Package printing equipment and method

Abstract

The invention discloses package printing equipment and method, and relates to the technical field of package printing equipment.The package printing equipment comprises a conveying machine table, a printing machine table installed in the middle of the conveying machine table and a silk screen frame installed below the printing machine table, and shaping mechanisms for smoothing plastic bags are arranged on the two sides of the silk screen frame; a pneumatic mechanism for blowing plastic bags is arranged at the top of the conveying machine table, the pneumatic mechanism comprises a base fixedly installed at the top of the conveying machine table, a lifting groove is formed in the base, and an air pressure end is installed in the lifting groove in a sliding mode; the shaping mechanism and the pneumatic mechanism are connected with each other, the shaping mechanism is used for flattening the plastic bags to improve the printing effect, meanwhile, the pneumatic mechanism is used for driving the shaping mechanism to change the moving stroke during resetting, and the plastic bags to be printed are shaped and discharged. The package printing equipment and method have the effect of improving the printing efficiency and the quality of finished products.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging and printing equipment, and in particular to packaging and printing equipment and a method. Background Art

[0002] Plastic bags are bags made of plastic (commonly used plastics include polypropylene, polyester, nylon, etc.) as the main raw material. They are indispensable items in people's daily lives and are often used to hold other items. They are widely used because of their low price, extremely light weight, large capacity, and easy storage. However, due to the disadvantages of plastic bags' extremely long degradation cycle and difficulty in handling, their production and use are banned in some countries. In order to increase the diversity of plastic bags and play a promotional role for manufacturers, the surface of plastic bags is usually printed during the preparation process.

[0003] The most common way to print plastic bags is to lay the plastic bags flat on the top of a conveyor belt, convey the plastic bags to the bottom of a screen printer through the conveyor belt, and print the plastic bags through the screen printer. However, the existing equipment does not have the ability to regularize the plastic bags when printing them, which will cause some wrinkled plastic bags to overlap and miss printing when being printed, thus affecting the quality of the finished product. Summary of the invention

[0004] The present invention discloses a packaging printing device and method, aiming to solve the technical problem that when existing printing equipment performs printing processing on plastic bags, on the one hand, it does not have the ability to perform regular processing on plastic bags, which will cause overlapping and missing printing in the printed parts of some wrinkled plastic bags when they are printed.

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

[0006] A packaging printing device, comprising a conveyor platform, a printing platform installed in the middle of the conveyor platform, and a screen frame installed below the printing platform, wherein shaping mechanisms for smoothing plastic bags are arranged on both sides of the screen frame, and the shaping mechanisms include two groups of mounting plates fixedly installed on the sides of the screen frame, and a rotating rod is rotatably installed at the end of each mounting plate, and a ceramic roller for squeezing plastic bags is rotatably installed between two symmetrically distributed rotating rods;

[0007] A pneumatic mechanism for blowing plastic bags is arranged on the top of the conveyor platform, and the pneumatic mechanism comprises a base fixedly mounted on the top of the conveyor platform, a lifting groove is provided inside the base, and a pneumatic terminal is slidably mounted inside the lifting groove;

[0008] The shaping mechanism and the pneumatic mechanism are connected to each other, and the shaping mechanism is used to smooth the plastic bag to improve the printing effect, while the pneumatic mechanism is used to drive the shaping mechanism to change the moving stroke during resetting to shape and discharge the plastic bag to be printed.

[0009] A shaping mechanism for smoothing the plastic bag is arranged on the side of the screen frame of a traditional screen printing machine. The shaping mechanism moves synchronously with the movement of the screen frame, and smoothes the surface of the plastic bag by expanding and squeezing the corners of the plastic bag while moving, thereby ensuring the efficiency of the screen frame in printing the plastic bag. At the same time, a pneumatic mechanism for blowing the plastic bag is additionally arranged on the top of the conveyor table. The shaping mechanism that moves vertically will dock with the end of the pneumatic mechanism, thereby changing the stroke during resetting under the influence of the pneumatic mechanism, from expanding downward to vertical lifting, thereby preventing the plastic bag from shifting due to static electricity when the shaping mechanism is reset. At the same time, along with the resetting of the shaping mechanism, the pneumatic mechanism can blow and shape the surface of the printed plastic bag in a blowing manner, accelerate the cooling and forming of the print, thereby greatly improving the working efficiency and operational perfection of the equipment.

[0010] In a preferred solution, the shaping mechanism further comprises a single-way tube and a double-way tube rotatably mounted on the outer sides of the two rotating rods located on the same side, and a telescopic hose is connected through the single-way tube and the double-way tube.

[0011] By providing two sets of ceramic roller structures rotatably installed on the side of the screen frame, along with the vertical movement of the screen frame, the ceramic rollers located on the side of the screen frame will move downward synchronously, and push on the corners of the plastic bag in an outward extrusion manner to smooth the surface of the plastic bag, thereby ensuring the printing quality of the plastic bag by the screen frame.

[0012] In a preferred embodiment, the pneumatic mechanism further includes an end portion of the air pressure terminal connected to an end portion of the two-way tube, a pump is installed on the top of the base, and the pump is connected to an internal air path of the air pressure terminal.

[0013] By setting a pneumatic terminal structure that is slidably installed inside the base on the top of the conveyor table, using a pump to blow air into the pneumatic terminal, and coordinating the docking of the double-way pipe and the end of the pneumatic terminal, when the ceramic roller is reset upward, the pneumatic terminal can travel a certain distance synchronously with the single-way pipe and the double-way pipe. During this period, the air pressure is used to drive the telescopic hose to extend and push the two sets of rotating rods, thereby ensuring that the downward movement of the two ceramic rollers is downward movement and outward expansion, and the upward movement is upward movement while maintaining the current state. The ceramic rollers that are reset upward are prevented from moving the printed plastic bags, causing the plastic bags to shift, thereby ensuring the integrity of the operation of this equipment.

[0014] In a preferred solution, connecting plates are fixedly installed at both ends of the screen frame, and the screen frame is connected to the printing machine table through the connecting plates. An air vent is fixedly installed under one of the connecting plates, and the air vent is connected to the inside of the single-way pipe and the double-way pipe to blow the top of the plastic bag.

[0015] By providing an air vent structure connected to the single-way pipe and the double-way pipe, when the resetting double-way pipe is released from the connection with the air pressure end, the air pressure inside the double-way pipe and the single-way pipe will be discharged from the inside of the air vent as the rotating rod is reset and rotated, and will blow on the surface of the printed plastic bag, thereby accelerating the plasticity of the printing and improving the functionality of the equipment and the efficiency of printing.

[0016] In a preferred solution, a spherical joint is fixed to the end of the two-way tube, a soft rubber nozzle is fixed to the end of the air pressure end head, the spherical joint and the soft rubber nozzle are squeezed and engaged, a retention interval is opened on the side of the base, and the spherical joint is slidably distributed inside the retention interval.

[0017] By connecting a spherical joint at the end of the two-way tube and a soft rubber nozzle at the end of the air pressure end, the stability of the air circuit is ensured. At the same time, when the two-way tube is reset and moved, the special spherical joint can automatically disconnect from the soft rubber nozzle. At the same time, the retention interval can provide space for the movement of the spherical joint, thereby ensuring the integrity of the operation of this equipment.

[0018] A method for using a packaging printing device comprises the following steps:

[0019] S1: starting the whole equipment, the conveyor table is running, and the plastic bags to be printed are conveyed to the bottom of the printing table;

[0020] S2: the printing machine table intermittently pushes the screen frame to move vertically, and prints the print through the screen frame to the top of the plastic bag;

[0021] S3: When the screen frame is pushed to move vertically, the shaping mechanism starts automatically to squeeze and pull the two ends of the plastic bag below the screen frame, so that the plastic bag is smoothed and printed;

[0022] S4: After the shaping mechanism moves vertically along with the screen frame, it will dock with the pneumatic mechanism. At this time, the pneumatic mechanism starts, and the air pressure is injected into the shaping mechanism to change the state of the shaping mechanism when it is reset and lifted, so as to prevent the shaping mechanism and the plastic bag from sticking together due to static electricity. At the same time, the pneumatic mechanism will blow the surface of the plastic bag to accelerate the printing shaping.

[0023] As can be seen from the above, the packaging printing device and method provided by the present invention have the following improvements and advantages compared with the prior art:

[0024] First, on the basis of the traditional screen printing machine, two sets of ceramic roller structures are rotatably installed on the side of the screen frame. As the screen frame moves vertically, the ceramic rollers on the side of the screen frame will move downward synchronously and push on the corners of the plastic bag in an outward extrusion manner to smooth the surface of the plastic bag, thereby ensuring the printing quality of the screen frame on the plastic bag and improving the functionality of the traditional screen printing machine.

[0025] Secondly, a pneumatic terminal structure slidably mounted inside the base is set on the top of the conveyor platform. A pump is used to inflate air into the pneumatic terminal, and the double-way pipe moves vertically downward. When the ceramic roller is squeezed on the surface of the plastic bag, the double-way pipe will dock with the end of the pneumatic terminal. As the ceramic roller resets upward, the pneumatic terminal can synchronously travel a certain distance. During this period, the air pressure is used to drive the telescopic hose to extend and push the two sets of rotating rods, thereby ensuring that the working stroke of the two ceramic rollers is downward and outward, and the reset stroke is upward and keeps the current state motionless, preventing the upward reset ceramic rollers from moving the printed plastic bags and causing the plastic bags to shift, thereby ensuring the integrity of the operation of this equipment. At the same time, as the double-way pipe is reset and the connection relationship with the pneumatic terminal is released, the air pressure inside the double-way pipe and the single-way pipe will rotate with the reset of the rotating rod, be discharged from the inside of the air discharge row and blow on the surface of the printed plastic bag, thereby accelerating the plasticity of the printing and improving the functionality and efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention provides a schematic diagram of the overall structure of a packaging printing device and method.

[0027] Figure 2 The present invention is a schematic diagram of the top structure of a conveyor table of a packaging and printing device proposed by the present invention.

[0028] Figure 3 The present invention is a side view of a shaping mechanism of a packaging and printing device.

[0029] Figure 4 This is an exploded diagram of the shaping mechanism structure of a packaging and printing device proposed by the present invention.

[0030] Figure 5 A side view of a telescopic hose of a packaging and printing device proposed by the present invention.

[0031] Figure 6 A side view of a pneumatic mechanism of a packaging and printing device proposed by the present invention.

[0032] Figure 7This is a cross-sectional view of the pneumatic mechanism of a packaging and printing device proposed by the present invention.

[0033] Figure 8 The present invention is a schematic diagram of the structure of an air pressure terminal of a packaging and printing device.

[0034] In the figure: 1. conveyor table; 2. printing machine table; 3. screen frame; 4. shaping mechanism; 401. mounting plate; 402. rotating rod; 403. ceramic roller; 404. single-way pipe; 405. double-way pipe; 406. telescopic hose; 407. exhaust pipe; 5. pneumatic mechanism; 501. base; 502. lifting slot; 503. air pressure terminal; 504. pump; 505. straight slot; 506. spring; 507. retention interval; 6. spherical joint; 7. soft rubber nozzle; 8. connecting plate. DETAILED DESCRIPTION

[0035] 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.

[0036] The packaging printing device and method disclosed in the present invention are mainly used in the scenario of plastic bag packaging printing.

[0037] Reference Figures 1 to 8 A packaging printing device comprises a conveyor platform 1, a printing platform 2 installed in the middle of the conveyor platform 1 and a screen frame 3 installed below the printing platform 2, a shaping mechanism 4 for smoothing plastic bags is arranged on both sides of the screen frame 3, the shaping mechanism 4 comprises two sets of mounting plates 401 fixedly mounted on the sides of the screen frame 3, a rotating rod 402 is rotatably mounted at the end of each mounting plate 401, and a ceramic roller 403 for squeezing plastic bags is rotatably mounted between the two symmetrically distributed rotating rods 402;

[0038] A pneumatic mechanism 5 for blowing plastic bags is provided on the top of the conveyor platform 1. The pneumatic mechanism 5 includes a base 501 fixedly installed on the top of the conveyor platform 1. A lifting groove 502 is provided inside the base 501. A pneumatic terminal 503 is slidably installed inside the lifting groove 502.

[0039] The shaping mechanism 4 and the pneumatic mechanism 5 are interconnected. The shaping mechanism 4 is used to smooth the plastic bag to improve the printing effect. At the same time, the pneumatic mechanism 5 is used to drive the shaping mechanism 4 to change the moving stroke during resetting to shape and discharge the plastic bag to be printed.

[0040] In this embodiment: the operator starts the whole equipment, the conveyor table 1 runs, and the plastic bag to be printed is conveyed to the bottom of the printing machine table 2. The printing machine table 2 will intermittently push the screen frame 3 to move vertically, and print the print to the top of the plastic bag through the screen frame 3. While the screen frame 3 is pushed to move vertically, the shaping mechanism 4 will start automatically to squeeze and pull the two ends of the plastic bag below the screen frame 3, so that the plastic bag is smoothed and printed. At the same time, after the shaping mechanism 4 moves vertically along with the screen frame 3, it will dock with the pneumatic mechanism 5. At this time, the pneumatic mechanism 5 starts, and by injecting air pressure into the interior of the shaping mechanism 4, the state of the shaping mechanism 4 when it is reset and lifted is changed to prevent the shaping mechanism 4 and the plastic bag from sticking due to static electricity. At the same time, the pneumatic mechanism 5 will blow the surface of the plastic bag to accelerate the shaping of the print.

[0041] In the above scheme, considering that wrinkles on the surface of the plastic bag placed flat on the top of the conveyor table 1 will affect the printing effect, it is necessary to remove the wrinkles on the surface of the plastic bag before printing on the plastic bag. The specific operation is as follows.

[0042] Reference Figures 1 to 6 In a preferred embodiment, the shaping mechanism 4 also includes two rotating rods 402 located on the same side, on the outer sides of which are rotatably mounted a single-way tube 404 and a double-way tube 405, respectively, and a telescopic hose 406 is connected between the single-way tube 404 and the double-way tube 405.

[0043] In this embodiment: when the screen frame 3 is pushed to move vertically, the ceramic rollers 403 located on both sides of the screen frame 3 will move downward synchronously and squeeze the two ends of the plastic bag below the screen frame 3. While squeezing, the ceramic rollers 403 will rotate and drive the rotating rod 402 to rotate outward around the mounting plate 401, thereby pulling the two ends of the plastic bag, causing the plastic bag to be smoothed and printed by the screen frame 3.

[0044] In the above scheme, in order to prevent the ceramic roller 403 from being affected by static electricity when it is reset and lifted, which may cause the plastic bag to be misplaced, the specific operation is as follows.

[0045] Reference Figure 1 to Figure 2 , Figures 6 to 8 In a preferred embodiment, the pneumatic mechanism 5 also includes an end of a pneumatic terminal 503 connected to an end of a two-way tube 405, a pump 504 is installed on the top of the base 501, and the internal air path of the pump 504 and the pneumatic terminal 503 is connected.

[0046] In this embodiment: the ceramic roller 403 drives the rotating rod 402 to rotate outward around the mounting plate 401, and the single-way tube 404 and the double-way tube 405 connected between the two rotating rods 402 rotate synchronously. As the double-way tube 405 moves downward, while the ceramic roller 403 smoothes the surface of the plastic bag, the end of the double-way tube 405 is connected to the air pressure terminal 503. At this time, the pump 504 starts and ventilates the inside of the double-way tube 405 through the air pressure terminal 503, causing the telescopic hose 406 to tighten, and the screen frame 3 is lifted after completing the printing process of a single plastic bag. At this time, the two sets of rotating rods 402 will be supported by the stretched telescopic hose 406 to maintain the current state and move upward. While moving, the pneumatic terminal 503 will be synchronously lifted along the inside of the lifting groove 502 until it is squeezed and restricted by the base 501. At this time, the two-way tube 405 that continues to reset and lift will disconnect from the pneumatic terminal 503. As the two-way tube 405 and the pneumatic terminal 503 are disconnected, the telescopic hose 406 that loses the air pressure push will return to the contracted soft state, and the two sets of rotating rods 402 that have lost the restriction will drive the ceramic roller 403 to reset and rotate.

[0047] Among them, connecting plates 8 are fixedly installed at both ends of the screen frame 3, and the screen frame 3 is connected to the printing machine 2 through the connecting plates 8. An air vent 407 is fixedly installed under one of the connecting plates 8. The air vent 407 is connected to the inside of the single-way tube 404 and the double-way tube 405 and blows on the top of the plastic bag; as the double-way tube 405 and the air pressure end 503 are disconnected, the telescopic hose 406 that loses the air pressure will return to the contracted soft state. In this process, part of the air pressure inside the telescopic hose 406 will be blown onto the surface of the printed plastic bag through the air vent 407, thereby accelerating the formation of the printing, and when the pump 504 is running and the telescopic hose 406 is stretched straight, the air vent 407 will start to deflate together, and the air guide volume of the pump 504 to the inside of the telescopic hose 406 is greater than the air outlet volume of the air vent 407, so as to keep the telescopic hose 406 stretched straight.

[0048] Furthermore, a spring 506 is connected between the pneumatic terminal 503 and the lifting groove 502, and the spring 506 is used to pull the lifted pneumatic terminal 503 to reset, and a straight groove 505 is opened through the side of the base 501, and the end of the pneumatic terminal 503 is slidably distributed inside the straight groove 505, providing a travel for the movement of the pneumatic terminal 503; and a spherical joint 6 is fixed to the end of the two-way tube 405, and a soft rubber nozzle 7 is fixed to the end of the pneumatic terminal 503, and the spherical joint 6 and the soft rubber nozzle 7 are squeezed and engaged, and a retention area 507 is opened on the side of the base 501, and the spherical joint 6 is slidably distributed inside the retention area 507, and the spherical joint 6 and the soft rubber nozzle 7 are used to facilitate the connection and disconnection of the air path.

[0049] Working principle: When in use, the operator starts the entire equipment, the conveyor table 1 runs, and the plastic bag to be printed is conveyed to the bottom of the printing table 2. The printing table 2 will intermittently push the screen frame 3 to move vertically, and print the print to the top of the plastic bag through the screen frame 3. While the screen frame 3 is pushed to move vertically, the ceramic rollers 403 on both sides of the screen frame 3 will move downward synchronously and squeeze the two ends of the plastic bag under the screen frame 3. While squeezing, the ceramic rollers 403 will rotate and drive the rotating rod 402 to rotate around the mounting plate 401 rotates outward, thereby pulling the two ends of the plastic bag, so that the plastic bag is smoothed and printed by the screen frame 3. At the same time, the ceramic roller 403 drives the rotating rod 402 to rotate outward around the mounting plate 401, and the single-way pipe 404 and the double-way pipe 405 connected between the two rotating rods 402 rotate synchronously. As the double-way pipe 405 moves downward, when the ceramic roller 403 smoothes the surface of the plastic bag, the end of the double-way pipe 405 is connected to the air pressure terminal 503. At this time, the pump 504 is started and passes through the air pressure terminal 503. 3 ventilates the inside of the double-way pipe 405, causing the telescopic hose 406 to be tightened, and the screen frame 3 is lifted after completing the printing process on a single plastic bag. While lifting, the two sets of rotating rods 402 are supported by the stretched telescopic hose 406 to maintain the current state and move upward. While moving, the air pressure terminal 503 is synchronously lifted along the inside of the lifting groove 502 until it is squeezed and restricted by the base 501. At this time, the double-way pipe 405 that continues to reset and lift will disconnect from the air pressure terminal 503, and As the two-way tube 405 and the air pressure end 503 are disconnected, the telescopic hose 406 that has lost its air pressure push will return to its contracted and soft state, and the two sets of rotating rods 402 that have lost their restrictions will drive the ceramic roller 403 to reset and rotate. As the two-way tube 405 and the air pressure end 503 are disconnected, the telescopic hose 406 that has lost its air pressure push will return to its contracted and soft state. In this process, part of the air pressure inside the telescopic hose 406 will be blown onto the surface of the printed plastic bag through the air vent 407, thereby accelerating the formation of the printing.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A packaging printing device, comprising a conveyor platform (1), a printing platform (2) installed in the middle of the conveyor platform (1), and a screen frame (3) installed below the printing platform (2), characterized in that: The two sides of the wire mesh frame (3) are provided with shaping mechanisms (4) for smoothing the plastic bags. The shaping mechanisms (4) include two groups of mounting plates (401) fixedly mounted on the sides of the wire mesh frame (3). A rotating rod (402) is rotatably mounted on the end of each mounting plate (401). A ceramic roller (403) for squeezing the plastic bags is rotatably mounted between the two symmetrically distributed rotating rods (402). A pneumatic mechanism (5) for blowing plastic bags is arranged on the top of the conveyor platform (1), and the pneumatic mechanism (5) comprises a base (501) fixedly mounted on the top of the conveyor platform (1), a lifting groove (502) is provided inside the base (501), and a pneumatic terminal (503) is slidably mounted inside the lifting groove (502); The shaping mechanism (4) and the pneumatic mechanism (5) are connected to each other. The shaping mechanism (4) is used to smooth the plastic bag to improve the printing effect. At the same time, the pneumatic mechanism (5) is used to drive the shaping mechanism (4) to change the movement stroke during resetting, so as to shape and discharge the plastic bag to be printed.

2. A packaging printing device according to claim 1, characterized in that: The shaping mechanism (4) further comprises a single-way tube (404) and a double-way tube (405) rotatably mounted on the outer sides of the two rotating rods (402) located on the same side, respectively, and a telescopic hose (406) is connected between the single-way tube (404) and the double-way tube (405).

3. A packaging printing device according to claim 2, characterized in that: The pneumatic mechanism (5) also includes an end of the air pressure terminal (503) connected to the end of the two-way pipe (405), and a pump (504) is installed on the top of the base (501), and the pump (504) is connected to the internal air path of the air pressure terminal (503).

4. A packaging printing device according to claim 3, characterized in that: Connecting plates (8) are fixedly mounted on both ends of the screen frame (3), and the screen frame (3) is connected to the printing machine platform (2) via the connecting plates (8).

5. A packaging printing device according to claim 4, characterized in that: A deflation vent (407) is fixedly installed below one of the connection plates (8), and the deflation vent (407) is connected to the inside of the single-way pipe (404) and the double-way pipe (405) to blow the top of the plastic bag.

6. A packaging and printing device according to claim 5, characterized in that: A spring (506) is connected between the air pressure end (503) and the lifting groove (502).

7. A packaging printing device according to claim 6, characterized in that: A straight groove (505) is provided through the side surface of the base (501), and the end of the air pressure terminal (503) is slidably distributed inside the straight groove (505).

8. A packaging printing device according to claim 7, characterized in that: A spherical joint (6) is fixed to the end of the two-way tube (405), a soft rubber nozzle (7) is fixed to the end of the air pressure end head (503), and the spherical joint (6) and the soft rubber nozzle (7) are squeezed and engaged.

9. A packaging and printing device according to claim 8, characterized in that: A retention zone (507) is provided on the side of the base (501), and the spherical joint (6) is slidably distributed inside the retention zone (507).

10. The method for using a packaging printing device according to claim 1, characterized in that: The following steps are involved: S1: starting the entire device, the conveyor platform (1) is running, and the plastic bags to be printed are conveyed to the bottom of the printing platform (2); S2: the printing machine (2) intermittently pushes the screen frame (3) to move vertically, and prints the print through the screen frame (3) to the top of the plastic bag; S3: When the screen frame (3) is pushed to move vertically, the shaping mechanism (4) starts automatically to squeeze and pull the two ends of the plastic bag below the screen frame (3), so that the plastic bag is smoothed and printed; S4: After the shaping mechanism (4) moves vertically along with the screen frame (3), it will dock with the pneumatic mechanism (5). At this time, the pneumatic mechanism (5) starts to inject air pressure into the shaping mechanism (4), thereby changing the state of the shaping mechanism (4) when it is reset and lifted, thereby preventing the shaping mechanism (4) and the plastic bag from adhering to each other due to static electricity. At the same time, the pneumatic mechanism (5) will blow on the surface of the plastic bag to accelerate the shaping of the printing.

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