Full-automatic hot melt adhesive spraying device and spraying method

Abstract

The invention discloses a full-automatic hot melt adhesive spraying device and method, and relates to the technical field of hot melt adhesive spraying, the full-automatic hot melt adhesive spraying device comprises a base and a control module, the upper side of the base is fixedly connected with a stand column, the upper side of the stand column is fixedly connected with a top plate, and the upper side of the top plate is slidably connected with a moving beam; according to the device, the fault prevention mechanism composed of the connecting frame, the laser ranging module and the heating piece is arranged, the fault prevention mechanism is made to move along with the glue pump, the laser ranging module detects signal changes generated when glue lines are sprayed earlier than the glue pump, the glue lines are sprayed, and the fault prevention mechanism is driven to move along with the glue pump. And the trigger heating sheet is used for performing precise local secondary heating on the initial section of the cooled glue line, so that the surface of the glue line is remelted, and the device has the characteristics of high practicability and capability of avoiding reduction of sealing quality caused by time difference of gluing.

Description

Technical Field

[0001] This invention relates to the field of hot melt adhesive spraying technology, specifically to a fully automatic hot melt adhesive spraying device and spraying method. Background Technology

[0002] In the field of electrochemical energy, such as the manufacturing of flow batteries or fuel cells, the core power unit stack is composed of several single cells stacked repeatedly. Each single cell usually contains multiple precision components such as bipolar plates, electrodes, electrode frames, and ion exchange membranes or proton exchange membranes. In order to ensure that the electrolyte or reactant gas does not leak during long-term operation of the stack and to ensure efficient ion conduction, all these components are required to form a highly reliable and long-term stable seal at their contacting edge areas after stacking and assembly. Currently, the most common sealing solution in the industry is to use pre-formed elastomeric gaskets, such as nitrile rubber or silicone gaskets. Although this method is widely used, it has several inherent drawbacks: First, as an independent component, the development, production, and quality management of the gasket itself increase additional costs and complexity; second, during manual or semi-automatic assembly, the gasket is prone to misalignment, wrinkling, or even being squeezed out of the sealing groove, leading to sealing failure and becoming one of the key factors causing battery performance degradation and shortened lifespan; third, as battery design develops towards higher power density, the sealing structure becomes increasingly sophisticated and complex, and traditional gaskets face significant technical challenges in ultra-thin or miniaturized designs. To overcome the limitations of gasket sealing, hot melt adhesive spraying technology has begun to attract attention as a potential alternative. This technology involves directly spraying molten hot melt adhesive onto the sealing surface of components such as electrode frames, then pressing it with adjacent components, and curing it to form an integrated sealing structure. Theoretically, it has advantages such as eliminating the need for independent gaskets, high design flexibility, and ease of automation. A Chinese patent with publication number CN103801484A discloses a glue applicator and a glue application method. This device can automatically apply glue evenly from a plane or inclined plane onto a set trajectory. The glue does not drip or overflow, has high adhesion strength, and high sealing performance, thus achieving dustproof, shockproof, and waterproof effects, and can also save material costs. However, when this type of hot melt adhesive spraying technology is actually applied to the precision manufacturing of battery stacks, a series of technical problems still need to be solved: First, there is the problem of joint quality. When continuously spraying a closed sealing ring, due to the cooling time difference between the beginning and end of the glue line, the glue line sprayed first has already begun to solidify, and the hot glue that arrives later is difficult to completely fuse with it. It is very easy to form microscopic faults or weak interfaces at this point, which become weak links in the seal. Second, there is the problem of the quality of the glue inside. The glue line formed by spraying may contain tiny air bubbles, and its surface flatness and density are difficult to guarantee, which directly affects the final sealing pressure and contact area. Therefore, there is an urgent need in this field for a fully automated hot melt adhesive spraying method and apparatus that can avoid the degradation of sealing quality caused by the time difference in adhesive application, so as to achieve efficient, highly consistent and highly reliable battery stack sealing manufacturing. Summary of the Invention

[0003] The purpose of this invention is to provide a fully automatic hot melt adhesive spraying device and spraying method to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fully automatic hot melt adhesive spraying device, including a base and a control module, wherein a column is fixedly connected to the upper side of the base, a top plate is fixedly connected to the upper side of the column, a moving beam is slidably connected to the upper side of the top plate, the moving beam is connected to the top plate through a linear motor, and the slider is connected to the moving beam through a linear motor. A slider is slidably connected to the upper side of the movable beam, a slide frame is fixedly connected to the front side of the slider, a lifting plate is slidably connected to the inner wall of the slide frame, a glue pump is fixedly connected to the lower side of the lifting plate, a lifting motor is fixedly connected to the upper side of the slide frame, a threaded rod is fixedly connected to the output end of the lifting motor, and the outer wall of the threaded rod is threadedly connected to the inner wall of the lifting plate. The lifting motor is electrically connected to the control module, and the lifting motor is used to drive the threaded rod to rotate and the lifting plate to rise and fall. The rear side of the carriage is also provided with an anti-fracture mechanism, which includes: The assembly includes a laser ranging module and a vibration mechanism, wherein the laser ranging module is used to detect the distance between the lower side of the laser ranging module and the surface of the hot melt adhesive. The vibration mechanism includes a transmission assembly and a vibrator, the vibrator being used to generate vibration.

[0005] According to the above technical solution, a groove is provided on the upper side of the base, and a placement plate is provided inside the groove. The outer wall of the placement plate is in contact with the inner wall of the groove. A pressure spring is fixedly connected to the lower side of the placement plate, and the lower end of the pressure spring is fixedly connected to the lower surface of the inner wall of the groove.

[0006] According to the above technical solution, the laser ranging module is electrically connected to the control module, and the upper surface of the placement plate is horizontally set with the lower side of the laser ranging module. The placement plate can move up and down relative to the base.

[0007] According to the above technical solution, the connecting assembly further includes a connecting frame, one side of which is fixedly connected to the upper side of the lifting plate, the other side of which extends to the lower rear side of the slide, the outer wall of the laser ranging module is fixedly connected to the lower rear inner wall of the connecting frame, a heating element is fixedly connected to the lower surface of the connecting frame, and the vibration mechanism is arranged on the upper side of the connecting frame.

[0008] According to the above technical solution, the heating element is electrically connected to the control module. The heating element is used to heat the lower area of ​​the connecting frame. The connecting frame and the laser ranging module are both located on the right side of the glue pump, and the laser ranging module is located on the right side of the connecting frame.

[0009] According to the above technical solution, the transmission assembly includes a fixed frame, the lower side of the outer wall of the fixed frame is fixedly connected to the outer wall of the connecting frame, a lifting spring is fixedly connected to the upper outer wall of the fixed frame, an electric telescopic rod is fixedly connected to the lower end of the lifting spring, a hinge plate is fixedly connected to the lower side of the electric telescopic rod, the outer wall of the hinge plate is slidably connected to the outer wall of the slide, a hinge arm is hinged to the lower side of the hinge plate, a pressure arm is hinged to the lower end of the hinge arm, the upper end of the pressure arm is hinged to the outer wall of the connecting frame, and a pressing pad is fixedly connected to the lower end of the hinge arm.

[0010] According to the above technical solution, the electric telescopic rod is electrically connected to the control module. The electric telescopic rod is used to adjust the height of the hinge plate relative to the slide. The force required for the deformation of the hoisting spring is greater than the weight of the electric telescopic rod, the hinge plate, the hinge arm, and the pressure arm.

[0011] According to the above technical solution, the vibrator is located on the upper side of the hinge plate, and the outer wall of the vibrator is fixedly connected to the outer wall of the hinge plate.

[0012] According to the above technical solution, a fixed hydraulic rod is also fixedly connected to the upper side of the placement plate. The fixed hydraulic rod is electrically connected to the control module. The fixed hydraulic rod is used to fix and clamp the electrode frame, and the outer wall of the fixed hydraulic rod does not contact the outer wall of the base.

[0013] A fully automated hot melt adhesive spraying method includes the following steps: S1. Workpiece fixing and positioning: The electrode frame is automatically clamped and fixed to the placement plate by fixing the hydraulic rod; S2. Automatic precision spraying: Control the moving beam, slider and lifting plate to perform three-axis linkage motion, and at the same time drive the glue pump to move along the sealing surface trajectory of the electrode frame and spray hot melt glue to form a continuous sealing glue line. S3. Joint position prediction and preheating: When the spraying process is about to return to the starting point of the glue line to form a joint, the laser ranging module detects the distance reduction signal caused by the sprayed glue line, and activates the heating element to perform local secondary heating on the cooled glue line segment at the joint. S4. Glue line leveling and densification treatment: After the sealing glue line is sprayed, the electric telescopic rod is pushed down, and the pressing pad is pressed against the electrode frame by the transmission assembly consisting of the hinge plate, hinge arm and pressure arm. Then the vibrator is started to apply high frequency micro-vibration to the electrode frame to promote the flow and leveling of the hot melt glue and the escape of air bubbles. S5. Online assessment of the colloid state: Before and after the vibration treatment in step S4, the height of the sealing glue line at the same position is measured by the laser ranging module to obtain the height H1 before vibration and the height H2 after vibration. S6. Adaptive control of process parameters: Based on the calculated height difference ΔH (ΔH = H1- H2), the leveling and curing state of the hot melt adhesive can be inferred, which is beneficial for adjusting the cooling time in subsequent processes based on this data.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention achieves a high degree of automation of the entire hot melt adhesive spraying process by using a rigid frame consisting of a base, a column, and a top plate, and a precision three-axis motion system consisting of a moving beam, a slider, a carriage, and a lifting plate, in conjunction with a fixed hydraulic rod to automatically clamp the workpiece.

[0015] By setting up an anti-delamination mechanism consisting of a connecting frame, a laser ranging module, and a heating element, and making it move in tandem with the glue pump, the laser ranging module detects the signal change generated by the already sprayed glue line before the glue pump, triggering the heating element to precisely and locally reheat the starting section of the cooling glue line, causing its surface to remelt. This method ensures that when the new glue arrives at the joint, the old and new glue can achieve perfect fusion, fundamentally solving the problem of joint delamination and weak sealing ring caused by the cooling time difference, and ensuring the integrity and reliability of the sealing ring.

[0016] By setting up a vibration mechanism consisting of an electric telescopic rod, a hinge plate, a hinge arm, a pressure arm, and a vibrator, controllable high-frequency micro-vibration can be applied to the workpiece after spraying. Through a unique hinge and lever transmission design, the mechanism efficiently guides the vibration energy to the pressing pad and acts on the workpiece, causing air bubbles in the molten hot melt adhesive to escape and accelerating its flow and flattening, thereby significantly improving the density of the adhesive, surface smoothness, and the final overall sealing quality.

[0017] By incorporating a vibration mechanism, the height change of the adhesive line at the same location can be measured before and after vibration treatment. The control module analyzes this height difference to intelligently infer the real-time leveling characteristics and curing rate of the adhesive. Based on this, subsequent cooling process parameters can be adjusted, achieving closed-loop feedback control of key process links. This upgrades the production process from fixed-sequence control to predictive regulation based on state perception, greatly optimizing the production cycle and ensuring the stability of product quality. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure on the left side of the present invention; Figure 2 This is a schematic diagram of the structure on the right side of the present invention; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the placement plate structure of the present invention; Figure 5 This is a schematic diagram of the anti-fracture mechanism of the present invention; Figure 6 This is a schematic diagram of the vibration mechanism structure of the present invention; In the diagram: 1. Base; 2. Column; 3. Top plate; 4. Moving beam; 5. Slider; 6. Carriage; 7. Lifting plate; 8. Glue pump; 9. Lifting motor; 10. Threaded rod; 11. Anti-fracture mechanism; 12. Placement plate; 13. Pressure spring; 14. Fixed hydraulic rod; 101. Connecting frame; 102. Laser ranging module; 103. Heating element; 104. Vibration mechanism; 401. Fixed frame; 402. Lifting spring; 403. Electric telescopic rod; 404. Hinge plate; 405. Hinge arm; 406. Pressure arm; 407. Pressing pad; 408. Vibrator. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1-4 The present invention provides a technical solution, with a base 1 as the basic load-bearing structure, and a top plate 3 supported by a column 2 above it, forming a sturdy gantry frame. A movable beam 4 that can move in the front and back direction is installed on the top plate 3, and a slider 5 that can move in the left and right direction is assembled on the movable beam 4, thus forming an XY plane motion system. A vertical slide 6 is fixed to the front side of the slider 5. The inner wall of the slide 6 is connected to the upper lifting motor 9 through a lifting plate 7 and a threaded rod 10 to form a Z-axis motion unit. The glue pump 8 installed on the lower side of the lifting plate 7 is the final execution end. At the start of the operation, the electrode frame to be coated is conveyed to the placement plate 12 in the groove of the base 1 by the conveying device in the production line, and is clamped and fixed by the fixed hydraulic rod 14. Then, the control module coordinates the planar movement of the moving beam 4 and the slider 5 with the vertical fine adjustment of the lifting motor 9, driving the glue pump 8 to perform precise three-dimensional movement along the sealing surface trajectory of the electrode frame. At the same time, the glue pump 8 continuously extrudes hot melt glue to form a uniform and continuous sealing glue line. This achieves fully automatic and high-precision operation of electrode frame coating, laying a solid foundation for subsequent processes.

[0021] Example 2: Please refer to Figure 1-6 Based on Embodiment 1, the present invention provides a technical solution: In order to overcome the problem of temperature difference at the joint caused by the cooling time difference at the beginning and end of the glue line, the device is provided with an anti-fracture mechanism 11 on the rear side of the lifting plate 7. The core of this mechanism is to rigidly connect the laser ranging module 102 and the heating plate 103 to the lifting plate 7 through the connecting frame 101, and ensure that the laser ranging module 102 and the heating plate 103 are located on the right side of the glue pump 8. During the movement, the laser ranging module 102 continuously measures the height between its lower side and the upper surface of the electrode frame. When the spraying cycle is about to be completed and the nozzle is about to return to the starting point of the glue line, the laser ranging module 102 will scan the sprayed glue line before the glue pump 8, causing its ranging reading to drop sharply. After this signal is captured by the control module in real time, it immediately triggers the heating element 103 to start. The heat generated by the heating element 103 is quickly conducted to the cooled glue line segment directly below it through thermal radiation, and it performs precise local secondary heating, so that its surface returns to a high temperature state. When the glue pump 8 arrives at the joint area with new glue, the new and old glue can be better fused, which fundamentally eliminates the hidden dangers of interface discontinuity and weak connection caused by temperature difference, and ensures the integrity and reliability of the sealing ring.

[0022] Example 3: Please refer to Figure 1-6 Based on Embodiment 1 and Embodiment 2, the present invention provides the following technical solution: After the spraying is completed, in order to improve the density and surface smoothness of the colloid, the device starts the leveling and densification process. At this time, the vibration mechanism 104 integrated on the upper side of the connecting frame 101 starts to work. This mechanism is supported by the fixed frame 401. After receiving the command, the electric telescopic rod 403 inside it pushes downward, pushing the hinge plate 404 to move down. The downward movement of the hinge plate 404 drives the pressure arm 406 to rotate around its hinge point through the hinge arm 405, so that the pressing pad 407 fixed at the end of the pressure arm 406 is stably pressed on the glue-free area of ​​the electrode frame. Once the clamping state is established, the vibrator 408 installed on the hinge plate 404 is activated. The high-frequency micro-vibration generated is transmitted to the electrode frame body through the efficient path of hinge plate 404, hinge arm 405, pressure arm 406, and pressing pad 407. Since the electrode frame is tightly fixed to the placement plate 12 supported by the pressure spring by the fixed hydraulic rod 14, both the placement plate 12 and the electrode frame will vibrate. This vibration energy causes the air bubbles inside the hot melt adhesive, which is still in a molten state, to escape and accelerate the flow and flattening. The lifting spring 402 effectively isolates most of the vibration from being transmitted to the main body, protecting the precision moving parts.

[0023] Example 4: Please refer to Figure 1-6Based on Embodiments 1, 2 and 3, the present invention provides a technical solution: before the vibration program starts, when the pressing pad (407) has not yet contacted the workpiece, the control module instructs the laser ranging module (102) to perform the first height measurement H1 on the glue line that has just been sprayed and record the data. After the initial height H1 is recorded, the system performs the complete vibration operation according to the process of Embodiment 3. The vibration causes the glue to flow and spread. After the vibration program ends and the pressing pad (407) has been lifted, the control module instructs the laser ranging module (102) to perform a second height measurement H2 at the exact same position and record the data. The algorithm within the control module calculates the height difference between the two measurements, ΔH = H1 - H2. If ΔH is large: it indicates that the height of the glue line drops significantly after vibration, indicating that the glue has good fluidity and a significant spreading effect during vibration. This may mean that the glue temperature is high, the open time is long, and the solidification speed is slow, requiring a longer cooling time to set. If ΔH is small or close to zero, it indicates that the adhesive has poor fluidity during vibration and may be about to gel. This suggests that the adhesive cures quickly under the current process and the cooling time may be sufficient or even too long. The system compares the ΔH value with a preset empirical threshold to determine the state of the adhesive being sprayed.

[0024] Based on this judgment, the control module can dynamically adjust the production cycle, such as prompting to extend or shorten the dwell time of the workpiece in the subsequent cooling station, or facilitating the operator to feed back the data to the upstream glue pump temperature control system to fine-tune the glue temperature to optimize the leveling properties, and issue an alarm for ΔH values ​​that exceed the reasonable range, indicating that there may be glue deterioration or process abnormality. This embodiment employs an online, non-destructive method for monitoring the curing state of adhesives. By comparing the changes in the height of the adhesive line before and after vibration, the leveling characteristics and initial curing speed of the adhesive are inferred, providing data support for optimizing production process parameters.

[0025] A fully automated hot melt adhesive spraying method includes the following steps: S1. Workpiece fixing and positioning: The electrode frame is automatically clamped and fixed on the placement plate 12 by fixing the hydraulic rod 14; S2. Automatic precision spraying: Control the moving beam 4, slider 5 and lifting plate 7 to perform three-axis linkage motion, and at the same time drive the glue pump 8 to move along the sealing surface trajectory of the electrode frame and spray hot melt glue to form a continuous sealing glue line. S3. Joint position prediction and preheating: When the spraying process is about to return to the starting point of the glue line to form a joint, the follow-up laser ranging module 102 detects the distance reduction signal caused by the sprayed glue line, and accordingly starts the heating plate 103 to perform local secondary heating on the cooled glue line segment at the joint. S4. Glue line leveling and densification treatment: After the sealing glue line is sprayed, the electric telescopic rod 403 is pushed down, and the pressing pad 407 is pressed against the electrode frame by the transmission assembly consisting of the hinge plate 404, the hinge arm 405 and the pressure arm 406. Then the vibrator 408 is started to apply high-frequency micro-vibration to the electrode frame to promote the flow and leveling of hot melt glue and the escape of air bubbles. S5. Online assessment of colloid state: Before and after the vibration treatment in step S4, the height of the same position of the sealing glue line is measured by the laser ranging module 102 to obtain the height H1 before vibration and the height H2 after vibration. S6. Adaptive control of process parameters: Based on the calculated height difference ΔH (ΔH=H1-H2), the leveling and curing state of the hot melt adhesive can be inferred, which is beneficial for adjusting the cooling time in subsequent processes based on this data.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fully automatic hot melt adhesive spraying device, comprising a base (1) and a control module, characterized in that: A column (2) is fixedly connected to the upper side of the base (1), a top plate (3) is fixedly connected to the upper side of the column (2), a moving beam (4) is slidably connected to the upper side of the top plate (3), the moving beam (4) is connected to the top plate (3) through a linear motor, and a slider (5) is slidably connected to the upper side of the moving beam (4), the slider (5) is connected to the moving beam (4) through a linear motor; The front side of the slider (5) is fixedly connected to the slide (6), the inner wall of the slide (6) is slidably connected to the lifting plate (7), the lower side of the lifting plate (7) is fixedly connected to the glue pump (8), the upper side of the slide (6) is fixedly connected to the lifting motor (9), the output end of the lifting motor (9) is fixedly connected to the threaded rod (10), and the outer wall of the threaded rod (10) is threadedly connected to the inner wall of the lifting plate (7). The lifting motor (9) is electrically connected to the control module, and the lifting motor (9) is used to drive the threaded rod (10) to rotate and the lifting plate (7) to rise and fall; The rear side of the carriage (6) is also provided with an anti-fracture mechanism (11), which includes: The connection components include a laser ranging module (102) and a vibration mechanism (104), wherein the laser ranging module (102) is used to detect the distance between the lower side of the laser ranging module (102) and the hot melt adhesive surface; The vibration mechanism (104) includes a transmission assembly and a vibrator (408) for generating vibration.

2. The fully automatic hot melt adhesive spraying device according to claim 1, characterized in that: The base (1) has a groove on its upper side, and a placement plate (12) is provided inside the groove. The outer wall of the placement plate (12) is in contact with the inner wall of the groove. A pressure spring (13) is fixedly connected to the lower side of the placement plate (12), and the lower end of the pressure spring (13) is fixedly connected to the lower surface of the inner wall of the groove.

3. The fully automatic hot melt adhesive spraying device according to claim 2, characterized in that: The laser ranging module (102) is electrically connected to the control module, and the upper surface of the placement plate (12) is horizontally set with the lower side of the laser ranging module (102). The placement plate (12) can move up and down relative to the base (1).

4. The fully automatic hot melt adhesive spraying device according to claim 3, characterized in that: The connecting assembly also includes a connecting frame (101), one side of which is fixedly connected to the upper side of the lifting plate (7), the other side of which extends to the lower rear side of the slide (6), the outer wall of the laser ranging module (102) is fixedly connected to the lower rear inner wall of the connecting frame (101), a heating element (103) is fixedly connected to the lower surface of the connecting frame (101), and the vibration mechanism (104) is arranged on the upper side of the connecting frame (101).

5. The fully automatic hot melt adhesive spraying device according to claim 4, characterized in that: The heating element (103) is electrically connected to the control module. The heating element (103) is used to heat the area under the connecting frame (101). The connecting frame (101) and the laser ranging module (102) are both located to the right of the glue pump (8). The laser ranging module (102) is located to the right of the connecting frame (101).

6. The fully automatic hot melt adhesive spraying device according to claim 5, characterized in that: The transmission assembly includes a fixed frame (401), the lower side of the outer wall of the fixed frame (401) is fixedly connected to the outer wall of the connecting frame (101), a lifting spring (402) is fixedly connected to the upper outer wall of the fixed frame (401), an electric telescopic rod (403) is fixedly connected to the lower end of the lifting spring (402), a hinge plate (404) is fixedly connected to the lower side of the electric telescopic rod (403), the outer wall of the hinge plate (404) is slidably connected to the outer wall of the slide (6), a hinge arm (405) is hinged to the lower side of the hinge plate (404), a pressure arm (406) is hinged to the lower end of the hinge arm (405), the upper end of the pressure arm (406) is hinged to the outer wall of the connecting frame (101), and a pressing pad (407) is fixedly connected to the lower end of the hinge arm (405).

7. The fully automatic hot melt adhesive spraying device according to claim 6, characterized in that: The electric telescopic rod (403) is electrically connected to the control module. The electric telescopic rod (403) is used to adjust the height of the hinge plate (404) relative to the slide (6). The force required for the deformation of the hoisting spring (402) is greater than the weight of the electric telescopic rod (403), the hinge plate (404), the hinge arm (405), and the pressure arm (406).

8. The fully automatic hot melt adhesive spraying device according to claim 7, characterized in that: The vibrator (408) is located on the upper side of the hinge plate (404), and the outer wall of the vibrator (408) is fixedly connected to the outer wall of the hinge plate (404).

9. The fully automatic hot melt adhesive spraying device according to claim 8, characterized in that: A fixed hydraulic rod (14) is also fixedly connected to the upper side of the placement plate (12). The fixed hydraulic rod (14) is electrically connected to the control module. The fixed hydraulic rod (14) is used to fix and clamp the electrode frame. The outer wall of the fixed hydraulic rod (14) does not contact the outer wall of the base (1).

10. A fully automatic hot melt adhesive spraying method, used in any one of the fully automatic hot melt adhesive spraying devices according to claims 1-9, characterized in that: Includes the following steps: S1. Workpiece fixing and positioning: The electrode frame is automatically clamped and fixed on the placement plate (12) by fixing the hydraulic rod (14); S2. Automatic precision spraying: Control the moving beam (4), slider (5) and lifting plate (7) to perform three-axis linkage motion, and at the same time drive the glue pump (8) to move along the sealing surface trajectory of the electrode frame and spray hot melt glue to form a continuous sealing glue line. S3. Joint position prediction and preheating: When the spraying process is about to return to the starting point of the glue line to form a joint, the laser ranging module (102) detects the distance reduction signal caused by the sprayed glue line, and starts the heating plate (103) to perform local secondary heating on the cooled glue line segment at the joint. S4. Glue line leveling and densification treatment: After the sealing glue line is sprayed, the electric telescopic rod (403) is pushed down, and the pressing pad (407) is pressed against the electrode frame by the transmission assembly consisting of the hinge plate (404), the hinge arm (405) and the pressure arm (406). Then the vibrator (408) is started to apply high-frequency micro-vibration to the electrode frame to promote the flow and leveling of the hot melt glue and the escape of air bubbles. S5. Online assessment of the colloid state: Before and after the vibration treatment in step S4, the height of the same position of the sealing glue line is measured by the laser ranging module (102) to obtain the height H1 before vibration and the height H2 after vibration. S6. Adaptive control of process parameters: Based on the calculated height difference ΔH (ΔH = H1 - H2), the leveling and curing state of the hot melt adhesive can be inferred, which is beneficial to adjust the cooling time in subsequent processes based on this data.

Images