High-speed platform screen printing machine

Abstract

The present invention discloses a high-speed platform screen printing machine, comprising a printing frame, a printing device and a power device, and also comprising a vertically arranged printing platform assembly, wherein the printing platform assembly comprises a rotating shaft and at least three platforms arranged around the rotating shaft, wherein the at least three platforms are arranged parallel to the rotating shaft; the rotating shaft and the printing device are connected to the power device and driven by the power device; the printing device is suspended above the printing platform assembly and is on the same vertical line as the rotating shaft; the position below the printing device is a printing station. The present invention fixes and combines multiple platforms in a rotating manner, adopts a vertically arranged printing platform assembly, and integrates and synchronizes the three main process steps of material discharge, printing and material retrieval, thereby greatly shortening the process cycle and improving printing efficiency. In addition, the rational layout of the loading station, printing station and unloading station is continuous and compact, without interfering with each other, and the independent operation process is clear and easy to control.

Description

Technical Field

[0001] The present invention relates to the field of printing technology, in particular to a high-speed platform screen printing machine. Background Art

[0002] At present, the printing speed of flatbed screen printing machines is always a shortcoming compared with other major printing methods (lithographic gravure and relief printing) in the flatbed single-sheet printing process. This is mainly due to the limitations of its process steps. Usually, material unloading, printing and material removal need to be carried out step by step according to the procedure. The time period is determined by the sum of the time of each step, which makes it difficult to increase the printing speed in a unit time period. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-speed platform screen printing machine with short process cycle and high efficiency.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0005] A high-speed platform screen printing machine includes a printing frame, a printing device and a power device, and also includes a vertically arranged printing platform assembly, the printing platform assembly includes a rotating shaft and at least three platforms arranged around the rotating shaft, at least three platforms are arranged parallel to the rotating shaft; the rotating shaft and the printing device are connected to the power device and driven by the power device; the printing device is suspended above the printing platform assembly and is on the same vertical line as the rotating shaft; the position below the printing device is a printing station.

[0006] Furthermore, the printing platform assembly includes six platforms, and the six platforms are connected end to end in sequence to form a hexagon.

[0007] Furthermore, a substrate positioning device is provided on the platform, and the substrate positioning device includes an X-axis positioning column and a Y-axis positioning column, wherein the X-axis positioning column is fixedly provided on the lower edge of the platform, and the Y-axis positioning column is fixedly provided on a side edge of the platform.

[0008] Furthermore, a plurality of air suction microholes are provided on the platform.

[0009] Furthermore, if the rotation direction of the rotating shaft is backward, the station before the printing station is the loading station, and the station after the printing station is the unloading station.

[0010] Furthermore, it also includes a vacuum adsorption device for detachably fixing the printing substrate on the platform.

[0011] Furthermore, the vacuum adsorption device includes a fixed disk and a rotating disk that are interlocked with each other, and the fixed disk and the rotating disk are rotatably connected together.

[0012] Furthermore, the fixed plate is provided with three independent vacuum chambers at the printing station, loading station and unloading station respectively, and the three vacuum chambers are all connected to the vacuum pump pipeline; the rotating plate is provided with multiple vacuum interfaces for communicating with the vacuum chambers, and the multiple vacuum interfaces are respectively connected to the multiple platform pipelines.

[0013] Furthermore, the printing device includes a screen frame clamp, a printing screen, a lifting mechanism and a printing scraper, wherein the printing screen is fixedly mounted on the screen frame clamp, and the printing scraper is fixedly mounted on the lifting mechanism.

[0014] Furthermore, it also includes a platform positioning device, which includes a positioning rod, a positioning sleeve and a positioning cylinder that are adapted to each other, wherein the positioning rod is fixedly mounted on the screen frame clamp, the positioning sleeve is opened on the platform, and the output end of the positioning cylinder is fixedly connected to the screen frame clamp and / or the platform.

[0015] Beneficial effects of the present invention:

[0016] At present, flat-bed screen printing, as a mobile multi-platform, is softly connected to each other and is driven by chains and synchronous belts. The platforms are relatively far apart from each other, and the conversion time of each station is correspondingly long. However, the present invention fixes the multi-platform in a seamless head-to-tail rotation manner, and adopts a vertically arranged printing platform assembly to integrate and synchronize the three main process steps of material discharge, printing and material retrieval. That is, the time consumed by the three steps is combined into the time consumed by the one step, which greatly shortens the process cycle and improves printing efficiency. In addition, the rational layout of the loading station, printing station and unloading station is continuous and compact, without interfering with each other, and the operation process is independent, clear and easy to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view of a high-speed platform screen printing machine according to a preferred embodiment of the present invention;

[0018] Figure 2 It is a front view of a preferred embodiment of the lifting mechanism of the present invention;

[0019] Figure 3 This is a schematic diagram of the lifting roller in use in a preferred embodiment of the present invention;

[0020] Figure 4 A front view of a platform of the present invention in a preferred embodiment;

[0021] Figure 5 A front view of a preferred embodiment of the vacuum adsorption device of the present invention;

[0022] Figure 6 is a side sectional view of a vacuum adsorption device of the present invention in a preferred embodiment;

[0023] Figure 7 It is a side sectional view of a platform positioning device of the present invention in a preferred embodiment.

[0024] Reference numerals include:

[0025] 200—Printing device 210—Frame clamp 220—Printing screen

[0026] 230 - lifting mechanism 231 - lifting trough frame 232 - groove

[0027] 2321—Guide slot 2322—Lifting slot 233—Lifting roller

[0028] 240—Printing scraper 300—Printing platform assembly 310—Platform

[0029] 320—rotating axis 360—air suction microholes 500—vacuum adsorption device

[0030] 510—fixed disk 511—vacuum chamber 520—rotating disk

[0031] 521—Vacuum interface 530—Vacuum pipeline 600—Platform positioning device

[0032] 610—Positioning rod 620—Positioning sleeve 630—Positioning cylinder

[0033] 640—Guide sleeve 650—Positioning wheel 710—Printing station

[0034] 720—Loading station 730—Unloading station 800—Substrate positioning device

[0035] 810—X-axis positioning column 820—Y-axis positioning column 900—Substrate DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] Please refer to Figure 1, which is a preferred embodiment of the present invention, the high-speed platform screen printing machine includes a printing frame (not shown in the figure), a printing device 200 and a power device (not shown in the figure), and also includes a vertically arranged printing platform assembly 300, the printing platform assembly 300 includes a rotating shaft 320, and at least three platforms 310 arranged around the rotating shaft 320, at least three platforms 330 are arranged parallel to the rotating shaft 320; the rotating shaft 320 and the printing device 200 are connected to the power device and driven by the power device; the printing device 200 is suspended above the printing platform assembly 300 and is on the same vertical line as the rotating shaft 320; the position below the printing device 200 is a printing station 710.

[0038] Currently, flatbed screen printing utilizes multiple mobile platforms that are all flexibly connected to each other, with transmission via chains and synchronous belts. However, the present invention utilizes a rotating fixed assembly of multiple platforms 310, employing a vertically positioned printing platform assembly 300 to integrate and synchronize the three primary process steps of unloading, printing, and retrieving. This effectively reduces the time required for these three steps into a single one, significantly shortening the process cycle and improving printing efficiency. Furthermore, the loading station 720, printing station 710, and unloading station 730 are logically arranged, continuous and compact, without interfering with each other, and the operating procedures are clearly defined and easily controlled. Each of these components is described in further detail below.

[0039] In a preferred embodiment of the present application, Figure 1 As shown, the high-speed platform screen printing machine includes a printing frame (not shown in the figure), a printing device 200, a printing platform assembly 300, a power device (not shown in the figure), a vacuum adsorption device 500, a platform positioning device 600 and a substrate positioning device 800.

[0040] The printing frame is primarily used to secure the printing device 200, printing platform assembly 300, power unit (not shown), vacuum adsorption device 500, and other structures, thereby maintaining a fixed shape. The printing frame can employ a common frame structure in the prior art, and this application does not limit the specific structure of the printing frame.

[0041] The printing device 200 is mainly used to print ink onto the substrate 900. The printing device 200 mainly includes a screen frame clamp 210, a printing screen 220, a lifting mechanism 230 and a printing scraper 240. The printing screen 220 is fixedly mounted on the screen frame clamp 210, and the printing scraper 240 is fixed together with the screen frame clamp 210 and the printing screen 220. The lifting mechanism 230 is fixedly connected to the output end of the power device (not shown in the figure), and the lifting mechanism 230 is driven by the power device (not shown in the figure) to drive the printing scraper 240, the screen frame clamp 210 and the printing screen 220 to reciprocate in the vertical direction. It can be understood that the screen frame clamp 210, the printing screen 220, the printing scraper 240 and the power device can adopt the common structure in the prior art, so this application does not elaborate on the specific structure of the above components. Preferably, the up and down movement of the printing device 200 and the rotation of the printing platform assembly 300 are driven by the same power device. Figure 1-Figure 3 As shown, the lifting mechanism 230 includes a lifting trough frame 231, a groove 232, and a lifting roller 233. The lifting trough frame 231 is fixedly mounted on the screen frame clamp 210, specifically positioned below the screen frame clamp 210 and on one side of the printing platform assembly 300. The lifting trough frame 231 is provided with a groove 232 for the lifting roller 233 to roll through. In other words, the groove 232 is used to guide the movement path of the lifting roller 233.

[0042] The groove 232 includes a guide sub-groove 2321 and an elevating sub-groove 2322. The elevating sub-groove 2322 is arranged horizontally in a straight line. There are two guide sub-grooves 2321, one on each side of the elevating sub-groove 2322, extending from the bottom of the elevating groove frame 231 to the elevating sub-groove 2322. To facilitate guiding the elevating roller 233 to the elevating sub-groove 2322, the guide sub-groove 2321 is preferably funnel-shaped. The elevating roller 233 is mounted on the printing platform assembly 300, specifically on the platform bracket 330 between two adjacent platforms 310.

[0043] Since the lifting roller 233 is installed on the printing platform assembly 300, the lifting roller 233 can rotate around the rotating axis 320 with the platform 310 and make a circular motion. The lifting groove frame 231 moves up and down linearly along the high difference point of the groove 232 with the lifting roller 233, thereby driving the printing scraper 240, the screen frame clamp 210 and the printing screen 220 to move up and down together.

[0044] The up and down movement of the printing device 200 and the rotational movement of the printing platform assembly 300 are driven by the same power device, realizing the synthesis of rotational movement and linear movement, and having the characteristics of fast mechanical movement rhythm and high reliability.

[0045] A printing platform assembly 300 is mounted below the printing device 200. The printing platform assembly 300 is vertically arranged and includes at least three platforms 310, a rotating shaft 320, and a platform support 330. For example, in a preferred embodiment of the present application, six platforms 310 are secured together by the platform support 330, evenly arranged around the rotating shaft 320 and connected end-to-end to form a hexagon. At least three of the platforms 330 are arranged parallel to the rotating shaft 320. The rotating shaft 320 is also connected to the power unit and driven by the power unit, causing the platforms 310 to rotate around the rotating shaft 320.

[0046] The position below the printing device 200 is the printing station 710. That is, as the rotating shaft 320 rotates, the six platforms 310 will rotate to the printing station 710 in sequence. If the rotating direction of the rotating shaft 320 is backward, the station before the printing station 710 is the loading station 720, and the station after the printing station 710 is the unloading station 730. For example, Figure 1 As shown, the rotation direction of the rotating shaft 320 is counterclockwise, and the process route is set as follows: the substrate 900 to be printed enters the printing station 710 from the right side of the printing station 710, that is, the right side of the printing station 710 is the loading station 720; the printed substrate 900 comes out from the left side of the printing station 710, that is, the left side of the printing station 710 is the unloading station 730. Of course, it can be understood that the loading station 720 and the unloading station 730 can also be set in reverse.

[0047] This high-speed platform screen printer utilizes a single-sheet flatbed screen printing process. Ink and coating are applied to the surface of a printing screen 220 according to the process requirements. A printing scraper 240 is then angled through the mesh of the screen 220 to print on a substrate 900 positioned at a printing station 710.

[0048] Typically, screen printing employs a one-machine, one-screen, one-platform structure, though some also employ a one-machine, one-screen, two-platform structure. However, most platforms operate in a horizontal, one-in, one-out reciprocating motion, completing the processes of retrieving, printing, and unloading. This high-speed platform screen printing press, however, utilizes at least three platforms 310 distributed in a circular pattern. These platforms 310 intermittently rotate along the circumference of the circle, allowing each platform 310 to sequentially pass through the printing station 710, the loading station 720, and the unloading station 730. Because the loading station 720, the printing station 710, and the unloading station 730 are located in separate spaces, unloading, printing, and retrieving can be performed simultaneously, completing a single printing process, which repeats in a reciprocating cycle.

[0049] Preferably, a loading device (not shown) is provided at the loading station 720 for placing the substrate 900 on the platform 310 located at the loading station 720. The loading device can adopt a common structure in the prior art, so the specific structure of the loading device is not described in detail in this application.

[0050] like Figure 4 As shown, a substrate positioning device 800 is provided on the platform 310 for accurately positioning the substrate 900 on the platform 310. The substrate positioning device 800 includes an X-axis positioning column 810 and a Y-axis positioning column 820, wherein the X-axis positioning column 810 is provided at the bottom edge of the platform 310, and the Y-axis positioning column 820 is fixedly provided at one side edge of the platform 310.

[0051] The loading device places the printing material 900 on the platform 310 from above the X-axis positioning column 810 and the side edge where the Y-axis positioning column 820 is not installed. There are two types of X-axis positioning columns 810, namely a fixed X-axis positioning column 811 and a movable X-axis positioning column 812. Among them, the fixed X-axis positioning column 811 is fixedly installed on the platform 310, while the movable X-axis positioning column 812 is movably installed on the platform 310. Preferably, a slot 813 extending obliquely upward is provided on the lower edge of the platform 310, that is, extending from the lower edge of the platform 310 to the X-axis positioning column 810. The movable X-axis positioning column 812 is inserted into the slot 813 and moves obliquely upward or obliquely downward along the slot 813 under the drive of a power device such as a cylinder or a motor (not shown in the figure).

[0052] It is understandable that in other embodiments of the present application, the X-axis positioning column 810 may not include the fixed X-axis positioning column 811 , but may only include the movable X-axis positioning column 812 .

[0053] Based on the three-point positioning principle, at least two mobile X-axis positioning posts 812 support the printing substrate 900, which is moving downward, while simultaneously moving the printing substrate 900 toward the Y-axis positioning posts 820. To increase friction and prevent slippage between the printing substrate and the mobile X-axis positioning posts 812, the printing substrate 900's path is angled at a certain angle (0 to 70 degrees) relative to the horizontal X-axis. When the other side of the mobile X-axis positioning post 812, which supports the printing substrate 900, moves diagonally upward along the slot 813 until it contacts the Y-axis positioning post 820, the printing substrate 900 has completed three-point positioning on the X and Y axes.

[0054] Because the platform 310 of the loading station 720 is positioned at a significant inclination, the X-axis side edge of the substrate 900 (i.e., the substrate 900) is tilted downward due to its own weight in the three-point positioning principle. During the positioning process of the X-axis positioning post 810, the bottom edge of the substrate 900 is always in contact with the X-axis positioning post 810, naturally ensuring the precise positioning and stability of the bottom edge. Therefore, only the other side of the substrate 900 needs to be precisely positioned to complete the accurate positioning of the substrate 900, avoiding the common phenomenon where the positioning movement of one side affects the positioning accuracy of the other side.

[0055] Conventionally, for multi-platen printing, substrate registration is achieved by installing a separate positioning device on each platen. This has the disadvantage of making it difficult to achieve consistent positioning, resulting in low printing accuracy. While unified positioning at the printing station achieves accurate positioning, the time required for three-point positioning affects the overall printing speed. The present invention employs a unified substrate positioning device 800 at the loading station 720, achieving consistent positioning for each platen 310 while minimizing printing time (since the loading station 720 and the printing station 710 are independent and can operate simultaneously).

[0056] like Figure 4 As shown, the platform 310 is provided with a plurality of suction micro-holes 360. The high-speed platform screen printing machine further comprises a vacuum adsorption device 500, which cooperates with the suction micro-holes 360 to detachably fix the printing material 900 on the platform 310 by using negative pressure.

[0057] In the printing industry, vacuum adsorption primarily secures the printing substrate 900, preventing it from shifting and affecting print quality. This system typically consists of a vacuum pump, vacuum piping, control valves, and a vacuum adsorption platform. While fixed platforms typically have relatively simple connection methods and control systems, dynamic platforms, especially those with multiple platforms, present a more complex structure and control system.

[0058] The present invention adopts a rotary vacuum adsorption device 500 to solve the vacuum system control problem of the multi-platform 310 when it is moving or static. Figure 5 and Figure 6 As shown, the vacuum adsorption device 500 mainly includes a fixed plate 510, a rotating plate 520, a vacuum interface 521, a vacuum pump (not shown), and a vacuum pipeline 530. The fixed plate 510 and the rotating plate 520 are interlocked together, and the fixed plate 510 is fixed and stationary, while the rotating plate 520 rotates with the platform 310, so that the fixed plate 510 and the rotating plate 520 are rotatably connected together.

[0059] The fixed plate 510 has three independent vacuum chambers 511 at the printing station 710, the loading station 720, and the unloading station 730, respectively. Each of the three vacuum chambers 511 is connected to a vacuum pump pipeline via a vacuum interface 521. Vacuum interfaces 521 are provided in different areas of the fixed plate 510 (e.g., the printing station 710, the loading station 720, and the unloading station 730) to connect to a vacuum pump and a control valve (not shown).

[0060] The rotating disk 520 is provided with a plurality of vacuum ports 521 for communicating with the vacuum chamber 511 . The plurality of vacuum ports 521 are respectively connected to the plurality of platforms 310 via vacuum pipes 530 . Preferably, the vacuum pipes 530 are fixed to the platform bracket 330 .

[0061] An isolation strip 512 is provided between two adjacent vacuum chambers 511 to ensure that each vacuum chamber 511 is independent of each other and does not interfere with each other. This allows for independent vacuum extraction and opening of the printing station 710, loading station 720, and unloading station 730 according to process requirements. However, during the rotation of the printing platform assembly 300, the platform 310 at a particular station must maintain vacuum continuity. If the isolation strip 512 is too thick, the vacuum may be instantly eliminated when the platform 310 passes through this area, causing the vacuum to change. Therefore, the isolation strip 512 should be relatively narrow. This way, during high-speed rotation, it can also serve as a connection to the vacuum holding chamber, allowing the substrate 900 on the platform 310 to remain in an adsorbed state and prevent it from slipping, thereby achieving the vacuum adsorption and control functions of each platform 310.

[0062] After the loading device places the printing substrate 900 onto the platform 310 located at the loading station 720, the substrate positioning device 800 positions the printing substrate 900. The vacuum suction device 500 is then activated, and the vacuum pump communicates with the vacuum chamber 511 through a channel, generating negative pressure. The suction micropores 360 distributed throughout the surface of the platform 310 firmly absorb and secure the bottom surface of the printing substrate 900. The platform 310 then rotates the printing substrate 900 into the printing station 710. As the platform 310 moves the printing substrate 900 from the loading station 720 to the printing station 710, the lifting mechanism 230 lowers the printing blade 240 to print on the printing substrate 900. After printing, the lifting mechanism 230 drives the printing scraper 240 to lift up, and at the same time the platform 310 drives the substrate 900 to rotate into the unloading station 730 (each turning angle is 60 degrees). The vacuum adsorption is released and the substrate 900 is detached from the inclined platform 310, and slides freely downward to complete the unloading.

[0063] Preferably, the up and down movement of the printing device 200 and the rotation of the printing platform assembly 300 are driven by the same power device, realizing the synthesis of rotation and linear motion, and having the characteristics of fast mechanical movement rhythm and high reliability.

[0064] Overprinting refers to the repeated printing of more than two colors or a single color on a printed product. The overprinting accuracy requires very high consistency in the printing of the product more than twice. Due to the repeated positioning of the printing material 900 and the cumulative error of the mechanical positioning accuracy of the printing press, it will be difficult to ensure the overprinting accuracy of the printed product. The platform positioning device 600 of the high-speed platform screen printing press solves this problem.

[0065] like Figure 1 and Figure 7 As shown, the platform positioning device 600 includes a mutually compatible positioning rod 610, a positioning sleeve 620, and a positioning cylinder 630. The positioning rod 610 is fixedly mounted on the screen frame clamp 210, the positioning sleeve 620 is mounted on the platform 310, and the output end of the positioning cylinder 630 is fixedly connected to the screen frame clamp 210 and / or the platform 310. It is understood that the positioning rod 610 can also be fixedly mounted on the platform 310, and the positioning sleeve 620 can be mounted on the screen frame clamp 210. Preferably, the positioning rod 610 and the positioning sleeve 620 are both conical in shape to facilitate the insertion of the positioning rod 610 into the positioning sleeve 620. There should be at least two pairs of positioning rods 610 and positioning sleeves 620. For example, in a preferred embodiment of the present application, there are four pairs of positioning rods 610 and positioning sleeves 620.

[0066] Preferably, the platform positioning device 600 further includes a guide sleeve 640 and a positioning wheel 650 , wherein the guide sleeve 640 is sleeved on the root of the positioning rod 610 and is located between the positioning rod 610 and the screen frame clamp 210 .

[0067] The present invention uses the screen frame clamp 210 of the printing device 200 as a positioning reference, and adopts the principle of automatic centering positioning to set four positioning sleeves 620 on both sides of the platform 310. The positioning rod 610 installed on the screen frame clamp 210 is used to position and release the corresponding positioning sleeves 620 fixed on the platform 310.

[0068] The platform positioning device 600 has an automatic centering function, which allows the movable mounted screen frame clamp 210 and platform 310 to converge toward the center point of the positioning sleeve 620 within a small error range, merging the two bodies at their center point. The four positioning points constrain the screen frame clamp 210 and platform 310 with six degrees of freedom, achieving consistency between the two bodies. Because the printing screen 220 is fixed to the screen frame clamp 210, the screen frame clamp 210 is the only reference for each platform 310, equivalent to the parent body. If each platform 310 is consistent with the printing screen 220 parent body, its printing overprint accuracy is effectively guaranteed. In addition, this configuration replaces the high-precision, high-specification configuration that typically requires a rotary actuator and power to achieve accurate positioning, directly reducing structural costs.

[0069] This high-speed platform screen printer optimizes and integrates the relevant processes of loading, positioning, printing, and unloading, significantly increasing printing speed. Conventional automatic sheet-fed printing presses are limited by process procedures and paths, with speeds generally below 1,000 sheets per hour. However, the configuration and shortened operating path of this high-speed platform screen printer (requiring only a 60-degree rotation) have increased the speed by over 20%, a historic breakthrough. The platform 310's symmetrical structure around the center facilitates automated centralized control, and the vacuum adsorption device 500 is also innovative. The up-and-down movement of the printing device 200 and the rotation of the printing platform assembly 300 are driven by the same power unit, achieving a combination of rotational and linear motion, resulting in a fast mechanical rhythm and high reliability.

[0070] The above content is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the concept of the present invention, many changes can be made in the specific implementation method and application scope. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of the present invention.

Claims

1. A high-speed platform screen printing machine, comprising a printing frame, a printing device (200) and a power device, characterized in that: The invention also includes a vertically arranged printing platform assembly (300), wherein the printing platform assembly (300) includes a rotating shaft (320) and at least three platforms (310) arranged around the rotating shaft (320), and at least three platforms (310) are arranged in parallel with the rotating shaft (320); the rotating shaft (320) and the printing device (200) are connected to the power device and driven by the power device; the printing device (200) is suspended above the printing platform assembly (300) and is on the same vertical line as the rotating shaft (320); the position below the printing device (200) is a printing station (710); A substrate positioning device (800) is provided on the platform (310), and the substrate positioning device (800) includes an X-axis positioning column (810) and a Y-axis positioning column (820), wherein the X-axis positioning column (810) is fixedly provided on the lower edge of the platform (310), and the Y-axis positioning column (820) is fixedly provided on a side edge of the platform (310); the X-axis positioning column (810) includes a fixed X-axis positioning column (811) and a movable X-axis positioning column (812), wherein the fixed X-axis positioning column (811) is fixedly installed on the platform (310), and the movable X-axis positioning column (812) is movably installed on the platform (310) obliquely upward or obliquely downward; The printing device (200) comprises a screen frame clamp (210), a printing screen (220), a lifting mechanism (230) and a printing scraper (240), wherein the printing screen (220) is fixedly mounted on the screen frame clamp (210), and the printing scraper (240) is fixedly mounted on the lifting mechanism (230); the lifting mechanism (230) comprises a lifting groove frame (231), a groove (232) and a lifting roller (233), wherein the lifting groove frame (231) is fixedly mounted on the screen frame clamp (210) and is used to guide the lifting roller (233) to roll through the groove (232) to open The lifting groove frame (231) is provided; the lifting roller (233) is installed on the printing platform assembly (300); the lifting roller (233) rotates around the rotating shaft (320) along with the platform (310); the lifting groove frame (231) moves linearly up and down along with the lifting roller (233) at the high difference point of the groove (232), thereby driving the printing scraper (240), the screen frame clamp (210) and the printing screen (220) to move up and down together; the up and down movement of the printing device (200) and the rotational movement of the printing platform assembly (300) are driven by the same power device.

2. The high-speed platform screen printing machine according to claim 1, characterized in that: The printing platform assembly (300) comprises six platforms (310), and the six platforms (310) are connected end to end in sequence to form a hexagon.

3. The high-speed platform screen printing machine according to claim 1, characterized in that: The platform (310) is provided with a plurality of air suction microholes (360).

4. The high-speed platform screen printing machine according to claim 1, characterized in that: If the rotation direction of the rotating shaft (320) is backward, the station before the printing station (710) is the loading station (720), and the station after the printing station (710) is the unloading station (730).

5. The high-speed platform screen printing machine according to claim 4, characterized in that: It also includes a vacuum adsorption device (500) for detachably fixing the printing material (900) on the platform (310).

6. The high-speed platform screen printing machine according to claim 5, characterized in that: The vacuum adsorption device (500) comprises a fixed disk (510) and a rotating disk (520) that are interlocked, and the fixed disk (510) and the rotating disk (520) are rotatably connected together.

7. The high-speed platform screen printing machine according to claim 6, characterized in that: The fixed disk (510) is provided with three independent vacuum chambers (511) at the printing station (710), the loading station (720) and the unloading station (730), and the three vacuum chambers (511) are all connected to the vacuum pump pipeline; the rotating disk (520) is provided with multiple vacuum interfaces (521) for communicating with the vacuum chambers (511), and the multiple vacuum interfaces (521) are respectively connected to the pipelines of the multiple platforms (310).

8. The high-speed platform screen printing machine according to claim 1, characterized in that: The invention also includes a platform positioning device (600), wherein the platform positioning device (600) includes a positioning rod (610), a positioning sleeve (620) and a positioning cylinder (630) adapted to each other, wherein the positioning rod (610) is fixedly mounted on the screen frame clamp (210), the positioning sleeve (620) is provided on the platform (310), and the output end of the positioning cylinder (630) is fixedly connected to the screen frame clamp (210) and / or the platform (310).

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