Circulating screen printing line and screen printing machine

Abstract

The utility model discloses a circulating silk-screen printing line and a silk-screen printing machine, which are characterized in that a plurality of vacuum adsorption material placing tables are driven by a turntable assembly, circularly rotate among a feeding station, a printing station and a discharging station, and are in butt joint with a transfer feeding assembly, a printing assembly and a transfer discharging assembly in sequence; the positioning assembly is used for correcting the position of the carrier plate on the vacuum adsorption discharging table located at the feeding station, after the printing assembly completes one-time printing on the target printed matter, the rotary disc assembly is used for rotating the carrier disc rotating to the discharging station from the printing station and the target printed matter back to the feeding station, and then the carrier disc and the target printed matter are rotated to the printing station. The multi-time repeated printing is realized at the printing station, so that the single-time printing ink of the target printed matter reaches the preset thickness, the preset silk-screen printing requirement is met, and the silk-screen printing efficiency is improved. By means of the screen printing machine, the problems that a screen printing machine cannot conduct repeated printing on a printing station, printed products cannot meet the requirements, and the printing efficiency is reduced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing equipment, in particular to a circulating screen printing line and a screen printing machine. Background Art

[0002] Screen printing, also known as silk-screen printing, involves squeezing ink through the mesh of the image onto the substrate using a scraper, creating an image identical to the original. Screen printing is widely used due to its simple equipment, ease of operation, ease of printing and plate making, low cost, and strong adaptability.

[0003] A circulating screen printing machine disclosed in a Chinese patent (publication number: CN221315457U, created by the same inventor as the present application) utilizes a stacking mechanism to stack carrier plates into an empty material frame and transfers the frame with a preset number of stacked carrier plates to an oven mechanism. The oven mechanism then simultaneously dries a batch of target printed products, which are then transported and air-cooled by a cooling and conveying mechanism. The cooled target printed products are then separated by a separating mechanism, thereby solving the problem in related arts of ink overflow in screen printing machines, which affects the quality of printed products.

[0004] However, in the above patents and prior art, after the printing mechanism performs one printing, it is necessary to complete a complete printing process (including drying, cooling and material separation) before the next repeated printing can be performed. Multiple printings cannot be repeated at the printing station, resulting in the ink thickness of the printed product failing to meet the set requirements, affecting the quality of the printed images. At the same time, repeated processes to meet the printing thickness requirements will reduce printing efficiency and increase printing costs.

[0005] Currently, no effective solution has been proposed for the problems in related technologies that screen printing machines cannot perform repeated printing at the printing station, the printed products cannot meet the demand, and the printing efficiency is reduced. Utility Model Content

[0006] In view of this, it is necessary to provide a circulating screen printing line and a screen printing machine to at least solve the problem in the related art that the screen printing machine cannot perform repeated printing at the printing station, the printed products cannot meet the demand and the printing efficiency is reduced.

[0007] In the first aspect, the utility model provides a technical solution as follows: a screen printing machine, including a machine platform, a turntable assembly is provided on the machine platform, the turntable assembly can drive a plurality of vacuum adsorption discharge tables arranged in a circular array, circulates between the loading station, the printing station and the unloading station, and is sequentially docked with the transfer loading assembly, the printing assembly and the transfer unloading assembly arranged on the circumferential side of the turntable assembly, the loading station is also provided with a positioning assembly, wherein the transfer loading assembly is used to transfer the carrier plate carrying the target printed matter to the position located at the loading station On the vacuum adsorption discharge table at the work station, the target printed product includes one of the following: a product to be printed, a printed product that has completed at least one printing; the positioning component is used to correct the position of the carrier plate on the vacuum adsorption discharge table located at the loading station; the printing component is used to screen print the target printed product on the carrier plate located at the printing station; the transfer and unloading component is used to move the carrier plate carrying the target printed product that has completed the target number of printings from the vacuum adsorption discharge table located at the unloading station.

[0008] In some embodiments, the printing assembly includes a lifting base, the lifting base is movably connected to the machine through a telescopic guide rod, and is transmission-connected to a first lifting drive unit provided on the machine, the lifting base is connected to a screen frame support frame through a pull rod, the screen frame support frame is located directly above the printing station, the side wall of the lifting base is provided with a transverse drive unit, the transverse drive unit is transmission-connected to a scraper bracket, the scraper bracket is also connected to a printing scraper and an ink return knife, wherein, before the turntable assembly drives the multiple vacuum adsorption discharge tables to rotate, the first lifting drive unit is used to The lifting base is driven to drive the screen frame support frame, the scraper bracket, the printing scraper and the ink return knife to a preset position directly above the printing station, and when the target printed product moves to the printing station along with the corresponding vacuum adsorption discharge table, the first lifting drive unit is used to drive the screen frame support frame to drive the screen frame to be placed on the target printed product; the horizontal drive unit is used to drive the scraper bracket to drive the printing scraper and the ink return knife to move along the screen frame after the screen frame is placed on the target printed product, so as to screen print the target printed product.

[0009] In some embodiments, the transfer loading assembly and the transfer unloading assembly both include a support frame fixed to the machine, and two transverse transmission units are provided on the truss arm of the support frame, and a slide of each transverse transmission unit is provided with a suction cup gripper connected to the second lifting drive unit, wherein the two transverse transmission units are used to drive the two corresponding slides to drive the corresponding suction cup grippers to move transversely alternately, and cooperate with the second lifting drive unit to drive the suction cup grippers to move vertically, so that the suction cup gripper transfers the carrier carrying the target printed product to the vacuum adsorption unloading table located at the loading station or removes the carrier carrying the target printed product that has completed the target number of prints from the vacuum adsorption unloading table located at the unloading station.

[0010] In some embodiments, the turntable assembly includes a turntable, a turntable shaft, a rotation drive motor and a vacuum unit, the rotation drive motor is arranged on the machine platform, the rotation drive motor is connected to the turntable shaft, the turntable shaft is also connected to the turntable, a plurality of vacuum units are provided on the turntable, and the vacuum units are respectively airtightly connected to the corresponding vacuum adsorption unloading platforms and vacuum pumps, wherein the rotation drive motor drives the turntable through the turntable shaft to drive the plurality of vacuum adsorption unloading platforms to rotate cyclically, and the vacuum pump cooperates with the vacuum unit to make each vacuum adsorption unloading platform adsorb the corresponding carrier plate; and / or the positioning assembly includes a support plate, a third lifting drive unit, a movable positioning device and a fixed positioning device, the third lifting drive unit is fixedly connected to the machine platform, and The pallet is transmission-connected to the pallet, and the pallet is located below the turntable in the setting position. The pallet is provided with three movable positioning devices and three fixed positioning devices that pass through the turntable and extend out. The three movable positioning devices are arranged at positions close to the three vertex corners of the pallet in the setting position. Two of the three movable positioning devices are also arranged to be driven by a synchronous belt module to move along the width direction of the pallet, and the other movable positioning device is arranged to be driven by the corresponding synchronous belt module to move along the length direction of the pallet. Two of the three fixed positioning devices are respectively arranged on two sides of the other vertex corner of the pallet, and the other fixed positioning device is arranged at a position close to the movable positioning device that moves along the length direction of the pallet, and is respectively arranged on two sides of the corresponding vertex corner.

[0011] In the second aspect, the utility model also provides a technical solution as follows: a circulating screen printing line, comprising the screen printing machine of the first aspect, and further comprising a loading mechanism, a stacking conveying mechanism, an oven mechanism, a cooling conveying mechanism and a material dividing conveying mechanism arranged in sequence, the loading and transferring component and the unloading component of the screen printing machine are respectively docked with the material dividing conveying mechanism and the loading mechanism, and a material frame loading mechanism is further provided between the stacking conveying mechanism and the material dividing conveying mechanism, wherein the loading mechanism is used to transfer the carrier plate carrying the target printed matter piece by piece to the empty material frame located on the stacking conveying mechanism, wherein the carrier plate removed from the unloading work station by the loading and unloading component carries the printed matter that has completed at least one printing; the stacking conveying mechanism is used to stack the carrier plate stacks into the empty material frame, and The first material frame with a preset number of stacked carrier plates is transferred to the drying mechanism; the drying mechanism is used to transfer the first material frame to the cooling conveying mechanism, and during the transfer process, dry the target printed products located on the corresponding carrier plates; the cooling conveying mechanism is used to transfer the second material frame carrying the dried target printed products to the material dividing and conveying mechanism, and during the transfer process, cool the dried target printed products; the material dividing and conveying mechanism is used to push out the carrier plates located in the second material frame one by one, and convey the pushed out carrier plates together with the target printed products that have completed the drying at the same time to the docking point with the transfer and loading assembly, and after all the carrier plates are pushed out, convey the corresponding empty material frame to the material frame transfer mechanism, so that the empty material frame can be transferred to the stacking conveying mechanism through the material frame transfer mechanism.

[0012] In some embodiments, the loading mechanism includes a first frame, on which two first conveyors are sequentially provided along the conveying direction, and a first reversing conveyor is further provided between the two first conveyors, wherein one of the two first conveyors, after receiving the carrier plate carrying the corresponding target printed matter, transfers the corresponding carrier plate to the first reversing conveyor, and the other first conveyor is used to receive the carrier plate output by the first reversing conveyor, and transfer the carrier plates one by one to the empty material frame located on the stacking conveying mechanism; the first reversing conveyor includes a second conveyor and a rotation drive unit connected to the second conveyor in a transmission manner, the rotation drive unit being fixed on the first frame, and the rotation drive unit being used to drive the second conveyor to carry the carrier plate conveyed by one of the two first conveyors for reversing rotation, and transfer the corresponding carrier plate to the other first conveyor after the reversing rotation.

[0013] In some embodiments, the stacking conveying mechanism includes a first pushing assembly, a lifting stacking assembly and a third conveyor, wherein the first pushing assembly is arranged on the first conveyor near the output end of the loading mechanism, and includes a first slide and a first push rod, the first slide is transmission-connected to the first push rod, and is used to drive the first push rod to move toward the lifting stacking assembly, so that the first push rod pushes the carrier plate that has been conveyed to the empty material frame into place; the lifting stacking assembly is arranged at a docking position with the output end of the loading mechanism, and includes a vertically arranged first screw transmission pair, two transmission screws of the first screw transmission pairs arranged opposite to each other and spaced apart are connected by a first synchronous chain transmission, the transmission screw of one of the two first screw transmission pairs is also transmission-connected to the first drive unit, the sliding nut of the first screw transmission pair is also connected to the stacking carrier plate, and the stacking carrier plate is provided with a first material frame conveyor, wherein the first drive unit drives the two first The screw transmission pair drives the stacking carrier and the first material frame conveyor to rise and fall according to preset steps, so that the corresponding first conveyor transports the carriers one by one to the empty material frame located on the first material frame conveyor; the first material frame conveyor is used to receive the empty material frame transferred by the material frame transfer mechanism and transfer the first material frame with a preset number of stacked carriers to the third conveyor; the third conveyor is respectively docked with the lifting and stacking component and a first reversing component of the oven mechanism, and is used to transfer the first material frame to the first reversing component; and / or the cooling conveying mechanism includes a fourth conveyor docked with the first reversing component located on the other side of the oven mechanism, the fourth conveyor is used to transfer the second material frame carrying the dried target printed products transported by the corresponding first reversing component to the material dividing conveying mechanism, wherein, during the process of the second material frame being conveyed by the fourth conveyor, the target printed products on the carrier in the second material frame are air-cooled.

[0014] In some embodiments, the oven mechanism further includes a plurality of ovens docked in sequence along the extension direction of the oven mechanism, the ovens located at the front and rear ends of the extension direction of the oven mechanism are respectively docked with a first reversing assembly, the drying channels of the plurality of ovens are connected to form a drying channel, and a first chain conveyor is provided at the bottom of each oven in the drying channel, wherein the first reversing assembly includes a second frame, a roller conveyor, a fourth lifting drive unit and a second chain conveyor, the second chain conveyor is provided on the second frame and is flush with the corresponding first chain conveyor, the fourth lifting drive unit is fixed to the second frame and is movably embedded in the second The roller conveyor in the chain conveyor is connected in transmission, and the fourth lifting drive unit drives the roller conveyor to move vertically so that the roller conveyor is docked with the third conveyor, the second chain conveyor and the fourth conveyor, so that the first material frame output from the stacking conveying mechanism is transported to the corresponding first chain conveyor, and the second material frame output from the corresponding oven is transported to the fourth conveyor; multiple first chain conveyors are used to transport the first material frame transmitted by a corresponding first reversing component to another first reversing component, so that the first material frame drives the corresponding carrier plate and target printed matter to flow through the drying channel and dry the target printed matter.

[0015] In some embodiments, the material distribution and conveying mechanism includes a second pushing assembly, a lifting and lowering material distribution assembly and a fifth conveyor, wherein the second pushing assembly is arranged on the cooling conveying mechanism, and includes a second slide and a second push rod, the second slide is transmission-connected to the second push rod, and is used to drive the second push rod to move toward the lifting and lowering material distribution assembly, so that the second push rod pushes the carrier plates located in the second material frame to the fifth conveyor one by one; the lifting and lowering material distribution assembly is arranged at a docking position with the output end of the fifth conveyor, and includes a vertically arranged second screw transmission pair, and the transmission screws of the two second screw transmission pairs arranged opposite to each other are connected by a second synchronous chain transmission, and the transmission screw of one of the two second screw transmission pairs is also transmission-connected to the second drive unit, The sliding nut of the second screw transmission pair is also connected to the material dividing carrier plate, and a second material frame conveyor is provided on the material dividing carrier plate, wherein the second driving unit drives the two second screw transmission pairs to drive the material dividing carrier plate and the second material frame conveyor to rise and fall according to a preset step, so that the second push rod pushes out the carrier plates located in the second material frame one by one; the second material frame conveyor is used to receive the second material frame transmitted by the cooling conveying mechanism and transfer the empty material frame after material division to the docking position with the material frame transfer mechanism; the fifth conveyor is used to transport the carrier plate pushed out by the second pushing assembly together with the target printed product that has completed the drying at the same time to the docking position with the transfer and loading assembly, wherein the fifth conveyor includes one of the following: a synchronous belt conveyor and a chain conveyor.

[0016] In some embodiments, the material frame transferring mechanism includes a gantry, a linear guide rail is provided on the truss of the gantry, a sliding frame that can slide along the linear guide rail is hung on the linear guide rail, the sliding frame is also connected to the driving motor fixed on the gantry through a follower block and a transmission belt, the sliding frame is also provided with a driving cylinder connected to the clamp gripper, the clamp gripper is also movably connected to the sliding frame through a guide column and a guide sleeve, the driving motor drives the sliding frame to drive the clamp gripper to slide along the linear guide rail, and cooperates with the driving cylinder to drive the clamp gripper to rise and fall, so that the clamp gripper clamps the empty material frame from the docking position with the second material frame conveyor and transfers it to the stacking conveying mechanism.

[0017] Compared with the prior art, the circulating screen printing line and screen printing machine provided in the embodiment of the present application adopt a plurality of vacuum adsorption discharge tables arranged in a circular array through a turntable assembly, which circulate between the loading station, printing station and unloading station, and are docked with the transfer loading assembly, printing assembly and transfer unloading assembly arranged on the side of the turntable assembly in turn, and the position of the carrier plate on the vacuum adsorption discharge table at the loading station is corrected by the positioning assembly. After the printing assembly completes printing of the target printed product once, the carrier plate and the target printed product that are rotated from the printing station to the unloading station are rotated back to the loading station through the turntable assembly, and then rotated to the printing station, so as to realize multiple repeated printing at the printing station, so that the ink of the target printed product printed in a single time reaches a preset thickness, meets the preset screen printing requirements, improves the screen printing efficiency, and solves the problems in the related art that the screen printing machine cannot perform repeated printing at the printing station, the printed products cannot meet the requirements and the printing efficiency is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a three-dimensional structure of a screen printing machine according to an embodiment of the present application;

[0019] Figure 2 Another schematic diagram of the three-dimensional structure of the screen printing machine according to an embodiment of the present application;

[0020] Figure 3 A perspective view of a loading and unloading assembly and a loading and unloading assembly according to an embodiment of the present application;

[0021] Figure 4 A perspective view of a printing assembly according to an embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the assembly of the positioning assembly and the turntable assembly according to an embodiment of the present application;

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of a circulating screen printing line according to an embodiment of the present application;

[0024] Figure 7 A three-dimensional diagram of a feeding mechanism according to an embodiment of the present application;

[0025] Figure 8 A perspective view of a stacking and conveying mechanism according to an embodiment of the present application;

[0026] Figure 9 A three-dimensional diagram of an oven mechanism according to an embodiment of the present application;

[0027] Figure 10 A three-dimensional diagram of a material distribution and conveying mechanism according to an embodiment of the present application;

[0028] Figure 11This is a three-dimensional diagram of the material frame transfer mechanism according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] It should be noted that when a component is referred to as being "mounted on" another component, it may be mounted directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items. Example 1

[0032] See also Figures 1 to 5 The screen printing machine of the embodiment of the present application includes a machine platform 11, on which a turntable assembly 12 is provided. The turntable assembly 12 can drive multiple vacuum adsorption discharge tables 13 arranged in a circular array, circulate between the loading station 001, the printing station 002 and the unloading station 003, and sequentially connect with the transfer loading assembly 14, the printing assembly 15 and the transfer unloading assembly 16 arranged on the side of the turntable assembly 12. A positioning assembly 17 is also provided at the loading station 001, wherein,

[0033] The transfer loading component 14 is used to transfer the carrier plate 01 carrying the target printed product to the vacuum adsorption unloading table 13 located at the loading station 001. The target printed product includes one of the following: a product to be printed or a printed product that has been printed at least once.

[0034] In this embodiment, the product to be printed refers to a printed product that has not undergone a complete printing process. However, before each printing, it is necessary to ensure that the substrate is dry and dried to prevent ink overflow and cause confusion in the silk screen pattern. Therefore, the product to be printed is dried. In this embodiment, the initial loading position of the product to be printed is not at the docking position with the material transfer and loading component 14; similarly, the printed product that has completed at least one printing has also completed the corresponding drying and drying and setting process. The printed product that has completed at least one printing can be the product to be printed that has completed the previous repeated printing, or it can be the printed product that has completed multiple repeated printings.

[0035] In this embodiment, the material transfer and loading component 14 is used to receive the carrier plate 01 carrying the printed product to be currently repeated printed from the preset station, and then translate it to the vacuum adsorption discharge table 13 at the loading station 001 which is transmitted by the turntable component 12. The positioning component 17 then performs lateral and longitudinal position corrections on the carrier plate 01, and then the vacuum adsorption discharge table 13 vacuum adsorbs and fixes the corresponding carrier plate 01, thus completing the entire loading process.

[0036] The positioning component 17 is used to correct the position of the carrier plate 01 on the vacuum adsorption unloading platform 13 located at the loading station.

[0037] In this embodiment, the position correction is performed by pushing the carrier plate 01 horizontally and vertically, so that when the carrier plate 01 and the corresponding target printed product are rotated to the printing station 002 along with the vacuum adsorption discharge table 13, the target printed product is placed at the preset printing position, and when the printing component 15 prints, the preset image and text can be printed at the corresponding position of the printed product.

[0038] The printing assembly 15 is used to perform screen printing on the target printed product on the carrier plate 01 located at the printing station 002.

[0039] In this embodiment, when the turntable assembly 12 drives multiple vacuum adsorption discharge tables 13 and the corresponding carrier plates 01 and the target printed product to rotate from the loading station 001 to the printing station 002, or from the printing station 002 to the unloading station 003, the printing assembly 15 is configured to perform vertical lifting and avoiding position, so that when the vacuum adsorption discharge table 13 and the corresponding carrier plates 01 and the target printed product are located at the printing station 002, the screen frame 02 supported by the screen frame support frame 155 of the printing assembly 15 and the scraper bracket 157 connected to the printing scraper 158 and the ink return knife 159 are located above the target printed product. Then, after the screen frame 02 is driven and placed on the target printed product, the scraper bracket 157 is driven to drive the printing scraper 158 and the ink return knife 159 to move back and forth left and right to implement printing.

[0040] The transfer and unloading component 16 is used to move the carrier plate 01 carrying the target printed product that has completed the target number of prints from the vacuum adsorption unloading table 13 located at the unloading station 003.

[0041] In this embodiment, when the turntable assembly 12 drives multiple vacuum adsorption discharge tables 13 and the corresponding carriers 01 and target printed products to rotate, the carriers 01 and target printed products that rotate from the printing station 002 to the unloading station 003 will have two directions. One is to be placed on the vacuum adsorption discharge table 13 without moving, and rotate to the temporary retention station 004 and the loading station 001 as the turntable assembly 12 is driven to rotate, and the other is to be moved away by the transplanting unloading assembly 16; when the number of printing times of the target printed product does not reach the preset number (for example: the preset number of printing times is 3 times, and the current time is the second time), it will rotate to the unloading station 00 3's carrier plate 01 and target printed product will not be transferred by the transfer unloading component 16, but will follow the corresponding vacuum adsorption unloading table 13 to move to the temporary retention station 004, and then rotate to the loading station 001. In this way, the target printed product will be repeatedly printed multiple times in a single process; and when the number of printings of the target printed product reaches the preset number of times, that is, in the current process, the ink on the printed product reaches the preset thickness, at this time, the carrier plate 01 and the corresponding target printed product on the vacuum adsorption unloading table 13 at the unloading station 003 are removed by the transfer unloading component 16, that is, the corresponding transfer unloading is completed.

[0042] In the above-mentioned screen printing machine, a plurality of vacuum adsorption discharge tables 13 arranged in a circular array driven by a turntable assembly 12 are used to circulate between the loading station 001, the printing station 002 and the unloading station 003, and are docked with the transfer loading assembly 14, the printing assembly 15 and the transfer unloading assembly 16 arranged on the side of the turntable assembly 12 in turn, and the position of the carrier plate 01 on the vacuum adsorption discharge table 13 at the loading station 001 is corrected by the positioning assembly 17. After the printing assembly 15 completes printing of the target printed product once, the carrier plate and the target printed product that are rotated from the printing station 002 to the unloading station are transferred back to the loading station through the turntable assembly 12, and then rotated to the printing station, so as to realize multiple repeated printing at the printing station, so that the ink of the target printed product printed in a single time reaches a preset thickness, meets the preset screen printing requirements, improves the screen printing efficiency, and solves the problems in the related art that the screen printing machine cannot perform repeated printing at the printing station, the printed products cannot meet the requirements and the printing efficiency is reduced.

[0043] It should be noted that, in this embodiment, for target printed products that need to be printed repeatedly, the vacuum adsorption discharge table 13 is driven by the turntable assembly 12 to rotate repeatedly between the loading station 001, the printing station 002, the unloading station 003 and the temporary holding station 004, thereby realizing cyclic repeated printing. For target printed products that need to be printed repeatedly, before the target number of prints is completed, when it rotates to the unloading station 003, the transplanting and unloading assembly 16 is controlled not to transplant and unload, so that it enters the next cyclic printing process.

[0044] In order to print the target printed product, refer to Figures 1 to 5 In some embodiments, the printing assembly 15 includes a lifting base 151, which is movably connected to the machine platform 11 through a telescopic guide rod 152 and is transmission-connected to a first lifting drive unit 153 provided on the machine platform 11. The lifting base 151 is connected to a screen frame support frame 155 through a pull rod 154. The screen frame support frame 155 is located directly above the printing station 002. A transverse drive unit 156 is provided on the side wall of the lifting base 151. The transverse drive unit 156 is transmission-connected to a scraper bracket 157. The scraper bracket 157 is also connected to a printing scraper 158 and an ink return blade 159.

[0045] Before the turntable assembly 12 drives the multiple vacuum adsorption discharge tables 13 to rotate, the first lifting drive unit 153 is used to drive the lifting base 151 to drive the screen frame support frame 155, the scraper bracket 157, the printing scraper 158 and the ink return knife 159 to rise to the preset position directly above the printing station 001, and when the target printed product moves to the printing station 002 with the corresponding vacuum adsorption discharge table 13, the first lifting drive unit 153 is used to drive the screen frame support frame 155 to drive the screen frame 02 to be placed on the target printed product.

[0046] In this embodiment, the first lifting drive unit 153 is composed of two synchronous shafts 1531 and an electric cylinder 1533 synchronously connected to a servo motor 1532. The output shaft of each electric cylinder 1533 is connected to the lifting base 151, and the servo motor 1532 drives the two electric cylinders 1533 to move synchronously, thereby lifting the lifting base 151 or driving the lifting base 151 to descend.

[0047] In this embodiment, when printing, it is necessary to place the screen frame 02 (with corresponding graphics) on the target printed matter, and at the same time, it is necessary to place the printing scraper 158 and the ink return knife 159 on the screen frame 02, so that when the printing scraper 158 and the ink return knife 159 are driven to print, the printing scraper 158 and the ink return knife 159 can scrape the ink in the screen frame 02, thereby printing the graphics on the target printed matter; in this embodiment, the first lifting drive unit 153 drives the lifting base 151 to drive the screen frame support frame 155, the scraper bracket 157, The printing scraper 158 and the ink return knife 159 rise to the height just above the printing station 002, as long as the turntable assembly 12 can drive the vacuum adsorption discharge table 13 to rotate, and prevent the screen frame 02 and the printing scraper 158 and the ink return knife 159 from contacting the target printed matter, thereby preventing the target printed matter from being scratched when the turntable assembly 12 rotates; and when the target printed matter moves to the position above the printing station 002, at this time, the first lifting drive unit 153 drives the lifting base 151 to drive the screen frame 02, the scraper bracket 157, the printing scraper 159 and the ink return knife 159 to rotate. 8 and the ink return knife 159 fall back to make the screen frame 02 placed on the target printed matter, so that the corresponding graphics can be printed on the target printed matter; it should be noted that in this embodiment, the lifting base 151 is fixedly connected to the screen frame support frame 155 and the scraper bracket 157, and the printing scraper 158 and the ink return knife 159 are fixedly connected to the scraper bracket 157. Therefore, the positional relationship between the screen frame 02 and the printing scraper 158 and the ink return knife 159 is also fixed, that is, no matter what height the screen frame 02 is placed at, the distance between the printing scraper 158 and the ink return knife 159 is fixed. The height of the screen frame 02 is fixed, so when the first lifting drive unit 153 drives the lifting base 151 to move vertically to the target printed product, the printing scraper 158 and the ink return knife 159 are also at a position height that meets the printing requirements in the vertical direction; in this embodiment, the height of the screen frame 02, the printing scraper 158 and the ink return knife 159 in the vertical direction is determined as the first lifting drive unit 153 drives the lifting base 151 to move vertically, and the printing scraper 158 and the ink return knife 159 will not move vertically relative to the scraper space 157.

[0048] The transverse driving unit 156 is used to drive the printing scraper 158 and the ink return blade 159 to move along the screen frame 02 after the screen frame 02 is placed on the target printed product, so as to screen print the target printed product.

[0049] In this embodiment, the scraper bracket 157 is driven by the transverse driving unit 156 to drive the printing scraper 158 and the ink return knife 159 to slide left and right along the length direction of the screen frame 02, thereby printing the image and text on the screen frame 02 onto the target printed product.

[0050] In some optional embodiments, the transverse drive unit 156 includes but is not limited to a synchronous belt drive module. In this embodiment, the transverse drive unit 156 is composed of a drive motor 1561, a synchronous transmission belt 1562, a linear slide 1563 and a slide 1564. The slide 1564 is hung on two vertically spaced and laterally extended linear slides 1563. The scraper bracket 157 is fixed to the slide 1564. The slide 1564 is also connected to the drive motor 1561 through the synchronous transmission belt 1562. The drive motor 1561 drives the slide 1564 to slide along the linear slide 1563 through the synchronous transmission belt 1562, and the corresponding transmission scraper bracket 157 drives the printing scraper 158 and the ink return knife 159 to move along the screen frame 02.

[0051] In some embodiments, in order to wash the screen frame 02 that has been printed multiple times, refer to Figure 4 , a dish washing roller assembly 19 driven by a transverse module 18 (disposed on a support plate connected to a lifting base 151) is provided below the screen frame 02. When the screen frame 02 needs to be washed, the first lifting drive unit 153 drives the lifting base 151 to drive the screen frame 02, the scraper bracket 157, the printing scraper 158 and the ink return knife 159 to rise to the top of the dish washing roller assembly 19. Then, the transverse module 18 drives the dish washing roller assembly 19 to move, and in the process of rolling over the bottom of the screen frame 02, the roller 191 of the dish washing roller assembly 19 is driven to rotate by the plate washing motor 192, thereby achieving the washing of the screen frame 02. In this embodiment, the transverse film module 18 includes but is not limited to a linear motor and a linear module.

[0052] In order to realize the transfer of the carrier plate 01 and the target printed product, so as to transfer the carrier plate 01 carrying the target printed product to the corresponding vacuum adsorption discharge table 13 or remove it from the vacuum adsorption discharge table 13, refer to Figures 1 to 3 In some embodiments, the loading and transferring assembly 14 and the unloading and transferring assembly 16 both include a support frame 161 fixed to the machine table 11, and two transverse transmission units 162 are provided on the truss arm of the support frame 161. The slide 163 of each transverse transmission unit 162 is provided with a suction cup gripper 165 that is transmission-connected to the second lifting drive unit 164, wherein the two transverse transmission units 162 are used to drive the two corresponding slides 163 to drive the corresponding suction cup grippers 165 to move laterally alternately, and cooperate with the second lifting drive unit 164 to drive the suction cup grippers 165 to move vertically, so that the suction cup grippers 165 transfer the carrier plate 01 carrying the target printed product to the vacuum adsorption unloading table 13 located at the loading station or remove the carrier plate 01 carrying the target printed product that has completed the target number of prints from the vacuum adsorption unloading table 13 located at the unloading station 003.

[0053] In this embodiment, the transverse transmission unit 162 includes but is not limited to a synchronous belt transmission module and a ball screw transmission module; the second lifting drive unit 164 includes but is not limited to a driving cylinder and a linear motor; in this embodiment, two transverse transmission units 162 are provided on the truss arm, and the driving stroke corresponding to the second lifting drive unit 164 provided on the slide 163 connected to the upper transverse transmission unit 162 is longer than the driving stroke of the second lifting drive unit 164 provided on the slide 163 connected to the lower transverse transmission unit 162, so that the corresponding suction cup gripper 165 can be driven to move to grab the carrier plate 01 located on the corresponding vacuum adsorption discharge table 13; in this embodiment, by setting two suction cup grippers 165 for alternately transferring the carrier plate 01, the transfer efficiency is improved by alternating grabbing.

[0054] In order to realize the transmission of multiple vacuum adsorption unloading tables 13 circulating between multiple stations, refer to Figure 1 、 Figure 2 and Figure 5 In some embodiments, the turntable assembly 12 includes a turntable 121, a turntable shaft 122, a rotary drive motor, and a vacuum unit 123. The rotary drive motor (not shown in the drawings) is mounted on the machine platform 11 and is in transmission connection with the turntable shaft 122. The turntable shaft 122 is also in transmission connection with the turntable 121. The turntable 121 is provided with a plurality of vacuum units 123. The vacuum units 123 are respectively connected to the corresponding vacuum adsorption discharge platform 13 and a vacuum pump (not shown in the drawings) in an airtight manner.

[0055] The rotary drive motor drives the turntable 121 through the turntable shaft 122, driving multiple vacuum adsorption discharge tables 13 to rotate cyclically. The vacuum pump cooperates with the vacuum unit 123 to enable each vacuum adsorption discharge table 13 to adsorb the corresponding carrier 01.

[0056] In this embodiment, the arc of the distance between the loading station 001, the printing station 002, the unloading station 003 and the temporary station 004 is 90 degrees, and the rotary drive motor drives the turntable 121 to rotate intermittently, and each time it rotates, the vacuum adsorption discharge table 13 between the two adjacent stations rotates from one station to another, that is, rotates 90 degrees, and the cyclic rotation of multiple vacuum adsorption discharge tables 13 is carried out in this way; in this embodiment, the pipeline of the vacuum unit 123 passes through

[0057] In order to realize the positioning of the carrier plate 01 so that the printing assembly 15 can accurately print the target printed product, refer to Figure 1 、 Figure 2 and Figure 5The positioning assembly 17 includes a support plate 171, a third lifting drive unit 172, a movable calibration device 173 and a fixed calibration device 174. The third lifting drive unit 172 is fixed to the machine platform 11 and is in transmission connection with the support plate 171. The support plate 171 is located below the turntable 121 in the setting position. The support plate 171 is provided with three movable calibration devices 173 and three fixed calibration devices 174 that pass through the turntable 121 and extend out. The three movable calibration devices 173 are located near the three vertex corners of the support plate 171 in the setting position. The three movable calibration devices 173 are located near the three vertex corners of the support plate 171 in the setting position. Two of the positioning devices 173 are also configured to be driven by the synchronous belt module 175 to move along the width direction of the pallet 171, and another movable positioning device 173 is configured to be driven by the corresponding synchronous belt module 175 to move along the length direction of the pallet 171. Two of the three fixed positioning devices 174 are respectively arranged on the two sides of the other top corner of the pallet 171, and the other fixed positioning device 174 is arranged at a position close to the movable positioning device 173 that moves along the length direction of the pallet 171, and is respectively arranged on the two sides of the corresponding top corner.

[0058] In this embodiment, in order to describe the setting positions of the three movable calibration devices 173 and the three fixed calibration devices 174, the four sides of the support plate 171 are defined as the first side 03, the second side 04, the third side 05 and the fourth side 06 in a counterclockwise direction. A movable calibration device 173 is respectively provided on the first side 03 near two corresponding vertex positions, and another movable calibration device 173 is provided on the fourth side 06 away from the other side intersecting with the first side 03. A fixed calibration device 174 is provided near the second side 04 away from a vertex position intersecting with the first side 03, and a fixed calibration device 174 is provided on the third side 05 near two corresponding vertex positions. The direction of the loading and shifting assembly 17 is parallel to the fourth side 06. When the loading and shifting assembly 17 loads the carrier plate 01 to the position When on the vacuum adsorption discharge table 13 at the loading station 001, the two movable positioning devices 173 located on the first side 03 push the carrier plate 01 toward the two fixed positioning devices 174 located on the outside of the third side 05, and then perform longitudinal calibration. Then the movable positioning device 173 located on the fourth side 06 pushes the carrier plate 01 toward the fixed positioning device 174 located on the outside of the second side 04, and then performs transverse calibration. After completing the transverse and longitudinal calibrations, the carrier plate 01 carries the corresponding target printed product and is placed at the preset printing position. When the turntable assembly 12 drives the corresponding vacuum adsorption discharge table 13 to drive the corresponding carrier plate 01 and the target printed product from the loading station 001 to the printing station 002, the target printed product is in the corresponding printing position, so that the printing assembly 15 can perform precise printing.

[0059] It can be understood that the support plate 171 is arranged below the turntable 121, and the movable positioning device 173 and the fixed positioning device 174 need to pass through the turntable 121. Therefore, on the sides of the turntable 121 corresponding to the loading station 001, the printing station 002, the unloading station 003 and the temporary station 004, there are guide holes (not numbered in the drawings) for the fixed positioning device 174 to pass through, and slide grooves (not numbered in the drawings) for the movable positioning device 173 to move. Example 2

[0060] See also Figures 6 to 10 The embodiment of the present application further provides a circulating screen printing line, comprising the screen printing machine 100 in embodiment 1, and further comprising a loading mechanism 200, a stacking conveying mechanism 300, an oven mechanism 400, a cooling conveying mechanism 500, and a material distribution conveying mechanism 600 arranged in sequence. The loading and unloading component 14 and the unloading and unloading component 16 of the screen printing machine 100 are respectively connected to the material distribution conveying mechanism 600 and the loading mechanism 200. A material frame loading and unloading mechanism 700 is further provided between the stacking conveying mechanism 300 and the material distribution conveying mechanism 600.

[0061] The loading mechanism 200 is used to transport the carrier plate 01 carrying the target printed products piece by piece to the empty material frame located on the stacking conveying mechanism 300, wherein the carrier plate 01 removed from the unloading workstation by the transfer unloading component 16 carries the printed products that have completed at least one printing.

[0062] In this embodiment, during the initial loading, the carrier plate 01 is loaded at the loading mechanism 200 (this corresponds to the target printed products that have not yet been dried, including the printed products that have not been printed and the printed products that have been transferred out by the transfer unloading component 16 and have completed a single process printing). That is, the same batch of printed products to be printed must be loaded piece by piece, and then transported to the stacking conveying mechanism 300 through the loading mechanism 200 for stacking of the carrier plates 01; at the same time, the carrier plates 01 and the target printed products that have been transferred and unloaded from the screen printing machine 100 need to flow to the drying oven mechanism 400. At this time, the loading mechanism 200 serves as an intermediate conveying bridge to directly transport the completed printed products to the drying oven mechanism 400. When the carrier plate 01 of the printed product is transported to the stacking conveying mechanism 300, it can be understood that, under the requirement of single repeated printing, in order to meet the total printing thickness of the printed product, the same batch of printed products will be printed multiple times (that is, cyclically dried, cooled, and divided). Therefore, the loading mechanism 200 will also transport the carrier plates 01 of the same batch from the screen printing machine 100 to the stacking conveying mechanism 300 multiple times. In this embodiment, the screen printing machine 100 and the stacking conveying mechanism 300 are connected through the loading mechanism 200, forming a circulating screen printing line that is connected in the first place and meets the requirements of cyclic drying and printing.

[0063] The palletizing conveying mechanism 300 is used to stack the carrier plates 01 in an empty material frame and to transfer the first material frame with a preset number of palletized carrier plates 01 to the oven mechanism 400 .

[0064] In this embodiment, the stacking conveying mechanism 300 first receives the empty material frame conveyed by the material frame transfer mechanism 700. At this time, the cavity of the empty material frame is facing the loading mechanism 200, and initially, the height of the material trough at the bottom of the empty material frame is not higher than the height of the conveying carrier 01 at the top of the loading mechanism 200. In this way, the carrier 01 conveyed by the loading mechanism 200 can be smoothly fed into the corresponding material trough. After completing the stacking of a carrier 01, the stacking conveying mechanism 300 will drive the material frame to descend vertically by the height of a trough. degree to receive the next conveyed carrier plate 01; when the stacking conveying mechanism 300 drives the material frame to descend vertically, so that a preset number of carrier plates 01 are stacked in the material frame, the stacking conveying mechanism 300 will drive the material frame to drive the preset number of carrier plates 01 to the bottom, and then horizontally transfer the corresponding material frame (corresponding to the first material frame) to the docking point with the drying oven mechanism 400, and then transfer it to the drying oven mechanism 400 for drying. After that, the material frame transfer mechanism 700 will transfer a new empty material frame to the stacking conveying mechanism 300.

[0065] The oven mechanism 400 is used to transfer the first material frame to the cooling and conveying mechanism 500 , and to dry the target printed product on the corresponding carrier plate 01 during the transfer process.

[0066] In this embodiment, the oven mechanism 400 has both steering, conveying and drying functions, that is, the first material frame conveyed by the stacking conveying mechanism 300 is reversed by the first reversing component 41 of the oven mechanism 400 and then transferred to the oven mechanism 400, while the second material frame that has completed drying is reversed by the first reversing component 41 provided on the other side of the oven mechanism 400 and then conveyed to the cooling conveying mechanism 500; at the same time, the ovens 42 corresponding to the oven mechanism 400 are arranged along the conveying direction, and each oven 42 is provided with a corresponding first chain conveyor 43, so that the target printed matter to be dried is dried in the process of conveying the first material frame carrying the target printed matter to be dried through all the ovens 42, and at the same time, when the first material frame is output from the oven mechanism 400, the second material frame that has completed drying is reversed by the first reversing component 41 provided on the other side of the oven mechanism 400 and then conveyed to the cooling conveying mechanism 500.

[0067] The cooling conveying mechanism 500 is used to convey the second material frame carrying the dried target printed product to the material separation conveying mechanism 600 , and to cool the dried target printed product during the conveying process.

[0068] In this embodiment, the cooling conveying mechanism 500 takes into account both the transmission and cooling functions, that is, in the process of conveying the second material frame carrying the dried target printed product to the material separation and conveying mechanism 600, the target printed product is cooled based on the transmission time slot to avoid the ink adhesion caused by directly sending the newly dried target printed product to the screen printing machine 100 for printing, which will affect the quality of the printed images and texts. In this embodiment, the deployment and design of the cooling conveying mechanism 500 and the transmission speed are such that when the carrier plate 01 is conveyed to the material separation and conveying mechanism 600, the target printed product has been cooled to the set temperature, which does not affect the re-printing of the target printed product.

[0069] The material distribution and conveying mechanism 600 is used to push out the carrier plates 01 located in the second material frame one by one, and convey the pushed out carrier plates 01 together with the target printed products that have completed the drying at the same time to the docking point with the transfer and loading component 14, and after all the carrier plates 01 are pushed out, convey the corresponding empty material frame to the material frame transfer mechanism 700, so that the empty material frame can be transferred to the stacking conveying mechanism 300 through the material frame transfer mechanism 700.

[0070] In this embodiment, the function of the material distribution and conveying mechanism 600 is opposite to that of the stacking and conveying mechanism 300, that is, the material distribution and conveying mechanism 600 first receives the second material frame conveyed by the cooling conveying mechanism 500. At this time, the cavity of the second material frame is facing the material distribution and conveying mechanism 600, and initially, the height of the material trough at the top of the second material frame is higher than the height of the conveying carrier 01 at the top of the material distribution and conveying mechanism 600. In this way, the carrier 01 in the second material frame can be smoothly pushed out of the material distribution and conveying mechanism 600. After a carrier 01 is pushed out of the second material frame, the material distribution and conveying mechanism 600 will drive the material frame to rise vertically by the height of a material trough, and then make the next carrier 01 flush with the height of the conveying carrier 01 at the top of the material distribution and conveying mechanism 600; when the material distribution and conveying mechanism 600 drives the second material frame to rise vertically, after the carrier 01 in the second material frame is completely pushed out, the material distribution and conveying mechanism 600 will drive the corresponding empty material frame to rise to the top, and then horizontally transmit the corresponding The empty material frame is docked with the material frame transfer mechanism 700, and then the material frame transfer mechanism 700 transfers the empty material frame to the stacking conveying mechanism 300; the material distribution conveying mechanism 600 also transports the carrier plate 01 carrying the target printed product that has completed the current drying and is to be printed to the docking position with the screen printing machine 100, so that the screen printing machine 100 can repeatedly screen print the target printed product located on the corresponding carrier plate 01, and / or unload the carrier plate 01 carrying the target printed product that has completed printing and drying; in this embodiment, when the number of printing times of the target printed product on the corresponding carrier plate 01 (the number of times on the circulating screen printing line) reaches a preset number, at this time, the corresponding carrier plate 01 is unloaded together with the target printed product at the material distribution conveying mechanism 600; and when the number of printing times of the target printed product on the corresponding carrier plate 01 does not reach the preset number, the material distribution conveying mechanism 600 will transport the corresponding carrier plate 01 to the screen printing machine 100 for corresponding repeated screen printing.

[0071] In the above-mentioned circulating screen printing line, a stacking conveying mechanism 300 is used to stack the carrier plates 01 into an empty material frame and to transfer the material frame with a preset number of stacked carrier plates 01 to the drying oven mechanism 400. The target printed products of the same batch are synchronously dried by the drying oven mechanism 400, and then transported and air-cooled by the cooling conveying mechanism 500. The cooled target printed products are separated by the material separation conveying mechanism 600, so that after the target printed products are conveyed to the screen printing machine 100 by the material separation conveying mechanism 600, they are repeatedly printed again, thereby realizing screen printing of images and texts of a preset thickness, with high quality of printed products and little ink overflow, thereby improving printing efficiency and reducing printing costs.

[0072] In order to realize the conveyance of the carrier plate 01 carrying the target printed matter to the stacking conveying mechanism 300, refer to Figures 6 to 8In some embodiments, the loading mechanism 200 includes a first frame 21, on which two first conveyors 22 are sequentially arranged along the conveying direction, and a first reversing conveyor 23 is further arranged between the two first conveyors 22, wherein,

[0073] One of the two first conveyors 22 receives the carrier plate 01 carrying the corresponding target printed product and transfers the corresponding carrier plate 01 to the first reversing conveyor 23. The other first conveyor 22 is used to receive the carrier plate 01 output by the first reversing conveyor 23 and transport the carrier plates 01 piece by piece to the empty material frame located on the stacking conveying mechanism 300.

[0074] In this embodiment, the carrier plate 01 carrying the unprinted product to be printed can be loaded onto another first conveyor 22, but it is necessary to ensure that the orientation of the product to be printed is in the preset direction when loading, so that the graphics can be printed in the correct direction when the screen printing machine 100 prints; the carrier plate 01 unloaded from the screen printing machine 100 is first conveyed by one of the two first conveyors 22 (the one close to the screen printing machine 100), and then reversed by the first reversing conveyor 23 so that the orientation of the target printed product is reversed to the preset direction, and then transferred to the other first conveyor 22 (close to the stacking conveying mechanism 300) for conveyance.

[0075] In this embodiment, the first conveyor 22 includes but is not limited to a belt conveyor and a chain conveyor.

[0076] The first reversing conveyor 23 includes a second conveyor 24 and a rotation drive unit 25 that is transmission-connected to the second conveyor 24. The rotation drive unit 25 is fixed on the first frame 21. The rotation drive unit 25 is used to drive the second conveyor 24 to carry the carrier plate transported by one of the two first conveyors 22 to perform reversing rotation, and after the reversing rotation, the corresponding carrier plate is transferred to the other first conveyor 22.

[0077] In this embodiment, in order to ensure that the orientation of the target printed product removed from the screen printing machine 100 matches the set direction when it is transferred to the screen printing machine 100 for repeated printing next time, it is necessary to reverse the direction before stacking the corresponding carrier plate 01. By changing the orientation of the carrier plate 01, the printed image and text of the target printed product are oriented in the preset direction, and confusion of the image and text will not be caused during the second printing. It can be understood that in this embodiment, the first reversing conveyor 23 and the two first conveyors 22 are set horizontally. When the first reversing conveyor 23 is reversed, there is no need to lift the second conveyor 24 before reversing.

[0078] In this embodiment, the second conveyor 24 includes but is not limited to a belt conveyor and a chain conveyor, and the rotation drive unit 25 includes but is not limited to a rotation reducer.

[0079] In order to realize the stacking of the carrier plates 01 conveyed by the loading mechanism 200 and output and transport the stacked carrier plates 01 to the oven mechanism 400, refer to Figure 6 、 Figure 8 In one embodiment, the stacking conveying mechanism 300 includes a first pushing assembly 31, a lifting stacking assembly 32 and a third conveyor 33, wherein:

[0080] The first pushing assembly 31 is arranged on the first conveyor 22 near the output end of the loading mechanism 200, and includes a first slide 311 and a first push rod 312. The first slide 311 is transmission-connected to the first push rod 312 and is used to drive the first push rod 312 to move toward the lifting and stacking assembly 32, so that the first push rod 312 pushes the carrier plate conveyed to the empty material frame into place.

[0081] In this embodiment, the loading mechanism 200 transports the carrier plate 01 to the corresponding material frame. Because the carrier plate 01 is relatively light or there is a certain resistance on the side of the material frame, when the material frame is output from the loading mechanism 200, the carrier plate 01 cannot be in place, and is pushed up by the first pushing component 31, thereby aligning one end of the carrier plate 01.

[0082] The lifting and stacking assembly 32 is arranged at the docking position with the output end of the feeding mechanism 200, and includes a vertically arranged first screw transmission pair 321. The transmission screws of the two first screw transmission pairs 321 arranged opposite each other and spaced apart are connected by a first synchronous chain 322. The transmission screw of one of the two first screw transmission pairs 321 is also connected to the first drive unit 323. The sliding nut of the first screw transmission pair 321 is also connected to the stacking carrier 324. The stacking carrier 324 is provided with a first material frame conveyor 325, wherein,

[0083] The first drive unit 323 drives the two first screw transmission pairs 321 to drive the stacking carriers 324 and the first material frame conveyor 325 to rise and fall according to a preset step, so that the corresponding first conveyor 22 conveys the carriers piece by piece to the empty material frame on the first material frame conveyor 325.

[0084] In this embodiment, the first driving unit 323 includes but is not limited to a servo motor.

[0085] The first material frame conveyor 325 is used to receive the empty material frames transferred by the material frame transfer mechanism 700 and transfer the first material frames stacked with a preset number of carrier plates to the third conveyor 33 .

[0086] In this embodiment, before the current palletizing is performed, that is, after the first material frame conveyor 325 moves out the previous first material frame, the material frame transfer mechanism 700 conveys the corresponding empty material frame to the docking position with the first material frame conveyor 325, and the first material frame conveyor 325 takes over and conveys the corresponding empty material frame to perform palletizing and stacking of the carrier plate 01; in this embodiment, the first material frame conveyor 325 includes but is not limited to a synchronous belt conveyor and a chain conveyor.

[0087] The third conveyor 33 is docked with the lifting and stacking assembly 32 and a first reversing assembly 41 of the oven mechanism 400 , respectively, and is used to transfer the first material frame to the first reversing assembly 41 .

[0088] In this embodiment, after the first material frame conveyor 325 outputs the first material frame therefrom, the first material frame also needs to be conveyed by the third conveyor 33 and then conveyed to the oven mechanism 400. Specifically, the first material frame is conveyed by the third conveyor 33 to the first reversing component 41 connected to the third conveyor 33; in this embodiment, the third conveyor 33 includes but is not limited to a synchronous belt conveyor and a chain conveyor arranged on the corresponding frame.

[0089] In order to achieve the drying and transmission of the target printed matter, refer to Figure 6 and Figure 9 In some embodiments, the oven mechanism 400 further includes a plurality of ovens 42 connected in sequence along the extension direction of the oven mechanism 400. The ovens 42 located at the front and rear ends of the extension direction of the oven mechanism 400 are respectively connected to a first reversing assembly 41. The drying passages of the plurality of ovens 42 are connected to form a drying channel 401. A first chain conveyor 43 is provided at the bottom of each oven 42 in the drying channel 401.

[0090] The first reversing assembly 41 includes a second frame 411, a roller conveyor 412, a fourth lifting drive unit 413 and a second chain conveyor 414. The second chain conveyor 414 is arranged on the second frame 411 and is flush with the corresponding first chain conveyor 43. The fourth lifting drive unit 413 is fixed to the second frame 411 and is in transmission connection with the roller conveyor 412 movably embedded in the second chain conveyor 414. The fourth lifting drive unit 413 drives the roller conveyor 412 to move vertically so that the roller conveyor 412 is correspondingly docked with the third conveyor 33, the second chain conveyor 414 and the fourth conveyor 51, so that the first material frame output from the stacking conveying mechanism 300 is transported to the corresponding first chain conveyor 43, and the second material frame output from the corresponding oven 42 is transported to the fourth conveyor 51.

[0091] In this embodiment, the fourth lifting drive unit 413 includes but is not limited to a driving cylinder, a linear motor, and a ball screw slide module.

[0092] In this embodiment, the first reversing assembly 41 provided between the stacking conveying mechanism 300 and the oven mechanism 400 is used to transfer the first material frame output from the third conveyor 33 to the corresponding first reversing assembly 41, and rotate the conveying direction of the first material frame by 90 degrees, thereby converting the first material frame from moving along the feeding direction of the third conveyor 33 to moving along the extension direction of the drying channel 401 of the oven mechanism 400; in this embodiment, the first reversing assembly 41 provided between the stacking conveying mechanism 300 and the cooling conveying mechanism 400 is used to transfer the first material frame output from the third conveyor 33 to the corresponding first reversing assembly 41, and rotate the conveying direction of the first material frame by 90 degrees, thereby converting the first material frame from moving along the feeding direction of the third conveyor 33 to moving along the extension direction of the drying channel 401 of the oven mechanism 400; The second material frame is transmitted to the corresponding first reversing component 41, and the conveying direction of the first material frame is rotated 90° again, so that the second material frame is converted from an extension direction parallel to the oven mechanism 400 to an extension direction perpendicular to the oven mechanism 400, so that the second material frame is conveyed toward the cooling conveying mechanism 500; in this embodiment, when the first material frame carries the corresponding carrier plate 01 into the oven mechanism 400, the side box door at the docking point of the first reversing component 41 corresponding to the third conveyor 33 and the cooling conveying mechanism 500 is closed, thereby forming a closed drying chamber, thereby improving the drying effect and efficiency.

[0093] Multiple first chain conveyors 43 are used to transport the first material frame conveyed by a corresponding first reversing component 41 to another first reversing component 41, so that the first material frame drives the corresponding carrier plate 01 and the target printed product to flow through the drying channel 401 and dry the target printed product.

[0094] In order to achieve the transmission and cooling of the target printed product after drying, refer to Figure 6 、 Figure 8 and Figure 10 In one embodiment, the cooling conveying mechanism 500 includes a fourth conveyor 51 docked with the first reversing component 41 located on the other side of the oven mechanism 400, and the fourth conveyor 51 is used to transfer the second material frame carrying the dried target printed product conveyed by the corresponding first reversing component 41 to the material separation conveying mechanism 600, wherein, while the second material frame is being conveyed by the fourth conveyor 51, the target printed product on the carrier plate 01 in the second material frame is air-cooled.

[0095] In order to realize the separation of the carrier plates 01 which have been cooled and stacked in the corresponding material frame, at least the target printed products are transported piece by piece to the screen printing machine 100 for printing, refer to Figure 6 and Figure 10 In one embodiment, the material distribution and conveying mechanism 600 includes a second material pushing component 61, a lifting material distribution component 62 and a fifth conveyor 63, wherein,

[0096] The second pushing assembly 61 is arranged on the cooling conveying mechanism 500, and includes a second slide 611 and a second push rod 612. The second slide 611 is transmission-connected to the second push rod 612 and is used to drive the second push rod 612 to move toward the lifting and dividing assembly 62, so that the second push rod 612 pushes the carrier plates 01 located in the second material frame one by one to the fifth conveyor 63.

[0097] The lifting and distributing component 62 is arranged at the docking position with the output end of the fifth conveyor 63, and includes a second screw transmission pair 621 arranged vertically. The transmission screws of the two second screw transmission pairs 621 arranged opposite to each other and spaced apart are connected by a second synchronous chain 622. The transmission screw of one of the two second screw transmission pairs 621 is also connected to the second drive unit 623. The sliding nut of the second screw transmission pair 621 is also connected to the distribution carrier 624. The distribution carrier 624 is provided with a second material frame conveyor 625, wherein,

[0098] The second driving unit 623 drives the two second screw transmission pairs 621 to drive the material distribution carrier 624 and the second material frame conveyor 625 to rise and fall according to the preset steps, so that the second push rod 612 pushes out the carriers in the second material frame one by one.

[0099] In this embodiment, the second driving unit 623 includes but is not limited to a servo motor.

[0100] The second material frame conveyor 625 is used to receive the second material frame transmitted by the cooling conveying mechanism 500 and transfer the empty material frame after material separation to a docking position with the material frame transfer mechanism 700.

[0101] In this embodiment, the second material frame conveyor 625 includes but is not limited to a synchronous belt conveyor and a chain conveyor.

[0102] The fifth conveyor 63 is used to convey the carrier plate pushed out by the second pushing assembly 61 and the target printed product that has completed the drying to the docking point with the transfer and loading assembly 14, wherein the fifth conveyor 63 includes one of the following: a synchronous belt conveyor and a chain conveyor.

[0103] In order to realize the transfer of the empty material frame so that the stacking conveying mechanism 300 can circulate the stacking carrier 01, refer to Figure 6 and Figure 11In one embodiment, the material frame transfer mechanism 700 includes a gantry 71, a linear guide rail 72 is provided on the truss of the gantry 71, and a sliding frame 73 that can slide along the linear guide rail 72 is hung on the linear guide rail 72. The sliding frame 83 is also connected to the driving motor 76 fixed to the gantry 71 through a follower block 84 and a transmission belt 85. The sliding frame 73 is also provided with a driving cylinder 78 that is connected to the clamp gripper 77. The clamp gripper 77 is also movably connected to the sliding frame 73 through a guide column and guide sleeve 79. The driving motor 76 drives the sliding frame 73 to drive the clamp gripper 77 to slide along the linear guide rail 72, and cooperates with the driving cylinder 78 to drive the clamp gripper 77 to rise and fall, so that the clamp gripper 87 clamps the empty material frame from the docking position with the second material frame conveyor 625 and transfers it to the stacking conveying mechanism 300.

[0104] In this embodiment, a corresponding material frame conveyor (not numbered in the drawing) is further provided at a position opposite to the second material frame conveyor 625 of the cooling conveying mechanism 500 and the material distribution conveying mechanism 600 (on the upper part of the second pushing assembly 61), through which the empty material frame is conveyed to the bottom of the clamp gripper 77, so as to facilitate the clamp gripper 77 to quickly and effectively grasp the empty material frame; at the same time, a corresponding material frame conveyor is also provided at a position of the gantry 71 close to the stacking conveying mechanism 300, and after the empty material frame is transferred to the material frame conveyor, it is conveyed to the first material frame conveyor 325 of the stacking conveying mechanism 300 through the material frame conveyor.

[0105] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments fall within the scope of protection claimed by the present invention.

Claims

1. A screen printing machine, characterized in that: The machine comprises a platform (11), wherein a turntable assembly (12) is provided on the platform (11), wherein the turntable assembly (12) is capable of driving a plurality of vacuum adsorption discharge tables (13) arranged in a circumferential array, cyclically rotating between a loading station, a printing station and a unloading station, and sequentially docking with a transfer loading assembly (14), a printing assembly (15) and a transfer unloading assembly (16) arranged on the circumferential side of the turntable assembly (12), wherein a positioning assembly (17) is further provided at the loading station, wherein: The transfer loading component (14) is used to transfer the carrier plate carrying the target printed product to the vacuum adsorption unloading table (13) located at the loading station, wherein the target printed product includes one of the following: a product to be printed, or a printed product that has been printed at least once; The positioning component (17) is used to perform position correction on the carrier plate on the vacuum adsorption unloading table (13) located at the loading station; The printing assembly (15) is used to perform screen printing on the target printed product on the carrier plate located at the printing station; The transfer and unloading component (16) is used to remove the carrier plate carrying the target printed product that has completed the target number of prints from the vacuum adsorption unloading table (13) located at the unloading station.

2. The screen printing machine according to claim 1, characterized in that The printing assembly (15) includes a lifting base (151), the lifting base (151) is movably connected to the machine (11) through a telescopic guide rod (152), and is transmission-connected to a first lifting drive unit (153) provided on the machine (11), the lifting base (151) is connected to a screen frame support frame (155) through a pull rod (154), and the screen frame support frame (155) is located directly above the printing station, and a transverse drive unit (156) is provided on the side wall of the lifting base (151), and the transverse drive unit (156) is transmission-connected to a scraper bracket (157), and the scraper bracket (157) is also connected to a printing scraper (158) and an ink return knife (159), wherein, Before the turntable assembly (12) drives the plurality of vacuum adsorption discharge tables (13) to rotate, the first lifting drive unit (153) is used to drive the lifting base (151) to drive the screen frame support frame (155), the scraper bracket (157), the printing scraper (158) and the ink return knife (159) to rise to a preset position directly above the printing station, and when the target printed product moves to the printing station along with the corresponding vacuum adsorption discharge table (13), the first lifting drive unit (153) is used to drive the screen frame support frame (155) to drive the screen frame to be placed on the target printed product; The transverse driving unit (156) is used to drive the scraper support (157) to drive the printing scraper (158) and the ink return knife (159) to move along the screen frame after the screen frame is placed on the target printed product, so as to perform screen printing on the target printed product.

3. The screen printing machine according to claim 1, characterized in that The loading and unloading assembly (14) and the unloading and loading assembly (16) both include a support frame (161) fixedly connected to the machine platform (11), two transverse transmission units (162) are provided on the truss arm of the support frame (161), and a suction cup gripper (165) is provided on the slide (163) of each transverse transmission unit (162) and is connected to the second lifting drive unit (164) in a transmission manner, wherein the two transverse transmission units (162) are used to transmit the two corresponding slides. The plate (163) drives the corresponding suction cup gripper (165) to move horizontally alternately, and cooperates with the second lifting drive unit (164) to drive the suction cup gripper (165) to move vertically, so that the suction cup gripper (165) transfers the carrier plate carrying the target printed product to the vacuum adsorption discharge table (13) located at the loading station or removes the carrier plate carrying the target printed product that has completed the target number of prints from the vacuum adsorption discharge table (13) located at the unloading station.

4. The screen printing machine according to claim 1, characterized in that: The turntable assembly (12) includes a turntable (121), a turntable shaft (122), a rotary drive motor and a vacuum unit (123), wherein the rotary drive motor is arranged on the machine (11), the rotary drive motor is connected to the turntable shaft (122), and the turntable shaft (122) is also connected to the turntable (121), and a plurality of vacuum units (123) are provided on the turntable (121), and the vacuum units (123) are respectively connected to the corresponding vacuum adsorption discharge tables (13) and vacuum pumps in an airtight manner, wherein the rotary drive motor drives the turntable (121) through the turntable shaft (122), driving the plurality of vacuum adsorption discharge tables (13) to rotate cyclically, and the vacuum pump cooperates with the vacuum unit (123) so that each vacuum adsorption discharge table (13) adsorbs the corresponding carrier plate; and / or, The positioning assembly (17) includes a support plate (171), a third lifting drive unit (172), a movable calibration device (173) and a fixed calibration device (174). The third lifting drive unit (172) is fixedly connected to the machine platform (11) and is transmission-connected to the support plate (171). The support plate (171) is located below the turntable (121) in the setting position. The support plate (171) is provided with three movable calibration devices (173) and three fixed calibration devices (174) that pass through the turntable (121) and extend out. The three movable calibration devices (173) are located at positions close to the three top corners of the support plate (171) in the setting position. Two of the three movable positioning devices (173) are also configured to be driven by a synchronous belt module (175) to move along the width direction of the pallet (171), and another movable positioning device (173) is configured to be driven by a corresponding synchronous belt module (175) to move along the length direction of the pallet (171). Two of the three fixed positioning devices (174) are respectively arranged on two sides of another vertex of the pallet (171), and another fixed positioning device (174) is arranged at a position close to the movable positioning device (173) that moves along the length direction of the pallet (171), and is respectively arranged on two sides of the corresponding vertex.

5. A circulating screen printing line, characterized in that: The screen printing machine (100) comprises the screen printing machine (100) according to any one of claims 1 to 4, and further comprises a loading mechanism (200), a stacking conveying mechanism (300), an oven mechanism (400), a cooling conveying mechanism (500) and a material distribution conveying mechanism (600) arranged in sequence, wherein the loading and unloading component (14) and the unloading and unloading component (16) of the screen printing machine (100) are respectively docked with the material distribution conveying mechanism (600) and the loading mechanism (200), and a material frame loading mechanism (700) is further provided between the stacking conveying mechanism (300) and the material distribution conveying mechanism (600), wherein: The loading mechanism (200) is used to transport the carrier plates carrying the target printed products piece by piece to the empty material frame located on the stacking conveying mechanism (300), wherein the carrier plates removed from the unloading station by the transfer unloading component (16) carry printed products that have completed at least one printing; The stacking conveying mechanism (300) is used to stack the carrier plates into an empty material frame, and to transfer the first material frame containing a preset number of stacked carrier plates to the oven mechanism (400); The drying oven mechanism (400) is used to transfer the first material frame to the cooling conveying mechanism (500), and to dry the target printed product located on the corresponding carrier during the transfer process; The cooling conveying mechanism (500) is used to convey the second material frame carrying the dried target printed product to the material separation conveying mechanism (600), and to cool the dried target printed product during the conveying process; The material distribution and conveying mechanism (600) is used to push out the carrier plates located in the second material frame piece by piece, and convey the pushed out carrier plates together with the target printed products that have completed the drying process to the docking point with the transfer and loading assembly (14); and after all the carrier plates are pushed out, convey the corresponding empty material frame to the material frame transfer mechanism (700), so that the empty material frame can be transferred to the stacking conveying mechanism (300) through the material frame transfer mechanism (700).

6. The circulating screen printing line according to claim 5, characterized in that: The loading mechanism (200) comprises a first frame (21), two first conveyors (22) are sequentially arranged on the first frame (21) along the conveying direction, and a first reversing conveyor (23) is further arranged between the two first conveyors (22), wherein: One of the two first conveyors (22) receives a carrier plate carrying a corresponding target printed product and transfers the corresponding carrier plate to the first reversing conveyor (23); the other first conveyor (22) receives the carrier plates output by the first reversing conveyor (23) and transfers the carrier plates piece by piece to an empty material frame located on the stacking conveying mechanism (300); The first reversing conveyor (23) includes a second conveyor (24) and a rotation drive unit (25) connected to the second conveyor (24). The rotation drive unit (25) is fixed on the first frame (21). The rotation drive unit (25) is used to drive the second conveyor (24) to carry the carrier plate transported by one of the two first conveyors (22) to perform reversing rotation, and after the reversing rotation, the corresponding carrier plate is transferred to the other first conveyor (22).

7. The circulating screen printing line according to claim 6, characterized in that: The stacking conveying mechanism (300) comprises a first pushing assembly (31), a lifting stacking assembly (32) and a third conveyor (33), wherein the first pushing assembly (31) is arranged on the first conveyor (22) near the output end of the loading mechanism (200), and comprises a first slide (311) and a first push rod (312), wherein the first slide (311) is in transmission connection with the first push rod (312) and is used to drive the first push rod (312) toward the lifting stacking assembly (32). The component (32) moves so that the first push rod (312) pushes the carrier plate that has been transported to the empty material frame into place; the lifting and stacking component (32) is arranged at a position connected to the output end of the feeding mechanism (200), including a vertically arranged first screw transmission pair (321), two transmission screws of the first screw transmission pairs (321) arranged opposite to each other and spaced apart are connected by a first synchronous chain (322), and the transmission screw of one of the two first screw transmission pairs (321) is also connected to the first drive The first drive unit (323) is connected to the stacking carrier (324) by transmission, and the sliding nut of the first screw transmission pair (321) is also connected to the stacking carrier (324). The stacking carrier (324) is provided with a first material frame conveyor (325), wherein the first drive unit (323) drives the two first screw transmission pairs (321) to drive the stacking carrier (324) and the first material frame conveyor (325) to rise and fall according to a preset step, so that the corresponding first conveyor (22) conveys the carriers one by one to the position where the stacking carrier (324) is located. The first material frame conveyor (325) is used to receive the empty material frame transferred by the material frame transfer mechanism (700) and transfer the first material frame stacked with a preset number of carrier plates to the third conveyor (33); the third conveyor (33) is respectively connected to the lifting and stacking component (32) and a first reversing component (41) of the oven mechanism (400), and is used to transfer the first material frame to the first reversing component (41); and / or, The cooling conveying mechanism (500) includes a fourth conveyor (51) docked with the first reversing component (41) located on the other side of the oven mechanism (400), and the fourth conveyor (51) is used to transfer the second material frame carrying the dried target printed matter conveyed by the corresponding first reversing component (41) to the material separation conveying mechanism (600), wherein, while the second material frame is being conveyed by the fourth conveyor (51), the target printed matter on the carrier plate in the second material frame is air-cooled.

8. The circulating screen printing line according to claim 7, characterized in that: The oven mechanism (400) further comprises a plurality of ovens (42) connected in sequence along the extension direction of the oven mechanism (400), the ovens (42) located at the front and rear ends of the extension direction of the oven mechanism (400) are connected to one of the first reversing assemblies (41), the drying passages of the plurality of ovens (42) are connected to form a drying channel (401), and a first chain conveyor (43) is provided at the bottom of each oven (42) in the drying channel (401), wherein: The first reversing assembly (41) includes a second frame (411), a roller conveyor (412), a fourth lifting drive unit (413) and a second chain conveyor (414). The second chain conveyor (414) is arranged on the second frame (411) and is aligned with the corresponding first chain conveyor (43). The fourth lifting drive unit (413) is fixed to the second frame (411) and is connected to the roller conveyor (412) movably embedded in the second chain conveyor (414). 2) Transmission connection, the fourth lifting drive unit (413) drives the roller conveyor (412) to move vertically, so that the roller conveyor (412) is docked with the third conveyor (33), the second chain conveyor (414) and the fourth conveyor (51) respectively, so that the first material frame output from the stacking conveying mechanism (300) is transported to the corresponding first chain conveyor (43), and the second material frame output from the corresponding oven (42) is transported to the fourth conveyor (51); The plurality of first chain conveyors (43) are used to convey the first material frame conveyed by a corresponding first reversing assembly (41) to another first reversing assembly (41), so that the first material frame drives the corresponding carrier plate and target printed matter to flow through the drying channel (401) and dry the target printed matter.

9. The circulating screen printing line according to claim 5, characterized in that The material distribution and conveying mechanism (600) comprises a second material pushing assembly (61), a lifting material distribution assembly (62) and a fifth conveyor (63), wherein: The second pushing assembly (61) is arranged on the cooling conveying mechanism (500), and includes a second slide (611) and a second push rod (612). The second slide (611) is connected to the second push rod (612) by transmission, and is used to drive the second push rod (612) to move toward the lifting and distributing assembly (62), so that the second push rod (612) pushes the carrier plates located in the second material frame to the fifth conveyor (63) piece by piece. The lifting and distributing component (62) is arranged at a position docking with the output end of the fifth conveyor (63), and includes a second screw transmission pair (621) arranged vertically, and the transmission screws of the two second screw transmission pairs (621) arranged opposite to each other and spaced apart are connected by a second synchronous chain (622), and the transmission screw of one of the two second screw transmission pairs (621) is also connected by a second driving unit (623), and the sliding nut of the second screw transmission pair (621) is also connected to the distributing carrier plate (624), and the distributing carrier plate (624) is connected to the second driving unit (623). ) is provided with a second material frame conveyor (625), wherein the second drive unit (623) drives the two second screw transmission pairs (621) to drive the material distribution carrier (624) and the second material frame conveyor (625) to rise and fall according to a preset step, so that the second push rod (612) pushes out the carriers located in the second material frame piece by piece; the second material frame conveyor (625) is used to receive the second material frame transmitted by the cooling conveying mechanism (500) and transfer the empty material frame after distribution to the docking position with the material frame transfer mechanism (700); The fifth conveyor (63) is used to convey the carrier plate pushed out by the second pushing assembly (61) and the target printed product that has completed the drying process to the docking point with the transfer and loading assembly (14), wherein the fifth conveyor (63) includes one of the following: a synchronous belt conveyor and a chain conveyor.

10. The circulating screen printing line according to claim 9, characterized in that The material frame transfer mechanism (700) includes a gantry (71), a linear guide rail (72) is provided on the truss of the gantry (71), a sliding frame (73) is hung on the linear guide rail (72) and can slide along the linear guide rail (72), the sliding frame (73) is also connected to the driving motor (76) fixed on the gantry (71) through a follower block (74) and a transmission belt (75), and the sliding frame (73) is also provided with a driving cylinder connected to the clamp gripper (77). (78), the clamp gripper (77) is also movably connected to the sliding frame (73) through the guide column and guide sleeve (79), and the driving motor (76) drives the sliding frame (73) to drive the clamp gripper (77) to slide along the linear guide rail (72), and cooperates with the driving cylinder (78) to drive the clamp gripper (77) to rise and fall, so that the clamp gripper (77) clamps the empty material frame from the docking position with the second material frame conveyor (625) and transfers it to the stacking conveying mechanism (300).

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