Surface printing device for carton production

Abstract

The utility model discloses a surface printing device for carton production, and particularly relates to the technical field of carton production printing equipment.The surface printing device comprises a paperboard feeding unit and a printing unit, the printing unit comprises a rack, and an ink box is fixedly installed in the rack; a material supplementing assembly is arranged between the ink box and the rack; an adjusting assembly is arranged in the material supplementing assembly; a circulating assembly is arranged between the material supplementing assembly and the ink box; by arranging the material supplementing assembly, the adjusting assembly and the circulating assembly, accurate control over the ink adding amount is achieved, so that the device adapts to printing plates with different patterns and cartons made of different materials, and the applicability of the device is improved. And the liquid level line of the printing ink and the internal circulation of the printing ink can be automatically kept, so that the liquid level line of the printing ink is kept unchanged all the time, the phenomena of deposition, separation and the like of the printing ink are avoided, the printing plate is more uniform and stable during inking, and the uniformity of ink colors during continuous printing is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of carton production and printing equipment, and particularly relates to a surface printing device for carton production. Background Art

[0002] A printing press is a machine for printing text and images. The surface printing press for carton production generally consists of mechanisms such as plate mounting, ink coating, imprinting, and paper feeding. Its working principle is as follows: First, the text and images to be printed are made into printing plates and installed on the printing press. Then, the ink is applied to the areas with text and images on the printing plate by manual or the printing press. Next, it is directly or indirectly transferred to the cardboard, thereby replicating the same printed matter as the printing plate for printing on the surface of the carton.

[0003] The uniformity of the ink on the printing plate is an important factor affecting the printing clarity of the carton surface. The factors affecting the ink uniformity are as follows:

[0004] 1. Ink addition: Traditional ink addition is mostly completed manually. However, when adding ink manually, it is difficult to ensure the amount of ink added. There are problems of adding too much or too little ink. If too much ink is added, the contact area between the ink and the ink roller is too large, which will lead to increased wear of the ink roller and the ink may accumulate on the ink roller. When the ink is transferred from the ink roller to the printing plate, it cannot be evenly distributed, resulting in poor ink color uniformity on the carton surface. If too little ink is added, phenomena such as missing printing may occur.

[0005] 2. Continuous printing: With the increase in the number of printing times, the ink in the ink cartridge gradually wears out, and the contact area between the ink and the ink roller decreases. It is necessary to manually replenish the ink, which is rather troublesome and will affect the printing efficiency. Moreover, if the ink stands for too long, sedimentation and segregation phenomena will occur in the ink, resulting in uneven ink color of the printed pattern on the cardboard surface.

[0006] 3. Printing plate pattern and carton material: When the printing device is in use, due to the different printing plate patterns and carton materials, the pressure of the ink roller and the supply amount of the ink need to be adjusted accordingly to ensure that the graphic part of the printing plate obtains continuous, uniform, and appropriate ink, so as to obtain printed matter with consistent ink color. However, the existing printing devices are difficult to adjust the supply amount of the ink in the ink cartridge, and the adaptability is poor. Summary of the Invention

[0007] The main object of the present invention is a surface printing device for carton production, which is used to solve the problem that it is difficult to control the uniformity of the ink on the printing plate mentioned in the background art.

[0008] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A surface printing device for carton production, including a feeding unit for cardboard and a printing unit. The printing unit includes a frame, and an ink cartridge is fixedly installed inside the frame;

[0010] A replenishing component is arranged between the ink cartridge and the frame for automatically replenishing the ink in the ink cartridge;

[0011] The replenishing component includes an air inlet pipe. An adjusting component is arranged between the air inlet pipe and the frame for adjusting the height of the air inlet pipe in the ink cartridge;

[0012] The replenishing component includes an ink storage tank. A circulating component is arranged between the ink storage tank and the ink cartridge for the internal circulation of the ink between the ink cartridge and the ink storage tank;

[0013] One end of the air inlet pipe is located above the ink cartridge, and the other end is connected to the top end of the ink storage tank. The feeding component further includes an ink inlet pipe. One end of the ink inlet pipe is inserted inside the ink cartridge, and the other end is connected to the bottom end of the ink storage tank.

[0014] Furthermore, the replenishing component includes an ink storage tank. The ink storage tank is fixedly installed on one side of the frame. A plurality of support seats are fixedly installed at the bottom end of the ink storage tank. The top end of the ink storage tank is fixedly connected with an air inlet pipe. A valve I is arranged on the air inlet pipe. The bottom end of the ink storage tank is fixedly connected with an ink inlet pipe. A valve II is arranged on the ink inlet pipe.

[0015] Furthermore, the adjusting component includes a movable groove. The movable groove is opened on the surface of one end of the air inlet pipe. An adjusting pipe is slidably installed in the movable groove. One end of the air inlet pipe close to the ink cartridge is rotatably installed with an adjusting piece. The adjusting piece is meshed and connected with an adjusting gear. The top end of the adjusting gear is fixedly connected with an adjusting rod. The top end of the adjusting rod is fixedly installed with an adjusting motor.

[0016] Furthermore, the circulating component includes a feeding pipe. One end of the feeding pipe is fixedly connected to the bottom end inside the ink cartridge. The other end of the feeding pipe is fixedly connected with a circulating pump. The water outlet of the circulating pump is connected with a circulating pipe. The circulating pipe is fixedly connected with the ink storage tank.

[0017] Furthermore, a baffle is fixedly connected to the outer surface of the adjusting pipe at a position close to the bottom end. External threads and smooth parts are respectively arranged on the outer surface of the adjusting pipe above and below the baffle. Internal threads are opened on the inner surface of the adjusting piece. The external threads are adapted to the internal threads.

[0018] Furthermore, a indicating rod is threadedly connected to the surface of the adjusting rod. The indicating rod penetrates through one side of the frame and is slidably connected with the frame.

[0019] Further, the circulation component further includes a driving motor, which is fixedly installed at the top of the ink storage tank, and a stirring member is fixedly installed on the output shaft of the driving motor.

[0020] Further, a first three-way valve is provided on the feed pipe, and a second three-way valve is provided on the circulation pipe.

[0021] Further, a printing roller is rotatably installed in the frame, a printing plate is detachably installed on the surface of the printing roller, an impression roller is provided at the top end inside the frame, and an ink roller is rotatably installed at the top of the ink cartridge inside the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a front schematic view of the overall structure of a surface printing device for carton production according to the present invention;

[0023] Figure 2 is a back schematic view of the overall structure of a surface printing device for carton production according to the present invention;

[0024] Figure 3 is a sectional schematic view of a surface printing device for carton production according to the present invention;

[0025] Figure 4 is an overall schematic view of an ink cartridge and its connection structure of a surface printing device for carton production according to the present invention;

[0026] Figure 5 is a surface printing device for carton production according to the present invention Figure 4 partial sectional structure schematic diagram;

[0027] Figure 6 is a schematic view of the feeding component structure of a surface printing device for carton production according to the present invention;

[0028] Figure 7 is a schematic view of the circulation component structure of a surface printing device for carton production according to the present invention;

[0029] Figure 8 is an overall schematic view of the adjustment component of a surface printing device for carton production according to the present invention;

[0030] Figure 9 is a split structure schematic view of the adjustment component of a surface printing device for carton production according to the present invention.

[0031] In the figure: 1. Printing unit; 101. Frame; 102. Printing roller; 103. Printing plate; 104. Ink cartridge; 105. Ink roller; 106. Impression roller; 2. Feeding component; 3. Adjusting component; 4. Circulation component; 201. Support base; 202. Ink storage tank; 203. Air inlet pipe; 204. Valve 1; 205. Ink inlet pipe; 206. Valve 2; 301. Movable groove; 302. Adjusting pipe; 3021. Smooth part; 3022. Baffle; 3023. External thread; 303. Adjusting part; 304. Internal thread; 305. Adjusting gear; 306. Adjusting rod; 307. Adjusting motor; 308. Schematic rod; 401. Feed pipe; 402. Three-way valve 1; 403. Circulation pump; 404. Circulation pipe; 405. Three-way valve 2; 406. Driving motor; 407. Stirring part. Detailed implementation mode

[0032] As Figures 1-9 shown, a surface printing device for carton production includes a feeding unit for cardboard and a printing unit 1. The feeding unit stably conveys the cardboard into the printing unit 1, and the printing unit 1 is used for printing the surface of the cardboard. The printing unit 1 includes a frame 101, an ink cartridge 104 is fixedly installed in the frame 101, and a feeding component 2 is arranged between the ink cartridge 104 and the frame 101 to automatically supplement the ink in the ink cartridge 104, so that the ink in the ink cartridge 104 is always at the same horizontal level, so that the ink transferred to the printing plate 103 is more uniform, thereby improving the clarity and stability of printing.

[0033] The feeding component 2 includes an air inlet pipe 203, and an adjusting component 3 is arranged between the air inlet pipe 203 and the frame 101 to adjust the height of the ink water surface in the ink cartridge 104, so that the contact area between the ink roller 105 and the ink can be changed, so as to change the thickness and uniformity of the ink layer formed on the ink roller 105, so as to adapt to printing plates 103 with different patterns and cartons of different materials.

[0034] The feeding component 2 includes an ink storage tank 202, and a circulation component 4 is arranged between the ink storage tank 202 and the ink cartridge 104, so that the ink in the ink cartridge 104 can continuously circulate and be stirred, thus effectively avoiding phenomena such as ink deposition and segregation, and improving the printing effect.

[0035] As Figures 1-5As shown in the figure, an ink storage tank 202 is installed on one side of the frame 101. A plurality of support seats 201 are fixedly installed at the bottom end of the ink storage tank 202. Preferably, there are three support seats 201, and they are in the shape of a frustum of a cone, making the support effect more stable. At the same time, the support seats 201 make the bottom end of the ink storage tank 202 higher than the top end of the ink cartridge 104. The top end of the ink storage tank 202 is fixedly connected to an air inlet pipe 203. One end of the air inlet pipe 203 is located at the top end inside the ink storage tank 202, and the other end is located at the top end of the ink cartridge 104. A valve 204 is provided on the air inlet pipe 203, and through the valve 204, it can be controlled whether the ink storage tank 202 is connected to the outside air. The bottom end of the ink storage tank 202 is fixedly connected to an ink inlet pipe 205. One end of the ink inlet pipe 205 is located at the bottom end inside the ink storage tank 202, and the other end is located at a position near the bottom end inside the ink cartridge 104. A valve 206 is provided on the ink inlet pipe 205. The valve 206 is used to control whether the ink in the ink inlet pipe 205 is connected to the ink storage tank 202. Cooperating with the valve 204, it can control the opening and closing of the feeding assembly 2 and the feeding of the ink storage tank 202.

[0036] The air inside and outside the ink storage tank 202 is connected to the ink cartridge 104 through the air inlet pipe 203 and the ink inlet pipe 205. When the ink liquid level in the ink cartridge 104 is lower than the bottom end of the air inlet pipe 203, the ink storage tank 202 is connected to the outside through the air inlet pipe 203. The ink storage tank 202, the ink inlet pipe 205 and the ink cartridge form a structure similar to a U-shaped tube. Since the bottom end of the ink storage tank 202 is higher than the top end of the ink cartridge 104, under the action of gravity, the ink is transmitted into the ink cartridge 104 through the ink inlet pipe 205. When the ink in the ink cartridge 104 is higher than the bottom end of the air inlet pipe 203, the connection between the outside air and the ink storage tank 202 is no longer there, and the inside of the ink storage tank 202 is in a sealed state. Under the action of atmospheric pressure, the ink in the ink storage tank 202 and the ink in the ink cartridge 104 are in a state of air pressure balance, and the ink no longer flows. When the ink is consumed and the liquid level is lower than the bottom end of the air inlet pipe 203, air can enter the ink storage tank 202 through the air inlet pipe 203. The air pressure balance between the ink storage tank 202 and the ink cartridge 104 is destroyed, and the ink enters the ink cartridge 104 through the ink inlet pipe 205 until the liquid level in the ink cartridge 104 is higher than the bottom end of the air inlet pipe 203, making the liquid level line in the ink cartridge 104 remain constant.

[0037] As Figure 9As shown, the adjusting component 3 includes a movable slot 301 which is opened on the surface of one end of the air inlet pipe 203. A regulating pipe 302 is slidably installed in the movable slot 301. The length of the movable slot 301 is longer than that of the regulating pipe 302. The contact surface between the regulating pipe 302 and the movable slot 301 is a "T" - shaped structure (not shown in the figure), so that the regulating pipe 302 can only slide along the movable slot 301 and cannot rotate. One end of the air inlet pipe 203 near the ink cartridge 104 is rotatably installed with an adjusting member 303, and several toothed rings are arranged on the outer side of the surface of the adjusting member 303. The adjusting member 303 is meshed with an adjusting gear 305. Through the meshing connection between the adjusting gear 305 and the surface of the adjusting member 303, the adjusting gear 305 can drive the adjusting member 303 to rotate. The top of the adjusting gear 305 is fixedly connected with an adjusting rod 306, and the top of the adjusting rod 306 is fixedly installed with an adjusting motor 307. As Figure 8 shown, the adjusting motor 307 is fixedly installed inside the frame 101, and the adjusting rod 306 is rotatably installed inside the frame 101, so that both the adjusting motor 307 and the adjusting rod 306 can work stably.

[0038] As Figures 4-7 shown, the circulating component 4 includes a feed pipe 401. One end of the feed pipe 401 is fixedly connected to the inner bottom end of the ink cartridge 104. The inside of the ink cartridge 104 is an inclined structure. On the one hand, it makes the volume of the ink cartridge 104 smaller, stores less ink, and is adjusted faster. On the other hand, it makes the ink quickly enter the feed pipe 401 along the inclined plane under the action of gravity, and the circulating speed is faster. The other end of the feed pipe 401 is fixedly connected with a circulating pump 403 for pumping the ink in the ink cartridge 104. The water outlet of the circulating pump 403 is connected with a circulating pipe 404, and the circulating pipe 404 is fixedly connected with the ink storage tank 202. The ink pumped by the circulating pump 403 enters the ink storage tank 202 through the circulating pipe 404 and then circulates through the feeding component 2.

[0039] As Figure 9 shown, a baffle 3022 is fixedly connected to the outer surface of the regulating pipe 302 near the bottom end. External threads 3023 and a smooth part 3021 are respectively arranged on the outer surface of the regulating pipe 302 above and below the baffle 3022. The baffle 3022 plays a protective role, so that the ink in the ink cartridge 104 does not contact the external threads 3023, which can avoid the corrosion of the external threads 3023 by the ink and improve the service life of the regulating pipe 302. Internal threads 304 are opened on the inner surface of the adjusting member 303 and are adapted to the external threads 3023. Thus, when the adjusting member 303 rotates, it can drive the regulating pipe 302 to rotate through the threaded connection, thereby adjusting the height of the regulating pipe 302.

[0040] As Figure 9As shown, a indicating rod 308 is threadedly connected to the surface of the adjusting rod 306. The pitch of the thread on the surface of the adjusting rod 306 is equal to that of the external thread 3023. Therefore, the lifting height of the indicating rod 308 is the same as that of the adjusting tube 302. The indicating rod 308 penetrates through one side of the frame 101 and is slidably connected to the frame 101, so as to facilitate the observation of the indicating rod 308 outside the frame 101, and thus the position of the adjusting tube 302 can be quickly and conveniently confirmed.

[0041] As Figure 6 shown, a driving motor 406 is provided at the top end of the ink storage tank 202. A stirring member 407 is fixedly installed on the output shaft of the driving motor 406, which can stir the ink in the ink storage tank 202, thereby avoiding the phenomena of ink precipitation and segregation, and effectively improving the uniformity of the ink.

[0042] As Figure 7 shown, a three-way valve 402 is provided on the feed pipe 401, which can be switched between circulation and supplementing ink into the ink storage tank 202, avoiding manual ink supplementation and ensuring the sealing performance of the ink storage tank 202. A three-way valve 405 is provided on the circulation pipe 404, which can be switched between circulation and pumping out ink, facilitating pumping out the ink for proper storage after shutdown.

[0043] As Figure 3 shown, a printing roller 102 is rotatably installed in the frame 101. A printing plate 103 is detachably installed on the surface of the printing roller 102. Different patterns can be printed on the surface of the cardboard box by disassembling and installing printing plates 103 with different patterns. An impression roller 106 is provided at the top end inside the frame 101. The impression roller 106 is used to convey the cardboard and provide appropriate pressure to ensure the printing quality. A ink roller 105 is rotatably installed at the top of the ink cartridge 104 inside the frame 101. The ink roller 105 is in contact with the printing plate 103, and the ink can be transferred to the printing plate 103 through the ink roller 105, thereby performing printing.

[0044] It should be noted that the present invention is a surface printing device for cardboard box production, which can automatically supplement the ink in the ink cartridge 104, and at the same time can perform internal circulation of the ink between the ink cartridge 104 and the ink storage tank 202, and the ink is stirred in the ink storage tank 202 to avoid ink deposition and segregation. And the liquid level line of the ink can be controlled, so as to control the contact area between the ink roller 105 and the ink, so as to adapt to different printing plates and cardboard box materials.

[0045] Its working principle is as follows: By adjusting the three-way valve 402, the circulation pump 403 is connected to the outside, and then the ink is connected through a pipeline. By closing the valve 206, the self-feeding component 2 does not work. Then, by starting the circulation pump 403, the ink can be conveyed into the ink storage tank 202, and ink can be supplemented during the printing process without affecting the printing.

[0046] After the ink replenishment is completed, the feed pipe 401 is connected by adjusting the three-way valve 402. The adjusting motor 307 is started. The adjusting motor 307 drives the adjusting gear 305 to rotate through the adjusting rod 306, thereby driving the adjusting member 303 to rotate. The adjusting member 303 makes the adjusting pipe 302 slide along the movable groove 301 through the internal thread 304, so that the position of the adjusting pipe 302 can be adjusted. When the adjusting rod 306 rotates, it will drive the indicating rod 308 and the adjusting pipe 302 to lift and lower synchronously. Thus, by observing the position of the indicating rod 308, the height of the adjusting pipe 302 can be judged, and the liquid level line of the ink in the ink cartridge 104 can be controlled to adapt to printing plates with different patterns and cardboard of different materials.

[0047] The first valve 204 and the second valve 206 are opened, so that the ink storage tank 202 is connected to the ink cartridge 104 through the air inlet pipe 203 and the ink inlet pipe 205. Under the action of atmospheric pressure, the ink enters the interior of the ink cartridge 104 through the ink inlet pipe 205. When the liquid level line in the ink cartridge 104 exceeds the bottom end of the adjusting pipe 302, the air is no longer connected to the ink storage tank 202, and the ink storage tank 202 is in a sealed state. At this time, the ink storage tank 202 and the ink cartridge 104 are in a state of air pressure balance, and the ink no longer enters the ink cartridge 104. As printing progresses, the ink in the ink cartridge 104 decreases, and the liquid level line drops, causing the air inlet pipe 203 to leak, and the air is reconnected to the interior of the ink storage tank 202. The ink is re-transported to the ink cartridge 104 through the ink inlet tank 205, so that the liquid level line in the ink cartridge 104 remains unchanged.

[0048] By adjusting the first three-way valve 402 and the second three-way valve 405, the feed pipe 401 and the circulation pipe 404 are connected. The circulation pump 403 and the drive motor 406 are started. Under the action of the circulation pump 403, the ink in the ink cartridge 104 enters the interior of the ink storage tank 202 through the feed pipe 401 and the circulation pipe 404. Driven by the drive motor 406, the stirring member 407 stirs the ink in the ink storage tank 202, avoiding the occurrence of ink deposition and segregation phenomena, making the ink in the ink cartridge 104 more uniform, and improving the printing effect.

[0049] During printing, the cardboard is continuously conveyed into the frame 101 through the feeding unit, contacts the printing plate 103 on the printing roller 102 through the conveyance of the impression roller 106. The ink roller 105 rotates, transports the ink from the ink cartridge 104 onto the printing plate 103, and then prints the pattern on the surface of the cardboard through the contact between the printing plate 103 and the surface of the cardboard.

[0050] The above embodiments of the present invention can achieve the following beneficial effects:

[0051] 1. By providing a feeding component, an adjusting component and a circulating component, the ink of the present invention is always in an internal circulation state, avoiding ink sedimentation and segregation. At the same time, the ink can always be in uniform and stable contact with the ink roller, and the contact area is adjustable, effectively improving the uniformity of the ink during printing and the applicability to printing plates with different patterns and the surfaces of cartons made of different materials.

[0052] 2. By providing a feeding component, the present invention can automatically feed the ink cartridge, keeping the liquid level line in the ink cartridge stable, so that the contact area between the ink roller and the ink remains unchanged, ensuring the uniformity of inking on the printing plate and effectively improving the uniformity of the ink color on the cardboard surface during continuous printing.

[0053] 3. By providing a feeding component in cooperation with an adjusting component, the present invention can control the liquid level line of the ink in the ink cartridge, thereby controlling the contact area between the ink roller and the ink to adapt to printing plates with different patterns and carton materials made of different materials, effectively improving the applicability.

[0054] 4. By providing a feeding component in cooperation with a circulating component, the ink of the present invention can be internally circulated between the ink cartridge and the ink storage tank, avoiding ink sedimentation and segregation. Moreover, through the first three-way valve and the second three-way valve, the ink storage tank can be replenished with ink without stopping the machine and the ink can be quickly taken out after printing is completed, simplifying the operation.

[0055] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A surface printing device for carton production, comprising a feeding unit for cardboard and a printing unit (1), characterized in that: The printing unit (1) includes a machine frame (101), and an ink cartridge (104) is fixedly installed inside the machine frame (101); A feeding component (2) is arranged between the ink cartridge (104) and the machine frame (101) for automatically supplementing the ink in the ink cartridge (104); The feeding component (2) includes an air inlet pipe (203), and an adjusting component (3) is arranged between the air inlet pipe (203) and the machine frame (101) for adjusting the height of the air inlet pipe (203) inside the ink cartridge (104); The feeding component (2) includes an ink storage tank (202), and a circulation component (4) is arranged between the ink storage tank (202) and the ink cartridge (104) for internal circulation of the ink between the ink cartridge (104) and the ink storage tank (202); One end of the air inlet pipe (203) is located above the ink cartridge (104), and the other end is connected to the top end of the ink storage tank (202). The feeding component (2) further includes an ink inlet pipe (205). One end of the ink inlet pipe (205) is inserted inside the ink cartridge (104), and the other end is connected to the bottom end of the ink storage tank (202).

2. The surface printing device for carton production according to claim 1, characterized in that: The feeding component (2) includes an ink storage tank (202). The ink storage tank (202) is fixedly installed on one side of the machine frame (101). A plurality of support seats (201) are fixedly installed at the bottom end of the ink storage tank (202). The top end of the ink storage tank (202) is fixedly connected with an air inlet pipe (203). A valve one (204) is arranged on the air inlet pipe (203). The bottom end of the ink storage tank (202) is fixedly connected with an ink inlet pipe (205). A valve two (206) is arranged on the ink inlet pipe (205).

3. The surface printing device for carton production according to claim 1, wherein: The adjusting component (3) includes a movable groove (301). The movable groove (301) is opened on the surface of one end of the air inlet pipe (203). An adjusting pipe (302) is slidably installed inside the movable groove (301). An adjusting member (303) is rotatably installed on the surface of the air inlet pipe (203) near the ink cartridge (104). The adjusting member (303) is meshed and connected with an adjusting gear (305). The top end of the adjusting gear (305) is fixedly connected with an adjusting rod (306). An adjusting motor (307) is fixedly installed at the top end of the adjusting rod (306).

4. A surface printing device for carton production according to claim 1, wherein: The circulation component (4) includes a feeding pipe (401). One end of the feeding pipe (401) is fixedly connected to the inner bottom end of the ink cartridge (104). The other end of the feeding pipe (401) is fixedly connected with a circulation pump (403). The water outlet of the circulation pump (403) is connected with a circulation pipe (404). The circulation pipe (404) is fixedly connected with the ink storage tank (202).

5. The surface printing device for carton production according to claim 3, characterized in that: A baffle (3022) is fixedly connected to the outer surface of the adjusting pipe (302) near the bottom end. External threads (3023) and a smooth part (3021) are respectively arranged on the outer surface of the adjusting pipe (302) above and below the baffle (3022). Internal threads (304) are opened on the inner surface of the adjusting member (303). The external threads (3023) are adapted to the internal threads (304).

6. The surface printing device for carton production according to claim 3, characterized in that: The surface of the adjusting rod (306) is threadedly connected with a indicating rod (308), and the indicating rod (308) penetrates through one side of the frame (101) and is slidably connected with the frame (101).

7. A surface printing device for carton production according to claim 4, characterized in that: The circulating assembly (4) further includes a driving motor (406), the driving motor (406) is fixedly installed at the top of the ink storage tank (202), and a stirring member (407) is fixedly installed on the output shaft of the driving motor (406).

8. A surface printing device for carton production according to claim 4, characterized in that: A first three-way valve (402) is provided on the feed pipe (401), and a second three-way valve (405) is provided on the circulating pipe (404).

9. A surface printing device for carton production according to claim 1, characterized in that: A printing roller (102) is rotatably installed in the frame (101), a printing plate (103) is detachably installed on the surface of the printing roller (102), an impression roller (106) is provided at the top end inside the frame (101), and an ink roller (105) is rotatably installed at the top of the ink cartridge (104) inside the frame (101).

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