Glue application equipment and glue application method

Abstract

This disclosure provides a glue application apparatus and method, belonging to the field of glue application technology. The glue application apparatus includes a glue gun, a pressure sensor, a PLC, and a display screen. The pressure sensor is connected to the glue gun and detects the air pressure inside the glue gun. It converts the detected air pressure signal into an electrical signal and transmits it to the PLC. The PLC counts the actual number of glue application segments based on the electrical signal sent by the pressure sensor. When the electrical signal changes from high to low, the actual number of glue application segments increases by one. The PLC has a preset number of glue application segments. The PLC is electrically connected to the display screen, which displays the actual number of glue application segments and the preset number of glue application segments. Therefore, operators do not need to count manually; they can determine whether the glue application is complete simply by observing the displayed number of glue application segments and the preset number of glue application segments. This improves the efficiency of checking for glue leakage on parts and prevents glue leakage from occurring on parts.

Description

Technical Field

[0001] This disclosure relates to the field of adhesive coating technology, and in particular to an adhesive coating apparatus and adhesive coating method. Background Technology

[0002] As automakers increasingly demand higher production quality and efficiency, the requirements for each production process are becoming more stringent. In the welding workshop, to meet requirements such as sealing and vibration damping, the surfaces of parts need to be coated with adhesive before welding. Each part has multiple areas to be coated. Adhesive application is an indispensable part of modern automobile manufacturing, ensuring a comprehensive improvement in the safety, durability, and comfort of the vehicle body. If the actual number of adhesive-coated sections on a part is less than the required number, it indicates that there is adhesive leakage. If a part with adhesive leakage is assembled into the vehicle body, it will cause functional defects in the body, and the part cannot be removed, necessitating the scrapping of the entire vehicle.

[0003] In related technologies, manual visual inspection is mainly used to check for any areas of glue leakage on parts. However, manual visual inspection is inefficient (the standard inspection time is 1 second per area) and has a high error rate (the average error rate is about 1%).

[0004] Therefore, how to avoid glue leakage on parts and improve the inspection efficiency of glue leakage on parts are key issues that need to be addressed. Summary of the Invention

[0005] This disclosure provides a glue-applying device and a glue-applying method, which can solve the technical problems existing in the related art. The technical solutions of the glue-applying device and glue-applying method are as follows.

[0006] In a first aspect, this disclosure provides an adhesive application device, which includes an adhesive application gun, a pressure sensor, a PLC, and a display screen;

[0007] The pressure sensor is connected to the glue gun, and the pressure sensor is used to detect the air pressure inside the glue gun;

[0008] The PLC is electrically connected to the pressure sensor. The pressure sensor is used to convert the detected air pressure signal into an electrical signal and transmit it to the PLC. The PLC counts the actual number of glue application segments according to the electrical signal sent by the pressure sensor. When the electrical signal changes from a high level to a low level, the actual number of glue application segments increases by one. The PLC is set with a preset number of glue application segments.

[0009] The PLC and the display screen are electrically connected, and the display screen is used to display the actual number of glue application segments and the preset number of glue application segments.

[0010] In one possible implementation, the adhesive applicator further includes a button and a first alarm device;

[0011] Both the button and the first alarm device are electrically connected to the PLC. When the button is pressed, the PLC compares the actual number of glue application segments with the preset number of glue application segments. If the actual number of glue application segments is less than the preset number of glue application segments, the first alarm device will sound an alarm.

[0012] In one possible implementation, the adhesive applicator further includes a welding fixture;

[0013] The welding fixture is used to support the part. The welding fixture is electrically connected to the PLC. When the actual number of glue application segments is less than the preset number of glue application segments, the PLC controls the welding fixture to not clamp the part. When the actual number of glue application segments is greater than or equal to the preset number of glue application segments, the PLC controls the welding fixture to clamp the part.

[0014] In one possible implementation, the adhesive applicator further includes a first connector and a connecting pipe;

[0015] The glue gun has an opening, one end of the connecting tube is connected to the opening through the first connector, and the other end of the connecting tube is connected to the pressure sensor.

[0016] In one possible implementation, the glue gun includes a glue gun body, a nozzle, a handle, and a second connector;

[0017] The glue gun body is used to contain glue. One end of the glue gun body is connected to the nozzle, and the other end has the opening. The handle is fixed to the glue gun body and is connected to the interior of the glue gun body. The end of the handle away from the glue gun body is connected to the second connector, which is used to connect to an external air source.

[0018] In one possible implementation, the diameter of the connecting pipe is 5mm-8mm.

[0019] In one possible implementation, the connecting pipe is a flame-retardant hose.

[0020] In one possible implementation, the adhesive applicator further includes a second alarm device;

[0021] The second alarm device is electrically connected to the PLC. When the detected value of the pressure sensor is lower than the first pressure threshold or higher than the second pressure threshold, the second alarm device will sound an alarm, wherein the first pressure threshold is lower than the second pressure threshold.

[0022] In one possible implementation, the display screen is also used to display the location of the part to be coated with adhesive.

[0023] Secondly, this disclosure also provides a method for applying adhesive, the method being applied to an adhesive application apparatus as described in any of the first aspects, the method comprising:

[0024] The PLC is configured with the preset number of adhesive application segments;

[0025] The pressure sensor collects the air pressure inside the glue gun;

[0026] The PLC counts the actual number of glue application segments based on the electrical signal sent by the pressure sensor, wherein the actual number of glue application segments increases by one when the electrical signal changes from a high level to a low level.

[0027] The display screen shows the actual number of adhesive application segments and the preset number of adhesive application segments.

[0028] The technical solution provided in this disclosure includes at least the following beneficial effects:

[0029] This disclosure provides a glue application device. When a worker applies glue to a part, the pressure in the glue gun first increases and then decreases. A PLC can detect the pressure change in the glue gun through a pressure sensor, thereby counting the actual number of glue application segments. Therefore, the worker does not need to count manually; they only need to observe the actual number of glue application segments and the preset number of glue application segments displayed on the screen to determine whether the current glue application work is complete. If the actual number of glue application segments is less than the preset number, it indicates that the current glue application work is not complete, or there are glue leaks on the part. The worker can check multiple glue-receiving locations on the part and then apply glue to the leaked areas. If the actual number of glue application segments is greater than or equal to the preset number, it indicates that there are no glue leaks on the part, and the current glue application work is complete. This improves the efficiency of checking for glue leaks on parts and can prevent glue leaks from occurring on parts.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of an adhesive application device shown in an embodiment of this disclosure;

[0033] Figure 2This is a schematic diagram of the electrical connection relationship of an adhesive application device according to an embodiment of this disclosure;

[0034] Figure 3 This is a schematic diagram of the structure of a display screen 4 shown in an embodiment of the present disclosure.

[0035] Legend:

[0036] 1. Glue gun; 11. Glue gun body; 12. Nozzle; 13. Handle; 14. Second connector; 15. Trigger;

[0037] 2. Pressure sensor;

[0038] 3. PLC;

[0039] 4. Display screen;

[0040] 5. Buttons;

[0041] 6. First alarm device;

[0042] 7. Welding fixtures;

[0043] 8. First connector;

[0044] 9. Connecting pipe;

[0045] 100. Second alarm device.

[0046] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings.

[0048] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0049] As automakers increasingly demand higher production quality and efficiency, the requirements for each production process are becoming more stringent. In the welding workshop, to meet requirements such as sealing and vibration damping, the surfaces of parts need to be coated with adhesive before welding. Each part has multiple areas to be coated. Adhesive application is an indispensable part of modern automobile manufacturing, ensuring a comprehensive improvement in the safety, durability, and comfort of the vehicle body. If the actual number of adhesive-coated sections on a part is less than the required number, it indicates that there is adhesive leakage. If a part with adhesive leakage is assembled into the vehicle body, it will cause functional defects in the body, and the part cannot be removed, necessitating the scrapping of the entire vehicle.

[0050] In related technologies, manual visual inspection is mainly used to check for any areas of glue leakage on parts. However, manual visual inspection is inefficient (the standard inspection time is 1 second per area) and has a high error rate (the average error rate is about 1%).

[0051] Therefore, how to avoid glue leakage on parts and improve the inspection efficiency of glue leakage on parts are key issues that need to be addressed.

[0052] In view of the above-mentioned technical problems, this disclosure provides an adhesive application device, such as... Figures 1-3As shown, the glue applicator includes a glue gun 1, a pressure sensor 2, a PLC 3, and a display screen 4. The pressure sensor 2 is connected to the glue gun 1 and is used to detect the air pressure inside the glue gun 1. The PLC 3 is electrically connected to the pressure sensor 2, which converts the detected air pressure signal into an electrical signal and transmits it to the PLC 3. The PLC 3 counts the actual number of glue application segments based on the electrical signal sent by the pressure sensor 2. The actual number of glue application segments increases by one when the electrical signal changes from a high level to a low level. The PLC 3 has a preset number of glue application segments. The PLC 3 is electrically connected to the display screen 4, which displays the actual number of glue application segments and the preset number of glue application segments.

[0053] In this process, when applying adhesive to a part, the air source supplies gas into the glue gun 1, increasing the air pressure inside the glue gun 1 (by approximately 0.4 MPa to 0.6 MPa). This causes the adhesive inside the glue gun 1 to flow out, thus completing the adhesive application. After the adhesive flows out, the pressure inside the glue gun 1 decreases.

[0054] Pressure sensor 2 can have a 24V power supply line and an output line. The 24V power supply line and the output line are connected to the junction box to draw power from the junction box and connect to PLC 3.

[0055] When PLC3 acquires the falling edge electrical signal of pressure sensor 2, it automatically counts the actual number of adhesive application segments through a pre-written counting logic program.

[0056] Display screen 4 can also be called HMI (Human Machine Interface).

[0057] The preset number of adhesive application segments is the number of adhesive application segments required in the part's work instruction manual.

[0058] The technical solution provided in this disclosure involves a worker applying adhesive to a part. The pressure in the adhesive gun 1 first increases and then decreases. The PLC 3 detects the pressure change in the adhesive gun 1 via the pressure sensor 2, thereby counting the actual number of adhesive application segments. Therefore, the worker does not need to count manually; they only need to observe the actual number of adhesive application segments and the preset number of adhesive application segments displayed on the screen 4 to determine whether the adhesive application is complete. If the actual number of adhesive application segments is less than the preset number, it indicates that the adhesive application is not complete, or there are areas of adhesive leakage on the part. The worker can then check multiple areas on the part that require adhesive application and apply adhesive to the missed areas. If the actual number of adhesive application segments is greater than or equal to the preset number, it indicates that there is no adhesive leakage on the part, and the adhesive application is complete. This improves the efficiency of checking for adhesive leakage on parts and prevents adhesive leakage from occurring on parts.

[0059] In some examples, such as Figure 2 As shown, the glue application device also includes a button 5 and a first alarm device 6. Both button 5 and the first alarm device 6 are electrically connected to the PLC3. After applying glue to the part, the operator can press button 5 to indicate that the glue application is complete. When button 5 is pressed, the PLC3 compares the actual number of glue application segments with the preset number of glue application segments. If the actual number of glue application segments is less than the preset number, the first alarm device 6 will sound an alarm. This reminds the operator that the actual number of glue application segments for the current part is less than the preset number, indicating that the glue application for the current part is not complete, and thus prompts the operator to inspect the current part.

[0060] Furthermore, the first alarm device 6 can also remind staff to look at the display screen 4. Based on the actual number of glue application segments and the preset number of glue application segments displayed on the display screen, staff can determine how many glue leakage points exist on the current part, thereby enabling more accurate inspection of the part and avoiding errors in the inspection process.

[0061] For example, the first alarm device 6 can be an alarm light, which can emit red or yellow light when the alarm is triggered. This embodiment does not specifically limit the specific alarm device 6.

[0062] In other examples, the first alarm device 6 can also be a buzzer, which vibrates and sounds when an alarm is triggered, thereby alerting staff.

[0063] Alternatively, in other examples, the first alarm device 6 may also be a buzzer with a light-emitting diode, so that the first alarm device 6 can emit light while emitting sound.

[0064] In the welding workshop, parts are typically placed on welding fixture 7 for adhesive application. After adhesive application, welding fixture 7 clamps the parts, thus enabling welding. If there are any areas of adhesive leakage after welding, the parts cannot be reworked and must be scrapped.

[0065] To avoid this situation, in some examples, such as Figure 2 As shown, the adhesive application device also includes a welding fixture 7. The welding fixture 7 is used to support the parts and is electrically connected to the PLC3. When the actual number of adhesive application segments is less than the preset number, the PLC3 controls the welding fixture 7 to not clamp the parts, thus preventing welding. When the actual number of adhesive application segments is greater than or equal to the preset number, the PLC3 controls the welding fixture 7 to clamp the parts, enabling welding.

[0066] In this way, the glue gun 1 and the welding fixture 7 can achieve a timing interlock. Only when the part has been glued and there are no glue leaks can the welding fixture 7 clamp the part, thereby completing the welding. If there are glue leaks on the part, the fixture cannot clamp the part, thus avoiding welding parts that have not been glued. Furthermore, if the fixture cannot clamp the part, it also allows the operator to further inspect the part for glue leaks.

[0067] For example, when the operator presses button 5, if the actual number of adhesive application segments is less than the preset number of adhesive application segments, the PLC3 controls the welding fixture 7 to fail to clamp the part. If the actual number of adhesive application segments is greater than or equal to the preset number of adhesive application segments, the PLC3 controls the welding fixture 7 to clamp the part.

[0068] In some examples, such as Figure 1 As shown, the glue application device also includes a first connector 8 and a connecting tube 9. The glue gun 1 has an opening, one end of the connecting tube 9 is connected to the opening through the first connector 8, and the other end of the connecting tube 9 is connected to the pressure sensor 2.

[0069] When the air pressure in the glue gun 1 rises, the gas in the glue gun 1 can enter the connecting tube 9 through the opening, allowing the pressure sensor 2 to measure the pressure in the connecting tube 9. Since the connecting tube 9 is connected to the inside of the glue gun 1, the pressure in the connecting tube 9 is the same as the pressure in the glue gun 1.

[0070] The connecting pipe 9 can fix the pressure sensor 2 at the work station, avoiding the pressure sensor 2 being directly installed on the glue gun 1 and easily bumping into other parts.

[0071] For example, the first connector 8 is a quick-connect connector, which makes the connection and disassembly of the connecting pipe 9 more convenient and efficient.

[0072] In some examples, such as Figure 1 As shown, the glue applicator 1 includes a glue applicator body 11, a nozzle 12, a handle 13, and a second connector 14. The glue applicator body 11 is used to contain the glue. One end of the glue applicator body 11 is connected to the nozzle 12, and the other end has an opening. The handle 13 is fixed to the glue applicator body 11 and is connected to the interior of the glue applicator body 11. The end of the handle 13 away from the glue applicator body 11 is connected to the second connector 14, which is used to connect to an external air source.

[0073] The handle 13 has a trigger 15, which controls the air supply switch. The operator turns the air supply on or off by pulling the trigger, thereby controlling the extrusion of the glue. When the operator holds the handle 13 and pulls the trigger 15, the air supply is turned on, the air pressure in the glue gun body 11 increases, and the glue is extruded from the nozzle 12. At the same time, the air pressure in the connecting pipe 9 increases, so that the pressure sensor 2 detects the pressure change in the glue gun 1.

[0074] In some examples, the diameter of connecting pipe 9 is 5mm-8mm.

[0075] If the diameter of the connecting pipe 9 is too large, the air source needs to supply more gas to the glue gun 1 in order to increase the air pressure in the glue gun body 11 and the connecting pipe 9, which will result in lower glue application efficiency.

[0076] If the diameter of the connecting pipe 9 is too small, the gas in the glue gun 1 will not easily enter the connecting pipe 9, which will easily lead to an insignificant change in the air pressure in the connecting pipe 9. As a result, the pressure sensor 2 will have difficulty detecting significant changes in air pressure, causing errors in the PLC3 counting.

[0077] For example, the diameter of the connecting pipe 9 can be 6 mm.

[0078] The length of the connecting pipe 9 can be set according to actual needs, and this embodiment does not impose a specific limitation on it.

[0079] In some examples, connecting pipe 9 is a flame-retardant hose. Flame-retardant hoses can be used in working environments that require high temperature resistance and waterproofing, helping to improve work flexibility and safety.

[0080] In addition to calculating the actual number of glue application segments, pressure sensor 2 and PLC 3 can also monitor whether the pressure in glue gun 1 is within the normal range, ensuring that the glue output from glue gun 1 meets the requirements. If the pressure in glue gun 1 is too low, too little glue may be extruded, resulting in uneven glue application on the parts. If the pressure in glue gun 1 is too high, too much glue may be extruded, leading to glue waste.

[0081] Therefore, in some examples, such as Figure 2 As shown, the glue application device also includes a second alarm device 100. The second alarm device 100 is electrically connected to the PLC3. When the detection value of the pressure sensor 2 is lower than the first pressure threshold or higher than the second pressure threshold, the second alarm device 100 will sound an alarm, wherein the first pressure threshold is lower than the second pressure threshold. This ensures that the air pressure in the glue application gun 1 is relatively stable.

[0082] If the detection value of pressure sensor 2 is lower than the first pressure threshold, it indicates that the pressure in glue gun 1 is too low. At this time, the second alarm device 100 will sound an alarm, thereby reminding the staff to check and repair glue gun 1, or replace the air source.

[0083] If the pressure sensor 2 detects a value higher than the second pressure threshold, it indicates that the pressure in the glue gun 1 is too high. At this time, the second alarm device 100 will sound an alarm, thereby reminding the staff to check and repair the glue gun 1, or replace the air source.

[0084] The present invention does not specifically limit the structure and type of the second alarm device 100, and can be set according to actual needs.

[0085] For example, the second alarm device 100 may include two alarm lights. One alarm light illuminates when the pressure sensor 2 detects a value below a first pressure threshold. The other alarm light illuminates when the pressure sensor 2 detects a value above a second pressure threshold. The two alarm lights may have different colors or different flashing frequencies.

[0086] Alternatively, the second alarm device 100 may also include an alarm light that illuminates when the pressure sensor 2 detects a value below a first pressure threshold or above a second pressure threshold.

[0087] Alternatively, in some other examples, the second alarm device 100 may also include a buzzer that sounds when the pressure sensor 2 detects a value below a first pressure threshold or above a second pressure threshold.

[0088] In some examples, display screen 4 is also used to display the location of the part to be glued ( Figure 3 The bold black lines indicate the areas where glue will be applied. Display screen 4 shows an image of the part, with the areas to be glued marked on the image. This allows workers to apply glue to the part based on the image on the display screen.

[0089] This disclosure also provides a method for applying adhesive, which is applied to the above-mentioned adhesive application apparatus, and the method includes:

[0090] The PLC3 can be set with a preset number of adhesive application segments. The operator can input the preset number of adhesive application segments (e.g., 17) on the display screen 4. The PLC3 can read and store the preset number of adhesive application segments.

[0091] Pressure sensor 2 collects the air pressure inside glue gun 1. When glue gun 1 applies glue, the pressure inside glue gun 1 increases, thereby squeezing out the glue. After the glue application is completed, the air pressure inside glue gun 1 decreases.

[0092] The PLC3 counts the actual number of adhesive application segments based on the electrical signal sent by the pressure sensor 2. When the electrical signal changes from a high level to a low level, the actual number of adhesive application segments increases by one.

[0093] Display screen 4 shows the actual number of glue application segments and the preset number of glue application segments. Staff can view display screen 4 to determine if there are any glue leaks on the parts.

[0094] In some examples, the glue application device also includes button 5 and a first alarm device 6. After the worker finishes applying glue to the part, he presses button 5, and PLC3 compares the actual number of glue application segments with the preset number of glue application segments.

[0095] If the actual number of glue application segments is greater than or equal to the preset number of glue application segments, the actual number of glue application segments on display screen 4 is reset to zero. When the worker starts applying glue to the next part, PLC3 starts counting the actual number of glue application segments again, and the actual number of glue application segments is displayed on display screen 4.

[0096] PLC3 compares the actual number of glue-applied sections with the preset number of glue-applied sections. If the actual number of glue-applied sections is less than the preset number, the first alarm device 6 sounds, reminding the operator to inspect the parts. The operator then applies glue to the leaked areas, and PLC3 counts again. After the operator finishes applying the glue, they press button 5 again, and PLC3 compares the actual number of glue-applied sections with the preset number. If the actual number of glue-applied sections is greater than or equal to the preset number, the actual number of glue-applied sections on display screen 4 is reset to zero, and the first alarm device 6 stops sounding.

[0097] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A glue-applying device, characterized in that, The glue application device includes a glue gun (1), a pressure sensor (2), a programmable logic controller (PLC) (3), and a display screen (4). The pressure sensor (2) is connected to the glue gun (1), and the pressure sensor (2) is used to detect the air pressure inside the glue gun (1); The PLC (3) is electrically connected to the pressure sensor (2). The pressure sensor (2) is used to convert the detected air pressure signal into an electrical signal and transmit it to the PLC (3). The PLC (3) counts the actual number of glue application segments according to the electrical signal sent by the pressure sensor (2). When the electrical signal changes from a high level to a low level, the actual number of glue application segments increases by one. The PLC (3) is set with a preset number of glue application segments. The PLC (3) and the display screen (4) are electrically connected. The display screen (4) is used to display the actual number of glue application segments and the preset number of glue application segments.

2. The adhesive applicator according to claim 1, characterized in that, The adhesive applicator also includes a button (5) and a first alarm device (6). Both the button (5) and the first alarm device (6) are electrically connected to the PLC (3). When the button (5) is pressed, the PLC (3) compares the actual number of glue application segments with the preset number of glue application segments. If the actual number of glue application segments is less than the preset number of glue application segments, the first alarm device (6) will sound an alarm.

3. The adhesive applicator according to claim 1, characterized in that, The adhesive application device also includes a welding fixture (7). The welding fixture (7) is used to carry the part. The welding fixture (7) is electrically connected to the PLC (3). When the actual number of glue application segments is less than the preset number of glue application segments, the PLC (3) controls the welding fixture (7) to be unable to clamp the part. When the actual number of glue application segments is greater than or equal to the preset number of glue application segments, the PLC (3) controls the welding fixture (7) to clamp the part.

4. The adhesive applicator according to claim 1, characterized in that, The adhesive applicator also includes a first connector (8) and a connecting pipe (9). The glue gun (1) has an opening, one end of the connecting tube (9) is connected to the opening through the first connector (8), and the other end of the connecting tube (9) is connected to the pressure sensor (2).

5. The adhesive applicator according to claim 4, characterized in that, The glue gun (1) includes a glue gun body (11), a nozzle (12), a handle (13), and a second connector (14). The glue gun body (11) is used to contain glue. One end of the glue gun body (11) is connected to the nozzle (12), and the other end has the opening. The handle (13) is fixed to the glue gun body (11) and is connected to the interior of the glue gun body (11). The end of the handle (13) away from the glue gun body (11) is connected to the second connector (14). The second connector (14) is used to connect to an external air source.

6. The adhesive applicator according to claim 4, characterized in that, The diameter of the connecting pipe (9) is 5mm-8mm.

7. The adhesive applicator according to claim 4, characterized in that, The connecting pipe (9) is a flame-retardant hose.

8. The adhesive applicator according to any one of claims 1-7, characterized in that, The adhesive application device also includes a second alarm device (100). The second alarm device (100) is electrically connected to the PLC (3). When the detection value of the pressure sensor (2) is lower than the first pressure threshold or higher than the second pressure threshold, the second alarm device (100) will sound an alarm, wherein the first pressure threshold is less than the second pressure threshold.

9. The adhesive applicator according to claim 1, characterized in that, The display screen (4) is also used to display the position of the part to be coated with glue.

10. A method for applying adhesive, characterized in that, The adhesive application method is applied to the adhesive application apparatus as described in any one of claims 1-9, and the method includes: The PLC (3) sets the preset number of adhesive application segments; The pressure sensor (2) collects the air pressure inside the glue gun (1); The PLC (3) counts the actual number of glue application segments according to the electrical signal sent by the pressure sensor (2), wherein the actual number of glue application segments increases by one when the electrical signal changes from high level to low level; The display screen (4) displays the actual number of adhesive application segments and the preset number of adhesive application segments.

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