A gluing device of a glue pulling machine for COB lamp strip production

Abstract

The application discloses a glue feeding device of a glue pulling machine for COB lamp strip production, which comprises a rack, a mixing box installed on the rack and communicated with a glue tank of the glue pulling machine, and a feeding opening is arranged on the top of the mixing box and a sealing plug is installed on the feeding opening for sealing the feeding opening. The glue feeding device further comprises a defoaming stirring mechanism for stirring glue material, a pressurizing unit for pressurizing the mixing box so that glue in the mixing box can enter the glue tank of the glue pulling machine, and a controller connected with a servo motor and the pressurizing unit. The glue feeding device solves the root problem of "secondary bubbles", and glue can be transferred and poured from mixing and defoaming to the glue pulling machine without manual operation, so that the manual operation strength and the risk of mistakes are reduced. In addition, a multiple bubble elimination mechanism is formed during the preparation of glue in the mixing box, the yield of lamp strips in the glue feeding process is improved, offline batch production is changed into online continuous supply, the downtime is greatly reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of COB LED strip production equipment technology, and more specifically, to a gluing device for a glue-applying machine used in COB LED strip production. Background Technology

[0002] COB LED strips, as an advanced light source product, are widely used in indoor and outdoor lighting, advertising decoration, and automotive lighting due to their advantages such as high brightness, soft light, no graininess, and compact size. A key step in the manufacturing process of COB LED strips is to fix and seal the packaged chip circuit board (i.e., the COB LED board) to a predetermined position on a flexible printed circuit board (FPC) using adhesive to form a complete LED strip. This adhesive application process typically uses a glue-applying machine. The glue-applying process of a COB LED strip glue-applying machine begins with offline glue preparation. This involves mixing and degassing the main components, such as epoxy resin, and the curing agent in a centrifugal degassing mixer according to a precise ratio to eliminate air bubbles that could cause pinhole defects. The prepared glue is then injected into the glue tank (or pressure tank) of the glue-applying machine, which is typically insulated (e.g., with a heating jacket) to maintain the stability of the glue viscosity. Simultaneously, the container is connected to a pressure source, which applies a constant positive pressure to help transport the glue to the outlet. Driven by air pressure, the adhesive enters a metering pump (such as a gear pump) whose speed is precisely regulated by a control system, achieving a quantitative supply. It is then transported through an insulated pipe to the slit-type adhesive applicator. Simultaneously, the COB LED strip roll passes precisely beneath the adhesive applicator at a constant speed via an unwinding and traction mechanism. When the adhesive application process begins, the adhesive flows evenly from the slit of the applicator, forming an adhesive curtain. This curtain is then "scraped" away by the uniformly passing LED strip through pre-set tiny gaps, ultimately covering the designated area of ​​the LED panel with a uniformly thick and precisely wide adhesive layer.

[0003] However, in existing technologies, even if centrifugal degassing is performed during glue preparation, the glue inevitably undergoes pouring, impact, and flow during the transfer from the mixing tank of the centrifugal degassing mixer to the glue tank (or pressure tank) of the glue applicator. These processes re-entrain air into the glue, generating "secondary air bubbles." If these secondary air bubbles are not completely eliminated in the glue tank, they will enter the delivery pipes and glue applicator with the glue. When these air bubbles reach the slit outlet, they can cause discontinuous glue dispensing in certain areas, resulting in "glue breaks" or "glue marks" on the LED strip, causing product defects. Furthermore, glue injection is an offline, batch-based operation. When a tank of glue is used up, the machine must be stopped for replacement, affecting production continuity. The glue injection process usually requires operators to handle and pour the glue, increasing the workload for workers and introducing the risk of operational errors (such as spillage, contamination, incomplete injection, etc.). Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a gluing device for a glue-stretching machine for COB LED strip production.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A gluing device for a COB LED strip production glue-stretching machine includes a frame and a mixing tank mounted on the frame. The top of the mixing tank includes a feeding port, and a sealing plug is installed on the feeding port for sealing the feeding port. The gluing device also includes a degassing stirring mechanism for stirring the glue material, a pressurizing unit for pressurizing the mixing tank to facilitate the glue entering the glue tank of the glue-stretching machine, and a controller connected to a servo motor and the pressurizing unit. The mixing tank is provided with an insulation sleeve.

[0007] The degassing and stirring mechanism includes a degassing and stirring device rotatably connected in the mixing tank and a servo motor for driving the degassing and stirring device to rotate. The degassing and stirring device includes at least one layer of blades located below the liquid surface of the adhesive material. The rotation axis of the blades forms an angle of 10° to 45° with the horizontal plane to form an axial circulation flow from top to bottom during stirring.

[0008] The top of the mixing tank also includes a vacuum port and a pressurization port. The vacuum port is connected to an external vacuum device through a pipe to create a negative pressure environment of -0.05MPa to -0.08MPa inside the mixing tank. The pressurization port is connected to a pressurization unit through a pipe. A pressure gauge for monitoring the pressure inside the mixing tank is also installed on the top of the mixing tank. The pressure gauge is electrically connected to the external vacuum device through a controller.

[0009] The bottom of the mixing tank is connected to a guide pipe with a valve. The output end of the guide pipe is connected to the glue tank on the glue stretching machine, and the input end of the guide pipe is detachably connected to the bottom of the mixing tank.

[0010] The invention is further configured such that a connecting pipe is connected to the bottom of the mixing box, a nut is rotatably connected to the input end of the guide pipe via a bearing, the nut is threadedly connected to the connecting pipe, the bottom of the mixing box is inclined toward the connecting pipe, and a precision filter is provided at the input end of the guide pipe, the precision filter having a filtration accuracy of 100 to 400 mesh.

[0011] The present invention is further configured such that the inner top surface of the mixing box is a downwardly convex dome structure.

[0012] The invention is further configured such that the pressurization unit is a nitrogen cylinder with a regulating valve.

[0013] The present invention is further configured such that the heat insulation sleeve is provided with a heating element and a temperature sensor controlled by a controller.

[0014] The invention is further configured such that the servo motor is mounted on the top of the mixing tank, the rotating shaft of the stirring and deaerator passes through the top of the mixing tank and is fixedly connected to the output end of the servo motor, and the rotating shaft of the stirring and deaerator is rotatably connected to the top of the mixing tank through a sealed bearing.

[0015] The present invention is further configured such that the frame is provided with casters for easy movement.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0017] 1. By directly connecting the mixing tank and the glue tank via a guide pipe, a completely closed glue delivery system is constructed under the action of a pressurization unit. From mixing and degassing to delivery to the glue-extension machine, the glue never needs to be exposed to air, fundamentally eliminating the possibility of air being trapped due to operations such as "pouring, impact, and flow," thus solving the root cause problem of "secondary air bubbles." Furthermore, the glue does not require manual transfer or pouring from mixing and degassing to delivery to the glue-extension machine, reducing the intensity of manual operation and the risk of error.

[0018] 2. The use of blades at a specific angle of 10° to 45° with the horizontal plane creates a "top-down axial circulation flow" during the rotation and stirring process. This effectively disperses air bubbles while preventing the formation of surface vortices that could engulf new air bubbles. At the same time, it forces surface air bubbles into the deeper parts of the liquid for processing. Combined with a negative pressure environment that causes residual microbubbles in the mixing tank to expand rapidly, rise, and burst, and with the interception at the end of the precision filter, a multi-layered air bubble elimination mechanism is formed, improving the degassing effect and increasing the yield of the LED strip in the gluing process.

[0019] 3. By pre-filling the glue tank with glue in the mixing tank when the glue in the glue tank is almost depleted, the glue tank's insulation design ensures the stability of the glue viscosity. The mixing tank's glue preparation does not affect the use of the glue tank, thus transforming offline batch production into online continuous supply, significantly reducing downtime and improving production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the vacuum interface and pressurization interface on the mixing tank.

[0022] Figure 3 This is a schematic diagram of a single-layer blade.

[0023] Figure 4 This is a schematic diagram of the controller's control flow.

[0024] In the diagram: Frame 100, Mixing box 1, Feeding port 11, Sealing plug 12, Insulation jacket 13, Stirring and degassing device 2, Servo motor 3, Paddle 21, Vacuum interface 14, Pressurization interface 15, Pressure gauge 17, Feed guide pipe 4, Connecting pipe 18, Nut 41, Precision filter 5, Nitrogen cylinder 6, Heating element 131, Casters 1001. Detailed Implementation

[0025] Reference Figures 1 to 4 The embodiments of the present invention will be further described below.

[0026] A gluing device for a COB LED strip production glue-stretching machine includes a frame 100 and a mixing tank 1 mounted on the frame 100. The frame 100 is equipped with casters 1001 for easy movement, thereby enabling the gluing device of the present invention to move flexibly between different glue-stretching machine stations and achieve multi-purpose use. The top of the mixing tank 1 includes a feeding port 11, and a sealing plug 12 for sealing the feeding port 11 is installed on the feeding port 11. The bottom of the mixing tank 1 is connected to a guide pipe 4 with a valve. The output end of the guide pipe 4 is connected to the glue tank on the glue-stretching machine, and the input end of the guide pipe 4 is detachably connected to the bottom of the mixing tank 1. A precision filter 15 is provided at the input end of the guide pipe 4. The precision filter 15 has a filtration accuracy of 100 to 400 mesh. The precision filter 15 is located at the connection between the guide pipe 4 and the bottom connecting pipe 18 of the mixing tank 1. Specifically, the filter shell of the precision filter 15 is clamped between the end face of the guide pipe 4 and the end face of the connecting pipe 18.

[0027] The gluing device also includes a degassing and stirring mechanism for mixing the glue material, a pressurizing unit for pressurizing the mixing tank 1 to facilitate the glue entering the glue tank of the glue spreading machine, and a controller connected to the servo motor 3 and the pressurizing unit. The pressurizing unit is a nitrogen cylinder 16 with a regulating valve, and the regulating valve is a solenoid valve electrically connected to the controller. An insulation sleeve 13 is provided outside the mixing tank 1. The insulation sleeve 13 is equipped with a heating element 131 and a temperature sensor (not shown in the figure) controlled by the controller.

[0028] The controller can be a programmable logic controller (PLC) or microprocessor system conventional in the art, which internally stores a control program for receiving input signals from the pressure gauge 17 and temperature sensor, and controlling the operation of the servo motor 3, external vacuum equipment, solenoid valve of the pressurization unit, and heating element 131 accordingly. Programming this control program is a conventional skill that can be achieved by those skilled in the art based on the control logic disclosed in this specification.

[0029] The degassing and stirring mechanism includes a degassing and stirring device 2 rotatably connected in the mixing tank 1 and a servo motor 3 for driving the degassing and stirring device 2 to rotate. The degassing and stirring device 2 includes at least one layer of blades 21 located below the liquid surface of the adhesive material. The rotation axis of the blades 21 forms an angle of 10° to 45° with the horizontal plane to form an axial circulation flow from top to bottom during stirring.

[0030] The top of the mixing tank 1 also includes a vacuum port 14 and a pressurization port 15. The vacuum port 14 is connected to an external vacuum device via a pipe to create a negative pressure environment of -0.05MPa to -0.08MPa inside the mixing tank 1. Connecting to the external vacuum device via the vacuum port 14 constitutes a key component in achieving the negative pressure degassing environment inside the mixing tank 1. The pressurization port 15 is connected to a pressurization unit via a pipe. A pressure gauge 17 for monitoring the pressure inside the mixing tank 1 is also installed on the top of the mixing tank 1. The pressure gauge 17 is electrically connected to the external vacuum device via a controller, which is configured to control the start and stop of the external vacuum device based on the feedback signal from the pressure gauge 17. The external vacuum device (not shown in the attached diagram) connected to the vacuum port 14 via a pipe is existing technology (such as common vacuum pumps, vacuum generators, etc.). Those skilled in the art know what this is and can purchase it on the market or assemble a system capable of meeting a vacuum level of -0.05MPa to -0.08MPa based on prior knowledge.

[0031] Working principle: Before feeding, the feed pipe 4 is detached from the connecting pipe 18 and the output end of the connecting pipe 18 is sealed with a cap that is threaded to the connecting pipe 18. The operator unscrews the sealing plug 12 of the feeding port 11 and feeds the prepared glue material into the mixing tank 1 through the feeding port 11. Tighten the sealing plug 12 to ensure the initial sealing of the mixing tank 1.

[0032] The servo motor 3 is started to drive the stirring and degassing device 2 to rotate, performing preliminary pre-stirring to ensure uniform mixing of all components. An external vacuum device (such as a vacuum pump) is started to evacuate the sealed mixing tank 1 through the vacuum port 14. The pressure gauge 17 monitors the pressure inside the tank in real time and transmits the detected pressure signal to the controller. The controller compares the set pressure range (-0.05MPa to -0.08MPa) with the measured pressure value and controls the start / stop or power of the external vacuum device, such as the vacuum pump, to maintain the pressure inside the mixing tank 1. When the pressure reaches and is maintained at a negative pressure environment of -0.05MPa to -0.08MPa, negative pressure degassing is performed. Specifically, under negative pressure, the microbubbles dissolved in the adhesive and the bubbles generated by stirring will rapidly expand due to the decrease in external pressure, increasing their volume and significantly increasing their buoyancy. According to Stokes' Law, the rising speed of a bubble is proportional to the square of its radius. Therefore, the expanded bubble will rise to the liquid surface at an extremely high speed and burst, thus achieving efficient degassing.

[0033] Meanwhile, the servo motor 3 continues to operate. Because its rotation axis forms a specific angle of 10° to 45° with the horizontal plane, the impeller 21 of the agitator deaerator 2 does not primarily generate radial flow (which easily forms vortices) when rotating, unlike the vertical impeller 21. Instead, it generates a powerful axial circulating flow from top to bottom. This flow field effectively avoids the generation of strong vortices at the center of the liquid surface, thus preventing vortices from re-entraining air into the liquid and eliminating the generation of new bubbles at the source. Furthermore, the axial circulating flow forcibly carries the bubbles on the liquid surface downwards into the deeper layers of the liquid. As these bubbles pass through the impeller 21 area, they are subjected to strong shear forces and broken into smaller microbubbles. These broken microbubbles expand and float more easily in a negative pressure environment, forming a synergistic effect of "mechanical agitation and breakage" and "negative pressure promoting their floating and rupture," constituting a dual bubble elimination mechanism.

[0034] After the degassing process is completed, the external vacuum equipment is turned off, and the feed pipe 4 is installed on the connecting pipe 18 via nut 41 to facilitate subsequent glue delivery. The regulating valve of the pressurization unit (nitrogen cylinder 16) is opened to introduce clean, dry nitrogen into the mixing tank 1, applying a positive pressure higher than atmospheric pressure. At this time, the valve on the feed pipe 4 is opened. Driven by the positive pressure, the degassed glue is smoothly "pushed" into the glue tank of the glue-extension machine through the feed pipe 4. This ensures that the glue, from mixing and degassing to delivery to the glue-extension machine, does not need to be exposed to air throughout the entire process, fundamentally eliminating the possibility of air being trapped due to operations such as "pouring, impact, and flow," solving the root cause problem of "secondary bubbles." Furthermore, the glue does not require manual transfer or pouring from mixing and degassing to delivery to the glue-extension machine, reducing the intensity of manual operation and the quality risks caused by human error (such as improper pouring or introduction of contaminants).

[0035] Because the viscosity of adhesive is highly sensitive to temperature, temperature fluctuations directly cause changes in adhesive viscosity, thus affecting the amount of adhesive applied, the uniformity of coating, and the adhesion of the COB LED strip. The insulation sleeve 13, along with the heating element 131 and a temperature sensor, maintains the adhesive in the mixing tank 1 within a set optimal temperature range. The temperature sensor monitors the temperature in real time and feeds the signal back to the controller, which then precisely controls the operation of the heating element 131, forming a closed-loop control system. This achieves automated and precise temperature management, reduces human intervention, and ensures a constant adhesive viscosity within the mixing tank 1.

[0036] Before the glue in mixing tank 1 enters the glue tank, it flows through precision filter 15 (100-400 mesh). Precision filter 15 intercepts trace amounts of gel particles or impurities that may be generated during mixing and conveying. This is the second mechanism for eliminating air bubbles and impurities. The filter element of precision filter 15 can use common filter materials such as stainless steel sintered metal mesh or polymer filter membrane. When it becomes clogged or requires regular maintenance, simply loosen nut 41 to separate the feed tube 4 from the connecting tube 18 to remove precision filter 15 for cleaning or replacement, ensuring filtration effectiveness.

[0037] In summary, this invention employs a paddle 21 at a specific angle of 10° to 45° to the horizontal plane, causing the paddle 21 to form a "top-down axial circulation flow" during rotation and stirring. This effectively disperses air bubbles, prevents the formation of liquid surface vortices that could engulf new air bubbles, and forces surface air bubbles into the deeper parts of the liquid for processing. Combined with a negative pressure environment that causes residual microbubbles in the mixing tank 1 to rapidly expand, rise, and burst, and with the final interception of the precision filter 15, a multi-layered air bubble elimination mechanism is formed, improving the debubbling effect and increasing the yield of the LED strip in the gluing process.

[0038] When the glue in the glue tank is about to run out, the next batch of glue can be prepared in advance in the mixing tank 1 to continuously supply the glue tank line. The heat preservation design of the glue tank ensures that the viscosity of the prepared glue is stable. The mixing tank 1 does not affect the use of the glue tank when preparing glue. The process of conveying glue from the mixing tank 1 to the glue tank is fast and clean, with almost no interruption to the production of the glue stretching machine. It transforms offline batch production into online continuous production, greatly reducing downtime and improving production efficiency.

[0039] The bottom of the mixing box 1 is connected to a connecting pipe 18. The input end of the guide pipe 4 is rotatably connected to a nut 41 through a bearing. The nut 41 rotates around the axis of the guide pipe 4 and is threadedly connected to the connecting pipe 18. The bottom of the mixing box 1 is inclined toward the connecting pipe 18.

[0040] The feed pipe 4 is detachably connected to the connecting pipe 18 via a nut 41, allowing the feed pipe 4 and the precision filter 15 on it to be easily removed from the mixing box 1 for cleaning, filter replacement or maintenance, ensuring long-term stable operation and hygiene requirements of the system.

[0041] The bottom of the mixing tank 1 is inclined towards the connecting pipe 18, forming a structure similar to a "cone bottom". During pressurized discharge, this structure can use gravity to allow the glue to flow naturally to the outlet, avoiding the accumulation of glue in the corners of the tank bottom. This ensures that all glue can be discharged smoothly, reducing material waste and preventing residual glue from curing and affecting the quality of the next batch of materials.

[0042] The inner top surface of the mixing tank 1 is a downward-protruding dome structure. Unlike a flat top, the dome structure lacks right-angled areas; its smooth curved surface better guides axial circulation, making the glue flow more smoothly and helping to eliminate potential mixing dead zones at the top, ensuring thorough mixing and degassing throughout the glue. During the vacuum degassing stage, rising air bubbles converge towards the highest point (center) along the inner surface of the dome, rather than dispersing as under a flat top. This facilitates bubble concentration and breakage, and allows for efficient extraction through the vacuum port 14, improving degassing efficiency. Simultaneously, the dome structure is mechanically better able to withstand internal positive and negative pressures, exhibiting higher structural strength and stability at the same wall thickness compared to a flat top, thus enhancing equipment safety.

[0043] Servo motor 3 is installed on the top of mixing tank 1. The rotating shaft of stirring deaerator 2 passes through the top of mixing tank 1 and is fixedly connected to the output end of servo motor 3. The rotating shaft of stirring deaerator 2 is rotatably connected to the top of mixing tank 1 through sealed bearing, so that stirring deaerator 2 can be driven to work after servo motor 3 is started.

[0044] The control logic of the controller of this invention is as follows: Figure 4 As shown, the implementation of the control method of the present invention specifically includes the following steps:

[0045] S1: Pre-mixing stage: The feed pipe 4 is detached from the connecting pipe 18 and the output end of the connecting pipe 18 is sealed with a cap that is threaded to the connecting pipe 18. After the operator completes the feeding and seals the mixing tank 1, the equipment is started through the human-machine interface or a preset program. The controller starts the servo motor 3, driving the agitator and deaerator 2 to rotate at a speed of 100-300 rpm for 1-3 minutes of pre-mixing to make the adhesive materials initially mixed evenly.

[0046] S2: Vacuum degassing and stirring stage (closed-loop pressure control). After pre-stirring, the system automatically enters this stage via the controller, which simultaneously performs the following operations:

[0047] Turn on the external vacuum equipment.

[0048] Servo motor 3 runs continuously, driving the stirring and deaerator 2 to work.

[0049] Entering the pressure closed-loop control loop:

[0050] a. The controller reads the pressure value P in the mixing tank 1 in real time through pressure gauge 17.

[0051] b. Compare P with the lower limit of the set range (-0.08MPa): If P < -0.08MPa, it indicates that the vacuum is too high. The controller will shut down the external vacuum equipment to prevent over-vacuuming.

[0052] c. Compare P with the upper limit of the set range (-0.05MPa): If P > -0.05MPa, it indicates that the vacuum level is insufficient, and the controller will start or maintain the external vacuum equipment.

[0053] d. If P is within the set range (-0.08MPa≤P≤-0.05MPa), then maintain the current state of all devices.

[0054] e. The system has a short waiting delay Δt after each judgment to prevent the device from starting and stopping frequently.

[0055] This pressure control loop operates continuously, while the internal timer of the system begins to accumulate degassing time. When the total degassing time reaches the preset 5-15 minutes, the controller shuts off the external vacuum equipment and servo motor 3, the degassing stage ends, and the feed tube 4 is installed on the connecting tube 18 via nut 41 to facilitate subsequent delivery of adhesive.

[0056] S3: Pressurized glue delivery stage.

[0057] The controller opens the solenoid valve of the pressurization unit (i.e., nitrogen cylinder 16) to fill the mixing tank 1 with clean nitrogen.

[0058] The controller continuously monitors the pressure value P until P > 0.1 MPa (an exemplary starting pressure) to ensure sufficient positive pressure inside the tank. Once the required positive pressure is reached, the controller opens the valve on the feed pipe 4.

[0059] S4: Glue delivery and termination.

[0060] Under positive pressure, the glue is conveyed to the glue tank of the glue stretching machine through the feed pipe 4 and the precision filter 15.

[0061] The controller determines whether the glue has been emptied by using the level sensor signal in the glue tank or by observing the weight / pressure changes in the mixing tank 1. Once the delivery is confirmed to be complete, the controller sequentially closes the valve on the feed pipe 4 and the solenoid valve on the pressurization unit.

[0062] The entire gluing process is complete, the system is reset, and preparations are made for the next batch of operations.

[0063] Temperature control process: Throughout the entire S1 to S4 stages, the controller performs temperature control in parallel: the temperature inside the insulation sleeve 13 is monitored in real time by the temperature sensor, compared with the set value, and the heating element 131 is controlled to be turned on and off by the PID algorithm, so that the glue temperature is maintained within the set optimal range.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A gluing device for a COB LED strip production gluing machine, comprising a frame (100) and a mixing tank (1) mounted on the frame (100), the top of the mixing tank (1) including a feeding port (11), the feeding port (11) being fitted with a sealing plug (12) for sealing the feeding port (11), characterized in that, The gluing device also includes a degassing stirring mechanism for stirring the glue material, a pressurizing unit for pressurizing the mixing tank (1) to facilitate the glue in the mixing tank to enter the glue tank of the glue-pulling machine, and a controller connected to the servo motor (3) and the pressurizing unit. The mixing tank (1) is provided with a heat insulation sleeve (13). The degassing and stirring mechanism includes a stirring degasser (2) rotatably connected in the mixing tank (1) and a servo motor (3) for driving the stirring degasser (2) to rotate. The stirring degasser (2) includes at least one layer of blades (21) located below the liquid surface of the glue material. The rotation axis of the blades (21) forms an angle of 10° to 45° with the horizontal plane to form an axial circulation flow from top to bottom during stirring. The top of the mixing tank (1) also includes a vacuum port (14) and a pressurization port (15). The vacuum port (14) is connected to an external vacuum device through a pipe to create a negative pressure environment of -0.05MPa to -0.08MPa inside the mixing tank (1). The pressurization port (15) is connected to a pressurization unit through a pipe. The top of the mixing tank (1) is also equipped with a pressure gauge (17) for monitoring the pressure inside the mixing tank (1). The pressure gauge (17) is electrically connected to the external vacuum device through a controller. The bottom of the mixing box (1) is connected to a guide pipe (4) with a valve. The output end of the guide pipe (4) is connected to the glue tank on the glue pulling machine. The input end of the guide pipe (4) is disconnected from the bottom of the mixing box (1).

2. The gluing device for a COB LED strip production gluing machine according to claim 1, characterized in that, The bottom of the mixing box (1) is connected to a connecting pipe (18). The input end of the guide pipe (4) is rotatably connected to a nut (41) via a bearing. The nut (41) is threadedly connected to the connecting pipe (18). The bottom of the mixing box (1) is inclined toward the connecting pipe (18). A precision filter (15) is provided at the input end of the guide pipe (4). The filtration accuracy of the precision filter (15) is 100 to 400 mesh.

3. The gluing device for a COB LED strip production gluing machine according to claim 1, characterized in that, The inner top surface of the mixing box (1) is a dome structure that protrudes downwards.

4. The gluing device for a COB LED strip production gluing machine according to claim 1, characterized in that, The pressurization unit is a nitrogen cylinder (16) with a regulating valve.

5. The gluing device for a COB LED strip production gluing machine according to claim 1, characterized in that, The insulation jacket (13) is equipped with a heating element (131) and a temperature sensor controlled by a controller.

6. The gluing device for a COB LED strip production gluing machine according to claim 1, characterized in that, The servo motor (3) is installed on the top of the mixing tank (1). The rotating shaft of the stirring deaerator (2) passes through the top of the mixing tank (1) and is fixedly connected to the output end of the servo motor (3). The rotating shaft of the stirring deaerator (2) is rotatably connected to the top of the mixing tank (1) through a sealed bearing.

7. The gluing device for a COB LED strip production gluing machine according to claim 1, characterized in that, The frame (100) is equipped with casters (1001) for easy movement.

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