Glue solution circulating system and gluing equipment

Abstract

The utility model discloses a glue solution circulating system and gluing equipment, the gluing equipment comprises a gluing mechanism with a gluing cavity and a glue solution collecting box capable of receiving glue solution dripping from the gluing mechanism, the glue solution circulating system comprises a glue storage container with a glue storage cavity and a recovery container with a recovery cavity, wherein a gluing cavity of the gluing mechanism is communicated with a glue storage cavity of a glue storage container, and a collecting box is communicated with a recycling cavity of a recycling container, so that online recycling and reutilization of a glue solution can be realized, and the glue solution is prevented from dropping onto a machine table of gluing equipment in the gluing process of the gluing mechanism, polluting the machine table and wasting the glue solution; the recovered glue solution is reused, so that the utilization rate of the glue solution is improved, and the production and gluing cost is reduced; and the recovery and reutilization of the glue solution are finished on line in real time, and off-line operation is not needed, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a glue liquid circulation system and a glue coating device. Background Art

[0002] In the production process of some products, there is a process of coating glue on the products. For example, in the process of preparing grid lines on a battery wafer by electroplating method, it is necessary to pre-coat glue on the side of the battery wafer to form a protective layer to protect the side of the battery wafer from being electroplated. In the field of copper manufacturing equipment for photovoltaic heterojunction battery wafers, it is necessary to evenly coat glue on the edge of the battery wafer. During the glue coating process, a lot of waste will be caused. To save costs, the glue in this part needs to be recycled and reused after ensuring that the viscosity and performance meet the usage requirements. However, the glue liquid has a certain viscosity and is extremely easy to solidify, resulting in the blockage and failure of the entire pipeline system. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a new glue liquid circulation system.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a glue liquid circulation system for a glue coating device, the glue coating device includes a glue coating mechanism for coating glue liquid on a product to be processed, and a collection box capable of receiving the glue liquid dripping from the glue coating mechanism. The glue coating mechanism has a glue coating cavity. The glue liquid circulation system includes:

[0005] A glue storage container having a glue storage cavity;

[0006] A recycling container having a recycling cavity;

[0007] A glue inlet pipeline connecting the glue storage cavity and the glue coating cavity;

[0008] A recycling pipeline connecting the collection box and the recycling cavity;

[0009] A glue replenishing pipeline connecting the recycling cavity and the glue storage cavity.

[0010] In some embodiments, the glue liquid circulation system further includes a first power mechanism, which is connected to the glue storage cavity and is used to inject a gas medium into the glue storage cavity, so that the glue liquid in the glue storage cavity flows into the glue coating cavity under the pressure of the gas medium;

[0011] The glue liquid circulation system further includes a second power mechanism, which is connected to the recycling cavity and is used to inject a gas medium into the recycling cavity, so that the glue liquid in the recycling cavity flows into the glue storage cavity under the pressure of the gas medium.

[0012] In some embodiments, the first power mechanism includes a third air supply pipeline that communicates with the glue storage cavity and is used to inject a gas medium into the glue storage cavity, a third control valve provided on the third air supply pipeline and used to control the opening and closing of the third air supply pipeline, and a gas source;

[0013] And / or, the second power mechanism includes a fourth air supply pipeline that communicates with the recovery cavity and is used to inject a gas medium into the recovery cavity, a fourth control valve provided on the fourth air supply pipeline and used to control the opening and closing of the fourth air supply pipeline, and a gas source.

[0014] In some embodiments, both the third control valve and the fourth control valve are solenoid valves. The solenoid valve has an air inlet and an air outlet, and the solenoid valve also has a switchable first working position and a second working position. When the solenoid valve is in the first working position, the air inlet communicates with the air outlet; when the solenoid valve is in the second working position, the air inlet and the air outlet are not connected to each other;

[0015] And / or, a first pressure regulating valve for adjusting the air supply pressure is provided on the third air supply pipeline;

[0016] And / or, a second pressure regulating valve for adjusting the air supply pressure is provided on the fourth air supply pipeline.

[0017] In some embodiments, the glue liquid circulation system further includes a third power mechanism, and the third power mechanism is a vacuum pumping mechanism configured to evacuate the recovery cavity to suck the glue liquid in the collection box into the recovery cavity under negative pressure;

[0018] Or, the third power mechanism is a liquid pump, and the liquid pump is arranged on the recovery pipeline to pump the glue liquid in the collection box into the recovery cavity through the recovery pipeline.

[0019] In some embodiments, one of the glue storage container and the recovery container serves as a glue supply component for supplying glue liquid to the glue application mechanism, and the other serves as a recovery component for recovering the glue liquid from the collection box, where:

[0020] Both the glue storage container and the recovery container are connected to the glue application mechanism through the glue inlet pipeline, so that both the glue storage cavity and the recovery cavity communicate with the glue application cavity; both the glue storage container and the recovery container are connected to the collection box through the recovery pipeline, so that both the glue storage cavity and the recovery cavity communicate with the collection box; the glue storage container and the recovery container are connected to each other through the glue replenishment pipeline, so that the glue storage cavity and the recovery cavity communicate with each other through the glue replenishment pipeline,

[0021] When a passage is formed between the glue storage cavity and the glue coating cavity, a break is formed between the recovery cavity and the glue coating cavity, and a passage is formed between the recovery cavity and the collection box. The glue storage container serves as the glue supply component and the recovery container serves as the recovery component.

[0022] When a break is formed between the glue storage cavity and the glue coating cavity, a passage is formed between the recovery cavity and the glue coating cavity, and a break is formed between the recovery cavity and the collection box. A passage is formed between the glue storage cavity and the collection box. The glue storage container serves as the recovery component and the recovery container serves as the glue supply component.

[0023] In some embodiments, the glue liquid circulation system further includes:

[0024] A first valve, which is arranged on the glue replenishing pipeline. When the first valve is in the open state, the recovery cavity and the glue storage cavity are interconnected; when the first valve is in the closed state, the recovery cavity and the glue storage cavity are not interconnected.

[0025] A second valve, which is arranged on the recovery pipeline. When the second valve is in the open state, the recovery cavity and the collection box are interconnected; when the second valve is in the closed state, the recovery cavity and the collection box are not interconnected.

[0026] The glue liquid circulation system has a first working state and a second working state. When the glue liquid circulation system is in the first working state, the first valve is in the closed state and the second valve is in the open state. A first medium passage for coating and recovering the glue liquid is formed among the glue storage cavity, the glue inlet pipeline, the glue coating cavity, the collection box, the recovery pipeline and the recovery cavity. When the glue liquid circulation system is in the second working state, the first valve is in the open state and the second valve is in the closed state. A second medium passage for replenishing the glue liquid to the glue storage cavity is formed between the recovery cavity, the glue replenishing pipeline and the glue storage cavity. Or,

[0027] The glue liquid circulation system has a third working state and a fourth working state. When the glue liquid circulation system is in the third working state, both the first valve and the second valve are in the open state. A first medium passage for coating and recovering the glue liquid is formed among the glue storage cavity, the glue inlet pipeline, the glue coating cavity, the collection box, the recovery pipeline and the recovery cavity. A second medium passage for replenishing the glue liquid to the glue storage cavity is formed between the recovery cavity, the glue replenishing pipeline and the glue storage cavity. When the glue liquid circulation system is in the fourth working state, both the first valve and the second valve are in the closed state, and both the first medium passage and the second medium passage are blocked.

[0028] In some embodiments, the first valve is a first pneumatic control valve, and the adhesive liquid circulation system further includes a first air supply pipeline and a first control valve. The first air supply pipeline is connected to the first pneumatic control valve and is used to introduce a gas medium into the first pneumatic control valve. The first control valve is arranged on the first air supply pipeline and is used to control the opening and closing of the first air supply pipeline; and / or,

[0029] The second valve is a second pneumatic control valve, and the adhesive liquid circulation system further includes a second air supply pipeline and a second control valve. The second air supply pipeline is connected to the second pneumatic control valve and is used to introduce a gas medium into the second pneumatic control valve. The second control valve is arranged on the second air supply pipeline and is used to control the opening and closing of the second air supply pipeline.

[0030] In some embodiments, the adhesive liquid circulation system further includes one of the following structures or a combination of two or more of them:

[0031] (1) A first liquid level sensor for detecting the liquid level in the glue storage cavity, and the first liquid level sensor is communicatively connected between the first valve and the second valve;

[0032] (2) The adhesive liquid circulation system further includes a feeding device for replenishing adhesive liquid or diluent into the recovery cavity and an adhesive liquid state detection element. The adhesive liquid state detection element is communicatively connected to the feeding device. The adhesive liquid state detection element at least includes one of a second liquid level sensor for detecting the liquid level in the recovery cavity, a viscosity sensor for detecting the viscosity of the adhesive liquid in the recovery cavity, and a weight sensor for detecting the weight of the liquid in the recovery cavity;

[0033] (3) A stirring device for stirring the medium in the recovery cavity;

[0034] (4) A first liquid pump arranged on the glue replenishing pipeline, and the first liquid pump is configured to pump the adhesive liquid in the recovery container into the glue storage container. The first valve is independently arranged or integrated in the first liquid pump;

[0035] (5) A second liquid pump arranged on the recovery pipeline, and the second liquid pump is configured to pump the adhesive liquid in the collection box into the recovery container. The second valve is independently arranged or integrated in the second liquid pump;

[0036] (6) A third liquid pump arranged on the glue feeding pipeline, and the third liquid pump is configured to pump the adhesive liquid in the glue storage container into the glue coating mechanism.

[0037] In some embodiments, the glue feeding pipeline includes a first glue feeding branch pipe, a second glue feeding branch pipe, and a glue feeding main pipe. The first glue feeding branch pipe, the second glue feeding branch pipe, and the glue feeding main pipe are connected and communicated through a first three-way valve. When the first three-way valve is in the first working position, the first glue feeding branch pipe and the glue feeding main pipe are communicated, so that a path is formed between the glue storage cavity and the glue coating cavity, and a break is formed between the recovery cavity and the glue coating cavity. When the first three-way valve is in the second working position, the second glue feeding branch pipe and the glue feeding main pipe are communicated, so that a break is formed between the glue storage cavity and the glue coating cavity, and a path is formed between the recovery cavity and the glue coating cavity. When the first three-way valve is in the third working position, a break is formed between the glue storage cavity and the glue coating cavity, and a break is formed between the recovery cavity and the glue coating cavity; and / or,

[0038] The recovery pipeline includes a first recovery branch pipe, a second recovery branch pipe, and a recovery main pipe. The first recovery branch pipe, the second recovery branch pipe, and the recovery main pipe are connected and communicated through a second three-way valve. When the second three-way valve is in the first working position, the first recovery branch pipe and the recovery main pipe are communicated, so that a path is formed between the collection box and the glue storage cavity, and a break is formed between the collection box and the recovery cavity. When the second three-way valve is in the second working position, the second recovery branch pipe and the recovery main pipe are communicated, so that a break is formed between the collection box and the glue storage cavity, and a path is formed between the collection box and the recovery cavity. When the second three-way valve is in the third working position, a break is formed between the collection box and the glue storage cavity, and a break is formed between the collection box and the recovery cavity.

[0039] In some embodiments, the glue storage container and the recovery container are stacked, and a first liquid pump is arranged on the glue replenishing pipeline. The first liquid pump is configured to pump the glue liquid in the recovery container into the glue storage container.

[0040] In some embodiments, the glue storage container and the recovery container are stacked vertically, and / or, the glue storage container and the recovery container are integrally arranged.

[0041] In some embodiments, a temperature control device is arranged on the glue storage container. The temperature control device includes a temperature control pipeline, a temperature regulator and a liquid pump arranged on the temperature control pipeline. The inlet and outlet of the temperature control pipeline are both communicated with the glue storage cavity.

[0042] Another object of the present invention is to provide a glue coating device, which includes the glue liquid circulation system as described above.

[0043] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art: The glue solution circulation system provided by the embodiment of the present utility model has the glue application cavity of the glue application mechanism communicated with the glue storage cavity of the glue storage container, and the collection box communicated with the recovery cavity of the recovery container, which can realize the online recovery and reuse of the glue solution, avoiding the glue solution dripping onto the machine table of the glue application equipment during the glue application process of the glue application mechanism, polluting the machine table and wasting the glue solution at the same time; the recycled glue solution is reused, improving the utilization rate of the glue solution and reducing the production cost of glue application; the recovery and reuse of the glue solution are both completed online in real time without offline operation, improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG. Figure 1 is a schematic structural diagram of the glue solution circulation system in Embodiment 1 of the present utility model, showing the flow direction of the glue solution when the glue solution circulation system is in the first working state;

[0045] FIG. Figure 2 is a schematic structural diagram of the glue solution circulation system in Embodiment 1 of the present utility model, showing the flow direction of the glue solution when the glue solution circulation system is in the second working state;

[0046] FIG. Figure 3 is a first schematic structural diagram of the glue application device in some embodiments;

[0047] FIG. Figure 4 is a second schematic structural diagram of the glue application device in some embodiments;

[0048] FIG. Figure 5 is a third schematic structural diagram of the glue application device in some embodiments;

[0049] FIG. Figure 6 is Figure 5 a schematic diagram of the glue discharging state of the glue application device in

[0050] FIG. Figure 7 is a fourth schematic structural diagram of the glue application device in some embodiments;

[0051] FIG. Figure 8 is a schematic structural diagram of the glue solution circulation system in Embodiment 2 of the present utility model, showing the flow direction of the glue solution when the glue solution circulation system is in the third working state;

[0052] FIG. Figure 9 is a schematic structural diagram of the glue solution circulation system in Embodiment 3 of the present utility model, showing the flow direction of the glue solution when the glue solution circulation system is in the first working state;

[0053] FIG. Figure 10 is a schematic structural diagram of the glue solution circulation system in Embodiment 4 of the present utility model, showing the flow direction of the glue solution when the glue solution circulation system is in the first working state;

[0054] Appendix Figure 11 It is a schematic structural diagram of the glue solution circulation system in Embodiment 4 of the present utility model, which shows the flow direction of the glue solution when the glue solution circulation system is in the third working state;

[0055] Appendix Figure 12 It is a schematic structural diagram of the glue solution circulation system in Embodiment 5 of the present utility model, which shows the flow direction of the glue solution when the glue solution circulation system is in the first working state;

[0056] Appendix Figure 13 It is a schematic structural diagram of the glue solution circulation system in Embodiment 5 of the present utility model, which shows the flow direction of the glue solution when the glue solution circulation system is in the third working state;

[0057] Appendix Figure 14 It is a schematic structural diagram of the glue solution circulation system in Embodiment 6 of the present utility model, which shows the flow direction of the glue solution when the glue solution circulation system is in the third working state;

[0058] Appendix Figure 15 It is a schematic structural diagram of the stacked storage glue container and recovery container in Embodiment 6 of the present utility model;

[0059] Appendix Figure 16 It is a schematic structural diagram of the glue solution circulation system in Embodiment 7 of the present utility model, which shows the first route of the glue solution circulation;

[0060] Appendix Figure 17 It is a schematic structural diagram of the glue solution circulation system in Embodiment 7 of the present utility model, which shows the second route of the glue solution circulation;

[0061] Wherein: 1. Glue coating device; 110. Product conveying device; 120. Glue coating mechanism; 121. Device body; 122. Glue coating pipe; 123. Connecting pipe; 124. Upper glue coating wheel; 1241. First glue outlet hole; 1242. Second glue outlet hole; 1243. First half hole; 125. Lower glue coating wheel; 1251. Second half hole; 130. Collection box;

[0062] 2. Storage glue container; 3. Recovery container;

[0063] 4. Glue inlet pipeline; 41. Third liquid pump; 42. First three-way valve; 43. First glue inlet branch pipe; 44. Second glue inlet branch pipe; 45. Glue inlet main pipe;

[0064] 5. Recovery pipeline; 50. Second valve; 51. Second liquid pump; 52. Second three-way valve; 53. First recovery branch pipe; 54. Second recovery branch pipe; 55. Recovery main pipe;

[0065] 6. Glue filling pipeline; 60. First valve; 61. First liquid pump; 7. First control valve assembly; 71. First pneumatic control valve; 72. First control valve; 73. First air supply pipeline; 8. Second control valve assembly; 81. Second pneumatic control valve; 82. Second control valve; 83. Second air supply pipeline;

[0066] 9. Third air supply pipeline; 10. Third control valve; 11. First pressure regulating valve; 12. First liquid level sensor; 13. Fourth air supply pipeline; 14. Fourth control valve; 15. Second pressure regulating valve; 16. Second liquid level sensor; 17. Viscosity sensor; 18. Stirring device; 20. Product to be processed; 21. Temperature sensor; 22. Temperature control pipeline; 23. Temperature regulator; 24. Defoaming device; 25. Filtering device; 26. Weight sensor. Detailed implementation manners

[0067] The following elaborates on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, but they do not limit the present utility model.

[0068] Embodiment 1

[0069] Figures 3 to 7 Exemplarily, some schematic diagrams of a glue coating device 1 are provided. The glue coating device 1 includes a glue coating mechanism 120 for coating glue on a product 20 to be processed, and a collection box 130 capable of receiving the glue dripping from the glue coating mechanism 120. The glue coating mechanism 120 has a glue coating cavity, and the glue coating cavity is connected and communicated with a glue discharging component, and the glue is coated on the product 20 to be processed through the glue discharging component. The collection box 130 is located below the glue discharging component, and it can receive the glue dripping from the glue coating mechanism 120 and the product 20 to be processed.

[0070] See Figure 1 , Figure 2 the glue liquid circulation system, which includes a glue storage container 2, a recovery container 3, a glue inlet pipeline 4, a recovery pipeline 5 and a glue filling pipeline 6. Among them, the glue storage container 2 has a glue storage cavity, the recovery container 3 has a recovery cavity, the glue inlet pipeline 4 is connected between the glue coating device 1 and the glue storage container 2, and it communicates the glue coating cavity of the glue coating mechanism 120 with the glue storage cavity of the glue storage container 2 to output the glue liquid in the glue storage container 2 to the glue coating mechanism 120, so as to be coated on the product 20 to be processed to realize glue coating processing. The recovery pipeline 5 is connected between the glue coating device 1 and the recovery container 3, and it communicates the collection box 130 with the recovery cavity to transport the glue received by the collection box 130 into the recovery cavity to realize the recovery of the glue liquid. The glue filling pipeline 6 is connected between the recovery container 3 and the glue storage container 2, and the glue filling pipeline 6 communicates the recovery cavity with the glue storage cavity to transport the glue liquid in the recovery cavity to the glue storage cavity to realize glue supply.

[0071] Through the application of the above solution, on-line recovery and reuse of the glue can be achieved, avoiding the glue dripping onto the machine table of the gluing mechanism 120 during the gluing process, contaminating the machine table and wasting the glue at the same time; the recovered glue is reused, improving the utilization rate of the glue and reducing the gluing cost; the recovery and reuse of the glue are both completed on-line and in real time, without off-line operation, improving the production efficiency.

[0072] In some embodiments, such as Figure 3 or Figure 4 As shown, a product conveying device 110 and a gluing mechanism 120 are provided on the gluing device 1. The product conveying device 110 can convey the product 20 to be processed to the gluing station; at the gluing station, the gluing mechanism 120 can glue the product 20 to be processed. During the gluing process, the glue will drip from the product 20 to be processed or directly from the gluing mechanism 120. Therefore, a collection box 130 is provided below the gluing mechanism 120 for collecting the dripping glue. The feed pipe 4 is connected and communicated with the gluing mechanism 120, so as to convey the glue in the glue storage container 2 to the gluing mechanism 120. The recovery pipe 5 is connected and communicated with the glue collection box 130, so as to convey the glue in the glue collection box 130 to the recovery container 3.

[0073] Specifically, Figure 3 The first structure of the gluing mechanism 120 is shown. The gluing mechanism 120 includes a gluing mechanism body 121 and a gluing pipe 122 connected to the gluing mechanism body 121. A gluing cavity (not shown in the figure) is provided in the gluing mechanism body 121. The gluing pipe 122 is communicated with the gluing cavity, and the feed pipe 4 is communicated with the gluing cavity.

[0074] Figure 4The second structure of the glue application mechanism 120 is shown. The glue application mechanism 120 includes a connecting pipe 123, an upper glue application wheel 124, and a lower glue application wheel 125. The lower wheel surface of the upper glue application wheel 124 and the upper wheel surface of the lower glue application wheel 125 are spaced apart. Glue passing holes are formed in the upper glue application wheel 124, and the glue passing holes communicate with the upper wheel surface and the lower wheel surface of the upper glue application wheel 124. The connecting pipe 123 is connected to the upper glue application wheel 124 and communicates with the glue passing holes. The feed pipe 4 is connected to and communicates with the connecting pipe 123. The connecting pipe 123 is hinged to the upper glue application wheel 124 (for example, connected by a quick connector or a ball joint), or the feed pipe 4 is hinged to the connecting pipe 123 (for example, connected by a quick connector or a ball joint). A glue application gap is formed between the upper glue application wheel 124 and the lower glue application wheel 125, and the glue application gap is used to accommodate the glue flowing out of the glue passing holes. In the working state, the glue can flow from the feed pipe 4 into the glue passing holes, and then from the glue passing holes into the glue application gap. At the glue application station, the edge of the product 20 to be processed can be immersed in the glue in the glue application gap, and the edge of the product 20 to be processed and the glue application gap move relative to each other to coat the glue on the edge of the product 20 to be processed. Specifically, the glue application mechanism 120 can move around the product 20 to be processed, or the product 20 to be processed can move along the extension direction of its own edge.

[0075] When both the upper glue application wheel 124 and the lower glue application wheel 125 are rotatably arranged, the glue can be evenly coated on the edges of the upper and lower surfaces and the side surface of the product 20 to be processed by the rotation of the upper glue application wheel 124 and the lower glue application wheel 125. The upper glue application wheel 124 and the lower glue application wheel 125 can be connected by a connecting shaft so that the two can rotate synchronously. Of course, the upper glue application wheel 124 and the lower glue application wheel 125 can also be both fixedly arranged, or one of the upper glue application wheel 124 and the lower glue application wheel 125 can be rotatably arranged. Preferably, the upper glue application wheel 124 provided with the glue passing holes is rotatably arranged. If the glue passing holes are separately or simultaneously formed in the lower glue application wheel 125, the lower glue application wheel 125 is also rotatably arranged. Among them, the product 20 to be processed can be a battery cell, a PCB, an FPC, or a chip.

[0076] As Figure 5 、 Figure 6Shown is the first improvement of the second structure of the glue application mechanism 120. The glue passing hole includes a first glue outlet hole 1241 communicating with the connecting pipe 123, and a second glue outlet hole 1242 communicating the first glue outlet hole 1241 with the lower surface of the upper glue application wheel 124. The rotating shaft of the upper glue application wheel 124 is a vertical shaft, and the second glue outlet hole 1242 extends in the vertical direction. There are multiple second glue outlet holes 1242, and the multiple second glue outlet holes 1242 are arranged at intervals along the circumferential direction (which can also be the rotating direction) of the upper glue application wheel 124, preferably arranged at equal intervals (which can also be called equi-circumferential array arrangement). The first glue outlet hole 1241 is equivalent to a cavity for caching glue liquid, forming an environment of equal hydraulic pressure. After the glue liquid is cached in the first glue outlet hole 1241, it can flow out from the multiple second glue outlet holes 1242 with the same pressure, so that the glue liquid can flow out evenly from the multiple second glue outlet holes 1242. Among them, the first glue outlet hole 1241 is formed as a glue application cavity.

[0077] When the upper glue application wheel 124 is rotatably arranged, the glue liquid flowing out from the second glue outlet hole 1242 moves in a centrifugal motion under the action of centrifugal force, and the glue liquid deflects in the direction away from the rotation center of the upper glue application wheel 124, that is, in the direction towards the product to be processed 20, so that the glue liquid can better adhere to the edge of the product to be processed 20 under the action of centrifugal force.

[0078] As Figure 7 Shown is the second improvement of the second structure of the glue application mechanism 120. The glue passing hole includes a first glue outlet hole 1241 communicating with the connecting pipe 123, and a second glue outlet hole 1242 communicating the first glue outlet hole 1241 with the lower surface of the upper glue application wheel 124. The glue passing hole further includes a first half hole 1243 on the lower surface of the upper glue application wheel 124 and a second half hole 1251 on the upper surface of the lower glue application wheel 125. The first half hole 1243 and the second half hole 1251 cooperate with each other to form a complete glue outlet hole. There are multiple first half holes 1243, and the multiple first half holes 1243 are arranged along the radial direction of the upper glue application wheel 124 and are spaced circumferentially, preferably arranged at equal intervals (which can also be called equi-circumferential array arrangement); there are multiple second half holes 1251, and the multiple second half holes 1251 are arranged along the radial direction of the lower glue application wheel 125 and are spaced circumferentially, preferably arranged at equal intervals (which can also be called equi-circumferential array arrangement).

[0079] The rotating shaft of the upper glue - applying wheel 124 is a vertical shaft. The second glue - discharging hole 1242 extends along the vertical direction and is opened at the middle position of the upper glue - applying wheel 124. The upper end of the second glue - discharging hole 1242 communicates with the first glue - discharging hole 1241, and the lower end of the second glue - discharging hole 1242 communicates with the second half - hole 1251. In a preferred embodiment, the upper glue - applying wheel 124 and the lower glue - applying wheel 125 rotate synchronously. For example, the upper glue - applying wheel 124 and the lower glue - applying wheel 125 can be connected by a connecting shaft so that they can rotate synchronously. A plurality of first half - holes 1243 and the corresponding plurality of second half - holes 1251 can be closed during assembly to form a plurality of complete glue - discharging holes, and the lower end of the second glue - discharging hole 1242 communicates with the complete glue - discharging holes. The first glue - discharging hole 1241 is equivalent to a cavity for caching glue liquid, forming an equal - hydraulic - pressure environment. The first glue - discharging hole 1241 is thus formed as a glue - applying cavity. After the glue liquid is cached in the first glue - discharging hole 1241, it can flow to the glue - applying gap from a plurality of first half - holes 1243 or a plurality of complete glue - discharging holes with the same pressure, so that the glue liquid can flow evenly from a plurality of first half - holes 1243 or a plurality of complete glue - discharging holes to the glue - applying gap.

[0080] The glue - liquid circulation system further includes a first control - valve assembly 7 and a second control - valve assembly 8, where: The first control - valve assembly 7 includes a first valve. In this embodiment, the first valve is specifically a first pneumatic control valve 71. The first pneumatic control valve 71 is arranged on the glue - replenishing pipeline 6. The first pneumatic control valve 71 can be switched between an open state and a closed state by gas control. Among them, when the first pneumatic control valve 71 is in the open state, the recovery cavity and the glue - storage cavity are interconnected, and the glue liquid in the recovery cavity can flow into the glue - storage cavity to replenish the glue liquid in the glue - storage cavity; when the first pneumatic control valve 71 is in the closed state, the recovery cavity and the glue - storage cavity are not interconnected, and at this time, the glue liquid in the recovery cavity cannot flow into the glue - storage cavity. The second control - valve assembly 8 includes a second valve. In this embodiment, the second valve is specifically a second pneumatic control valve 81. The second pneumatic control valve 81 is arranged on the recovery pipeline 5. The second pneumatic control valve 81 can also be switched between an open state and a closed state by gas control. Among them, when the second pneumatic control valve 81 is in the open state, the collection box 130 and the recovery cavity are interconnected, and the glue liquid in the collection box 130 can enter the recovery cavity through the recovery pipeline 5 to achieve recovery; when the second pneumatic control valve 81 is in the closed state, the collection box 130 and the recovery cavity are not interconnected.

[0081] In some embodiments, the glue - liquid circulation system has a switchable first working state and second working state. When the glue - liquid circulation system is in the first working state, such as Figure 1As shown, the first pneumatic control valve 71 is in the closed state and the second pneumatic control valve 81 is in the open state. At this time, a first medium passage for coating and recovering the glue liquid is formed among the glue storage cavity, the glue feeding pipeline 4, the coating cavity of the coating mechanism 120, the collection box 130, the recovery pipeline 5 and the recovery cavity. The glue liquid in the glue storage cavity enters the coating cavity through the glue feeding pipeline 4 and is coated on the product 20 to be processed. The glue liquid dripping from the coating mechanism 120 or the product 20 to be processed is collected by the collection box 130 and enters the recovery cavity through the recovery pipeline 5. When the glue liquid circulation system is in the second working state, as Figure 2 shown, the first pneumatic control valve 71 is in the open state and the second pneumatic control valve 81 is in the closed state. At this time, a second medium passage for supplementing the glue liquid to the glue storage cavity is formed among the recovery cavity, the glue replenishing pipeline 6 and the glue storage cavity. The glue storage cavity stops supplying the glue liquid to the coating mechanism 120, and the recovery cavity supplements the glue liquid into the glue storage cavity through the glue replenishing pipeline 6.

[0082] In some embodiments, the glue liquid circulation system has a third working state and a fourth working state. When the glue liquid circulation system is in the third working state, both the first pneumatic control valve 71 and the second pneumatic control valve 81 are in the open state. A first medium passage for coating and recovering the glue liquid is formed among the glue storage cavity, the glue feeding pipeline 4, the coating cavity of the coating mechanism 120, the collection box 130, the recovery pipeline 5 and the recovery cavity. The glue liquid in the glue storage cavity enters the coating cavity through the glue feeding pipeline 4 and is coated on the product 20 to be processed. The glue liquid dripping from the coating mechanism 120 or the product 20 to be processed is collected by the collection box 130 and enters the recovery cavity through the recovery pipeline 5. A second medium passage for supplementing the glue liquid to the glue storage cavity is formed among the recovery cavity, the glue replenishing pipeline 6 and the glue storage cavity. The recovery cavity supplements the glue liquid into the glue storage cavity through the glue replenishing pipeline 6. When the glue liquid circulation system is in the fourth working state, both the first pneumatic control valve 71 and the second pneumatic control valve 81 are in the closed state, and both the first medium passage and the second medium passage are blocked, and the glue liquid circulation system is in the shutdown state.

[0083] According to the process requirements, the glue liquid circulation system has switchable first, second and fourth working states; or, the glue liquid circulation system has switchable third and fourth working states; or, the glue liquid circulation system has switchable first, second, third and fourth working states.

[0084] In the technical solution of this embodiment, the glue application mechanism 120 of the glue application device 1 is in communication with the glue storage chamber of the glue storage container 2 and the recovery chamber of the recovery container 3. When it is necessary to recover the glue in the glue application mechanism 120 to the recovery chamber or supply the glue in the recovery chamber to the glue storage chamber, the corresponding pneumatic control valve (the first pneumatic control valve 71 or the second pneumatic control valve 81) can be opened. The glue circulation system is mainly controlled by pneumatic control valves. When the pneumatic control valves are in the closed state, the glue in the pipelines (the glue supply pipeline 4, the recovery pipeline 5 or the replenishment pipeline 6) does not come into contact with the outside world and is not easily cured, so it will not cause blockage and failure of the pipelines, ensuring the long-term stable operation of the glue circulation system.

[0085] Specifically, the first pneumatic control valve 71 and the second pneumatic control valve 81 are similar to the cylinder structure. When the first pneumatic control valve 71 is opened, the valve stem of the first pneumatic control valve 71 (similar to the cylinder rod) extends into the replenishment pipeline 6 to block the replenishment pipeline 6; when the first pneumatic control valve 71 is closed, the valve stem of the first pneumatic control valve 71 retracts from the replenishment pipeline 6 to open the replenishment pipeline 6. The structure and operation process of the second pneumatic control valve 81 are the same as or similar to those of the first pneumatic control valve 71. When the viscosity of the glue is relatively high, the first pneumatic control valve 71 and the second pneumatic control valve 81 can provide a large opening and closing force, which can reduce the risk of failure caused by being stuck by the glue.

[0086] In other embodiments, the first pneumatic control valve 71 and the second pneumatic control valve 81 can be replaced by one-way check valves or other types of valves.

[0087] See Figure 1 、 Figure 2 As shown in, in this embodiment, the first control valve assembly 7 further includes a first air supply pipeline 73 and a first control valve 72. The first air supply pipeline 73 is connected to the first pneumatic control valve 71 and is used to introduce a gas medium into the first pneumatic control valve 71, so as to convert the first pneumatic control valve 71 from the closed state to the open state or keep it in the open state during the process of introducing the gas medium into the first pneumatic control valve 71, thereby enabling communication between the recovery chamber and the glue storage chamber. The first control valve 72 is provided on the first air supply pipeline 73 and is used to control the opening and closing of the first air supply pipeline 73. Among them, the first control valve 72 is specifically an electromagnetic valve here. The electromagnetic valve has an air inlet and an air outlet. The air inlet is used to connect to the air source, and the air outlet is used to connect to the first pneumatic control valve 71. The electromagnetic valve has a switchable first working position and second working position. When the electromagnetic valve is in the first working position, the air inlet and the air outlet of the electromagnetic valve are interconnected, so that the air source can supply the gas medium to the first pneumatic control valve 71; when the electromagnetic valve is in the second working position, the air inlet and the air outlet of the electromagnetic valve are not interconnected, and at this time the air source cannot supply the gas medium to the first pneumatic control valve 71, so that the first pneumatic control valve 71 remains in the closed state. In this embodiment, the gas medium provided by the above air source is compressed air.

[0088] Similarly, the second control valve assembly 8 further includes a second gas supply pipeline 83 and a second control valve 82. The second gas supply pipeline 83 is connected to the second pneumatic control valve 81 and is used to introduce a gas medium into the second pneumatic control valve 81, so as to convert the second pneumatic control valve 81 from a closed state to an open state or keep it in an open state during the process of introducing the gas medium into the second pneumatic control valve 81, and further enable the collection box 130 to communicate with the recovery cavity for recovering the glue solution. The second control valve 82 is arranged on the second gas supply pipeline 83 and is used to control the opening and closing of the second gas supply pipeline 83. Here, the second control valve 82 is also a solenoid valve, and its structure is similar to that of the solenoid valve as the first control valve 72, which will not be elaborated here.

[0089] In some embodiments, the glue solution circulation system further includes a first liquid level sensor 12 for detecting the liquid level in the glue storage cavity. The first liquid level sensor 12 is communicatively connected between the first control valve assembly 7 and the second control valve assembly 8. When the first liquid level sensor 12 detects that the liquid level of the glue solution drops below a set liquid level, the supply of glue to the glue application mechanism 120 is stopped through the cooperation of the first control valve assembly 7 and the second control valve assembly 8, and the recovery cavity replenishes the glue solution into the glue storage cavity; when the first liquid level sensor 12 detects that the liquid level of the glue solution reaches another higher set liquid level, the replenishment of the glue solution into the glue storage cavity is stopped through the cooperation of the first control valve assembly 7 and the second control valve assembly 8.

[0090] The glue solution circulation system further includes a feeding device (not shown in the figure) for replenishing glue solution or diluent into the recovery cavity, and a glue solution state detection element. The glue solution state detection element is communicatively connected to the feeding device. In this embodiment, the glue solution state detection element includes a second liquid level sensor 16 for detecting the liquid level in the recovery cavity and a viscosity sensor 17 for detecting the viscosity of the glue solution in the recovery cavity. The above-mentioned second liquid level sensor 16 and viscosity sensor 17 are respectively communicatively connected to the feeding device. That is to say, when the second liquid level sensor 16 detects that the liquid level in the recovery cavity is low and needs to replenish the glue solution, or when the viscosity sensor 17 detects that the viscosity of the glue solution in the recovery cavity is too high or too low and does not meet the production requirements, the feeding device is used to add diluent or new glue solution into the recovery cavity. The glue solution circulation system further includes a stirring device 18 for stirring the medium in the recovery cavity. After adding new glue solution or diluent into the recovery cavity, the medium in the recovery cavity is mixed evenly by the stirring device 18. It should be noted here that the feeding device is used to replenish glue solution or diluent into the recovery cavity, rather than directly replenishing glue solution or diluent into the glue storage cavity. During the feeding process, the work of the glue storage cavity will not be affected, and the glue storage cavity can continuously supply glue to the glue application mechanism 120, so that the glue application mechanism 120 can continuously apply glue, improving the glue application efficiency of the glue application mechanism 120.

[0091] In this embodiment, the glue liquid circulation system further includes a first power mechanism. Refer to Figure 1 , Figure 2 As shown, the first power mechanism includes a third air supply pipe 9, a third control valve 10 provided on the third air supply pipe 9 and used to control the opening and closing of the third air supply pipe 9, and an air source. The third air supply pipe 9 is connected between the air source and the glue storage container 2, and is communicated with the glue storage cavity for injecting a gas medium into the glue storage cavity. In this way, when the glue liquid circulation system is in the first working state, the third control valve 10 is opened to introduce a gas medium into the glue storage cavity. Here, the gas medium is compressed air, so that the glue liquid in the glue storage cavity flows from the glue storage cavity to the glue inlet pipe 4 under the action of the compressed gas and then flows into the glue coating cavity of the glue coating mechanism 120, and then the glue liquid collected by the collection box 130 enters the recovery cavity through the recovery pipe 5. Here, the third control valve 10 is also an electromagnetic valve, and its structure is similar to that of the electromagnetic valve serving as the first control valve 72, which will not be elaborated here. A first pressure regulating valve 11 is provided on the third air supply pipe 9 for adjusting the air supply pressure to adjust the pressure of the compressed air entering the glue storage cavity to be within a set range. By compressing the air in the glue storage cavity and keeping the pressure of the compressed air in the glue storage cavity within a set range, the glue liquid in the glue storage cavity can be continuously pressed into the glue coating mechanism 120 of the glue coating device 1, ensuring that the flow rate of the glue liquid entering the glue coating mechanism 120 remains within a stable range, so that the glue liquid output from the glue coating mechanism 120 can be evenly coated on the product 20 to be processed. Preferably, by compressing the air in the glue storage cavity and keeping the pressure of the compressed air in the glue storage cavity at a fixed value, the glue liquid in the glue storage cavity can be continuously pressed into the glue coating mechanism 120 on the glue coating device 1, ensuring that the flow rate of the glue liquid entering the glue coating mechanism 120 is a fixed value, so that the glue liquid output from the glue coating mechanism 120 can be evenly coated on the product 20 to be processed.

[0092] When the glue coating mechanism 120 is the aforementioned second structure, the glue coating mechanism 120 includes an upper glue coating wheel 124 and a lower glue coating wheel 125. The upper glue coating wheel 124 is rotatably arranged. By controlling the pressure of the compressed air in the glue storage cavity and the rotation speed of the upper glue coating wheel 124, the pressure difference between the inlet and outlet of the glue passing hole is kept within a preset range, or the pressure difference between the pressure of the compressed air in the glue storage cavity and the outlet of the glue passing hole is kept within a preset range, so that the glue liquid can flow out of the glue passing hole evenly and stably.

[0093] In this embodiment, the glue liquid circulation system further includes a second power mechanism. Refer to Figure 1 , Figure 2As shown in the figure, the second power mechanism includes a fourth air supply pipeline 13, a fourth control valve 14 provided on the fourth air supply pipeline 13 and used to control the opening and closing of the fourth air supply pipeline 13, and an air source. The fourth air supply pipeline 13 is connected between the air source and the recovery container 3, and is communicated with the recovery chamber for injecting a gas medium into the recovery chamber. In this way, when the glue liquid circulation system is in the second working state, the fourth control valve 14 is opened to introduce a gas medium into the recovery chamber. Here, the gas medium is compressed air, so that the glue liquid in the recovery chamber flows from the recovery chamber to the glue replenishing pipeline 6 and then into the glue storage chamber under the action of the compressed air. Here, the fourth control valve 14 is also a solenoid valve, and its structure is similar to that of the solenoid valve serving as the first control valve 72, so it will not be elaborated here. A second pressure regulating valve 15 is provided on the fourth air supply pipeline 13 to adjust the air supply pressure, so as to adjust the pressure of the compressed air entering the recovery chamber and control it within a set range.

[0094] In this embodiment, the above-mentioned first power mechanism and second power mechanism are adopted, and the glue liquid is driven by air pressure in the glue liquid pipeline, which enables the glue liquid to flow evenly and is beneficial to improving the glue coating quality.

[0095] In other embodiments, the glue liquid circulation system further includes a third power mechanism, which is a vacuum pumping mechanism used to pump the recovery chamber to vacuum, so as to suck the glue liquid in the collection box 130 into the recovery chamber under negative pressure. The advantage of this setting is that in order to facilitate the collection of the glue liquid dripping from the glue coating mechanism 120 or the product 20 to be processed, the collection box 130 is set as an open structure, so compressed air cannot be used to drive the glue liquid flow inside it. By using the method of pumping the recovery chamber to vacuum, the glue liquid can be sucked from the collection box 130 into the recovery chamber through the negative pressure acting force. As an alternative, the third power mechanism can also adopt a liquid pump, which is arranged on the recovery pipeline 5 to pump the glue liquid in the collection box 130 into the recovery chamber through the recovery pipeline 5.

[0096] In this embodiment, the collection box 130 is higher than the recovery chamber in the vertical direction. When the collection box 130 is communicated with the recovery chamber, the pressure of the glue liquid in the collection box 130 is greater than the pressure of the glue liquid in the recovery chamber, so that the glue liquid in the collection box 130 can automatically flow into the recovery chamber through the recovery pipeline 5. By using the self-gravity of the glue liquid and the principle of the U-shaped tube, the glue liquid in the collection box 130 can automatically flow into the recovery chamber through the recovery pipeline 5.

[0097] In some embodiments, during the gluing process of the product, when there is enough glue in the glue storage cavity, the control system controls the first control valve 72 to close, so that the first pneumatic control valve 71 remains closed, the second control valve 82 opens, so that the second pneumatic control valve 81 opens and remains open, the third control valve 10 opens and the fourth control valve 14 closes. Compressed air enters the glue storage cavity, so that the glue in the glue storage cavity enters the gluing cavity on the gluing mechanism 120 through the glue inlet pipe 4 and then acts on the product 20 to be processed. The glue collected by the collection box 130 then enters the recovery cavity through the recovery pipe 5.

[0098] When the first liquid level sensor 12 detects that the glue in the glue storage cavity drops below the set liquid level, the control system controls the first control valve 72 to open, so that the first pneumatic control valve 71 opens and remains open, the second control valve 82 closes, so that the second pneumatic control valve 81 closes and remains in the closed state. At the same time, the third control valve 10 closes and the fourth control valve 14 opens. Compressed air enters the recovery cavity, so that the glue in the recovery cavity enters the glue storage cavity through the glue replenishment pipe 6 to replenish the glue in the glue storage cavity.

[0099] Embodiment 2

[0100] See Figure 8 As shown, the main difference between this embodiment and Embodiment 1 is that the second power mechanism is omitted in this embodiment. In this embodiment, the recovery cavity is higher than the glue storage cavity in the vertical direction, so that in the second working state, the pressure of the glue in the recovery cavity is greater than the pressure of the glue in the glue storage cavity. In this way, without introducing compressed air into the recovery cavity, the glue in the recovery cavity can automatically flow into the glue storage cavity through the glue replenishment pipe 6; by using the self-gravity of the glue and the principle of the U-shaped tube, the glue in the recovery cavity can automatically flow into the glue storage cavity through the glue replenishment pipe 6, omitting the second power mechanism, making the structure of the glue circulation system relatively simple.

[0101] Embodiment 3

[0102] Refer to Figure 9 A glue circulation system as shown, the main difference between it and Embodiment 1 is that the first valve 60 provided on the glue replenishment pipe 6 in this embodiment is a one-way valve, and the second valve 50 provided on the recovery pipe 5 is also a one-way valve. A first liquid pump 61 is also provided on the glue replenishment pipe 6, a second liquid pump 51 is provided on the recovery pipe 5, and a third liquid pump 41 is also provided on the glue inlet pipe 4.

[0103] In other embodiments, a third valve can be provided on the glue inlet pipe 4, and the third valve is a one-way valve.

[0104] In other embodiments, the first valve 60 and / or the second valve 50 can be not provided.

[0105] In other embodiments, a liquid pump may be provided on any one or any two of the glue feeding pipeline 4, the recycling pipeline 5, and the glue replenishing pipeline 6. The flow of the glue in the pipelines without the liquid pump can be realized by the gravity of the glue itself and the principle of the U-shaped tube.

[0106] During the process of supplying glue to the glue coating mechanism 120 for coating the glue on the product 20 to be processed, the third liquid pump 41 operates, capable of pumping the glue in the glue storage cavity into the glue coating mechanism 120, and the second liquid pump 51 operates, capable of pumping the glue in the collection box 130 into the recycling cavity, while the first liquid pump 61 does not operate.

[0107] When it is necessary to replenish the glue in the recycling cavity into the glue storage cavity, the first liquid pump 61 operates, capable of pumping the glue in the recycling cavity into the glue storage cavity. The third liquid pump 41 may keep operating or not operating, and the second liquid pump 51 may keep operating or not operating.

[0108] Through the technical solution in this embodiment, on-line recycling and reuse of the glue can be realized, avoiding the glue dripping onto the machine table of the glue coating device 1 during the glue coating process of the glue coating mechanism 120, polluting the machine table and wasting the glue at the same time; the recycled glue is reused, improving the utilization rate of the glue and reducing the production glue coating cost; the recycling and reuse of the glue are both completed on-line and in real time, without off-line operation, improving the production efficiency.

[0109] On the premise of not violating the principle of this embodiment, the technical solutions in Embodiments 1 and 2 can be applied to this embodiment.

[0110] Embodiment 4

[0111] Reference Figures 10 to 11 As shown in a glue circulation system, the main difference from Embodiment 3 is that the first valve 60 is integrated in the first liquid pump 61, and the second valve 50 is integrated in the second liquid pump 51.

[0112] When the glue circulation system is in the first working state, as Figure 10 shown, the third liquid pump 41 is turned on, the second valve 50 is opened and the second liquid pump 51 is turned on. At this time, a first medium passage for coating and recycling the glue is formed among the glue storage cavity, the glue feeding pipeline 4, the glue coating cavity of the glue coating mechanism 120, the collection box 130, the recycling pipeline 5, and the recycling cavity. The glue in the glue storage cavity enters the glue coating cavity through the glue feeding pipeline 4 and is coated on the product 20 to be processed. The glue dripping from the glue coating mechanism 120 or the product 20 to be processed is collected by the collection box 130 and enters the recycling cavity through the recycling pipeline 5.

[0113] When the glue solution circulation system is in the third working state, the third liquid pump 41 is turned on, the second valve 50 is opened and the second liquid pump 51 is turned on, the first valve 60 is opened and the first liquid pump 61 is turned on. A first medium passage for coating and recycling the glue solution is formed among the glue storage cavity, the glue inlet pipe 4, the coating cavity of the coating mechanism 120, the collection box 130, the recycling pipe 5 and the recycling cavity. The glue solution in the glue storage cavity enters the coating cavity through the glue inlet pipe 4 and is coated on the product 20 to be processed. The glue solution dripping from the coating mechanism 120 or the product 20 to be processed is collected by the collection box 130 and enters the recycling cavity through the recycling pipe 5. A second medium passage for replenishing the glue solution to the glue storage cavity is formed among the recycling cavity, the glue replenishing pipe 6 and the glue storage cavity. The recycling cavity replenishes the glue solution into the glue storage cavity through the glue replenishing pipe 6.

[0114] When the glue solution circulation system is in the fourth working state, the third liquid pump 41 is turned off, the second valve 50 is closed and the second liquid pump 51 is turned off, the first valve 60 is closed and the first liquid pump 61 is turned off. Both the first medium passage and the second medium passage are blocked, and the glue solution circulation system is in a shutdown state.

[0115] In other embodiments, a third valve may be provided on the glue inlet pipe 4, and the third valve may also be integrated in the third liquid pump 41.

[0116] Through the technical solution in this embodiment, on-line recycling and reuse of the glue solution can be achieved, avoiding the glue solution dripping onto the machine table of the coating device 1 during the coating process of the coating mechanism 120, polluting the machine table and wasting the glue solution at the same time. The recycled glue solution is reused, improving the utilization rate of the glue solution and reducing the production coating cost. The recycling and reuse of the glue solution are both completed on-line and in real time, without off-line operation, improving the production efficiency.

[0117] On the premise of not violating the principle of this embodiment, the technical solutions in Embodiments 1 and 2 can be applied to this embodiment.

[0118] Embodiment 5

[0119] As Figure 12 and Figure 13 shown, in combination with Figures 3 to 7 , a glue solution circulation system is provided. The glue solution circulation system is used for the coating device 1. The coating device 1 includes a coating mechanism 120 for coating the glue solution on the product 20 to be processed, and a collection box 130 capable of receiving the glue solution dripping from the coating mechanism 120. The coating mechanism 120 has a coating cavity, and the coating cavity is connected and communicated with a glue discharging component, and the glue solution is coated on the product 20 to be processed through the glue discharging component. The collection box 130 is located below the glue discharging component, and it can receive the glue solution dripping from the coating mechanism 120 and the product 20 to be processed.

[0120] See Figure 12 、Figure 13 The glue liquid circulation system includes a glue storage container 2, a recovery container 3, a glue supply pipeline 4, a recovery pipeline 5 and a replenishment pipeline 6. Among them, the glue storage container 2 has a glue storage cavity, the recovery container 3 has a recovery cavity, the glue supply pipeline 4 is connected between the glue coating device 1 and the glue storage container 2, and it communicates the glue coating cavity of the glue coating mechanism 120 with the glue storage cavity of the glue storage container 2, so as to output the glue liquid in the glue storage container 2 to the glue coating mechanism 120, and then coat it on the product 20 to be processed to realize glue coating processing. The recovery pipeline 5 is connected between the glue coating device 1 and the recovery container 3, and it communicates the collection box 130 with the recovery cavity, so as to transport the glue liquid received by the collection box 130 to the recovery cavity to realize the recovery of the glue liquid. The replenishment pipeline 6 is connected between the recovery container 3 and the glue storage container 2, and this replenishment pipeline 6 communicates the recovery cavity with the glue storage cavity, so as to transport the glue liquid in the recovery cavity to the glue storage cavity to realize glue supply.

[0121] By applying the above solution, the on-line recovery and reuse of the glue liquid can be realized, avoiding the glue liquid dripping onto the machine table of the glue coating mechanism 120 during the glue coating process of the glue coating mechanism 120, polluting the machine table and wasting the glue liquid at the same time; the recovered glue liquid is reused, improving the utilization rate of the glue liquid and reducing the production glue coating cost; the recovery and reuse of the glue liquid are both completed on-line and in real time, without off-line operation, improving the production efficiency.

[0122] A first pressure regulating valve 11 for adjusting the air supply pressure is provided on the third air supply pipeline 9, so as to adjust the pressure of the compressed air entering the glue storage cavity and control it within a set range. By compressing the air in the glue storage cavity and keeping the pressure of the compressed air in the glue storage cavity within the set range, the glue liquid in the glue storage cavity can be continuously pressed into the glue coating mechanism 120 of the glue coating device 1, ensuring that the flow rate of the glue liquid entering the glue coating mechanism 120 remains within a stable range, so that the glue liquid output from the glue coating mechanism 120 can be evenly coated on the product 20 to be processed. Preferably, by compressing the air in the glue storage cavity and keeping the pressure of the compressed air in the glue storage cavity as a fixed value, the glue liquid in the glue storage cavity can be continuously pressed into the glue coating mechanism 120 on the glue coating device 1, ensuring that the flow rate of the glue liquid entering the glue coating mechanism 120 is a fixed value, so that the glue liquid output from the glue coating mechanism 120 can be evenly coated on the product 20 to be processed.

[0123] A second liquid pump 51 is provided on the recovery pipeline 5, and the second liquid pump 51 can pump the glue liquid in the collection box 130 into the recovery container 3. A first liquid pump 61 is provided on the replenishment pipeline 6, and the first liquid pump 61 can pump the glue liquid in the recovery container 3 into the glue storage container 2.

[0124] The glue liquid circulation system further includes a feeding device (not shown in the figure) for supplementing glue liquid or diluent into the recovery chamber, a second liquid level sensor 16 for detecting the liquid level in the recovery chamber, and a viscosity sensor 17 for detecting the viscosity of the glue liquid in the recovery chamber. The second liquid level sensor 16 and the viscosity sensor 17 are respectively communicatively connected to the feeding device. That is to say, when the second liquid level sensor 16 detects that the liquid level in the recovery chamber is low and glue liquid needs to be supplemented, or when the viscosity sensor 17 detects that the viscosity of the glue liquid in the recovery chamber is too high or too low and does not meet the production requirements, the feeding device is used to add diluent or new glue liquid into the recovery chamber. The glue liquid circulation system further includes a stirring device 18 for stirring the medium in the recovery chamber. After adding new glue liquid or diluent into the recovery chamber, the medium in the recovery chamber is evenly mixed by the stirring device 18. It should be noted here that the feeding device is used to supplement glue liquid or diluent into the recovery chamber, rather than directly into the glue storage chamber. The feeding process will not affect the operation of the glue storage chamber, and the glue storage chamber can continuously supply glue to the glue coating mechanism 120, so that the glue coating mechanism 120 can continuously perform glue coating, improving the glue coating efficiency of the glue coating mechanism 120.

[0125] In some embodiments, an anti-foaming device 24 is further provided on the glue inlet pipe 4. The anti-foaming device 24 can be a filter screen provided on the glue inlet pipe 4, or an anti-foaming agent adding mechanism is provided on the glue storage container 2 and / or the recovery container 3 to add anti-foaming agent. The anti-foaming device 24 can remove the bubbles in the glue liquid, thereby improving the uniformity of glue coating.

[0126] In some embodiments, a temperature control device is further provided on the glue storage container 2. The temperature control device includes a temperature control pipe 22 with both the inlet and outlet communicating with the glue storage container 2. A temperature regulator 23 and a liquid pump are provided on the temperature control pipe 22. During operation, the liquid pump pumps the glue liquid in the glue storage container 2 into the temperature regulator 23. After the temperature regulator 23 heats or cools the glue liquid to reach the preset temperature, the liquid pump pumps the glue liquid back into the glue storage container 2. The glue liquid at the preset temperature can maintain the preset viscosity, and thus the glue liquid can be evenly coated on the product 20 to be processed. The temperature control device with the above structure can also be provided on the recovery container 3. The structure of the temperature control device is not limited to the above structure. For example, the glue storage container 2 and / or the recovery container 3 can be directly set as a jacketed or other form of heat exchanger to directly control the temperature of the glue liquid contained therein; or the heat exchange tube of the heat exchanger can be inserted into the glue storage container 2 and / or the recovery container 3 to control the temperature of the glue liquid.

[0127] In some embodiments, a filtering device 25 is further provided on the recovery pipe 5. The filtering device 25 includes a filter screen or other filtering structures. The filtering device 25 can remove the impurities in the recovered glue liquid, improving the quality of the recovered glue liquid.

[0128] It should be noted that the structure of the glue - applying mechanism 120 can be directly referred to the description in Embodiment 1. On the premise of not violating the principle of this embodiment, the structures and technical solutions in Embodiments 1 - 4 can be applied to this embodiment.

[0129] Embodiment 6

[0130] As Figure 14 and Figure 15 shown, different from the foregoing embodiments, in this embodiment, the glue storage container 2 and the recycling container 3 are stacked, preferably, the glue storage container 2 and the recycling container 3 are stacked vertically, and the glue storage container 2 and the recycling container 3 are integrally provided. The glue liquid in the recycling container 3 is pumped into the glue storage container 2 by the first liquid pump 61.

[0131] For other structures and functions of the glue liquid circulation system in this embodiment, reference can be made to Embodiment 3 and Embodiment 4. On the premise of not violating the principle of this embodiment, the structures and technical solutions in Embodiments 1 - 5 can be applied to this embodiment.

[0132] Embodiment 7

[0133] As Figures 3 to 7 shown, the glue - applying device 1 includes a glue - applying mechanism 120 for applying glue liquid to the product 20 to be processed, and a collection box 130 capable of receiving the dripping glue liquid on the glue - applying mechanism 120. The glue - applying mechanism 120 has a glue - applying cavity, and the glue - applying cavity is connected and communicated with the glue - discharging component, and the glue liquid is applied to the product 20 to be processed through the glue - discharging component. The collection box 130 is located below the glue - discharging component, and it can receive the glue liquid dripping from the glue - applying mechanism 120 and the product 20 to be processed.

[0134] As Figure 16 and Figure 17 shown, a glue liquid circulation system includes a glue storage container 2, a recycling container 3, a glue - inlet pipeline 4, a recycling pipeline 5 and a glue - replenishing pipeline 6. Among them, the glue storage container 2 has a glue - storage cavity, the recycling container 3 has a recycling cavity, both the glue storage container 2 and the recycling container 3 are connected to the glue - applying mechanism 120 through the glue - inlet pipeline 4, so that the glue - storage cavity and the recycling cavity are both communicated with the glue - applying cavity of the glue - applying mechanism 120; both the glue storage container 2 and the recycling container 3 are connected to the collection box 130 through the recycling pipeline 5, so that the glue - storage cavity and the recycling cavity are both communicated with the collection box 130; the glue storage container 2 and the recycling container 3 are connected through the glue - replenishing pipeline 6, so that the glue - storage cavity and the recycling cavity are communicated through the glue - replenishing pipeline 6.

[0135] As Figure 16As shown, when a passage is formed between the glue storage cavity and the glue coating cavity, a break is formed between the recycling cavity and the glue coating cavity, that is, the glue can only flow from the glue storage cavity into the glue coating cavity and cannot flow from the recycling cavity into the glue coating cavity; at the same time, a passage is formed between the recycling cavity and the collection box 130, and a break is formed between the glue storage cavity and the collection box 130, that is, the glue can only flow from the collection box 130 into the recycling cavity and cannot flow from the collection box 130 into the glue storage cavity.

[0136] As Figure 17 shown, when a break is formed between the glue storage cavity and the glue coating cavity, a passage is formed between the recycling cavity and the glue coating cavity, that is, the glue cannot flow from the glue storage cavity into the glue coating cavity and can only flow from the recycling cavity into the glue coating cavity; at the same time, a break is formed between the recycling cavity and the collection box 130, and a passage is formed between the glue storage cavity and the collection box 130, that is, the glue cannot flow from the collection box 130 into the recycling cavity and can only flow from the collection box 130 into the glue storage cavity.

[0137] What the above pipeline structure means is that both the glue storage container 2 and the recycling container 3 can be used as glue supply components for supplying glue to the glue coating mechanism 120, and both the glue storage container 2 and the recycling container 3 can be used as recycling components for recycling glue from the collection box 130. When one of the glue storage container 2 and the recycling container 3 is used as a glue supply component, the other is used as a recycling component. Two glue circulation routes are formed in this glue circulation system. When one of the glue circulation routes fails, the other glue circulation route can be used as a replacement in time, which can reduce the risk of the glue coating equipment stopping. The glue storage container 2 is not used as a glue supply component and a recycling component at the same time, and the recycling container 3 is not used as a glue supply component and a recycling component at the same time, avoiding the recycled glue directly entering the glue supply component. The recycled glue enters the recycling component, is processed and then enters the glue supply component, which can improve the quality of glue coating.

[0138] Through the application of the above solution, online recycling and reuse of glue can be realized, avoiding the glue dripping onto the machine table of the glue coating mechanism 120 during the glue coating process of the glue coating mechanism 120, polluting the machine table and wasting glue at the same time; the recycled glue is reused, improving the utilization rate of the glue and reducing the production glue coating cost; the recycling and reuse of the glue are both completed online in real time without offline operation, improving the production efficiency.

[0139] Combined with Embodiment 1, when one of the two glue circulation routes is working, according to the process requirements, this glue circulation route has switchable first working state, second working state and fourth working state; or, this glue circulation route has switchable third working state and fourth working state; or, this glue circulation route has switchable first working state, second working state, third working state and fourth working state. Among them, the first working state, second working state, third working state and fourth working state refer to the descriptions in Embodiment 1.

[0140] Combined with Embodiment 1, the glue liquid circulation system further includes a first power mechanism and a second power mechanism. In different glue liquid circulation routes, the first power mechanism is used to pump or press the glue liquid in the glue storage container 2 into the glue coating chamber or the recovery chamber, and correspondingly, the second power mechanism is used to pump or press the glue liquid in the recovery container 3 into the glue storage chamber or the glue coating chamber. The first power mechanism and the second power mechanism refer to the descriptions in Embodiment 1.

[0141] In some embodiments, the glue liquid state detection element includes a weight sensor 26 for detecting the weight of the glue liquid in the glue supply component. The weight sensor 26 is communicatively connected between the first control valve assembly 7 and the second control valve assembly 8. When the weight sensor 26 detects that the weight of the glue liquid drops below a set weight, the supply of glue to the glue coating mechanism 120 is stopped through the cooperation of the first control valve assembly 7 and the second control valve assembly 8, and the recovery component replenishes the glue liquid to the glue supply component; when the weight sensor 26 detects that the weight of the glue liquid reaches another larger set weight, the replenishment of glue liquid to the glue supply component is stopped through the cooperation of the first control valve assembly 7 and the second control valve assembly 8. Specifically, weight sensors 26 are provided below both the glue storage container 2 and the recovery container 3 and are connected thereto to respectively weigh the glue storage container 2 and the recovery container 3 containing the glue liquid, and by deducting the container weight, the weight of the glue liquid can be indirectly calculated.

[0142] In this embodiment, the glue liquid state detection element includes the above-mentioned weight sensor 26 and further includes a viscosity sensor 17 for detecting the viscosity of the glue liquid in the recovery component. The glue liquid circulation system further includes a feeding device (not shown in the figure) for replenishing glue liquid or diluent into the recovery component. The above-mentioned weight sensor 26 and viscosity sensor 17 are respectively communicatively connected to the feeding device. That is to say, when the weight sensor 26 detects that the weight of the recovery component is relatively low and glue liquid needs to be replenished, or when the viscosity sensor 17 detects that the viscosity of the glue liquid in the recovery component is too high or too low and does not meet the production requirements, the feeding device is used to add diluent or new glue liquid into the recovery component. The glue liquid circulation system further includes a stirring device 18 for stirring the medium in the recovery component. After adding new glue liquid or diluent into the recovery component, the medium in the recovery component is mixed evenly through the stirring device 18. It should be noted here that the feeding device is used to replenish glue liquid or diluent into the recovery component, rather than directly replenishing glue liquid or diluent into the glue supply component. During the feeding process, the operation of the glue supply component is not affected, and the glue supply component can continuously supply glue to the glue coating mechanism 120, so that the glue coating mechanism 120 can continuously perform glue coating, improving the glue coating efficiency of the glue coating mechanism 120.

[0143] In some embodiments, such as Figure 16As shown, the glue inlet pipe 4 includes a first glue inlet branch pipe 43, a second glue inlet branch pipe 44, and a glue inlet main pipe 45. The first glue inlet branch pipe 43, the second glue inlet branch pipe 44, and the glue inlet main pipe 45 are connected and communicated through a first three-way valve 42. When the first three-way valve 42 is in the first working position, the first glue inlet branch pipe 43 and the glue inlet main pipe 45 are communicated, so that a passage is formed between the glue storage cavity and the glue application cavity, and a break is formed between the recovery cavity and the glue application cavity; when the first three-way valve 42 is in the second working position, the second glue inlet branch pipe 44 and the glue inlet main pipe 45 are communicated, so that a break is formed between the glue storage cavity and the glue application cavity, and a passage is formed between the recovery cavity and the glue application cavity; when the first three-way valve 42 is in the third working position, a break is formed between the glue storage cavity and the glue application cavity, and a break is formed between the recovery cavity and the glue application cavity. Of course, the glue inlet main pipe can be not provided, the glue storage cavity is directly communicated with the glue application cavity through the first glue inlet branch pipe 43, and a valve is provided on the first glue inlet branch pipe 43 to control the on-off. The recovery cavity is directly communicated with the glue application cavity through the second glue inlet branch pipe 44, and a valve is provided on the second glue inlet branch pipe 44 to control the on-off.

[0144] In some embodiments, as Figure 17 shown, the recovery pipe 5 includes a first recovery branch pipe 53, a second recovery branch pipe 54, and a recovery main pipe 55. The first recovery branch pipe 53, the second recovery branch pipe 54, and the recovery main pipe 55 are connected and communicated through a second three-way valve 52. When the second three-way valve 52 is in the first working position, the first recovery branch pipe 53 and the recovery main pipe 55 are communicated, so that a passage is formed between the collection box 130 and the glue storage cavity, and a break is formed between the collection box 130 and the recovery cavity; when the second three-way valve 52 is in the second working position, the second recovery branch pipe 54 and the recovery main pipe 55 are communicated, so that a break is formed between the collection box 130 and the glue storage cavity, and a passage is formed between the collection box 130 and the recovery cavity; when the second three-way valve 52 is in the third working position, a break is formed between the collection box 130 and the glue storage cavity, and a break is formed between the collection box 130 and the recovery cavity. A second liquid pump 51 is provided on the recovery main pipe 55 to provide power for the flow of the glue liquid in the recovery pipe 5. Of course, the recovery main pipe 55 can be not provided, the collection box 130 is directly communicated with the glue storage cavity through the first recovery branch pipe 53, and a valve is provided on the first recovery branch pipe 53 to control the on-off. The collection box 130 is directly communicated with the recovery cavity through the second recovery branch pipe 54, and a valve is provided on the second recovery branch pipe 54 to control the on-off.

[0145] Example 8

[0146] A glue application device, the main improvement point of which lies in the glue liquid circulation system, and the glue liquid circulation system adopts the technical solution formed by any one of the embodiments 1 to 7 or the appropriate combination of any two or more embodiments.

[0147] The above embodiments are only used to illustrate the technical concept and features of the present utility model. The purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A glue circulation system for a glue coating device, the glue coating device comprising a glue coating mechanism for coating glue on a product to be processed, and a collecting box capable of receiving glue dripping from the glue coating mechanism, the glue coating mechanism having a glue coating cavity, characterized in that: The glue circulation system comprises: A glue storage container having a glue storage cavity; a recovery container having a recovery chamber; A glue inlet pipeline, the glue inlet pipeline connecting the glue storage chamber and the glue coating chamber; A recovery pipe, the recovery pipe connecting the collection box and the recovery chamber; A glue replenishing pipeline is connected with the recovery chamber and the glue storage chamber.

2. The glue circulation system according to claim 1, characterized in that: The glue liquid circulation system further includes a first power mechanism, which is connected to the glue storage cavity and is used to inject a gas medium into the glue storage cavity, so that the glue liquid in the glue storage cavity flows from the glue storage cavity to the glue coating cavity under the pressure of the gas medium; The glue liquid circulation system also includes a second power mechanism, which is connected to the recovery chamber and is used to inject a gas medium into the recovery chamber so that the glue liquid in the recovery chamber flows from the recovery chamber to the glue storage chamber under the pressure of the gas medium.

3. The glue circulation system according to claim 2, characterized in that: The first power mechanism includes a third air supply pipeline connected to the rubber storage chamber and used to inject gaseous medium into the rubber storage chamber, a third control valve provided on the third air supply pipeline and used to control the opening and closing of the third air supply pipeline, and an air source; And / or, the second power mechanism is connected to the recovery chamber and is used for a fourth air supply pipeline for injecting gaseous medium into the recovery chamber, a fourth control valve arranged on the fourth air supply pipeline and used for controlling the opening and closing of the fourth air supply pipeline, and an air source.

4. The glue circulation system according to claim 3, characterized in that: The third control valve and the fourth control valve are both solenoid valves, each having an air inlet and an air outlet, and each having a switchable first position and a second position. When the solenoid valve is in the first position, the air inlet is connected to the air outlet; when the solenoid valve is in the second position, the air inlet and the air outlet are not connected to each other. And / or, the third gas supply pipeline is provided with a first pressure regulating valve for adjusting the gas supply pressure; And / or, the fourth gas supply pipeline is provided with a second pressure regulating valve for adjusting the gas supply pressure.

5. The glue circulation system according to claim 1, characterized in that: The glue liquid circulation system further comprises a third power mechanism, which is a vacuum pumping mechanism, and the vacuum pumping mechanism is configured to vacuum the recovery chamber so as to suck the glue liquid in the collection box into the recovery chamber under negative pressure; Alternatively, the third power mechanism is a liquid pump, and the liquid pump is arranged on the recovery pipeline to pump the glue liquid in the collection box into the recovery chamber through the recovery pipeline.

6. The glue circulation system according to claim 1, characterized in that: One of the glue storage container and the recovery container serves as a glue supply component for supplying glue to the glue coating mechanism, and the other serves as a recovery component for recovering glue from the collection box, wherein: The glue storage container and the recovery container are both connected to the glue coating mechanism through the glue feeding pipe, so that the glue storage cavity and the recovery cavity are both connected to the glue coating cavity; the glue storage container and the recovery container are both connected to the collection box through the recovery pipe, so that the glue storage cavity and the recovery cavity are both connected to the collection box; the glue storage container and the recovery container are connected through the glue replenishing pipe, so that the glue storage cavity and the recovery cavity are connected through the glue replenishing pipe. When a passage is formed between the glue storage chamber and the glue coating chamber, a circuit is formed between the recovery chamber and the glue coating chamber, and a passage is formed between the recovery chamber and the collection box, the glue storage container serves as the glue supply component and the recovery container serves as the recovery component; When a short circuit is formed between the glue storage chamber and the glue coating chamber, a passage is formed between the recovery chamber and the glue coating chamber, and a short circuit is formed between the recovery chamber and the collection box, a passage is formed between the glue storage chamber and the collection box, and the glue storage container serves as the recovery component and the recovery container serves as the glue supply component.

7. The glue circulation system according to any one of claims 1 to 6, characterized in that: The glue circulation system also includes: A first valve, wherein the first valve is disposed on the glue supply pipeline, wherein the recovery chamber and the glue storage chamber are connected to each other when the first valve is in an open state, and the recovery chamber and the glue storage chamber are not connected to each other when the first valve is in a closed state; a second valve, the second valve being arranged on the recovery pipe, the recovery chamber being connected to the collection box when the second valve is in an open state, and the recovery chamber being disconnected from the collection box when the second valve is in a closed state; The glue circulation system has a first working state and a second working state. When the glue circulation system is in the first working state, the first valve is in a closed state and the second valve is in an open state, and a first medium passage for applying glue and recovering glue is formed between the glue storage chamber, the glue inlet pipe, the glue coating chamber, the collecting box, the recovery pipe and the recovery chamber; when the glue circulation system is in the second working state, the first valve is in an open state and the second valve is in a closed state, and a second medium passage for replenishing glue to the glue storage chamber is formed between the recovery chamber, the glue replenishment pipe and the glue storage chamber; or, The glue liquid circulation system has a third working state and a fourth working state. When the glue liquid circulation system is in the third working state, the first valve and the second valve are both in an open state, and a first medium passage for applying glue and recovering glue is formed between the glue storage chamber, the glue inlet pipe, the glue coating chamber, the collecting box, the recovery pipe and the recovery chamber. A second medium passage for replenishing glue to the glue storage chamber is formed between the recovery chamber, the glue replenishment pipe and the glue storage chamber; when the glue liquid circulation system is in the fourth working state, the first valve and the second valve are both in a closed state, and the first medium passage and the second medium passage are both blocked.

8. The glue circulation system according to claim 7, characterized in that: The first valve is a first air-controlled valve, the glue liquid circulation system further comprises a first air supply pipeline and a first control valve, the first air supply pipeline is connected to the first air-controlled valve and is used to introduce gas medium into the first air-controlled valve, the first control valve is arranged on the first air supply pipeline and is used to control the opening and closing of the first air supply pipeline; and / or, The second valve is a second air-controlled valve, and the glue liquid circulation system also includes a second air supply pipeline and a second control valve. The second air supply pipeline is connected to the second air-controlled valve and is used to introduce gas medium into the second air-controlled valve. The second control valve is arranged on the second air supply pipeline and is used to control the opening and closing of the second air supply pipeline.

9. The glue circulation system according to claim 7, characterized in that: The glue circulation system also includes: A first liquid level sensor for detecting the liquid level in the glue storage chamber, wherein the first liquid level sensor is in communication connection with the first valve and the second valve; and / or, The glue liquid circulation system also includes a feeding device for replenishing glue liquid or diluent into the recovery chamber and a glue liquid state detection element, the glue liquid state detection element is communicatively connected with the feeding device, and the glue liquid state detection element includes at least one of a second liquid level sensor for detecting the liquid level in the recovery chamber, a viscosity sensor for detecting the viscosity of the glue liquid in the recovery chamber, and a weight sensor for detecting the weight of the liquid in the recovery chamber; and / or, a stirring device for stirring the medium in the recovery chamber; and / or, a first liquid pump disposed on the glue replenishing pipeline, the first liquid pump being configured to pump the glue liquid in the recovery container into the glue storage container, the first valve being independently disposed or integrated in the first liquid pump; and / or, a second liquid pump disposed on the recovery pipeline, the second liquid pump being configured to pump the glue liquid in the collection box into the recovery container, the second valve being independently disposed or integrated in the second liquid pump; and / or, A third liquid pump is provided on the glue feeding pipeline, and the third liquid pump is configured to pump the glue liquid in the glue storage container into the glue coating mechanism.

10. A glue coating device, characterized in that: A glue circulation system comprising any one of claims 1 to 9.

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