A laminated structure signboard pressing device

Abstract

The utility model discloses a kind of compression devices of multilayer structure vertical board, including rack, vertical feeding assembly, material guiding assembly, roller pressing assembly and compression assembly are sequentially equipped on the rack, the feeding assembly includes feeding roller rotationally arranged on rack, the material guiding assembly includes material guiding plate fixedly arranged on rack, material guiding adjusting groove is horizontally provided on the material guiding plate, material guiding adjusting assembly is installed in the material guiding adjusting groove, the utility model compression device realizes the continuous conveying of plate by automatic feeding assembly, the accurate positioning of different size plate is ensured by material guiding adjusting groove and adjusting assembly in material guiding assembly, the lifting adjustment of roller pressing assembly and the double roller cylinder pressure provide preliminary uniform pressure, the final pressure of accurate controllable is realized by the lifting guide rail and lower pressing die head of compression assembly, so as to significantly improve the compression efficiency and strength of multilayer plate, ensure that bonding is firm and meet the sealing requirement of quicksand vertical board, effectively solve the problem of insufficient artificial compression strength and low efficiency.

Description

Technical Field

[0001] This utility model relates to the field of signboard production technology, specifically a pressing device for multi-layer structure signboards. Background Technology

[0002] As shown in the published patent CN219096387U, "A Floating Standee Ornament", the quicksand standee generally includes a sealed chamber composed of multiple layers of boards, and the sealed chamber is filled with quicksand oil.

[0003] In the existing stand-up stand production process, in some usage scenarios, in order to make the stand-up stand have a three-dimensional effect, multiple layers of transparent or hollowed-out sheet material structures are superimposed on the stand-up stand. Similarly, in some usage scenarios, in order to protect the printed pattern on the stand-up stand, multiple layers of transparent protective sheet material are superimposed on the stand-up stand. Also, in some usage scenarios, in order to create a quicksand effect, multiple layers of sheet material are required to be enclosed and superimposed.

[0004] In existing technologies, one method for connecting the multi-layer boards of a standee is by applying adhesive. To ensure a strong bond between the multi-layer boards, especially for quicksand standees where a sealed connection between the boards is also required, the multi-layer boards need to be pressed together after applying the adhesive. In the current production process, the pressing of some standees is done manually, which results in insufficient pressing force and low efficiency. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pressing device for a multi-layered stand sign includes a frame, on which a feeding assembly, a guiding assembly, a roller pressing assembly and a pressing assembly are arranged longitudinally in sequence.

[0008] The feeding assembly includes a feeding roller that is rotatably mounted on the frame;

[0009] The material guiding assembly includes a material guiding plate fixed on the frame, a material guiding adjustment groove is laterally opened on the material guiding plate, and a material guiding adjustment assembly is installed in the material guiding adjustment groove;

[0010] The roller pressing assembly includes a first roller rotatably mounted on a frame, a lifting adjustment assembly fixedly mounted on the frame, and a second roller rotatably mounted on the lifting adjustment assembly to press against the first roller.

[0011] The pressing assembly includes a lifting guide rail fixedly mounted on a frame, a lifting adjustment block slidably mounted on the lifting guide rail, a crossbeam fixedly mounted on the lifting adjustment block, and a lower pressing die head for performing the pressing operation mounted on the lower end of the crossbeam.

[0012] As a further embodiment of this utility model: the lifting and adjusting assembly includes an adjusting mounting plate fixed on the frame, an adjusting mounting groove is provided on the adjusting mounting plate, an adjusting slider is slidably installed in the adjusting mounting groove, a first threaded connector is installed on the adjusting mounting plate, a first threaded adjusting rod is screwed into the first threaded connector, and the lower end of the first threaded adjusting rod is rotatably connected to the adjusting slider.

[0013] As a further embodiment of this utility model: the frame is provided with a transmission assembly that drives the first roller and the second roller to rotate synchronously. The transmission assembly includes a first gear and a second gear respectively fixedly connected to the ends of the first roller and the second roller. The first gear and the second gear are sequentially meshed and connected to a first transmission gear and a second transmission gear. A first mounting shaft is rotatably mounted on the first transmission gear, and a second mounting shaft is rotatably mounted on the second rotating gear. A first connecting plate is installed between the first mounting shaft and the first roller, and both ends of the first connecting plate are rotatably connected to the first mounting shaft and the first roller respectively. A second connecting plate is installed between the second mounting shaft and the second roller, and both ends of the second connecting plate are rotatably connected to the second mounting shaft and the second roller respectively. A third connecting plate is installed between the first mounting shaft and the second mounting shaft, and both ends of the third connecting plate are rotatably connected to the first mounting shaft and the second mounting shaft respectively. The frame is provided with a servo motor that drives the first roller to rotate.

[0014] As a further embodiment of this utility model: at least two of the first, second and third connecting plates are symmetrically installed on both sides of the first transmission gear and the second transmission gear.

[0015] As a further embodiment of this utility model: a second threaded connector is fixedly installed on the crossbeam, and a second threaded adjusting rod is screwed into the second threaded connector. The lower end of the threaded adjusting rod is rotatably connected to the lower pressure die head.

[0016] As a further embodiment of this utility model: the material guiding adjustment assembly includes a T-shaped mounting block that slides within the material guiding adjustment groove and a material guiding rod mounted on the T-shaped mounting block, wherein a screw adjusting component is screwed between the T-shaped mounting block and the material guiding rod.

[0017] As a further embodiment of this utility model: the feeding assembly includes a feeding mounting rod that extends from the front end of the frame and is fixedly attached, and the feeding roller is mounted on the feeding mounting rod.

[0018] As a further embodiment of this utility model: a lifting cylinder is fixed on the frame for driving the lifting adjustment block to adjust up and down.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model's pressing device achieves continuous conveying of sheet metal through an automated feeding assembly. The guiding adjustment groove and adjustment component in the guiding assembly ensure precise positioning of sheet metal of different sizes. The lifting adjustment and double roller pressing of the roller pressing assembly provide initial uniform pressure. The lifting guide rail and lower pressing die of the pressing assembly achieve precise and controllable final pressure, thereby significantly improving the pressing efficiency and force of multi-layer sheet metal, ensuring strong adhesion and meeting the sealing requirements of quicksand standees, and effectively solving the problems of insufficient pressing force and low efficiency of manual pressing. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural view of the present invention;

[0022] Figure 2 This is another three-dimensional view of the structure of this utility model;

[0023] Figure 3 This is a top view of the present invention;

[0024] Figure 4 yes Figure 3 A cross-sectional perspective view along the AA direction;

[0025] Figure 5 This is a three-dimensional structural view of the transmission component 122 in this utility model;

[0026] Figure 6 This is another three-dimensional view of the transmission component 122 in this utility model;

[0027] The reference numerals and names in the figure are as follows:

[0028] Frame-101, Feeding assembly-102, Guiding assembly-103, Roller pressing assembly-104, Pressing assembly-105, Feeding roller-106, Guide plate-107, Guide adjusting groove-108, Guide adjusting assembly-109, First roller-110, Lifting adjusting assembly-111, Second roller-112, Lifting guide rail-113, Lifting adjusting block-114, Crossbeam-115, Lower pressing die-head-116, Adjusting mounting plate-117, Adjusting mounting groove-118, Adjusting slider-119, First threaded connector-120 First threaded adjusting rod - 121, transmission assembly - 122, first gear component - 123, second gear component - 124, first transmission gear - 125, second transmission gear - 126, first mounting shaft - 127, second mounting shaft - 128, first connecting plate - 129, second connecting plate - 130, third connecting plate - 131, servo motor component - 132, second threaded connector component - 133, second threaded adjusting rod - 134, guide rod - 136, screw adjusting component - 137, feeding mounting rod - 138, lifting cylinder component - 139. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-6 A pressing device for a multi-layered stand sign includes a frame 101, on which a feeding assembly 102, a guiding assembly 103, a roller pressing assembly 104 and a pressing assembly 105 are arranged longitudinally.

[0031] The feeding assembly 102 includes a feeding roller 106 that is rotatably mounted on the frame 101;

[0032] The material guiding assembly 103 includes a material guiding plate 107 fixed on the frame 101, a material guiding adjustment groove 108 is laterally opened on the material guiding plate 107, and a material guiding adjustment assembly 109 is installed in the material guiding adjustment groove 108.

[0033] The roller pressing assembly 104 includes a first roller 110 rotatably mounted on a frame 101, a lifting adjustment assembly 111 fixedly mounted on the frame 101, and a second roller 112 rotatably mounted on the lifting adjustment assembly 111 to press against the first roller 110.

[0034] The pressing assembly 105 includes a lifting guide rail 113 fixedly mounted on the frame 101, a lifting adjustment block 114 slidably mounted on the lifting guide rail 113, a crossbeam 115 fixedly mounted on the lifting adjustment block 114, and a lower pressing die head 116 for performing pressing operations mounted at the lower end of the crossbeam 115.

[0035] This utility model's multi-layer stand-up sign pressing device significantly improves production efficiency and product quality through a highly automated and precisely controllable pressing process. Its feeding component 102 (feeding roller 106) achieves automatic and continuous feeding, fundamentally replacing manual handling and initial positioning, and greatly increasing production cycle time. The guiding component 103 (guide plate 107, guiding adjustment groove 108, guiding adjustment component 109) provides crucial lateral positioning and guiding functions. The guiding adjustment groove 108, in conjunction with the adjustment component, allows for flexible and precise positioning adjustment for boards of different widths and shapes, ensuring that the multi-layer boards remain precisely aligned before entering the pressing area, effectively preventing poor pressing or defective products due to misalignment. The roller pressing component 104 (first roller 110, second roller 112, lifting adjustment component 111) constitutes the crucial first-stage pressing. The lifting adjustment component 111 can precisely set the gap pressure between the two rollers, ensuring that the multi-layer boards receive uniform and controllable initial roller pressing as they pass through. This process not only effectively removes interlayer air but also promotes adhesive bonding. The initial spreading and contact lays a good foundation for the subsequent final pressing, while its continuous rolling characteristic further improves efficiency; the core pressing component 105 (lifting guide rail 113, lifting adjustment block 114, crossbeam 115, and lower pressing die 116) undertakes the final precision pressing task. The lifting guide rail 113 ensures the vertical accuracy and stability of the pressing movement, the lifting adjustment block 114 allows for precise setting of the final pressing height and stroke according to the total thickness of the sheet metal, and the lower pressing die 116, through the crossbeam 115, lifts the huge, uniform... The uniform pressure is applied vertically to the entire surface of the stacked boards. This high-precision and high-strength final pressure ensures that the adhesive (especially the adhesive for quicksand standees with extremely high sealing requirements) can fully fill the gaps and form a strong and sealed bonding interface. This completely overcomes the core defects of manual pressing, such as insufficient pressure, uneven pressure application, low efficiency, and difficulty in ensuring sealing. Ultimately, it achieves efficient, high-quality, and highly consistent production of multi-layer structure standees (including complex multi-layer transparent boards, hollow boards, protective boards, and sealed quicksand cavities).

[0036] Automated continuous feeding eliminates the time spent on manual handling and initial placement, directly increasing overall production speed; the continuous rolling process itself is a highly efficient initial pressing method, much faster than manual single-piece operation.

[0037] From feeding, guiding and positioning, preliminary rolling to final pressing, a continuous or semi-continuous production line is formed, which is significantly better than manual discrete operation. The guide adjustment groove 108 and components can quickly adapt to the needs of different products (boards of different widths and shapes), ensuring that each layer is accurately positioned before pressing. This is the basis for ensuring the alignment, aesthetics and functionality (such as sealing of the quicksand cavity) of the final product, avoiding frequent changes of fixtures or adjustments to the entire machine structure for different specifications of products. The uniform rolling of the double rollers can effectively expel the air trapped between layers, prevent the formation of air bubbles, and promote the initial uniform spread of the adhesive, increasing the effective contact area. The lifting adjustment component 111 ensures that the roller pressure can be precisely set according to the characteristics of the board and the type of adhesive, ensuring both the initial bonding effect and avoiding damage to fragile boards. The high-precision guided lifting rail 113 ensures that the pressing action is absolutely vertical, without any lateral offset force. This is the core of ensuring that the pressing surface is parallel and the force is uniform. The precise stroke / pressure control of the lifting adjustment block 114 allows for setting the precise final pressing position (or indirectly controlling the pressure) for multi-layer stacks with different total thicknesses, ensuring the pressure required to achieve the best bonding / sealing effect. The die head distributes the pressure evenly to the entire surface of the sheet through a rigid crossbeam, overcoming the common problem of pressure concentration in the center or local areas when using manual or small presses, ensuring that the entire bonding surface (especially the edge sealing area) is subjected to consistent and sufficient force. The pressure provided by mechanical / hydraulic / pneumatic means is far superior to that provided by manual means, ensuring that the adhesive fully fills the gaps at the microscopic level, forming a high-strength, high-sealing adhesive layer.

[0038] This utility model's pressing device achieves continuous conveying of sheet metal through an automated feeding component 102. The guiding adjustment groove 108 and adjustment component in the guiding component 103 ensure precise positioning of sheet metal of different sizes. The lifting adjustment and double roller pressing of the roller pressing component 104 provide initial uniform pressure. The lifting guide rail 113 and lower pressing die head 116 of the pressing component 105 achieve precise and controllable final pressure, thereby significantly improving the pressing efficiency and strength of multi-layer sheet metal, ensuring firm adhesion and meeting the sealing requirements of quicksand standees, and effectively solving the problems of insufficient pressing force and low efficiency of manual pressing.

[0039] In this embodiment of the utility model, the lifting adjustment assembly 111 includes an adjustment mounting plate 117 fixed on the frame 101. The adjustment mounting plate 117 has an adjustment mounting groove 118. An adjustment slider 119 is slidably mounted in the adjustment mounting groove 118. A first threaded connector 120 is mounted on the adjustment mounting plate 117. A first threaded adjustment rod 121 is screwed into the first threaded connector 120. The lower end of the first threaded adjustment rod 121 is rotatably connected to the adjustment slider 119.

[0040] The adjustment mounting groove 118 on the adjustment mounting plate 117 provides a precise linear motion track for the adjustment slider 119, ensuring the verticality and stability of the slider's lifting and lowering, and preventing deviation. The threaded engagement of the first threaded connector 120 and the first threaded adjusting rod 121 constitutes the core fine-tuning mechanism. Rotating the first threaded adjusting rod 121 can precisely control the up-and-down displacement of the adjustment slider 119 within the adjustment mounting groove 118. This threaded transmission method has a self-locking characteristic, which can reliably maintain the set position and prevent unexpected pressure changes due to vibration during the rolling process. At the same time, the first threaded connector 120 itself also serves as a locking device, which can be further tightened after adjustment, providing double protection for locking the position of the adjustment slider 119. This allows for precise and stable setting of the pressure gap or pressure between the second roller 112 and the first roller 110. This structure is not only intuitive and easy to operate, but also significantly improves the accuracy and consistency of pressure control during the rolling stage, ensuring the uniformity and reliability of the initial pressing effect of multi-layer boards, laying a solid foundation for subsequent final pressing, and overcoming the problems of easy loosening and poor accuracy of traditional simple adjustment mechanisms.

[0041] In this embodiment of the present invention, the frame 101 is provided with a transmission assembly 122 that drives the first roller 110 and the second roller 112 to rotate synchronously. The transmission assembly 122 includes a first gear 123 and a second gear 124 respectively fixedly connected to the ends of the first roller 110 and the second roller 112. The first gear 123 and the second gear 124 are sequentially meshed and connected to a first transmission gear 125 and a second transmission gear 126. A first mounting shaft 127 is rotatably mounted on the first transmission gear 125, and a second mounting shaft 128 is rotatably mounted on the second transmission gear. The first mounting shaft 127 and the second transmission gear 128 are connected to each other. A first connecting plate 129 is installed between the rollers, and the two ends of the first connecting plate 129 are rotatably connected to the first mounting shaft 127 and the first roller, respectively. A second connecting plate 130 is installed between the second mounting shaft 128 and the second roller, and the two ends of the second connecting plate 130 are rotatably connected to the second mounting shaft 128 and the second roller, respectively. A third connecting plate 131 is installed between the first mounting shaft 127 and the second mounting shaft 128, and the two ends of the third connecting plate 131 are rotatably connected to the first mounting shaft 127 and the second mounting shaft 128, respectively. A servo motor component 132 that drives the first roller 110 to rotate is installed on the frame 101.

[0042] As shown in the figure, the transmission assembly 122, through the coordinated design of a precise gear meshing system and a floating linkage mechanism, achieves the dual advantages of synchronous operation of the two rollers and dynamic pressure self-adaptation. The four-stage gear meshing structure (first gear 123 → first transmission gear 125 → second transmission gear 126 → second gear 124) ensures that the rotational speeds of the first roller 110 and the second roller 112 are strictly synchronized, completely eliminating the sheet metal pulling or relative sliding caused by speed differences, and ensuring the uniformity and surface quality of the initial pressing; while the innovative three-connecting plate floating structure ( The first and second connecting plates 130 are respectively hinged to the mounting shaft and the corresponding roller, and the third connecting plate 131 is hinged to the two mounting shafts, forming a dynamic parallelogram linkage mechanism. This mechanism ensures that the meshing gear pairs maintain a constant center distance and meshing depth when the second roller 112 is adjusted for lifting. This avoids the risks of gear jamming, wear, or tooth stripping caused by adjusting the clearance in traditional rigid transmission. With the precise drive of the servo motor 132, the rolling speed can be flexibly controlled to adapt to different materials and adhesive properties, and its high torque output ensures sufficient and stable power during the pressing process.

[0043] In this embodiment of the utility model, at least two of the first, second and third connecting plates 131 are symmetrically installed on both sides of the first transmission gear 125 and the second transmission gear 126, respectively.

[0044] The redundant reinforcement design with symmetrical arrangement on both sides significantly improves the rigidity, stability and reliability of the transmission system: At least two first connecting plates 129, second connecting plates 130 and third connecting plates 131 are symmetrically installed on both sides of the first transmission gear 125 and the second transmission gear 126, forming a double parallel parallel quadrilateral linkage mechanism. This changes the force distribution of the gear meshing transmission from single-sided bearing to balanced load on both sides, effectively suppressing torsional vibration and radial runout generated during high-speed operation or high-load pressing. The symmetrical linkage system greatly enhances the bending stiffness and torsional strength of the connection structure between the mounting shaft and the roller, completely eliminating the risk of structural deformation, gear meshing misalignment or shaft instability that may be caused by single-sided connection. At the same time, the double-sided redundant support provides a fault safety margin for the transmission chain. Even if the single-sided connecting part is abnormal, it will not affect the short-term operation of the system, significantly reducing the probability of unexpected downtime.

[0045] In this embodiment of the utility model, a second threaded connector 133 is fixedly installed on the crossbeam 115, and a second threaded adjusting rod 134 is screwed into the second threaded connector 133. The lower end of the threaded adjusting rod is rotatably connected to the lower pressing die head 116.

[0046] The precise control of the stroke of the pressing die 116 and the optimization of pressure uniformity are achieved through a threaded precision micro-adjustment mechanism. The second threaded connector 133 is fixedly installed on the crossbeam 115 and forms a rigid adjustment pair with the threaded second threaded adjusting rod 134. By rotating the second threaded adjusting rod 134, the vertical height of the pressing die 116 relative to the crossbeam 115 can be precisely micro-adjusted, so that the pressing assembly 105 can flexibly set the optimal pressing stroke according to the stacking of plates of different thicknesses and layers. The inherent self-locking characteristics of the threaded drive ensure that the die is firmly locked under high pressure, completely avoiding displacement deviation caused by vibration during the pressing process. At the same time, the rotational connection design between the lower end of the threaded adjusting rod and the pressing die 116 cleverly decouples the motion relationship between rotational adjustment and vertical pressing, ensuring the smoothness of the adjustment operation and ensuring that the die always maintains a pure vertical downward pressure transmission during pressing, eliminating eccentric torque and ensuring that the pressure is evenly distributed to the entire surface of the plate.

[0047] In this embodiment of the present invention, the material guiding adjustment component 109 includes a T-shaped mounting block that slides within the material guiding adjustment groove 108 and a material guiding rod 136 mounted on the T-shaped mounting block. A screw adjusting component 137 is screwed between the T-shaped mounting block and the material guiding rod 136.

[0048] Through the collaborative design of a modular sliding structure and a simplified adjustment mechanism, efficient and precise positioning and stable locking of the guide rod 136 are achieved. The core T-shaped mounting block and the guide adjustment groove 108 form a self-locking and anti-dislodgement sliding fit, which not only ensures smooth lateral movement but also effectively resists accidental displacement caused by vibration. The screw adjustment component 137 is directly screwed between the T-shaped mounting block and the guide rod 136. By tightening, the vertical angle and horizontal position of the guide rod 136 can be locked with one click, achieving millimeter-level precision positioning fine adjustment. This design simultaneously completes the rapid translation, angle calibration, and rigid fixation of the guide rod 136 with a minimalist mechanical structure, completely solving the defects of cumbersome adjustment and easy loosening of traditional guide mechanisms. It significantly improves the positioning adaptability to different sized plates and the efficiency of production switching, providing a stable and reliable plate alignment guarantee for subsequent pressing processes.

[0049] In this embodiment of the present invention, the feeding assembly 102 includes a feeding mounting rod 138 that extends from the front end of the frame 101 and is fixedly attached to the feeding mounting rod 138, and the feeding roller 106 is mounted on the feeding mounting rod 138.

[0050] By directly mounting the feeding roller 106 onto the feeding mounting rod 138 that is fixed to and extends from the front end of the frame 101, the space of the feeding station is moved forward, effectively freeing up the internal space of the frame 101 and providing more ample layout area for the material guiding, rolling and pressing components 105, thus avoiding mechanical interference.

[0051] In this embodiment of the present invention, a lifting cylinder 139 for driving the lifting adjustment block 114 to adjust up and down is fixed on the frame 101;

[0052] A lifting cylinder 139 is fixed on the frame 101 to directly drive the lifting adjustment block 114. Utilizing the characteristics of rapid response, smooth operation, and constant output force of the pneumatic system, the lifting process of the lower pressing die head 116 combines high speed and smoothness, significantly improving the pressing operation cycle. The stroke and pressure of the cylinder can be precisely digitally set through the air circuit regulating valve, which can flexibly adapt to the pressing stroke and final pressure required for plates of different thicknesses. In particular, it can achieve precise pressure holding control for quicksand stand plates with strict sealing requirements.

[0053] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pressing device for a multi-layered signboard, characterized in that, The machine includes a frame (101), on which a feeding assembly (102), a guiding assembly (103), a roller pressing assembly (104), and a pressing assembly (105) are arranged longitudinally in sequence. The feeding assembly (102) includes a feeding roller (106) rotatably mounted on the frame (101). The material guiding assembly (103) includes a material guiding plate (107) fixed on the frame (101), a material guiding adjustment groove (108) is provided laterally on the material guiding plate (107), and a material guiding adjustment assembly (109) is installed in the material guiding adjustment groove (108). The roller pressing assembly (104) includes a first roller (110) rotatably mounted on a frame (101), a lifting adjustment assembly (111) fixedly mounted on the frame (101), and a second roller (112) rotatably mounted on the lifting adjustment assembly (111) to press against the first roller (110). The pressing assembly (105) includes a lifting guide rail (113) fixedly mounted on the frame (101), a lifting adjustment block (114) slidably mounted on the lifting guide rail (113), a crossbeam (115) fixedly mounted on the lifting adjustment block (114), and a lower pressing die (116) for performing pressing operations mounted on the lower end of the crossbeam (115).

2. The pressing device for a multi-layered signboard according to claim 1, characterized in that, The lifting adjustment assembly (111) includes an adjustment mounting plate (117) fixed on the frame (101). An adjustment mounting groove (118) is provided on the adjustment mounting plate (117). An adjustment slider (119) is slidably installed in the adjustment mounting groove (118). A first threaded connector (120) is installed on the adjustment mounting plate (117). A first threaded adjusting rod (121) is screwed into the first threaded connector (120). The lower end of the first threaded adjusting rod (121) is rotatably connected to the adjustment slider (119).

3. The pressing device for a multi-layer structure signboard according to any one of claims 1-2, characterized in that, The frame (101) is provided with a transmission assembly (122) that drives the first roller (110) and the second roller (112) to rotate synchronously. The transmission assembly (122) includes a first gear component (123) and a second gear component (124) respectively fixedly connected to the ends of the first roller (110) and the second roller (112). The first gear component (123) and the second gear component (124) are sequentially meshed and connected to a first transmission gear (125) and a second transmission gear (126). A first mounting shaft (127) is rotatably mounted on the first transmission gear (125), and a second mounting shaft (128) is rotatably mounted on the second transmission gear. The first mounting shaft (127) and the first roller are connected to each other. A first connecting plate (129) is installed between the first mounting shaft (127) and the first roller, respectively. A second connecting plate (130) is installed between the second mounting shaft (128) and the second roller, respectively. A third connecting plate (131) is installed between the first mounting shaft (127) and the second mounting shaft (128), respectively. A servo motor (132) that drives the first roller (110) to rotate is installed on the frame (101).

4. The pressing device for a multi-layered signboard according to claim 3, characterized in that, The first, second and third connecting plates (131) are symmetrically installed on both sides of the first transmission gear (125) and the second transmission gear (126).

5. A pressing device for a multi-layered signboard according to claim 1, 2, or 4, characterized in that, A second threaded connector (133) is fixedly installed on the crossbeam (115), and a second threaded adjusting rod (134) is screwed into the second threaded connector (133). The lower end of the threaded adjusting rod is rotatably connected to the lower pressure die head (116).

6. The pressing device for a multi-layered signboard according to claim 5, characterized in that, The material guiding adjustment assembly (109) includes a T-shaped mounting block that slides within the material guiding adjustment groove (108) and a material guiding rod (136) mounted on the T-shaped mounting block. A screw adjusting element (137) is screwed between the T-shaped mounting block and the material guiding rod (136).

7. The pressing device for a multi-layered signboard according to claim 6, characterized in that, The feeding assembly (102) includes a feeding mounting rod (138) fixedly extending from the front end of the frame (101), and the feeding roller (106) is mounted on the feeding mounting rod (138).

8. The pressing device for a multi-layered signboard according to claim 7, characterized in that, The frame (101) is fixed with a lifting cylinder (139) for driving the lifting adjustment block (114) to adjust up and down.

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