Automatic cleaning station and cleaning method for hot melt adhesive coating equipment

Abstract

The invention discloses an automatic cleaning station and a cleaning method for hot melt adhesive coating equipment, and relates to the technical field of patch production equipment auxiliary appliances, the automatic cleaning station comprises a control system, a second joint, a first joint, a first box body, a second box body, a third box body, a power device and a pipeline network; heating devices are arranged on the first box body and the second box body; the pipeline network enables the external air source and the hot melt adhesive coating equipment to form a forward passage and a reverse passage, so that the first box body, the hot melt adhesive coating equipment and the power device form a circulation loop; the external air source, the power device, the hot melt adhesive coating equipment and the first box body form a forward path; the second box body, the hot melt adhesive coating equipment and the power device form a circulation loop; the external air source, the power device, the second box body and the hot melt adhesive coating equipment form a forward path; and the power device, the third box body and the hot melt adhesive coating equipment form a forward path.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary tools for patch production equipment, and particularly relates to an automatic cleaning station and a cleaning method for hot melt adhesive coating equipment. Background Art

[0002] During the patch production process, it is necessary to coat a coil with hot melt adhesive through a hot melt adhesive coating device. Refer to the attached Figure 1 , the hot melt adhesive coating device 100 includes a coating head 102, a glue delivery pipe 104, a coating pump 103, and a glue tank 101. During the coating process, power is provided by the coating pump, and the glue in the glue tank is transported to the coating head through the glue delivery pipe for coating. After producing a batch of patches and before producing the next batch of patches, it is necessary to clean the hot melt adhesive coating device. Currently, when cleaning the hot melt adhesive coating device, an artificial cleaning method is adopted, that is, the coating head is disassembled, the coating pump is opened, the glue tank is opened, and the glue delivery pipe is removed and then cleaned separately. The disassembly and assembly of the coating head are rather cumbersome, consuming manpower and material resources, and the cleaning efficiency is low. The above problems urgently need to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic cleaning station for hot melt adhesive coating equipment, which can automatically clean without disassembling the hot melt adhesive coating equipment, reduce manpower consumption, and improve cleaning efficiency.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An automatic cleaning station for a hot melt adhesive coating device, comprising: a control system, a second joint for connecting to the coating head of the hot melt adhesive coating device, a first joint for connecting to the glue tank of the hot melt adhesive coating device, a first box body for containing a first cleaning liquid, a second box body for containing a second cleaning liquid, a third box body for containing a third cleaning liquid, a power device for providing power for the fluid flow, and a pipeline network for connecting an external air source, the first joint, the second joint, the first box body, the second box body, the third box body and the power device; heating devices are arranged on both the first box body and the second box body; the pipeline network forms a forward path and a reverse path between the external air source and the hot melt adhesive coating device, forms a circulation loop between the first box body, the hot melt adhesive coating device and the power device; forms a forward path between the external air source, the power device, the hot melt adhesive coating device and the first box body; forms a circulation loop between the second box body, the hot melt adhesive coating device and the power device; forms a forward path between the external air source, the power device, the second box body and the hot melt adhesive coating device; forms a forward path between the power device, the third box body and the hot melt adhesive coating device; the forward path is a path flowing from the glue tank to the coating head, and the reverse path is a path flowing from the coating head to the glue tank.

[0006] Optionally, the power device for providing power for the first cleaning liquid, the second cleaning liquid and the third cleaning liquid is a pump; or, the power device for providing power for the first cleaning liquid and the second cleaning liquid is a pump, and the power device for providing power for the third cleaning liquid is an external air source.

[0007] Optionally, the first cleaning liquid is paraffin or edible oil, the second cleaning liquid is a degreaser, and the third cleaning liquid is water.

[0008] Optionally, the power devices for the first cleaning liquid and the second cleaning liquid include a first pump and a second pump that can rotate forward and backward; the power device for the third cleaning liquid is an external air source; the pipeline network includes: a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve, a fifty-first three-way valve, a fifty-second three-way valve, a sixth three-way valve, a seventy-first three-way valve, a seventy-second valve, an eighth three-way valve, the fifty-first three-way valve and the fifty-second three-way valve are linked, and the seventy-first three-way valve and the seventy-second valve are linked; the first interface of the first three-way valve, the second joint, and the first interface of the first pump are connected through the second three-way valve; the third interface of the first three-way valve is used to connect to an external air source, and the second interface of the first three-way valve is open; the second interface of the first pump, the first interface of the first box body, and the first interface of the second box body are connected through the fifty-second three-way valve, and the first interface of the fourth three-way valve, the first interface of the sixth three-way valve, and the first interface of the second pump are connected through the fifty-first three-way valve; the second interface of the fourth three-way valve is connected to the second interface of the first box body, and the third interface of the fourth three-way valve is connected to the external air source; the second interface of the sixth three-way valve is connected to the second interface of the second box body, and the third interface of the sixth three-way valve is connected to the external air source; the second interface of the second pump, the first interface of the seventy-first three-way valve, and the first joint are connected through the third three-way valve; the external air source, the third interface of the seventy-first three-way valve, and the first interface of the third box body are connected through the eighth three-way valve; the second interface of the seventy-first three-way valve is open; the seventy-second valve is used to connect the external air source and the second interface of the third box body.

[0009] Optionally, the seventy-second valve is a three-way valve, the first interface of the seventy-second valve is connected to the second interface of the third box body, the second interface of the seventy-second valve is closed, and the third interface of the seventy-second valve is connected to the external air source.

[0010] Optionally, the first joint is a spray head that rotates and sprays driven by fluid.

[0011] Optionally, it further includes an exhaust gas treatment box, and the second interface of the seventy-first three-way valve and the second interface of the first three-way valve are both connected to the exhaust gas treatment box.

[0012] The present invention also provides a method for cleaning a hot melt adhesive coating device, including:

[0013] S101, connecting the first joint of the automatic cleaning station of the hot melt adhesive coating device to the glue tank of the hot melt adhesive coating device, and connecting the second joint to the coating head of the hot melt adhesive coating device;

[0014] S102. Open the reverse path of the external air source and the hot melt adhesive coating equipment, and perform reverse flushing on the hot melt adhesive coating equipment;

[0015] S103. Open the circulation loop of the first box body, the hot melt adhesive coating equipment and the power device; heat the first cleaning liquid to the first preset temperature, and perform reverse flushing and forward cleaning;

[0016] S104. Open the forward path of the external air source, the power device, the hot melt adhesive coating equipment and the first box body, and perform forward flushing with the external air source;

[0017] S105. Open the circulation loop of the second box body, the hot melt adhesive coating equipment and the power device; heat the second cleaning liquid to the second preset temperature, and perform reverse cleaning and forward cleaning;

[0018] S106. Open the forward path of the external air source, the power device, the second box body and the hot melt adhesive coating equipment, and perform forward flushing with the external air source;

[0019] S107. Open the forward path of the power device, the third box body and the hot melt adhesive coating equipment, and perform forward cleaning with the third cleaning liquid;

[0020] S108. Open the forward path of the external air source and the hot melt adhesive coating equipment, and perform forward flushing; Steps S107 and S108 are alternately executed several times;

[0021] S109. Open the reverse path of the external air source and the hot melt adhesive coating equipment, and perform reverse flushing on the hot melt adhesive coating equipment;

[0022] Wherein, the forward path is the path flowing from the glue tank to the glue applicator head, and the reverse path is the path flowing from the glue applicator head to the glue tank.

[0023] Optionally, the step S102 specifically includes: energizing the first three-way valve to enable the external air source to perform reverse flushing on the hot melt adhesive coating equipment;

[0024] The step S103 specifically includes: energizing the second three-way valve and the third three-way valve; controlling both the first pump and the second pump to rotate in the reverse direction so that the first cleaning liquid flows in the reverse direction for cleaning; controlling the first pump and the second pump to rotate in the forward direction so that the first cleaning liquid flows in the forward direction for cleaning;

[0025] The step S104 specifically includes: energizing the second three-way valve, the third three-way valve and the fourth three-way valve, and controlling both the first pump and the second pump to rotate in the forward direction to enable the external air source to perform forward flushing;

[0026] The specific steps of step S105 include: energizing the second three-way valve, the third three-way valve, the fifty-first three-way valve, and the fifty-second three-way valve, and controlling both the first pump and the second pump to rotate in the reverse direction, so that the second cleaning liquid flows in the reverse direction for cleaning; controlling both the first pump and the second pump to rotate in the forward direction, so that the second cleaning liquid flows in the forward direction for cleaning;

[0027] The specific steps of step S106 include energizing the second three-way valve, the third three-way valve, the fifty-first three-way valve, the fifty-second three-way valve, and the sixth three-way valve, and controlling both the first pump and the second pump to rotate in the forward direction to perform forward flushing with an external air source;

[0028] The specific steps of step S107 include: energizing the seventy-first three-way valve and the seventy-second valve, so that the external air source drives the third cleaning liquid to perform forward cleaning;

[0029] The specific steps of step S108 include: energizing the seventy-first three-way valve, the seventy-second valve, and the eighth three-way valve, so that the external air source performs forward flushing;

[0030] The specific steps of step S109 include: energizing the first three-way valve, so that the external air source performs reverse flushing.

[0031] In the technical solution of the present invention, by providing a control system, a second connector for connecting to the glue applicator head of the hot melt adhesive coating equipment, a first connector for connecting to the glue tank of the hot melt adhesive coating equipment, a first box body for containing the first cleaning liquid, a second box body for containing the second cleaning liquid, a third box body for containing the third cleaning liquid, a power device for providing power for the fluid flow, and a pipeline network for connecting the external air source, the first connector, the second connector, the first box body, the second box body, the third box body, and the power device. The pipeline network can be set to the required path through the control system, and the hot melt adhesive coating equipment can be automatically cleaned multiple times. There is no need to disassemble the glue applicator head and the glue pump, and manually brush each component, improving the cleaning efficiency and reducing the labor consumption. Brief Description of the Drawings

[0032] Figure 1 It is a schematic diagram of an automatic cleaning station for a hot melt adhesive coating equipment.

[0033] In the figure, 1 is the first three-way valve; 2 is the second three-way valve; 3 is the third three-way valve; 4 is the fourth three-way valve; 6 is the sixth three-way valve; 8 is the eighth three-way valve; 9 is the first box body; 10 is the second box body; 11 is the third box body; 12 is the waste liquid tank; 13 is the first joint; 14 is the second joint; 15 is the first pump; 16 is the second pump; 51 is the fifty-first three-way valve; 52 is the fifty-second three-way valve; 71 is the seventy-first three-way valve; 72 is the seventy-second valve; 100 is the hot melt adhesive coating device; 101 is the glue tank; 102 is the coating head; 103 is the coating pump; 104 is the glue conveying pipe. Detailed implementation manners

[0034] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present invention. On the contrary, they are merely examples of devices or methods consistent with some aspects of the present invention.

[0035] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope protected by the present invention.

[0036] Hereinafter, the embodiments will be described with reference to the drawings. In addition, the embodiments shown below do not impose any limitation on the content of the invention described in the claims. Additionally, all the content of the configurations shown in the following embodiments is not necessarily essential for the solution of the invention described in the claims.

[0037] See Figure 1, the present invention provides an automatic cleaning station for a hot melt adhesive coating device, comprising: a control system, and the valves in the pipeline network are solenoid valves communicatively connected to the control system. When the power device does not include an external air source, for example, when the power device is a pump, the power device is communicatively connected to the control system, and the control system is used to control the operation of the power device and the opening and closing of each valve in the pipeline network to form a required passage. The second joint 14 is used to connect to the coating head 102 of the hot melt adhesive coating device 100; the first joint 13 is used to connect to the glue tank 101; the first box body 9 is used to hold the first cleaning liquid; the second box body 10 is used to hold the second cleaning liquid; heating devices are provided on both the first box body 9 and the second box body 10; the third box body 11 is used to hold the third cleaning liquid; the power device is used to provide power for the fluid flow; the pipeline network is used to connect the first joint 13, the second joint 14, the power device, the first box body 9, the second box body 10, the third box body 11, and is used to connect to an external air source, so as to form a required passage after connecting to the hot melt adhesive coating device 100. Under the control of the control system, the pipeline network can respectively form the following passages: a forward passage and a reverse passage formed by the external air source and the hot melt adhesive coating device 100; the forward passage refers to the passage flowing from the glue tank 101 to the coating head 102; the reverse passage refers to the passage flowing from the coating head 102 to the glue tank 101. A circulation loop is formed by the first box body 9, the hot melt adhesive coating device 100 and the power device; a forward passage formed by the external air source, the power device, the hot melt adhesive coating device 100 and the first box body 9; a circulation loop formed by the second box body 10, the hot melt adhesive coating device 100 and the power device; a forward passage formed by the external air source, the power device, the second box body 10 and the hot melt adhesive coating device 100; a forward passage formed by the power device, the third box body 11 and the hot melt adhesive coating device 100. Among them, there can be one or more external air sources, which can be the same air source or different air sources. For example, when the external air source forms a reverse passage with the hot melt adhesive coating device, the pressure of this external air source can be relatively large, and the pressure of other external air sources can be relatively small.

[0038] When this automatic cleaning station is performing cleaning, refer to Figure 1 , it only needs to connect the second joint 14 to the coating head 102, connect the first joint 13 to the glue tank 101, and then connect the automatic cleaning station to an external air source. By forming a required passage through the control system, the hot melt adhesive coating device 100 is rinsed successively with the first cleaning liquid, the second cleaning liquid and the third cleaning liquid, and the hot melt adhesive coating device 100 is blown with the external air source. There is no need to disassemble the coating head 102, disassemble the coating pump 103, and remove the glue delivery pipe 104, and manually brush each part, etc. It reduces the disassembly and assembly time, improves the cleaning efficiency, and saves manpower and material resources.

[0039] Optionally, the power devices for the first cleaning liquid, the second cleaning liquid, and the third cleaning liquid may all be pumps, specifically gear pumps. Alternatively, the power devices for the first cleaning liquid and the second cleaning liquid are pumps, and the power device for the third cleaning liquid is an external air source.

[0040] Optionally, the first cleaning liquid is paraffin or edible oil, the second cleaning liquid is a degreaser, and the third cleaning liquid is water.

[0041] Optionally, referring to Figure 1 , the power devices for the first cleaning liquid and the second cleaning liquid include a first pump 15 and a second pump 16 that can rotate forward and backward; the power device for the third cleaning liquid is an external air source. The pipeline network includes pipes and valves, specifically including: a first three-way valve 1, a second three-way valve 2, a third three-way valve 3, a fourth three-way valve 4, a fifty-first three-way valve 51, a fifty-second three-way valve 52, a sixth three-way valve 6, a seventy-first three-way valve 71, a seventy-second valve 72, an eighth three-way valve 8. The fifty-first three-way valve 51 and the fifty-second three-way valve 52 are linked, and the seventy-first three-way valve 71 and the seventy-second valve 72 are linked. The first interface of the first three-way valve 1, the second joint 14, and the first interface of the first pump 15 are connected through the second three-way valve 2; the third interface of the first three-way valve 1 is used to connect to an external air source, and the second interface of the first three-way valve 1 is open; the second interface of the first pump 15, the first interface of the first box 9, and the first interface of the second box 10 are connected through the fifty-second three-way valve 52. The first interface of the fourth three-way valve 4, the first interface of the sixth three-way valve 6, and the first interface of the second pump 16 are connected through the fifty-first three-way valve 51; the second interface of the fourth three-way valve 4 is connected to the second interface of the first box 9, and the third interface of the fourth three-way valve 4 is connected to an external air source; the second interface of the sixth three-way valve 6 is connected to the second interface of the second box 10, and the third interface of the sixth three-way valve 6 is connected to an external air source; the second interface of the second pump 16, the first interface of the seventy-first three-way valve 71, and the first joint 13 are connected through the third three-way valve 3; the external air source, the third interface of the seventy-first three-way valve 71, and the first interface of the third box 11 are connected through the eighth three-way valve 8; the second interface of the seventy-first three-way valve 71 is open; the seventy-second valve 72 is used to connect the external air source and the second interface of the third box 11.

[0042] Optionally, the seventy-second valve 72 is a three-way valve. The first interface of the seventy-second valve 72 is connected to the second interface of the third box 11, the second interface of the seventy-second valve is closed, and the third interface of the seventy-second valve is connected to an external air source.

[0043] Thus, referring to Figure 1When the three-way valve in the figure is not powered, the first interface and the second interface are connected. That is, of the two ports corresponding to the broken line drawn in the three-way valve, the middle one is the first interface and the other one is the second interface. The port without the broken line is the third interface.

[0044] When the first three-way valve 1 is energized, a first passage is formed: the external gas source passes through the first three-way valve 1, the second three-way valve 2, the second connector 14, the glue head 102, the glue delivery pipe 104, the glue pump 103, the glue tank 101, the first connector 13, the third three-way valve 3, and the seventy-first three-way valve 71 in sequence, and is discharged from the second interface of the seventy-first three-way valve 71, forming a reverse passage.

[0045] When the second and third three-way valves 2 and 3 are energized, a second path is formed, which serves as a circulation loop. When the first and second pumps 15 and 16 rotate in reverse, the first cleaning liquid in the first tank 9 flows out of the first port, sequentially passing through the fifty-second three-way valve 52, the first pump 15, the second three-way valve 2, the second connector 14, the glue head 102, the glue delivery hose 104, the glue pump 103, the glue tank 101, the first connector 13, the third three-way valve 3, the second pump 16, the fifty-first three-way valve 51, and the fourth three-way valve 4, before flowing back to the first tank 9 through the second port, performing reverse cleaning of the hot melt adhesive coating equipment. Similarly, when the first and second pumps 15 and 16 rotate forward, the first cleaning liquid flows out of the second port and finally flows back to the first tank 9 through the first port, performing forward cleaning of the hot melt adhesive coating equipment.

[0046] When power is supplied to the second, third, and fourth three-way valves 2, 3, and 4, a third path is formed. The first and second pumps 15, 16 rotate forward, forming a forward path. The external air source passes through the fourth three-way valve 4, the fifty-first three-way valve 51, the second pump 16, the third three-way valve 3, the first connector 13, the glue tank 101, the glue pump 103, the glue delivery hose 104, the glue head 102, the second connector 14, the second three-way valve 2, the first pump 15, the fifty-second three-way valve 52, and finally enters the first housing 9 through the first interface. It should be noted that the first housing 9 is provided with an exhaust port.

[0047] When the second three-way valve 2, the third three-way valve 3, the fifty-first three-way valve 51, and the fifty-second three-way valve 52 are energized, a fourth passage is formed, and the fourth passage is a circulation loop. When the first pump 15 and the second pump 16 reverse, the first cleaning liquid in the second casing 10 flows out from the first interface, successively passes through the fifty-second three-way valve 52, the first pump 15, the second three-way valve 2, the second joint 14, the glue application head 102, the glue delivery pipe 104, the glue application pump 103, the glue tank 101, the first joint 13, the third three-way valve 3, the second pump 16, the fifty-first three-way valve 51, and the sixth three-way valve 6, and then flows back to the second casing 10 through the second interface to perform reverse cleaning on the hot melt adhesive application device. Similarly, when the first pump 15 and the second pump 16 rotate forward, the first cleaning liquid flows out from the second interface and finally flows back to the second casing 10 through the first interface to perform forward cleaning on the hot melt adhesive application device.

[0048] When the second three-way valve 2, the third three-way valve 3, the fifty-first three-way valve 51, the fifty-second three-way valve 52, and the sixth three-way valve 6 are energized, a fifth passage is formed. When the first pump 15 and the second pump 16 rotate forward, a forward passage is formed. The external air source successively passes through the sixth three-way valve 6, the fifty-first three-way valve 51, the second pump 16, the third three-way valve 3, the first joint 13, the glue tank 101, the glue application pump 103, the glue delivery pipe 104, the glue application head 102, the second joint 14, the second three-way valve 2, the first pump 15, the fifty-second three-way valve 52, and enters the second casing 10 through the first interface. It should be noted that an exhaust port is provided on the second casing 10.

[0049] When the seventy-first three-way valve 71 and the seventy-second valve 72 are energized, a sixth passage is formed. The sixth passage is a forward passage. The external air source passes through the seventy-second valve 72 and enters the third casing 11 from the second interface, pressing out the third cleaning liquid in the third casing 11 from the second interface. The third cleaning liquid successively passes through the eighth three-way valve 8, the seventy-first three-way valve 71, the third three-way valve 3, the third three-way valve 3, the first joint 13, the glue tank 101, the glue application pump 103, the glue delivery pipe 104, the glue application head 102, the second joint 14, the second three-way valve 2, and the first three-way valve 1, and flows out from the second interface of the first three-way valve 1, and specifically can flow into the waste liquid tank 12.

[0050] When the seventy-first three-way valve 71, the seventy-second valve 72, and the eighth three-way valve 8 are energized, a seventh passage is formed. The seventh passage is a forward passage. The external air source successively passes through the eighth three-way valve 8, the seventy-first three-way valve 71, the third three-way valve 3, the third three-way valve 3, the first joint 13, the glue tank 101, the glue application pump 103, the glue delivery pipe 104, the glue application head 102, the second joint 14, the second three-way valve 2, and the first three-way valve 1, and flows out from the second interface of the first three-way valve 1.

[0051] Optionally, the first connector 13 is a spray head that rotates and sprays driven by a fluid. The first connector 13 is used to rinse the glue tank 101. The first connector 13 is set as a rotatable spray head, which can rinse the glue tank 101 more thoroughly.

[0052] Optionally, it further includes an exhaust gas treatment tank. The second interface of the seventy-first three-way valve 71 and the second interface of the first three-way valve 1 are both connected to the exhaust gas treatment tank. In this way, when performing reverse flushing, the exhaust gas flows into the exhaust gas treatment tank through the second interface of the seventy-first three-way valve 71 for treatment. When performing forward flushing, the exhaust gas flows into the exhaust gas treatment tank through the second interface of the first three-way valve 1 for treatment.

[0053] Optionally, it further includes a waste liquid tank. The second interface of the first three-way valve 1 is connected to the waste liquid tank 12. In this way, when using water for forward cleaning, the wastewater can be discharged into the waste liquid tank 12 through the first three-way valve 1.

[0054] The present invention also provides a method for cleaning a hot melt adhesive coating device, including:

[0055] S101, connect the first connector 13 of the automatic cleaning station of the hot melt adhesive coating device to the glue tank 101 of the hot melt adhesive coating device 100, and connect the second connector 14 to the coating head 102 of the hot melt adhesive coating device 100.

[0056] S102, turn on the external air source and the reverse path of the hot melt adhesive coating device 100, and perform reverse flushing on the hot melt adhesive coating device. Among them, the forward path is the path from the glue tank 101 to the coating head 102, and the reverse path is the path from the coating head 102 to the glue tank 101.

[0057] At this time, the colloid remaining in the coating head 102, the glue conveying pipe 104 and the glue pump 103 can be blown back into the glue tank 101. At this time, it is necessary to control the glue pump 103 to rotate in reverse, and at the same time adjust the glue pump 103 appropriately so that there is a gap between the gear of the glue pump 103 and the side wall to allow the cleaning liquid to pass through. When performing cleaning in other steps, it is also necessary to control the glue pump 103 to rotate forward or reverse accordingly.

[0058] S103, turn on the circulation loop of the first box body, the hot melt adhesive coating device and the power device; heat the first cleaning liquid to the first preset temperature, and perform reverse flushing and forward cleaning.

[0059] At this time, the first cleaning liquid can be used for reverse flushing. When the first cleaning liquid is paraffin, the first preset temperature can be 140 - 160 °C, preferably 150 °C, that is, heating the paraffin to 150 °C to perform reverse flushing on the hot melt adhesive coating equipment 100. It should be noted that during this process, the paraffin flows out from the first box body 9. When it flows to the glue tank 101, the paraffin will gradually fill the glue tank 101, then flow out to the first joint 13, and then flow back to the first box body 9. During this process, the colloid will dissolve into the paraffin. After reverse flushing, forward flushing is carried out.

[0060] S104, Open the forward passage of the external air source, power device, hot melt adhesive coating equipment and the first box body, and use the external air source for forward flushing.

[0061] After flushing with the first cleaning liquid, it can be blown with an external air source to blow the first cleaning liquid remaining in the pipeline network and the hot melt adhesive coating equipment back into the first box body 9.

[0062] S105, Open the circulation loop of the second box body, hot melt adhesive coating equipment, and power device; heat the second cleaning liquid to the second preset temperature for reverse cleaning and forward cleaning.

[0063] At this time, the second cleaning liquid can be used for forward and reverse flushing. The second cleaning liquid can be a degreaser, and the second preset temperature can be 65 - 85 °C. First, perform reverse flushing, and then perform forward flushing.

[0064] S106, Open the forward passage of the external air source, power device, second box body, and hot melt adhesive coating equipment, and use the external air source for forward flushing.

[0065] After cleaning with the second cleaning liquid, it can be blown with an external air source to blow the second cleaning liquid remaining in the pipeline network and the hot melt adhesive coating equipment into the second box body 10.

[0066] S107, Open the forward passage of the power device, third box body, and hot melt adhesive coating equipment, and perform forward cleaning with the third cleaning liquid.

[0067] S108, Open the forward passage of the external air source and the hot melt adhesive coating equipment for forward flushing; Steps S107 and S108 are alternately executed several times.

[0068] At this time, that is, alternately flushing with the third cleaning liquid and the external air source. The third cleaning liquid can be water. That is, first flush with water for a period of time, and then blow with air for a period of time, and alternate several times.

[0069] S109, Open the reverse passage of the external air source and the hot melt adhesive coating equipment to perform reverse flushing on the hot melt adhesive coating equipment.

[0070] Finally, use an external air source to perform a reverse flushing on the hot melt adhesive coating equipment once again to thoroughly flush the hot melt adhesive coating equipment clean.

[0071] Optionally, refer to Figure 1 , S102, the control system first energizes the first three-way valve 1, and the external air source sequentially passes through the first three-way valve 1, the second three-way valve 2, the second joint 14, the coating head 102, the glue delivery pipe 104, the glue pump 103, the glue tank 101, the first joint 13, the third three-way valve 3, the seventy-first three-way valve 71, and discharges from the second interface of the seventy-first three-way valve 71. Blow the colloid remaining in the coating head 102, the glue delivery pipe 104, and the glue pump 103 back into the glue tank 101, and the waste gas is discharged through the seventy-first three-way valve 71. This process can last for 300S. At this time, if there is more colloid remaining in the glue tank 101, the colloid can be taken out.

[0072] S103, energize the second three-way valve 2 and the third three-way valve 3. First, control the first pump 15 and the second pump 16 to rotate in reverse, so that the first cleaning liquid in the first box body 9 flows out from the first interface, and sequentially flows through the fifty-second three-way valve 52, the first pump 15, the second three-way valve 2, the second joint 14, the coating head 102, the glue delivery pipe 104, the glue pump 103, the glue tank 101, the first joint 13, the third three-way valve 3, the second pump 16, the fifty-first three-way valve 51, and the fourth three-way valve 4, and then flows back to the first box body 9 from the second interface to perform reverse cleaning on the hot melt adhesive coating equipment. This process can last for 1000S. During this process, the first pump 15 and the second pump 16 can be turned off 10 seconds in advance to prevent the reverse rotation of the pumps to be performed later from causing a water hammer effect. Then control the first pump 15 and the second pump 16 to rotate forward, and the first cleaning liquid flows out from the second interface and finally flows back to the first box body 9 from the first interface to perform forward cleaning on the hot melt adhesive coating equipment. This process can last for 1000S, and the first pump and the second 16 are turned off 10S in advance.

[0073] S104, energize the second three-way valve 2, the third three-way valve 3, and the fourth three-way valve 4. Control the first pump 15 and the second pump 16 to rotate forward. The external air source sequentially passes through the fourth three-way valve 4, the fifty-first three-way valve 51, the second pump 16, the third three-way valve 3, the first joint 13, the glue tank 101, the glue pump 103, the glue delivery pipe 104, the coating head 102, the second joint 14, the second three-way valve 2, the first pump 15, and the fifty-second three-way valve 52, and blows the remaining first cleaning liquid back to the first box body 9 through the first interface.

[0074] S105, energize the second three-way valve 2, the third three-way valve 3, the fifty-first three-way valve 51, and the fifty-second three-way valve 52. Control the first pump 15 and the second pump 16 to reverse. The second cleaning liquid in the second box body 10 flows out from the first interface, successively passes through the fifty-second three-way valve 52, the first pump 15, the second three-way valve 2, the second joint 14, the glue applicator head 102, the glue delivery pipe 104, the glue application pump 103, the glue tank 101, the first joint 13, the third three-way valve 3, the second pump 16, the fifty-first three-way valve 51, and the sixth three-way valve 6, and then flows back to the second box body 10 from the second interface to perform reverse cleaning on the hot melt adhesive application device. This process can last for 600S, and the first pump 15 and the second pump 16 are turned off 10S in advance. Then control the first pump 15 and the second pump 16 to rotate forward. The second cleaning liquid then flows out from the second interface of the second box body 10 and finally flows back to the second box body 10 from the first interface of the second box body 10 to perform forward cleaning on the hot melt adhesive application device.

[0075] S106, energize the second three-way valve 2, the third three-way valve 3, the fifty-first three-way valve 51, the fifty-second three-way valve 52, and the sixth three-way valve 6. Control the first pump 15 and the second pump 16 to rotate forward. The external air source successively passes through the sixth three-way valve 6, the fifty-first three-way valve 51, the second pump 16, the third three-way valve 3, the first joint 13, the glue tank 101, the glue application pump 103, the glue delivery pipe 104, the glue applicator head 102, the second joint 14, the second three-way valve 2, the first pump 15, and the fifty-second three-way valve 52, and finally blows the second cleaning liquid back to the second box body 10 through the first interface. This process can last for 600S.

[0076] S107, energize the seventy-first three-way valve 71 and the seventy-second valve 72. The external air source passes through the seventy-second valve 72 and enters the third box body 11 from the second interface, presses out the third cleaning liquid in the third box body 11 from the second interface. The third cleaning liquid successively passes through the eighth three-way valve 8, the seventy-first three-way valve 71, the third three-way valve 3, the third three-way valve 3, the first joint 13, the glue tank 101, the glue application pump 103, the glue delivery pipe 104, the glue applicator head 102, the second joint 14, the second three-way valve 2, and the first three-way valve 1, and flows out from the second interface of the first three-way valve 1. Specifically, it can flow into the waste liquid tank 12 to perform forward flushing with the third cleaning liquid. This process can last for 10S. The third cleaning liquid can be water.

[0077] S108. Energize the 71st three-way valve 71, the 72nd valve 72, and the 8th three-way valve 8. The external air source sequentially flows through the 8th three-way valve 8, the 71st three-way valve 71, the 3rd three-way valve 3, the 3rd three-way valve 3, the first joint 13, the glue tank 101, the glue application pump 103, the glue delivery pipe 104, the glue application head 102, the second joint 14, the 2nd three-way valve 2, and the 1st three-way valve 1, and flows out from the second interface of the 1st three-way valve 1 for forward flushing. This process can last for 30S. Then, steps S107 and S108 are alternately performed. That is, first perform 10S of water flushing, and then perform 30S of air flushing.

[0078] S109. The control system energizes the 1st three-way valve 1. The external air source sequentially passes through the 1st three-way valve 1, the 2nd three-way valve 2, the second joint 14, the glue application head 102, the glue delivery pipe 104, the glue application pump 103, the glue tank 101, the first joint 13, the 3rd three-way valve 3, and the 71st three-way valve 71. The waste gas is discharged from the second interface of the 71st three-way valve 71 to flush the hot melt glue application equipment clean in the reverse direction. This process can last for 300S.

Claims

1. An automatic cleaning station for hot melt adhesive coating equipment, characterized in that, Including: A control system, a second joint for connecting to the glue applicator head of the hot melt adhesive coating equipment, a first joint for connecting to the glue tank of the hot melt adhesive coating equipment, a first box body for containing a first cleaning liquid, a second box body for containing a second cleaning liquid, a third box body for containing a third cleaning liquid, a power device for providing power for the fluid flow, and a pipeline network for connecting an external air source, the first joint, the second joint, the first box body, the second box body, the third box body and the power device; heating devices are arranged on both the first box body and the second box body; the pipeline network forms a forward path and a reverse path between the external air source and the hot melt adhesive coating equipment, and forms a circulation loop between the first box body, the hot melt adhesive coating equipment and the power device; forms a forward path between the external air source, the power device, the hot melt adhesive coating equipment and the first box body; forms a circulation loop between the second box body, the hot melt adhesive coating equipment and the power device; forms a forward path between the external air source, the power device, the second box body and the hot melt adhesive coating equipment; forms a forward path between the power device, the third box body and the hot melt adhesive coating equipment; the forward path is the path flowing from the glue tank to the glue applicator head, and the reverse path is the path flowing from the glue applicator head to the glue tank.

2. The automatic cleaning station for the hot melt adhesive coating equipment according to claim 1, characterized in that The power device for providing power for the first cleaning liquid, the second cleaning liquid and the third cleaning liquid is a pump; or, the power device for providing power for the first cleaning liquid and the second cleaning liquid is a pump, and the power device for providing power for the third cleaning liquid is an external air source.

3. The automatic cleaning station for the hot melt adhesive coating equipment according to claim 1, characterized in that, The first cleaning liquid is paraffin or edible oil, the second cleaning liquid is a degreaser, and the third cleaning liquid is water.

4. The automatic cleaning station for the hot melt adhesive coating equipment according to claim 2, characterized in that, The power devices for providing power to the first cleaning liquid and the second cleaning liquid include a first pump and a second pump that can rotate forward and backward; the power device for providing power to the third cleaning liquid is an external air source; the pipeline network includes: a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve, a fifty-first three-way valve, a fifty-second three-way valve, a sixth three-way valve, a seventy-first three-way valve, a seventy-second valve, an eighth three-way valve, the fifty-first three-way valve and the fifty-second three-way valve are linked, and the seventy-first three-way valve and the seventy-second valve are linked; the first interface of the first three-way valve, the second joint, and the first interface of the first pump are connected through the second three-way valve; the third interface of the first three-way valve is used to connect to an external air source, and the second interface of the first three-way valve is open; the second interface of the first pump, the first interface of the first box body, and the first interface of the second box body are connected through the fifty-second three-way valve, and the first interface of the fourth three-way valve, the first interface of the sixth three-way valve, and the first interface of the second pump are connected through the fifty-first three-way valve; the second interface of the fourth three-way valve is connected to the second interface of the first box body, and the third interface of the fourth three-way valve is connected to the external air source; the second interface of the sixth three-way valve is connected to the second interface of the second box body, and the third interface of the sixth three-way valve is connected to the external air source; the second interface of the second pump, the first interface of the seventy-first three-way valve, and the first joint are connected through the third three-way valve; the external air source, the third interface of the seventy-first three-way valve, and the first interface of the third box body are connected through the eighth three-way valve; the second interface of the seventy-first three-way valve is open; the seventy-second valve is used to connect the external air source and the second interface of the third box body.

5. The automatic cleaning station for a hot melt adhesive coating device according to claim 4, wherein the seventy-second valve is a three-way valve, the first interface of the seventy-second valve is connected to the second interface of the third box body, the second interface of the seventy-second valve is closed, and the third interface of the seventy-second valve is connected to the external air source.

6. The automatic cleaning station for the hot melt adhesive coating equipment according to claim 1, characterized in that, The first joint is a spray head that rotates and sprays driven by fluid.

7. The automatic cleaning station for a hot melt adhesive coating device according to claim 4, wherein It further includes an exhaust gas treatment box, and the second interface of the seventy-first three-way valve and the second interface of the first three-way valve are both connected to the exhaust gas treatment box.

8. A method for cleaning a hot melt adhesive coating device, characterized in that, It includes: S101, connecting the first joint of the automatic cleaning station of the hot melt adhesive coating device to the glue tank of the hot melt adhesive coating device, and connecting the second joint to the coating head of the hot melt adhesive coating device; S102, turning on the external air source and the reverse path of the hot melt adhesive coating device to perform reverse flushing on the hot melt adhesive coating device; S103, turning on the circulation loop of the first box body, the hot melt adhesive coating device, and the power device; heating the first cleaning liquid to a first preset temperature to perform reverse flushing and forward cleaning; S104, turning on the forward path of the external air source, the power device, the hot melt adhesive coating device, and the first box body to perform forward flushing with the external air source; S105, activate the circulation loop of the second box body, the hot melt adhesive coating equipment, and the power device; heat the second cleaning liquid to the second preset temperature, and perform reverse cleaning and forward cleaning; S106, activate the forward path of the external air source, the power device, the second box body, and the hot melt adhesive coating equipment, and perform forward blowing with the external air source; S107, activate the forward path of the power device, the third box body, and the hot melt adhesive coating equipment, and perform forward cleaning with the third cleaning liquid; S108, activate the forward path of the external air source and the hot melt adhesive coating equipment, and perform forward blowing; Steps S107 and S108 are alternately executed several times; S109, activate the reverse path of the external air source and the hot melt adhesive coating equipment, and perform reverse blowing on the hot melt adhesive coating equipment; Among them, the forward path is the path flowing from the glue tank to the glue applicator head, and the reverse path is the path flowing from the glue applicator head to the glue tank.

9. The method for cleaning a hot melt adhesive coating device according to claim 8, wherein, The step S102 specifically includes: energize the first three-way valve to enable the external air source to perform reverse blowing on the hot melt adhesive coating equipment; The step S103 specifically includes: energize the second three-way valve and the third three-way valve; control both the first pump and the second pump to rotate reversely to enable the first cleaning liquid to flow reversely for cleaning; control both the first pump and the second pump to rotate forward to enable the first cleaning liquid to flow forward for cleaning; The step S104 specifically includes: energize the second three-way valve, the third three-way valve, and the fourth three-way valve, and control both the first pump and the second pump to rotate forward to enable the external air source to perform forward blowing; The step S105 specifically includes: energize the second three-way valve, the third three-way valve, the fifty-first three-way valve, and the fifty-second three-way valve, and control both the first pump and the second pump to rotate reversely to enable the second cleaning liquid to flow reversely for cleaning; control both the first pump and the second pump to rotate forward to enable the second cleaning liquid to flow forward for cleaning; The step S106 specifically includes energizing the second three-way valve, the third three-way valve, the fifty-first three-way valve, the fifty-second three-way valve, and the sixth three-way valve, and controlling both the first pump and the second pump to rotate forward to enable the external air source to perform forward blowing; The step S107 specifically includes: energize the seventy-first three-way valve and the seventy-second valve to enable the external air source to drive the third cleaning liquid for forward cleaning; The step S108 specifically includes: energize the seventy-first three-way valve, the seventy-second valve, and the eighth three-way valve to enable the external air source to perform forward blowing; The step S109 specifically includes: energize the first three-way valve to enable the external air source to perform reverse blowing.

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