Drying structure of packaging box printing equipment

Abstract

This application relates to the technical field of printing, and in particular to the drying structure of packaging box printing equipment. The drying box features a double-opening drying chamber structure. Inside the drying chamber, a conveyor belt structure clamps and transports cardboard from the top and bottom, moving the cardboard from the input end to the output end. Air delivery chambers are located on the top and bottom of the drying chamber. The airflow from these chambers travels obliquely forward, contacting the cardboard surface to increase the contact area. Furthermore, the temperature of the airflow from each chamber increases progressively along the carton conveying direction. This solution, by incorporating air chambers on the top and bottom of the drying chamber and progressively increasing the airflow temperature within them, effectively improves the drying effect on the ink. It also prevents ink cracking due to excessively rapid dehydration, ensuring drying quality. Additionally, the airflow from the air chambers travels in the opposite direction to the cardboard's movement, allowing it to flow along the cardboard surface, further enhancing the ink drying effect.

Description

Technical Field

[0001] This application relates to the field of printing technology, and in particular to the drying structure of packaging box printing equipment. Background Technology

[0002] In packaging box printing production, the drying process is a crucial step in ensuring printing quality, directly affecting subsequent processing efficiency and the stability of the finished product. Existing packaging box printing equipment typically uses a hot air chamber to dry the printed boxes, with an airflow design that uses a single, upward, direct blowing pattern.

[0003] This traditional airflow path has obvious defects: because the hot airflow only impacts the cardboard from the bottom in one direction, there are significant differences in the contact strength and heat exchange efficiency between the upper and lower sides of the cardboard and the hot airflow. The lower side is directly washed by the high-speed hot air, and the moisture or solvent evaporates quickly; while the upper side is prone to insufficient drying (such as local ink stickiness and insufficient adhesion) due to insufficient airflow coverage and weak heat transfer.

[0004] To ensure the upper part meets the required drying standards, the overall drying time needs to be extended. This not only reduces the continuous operating efficiency of the production line but also significantly increases energy consumption due to prolonged high-load operation of the equipment, contradicting the current printing industry's demand for efficient and energy-saving production. Therefore, to address these issues, this application provides a drying structure for packaging box printing equipment. Utility Model Content

[0005] To address the aforementioned issues, this application provides a drying structure for packaging box printing equipment.

[0006] The drying structure of the packaging box printing equipment provided in this application is a drying box structure with openings at both ends, and the inlet end is connected to the output end of the printing equipment. The characteristic feature is that: a conveyor belt structure is set inside the drying box to clamp and transport the cardboard from the top and bottom sides, and the conveyor belt structure drives from the input end to the output end of the drying box.

[0007] The drying oven is equipped with air conveying chambers on the upper and lower sides. The airflow output from the air conveying chambers is obliquely forward and contacts the cardboard surface, increasing the contact area with the cardboard. The temperature of the airflow output from each air conveying chamber increases gradually along the carton conveying direction.

[0008] By setting air chambers on the upper and lower sides of the drying chamber, and gradually increasing the air temperature in the air chambers, the drying effect on ink can be effectively improved. At the same time, it can prevent the ink from cracking due to excessive dehydration, thus ensuring the drying quality. In addition, the airflow output from the air chamber is opposite to the movement direction of the paperboard, allowing it to flow along the surface of the paperboard, further improving the drying effect on ink.

[0009] Preferably, the air supply chamber includes an air supply chamber one disposed on the upper side of the drying box and an air supply chamber two disposed on the lower side, and both air supply chamber one and air supply chamber two are connected to an external air supply structure through air supply pipes.

[0010] Preferably, a guide pipe is connected to the side of the air conveying chamber near the conveyor belt structure, and the bottom end of the guide pipe is bent towards the inlet side of the drying chamber.

[0011] Preferably, a flow guide hood is also provided on one side of the input end of the drying chamber, with the top of the flow guide hood connected to the outside, so as to exhaust the airflow inside the drying chamber to the outside.

[0012] Preferably, the top of the air guide is vertically welded with an air outlet groove that communicates with it, and an inlet is provided on the horizontal side of the air guide.

[0013] Preferably, the conveyor belt structure is provided in at least two sets, with two conveyor belts symmetrically arranged along the center line of the drying box in each set, and the drive rollers at both ends of the conveyor belt structure are connected to the drying box body through brackets.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] By setting air chambers on the upper and lower sides of the drying chamber, and gradually increasing the air temperature in the air chambers, the drying effect on ink can be effectively improved. At the same time, it can prevent the ink from cracking due to excessive dehydration, thus ensuring the drying quality. In addition, the airflow output from the air chamber is opposite to the movement direction of the paperboard, allowing it to flow along the surface of the paperboard, further improving the drying effect on ink. Attached Figure Description

[0016] Figure 1 It is the isometric drawing in Embodiment 1 of this application;

[0017] Figure 2 This is the bottom-view isometric drawing from Embodiment 1 of this application;

[0018] Figure 3 This is a longitudinal sectional front view of Embodiment 1 of this application;

[0019] Figure 4 This is an isometric view of the longitudinal section in Embodiment 1 of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Drying box; 2. Draft hood; 21. Air outlet slot; 22. Inlet; 3. Air supply chamber one; 31. Draft pipe one; 301. First air chamber; 302. Second air chamber; 303. Third air chamber; 304. Fourth air chamber; 305. Fifth air chamber; 4. Air supply pipe one; 5. Air supply chamber two; 51. Draft pipe two; 6. Air supply pipe two; 7. Conveyor belt structure; 71. Support frame. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 - Figure 4 This application will be described in further detail.

[0022] Example 1:

[0023] The drying structure of the packaging box printing equipment is referenced. Figure 1 - Figure 4 The drying chamber 1 is designed with openings at both ends. The inlet 22 is connected to the output end of the printing equipment. Inside the drying chamber 1, a conveyor belt structure 7 is installed to clamp and transport the cardboard from top to bottom. The conveyor belt structure 7 drives the cardboard from the inlet to the output end of the drying chamber 1. At least two sets of conveyor belt structures 7 are provided, with two conveyor belts symmetrically arranged along the centerline of the drying chamber 1 in each set. The drive rollers at both ends of the conveyor belt structure 7 are connected to the body of the drying chamber 1 via supports 71. The conveyor belt structure 7 includes the conveyor belt body and drive rollers located at both ends on its inner side. The supports 71 are respectively located on the side of each drive roller away from the cardboard, and each support 71 is independent of the others. The conveyor belts are positioned in the non-printing area of ​​the cardboard to avoid damage to the printing area. The two conveyor belts in each set of conveyor belt structures 7 clamp the cardboard, ensuring that the cardboard can move forward evenly and that its position inside the drying chamber 1 remains stable under the action of airflow.

[0024] The air supply chamber includes an air supply chamber 3 located on the upper side of the drying chamber 1 and an air supply chamber 5 located on the lower side. Both air supply chambers 3 and 5 are connected to an external air supply structure via air supply pipes. The top of air supply chamber 3 is connected to air supply pipe 4, and the bottom of air supply chamber 5 is connected to air supply pipe 6. Figure 4 As shown, the air supply chamber is divided into five chambers: a first air chamber 301, a second air chamber 302, a third air chamber 303, a fourth air chamber 304, and a fifth air chamber 305, with progressively increasing temperatures. Temperature control can be achieved directly through the external air supply structure or by installing resistance wires with different heating temperatures in each air chamber. Taking solvent-based ink drying as an example, the drying range of the air chambers is 40-100℃, with the temperatures of the first air chamber 301, second air chamber 302, third air chamber 303, fourth air chamber 304, and fifth air chamber 305 being 40℃, 55℃, 70℃, 85℃, and 100℃, respectively. Other suitable values ​​are also possible. For water-based inks, a temperature range of 50-80℃ is used for drying.

[0025] A guide pipe is connected to the side of the air conveying chamber near the conveyor belt structure 7, and the bottom end of the guide pipe is bent towards the inlet 22 of the drying chamber 1. The bottom of the first air conveying chamber 3 is welded with a guide pipe 31 connected to it, and the bottom of the second air conveying chamber 5 is welded with a guide pipe 51 connected to it. The ends of the first guide pipe 31 and the second guide pipe 51 are both bent towards the inlet 22 of the drying chamber 1. The bending angle can be 10°-45° with the horizontal plane, preferably 15° or 20°, which can effectively increase the contact area between the airflow and the carton, thereby improving the drying effect.

[0026] A flow guide hood 2 is also provided on one side of the input end of the drying oven 1. The top of the flow guide hood 2 is connected to the outside, so as to exhaust the airflow inside the drying oven 1 to the outside.

[0027] The top of the air guide hood 2 is vertically welded with an air outlet slot 21 that communicates with it. An inlet 22 is provided on the horizontal side of the air guide hood 2. The air outlet slot 21 is connected to an external air duct to guide the internal airflow to the outside and prevent excessive airflow from being output to the outside through the inlet 22. A rubber chain is installed at the location of the inlet 22. This rubber curtain needs to ensure that it does not come into contact with the cardboard to avoid adverse effects on the ink printing position.

[0028] The foregoing description of an exemplary embodiment of the drying structure of the packaging box printing equipment provided in this disclosure refers to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, which is determined by the appended claims.

Claims

1. A drying structure of a printing apparatus of a packaging box, a drying box (1) structure with two open ends is provided, an inlet (22) end is connected with an output end of the printing apparatus, characterized in that: The drying box (1) is equipped with a conveyor belt structure (7) for clamping and transporting the cardboard from the top and bottom sides. The conveyor belt structure (7) is driven from the input end to the output end of the drying box (1). The drying box (1) is provided with air conveying chambers (3, 5) on the upper and lower sides. The airflow output from the air conveying chambers (3, 5) is obliquely forward and contacts the surface of the cardboard, increasing the contact area with the cardboard. The temperature of the airflow output in each air conveying chamber (3, 5) increases gradually along the carton conveying direction.

2. The drying structure of claim 1, wherein: The air supply chamber includes an air supply chamber one (3) located on the upper side of the drying box (1) and an air supply chamber two (5) located on the lower side. Both the air supply chamber one (3) and the air supply chamber two (5) are connected to the external air supply structure through air supply pipes (4, 6).

3. The drying structure according to claim 1, characterized in that: The air supply chambers (3, 5) are connected to the side of the conveyor belt structure (7) by a guide pipe (31, 51), and the bottom end of the guide pipe (31, 51) is bent toward the inlet (22) of the drying box (1).

4. The drying structure according to claim 1, characterized in that: A flow guide hood (2) is also provided on one side of the input end of the drying box (1). The top of the flow guide hood (2) is connected to the outside, so as to discharge the airflow inside the drying box (1) to the outside.

5. The drying structure according to claim 4, characterized in that: The top of the air guide (2) is vertically welded to the air outlet slot (21) connected to it, and the air guide (2) is provided with an inlet (22) on the horizontal side.

6. The drying structure according to claim 1, characterized in that: The conveyor belt structure (7) is provided with at least two sets, and two conveyor belts are symmetrically arranged along the center line of the drying box (1) in each set. The transmission rollers at both ends of the conveyor belt structure (7) are connected to the drying box (1) through the bracket (71).

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