Screen printing method for double-color steel drum

Abstract

The invention relates to the technical field of steel drum screen printing, and discloses a double-color steel drum screen printing method which comprises a conveying frame, a lifting workbench is arranged in the conveying frame, the conveying frame is provided with a mounting frame, the printing assembly is arranged at one end of the mounting frame, and the printing assembly comprises a guide rail, a printing frame, a first driving part and two sets of printing parts. The guide rail is arranged at one end of the mounting frame, the printing frame is arranged in the mounting frame, a first printing area and a second printing area are formed in the printing frame, the first driving part is arranged between the mounting frame and the printing frame, the two sets of printing parts are arranged at one end of the guide rail, and all the printing parts can abut against the printing frame. Different copywriting is printed on the outer wall of the steel drum in the same axial direction through the printing assembly, the steel drum printing step is simplified, meanwhile, the printing frame continues to move by a certain distance, pigment accumulated at the lower end of a printing piece moves to the next printing path, and therefore the printed pigment is prevented from being located at the two ends of the printing path all the time.

Description

Technical Field

[0001] The invention relates to the technical field of steel drum silk screen printing, and in particular to a two-color steel drum silk screen printing method. Background Art

[0002] As an efficient packaging container, steel drums are widely used for the transportation and storage of liquid, solid and semi-solid products. Existing steel drums are usually equipped with a large mouth and a small mouth. The large mouth is mainly used for quick loading and unloading of materials, cleaning and maintenance, and is the main operating mouth of the steel drum. The small mouth is mainly used for auxiliary exhaust, controlling material flow rate or installing accessories, and is the auxiliary function mouth of the steel drum. Before use, the outer wall of the steel drum often needs to be printed with label information to identify the contents. At present, screen printing is the main technology for printing the outer wall of steel drums.

[0003] The prior art discloses (publication number: CN100577420C) a steel drum multi-color automatic screen printing machine, the technical key points of which are that the conveying devices are respectively fixed to the front and rear ends of the printing frame, the printing mechanism is located directly above the frame, the positioning gear device is fixed to the rear of the frame, the lifting table is fixed to the bottom of the frame, and the drying device is located directly above the rear conveying frame. With such a structure, the steel drum is delivered to the printing position by the front conveying frame, the lifting table holds up the steel drum, and after the positioning cylinder finds the refueling port and fastens the barrel body to the large gear, it is driven by the same cylinder to complete the printing process of synchronously moving the screen and rotating the barrel body, thereby ensuring the accuracy of multi-color overprinting. The advantages of the present invention are good overprinting accuracy, stable color, fast production speed, and can be put into industrial production.

[0004] However, the existing technology can only print multiple colors on different axes of the same steel drum, but cannot print different colors or different texts on the same axis of the steel drum, resulting in the need for secondary printing of the steel drum to achieve printing of different colors or different texts on the same axis, which greatly reduces the efficiency of steel drum printing. To this end, we propose a two-color steel drum screen printing method to solve the above problem. Summary of the invention

[0005] The present invention is intended to provide a two-color steel drum screen printing method. With the existing technology, multiple colors can only be printed on different axes of the same steel drum, resulting in the need for secondary printing of the steel drum to achieve printing of different colors or different texts on the same axis, which greatly reduces the printing efficiency of the steel drum.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a two-color steel drum screen printing method, comprising a conveying frame, a lifting workbench is arranged in the conveying frame, and also comprises a port finding and positioning component and a printing component, a mounting frame is arranged at one end of the conveying frame, and the printing component is arranged at one end of the mounting frame, and the printing component comprises a guide rail, a printing frame, a first driving member and two groups of printing members, the guide rail is arranged at one end of the mounting frame, the printing frame is arranged in the mounting frame, and a first printing area and a second printing area are opened in the printing frame, the first driving member is arranged between the mounting frame and the printing frame, and the two groups of printing members are arranged at one end of the guide rail, and each printing member can abut against the printing frame. The two-color steel drum screen printing method comprises the following steps:

[0007] Step 1, the first group of printed parts and the second group of printed parts are located at the starting positions of the first printing area and the second printing area respectively, and the first group of printed parts is located above the lifting workbench;

[0008] Step 2: The conveyor frame transports the steel barrel to the top of the port-finding and positioning assembly, and adjusts the steel barrel to the specified position and then transports it to the lifting workbench;

[0009] Step 3, the lifting table lifts the steel drum to make it abut against the printing frame, and the first group of printing parts abuts against the starting position of the first printing area;

[0010] Step 4, the first driving member drives the printing frame to move, and the first group of printing members and the steel drum are relatively stationary, and the second group of printing members and the printing frame move synchronously and remain relatively stationary;

[0011] Step 5, when the end of the first printing area moves to below the first group of printing pieces, the first group of printing pieces separates from the first printing area and moves along the direction in which the printing frame moves;

[0012] Step 6, when the second group of printed parts moves to the top of the steel drum, the second group of printed parts abuts against the starting position of the second printing area;

[0013] Step 7, when the end of the second printing area moves to below the second group of printed parts, the second group of printed parts separates from the second printing area, and the first group of printed parts stops moving;

[0014] Step 8, after the first group of printed parts stops moving, the printing frame continues to move 5-10 cm and then stops;

[0015] Step 9, the printing assembly operates in reverse according to the above steps to print the next steel drum.

[0016] The beneficial effects of this solution are as follows: the steel drum is adjusted to the same printing position by the mouth-finding positioning component to prevent the different text positions between the steel drums during subsequent printing, which affects the appearance of the steel drum; the first printing area and the second printing area are provided in the printing frame, so that different texts or colors can be set in the first printing area and the second printing area respectively, and the corresponding printing parts are abutted against the printing frame, so that the moving printing frame prints the complete text on the outer wall of the steel drum under the action of the printing parts; the mounting frame is used to install the printing components, and the lifting workbench is used to lift the steel drum to be printed, so that the steel drum to be printed abuts against the lower end of the printing frame; the first driving member is used to drive the printing frame to reciprocate, and when the printing frame moves, it can drive the steel drum abutting therewith to rotate, so that the pigment in the printing frame can be scraped in cooperation with the stationary printing parts, so that the printing The text in the frame is evenly printed on the outer wall of the steel drum. After the first group of printing parts prints the text in the first printing area on the outer wall of the steel drum, the first group of printing parts is separated from the first printing area and moves with the printing frame to leave the printing station. When the second group of printing parts moves to the printing station, the second group of printing parts stops moving and abuts against the second printing area, thereby printing the text in the second printing area on the outer wall of the steel drum. After the second group of printing parts completes printing the text in the second printing area, it 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, simplifying the steps of steel drum printing, and at the same time, the printing frame continues to move a distance, so that the pigment accumulated at the lower end of the printing part moves to the path of the next printing, thereby avoiding the printed pigment always being located at both ends of the printing path, resulting in waste of printing pigment.

[0017] Preferably, as an improvement, the mouth-finding and positioning assembly includes 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 rotatably connected to the conveying frame, the outer wall of the rotating rod is symmetrically provided with pressure wheels, and the pressure wheels can abut against the outer wall of the steel barrel, the sensor is arranged at one end of the conveying frame close to the opening of the steel barrel, and the sensor can identify the large mouth of the steel barrel.

[0018] The beneficial effects are as follows: the lifting platform is used to lift the steel drum, so that the steel drum abuts against the pressure wheel on the outer wall of the rotating rod, and the driving motor is used to drive the rotating rod to rotate, thereby driving the pressure wheels symmetrically arranged on the outer wall of the rotating rod to rotate, and then driving the steel drum to rotate. When the large mouth of the steel drum rotates to the front end of the sensor, the sensor recognizes the large mouth and transmits an electrical signal to the driving motor, thereby controlling the driving motor to stop rotating, and then adjusting the large mouth of the steel drum to a uniform position, which is convenient for subsequent printing and improves the printing effect of the steel drum.

[0019] Preferably, as an improvement, the first driving member includes 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, the first rack is arranged at one end of the printing frame close to the guide rail, and the first gear is meshed with the first rack.

[0020] The beneficial effect is that the first rack is arranged at one end of the printing frame close to the mounting frame, and then matched with the first gear arranged at the output end of the first motor, so that the printing frame is driven to move by starting the motor.

[0021] Preferably, as an improvement, the printing element includes a slider, a second driving element, a connecting block, a cylinder and a scraper, the slider is arranged at one end of the guide rail away from the mounting frame, the second driving element is arranged between the slider and the guide rail, the second driving element can move the slider on the guide rail, the connecting block is arranged at one end of the slider close to the conveying frame, the cylinder is arranged at one end of the connecting block, the scraper is arranged at the output end of the cylinder, and each scraper can abut against the corresponding first printing area and second printing area.

[0022] The beneficial effects are: the second driving member is used to move the slider on the upper end of the guide rail, the connecting block is used to install the cylinder, the cylinder is used to control the extension and retraction of the scraper, and the scraper is used to push the printing pigment evenly through the printing frame, thereby printing the text in the printing frame onto the outer wall of the steel drum.

[0023] Preferably, as an improvement, the second driving member includes a second motor, a second gear and a second rack, the second motor is arranged at the end of the slider away from the guide rail, and the output end of the second motor passes through the slider, the second gear is arranged at the output end of the second motor, the second rack is arranged on the inner wall of the guide rail, and the second gear is meshed with the second rack.

[0024] The beneficial effect is: by starting the second motor to drive the second gear to rotate, the second gear moves along the second rack meshing with it, thereby driving the slider to move on the outer wall of the guide rail.

[0025] Preferably, as an improvement, a pressure strip is symmetrically provided at one end of the printing frame close to the conveying frame, and the pressure strip can abut against the edge of the steel drum, and a plurality of springs are provided between the pressure strip and the printing frame.

[0026] The beneficial effects are as follows: by arranging a pressure strip at the lower end of the printing frame, the friction between the printing frame and the steel drum is increased, thereby preventing the steel drum from slipping and causing misprinting; by arranging a number of springs between the pressure strip and the printing frame, not only the impact force on the printing frame when the steel drum and the pressure strip abut against each other can be reduced, but also the pressure strip can be made to contact more closely with the edge of the steel drum, thereby further preventing the steel drum from slipping.

[0027] Preferably, as an improvement, the slider is configured to be U-shaped, the opening of the slider faces the end close to the printing frame, and the side walls of the slider are symmetrically provided with through grooves.

[0028] The beneficial effects are: by setting the slider to be U-shaped, the slider is half-wrapped in the outer wall of the guide rail, the stability of the slider during movement is increased, and by opening a through groove on the side wall of the slider, the weight of the slider can be reduced, reducing the wear between the second gear and the second rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the three-dimensional structure of a printing assembly according to an embodiment of the present invention;

[0030] Figure 2 It is a partial cross-sectional structural schematic diagram of a printing frame according to an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a three-dimensional structure of a printed part according to an embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of the top view of the flip assembly and the pushing assembly according to an embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of the side structure of the flip assembly according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the main structure of the port finding and positioning assembly according to an embodiment of the present invention;

[0035] Figure 7 It is a schematic diagram of the side view structure of the port finding and positioning assembly according to an embodiment of the present invention;

[0036] Figure 8 It is a schematic diagram of the printing frame moving to the left according to the embodiment of the present invention;

[0037] Fig. 9 It is a schematic diagram of the printing frame moving to the right according to the embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following is further described in detail through specific implementation methods:

[0039] The figure marks in the drawings of the specification include: mounting frame 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, connecting piece 17, spring 18, through slot 19, steel drum 20, conveying frame 21, lifting workbench 22, turning frame 23, rotating shaft 24, turning 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, driving motor 34, sensor 35, pressure wheel 36, large mouth 37, small mouth 38.

[0040] Example

[0041] The embodiment is basically as shown in the attached Figure 1-9 As shown, a two-color steel drum screen printing method includes a conveyor frame 21, the conveyor frame 21 is used to transport the steel drum 20, a lifting workbench 22 is arranged between the conveyor frames 21, and the lifting workbench 22 is fixedly installed on the ground, and also includes a port finding and positioning component, a printing component and two groups of flipping components, the flipping components are arranged at both ends of the conveyor frame 21, and the flipping components are used to change the transportation posture of the steel drum 20, such as Figure 1 As shown, a mounting frame 1 is fixedly mounted on the upper end of the conveying frame 21, and a printing assembly is arranged on the mounting frame 1. The printing assembly includes a guide rail 2, a printing frame 3, a first driving member, and two sets of printing members. The guide rail 2 is fixedly mounted on the upper end of the mounting frame 1. Slide grooves are symmetrically provided on the front and rear inner walls of the mounting frame 1. The printing frame 3 is slidably mounted in the slide grooves. Figure 2 The printing frame 3 shown in the figure is symmetrically slidably installed with a plurality of connecting members 17 on both sides of the front and rear sides. A limit block is fixedly installed on the upper end of the connecting member 17. A pressure strip 16 is fixedly installed on the lower end of the connecting member 17 on the same side. The pressure strip 16 can abut against the edge of the steel drum 20. The pressure strip 16 is made of elastic rubber material. A plurality of springs 18 are arranged between the pressure strip 16 and the printing frame 3. Each spring 18 is sleeved on the outer wall of each connecting member 17. The first printing area 4 and the second printing area are sequentially opened from left to right in the printing frame 3. 5. The first driving member is arranged between the mounting frame 1 and the printing frame 3. The first driving member comprises a first motor 12, a first gear 13 and a first rack 14. The first motor 12 is fixedly mounted on the rear side of the upper end of the mounting frame 1. The first motor 12 is set as a servo motor. The first gear 13 is fixedly mounted on the output end of the first motor 12. The first rack 14 is fixedly mounted on the rear side of the upper end of the printing frame 3. The first gear 13 is meshed with the first rack 14. The first driving member can drive the printing frame 3 to reciprocate in the mounting frame 1.

[0042] The two sets of printing pieces are symmetrically arranged at one end of the guide rail 2 away from the conveying frame 21. Figure 1 and Figure 3The printing member shown includes a slider 6, a second driving member, a connecting block 7, a cylinder 8 and a scraper 9. The slider 6 is slidably mounted on the upper end of the guide rail 2. The slider 6 is set to be in a U-shaped shape. The opening of the slider 6 faces the lower end and is wrapped around the outer wall of the guide rail 2. The side wall of the slider 6 is symmetrically provided with a plurality of through grooves 19. The second driving member is arranged between the slider 6 and the guide rail 2. The second driving member includes a second motor 15, a second gear and a second rack. The second motor 15 is fixedly mounted on the upper end of the slider 6, and the output end of the second motor 15 passes through the slider 6 and extends between the slider 6 and the guide rail 2. The second motor 15 can It is set as a servo motor, the second gear is fixedly installed on the output end of the second motor 15, the second rack is fixedly installed on the inner wall of the guide rail 2, and the second gear is meshed with the second rack, the second driving member can drive the slider 6 to move on the guide rail 2, the connecting block 7 is fixedly installed on the lower end of the slider 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 slider 6, the scraper 9 is fixedly installed on the output end of the cylinder 8, and each scraper 9 can abut against the corresponding first printing area 4 and second printing area 5.

[0043] like Figure 4 and Figure 5 The two groups of flipping assemblies shown in the figure both include a flipping frame 23, a rotating shaft 24, a flipping block 25, and a plurality of short rotating shafts 26 and a long rotating shaft 27. The two flipping frames 23 are respectively located at the input end and the output end of the conveying frame 21, and the transport direction of the flipping frames 23 is perpendicular to the transport direction of the conveying frame 21. Figure 4The rotating shaft 24 shown is rotatably installed between the inner walls of the left end of the flip frame 23, and a servo motor for driving the rotating shaft 24 to rotate is fixedly installed in the flip frame 23, and the flip block 25 is fixedly installed on the outer wall of the rotating shaft 24. The flip block 25 is set in a rectangular shape. Four groups of support members are evenly fixedly installed on the outer wall of the flip block 25, and each group of support members forms a 90° angle. Each group of support members includes two support rods 28, and the two support rods 28 are symmetrically fixedly installed on the outer wall of the flip block 25, and the distance between the two support rods 28 is less than the diameter of the steel drum 20. A number of short rotating shafts 26 rotate symmetrically on the inner wall of the flip frame 23, and the short rotating shafts 26 are located on both sides of the support rods 28. A number of long rotating shafts 27 are rotatably installed on the inner wall of the flip frame 23, and the inner wall of the flip frame 23 is provided with motors corresponding to each short rotating shaft 26 and long rotating shaft 27, and the motors can drive the corresponding short rotating shafts 26 and long rotating shafts 2 7 is rotated, the turning frame 23 located at the input end of the conveying frame 21 transports the steel drum 20 to the top of the short rotating shaft 26 through the long rotating shaft 27, and then rotates 90° in the direction away from the short rotating shaft 26 through the rotating shaft 24, so as to cooperate with the support to turn over the vertical steel drum 20, and then turn the steel drum 20 from the vertical state to the lying state, and the turning frame 23 located at the output end of the conveying frame 21 transports the printed steel drum 20 to the upper end of the support through the conveying frame 21 in a lying state, and then rotates 90° in the direction close to the short rotating shaft 26 through the rotating shaft 24, so as to turn the lying steel drum 20 to the vertical state and place it on the upper end of the short rotating shaft 26, and then cooperates with the rotation of the short rotating shaft 26 to transport the steel drum 20 to the upper end of the long rotating shaft 27 for transportation, thereby avoiding scratches on the printed steel drum 20 during transportation, and also facilitating the subsequent handling of the printed steel drum 20.

[0044] It also includes a pushing component, which is arranged at the input end of the conveying frame 21. Figure 4 The pushing assembly shown includes a column 29, a pushing cylinder 30 and a pushing rod 31. The column 29 is fixedly installed on the ground, and the column 29 is located on the side of the support away from the conveying rack 21. The pushing cylinder 30 is fixedly installed on the upper end of the column 29, and the pushing rod 31 is fixedly installed on the output end of the pushing cylinder 30, and the pushing rod 31 can contact the steel barrel 20 at the upper end of the support rod 28. When the flip assembly located at the input end of the conveying rack 21 flips the steel barrel 20 to a lying state, the pushing cylinder 30 is started to push the pushing rod 31 to move toward the steel barrel 20, thereby pushing the steel barrel 20 located at the upper end of the support to the upper end of the conveying rack 21, and then transporting the steel barrel 20 to the mouth-finding positioning assembly through the conveying rack 21, and pushing the steel barrel 20 to the upper end of the conveying rack 21 through the pushing assembly, which reduces the labor intensity of the staff and improves the production efficiency of printing the steel barrel 20.

[0045] like Figure 6 and Figure 7The port finding and positioning assembly shown includes a lifting platform 32, a rotating rod 33, a driving motor 34 and a sensor 35. The lifting platform 32 is arranged between the conveying frames 21, and the lifting platform 32 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 rod 33 is fixedly installed on the output end of the driving motor 34. The right end of the rotating rod 33 is rotatably connected to the inner wall of the conveying frame 21. The outer wall of the rotating rod 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 outer wall of the steel drum 20. It is fixedly installed on the inner wall of the right end of the conveying frame 21, and the sensor 35 can identify the large mouth 37 of the steel barrel 20. When the large mouth 37 of the steel barrel 20 rotates to the front end of the sensor 35, the sensor 35 identifies the large mouth 37 of the steel barrel 20 and transmits an electrical signal to the drive motor 34, thereby controlling the drive motor 34 to stop rotating, and then adjusting the large mouth 37 of the steel barrel 20 to the top of the steel barrel 20, and the small mouth 38 to the bottom of the steel barrel 20, so as to facilitate subsequent printing and improve the printing effect of the steel barrel 20.

[0046] The two-color steel drum screen printing method includes the following steps:

[0047] Step 1, the first group of printed parts and the second group of printed parts are located at the starting positions of the first printing area 4 and the second printing area 5 respectively, and the scraper 9 of the first group of printed parts is located directly above the lifting workbench 22;

[0048] Step 2, the conveyor frame 21 conveys the steel barrel 20 to the top of the lifting platform 32, and then the lifting platform 32 lifts the steel barrel 20 and makes the outer wall of the steel barrel 20 abut against the pressure wheel 36, and then the driving motor 34 starts and drives the rotating rod 33 to rotate, so that the pressure wheel 36 abutting against the steel barrel 20 rotates, and then drives the steel barrel 20 to rotate between the pressure wheel 36 and the lifting platform 32. When the large mouth 37 of the steel barrel 20 rotates to the front end of the sensor 35, the sensor 35 recognizes the large mouth 37 and transmits an electrical signal to the driving motor 34, and the driving motor 34 Stop rotating, so as to adjust the large mouth 37 of the steel barrel 20 to a uniform position, then the lifting platform 32 descends and places the steel barrel 20 on the upper end of the conveying rack 21, and the conveying rack 21 then transports the adjusted steel barrel 20 to the upper end of the lifting workbench 22. Since the printing is performed from the large mouth 37 of the steel barrel 20, the position of the printed text on the outer wall of the steel barrel 20 is consistent regardless of whether the printing is performed in the clockwise direction or the counterclockwise direction of the steel barrel 20, so that the position of the printed text of the same batch of steel barrels 20 is consistent, which increases the beauty of the steel barrel 20;

[0049] Step 3, such as Figure 8 As shown, the lifting table 22 lifts the steel drum 20 to separate it from the conveying frame 21 and abuts against the pressure strip 16 at the lower end of the printing frame 3, and then the cylinder 8 of the first group of printing pieces controls the scraper 9 to abut against the starting position of the first printing area 4;

[0050] Step 4, the first driving member drives the printing frame 3 to move leftward, and the scraper 9 of the first group of printed parts and the steel drum 20 are relatively stationary, and the second driving member of the second group drives the second group of printed parts and the printing frame 3 to move leftward synchronously and remain relatively stationary;

[0051] Step 5, when the end of the first printing area 4 moves to below the scraper 9 of the first group of printed parts, the cylinder 8 of the first group of printed parts controls the scraper 9 to separate from the first printing area 4. After the scraper 9 of the first group of printed parts separates from the first printing area 4, the driving member of the first group drives the slider 6 to move leftward on the outer wall of the guide rail 2, and the moving speed of the first group of printed parts is equal to the moving speed of the printing frame 3, that is, the scraper 9 of the first group of printed parts is still located directly above the end position of the first printing area 4 during the movement;

[0052] Step 6, when the scraper 9 of the second group of printed parts moves to above the steel drum 20, the start control of the second group of printed parts corresponds to the scraper 9 abutting against the starting position of the second printing area 5;

[0053] Step 7, as the printing frame 3 continues to move, when the end of the second printing area 5 moves below the scraper 9 of the second group of printed parts, the cylinder 8 of the second group of printed parts controls the corresponding scraper 9 to separate from the second printing area 5, and the first group of printed parts stops moving;

[0054] Step 8, when the first group of printed pieces stops moving, the lifting table 22 drives the steel drum 20 after printing to descend, and places the steel drum 20 after printing on the upper end of the conveying rack 21 and conveys it, while the printing frame 3 continues to move to the left for a distance and then stops. The distance is set to 5-10 cm, so that the pigment accumulated at one end of the printed piece moves to the path of the next printing, thereby avoiding the printed pigment always being located at both ends of the printing path, resulting in waste of printing pigment;

[0055] Step 9, such as Fig. 9 As shown in the figure, when the second steel drum 20 to be printed is transported to the upper end of the lifting workbench 22 after passing through the port finding and positioning assembly, the printing frame 3 is located on the left side of the second steel drum 20 to be printed. At this time, the printing frame 3 moves to the right, and the second group of printed parts remains stationary. The first group of printed parts moves to the right and remains relatively stationary with the printing frame 3. After the printing assembly operates in the reverse direction according to the above steps, the second steel drum 20 is printed, and the printing frame 3 and the printing assembly return to the position shown in the figure. Figure 8 state, so as to facilitate printing on the next steel barrel 20.

[0056] The specific implementation process is as follows:

[0057] The staff vertically places the steel drum 20 on the upper end of the long shaft 27 of the first set of flipping components, and transports the steel drum 20 to the upper end of the short shaft 26 by rotating the long shaft 27. The shaft 24 rotates 90° to drive the support member on the outer wall of the flip block 25 to rotate, thereby flipping the steel drum 20 in the vertical state to a lying state. The pushing component starts the pushing cylinder 30 to push the push rod 31, thereby pushing the steel drum 20 located at the upper end of the support member to the upper end of the conveying rack 21 for transportation;

[0058] When the steel drum 20 is transported to the upper end of the lifting platform 32, the lifting platform 32 lifts the steel drum 20 to be printed so that it abuts against the pressure wheel 36 on the outer wall of the rotating rod 33, and the driving motor 34 drives the rotating rod 33 to rotate, thereby driving the pressure wheel 36 symmetrically arranged on the outer wall of the rotating rod 33 to rotate, and then driving the steel drum 20 to rotate. When the large mouth 37 of the steel drum 20 rotates to the front end of the sensor 35, the sensor 35 recognizes the large mouth 37 and transmits an electrical signal to the driving motor 34, thereby controlling the driving motor 34 to stop rotating, and then adjusting the large mouth 37 of the steel drum 20 to be printed to a uniform position. When the large mouth 37 of the steel drum 20 to be printed is adjusted to the top, the lifting platform 32 descends and places the printed steel drum 20 on the top of the conveying rack 21 for transportation;

[0059] The conveyor frame 21 then transports the steel drum 20 to be printed to the bottom of the printing station. When the steel drum 20 to be printed moves to the bottom of the printing station, the lifting workbench 22 under the conveyor frame 21 lifts the steel drum 20 to be printed until the edges of the front and rear ends of the steel drum 20 to be printed abut against the pressure strip 16 at the lower end of the printing frame 3. At this time, the scraper 9 on the left and the scraper 9 on the right are both located at the initial positions of the first printing area 4 and the second printing area 5, and the scraper 9 on the left is located directly above the steel drum 20 to be printed. Subsequently, the scraper 9 on the left abuts against the first printing area 4 under the action of the corresponding cylinder 8, as shown in FIG. Figure 8As shown, at this time, the first driving member drives the moving frame to move to the left, thereby driving the steel drum 20 to rotate, and at this time, the printing piece on the left does not move and remains relatively still with the steel drum 20 to be printed, while the printing piece on the right moves synchronously with the printing frame 3 and remains relatively still. When the end position of the first printing area 4 moves to below the left scraper 9, the left scraper 9 is separated from the first printing area 4 under the action of the corresponding cylinder 8, and while the left scraper 9 is separated from the first printing area 4, the printing piece on the left moves along the moving direction of the printing frame 3 and remains relatively still. When the right scraper 9 moves to the printing station, that is, above the steel drum 20 to be printed, the second driving member on the right stops moving, and under the action of the corresponding cylinder 8, the right scraper 9 and the second printing The starting position of the brush area 5 is abutted, and 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 end position of the second printing area 5 moves to the bottom of the right scraper 9, the scraper 9 on the right 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 steel drum 20 after printing is transported to the end of the conveyor rack 21, the steel drum 20 rolls to the upper end of the support at the output end of the conveyor rack 21, and then cooperates with the rotating shaft 24 to rotate 90°, flipping the lying steel drum 20 to a vertical state and located at the upper end of the short rotating shaft 26, and 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, and finally the steel drum 20 is transported to the designated location by the long rotating shaft 27;

[0060] After the first steel drum 20 is printed, the scraper 9 of the second group of printed parts is located above the printing station. When the next steel drum 20 to be printed is transported to the bottom of the printing station by the conveyor 21, the scraper 9 on the right side abuts against the end position of the second printing area 5 under the action of the corresponding cylinder 8. Fig. 9 As shown, the printing frame 3 moves to the right at this time, and after repeating the above steps in the reverse direction, the printed part on the left will be located on the printing station again, and the scrapers 9 on the left and right are both located above the starting positions of the first printing area 4 and the second printing area 5, thereby continuing to repeat the above operations, and different texts and colors can be continuously printed on the same axial direction of the steel drum 20, which can reduce the process of printing the steel drum 20 and improve the efficiency of printing the steel drum 20.

[0061] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A two-color steel drum screen printing method, comprising a conveyor frame, wherein a lifting workbench is provided in the conveyor frame, characterized in that: It also includes a port finding and positioning component and a printing component. A mounting frame is provided at one end of the conveying frame. The printing component is provided at one end of the mounting frame. The printing component includes a guide rail, a printing frame, a first driving member and two groups of printing members. The guide rail is provided at one end of the mounting frame. The printing frame is provided in the mounting frame. A first printing area and a second printing area are provided in the printing frame. The first driving member is provided between the mounting frame and the printing frame. The two groups of printing members are provided at one end of the guide rail. Each printing member can abut against the printing frame. The two-color steel drum screen printing method includes the following steps: Step 1, the first group of printed parts and the second group of printed parts are located at the starting positions of the first printing area and the second printing area respectively, and the first group of printed parts is located above the lifting workbench; Step 2: The conveyor frame transports the steel barrel to the top of the port-finding and positioning assembly, and adjusts the steel barrel to the specified position and then transports it to the lifting workbench; Step 3, the lifting table lifts the steel drum to make it abut against the printing frame, and the first group of printing parts abuts against the starting position of the first printing area; Step 4, the first driving member drives the printing frame to move, and the first group of printing members and the steel drum are relatively stationary, and the second group of printing members and the printing frame move synchronously and remain relatively stationary; Step 5, when the end of the first printing area moves to below the first group of printing pieces, the first group of printing pieces separates from the first printing area and moves along the direction in which the printing frame moves; Step 6, when the second group of printed parts moves to the top of the steel drum, the second group of printed parts abuts against the starting position of the second printing area; Step 7, when the end of the second printing area moves to below the second group of printed parts, the second group of printed parts separates from the second printing area, and the first group of printed parts stops moving; Step 8, after the first group of printed parts stops moving, the printing frame continues to move 5-10 cm and then stops; Step 9, the printing assembly operates in reverse according to the above steps to print the next steel drum.

2. A two-color steel drum screen printing method according to claim 1, characterized in that: The mouth-finding and positioning assembly includes 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, and the other end of the rotating rod is rotatably connected to the conveying frame. The outer wall of the rotating rod is symmetrically provided with pressure wheels, and the pressure wheels can abut against the outer wall of the steel barrel. The sensor is arranged at one end of the conveying frame close to the opening of the steel barrel, and the sensor can identify the large mouth of the steel barrel.

3. A two-color steel drum screen printing method according to claim 2, characterized in that: The first driving member includes 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, the first rack is arranged at one end of the printing frame close to the guide rail, and the first gear is meshed with the first rack.

4. A two-color steel drum screen printing method according to claim 3, characterized in that: The printing element includes a slider, a second driving element, a connecting block, a cylinder and a scraper. The slider is arranged at one end of the guide rail away from the mounting frame. The second driving element is arranged between the slider and the guide rail. The second driving element can move the slider on the guide rail. The connecting block is arranged at one end of the slider close to the conveying frame. The cylinder is arranged at one end of the connecting block. The scraper is arranged at the output end of the cylinder, and each scraper can abut against the corresponding first printing area and second printing area.

5. A two-color steel drum screen printing method according to claim 4, characterized in that: The second driving member includes a second motor, a second gear and a second rack. The second motor is arranged at an end of the slider away from the guide rail, and the output end of the second motor passes through the slider. The second gear is arranged at the output end of the second motor, the second rack is arranged on the inner wall of the guide rail, and the second gear is meshed with the second rack.

6. A two-color steel drum screen printing method according to claim 5, characterized in that: A pressure strip is symmetrically arranged at one end of the printing frame close to the conveying frame, and the pressure strip can abut against the edge of the steel drum, and a plurality of springs are arranged between the pressure strip and the printing frame.

7. A two-color steel drum screen printing method according to claim 6, characterized in that: The sliding block is arranged 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 through grooves.

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