Coating die head cleaning device

Abstract

The present invention belongs to the technical field of coating apparatuses, and specifically relates to a coating die head cleaning device. The cleaning device comprises a lower die head, wherein an upper die head is fitted on one side of the upper end of the lower die head; a solvent flow channel and a plurality of liquid inlets are provided inside the upper die head, and the solvent flow channel is in communication with each of the plurality of liquid inlets; a plurality of T-shaped blocks are fitted inside the solvent flow channel; and a liquid outlet is provided in one end of the upper die head. In the present invention, after a sealing cover is attached to one side of the upper die head, the sealing cover can be tightly attached to the upper die head by means of delivering compressed air to a vacuum generator, a cleaning solvent is delivered to the interior of the solvent flow channel by means of a diaphragm pump, and the interior of the solvent flow channel and the surfaces of the T-shaped blocks are cleaned by means of the cleaning solvent. In addition, the gravity of a filter element and impurities on the surface thereof is measured by means of tension sensors, and when the gravity of the filter element and the impurities on the surface thereof is greater than a set gravity threshold value, an operator can clean the filter element promptly.

Description

Die cleaning device for coating TECHNICAL FIELD

[0001] The present application belongs to the technical field of coating equipment, and particularly relates to a die cleaning device for coating. BACKGROUND

[0002] In modern industrial production, coating technology is widely used in the processing and manufacturing of various materials, such as paper, film, textiles, etc. The die head used in the coating process is a key component to achieve uniform coating. However, during long-term operation, coating residues, dust and other impurities will accumulate on the die head, which will affect the coating quality and cause product defects such as stripes, bubbles, uneven coating, and T-blocks that cannot be adjusted due to residual slurry solidification. Therefore, regular cleaning of the die head is crucial to ensure coating quality and production efficiency.

[0003] Currently, there are various die cleaning methods on the market, including manual cleaning, ultrasonic cleaning, etc. However, each of these methods has its own shortcomings:

[0004] 1. Manual cleaning is inefficient, time-consuming and labor-intensive, and it is difficult to completely remove dirt inside the die head, resulting in poor cleaning effect;

[0005] 2. Although ultrasonic cleaning has good effect, the equipment cost is high, and the die head needs to be disassembled and assembled, which is complex and not suitable for frequent use;

[0006] Based on the above problems, the present application proposes a die cleaning device for coating to improve the above problems. SUMMARY

[0007] The purpose of the present application is to provide a die cleaning device for coating, which can attach a sealing cover to one side of the upper die head, then send compressed air to the vacuum generator to make the sealing cover tightly attached to the upper die head, send cleaning solvent to the inside of the solvent flow channel through the diaphragm pump, clean the inside of the solvent flow channel and the surface of the T-shaped block with the cleaning solvent, and measure the weight of the filter element and its surface impurities through the tension sensor. When the weight of the filter element and its surface impurities is greater than the set weight threshold, the worker can clean the filter element in time.

[0008] The technical solutions adopted by the present application are as follows:

[0009] The utility model provides a coating die cleaning device, including lower die, one side of upper die is equipped with on the lower die upper end, the inside of upper die is equipped with solvent flow channel and a plurality of liquid inlet, and the solvent flow channel and a plurality of liquid inlet are mutually through between, the inside of solvent flow channel is equipped with a plurality of T blocks, one end of upper die is equipped with liquid outlet, and the solvent flow channel and liquid outlet are mutually through, still include:

[0010] The cleaning part includes a sealing cover, a vacuum generator and a diaphragm pump. The sealing cover is detachably assembled on one side of the upper die. After the sealing cover and the upper die are attached, a sealed cleaning cavity is formed in the inside of the sealing cover. The sealing cover is adapted to the T-shaped block. The vacuum generator is fixed to the upper end of the sealing cover. A plurality of backflow sleeves are formed on the lower end of the sealing cover. The diaphragm pump is arranged on one end of the outside of the lower die. The diaphragm pump and the liquid inlet are connected by a cleaning hose.

[0011] The liquid storage part is arranged between the sealing cover and the diaphragm pump. The liquid storage part, the liquid outlet, the diaphragm pump and the backflow sleeve are connected by backflow hoses. The diaphragm pump, the cleaning hose, the liquid inlet, the solvent flow channel, the liquid outlet, the sealing cover, the backflow hose and the liquid storage part form a circulation path.

[0012] The inside of the sealing cover is a negative pressure space after compressed air is input to the input end of the vacuum generator.

[0013] In a preferred embodiment, a pressure regulating port is formed on the end of the upper die away from the liquid outlet. The pressure regulating port and the solvent flow channel are mutually through. A safety valve is fixed in the inside of the pressure regulating port.

[0014] In a preferred embodiment, a one-way valve is fixed in the inside of each of the plurality of liquid inlets. The cleaning hose is connected to the liquid inlet through the one-way valve.

[0015] In a preferred embodiment, a sealing ring is fixed on the end of the sealing cover close to the upper die. The material of the sealing ring is rubber.

[0016] In a preferred scheme, the liquid storage part comprises a liquid storage tank, a cover plate, a driving motor, a threaded rod, a partition plate, a cross arm, a plurality of tension sensors, a plurality of linkage rods and a filter element, the liquid storage tank is arranged at one end of the lower mold head, the cover plate is detachably fixed to the upper end of the liquid storage tank, the driving motor is fixed to the upper end of the cover plate, the threaded rod is fixed to the output end of the driving motor, and the threaded rod and the cover plate are rotationally connected, the partition plate is slidingly connected to the inside of the liquid storage tank, and the partition plate and the threaded rod are rotationally connected, the cross arm is threadedly connected to the outside of the threaded rod, a plurality of the tension sensors are respectively fixed to the lower ends of the two ends of the cross arm, a plurality of the linkage rods are respectively fixed to the lower ends of the plurality of tension sensors, and the linkage rods and the partition plate are slidingly connected, and the filter element is fixed to the lower ends of the plurality of linkage rods.

[0017] In a preferred scheme, the upper end of the outside of the liquid storage tank is provided with a backflow pipe, and the lower end of the outside of the liquid storage tank is provided with a liquid outlet pipe, and in the working state, the filter element is located between the backflow pipe and the liquid outlet pipe.

[0018] In a preferred scheme, the inside of the liquid storage tank is fixed with an annular boss, and the annular boss and the filter element are matched.

[0019] In a preferred scheme, the inner wall of the liquid storage tank is fixed with a guide rib, the guide rib and the partition plate are matched, and the partition plate and the liquid storage tank are slidingly connected through the guide rib.

[0020] The technical effects achieved by the present application are as follows:

[0021] After the sealing cover is attached to one side of the upper mold head, compressed air is delivered to the vacuum generator to make the sealing cover tightly attached to the upper mold head, the cleaning solvent is delivered to the inside of the solvent flow channel through the diaphragm pump, the inside of the solvent flow channel and the surface of the T-shaped block are cleaned by the cleaning solvent and backflow to the inside of the liquid storage part, and the remaining waste chips can be sucked out, thereby improving the cleaning effect and cleaning efficiency.

[0022] The driving motor drives the filter element and the impurities on the surface of the filter element to move, and the tension sensor measures the gravity of the filter element and the impurities on the surface of the filter element, when the gravity of the filter element and the impurities on the surface of the filter element is greater than the set gravity threshold, the filter element can be cleaned in time by the worker, thereby guaranteeing the filtering effect and filtering efficiency of the filter element. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a structural schematic diagram of the whole application;

[0024] Fig. 2 is a front view of the whole structure of the application;

[0025] Fig. 3 is a sectional view of the whole structure of the application;

[0026] Fig. 4 is a partial enlarged view of the present application at A in Fig. 3;

[0027] Fig. 5 is a schematic view of the structure of the lower die and the upper die of the present application;

[0028] Fig. 6 is a rear view of the lower die and the upper die of the present application;

[0029] Fig. 7 is a partial structure sectional view of the upper die of the present application;

[0030] Fig. 8 is a schematic view of the structure of the liquid storage part of the present application;

[0031] Fig. 9 is a schematic view of the internal structure of the liquid storage part of the present application;

[0032] Fig. 10 is a structure sectional view of the liquid storage part of the present application;

[0033] Fig. 11 is a partial enlarged view of the present application at B in Fig. 10.

[0034] In the drawings, the components represented by the respective reference numerals are listed as follows: 10, lower die; 11, upper die; 12, solvent flow channel; 13, liquid inlet; 14, T-shaped block; 15, liquid outlet; 16, pressure regulating port; 17, safety valve; 18, one-way valve; 20, cleaning part; 21, sealing cover; 22, vacuum generator; 23, diaphragm pump; 24, return flow sleeve; 25, cleaning hose; 26, return flow hose; 27, sealing ring; 30, liquid storage part; 301, return flow pipe; 302, liquid outlet pipe; 303, annular boss; 304, guide rib; 31, liquid storage tank; 32, cover plate; 33, driving motor; 34, threaded rod; 35, partition plate; 36, cross arm; 37, tension sensor; 38, linkage rod; 39, filter element. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0036] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0037] Secondly, "one embodiment" or "embodiment" referred to herein means that a specific feature, structure or characteristic can be included in at least one implementation of the present application. "In a preferred embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.

[0038] Thirdly, the present application is described in detail in combination with the schematic diagram, in the detailed description of the embodiments of the present application, for the convenience of description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0039] Please refer to the first embodiment of the present application shown in the accompanying drawings 1 to 7, which provides a die cleaning device for coating, comprising a lower die 10, a upper die 11 assembled on one side of the upper end of the lower die 10, a solvent flow channel 12 and a plurality of liquid inlet 13 are opened in the inside of the upper die 11, and the solvent flow channel 12 and the plurality of liquid inlet 13 are mutually penetrated, a plurality of T-shaped blocks 14 are assembled in the inside of the solvent flow channel 12, a liquid outlet 15 is opened in one end of the upper die 11, and the solvent flow channel 12 and the liquid outlet 15 are mutually penetrated, further comprising:

[0040] The cleaning part 20 comprises a sealing cover 21, a vacuum generator 22 and a diaphragm pump 23, the sealing cover 21 is detachably assembled on one side of the upper die 11, after the sealing cover 21 and the upper die 11 are fitted, a sealed cleaning cavity is formed in the inside of the sealing cover 21, and the sealing cover 21 and the T-shaped block 14 are adapted, the vacuum generator 22 is fixed on the upper end of the sealing cover 21, a plurality of backflow sleeve 24 are opened on the lower end of the sealing cover 21, the diaphragm pump 23 is arranged on one end of the outside of the lower die 10, and the output end of the diaphragm pump 23 and the liquid inlet 13 are connected through the cleaning hose 25;

[0041] The liquid storage part 30 is arranged between the sealing cover 21 and the diaphragm pump 23, the liquid storage part 30 and the liquid outlet 15, the input end of the diaphragm pump 23 and the backflow hose 26 are connected, and the diaphragm pump 23, the cleaning hose 25, the liquid inlet 13, the solvent flow channel 12, the liquid outlet 15, the sealing cover 21, the backflow hose 26 and the liquid storage part 30 form a circulating passage;

[0042] Among them, when the sealing cover 21 and the upper die 11 are fitted, and the compressed air is input to the input end of the vacuum generator 22, the inside of the sealing cover 21 is a negative pressure space.

[0043] Here, there is also a gas pump module matched with the device, the input end of the vacuum generator 22 and the diaphragm pump 23 are connected through the gas pipe, and the gas pump module can deliver compressed air to the inside of the vacuum generator 22.

[0044] In this embodiment, when the dirt inside the solvent flow channel 12 and the inner surface of the T-shaped block 14 needs to be cleaned, the sealing cover 21 is attached to one side of the upper die head 11 corresponding to the T-shaped block 14, the air pump module is started, compressed air is sent to the vacuum generator 22 through the air pump module, so that the negative pressure space inside the sealing cover 21 is tightly attached to the surface of the upper die head 11, the cleaning solvent is injected into the inside of the liquid storage part 30, the diaphragm pump 23 is started, and the cleaning solvent inside the liquid storage part 30 is extracted through the diaphragm pump 23, so that the cleaning solvent flows into the inside of the solvent flow channel 12 through the diaphragm pump 23, the cleaning hose 25 and the liquid inlet 13 in turn, and the dirt inside the solvent flow channel 12 and the inner surface of the T-shaped block 14 is cleaned. The cleaned solvent flows to the return hose 26 through the liquid outlet 15 and the return sleeve 24, and then flows back to the inside of the liquid storage part 30 through the return hose 26. The returned cleaning solution is filtered by the liquid storage part 30 and flows to the diaphragm pump 23 again. In this process, the cleaning solvent can clean the dirt inside the solvent flow channel 12 and the inner surface of the T-shaped block 14. By sending compressed air to the inside of the vacuum generator 22 through the air pump module, the air pressure inside the sealing cover 21 can be reduced, and the waste residues between the T-shaped blocks 14 can be sucked out. During the cleaning process of the upper die head 11, the upper die head 11 does not need to be disassembled, the cleaning effect and efficiency are improved, the returned cleaning solvent is filtered by the liquid storage part 30 for recycling, the resource utilization rate is improved, and the maintenance cost is reduced.

[0045] It should be noted that the inner surface of the T-shaped block 14 refers to the surface attached to the solvent flow channel 12.

[0046] Secondly, referring to FIGS. 2 and 5, the end of the upper die head 11 away from the liquid outlet 15 is provided with a pressure regulating port 16, and the pressure regulating port 16 and the solvent flow channel 12 are mutually penetrated. The safety valve 17 is fixed inside the pressure regulating port 16. In the initial state, the safety valve 17 is in a closed state. When the pressure inside the cleaning cavity is greater than the set value of the safety valve 17, the safety valve 17 changes from the closed state to the open state to release the pressure inside the cleaning cavity. When the pressure inside the cleaning cavity is less than the set value of the safety valve 17, the safety valve 17 changes from the open state to the closed state.

[0047] Thirdly, referring to FIGS. 4 to 7, the inside of each liquid inlet 13 is fixed with a one-way valve 18, and the cleaning hose 25 is connected to the liquid inlet 13 through the one-way valve 18.

[0048] Here, the number of one-way valves 18 connected to the cleaning hose 25 is at least one, the liquid inlet 13 connected to the cleaning hose 25 is in a communication state, and the liquid inlet 13 not connected to the cleaning hose 25 is in a closed state.

[0049] In this embodiment, when the solvent flow channel 12 and the T-shaped block 14 are cleaned, the cleaning hose 25 and the one-way valves 18 are connected according to the cleaning requirements, the diaphragm pump 23 is started to deliver the cleaning solvent into the solvent flow channel 12, the cleaning solvent flows to the liquid outlet 15 and the return sleeve 24 along the solvent flow channel 12, the inside of the solvent flow channel 12 and the surface of the T-shaped block 14 are cleaned, and the liquid inlets 13 not connected with the cleaning hose 25 are in a closed state to avoid the cleaning solvent flowing out of the liquid inlets 13 in a non-connected state.

[0050] Secondly, referring to Fig. 4 again, the sealing cover 21 is fixed with a sealing ring 27 at one end close to the upper die head 11, and the sealing ring 27 is made of rubber.

[0051] In this embodiment, the sealing ring 27 can improve the sealing performance of the sealing cover 21, avoid the gas outside the sealing cover 21 flowing into the sealing cavity, and also avoid the cleaning solvent inside the sealing cover 21 flowing out.

[0052] Referring to Figs. 8-10 again, the liquid storage part 30 includes a liquid storage tank 31, a cover plate 32, a driving motor 33, a threaded rod 34, a partition plate 35, a cross arm 36, a plurality of tension sensors 37, a plurality of linkage rods 38, and a filter element 39. The liquid storage tank 31 is arranged at one end of the lower die head 10, the cover plate 32 is detachably fixed to the upper end of the liquid storage tank 31, the driving motor 33 is fixed to the upper end of the cover plate 32, the threaded rod 34 is fixed to the output end of the driving motor 33, the lower end of the threaded rod 34 extends into the inside of the liquid storage tank 31, and the threaded rod 34 and the cover plate 32 are rotationally connected through a sealing bearing, the partition plate 35 is slidingly connected to the inside of the liquid storage tank 31, and the partition plate 35 and the threaded rod 34 are rotationally connected through a sealing bearing, the cross arm 36 is threadedly connected to the outside of the threaded rod 34 and located at the upper end of the partition plate 35, the plurality of tension sensors 37 are respectively fixed to the lower ends of the two ends of the cross arm 36, the plurality of linkage rods 38 are respectively fixed to the lower ends of the plurality of tension sensors 37, and the linkage rods 38 and the partition plate 35 are slidingly connected in a clearance fit, and the filter element 39 is fixed to the lower ends of the plurality of linkage rods 38.

[0053] Here, a service terminal is also used with the device, and the service terminal and the threaded rod 34 and the service terminal and the tension sensor 37 are electrically connected through wires, the signals obtained by the tension sensor 37 can be transmitted to the service terminal, and the service terminal can be used to set the gravity threshold value and the forward starting time and reverse resetting time of the threaded rod 34.

[0054] Further, the threaded rod 34 is preferably a servo motor.

[0055] In this embodiment, the diaphragm pump 23 drives the cleaning solvent inside the liquid storage part 30 to clean the solvent flow channel 12 and the T-shaped block 14 through the circulating path, and then returns to the inside of the liquid storage tank 31 through the return hose 26. The returned cleaning solvent is filtered through the filter element 39, and the large particles of impurities are retained on the surface of the filter element 39. When the device has accumulated a long working time, the driving motor 33 is started, and the driving motor 33 drives the threaded rod 34 to rotate through the fixed connection of the driving motor 33 and the threaded rod 34. The threaded rod 34 drives the cross arm 36 to move upward through the threaded connection of the threaded rod 34 and the cross arm 36. Since the cross arm 36, the tension sensor 37, the linkage rod 38, and the linkage rod 38 and the filter element 39 are fixedly connected, the cross arm 36 drives the tension sensor 37, the linkage rod 38, and the filter element 39 to move synchronously. When the filter element 39 is separated from the surface of the cleaning solvent, the filter element 39 and the impurities accumulated on the surface thereof can be measured by the tension sensor 37. When the weight of the filter element 39 and the impurities on the surface thereof is greater than the gravity threshold, the service terminal can remind the worker to clean the impurities on the surface of the filter element 39. Finally, the driving motor 33 is reversely operated to reset the filter element 39. When the worker cleans the impurities on the surface of the filter element 39, the cover plate 32 is removed from the upper end of the liquid storage tank 31, and then the filter element 39 is removed, so that the impurities on the surface of the filter element 39 can be cleaned. Through the above scheme, the worker can clean the surface of the filter element 39 in time when too much impurities are accumulated on the surface of the filter element 39, so as to ensure the filtering effect and efficiency of the filter element 39.

[0056] Further, in order to improve the accuracy of the data, the filter element 39 is separated from the surface of the cleaning solvent and is drained, and then the weight of the filter element 39 and the impurities on the surface thereof is obtained by the tension sensor 37.

[0057] Please refer to FIGS. 8 to 10 again. The upper end of the outside of the liquid storage tank 31 is provided with a return pipe 301, and the lower end of the outside of the liquid storage tank 31 is provided with a liquid outlet pipe 302. In the working state, the filter element 39 is located between the return pipe 301 and the liquid outlet pipe 302.

[0058] In this embodiment, the filter element 39 is arranged between the return pipe 301 and the liquid outlet pipe 302, which can ensure that the filter element 39 can filter the returned cleaning solvent.

[0059] It should be noted that in the process of cleaning the inside of the solvent flow channel 12 and the surface of the T-shaped block 14, the driving motor 33 will not be started, and if the filter element 39 is separated from the cleaning solvent liquid level and located at the lower end of the reflux pipe 301, the reflux cleaning solvent in the flowing state will cause the tension sensor 37 to be unable to obtain accurate gravity data, and if the filter element 39 is separated from the cleaning agent solvent liquid level and located at the upper end of the reflux pipe 301, the filter element 39 cannot filter the reflux cleaning solvent.

[0060] Please refer to Figs. 10 and 11 again, the inside of the liquid storage tank 31 is fixed with an annular boss 303, and the annular boss 303 and the filter element 39 are matched, and the material of the annular boss 303 is rubber.

[0061] Here, in the working state, the filter element 39 and the annular boss 303 are closely attached.

[0062] In this embodiment, when the filter element 39 and the impurity gravity on the surface thereof are measured by the tension sensor 37, the filter element 39 and the annular boss 303 are separated, and the filter element 39 and the liquid storage tank 31 are in a clearance fit state, thereby avoiding the inaccurate data caused by the contact between the inner wall of the liquid storage tank 31 and the filter element 39.

[0063] Please refer to Figs. 9 and 10 again, the inner wall of the liquid storage tank 31 is fixed with a guide rib 304, the guide rib 304 and the partition plate 35 are matched, and the partition plate 35 and the liquid storage tank 31 are slidingly connected through the guide rib 304.

[0064] In this embodiment, in the process of rotating the threaded rod 34 by the driving motor 33 and moving the cross arm 36 through the threaded rod 34, the setting of the guide rib 304 can avoid the synchronous rotation of the partition plate 35 with the threaded rod 34, and at the same time, the guide rib 304 can guide the partition plate 35 when the filter element 39 is disassembled.

[0065] The working principle of the present application is as follows:

[0066] When the dirt inside the solvent flow channel 12 and the inner surface of the T-shaped block 14 needs to be cleaned, the sealing cover 21 is attached to one side of the upper die head 11, corresponding to the sealing cover 21 and the T-shaped block 14, the air pump module is started, compressed air is sent to the vacuum generator 22 through the air pump module, so that the negative pressure space inside the sealing cover 21 is tightly attached to the surface of the upper die head 11, the cleaning solvent is injected into the inside of the liquid storage part 30, the diaphragm pump 23 is started, the cleaning solvent inside the liquid storage part 30 is extracted through the diaphragm pump 23, so that the cleaning solvent flows into the inside of the solvent flow channel 12 through the diaphragm pump 23, the cleaning hose 25 and the liquid inlet 13 in turn, and the dirt inside the solvent flow channel 12 and the inner surface of the T-shaped block 14 is cleaned, the cleaned solvent flows to the return hose 26 through the liquid outlet 15 and the return sleeve 24, and flows back to the inside of the liquid storage part 30 through the return hose 26, the returned cleaning solution is filtered through the liquid storage part 30, and flows to the diaphragm pump 23 again. In this process, the cleaning solvent can clean the dirt inside the solvent flow channel 12 and the inner surface of the T-shaped block 14, and the air pressure inside the sealing cover 21 can be reduced by sending compressed air to the inside of the vacuum generator 22 through the air pump module, so that the waste residues remaining between the plurality of T-shaped blocks 14 can be sucked out, the start time and reset time of the driving motor 33 and the gravity threshold value are set through the service terminal, the driving motor 33 is started to drive the cross arm 36, the tension sensor 37, the linkage rod 38 and the filter element 39 to move upward synchronously, when the filter element 39 is separated from the cleaning solvent liquid level and the filter element 39 is drained, the gravity of the filter element 39 and the impurities on the surface thereof is obtained through the tension sensor 37, when the gravity of the filter element 39 and the impurities on the surface thereof is greater than the gravity threshold value, the staff can be reminded to clean the filter element 39 through the service terminal, so as to ensure the filtering effect and efficiency of the filter element 39.

[0067] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A die cleaning device for coating, characterized by: The utility model provides a kind of liquid distribution device, including lower die head (10), one side of the upper end of the lower die head (10) is equipped with upper die head (11), the inside of the upper die head (11) is equipped with solvent flow channel (12) and multiple liquid inlet (13), and the solvent flow channel (12) and multiple liquid inlet (13) are mutually penetrated, the inside of the solvent flow channel (12) is equipped with multiple T-shaped blocks (14), one end of the upper die head (11) is equipped with liquid outlet (15), and the solvent flow channel (12) and liquid outlet (15) are mutually penetrated, and further include: The cleaning part (20) includes a sealing cover (21), a vacuum generator (22), and a diaphragm pump (23). The sealing cover (21) is detachably assembled on one side of the upper die head (11). After the sealing cover (21) and the upper die head (11) are attached, a sealed cleaning cavity is formed inside the sealing cover (21). The sealing cover (21) is adapted to the T-shaped block (14). The vacuum generator (22) is fixed to the upper end of the sealing cover (21). Multiple reflux sleeves (24) are formed on the lower end of the sealing cover (21). The diaphragm pump (23) is arranged on one end of the outer side of the lower die head (10). The diaphragm pump (23) is connected to the liquid inlet (13) through a cleaning hose (25). The liquid storage part (30) is arranged between the sealing cover (21) and the diaphragm pump (23). The liquid storage part (30) is connected to the liquid outlet (15), the diaphragm pump (23), and the reflux sleeve (24) through a reflux hose (26). A circulation path is formed between the diaphragm pump (23), the cleaning hose (25), the liquid inlet (13), the solvent flow channel (12), the liquid outlet (15), the sealing cover (21), the reflux hose (26), and the liquid storage part (30). After compressed air is input to the input end of the vacuum generator (22), the inside of the sealing cover (21) is a negative pressure space.

2. A die cleaning apparatus for coating as claimed in claim 1, wherein: A pressure regulating port (16) is formed on the end of the upper die head (11) away from the liquid outlet (15). The pressure regulating port (16) and the solvent flow channel (12) are mutually penetrated. A safety valve (17) is fixed inside the pressure regulating port (16).

3. A die cleaning apparatus for coating as defined in claim 1, wherein: Multiple one-way valves (18) are fixed inside the liquid inlet (13). The cleaning hose (25) is connected to the liquid inlet (13) through the one-way valve (18).

4. A die cleaning apparatus for coating as defined in claim 1, wherein: A sealing ring (27) is fixed on the end of the sealing cover (21) close to the upper die head (11). The sealing ring (27) is made of rubber.

5. A die cleaning apparatus for coating as defined in claim 1, wherein: The liquid storage part (30) comprises a liquid storage tank (31), a cover plate (32), a driving motor (33), a threaded rod (34), a partition plate (35), a cross arm (36), a plurality of tension sensors (37), a plurality of linkage rods (38) and a filter element (39), the liquid storage tank (31) is arranged at one end of the lower die (10), the cover plate (32) is detachably fixed to the upper end of the liquid storage tank (31), the driving motor (33) is fixed to the upper end of the cover plate (32), the threaded rod (34) is fixed to the output end of the driving motor (33), and the threaded rod (34) and the cover plate (32) are rotationally connected, the partition plate (35) is slidingly connected in the liquid storage tank (31), and the partition plate (35) and the threaded rod (34) are rotationally connected, the cross arm (36) is threadedly connected to the outer side of the threaded rod (34), a plurality of the tension sensors (37) are respectively fixed to the lower ends of the two ends of the cross arm (36), a plurality of the linkage rods (38) are respectively fixed to the lower ends of the plurality of tension sensors (37), and the linkage rods (38) and the partition plate (35) are slidingly connected, and the filter element (39) is fixed to the lower ends of the plurality of linkage rods (38).

6. A die cleaning apparatus for coating as defined in claim 5, wherein: The upper end of the outer side of the liquid storage tank (31) is provided with a return pipe (301), and the lower end of the outer side of the liquid storage tank (31) is provided with a liquid outlet pipe (302), and in the working state, the filter element (39) is located between the return pipe (301) and the liquid outlet pipe (302).

7. A die cleaning apparatus for coating as defined in claim 5, wherein: The inside of the liquid storage tank (31) is fixed with an annular boss (303), and the annular boss (303) and the filter element (39) are matched.

8. A die cleaning apparatus for coating as defined in claim 5, wherein: The inner wall of the liquid storage tank (31) is fixed with a guide rib (304), the guide rib (304) and the partition plate (35) are matched, and the partition plate (35) and the liquid storage tank (31) are slidingly connected through the guide rib (304).

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