Adhesive metering, sizing and coating scraping gun and gluing equipment

Abstract

The utility model relates to the technical field of gluing equipment, and discloses an adhesive metering, sizing and coating scraping gun and gluing equipment, the adhesive metering, sizing and coating scraping gun comprises a main body seat, a gear pump, a safety valve, a spray gun assembly and a coating lip assembly, after an adhesive is input into a liquid inlet channel in the main body seat, the adhesive in the liquid inlet channel enters the gear pump through a liquid suction port of the gear pump, and then the spray gun assembly and the coating lip assembly are connected; the adhesive is discharged through a liquid outlet of the gear pump, metering conveying of the adhesive is achieved, the spray gun assembly is communicated with the adhesive inlet and the liquid outlet channel of the coating lip assembly through the switch valve, and therefore the adhesive enters the adhesive inlet and then is discharged through the adhesive outlet for coating. The safety valve conducts the backflow channel when the pressure in the liquid outlet channel is larger than a preset value, so that part of liquid in the liquid outlet channel can flow back to the liquid inlet channel from the backflow channel, the pressure of the liquid outlet channel and the pressure of the liquid inlet channel are balanced, namely the pressure of a liquid suction port and a liquid discharge port of the gear pump is effectively balanced, and therefore the gear pump is protected; mechanical failure or damage caused by overpressure is avoided, continuous gluing production is guaranteed, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of adhesive coating equipment technology, and in particular to an adhesive metering and coating scraper and adhesive coating equipment. Background Technology

[0002] In related technologies, adhesive coating equipment uses a coating gun to apply adhesive. The adhesive is fed into the internal channel of the coating gun, and a delivery pump transports the adhesive from the internal channel to the outlet. The adhesive flows out from the outlet, thus coating the material surface, achieving adhesive application. However, in practical applications, if the output pressure of the delivery pump is too high (e.g., due to pressure increase caused by outlet blockage), it can easily lead to malfunction or damage to the delivery pump or other components in the delivery path due to overpressure, affecting production efficiency. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an adhesive metering and coating doctor blade that improves safety. This invention also proposes an adhesive coating device incorporating this adhesive metering and coating doctor blade.

[0004] In a first aspect, this utility model provides an adhesive metering and coating doctor blade, comprising a main body, a gear pump, a safety valve, a spray gun assembly, and a coating lip assembly, wherein:

[0005] The main body is provided with a liquid inlet channel, a liquid outlet channel, a reflux channel, a receiving cavity, a first mounting cavity, and a second mounting cavity. The liquid inlet channel and the liquid outlet channel are respectively connected to the receiving cavity. The reflux channel is connected to the liquid outlet channel and the liquid inlet channel. The first mounting cavity is connected to the reflux channel, and the second mounting cavity is connected to the liquid outlet channel.

[0006] A gear pump is disposed in the accommodating cavity. The inlet channel and the outlet channel are respectively connected to the gear pump. The inlet channel is used to input adhesive into the gear pump, and the gear pump is used to output the input adhesive to the outlet channel.

[0007] A safety valve is located in the first mounting cavity and is used to switch the opening and closing of the reflux channel. The safety valve is configured to open the reflux channel when the pressure in the liquid outlet channel is greater than a preset value.

[0008] The spray gun assembly includes a switching valve, which is mounted in the second mounting cavity;

[0009] The lip coating assembly is provided with an adhesive inlet and an adhesive outlet. The lip coating assembly is connected to the main body base. The adhesive inlet is connected to the second mounting cavity. The switching valve is used to switch the on / off state of the adhesive inlet and the liquid outlet channel. The adhesive outlet is used to apply adhesive when the adhesive inlet and the liquid outlet channel are connected.

[0010] The adhesive metering and coating doctor blade of this utility model embodiment has at least the following beneficial effects: In application, after the adhesive is input into the inlet channel, it can be transported to the outlet channel by a gear pump. The adhesive in the inlet channel enters the gear pump through the suction port and is discharged through the discharge port, achieving metered delivery of the adhesive. The spray gun assembly connects the inlet and outlet channels of the coating assembly via a switching valve, allowing the adhesive to enter the inlet and be applied through the outlet. When the pressure in the outlet channel exceeds a preset value, the safety valve activates the return channel. At this time, some liquid in the outlet channel can flow back to the inlet channel from the return channel, thereby balancing the pressure in the outlet and inlet channels, effectively balancing the pressure in the suction and discharge ports of the gear pump. This protects the gear pump, preventing mechanical failure or damage caused by overpressure, thus improving the safety of the adhesive metering and coating doctor blade, ensuring continuous coating production, and improving production efficiency.

[0011] According to some embodiments of the present invention, the adhesive metering and coating scraper includes a main body and a mounting part. The mounting part protrudes from one side of the main body. The accommodating cavity and the first mounting cavity are located in the main body. The second mounting cavity is located on both sides of the mounting part and extends through the mounting part along a first direction. The spray gun assembly and the coating lip assembly are located on both sides of the mounting part along the first direction. The glue inlet of the coating lip assembly is connected to one end of the through-hole of the second mounting cavity.

[0012] According to some embodiments of the present invention, an adhesive metering and coating scraper is provided on the mounting part, which has a plurality of second mounting cavities arranged at intervals. The body part or the mounting part is also provided with a diversion channel. The liquid outlet channel is connected to the diversion channel, and the diversion channel is respectively connected to each of the second mounting cavities.

[0013] According to some embodiments of the present invention, the adhesive metering and coating scraper gun includes:

[0014] The first coating lip has an inlet surface and an outlet surface. An adhesive channel is provided inside the first coating lip. The first coating lip has an inlet surface and an outlet surface. The inlet surface and the outlet surface are connected to the adhesive channel. The first coating lip is detachably connected to the main body base. The inlet surface abuts against the main body base.

[0015] The second coating lip is detachably connected to the first coating lip on the side corresponding to the adhesive dispensing surface, and the side of the second coating lip facing the adhesive dispensing surface has an adhesive surface;

[0016] A flow divider is detachably clamped between the first coating lip and the second coating lip, allowing the adhesive from the dispensing port to flow out through the gap between the flow divider and the dispensing surface.

[0017] According to some embodiments of the present invention, the adhesive metering and coating scraper includes a safety valve comprising a valve body and a valve core assembly. The valve body is installed in the first mounting cavity and has an inner cavity, an inlet, and a return hole. The inlet is connected to the outlet channel, and the return hole is connected to the return channel. The valve core assembly is disposed in the inner cavity and is used to switch the on / off state of the inlet and the return hole.

[0018] The valve core assembly is configured to connect the inlet and the return hole when the pressure at the inlet is greater than a preset value, so that the outlet channel is connected to the return channel.

[0019] According to some embodiments of the present invention, the adhesive metering and coating scraper further includes a heating element disposed inside the main body seat, which is used to heat the main body seat so that the adhesive inside the main body seat is heated.

[0020] According to some embodiments of the present invention, the adhesive metering and coating scraper further includes a filter assembly, and the main body is also provided with a third mounting cavity, which is connected to the liquid inlet channel. The filter assembly is installed in the third mounting cavity and is used to filter the adhesive in the liquid inlet channel before it enters the gear pump.

[0021] According to some embodiments of the present invention, the adhesive metering and coating scraper gun further includes a throat connector. The throat connector is hollow inside and is connected to the main body and connected to the liquid inlet channel. The throat connector is used to connect to the adhesive delivery pipe.

[0022] Secondly, this utility model embodiment also provides a glue coating device, including the above-mentioned adhesive metering and coating scraper, which can effectively avoid mechanical failure or damage caused by overpressure of the gear pump, ensure continuous glue coating production, and help improve production efficiency.

[0023] The adhesive application equipment according to some embodiments of the present invention further includes a delivery hose and a liquid storage device. The liquid storage device is used to provide adhesive. The delivery hose is connected between the adhesive metering and coating doctor and the liquid storage device, and is used to deliver the adhesive in the liquid storage device to the adhesive metering and coating doctor.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an adhesive metering and coating scraper according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the main body of the adhesive metering and coating scraper according to an embodiment of the present invention;

[0027] Figure 3 for Figure 2 The diagram shows a partial internal channel structure of the main body. To facilitate identification of the channels, the outline of the channels is indicated by solid lines, and the solid cross-section of the main body is omitted.

[0028] Figure 4 for Figure 2 The diagram shows a partial internal channel structure from another perspective of the main body. To facilitate identification of the channel, the outline of the channel is indicated by solid lines, and the solid cross-section of the main body is omitted.

[0029] Figure 5 This is an exploded view of an adhesive metering and coating scraper according to an embodiment of the present invention;

[0030] Figure 6 This is a cross-sectional schematic diagram of the safety valve in an adhesive metering and coating scraper according to an embodiment of the present invention.

[0031] Figure 7 This is an exploded view of the coating lip assembly in an adhesive metering and coating doctor blade according to an embodiment of the present invention.

[0032] Figure 8 This is an exploded view of the spray gun assembly in an adhesive metering and coating scraper according to an embodiment of the present invention.

[0033] Figure 9 This is an exploded view of the filter assembly in an adhesive metering and coating doctor blade according to an embodiment of the present invention.

[0034] Figure label:

[0035] Main body 100; liquid inlet channel 101; liquid outlet channel 102; return channel 103; accommodating cavity 104; first mounting cavity 105; second mounting cavity 106; third mounting cavity 107; diversion channel 108;

[0036] Body 110; Mounting part 120; End cap 130; Heating element 140;

[0037] Gear pump 200; Servo motor 210;

[0038] Safety valve 300; valve body 310; inlet 311; reflux hole 312; valve seat 313; valve port 314; adjusting rod 320; spring 330; valve core rod 340; ball 350; adjusting nut 360;

[0039] Spray gun assembly 400; Switch valve 410; Air intake control assembly 420; Air source interface 421; Connecting rod 422; Solenoid valve 423; Air path branch seat 424;

[0040] Lip application kit 500;

[0041] First lip coating 510; Inlet 511; Outlet 512; Inlet surface 513; Outlet surface 514; First fastener 515;

[0042] Second lip coating 520; Second fastener 521; Diverter 530;

[0043] Filter assembly 600; filter screen 610; sealing ring 620; filter head 630; filter inlet 631;

[0044] 700 throat connector. Detailed Implementation

[0045] The following will describe the concept and technical effects of this utility model clearly and completely with reference to the embodiments, so as to fully understand the purpose, features and effects of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the protection scope of this utility model.

[0046] In the description of the embodiments of this utility model, if directional descriptions are involved, such as "up", "down", "front", "back", "left", "right" etc., indicating the directional or positional relationship, they are based on the directional or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In the description of this utility model embodiment, if a feature is referred to as "setting," "fixing," "connecting," or "installing" on another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, connected, or installed on the other feature. In the description of this utility model embodiment, if "several" is involved, it means one or more; if "multiple" is involved, it means two or more; if "greater than," "less than," or "exceeds," it should be understood as excluding the stated number; if "above," "below," or "within," it should be understood as including the stated number. If "first" or "second" is involved, it should be understood as used to distinguish technical features, and not as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0048] This utility model provides an adhesive metering and coating doctor blade with improved safety, as well as a coating device incorporating the adhesive metering and coating doctor blade, which helps to improve adhesive coating efficiency. The embodiments of the present invention are described below with reference to the accompanying drawings:

[0049] refer to Figure 1 The adhesive metering and coating scraper of the first aspect of this utility model includes a main body 100, a gear pump 200, a safety valve 300, a spray gun assembly 400, and a coating lip assembly 500.

[0050] refer to Figures 2 to 4 The main body 100 is provided with an inlet channel 101, an outlet channel 102, a return channel 103, a receiving cavity 104, a first mounting cavity 105, and a second mounting cavity 106. The inlet channel 101 and the outlet channel 102 are respectively connected to the receiving cavity 104. The return channel 103 is connected to the outlet channel 102 and the inlet channel 101. The first mounting cavity 105 is connected to the return channel 103, and the second mounting cavity 106 is connected to the outlet channel 102. (Reference) Figures 1 to 4 The gear pump 200 is located in the accommodating cavity 104. The inlet channel 101 and the outlet channel 102 are respectively connected to the gear pump 200. The inlet channel 101 is used to input adhesive into the gear pump 200, and the gear pump 200 is used to output the input adhesive to the outlet channel 102.

[0051] In application, after the adhesive is fed into the inlet channel 101, it can be transported to the outlet channel 102 by the gear pump 200. The adhesive in the inlet channel 101 enters the gear pump 200 through the suction port and is discharged through the discharge port of the gear pump 200, thus realizing the metering and delivery of the adhesive.

[0052] It is understood that the gear pump 200 is a commonly used fluid pumping device, generally including a pump casing with a suction port and a discharge port, and a gear mechanism located inside the pump casing. The fluid is drawn in and discharged through the volume change generated by the meshing and rotation of the gear mechanism. The volume change generated by the continuous rotation of the gears allows the gear pump 200 to provide a stable flow rate and is suitable for conveying high-viscosity liquids. In this embodiment, the gear pump 200 can be driven to rotate by a servo motor 210. During the rotation of the gears, the gear pump 200 draws in and discharges the adhesive, achieving metered pumping of the adhesive. On the suction port side, the gear teeth facing the suction port disengage, creating a vacuum, and the adhesive in the inlet channel 101 is drawn into the pump casing through the suction port; on the discharge port side, the gear teeth facing the discharge port re-mesh, compressing the liquid and discharging it into the outlet channel 102.

[0053] In this embodiment of the invention, a safety valve 300 is disposed in the first mounting cavity 105 and is used to switch the opening and closing of the return channel 103. The safety valve 300 is configured to open the return channel 103 when the pressure in the outlet channel 102 is greater than a preset value. Therefore, during the continuous delivery of adhesive by the gear pump 200, when the pressure in the outlet channel 102 is greater than the preset value, the safety valve 300 opens the return channel 103. At this time, some liquid in the outlet channel 102 can flow back from the return channel 103 to the inlet channel 101, thereby balancing the pressure of the outlet channel 102 and the inlet channel 101, that is, effectively balancing the pressure of the suction port and the discharge port of the gear pump 200, thereby protecting the gear pump 200 and avoiding mechanical failure or damage caused by overpressure. This improves the safety of the adhesive metering and coating doctor blade, ensures continuous coating production, and helps to improve production efficiency.

[0054] refer to Figure 5 The spray gun assembly 400 includes a switching valve 410, which is installed in the second mounting cavity 106. The lip coating assembly 500 is provided with an adhesive inlet 511 and an adhesive outlet 512. The lip coating assembly 500 is connected to the main body 100. The adhesive inlet 511 communicates with the second mounting cavity 106. The switching valve 410 is used to switch the on / off state of the adhesive inlet 511 and the liquid outlet channel 102. The adhesive outlet 512 is used to apply adhesive when the adhesive inlet 511 and the liquid outlet channel 102 are connected. The spray gun assembly 400 connects the adhesive inlet 511 and the liquid outlet channel 102 of the lip coating assembly 500 through the switching valve 410, so that the adhesive enters the adhesive inlet 511 and is applied through the adhesive outlet 512, achieving metered adhesive application.

[0055] Understandably, if the adhesive outlet 512 or the liquid outlet channel 102 is blocked during actual use of the adhesive metering and coating doctor gun, the pressure on the discharge port side of the gear pump 200 will increase. The maximum adhesive pressure of the adhesive metering and coating doctor gun can be effectively limited and adjusted by the opening pressure of the preset safety valve 300, which can effectively prevent the gear pump 200 from being overloaded or damaged. This not only improves the safety of the system, but also extends the service life of the equipment. Furthermore, the safety valve 300 can also automatically relieve pressure when the pressure in the liquid outlet channel 102 is too high. When the channel on the discharge port side of the gear pump 200 is blocked (for example, the glue outlet 512 is blocked or the liquid outlet channel 102 is blocked), the gear pump 200 continues to deliver liquid to the liquid outlet channel 102, which will cause the pressure in the liquid outlet channel 102 to continue to increase. When the pressure reaches the set value of the safety valve 300, the safety valve 300 will open automatically, and part of the adhesive will flow back to the liquid inlet channel 101 through the return channel 103 to relieve pressure. This effectively maintains the pressure stability and reliability of the glue outlet 512, ensures the stability of the glue output, and thus improves the adhesive coating quality.

[0056] In some embodiments of the adhesive metering and coating doctor blade, the safety valve 300 includes a valve body 310 and a valve core assembly. The valve body 310 is installed in a first mounting cavity 105 and has an inner cavity, an inlet 311, and a return hole 312. The inlet 311 is connected to the outlet channel 102, and the return hole 312 is connected to the return channel 103. The return hole 312 is connected to the inner cavity. The valve body 310 also has a valve connecting the inlet 311 and the inner cavity. The valve core assembly is located in the inner cavity and is used to switch the opening and closing of the valve, thereby switching the on / off state of the inlet 311 and the return hole 312. The valve core assembly is configured to open the inlet 311 and the return hole 312 when the pressure at the inlet 311 is greater than a preset value, so that the outlet channel 102 is connected to the return channel 103. Safety valve 300 can be a pneumatic reflux valve. The valve core is driven by the pressure difference between air pressure and adhesive hydraulic pressure to achieve valve opening and closing control. When the pressure at the inlet 311 is greater than the preset value, the valve is opened to overcome the air pressure, thereby opening the inlet 311 and the reflux hole 312. When the pressure at the inlet 311 is less than or equal to the preset value, the reflux hole 312 is closed under the action of air pressure. Thus, the valve is opened and closed by compressed air, which has the advantage of fast response and is suitable for automated control applications.

[0057] Or, refer to Figure 6The safety valve 300 can also be a stud-regulated reflux valve. The valve body 310 has a valve seat 313 inside, with a valve port 314 connecting the inner cavity and the inlet 311. The valve core assembly includes an adjusting rod 320, a spring 330, a valve core rod 340, and a ball 350. The elastic force of the spring 330 keeps the valve core rod 340 abutting against the ball 350 against the valve seat 313, thereby closing the valve port 314 and blocking the connection between the inlet 311 and the reflux hole 312. When the pressure at the inlet 311 exceeds a preset value, the adhesive at the valve port 314 pushes the ball 350, causing the valve core rod 340 to move against the elastic force of the spring 330, thereby opening the valve port 314 and connecting the inlet 311 and the reflux hole 312. In use, the relative position between the adjusting rod 320 and the valve body 310 can be adjusted by adjusting the adjusting nut 360, which can adjust the tightness of the pressure spring 330, that is, adjust the force of the spring 330 against the valve core rod 340, thereby realizing the adjustment of different opening and closing pressures (i.e. preset values) to meet different usage needs. It has high reliability and stability, and the structure is relatively simple, making maintenance and upkeep convenient.

[0058] refer to Figure 1 and Figure 2 In some embodiments of the adhesive metering and coating doctor blade, the main body 100 includes a body portion 110 and a mounting portion 120, with the mounting portion 120 protruding from one side of the body portion 110. A receiving cavity 104 and a first mounting cavity 105 are located in the body portion 110, and a second mounting cavity 106 is located on both sides of the mounting portion 120. Therefore, the gear pump 200 and safety valve 300 are connected to the body portion 110, and the coating lip assembly 500 and the switching valve 410 can be connected to the mounting portion 120, achieving integration and rational arrangement of the main body 100 with functional structures such as the gear pump 200, safety valve 300, switching valve 410, and coating lip assembly 500. The mounting portion 120 and the body portion 110 can be separate structures, connected and assembled using common assembly methods for convenient separate processing, production, disassembly, and maintenance; alternatively, the mounting portion 120 and the body portion 110 can be an integral structure, offering good overall integrity and saving assembly steps and eliminating the need for sealing measures at their connection point.

[0059] The mounting part 120 extends through the mounting part 120 in the first direction. The spray gun assembly 400 and the lip coating assembly 500 are located on both sides of the mounting part 120 in the first direction. The glue inlet 511 of the lip coating assembly 500 is connected to the through port of one end of the second mounting cavity 106. Therefore, the mounting part 120 provides a mounting base for the lip coating assembly 500 and the switch valve 410, which facilitates the fixing and communication of the two.

[0060] refer to Figure 1 and Figure 2In some embodiments, the mounting portion 120 is provided with a plurality of spaced-apart second mounting cavities 106, thus allowing for the assembly of a plurality of switching valves 410. The body portion 110 or the mounting portion 120 is also provided with a diversion channel 108, to which the liquid outlet channel 102 is connected. The diversion channel 108 connects to each of the second mounting cavities 106, thereby diverting the liquid in the liquid outlet channel 102 to each switching valve 410 for opening and closing control.

[0061] The coating lip assembly 500 may include multiple independent coating lips, each with an inlet 511 and an outlet 512, corresponding one-to-one with each second mounting cavity 106 and switching valve 410, thereby achieving coating control of multiple outlets 512 and enabling strip-shaped coating. Alternatively, refer to... Figure 7 The lip coating assembly 500 forms multiple glue inlets 511, and each of the second mounting cavities 106 is connected to each glue inlet 511. The lip coating assembly 500 also forms an elongated glue outlet 512, and each glue inlet 511 is connected to the glue outlet 512, so that the adhesive after being diverted by the diversion channel 108 is input into the glue inlet 511 from different positions, and a strip of glue with a certain width can be applied.

[0062] For example, refer to Figure 7 The lip application component 500 may include a first lip application 510 and a second lip application 520.

[0063] The first coating lip 510 has an inlet surface 513 and an outlet surface 514. An adhesive channel is provided inside the first coating lip 510. An inlet 511 is formed on the inlet surface 513, and an outlet 512 is formed on the outlet surface 514. The inlet 511 and outlet 512 communicate with the adhesive channel. The first coating lip 510 is detachably connected to the main body 100, for example, via a first fastener 515. The inlet surface 513 abuts against the main body 100. The second coating lip 520 is detachably connected to the first coating lip 510 on the side corresponding to the outlet surface 514. The side of the second coating lip 520 facing the outlet surface 514 has a contact surface. For example, the second coating lip 520 can be detachably connected to the first coating lip 510 via a second fastener 521. The lip coating assembly 500 may further include a flow divider 530, which is detachably clamped between the first lip coating 510 and the second lip coating 520. For example, the flow divider 530 has a through hole for the second fastener 521 to pass through. When the switch valve 410 is open, the adhesive can enter the adhesive path inside the first lip coating 510 from the inlet 511 and then flow out from the outlet 512. The adhesive at the outlet 512 can flow out through the gap between the flow divider 530 and the outlet surface 514, thereby enabling the application of adhesive to the surface of the object.

[0064] The switching valve 410 can be a commonly used solenoid valve 423 or a pneumatic valve to realize the opening and closing function, thereby controlling the connection and disconnection between the glue inlet 511 of the lip coating assembly 500 and the second mounting cavity 106 on the main body 100. In some embodiments, the switching valve 410 can be a pneumatic valve, and the spray gun assembly 400 may also include an air intake control assembly 420 for controlling the air intake of the switching valve 410, thereby controlling the opening and closing of the switching valve 410 pneumatically.

[0065] As an example, see reference Figure 8 The intake control assembly 420 includes an air source interface 421, a connecting rod 422, a solenoid valve 423, and an air path branch seat 424 with an internal intake channel. The intake channel is connected to the gas inlet of the switching valve 410. The connecting rod 422 is hollow to allow gas flow. One end of the connecting rod 422 is connected to the air path branch seat 424, and the hollow part is connected to the intake channel. The other end of the connecting rod 422 is connected to the air source interface 421, and the hollow part is connected to the air source interface 421. The solenoid valve 423 switches the opening and closing of the air source interface 421. Thus, the air path can be connected simultaneously with the connection of the air path branch seat 424 to the switching valve 410, eliminating the need for external piping and providing a simple and reliable structure. The air path branch seat 424 has corresponding connection ports for each switching valve 410 to connect to the gas path respectively. Therefore, multiple switching valves 410 can be controlled by the same intake control assembly 420.

[0066] refer to Figure 5 In some embodiments, the adhesive metering and coating doctor blade also includes a heating element 140, which is disposed inside the main body 100. The heating element 140 heats the main body 100 to heat the adhesive within it, thus helping to maintain the fluidity of the adhesive, effectively avoiding blockage caused by adhesive solidification, and ensuring smooth application and improved coating quality. As an example, the main body 100 has mounting holes. The heating element 140 can be a rod-shaped heating tube that passes through the mounting hole. The heating tube contacts the wall of the mounting hole to heat the main body 100, thereby heating the adhesive in each channel inside the main body 100. As an example, the inlet channel 101 and the outlet channel 102 have extensions in the same direction as the mounting hole. Therefore, the distance between the heating element 140 and the extensions along the extension direction is substantially the same, thus uniformly heating the adhesive within the extensions.

[0067] refer to Figures 3 to 5As an example, the main body 100 also includes an end cap 130, extensions of the liquid inlet channel 101 and the liquid outlet channel 102, and mounting holes that pass through both ends of the main body 110 to facilitate the processing of each channel and mounting hole. The through points at both ends of the main body 110 are sealed by the end cap 130, which is detachably fixed to the main body 110.

[0068] refer to Figure 1 and Figure 2 In some embodiments, the adhesive metering and coating doctor blade may also include a filter assembly 600, and the main body 100 may also be provided with a third mounting cavity 107. For example, the main body 110 is provided with a third mounting cavity 107, which is connected to the liquid inlet channel 101. The filter assembly 600 is installed in the third mounting cavity 107 to filter the adhesive in the liquid inlet channel 101 before it enters the gear pump 200, effectively preventing impurities in the adhesive from entering the gear pump 200, thereby ensuring the accuracy of the gear pump 200 and reducing the probability of damage to the gear pump 200.

[0069] For details, please refer to Figure 3 and Figure 9 The filter assembly 600 may include a filter screen 610, a sealing ring 620, and a filter head 630. The filter screen 610 is connected to the filter head 630 and is located inside the third mounting cavity 107, with a gap between the filter screen 610 and the inner wall of the third mounting cavity 107. One end of the filter head 630 is located inside the third mounting cavity 107 and is in contact with the inner wall of the third mounting cavity 107. The outer wall of the filter head 630 is sealed to the inner wall of the third mounting cavity 107 through the sealing ring 620, thereby closing the third mounting cavity 107. The filter head 630 is hollow inside, and the outer wall of the filter head 630 has a filter inlet 631 that communicates with the interior. The interior of the filter head 630 communicates with the interior of the filter screen 610. The filter assembly 600 divides the liquid inlet channel 101 into a first section connected to the external adhesive inlet structure and a second section connected to the gear pump 200. The filter inlet 631 is connected to the first section of the liquid inlet channel 101, so the adhesive can enter the filter head 630 through the filter inlet, and then enter the interior of the filter screen 610 to achieve filtration of the adhesive. The adhesive filtered out by the filter screen 610 enters the gap between the filter screen 610 and the third mounting cavity 107, thereby connecting the second section of the liquid inlet channel 101 to the gear pump 200, thus filtering the adhesive before it enters the gear pump 200.

[0070] refer to Figure 1 and Figure 5In some embodiments, the adhesive metering and coating scraper also includes a throat connector 700. The throat connector 700 is hollow inside. The throat connector 700 is connected to the main body 100 and connected to the liquid inlet channel 101. The throat connector 700 is used to connect the adhesive delivery hose, which facilitates the connection of the delivery hose and facilitates the entry of adhesive into the liquid inlet channel 101.

[0071] As an example, in application, the adhesive metering and coating doctor blade of this embodiment can deliver adhesive to the adhesive metering and coating doctor blade via a delivery hose. After the adhesive enters the inlet channel 101 through the throat connector 700, it is filtered by the filter assembly 600 and then enters the gear pump 200. The gear pump 200 pumps the adhesive into the outlet channel 102, and then through the diversion channel 108 and the switch valve 410, it enters each glue inlet 511 and flows into the glue path of the coating assembly 500, exiting through the glue outlet 512 for coating. The outlet channel 102 is connected to the inlet channel 101 through the safety valve 300 and the return channel 103. When the pressure in the outlet channel 102 is greater than a preset value, the safety valve 300 opens the return channel 103 and the outlet channel 102, thereby connecting the outlet channel 102 to the inlet channel 101 through the return channel 103, realizing the return of the adhesive.

[0072] A second aspect of this utility model also provides a coating device, including the aforementioned adhesive metering and coating doctor blade, which can effectively avoid mechanical failures or damage caused by overpressure of the gear pump 200, ensuring continuous coating production and improving production efficiency. The coating device may further include a delivery hose and a liquid storage device. The liquid storage device provides the adhesive, and the delivery hose connects the adhesive metering and coating doctor blade and the liquid storage device to deliver the adhesive from the liquid storage device to the adhesive metering and coating doctor blade. A heating wire is wound inside the delivery hose, providing heating performance, which helps maintain the fluidity and viscosity of the adhesive during delivery, ensuring the stability and accuracy of the adhesive dispensing from the adhesive metering and coating doctor blade, and guaranteeing coating quality.

[0073] The gluing equipment of this utility model embodiment can be used for polyamine hot melt adhesives and can be applied to the adhesive spraying of various products, such as for bonding cardboard handles, paper boxes, paper cups, hygiene products and straws, etc.

[0074] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. An adhesive metering and application coating scraper, characterized in that, include: The main body is provided with a liquid inlet channel, a liquid outlet channel, a reflux channel, a receiving cavity, a first mounting cavity, and a second mounting cavity. The liquid inlet channel and the liquid outlet channel are respectively connected to the receiving cavity, the reflux channel is connected to the liquid inlet channel, the first mounting cavity is connected to the reflux channel and the liquid outlet channel, and the second mounting cavity is connected to the liquid outlet channel. A gear pump is disposed in the accommodating cavity. The inlet channel and the outlet channel are respectively connected to the gear pump. The inlet channel is used to input adhesive into the gear pump, and the gear pump is used to output the input adhesive to the outlet channel. A safety valve, located in the first mounting cavity, is used to switch the on / off state of the reflux channel and the liquid outlet channel. The safety valve is configured to open the reflux channel when the pressure in the liquid outlet channel is greater than a preset value. The spray gun assembly includes a switching valve, which is mounted in the second mounting cavity; The lip coating assembly is provided with an adhesive inlet and an adhesive outlet. The lip coating assembly is connected to the main body seat. The adhesive inlet is connected to the second mounting cavity. The switching valve is used to switch the on / off state of the adhesive inlet and the liquid outlet channel. The adhesive outlet is used to apply adhesive when the adhesive inlet and the liquid outlet channel are connected.

2. The adhesive metering and coating scraper according to claim 1, characterized in that, The main body includes a body portion and a mounting portion, wherein the mounting portion protrudes from one side of the body portion, wherein: The receiving cavity and the first mounting cavity are located on the main body, the second mounting cavity is located on both sides of the mounting part and extends through the mounting part along the first direction, the spray gun assembly and the lip coating assembly are respectively located on both sides of the mounting part along the first direction, and the glue inlet of the lip coating assembly is connected to one end of the through-hole of the second mounting cavity.

3. The adhesive metering and coating scraper according to claim 2, characterized in that, The mounting part is provided with a plurality of second mounting cavities arranged at intervals. The body part or the mounting part is also provided with a diversion channel. The liquid outlet channel is connected to the diversion channel, and the diversion channel is connected to each of the second mounting cavities respectively.

4. The adhesive metering and coating scraper according to claim 1, characterized in that, The lip-applying component includes: The first coating lip has an inlet surface and an outlet surface. An adhesive channel is provided inside the first coating lip. The first coating lip has an inlet surface and an outlet surface. The inlet surface and the outlet surface are connected to the adhesive channel. The first coating lip is detachably connected to the main body base. The inlet surface abuts against the main body base. The second coating lip is detachably connected to the first coating lip on the side corresponding to the adhesive dispensing surface, and the side of the second coating lip facing the adhesive dispensing surface has an adhesive surface; A flow divider is detachably clamped between the first coating lip and the second coating lip, allowing the adhesive from the dispensing port to flow out through the gap between the flow divider and the dispensing surface.

5. The adhesive metering and coating scraper according to claim 1, characterized in that, The safety valve includes a valve body and a valve core assembly. The valve body is installed in the first mounting cavity and has an inner cavity, an inlet, and a reflux hole. The inlet is connected to the outlet channel, and the reflux hole is connected to the reflux channel. The valve core assembly is disposed in the inner cavity and is used to switch the on / off state of the inlet and the reflux hole. The valve core assembly is configured to connect the inlet and the return hole when the pressure at the inlet is greater than a preset value, so that the outlet channel is connected to the return channel.

6. The adhesive metering and coating scraper according to claim 1, characterized in that, The adhesive metering and coating doctor blade also includes a heating element, which is located inside the main body and is used to heat the main body so that the adhesive inside the main body is heated.

7. The adhesive metering and coating scraper according to claim 1, characterized in that, The adhesive metering and coating scraper also includes a filter assembly, and the main body is further provided with a third mounting cavity, which is connected to the liquid inlet channel. The filter assembly is installed in the third mounting cavity and is used to filter the adhesive in the liquid inlet channel before it enters the gear pump.

8. The adhesive metering and coating scraper according to any one of claims 1 to 7, characterized in that, The adhesive metering and coating scraper also includes a throat connector, which is hollow inside. The throat connector is connected to the main body and connects to the liquid inlet channel. The throat connector is used to connect to the adhesive delivery pipe.

9. A glue-applying device, characterized in that, Includes the adhesive metering and coating scraper as described in any one of claims 1 to 8.

10. The adhesive coating equipment according to claim 9, characterized in that, The adhesive coating equipment also includes a delivery hose and a liquid storage device. The liquid storage device is used to provide adhesive. The delivery hose is connected between the adhesive metering and coating doctor and the liquid storage device, and is used to deliver the adhesive in the liquid storage device to the adhesive metering and coating doctor.

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