A chess screen printing assembly machine

Abstract

This invention relates to the field of chess production equipment, and in particular to a chess screen printing assembly machine, which mainly includes a chess assembly mechanism, screen printing fixtures, and UV machine fixtures. The chess assembly mechanism is assembled on the frame, and the automatic transfer of materials between various processing mechanisms is realized through a conveyor belt, a carrying tray circulation mechanism, and a material transfer mechanism. This invention realizes the fully automated production of traditional Chinese chess, improves the production efficiency of chess through automated equipment, reduces the dependence on manual labor in the production process, and helps to reduce the production cost of chess.

Description

Technical Field

[0001] This invention relates to the field of chess production equipment, and in particular to a chess screen printing assembly machine. Background Technology

[0002] Chess appeared as early as the Zhou Dynasty (11th century BC). Traditional chess pieces were usually made by hand, which was inefficient. A Chinese invention patent with patent application number CN201611189121.0, entitled "Automatic Assembly Line for Chess Pieces with Magnet Glue Dispensing," discloses an automated equipment for producing chess pieces. The main difference between chess pieces and traditional Chinese chess pieces lies in their shape. The main assembly method of the two types of pieces is the same. The production process of traditional chess pieces includes attaching magnets, assembling the pieces, coloring the characters on the pieces, and finally, protecting the surface of the pieces. The equipment disclosed in the aforementioned invention patent can only complete the attachment of magnets and the assembly of the pieces. The subsequent coloring and surface treatment need to be carried out by other independent equipment. The subsequent transfer and loading / unloading processes need to be done manually, which is highly dependent on manual labor and is not conducive to reducing production costs and improving production efficiency. Summary of the Invention

[0003] This invention proposes a chess screen printing assembly machine, which realizes the automated production of traditional chess pieces, improves the production efficiency of traditional chess pieces, and reduces the dependence on manual labor.

[0004] The technical solution adopted in this invention is: a chess screen printing assembly machine, comprising,

[0005] A frame used to support equipment;

[0006] A carrying tray for transporting chess pieces, the carrying tray having several carrying positions;

[0007] A turntable that can rotate relative to the frame, and a number of processing positions are fixed on the turntable;

[0008] A conveying mechanism located on one side of the frame includes an input conveyor belt for inputting the carrier tray and an output conveyor belt for outputting the carrier tray. A carrier tray circulation mechanism is provided between the input conveyor belt and the output conveyor belt, and an intermediate clearance cavity is provided inside the output conveyor belt.

[0009] A screen printing fixture for coloring is provided at the initial end of the output conveyor belt. A lifting mechanism is provided directly below the screen printing fixture. The lifting mechanism is located below the intermediate clearance cavity. The lifting mechanism includes a lifting base, a lifting rod, and a positioning mechanism. The lifting rod is telescopic relative to the lifting base. The positioning mechanism is fixed above the lifting rod.

[0010] A UV curing machine fixture for curing ink is provided at the end of the output conveyor belt. The inlet of the UV curing machine fixture is connected to the end of the output conveyor belt, and the outlet of the UV curing machine fixture is connected to the beginning of the input conveyor belt.

[0011] Assembly mechanism for assembling chess pieces;

[0012] A material transfer mechanism is provided between the pressing mechanism and the output conveyor belt;

[0013] A feeding mechanism is provided on one side of the initial end of the input conveyor belt.

[0014] Furthermore, the positioning mechanism includes a positioning base plate, a positioning edge on the positioning base plate, and a retractable inverted 'L'-shaped fixing plate on the opposite side of the positioning edge. The inverted 'L'-shaped fixing plate is connected to a positioning cylinder, and the positioning cylinder is fixed to the positioning base plate.

[0015] Furthermore, the assembly mechanism includes a chessboard feeding mechanism, a magnet feeding mechanism, a chessboard cover feeding mechanism, and a pressing mechanism. The chessboard feeding mechanism, the magnet feeding mechanism, the chessboard cover feeding mechanism, and the pressing mechanism are located on the periphery of the turntable and are arranged sequentially along the rotation direction of the turntable.

[0016] Furthermore, the output conveyor belt includes two parallel narrow conveyor belts, the intermediate clearance cavity is formed between the two narrow conveyor belts, the ends of the narrow conveyor belts are provided with conveyor wheels, the two conveyor wheels at the same end are fixed on a fixed rod, an output drive motor is fixed below the output conveyor belt, and a belt drive mechanism is provided between the output drive motor and the fixed rod.

[0017] Furthermore, the chessboard feeding mechanism includes a row of vibrating discs, a conveying track connected to the outside of the row of vibrating discs, a material passage inside the conveying track, a display seat at the end of the conveying track, a liftable lifting boss above the display seat, the lifting boss being slidably connected to a transverse base plate, a number of fixed columns between the transverse base plate and the frame, and a number of fixed transfer suction cups on the lifting boss.

[0018] Furthermore, the pressing mechanism includes two side plates and a top plate. The top plate is fixed above the side plates and has a telescopic hole. A pressing cylinder with an output shaft is fixed on the top plate. The output shaft of the pressing cylinder is located in the telescopic hole, and a pressing panel is provided at the end of the output shaft.

[0019] Furthermore, the material transfer mechanism includes a material transfer base, a transmission screw rotatably connected to the material transfer base, a drive motor fixed to one end of the material transfer base, the transmission screw fixedly connected to the drive motor, a screw nut sleeved on the transmission screw, a lifting cylinder fixed on the screw nut, a material transfer fixing plate fixed on the telescopic shaft of the lifting cylinder, and a plurality of material transfer suction cups provided on the material transfer fixing plate.

[0020] Furthermore, the bearing plate circulation mechanism includes a circulation base, on which a lead screw transmission mechanism is provided. Above the lead screw transmission mechanism is a fixed plate, on which a plurality of limiting edges are provided. The limiting edges wrap around to form a rectangular frame with an opening, and the opening is located near the end of the input conveyor belt.

[0021] Furthermore, the unloading mechanism includes an unloading conveyor belt, a chess piece transfer mechanism is provided between the unloading conveyor belt and the input conveyor belt, the unloading conveyor belt is provided with a plurality of evenly spaced partitions, an unloading drive motor is provided at one end of the unloading conveyor belt, a rotating roller is provided at the end of the unloading conveyor belt, and a transmission gearbox is provided between the unloading drive motor and one of the rotating rollers.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention connects the chess assembly mechanism and subsequent coloring and oil film curing in a production line, thereby achieving fully automated production of traditional Chinese chess. Material transfer between each processing step is achieved by automated equipment, thus reducing reliance on manual labor and improving chess production efficiency through automation, thereby significantly reducing chess production costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the chessboard loading mechanism of the present invention;

[0027] Figure 3 This is a schematic diagram of the pressing mechanism of the present invention;

[0028] Figure 4This is a schematic diagram of the bearing disk circulation mechanism and material transfer mechanism of the present invention;

[0029] Figure 5 This is a schematic diagram of the output conveyor belt structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the lifting mechanism structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the feeding mechanism of the present invention;

[0032] Figure 8 This is an enlarged structural diagram of part A of the present invention;

[0033] The invention reference information is as follows:

[0034] Frame; 11. Carrying plate; 12. Turntable; 20. Input conveyor belt; 21. Intermediate clearance cavity; 22. Narrow conveyor belt; 221. Conveyor wheel; 222. Fixing rod; 223. Output drive motor; 224. Belt drive mechanism; 30. Output conveyor belt; 40. Screen printing fixture; 41. Lifting mechanism; 411. Lifting base; 412. Lifting rod; 413. Positioning mechanism; 4131. Positioning base plate; 4132. Positioning edge; 4133. Inverted 'L' shaped fixing plate; 4134. Positioning cylinder; 50. UV machine fixture; 60. Chess assembly mechanism; 61. Chess table loading mechanism; 611. Alignment vibratory feeder; 612. Conveyor track; 613. Display stand; 614. Lifting mechanism 615. Boss; 616. Horizontal sliding base plate; 617. Fixed column; 618. Transfer suction cup; 62. Magnet feeding mechanism; 63. Chess cover feeding mechanism; 64. Pressing mechanism; 641. Side plate; 642. Top plate; 643. Pressing cylinder; 644. Pressing panel; 70. Transfer mechanism; 71. Transfer machine base; 72. Transmission screw; 73. Drive motor; 74. Screw nut; 75. Lifting cylinder; 76. Transfer fixing plate; 77. Transfer suction cup; 80. Unloading mechanism; 81. Unloading conveyor belt; 82. Chess piece transfer mechanism; 83. Partition plate; 84. Unloading drive motor; 85. Transmission gearbox; 90. Bearing plate circulation mechanism; 91. Circulation machine base; 92. Fixed plate; 93. Limiting edge;

[0035] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0038] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0039] This invention provides a chess-themed screen printing assembly machine, such as... Figure 1 As shown, this equipment includes a frame 10 for supporting the equipment. A rotatable turntable 12 is provided on the frame 10. Several processing positions are fixed on the turntable 12. The processing positions are used to position chess pieces. A conveying mechanism is provided on one side of the frame 10. The conveying mechanism includes two conveyor belts running in opposite directions, specifically including an input conveyor belt 20 and an output conveyor belt 30. A screen printing fixture 40 for coloring is arranged above the output conveyor belt 30. The conveyor belt is used to transfer a carrier tray 11 containing chess pieces. The carrier tray 11 is provided with several carrier positions for positioning and placing chess pieces. A UV machine fixture 50 for curing ink is provided after the screen printing fixture 40. A chess assembly mechanism is also arranged around the turntable 12. A material transfer mechanism 70 is provided between the chess assembly mechanism and the output conveyor belt 30.

[0040] The assembly process of the chess set mainly includes two steps: placing a magnet inside the chess stand and pressing and fixing the chess stand and the chess cover. After the chess set is assembled, it is conveyed to the screen printing fixture 40 by a conveyor belt. The screen printing fixture 40 colors the chess set. After coloring, the chess set is conveyed to the UV machine fixture 50 for ink curing. Finally, the processed chess set is unloaded, thus completing the automated production process of the chess set.

[0041] like Figure 5 As shown, since the carrier tray 11 needs to be lifted during screen printing, a lifting mechanism 41 is provided below the output conveyor belt 30. To avoid interference between the lifting mechanism 41 and the output conveyor belt 30 during the lifting process, the output conveyor belt 30 includes two parallel narrow conveyor belts 22, with a central clearance cavity 21 formed between the two narrow conveyor belts 22. The lifting mechanism 41 is located below the central clearance cavity 21. The distance between the two narrow conveyor belts 22 is preferably slightly greater than or equal to the width of the carrier tray 11. The spacing must ensure that the bearing plate 11 is placed on the surface of the narrow conveyor belt 22 and does not fall off. The end of the narrow conveyor belt 22 is provided with a conveyor wheel 221. The two conveyor wheels 221 at the same end are fixed on a fixed rod 222. An output drive motor 73223 is fixed below the output conveyor belt 30. A belt drive mechanism 224 is provided between the output drive motor 73223 and the fixed rod 222. The belt drive mechanism 224 is existing technology. The drive motor 73 provides power for the operation of the narrow conveyor belt 22.

[0042] The lifting mechanism 41 includes a lifting base 411, a lifting rod 412, and a positioning mechanism 413. The lifting rod 412 is telescopic relative to the lifting base 411. The lifting rod 412 can be a telescopic rod of a cylinder or a straight rod. The telescopic effect is achieved by setting a cylinder. The positioning mechanism 413 is fixed above the lifting rod 412. The positioning mechanism 413 is used to fix the carrier plate 11, thereby ensuring the stability of the screen printing process of the carrier plate 11.

[0043] Limited by the space available for the intermediate clearance cavity 21, the positioning mechanism 413 is arranged along the travel direction of the output conveyor belt 30, specifically as follows: Figure 6 As shown, the positioning mechanism 413 includes a positioning base plate 4131, a positioning edge 4132 on the positioning base plate 4131, and a retractable inverted 'L'-shaped fixing plate 4133 on the opposite side of the positioning edge 4132. The inverted 'L'-shaped fixing plate 4133 is connected to a positioning cylinder 4134, which is fixed to the positioning base plate 4131. The inverted 'L'-shaped fixing plate 4133 moves under the push of the positioning cylinder 4134, thereby laterally pressing and limiting the bearing plate 11 on the positioning base plate 4131. The inverted 'L'-shaped fixing plate 4133 also has the effect of fixing the longitudinal displacement of the bearing plate 11.

[0044] The chess assembly mechanism 60 includes a chess piece feeding mechanism 61, a magnet feeding mechanism 62, a chess cover feeding mechanism 63, and a pressing mechanism 64. The three feeding mechanisms have identical structures. Taking the chess piece feeding mechanism 61 as an example, the aligning vibratory feeder 611 is used to neatly arrange the chess pieces. A conveying track 612 is externally connected to the aligning vibratory feeder 611. A material passage is provided within the conveying track 612, through which the steam-arranged chess pieces are output. A display seat 613 is provided at the end of the conveying track 612, and the output chess pieces are neatly arranged on the display seat 613. A liftable lifting boss 614 is provided above the display seat 613. The lifting boss 614 is slidably connected to a transverse base plate 615. Several fixing columns 616 are provided between the transverse base plate 615 and the frame 10. The transverse base plate 615 is fixed to the frame 10 by the fixing columns 616. On the frame 10, the lifting boss 614 is equipped with several fixed transfer suction cups 617. The transfer suction cups 617 are used to lift the chess pieces on the display seat 613. The lifting boss 614 moves longitudinally and laterally to transfer the lifted chess pieces to the processing position, thus completing the transfer of the chess pieces. The lifting boss 614 includes a base plate and a sliding plate. The sliding plate is slidably connected to the base plate. A cylinder is fixed above the sliding plate. The cylinder controls the lifting and lowering of the sliding plate. The sliding connection can be achieved by a slide rail. Similarly, a slide rail is also provided between the transverse base plate 615 and the lifting boss 614. The transverse movement of the lifting boss 614 is controlled by a cylinder. The working principle of the magnet feeding mechanism 62 and the chess cover feeding mechanism 63 is the same as that of the chess piece feeding mechanism 61. The transfer of materials to the processing position is achieved by the transfer suction cups 617 that can move laterally and longitudinally.

[0045] Meanwhile, in order to make the arrangement of the various assembly stations of the chess pieces more compact, the chess piece base feeding mechanism 61, the magnet feeding mechanism 62, the chess piece cover feeding mechanism 63, and the pressing mechanism 64 in this equipment are arranged around the turntable 12. The positions of the above three feeding mechanisms are arranged sequentially along the rotation direction of the turntable 12, and the materials are transported to the bottom of each assembly mechanism through the turntable 12.

[0046] The present invention addresses the assembly of the chess piece cover and chess stand into one piece through pressing. Specifically, the pressing mechanism 64 includes two side plates 641 and a top plate 642. The top plate 642 is fixed above the side plates 641. The top plate 642 is provided with telescopic holes. A pressing cylinder 643 with an output shaft is fixed on the top plate 642. The output shaft of the pressing cylinder 643 is located in the telescopic holes. The end of the output shaft is provided with a pressing panel 644. The pressing cylinder 643 controls the lifting and lowering of the pressing panel 644, thereby realizing the pressing and fixing of the chess piece stand and the chess piece cover.

[0047] To transfer the assembled chess pieces on the turntable 12 to the next processing station, a transfer mechanism 70 is provided between the pressing mechanism 64 and the output conveyor belt 30. The transfer mechanism 70 includes a transfer base 71. In this embodiment, the transfer base 71 is a long, straight, centrally controlled column. A transmission screw 72 is rotatably connected to the transfer base 71. A drive motor 73 is fixed to one end of the transfer base 71. The transmission screw 72 is fixedly connected to the drive motor 73. A screw thread is sleeved on the transmission screw 72. The mother 74, driven by the drive motor 73, rotates the transmission screw 72, thereby controlling the movement of the screw nut 74 along the long axis of the transfer base 71. A lifting cylinder 75 is fixed to the screw nut 74, and a transfer fixing plate is fixed to the telescopic shaft of the lifting cylinder 75. The transfer fixing plate is equipped with several transfer suction cups, which are used to pick up the assembled chess pieces from the pressing mechanism 64 and control the lifting of the chess pieces via the lifting cylinder 75. The transfer base 71 is oriented as follows... Figure 1 As shown, the lead screw nut 74 drives the lifting cylinder 75 to move laterally, ultimately transferring the assembled chess pieces from the pressing mechanism 64 to the conveyor belt.

[0048] To facilitate the transfer of the carrier tray 11 between the two conveyor belts, this equipment provides a carrier tray 11 circulation mechanism between the input conveyor belt 20 and the output conveyor belt 30. The carrier tray 11 circulation mechanism includes a circulation base 91, which is a long straight column, and its shape can be referenced from that of the material transfer base 71. A screw drive mechanism is provided on the circulation base 91. The working principle of the screw drive mechanism can be referenced from that of the screw drive part in the material transfer mechanism 70. A fixed plate 92 is provided above the screw drive mechanism. An external power source drives the screw drive mechanism to operate, thereby controlling the fixed plate. The movement of 92 achieves the effect of transferring the fixed disk 92 from the carrier disk 11 on the input transmission belt to the output transmission belt. The fixed disk 92 is provided with several limiting edges 93. In this embodiment, the carrier disk 11 is rectangular, and the limiting edges 93 surround it to form a rectangular frame with an opening. The shape formed by the limiting edges 93 corresponds to the carrier disk 11. It should be noted that the opening is located near the end of the input transmission belt 20. Under the push of the input transmission belt 20, the carrier disk 11 enters the enclosure of the limiting edges 93 and is positioned by the limiting edges 93.

[0049] The UV machine fixture 50 is located at the end of the output conveyor belt 30. The UV machine fixture 50 has a running belt inside. Therefore, the length of the output conveyor belt ends at the entrance of the UV machine fixture 50. The exit of the UV machine fixture 50 is connected to the initial end of the input conveyor belt 20. In actual production, the exit of the UV machine fixture 50 is provided with an inclined light plate, which serves the above-mentioned connecting function.

[0050] A feeding mechanism 80 is provided on one side of the initial end of the input conveyor belt 20. The feeding mechanism 80 includes a feeding conveyor belt 81. A chess piece transfer mechanism 82 is provided between the feeding conveyor belt 81 and the input conveyor belt 20. The principle of the chess piece transfer mechanism 82 is the same as that of the transfer mechanism 70. The main difference between the two is the number and arrangement of the transfer suction cups. The chess piece transfer mechanism 82 has more transfer suction cups, and the arrangement of the transfer suction cups corresponds to the chess pieces on the carrying plate 11. The conveyor belt 81 is provided with several evenly spaced partitions 83. The chess pieces transferred by the transfer suction cup are placed between the partitions 83 to ensure the orderly transfer of the chess pieces. One end of the unloading conveyor belt 81 is provided with an unloading drive motor 8473, and the end of the unloading conveyor belt 81 is provided with a rotating roller. A transmission gearbox 85 is provided between the unloading drive motor 8473 and one of the rotating rollers. The driving force of the unloading conveyor belt is input by the unloading drive motor 8473 and transmitted through the transmission gearbox 85.

[0051] See Figure 1 As can be seen, in order to increase production efficiency, the present invention provides two turntables 12, which are respectively located on both sides of the transfer mechanism 70. The matching chess assembly structure is also two sets, and the structural part of the transfer mechanism 70 used for transferring chess pieces is also two sets. The assembly structures on both sides can be assembled simultaneously, thereby increasing the number of chess pieces assembled per unit time.

[0052] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A chess-themed screen printing assembly machine, characterized in that: include A frame used to support equipment; A carrying tray for transporting chess pieces, the carrying tray having several carrying positions; A turntable that can rotate relative to the frame, and a number of processing positions are fixed on the turntable; A conveying mechanism located on one side of the frame includes an input conveyor belt for inputting the carrier tray and an output conveyor belt for outputting the carrier tray. A carrier tray circulation mechanism is provided between the input conveyor belt and the output conveyor belt, and an intermediate clearance cavity is provided inside the output conveyor belt. A screen printing fixture for coloring is provided at the initial end of the output conveyor belt. A lifting mechanism is provided directly below the screen printing fixture. The lifting mechanism is located below the intermediate clearance cavity. The lifting mechanism includes a lifting base, a lifting rod, and a positioning mechanism. The lifting rod is telescopic relative to the lifting base. The positioning mechanism is fixed above the lifting rod. A UV curing machine fixture for curing ink is provided at the end of the output conveyor belt. The inlet of the UV curing machine fixture is connected to the end of the output conveyor belt, and the outlet of the UV curing machine fixture is connected to the beginning of the input conveyor belt. Assembly mechanism for assembling chess pieces; The assembly mechanism includes a chessboard feeding mechanism, a magnet feeding mechanism, a chessboard cover feeding mechanism, and a pressing mechanism. The chessboard feeding mechanism, the magnet feeding mechanism, the chessboard cover feeding mechanism, and the pressing mechanism are located on the periphery of the turntable and are arranged sequentially along the rotation direction of the turntable. A material transfer mechanism is provided between the pressing mechanism and the output conveyor belt; A feeding mechanism is provided on one side of the initial end of the input conveyor belt; The output conveyor belt includes two parallel narrow conveyor belts, the intermediate clearance cavity is formed between the two narrow conveyor belts, the ends of the narrow conveyor belts are provided with conveyor wheels, the two conveyor wheels at the same end are fixed on a fixed rod, an output drive motor is fixed below the output conveyor belt, and a belt drive mechanism is provided between the output drive motor and the fixed rod. The chessboard loading mechanism includes a row of vibrating discs, a conveying track connected to the outside of the row of vibrating discs, a material passage inside the conveying track, a display seat at the end of the conveying track, a liftable lifting boss above the display seat, the lifting boss being slidably connected to a transverse base plate, a number of fixed columns between the transverse base plate and the frame, and a number of fixed transfer suction cups on the lifting boss. The pressing mechanism includes two side plates and a top plate. The top plate is fixed above the side plates. The top plate is provided with a telescopic hole. A pressing cylinder with an output shaft is fixed on the top plate. The output shaft of the pressing cylinder is located in the telescopic hole. The end of the output shaft is provided with a pressing panel. The material transfer mechanism includes a material transfer base, a transmission screw rotatably connected to the material transfer base, a drive motor fixed to one end of the material transfer base, the transmission screw fixedly connected to the drive motor, a screw nut sleeved on the transmission screw, a lifting cylinder fixed on the screw nut, a material transfer fixing plate fixed on the telescopic shaft of the lifting cylinder, and a plurality of material transfer suction cups provided on the material transfer fixing plate; The bearing plate circulation mechanism includes a circulation base, on which a lead screw transmission mechanism is provided. Above the lead screw transmission mechanism is a fixed plate, on which a plurality of limiting edges are provided. The limiting edges wrap around to form a rectangular frame with an opening, the opening being located near the end of the input conveyor belt.

2. The chess-themed screen printing assembly machine according to claim 1, characterized in that: The positioning mechanism includes a positioning base plate, a positioning edge on the positioning base plate, and a retractable inverted 'L'-shaped fixing plate on the opposite side of the positioning edge. The inverted 'L'-shaped fixing plate is connected to a positioning cylinder, and the positioning cylinder is fixed to the positioning base plate.

3. The chess screen printing assembly machine according to claim 1, characterized in that: The unloading mechanism includes an unloading conveyor belt, a chess piece transfer mechanism is provided between the unloading conveyor belt and the input conveyor belt, the unloading conveyor belt is provided with several evenly spaced partitions, an unloading drive motor is provided at one end of the unloading conveyor belt, a rotating roller is provided at the end of the unloading conveyor belt, and a transmission gearbox is provided between the unloading drive motor and one of the rotating rollers.

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