Glue supply system and glue supply method

Abstract

The present invention discloses a glue supply system and glue supply method, wherein the glue supply system includes a primary glue supply device, a secondary glue supply device, and a spray valve. The secondary glue supply device is connected between the primary glue supply device and the spray valve. The distance between the spray valve and the secondary glue supply device is much smaller than the distance between the primary glue supply device and the secondary glue supply device, and the secondary glue supply device can move synchronously with the spray valve to keep the distance between the two constant. The secondary glue supply device includes a first syringe assembly, and the first syringe assembly includes a first syringe, a first valve, a second valve, and a first solenoid valve. The present invention has a glue supply path section through a near-point syringe-type secondary glue supply mode. The distance between the secondary glue supply device and the spray valve is small and constant, and the pressure loss and fluctuation are small, thereby improving the glue supply stability and glue coating quality.

Description

Technical Field

[0001] The present invention relates to an automated device used in the production process of electronic products, and in particular to a glue supply system and a glue supply method. Background Art

[0002] With the development of science and technology, various display screens are increasingly used in many aspects of people's work and life. In the production process of display screens, in order to protect the circuits from oxidation and corrosion, a layer of glue needs to be applied on the surface of the circuits to isolate the air and protect the circuits. Figure 1 , Figure 1 Figure 1 is a schematic diagram of the existing glue supply system. Figure 1 As shown, the existing glue supply system includes a glue supply device 10', a hose 20', and a valve body 30'. The hose 20' connects the glue supply device 10' and the valve body 30'. The glue supplied by the glue supply device 10' flows through the hose 20', passes through a tank chain 40', and then flows out of the valve body 30' for glue supply. Due to the excessive length of the hose 20' and the bend in the tank chain 40', the existing glue supply system suffers from unstable glue supply, resulting in spraying anomalies, unstable product quality, and low product yield. Summary of the Invention

[0003] The object of the present invention is to provide a glue supply system and a glue supply method to solve the above problems.

[0004] To achieve the above objectives, the present invention provides a glue supply system comprising a primary glue supply device, a secondary glue supply device, and a spray valve. The secondary glue supply device is connected between the primary glue supply device and the spray valve, with the distance between the spray valve and the secondary glue supply device being much smaller than the distance between the primary and secondary glue supply devices. The secondary glue supply device is capable of synchronous movement with the spray valve, maintaining a constant distance between the secondary glue supply device and the spray valve. The secondary glue supply device comprises a first syringe assembly, which includes a first syringe, a first valve, a second valve, and a first solenoid valve. The first syringe is used to accommodate the colloid, and the first syringe has a first end and a second end opposite to each other; a first valve is connected to the primary glue supply device and the first end of the first syringe; a second valve is connected to the spray valve and the first end of the first syringe; a first solenoid valve is connected to the second end of the first syringe; when the secondary glue supply device supplies glue, the first valve is closed, the primary glue supply device does not supply glue to the first syringe, the first solenoid valve is in an open state and provides positive pressure to the first syringe from the second end, and the second valve is opened, so that the colloid in the first syringe flows out from the first end through the second valve and the spray valve.

[0005] As an optional technical solution, the one-time glue supply device includes a glue storage barrel unit. When the first valve is opened, the one-time glue supply device provides positive pressure to the glue storage barrel unit so that the glue storage barrel unit discharges glue and provides it to the first syringe through the hose and the first valve.

[0006] As an optional technical solution, the one-time glue supply device also includes a weighing unit and an alarm unit. The weighing unit is electrically connected to the alarm unit. The glue storage barrel unit is placed on the weighing unit. A reserved weight is set in the weighing unit. The weighing unit is used to continuously detect the actual weight of the glue storage barrel unit. If the actual weight is less than the reserved weight, the alarm unit will alarm.

[0007] As an optional technical solution, the first syringe assembly also includes a first lower liquid level sensor, which is arranged adjacent to the first end of the first syringe. The secondary glue supply device also includes a second syringe assembly arranged in parallel with the first syringe assembly, and the second syringe assembly includes a second syringe, a third valve, a fourth valve and a second solenoid valve. The second syringe is used to accommodate glue and has opposing third and fourth ends. A third valve is connected to the primary glue supply device and the third end of the second syringe. A fourth valve is connected to the spray valve and the third end of the second syringe. A second solenoid valve is connected to the fourth end of the second syringe. When the first syringe assembly is supplying glue, the first lower liquid level sensor continuously detects the glue in the first syringe. If the first lower liquid level sensor detects no glue in the first syringe, the second valve is closed to stop glue supply. The first valve is opened, and the first solenoid valve is closed and in an exhaust state so that the primary glue supply device can supply glue to the first syringe. The third valve is closed, and the primary glue supply device does not supply glue to the second syringe. The second solenoid valve is opened and provides positive pressure to the second syringe from the fourth end. The fourth valve is opened to allow the glue in the second syringe to flow out from the third end through the fourth valve and the spray valve.

[0008] As an optional technical solution, the first syringe assembly also includes a first upper liquid level sensor, which is arranged adjacent to the second end of the first syringe; when the primary glue supply device supplies glue to the first syringe, the first upper liquid level sensor continuously detects the colloid in the first syringe. If the first upper liquid level sensor detects the colloid in the first syringe, the first valve is closed and the primary glue supply device stops supplying glue; the first solenoid valve is changed to an open state and provides positive pressure to the first syringe from the second end, while the second valve remains closed, so that the first syringe assembly enters a ready state.

[0009] As an optional technical solution, the second syringe assembly also includes a second lower liquid level sensor, which is arranged adjacent to the third end of the second syringe. The second lower liquid level sensor is used to continuously detect the colloid in the second syringe when the second syringe assembly is supplying glue. If the second lower liquid level sensor cannot detect the colloid in the second syringe, the fourth valve is closed to stop supplying glue, the third valve is opened, and the second solenoid valve is closed and is in an exhaust state so that the one-time glue supply device can supply glue to the second syringe; and the first valve is in a closed state, the one-time glue supply device does not supply glue to the first syringe, the first solenoid valve is in an open state and provides positive pressure to the first syringe from the second end, and the second valve is opened so that the colloid in the first syringe flows out through the second valve and the spray valve from the first end.

[0010] As an optional technical solution, the second syringe assembly also includes a second upper liquid level sensor, which is arranged adjacent to the fourth end of the second syringe; when the primary glue supply device supplies glue to the second syringe, the second upper liquid level sensor continuously detects the colloid in the second syringe. If the second upper liquid level sensor detects the colloid in the second syringe, the third valve is closed and the primary glue supply device stops supplying glue; the second solenoid valve is changed to an open state and provides positive pressure to the second syringe from the fourth end, while the fourth valve remains closed, so that the second syringe assembly enters a ready state.

[0011] As an optional technical solution, the glue supply system also includes a first three-way valve, a second three-way valve and a third three-way valve. The first three-way valve is connected to the first valve, the second valve and the first syringe; the second three-way valve is connected to the third valve, the fourth valve and the second syringe; and the third three-way valve is connected to the second valve, the fourth valve and the spray valve.

[0012] As an optional technical solution, the first syringe assembly further includes a first lower liquid level amplifier, which is electrically connected to the first lower liquid level sensor to amplify the signal sensed by the first lower liquid level sensor.

[0013] In addition, the present invention also provides a glue supply method, which comprises:

[0014] A glue supply system is provided, comprising a primary glue supply device, a secondary glue supply device, and a spray valve. The secondary glue supply device is connected between the primary glue supply device and the spray valve, and the distance between the spray valve and the secondary glue supply device is much smaller than the distance between the primary glue supply device and the secondary glue supply device. The secondary glue supply device can move synchronously with the spray valve, so that the distance between the secondary glue supply device and the spray valve is constant. The secondary glue supply device includes a first syringe assembly, the first syringe assembly including a first syringe, a first valve, a second valve, and a first solenoid valve. The first syringe is used to accommodate glue and has a first end and a second end opposite to each other. The first valve is connected to the primary glue supply device and the first end of the first syringe. The second valve is connected to the spray valve and the first end of the first syringe. The first solenoid valve is connected to the second end of the first syringe.

[0015] When the first valve is closed, the one-time glue supply device does not supply glue to the first syringe; when the first solenoid valve is in an open state and provides positive pressure to the first syringe from the second end, the second valve is opened, so that the glue in the first syringe flows out from the first end through the second valve and the spray valve.

[0016] The glue supply system and glue supply method of the present invention include a secondary glue supply device, which has a first syringe assembly. Through a near-point syringe-type secondary glue supply mode, it has a glue supply path section, has low pressure loss, and improves the stability of glue supply. Furthermore, the secondary glue supply device can be provided with a first syringe assembly and a second syringe assembly in parallel. When the amount of glue in the first syringe assembly is insufficient, the second syringe assembly is switched to supply glue to the outside. In this way, the glue supply system does not need to stop operating during the process of adding and changing glue in the secondary glue supply device, thereby improving production efficiency.

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of an existing glue supply system;

[0019] Figure 2 is a schematic diagram of the glue supply system of the present invention;

[0020] Figure 3 A schematic diagram of a secondary glue supply device and a spray valve in the glue supply system of the present invention;

[0021] Figure 4 Schematic diagram of a primary glue supply device in the glue supply system of the present invention;

[0022] Figure 5 Flowchart of the glue supply method of the present invention. DETAILED DESCRIPTION

[0023] In order to provide a further understanding of the purpose, structure, features and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0024] Please refer to Figures 2 to 4 , Figure 2 is a schematic diagram of the glue supply system of the present invention, Figure 3 This is a schematic diagram of the secondary glue supply device and the spray valve in the glue supply system of the present invention. Figure 4 Schematic diagram of the primary glue supply device in the glue supply system of the present invention. The glue supply system 1 of the present invention comprises a primary glue supply device 10, a secondary glue supply device 20 and a spray valve 30. The secondary glue supply device 20 is connected to the primary glue supply device 10 via a hose 40, and the secondary glue supply device 20 is connected between the primary glue supply device 10 and the spray valve 30. Figure 2 As shown, in the present invention, the distance between the spray valve 30 and the secondary glue supply device 20 is much smaller than the distance between the primary glue supply device 10 and the secondary glue supply device 20. Thus, since there is sufficient distance between the primary glue supply device 10 and the secondary glue supply device 20, the wiring and connection between the primary glue supply device 10 and the secondary glue supply device 20 can be set up and connected. At the same time, the distance between the secondary glue supply device 20 and the spray valve 30 is relatively small, generally less than 1 meter. During use, the secondary glue supply device 20 can move synchronously with the spray valve 30, ensuring a constant distance between the secondary glue supply device 20 and the spray valve 30. This small and constant glue supply distance greatly reduces pressure loss and fluctuations during the glue supply process, improves glue supply stability, and thus enhances spraying quality. In one embodiment, the distance between the primary glue supply device 10 and the secondary glue supply device 20 is at least four times the distance between the secondary glue supply device 20 and the spray valve 30. For example, the distance between the secondary glue supply device 20 and the spray valve 30 is less than 1 meter, and the distance between the primary glue supply device 10 and the secondary glue supply device 20 is ≥4 meters.

[0025] like Figure 3 As shown, the secondary glue supply device 20 includes a first syringe assembly 100. The first syringe assembly includes a first syringe 110, a first valve 120, a second valve 130, and a first solenoid valve 140. The first syringe 110 is used to accommodate the glue and has a first end 111 and a second end 112 opposite to each other. The first valve 120 is connected to the primary glue supply device 10 and the first end 111 of the first syringe 110. The second valve 130 is connected to the spray valve 30 and the first end 111 of the first syringe 110. The first solenoid valve 140 is connected to the second end 112 of the first syringe 110.

[0026] In one embodiment, when the secondary glue supply device 20 supplies glue, the first valve 120 is closed. At this time, the primary glue supply device 10 does not supply glue to the first syringe 110. The first solenoid valve 140 is in an open state and provides positive pressure to the first syringe 110 from the second end 112 of the first syringe 112. The second valve 130 is opened to allow the glue in the first syringe 110 to flow out from the first end 111 through the second valve 130 and the spray valve 30, so as to perform subsequent glue dispensing operations on electronic products (such as but not limited to display screens, etc.).

[0027] In one embodiment, the first valve 120 and the second valve 130 are liquid medicine valves. When the first solenoid valve 140 is in the open state, CDA (Clean Dry Air) positive pressure is applied to the first syringe 110. Furthermore, a CDA positive pressure air source can be provided by a precision proportional valve. Compared to the prior art method of controlling glue dispensing through, for example, a cylinder, the present invention can more precisely control the pressure applied to the first syringe 110. The second valve 130 for glue dispensing is opened to press the glue in the first syringe 110 out. By improving the stability and precision of the glue supply pressure, the glue dispensing effect of the first syringe assembly 100 and the subsequent glue coating quality are improved.

[0028] In one embodiment, due to the long distance between the primary glue supply device 10 and the secondary glue supply device 20, the glue supply system 1 further includes a tank chain 50. The primary glue supply device 10 delivers glue to a hose 40, which is then guided by the tank chain 50 and connected to the secondary glue supply device 20. In actual operation, a hose (not shown) also connects the secondary glue supply device 20 to the spray valve 30. This hose does not pass through the tank chain and is much shorter than the hose 40. For example, the hose between the secondary glue supply device 20 and the spray valve 30 is less than 1 meter long, while the hose 40 between the primary glue supply device 10 and the secondary glue supply device 20 is at least 4 meters long.

[0029] The glue supply system 1 of the present invention is provided with a primary glue supply device 10, a secondary glue supply device 20, and a spray valve 30. The distance between the secondary glue supply device 20 and the spray valve 30 is much smaller than that between the primary glue supply device 10 and the secondary glue supply device 20. The secondary glue supply device 20 can move synchronously with the spray valve 30, so that the distance between the secondary glue supply device 20 and the spray valve 30 is constant. In this way, after the primary glue supply device 10 supplies glue to the secondary glue supply device 20, the secondary glue supply device 20 is essentially a syringe-type near-point secondary glue supply device. The secondary glue supply device 20 has a short and constant glue supply path, with minimal pressure loss and fluctuation, thereby improving glue supply stability.

[0030] like Figure 3As shown, the primary glue supply device 10 includes a glue storage barrel unit 11. When the first valve 120 of the first syringe assembly 100 is opened, the primary glue supply device 10 provides positive pressure to the glue storage barrel unit 11 so that the glue storage barrel unit 11 discharges glue and is supplied to the first syringe 110 via the hose 30 and the first valve 120. In this way, in this embodiment, the primary glue supply device 10 is for glue storage barrel glue supply, and the secondary glue supply device 20 is for near-point syringe glue supply. In one embodiment, the glue storage barrel unit 11 includes a cavity, a glue storage barrel and a glue supply hose. The glue storage barrel is located in the cavity, and the glue supply hose is partially located in the glue storage barrel. The primary glue supply device 10 uses CDA (Clean Dry Air) positive pressure cavity to provide pressure so that glue is discharged from the glue storage barrel through the glue supply hose.

[0031] In one embodiment, the one-time glue supply device 10 further includes a weighing unit 12 and an alarm unit 13. The weighing unit 12 is electrically connected to the alarm unit 13. The glue barrel unit 11 is placed on the weighing unit 12. A reserved weight is set in the weighing unit 12. Generally, the reserved weight can be a warning weight. If the weight of the glue barrel unit 11 is lower than this reserved weight, the glue supply hose may no longer be able to provide glue to the outside. The weighing unit 12 is used to continuously detect the actual weight of the glue barrel unit 11. If the actual weight is less than the reserved weight, it means that the actual weight of the glue barrel unit 11 is lower than the warning weight, and the alarm unit 13 will alarm. The staff can add glue to the glue barrel unit 11 based on this alarm information. In one embodiment, the weighing unit 12 is a high-precision electronic scale.

[0032] like Figure 2 As shown, in one embodiment, the first syringe assembly 100 further includes a first lower liquid level sensor 150, which is disposed adjacent to the first end 111 of the first syringe 110. The secondary glue supply device 20 further includes a second syringe assembly 200 disposed in parallel with the first syringe assembly 100. The second syringe assembly 200 includes a second syringe 210, a third valve 220, a fourth valve 230, and a second solenoid valve 240. The second syringe 210 is used to accommodate the glue and has opposing third and fourth ends 211 and 212. The third valve 220 is connected to the primary glue supply device 10 and the third end 211 of the second syringe 210. The fourth valve 230 is connected to the spray valve 30 and the third end 211 of the second syringe 210. The second solenoid valve 240 is connected to the fourth end 212 of the second syringe 210.

[0033] When the first syringe assembly 100 is supplying glue, the first lower liquid level sensor 150 continuously detects the glue in the first syringe 110. If the first lower liquid level sensor 150 no longer detects glue in the first syringe 110, the second valve 130 closes to stop supplying glue to the spray valve 30. The first valve 120 opens to receive glue from the primary glue supply device 10. The first solenoid valve 140 closes and is in an exhaust state, allowing the primary glue supply device 10 to supply glue to the first syringe 110 via a pressure differential (the pressure difference in the channel between the first valve 120 and the first solenoid valve 140). The third valve 220 is closed, preventing the primary glue supply device 10 from supplying glue to the second syringe 210. The second solenoid valve 240 is open, applying positive pressure to the second syringe 210 from the fourth end 212. The fourth valve 230 opens, allowing the glue in the second syringe 210 to flow out from the third end 211 through the fourth valve 230 and the spray valve 30.

[0034] In one embodiment, the third valve 220 and the fourth valve 230 are liquid medicine valves. When the second solenoid valve 240 is in the open state, CDA (Clean Dry Air) positive pressure is applied to the second syringe 210. Furthermore, a CDA positive pressure air source can be provided by a precision proportional valve. Compared to conventional methods of controlling glue dispensing through, for example, a cylinder, the present invention can more precisely control the pressure applied to the second syringe 210. The fourth valve 230 for glue dispensing is opened to press the glue out of the second syringe 210. This improves the glue dispensing effect of the second syringe assembly 200 and the subsequent glue coating quality by enhancing the stability and precision of the glue supply pressure.

[0035] In one embodiment, when the first lower liquid level sensor 150 detects no colloid in the first syringe 110, a first residual amount of colloid may remain in the first syringe 110. This first residual amount of colloid can be considered a buffer. This first residual amount of colloid can, for example, allow the first syringe assembly 100 to dispense glue for approximately 20 minutes. This allows the first syringe assembly 100 to dispense glue until the currently applied product is finished, allowing the syringe assembly to be switched, facilitating actual production.

[0036] In one embodiment, if the actual weight of the glue storage barrel unit 11 falls below the warning weight, and the glue in the first syringe assembly 100 and / or the second syringe assembly 200 falls below the level detectable by the lower liquid level sensor, the first syringe assembly 100 and / or the second syringe assembly 200 can continue to dispense glue for approximately 20 minutes, which is sufficient time for the primary glue supply device 10 to complete its own glue replenishment. Thus, the primary glue supply device 10 does not need to be shut down during the glue replenishment and replacement process.

[0037] In this embodiment, the secondary glue supply device 20 is equipped with a first syringe assembly 100 and a second syringe assembly 200 in parallel. When the amount of glue in the first syringe assembly 100 is insufficient, the second syringe assembly 200 switches to supplying glue. This allows the glue supply system 1 to operate without stopping during the glue replenishment and replacement process of the secondary glue supply device 20, thereby improving production efficiency. In addition, the use of an automatically switched, near-point syringe-type glue supply system provides a high degree of automation throughout the entire process, thereby improving the spraying yield of the spray valve 30.

[0038] like Figure 2 As shown, the first syringe assembly 100 further includes a first upper liquid level sensor 160, which is disposed adjacent to the second end 112 of the first syringe 110. In one embodiment, the position of the first upper liquid level sensor 160 can be set according to a safety upper liquid level value. When the primary glue supply device 10 supplies glue to the first syringe 110, the first upper liquid level sensor 160 continuously detects the glue in the first syringe 110. If the first upper liquid level sensor 160 detects glue in the first syringe 110, indicating that the glue in the first syringe 110 has reached the safety upper liquid level value, the first valve 120 is closed, and the primary glue supply device 10 stops supplying glue. The first solenoid valve 140 is then opened and provides positive pressure to the first syringe 110 from the second end 112. At the same time, the second valve 130 remains closed, so that the first syringe assembly 100 enters a standby state. This process is usually carried out simultaneously with the second syringe assembly 200 discharging glue. In other words, when the second syringe assembly 200 is discharging glue (i.e., in the current glue supplying state (active status)), the first syringe assembly 100 replenishes glue. After the glue replenishing is completed, it enters the standby state so that when the glue in the second syringe assembly 200 is insufficient, it can be switched to the first syringe assembly 100 to supply glue outward.

[0039] In one embodiment, if Figure 2As shown, the second syringe assembly 200 further includes a second lower liquid level sensor 250, which is disposed adjacent to the third end 211 of the second syringe 210. The second lower liquid level sensor 250 is configured to continuously detect the colloid in the second syringe 210 while the second syringe assembly 200 is supplying glue. If the second lower liquid level sensor 250 fails to detect the colloid in the second syringe 210, the fourth valve 230 is closed to stop supplying glue, the third valve 220 is opened, and the second solenoid valve 240 is closed and in an exhaust state to allow the second syringe assembly 200 to supply glue. The primary glue supply device 10 supplies glue to the second syringe 210 through a pressure difference (the pressure difference in the channel between the third valve 220 and the second solenoid valve 240); and the first valve 120 is in a closed state, the primary glue supply device 10 does not supply glue to the first syringe 110, the first solenoid valve 140 is in an open state and provides positive pressure to the first syringe 110 from the second end 112, and the second valve 130 is opened, so that the glue in the first syringe 110 flows out from the first end 111 through the second valve 130 and the spray valve 30.

[0040] In one embodiment, when the second lower liquid level sensor 250 detects no colloid in the second syringe 210, a second colloid residual level may be present in the second syringe 210. The first colloid residual level can be considered a buffer level. The second colloid residual level can, for example, allow the second syringe assembly 200 to dispense glue for approximately 20 minutes. This allows the second syringe assembly 200 to dispense glue until the currently applied product is finished, allowing for easy switching of syringe assemblies, facilitating production.

[0041] In this embodiment, the secondary glue supply device 20 is provided with a first syringe assembly 100 and a second syringe assembly 200 in parallel, and the first syringe assembly 100 and the second syringe assembly 200 can be a series structure. When the amount of colloid in the first syringe assembly 100 is insufficient, the second syringe assembly 200 is switched to supply glue to the outside, and the first syringe assembly 100 is replenished with glue at the same time. When the amount of colloid in the second syringe assembly 200 is insufficient, the first syringe assembly 100 is switched to supply glue to the outside, and the second syringe assembly 200 is replenished with glue at the same time. By switching between the first syringe assembly 100 and the second syringe assembly 200, one of them serves as the current glue supply assembly, and the other serves as a backup glue supply assembly after replenishing glue. During the process of adding and changing glue in the secondary glue supply device 20, the glue supply system 1 does not need to stop operation, thereby improving production efficiency.

[0042] In one embodiment, if Figure 2As shown, the second syringe assembly 200 further includes a second upper liquid level sensor 260, which is disposed adjacent to the fourth end 212 of the second syringe 210. In one embodiment, the position of the second upper liquid level sensor 260 can be set based on a safety upper liquid level value. While the primary glue supply device 10 supplies glue to the second syringe 210, the second upper liquid level sensor 260 continuously detects the glue in the second syringe 210. If the second upper liquid level sensor 260 detects glue in the second syringe 210, indicating that the glue in the second syringe 210 has reached the safety upper liquid level value, the third valve 220 is closed, and the primary glue supply device 10 stops supplying glue. The second solenoid valve 240 is then opened and provides positive pressure to the second syringe 210 from the fourth end 212. Meanwhile, the fourth valve 230 remains closed, causing the second syringe assembly 200 to enter a standby state. This process is usually carried out simultaneously with the first syringe assembly 100 supplying glue. In other words, when the first syringe assembly 100 is supplying glue, the second syringe assembly 200 is replenishing glue. After the replenishment is completed, it enters the ready state so that when the glue in the first syringe assembly 100 is insufficient, it can be switched to the second syringe assembly 200 to supply glue outward.

[0043] In one embodiment, the first and second syringes 110 and 210 are made of UV-resistant, corrosion-resistant, and chemically resistant plastic, ensuring the stability of the colloid within them. The volumes of the first and second syringes 110 and 210 range, for example, from 30 to 100 ml. This allows the secondary glue supply device 20 to be compact and lightweight, facilitating its close proximity to the spray valve 30. In one embodiment, the secondary glue supply device 20 can be mounted directly above the spray valve 30, maintaining a constant distance of less than 1 meter between them. This allows for close-point glue supply, minimizes pressure loss associated with long-distance glue supply, and improves glue supply stability.

[0044] In one embodiment, the first syringe assembly 100 further includes a first syringe adapter 180, and the second syringe assembly 200 further includes a second syringe adapter 280. The first solenoid valve 140 is connected to the first syringe 110 through the first syringe adapter 180; the second solenoid valve 240 is connected to the second syringe 210 through the second syringe adapter 280.

[0045] In one embodiment, the glue supply system 1 further includes a first three-way valve 170, a second three-way valve 270, and a third three-way valve 21. The first three-way valve 170 connects the first valve 120, the second valve 130, and the first syringe 110 to achieve communication between the first valve 120 and the first syringe 110, and between the second valve 130 and the first syringe 110. The second three-way valve connects the third valve 220, the fourth valve 230, and the second syringe 210 to achieve communication between the third valve 220 and the second syringe 210, and between the fourth valve 230 and the second syringe 210. The third three-way valve 21 connects the second valve 130, the fourth valve 230, and the spray valve 30 to achieve communication between the second valve 130 and the spray valve 30, and between the fourth valve 230 and the spray valve 30. The first syringe assembly 100 and the second syringe assembly 200 are connected in series via the third three-way valve 21.

[0046] In one embodiment, if Figure 2 As shown, the first syringe assembly 100 further includes a first lower liquid level amplifier 151, which is electrically connected to the first lower liquid level sensor 150 to amplify the signal sensed by the first lower liquid level sensor 150, so that the glue in the first syringe 110 can be detected promptly and accurately when the first syringe assembly 100 is supplying glue, and it can be determined whether the syringe assembly needs to be switched. The first syringe assembly 100 further includes a first upper liquid level amplifier 161, which is electrically connected to the first upper liquid level sensor 160 to amplify the signal sensed by the first upper liquid level sensor 160, so that the glue in the first syringe 110 can be detected promptly and accurately when the first syringe assembly 100 is replenishing glue, and it can be determined whether the glue replenishment needs to be stopped.

[0047] In one embodiment, if Figure 2 As shown, the second syringe assembly 200 further includes a second lower liquid level amplifier 251, which is electrically connected to the second lower liquid level sensor 250 to amplify the signal sensed by the second lower liquid level sensor 250, so that the glue in the second syringe 210 can be detected promptly and accurately when the second syringe assembly 200 is supplying glue, and it is determined whether the syringe assembly needs to be switched. The second syringe assembly 200 further includes a second upper liquid level amplifier 261, which is electrically connected to the second upper liquid level sensor 260 to amplify the signal sensed by the second upper liquid level sensor 260, so that the glue in the second syringe 210 can be detected promptly and accurately when the second syringe assembly 200 is replenishing glue, and it is determined whether the glue replenishment needs to be stopped.

[0048] In addition, please refer to Figure 5 , which is a flow chart of the glue supply method of the present invention. The glue supply method of the present invention comprises,

[0049] A glue supply system 1 is provided, which includes a primary glue supply device 10, a secondary glue supply device 20 and a spray valve 30. The secondary glue supply device 20 is connected between the primary glue supply device 10 and the spray valve 30. The distance between the spray valve 30 and the secondary glue supply device 20 is much smaller than the distance between the primary glue supply device 10 and the secondary glue supply device 20. The secondary glue supply device 20 can move synchronously with the spray valve 30, so that the distance between the secondary glue supply device 20 and the spray valve 30 is constant. The secondary glue supply device 20 includes a first syringe assembly 100, which includes a first syringe 110, a first valve 120, a second valve 130 and a first solenoid valve 140. The first syringe 110 is used to accommodate the glue, and the first syringe 110 has a first end 111 and a second end 112 opposite to each other; the first valve 120 is connected to the primary glue supply device 10 and the first end 111 of the first syringe 110; the second valve 130 is connected to the spray valve 30 and the first end 111 of the first syringe 110; and the first solenoid valve 140 is connected to the second end 112 of the first syringe 110.

[0050] When the first valve 120 is closed, the glue supply device 10 does not supply glue to the first syringe 110; the first solenoid valve 140 is in an open state and provides positive pressure to the first syringe 110 from the second end 112, opening the second valve 130 so that the glue in the first syringe 110 flows out from the first end 111 through the second valve 130 and the spray valve 30.

[0051] In one embodiment, the first syringe assembly 100 further includes a first lower liquid level sensor 150, which is disposed adjacent to the first end 111 of the first syringe 110. The secondary glue supply device 20 further includes a second syringe assembly 200 disposed in parallel with the first syringe assembly 100. The second syringe assembly 200 includes a second syringe 210, a third valve 220, a fourth valve 230, and a second solenoid valve 240. The second syringe 210 is used to accommodate the glue and has opposing third and fourth ends 211 and 212. The third valve 220 is connected to the primary glue supply device 10 and the third end 211 of the second syringe 210. The fourth valve 230 is connected to the spray valve 30 and the third end 211 of the second syringe 210. The second solenoid valve 240 is connected to the fourth end 212 of the second syringe 210. When the first syringe assembly 100 is supplying glue, the first lower liquid level sensor 150 continuously detects the glue in the first syringe 110. If the first lower liquid level sensor 150 cannot detect glue in the first syringe 110, the second valve 130 is closed to stop supplying glue to the spray valve 30. The first valve 120 is opened to receive glue from the primary glue supply device 10. The first solenoid valve 140 is closed and in an exhaust state, allowing the primary glue supply device 10 to supply glue to the first syringe 110 through a pressure difference. The third valve 220 is closed, and the primary glue supply device 10 does not supply glue to the second syringe 210. The second solenoid valve 240 is opened and provides positive pressure to the second syringe 210 from the fourth end 212. The fourth valve 230 is opened, allowing the glue in the second syringe 210 to flow out from the third end 211 through the fourth valve 230 and the spray valve 30.

[0052] The glue supply system and glue supply method of the present invention include a secondary glue supply device, which has a first syringe assembly. Through a near-point syringe-type secondary glue supply mode, it has a glue supply path section, has low pressure loss, and improves the stability of glue supply. Furthermore, the secondary glue supply device can be provided with a first syringe assembly and a second syringe assembly in parallel. When the amount of glue in the first syringe assembly is insufficient, the second syringe assembly is switched to supply glue to the outside. In this way, the glue supply system does not need to stop operating during the process of adding and changing glue in the secondary glue supply device, thereby improving production efficiency.

[0053] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A glue supply system, characterized in that Include, One-time glue supply device; Secondary glue supply device; and The secondary glue supply device is connected between the primary glue supply device and the spray valve, and the distance between the spray valve and the secondary glue supply device is much smaller than the distance between the primary glue supply device and the secondary glue supply device; and the secondary glue supply device can move synchronously with the spray valve, so that the distance between the secondary glue supply device and the spray valve is constant; Wherein, the secondary glue supply device includes a first syringe assembly, and the first syringe assembly includes: A first syringe for containing colloid, the first syringe having a first end and a second end opposite to each other; a first valve connected to the primary glue supply device and the first end of the first syringe; A second valve connected to the spray valve and the first end of the first syringe; and a first solenoid valve connected to the second end of the first syringe; When the secondary glue supply device supplies glue, the first valve is closed, the primary glue supply device does not supply glue to the first syringe, the first solenoid valve is in an open state and provides positive pressure to the first syringe from the second end, and the second valve is opened to allow the glue in the first syringe to flow out from the first end through the second valve and the spray valve.

2. The glue supply system according to claim 1, characterized in that: The primary glue supply device includes a glue storage barrel unit. When the first valve is opened, the primary glue supply device provides positive pressure to the glue storage barrel unit so that the glue storage barrel unit discharges glue and provides it to the first syringe through the hose and the first valve.

3. The glue supply system according to claim 2, characterized in that: The one-time glue supply device also includes a weighing unit and an alarm unit. The weighing unit is electrically connected to the alarm unit. The glue storage barrel unit is placed on the weighing unit. A reserved weight is set in the weighing unit. The weighing unit is used to continuously detect the actual weight of the glue storage barrel unit. If the actual weight is less than the reserved weight, the alarm unit will alarm.

4. The glue supply system according to claim 1, characterized in that: The first syringe assembly further includes a first lower liquid level sensor, which is disposed adjacent to the first end of the first syringe. The secondary glue supply device further includes a second syringe assembly disposed in parallel with the first syringe assembly, the second syringe assembly including: a second syringe for containing the colloid, the second syringe having a third end and a fourth end opposite to each other; a third valve connected to the primary glue supply device and the third end of the second syringe; a fourth valve connected to the spray valve and the third end of the second syringe; a second solenoid valve connected to the fourth end of the second syringe; When the first syringe assembly is supplying glue, the first lower liquid level sensor continuously detects the glue in the first syringe. If the first lower liquid level sensor cannot detect the glue in the first syringe, the second valve is closed to stop supplying glue, the first valve is opened, and the first solenoid valve is closed and in an exhaust state so that the primary glue supply device can supply glue to the first syringe; and the third valve is closed, the primary glue supply device does not supply glue to the second syringe, the second solenoid valve is opened and provides positive pressure to the second syringe from the fourth end, and the fourth valve is opened to allow the glue in the second syringe to flow out from the third end through the fourth valve and the spray valve.

5. The glue supply system according to claim 4, characterized in that: The first syringe assembly further includes a first upper liquid level sensor disposed adjacent to the second end of the first syringe; When the primary glue supply device supplies glue to the first syringe, the first upper liquid level sensor continuously detects the glue in the first syringe. If the first upper liquid level sensor detects the glue in the first syringe, the first valve is closed and the primary glue supply device stops supplying glue. The first solenoid valve is changed to an open state and provides positive pressure to the first syringe from the second end, while the second valve remains closed, so that the first syringe assembly enters a ready state.

6. The glue supply system according to claim 4, characterized in that: The second syringe assembly also includes a second lower liquid level sensor, which is arranged adjacent to the third end of the second syringe. The second lower liquid level sensor is used to continuously detect the colloid in the second syringe when the second syringe assembly is supplying glue. If the second lower liquid level sensor cannot detect the colloid in the second syringe, the fourth valve is closed to stop supplying glue, the third valve is opened, and the second solenoid valve is closed and in an exhaust state so that the one-time glue supply device can supply glue to the second syringe; and the first valve is in a closed state, the one-time glue supply device does not supply glue to the first syringe, the first solenoid valve is in an open state and provides positive pressure to the first syringe from the second end, and the second valve is opened to allow the colloid in the first syringe to flow out through the second valve and the spray valve from the first end.

7. The glue supply system according to claim 6, characterized in that: The second syringe assembly further includes a second upper liquid level sensor disposed adjacent to the fourth end of the second syringe; When the primary glue supply device supplies glue to the second syringe, the second upper liquid level sensor continuously detects the glue in the second syringe. If the second upper liquid level sensor detects the glue in the second syringe, the third valve is closed and the primary glue supply device stops supplying glue. The second solenoid valve is changed to an open state and provides positive pressure to the second syringe from the fourth end. At the same time, the fourth valve remains closed, so that the second syringe assembly enters a ready state.

8. The glue supply system according to claim 4, characterized in that: The glue supply system also includes a first three-way valve, a second three-way valve and a third three-way valve. The first three-way valve is connected to the first valve, the second valve and the first syringe; the second three-way valve is connected to the third valve, the fourth valve and the second syringe; and the third three-way valve is connected to the second valve, the fourth valve and the spray valve.

9. The glue supply system according to claim 4, characterized in that: The first syringe assembly further includes a first lower liquid level amplifier electrically connected to the first lower liquid level sensor to amplify a signal sensed by the first lower liquid level sensor.

10. A glue supply method, characterized in that Include, A glue supply system is provided, comprising a primary glue supply device, a secondary glue supply device, and a spray valve. The secondary glue supply device is connected between the primary glue supply device and the spray valve, and the distance between the spray valve and the secondary glue supply device is much smaller than the distance between the primary glue supply device and the secondary glue supply device. The secondary glue supply device can move synchronously with the spray valve, so that the distance between the secondary glue supply device and the spray valve is constant. The secondary glue supply device includes a first syringe assembly, the first syringe assembly including a first syringe, a first valve, a second valve, and a first solenoid valve. The first syringe is used to accommodate glue and has a first end and a second end opposite to each other. The first valve is connected to the primary glue supply device and the first end of the first syringe. The second valve is connected to the spray valve and the first end of the first syringe. The first solenoid valve is connected to the second end of the first syringe. When the first valve is closed, the one-time glue supply device does not supply glue to the first syringe; when the first solenoid valve is in an open state and provides positive pressure to the first syringe from the second end, the second valve is opened, so that the glue in the first syringe flows out from the first end through the second valve and the spray valve.

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