Packaging bag printing machine and inking device thereof

Abstract

The utility model discloses a packaging bag printing machine and a plurality of inking devices thereof, which enable a packaging bag film to pass through each inking device in sequence to be printed with printing ink of various colors, each inking device comprises a machine base, a printing ink disc, a thinner container and a water pump, and an ink transfer roller immersed in the printing ink disc is arranged on the machine base; the water pump is communicated with the thinner container through a liquid pumping pipe, a control valve is arranged at the joint of the water pump and the liquid pumping pipe, the water pump is further communicated with a liquid conveying pipe facing the ink disc, and thinner in the thinner container can be pumped into the liquid conveying pipe by the water pump so as to be discharged into the ink disc. Therefore, the ink supply device replaces manual work to realize automatic supplement of the thinner in each inking disc, so that the labor cost is reduced, and the working efficiency is improved; by means of the compilability of the control valve, accurate control over the adding amount of the thinner and timed adding can be achieved, the thinner supply stability is kept, the ink consistency change amplitude is controlled, the printing quality is guaranteed, the yield of packaging bag finished products is guaranteed, and large-scale mass production of packaging bags is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bag printing, in particular to a packaging bag printing machine and an inking device thereof. Background Art

[0002] Due to its beautiful appearance, convenient use, low cost and other characteristics, the packaging bag is favored by the majority of consumers and is widely used in the fields of daily consumer goods such as food and medicine. The packaging bag printing machine is used to print product logos and other patterns and production information and other texts on the packaging bag film.

[0003] The packaging bag printing machine often includes a plurality of inking devices, which respectively correspond to inks used to print various colors on the surface of the packaging bag film. The ink transfer roller in the inking device is immersed in an ink tray filled with ink, and the ink transfer roller transfers the ink to the inking roller that abuts and adheres tightly to it. The roller surface of the inking roller is provided with a concave pattern or a convex pattern corresponding to the required printing. The ink is smeared on the concave pattern or the convex pattern, and the ink on the pattern is smeared on the surface of the packaging bag film through the pressure between the inking roller and the guide roller for transporting the packaging bag film, achieving the printing effect. After the packaging bag film is sent out from the unwinding device, it passes through a plurality of inking devices in sequence. Each time the packaging bag film passes through an inking device, a pattern of a corresponding color will be printed. Finally, after the ink dries, it is wound up by the winding device.

[0004] Thinner, also known as banana oil, has strong dissolving ability and can be miscible with a variety of organic solvents. It can be used as a solvent and diluent for ink to help adjust the viscosity and fluidity of the ink. Since thinner is a volatile liquid, thinner needs to be replenished in the ink tray from time to time.

[0005] In the prior art, it is often necessary to manually replenish thinner into the ink trays of the packaging bag printing machine at regular intervals. The number of ink trays corresponds to the number of inking devices. Frequently replenishing thinner into multiple ink trays will undoubtedly affect the operation efficiency, increase the labor cost, and is not conducive to the large-scale mass production of packaging bags. Content of the Utility Model

[0006] In view of this, the purpose of the present utility model is to provide a packaging bag printing machine and an inking device thereof to solve the above problems.

[0007] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0008] The present utility model provides an inking device for a packaging bag printing machine, and the inking device includes a machine base, an ink tray, a thinner container and a water pump.

[0009] An ink transfer roller is installed on the machine base; the ink tray is fixedly mounted on the machine base, and the ink transfer roller is immersed in the ink contained in the ink tray; the thinner container is used to hold thinner; the water pump is connected to the thinner container through a liquid suction pipe, a control valve is provided at the interface between the water pump and the liquid suction pipe, the water pump is also connected to an infusion pipe, the orifice of the infusion pipe faces the ink tray, and the water pump is used to pump the thinner in the thinner container to the infusion pipe and discharge it into the ink tray.

[0010] Preferably, a plurality of first pipe clamping seats are provided on the machine base, and the first pipe clamping seats are used to clamp and fix the infusion pipe, so that the orifice of the infusion pipe hangs above the ink tray.

[0011] Preferably, the control valve is electrically connected to a programmable logic controller, and the programmable logic controller is used to control the opening and closing of the control valve at regular intervals.

[0012] Preferably, several second pipe clamping seats are provided on the edge of the side of the ink tray facing the thinner container, and the several second pipe clamping seats are arranged at intervals along the length direction of the ink tray.

[0013] Preferably, the water pump is an electric pump electrically connected to the programmable logic controller, the liquid suction pipe and the infusion pipe are rubber hoses, and the thinner container is a thinner storage tank.

[0014] Preferably, rotating shaft seats are provided on the two side walls of the ink tray, a rotating shaft is rotatably connected to the rotating shaft seats, a scraping plate is fixed on the shaft surface of the rotating shaft, rotating handles are provided at both ends of the rotating shaft, and the scraping plate can be driven by the rotating handle to rotate with the rotating shaft to contact the surface of the ink transfer roller, so as to scrape off the ink on the surface of the ink transfer roller.

[0015] Preferably, the inking device further includes an inking roller and a guide roller that are horizontally installed on the machine base side by side with the ink transfer roller, the roller surface of the inking roller abuts against the roller surface of the ink transfer roller, a vertical displacement groove is formed on the machine base, and both ends of the guide roller can move along the vertical displacement groove under the drive of a motor to control the roller surface of the guide roller to approach and abut against the roller surface of the inking roller.

[0016] The present invention also provides a packaging bag printing machine, which includes a plurality of the above-mentioned inking devices.

[0017] The technical effects achieved by the technical solution of the present invention mainly include:

[0018] The ink application device uses a thinner container, a liquid suction pipe, a water pump, a control valve, and an infusion pipe to form a liquid supplement mechanism for automatically supplementing thinner to the ink tray. The water pump can pump the thinner in the thinner container through the liquid suction pipe to the infusion pipe and then flow into the ink tray. It replaces the manual method in the prior art where operators need to add thinner to the ink trays of each ink application device at regular intervals, realizing the automation of thinner supplementation, effectively reducing labor costs, improving the work efficiency of operators, and adapting to the large-scale production and processing of packaging bags.

[0019] The control valve can be compiled and controlled by a control center such as a PLC to realize the timed opening and closing of the water pump and accurately control the flow rate of the thinner. The thinner supply is stable, ensuring the stability of the ink consistency, avoiding adverse effects caused by changes in ink consistency, and guaranteeing the printing quality of the packaging bags. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the ink application device provided by an embodiment of the present invention;

[0021] Figure 2 corresponds to Figure 1 a partial enlarged view of the circular dotted line frame area in

[0022] Figure 3 is a schematic diagram of the ink tray and the ink transfer roller in the ink application device.

[0023] The reference numerals in the above-mentioned drawings are as follows:

[0024] Machine base 1, ink transfer roller 11, ink application roller 12, guide roller 13, motor 14, ink tray 2, rotating shaft seat 21, rotating shaft 22, rotating handle 221, scraper 23, thinner container 3, water pump 4, liquid suction pipe 51, infusion pipe 52, first pipe clamping seat 61, second pipe clamping seat 62. Detailed Embodiment

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will describe the detailed embodiments of the present invention in conjunction with the drawings. Examples of these preferred embodiments are illustrated in the drawings. The embodiments of the present invention shown in the drawings and described according to the drawings are merely exemplary, and the present invention is not limited to these embodiments.

[0026] To avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the drawings, while other details of little relevance are omitted.

[0027] Refer to Figure 1 and Figure 2As shown in the figure, an ink application device for a packaging bag printing machine is provided in an embodiment of the present utility model. The ink application device includes a machine base 1, an ink tray 2, a thinner container 3, and a water pump 4.

[0028] A transfer ink roller 11 is installed on the machine base 1. The transfer ink roller 11 is arranged horizontally, and both ends of the transfer ink roller 11 are respectively rotatably connected to both ends of the side wall of the machine base 1 in a corresponding manner; the ink tray 2 is fixedly mounted on the machine base 1, and the transfer ink roller 11 is immersed in the ink contained in the ink tray 2; the thinner container 3 is used to hold thinner; the water pump 4 is connected to the thinner container 3 through a liquid suction pipe 51. A control valve is provided at the interface between the water pump 4 and the liquid suction pipe 51. The water pump 4 is further connected to a liquid delivery pipe 52. The nozzle of the liquid delivery pipe 52 faces the ink tray 2. The water pump 4 is used to pump the thinner in the thinner container 3 to the liquid delivery pipe 52 and discharge it into the ink tray 2.

[0029] In the above ink application device for a packaging bag printing machine, by providing a thinner container 3, a liquid suction pipe 51, a water pump 4, a control valve, and a liquid delivery pipe 52, a liquid supplement mechanism for automatically supplementing thinner to the ink tray 2 is formed. The control valve is used to open and close the water pump 4 regularly, so that the thinner in the thinner container 3 can be automatically delivered to the ink tray 2 through the liquid suction pipe 51 and the liquid delivery pipe 52 regularly without manual operation by the operator to add thinner to the ink box, which can improve the operation efficiency, reduce the labor cost, and is beneficial to the large-scale production of packaging bags. Moreover, the ink application device can control the flow rate by presetting the output of the water pump. Compared with manual addition of thinner, the control of the added dose of thinner is more accurate, ensuring the quality of the finished packaging bags.

[0030] Furthermore, a plurality of first pipe clamping seats 61 are provided on the machine base 1. The first pipe clamping seats 61 are used to clamp the liquid delivery pipe 52 for fixation, so that the nozzle of the liquid delivery pipe 52 hangs above the ink tray 2. Since the transfer ink roller 11 is located above the ink tray 2, the nozzle of the liquid delivery pipe 52 can extend into the empty space of the ink tray 2 to avoid the transfer ink roller 11. By using the plurality of first pipe clamping seats 61 fixedly attached to the machine base 1, the liquid delivery pipe 52 can be clamped to facilitate the layout of the pipeline, so that the thinner flowing out of the nozzle of the liquid delivery pipe 52 can freely fall into the ink tray 2.

[0031] Still further, several second pipe clamping seats 62 are provided on the edge of the side of the ink tray 2 facing the thinner container 3. The several second pipe clamping seats 62 are arranged at intervals along the length direction of the ink tray 2 and are arranged in the same direction as the horizontally arranged transfer ink roller 11. The operator can select the second pipe clamping seat 62 at the corresponding position to fix the liquid delivery pipe 52 according to the required position for adding thinner, so as to adjust the position of the nozzle of the liquid delivery pipe 52.

[0032] The circuit implementation of automatic opening and closing control of a control valve using a programmable logic controller is a mature technology in the field. Therefore, in this embodiment, the control valve is electrically connected to a programmable logic controller, and the programmable logic controller is used to control the opening and closing of the control valve at a fixed time.

[0033] In this embodiment, the water pump 4 is an electric pump electrically connected to the programmable logic controller. The control valve is integrated on the water pump 4 and can be centrally controlled by the same control center. The liquid extraction tube 51 and the liquid infusion tube 52 are rubber tubes. Rubber tubes are common liquid transmission hoses, which are convenient for adjusting the pipeline layout according to needs. The thinner water container 3 is a thinner water storage tank. Common thinner water storage tanks are designed according to the toxic and volatile properties of thinner water, such as food-grade stainless steel tanks and plastic tanks, to ensure the safety of the working environment.

[0034] Combination Figures 1 to 3 As shown, a shaft seat 21 is provided on both side walls of the ink tray 2, a shaft 22 is rotatably connected to the shaft seat 21, a scraper 23 is fixed on the axial surface of the shaft 22, a rotating handle 221 is provided at both ends of the shaft 22, and the scraper 23 and the corresponding hinge structure are provided on the other side of the ink tray 2 relative to the second pipe clamping seat 62. The scraper 23 can be driven by the rotating handle 221 to rotate with the shaft 22 until it contacts the surface of the ink transfer roller 11, so as to scrape off the ink on the surface of the ink transfer roller 11, so that the unused coated ink quickly falls back into the ink tray 2, and avoids ink adhesion. For example, a stirring component is also fixed on the axial surface of the shaft, and the stirring component can be used to stir the ink and thinner in the ink tray 2, so that the thinner and ink are mixed more evenly.

[0035] The inking device also includes an inking roller 12 and a guide roller 13 which are laterally mounted on the machine base 1 in parallel with the ink transfer roller 11. The roller surface of the inking roller 12 abuts against the roller surface of the ink transfer roller 11. The roller surface of the inking roller is provided with a pattern corresponding to the required printing. For example, in a gravure printing machine commonly used in packaging bag production, ink is applied to a concave pattern provided on the roller surface of the inking roller. A vertical displacement groove is provided on the machine base 1. The two ends of the guide roller 13 can be moved along the vertical displacement groove by the drive of the motor 14 to control the roller surface of the guide roller 13 to approach the roller surface of the inking roller 12 and abut against it. The packaging bag film is tensioned and transferred through the guide roller 13. When the roller surface of the guide roller 13 abuts against the roller surface of the ink roller 12, the packaging bag film between the two will be covered with ink of the corresponding pattern under the pressing action of the inking roller 12 and the guide roller 13.

[0036] The utility model also provides a packaging bag printing machine, which includes a plurality of the above-mentioned inking devices, which are arranged in sequence front to back so that the packaging bag film passes through each inking device in turn and is printed with a pattern of corresponding color.

[0037] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0038] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. An inking device for a packaging bag printing machine, characterized in that: The inking device comprises: A machine base (1), wherein an ink transfer roller (11) is mounted on the machine base (1); An ink tray (2), the ink tray (2) being mounted and fixed on the machine base (1), and the ink transfer roller (11) being immersed in the ink contained in the ink tray (2); A thinner water container (3), wherein the thinner water container (3) is used to contain thinner water; A water pump (4), the water pump (4) is connected to the thinner water container (3) through a liquid extraction pipe (51), a control valve is provided at the interface between the water pump (4) and the liquid extraction pipe (51), the water pump (4) is also connected to a liquid infusion pipe (52), the pipe mouth of the liquid infusion pipe (52) faces the ink tray (2), and the water pump (4) is used to pump the thinner water in the thinner water container (3) to the liquid infusion pipe (52) so as to be discharged into the ink tray (2).

2. The inking device of the packaging bag printing machine according to claim 1, characterized in that: A plurality of first pipe clamping seats (61) are arranged on the machine base (1), and the first pipe clamping seats (61) are used to clamp the infusion pipe (52) for fixing so that the pipe mouth of the infusion pipe (52) is suspended above the ink tray (2).

3. The inking device of the packaging bag printing machine according to claim 1, characterized in that: The control valve is electrically connected to a programmable logic controller, and the programmable logic controller is used to control the opening and closing of the control valve at a fixed time.

4. The inking device of the packaging bag printing machine according to claim 2, characterized in that: A plurality of second pipe clamping seats (62) are arranged on the edge of the ink tray (2) facing the thinner water container (3), and the plurality of second pipe clamping seats (62) are arranged at intervals along the length direction of the ink tray (2).

5. The inking device of the packaging bag printing machine according to claim 3, characterized in that: The water pump (4) is an electric pump electrically connected to the programmable logic controller, the liquid extraction tube (51) and the liquid infusion tube (52) are rubber tubes, and the thinner water container (3) is a thinner water storage tank.

6. The inking device of the packaging bag printing machine according to claim 1, characterized in that: A rotating shaft seat (21) is arranged on the side walls of both sides of the ink tray (2), a rotating shaft (22) is rotatably connected to the rotating shaft seat (21), a scraper (23) is fixed on the axial surface of the rotating shaft (22), and rotating handles (221) are arranged at both ends of the rotating shaft (22). The scraper (23) can be driven by the rotating handles (221) to rotate with the rotating shaft (22) until it contacts the surface of the ink transfer roller (11) to scrape off the ink on the surface of the ink transfer roller (11).

7. The inking device of the packaging bag printing machine according to claim 5, characterized in that: The inking device also includes an inking roller (12) and a guide roller (13) which are transversely mounted on the machine base (1) in parallel with the ink transfer roller (11); the roller surface of the inking roller (12) abuts against the roller surface of the ink transfer roller (11); a vertical displacement groove is provided on the machine base (1); the two ends of the guide roller (13) can be moved along the vertical displacement groove by the drive of a motor (14) to control the roller surface of the guide roller (13) to approach the roller surface of the inking roller (12) and abut against it.

8. A packaging bag printing machine, characterized in that: The invention comprises a plurality of inking devices according to any one of claims 1 to 7.

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