Coating machine

Abstract

The invention relates to the technical field of coating, in particular to a coating machine which comprises a machine base, a coating head, an adjusting mechanism and two cleaning knives, the coating head is arranged on the machine base and comprises a first branch head and a second branch head, and a material storage area, a conveying channel and a coating lip are formed between the first branch head and the second branch head; the two cleaning knives are inserted into the first branch head and the second branch head respectively and located on the two sides of the conveying channel respectively. The two cleaning knives have three working states according to the use condition of the coating machine, and when the coating machine performs normal coating, the two cleaning knives are arranged at an interval, so that paint can smoothly pass through the conveying channel; when the coating machine is stopped, the two cleaning knives jointly block the conveying channel, and the situation that the coating continuously moves towards the coating lip under the action of gravity is avoided; after the coating machine is shut down and before the coating machine is restarted, the two cleaning knives are periodically and alternately inserted into the coating lip so as to clean crystal substances at the coating lip, and normal use of the next time is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of coating, in particular to a coating machine. Background Art

[0002] Coating is a technology that evenly applies paint, adhesive or other fluid materials to the surface of a substrate. The purpose is to form a continuous coating on the surface of the substrate to achieve specific functions or enhance the performance of the material. Coating technology is widely used in industrial manufacturing, including the processing of various substrates such as paper, plastic film, cloth, leather, etc.

[0003] When coating a substrate, a coating machine is often used. A coating machine is a mechanical processing equipment, which is mainly used to apply coatings such as coatings, glues, paints, etc. evenly and firmly to the surface of another substrate. In the related art, for example, Chinese patent application CN111389664A discloses a coating head assembly and a coating machine. When the coating machine is in use, slurry is simultaneously transported into the flow channel through various infusion channels, and the flow rate of the slurry in each infusion pipeline is controlled so that the slurry flows out of each area of ​​the outlet at approximately the same speed, thereby making the flow rate of the slurry flowing out of each area of ​​the outlet the same, so that the thickness of the slurry coated on each area of ​​the target object will be the same.

[0004] When the existing coating machine is working, due to the coating gap, when the coating machine stops, crystallization will appear at the coating lip of the coating head. The presence of crystals affects both the next normal operation of the coating head and the overall coating effect. Summary of the invention

[0005] Based on this, it is necessary to provide a coating machine to address the problem of poor coating effect in the current coating process.

[0006] The above purpose is achieved through the following technical solutions: A coating machine, comprising: Machine base; A coating head is arranged on the machine base, the coating head comprises a first sub-head and a second sub-head, a material storage area, a conveying channel and a coating lip are formed between the first sub-head and the second sub-head, the material storage area is configured to receive the coating; the conveying channel connects the material storage area and the coating lip; the coating lip is configured to spray the coating; Two cleaning knives are respectively inserted into the first sub-head and the second sub-head, and are respectively located on both sides of the conveying channel; the two cleaning knives are configured to have a first working state, a second working state and a third working state according to the use of the coater. When the coater is coating normally, the two cleaning knives are in the first working state, and the two cleaning knives are arranged at intervals; when the coater is stopped, the two cleaning knives are in the second working state, and the two cleaning knives jointly block the conveying channel; after the coater is stopped and before it is restarted, the two cleaning knives are in the third working state, and the two cleaning knives are periodically and alternately inserted into the coating lip to clean the crystals on the coating lip; An adjustment mechanism, wherein the adjustment mechanism is configured to switch the working states of the two cleaning knives; The adjustment mechanism includes two slide grooves and two slide rods. The two slide grooves are respectively arranged on the first branch head and the second branch head, and are respectively located on both sides of the conveying channel; the two slide rods are respectively fixedly arranged on the two cleaning knives, and are respectively slidably inserted into the two slide grooves.

[0007] Furthermore, the adjustment mechanism further includes a driving member, and the driving member is configured to provide a driving force for the sliding rod to slide in the sliding groove.

[0008] Furthermore, the coating machine also includes an exhaust mechanism, and the exhaust mechanism is configured to exhaust bubbles contained in the coating stored in the material storage area.

[0009] Furthermore, the exhaust mechanism includes a first pipe hole, which is arranged on the second branch head, and one end of the first pipe hole is connected to the bottom of the material storage area, and the other end is connected to the position where the cleaning knife is located on the second branch head.

[0010] Furthermore, the exhaust mechanism also includes a material return assembly, and the material return assembly is configured to transport the paint in the first tube hole back to the material storage area from the top.

[0011] Further, the return material assembly includes a second tube hole, a first one-way valve and a second one-way valve, one end of the second tube hole is connected to the top of the material storage area, and the other end is connected to the first tube hole; the first one-way valve is inserted in the first tube hole and is located at the connection point between the first tube hole and the material storage area, and the opening direction of the first one-way valve is from the material storage area to the first tube hole; the second one-way valve is inserted in the second tube hole and is located at the connection point between the second tube hole and the material storage area, and the opening direction of the second one-way valve is from the second tube hole to the material storage area.

[0012] Furthermore, the number of the first tube holes and the second tube holes is equal, and both are multiple, and the multiple first tube holes are arranged at intervals.

[0013] Furthermore, the coating machine further comprises a feeding mechanism, and the feeding mechanism is configured to supply the coating to the material storage area.

[0014] Furthermore, the feeding mechanism includes a storage barrel, a feeding pump and a feeding pipe, the storage barrel is arranged on the machine base, and the paint is stored inside the storage barrel; the feeding pipe is inserted into the first branch head and is connected to the storage area; the feeding pump is arranged on the machine base, the suction end of the feeding pump is connected to the storage barrel, and the discharge end of the feeding pump is connected to the feeding pipe.

[0015] The beneficial effects of the present invention are: During use of a coating machine provided by the present invention, firstly, the two cleaning knives are adjusted by an adjusting mechanism to switch from the second working state to the third working state. When the two cleaning knives are in the third working state, the two cleaning knives are periodically and alternately inserted into the coating lip to clean the crystals at the coating lip to avoid affecting the next work of the coating head. After the cleaning is completed, the two cleaning knives are adjusted by the adjusting mechanism to switch from the third working state to the first working state. When the two cleaning knives are in the first working state, the two cleaning knives are arranged at intervals to smooth the conveying channel. Then, the substrate is placed on the machine base, and the substrate is driven to move in a direction close to the coating head, and at the same time, coating is injected into the storage area, and the coating is Driven by gravity and subsequent coatings, the coating passes through the conveying channel and is sprayed out from the coating lip; when the substrate passes under the coating head, the coating sprayed from the coating lip is simultaneously coated on the substrate, and as the substrate continues to move, the bottom of the coating head gradually smoothes the coating on the substrate, thereby achieving uniform coating; after coating is completed, the two cleaning knives are adjusted by the adjustment mechanism to switch from the first working state to the second working state. When the two cleaning knives are in the second working state, the two cleaning knives jointly block the conveying channel, isolating the coating in the storage area while preventing the coating from continuing to move to the coating lip under the action of gravity, and preventing the accumulation of crystals at the coating lip to affect the next operation of the coating head.

[0016] Furthermore, by providing an exhaust mechanism, when in use, the air bubbles contained in the coating stored in the storage area can be exhausted through the exhaust mechanism, which is beneficial to improving the coating quality.

[0017] Furthermore, by providing a material return assembly, when in use, the paint in the first tube hole can be transported from the top back to the material storage area through the material return assembly, thereby reducing paint waste and improving defoaming efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A schematic diagram of the three-dimensional structure of a coating machine provided in one embodiment of the present invention; Figure 2 A three-dimensional structural schematic diagram of a partial structure of a coating machine provided by an embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of the front view structure of Figure 4 for Figure 3 Middle AA section view; Figure 5 for Figure 4 A schematic diagram of the partially enlarged structure at B in the middle; Figure 6 for Figure 4 A schematic diagram of the partially enlarged structure at C in the middle; Figure 7 for Figure 4 The schematic diagram of the local enlarged structure at D in the middle; Figure 8 Working principle of the cleaning knife of the coating machine provided by one embodiment of the present invention Figure 1 ; Fig. 9 Working principle of the cleaning knife of the coating machine provided by one embodiment of the present invention Figure 2 .

[0019] in: 1. Machine base; 2. Coating head; 21. First sub-head; 22. Second sub-head; 23. Material storage area; 24. Conveying channel; 25. Coating lip; 3. Cleaning knife; 41, first tube hole; 421, second tube hole; 422, first one-way valve; 423, second one-way valve; 51. Feed pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] like Figures 1 to 9 As shown, a coating machine provided by an embodiment of the present invention is used for coating, and is configured to include a machine base 1, a coating head 2, an adjustment mechanism and two cleaning knives 3. The coating head 2 is arranged on the machine base 1, and the coating head 2 is configured to include a first sub-head 21 and a second sub-head 22. A storage area 23, a conveying channel 24 and a coating lip 25 are formed between the first sub-head 21 and the second sub-head 22. The storage area 23 is configured to receive the coating; the conveying channel 24 connects the storage area 23 and the coating lip 25; the coating lip 25 is configured to spray the coating; the two cleaning knives 3 are respectively inserted in the first sub-head 21 and the second sub-head 22, and are respectively located in the conveying channel On both sides of 24; the two cleaning knives 3 are configured to have a first working state, a second working state and a third working state according to the use of the coater. When the coater is coating normally, the two cleaning knives 3 are in the first working state, and the two cleaning knives 3 are arranged at intervals; when the coater is stopped, the two cleaning knives 3 are in the second working state, and the two cleaning knives 3 are jointly blocked at the conveying channel 24; before the coater is restarted after being stopped, the two cleaning knives 3 are in the third working state, and the two cleaning knives 3 are periodically and alternately inserted into the coating lip 25 to clean the crystals at the coating lip 25; the adjustment mechanism is configured to be able to switch the working states of the two cleaning knives 3.

[0024] Specifically in this embodiment, Figure 1As shown, the base 1 is configured as a platform-like structure; Figure 2 As shown, the coating head 2 is configured as a strip structure, and is placed horizontally on the top of the machine base 1 during installation to facilitate coating, and is spaced apart from the top of the machine base 1 to avoid affecting the passage of the substrate; wherein the first branch head 21 is configured as a T-shaped plate structure, and the second branch head 22 is configured as a plate structure, the first branch head 21 is configured in parallel with the second branch head 22 during installation, and the bottoms of the first branch head 21 and the second branch head 22 are both configured at an angle, so that the bottom of the coating head 2 forms a V-shape, and the small end of the V-shape faces the top of the machine base 1, so as to be able to better smooth the paint on the substrate.

[0025] like Figure 4 As shown, an arc-shaped groove is provided on the left plate surface of the second branch head 22, and a material storage area 23 is formed at the arc-shaped groove; a strip hole is opened parallel to and through the top of the coating head 2, the strip hole passes through the arc-shaped groove, and a conveying channel 24 is formed in the lower half of the strip hole; a coating lip 25 is formed at the bottom of the strip hole.

[0026] like Figure 5 As shown, the cleaning knife 3 is configured as an inverted L-shaped strip structure, wherein one of the cleaning knives 3 is inserted in parallel on the right plate surface of the first sub-head 21 during installation, and is arranged close to the bottom, the turning section of the cleaning knife 3 is arranged to the left, and is perpendicular to the right plate surface of the first sub-head 21, and the other cleaning knife 3 is inserted in parallel on the left plate surface of the second sub-head 22 during installation, and is arranged close to the bottom, the turning section of the cleaning knife 3 is arranged to the right, and is perpendicular to the left plate surface of the second sub-head 22, and the two cleaning knives 3 are symmetrically distributed.

[0027] When the coating machine is coating normally, the two cleaning knives 3 are in the first working state. Figure 5 As shown, the two cleaning knives 3 are arranged at intervals; when the coating machine is stopped, the two cleaning knives 3 are in the second working state, such as Fig. 9 As shown, the two cleaning knives 3 are blocked together at the conveying channel 24; before the coating machine is restarted after stopping, the two cleaning knives 3 are in the third working state, such as Figure 8 As shown, the two cleaning knives 3 are inserted into the coating lip 25 alternately and periodically.

[0028] During use, first, the two cleaning knives 3 are adjusted by the adjustment mechanism to switch from the second working state to the third working state. When the two cleaning knives 3 are in the third working state, the two cleaning knives 3 are periodically and alternately inserted into the coating lip 25 to clean the crystals at the coating lip 25 to avoid affecting the next work of the coating head 2; after the cleaning is completed, the two cleaning knives 3 are adjusted by the adjustment mechanism to switch from the third working state to the first working state. When the two cleaning knives 3 are in the first working state, the two cleaning knives 3 are arranged at intervals to smooth the conveying channel 24; then the substrate is placed on the machine base 1, and the substrate is driven to move in the direction close to the coating head 2, and at the same time, paint is injected into the storage area 23, and the paint is under the influence of gravity and subsequent paint. Under the joint push of the coating head 2, the coating material passes through the conveying channel 24 and is sprayed from the coating lip 25; when the substrate passes under the coating head 2, the coating sprayed from the coating lip 25 is synchronously coated on the substrate, and as the substrate continues to move, the bottom of the coating head 2 gradually smoothes the coating on the substrate, thereby achieving uniform coating; after the coating is completed, the two cleaning knives 3 are adjusted by the adjustment mechanism to switch from the first working state to the second working state. When the two cleaning knives 3 are in the second working state, the two cleaning knives 3 are jointly blocked at the conveying channel 24, while isolating the coating in the storage area 23, preventing the coating from continuing to move to the coating lip 25 under the action of gravity, and preventing the accumulation of crystals at the coating lip 25 to affect the next operation of the coating head 2.

[0029] In some embodiments, the adjustment mechanism is configured to include two slide grooves (not shown) and two slide rods (not shown), the two slide grooves are respectively arranged on the first branch head 21 and the second branch head 22, and are respectively located on both sides of the conveying channel 24; the two slide rods are respectively fixed on the two cleaning knives 3, and are respectively slidably inserted in the two slide grooves.

[0030] Specifically in this embodiment, the slide groove is set as an inverted L-shaped structure, the turning section of the slide groove on the first branch 21 is set to the left and is perpendicular to the right plate surface of the first branch 21; the turning section of the slide groove on the second branch 22 is set to the right and is perpendicular to the left plate surface of the second branch 22; the sliding rod is set to a columnar structure, one of the sliding rods is vertically set on the end surface of the first branch 21, and the other sliding rod is vertically set on the end surface of the second branch 22; the two slide grooves are symmetrically distributed.

[0031] When the coater is coating normally, the two cleaning knives 3 are in the first working state, and the slide bar is located at the end of the turning section of the slide groove; when the coater is stopped, the two cleaning knives 3 are in the second working state, and the slide bar is located at the connection between the turning section and the vertical section of the slide groove; before the coater is restarted after stopping, the two cleaning knives 3 are in the third working state, and the slide bar moves back and forth between the end of the turning section of the slide groove and the end of the vertical section.

[0032] In a further embodiment, the adjustment mechanism is configured to further include a driving member, and the driving member is configured to provide a driving force for the slide bar to slide in the slide groove.

[0033] Specifically in this embodiment, the driving member can be set as an air pump or a hydraulic pump, and the air pump or the hydraulic pump is configured to fill gas or liquid into the slide grooves on both sides of the slide rod to push the slide rod to slide inside the slide groove, and at the same time as switching the position of the slide rod inside the slide groove, switch the working state of the two cleaning knives 3.

[0034] In other embodiments, during the coating process, the presence of bubbles in the coating will have many effects on the coating process: first, the bubbles will cause unevenness on the coating surface, such as unevenness, small holes or bubbles, which will seriously affect the aesthetics and quality of the coating; second, the bubbles will reduce the density and adhesion of the coating, making the coating more susceptible to wear and corrosion, thereby reducing the durability and corrosion resistance of the product; in addition, the bubbles may also hinder the dispersion of pigments or fillers, affecting the overall quality of the coating; in order to reduce the impact of bubbles contained in the coating on the coating quality, the coating machine is configured to also include an exhaust mechanism, and the exhaust mechanism is configured to be able to discharge bubbles entrained in the coating stored in the storage area 23.

[0035] When in use, the air bubbles contained in the coating stored in the material storage area 23 can be discharged through the exhaust mechanism, which is beneficial to improving the coating quality.

[0036] In a further embodiment, the exhaust mechanism is configured to include a first pipe hole 41, which is arranged on the second branch head 22, and one end of the first pipe hole 41 is connected to the bottom of the storage area 23, and the other end is connected to the position of the cleaning knife 3 on the second branch head 22.

[0037] Specifically in this embodiment, Figure 4 As shown, the first tube hole 41 is set as an arc structure with the convex surface facing right. The first tube hole 41 is set below the arc-shaped groove, and the top end passes through the lower side wall of the arc-shaped groove, and the bottom end passes through the groove formed on the second branch head 22 for assembly with the cleaning knife 3.

[0038] During use, when the two cleaning knives 3 are in the first working state, the two cleaning knives 3 are arranged at intervals to pass through the conveying channel 24, and then the paint is injected into the storage area 23. Under the joint push of gravity and subsequent paint, the paint passes through the conveying channel 24 and is sprayed out from the coating lip 25 on the one hand, and enters the first tube hole 41 on the other hand.

[0039] When the two cleaning knives 3 are in the third working state, the two cleaning knives 3 are periodically and alternately inserted into the coating lip 25; in the process of moving the cleaning knife 3, when the cleaning knife 3 on the second branch head 22 is separated from the second branch head 22, the paint in the first tube hole 41 flows into the trough on the second branch head 22 under the action of gravity; when the cleaning knife 3 on the second branch head 22 returns to the second branch head 22, the cleaning knife 3 synchronously squeezes the paint in the trough on the second branch head 22, which can, on the one hand, burst the bubbles, making the paint tighter, and at the same time, allow part of the gas in the bubbles to pass through the coating lip 25 and move to the outside to achieve exhaust, and on the other hand, can squeeze the paint back into the first tube hole 41, and then squeeze the paint back into the storage area 23, and repeat the cycle to achieve continuous exhaust.

[0040] In a further embodiment, in order to improve the utilization rate of the paint, the exhaust mechanism is configured to also include a material return assembly, and the material return assembly is configured to be able to transport the paint in the first tube hole 41 back to the material storage area 23 from the top.

[0041] When in use, the paint in the first tube hole 41 can be transported from the top back to the material storage area 23 through the material return assembly, which can reduce paint waste and improve defoaming efficiency.

[0042] In a further embodiment, the return material component is configured to include a second tube hole 421, a first one-way valve 422 and a second one-way valve 423, one end of the second tube hole 421 is connected to the top of the material storage area 23, and the other end is connected to the first tube hole 41; the first one-way valve 422 is inserted in the first tube hole 41, and is located at the connection point between the first tube hole 41 and the material storage area 23, and the opening direction of the first one-way valve 422 is from the material storage area 23 to the first tube hole 41; the second one-way valve 423 is inserted in the second tube hole 421, and is located at the connection point between the second tube hole 421 and the material storage area 23, and the opening direction of the second one-way valve 423 is from the second tube hole 421 to the material storage area 23.

[0043] Specifically in this embodiment, Figure 4 As shown, the second tube hole 421 is set to an arc-shaped structure, and the convex surface is set to the right. The second tube hole 421 is set on the right side of the arc-shaped groove, and the top end is located above the arc-shaped groove and passes through the strip hole. The bottom end passes through the part of the first tube hole 41 close to the top, so that the first tube hole 41 and the second tube hole 421 together form a "Y"-shaped structure; the first one-way valve 422 is set at the top of the first tube hole 41; the second one-way valve 423 is set at the top of the second tube hole 421.

[0044] During use, when the two cleaning knives 3 are in the first working state, the two cleaning knives 3 are arranged at intervals to pass through the conveying channel 24, and then the paint is injected into the storage area 23. Under the joint push of gravity and subsequent paint, the paint passes through the conveying channel 24 and is sprayed from the coating lip 25 on the one hand, and on the other hand, opens the first one-way valve 422 and enters the first tube hole 41.

[0045] When the two cleaning knives 3 are in the third working state, the two cleaning knives 3 are periodically and alternately inserted into the coating lip 25; in the process of the cleaning knife 3 moving, when the cleaning knife 3 on the second branch head 22 is separated from the second branch head 22, the paint in the first tube hole 41 flows into the sink groove on the second branch head 22 under the action of gravity; when the cleaning knife 3 on the second branch head 22 returns to the second branch head 22, the cleaning knife 3 synchronously squeezes the paint in the sink groove on the second branch head 22, which can squeeze out the bubbles on the one hand, making the paint more compact, and at the same time, allowing the gas in some bubbles to pass through. The coating lip 25 moves to the outside to achieve exhaust, and on the other hand, the paint can be squeezed back into the first tube hole 41. At this time, the first one-way valve 422 is closed and the second one-way valve 423 is opened, so that the paint can pass through the first tube hole 41 and the second tube hole 421 in turn and fall back from the top to the storage area 23, over and over again. While achieving continuous exhaust, the exhausted paint is transported back to the storage area 23 from the top through the second tube hole 421, so that most of the paint entering the first tube hole 41 is paint containing bubbles, which helps to reduce ineffective exhaust and improve exhaust efficiency.

[0046] It can be understood that in order to prevent the movement of the cleaning knife 3 from causing the paint in the storage area 23 to leak directly from the coating lip 25, a solenoid valve can be set at the conveying channel 24, so that when the cleaning knife 3 is in the third working state, the solenoid valve is closed to cut off the conveying channel 24; when the cleaning knife 3 is in the first working state, the solenoid valve is opened to smooth the conveying channel 24.

[0047] In a further embodiment, in order to improve the defoaming efficiency, the number of the first tube holes 41 and the second tube holes 421 are equal, and there are multiple first tube holes 41, and the multiple first tube holes 41 are arranged at intervals.

[0048] When in use, each time the cleaning knife 3 on the second branch head 22 moves, the multiple first tube holes 41 can simultaneously receive the paint at the bottom of the storage area 23, and the multiple second tube holes 421 can simultaneously transport the exhausted paint from the top back to the storage area 23, thereby increasing the amount of paint processed at a single time, thereby reducing the processing time of the paint and improving the defoaming efficiency.

[0049] In some other embodiments, the coating machine is configured to further include a feeding mechanism, which is configured to supply coating material to the material storage area 23 .

[0050] Specifically in this embodiment, the feeding mechanism is configured to include a storage barrel, a feeding pump and a feeding pipe 51. The storage barrel is arranged on the machine base 1, and paint is stored inside the storage barrel; the feeding pipe 51 is inserted on the first branch head 21 and is connected to the storage area 23; the feeding pump is arranged on the machine base 1, and the suction end of the feeding pump is connected to the storage barrel, and the discharge end of the feeding pump is connected to the feeding pipe 51.

[0051] like Figure 4 As shown, the feed pipe 51 passes through the left and right panels of the first branch head 21 during installation, and is disposed near the top to communicate with the material storage area 23 .

[0052] Specifically in this embodiment, the material extraction end of the feed pump is connected to the material storage cylinder through a pipeline, and the material discharge end of the feed pump is connected to the feed pipe 51 through a pipeline.

[0053] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows: During use, firstly, the two cleaning blades 3 are adjusted to switch from the second working state to the third working state.

[0054] When the two cleaning knives 3 are in the third working state, the air pump is started to fill gas into the slide grooves on both sides of the slide rod, so that the slide rod moves back and forth between the end of the turning section and the end of the vertical section of the slide groove, thereby making the two cleaning knives 3 periodically and alternately inserted into the coating lip 25 to clean the crystals at the coating lip 25 to avoid affecting the next operation of the coating head 2.

[0055] During the movement of the cleaning knife 3, when the cleaning knife 3 on the second branch head 22 is detached from the second branch head 22, the paint in the first tube hole 41 flows into the trough on the second branch head 22 under the action of gravity; when the cleaning knife 3 on the second branch head 22 returns to the second branch head 22, the cleaning knife 3 synchronously squeezes the paint in the trough on the second branch head 22, which can, on the one hand, burst the bubbles, making the paint tighter, and thereby allow part of the gas in the bubbles to pass through the coating lip 25 and move to the outside to achieve exhaust, and on the other hand, squeeze the paint back into the first tube hole 41. At this time, the first one-way valve 422 is closed and the second one-way valve 423 is opened, so that the paint can pass through the first tube hole 41 and the second tube hole 421 in turn and fall back from the top to the storage area 23, over and over again, to achieve continuous exhaust.

[0056] After the cleaning is completed, the two cleaning knives 3 are adjusted to switch from the third working state to the first working state.

[0057] When switching the working state, start the air pump, and fill the vertical section of the slide with gas, so that the slide rod moves to the end of the turning section of the slide, and then the two cleaning knives 3 are arranged at intervals to smooth the conveying channel 24; then place the substrate on the machine base 1, and drive the substrate to move in the direction close to the coating head 2; then start the feed pump, and the feed pump conveys the paint in the storage barrel into the storage area 23. On the one hand, the paint in the storage area 23 passes through the conveying channel 24 and is sprayed from the coating lip 25 under the joint push of gravity and subsequent paint, and on the other hand, the first one-way valve 422 is opened to enter the first tube hole 41; when the substrate passes under the coating head 2, the paint sprayed from the coating lip 25 is simultaneously coated on the substrate, and as the substrate continues to move, the bottom of the coating head 2 gradually smoothes the paint on the substrate to achieve uniform coating.

[0058] After coating is completed, the two cleaning knives 3 are adjusted to switch from the first working state to the second working state.

[0059] When switching the working state, start the air pump, and fill the turning section of the slide with gas, so that the slide rod moves to the connection between the vertical section and the turning section of the slide, and then the two cleaning knives 3 are jointly blocked at the conveying channel 24, while isolating the paint in the storage area 23, and preventing the paint from continuously moving toward the coating lip 25 under the action of gravity, and preventing the accumulation of crystals at the coating lip 25, which affects the next operation of the coating head 2.

[0060] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A coating machine, characterized in that: The coating machine comprises: Machine base; A coating head is arranged on the machine base, the coating head comprises a first sub-head and a second sub-head, a material storage area, a conveying channel and a coating lip are formed between the first sub-head and the second sub-head, the material storage area is configured to receive the coating; the conveying channel connects the material storage area and the coating lip; the coating lip is configured to spray the coating; Two cleaning knives are respectively inserted into the first sub-head and the second sub-head, and are respectively located on both sides of the conveying channel; the two cleaning knives are configured to have a first working state, a second working state and a third working state according to the use of the coater. When the coater is coating normally, the two cleaning knives are in the first working state, and the two cleaning knives are arranged at intervals; when the coater is stopped, the two cleaning knives are in the second working state, and the two cleaning knives jointly block the conveying channel; after the coater is stopped and before it is restarted, the two cleaning knives are in the third working state, and the two cleaning knives are periodically and alternately inserted into the coating lip to clean the crystals on the coating lip; An adjustment mechanism, wherein the adjustment mechanism is configured to switch the working states of the two cleaning knives; The adjustment mechanism includes two slide grooves and two slide rods. The two slide grooves are respectively arranged on the first branch head and the second branch head, and are respectively located on both sides of the conveying channel; the two slide rods are respectively fixedly arranged on the two cleaning knives, and are respectively slidably inserted into the two slide grooves.

2. The coating machine according to claim 1, characterized in that: The adjustment mechanism further includes a driving member configured to provide a driving force for the slide bar to slide in the slide groove.

3. The coating machine according to claim 1, characterized in that: The coating machine further includes an exhaust mechanism configured to exhaust bubbles contained in the coating material stored in the material storage area.

4. The coating machine according to claim 3, characterized in that: The exhaust mechanism comprises a first pipe hole, which is arranged on the second branch head, and one end of the first pipe hole is connected to the bottom of the material storage area, and the other end is connected to the position where the cleaning knife on the second branch head is located.

5. The coating machine according to claim 4, characterized in that: The exhaust mechanism further comprises a material return assembly configured to transport the coating material in the first tube hole back to the material storage area from the top.

6. The coating machine according to claim 5, characterized in that: The return material assembly includes a second tube hole, a first one-way valve and a second one-way valve, one end of the second tube hole is connected to the top of the material storage area, and the other end is connected to the first tube hole; the first one-way valve is inserted in the first tube hole and is located at the connection point between the first tube hole and the material storage area, and the opening direction of the first one-way valve is from the material storage area to the first tube hole; the second one-way valve is inserted in the second tube hole and is located at the connection point between the second tube hole and the material storage area, and the opening direction of the second one-way valve is from the second tube hole to the material storage area.

7. The coating machine according to claim 6, characterized in that: The number of the first tube holes and the number of the second tube holes are equal, and both are in plurality, and the plurality of first tube holes are arranged at intervals.

8. The coating machine according to claim 1, characterized in that: The coating machine further includes a feeding mechanism configured to supply the coating material to the material storage area.

9. The coating machine according to claim 8, characterized in that: The feeding mechanism includes a storage barrel, a feeding pump and a feeding pipe. The storage barrel is arranged on the machine base, and the paint is stored inside the storage barrel; the feeding pipe is inserted into the first branch head and is connected to the storage area; the feeding pump is arranged on the machine base, the suction end of the feeding pump is connected to the storage barrel, and the discharge end of the feeding pump is connected to the feeding pipe.

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