.

[0016] Compared with existing technologies, the water-based ink gravure printing drying device of the present invention can achieve precise drying of printed patterns by opening different air control vents to dry specific areas of the pattern on different styles of printed materials. Furthermore, the lower air guide channel has a faster flow rate, while the upper air guide channel has a slower flow rate. Since the printed material is conveyed from bottom to top, and drying occurs during this process, the moisture content of the pattern continuously decreases. Therefore, the upper air guide channel can discharge air normally, while the lower air guide channel needs to discharge air slowly. Thus, the lower air guide channel blows out slow-speed hot air to dry the pattern, while the upper air guide channel blows out hot air at a normal flow rate to dry the pattern. This accelerates the drying efficiency and allows for precise and rapid drying of specific areas of the printed material.

[0017] It is understood that, since the water-based ink gravure printing drying system of the present invention includes the above-mentioned water-based ink gravure printing drying device, it has the advantages of high drying efficiency and precise drying. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the water-based ink gravure printing drying system of the present invention.

[0019] Figure 2 This is a perspective view of the water-based ink gravure printing drying apparatus of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the water-based ink gravure printing drying device of the present invention.

[0021] Figure 4 This is a front view of the water-based ink gravure printing drying apparatus of the present invention after the wind deflector is hidden.

[0022] Figure 5 This is a schematic diagram of the first airflow channel and the air outlet controller installed in the first airflow channel. At this time, the air outlet controller closes the corresponding air control port.

[0023] Figure 6 This is a schematic diagram of the first airflow channel and the air outlet controller installed in the first airflow channel. At this time, the air outlet controller opens the corresponding air control port. Detailed Implementation

[0024] To illustrate the technical content and structural features of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0025] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the present invention provides a water-based ink gravure printing drying apparatus 100, including a drying air box 10 and an air outlet controller 20. The drying air box 10 has an air outlet surface 11, and the air outlet surface 11 has multiple horizontally extending air outlets 12 from top to bottom. The drying air box 10 is provided with multiple air guide channels arranged from top to bottom, which are connected to the air outlets 12, and the flow velocity of the multiple air guide channels decreases continuously from top to bottom. The air outlet controller 20 is installed at the air outlets 12, and the air outlet controller 20 divides the air outlets 12 into multiple independently switchable air control ports 121.

[0026] During printing, the air outlet 11 is aligned with the printed material, which is then conveyed from bottom to top. Hot air is introduced into each airflow channel. Depending on the style of the printed material, the air outlet controller 20 opens different air control ports 121. Hot air flows out from the opened air control ports 121 and blows onto the printed material, drying the pattern. By opening different air control ports 121 for different styles of printed materials, specific areas of the pattern on the printed material can be dried precisely, achieving accurate drying of the printed pattern. Furthermore, the airflow velocity in the lower airflow channel is faster, while that in the upper airflow channel is slower. The printed material is conveyed from bottom to top, and drying occurs during the conveying process. The moisture content of the pattern continuously decreases. Therefore, the upper airflow channel can blow air normally, while the lower airflow channel needs to blow air slowly. Thus, the lower airflow channel blows out slow-speed hot air to dry the pattern, while the upper airflow channel blows out hot air at normal flow rate to dry the pattern. This can accelerate the drying efficiency of the pattern and also achieve precise and rapid drying of specific parts of the printed material.

[0027] like Figure 3 As shown, the air guide channel includes a bend 13, and the number of bends 13 in the multiple air guide channels increases from top to bottom. Specifically, the multiple air guide channels include a first air guide channel 01, a second air guide channel 02, a third air guide channel 03, and a fourth air guide channel 04 arranged from top to bottom.

[0028] In the embodiments provided by the present invention, the first air guide channel 01 is straight and does not include a bend 13. The second air guide channel 02 includes one bend 13, and the number of bends 13 in the second air guide channel 02 is greater than that in the first air guide channel 01. The third air guide channel 03 includes two bends 13, and the number of bends 13 in the third air guide channel 03 is greater than that in the second air guide channel 02. The fourth air guide channel 04 includes four bends 13, and the number of bends 13 in the fourth air guide channel 04 is greater than that in the third air guide channel 03.

[0029] This invention reduces the flow velocity of the airflow channel by means of the bending portion 13. The more bending portions 13 included, the lower the flow velocity of the hot air output from the channel. Therefore, the flow velocity of the fourth airflow channel 04 is lower than that of the third airflow channel 03, the flow velocity of the third airflow channel 03 is lower than that of the second airflow channel 02, and the flow velocity of the second airflow channel 02 is lower than that of the first airflow channel 01. Preferably, the bending portion 13 can be configured as a corner bending structure. Of course, depending on actual needs, it can also be configured as an arc bending structure, a U-shaped bending structure, or a wavy bending structure.

[0030] like Figure 2 , Figure 3 and Figure 4 As shown, the air outlet 11 has a curved structure. The drying air box 10 is provided with a connecting channel 05 that communicates with each air guide channel. The drying air box 10 is provided with an air inlet that communicates with the connecting channel 05. Setting the air outlet 11 as a curved structure can increase the air outlet area and improve drying efficiency. After hot air is injected into the connecting channel 05 through the air inlet, the hot air can be introduced into each air guide channel.

[0031] like Figure 2 , Figure 3 and Figure 4 As shown, the air outlet controller 20 includes multiple baffles 21 arranged side by side in the horizontal direction, and the baffles 21 can be opened and closed independently. When it is necessary to dry the pattern of a specific part of the printed material, the baffle 21 corresponding to that pattern is opened, allowing hot air to flow out through the air control port 121 opposite to that baffle 21 to dry the pattern. The other baffles 21 block the flow of hot air, preventing it from rushing towards parts that do not need to be dried, reducing the impact on the printed material, avoiding large shaking of the printed material, affecting the drying of the pattern, and preventing the ink from being blown away, thus improving the structural stability of the printed pattern.

[0032] like Figure 3 , Figure 5 and Figure 6 As shown, the air outlet controller 20 also includes a driver. A structural cavity 14 is provided within the drying air box 10, and the driver is mounted in the structural cavity 14. A baffle plate 21 is hinged to the drying air box 10, and the driver drives the baffle plate 21 to open or close the corresponding air control outlet 121. Preferably, the driver can be an electric motor, with its output connected to the baffle plate 21. The motor opens or closes the air control outlet 121 by driving the baffle plate 21 to rotate. Placing the driver in the structural cavity 14 does not obstruct the flow of hot air. Of course, the driver can also be configured with other structures according to actual needs.

[0033] like Figure 5 and Figure 6As shown, in the embodiment provided by the present invention, the wind deflector 21 includes a lower end plate 211 aligned with the air control port 121 and an upper end plate 212 away from the air control port 121. The upper end plate 212 is connected to the lower end plate 211 and forms a bent structure. The actuator includes a permanent magnet 22 and an electromagnet 23. The permanent magnet 22 is mounted on the upper end plate 212, and the electromagnet 23 is mounted in the structural cavity 14. The electromagnet 23 is aligned with the permanent magnet 22. When energized, the electromagnet 23 has the same polarity as the permanent magnet 22, thereby driving the lower end plate 211 to close and shut the air control port 121 (at this time, the state is as follows). Figure 5 (As shown). When the electromagnet 23 is de-energized, the hot air pushes open the baffle 21, thereby opening the air control port 121. The hot air flows out and blows towards the pattern to dry it (the state at this time is as shown). Figure 6 (As shown).

[0034] like Figure 1 As shown, the water-based ink gravure printing drying device 100 of the present invention can be used in the water-based ink gravure printing drying system 1000. The water-based ink gravure printing drying system 1000 of the present invention includes the aforementioned water-based ink gravure printing drying device 100, a blower 200, an electric heating box 300, and a traction device (not shown). The outlet of the blower 200 is connected to the inlet of the electric heating box 300, and the outlet of the electric heating box 300 is connected to the air inlet of the drying air box 10 of the water-based ink gravure printing drying device 100. The traction device is located above the drying air box 10 and is used to traction the printed matter from bottom to top. The blower 200 blows air, which enters the electric heating box 300 and is heated into hot air. The hot air flows into each air guide channel and finally flows out from the air control port 121, drying the pattern on the printed matter. Existing devices can be used for the traction device.

[0035] The following is a brief description of the working process of the water-based ink gravure printing drying system 1000 of the present invention: The blower 200 blows air into the electric heating box 300, where it is heated into hot air. The hot air then flows into the connecting channel 05, and subsequently into the first air guide channel 01, the second air guide channel 02, the third air guide channel 03, and the fourth air guide channel 04, respectively. The hot air flowing out of the first air guide channel 01 has the highest wind speed, followed by the second air guide channel 02, then the third air guide channel 03, and finally the fourth air guide channel 04. The driver is controlled to open the corresponding baffle 21 according to the style of the printed material. At this time, the electromagnet 23 is de-energized, and the hot air blows open the baffle 21, thereby opening the corresponding air control port 121. The hot air is then blown out from the air control port 121 to dry the pattern on the printed material. After the event ends, electromagnet 23 is energized. Electromagnet 23 and permanent magnet 22 have opposite polarities, which drives the wind deflector 21 to rotate and causes the lower end plate 211 to close the air control port 121.

[0036] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are within the scope of the present invention.

Claims

1. A drying device for water-based ink gravure printing, characterized in that: The device includes a drying air box and an air outlet controller. The drying air box has an air outlet surface with multiple horizontally extending air outlets from top to bottom. The drying air box contains multiple vertically arranged air guide channels connected to the air outlets. The flow velocity in the multiple air guide channels decreases progressively from top to bottom. The air outlet controller is installed at the air outlets and divides the air outlets into multiple independently operable air control ports. The air guide channels include bent sections, with the number of bent sections increasing progressively from top to bottom. The bent sections are corner bends, arc bends, U-shaped bends, or wavy bends. The air outlet controller includes multiple horizontally arranged baffles, which can be independently opened and closed. The air outlet surface is aligned with the printed material, which is conveyed from bottom to top.

2. The water-based ink gravure printing drying apparatus according to claim 1, characterized in that, The multiple airflow channels include a first airflow channel, a second airflow channel, a third airflow channel, and a fourth airflow channel arranged from top to bottom. The second airflow channel has more bends than the first airflow channel, the third airflow channel has more bends than the second airflow channel, and the fourth airflow channel has more bends than the third airflow channel.

3. The water-based ink gravure printing drying apparatus according to claim 1, characterized in that, The air outlet surface has a curved structure.

4. The water-based ink gravure printing drying apparatus according to claim 1, characterized in that, The drying air box is provided with a connecting channel that communicates with each of the air guide channels, and the drying air box is provided with an air inlet that communicates with the connecting channel.

5. The water-based ink gravure printing drying apparatus according to claim 1, characterized in that, The air outlet controller also includes a driver. The drying air box has a structural cavity, the driver is installed in the structural cavity, the baffle is hinged to the drying air box, and the driver drives the baffle to open or close the corresponding air control outlet.

6. The water-based ink gravure printing drying apparatus according to claim 5, characterized in that, The wind deflector includes a lower end plate aligned with the air control port and an upper end plate away from the air control port. The upper end plate is connected to the lower end plate and forms a bent structure. The actuator includes a permanent magnet and an electromagnet. The permanent magnet is mounted on the upper end plate, and the electromagnet is mounted in the structural cavity. The electromagnet is aligned with the permanent magnet. When energized, the electromagnet and the permanent magnet have the same polarity, thereby driving the lower end plate to close the air control port.

7. A water-based ink gravure printing drying system, characterized in that, The device includes a water-based ink gravure printing drying apparatus, a blower, an electric heating box, and a traction device as described in any one of claims 1-6. The outlet of the blower is connected to the inlet of the electric heating box, and the outlet of the electric heating box is connected to the air inlet of the drying air box of the water-based ink gravure printing drying apparatus. The traction device is located above the drying air box and is used to traction the printed matter from bottom to top.

Images