Automatic printing system for steel drum

Abstract

The utility model relates to the field of steel drum printing, and discloses an automatic steel drum printing system which comprises a conveying frame, an opening searching positioning assembly, a printing assembly and an overturning assembly, a lifting workbench is arranged in the conveying frame, the conveying frame is provided with a mounting frame, and the printing assembly is arranged at one end of the mounting frame. The printing assembly comprises a guide rail, a printing frame, a first driving piece and two sets of printing pieces, the guide rail is arranged at one end of the mounting frame, the printing frame is arranged in the mounting frame, the printing frame is provided with a first printing area and a second printing area, the two sets of printing pieces are arranged at one end of the guide rail, and each printing piece comprises a sliding block, a second driving piece, a connecting block, an air cylinder and a scraping plate; the second driving piece is arranged between the sliding block and the guide rail, the connecting block is arranged at one end of the sliding block, the air cylinder is arranged at one end of the connecting block, and the scraper is arranged at the output end of the air cylinder. The copywriting of the first printing area and the copywriting of the second printing area are printed on the same axial direction of the steel drum through the two sets of printing pieces, the printing procedures of the steel drum are reduced, and the printing efficiency of the steel drum is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel drum printing technical field, concretely relates to steel drum automatic printing system. BACKGROUND

[0002] Steel drum is widely used in the transportation and storage of liquid, solid and semi-solid products as a kind of efficient packaging container. The existing steel drum is usually provided with a large mouth and a small mouth, the large mouth is mainly used for quickly loading and unloading materials, cleaning and maintenance, and is the main operating port of the steel drum, and the small mouth is mainly used for auxiliary exhaust, controlling material flow rate or installing accessories, and is the auxiliary function port of the steel drum. Before use, the outer wall of the steel drum often needs to be printed with label information to identify the content.

[0003] The prior art discloses (publication number: CN100577420C) steel drum multi-color automatic screen printing machine, and the technical points are that the conveying devices are respectively fixed at the front and rear ends of the printing machine frame, the printing mechanism is located directly above the frame, the positioning gear device is fixed directly behind the frame, the lifting workbench is fixed below the frame, and the drying device is located directly above the rear conveying frame. By adopting such a structure, the steel drum is sent to the printing position by the front conveying frame, the lifting workbench lifts the steel drum, the positioning cylinder finds the oil filler port, fastens the barrel body on the large gear, and then drives the same cylinder to complete the printing process of the screen movement and barrel body rotation synchronization, so that the precision of multi-color overprinting is ensured. The advantages of the present application are good overprinting precision, stable color, fast production speed, and can be put into industrial production.

[0004] However, the prior art can only print multiple colors in different axial directions of the same steel drum, and cannot print different colors or different texts in the same axial direction of the steel drum, resulting in the need for secondary printing to realize printing of different colors or different texts in the same axial direction, which greatly reduces the efficiency of steel drum printing. Therefore, we propose a double-color common screen printing method to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model intends to provide steel drum automatic printing system to solve the prior art can only print multiple colors in different axial directions of the same steel drum, resulting in the need for secondary printing to realize printing of different colors or different texts in the same axial direction, which greatly reduces the efficiency of steel drum printing.

[0006] To achieve the above object, the utility model discloses the following technical scheme: steel drum automatic printing system, including conveying frame, be equipped with lifting workbench in conveying frame still including seek mouth positioning assembly, printing assembly and two group of turnover components, turnover component is located at both ends of conveying frame, and turnover component is used for changing the transport attitude of steel drum, and seek mouth positioning assembly is located between conveying frame, and seek mouth positioning assembly is used for identifying the big mouth of steel drum, and conveying frame one end is equipped with mounting bracket, and printing assembly is located at one end of mounting bracket, and printing assembly includes guide rail, printing frame, first drive part and two group of printing parts, and guide rail is located at one end of mounting bracket away from conveying frame, and printing frame is located in mounting bracket, and the first printing area and the second printing area are opened in printing frame, and first drive part is located between mounting bracket and printing frame, and first drive part can drive printing frame to remove, and two group of printing parts are symmetrically located at one end of guide rail away from conveying frame, and printing part includes slider, second drive part, connecting block, pneumatic cylinder and squeege, and slider is located at one end of guide rail away from mounting bracket, and second drive part is located between slider and guide rail, and second drive part can make slider move on guide rail, and connecting block is located at one end of slider close to conveying frame, and pneumatic cylinder is located at one end of connecting block, and squeege is located at the output of pneumatic cylinder, and every squeege can be with corresponding first printing area and second printing area and abuts.

[0007] The beneficial effects of the scheme are that the turnover assembly at the input end of the conveying frame is used to change the steel drum from a vertical state to a lying state, thereby facilitating the subsequent printing, the turnover assembly at the output end of the conveying frame is used to change the steel drum from a lying state to a vertical state, preventing the printed text on the outer wall of the steel drum from being scratched, the steel drum is adjusted to the same printing position by the mouth searching positioning assembly, preventing the text positions of the steel drums from being different during subsequent printing, affecting the appearance of the steel drums, the first printing area and the second printing area are formed in the printing frame, so that different texts or colors can be arranged in the first printing area and the second printing area, and the printing frame moves under the action of the printing piece arranged correspondingly, so that the complete text is printed on the outer wall of the steel drum, the mounting frame is used to mount the printing assembly, and the lifting workbench is used to lift the steel drum to be printed, so that the steel drum to be printed is in abutment with the lower end of the printing frame, the first driving piece is used to drive the printing frame to move reciprocally, and when the printing frame moves, the steel drum in abutment with the printing frame can be driven to rotate, so as to cooperate with the stationary printing piece to scrape the pigment in the printing frame, so that the text in the printing frame is uniformly printed on the outer wall of the steel drum, after the first group of printing pieces prints the text in the first printing area to the outer wall of the steel drum, the first group of printing pieces is separated from the first printing area and moves together with the printing frame, thereby leaving the printing station, when the second group of printing pieces moves to the printing station, the second group of printing pieces stops moving and abuts against the second printing area, thereby printing the text in the second printing area to the outer wall of the steel drum, and when the second group of printing pieces finishes printing the text in the second printing area, the second group of printing pieces is separated from the second printing area, thereby completing the printing of two different texts or colors on the same axial direction of the steel drum, and simplifying the steps of printing the steel drum.

[0008] Preferably, as an improvement, the turnover assembly comprises a turnover frame, a rotating shaft, a turnover block, and a plurality of short rotating shafts and long rotating shafts, the rotating shaft is arranged in the inner wall of one end of the turnover frame close to the conveying frame, the turnover block is arranged on the outer wall of the rotating shaft, the outer wall of the turnover block is uniformly provided with four groups of supporting pieces, each group of supporting pieces comprises two supporting rods, the two supporting rods are symmetrically arranged on the outer wall of the turnover block, the plurality of short rotating shafts are symmetrically arranged on the inner wall of the turnover frame, and the short rotating shafts are located on both sides of the supporting rods, and the plurality of long rotating shafts are arranged on the inner wall of the turnover frame, and the long rotating shafts are located away from the conveying frame.

[0009] The beneficial effect is that: in order to prevent the steel drum from rolling during the loading and unloading process, the steel drum is usually placed vertically, so as to avoid the rolling of the steel drum during transportation, and when printing the steel drum, the steel drum needs to be placed horizontally on the conveying frame, so as to facilitate the subsequent printing on the outer wall of the steel drum, and after the printing of the steel drum is completed, in order to prevent the steel drum from lying down and wearing the printed text on the outer wall, the operator needs to turn the steel drum to the vertical state, and in the scheme, the turnover assembly is arranged at both ends of the conveying frame, so that the steel drum in the vertical state can be turned to the horizontal state, and then the conveying frame can transport the steel drum to the printing assembly below for printing, and after the horizontal steel drum is printed, the conveying frame transports the steel drum to the upper end of the turnover assembly, so as to turn the horizontal steel drum to the vertical state, prevent the printed text on the outer wall of the steel drum from being scratched, and facilitate subsequent handling.

[0010] Preferably, as an improvement, it further comprises a pushing assembly, the pushing assembly comprising a stand, a pushing cylinder and a pushing rod, the stand being arranged on one side of the input end of the conveying frame, the pushing cylinder being arranged on the upper end of the stand, and the pushing rod being arranged on the output end of the pushing cylinder and being capable of contacting the steel drum on the upper end of the supporting rod.

[0011] The beneficial effect is that: the pushing assembly is used to push the steel drum on the upper end of the supporting rod to the upper end of the conveying frame for transportation, thereby reducing the labor intensity of the workers, the stand is used to install the pushing cylinder, and the pushing cylinder cooperates with the pushing rod to push the steel drum away from the upper end of the supporting rod, so that the steel drum rolls to the upper end of the conveying frame.

[0012] Preferably, as an improvement, the homing positioning assembly comprises a lifting table, a rotating rod, a driving motor and a sensor, the lifting table being arranged in the conveying frame, the driving motor being arranged at one end of the conveying frame, the rotating rod being arranged at the output end of the driving motor, the other end of the rotating rod being rotatably connected to the conveying frame, the outer wall of the rotating rod being symmetrically provided with a pressing wheel capable of abutting against the outer wall of the steel drum, and the sensor being arranged at one end of the conveying frame close to the opening of the steel drum and being capable of identifying the large opening of the steel drum.

[0013] The beneficial effect is that: the lifting table is used to lift the steel drum, so that the steel drum abuts against the pressing wheel on the outer wall of the rotating rod, the driving motor is used to drive the rotating rod to rotate, so as to drive the symmetrically arranged pressing wheels on the outer wall of the rotating rod to rotate, thereby driving the steel drum to rotate, when the large opening of the steel drum rotates to the front end of the sensor, the sensor identifies the large opening and transmits an electric signal to the driving motor, so as to control the driving motor to stop rotating, thereby adjusting the large opening of the steel drum to a uniform position, facilitating the subsequent printing and improving the printing effect of the steel drum.

[0014] Preferably, as an improvement, the first driving member comprises a first motor, a first gear and a first rack, the first motor being arranged at one end of the mounting frame, the first gear being arranged at the output end of the first motor, and the first rack being arranged at one end of the printing frame close to the guide rail and being engaged with the first gear.

[0015] The beneficial effect is that the first rack is arranged at the end of the printing frame close to the mounting frame, and the first gear is arranged at the output end of the first motor, so that the movement of the printing frame is driven by starting the motor.

[0016] Preferably, as an improvement, the second driving member comprises a second motor, a second gear and a second rack, the second motor is arranged at the end of the sliding block away from the guide rail, the output end of the second motor penetrates the sliding block, the second gear is arranged at the output end of the second motor, and the second rack is arranged on the inner wall of the guide rail, and the second gear is engaged with the second rack.

[0017] The beneficial effect is that the second motor is started to drive the second gear to rotate, so that the second gear moves along the second rack engaged therewith, and the sliding block moves along the outer wall of the guide rail.

[0018] Preferably, as an improvement, the end of the printing frame close to the conveying frame is symmetrically provided with a pressing strip, the pressing strip can abut against the edge of the steel drum, and a plurality of springs are arranged between the pressing strip and the printing frame.

[0019] The beneficial effect is that the pressing strip is arranged at the lower end of the printing frame, so as to increase the friction between the printing frame and the steel drum, prevent the steel drum from slipping to cause misprinting, and the plurality of springs arranged between the pressing strip and the printing frame can not only reduce the impact force generated by the abutment of the steel drum and the pressing strip on the printing frame, but also promote the pressing strip to contact the edge of the steel drum more closely, thereby further preventing the steel drum from slipping.

[0020] Preferably, as an improvement, the sliding block is provided in a U shape, the opening of the sliding block faces the end close to the printing frame, and the side wall of the sliding block is symmetrically provided with a through groove.

[0021] The beneficial effect is that the sliding block is provided in a U shape, so that the sliding block is wrapped around the outer wall of the guide rail, thereby increasing the stability of the sliding block during movement, and the through groove provided in the side wall of the sliding block can reduce the weight of the sliding block and reduce the wear between the second gear and the second rack. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a three-dimensional structure schematic view of the printing assembly of the embodiment of the present application;

[0023] Figure 2 It is a partial sectional view structure schematic view of the printing frame of the embodiment of the present application;

[0024] Figure 3 It is a three-dimensional structure schematic view of the printing member of the embodiment of the present application;

[0025] Figure 4 It is a top view structure schematic view of the turnover assembly and the pushing assembly of the embodiment of the present application;

[0026] Figure 5 This is a side view of the flipping assembly according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the main structure of the positioning component for finding ports according to an embodiment of this utility model;

[0028] Figure 7 This is a side view of the positioning component of this utility model according to an embodiment;

[0029] Figure 8 This is a schematic diagram of the printing frame moving to the left in an embodiment of this utility model;

[0030] Figure 9 This is a schematic diagram of the printing frame moving to the right in an embodiment of this utility model. Detailed Implementation

[0031] The following detailed description illustrates the specific implementation method:

[0032] The reference numerals in the accompanying drawings include: mounting bracket 1, guide rail 2, printing frame 3, first printing area 4, second printing area 5, slider 6, connecting block 7, cylinder 8, scraper 9, first motor 12, first gear 13, first rack 14, second motor 15, pressure bar 16, connector 17, spring 18, through groove 19, steel barrel 20, conveyor frame 21, lifting worktable 22, tilting frame 23, rotating shaft 24, tilting block 25, short rotating shaft 26, long rotating shaft 27, support rod 28, column 29, pushing cylinder 30, push rod 31, lifting platform 32, rotating rod 33, drive motor 34, sensor 35, pressure roller 36, large opening 37, small opening 38.

[0033] Example

[0034] The basic implementation examples are as follows: Figures 1-9 As shown, the automatic printing system for steel drums includes a conveyor frame 21 for transporting steel drums 20. A lifting platform 22 is provided between the conveyor frames 21 and is fixedly installed on the ground. The system also includes a nozzle positioning assembly, a printing assembly, and two sets of tilting assemblies. The tilting assemblies are located at both ends of the conveyor frame 21 and are used to change the transport posture of the steel drums 20. Figure 1 As shown, a mounting frame 1 is fixedly installed on the upper end of the conveyor frame 21. The printing assembly is mounted on the mounting frame 1. The printing assembly includes a guide rail 2, a printing frame 3, a first drive component, and two sets of printing parts. The guide rail 2 is fixedly installed on the upper end of the mounting frame 1. The front and rear inner walls of the mounting frame 1 are symmetrically provided with sliding grooves. The printing frame 3 is slidably installed in the sliding grooves. Figure 2The printing frame 3 is symmetrically and slidably installed on the front and rear sides of the printing frame 3, a plurality of connecting pieces 17 are fixedly installed on the upper end of the connecting piece 17, a limiting block is fixedly installed on the lower end of the connecting piece 17, a pressing strip 16 is fixedly installed on the lower end of the connecting piece 17, and the pressing strip 16 can be in abutment with the edge of the steel drum 20. The pressing strip 16 is made of a rubber material with elasticity, a plurality of springs 18 are arranged between the pressing strip 16 and the printing frame 3, each spring 18 is sleeved on the outer wall of each connecting piece 17, a first printing area 4 and a second printing area 5 are sequentially arranged in the printing frame 3 from left to right, a first driving piece is arranged between the mounting frame 1 and the printing frame 3, and the first driving piece includes a first motor 12, a first gear 13 and a first rack 14. The first motor 12 is fixedly installed on the upper end of the mounting frame 1, the first motor 12 is a servo motor, the first gear 13 is fixedly installed on the output end of the first motor 12, the first rack 14 is fixedly installed on the upper end of the printing frame 3, the first gear 13 is in meshing connection with the first rack 14, and the first driving piece can drive the printing frame 3 to reciprocally move in the mounting frame 1.

[0035] Two groups of printing pieces are symmetrically arranged at one end of the guide rail 2 away from the conveying frame 21, as shown in Figure 1 and Figure 3 The printing piece includes a sliding block 6, a second driving piece, a connecting block 7, a cylinder 8 and a scraper 9. The sliding block 6 is slidably installed on the upper end of the guide rail 2, the sliding block 6 is in the shape of a U, the opening of the sliding block 6 faces the lower end and is wrapped around the outer wall of the guide rail 2, a plurality of through grooves 19 are symmetrically arranged on the side wall of the sliding block 6, the second driving piece is arranged between the sliding block 6 and the guide rail 2, the second driving piece includes a second motor 15, a second gear and a second rack. The second motor 15 is fixedly installed on the upper end of the sliding block 6, the output end of the second motor 15 extends to the space between the sliding block 6 and the guide rail 2 through the sliding block 6, the second motor 15 can be a servo motor, the second gear is fixedly installed on the output end of the second motor 15, and the second rack is fixedly installed on the inner wall of the guide rail 2. The second gear is in meshing connection with the second rack, the second driving piece can drive the sliding block 6 to move on the guide rail 2, the connecting block 7 is fixedly installed on the lower end of the sliding block 6, the cylinder 8 is fixedly installed on the end of the connecting block 7 away from the second motor 15, so that the cylinder 8 and the second motor 15 are not located on the same side of the sliding block 6, and the scraper 9 is fixedly installed on the output end of the cylinder 8. Each scraper 9 can be in abutment with the corresponding first printing area 4 and second printing area 5.

[0036] As shown in Figure 4 and Figure 5 The two groups of turnover assemblies each include a turnover frame 23, a rotating shaft 24, a turnover block 25, a plurality of short rotating shafts 26 and long rotating shafts 27. Two turnover frames 23 are respectively located at the input end and the output end of the conveying frame 21, and the conveying directions of the turnover frames 23 are perpendicular to the conveying direction of the conveying frame 21, as shown in Figure 4The rotating shaft 24 is rotatably installed between the left end inner walls of the turnover frame 23, and a servo motor for driving the rotating shaft 24 to rotate is fixedly installed in the turnover frame 23. The turnover block 25 is fixedly installed on the outer wall of the rotating shaft 24. The turnover block 25 is cuboid-shaped. Four groups of supporting members are uniformly fixedly installed on the outer wall of the turnover block 25. Each group of supporting members is at an angle of 90°. Each group of supporting members includes two supporting rods 28, which are symmetrically fixedly installed on the outer wall of the turnover block 25. The distance between the two supporting rods 28 is less than the diameter of the steel drum 20. A plurality of short rotating shafts 26 are symmetrically rotatably installed in the inner wall of the turnover frame 23 and are located on both sides of the supporting rods 28. A plurality of long rotating shafts 27 are rotatably installed in the inner wall of the turnover frame 23. The inner wall of the turnover frame 23 is provided with motors corresponding to each short rotating shaft 26 and long rotating shaft 27. The motors can drive the corresponding short rotating shaft 26 and long rotating shaft 27 to rotate. The turnover frame 23 located at the input end of the conveying frame 21 transports the steel drum 20 to above the short rotating shaft 26 through the long rotating shaft 27, and then rotates 90° away from the short rotating shaft 26 through the rotating shaft 24, so as to cooperate with the supporting member to overturn the steel drum 20 in the vertical state, and then overturn the steel drum 20 from the vertical state to the flat state. The turnover frame 23 located at the output end of the conveying frame 21 transports the printed steel drum 20 in the flat state to the upper end of the supporting member through the conveying frame 21, and then rotates 90° towards the short rotating shaft 26 through the rotating shaft 24, so as to overturn the steel drum 20 in the flat state to the vertical state and place it on the upper end of the short rotating shaft 26. Then cooperate with the short rotating shaft 26 to rotate and transport the steel drum 20 to the upper end of the long rotating shaft 27 for transportation, so as to avoid scratching the printed steel drum 20 during transportation, and also facilitate subsequent handling of the printed steel drum 20.

[0037] The push assembly is provided at the input end of the conveying frame 21, as shown in Figure 4 The push assembly includes a stand 29, a push cylinder 30, and a push rod 31. The stand 29 is fixedly installed on the ground and located on the side of the supporting member away from the conveying frame 21. The push cylinder 30 is fixedly installed on the upper end of the stand 29. The push rod 31 is fixedly installed on the output end of the push cylinder 30 and can contact the steel drum 20 on the upper end of the supporting rod 28. After the turnover assembly located at the input end of the conveying frame 21 overturns the steel drum 20 to the flat state, the push cylinder 30 is started to move the push rod 31 towards the steel drum 20, so as to push the steel drum 20 on the upper end of the supporting member to the upper end of the conveying frame 21, and then transport the steel drum 20 to the mouth-finding positioning assembly through the conveying frame 21. The push assembly reduces the labor intensity of the workers and improves the production efficiency of the steel drum 20 printing.

[0038] As shown in Figure 6 and Figure 7The shown mouth-finding positioning assembly comprises a lifting table 32, a rotating shaft 33, a driving motor 34 and a sensor 35, the lifting table 32 is arranged between the conveying frames 21 and is fixedly installed on the ground, the driving motor 34 is fixedly installed on the left side of the upper end of the conveying frame 21, the left end of the rotating shaft 33 is fixedly installed on the output end of the driving motor 34, the right end of the rotating shaft 33 is rotatably connected with the inner wall of the conveying frame 21, the outer wall of the rotating shaft 33 is symmetrically fixedly installed with a pressing wheel 36, and the pressing wheel 36 can abut against the outer wall of the steel drum 20, the sensor 35 is fixedly installed on the right end inner wall of the conveying frame 21, and the sensor 35 can identify the large mouth 37 of the steel drum 20, when the large mouth 37 of the steel drum 20 is rotated to the front end of the sensor 35, the sensor 35 identifies the large mouth 37 of the steel drum 20 and transmits an electric signal to the driving motor 34, so as to control the driving motor 34 to stop rotating, and then the large mouth 37 of the steel drum 20 is adjusted to be directly above the steel drum 20, and the small mouth 38 is adjusted to be directly below the steel drum 20, so as to facilitate the subsequent printing, and also improve the printing effect of the steel drum 20.

[0039] The specific implementation process is as follows:

[0040] The staff vertically places the steel drum 20 on the upper end of the long rotating shaft 27 of the first set of turnover assemblies, transports the steel drum 20 to the upper end of the short rotating shaft 26 through the rotation of the long rotating shaft 27, rotates the rotating shaft 24 by 90° to drive the support of the outer wall of the turnover block 25 to rotate, so as to turn the steel drum 20 in the vertical state to the flat-lying state, and the pushing assembly pushes the steel drum 20 located on the upper end of the support to the upper end of the conveying frame 21 for transportation by starting the pushing cylinder 30 to drive the pushing rod 31;

[0041] When the steel drum 20 is transported to the upper end of the lifting table 32, the lifting table 32 lifts the steel drum 20 to be printed to abut against the pressing wheel 36 on the outer wall of the rotating shaft 33, the driving motor 34 drives the rotating shaft 33 to rotate, thereby driving the symmetrically arranged pressing wheels 36 on the outer wall of the rotating shaft 33 to rotate, and further driving the steel drum 20 to rotate, when the large mouth 37 of the steel drum 20 is rotated to the front end of the sensor 35, the sensor 35 identifies the large mouth 37 and transmits an electric signal to the driving motor 34, so as to control the driving motor 34 to stop rotating, and then the large mouths 37 of the steel drums 20 to be printed in the same batch are adjusted to the same position, so as to ensure that the steel drums 20 in the same batch are printed in the same position, when the large mouth 37 of the steel drum 20 to be printed is adjusted to be directly above, the lifting table 32 is lowered and the steel drum 20 to be printed is placed on the conveying frame 21 for transportation;

[0042] The conveyor frame 21 then transports the steel drum 20 to be printed to below the printing station. Once the steel drum 20 is below the printing station, the lifting platform 22 below the conveyor frame 21 lifts the steel drum 20 until the edges of both ends of the steel drum 20 abut against the pressure strip 16 at the lower end of the printing frame 3. At this time, both the left and right scrapers 9 are in their initial positions in the first printing area 4 and the second printing area 5, with the left scraper 9 directly above the steel drum 20. Subsequently, the left scraper 9, under the action of the corresponding cylinder 8, abuts against the first printing area 4. Figure 8 As shown, at this time, the first driving component drives the moving frame to move to the left, thereby causing the steel drum 20 to rotate. Meanwhile, the printed part on the left side does not move and remains relatively stationary with respect to the steel drum 20 to be printed. The printed part on the right side moves synchronously with the printing frame 3 and remains relatively stationary. When the end position of the first printing area 4 moves to below the left scraper 9, the left scraper 9 separates from the first printing area 4 under the action of the corresponding cylinder 8. Simultaneously, the left printed part moves along the moving direction of the printing frame 3 and remains relatively stationary. When the right scraper 9 moves to the printing station above the steel drum 20 to be printed, the second driving component on the right side stops moving, and under the action of the corresponding cylinder 8, the right scraper 9 separates from the first printing area 4. The starting positions of the printing area 5 are connected. As the printing frame 3 continues to move to the left, the text of the second printing area 5 is printed on the outer wall of the steel drum 20. When the ending position of the second printing area 5 moves to the bottom of the right scraper 9, the right scraper 9 is separated from the second printing area 5 under the action of the corresponding cylinder 8. At this time, the first steel drum 20 has completed printing. When the printed steel drum 20 is transported to the end of the conveyor frame 21, the steel drum 20 rolls to the upper end of the support at the output end of the conveyor frame 21. Then, with the rotation of the rotating shaft 24, it rotates 90° to flip the flat steel drum 20 to a vertical position and place it on the upper end of the short rotating shaft 26. Finally, the steel drum 20 is transported to the upper end of the long rotating shaft 27 by the rotation of the short rotating shaft 26. Finally, the steel drum 20 is transported to the designated location by the long rotating shaft 27.

[0043] After the first steel drum 20 is printed, the squeegee 9 of the second set of printed parts is positioned above the printing station. When the next steel drum 20 to be printed is conveyed to the area below the printing station by the conveyor frame 21, the squeegee 9 on the right side, under the action of the corresponding cylinder 8, abuts against the end position of the second printing area 5. Figure 9 As shown, at this time, the printing frame 3 moves to the right. After repeating the above steps in the opposite direction, the printed part on the left will be back on the printing station. The scrapers 9 on the left and right sides are both above the starting positions of the first printing area 4 and the second printing area 5. By continuing to repeat the above operation, different texts and colors can be printed continuously on the same axis of the steel drum 20, which can reduce the number of printing steps of the steel drum 20 and improve the printing efficiency of the steel drum 20.

[0044] The above is only the embodiment of the present application, and the known specific technical solutions and / or common knowledge of characteristics in the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. An automatic printing system for steel drums, comprising a conveying frame, a lifting workbench being arranged in the conveying frame, characterized in that: The application also comprises a mouth-seeking positioning assembly, a printing assembly and two sets of turnover assemblies, the turnover assemblies are arranged at the two ends of the conveying frame, the turnover assemblies are used for changing the transportation posture of the steel drum, the mouth-seeking positioning assembly is arranged between the conveying frame, and the mouth-seeking positioning assembly is used for identifying the large mouth of the steel drum, one end of the conveying frame is provided with a mounting frame, the printing assembly is arranged at one end of the mounting frame, the printing assembly comprises a guide rail, a printing frame, a first driving element and two sets of printing elements, the guide rail is arranged at the end of the mounting frame away from the conveying frame, the printing frame is arranged in the mounting frame, the printing frame is provided with a first printing area and a second printing area, the first driving element is arranged between the mounting frame and the printing frame, the first driving element can drive the printing frame to move, the two sets of printing elements are symmetrically arranged at the end of the guide rail away from the conveying frame, the printing element comprises a sliding block, a second driving element, a connecting block, an air cylinder and a scraper, the sliding block is arranged at the end of the guide rail away from the mounting frame, the second driving element is arranged between the sliding block and the guide rail, the second driving element can drive the sliding block to move on the guide rail, the connecting block is arranged at the end of the sliding block close to the conveying frame, the air cylinder is arranged at one end of the connecting block, the scraper is arranged at the output end of the air cylinder, and each scraper can abut against the corresponding first printing area and second printing area.

2. The steel drum automatic printing system of claim 1, wherein: The turnover assembly comprises a turnover frame, a rotating shaft, a turnover block and a plurality of short rotating shafts and long rotating shafts, the rotating shaft is arranged in the inner wall of the end of the turnover frame close to the conveying frame, the turnover block is arranged on the outer wall of the rotating shaft, the outer wall of the turnover block is uniformly provided with four sets of supporting elements, each set of supporting elements comprises two supporting rods, the two supporting rods are symmetrically arranged on the outer wall of the turnover block, the plurality of short rotating shafts are symmetrically arranged in the inner wall of the turnover frame, and the short rotating shafts are located on the two sides of the supporting rods, and the plurality of long rotating shafts are arranged in the inner wall of the turnover frame and located on the side away from the conveying frame.

3. The steel drum automatic printing system of claim 2, wherein: The application also comprises a pushing assembly, the pushing assembly comprises a stand, a pushing air cylinder and a pushing rod, the stand is arranged on one side of the input end of the conveying frame, the pushing air cylinder is arranged at the upper end of the stand, and the pushing rod is arranged at the output end of the pushing air cylinder and can contact the steel drum at the upper end of the supporting rod.

4. The steel drum automatic printing system of claim 3, wherein: The mouth-seeking positioning assembly comprises a lifting platform, a rotating rod, a driving motor and a sensor, the lifting platform is arranged in the conveying frame, the driving motor is arranged at one end of the conveying frame, the rotating rod is arranged at the output end of the driving motor, the other end of the rotating rod is rotationally connected with the conveying frame, the outer wall of the rotating rod is symmetrically provided with a pressing wheel, and the pressing wheel can abut against the outer wall of the steel drum, and the sensor is arranged at one end of the conveying frame close to the opening of the steel drum and can identify the large mouth of the steel drum.

5. The steel drum automatic printing system of claim 4, wherein: The first driving element comprises a first motor, a first gear and a first rack, the first motor is arranged at one end of the mounting frame, the first gear is arranged at the output end of the first motor, and the first rack is arranged at one end of the printing frame close to the guide rail, and the first gear is engaged with the first rack.

6. The steel drum automatic printing system of claim 5, wherein: The second driving element comprises a second motor, a second gear and a second rack, the second motor is arranged at one end of the sliding block away from the guide rail, the output end of the second motor penetrates through the sliding block, the second gear is arranged at the output end of the second motor, and the second rack is arranged in the inner wall of the guide rail, and the second gear is engaged with the second rack.

7. The steel drum automatic printing system of claim 6, wherein: The end of the printing frame close to the conveying frame is symmetrically provided with a pressing strip, and the pressing strip can abut against the edge of the steel drum, and a plurality of springs are arranged between the pressing strip and the printing frame.

8. The steel drum automatic printing system of claim 7, wherein: The sliding block is in the shape of a U, the opening of the sliding block faces the end close to the printing frame, and the side wall of the sliding block is symmetrically provided with a through groove.

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