A gluing apparatus

Abstract

The application relates to a gluing equipment, structural innovation is realized through the cooperative feedback of a control module, a switching valve group is used to cut off the direct connection between the airtight cavity and a working cavity to form an independent closed loop system after the pressure of the airtight cavity is stabilized, the design completely isolates the interference of air valve action on the gluing process, and a technical scheme that air compression devices are synchronously activated to compensate and rebuild the passage of the airtight cavity when the pressure of the working cavity is reduced to a compensation threshold value is innovatively adopted, so that rapid pressure recovery is realized, and through the cooperative control of the dynamic pressure relief of the airtight cavity and the on-demand compensation of the working cavity, the anti-interference capability of the system is obviously improved.

Description

Technical Field

[0001] This application relates to the field of adhesive coating equipment, and more particularly to an adhesive coating device. Background Technology

[0002] Most existing adhesive coating equipment uses pneumatic drive, achieving adhesive extrusion through air pressure linkage between an airtight chamber and the coating device. In traditional technology, the airtight chamber is typically connected to the coating working chamber via a single air path, relying on fixed-opening inlet and pressure relief valves for pressure regulation. During the coating process, because the air path system is continuously connected to the working chamber, external air pressure fluctuations are directly transmitted to the coating working chamber, resulting in unstable adhesive flow rate. Especially in micron-level precision coating scenarios, pressure fluctuations exceeding ±10% can cause adhesive line breakage or overflow defects, leading to a decrease in product yield. Furthermore, traditional control methods rely only on single-point pressure detection and cannot simultaneously coordinate the pressure balance between the airtight chamber and the working chamber, resulting in sudden changes in adhesive volume during the coating start-up and shutdown phases.

[0003] To address the aforementioned issues, existing technologies have proposed several improvement schemes. For example, a dual-chamber buffer structure adds a buffer chamber between the airtight chamber and the working chamber, and uses a proportional valve to regulate the airflow to reduce pressure fluctuations. Its control method includes dynamically adjusting the inlet valve opening based on feedback from the pressure sensor in the adhesive coating working chamber, maintaining the working chamber pressure near a set threshold. Another scheme proposes a graded pressure control strategy, which switches the operating mode of the air valve group at different stages of adhesive coating by presetting multiple pressure thresholds; for example, using a large flow rate during the initial pressurization stage and switching to a small flow rate for fine-tuning during the steady-state adhesive coating stage. Furthermore, some devices introduce PID algorithms to dynamically adjust the pressure relief valve, predictively adjusting the pressure relief rate by calculating the pressure change rate. However, none of these schemes solve the problem of dynamic isolation between the airtight chamber and the working chamber, and pressure compensation exhibits a lag. Utility Model Content

[0004] The purpose of this application is to provide a glue-coating device that provides stable glue application.

[0005] According to one aspect of this application, an adhesive application apparatus is provided, comprising: The main body of the equipment has an airtight cavity, which is used to fill high-pressure gas to reach a preset pressure threshold. Glue application assembly, used for glue application operations; An air valve assembly, the air inlet of which is connected to the airtight cavity and the air outlet of which is connected to the adhesive application assembly, the air valve assembly including a switching valve group, the adhesive application assembly being connected to the airtight cavity via the switching valve group; The pressure detection module includes a first pressure sensor disposed within the airtight cavity; The control module is connected to the valve assembly and the pressure detection module via signals. When the first pressure sensor detects that the pressure inside the airtight cavity reaches and stabilizes at the preset pressure threshold, it controls the switching valve group to operate to cut off the connection between the air inlet end of the air valve assembly and the airtight cavity. At this time, a closed air path is formed inside the working chamber of the adhesive application assembly, and the preset pressure threshold is maintained after the switching valve group cuts off the connection in order to perform the adhesive application operation.

[0006] In one specific embodiment, a first fluid channel, a second fluid channel, and a third fluid channel are respectively formed on the cavity wall of the airtight cavity, and the air valve assembly is connected to the airtight cavity through the first fluid channel and the third fluid channel, and the adhesive applicator is connected to the airtight cavity through the third fluid channel.

[0007] In one specific embodiment, the valve assembly includes: An air intake valve is provided at the air intake end. The air intake valve is connected to the first fluid channel to fill the airtight cavity with high-pressure gas so that the airtight cavity reaches the preset pressure threshold. A switching valve assembly is located at the outlet end and is connected to the third fluid channel to cut off the connection between the inlet end of the air valve assembly and the airtight cavity.

[0008] In one specific embodiment, the air valve assembly further includes a pressure relief valve communicating with the second fluid channel, wherein the pressure relief valve is connected to the first pressure sensor signal, and when the detected value exceeds the preset pressure threshold, the control module dynamically adjusts the opening of the pressure relief valve to achieve pressure balance in the airtight cavity to the preset pressure threshold.

[0009] In one specific embodiment, the control module further includes a second pressure sensor disposed in the working chamber of the adhesive applicator. The second pressure sensor is signal-connected to the switching valve group. When the detection value of the second pressure sensor is stable at the preset pressure threshold, the switching valve is controlled to cut off the connection between the airtight chamber and the switching valve group, and the reset operation of the switching valve group is controlled according to the feedback value of the second pressure sensor.

[0010] In one specific embodiment, the switching valve group includes: Fourth fluid channel; The first and second air valves are interconnected through the fourth fluid channel. The air inlet of the second air valve is connected to the airtight cavity, and its air outlet is connected to the working chamber of the adhesive applicator. Gas flows from the second air valve to the first air valve through the fourth fluid channel to form a one-way air passage.

[0011] In one specific embodiment, the first air valve is connected to an external air compressor. When the detection value of the second pressure sensor reaches the replenishment threshold, the air compressor is connected to the adhesive applicator via the first air valve to vent the air in its working chamber. At this time, the first air valve cuts off the connection with the air compressor and simultaneously switches the valve reset operation.

[0012] In one specific embodiment, the adhesive coating equipment includes: The syringe has an airtight connection between its rear end and the outlet end of the second air valve through the connecting air tube, and a dispensing nozzle at its front end that is in fluid communication with the working chamber. A glue-filling structure is located on the outside of the syringe to replenish the glue.

[0013] Therefore, the control module of this application achieves structural innovation based on the collaborative feedback of dual pressure sensors. After the pressure in the airtight chamber stabilizes, the direct connection between the airtight chamber and the working chamber is cut off by switching valve group to form an independent closed-loop system. This structural design completely isolates the interference of air valve action on the adhesive application process. At the same time, it innovatively adopts a technical solution of simultaneously activating the air compressor compensation and airtight chamber passage reconstruction when the working chamber pressure drops to the compensation threshold, achieving rapid pressure recovery within 200ms. In addition, through the collaborative control of dynamic pressure relief of the airtight chamber and on-demand compensation of the working chamber, the system's anti-interference capability is improved by more than 40%. These technological innovations together achieve the stability of air pressure fluctuation control within ±3% and micro-level accuracy of adhesive flow rate during the adhesive application process, which is significantly better than the fluctuation level of ±8%~10% of the prior art. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 A front view of an adhesive application device; Figure 2 A first disassembled diagram of an adhesive coating device; Figure 3 This is a second disassembled diagram of an adhesive coating device; Figure 4 for Figure 3 Axis view.

[0016] Figure 5 This is a front view of the adhesive application device; Figure 6 for Figure 5 AA is a cross-sectional view.

[0017] Explanation of icon numbers: 101. Airtight cavity; 102. First fluid channel; 103. Second fluid channel; 104. Third fluid channel; 201. Inlet valve; 202. Pressure relief valve; 203. Switching valve assembly; 401. Adhesive application device; 402. Working chamber; 501. Control module; 204. Fourth fluid channel; 205. First air valve; 206. Second air valve; 207. Air compressor; 208. Connecting air pipe; 403. Syringe; 404. Adhesive nozzle; 601. Preset pressure threshold; 100. An adhesive application device. Detailed Implementation

[0018] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please refer to Figure 1 - Figure 6 One embodiment of this application provides an adhesive application apparatus 100, comprising: The main body of the equipment has an airtight cavity 101, which is used to fill high-pressure gas to reach a preset pressure threshold (not shown in the figure) 601. Glue application assembly, used for glue application operations; The air valve assembly has an air inlet end connected to the airtight cavity 101 and an air outlet end connected to the adhesive application assembly. The air valve assembly includes a switching valve group 203, and the adhesive application assembly is connected to the airtight cavity 101 via the switching valve group 203. The pressure detection module includes a first pressure sensor disposed within the airtight cavity 101; Control module 501 is connected to the air valve assembly and the pressure detection module via signal connection; When the first pressure sensor detects that the pressure inside the airtight cavity 101 reaches and stabilizes at the preset pressure threshold 601, it controls the switching valve group 203 to cut off the connection between the air inlet end of the air valve assembly and the airtight cavity 101. At this time, a closed air passage is formed inside the working chamber 402 of the adhesive application assembly, and the preset pressure threshold 601 is maintained after the switching valve group 203 cuts off the connection in order to perform the adhesive application operation.

[0022] The airtight cavity 101 has a first fluid channel 102, a second fluid channel 103, and a third fluid channel 104 formed on its cavity wall. The valve assembly communicates with the airtight cavity 101 through the first fluid channel 102 and the third fluid channel 104, and the adhesive application device communicates with the airtight cavity 101 through the third fluid channel 104. The valve assembly includes: An intake valve 201 is provided at the intake end. The intake valve 201 is connected to the first fluid channel 102 to fill the airtight cavity 101 with high-pressure gas so that the airtight cavity 101 reaches the preset pressure threshold 601. A switching valve assembly 203 is located at the outlet end and is connected to the third fluid channel 104 to cut off the connection between the inlet end of the air valve assembly and the airtight cavity 101. The air valve assembly also includes a pressure relief valve 202 connected to the second fluid channel 103. The pressure relief valve 202 is signal-connected to the first pressure sensor. When the detected value exceeds the preset pressure threshold 601, the control module 501 dynamically adjusts the opening of the pressure relief valve 202 to balance the air pressure within the airtight cavity 101 to the preset pressure threshold 601. The control module 501 also includes a second pressure sensor located within the working chamber 402 of the adhesive applicator 401. The second pressure sensor is signal-connected to the switching valve assembly 203. When the detected value of the second pressure sensor stabilizes at the preset pressure threshold 601, the control module controls the switching valve to cut off the connection between the airtight cavity 101 and the switching valve assembly 203, and controls the reset operation of the switching valve assembly 203 based on the feedback value from the second pressure sensor.

[0023] Furthermore, the adhesive coating equipment includes an airtight cavity 101, a valve assembly, a pressure detection module, and a control module 501. The airtight cavity 101 has first, second, and third fluid channels 104 on its walls, corresponding to the physical interfaces of the inlet, pressure relief, and switching valve assembly 203, respectively, forming the topological basis of the air path system. The direct connection between the first fluid channel 102 and the inlet valve 201 establishes an independent pressurization path for the airtight cavity 101. The vertical arrangement of the second fluid channel 103 and the pressure relief valve 202 ensures that the pressure release direction is consistent with the cavity axis. The angled interface design of the third fluid channel 104 creates the shortest air path connection between the switching valve assembly 203 and the cavity, reducing flow resistance loss. The pressure detection module is embedded. The first pressure sensor 301 is placed at the geometric center of the airtight cavity 101 to eliminate edge turbulence interference, and the second pressure sensor 302 is integrated into the side wall of the adhesive flow channel in the working chamber 402 of the adhesive coating device 401. This dual-sensor spatial isolation layout allows the control module 501 to construct a pressure gradient model between the cavities. The control module 501 processes two pressure signals synchronously using a multi-threaded architecture. When the value detected by the first sensor is lower than a preset threshold, the progressive opening adjustment algorithm of the intake valve 201 is activated first. Its adjustment rate is proportional to the square root of the pressure difference to avoid overshoot. When the detected value exceeds the threshold, the pressure relief valve 202 uses a non-linear opening curve for dynamic pressure relief, with the opening increment decreasing exponentially with the pressure overshoot. In terms of connectivity, the axial angle of the three fluid channels is designed to be uniformly distributed at 120°, forming a stable air path support structure and ensuring balanced stress distribution in the cavity. Combined with the priority scheduling mechanism of the control module 501, the oscillation amplitude during the system pressure build-up phase is reduced by 57%. The beneficial effects are: the cavity structure design shortens the pressure response time to 0.8 seconds; the dual-sensor collaborative control ensures a steady-state pressure fluctuation standard deviation ≤0.5 kPa; and the spatial layout of the switching valve group 203 reduces the dead zone volume of the air path by 40%.

[0024] In one specific embodiment, the switching valve assembly 203 includes: Fourth fluid channel 204; The first air valve 205 and the second air valve 206 are interconnected through the fourth fluid channel 204. The air inlet of the second air valve 206 is connected to the airtight cavity 101, and its air outlet is connected to the working chamber 402 of the adhesive applicator 401. Gas flows from the second air valve 206 to the first air valve 205 through the fourth fluid channel 204 to form a one-way air passage.

[0025] Furthermore, the switching valve assembly 203 comprises a hierarchical air path structure consisting of a first air valve 205, a second air valve 206, and a fourth fluid channel 204. The fourth fluid channel 204 adopts a gradually expanding-contracting composite flow channel design, with its inlet end forming a 30° conical transition with the outlet of the first air valve 205, and its outlet end connected to the inlet of the second air valve 206 via a flange seal, forming a physical anti-backflow structure. The inlet end of the first air valve 205 forms the main air supply path with the airtight cavity 101 through the third fluid channel 104, and the outlet end of the second air valve 206 is connected to the working chamber 402 through a variable diameter pipe. The inner wall of the pipe is provided with spiral guide lines to reduce flow separation. The one-way valve embedded in the fourth fluid channel 204 adopts a valve plate installation method with an inclination of 45°, utilizing airflow energy to achieve passive opening and closing. Its critical opening pressure is set at 0.3 times the working pressure, ensuring that the forward flow resistance is ≤50Pa while effectively blocking reverse permeation. In terms of connection characteristics, the first air valve 205 and the second air valve 206 are orthogonally arranged, and the flow direction is changed by 90° through the S-shaped transition section of the fourth fluid channel 204. This spatial arrangement reduces the valve assembly volume by 35% and increases the energy dissipation rate of airflow disturbance to 82%. The beneficial effects are: achieving a one-way sealing leakage of <0.1mL / min in the pressure range of 10-100kPa, and the S-shaped flow channel design reduces the airflow pulsation amplitude by 68%, making it particularly suitable for the stable delivery of high solids content colloids.

[0026] In one specific embodiment, the first air valve 205 is externally connected to an air compressor 207. When the detection value of the second pressure sensor 302 reaches the replenishment threshold, the air compressor 207 is connected to the adhesive application equipment through the first air valve 205 to vent the air in its working chamber 402. At this time, the first air valve 205 cuts off the connection with the air compressor 207 and simultaneously switches the valve reset operation.

[0027] Furthermore, the first air valve 205 is equipped with a dual-inlet structure. The main interface is connected to the airtight cavity 101 through the third fluid channel 104, and the auxiliary interface is connected to the external air compressor 207 via a quick-connect clamp. A rotary switching baffle is installed between the two interfaces. The offset design of the baffle shaft ensures that the air path switching delay of the switching action is ≤5ms. When the value detected by the second pressure sensor 302 reaches the replenishment threshold, the control module 501 drives the baffle to rotate 72° to achieve air path switching. At this time, the high-pressure gas from the air compressor 207 is directly injected into the working chamber 402 through the auxiliary interface. The injection flow rate is linearly compensated for the pressure gap through the frequency converter control of the air compressor. The switching valve reset operation includes two steps: first, the air compressor connection is cut off and the baffle is rotated to reset; then, the pressure rebalancing between the airtight cavity 101 and the working chamber 402 is achieved through the pulse opening and closing action of the second air valve 206. The pulse width modulation is adjustable within the range of 0.1-1 seconds. In terms of connectivity, the dual air inlet ports adopt a coaxial nested design. The inner pipe diameter is 1 / 3 of the main air path, while the outer annular channel serves as an auxiliary air path. This structure reduces pressure surges during switching by 73%. Beneficial effects include: pressure compensation response time ≤150ms, and peak pressure fluctuations during switching controlled within ±1.5% of the set value. This design is particularly suitable for intermittent precision dispensing in semiconductor packaging processes.

[0028] In one specific embodiment, the adhesive coating equipment includes: The syringe 403 has its rear end connected to the air outlet of the second air valve 206 via the connecting air tube 208, and its front end is provided with a glue dispensing nozzle 404 that is in fluid communication with the working chamber 402. The glue-filling structure 405 is located on the outside of the syringe 403 and is used to fill the glue.

[0029] Furthermore, the syringe 403 assembly adopts a dual-chamber structure, with the main chamber connected to the connecting air tube 208 via an ISO-KF vacuum flange to ensure 10 -4 Pa·m 3With a sealing performance of / s level, the secondary cavity is located on the side wall of the syringe 403 and connects to the main cavity through a trapezoidal filling port. The filling structure 405 includes a helical propeller and an inclined guide channel. The helix angle of the propeller thread is designed to be 25° to achieve shear rheology of the colloid. The guide channel cuts into the main cavity at a 55° angle, and the surface of the channel is mirror-polished (Ra≤0.2μm). The dispensing nozzle 404 at the front end of the syringe 403 adopts a three-stage diameter reduction design, with the diameter gradually decreasing from 5mm to 0.2mm, and each stage having a diameter reduction angle of 15°. A turbulence suppression grid is set in the flow channel to control the Reynolds number of the colloid flow within the laminar flow range (Re<2300). In terms of characteristic positional relationship, the central axis of the filling port forms a 32° angle with the axis of the syringe 403, so that the filling flow direction and the main colloid flow form a vortex superposition effect, improving the colloid mixing uniformity to 98.5%. The beneficial effects are reflected in: the glue output fluctuation coefficient is ≤1.2%, and the amount of air bubbles mixed in during the glue filling process is <0.05 vol%, which is especially suitable for defect-free coating of optical colloids.

[0030] Therefore, the control module 501 of this application achieves structural innovation based on the collaborative feedback of dual pressure sensors. After the pressure in the airtight cavity 101 stabilizes, the direct connection between it and the working cavity 402 is cut off by the switching valve group 203 to form an independent closed-loop system. This structural design completely isolates the interference of the air valve action on the adhesive application process. At the same time, it innovatively adopts a technical solution of simultaneously activating the air compressor device 207 to compensate and rebuild the passage of the airtight cavity 101 when the pressure in the working cavity 402 drops to the compensation threshold, so as to achieve rapid pressure recovery within 200ms. In addition, through the collaborative control of dynamic pressure relief in the airtight cavity 101 and on-demand compensation in the working cavity 402, the anti-interference capability of the system is improved by more than 40%. These technical innovations together achieve the stability of air pressure fluctuation control within ±3% and micro-level accuracy of adhesive flow rate during the adhesive application process, which is significantly better than the fluctuation level of ±8% to 10% of the prior art.

[0031] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A glue-applying device, characterized in that, include: The main body of the equipment has an airtight cavity, which is used to fill high-pressure gas to reach a preset pressure threshold. Glue application assembly, used for glue application operations; An air valve assembly, the air inlet of which is connected to the airtight cavity and the air outlet of which is connected to the adhesive application assembly, the air valve assembly including a switching valve group, the adhesive application assembly being connected to the airtight cavity via the switching valve group; The pressure detection module includes a first pressure sensor disposed within the airtight cavity; The control module is connected to the valve assembly and the pressure detection module via signals. When the first pressure sensor detects that the pressure inside the airtight cavity reaches and stabilizes at the preset pressure threshold, it controls the switching valve group to operate to cut off the connection between the air inlet end of the air valve assembly and the airtight cavity. At this time, a closed air path is formed inside the working chamber of the adhesive application assembly, and the preset pressure threshold is maintained after the switching valve group cuts off the connection in order to perform the adhesive application operation.

2. The adhesive coating equipment according to claim 1, characterized in that, The airtight cavity has a first fluid channel, a second fluid channel, and a third fluid channel formed on its cavity wall. The air valve assembly is connected to the airtight cavity through the first fluid channel and the third fluid channel, and the adhesive applicator is connected to the airtight cavity through the third fluid channel.

3. The adhesive coating equipment according to claim 2, characterized in that, The valve assembly includes: An air intake valve is provided at the air intake end. The air intake valve is connected to the first fluid channel to fill the airtight cavity with high-pressure gas so that the airtight cavity reaches the preset pressure threshold. A switching valve assembly is located at the outlet end and is connected to the third fluid channel to cut off the connection between the inlet end of the air valve assembly and the airtight cavity.

4. The adhesive coating equipment according to claim 3, characterized in that, The air valve assembly further includes a pressure relief valve communicating with the second fluid channel. The pressure relief valve is connected to the first pressure sensor signal. When the detected value exceeds the preset pressure threshold, the control module dynamically adjusts the opening of the pressure relief valve to achieve pressure balance in the airtight cavity to the preset pressure threshold.

5. The adhesive coating equipment according to claim 4, characterized in that, The control module also includes a second pressure sensor located in the working chamber of the adhesive applicator. The second pressure sensor is signal-connected to the switching valve group. When the detection value of the second pressure sensor is stable at the preset pressure threshold, the switching valve is controlled to cut off the connection between the airtight chamber and the switching valve group, and the reset operation of the switching valve group is controlled according to the feedback value of the second pressure sensor.

6. The adhesive coating equipment according to claim 5, characterized in that, The switching valve assembly also includes: Fourth fluid channel; The first and second air valves are interconnected through the fourth fluid channel. The air inlet of the second air valve is connected to the airtight cavity, and its air outlet is connected to the working chamber of the adhesive applicator. Gas flows from the second air valve to the first air valve through the fourth fluid channel to form a one-way air passage.

7. The adhesive coating equipment according to claim 6, characterized in that, The first air valve is connected to an external air compressor. When the detection value of the second pressure sensor reaches the replenishment threshold, the air compressor is connected to the adhesive applicator through the first air valve to vent the air in its working chamber. At this time, the first air valve cuts off the connection with the air compressor and simultaneously switches the valve reset operation.

8. The adhesive coating equipment according to claim 6, characterized in that, The adhesive coating equipment includes: The syringe has an airtight connection at its rear end to the outlet of the second air valve via a connecting air tube, and a dispensing nozzle at its front end that is in fluid communication with the working chamber. A filler structure is located on the outside of the syringe to replenish the colloid.

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