Glue suction anti-blocking detection method

Abstract

The present invention discloses a method for detecting glue suction and preventing blocking, comprising the following steps: Step 1, adding the range of effective negative pressure values ​​of the glue suction port in the software system, and setting and as the negative pressure detection parameters of the glue suction, adding a negative pressure sensor for real-time acquisition of the negative pressure value of the glue suction port on the glue dispensing machine; Step 2, negative pressure air intake of the glue dispensing machine; Step 3, adjusting the glue suction position: manually adjusting the glue suction position, moving the nozzle to the top of the glue suction position, so that the nozzle is just aligned with the glue suction port, and close to the glue suction port, and a certain distance from the glue suction port; Step 4, turning on the negative pressure of glue suction: before executing the glue suction, turning on the negative pressure at the glue suction port; Step 5, starting the glue suction: after the negative pressure of the glue suction is turned on for milliseconds, it is determined whether the negative pressure value of the glue suction port is within the normal range. The method avoids the phenomenon of weak or no glue suction, avoids the nozzle with residual glue from continuing to operate, and effectively guarantees the operation effect of the nozzle.

Description

Technical Field

[0001] The invention relates to the technical field of glue suction by nozzles, in particular to a glue suction anti-blocking detection method. Background Art

[0002] The nozzle is one of the important components of the glue dispensing machine. In order to ensure that the nozzle can achieve accurate dispensing and spraying of glue, it is necessary to regularly use the glue suction port to clean the nozzle. Because the glue suction position is set manually, it is easy for the glue suction position to be unreasonable. If the glue suction position is set unreasonable, it may affect the glue suction effect. If the nozzle is too close to the glue suction port, it may cause the glue suction port to be blocked and the glue suction cleaning effect cannot be achieved; if the nozzle is too far away from the glue suction port, the glue suction airflow may not affect the residual glue in the nozzle, and the glue suction cleaning effect cannot be achieved.

[0003] Currently in the industry, the following two methods are usually used to set the glue suction position:

[0004] 1. According to experience, manually visually confirm whether the position between the nozzle and the glue suction port is normal;

[0005] 2. Use a feeler gauge to confirm whether the distance between the nozzle and the glue suction port meets the parameters recommended by the manufacturer.

[0006] Obviously, there are large errors in the above two settings. If the glue suction position is abnormal due to setting problems, the glue suction effect cannot be achieved. The alarm cannot be detected in time during the glue suction process, and the user will not be reminded to reset the glue suction position, causing the nozzle with residual glue to continue to operate, affecting the operation effect. If the nozzle with residual glue continues to operate, the glue point may be deviated, the glue residue may be aggravated, and the residual glue may drip on the product, affecting the product quality. Summary of the invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0008] To this end, the present invention proposes a glue suction anti-blocking detection method to avoid weak glue suction or no glue suction, to prevent the nozzle with residual glue from continuing to operate, and to effectively ensure the operating effect of the nozzle.

[0009] The anti-blocking detection method for glue suction according to the embodiment of the present invention is applicable to a glue dispensing machine. After setting the glue suction position, the negative pressure of the glue suction port is monitored to determine whether the glue suction port performs normal glue suction cleaning work on the nozzle, and specifically includes the following steps:

[0010] Step 1: Add an effective negative pressure value range and negative pressure sensor for the glue suction port: Add an effective negative pressure value range for the glue suction port in the operation control process module of the software system. , and , Set it as the negative pressure detection parameter for glue suction. At the same time, add a negative pressure sensor on the glue dispensing machine to collect the negative pressure value of the glue suction port in real time;

[0011] Step 2: Negative pressure air intake of the dispensing machine: The negative pressure of the dispensing machine is based on the set standard. Inlet pressure in kPa, where ;

[0012] Step 3: Adjust the glue suction position: Manually adjust the glue suction position, move the nozzle to the top of the glue suction position, align the nozzle with the glue suction port, and keep it close to the glue suction port and at a certain distance from the glue suction port;

[0013] Step 4: Turn on the negative pressure for glue suction: Before performing glue suction, turn on the negative pressure at the glue suction port;

[0014] Step 5: Start sucking glue: When the negative pressure of glue suction is turned on After milliseconds, it starts to determine whether the negative pressure value of the glue suction port is within the normal range That is, the time from starting the suction negative pressure to starting the suction monitoring is milliseconds; use the negative pressure sensor to monitor the negative pressure value at the glue suction port in real time:

[0015] If the negative pressure value of the suction port is judged to be within the normal range If the suction is normal, the negative pressure sensor stops monitoring the negative pressure value of the suction port after the suction is completed. After milliseconds, the negative pressure at the glue suction port is closed;

[0016] If the negative pressure value of the suction port exceeds the normal range , it means that the glue suction is abnormal, the alarm stops, and a manual check is made to see if the glue suction port and the glue suction position are normal. If the manual inspection shows that the glue suction port is blocked or the glue suction position is abnormal, the glue suction port is cleaned or the glue suction position is reset to confirm.

[0017] The beneficial effect of the present invention is that when the glue suction position is set unreasonably, or the glue suction port is blocked, it can be detected and an alarm can be sounded in time during the glue suction process, reminding the user to reset the glue suction position, avoiding weak glue suction or no glue suction, and preventing the nozzle with residual glue from continuing to operate, effectively ensuring the operating effect of the nozzle.

[0018] According to one embodiment of the present invention, in the second step, the negative pressure of the dispensing machine is set to a pressure of -40 to -100 kPa.

[0019] According to one embodiment of the present invention, in the fifth step, if the negative pressure value of the glue suction port monitored in real time by the negative pressure sensor is less than , it means that the glue suction port is blocked.

[0020] According to one embodiment of the present invention, in the fifth step, if the negative pressure value of the glue suction port monitored in real time by the negative pressure sensor is greater than , it means the nozzle is too far away from the glue suction port.

[0021] According to one embodiment of the present invention, the position of the glue suction port is fixed, and the nozzle moves freely in the coordinate system. When the glue suction position is manually set, the nozzle is located directly above the glue suction port.

[0022] According to one embodiment of the present invention, in the second step, the negative pressure air intake of the dispensing machine is provided by an external vacuum generator.

[0023] According to one embodiment of the present invention, in the second step, the negative pressure air intake of the glue dispensing machine is provided by connecting a negative pressure air source to the glue dispensing machine.

[0024] According to an embodiment of the present invention, in the third step, the distance between the nozzle and the glue suction port is 0.1 to 2 mm.

[0025] According to one embodiment of the present invention, in the fifth step, after the glue suction is performed for 300 to 600 milliseconds, it is determined whether the negative pressure value of the glue suction port is within the normal range. Inside.

[0026] According to one embodiment of the present invention, in the fifth step, after 1 to 500 milliseconds have passed since the glue suction was completed, the negative pressure at the glue suction port is closed.

[0027] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 is a graph of negative pressure versus time;

[0031] Figure 2 It is the position relationship diagram between the nozzle and the glue suction port;

[0032] Figure 3 It is a flow chart of the present invention.

[0033] The reference numerals in the figure are: 1, glue dispensing machine; 2, nozzle; 3, glue suction port. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The glue suction anti-blocking detection method according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] See Figure 1 and Figure 2 The anti-blocking detection method for glue suction of the present invention is applicable to a glue dispensing machine 1. After setting the glue suction position, the negative pressure of the glue suction port 3 is monitored to determine whether the glue suction port 3 performs normal glue suction cleaning work on the nozzle 2. Specifically, the method includes the following steps:

[0037] Step 1: Add the effective negative pressure value range and negative pressure sensor of the glue suction port 3: Add the effective negative pressure value range of the glue suction port 3 in the operation control process module of the software system , and , Set as the negative pressure detection parameter for glue suction, which also needs to be saved in the software configuration file. At the same time, add a negative pressure sensor on the glue dispensing machine 1 for real-time collection of the negative pressure value of the glue suction port 3; the effective negative pressure value range of the glue suction port 3 is It is set based on confirming that the glue suction effect is good.

[0038] Step 2: Negative pressure air intake of dispensing machine 1: The negative pressure of dispensing machine 1 is based on the set standard. Inlet pressure in kPa, where The negative pressure air intake of the glue dispensing machine 1 is provided by an external vacuum generator or by connecting the negative pressure air source in the factory to the glue dispensing machine 1.

[0039] Preferably, It is -40 to -100 kPa, that is, the negative pressure of the dispensing machine 1 is set to -40 to -100 kPa.

[0040] Furthermore, preferably, It is -10 to -70 kPa, that is, the negative pressure of the dispensing machine 1 is set to -10 to -70 kPa.

[0041] It should be noted that the negative pressure of -10 kPa, -40 kPa, -70 kPa and -100 kPa all have a negative sign "-". The negative sign "-" only represents the direction of the pressure, and the value after the negative sign "-" represents the magnitude of the pressure. That is to say, the -40 kPa mentioned above is smaller than -100 kPa, and -10 kPa is smaller than -70 kPa.

[0042] Step 3, adjusting the glue suction position: manually adjusting the glue suction position, moving the nozzle 2 to above the glue suction position, so that the nozzle 2 is just aligned with the glue suction port 3, and close to the glue suction port 3, and a certain distance away from the glue suction port 3. Preferably, the distance between the nozzle 2 and the glue suction port 3 is 0.1 to 2 mm; wherein, the position of the glue suction port 3 is fixed, and the nozzle 2 moves freely in the coordinate system. When the glue suction position is manually set, the nozzle 2 is located directly above the glue suction port 3.

[0043] Step 4: Turn on the negative pressure for glue suction: Before performing glue suction, turn on the negative pressure at the glue suction port 3;

[0044] Step 5: Start sucking glue: When the negative pressure of glue suction is turned on After milliseconds, it starts to determine whether the negative pressure value of the glue suction port 3 is within the normal range That is, the time from starting the suction negative pressure to starting the suction monitoring is milliseconds; using a negative pressure sensor to monitor the negative pressure value at the glue suction port 3 in real time: preferably, It is 300 to 600 milliseconds, that is, after the glue suction is executed for 300 to 600 milliseconds, it starts to determine whether the negative pressure value of the glue suction port 3 is within the normal range The purpose of setting the range of 300 to 600 is to start measuring the negative pressure value after the negative pressure stabilizes, because it takes some time to go from normal pressure to normal negative pressure. Figure 1 As shown, the slashed part on the left is the pressure change part.

[0045] If the negative pressure value of the glue suction port 3 is judged to be within the normal range If the suction is normal, the negative pressure sensor stops monitoring the negative pressure value of the suction port 3 after the suction is completed. After milliseconds, the negative pressure at the glue suction port 3 is closed;

[0046] The entire glue suction stage takes 100 to 10,000 milliseconds, and the specific duration needs to be set in combination with the diameter of the glue suction port 3, the negative pressure of the glue suction port 3, and the viscosity of the glue used.

[0047] When the negative pressure of the glue suction port 3 is the same and the viscosity of the glue used is the same, the larger the diameter of the glue suction port 3 is, the longer the glue suction stage takes, and the smaller the diameter of the glue suction port 3 is, the shorter the glue suction stage takes.

[0048] When the diameter of the glue suction port 3 is the same and the viscosity of the glue used is the same, the greater the negative pressure of the glue suction port 3, the shorter the glue suction stage is, and the smaller the negative pressure of the glue suction port 3, the longer the glue suction stage is.

[0049] When the diameter of the glue suction port 3 is the same and the negative pressure of the glue suction port 3 is the same, the greater the viscosity of the glue used, the longer the glue suction stage takes, and the smaller the viscosity of the glue used, the shorter the glue suction stage takes.

[0050] Preferably, The negative pressure at the glue suction port 3 is closed after 1 to 500 milliseconds after the glue suction is completed.

[0051] If the negative pressure value of the suction port 3 exceeds the normal range , it means that the glue suction is abnormal, the alarm is sounded and the machine is shut down, and a manual check is made to see if the glue suction port 3 and the glue suction position are normal. If the manual check shows that the glue suction port 3 is blocked or the glue suction position is abnormal, the glue suction port 3 is cleaned or the glue suction position is reset to confirm.

[0052] Specifically, if the negative pressure value of the glue suction port 3 monitored by the negative pressure sensor in real time is less than , it means that the glue suction port 3 is blocked and the glue suction port 3 is blocked by residual glue after long-term use; if the negative pressure value of the glue suction port 3 monitored by the negative pressure sensor in real time is greater than , it means that the nozzle 2 is too far away from the glue suction port 3, and the glue suction effect is weak or even no glue suction effect.

[0053] It is necessary to add that, if Figure 2 As shown, the glue dispensing machine 1 has several nozzles 2 and several glue suction ports 3. The position of the glue suction port 3 is fixed, the nozzle 2 can be moved, and each glue suction port 3 can be shared. Each nozzle 2 can be filled with the same glue or different glues. Generally, no more than two different glues use the same glue suction port 3. The remaining glue is stored in the glue bucket above the nozzle 2. There is very little glue in the nozzle 2. The glue suction is mainly to suck the glue outside the nozzle 2. The diameter of the nozzle 2 is very small, and the diameter of the nozzle 2 is usually less than or equal to 0.5 mm. The nozzle 2 sprays a certain number of times (such as: Tracks, is the process parameter, is a positive integer greater than or equal to 1, which can be freely set by the user), the glue will be sucked after that, and there is no need to wait until the machine is shut down to suck the glue.

[0054] The glue suction anti-blocking detection method can detect and alarm in time during the glue suction process when the glue suction position is set unreasonably or the glue suction port 3 is blocked (blockage caused by solidification of residual glue), reminding the user to reset the glue suction position to prevent the nozzle 2 with residual glue from continuing to operate, thereby effectively ensuring the operation effect of the nozzle 2; specifically, by adding a negative pressure sensor to the glue suction port 3 in hardware, the negative pressure value of the glue suction port 3 can be collected in real time; by adding a setting range of the effective negative pressure of the glue suction port 3 in the software , this range has a minimum value and a maximum value If the negative pressure value of the glue suction port 3 monitored by the negative pressure sensor in real time is If the negative pressure value of the glue suction port 3 monitored by the negative pressure sensor in real time is within the range of If the negative pressure value of the glue suction port 3 is less than , it means that the glue suction port 3 is blocked. The glue suction port 3 is blocked by residual glue after long-term use. If the negative pressure value of the glue suction port 3 is greater than , it means that nozzle 2 is too far away from glue suction port 3; when executing the glue suction process, the negative pressure sensor monitors the negative pressure value of glue suction port 3 in real time. If the negative pressure value of glue suction port 3 is If it is within the range, it means the glue absorption is normal.

[0055] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for detecting glue suction and preventing blockage, characterized in that: Applicable to glue dispensing machines. After setting the glue suction position, the negative pressure of the glue suction port is monitored to determine whether the glue suction port performs normal glue suction and cleaning work on the nozzle. The specific steps include: Step 1: Add an effective negative pressure value range and negative pressure sensor for the glue suction port: Add an effective negative pressure value range for the glue suction port in the operation control process module of the software system. , and , Set it as the negative pressure detection parameter for glue suction. At the same time, add a negative pressure sensor on the glue dispensing machine to collect the negative pressure value of the glue suction port in real time; Step 2: Negative pressure air intake of the dispensing machine: The negative pressure of the dispensing machine is based on the set standard. Inlet pressure in kPa, where ; Step 3: Adjust the glue suction position: Manually adjust the glue suction position, move the nozzle to the top of the glue suction position, align the nozzle with the glue suction port, and keep it close to the glue suction port and at a certain distance from the glue suction port; Step 4: Turn on the negative pressure for glue suction: Before performing glue suction, turn on the negative pressure at the glue suction port; Step 5: Start sucking glue: When the negative pressure of glue suction is turned on After milliseconds, it starts to determine whether the negative pressure value of the glue suction port is within the normal range That is, the time from starting the suction negative pressure to starting the suction monitoring is milliseconds; use the negative pressure sensor to monitor the negative pressure value at the glue suction port in real time; If the negative pressure value of the suction port is judged to be within the normal range If the suction is normal, the negative pressure sensor stops monitoring the negative pressure value of the suction port after the suction is completed. After milliseconds, the negative pressure at the glue suction port is closed; If the negative pressure value of the suction port exceeds the normal range , it means that the glue suction is abnormal, the alarm stops, and a person is asked to manually check whether the glue suction port and the glue suction position are normal. If the glue suction port is blocked or the glue suction position is abnormal during manual inspection, the glue suction port is cleaned or the glue suction position is reset to confirm.

2. The method for detecting glue suction and preventing blockage according to claim 1, characterized in that: In the second step, the negative pressure of the dispensing machine is set to a pressure of -40 to -100 kPa.

3. The method for detecting glue suction and preventing blockage according to claim 1, characterized in that: In the fifth step, if the negative pressure value of the suction port monitored by the negative pressure sensor in real time is less than , it means that the glue suction port is blocked.

4. The method for detecting glue suction and preventing blockage according to claim 1, characterized in that: In the fifth step, if the negative pressure value of the suction port monitored by the negative pressure sensor in real time is greater than , it means the nozzle is too far away from the glue suction port.

5. The method for detecting glue suction and preventing blockage according to claim 1, characterized in that: The position of the glue suction port is fixed, and the nozzle is free to move in the coordinate system. When the glue suction position is manually set, the nozzle is located directly above the glue suction port.

6. The method for detecting glue suction and preventing blockage according to claim 1, characterized in that: In the second step, the negative pressure air intake of the dispensing machine is provided by an external vacuum generator.

7. The method for detecting glue suction and preventing blockage according to claim 1, characterized in that: In the second step, the negative pressure air intake of the glue dispensing machine is provided by connecting a negative pressure air source to the glue dispensing machine.

8. The method for detecting glue suction and preventing blockage according to claim 1, characterized in that: In the third step, the distance between the nozzle and the glue suction port is 0.1 to 2 mm.

9. The method for detecting glue suction and preventing blockage according to claim 1, characterized in that: In the fifth step, after the glue suction is performed for 300 to 600 milliseconds, it is determined whether the negative pressure value of the glue suction port is within the normal range. Inside.

10. The method for detecting glue suction and preventing blockage according to claim 1, characterized in that: In the fifth step, after 1 to 500 milliseconds have passed since the glue suction was completed, the negative pressure at the glue suction port is closed.

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