A batch license plate production machine

Abstract

The present invention provides a batch license plate production machine, including a frame, which is connected to a plurality of first lifting mechanisms and a plurality of second lifting mechanisms, each first lifting mechanism is connected to a group of male die groups, each group of male die groups includes a plurality of male modules, each second lifting mechanism is connected to a group of female die groups, each group of female die groups includes a plurality of female modules, a first push plate and a second push plate are slidably connected to the frame, the first push plate is slidably connected to a lifting plate for supporting the male modules, the second push plate is connected to a limiting structure for limiting the female modules, the lifting plate is located below the limiting structure, and the frame is connected to a pressing plate through a power mechanism; after the lifting plate and the limiting structure move toward the direction close to the pressing plate and make the male modules correspond to the female modules, the pressing plate pushes the lifting plate toward the direction close to the limiting structure and makes the blank located between the male modules and the female modules be formed into a license plate, thereby achieving the purpose of reducing the space occupied and improving production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of vehicle license plate production, in particular to a batch license plate production machine. Background Art

[0002] Currently, a Chinese patent with authorization announcement number CN215158945U discloses a license plate production device, which includes: a base, a font library for storing font sets, a font robot for clamping the fonts located above the font library; the font robot is movably mounted on a screw guide rail and can move along the screw guide rail; a font frame for pressing plates is provided in the base, the font frame has a font storage position and a plate storage position, the screw guide rail passes through the top of the font frame, a loading mechanism is provided on the outside of the font frame for feeding the plates into the plate storage position, and a feeding mechanism is provided below the font frame for outputting the plates after being pressed by the font frame. In the present invention, the loading mechanism, feeding mechanism and font robot are respectively provided, so that the work of upper and lower license plate plates and upper and lower fonts can be carried out synchronously, reducing the waiting time between each process and further improving the efficiency of license plate production.

[0003] However, while the aforementioned license plate production equipment has achieved some automation, it still has shortcomings. The patent describes a font set stored in the font library as consisting of two matching font modules. This means that when stored, the two font modules are typically stacked together and stored and retrieved as a single font set.

[0004] While this stacking method facilitates paired management of font sets and robotic gripping, it also causes each font set to occupy a relatively large volume within the font library. As the number of license plate number types (such as 5-digit or 6-digit codes) and the variety of font characters increase, the number of font sets required to be stored in the font library also increases. The larger size of individual fonts undoubtedly significantly increases the overall space required for the font library, potentially limiting equipment design, volume control, and production line layout.

[0005] Furthermore, while existing license plate production equipment can synchronize the various processes of the mold manipulator, loading mechanism, and feeding mechanism, there is still room for further efficiency improvement. Therefore, optimizing the storage method for mold groups to reduce the space occupied by the mold library while further improving production efficiency is a technical problem that needs to be solved in the current license plate production equipment field. Summary of the Invention

[0006] In view of this, an object of the present invention is to provide a batch license plate production machine that reduces the space occupied by the volume while improving production efficiency.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: a batch license plate production machine, including a frame, a plurality of first lifting mechanisms and a plurality of second lifting mechanisms are connected to the frame, each of the first lifting mechanisms is connected to a group of male die groups, each group of male die groups includes a plurality of male modules, each of the second lifting mechanisms is connected to a group of female die groups, each group of female die groups includes a plurality of female modules, a first push plate and a second push plate are slidably connected to the frame, the first push plate is slidably connected to the lifting plate, a card slot for driving the male module to move is opened on the lifting plate, a limiting structure for limiting the female module is connected to the second push plate, the lifting plate is located below the limiting structure, and the frame is connected to a pressing plate through a power mechanism;

[0008] After the lifting plate and the limiting structure move toward the pressing plate and make the male module correspond to the female module, the pressing plate pushes the lifting plate toward the limiting structure and makes the blank between the male module and the female module form a license plate.

[0009] To implement the above technical solution, during operation, the batch license plate production machine uses multiple first and second lifting mechanisms to precisely transport the independent male and female die sets to designated positions. Next, the first push plate drives the lifting plate with the male module, which moves in coordination with the stopper structure on the second push plate to precisely align the selected male and female modules. Subsequently, the power mechanism drives the pressing plate upward, pushing the lifting plate toward the stopper structure, thereby stamping the blank located between the male and female modules and completing the license plate production. By separating the male and female die sets and controlling them with independent lifting mechanisms, the male and female die sets can be managed independently during storage and transport, thus avoiding the excessive space consumption associated with traditional stacked die sets and improving the storage efficiency of the die library and the compactness of the equipment. Furthermore, the parallel and coordinated operation of the multiple lifting mechanisms, as well as the automated coordination of the first, second, and pressing plates, significantly reduces waiting time between processes, thereby improving the overall efficiency and automation level of batch license plate production.

[0010] As a preferred solution of the present invention, the first lifting mechanism includes a first support frame, a second support frame, a first slide and a first power assembly. The first support frame and the second support frame are both fixed on the frame and arranged along the height direction of the frame. The first support frame and the second support frame correspond to each other and there is a first channel for the movement of the lifting plate between the first support frame and the second support frame. The first slide is driven by the first power assembly and slidably connected to the first support frame. The punch group is slidably connected to the first support frame and the second support frame. The first slide pushes the punch group to move along the height direction of the first support frame.

[0011] To implement the above technical solution, the operation of the first lifting mechanism begins with the first power assembly driving the first slide to slide within the first support frame. Because the punch assembly is slidably connected between the first and second support frames, the movement of the first slide forces the corresponding punch assembly to rise and fall along the height of the first and second support frames. This lifting action allows the selected punch module in the punch assembly to be precisely moved into the first channel and aligned with the lifting plate. Subsequently, the first push plate moves, removing the lifting plate from the first channel and driving the selected punch module toward the press plate. At this point, the lifting plate stops between the press plate and the second support frame, allowing the blank to be accurately placed above the punch module. The first push plate then continues moving, ultimately positioning the lifting plate directly above the press plate, ready for subsequent pressing operations. This ensures stable and precise vertical lifting and horizontal displacement of the punch module. This ensures that the punch module can be accurately removed from its storage location, moved to the pressing station, and positioned in coordination with the lifting plate, further ensuring precise placement of the blank on the punch module. In addition, this structured continuous motion process significantly improves the efficiency of picking, placing and positioning the convex modules, reduces manual intervention, and thus improves the automation level and overall production efficiency of license plate batch production.

[0012] As a preferred solution of the present invention, the first power assembly includes a first motor, a first polished rod and a first screw, the first motor and the first polished rod are fixed on a frame, the first screw is rotatably connected to the frame, the axis of the first polished rod is parallel to the axis of the first screw, the first motor drives the first screw to rotate, and the first slide is slidably connected to the first polished rod and is threadedly connected to the first screw.

[0013] To implement the above technical solution, when the first motor starts and drives the first screw to rotate, the first slide, connected to the first screw by a threaded connection and simultaneously slidably connected to the first polished rod as a guide, will move precisely and smoothly in a straight line parallel to the axis of the first polished rod and the first screw. Powered by the first motor, combined with the rotation of the first screw and the guidance of the first polished rod, the first slide provides stable, highly precise, and controllable linear reciprocating motion, ensuring that the punch assembly it pushes can be accurately raised and positioned, significantly improving the accuracy and reliability of the mold transfer and positioning during license plate production.

[0014] As a preferred solution of the present invention, an anti-slip plate is fixedly connected to the first push plate, a displacement groove is provided on the side wall of the lifting plate along its own height direction, and a displacement wheel is connected to the anti-slip plate, and the displacement wheel is located in the displacement groove.

[0015] To implement the above technical solution, in a batch license plate production machine, when the blank needs to be stamped, the power mechanism first drives the pressure plate upward. The pressure plate then pushes the lifting plate toward the concave module. During this process, the lifting plate moves upward, and the displacement groove and the displacement wheel move relative to each other. After the blank is stamped and formed, the power mechanism drives the pressure plate downward, and the displacement groove moves downward along the displacement wheel, thereby driving the lifting plate to smoothly return to its original position downward. This upward and downward movement of the pressure plate and the coordination of the displacement wheel in the displacement groove achieve precise vertical positioning and smooth lifting of the lifting plate before and after pressing. In particular, when the pressure plate moves downward, the displacement wheel and the inner wall of the displacement groove roll relative to each other, effectively avoiding the lifting plate from getting stuck during the descent process and ensuring the smoothness and reliability of its movement. This not only improves the smoothness of the entire pressing cycle and reduces the equipment failure rate, but also ensures the continuity and efficiency of the license plate production process.

[0016] As a preferred solution of the present invention, the second lifting mechanism includes a third support frame, a fourth support frame, a second slide and a second power assembly, the third support frame and the fourth support frame are both fixed on the frame and arranged along the height direction of the frame, the third support frame and the fourth support frame are arranged correspondingly, and a second channel for a limiting structure to pass through is formed between the third support frame and the fourth support frame, the die group is slidably connected to the third support frame and the fourth support frame, the second slide is driven by the second power assembly and slidably connected to the third support frame, and the second slide pushes the die group to move along the height direction of the third support frame.

[0017] To implement the above technical solution, when the second lifting mechanism is in operation, the second power assembly drives the second slide to slide vertically within the third support frame. Because the die assembly is slidably connected between the third and fourth support frames, the movement of the second slide causes the die assembly to rise and fall vertically, along the height of the third and fourth support frames. This lifting mechanism allows the selected die blocks in the die assembly to be precisely moved and positioned within the second channel. Subsequently, when the second push plate moves, the limiting structure simultaneously drives all selected die blocks to move synchronously, ultimately precisely positioning them directly above the blank, ready for subsequent stamping operations. This ensures that the die blocks can be accurately retrieved from their storage locations and uniformly moved above the pressing plate, achieving precise alignment with the blank, thereby ensuring stamping quality. Furthermore, the limiting structure simultaneously drives the movement of all selected die blocks, significantly improving the efficiency of batch transport and positioning of the die blocks, reducing operation time and further enhancing the automation level and production efficiency of the entire license plate production equipment.

[0018] As a preferred solution of the present invention, the second power assembly includes a second motor, a second polished rod and a second screw. The second motor and the second polished rod are fixed on the frame, the second screw is rotatably connected to the frame, the axis of the second polished rod is parallel to the axis of the second screw, the second motor drives the second screw to rotate, and the second slide is slidably connected to the second polished rod and threadedly connected to the second screw.

[0019] To implement the above technical solution, when the second motor starts and drives the second screw to rotate, the second slide is connected to the rotating second screw by a thread, and is also slidably connected to the second polished rod serving as a guide. This allows the second slide to move accurately and smoothly in a straight line in a direction parallel to the axis of the second polished rod and the second screw, that is, in a vertical direction. This drive structure composed of the second motor, the second polished rod, and the second screw provides the second slide with stable and high-precision linear reciprocating motion. The second polished rod ensures the smoothness and guidance of the second slide's movement, while the cooperation of the second screw and the second motor enables precise control of the second slide's position, thereby ensuring that the die set it drives can be accurately raised, lowered, and positioned, thereby improving the accuracy and reliability of die transmission and positioning throughout the license plate production process.

[0020] As a preferred solution of the present invention, the limiting structure includes a connecting groove, a first limiting groove, a second limiting groove, a first limiting strip, a second limiting strip, and an outer protrusion. The connecting groove is opened on the second push plate and passes through the second push plate. The first limiting groove and the second limiting groove are opened on the second push plate and are connected to the connecting groove. The first limiting groove and the second limiting groove are arranged opposite to each other. The first limiting strip is slidably connected to the first limiting groove, and the second limiting strip is slidably connected to the second limiting groove. The two outer protrusions are respectively arranged at two ends of the concave module. The concave module is located in the connecting groove and supports one outer protrusion through the first limiting strip, and the other outer protrusion through the second limiting strip.

[0021] The second push plate moves from the second channel toward the pressure plate and supports the outer protrusion by bringing the first limit bar and the second limit bar closer to each other through the elastic structure. When the second push plate moves away from the pressure plate and corresponds to the second channel, the first limit bar and the second limit bar are separated from the outer protrusion through the elastic structure.

[0022] To implement the above technical solution, when the limiting structure is in operation, the two outer protrusions of the concave module are supported in the connecting groove by the first limiting bar and the second limiting bar, respectively, so that the concave module is firmly fixed and can move with the second push plate. After the blank is stamped, the second push plate moves and enters the second channel. At this time, the first limiting bar and the second limiting bar release their support for the concave module. This release mechanism ensures that when the concave module is selected next time, the die set can move freely in the connecting groove without being blocked by the first limiting bar and the second limiting bar, thereby smoothly carrying out the next round of mold selection and positioning. This limiting structure achieves stable and reliable clamping, limiting and free movement of the concave module through the precise support and release of the outer protrusions of the concave module by the first limiting bar and the second limiting bar. In particular, when the concave module is released, the timely separation of the limiting bars ensures unimpeded movement of the die set in the connecting groove, effectively avoiding jamming or interference during the mold selection and transmission process, and significantly improving the mold selection efficiency of the concave module and the smooth operation of the system. This not only ensures the precise positioning of the concave module before and after pressing, but also optimizes the smoothness and reliability of the mold replacement during the entire batch license plate production process.

[0023] As a preferred solution of the present invention, the elastic structure includes a stopper, an elastic member, a first rack, a second rack, a connecting block and a transmission gear, the transmission gear is rotatably connected to the second push plate, the first rack is fixedly connected to the first limit bar and meshes with the transmission gear, the second rack is fixedly connected to the second limit bar and meshes with the transmission gear, the first rack and the second rack are respectively located on both sides of the transmission gear, the connecting block is fixed on the outer wall of the first rack, the two ends of the elastic member are respectively connected to the connecting block and the second push plate, and the stopper is fixed on the frame and is used to interfere with the connecting block.

[0024] To implement this technical solution, when the second push plate moves from the second channel toward the pressure plate, the stop block and the connecting block separate. The elastic member, connected to the connecting block, exerts tension on the first rack. Because the first rack meshes with the transmission gear, which in turn meshes with the second rack, and the second rack is fixedly connected to the second stop bar, the tension of the elastic member, through this series of transmission mechanisms, drives the first and second stop bars toward each other in a synchronized movement, thereby clamping the outer protrusion of the female module. When the second push plate moves away from the pressure plate and toward the second channel, the stop block and the connecting block come into contact, simultaneously stretching the elastic member. Similarly, this action drives the first and second racks, respectively, away from the transmission gear, separating the first and second stop bars from the outer protrusion of the female module. This elastic structure, through the clever coordination of the elastic member, the connecting block, the first and second racks, and the transmission gear, achieves precise, automated clamping and reliable release of the female module. In particular, when the second push plate moves away from the pressure plate, the contact between the stopper and the connecting block cleverly triggers the stretching of the elastic member and the linkage of the rack, ensuring that the first and second limit bars can synchronously and quickly separate from the outer protrusion of the female module. This not only ensures the female module is firmly positioned during pressing, but more importantly, it optimizes the quick release process of the female module and avoids jamming, thereby significantly improving the efficiency of female module replacement and the automation, stability, and reliability of the entire license plate batch production process.

[0025] As a preferred solution of the present invention, the frame is connected to a transmission motor, a first connecting rod is fixedly connected to the power shaft of the transmission motor, a second connecting rod is hinged on the first connecting rod, the second connecting rod is fixedly connected to a height slide rail along its length direction, a horizontal slide rail is fixedly connected to the frame, a slider is slidably connected to the horizontal slide rail, the slider is slidably connected to the height slide rail on the side facing away from the horizontal slide rail, the second connecting rod is fixedly connected to a support frame, a feed suction cup and a discharging suction cup are connected to the support frame, the feed suction cup is used to place the blank on the lifting plate, and the discharging suction cup is used to remove the license plate from the lifting plate.

[0026] To implement the above technical solution, the transmission motor is activated, and its power shaft rotates the fixedly connected first connecting rod. The first connecting rod drives the second connecting rod in a coordinated motion. Because the second connecting rod is fixedly connected to a vertical slide along its length, and the slider slides on a horizontal slide on the frame, and the slider is also slidably connected to the vertical slide, the linkage between the first and second connecting rods enables the second connecting rod and the vertical slide to drive the slider along the horizontal slide, while simultaneously achieving a complex trajectory motion of the support frame in space, including combined horizontal and vertical displacement. Specifically, the feed suction cup reaches the blank along its motion trajectory, picks it up, and accurately places it on the lifting plate. Simultaneously, the discharge suction cup reaches the finished license plate along its motion trajectory, picks it up, and removes it from the lifting plate. This complex linkage mechanism, consisting of the transmission motor, multi-stage connecting rods, vertical slide, horizontal slide, and slider, provides a highly flexible, precise, and automated three-dimensional spatial motion trajectory for the feed and discharge suction cups. A set of mechanisms is used to realize automatic loading of blanks and automatic unloading of finished license plates, effectively replacing manual operations and greatly improving the automation level and production efficiency of license plate production.

[0027] As a preferred solution of the present invention, a plurality of limit rods arranged along the height direction of the frame are fixedly connected to the side walls of the frame, a support plate is slidably connected to the limit rod, and a accommodating area for placing the blank is formed between the support plate and the plurality of limit rods, a push rod arranged parallel to the limit rod is connected to the support plate, a feeding motor is connected to the frame, a worm is connected to the rotating shaft of the feeding motor, the worm is engaged with a worm wheel, the worm wheel is rotatably connected to the frame, and the push rod passes through the worm wheel and is threadedly connected to the worm wheel.

[0028] To implement the above technical solution, when the feeding motor starts and drives the worm to rotate, the worm drives the worm wheel to rotate. Since the worm wheel is threadedly connected to the push rod, the push rod can push the support plate to move. The support plate is also slidably connected to multiple limit rods arranged along the height direction of the frame side wall, so that the support plate can be raised and lowered in the vertical direction of the limit rods. The lifting and lowering of the support plate allows the height of the storage area enclosed by it to be precisely adjusted, thereby raising the blank placed therein to a position where the feeding suction cup can grasp it, or lowering it to replenish the blank after loading is completed. This mechanism consisting of the limit rods, support plate, push rod, and feeding motor realizes automatic, stable, and controllable vertical conveying and positioning of the blank, ensuring that the blank in the storage area can always be accurately delivered to the grasping height of the feeding suction cup, thereby simplifying the feeding process and improving the degree of automation and efficiency of the feeding. At the same time, the multiple limit rods provide stable guidance, preventing the support plate from shaking or getting stuck during the lifting process, ensuring the smooth and reliable conveying of the blank.

[0029] In summary, the present invention has the following beneficial effects:

[0030] 1. Improved die management and storage efficiency, optimizing equipment compactness: This batch license plate production machine effectively avoids the excessive space occupied by traditional die stacking by separating the male and female die groups and using independent lifting mechanisms to precisely control their transportation and positioning. This significantly improves the storage efficiency of the die library and makes the equipment more compact, facilitating equipment miniaturization and production line layout flexibility.

[0031] 2. Significantly improved batch production efficiency and automation: Through the parallel and coordinated operation of multiple first and second lifting mechanisms, the punch and die assemblies are independently and precisely transported and aligned, significantly reducing waiting time between processes. The automated coordination of the first and second push plates, the pressure plate, and their respective linkage mechanisms ensures efficient and continuous processing of blank loading, die alignment, stamping, and finished product discharge, significantly improving the overall efficiency and automation level of batch license plate production.

[0032] 3. Guaranteed precision and reliability in die transport and positioning: The first lifting mechanism, comprising the first support frame, second support frame, first slide, first motor, first polished rod, and first screw, provides stable and highly precise vertical lifting and horizontal displacement of the punch assembly, ensuring accurate placement and movement of the punch module, as well as coordinated positioning with the lifting plate, thereby ensuring precise placement of the blank on the punch module. The second lifting mechanism, comprising the third support frame, fourth support frame, second slide, second motor, second polished rod, and second screw, provides stable and highly precise vertical lifting and horizontal displacement of the die assembly, ensuring accurate placement and movement of the punch module, as well as precise alignment with the blank, thus guaranteeing stamping quality. The limiting structure includes a connecting groove, a first limiting groove, a second limiting groove, a first limiting strip, a second limiting strip, an outer protrusion, and an elastic structure, including a stopper, an elastic member, a first rack, a second rack, a connecting block and a transmission gear. Through exquisite coordination, the automatic precise clamping and reliable release of the concave module are achieved, effectively avoiding the jamming or falling off of the male module and the female module during the movement, and optimizing the smoothness and reliability of the replacement of the male module and the female module.

[0033] 4. Automated and stable conveying of blanks and finished license plates: A complex linkage mechanism consisting of a transmission motor, a first connecting rod, a second connecting rod, a height slide rail, a horizontal slide rail, and a slider provides a highly flexible, precise, and automated three-dimensional motion trajectory for the feed and discharge suction cups. This single mechanism simultaneously completes the automatic loading of blanks and the unloading of finished license plates, effectively replacing manual operations and significantly improving the automation level and production efficiency of license plate production. The blank containment and conveying mechanism, consisting of a limit rod, a support plate, a push rod, and a loading motor, achieves automatic, stable, and controllable vertical conveying and positioning of blanks, ensuring that blanks within the containment area are always accurately delivered to the gripping height of the feed suction cups, thereby simplifying the loading process and improving the degree of automation and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the external structure of the present invention;

[0035] Figure 2 To reflect the position diagram of the blank;

[0036] Figure 3 Schematic diagram of the internal structure of the present invention;

[0037] Figure 4 A schematic diagram showing the structure of the first lifting mechanism;

[0038] Figure 5 A schematic diagram showing the structure of the first push plate;

[0039] Figure 6 To reflect the structural diagram of the lifting plate;

[0040] Figure 7 for Figure 6 A magnified view of point A;

[0041] Figure 8 A schematic diagram showing the structure of the second lifting mechanism;

[0042] Figure 9 A schematic diagram showing the position of the second push plate;

[0043] Figure 10 for Figure 9 Enlarged view of point B;

[0044] Figure 11 A schematic diagram showing the limiting structure;

[0045] Figure 12 To show the location diagram of the convex module;

[0046] Figure 13 A schematic diagram showing the position of the pressure plate;

[0047] Figure 14 To show the position diagram of the license plate when it is formed;

[0048] Figure 15 To reflect the structural diagram of the support frame;

[0049] Figure 16 This is a schematic diagram showing the back structure of the support frame;

[0050] Figure 17 A schematic diagram showing the connection structure of the worm wheel and the worm.

[0051] Figure numerals: 1, frame; 2, first lifting mechanism; 3, convex module; 4, first driving motor; 5, first gear; 6, first toothed belt; 7, second gear; 8, first transmission block; 9, first push plate; 10, first slide rail; 11, lifting plate; 12, slot; 13, baffle; 14, displacement slot; 15, displacement wheel; 16, anti-slip plate; 17, first support frame; 18, second support frame; 19, first slide plate; 20, first power assembly; 21, First motor; 22, first polished rod; 23, first screw; 24, third gear; 25, second toothed belt; 26, fourth gear; 27, second push plate; 28, concave module; 29, second lifting mechanism; 30, third support frame; 31, fourth support frame; 32, second slide; 33, second power assembly; 34, second motor; 35, second polished rod; 36, second screw; 37, second drive motor; 38, fifth gear; 39, sixth gear; 4 0, third toothed belt; 41, second transmission block; 42, second screw rod; 43, second slide rail; 44, limiting structure; 45, connecting groove; 46, first limiting groove; 47, second limiting groove; 48, first limiting strip; 49, second limiting strip; 50, outer protrusion; 51, elastic structure; 52, stop block; 53, elastic member; 54, first rack; 55, second rack; 56, connecting block; 57, transmission gear; 58, power mechanism; 59, pressure plate; 6 0. Support block; 61. Transmission motor; 62. First connecting rod; 63. Second connecting rod; 64. Height slide rail; 65. Horizontal slide rail; 66. Support frame; 67. Feed suction cup; 68. Discharge suction cup; 69. Limit rod; 70. Support plate; 71. Push rod; 72. Feeding motor; 73. Blank; 74. First screw rod; 75. First channel; 76. Second channel; 77. Slider; 78. License plate; 79. Bearing; 80. Worm; 81. Worm gear. DETAILED DESCRIPTION

[0052] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0053] A batch license plate production machine includes a frame 1. The frame 1 is placed horizontally. A plurality of first lifting mechanisms 2 and a plurality of second lifting mechanisms 29 are connected to the frame 1. The first lifting mechanisms 2 are located to the left of the centerline of the frame 1, and the second lifting mechanisms 29 are located to the right of the centerline of the frame 1.

[0054] The seven first lifting mechanisms 2 are arranged side by side along the width direction of the frame 1 ; the seven second lifting mechanisms 29 are arranged side by side along the width direction of the frame 1 .

[0055] Each of the six adjacent first lifting mechanisms 2 is connected to a set of convex mold modules. Each convex mold module set includes 34 stacked convex modules 3, each of which contains 10 Arabic numeral convex modules 3 and 24 English letter convex modules 3. The convex mold module set in the seventh first lifting mechanism 2 located at the edge contains the province and city convex modules 3.

[0056] Correspondingly, among the six adjacent second lifting mechanisms 29, each second lifting mechanism 29 is connected to a set of concave die groups, and each set of concave die groups includes 34 stacked concave modules 28, and the 34 concave modules 28 are respectively 10 Arabic numeral concave modules 28 and 24 English letter concave modules 28.

[0057] A first drive motor 4, which is a servo motor, is fixedly connected to the upper surface of the frame 1. A first gear 5 is fixedly connected to the first drive shaft of the first drive motor 4, and the first gear 5 is connected to the second gear 7 via a first toothed belt 6. The two ends of the first screw rod 74 are rotatably connected to the frame 1 via bearings, and the second gear 7 is fixed to the end of the first screw rod 74 and arranged coaxially. A first transmission block 8 is threadedly connected to the first screw rod 74, and the first transmission block 8 is fixedly connected to the first push plate 9. A first slide rail 10 is fixedly connected to the upper surface of the frame 1, and the two sides of the first push plate 9 are slidably connected to the first slide rail 10. This realizes the sliding connection of the first push plate 9 to the frame 1.

[0058] The first screw rod 74 is arranged horizontally. The axial direction of the first screw rod 74, the length direction of the frame 1, and the length direction of the first slide rail 10 are parallel.

[0059] The end of the first push plate 9 is slidably connected to a lifting plate 11 along its height direction for supporting the male modules 3. The lifting plate 11 has a vertically connected slot 12 in the middle, which is used to accommodate a row of male modules 3. The inner wall of the slot 12 has a blocking piece 13, which is located between two adjacent male modules 3.

[0060] The lifting plate 11 has a displacement groove 14 extending along its height. A retaining plate 16 is fixedly attached to the sidewall of the first push plate 9. A displacement wheel 15, which functions as a bearing, is rotatably attached to the sidewall of the retaining plate 16. The displacement wheel 15 is located in the displacement groove 14. There are four displacement wheels 15, one at each corner of the lifting plate 11. When the displacement wheel 15 contacts the upper end of the displacement groove 14, the upper surface of the first push plate 9 is flush with the upper surface of the lifting plate 11.

[0061] Accordingly, the lifting plate 11 can move along the length direction of the displacement slot 14 .

[0062] The first lifting mechanism 2 comprises a first support frame 17, a second support frame 18, a first slide plate 19, and a first power assembly 20. Both the first support frame 17 and the second support frame 18 are fixed to the frame 1 and arranged along the height of the frame 1. The first support frame 17 and the second support frame 18 correspond to each other, and a first channel 75 for movement of the lifting plate 11 is defined between the first support frame 17 and the second support frame 18. The first support frame 17 is located below the first push plate 9, while the second support frame 18 is located above the first push plate 9.

[0063] The first slide plate 19 is driven by the first power assembly 20 and is slidably connected to the first support frame 17 . The first slide plate 19 pushes the punch assembly to move along the height direction of the first support frame 17 .

[0064] The male die sets are placed in the first support frame 17 via the upper end of the second support frame 18 and supported by the first slide 19. Therefore, one male die block 3 in each male die set must be located in the retaining groove 12 of the lifting plate 11. The width of the first channel 75 is greater than the thickness of one male die block 3 but less than the thickness of two male die blocks 3, ensuring that only one male die block 3 in a set of male die sets can be removed from the first channel 75.

[0065] The first power assembly 20 includes a first motor 21, a first polished rod 22, and a first screw 23. The first motor 21 and the first polished rod 22 are fixed to the lower surface of the frame 1. The first motor 21, the first polished rod 22, and the first screw 23 are all arranged vertically, that is, arranged along the height direction of the frame 1. The first screw 23 is rotatably connected to the frame 1. The axis of the first polished rod 22 is parallel to the axis of the first screw 23, and the first motor 21 drives the first screw 23 to rotate. The first slide 19 is slidably connected to the first polished rod 22 and is threadedly connected to the first screw 23. The first motor 21 is a servo motor.

[0066] When the first motor 21 drives the third gear 24 to rotate, the third gear 24 rotates the fourth gear 26 through the second toothed belt 25 . The fourth gear 26 is fixed to the end of the first screw 23 and is coaxially arranged with the first screw 23 .

[0067] Each first power assembly 20 corresponds to a set of male die sets. Therefore, when the first motor 21 is activated, the first slide 19 moves along the length of the first polished rod 22. Simultaneously, the first slide 19 pushes the 34 male die sets 3 above it to move up and down synchronously. Once the selected male die set 3 is located within the slot 12, the first slide 19 stops moving. Consequently, all male die sets can move simultaneously, greatly improving the efficiency of selecting male die sets 3.

[0068] After all the male modules 3 are located in the first channel 75, that is, in the card slot 12, the first drive motor 4 is turned on and the first push plate 9 moves toward the middle of the frame 1. At this time, the displacement plate moves away from the first channel 75. At the same time, the first push plate 9 is located in the first channel 75 to prevent the position of the male module 3 in the male module group from changing.

[0069] A limiting structure 44 for limiting the concave module 28 is connected to the second push plate 27 .

[0070] The second lifting mechanism 29 includes a third support frame 30, a fourth support frame 31, a second slide 32, and a second power assembly 33. Both the third support frame 30 and the fourth support frame 31 are fixed to the frame 1 and arranged along the height of the frame 1, that is, the third support frame 30 and the fourth support frame 31 are arranged vertically. The third support frame 30 is located below the second push plate 27, and the fourth support frame 31 is located above the second push plate 27. The third support frame 30 and the fourth support frame 31 are arranged in a corresponding manner, forming a second passage 76 between the third support frame 30 and the fourth support frame 31 for the retaining structure 44 to pass through.

[0071] The first slide plate 19 and the second slide plate 32 are both L-shaped.

[0072] The die sets are placed in the third support frame 30 via the upper end of the fourth support frame 31 and supported by the second slide 32. Therefore, one die block 28 in each die set must be located in the retaining structure 44. The width of the second channel 76 is greater than the thickness of one die block 28 but less than the thickness of two die blocks 28, ensuring that only one die block 28 in a die set can be removed from the second channel 76.

[0073] The second slide plate 32 is driven by the second power assembly 33 and is slidably connected to the third support frame 30. The second slide plate 32 pushes the die assembly to move along the height direction of the third support frame 30.

[0074] The second power assembly 33 includes a second motor 34, a second polished rod 35, and a second screw rod 36. The second motor 34 and the second polished rod 35 are both fixed to the frame 1 and arranged vertically. The second screw rod 36 is rotatably connected to the frame 1, and the axis of the second polished rod 35 is parallel to the axis of the second screw rod 36. The second motor 34 drives the second screw rod 36 to rotate. The second slide 32 is slidably connected to the second polished rod 35 and is threadedly connected to the second screw rod 36. The second motor 34 is a servo motor. The second motor 34 drives the second screw rod 36 to rotate via gears and a toothed belt.

[0075] Each second power assembly 33 corresponds to a set of concave die sets. Therefore, when the second motor 34 is activated, the second slide 32 moves along the length of the second polished rod 35. Simultaneously, the second slide 32 pushes the 34 concave modules 28 above it to move up and down synchronously. Once the selected concave module 28 is within the retaining structure 44, the second slide 32 stops moving. Consequently, all concave die sets can move simultaneously, greatly improving the efficiency of selecting concave modules 28.

[0076] After all the concave modules 28 are located in the limiting structure 44, the second drive motor 37 is turned on and the second push plate 27 moves toward the middle of the frame 1. At this time, the limiting structure 44 moves away from the second channel 76. At the same time, the second push plate 27 is located in the second channel 76 to prevent the position of the concave modules 28 in the concave die set from changing.

[0077] The second drive motor 37 is fixed to the upper surface of the frame 1. The fifth gear 38 is fixedly connected to the second drive shaft of the second drive motor 37, and the fifth gear 38 drives the sixth gear 39 to rotate through the third toothed belt 40. The sixth gear 39 is fixed to the second screw rod 42 and is coaxially arranged with the second screw rod 42. The second screw rod 42 is arranged horizontally and the axis of the second screw rod 42 is parallel to the axis of the first screw rod 74. The second transmission block 41 is threadedly connected to the second screw rod 42, and the second transmission block 41 is fixedly connected to the second push plate 27. A second slide rail 43 is fixedly connected to the upper surface of the frame 1, and the second push plate 27 is slidably connected to the second slide rail 43. The length direction of the second slide rail 43 is parallel to the axial direction of the second screw rod 42.

[0078] The limiting structure 44 includes a connecting groove 45, a first limiting groove 46, a second limiting groove 47, a first limiting strip 48, a second limiting strip 49, and an outer protrusion 50. Each of the two ends of each concave module 28 has an outer protrusion 50.

[0079] The connecting groove 45 is formed on the second push plate 27 and penetrates the second push plate 27 . A blocking piece 13 is fixedly connected to the inner wall of the connecting groove 45 . The blocking piece 13 is located between two adjacent concave modules 28 .

[0080] A first limiting groove 46 and a second limiting groove 47 are formed on the second push plate 27 and communicate with the connecting groove 45. The first limiting groove 46 and the second limiting groove 47 are arranged opposite to each other, and the first limiting bar 48 is slidably connected to the first limiting groove 46, and the second limiting bar 49 is slidably connected to the second limiting groove 47.

[0081] Each female module 28 is located in the connecting groove 45 and has one outer protrusion 50 supported by the first limiting strip 48 and the other outer protrusion 50 supported by the second limiting strip 49 .

[0082] The second push plate 27 moves from the second channel 76 toward the pressing plate 59 , and the elastic structure 51 causes the first limiting strip 48 and the second limiting strip 49 to move toward the rear supporting outer protrusion 50 .

[0083] When the second push plate 27 moves away from the pressing plate 59 and corresponds to the second channel 76 , the elastic structure 51 separates the first and second limiting strips 48 , 49 from the outer protrusion 50 , so that the female module 28 can be selected again.

[0084] The elastic structure 51 includes a stopper 52, an elastic member 53, a first rack 54, a second rack 55, a connecting block 56, and a transmission gear 57. The transmission gear 57 is rotatably connected to the second push plate 27, with the axis of the transmission gear 57 arranged vertically. The end of the first rack 54 is fixedly connected to the first limit bar 48, and the other end of the first rack 54 meshes with the transmission gear 57.

[0085] The end of the second rack 55 is fixedly connected to the second limiting bar 49, and the other end of the second rack 55 is meshed with the transmission gear 57. The first rack 54 and the second rack 55 are located on both sides of the transmission gear 57 respectively.

[0086] The connecting block 56 is fixed vertically to the outer wall of the first rack 54. The two ends of the elastic member 53 are fixedly connected to the connecting block 56 and the second push plate 27 respectively. The stopper 52 is fixed to the frame 1 and is used to contact the connecting block 56. The elastic member 53 is a tension spring.

[0087] Two elastic structures 51 are provided and are respectively located on both sides of the second push plate 27 .

[0088] Therefore, when the second motor 34 is started, the second slide 32 moves along the length of the second polished rod 35. At the same time, the second slide 32 can push the 34 concave modules 28 located above it to move up and down synchronously. Because the connecting block 56 and the stop block 52 remain in contact, the first limiting bar 48 and the second limiting bar 49 do not come into contact with the outer protrusion 50. Therefore, the concave module assembly can move along the height direction of the third support frame 30, and the concave modules 28 in the concave module assembly can pass through the connecting slot 45. After all selected concave modules 28 are located in the connecting slot 45, the second slide 32 stops moving.

[0089] Then the second drive motor 37 is turned on, and the second push plate 27 moves toward the middle of the frame 1. At this time, the second push plate 27 is placed in the second channel 76. At the same time, the stop block 52 and the connecting block 56 are separated. Through the elastic force of the elastic member 53, the first limit bar 48 and the second limit bar 49 can be moved toward each other to clamp the two ends of the concave module 28, and the outer protrusion 50 on the concave module 28 is located above the first limit bar 48 and the second limit bar 49. At this time, the first limit bar 48 and the second limit bar 49 provide stable support for the concave module 28.

[0090] The middle part of the frame 1 is connected to a pressing plate 59 via a power mechanism 58, which is a hydraulic cylinder or a pneumatic cylinder. The pressing plate 59 is arranged horizontally.

[0091] When the lifting plate 11 moves from the first passage 75 to between the pressing plate 59 and the first passage 75, the blank 73 is placed on the male module 3. To prevent the blank 73 from moving, a plurality of positioning posts are fixedly connected to the upper surface of the lifting plate 11. The positioning posts correspond to the positioning grooves on the blank 73, so that the blank 73 covers the male module 3 while preventing the blank 73 from moving on the lifting plate 11.

[0092] A positioning recess corresponding to the positioning post is formed on the second push plate 27 .

[0093] Then the lifting plate 11 moves to above the pressing plate 59. Then the limiting structure 44 moves to above the lifting plate 11.

[0094] A support block 60 is fixedly connected to the middle of the frame 1 . The support block 60 is located above the limiting structure 44 and is arranged opposite to the pressing plate 59 .

[0095] The male modules 3 on the lifting plate 11 correspond one-to-one with the female modules 28 on the retaining structure 44. The male modules 3 and female modules 28 are vertically aligned. The power mechanism 58 is then activated, causing the pressure plate 59 to move upward. This pushes the lifting plate 11 toward the retaining structure 44, causing the displacement wheel 15 to move along the length of the displacement slot 14. With the cooperation of the support block 60, the male modules 3, and the female modules 28, the blank 73 is stamped and formed, resulting in the license plate 78.

[0096] Then the pressing plate 59 moves down and resets, and the limiting structure 44 moves into the second channel 76. The lifting plate 11 moves between the first channel 75 and the support block 60. After the license plate 78 is removed from the lifting plate 11, the lifting plate 11 moves into the first channel 75.

[0097] A transmission motor 61 is fixedly connected to the upper surface of the support block 60 of the frame 1. The transmission motor 61 is horizontally arranged. The power shaft of the transmission motor 61 is fixedly connected to the lower end of the first connecting rod 62, and the upper end of the first connecting rod 62 is hinged to the upper end of the second connecting rod 63.

[0098] The second connecting rod 63 is fixedly connected to the height slide rail 64 along its length direction, and the second connecting rod 63 is vertically arranged.

[0099] A horizontal slide rail 65 is fixedly connected to the rack 1 , and a slider 77 is slidably connected to the horizontal slide rail 65 . The side of the slider 77 facing away from the horizontal slide rail 65 is slidably connected to the height slide rail 64 .

[0100] A support frame 66 is fixedly connected to the second connecting rod 63. Four feed suction cups 67 and four discharge suction cups 68 are fixedly connected to the support frame 66. The four feed suction cups 67 are located to the left of the four discharge suction cups 68. The feed suction cups 67 are used to place the blank 73 on the lifting plate 11, and the discharge suction cups 68 are used to remove the license plate 78 from the lifting plate 11. Both the feed suction cups 67 and the discharge suction cups 68 are connected to an air pump.

[0101] When the transmission motor 61 is started, the first connecting rod 62 rotates, and the second connecting rod 63 moves up and down while translating along the horizontal slide rail 65, so that the second connecting rod 63 and the support frame 66 are in an arc-shaped moving state.

[0102] A plurality of limit rods 69 arranged along the height direction of the frame 1 are fixedly connected to the side wall of the frame 1. A support plate 70 is slidably connected to the limit rod 69, and a receiving area for placing the blank 73 is formed between the support plate 70 and the plurality of limit rods 69. A push rod 71 is fixedly connected to the lower surface of the support plate 70, and the axis of the push rod 71 is parallel to the axis of the limit rod 69. The feeding motor 72 is fixedly connected to the frame 1. A worm 80 is fixedly connected to the rotating shaft of the feeding motor 72, and the worm 80 and the rotating shaft are arranged coaxially. The worm 80 is engaged with a worm gear 81, and the worm gear 81 is rotatably connected to the frame 1 through a bearing 79. The push rod 71 passes through the worm gear 81 and is threadedly connected to the worm gear 81.

[0103] The feeding motor 72 is a servo motor.

[0104] I. Preparing and Loading Blank 73: When loading is required, the loading motor 72 rotates the worm 80, which in turn rotates the worm gear 81. Because the worm gear 81 is threadedly connected to the push rod 71, the push rod 71 drives the support plate 70 up and down along the vertical axis of the limit rod 69, thereby precisely adjusting the height of the receiving area and lifting the blank 73 therein to a position where it can be grasped by the feed suction cup 67. Subsequently, the transmission motor 61 located above the support block 60 is activated, and its power shaft rotates the fixedly connected first connecting rod 62. The first connecting rod 62, through its hinged connection, drives the second connecting rod 63 for coordinated movement. Because the second connecting rod 63 is fixedly connected to the height rail 64 along its length and is slidably connected to the horizontal rail 65 on the frame 1, the slider 77 slides on the horizontal rail 65 and is slidably connected to the height rail 64. Therefore, the second connecting rod 63 and the height rail 64 on it drive the slider 77 to move along the horizontal rail 65, and simultaneously realize the complex trajectory movement of the support frame 66 in space, including compound displacement in the horizontal and vertical directions. At this time, the feeding suction cup 67 connected to the support frame 66 reaches the blank 73 along its motion trajectory, sucks a piece of blank 73 through the air pump, and accurately places it on the positioning column on the lifting plate 11. The positioning column corresponds to the positioning groove on the blank 73, ensuring that the blank 73 is firmly fixed on the lifting plate 11 and prevents movement.

[0105] II. Punch Selection and Positioning: Before the blank 73 is loaded, the first lifting mechanism 2 begins operation. The first motor 21 drives the first screw 23 to rotate. Because the first slide 19 is threadedly connected to the first screw 23 and slidably connected to the first polished rod 22, the first slide 19 moves precisely and smoothly in a vertical linear direction. The first slide 19 propels the punch assembly (consisting of 34 stacked punch modules 3) located within the first support frame 17 and the second support frame 18 up and down synchronously. When the selected punch module 3 is located in the slot 12 of the lifting plate 11, the first slide 19 stops moving. The entire punch assembly can move simultaneously, greatly improving the efficiency of selecting punch modules 3. When all selected punch modules 3 are located in the first channel 75, that is, in the slot 12 of the lifting plate 11, the first drive motor 4 is activated, driving the first screw 74 to rotate, thereby driving the first transmission block 8 and the first push plate 9 fixed to it toward the center of the frame 1. During this process, the lifting plate 11 and the selected male module 3 thereon are moved away from the first channel 75 until the lifting plate 11 stops between the pressing plate 59 and the second support frame 18. The blank 73 is then placed on the male module 3. The lifting plate 11 is then moved between the pressing plate 59 and the support block 60.

[0106] III. Concave Die Selection and Positioning: Simultaneously with the selection of the male die, the second lifting mechanism 29 begins operating. The second motor 34 drives the second screw 36 to rotate. The second slide 32 is threadedly connected to the second screw 36 and slidably connected to the second polished rod 35, enabling precise and smooth vertical linear movement of the second slide 32. The second slide 32 propels the concave die assembly (consisting of 34 stacked concave modules 28) located in the third support frame 30 and the fourth support frame 31 up and down synchronously. When the selected concave module 28 is located within the connecting groove 45 of the retaining structure 44, the second slide 32 stops moving. During this process, because the stopper 52 and the connecting block 56 remain in contact, the elastic member 53 is not stretched, and neither the first limit bar 48 nor the second limit bar 49 contacts the outer protrusion 50 of the concave module 28. This ensures that the concave die assembly can move freely along the height direction of the third support frame 30 and that the concave module 28 can smoothly pass through the connecting groove 45. When all selected concave modules 28 are located in the connecting grooves 45 in the limiting structure 44 , the second slide 32 stops moving. Since all the concave module groups can move simultaneously, the efficiency of selecting the concave modules 28 is greatly improved.

[0107] Subsequently, the second drive motor 37 is activated, rotating the second screw rod 42, thereby driving the second push plate 27 toward the center of the frame 1 through the second transmission block 41. At this point, the second push plate 27 is placed in the second channel 76. Simultaneously, the stop block 52 and the connecting block 56 separate, compressing the elastic member 53 in the elastic structure 51. This tension, through the coordinated action of the connecting block 56, the first rack 54, the transmission gear 57, and the second rack 55, drives the first and second limiting bars 48 and 49 to move synchronously toward each other, clamping the ends of the concave module 28 and positioning the outer protrusion 50 above the first and second limiting bars 48 and 49, thereby providing stable support and limiting for the concave module 28. The limiting structure 44 (including the clamped concave module 28) moves above the level of the lifting plate 11 and is positioned between the pressure plate 59 and the support block 60.

[0108] Fourth, Blank 73 is Stamped: After the male module 3 on the lifting plate 11 is aligned with the female module 28 on the retaining structure 44, and the blank 73 is precisely placed on the male module 3, the power mechanism 58 begins to operate, driving the pressure plate 59 upward. The pressure plate 59 pushes the lifting plate 11 toward the retaining structure 44. During this process, the displacement slot 14 moves upward along its length. With the close cooperation of the support block 60, the male module 3, and the female module 28, the blank 73 is precisely stamped and formed, and the license plate 78 is finally obtained.

[0109] 5. Removal and Repositioning of the Finished License Plate 78: After stamping is complete, the power mechanism 58 drives the pressure plate 59 downward and resets. The displacement wheel 15 moves along the displacement slot 14, thereby driving the lifting plate 11 to move smoothly downward to prevent it from getting stuck. The limiting structure 44 moves into the second channel 76 along with the second push plate 27. The first limiting bar 48 and the second limiting bar 49 separate from the outer protrusion 50 of the concave module 28, releasing the concave module 28 so that it can be reselected next time. At the same time, the lifting plate 11 moves between the first channel 75 and the support block 60. The discharge suction cup 68 connected to the support frame 66 reaches the formed license plate 78 along its motion trajectory, sucks the license plate 78 up using an air pump, and removes it from the lifting plate 11. After removing the license plate 78, the lifting plate 11 finally moves into the first channel 75 to await the next round of blank 73 loading and mold selection.

[0110] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A batch license plate production machine, including a frame, characterized by: The frame is connected to a plurality of first lifting mechanisms and a plurality of second lifting mechanisms, each of the first lifting mechanisms is connected to a group of male die groups, each group of male die groups includes a plurality of male modules, each of the second lifting mechanisms is connected to a group of female die groups, each group of female die groups includes a plurality of female modules, a first push plate and a second push plate are slidably connected to the frame, the first push plate is slidably connected to the lifting plate, a slot for driving the male module to move is provided on the lifting plate, a limiting structure for limiting the female module is connected to the second push plate, the lifting plate is located below the limiting structure, and the frame is connected to a pressing plate through a power mechanism; After the lifting plate and the limiting structure move toward the pressing plate and the male module corresponds to the female module, the pressing plate pushes the lifting plate toward the limiting structure and the blank between the male module and the female module is formed into a license plate; The first lifting mechanism includes a first support frame, a second support frame, a first slide and a first power assembly. The first support frame and the second support frame are both fixed on the frame and arranged along the height direction of the frame. The first support frame and the second support frame correspond to each other and there is a first channel for the movement of the lifting plate between the first support frame and the second support frame. The first slide is driven by the first power assembly and slidably connected to the first support frame. The punch group is slidably connected to the first support frame and the second support frame. The first slide pushes the punch group to move along the height direction of the first support frame.

2. The batch license plate production machine according to claim 1, characterized in that: The first power assembly includes a first motor, a first polished rod and a first screw. The first motor and the first polished rod are fixed on a frame. The first screw is rotatably connected to the frame. The axis of the first polished rod is parallel to the axis of the first screw. The first motor drives the first screw to rotate. The first slide is slidably connected to the first polished rod and is threadedly connected to the first screw.

3. The batch license plate production machine according to claim 1, characterized in that: An anti-slip plate is fixedly connected to the first push plate, a displacement groove arranged along the height direction of the lifting plate is opened on the side wall of the lifting plate, and a displacement wheel is connected to the anti-slip plate, and the displacement wheel is located in the displacement groove.

4. The batch license plate production machine according to claim 1, characterized in that: The second lifting mechanism includes a third support frame, a fourth support frame, a second slide and a second power assembly. The third support frame and the fourth support frame are both fixed to the frame and arranged along the height direction of the frame. The third support frame and the fourth support frame are arranged correspondingly. A second channel for a limiting structure to pass through is formed between the third support frame and the fourth support frame. The die group is slidably connected to the third support frame and the fourth support frame. The second slide is driven by the second power assembly and slidably connected to the third support frame. The second slide pushes the die group to move along the height direction of the third support frame.

5. The batch license plate production machine according to claim 4, characterized in that: The second power assembly includes a second motor, a second polished rod and a second screw. The second motor and the second polished rod are fixed on the frame. The second screw is rotatably connected to the frame. The axis of the second polished rod is parallel to the axis of the second screw. The second motor drives the second screw to rotate. The second slide is slidably connected to the second polished rod and is threadedly connected to the second screw.

6. The batch license plate production machine according to claim 4, characterized in that: The limiting structure includes a connecting groove, a first limiting groove, a second limiting groove, a first limiting strip, a second limiting strip, and an outer protrusion. The connecting groove is opened on the second push plate and passes through the second push plate. The first limiting groove and the second limiting groove are opened on the second push plate and are connected with the connecting groove. The first limiting groove and the second limiting groove are arranged opposite to each other. The first limiting strip is slidably connected to the first limiting groove, and the second limiting strip is slidably connected to the second limiting groove. The two outer protrusions are respectively arranged at two ends of the concave module. The concave module is located in the connecting groove and one outer protrusion is supported by the first limiting strip, and the other outer protrusion is supported by the second limiting strip. The second push plate moves from the second channel toward the pressure plate and supports the outer protrusion by bringing the first limit bar and the second limit bar closer to each other through the elastic structure. When the second push plate moves away from the pressure plate and corresponds to the second channel, the first limit bar and the second limit bar are separated from the outer protrusion through the elastic structure.

7. The batch license plate production machine according to claim 6, characterized in that: The elastic structure includes a stopper, an elastic member, a first rack, a second rack, a connecting block and a transmission gear, the transmission gear is rotatably connected to the second push plate, the first rack is fixedly connected to the first limit bar and meshes with the transmission gear, the second rack is fixedly connected to the second limit bar and meshes with the transmission gear, the first rack and the second rack are respectively located on both sides of the transmission gear, the connecting block is fixed on the outer wall of the first rack, the two ends of the elastic member are respectively connected to the connecting block and the second push plate, and the stopper is fixed to the frame and is used to interfere with the connecting block.

8. A batch license plate production machine according to any one of claims 1 to 7, characterized in that: The frame is connected to a transmission motor, a first connecting rod is fixedly connected to a power shaft of the transmission motor, a second connecting rod is hinged on the first connecting rod, the second connecting rod is fixedly connected to a height slide rail along its length direction, the frame is fixedly connected to a horizontal slide rail, a slider is slidably connected to the horizontal slide rail, the slider is slidably connected to the height slide rail on the side facing away from the horizontal slide rail, the second connecting rod is fixedly connected to a support frame, a feed suction cup and a discharging suction cup are connected to the support frame, the feed suction cup is used to place the blank on the lifting plate, and the discharging suction cup is used to remove the license plate from the lifting plate.

9. The batch license plate production machine according to claim 8, characterized in that: A plurality of limit rods arranged along the height direction of the frame are fixedly connected to the side walls of the frame, and a support plate is slidably connected to the limit rods. A accommodating area for placing the blanks is formed between the support plate and the plurality of limit rods. A push rod arranged parallel to the limit rods is connected to the support plate. The feeding motor is connected to the frame, and the rotating shaft of the feeding motor is connected to a worm, the worm is engaged with a worm gear, and the worm gear is rotatably connected to the frame, and the push rod passes through the worm gear and is threadedly connected to the worm gear.

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