Automatic barrel surface silk-screen printing equipment for top of steel barrel

Abstract

The utility model discloses an automatic barrel surface silk-screen printing device for the top of a steel barrel. The automatic barrel surface silk-screen printing device comprises a rack, a conveying channel, a pre-positioning station and a printing station. The pre-positioning station is provided with first clamping parts symmetrically distributed on the two sides of the conveying channel, and a first friction driving mechanism is arranged on the inner side of the pre-positioning station. The printing station is correspondingly provided with a second clamping component and a second friction driving mechanism. Recognition positioning devices are arranged above the double stations, a liftable plane screen printing machine is arranged above the printing station, and an ink scraping device of the liftable plane screen printing machine is accurately positioned through a three-axis moving mechanism. The control device is linked with each component to dynamically adjust the position of the steel drum based on the identification signal. According to the utility model, through double-station collaborative operation of combining coarse adjustment of the pre-positioning station with fine adjustment of the printing station, accurate alignment of hole sites at the top of the steel drum is realized. The plane screen printing machine controls the ink scraping plate to ascend and descend through three-axis movement, the problem of manual alignment deviation is solved, the printing precision and the production efficiency are remarkably improved, and full-process automatic operation of equipment is achieved in cooperation with a built-in program of a control device.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel drum silk screen printing automation equipment field especially, a kind of automatic barrel surface silk screen printing equipment for steel drum top. BACKGROUND

[0002] As an important branch of block printing, the principle of silk screen printing technology is to transfer ink to the surface of the printing material through the transparent hole of the screen printing plate. It has the characteristics of simple equipment, strong adaptability and low cost, and is especially suitable for printing on the plane and curved surface of metal containers such as steel drums. Traditional steel drum silk screen printing mainly relies on manual operation: workers need to manually align the silk screen printing plate with the top or body of the steel drum, and complete the ink transfer by applying pressure with a squeegee. However, this purely manual method has significant drawbacks such as low efficiency, poor accuracy, and high labor intensity. Manual operation not only consumes time and effort, but is also greatly affected by the experience and state of the worker, and the printing position is prone to deviation, resulting in a high scrap rate, especially in mass production, the efficiency bottleneck is particularly prominent.

[0003] To improve production efficiency, some enterprises have tried to introduce semi-automatic equipment, such as conveying steel drums to fixed workstations through a conveyor belt, and completing printing with a simple clamping mechanism. However, the existing equipment still has many shortcomings: first, steel drums are prone to offset during transportation due to mechanical vibration or inertia, and additional manual correction is required after entering the printing workstation. There is a lack of coordinated control and linkage logic between the pre-positioning and printing workstations, and the overall process still relies on manual control to connect, which seriously slows down the production rhythm; second, as the steel drum manufacturing industry demands higher efficiency and precision, traditional equipment still relies on manual visual adjustment in key positioning steps, such as the alignment of large and small holes on the top of the steel drum, and lacks automatic identification and feedback mechanisms, making it difficult to meet the high-end demand for printing accuracy.

[0004] In summary, there is an urgent need to develop a fully automatic silk screen printing equipment that integrates automatic identification and multi-station coordinated control to solve the above problems. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of automatic barrel surface silk screen printing equipment for steel drum top, by integrating steel drum hole position automatic identification, multi-station coordinated positioning function, realize efficient automation production, to solve the technical defects of low printing efficiency, manual correction accuracy deficiency and printing accuracy in prior art.

[0006] To achieve the above purpose, the utility model adopts the following scheme: a kind of automatic barrel surface silk screen printing equipment for steel drum top, comprising: rack, inside is equipped with the conveying channel of conveying steel drum;

[0007] Pre-positioning station and printing station are sequentially arranged in the rack along the transmission direction of the conveying channel;

[0008] The pre-positioning clamping assembly arranged on the pre-positioning station comprises first clamping components respectively arranged on the left and right sides of the conveying channel and movable towards each other, and a first friction drive mechanism is arranged on the inner side of the first clamping components, the first friction drive mechanism comprising a first driving friction wheel set and a first driven friction wheel set, and the first driving friction wheel set is rotatable through a first driving motor arranged on the first clamping component;

[0009] The printing position clamping assembly arranged on the printing station comprises second clamping components respectively arranged on the left and right sides of the conveying channel and movable towards each other, and a second friction drive mechanism is arranged on the inner side of the second clamping components, the second friction drive mechanism comprising a second driving friction wheel set and a second driven friction wheel set, and the second driving friction wheel set is rotatable through a second driving motor arranged on the second clamping component;

[0010] The identification positioning device is arranged above the pre-positioning station and the printing station respectively, and is used for identifying the hole position on the top of the steel drum;

[0011] The flat screen printing machine is arranged above the printing station in the rack and can move up and down;

[0012] The control device is signal-connected with the pre-positioning clamping assembly, the printing position clamping assembly, the first driving motor, the second driving motor, the identification positioning device and the flat screen printing machine, and is used for controlling the cooperation of the components according to the signal of the identification positioning device.

[0013] In the above scheme, the pre-positioning clamping assembly and the printing position clamping assembly are linked and controlled by the control device, the whole process automation cooperation of the steel drum from the pre-positioning station to the printing station and finally outputting the printed steel drum is realized, the labor cost investment is greatly reduced, the hole position coordinates on the top of the steel drum are identified by the identification positioning device, the control device can dynamically adjust the rotating speed of the first friction wheel set and the second friction wheel set, the position deviation of the steel drum in the conveying process is effectively compensated, and the precision and consistency of each steel drum in the printing are ensured.

[0014] As a preferred scheme of the utility model, the first clamping component comprises first clamping frames arranged symmetrically, the two first clamping frames are distributed in an interval along the upper and lower sides of the conveying channel on the left and right sides, and the opposite end portions are arc-shaped structures matched with the outer wall of the steel drum;

[0015] The first driving friction wheel set is rotatably arranged at the arc-shaped two end portions of the first clamping frame on one side of the conveying channel, and the first driven friction wheel set is rotatably arranged at the arc-shaped two end portions of the first clamping frame on the other side of the conveying channel;

[0016] The first driving motor is fixed on the first clamping frame where the first driving friction wheel set is located and is in transmission connection with the first driving friction wheel set through a first belt;

[0017] The bottom of the first clamping frame in the lowermost layer is respectively provided with a pre-positioning slide rail assembly, and the two groups of first clamping frames on the left and right sides of the conveying channel are slidably closed in the opposite direction through the pre-positioning slide rail assemblies at the bottom of each group to clamp the steel drum, and the steel drum is driven to adjust to the pre-set position through the coordinated rotation of the first driving friction wheel set and the first driven friction wheel set.

[0018] As a preferred aspect of the utility model, the pre-positioning slide rail assembly comprises first slide rails respectively installed below the first clamping frames, the first slide rails are fixed on the pre-positioning stations on the left and right sides of the conveying channel in a direction perpendicular to the conveying direction of the steel drum, the first clamping frames are slidably installed on the corresponding first slide rails through the sliders at the bottom of each group, first driving cylinders are respectively fixed on the pre-positioning stations below the first slide rails, and the piston ends of the first driving cylinders are fixedly connected with the corresponding first clamping frames.

[0019] As a preferred aspect of the utility model, the second clamping component comprises second clamping frames symmetrically arranged, the two second clamping frames are distributed in an upper and lower interval along the left and right sides of the conveying channel, and the opposite ends are arc-shaped structures matched with the outer wall of the steel drum.

[0020] The second driving friction wheel set is horizontally rotatably installed at the arc-shaped two ends of the second clamping frame on one side of the conveying channel, and the second driven friction wheel set is horizontally rotatably installed at the arc-shaped two ends of the second clamping frame on the other side of the conveying channel.

[0021] The second driving motor is fixed on the second clamping frame where the second driving friction wheel set is located and is in transmission connection with the second driving friction wheel set through a second belt.

[0022] The bottom of the second clamping frame in the lowermost layer is respectively provided with a printing position slide rail assembly, and the two groups of second clamping frames on the left and right sides of the conveying channel are slidably closed in the opposite direction through the printing position slide rail assemblies at the bottom of each group to clamp the steel drum, and the steel drum is driven to adjust to the pre-set position through the coordinated rotation of the second driving friction wheel set and the second driven friction wheel set.

[0023] As the preferred place case of the utility model, the printing position sliding rail assembly includes the second sliding rail installed below the second clamping frame respectively, the second sliding rail is fixed on the printing station on the left and right sides of the conveying channel in the direction perpendicular to the conveying direction of the steel drum, the second clamping frame is installed on the corresponding second sliding rail through the sliding block on the bottom surface, the second driving cylinder is fixed below the second sliding rail on the printing station respectively, the piston end of the second driving cylinder is fixedly connected with the corresponding second clamping frame.

[0024] As the further place case of the utility model, the blocking mechanism is arranged at the bottom between the predetermined position station and the printing station and the exit end of the printing station respectively and can be used for blocking the steel drum conveyed through the conveying channel.

[0025] As the preferred place case of the utility model, the blocking mechanism includes the first blocking piece and the second blocking piece;

[0026] The first blocking piece is arranged at the bottom of the joint between the predetermined position station and the printing station, and the second blocking piece is arranged at the bottom of the exit end of the printing station;

[0027] The first blocking piece and the second blocking piece all include the horizontally telescopic baffle and the third driving cylinder for driving the baffle to be telescopic, the third driving cylinder is signal connected with the control device, is used for stretching out the baffle to the conveying channel direction to block the movement of the steel drum when the steel drum reaches the preset station, and is used for retracting the baffle to release after completing positioning or printing.

[0028] As the preferred place case of the utility model, the flat screen printing machine includes the ink scraping device installed above the steel drum in the printing station through the three-axis moving mechanism, and the three-axis moving mechanism includes:

[0029] The screen printing machine hanger is fixed on the inner wall of the rack, the screen printing machine driving motor with the output end connected with the lead screw is installed on the back of the screen printing machine hanger, and the lead screw horizontally extends into the screen printing machine hanger;

[0030] The Z-axis guide rail is fixed on the bottom of the screen printing machine hanger in the direction of the conveying channel;

[0031] The X-axis guide rail is slidably connected on the Z-axis guide rail through the sliding block, and the X-axis guide rail is horizontally arranged along the conveying direction of the conveying channel, the lead screw drives the X-axis guide rail to move horizontally along the Z-axis guide rail through the lead screw nut fixed on the X-axis guide rail, and the Y-axis back plate vertically arranged is slidably connected on the front side of the X-axis guide rail through the sliding block;

[0032] A Y-axis guide rail is vertically fixed on the Y-axis back plate, and the ink scraping device is slidably connected with the Y-axis guide rail through a sliding block; a fourth driving air cylinder is fixed on the Y-axis back plate, and an output end of the fourth driving air cylinder extends vertically downward and is connected with the ink scraping device to drive the ink scraping device to approach or move away from the top of the steel drum;

[0033] The three-axis moving mechanism is connected with the control device, the silk screen printing machine driving motor drives the ink scraping device to complete X / Y / Z three-axis positioning, and the fourth driving air cylinder drives the ink scraping device to perform vertical lifting action to adjust the ink scraping pressure or separate from the printing surface.

[0034] As a preferred embodiment of the utility model, the flat screen printing machine further comprises:

[0035] A plate guide rail is vertically fixed on the inner wall of the frame;

[0036] A plate frame is slidably connected with the plate guide rail through a sliding block;

[0037] A fifth driving air cylinder is fixed on the inner wall of the frame, and an output end of the fifth driving air cylinder is connected with the back of the plate frame and connected with the control device;

[0038] A screen frame clamping seat is symmetrically arranged on the front side of the plate frame, and the end of the screen frame clamping seat can be horizontally extended to the front and rear sides of the ink scraping device;

[0039] Quick-release clamping jaws are arranged on the screen frame clamping seats;

[0040] A screen frame is detachably mounted between the two screen frame clamping seats through the quick-release clamping jaws, a silk screen is fixed on the bottom of the screen frame, and the main scraper and the ink returning blade of the ink scraping device are located directly above the silk screen.

[0041] As a further embodiment of the utility model, an installation plate extending to the inlet direction of the conveying channel is arranged on the first clamping frame, a horizontally rotatable extrusion separating wheel is arranged on the installation plate, and the wheel surface of the extrusion separating wheel is flush with the wheel surfaces of the first driving friction wheel set and the first driven friction wheel set.

[0042] In summary, the utility model has the beneficial effects that: the utility model constructs a double-station cooperative structure of a pre-positioning station and a printing station in the frame, and is matched with a corresponding control device, so that full-process automatic barrel surface screen printing on the top of the steel drum is realized.

[0043] Wherein, when the steel drum enters the pre-positioning station, the clamping assembly is quickly closed by means of the slide rail, and the friction wheel set is driven to rotate. In this process, the steel drum is preliminarily adjusted in the circumferential angle according to the data identified by the identification positioning device, and when the steel drum enters the printing station, the steel drum is finely adjusted again according to the data identified by the identification positioning device, so that the top hole of the steel drum can be accurately aligned, thereby ensuring the accuracy and consistency of printing of each steel drum.

[0044] In addition, the blocking mechanism of the synchronous linkage control plays a key role, which can effectively separate the working intervals of adjacent stations, avoiding the queue interference phenomenon of the steel drum in the conveying process. The printing station adopts a three-axis driven plane screen printing machine, which can not only accurately track the position of the steel drum in the horizontal direction, but also realize the lifting in the vertical direction through air pressure driving, so as to accurately control the scraper pressure. Moreover, cooperating with the quick-release clamping jaw, the quick replacement of the multi-specification screen frame can be realized, and the adjustable positioning of the screen frame can also be realized. These characteristics significantly improve the consistency of complex pattern printing.

[0045] The utility model discloses a control device to the action time sequence and parameter matching of each execution unit are overall planned management, reduce the degree of manual intervention, and greatly improve the stability of production rhythm and the qualified rate of product. Especially in the large batch, many kinds of steel drum printing scene, has shown the outstanding applicability and advantage. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 It is one of the perspective views of the utility model.

[0047] Figure 2 It is the second cross-sectional view of the utility model.

[0048] Figure 3 It is the overhead structure schematic view of the utility model.

[0049] Figure 4 It is the side view structure schematic view of the utility model, and the enlarged view of the local area in the figure.

[0050] Figure 5 It is the structure schematic view of the pre-positioning clamping assembly and the printing position clamping assembly in the rack in the utility model.

[0051] Figure 6 It is the structure schematic view of the pre-positioning clamping assembly alone in the rack in the utility model, and the enlarged view of the local area in the figure.

[0052] Figure 7 It is the first driving friction wheel set and the first driving motor connection structure schematic view in the first friction driving mechanism of the utility model.

[0053] Figure 8 It is the connection structure schematic view of first clamping frame and first drive cylinder in first friction drive mechanism of the utility model.

[0054] Figure 9 It is the structure schematic view that printing position clamping subassembly is alone in rack of the utility model.

[0055] Figure 10 It is the connection structure schematic view of second clamping frame and second drive cylinder in second friction drive mechanism of the utility model.

[0056] Figure 11 It is the connection structure schematic view of second clamping frame and second drive cylinder in second friction drive mechanism of the utility model.

[0057] Figure 12 It is the structure schematic view of blocking mechanism in rack of the utility model.

[0058] Figure 13 It is the structure schematic view of first blocking piece and second blocking piece in the utility model.

[0059] Figure 14 It is the structure schematic view that plane silk screen printing machine is installed on the inner wall of rack in printing position through printing movement mechanism in the utility model.

[0060] Figure 15 It is the structure schematic view that plane silk screen printing machine is installed on the inner wall of rack in printing position through printing movement mechanism in the utility model.

[0061] Explanation of reference numerals: 1, frame; 2, plate frame; 3, pre-positioning clamping assembly; 4, first friction drive mechanism; 5, printing position clamping assembly; 6, second friction drive mechanism; 7, flat screen printing machine; 8, control device; 9, pre-positioning slide rail assembly; 10, conveying channel; 11, printing position slide rail assembly; 12, X-axis guide rail; 13, Y-axis guide rail; 14, Z-axis guide rail; 15, screen printing machine drive motor; 16, screen printing machine hanger; 18, fourth drive cylinder; 19, Y-axis back plate; 20, fifth drive cylinder; 21, screen frame clamping seat; 22, quick-release clamping jaw; 23, screen frame; 24, plate guide rail; 25, screen plate; 31, first clamping part; 32, first clamping frame; 33, mounting plate; 34, extrusion separation wheel; 41, first driving friction wheel set; 42, first drive motor; 43, first driven friction wheel set; 44, first belt; 51, second clamping part; 52, second clamping frame; 61, second driving friction wheel set; 62, second drive motor; 63, second driven friction wheel set; 64, second belt; 71, ink scraping device; 72, main doctor blade; 73, ink return blade; 74, alternate cylinder; 81, connecting arm; 82, control main machine; 83, display screen; 84, operation button; 91, first slide rail; 92, first drive cylinder; 100, pre-positioning station; 101, bottom plate; 111, second slide rail; 112, second drive cylinder; 121, ink scraping motor; 151, lead screw; 200, printing station; 300, blocking mechanism; 301, first blocking piece; 302, second blocking piece; 304, third drive cylinder. DETAILED DESCRIPTION

[0062] The following detailed description provides various different embodiments or examples for implementing the present application. Of course, these are merely examples and are not intended to be limiting. Additionally, like reference numerals can be used to denote like elements throughout the various examples and figures. These repeated use of reference numerals indicates that the referenced elements have the same function in the different embodiments and / or examples described herein.

[0063] Moreover, words related to spatial relationships, such as "below", "lower", "from left to right", "above", "upper", and the like, can be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the drawings. These spatially relative terms are intended to encompass different orientations of the device in use or operation, as well as different orientations of the device in the drawings. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", etc., are used herein only to describe one element or feature from another, and do not imply a relative importance or a specific number of elements or features so described. Thus, a feature defined with "first" or "second" can include one or more of either feature.

[0064] The utility model is further described below in combination with the drawings and specific embodiments: the embodiment provides a kind of automatic barrel surface silk printing equipment for steel drum top, realizes full-automatic printing by double-station dynamic deviation correction and three-axis precision positioning. Figures 1 to 15 As shown in the drawings, it comprises a rack 1 arranged across the steel drum conveying line, a conveying passage 10 is formed in the rack 1 for the conveying line to pass through. The conveying passage 10 is provided with a bottom plate 101 on both sides. A pre-positioning station 100 and a printing station 200 are arranged in sequence on the bottom plate 101 on both sides of the rack 1 along the conveying direction of the conveying passage 10. The steel drum passes through the pre-positioning station 100 and the printing station 200 in sequence along the conveying passage 10. The bottom plate 101 on one side of the joint between the pre-positioning station 100 and the printing station 200 and the bottom plate 101 on one side close to the outlet of the printing station 200 are respectively provided with a blocking mechanism 300. The blocking mechanism 300 comprises two third driving cylinders 304 arranged at intervals on the bottom plate 101 on one side. The output ends of the two third driving cylinders 304 are respectively connected with a first blocking piece 301 and a second blocking piece 302 which can extend into the transmission path of the conveying passage 10. The end portions of the first blocking piece 301 and the second blocking piece 302 are triangular so as to be inserted between the steel drums on the conveying line. The pre-positioning station 100 and the printing station 200 are respectively provided with a pre-positioning clamping assembly 3 and a printing station clamping assembly 5 which can clamp the steel drum to rotate in place. The rack 1 is provided with a control device 8. In the embodiment, the control device 8 comprises a control host 82 fixed to the rack 1 by a connecting arm 81. The control host 82 is provided with a display screen 83 and operation buttons 84.

[0065] As shown in the drawings, Figures 1 to 8As shown, the pre-positioning clamping assembly 3 on the pre-positioning station 100 comprises first clamping frames 32 symmetrically distributed on the left and right sides of the conveying channel 10. The two first clamping frames 32 are arranged in an upper and lower staggered manner on the left and right sides of the conveying channel 10 to form a first clamping component 31 that can move towards each other. The opposite ends of the two first clamping frames 32 are arc-shaped structures that are adapted to the outer wall of the steel drum. The bottom of the lowermost first clamping frame 32 is provided with a pre-positioning slide rail assembly 9. The pre-positioning slide rail assembly 9 comprises a first slide rail 91 perpendicular to the conveying direction of the steel drum. The first slide rail 91 is fixed on the bottom plate 101 on the left and right sides of the conveying channel 10. The two first clamping frames 32 are connected to the first slide rail 91 through the bottom sliding block. The bottom plate 101 below each first slide rail 91 is fixed with a first drive cylinder 92. The piston end of the first drive cylinder 92 is connected with the corresponding first clamping frame 32 for driving the first clamping frames 32 on the left and right sides of the conveying channel 10 to fold or separate, thereby clamping the steel drum entering the pre-positioning station 100.

[0066] The arc-shaped ends of the first clamping frames 32 on the left and right sides of the conveying channel 10 in the present embodiment are respectively provided with a first friction drive mechanism 4 for initially rotating the steel drum clamped by the first clamping frame 32 in place. Specifically, the arc-shaped ends of the first clamping frame 32 on one side of the conveying channel 10 are horizontally rotatably installed with a first driving friction wheel set 41, and the arc-shaped ends of the first clamping frame 32 on the other side are horizontally rotatably installed with a first driven friction wheel set 43. The first clamping frame 32 on which the first driving friction wheel set 41 is located is fixed with a first drive motor 42. The first drive motor 42 is in transmission connection with the first driving friction wheel set 41 through a first belt 44. Through the coordinated rotation of the first driving friction wheel set 41 and the first driven friction wheel set 43, the steel drum is adjusted to a preset positioning state. It should be noted that in order to adjust each steel drum to the same positioning state, an identification positioning device (not shown in the figure) for identifying the hole position of the top of the steel drum is arranged above the pre-positioning station 100 and the printing station 200. The identification positioning device can adopt a position sensor or a high-resolution industrial camera cooperating with a ring-shaped illumination light source to detect the position of the large hole and the small hole on the top of the steel drum to correct the state of the steel drum. The identification positioning device is connected with the control device 8 in signal connection. After comparison and calculation by the pre-set program in the control device 8, the first drive motor 42 is driven to work to rotate the steel drum.

[0067] In order to enable the steel drums arranged and conveyed on the conveying belt to enter the pre-positioning station 100 one by one in order, the first clamping frame 32 is further provided with a mounting plate 33 extending towards the inlet direction of the conveying channel 10. The end of the mounting plate 33 is provided with a horizontally rotatable extrusion separation wheel 34. The wheel surface of the extrusion separation wheel 34 is flush with the wheel surface of the first driving friction wheel set 41 and the first driven friction wheel set 43, which is used to separate the extruded and stacked steel drums.

[0068] In addition, as shown in Figures 1 to 5 and Figures 9 to 11 the printing position clamping assembly 5 of the printing station 200 is basically the same as the pre-positioning clamping assembly 3 in structure, specifically, the printing position clamping assembly 5 is mirror-symmetrical with the pre-positioning clamping assembly 3. It includes the second clamping part 51 which is composed of the second clamping frames 52 symmetrically arranged on both sides of the conveying channel 10, and the second clamping frames 52 are slidingly connected to the two bottom plates 101 through the printing position slide rail assemblies 11 on the bottom of each second clamping frame 52. The printing position slide rail assembly 11 includes the second slide rails 111 which are perpendicular to the conveying direction and are respectively fixed on the bottom plates 101 on the left and right sides of the conveying channel 10; the second clamping frames 52 are connected to the corresponding second slide rails 111 through the sliding blocks on the bottom surface. The second drive cylinders 112 are fixed on the bottom of the bottom plate 101 below the second slide rails 111, and the piston end of the second drive cylinders 112 is fixedly connected to the corresponding second clamping frame 52, so as to drive the second clamping frames 52 on the left and right sides of the conveying channel 10 to move towards each other or separate, thereby clamping the steel drum entering the printing station 200. The arc-shaped end of the second clamping frame 52 is provided with the second friction drive mechanism 6 for rotating and adjusting the steel drum clamped by the second clamping frame 52 again. The second friction drive mechanism 6 includes the second driving friction wheel set 61, the second driven friction wheel set 63 and the second drive motor 62 which is driven by the second belt 64, and the installation position and transmission relationship are completely consistent with those of the first friction drive mechanism 4 on the first clamping frame 32. For details, please refer to the structural embodiment of the first friction drive mechanism 4.

[0069] In addition, as shown in Figure 4 and Figure 14 and Figure 15The embodiment of the flat screen printing machine 7 is shown, which comprises a squeegee device 71 installed above the steel drum in the printing station 200 by a three-axis moving mechanism, and a screen frame 23 for carrying a screen printing pattern screen 25 which is movably arranged on the inner wall of the rack 1, wherein the three-axis moving mechanism comprises: a screen printing machine hanger 16 fixed on the inner wall of the rack 1, the back of which is provided with a screen printing machine driving motor 15, and the output end of the screen printing machine driving motor 15 is connected with a lead screw 151 horizontally extending into the inside of the screen printing machine hanger 16. The bottom of the screen printing machine hanger 16 is fixed with a Z-axis guide rail 14 horizontally extending towards the conveying channel 10, and an X-axis guide rail 12 is slidably connected to the Z-axis guide rail 14, the X-axis guide rail 12 is horizontally arranged along the conveying direction of the conveying channel 10, and the lead screw 151 drives the X-axis guide rail 12 to move along the Z-axis guide rail 14 through the lead screw nut fixed on the X-axis guide rail 12; the front side of the X-axis guide rail 12 is slidably connected with a vertically arranged Y-axis back plate 19, and the X-axis guide rail 12 is provided with a squeegee motor 121 driving the Y-axis back plate 19 to move horizontally along the X-axis guide rail 12 reciprocally; the front side of the Y-axis back plate 19 is vertically fixed with a Y-axis guide rail 13, and the squeegee device 71 is slidably connected with the Y-axis guide rail 13 through a sliding block, and the fourth driving cylinder 18 is fixed on the Y-axis back plate 19, and the output end of the fourth driving cylinder 18 is connected with the squeegee device 71 vertically downward, so as to realize the Y-axis direction movement of the squeegee device 71. The inner wall of the rack 1 is vertically fixed with a printing plate guide rail 24, and the printing plate guide rail 24 is provided with a printing plate rack 2 movably arranged thereon through a sliding block. The fifth driving cylinder 20 is fixed on the inner wall of the rack 1, and the output end of the fifth driving cylinder 20 is connected with the back of the printing plate rack 2, so as to drive the printing plate rack 2 to move up and down along the printing plate guide rail 24. The front side of the printing plate rack 2 is symmetrically provided with screen frame clamping seats 21, the screen frame clamping seats 21 extend horizontally to the front and back sides of the squeegee device 71, and quick-release clamping jaws 22 are arranged on each screen frame clamping seat 21; the screen frame 23 is detachably arranged between the two screen frame clamping seats 21 through the quick-release clamping jaws 22. The screen 25 is fixed on the bottom of the screen frame 23. The squeegee device 71 comprises a main squeegee 72 and a ink returning blade 73, and the main squeegee 72 and the ink returning blade 73 are fixed with the fourth driving cylinder 18 and the sliding block slidably connected with the Y-axis guide rail 13 through an alternating cylinder 74. The screen 25 is moved downward to the top surface of the steel drum by the fifth driving cylinder 20, and is located directly below the main squeegee 72 and the ink returning blade 73 of the squeegee device 71.

[0070] The utility model discloses a working principle as follows: preposition stage: when the steel drum enters preposition station 100, the third drive cylinder 304 of first blocking piece 301 pushes the baffle 303 and extends, and intercepts the steel drum, and the control device 8 starts the first drive cylinder 92, and drives both sides first clamping frame 32 along the first slide rail 91 and converges, and the first driving friction wheel group 41 and first driven friction wheel group 43 contact the outer wall of steel drum, and the identification positioning device on preposition station 100 scans the hole position on the top of steel drum, and after the control device 8 calculates the angle deviation, first drive motor 42 drives first driving friction wheel group 41 to rotate through first belt 44, and drives the circumferential rotation of steel drum, and first driven friction wheel group 43 follows the cooperation, and after completing the coarse adjustment, first drive cylinder 92 resets and loosens the steel drum, and the baffle 303 of first blocking piece 301 is retracted, and the steel drum enters printing station 200 along with the conveying line.

[0071] Printing stage: the steel drum entering printing station 200 is intercepted by the baffle 303 of second blocking piece 302 extension, and second drive cylinder 112 drives second clamping frame 52 and converges and clamps the steel drum, and the identification positioning device on printing station 200 scans the hole position secondly, and the control device 8 controls second drive motor 62 and drives second driving friction wheel group 61 and fine adjusts the position of steel drum, and silk screen printing machine drive motor 15 starts, and moves to the upper of steel drum through lead screw 151 drive X axle guide rail 12 along Z axle guide rail 14, and Y axle backboard 19 slides along X axle guide rail 12 and accurately positions, and fourth drive cylinder 18 presses down ink scraping device 71, and alternating cylinder 74 presses down main doctor blade 72 and makes it contact silk screen 25, and scraping motor 121 drives main doctor blade 72 and moves along X axle guide rail 12 unidirectionally and completes scraping, and simultaneously the control device 8 dynamically adjusts the rotating speed of second friction wheel group according to real-time position data, and compensates the displacement of steel drum, and after printing, alternating cylinder 74 lifts main doctor blade 72 and makes it leave silk screen 25, then presses down ink return blade 73 and makes it contact silk screen 25, and scraping motor 121 drives ink return blade 73 and moves along X axle guide rail 12 reversely and completes ink return, and after the ink return process is completed, fourth drive cylinder 18 lifts ink scraping device 71, and second drive cylinder 112 loosens the steel drum, and the baffle 303 of second blocking piece 302 is retracted and releases.

[0072] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and the person skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification only illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic drum face silk screen printing apparatus for a steel drum top, characterized by, The utility model relates to a steel drum printing and positioning device, which comprises the following: a rack (1) internally provided with a conveying channel (10) for conveying steel drums; a pre-positioning station (100) and a printing station (200) arranged in sequence in the rack (1) along the conveying direction of the conveying channel (10); a pre-positioning clamping assembly (3) arranged on the pre-positioning station (100) and comprising first clamping components (31) symmetrically arranged on the left and right sides of the conveying channel (10) and movable towards each other, the inner side of the first clamping components (31) being provided with a first friction drive mechanism (4) comprising a first driving friction wheel set (41) and a first driven friction wheel set (43), the first driving friction wheel set (41) being rotatable through a first driving motor (42) arranged on the first clamping component (31); a printing station clamping assembly (5) arranged on the printing station (200) and comprising second clamping components (51) symmetrically arranged on the left and right sides of the conveying channel (10) and movable towards each other, the inner side of the second clamping components (51) being provided with a second friction drive mechanism (6) comprising a second driving friction wheel set (61) and a second driven friction wheel set (63), the second driving friction wheel set (61) being rotatable through a second driving motor (62) arranged on the second clamping component (51); a recognition positioning device arranged above the pre-positioning station (100) and the printing station (200) respectively and used for recognizing the hole position on the top of the steel drum; a flat screen printing machine (7) arranged above the printing station (200) in the rack (1) and movable up and down; a control device (8) in signal connection with the pre-positioning clamping assembly (3), the printing station clamping assembly (5), the first driving motor (42), the second driving motor (62), the recognition positioning device and the flat screen printing machine (7) and used for controlling the cooperation of the assemblies according to the signal of the recognition positioning device.

2. The automatic barrel face silk printing apparatus for a steel drum top according to claim 1, characterized by, The first clamping component (31) comprises first clamping frames (32) symmetrically arranged, the two first clamping frames (32) being distributed in an interval along the upper and lower sides of the conveying channel (10) on the left and right sides respectively, and the opposite ends being arc-shaped structures matched with the outer wall of the steel drum; the first driving friction wheel set (41) is rotatable horizontally and arranged at the arc-shaped two ends of the first clamping frame (32) on one side of the conveying channel (10), and the first driven friction wheel set (43) is rotatable horizontally and arranged at the arc-shaped two ends of the first clamping frame (32) on the other side of the conveying channel (10); the first driving motor (42) is fixed on the first clamping frame (32) where the first driving friction wheel set (41) is arranged and in transmission connection with the first driving friction wheel set (41) through a first belt (44). The first clamping frame (32) at the bottom layer is respectively provided with a pre-positioning slide rail assembly (9), and the two groups of first clamping frames (32) on the left and right sides of the conveying channel (10) are folded in the opposite direction through the pre-positioning slide rail assemblies (9) at the bottom of each group to clamp the steel drum, and the steel drum is driven to adjust to the preset position through the coordinated rotation of the first driving friction wheel group (41) and the first driven friction wheel group (63).

3. The automatic barrel face silk printing apparatus for a steel drum top according to claim 2, characterized by, The pre-positioning slide rail assembly (9) comprises a first slide rail (91) installed below the first clamping frame (32), the first slide rail (91) is fixed on the pre-positioning workstations (100) on the left and right sides of the conveying channel (10) in a direction perpendicular to the conveying direction of the steel drum, the first clamping frame (32) is slidably installed on the corresponding first slide rail (91) through the slider at the bottom of each group, and the pre-positioning workstations (100) below the first slide rails (91) are respectively fixed with first driving cylinders (92), and the piston end of the first driving cylinder (92) is fixedly connected with the corresponding first clamping frame (32).

4. The automatic barrel face silk printing apparatus for a steel drum top according to claim 2, characterized by, The second clamping component (51) comprises symmetrically arranged second clamping frames (52), the two second clamping frames (52) are respectively distributed on the left and right sides of the conveying channel (10) in an up-down interval, and the opposite ends are arc-shaped structures matched with the outer wall of the steel drum. The second driving friction wheel group (61) is horizontally rotatably installed at the arc-shaped two end portions of the second clamping frame (52) on one side of the conveying channel (10), and the second driven friction wheel group (63) is horizontally rotatably installed at the arc-shaped two end portions of the second clamping frame (52) on the other side of the conveying channel (10). The second driving motor (62) is fixed on the second clamping frame (52) where the second driving friction wheel group (61) is located, and is drivingly connected with the second driving friction wheel group (61) through the second belt (64). The second clamping frame (52) at the bottom layer is respectively provided with a printing position slide rail assembly (11), and the two groups of second clamping frames (52) on the left and right sides of the conveying channel (10) are folded in the opposite direction through the printing position slide rail assemblies (11) at the bottom of each group to clamp the steel drum, and the steel drum is driven to adjust to the preset position through the coordinated rotation of the second driving friction wheel group (61) and the second driven friction wheel group (63).

5. The automatic barrel face silk printing apparatus for a steel drum top according to claim 4, characterized by, The printing position slide rail assembly (11) comprises a second slide rail (111) installed below the second clamping frame (52), the second slide rail (111) is fixed on the printing workstations (200) on the left and right sides of the conveying channel (10) in a direction perpendicular to the conveying direction of the steel drum, the second clamping frame (52) is installed on the corresponding second slide rail (111) through the slider on the bottom surface of each group, and the printing workstations (200) below the second slide rails (111) are respectively fixed with second driving cylinders (112), and the piston end of the second driving cylinder (112) is fixedly connected with the corresponding second clamping frame (52).

6. The automatic barrel face silk-screen printing apparatus for a steel drum top according to claim 1, characterized by A blocking mechanism (300) is arranged at the bottom between the pre-positioning station (100) and the printing station (200) and the bottom of the exit of the printing station (200) to block the steel drum transported through the conveying channel (10).

7. The automatic barrel face silk screening apparatus for a steel drum top as claimed in claim 6, wherein The blocking mechanism (300) comprises a first blocking member (301) and a second blocking member (302); The first blocking member (301) is arranged at the bottom of the joint between the pre-positioning station (100) and the printing station (200), and the second blocking member (302) is arranged at the bottom of the exit of the printing station (200); Both the first blocking member (301) and the second blocking member (302) comprise a horizontally retractable baffle (303) and a third drive cylinder (304) for driving the baffle (303) to retract, and the third drive cylinder (304) is signal connected with the control device (8) to extend the baffle (303) to the conveying channel (10) to block the movement of the steel drum when the steel drum reaches the pre-set station, and retract the baffle (303) to release after positioning or printing is completed.

8. The automatic barrel face silk printing apparatus for a steel drum top according to claim 2 or 3, characterized in that, The flat screen printing machine (7) comprises a squeegee device (71) installed above the steel drum in the printing station (200) through a three-axis moving mechanism, and the three-axis moving mechanism comprises: A screen printing machine hanger (16) is fixed to the inner wall of the rack (1), and a screen printing machine drive motor (15) with an output end connected to a lead screw (151) is installed at the back of the screen printing machine hanger (16), and the lead screw (151) horizontally extends into the interior of the screen printing machine hanger (16); A Z-axis guide rail (14) is fixed to the bottom of the screen printing machine hanger (16) and horizontally extends towards the conveying channel (10); An X-axis guide rail (12) is slidably connected to the Z-axis guide rail (14) and is horizontally arranged along the conveying direction of the conveying channel (10), and the lead screw (151) drives the X-axis guide rail (12) to horizontally move along the Z-axis guide rail (14) through a lead screw nut fixed to the X-axis guide rail (12), and a vertically arranged Y-axis back plate (19) is slidably connected to the front side of the X-axis guide rail (12) through a sliding block; A Y-axis guide rail (13) is vertically fixed to the Y-axis back plate (19), the squeegee device (71) is slidably connected to the Y-axis guide rail (13) through a sliding block, and a fourth drive cylinder (18) is fixed to the Y-axis back plate (19), the output end of the fourth drive cylinder (18) vertically extends downward and is connected to the squeegee device (71) to drive the squeegee device (71) to approach or move away from the top of the steel drum.

9. The automatic barrel face silk printing apparatus for a steel drum top according to claim 8, characterized by, The flat screen printing machine (7) further comprises: A plate guide rail (24) is vertically fixed to the inner wall of the rack (1); A plate rack (2) is slidably connected to the plate guide rail (24) through a sliding block; A fifth drive cylinder (20) is fixed to the inner wall of the rack (1), the output end of the fifth drive cylinder (20) is connected to the back of the plate rack (2), and the fifth drive cylinder (20) is signal connected with the control device (8); A screen frame clamping seat (21) is symmetrically arranged on the front side of the plate frame (2), and the end of the screen frame clamping seat (21) can extend horizontally to the front and rear sides of the ink scraping device (71) respectively. A quick-release clamping jaw (22) is arranged on the screen frame clamping seat (21) respectively. A screen frame (23) is detachably mounted between the two screen frame clamping seats (21) through the quick-release clamping jaw (22), and the screen frame (23) is fixed with a silk screen (25) at the bottom, and the main scraper and the ink return blade of the ink scraping device (71) are located directly above the silk screen (25).

10. The automatic barrel face silk-screen printing apparatus for a steel drum top according to claim 2, characterized by, A mounting plate (33) extending to the inlet direction of the conveying channel (10) is arranged on the first clamping frame (32), and a horizontally rotatable extrusion separation wheel (34) is arranged on the mounting plate (33), and the wheel surface of the extrusion separation wheel (34) is flush with the wheel surface of the first driving friction wheel set (41) and the first driven friction wheel set (43).

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