Drying device for printed plastic packaging bag

Abstract

The utility model discloses a drying device for printed plastic packaging bags, which belongs to the technical field of packaging bag production devices and comprises a machine tool, a driving motor and a conveying belt are mounted on the machine tool, the output end of the driving motor is coaxially and fixedly connected with the input end of the conveying belt, and the plastic packaging bags are placed on the conveying belt. And the drying mechanism comprises a drying frame, the drying frame is fixedly connected to the machine tool, and feeding ports are formed in the two sides of the drying frame in a penetrating mode. The drying mechanism and the vacuum machine are arranged, an upper sealing frame is moved downwards in the drying mechanism to extrude an upper pressing roller to deform the upper pressing roller, so that a drying space is defined by the upper sealing frame, a lower sealing frame, the upper pressing roller and a lower pressing roller, the vacuum machine starts to exhaust air through an exhaust pipe, air in the drying space is reduced, and the air pressure is reduced; the boiling point of a solvent in the ink is greatly reduced, and the ink can be quickly volatilized at a relatively low temperature.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging bag production devices, in particular to a drying device for printed plastic packaging bags. Background Art

[0002] Plastic packaging bags are bags used to package various items, making it convenient to transport goods during the production and circulation process and easy to store. They are the most common products in life. In order to make plastic packaging bags beautiful and for promotional needs, text and patterns are often printed on the surface of plastic bags. After printing, the ink needs to be dried to prevent the ink from drying easily, resulting in the inability to reel them up immediately after printing, affecting production efficiency.

[0003] In the prior art, a drying motor is used to drive a drying fan to dry the ink on the top wall of the packaging bag body. This method is likely to cause the ink to flow, affecting the printing effect, and has a poor drying effect on the ink. It is impossible to improve the drying effect by lowering the boiling point of the solvent in the ink. Utility Model Content

[0004] The purpose of the utility model is to propose a drying device for plastic packaging bags after printing, so as to solve the problem that in the traditional technology, a drying motor is used to drive a drying fan to rotate to air-dry the ink on the top wall of the packaging bag body, which easily causes the ink to flow, affects the printing effect, and has a poor drying effect on the ink, and cannot improve the drying effect by lowering the boiling point of the solvent in the ink.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A drying device for printed plastic packaging bags, comprising:

[0007] A machine tool, wherein a drive motor and a conveyor belt are installed on the machine tool, an output end of the drive motor is coaxially fixedly connected to an input end of the conveyor belt, and a plastic packaging bag is placed on the conveyor belt;

[0008] The drying mechanism comprises a drying frame, which is fixedly connected to the machine tool, and has feeding ports on both sides of the drying frame. A hydraulic push rod is installed on the top of the drying frame, and the output end of the hydraulic push rod extends into the drying frame and is fixedly connected to an upper sealing frame. An infrared lamp group is installed at the bottom of the upper sealing frame, and the output direction of the infrared lamp group points to the conveyor belt in the drying frame. Two deformable upper pressure rollers are rotatably connected to the top of the drying frame, and two lower pressure rollers are rotatably connected to the bottom. The two upper pressure rollers are located on both sides of the bottom of the upper sealing frame, and the bottoms of the two lower pressure rollers are against the lower sealing frame. The lower sealing frame is fixedly connected to the bottom of the drying frame. A drying space is enclosed by the upper sealing frame, the lower sealing frame, the upper pressure roller and the lower pressure roller, and the output end of the conveyor belt passes through the feeding port and the inside of the drying space;

[0009] A vacuum machine is installed on the top of the drying frame, and an input end is connected to an exhaust pipe, and an end of the exhaust pipe away from the vacuum machine is connected to the interior of the drying space.

[0010] Preferably, the machine tool is fixedly connected to two fixing frames, and the drying frame is fixedly connected to the two fixing frames.

[0011] Preferably, both ends of the upper pressure roller are coaxially fixedly connected to sealing rollers, and the side of the sealing roller is in sealed sliding contact with the side of the conveyor belt. The upper pressure roller is deformed after being squeezed by the upper sealing frame and is in sealed rotational contact with the upper sealing frame and the output end of the conveyor belt, and the sealing roller is in sealed rotational contact with the lower pressure roller, and the lower sealing frame is in sealed contact with the lower pressure roller.

[0012] Preferably, the opposing surfaces of the upper sealing frame and the lower sealing frame are coated with a reflective coating.

[0013] Preferably, a plurality of support columns are fixedly connected to the bottom of the drying frame, and the lower sealing frame is fixedly connected to the plurality of support columns.

[0014] Preferably, a control screen is installed on the drying frame, and a sensor is provided in the feed port. The sensor is used to detect whether a plastic packaging bag passes by. The control screen is electrically connected to the sensor, drive motor, vacuum machine, hydraulic push rod and infrared lamp group, and is used to receive signals from the sensor and control the working status of the drive motor, vacuum machine, hydraulic push rod and infrared lamp group.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the utility model, a drying mechanism and a vacuum machine are provided. In the drying mechanism, the upper sealing frame is moved downward to squeeze the upper pressing roller to deform it, thereby forming a drying space between the upper sealing frame, the lower sealing frame, the upper pressing roller and the lower pressing roller. The vacuum machine starts to evacuate air through the exhaust pipe, thereby reducing the air in the drying space and lowering the air pressure. The boiling point of the solvent in the ink is greatly reduced, and it can evaporate quickly at a lower temperature. At the same time, infrared heating can directly act on the ink molecules, causing them to vibrate violently to generate heat, accelerating the volatilization of the solvent and the drying of the ink. The combination of the two can significantly improve the drying efficiency.

[0017] 2. In the present invention, by providing an upper sealing frame and a lower sealing frame, both surfaces of which are coated with a reflective coating, the infrared rays emitted by the infrared lamp group can be reflected, thereby improving the utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall axonometric structure of a drying device for printed plastic packaging bags proposed by the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of a hydraulic push rod and a control screen of a drying device for printed plastic packaging bags proposed by the utility model.

[0020] Figure 3 This is a schematic structural diagram of an upper pressing roller and a lower pressing roller of a drying device for plastic packaging bags after printing proposed by the utility model.

[0021] In the figure: 1 machine tool, 2 drive motor, 3 conveyor belt, 4 fixed frame, 5 drying frame, 6 vacuum machine, 7 exhaust pipe, 8 control panel, 9 hydraulic push rod, 10 feeding port, 11 upper pressure roller, 12 sealing roller, 13 lower pressure roller, 14 upper sealing frame, 15 lower sealing frame, 16 support column, 17 infrared lamp group. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figure 1-Figure 3 , a drying device for printed plastic packaging bags, comprising:

[0024] The machine tool 1 is provided with a driving motor 2 and a conveyor belt 3. The output end of the driving motor 2 is coaxially fixedly connected to the input end of the conveyor belt 3. A plastic packaging bag is placed on the conveyor belt 3.

[0025] The drying mechanism includes a drying frame 5, which is fixedly connected to the machine tool 1. A feeding port 10 is provided on both sides of the drying frame 5. A hydraulic push rod 9 is installed on the top of the drying frame 5. The output end of the hydraulic push rod 9 extends into the drying frame 5 and is fixedly connected to an upper sealing frame 14. An infrared lamp group 17 is installed at the bottom of the upper sealing frame 14. The output direction of the infrared lamp group 17 points to the conveyor belt 3 in the drying frame 5. Two deformable upper pressure rollers 11 are rotatably connected to the top of the drying frame 5, and two lower pressure rollers 13 are rotatably connected to the bottom. The two upper pressure rollers 11 are located on both sides of the bottom of the upper sealing frame 14. The bottoms of the two lower pressure rollers 13 are against a lower sealing frame 15. The lower sealing frame 15 is fixedly connected to the bottom of the drying frame 5. A drying space is enclosed by the upper sealing frame 14, the lower sealing frame 15, the upper pressure roller 11 and the lower pressure roller 13. The output end of the conveyor belt 3 passes through the feeding port 10 and the inside of the drying space;

[0026] The vacuum machine 6 is installed on the top of the drying frame 5, and the input end is connected to the exhaust pipe 7, and the exhaust pipe 7 is connected to the interior of the drying space at one end away from the vacuum machine 6.

[0027] Two fixing frames 4 are fixedly connected to the machine tool 1 , and a drying frame 5 is fixedly connected to the two fixing frames 4 .

[0028] Both ends of the upper pressure roller 11 are coaxially fixedly connected with a sealing roller 12, and the side of the sealing roller 12 is in sealed sliding contact with the side of the conveyor belt 3. The upper pressure roller 11 is deformed after being squeezed by the upper sealing frame 14 and is in sealed rotational contact with the upper sealing frame 14 and the output end of the conveyor belt 3, and the sealing roller 12 is in sealed rotational contact with the lower pressure roller 13, and the lower sealing frame 15 is in sealed contact with the lower pressure roller 13.

[0029] The opposing surfaces of the upper sealing frame 14 and the lower sealing frame 15 are coated with a reflective coating.

[0030] A plurality of support columns 16 are fixedly connected to the bottom of the drying frame 5 , and the lower sealing frame 15 is fixedly connected to the plurality of support columns 16 .

[0031] A control screen 8 is installed on the drying frame 5, and a sensor is provided in the feed port 10. The sensor is used to detect whether a plastic packaging bag passes by. The control screen 8 is electrically connected to the sensor, the drive motor 2, the vacuum machine 6, the hydraulic push rod 9 and the infrared lamp group 17, and is used to receive the sensor signal and control the working status of the drive motor 2, the vacuum machine 6, the hydraulic push rod 9 and the infrared lamp group 17.

[0032] The operating principle of the present invention is now described as follows:

[0033] In the present invention, the machine tool 1 and the drive motor 2 drive the conveyor belt 3 to rotate. The plastic packaging bags with spaces between them after printing start to move on the conveyor belt 3. After entering the feeding port 10 of the drying frame 5, the feeding port 10 is provided with a sensor. After detecting the plastic packaging bag, the hydraulic push rod 9 is started, driving the upper sealing frame 14 to move upward. The upper pressing roller 11 eliminates the situation of being squeezed and deformed, allowing the packaging bag to enter the middle area between the two upper pressing rollers 11.

[0034] After entering, the upper sealing frame 14 is immediately pressed down, and the upper pressure roller 11 is squeezed and deformed again. At this time, the upper pressure roller 11 and the conveyor belt 3 enter into a sealed rotational contact state, the sealing roller 12 and the lower pressure roller 13 enter into a sealed rotational contact state, and the side of the sealing roller 12 and the side of the conveyor belt 3 enter into a sealed sliding contact state. The upper sealing frame 14 and the upper pressure roller 11 enter into a sealed rotational contact state, and the lower sealing frame 15 and the lower pressure roller 13 enter into a sealed contact state;

[0035] Infrared lamp assembly 17 illuminates the corresponding infrared lamp according to the set printing pattern, specifically irradiating the printed ink. The surfaces of upper sealing frame 14 and lower sealing frame 15 are coated with a reflective coating to reflect the reflected infrared rays, improving their utilization rate. At the same time, vacuum machine 6 begins to operate, pumping air through exhaust pipe 7, reducing the pressure in the sealed space and reducing the amount of air. With the reduced air pressure, the boiling point of the solvent in the ink is significantly lowered, allowing it to evaporate quickly at a lower temperature. At the same time, infrared heating can directly act on the ink molecules, causing them to vibrate violently and generate heat, accelerating the volatilization of the solvent and the drying of the ink. The combination of the two can significantly improve drying efficiency.

[0036] This design greatly reduces the time required for drying, and the water vapor generated by drying will be instantly absorbed, with high drying efficiency. After drying is completed, the upper sealing frame 14 is lifted, contacting the sealing state, so that the dried packaging bag can be removed.

[0037] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drying device for printed plastic packaging bags, characterized in that: include: A machine tool (1), wherein a drive motor (2) and a conveyor belt (3) are installed on the machine tool (1), an output end of the drive motor (2) and an input end of the conveyor belt (3) are coaxially fixedly connected, and a plastic packaging bag is placed on the conveyor belt (3); A drying mechanism, comprising a drying frame (5), the drying frame (5) being fixedly connected to the machine tool (1), a feeding port (10) being provided on both sides of the drying frame (5), a hydraulic push rod (9) being installed on the top of the drying frame (5), an output end of the hydraulic push rod (9) extending into the drying frame (5) and being fixedly connected to an upper sealing frame (14), an infrared lamp group (17) being installed on the bottom of the upper sealing frame (14), an output direction of the infrared lamp group (17) being directed toward the conveyor belt (3) in the drying frame (5), and the drying frame (5) Two deformable upper pressure rollers (11) are rotatably connected to the top of the inner portion, and two lower pressure rollers (13) are rotatably connected to the bottom portion, the two upper pressure rollers (11) are located on both sides of the bottom of the upper sealing frame (14), the bottoms of the two lower pressure rollers (13) are against a lower sealing frame (15), and the lower sealing frame (15) is fixedly connected to the bottom of the drying frame (5), and a drying space is formed between the upper sealing frame (14), the lower sealing frame (15), the upper pressure rollers (11) and the lower pressure rollers (13), and the output end of the conveyor belt (3) passes through the feed port (10) and the inside of the drying space; A vacuum machine (6) is installed on the top of the drying frame (5), and an input end is connected to an exhaust pipe (7), and an end of the exhaust pipe (7) away from the vacuum machine (6) is connected to the interior of the drying space.

2. The drying device for printed plastic packaging bags according to claim 1, characterized in that: in: Two fixing frames (4) are fixedly connected to the machine tool (1), and the drying frame (5) is fixedly connected to the two fixing frames (4).

3. The drying device for printed plastic packaging bags according to claim 1, characterized in that: in: Both ends of the upper pressure roller (11) are coaxially fixedly connected to a sealing roller (12), and the side of the sealing roller (12) is in sealed sliding contact with the side of the conveyor belt (3). After being squeezed by the upper sealing frame (14), the upper pressure roller (11) is deformed and is in sealed rotational contact with the upper sealing frame (14) and the output end of the conveyor belt (3), and the sealing roller (12) is in sealed rotational contact with the lower pressure roller (13), and the lower sealing frame (15) is in sealed contact with the lower pressure roller (13).

4. The drying device for printed plastic packaging bags according to claim 1, characterized in that: in: The opposing surfaces of the upper sealing frame (14) and the lower sealing frame (15) are coated with a reflective coating.

5. The drying device for printed plastic packaging bags according to claim 1, characterized in that: in: A plurality of support columns (16) are fixedly connected to the bottom of the drying frame (5), and the lower sealing frame (15) is fixedly connected to the plurality of support columns (16).

6. The drying device for printed plastic packaging bags according to claim 1, characterized in that: in: A control screen (8) is installed on the drying frame (5), and a sensor is provided in the feed port (10). The sensor is used to detect whether a plastic packaging bag passes through. The control screen (8) is electrically connected to the sensor, the drive motor (2), the vacuum machine (6), the hydraulic push rod (9) and the infrared lamp group (17), and is used to receive signals from the sensor and control the working status of the drive motor (2), the vacuum machine (6), the hydraulic push rod (9) and the infrared lamp group (17).

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