A digital printing device and method for a tank body

Abstract

The present invention relates to the technical field of beverage can production equipment, and specifically relates to a digital printing device and method for can bodies, including a control box group and a frame assembly installed in the control box group. A platform assembly is installed at the upper end of the frame assembly, and a main beam assembly slidably connected to the frame assembly is erected on the upper end of the platform assembly. A digital printing head is slidably connected to the main beam assembly. An automatic loading and unloading mechanism is installed at the rear side of the frame assembly, and the automatic loading and unloading mechanism supplies materials to the platform assembly. The control box group is electrically connected to the main beam assembly, the digital printing head, the frame assembly, the platform assembly, and the automatic loading and unloading mechanism. The present invention can complete high-precision automated printing operations on beverage can bodies on a horizontal plane, and multiple beverage cans can be printed simultaneously within the same time period. Moreover, feeding or discharging operations can be carried out synchronously during printing, further shortening the printing time of beverage cans and simultaneously improving the printing efficiency of beverage cans and the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of production equipment for pop-top cans, and particularly to a digital printing device and method for can bodies. Background Art

[0002] A pop-top can is a packaging bottle for bottled beverages or beers that originated in the United States. They are generally made of lightweight and soft aluminum materials. As a packaging bottle, the greatest advantage of a pop-top can is its good sealing performance, cleanliness, and light weight.

[0003] During the production process of pop-top cans, it is usually necessary to print patterns on the surface of the can body to make the pop-top cans more beautiful. A can body printing device is often required. The currently used can body printing device usually drives the pop-top can to roll along a falling guide rail, and multiple printing rollers are arranged on the rolling path to print the pop-top can. This printing method has a low printing accuracy and often has a poor printing effect for relatively delicate patterns. Another commonly used hard brush method is to fixedly clamp the pop-top can through a fixture. When clamping, the pop-top can is moved between multiple mutually cooperating printing nozzles, and the pop-top can is synchronously printed by the multiple printing nozzles to print relatively delicate patterns. However, in this printing method, only one pop-top can can be printed by a single device at the same time, and the printing efficiency is low. Summary of the Invention

[0004] The purpose of the present invention is to provide a digital printing device and method for can bodies to solve the problems raised in the above background art.

[0005] The technical solution of the present invention is: a digital printing device for a tank body, including a control box group and a frame assembly installed in the control box group. A platform assembly is installed at the upper end of the frame assembly. A main beam assembly slidably connected to the frame assembly is erected on the upper end of the platform assembly. A digital printing head is slidably connected to the main beam assembly. An automatic loading and unloading mechanism is installed at the rear side of the frame assembly. The automatic loading and unloading mechanism supplies materials to the platform assembly. The control box group is electrically connected to the main beam assembly, the digital printing head, the frame assembly, the platform assembly, and the automatic loading and unloading mechanism. The platform assembly includes a multi-station rotating table and a pressing member. The pressing member is used to cooperate with the multi-station rotating table to clamp the aluminum can body. The multi-station rotating table includes a turntable, a flat plate, and a rotating clamping mechanism. The lower end of the turntable is detachably fixed to the frame assembly. The flat plate is erected on the turntable and fixed to the output shaft of the turntable. Multiple groups of rotating clamping mechanisms are provided and are circumferentially arranged in an array on the surface of the flat plate. The rotating clamping mechanism includes a motor, a reducer, a driving wheel, a driven wheel, a synchronous belt, and a rotating clamp. The motor is fixed to the upper surface of the flat plate. The output shaft of the motor is fixed to the input shaft of the reducer. The output shaft of the reducer is fixed to the driving wheel. The synchronous belt is sleeved outside the driving wheel and the driven wheels. Multiple driven wheels are provided and are symmetrically distributed with respect to the driving wheel. Multiple rotating clamps are provided and the number thereof is equal to the sum of the number of driven wheels and the number of driving wheels. The driving wheel and the multiple driven wheels are respectively fixed to one end of the multiple rotating clamps.

[0006] Preferably, the automatic loading and unloading mechanism includes a feeding component and a loading and unloading component. The loading and unloading component includes a mounting plate fixed to the rear side of the frame assembly. A profile is fixed to the side of the mounting plate away from the frame assembly. A wire groove is fixed to the profile. A wire groove cover plate is covered on one side of the wire groove. A sliding table bracket is fixed to the wire groove. A sliding table adapter plate is detachably fixed on the sliding table bracket. A rubber pad is fixed between the sliding table adapter plate and the drag chain bracket. A loading sliding table and a loading drag chain bracket are fixed to the sliding table adapter plate. A loading silent drag chain is fixed to the loading drag chain bracket. A movable clamping member adapted to the loading silent drag chain is slidably connected to the loading sliding table. The movable clamping member is used to clamp and move the aluminum can. The feeding component is used to feed the aluminum can into the movable clamping member.

[0007] Preferably, the feeding component includes a loading mounting plate, a lifting cylinder group, and an adjusting plate II. The loading mounting plate is fixed to the lower end of the sliding table adapter plate. The adjusting plate II is fixedly installed on the loading mounting plate. The adjusting plate II is located below the movable clamping member. The lifting cylinder group is located between the loading mounting plate and the lifting cylinder group and is detachably fixed to the loading mounting plate.

[0008] Preferably, the digital printing head includes a head protective cover, a bottom plate nozzle group, a head lifting member, a head slide plate group, and a secondary ink cartridge group. The head slide plate group is slidably mounted on the main beam assembly. The head lifting member and the secondary ink cartridge group are fixed on the head slide plate group. The piston rod end of the head lifting member is fixed with the bottom plate nozzle group. The printing nozzles of the bottom plate nozzle group are communicated with the ink cartridges of the secondary ink cartridge group through pipelines. The head lifting member drives the nozzles of the bottom plate nozzle group to move in the vertical direction. The head protective cover covers the outside of the bottom plate nozzle group, the head lifting member, the head slide plate group, and the secondary ink cartridge group and is fixed to the head slide plate group by bolts. LED lamp groups are installed on both sides of the head protective cover. A travel switch bracket for installing a travel switch is fixed to the upper end of the bottom plate nozzle group.

[0009] Preferably, the frame assembly includes a main frame, a platform cover plate installed at the upper end of the main frame, and a support plate installed at the lower end of the main frame. Frame slide tables are fixed at positions on both sides of the platform cover plate at the upper end of the main frame. A frame silent drag chain is fixed on one side of the frame slide table. An adjusting plate one is detachably fixed between the frame slide table and the frame silent drag chain. A wire pressing hoop is fixed inside the frame silent drag chain. A transportation channel steel is installed inside the main frame and is fixed to the upper surface of the support plate. An electrician board is fixed on one side of the transportation channel steel. An air storage tank is fixed inside the main frame.

[0010] Preferably, the main beam assembly includes a main beam slide table, a main beam adapter plate, a slide table mounting frame, and a main beam drag chain group. The slide table mounting frame is slidably mounted on the main frame. The main beam adapter plate is fixed to the slide table mounting frame. The main beam slide table and the main beam drag chain group are both fixed to the main beam adapter plate. The main beam slide table is in sliding fit with the head slide plate group.

[0011] Preferably, the control box group includes a left box body and a right box body. The left box body and the right box body are respectively located on both sides of the main frame and are both fixed to the main frame. A controller and an alarm are installed on the right box body. The controller is used to control the operation of the main beam slide table, the bottom plate nozzle group, the head lifting member, the frame silent drag chain, the multi-station rotating table, the pressing member, the lifting cylinder group, the adjusting plate two, and the movable clamping member.

[0012] Preferably, a cleaning assembly is installed on the upper surface of the platform cover plate. The cleaning assembly is located below the digital printing head and on one side of the platform assembly. The cleaning assembly includes a bottom plate, side vertical plates, a waste ink cartridge, guide columns, a rear vertical plate, and a front vertical plate. The bottom plate is fixed to the upper surface of the platform cover plate. Two side vertical plates are provided and are respectively fixed to both sides of the bottom plate. The rear vertical plate is fixed to the rear side of the bottom plate. The front vertical plate is fixed to the front side of the bottom plate. The guide columns are respectively fixed to the bottom plate and the rear vertical plate at both ends. The waste ink cartridge is slidably connected to the guide columns. A stainless steel ball valve is fixed and communicated at the lower end of the waste ink cartridge.

[0013] Preferably, the platform component further includes a photoelectric sensor, which is fixed on the rotary fixture of the multi-station rotary table and electrically connected to the controller on the right box body.

[0014] A method for digital printing on a can body, which is applied to the above-mentioned can body digital printing device, and the method includes the following steps:

[0015] S1. Use the conveyor line to convey the aluminum can to the loading and unloading component. The commonly used conveyor line for aluminum can production in the prior art is used to convey the aluminum can to be printed below the loading and unloading component. At this time, the aluminum can is located between the movable clamping part and the lifting cylinder group.

[0016] S2. Send the aluminum can to the platform component through the loading and unloading component. After starting the lifting cylinder group, raise several aluminum cans conveyed by the conveyor line to the lower end of the movable clamping part. The movable clamping part starts and adsorbs and clamps the aluminum can, and then starts the feeding silent drag chain to drive the movable clamping part to slide to the upper end of the multi-station rotary table of the platform component.

[0017] S3. Clamp the aluminum can through the platform component, perform feeding detection on the aluminum can, and convey the aluminum can to the printing station. When the movable clamping part is located at the upper end of the rotary fixture of the multi-station rotary table, release the pressure, so that the aluminum can falls into the rotary fixture of the multi-station rotary table and is clamped by the rotary fixture of the multi-station rotary table. At this time, the feeding condition of the aluminum can can be detected through the photoelectric sensor to confirm the feeding condition of the aluminum can. Then start the turntable of the multi-station rotary table to drive the aluminum can to rotate to one end of the pressing part, and start the pressing part to further clamp and fix the aluminum can. At this time, the aluminum can is located on the printing station.

[0018] S4. Adjust the position of the printing nozzle so that the printing nozzle is located above the aluminum can. Start the main beam drag chain group to pull the head slide plate group to slide along the main beam slide table, so that the bottom plate nozzle group slides above the rotary fixture of the multi-station rotary table. Then start the head lifting part to drive the bottom plate nozzle group to descend or ascend to a suitable height.

[0019] S5. Perform digital printing operation on the aluminum can. At the same time, turn on the printing nozzles on the bottom plate nozzle group and the frame silent drag chain. The frame silent drag chain drives the main beam assembly and the digital printing head to move along the axial direction of the aluminum can, so that the printing nozzles on the bottom plate nozzle group move along the axial direction of the aluminum can. During this process, the printing ink in the secondary ink cartridge group is conveyed along the pipeline to the bottom plate nozzle group and is ejected by the bottom plate nozzle group to print on the aluminum can, completing the printing work of the aluminum can.

[0020] S6. Unload the printed aluminum cans. After printing is completed, first drive the pressure member to separate from the rotating fixture of the multi-station rotating table. Then start the turntable of the multi-station rotating table to make the printed aluminum cans return to the lower end of the movable clamping member. Adsorb and clamp the printed aluminum cans through the movable clamping member, and move them along the loading slide to the finished product conveyor line of the aluminum cans to complete the unloading operation of aluminum can printing.

[0021] The present invention provides a digital printing device and method for a can body through improvement. Compared with the prior art, it has the following improvements and advantages:

[0022] First: Through the setting of the multi-station rotating table and in cooperation with the digital printing head and the automatic loading and unloading mechanism, the present invention completes high-precision automated printing operations on the aluminum can body on a horizontal plane. Multiple aluminum cans can be printed simultaneously within the same time period, and loading or unloading operations can be carried out synchronously during printing, further shortening the printing time of aluminum cans and simultaneously improving the printing efficiency of aluminum cans and the production efficiency.

[0023] Second: Through the setting of the automatic loading and unloading mechanism, when loading the multi-station rotating table is required, the feeding component sends the aluminum cans to the lower part of the loading and unloading component. The movable clamping member starts and clamps the aluminum cans through negative pressure. Then the feeding component moves away. The movable clamping member drives the aluminum cans to slide along the loading slide to above the rotating fixture of the multi-station rotating table under the pulling of the loading drag chain support. Then the movable clamping member releases pressure, enabling the aluminum cans to fall into the rotating fixture to complete the loading work. When unloading is required, reverse the above operations to complete the unloading work.

[0024] Third: Through the setting of the frame component and the main beam component, after the frame silent drag chain starts, it can drive the digital printing head to move along the axial direction of the aluminum can by dragging the main beam component. When the main beam drag chain group starts, it can drag the head slide plate group to slide along the main beam slide, so that the bottom plate nozzle group slides along the main beam slide, facilitating the adjustment of the position of the bottom plate nozzle group, thereby well completing the aluminum can printing operation.

[0025] Fourth: Through the setting of the photoelectric sensor, when the photoelectric sensor senses photoelectrically, an energization signal is generated, indicating that there is no aluminum can on the clamping station. The photoelectric sensor transmits the photoelectric signal to the controller on the right box body and reminds the staff of non-loading through the alarm light to detect the loading status of the aluminum cans and avoid printing with empty materials, causing unnecessary losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following further explains the present invention in conjunction with the drawings and embodiments:

[0027] Figure 1 is a three-dimensional structural schematic diagram of the digital printing device for the can body of the present invention;

[0028] Figure 2 is the exploded view of the tank body digital printing device of the present invention;

[0029] Figure 3 is the exploded view of the main beam assembly of the present invention;

[0030] Figure 4 is the exploded view of the digital printing vehicle head of the present invention;

[0031] Figure 5 is the exploded view of the frame assembly of the present invention;

[0032] Figure 6 is the exploded view of the platform assembly of the present invention;

[0033] Figure 7 is the exploded view of the rotary clamping mechanism of the multi-station rotary table of the present invention;

[0034] Figure 8 is the exploded view of the control box group of the present invention;

[0035] Figure 9 is the exploded view of the cleaning assembly of the present invention;

[0036] Figure 10 is the exploded view of the feeding assembly of the present invention;

[0037] Figure 11 is the exploded view of the loading and unloading assembly of the present invention;

[0038] Figure 12 is the flow chart of the tank body digital printing method of the present invention.

[0039] Explanation of reference numerals:

[0040] 1. Main beam assembly; 101. Main beam slide; 102. Main beam adapter plate; 103. Slide mounting bracket; 104. Main beam drag chain group; 2. Digital printing headstock; 201. Headstock protective cover; 202. LED lamp group; 203. Travel switch bracket; 204. Bottom plate nozzle group; 205. Headstock lifting member; 206. Headstock slide group; 207. Secondary ink cartridge group; 3. Frame assembly; 301. Platform cover plate; 302. Main frame; 303. Frame slide; 304. Frame silent drag chain; 305. Wire pressing hoop; 306. Transport channel steel; 307. Support plate; 308. Electrician board; 309. Adjusting plate 1; 310. Air storage tank; 4. Platform assembly; 401. Multi-station rotating table; 4011. Motor; 4012. Reducer; 4013. Driving wheel; 4014. Driven wheel; 4015. Synchronous belt; 4016. Rotating fixture; 402. Photoelectric sensor; 403. Pressing member; 5. Control box group; 501. Left box body; 502. Right box body; 6. Cleaning assembly; 601. Bottom plate; 602. Side vertical plate; 603. Waste ink cartridge; 604. Guide post; 605. Rear vertical plate; 606. Front vertical plate; 607. Stainless steel ball valve; 7. Feeding assembly; 701. Feeding mounting plate; 702. Lifting cylinder group; 703. Adjusting plate 2; 8. Loading and unloading assembly; 801. Movable clamping member; 802. Loading slide; 803. Loading silent drag chain; 804. Loading drag chain bracket; 805. Rubber pad; 806. Slide adapter plate; 807. Slide bracket; 808. Profile; 809. Mounting plate; 810. Wire groove; 811. Wire groove cover plate. Detailed implementation mode

[0041] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] The present invention provides a digital printing device and method for a tank body by improvement. The technical solution of the present invention is as follows:

[0043] A digital printing device and method for a tank body mainly consists of two parts: a digital printing device for a tank body and a digital printing method for a tank body.

[0044] Such as Figure 1 、 Figure 6 And Figure 7As shown in the figure, a digital printing device for a can body includes a control box group 5 and a frame assembly 3 installed in the control box group 5. A platform assembly 4 is installed at the upper end of the frame assembly 3. A main beam assembly 1 slidably connected to the frame assembly 3 is erected on the upper end of the platform assembly 4. A digital printing head 2 is slidably connected to the main beam assembly 1. An automatic loading and unloading mechanism is installed at the rear side of the frame assembly 3. The automatic loading and unloading mechanism feeds the platform assembly 4. The control box group 5 is electrically connected to the main beam assembly 1, the digital printing head 2, the frame assembly 3, the platform assembly 4, and the automatic loading and unloading mechanism. The platform assembly 4 includes a multi-station rotating table 401 and a pressing member 403. The pressing member 403 is used to cooperate with the multi-station rotating table 401 to clamp the can body. The multi-station rotating table 401 includes a turntable, a flat plate, and a rotating clamping mechanism. The lower end of the turntable is detachably fixed to the frame assembly 3. The flat plate is erected on the turntable and fixed to the output shaft of the turntable. Multiple groups of rotating clamping mechanisms are provided and are circumferentially arranged in an array on the surface of the flat plate. In this embodiment, two groups of rotating clamping mechanisms are provided (as Figure 4 shown), and the number can also be set according to actual usage requirements. The rotating clamping mechanism includes a motor 4011, a reducer 4012, a driving wheel 4013, a driven wheel 4014, a synchronous belt 4015, and a rotating fixture 4016. The motor 4011 is fixed to the upper surface of the flat plate. The output shaft of the motor 4011 is fixed to the input shaft of the reducer 4012. The output shaft of the reducer 4012 is fixed to the driving wheel 4013. The synchronous belt 4015 is sleeved outside the driving wheel 4013 and the driven wheel 4014. Multiple driven wheels 4014 are provided and are symmetrically distributed with respect to the driving wheel 4013. Multiple rotating fixtures 4016 are provided and the number is equal to the sum of the number of driven wheels 4014 and the number of driving wheels 4013. The driving wheel 4013 and multiple driven wheels 4014 are respectively fixed to one end of multiple rotating fixtures 4016. When the digital printing head 2 is printing, the motor 4011 in the multi-station rotating table 401 starts synchronously. The motor 4011 drives the driving wheel 4013 to rotate through the reduction motor 4011. The driving wheel 4013 drives the driven wheel 4014 to rotate through the synchronous belt 4015. The driven wheel 4014 and the driving wheel 4013 drive the corresponding rotating fixtures 4016 to rotate at the same time, so that the can rotates, cooperating with the digital printing head 2 for printing. And when one of the rotating clamping mechanisms of the multi-station rotating table 401 is at the printing station, the other (or multiple) rotating clamping mechanisms are at the loading station or the unloading station or the inspection station, and operations such as loading, unloading, and inspection of the can can be carried out simultaneously. Through the setting of the multi-station rotating table 401, and in cooperation with the digital printing head 2 and the automatic loading and unloading mechanism, high-precision automated printing operations on the can body are completed on a horizontal plane, and multiple cans can be printed simultaneously within the same time period, and loading, unloading, or inspection operations can be carried out synchronously during printing, further shortening the printing time of the can and simultaneously improving the printing efficiency of the can and the production efficiency.

[0045] Furthermore, as shown in Figure 1 and Figure 11 shown, the automatic loading and unloading mechanism includes a feeding component 7 and a loading and unloading component 8. The loading and unloading component 8 includes a mounting plate 809 fixed to the rear side of the frame component 3. On the side of the mounting plate 809 away from the frame component 3, a profile 808 is fixed. A wire groove 810 is fixed on the profile 808. A wire groove cover plate 811 is covered on one side of the wire groove 810. A slide table bracket 807 is fixed on the wire groove 810. A slide table adapter plate 806 is detachably fixed on the slide table bracket 807. A rubber pad 805 is fixed between the slide table adapter plate 806 and the drag chain bracket 804. A loading slide table 802 and a loading drag chain bracket 804 are fixed on the slide table adapter plate 806. A loading silent drag chain 803 is fixed on the loading drag chain bracket 804. A movable clamping member 801 adapted to the loading silent drag chain 803 is slidably connected to the loading slide table 802. The movable clamping member 801 adopts a negative pressure clamping device with an arc-shaped groove adapted to the aluminum can. It can form a negative pressure in the clamping plate with the arc-shaped groove through suction, so that the aluminum can is not easy to fall off and is not easy to cause damage to the aluminum can. The movable clamping member 801 is used to clamp and move the aluminum can. The feeding component 7 is used to feed the aluminum can to the movable clamping member 801. When loading the multi-station rotary table 401, the feeding component 7 sends the aluminum can to the lower part of the loading and unloading component 8. The movable clamping member 801 starts and clamps the aluminum can through negative pressure. Then the feeding component 7 moves away. The movable clamping member 801 drives the aluminum can to slide along the loading slide table 802 to the upper part of the rotary fixture 4016 of the multi-station rotary table 401 under the pulling of the loading drag chain bracket 804. Then the movable clamping member 801 relieves the pressure, so that the aluminum can falls into the rotary fixture 4016 to complete the loading work. When unloading, reverse the above operations to complete the unloading work.

[0046] Furthermore, as shown in Figures 10 - 11 shown, the feeding component 7 includes a loading mounting plate 701, a lifting cylinder group 702 and an adjusting plate II 703. The loading mounting plate 701 is fixed to the lower end of the slide table adapter plate 806. The adjusting plate II 703 is fixedly installed on the loading mounting plate 701. The adjusting plate II 703 is located below the movable clamping member 801. The lifting cylinder group 702 is located between the loading mounting plate 701 and the lifting cylinder group 702 and is detachably fixed to the loading mounting plate 701. A plate body for supporting the aluminum can is installed at the top of the lifting cylinder group 702. When the lifting cylinder group 702 rises, the aluminum can is lifted to the lower part of the movable clamping member 801, so as to facilitate the movable clamping member 801 to adsorb the aluminum can. And the number of aluminum cans loaded at one time by the lifting cylinder group 702 is matched with the number of aluminum cans that can be clamped by the movable clamping member 801 at one time, and the loading work of multiple aluminum cans at one time can be completed.

[0047] Furthermore, as shown in Figure 1And Figure 4 As shown in the figure, the digital printing head 2 includes a head protective cover 201, a bottom plate nozzle group 204, a head lifting member 205, a head slide plate group 206, and a secondary ink cartridge group 207. The head slide plate group 206 is slidably mounted on the main beam assembly 1. The head lifting member 205 and the secondary ink cartridge group 207 are fixed on the head slide plate group 206. The piston rod end of the head lifting member 205 is fixed with the bottom plate nozzle group 204. The bottom plate nozzle group 204 is composed of a bottom plate, a frame, and digital printing nozzles. A plurality of digital printing nozzles are provided and evenly distributed on the bottom plate. The digital printing nozzles adopt the commonly used and suitable aluminum can printing nozzles in the prior art for this embodiment. The printing nozzles of the bottom plate nozzle group 204 are communicated with the ink cartridges of the secondary ink cartridge group 207 through pipelines. The head lifting member 205 drives the nozzles of the bottom plate nozzle group 204 to move in the vertical direction. The head protective cover 201 covers the outside of the bottom plate nozzle group 204, the head lifting member 205, the head slide plate group 206, and the secondary ink cartridge group 207 and is fixed to the head slide plate group 206 by bolts. LED lamp groups 202 are installed on both sides of the head protective cover 201. A travel switch bracket 203 for installing a travel switch is fixed to the upper end of the bottom plate nozzle group 204. During the aluminum can printing, the bottom plate nozzle group 204 moves along the axial direction of the aluminum can, thereby completing the printing operation of the aluminum can.

[0048] Further, as Figure 5 shown, the frame assembly 3 includes a main frame 302, a platform cover plate 301 installed at the upper end of the main frame 302, and a support plate 307 installed at the lower end of the main frame 302. Frame slide tables 303 are fixed at positions on both sides of the platform cover plate 301 at the upper end of the main frame 302. A frame silent drag chain 304 is fixed to one side of the frame slide table 303. An adjusting plate 309 is detachably fixed between the frame slide table 303 and the frame silent drag chain 304. A wire pressing hoop 305 is fixed inside the frame silent drag chain 304. A transportation channel steel 306 is installed inside the main frame 302. The transportation channel steel 306 is fixed to the upper surface of the support plate 307. An electrician's board 308 is fixed to one side of the transportation channel steel 306. An air storage tank 310 is fixed inside the main frame 302. After the frame silent drag chain 304 starts, it can drive the digital printing head 2 to move along the axial direction of the aluminum can by dragging the main beam assembly 1, thereby well completing the printing operation of the aluminum can.

[0049] Further, as Figures 1 - 4As shown in the figure, the main beam assembly 1 includes a main beam slide 101, a main beam adapter plate 102, a slide mounting bracket 103, and a main beam drag chain group 104. The slide mounting bracket 103 is slidably mounted on the main frame 302. The main beam adapter plate 102 is fixed to the slide mounting bracket 103. Both the main beam slide 101 and the main beam drag chain group 104 are fixed to the main beam adapter plate 102. The main beam slide 101 is slidably engaged with the headstock slide plate group 206. When the main beam drag chain group 104 is activated, it can drag the headstock slide plate group 206 to slide along the main beam slide 101, so that the bottom plate nozzle group 204 slides along the main beam slide 101, facilitating the adjustment of the position of the bottom plate nozzle group 204.

[0050] Further, as Figures 1 - 8 , Figure 10 and Figure 11 shown, the control box group 5 includes a left box body 501 and a right box body 502. The left box body 501 and the right box body 502 are respectively located on both sides of the main frame 302 and are both fixed to the main frame 302. A controller and an alarm are installed on the right box body 502. The controller uses a programmable industrial control computer commonly used in the prior art and applicable to this embodiment. The controller is used to control the operation of the main beam slide 101, the bottom plate nozzle group 204, the headstock lifting member 205, the frame silent drag chain 304, the multi-station rotating table 401, the pressing member 403, the lifting cylinder group 702, the adjusting plate two 703, and the movable clamping member 801. The alarm is used to give an alarm when printing is abnormal.

[0051] Further, as Figure 1 and Figure 9The upper surface of the platform cover 301 is provided with a cleaning component 6, which is located below the digital printing head 2 and on one side of the platform component 4. The cleaning component 6 includes a bottom plate 601, a side plate 602, a waste ink cartridge 603, a guide column 604, a rear plate 605 and a front plate 606. The bottom plate 601 is fixed to the upper surface of the platform cover 301, two side plates 602 are provided and are respectively fixed to both sides of the bottom plate 601, the rear plate 605 is fixed to the rear side of the bottom plate 601, the front plate 606 is fixed to the front side of the bottom plate 601, the two ends of the guide column 604 are respectively fixed to the bottom plate 601 and the rear plate 605, the waste ink cartridge 603 is slidably connected to the guide column 604, the lower end of the waste ink cartridge 603 is fixed and connected to a stainless steel ball valve 607, when the bottom plate After the print nozzles of the nozzle group 204 have been used for a period of time, it is usually necessary to clean the print nozzles of the bottom plate nozzle group 204. At this time, the staff only needs to start the main beam drag chain group 104, so that the main beam drag chain group 104 drags the front skateboard group 206 to slide along the main beam slide 101, so that the bottom plate nozzle group 204 slides along the main beam slide 101 to above the waste ink box 603, and the staff can flush the bottom plate nozzle group 204, and the waste liquid after flushing falls into the waste ink box 603 for collection, so as to facilitate flushing of the bottom plate nozzle group 204 when cleaning is needed, and collect the waste ink generated by flushing, so as to avoid the waste ink from spreading on the printing device and causing pollution, and the waste ink box 603 is directly installed in the printing device and is not easy to be lost.

[0052] Further, such as Figure 1 and Figure 11 The platform assembly 4 shown also includes a photoelectric sensor 402, which is fixed on the rotating fixture 4016 of the multi-station rotating table 401. The photoelectric sensor 402 is electrically connected to the controller on the right box 502. Through the setting of the photoelectric sensor 402, when the photoelectric sensor 402 is photoelectrically sensing, a power-on signal is generated, indicating that there are no cans on the clamping station. The photoelectric sensor 402 will transmit the photoelectric signal to the controller on the right box 502, and remind the staff through the alarm light that no cans have been loaded, thereby detecting the loading status of the cans and avoiding printing of empty materials to cause unnecessary losses.

[0053] like Figure 12 As shown, a can body digital printing method is applied to the above-mentioned can body digital printing device, and the method comprises the following steps:

[0054] S1, using a conveyor line to convey the cans to the loading and unloading assembly 8, using a can production conveyor line commonly used in the prior art to convey the cans to be printed to the bottom of the loading and unloading assembly 8, at which time the cans are located between the movable clamping member 801 and the lifting cylinder group 702;

[0055] S2. Use the loading and unloading component 8 to send the aluminum cans to the platform component 4. After starting the lifting cylinder group 702, raise several aluminum cans conveyed by the conveyor line to the lower end of the movable clamping part 801. Start the movable clamping part 801 to adsorb and clamp the aluminum cans, and then start the feeding silent drag chain 803 to drive the movable clamping part 801 to slide to the upper end of the multi-station rotary table 401 of the platform component 4;

[0056] S3. Clamp the aluminum cans through the platform component 4, conduct feeding detection of the aluminum cans, and convey the aluminum cans to the printing station. When the movable clamping part 801 is located above the rotary fixture 4016 of the multi-station rotary table 401, relieve the pressure so that the aluminum cans fall into the rotary fixture 4016 of the multi-station rotary table 401 and are clamped by the rotary fixture 4016 of the multi-station rotary table 401. At this time, the feeding condition of the aluminum cans can be detected through the photoelectric sensor 402 to confirm the feeding condition of the aluminum cans. Then start the turntable of the multi-station rotary table 401 to drive the aluminum cans to rotate to one end of the pressure piece 403, and start the pressure piece 403 to further clamp and fix the aluminum cans. At this time, the aluminum cans are located at the printing station;

[0057] S4. Adjust the position of the printing nozzle so that the printing nozzle is located above the aluminum can. Start the main beam drag chain group 104 to pull the head slide plate group 206 to slide along the main beam slide 101, so that the bottom plate nozzle group 204 slides above the rotary fixture 4016 of the multi-station rotary table 401. Then start the head lifting part 205 to make the head lifting part 205 drive the bottom plate nozzle group 204 to descend or ascend to an appropriate height;

[0058] S5. Conduct aluminum can printing operations. At the same time, turn on the printing nozzles on the bottom plate nozzle group 204 and the frame silent drag chain 304. The frame silent drag chain 304 drives the main beam assembly 1 and the digital printing head 2 to move along the axial direction of the aluminum can, so that the printing nozzles on the bottom plate nozzle group 204 move along the axial direction of the aluminum can. During this process, the printing ink in the secondary ink cartridge group 207 is conveyed along the pipeline to the bottom plate nozzle group 204 and is sprayed by the bottom plate nozzle group 204 and printed on the aluminum can to complete the printing work of the aluminum can;

[0059] S6. Unload the printed aluminum cans. After printing is completed, first drive the pressure piece 403 to separate from the rotary fixture 4016 of the multi-station rotary table 401. Then start the turntable of the multi-station rotary table 401 to make the printed aluminum cans return to the lower end of the movable clamping part 801. Adsorb and clamp the printed aluminum cans through the movable clamping part 801, and move along the feeding slide 802 to the finished product conveyor line of the aluminum cans to complete the unloading operation of aluminum can printing.

[0060] Working principle: When in use, a conveyor line for transporting aluminum cans needs to be arranged at the rear side of the answering device. The aluminum cans to be printed are transported to the lower part of the loading and unloading assembly 8 by using a common aluminum can production conveyor line in the prior art. At this time, the aluminum can is located between the movable clamping member 801 and the lifting cylinder group 702. After starting the lifting cylinder group 702, several aluminum cans transported by the conveyor line are lifted to the lower end of the movable clamping member 801. The movable clamping member 801 is started to adsorb and clamp the aluminum can. Then, the feeding silent drag chain 803 is started to drive the movable clamping member 801 to slide to the upper end of the multi-station rotating table 401 of the platform assembly 4. When the movable clamping member 801 is located above the rotating fixture 4016 of the multi-station rotating table 401, the pressure is released, so that the aluminum can falls into the rotating fixture 4016 of the multi-station rotating table 401 and is clamped by the rotating fixture 4016 of the multi-station rotating table 401. At this time, the feeding condition of the aluminum can can be detected through the photoelectric sensor 402 to confirm the feeding condition of the aluminum can. Then, the turntable of the multi-station rotating table 401 is started to drive the aluminum can to rotate to one end of the pressing member 403, and the pressing member 403 is started to further clamp and fix the aluminum can. At this time, the aluminum can is located at the printing station. The main beam drag chain group 104 is started to pull the head slide group 206 to slide along the main beam slide 101, so that the bottom plate nozzle group 204 slides above the rotating fixture 4016 of the multi-station rotating table 401. Then, the head lifting member 205 is started, so that the head lifting member 205 drives the bottom plate nozzle group 204 to descend or ascend to a suitable height. At the same time, the printing nozzles on the bottom plate nozzle group 204 and the frame silent drag chain 304 are opened. The frame silent drag chain 304 drives the main beam assembly 1 and the digital printing head 2 to move along the axial direction of the aluminum can, so that the printing nozzles on the bottom plate nozzle group 204 move along the axial direction of the aluminum can. During this process, the printing ink in the secondary ink cartridge group 207 is transported along the pipeline to the bottom plate nozzle group 204 and is ejected by the bottom plate nozzle group 204 to be printed on the aluminum can, completing the printing work of the aluminum can. After the printing is completed, first drive the pressing member 403 to separate from the rotating fixture 4016 of the multi-station rotating table 401. Then, start the turntable of the multi-station rotating table 401 to make the printed aluminum can return to the lower end of the movable clamping member 801. The printed aluminum can is adsorbed and clamped by the movable clamping member 801 and is moved along the feeding slide 802 to the finished product conveyor line of the aluminum can, completing the unloading operation of the aluminum can printing.

[0061] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A digital printing device for a tank body, comprising a control box group (5) and a frame assembly (3) installed in the control box group (5). It is characterized in that: A platform assembly (4) is installed at the upper end of the frame assembly (3). A main beam assembly (1) slidably connected to the frame assembly (3) is erected on the upper end of the platform assembly (4). A digital printing head (2) is slidably connected to the main beam assembly (1). An automatic loading and unloading mechanism is installed at the rear side of the frame assembly (3). The automatic loading and unloading mechanism supplies materials to the platform assembly (4). The control box group (5) is electrically connected to the main beam assembly (1), the digital printing head (2), the frame assembly (3), the platform assembly (4) and the automatic loading and unloading mechanism. The platform assembly (4) includes a multi-station rotating table (401) and a pressing member (403). The pressing member (403) is used to cooperate with the multi-station rotating table (401) to clamp the aluminum can body. The multi-station rotating table (401) includes a turntable, a flat plate and a rotating clamping mechanism. The lower end of the turntable is detachably fixed to the frame assembly (3). The flat plate is erected on the turntable and fixed to the output shaft of the turntable. Multiple groups of the rotating clamping mechanisms are provided and are circumferentially and arrayedly distributed along the surface of the flat plate. The rotating clamping mechanism includes a motor (4011), a speed reducer (4012), a driving wheel (4013), a driven wheel (4014), a synchronous belt (4015) and a rotating fixture (4016). The motor (4011) is fixed to the upper surface of the flat plate. The output shaft of the motor (4011) is fixed to the input shaft of the speed reducer (4012). The output shaft of the speed reducer (4012) is fixed to the driving wheel (4013). The synchronous belt (4015) is sleeved outside the driving wheel (4013) and the driven wheel (4014). Multiple driven wheels (4014) are provided and are symmetrically distributed with respect to the driving wheel (4013). Multiple rotating fixtures (4016) are provided, and the number thereof is equal to the sum of the numbers of the driven wheels (4014) and the driving wheel (4013). The driving wheel (4013) and multiple driven wheels (4014) are respectively fixed to one end of multiple rotating fixtures (4016). The automatic loading and unloading mechanism includes a feeding component (7) and a loading and unloading component (8). The loading and unloading component (8) includes a mounting plate (809) fixed to the rear side of the frame component (3). On the side of the mounting plate (809) away from the frame component (3), a profile (808) is fixed. A wire groove (810) is fixed on the profile (808). A wire groove cover plate (811) is covered on one side of the wire groove (810). A slide table bracket (807) is fixed on the wire groove (810). A slide table adapter plate (806) is detachably fixed on the slide table bracket (807). A rubber pad (805) is fixed between the slide table adapter plate (806) and the drag chain bracket (804). A loading slide table (802) and a loading drag chain bracket (804) are fixed on the slide table adapter plate (806). A loading silent drag chain (803) is fixed on the loading drag chain bracket (804). An active clamping member (801) adapted to the loading silent drag chain (803) is slidably connected to the loading slide table (802). The active clamping member (801) is used for clamping and moving the aluminum can. The feeding component (7) is used for feeding the aluminum can into the active clamping member (801).

2. A digital printing device for a can body according to claim 1, characterized in that: The feeding component (7) includes a loading mounting plate (701), a lifting cylinder group (702) and an adjusting plate II (703). The loading mounting plate (701) is fixed to the lower end of the slide table adapter plate (806). The adjusting plate II (703) is fixedly installed on the loading mounting plate (701). The adjusting plate II (703) is located below the active clamping member (801). The lifting cylinder group (702) is located between the loading mounting plate (701) and the lifting cylinder group (702) and is detachably fixed to the loading mounting plate (701).

3. A digital printing device for a can body according to claim 2, characterized in that: The digital printing head (2) includes a head protective cover (201), a bottom plate nozzle group (204), a head lifting member (205), a head slide plate group (206), and a secondary ink cartridge group (207). The head slide plate group (206) is slidably mounted on the main beam assembly (1). The head lifting member (205) and the secondary ink cartridge group (207) are fixed on the head slide plate group (206). The piston rod end of the head lifting member (205) is fixed with the bottom plate nozzle group (204). The printing nozzles of the bottom plate nozzle group (204) are communicated with the ink cartridges of the secondary ink cartridge group (207) through pipelines. The head lifting member (205) drives the nozzles of the bottom plate nozzle group (204) to move in the vertical direction. The head protective cover (201) covers the outside of the bottom plate nozzle group (204), the head lifting member (205), the head slide plate group (206), and the secondary ink cartridge group (207) and is fixed to the head slide plate group (206) by bolts. LED lamp groups (202) are installed on both sides of the head protective cover (201). A travel switch bracket (203) for installing a travel switch is fixed to the upper end of the bottom plate nozzle group (204).

4. A tank body digital printing device according to claim 3, characterized in that: The frame assembly (3) includes a main frame (302), a platform cover plate (301) installed at the upper end of the main frame (302), and a support plate (307) installed at the lower end of the main frame (302). Frame slide tables (303) are fixed at positions on both sides of the platform cover plate (301) at the upper end of the main frame (302). A frame silent drag chain (304) is fixed on one side of the frame slide table (303). An adjusting plate one (309) is detachably fixed between the frame slide table (303) and the frame silent drag chain (304). A wire pressing hoop (305) is fixed inside the frame silent drag chain (304). A transportation channel steel (306) is installed inside the main frame (302). The transportation channel steel (306) is fixed to the upper surface of the support plate (307). An electrician board (308) is fixed on one side of the transportation channel steel (306). An air storage tank (310) is fixed inside the main frame (302).

5. A tank body digital printing device according to claim 4, characterized in that: The main beam assembly (1) includes a main beam slide table (101), a main beam adapter plate (102), a slide table mounting frame (103), and a main beam drag chain group (104). The slide table mounting frame (103) is slidably mounted on the main frame (302). The main beam adapter plate (102) is fixed to the slide table mounting frame (103). The main beam slide table (101) and the main beam drag chain group (104) are both fixed to the main beam adapter plate (102). The main beam slide table (101) is in sliding fit with the head slide plate group (206).

6. A tank body digital printing device according to claim 5, characterized in that: The control box group (5) comprises a left box body (501) and a right box body (502), wherein the left box body (501) and the right box body (502) are respectively located on both sides of the main frame (302) and are both fixed to the main frame (302), and a controller and an alarm are installed on the right box body (502), and the controller is used to control the operation of the main beam slide (101), the bottom plate nozzle group (204), the front lifting member (205), the frame silent drag chain (304), the multi-station rotary table (401), the pressing member (403), the lifting cylinder group (702), the adjustment plate 2 (703) and the movable clamping member (801).

7. A can body digital printing device according to claim 4, Features: A cleaning component (6) is installed on the upper surface of the platform cover plate (301). The cleaning component (6) is located below the digital printing head (2) and on one side of the platform component (4). The cleaning component (6) comprises a bottom plate (601), a side plate (602), a waste ink cartridge (603), a guide column (604), a rear plate (605) and a front plate (606). The bottom plate (601) is fixed to the upper surface of the platform cover plate (301). The side plate (602) is fixed to the upper surface of the platform cover plate (301). 02) are provided with two and are respectively fixed to the two sides of the bottom plate (601), the rear vertical plate (605) is fixed to the rear side of the bottom plate (601), the front vertical plate (606) is fixed to the front side of the bottom plate (601), the two ends of the guide column (604) are respectively fixed to the bottom plate (601) and the rear vertical plate (605), the waste ink box (603) is slidably connected to the guide column (604), and the lower end of the waste ink box (603) is fixed and connected to a stainless steel ball valve (607).

8. A can body digital printing device according to claim 1, Features: The platform assembly (4) further comprises a photoelectric sensor (402), wherein the photoelectric sensor (402) is fixed on a rotating fixture (4016) of the multi-station rotating platform (401), and the photoelectric sensor (402) is electrically connected to a controller on the right box (502).

9. A can body digital printing method, applied to a can body digital printing device as claimed in any one of claims 5 to 8, It is characterized in that The method comprises the following steps: S1, using a conveyor line to convey the cans to the loading and unloading assembly (8), the can production conveyor line conveys the cans to be printed to the bottom of the loading and unloading assembly (8), at which time the cans are located between the movable clamping member (801) and the lifting cylinder group (702); S2, the cans are delivered to the platform assembly (4) through the loading and unloading assembly (8), and the lifting cylinder assembly (702) is started to lift the several cans transported by the conveyor line to the lower end of the movable clamping member (801), and the movable clamping member (801) is started to absorb and clamp the cans, and then the loading silent drag chain (803) is started to drive the movable clamping member (801) to slide to the upper end of the multi-station rotary table (401) of the platform assembly (4); S3. Clamp the aluminum can through the platform component (4), conduct feeding detection of the aluminum can, and convey the aluminum can to the printing station. When the movable clamping member (801) is located at the upper end of the rotary fixture (4016) of the multi-station rotary table (401), pressure is relieved, so that the aluminum can falls into the rotary fixture (4016) of the multi-station rotary table (401) and is clamped by the rotary fixture (4016) of the multi-station rotary table (401). At this time, the feeding condition of the aluminum can can be detected through the photoelectric sensor (402) to confirm the feeding condition of the aluminum can. Then, start the turntable of the multi-station rotary table (401) to drive the aluminum can to rotate to one end of the pressure member (403), and start the pressure member (403) to further clamp and fix the aluminum can. At this time, the aluminum can is located on the printing station; S4. Adjust the position of the printing nozzle so that the printing nozzle is located above the aluminum can. Start the main beam drag chain group (104) to pull the head slide plate group (206) to slide along the main beam slide (101), so that the bottom plate nozzle group (204) slides above the rotary fixture (4016) of the multi-station rotary table (401). Then, start the head lifting member (205) to make the head lifting member (205) drive the bottom plate nozzle group (204) to descend or ascend to an appropriate height; S5. Conduct aluminum can printing operations. At the same time, turn on the printing nozzles on the bottom plate nozzle group (204) and the frame silent drag chain (304). The frame silent drag chain (304) drives the main beam assembly (1) and the digital printing head (2) to move along the axial direction of the aluminum can, so that the printing nozzles on the bottom plate nozzle group (204) move along the axial direction of the aluminum can. During this process, the printing ink in the secondary ink cartridge group (207) is transported along the pipeline to the bottom plate nozzle group (204) and is ejected by the bottom plate nozzle group (204) to be printed on the aluminum can, completing the printing work of the aluminum can; S6. Unload the printed aluminum can. After printing is completed, first drive the pressure member (403) to separate from the rotary fixture (4016) of the multi-station rotary table (401). Then, start the turntable of the multi-station rotary table (401) to make the printed aluminum can return to the lower end of the movable clamping member (801). Adsorb and clamp the printed aluminum can through the movable clamping member (801) and move it along the feeding slide (802) to the finished product conveyor line of the aluminum can, completing the unloading operation of aluminum can printing.

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