Multi-drying coating machine

Abstract

The invention relates to the technical field of coating machines, and discloses a multi-drying coating machine which comprises a supporting plate body, a base material roller, a composite drying machine and a discharging roller, the two ends of the supporting plate body are rotationally connected with the base material roller and the discharging roller respectively, the composite drying machine is arranged between the base material roller and the discharging roller, a tension shaft is arranged between the base material roller and the composite drying machine, and the tension shaft is connected with the supporting plate body. A coating mechanism is arranged on one side of the tension shaft and comprises a rotary coating roller, a supporting base and a comma scraper, a coating base material is arranged between the rotary coating roller and the supporting base, the comma scraper is arranged on one side of the rotary coating roller, and ultrasonic vibration modules are arranged on the upper side and the lower side of the comma scraper; the ultrasonic vibration module changes an electromagnetic field around the comma scraper to enable the surface of the comma scraper to generate high-frequency vibration; the high-frequency vibration of the comma scraper not only optimizes the distribution of the coating, but also enhances the interaction between the coating and the base material, and effectively promotes the contact and permeation between coating molecules and the coating base material.

Description

Technical Field

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

[0002] Coating machine is an important coating equipment, mainly used for surface coating process production of substrates such as film, paper, wood board, glass, leather, aluminum, plastic film, etc. It coats the rolled substrate with a layer of glue, coating or ink with specific functions, and then rewinds or cuts it into sheets after drying. The coating machine adopts a special multi-functional coating head, which can realize various forms of surface coating. Its rewinding and unwinding are equipped with full-speed automatic film splicing mechanism, and the tension closed-loop automatic control is realized through PLC program. According to different coating methods and application scenarios, there are many types of coating machines, such as brush coater, air knife coater, blade coater, roller coater, spray coater, curtain coater and slit coater. These different types of coating machines have their own characteristics in coating process, coating effect, scope of application, etc., which can meet the needs of different industries and customers.

[0003] However, existing multi-drying coaters are usually used in places with high requirements for coating quality, such as perovskite batteries and other fields. These fields have strict requirements on the uniformity, adhesion and protective performance of the coating, and the two major problems often encountered by this multi-drying coater during the coating process are uneven coating and bubbles in the coating. Uneven coating often occurs when using coatings with unstable viscosity and large particle size, or when the coating roller is worn, the pressure is uneven, the speed is improper, and the roller surface is uneven or the motor speed is uneven, which will lead to inconsistent coating thickness and affect the appearance and performance of the product. Bubbles in the coating will affect the adhesion and protective performance of the coating, thereby shortening the service life of the product. If a simple vibration structure is used to vibrate the coating roller or scraper to improve the coating quality.

[0004] For example, Chinese patent CN201521084858.7 proposes a smoothing mechanism for a coating machine, which includes a base, a tool holder, a smoothing blade and an ultrasonic generator. The tool holder is fixedly mounted on the base, the smoothing blade is fixedly mounted on the tool holder, and the ultrasonic generator is fixedly mounted on the base and the tool holder. However, since the ultrasonic generator indirectly drives the smoothing blade to vibrate through the base, the tool holder and other structures, the energy loss is very large and serious noise may be caused. In addition, the vibration frequency and direction of the ultrasonic generator may be limited by the design of the overall structure, and the control accuracy is relatively low. At the same time, this ultrasonic generator structure is very prone to failure. Summary of the invention

[0005] (I) Technical problems to be solved: In view of the shortcomings of the prior art, the present invention provides a multi-drying coating machine, which has the advantages of uniform coating thickness and strong adhesion, can effectively remove bubbles in the coating, has low maintenance cost and low failure rate, and solves the problems of uneven coating, unstable coating viscosity, bubbles inside the coating, high cost and high failure rate.

[0006] (II) Technical solution: In order to achieve the above-mentioned purpose of uniform coating thickness and strong adhesion, effective removal of bubbles in the coating, and low maintenance cost, the present invention provides the following technical solution: a multiple drying coating machine, including a support plate, a substrate roller, a composite dryer, and a discharge roller, wherein the two ends of the support plate are respectively rotatably connected with a substrate roller for winding up an initial unprocessed coated substrate and a discharge roller for winding up a processed substrate, a composite dryer is arranged between the substrate roller and the discharge roller, and the composite dryer is fixedly installed on the support plate, the coated substrate on the substrate roller passes through the composite dryer and is wound on the discharge roller, and the substrate roller and the composite dryer are connected to each other. A feed tension shaft and a discharge tension shaft are arranged between the feed tension shaft and the discharge tension shaft, a coating mechanism is arranged between the feed tension shaft and the discharge tension shaft, the coating mechanism includes a transfer roller, a support base, and a comma scraper, the coating substrate is arranged between the transfer roller and the support base, the comma scraper is arranged on one side of the transfer roller, the surface of the transfer roller is provided with coating, the comma scraper head is attached above the coating substrate, and ultrasonic vibration modules are arranged on the upper and lower sides of the comma scraper, the comma scraper has a built-in magnetic core, the ultrasonic vibration module changes the electromagnetic field around the comma scraper to make the surface of the comma scraper generate high-frequency vibrations, thereby evenly covering the coating on the coating substrate.

[0007] Preferably, the ultrasonic vibration module includes a base magnet and an adsorption magnet, the base magnet is slidably arranged under the support base, and both ends of the base magnet are slidably connected to the support plate, a cylindrical coating chamber and an annular discharge chamber are arranged inside the transfer roller, the discharge chamber is arranged between the transfer roller and the coating chamber, the adsorption magnet is arranged in the discharge chamber, the adsorption magnet is rotatably connected to both ends of the coating chamber, the magnetic field generated by the adsorption magnet and the base magnet acts together on the comma scraper, the adsorption magnet and the base magnet are both electromagnets, when they generate an electromagnetic field, the comma scraper vibrates.

[0008] Preferably, when the adsorption magnet and the base magnet generate an electromagnetic field, the comma scraper is heated to generate heat; and the distance and angle between the comma scraper head and the coating substrate are adjusted by controlling the strength and angle of the electromagnetic field generated by the adsorption magnet and the base magnet on the comma scraper.

[0009] Preferably, the transfer roller is rotatably connected to the discharge chamber, and a discharge hole is provided at the bottom of the discharge chamber, the discharge hole is communicated with the surface of the transfer roller, and a connecting hole connected to the discharge chamber is provided at the top of the coating chamber.

[0010] Preferably, both ends of the comma scraper are rotatably connected to a sliding knife holder, the sliding knife holder is slidably assembled on a supporting plate body, and an elastic buffer structure is provided between the comma scraper and the sliding knife holder.

[0011] Preferably, the coating cavity structure is made of ferromagnetic metal, and the adsorption magnet heats the coating cavity when generating an electromagnetic field.

[0012] Preferably, both ends of the transfer roller are rotatably connected to the support plate body, and the transfer roller can slide in a vertical direction relative to the support plate body.

[0013] Preferably, the adsorption magnet and the base magnet can both rotate to adjust the angle of the electromagnetic field of the comma scraper, and the comma scraper is symmetrically arranged in two groups on both sides of the transfer roller, the base magnet is symmetrically arranged in two groups on both sides of the transfer roller, and the adsorption magnet is symmetrically arranged in two groups in the discharge chamber; the electromagnetic field periods generated by the adsorption magnets and the base magnets on both sides are equal, and the current and voltage changes are opposite, so that the comma scrapers on both sides generate equal vibration frequencies and opposite vibration directions.

[0014] Preferably, the transfer roller is rotatably connected to the support plate body, and the support base is fixedly mounted on the support plate body.

[0015] Preferably, the coating chamber is connected to a container containing coating.

[0016] (III) Beneficial effects: Compared with the prior art, the present invention provides a multiple drying coating machine, which has the following beneficial effects: 1. The multiple drying coating machine, through the coordinated use of the comma scraper structure, the base magnet structure, and the adsorption magnet structure, the high-frequency vibration of the comma scraper not only optimizes the distribution of the coating, but also enhances the interaction between the coating and the substrate. The vibration effectively promotes the contact and penetration between the coating molecules and the coated substrate. This intermolecular interaction enhances the bonding force between the coating and the substrate, making the coating more firmly attached to the substrate, which not only improves the uniformity of the coating, but also enhances the adhesion of the coating, thereby improving the overall coating effect of the coating machine. In addition, by adjusting the current size, direction and frequency of the base magnet and the adsorption magnet, the vibration amplitude and frequency of the comma scraper can be precisely controlled to adapt to different coating requirements and substrate characteristics.

[0017] 2. The multi-drying coating machine uses a comma scraper structure, a base magnet structure, and an adsorption magnet structure to increase the temperature of the comma scraper through electromagnetic induction heating. By utilizing the thermal expansion effect and the change in coating viscosity, the scraper can more evenly scrape off excess coating when scraping off excess coating layer, so that the coating layer is more evenly distributed on the substrate, thereby improving the quality of the coating. Electromagnetic induction heating does not require an internal heating structure, simplifies the design of the comma scraper, and avoids equipment downtime and maintenance costs caused by heating module failure. The maintenance cost of electromagnetic induction heating is also relatively low, reducing its manufacturing complexity and cost. In addition, electromagnetic induction heating is fast and uniform, which can quickly increase the temperature of the comma scraper to meet the heating requirements during the coating process and effectively reduce the subsequent coating drying time.

[0018] 3. The multiple drying coating machine controls the comma scraper through the electromagnetic field by using the adsorption magnet structure and the base magnet structure, without the need for physical contact adjustment, thus simplifying the equipment structure, thereby reducing the possibility of mechanical wear and failure, and extending the service life of the equipment. At the same time, it makes it easier to disassemble and replace the comma scraper after wear, without the need for additional mechanical adjustment steps, thereby improving maintenance efficiency. In addition, the comma scraper is driven to reciprocate along the surface of the coated substrate by the periodically changing magnetic field generated by the adsorption magnet and the base magnet during rotation, thereby improving the contact between the coating and the substrate, promoting the interaction between the coating molecules and the substrate molecules, enhancing the adhesion of the coating, and being able to promptly correct the defective position of the coating, thereby reducing the secondary repair work caused by uneven coating, thereby greatly improving the coating efficiency and coating quality.

[0019] 4. The multiple drying coating machine uses a comma scraper structure in conjunction with a transfer roller structure. During the coating process, various factors, such as wear of the coating roller and changes in coating viscosity, may cause minor defects in the coating. The reciprocating vibration generated by the comma scrapers on both sides of the present invention vibrating in opposite directions can correct these defective locations in time and reduce secondary repair work caused by uneven coating. The reciprocating vibration can make the coating evenly distributed on the surface of the coating substrate, especially the accumulated coating under the transfer roller due to the high pressure between the transfer roller and the supporting base will be more easily coated on the coating substrate under the action of vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the multiple drying coating machine in the present invention.

[0021] Figure 2 It is a structural front view of the multiple drying coating machine in the present invention.

[0022] Figure 3 It is a three-dimensional schematic diagram of the coating structure in the present invention.

[0023] Figure 4 It is a front view of the coating structure in the present invention.

[0024] Figure 5 It is a cross-sectional view of the coating structure in the present invention.

[0025] Figure 6 It is a schematic diagram of the coating structure of the present invention during coating processing.

[0026] In the figure: 1. support plate; 2. substrate roller; 3. discharge roller; 4. composite dryer; 5. coating substrate; 6. tension shaft; 7. coating mechanism; 71. transfer roller; 711. coating chamber; 712. discharge chamber; 713. discharge hole; 714. connecting hole; 72. support base; 73. comma scraper; 74. base magnet; 75. adsorption magnet; 76. sliding knife holder. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 6A multiple drying coating machine includes a support plate body 1, a substrate roller 2, a composite dryer 4, and a discharge roller 3. The two ends of the support plate body 1 are rotatably connected with the substrate roller 2 for winding up the initial unprocessed coated substrate 5 and the discharge roller 3 for winding up the processed substrate. The substrate roller 2 is responsible for providing the unprocessed coated substrate 5, while the discharge roller 3 is responsible for collecting the processed substrate. The two realize a continuous and stable conveying process through the rotation connection on the support plate body 1. A composite dryer 4 is arranged between the substrate roller 2 and the discharge roller 3. The composite dryer 4 is fixedly mounted on the support plate body 1. The coated substrate 5 on the substrate roller 2 passes through the composite dryer 4 and is wound on the discharge roller 3. After being processed by the coating mechanism 7, the coated substrate 5 needs to be dried by the composite dryer 4 before it can be wound on the discharge roller 3 for subsequent processing or use. A feed tension shaft 6 and a discharge tension shaft 6 are arranged between the substrate roller 2 and the composite dryer 4. The feed tension shaft 6 and the discharge tension shaft 6 can adjust the tension of the coating substrate 5 to ensure that it remains stable and does not relax during the transportation process, thereby improving the coating quality. A coating mechanism 7 is arranged between the feed tension shaft 6 and the discharge tension shaft 6. The coating mechanism 7 includes a transfer roller 71, a support base 72, and a comma scraper 73. The coating substrate 5 is arranged between the transfer roller 71 and the support base 72. The comma scraper 73 is arranged on one side of the transfer roller 71. The comma scraper 73 can be close to the surface of the coating substrate 5, and the coating on the transfer roller 71 is scraped flat and evenly distributed on the substrate, thereby ensuring the uniformity and adhesion of the coating. The surface of the transfer roller 71 is provided with coating. The transfer roller 71 is a key component of the coating mechanism 7. The coating arranged on its surface will be evenly coated on the substrate during the rotation process to form the required coating. The blade head of the comma scraper 73 is attached to the top of the coated substrate 5. The blade head of the comma scraper 73 is attached to the top of the coated substrate 5 and can be in close contact with the coating layer. The coating can be flattened and evenly distributed by the movement of the scraper. Ultrasonic vibration modules are provided on the upper and lower sides of the comma scraper 73. The ultrasonic vibration module can change the electromagnetic field around the comma scraper 73, causing the scraper surface to generate high-frequency vibrations. This vibration helps the paint molecules to better penetrate into the substrate and improve the adhesion of the coating. The comma scraper 73 is built with a magnetic core, which can respond to the changes in the electromagnetic field generated by the ultrasonic vibration module, thereby driving the comma scraper 73 to vibrate. The ultrasonic vibration module changes the electromagnetic field around the comma scraper 73, causing the surface of the comma scraper 73 to generate high-frequency vibrations, thereby evenly covering the coating on the coated substrate 5.

[0029] See also Figure 3-Figure 6The ultrasonic vibration module includes a base magnet 74 and an adsorption magnet 75. The base magnet 74 is slidably arranged under the support base 72, and the two ends of the base magnet 74 are slidably connected to the support plate body 1. This design enables the base magnet 74 to flexibly adjust its position so as to cooperate with the adsorption magnet 75 to generate the required electromagnetic field, thereby driving the comma scraper 73 to vibrate at high frequency. The sliding connection method ensures the stability and reliability of the base magnet 74 during the adjustment process. A cylindrical coating chamber 711 and an annular discharge chamber 712 are arranged inside the transfer roller 71. The discharge chamber 712 is arranged between the transfer roller 71 and the coating chamber 711. The coating chamber 711 is used to store the coating, and the discharge chamber 712 is responsible for evenly conveying the coating to the surface of the transfer roller 71. This design ensures that the coating can be continuously and stably supplied to the coating substrate 5, thereby achieving a high-quality coating effect. An adsorption magnet 75 is provided in the discharge chamber 712. The adsorption magnet 75 is rotatably connected to both ends of the coating chamber 711. The adsorption magnet 75 and the base magnet 74 work together to generate an electromagnetic field, which is not only used to drive the comma scraper 73 to vibrate, but also to heat the coating chamber 711. The rotational connection method allows the adsorption magnet 75 to remain stable when the transfer roller 71 rotates. The magnetic field generated by the adsorption magnet 75 and the base magnet 74 acts on the comma scraper 73 together. The adsorption magnet 75 and the base magnet 74 are both electromagnets. The design of the electromagnet allows the magnetic field strength and direction to be flexibly adjusted by controlling the current size and direction, thereby achieving precise control of the vibration frequency, amplitude and angle of the comma scraper 73. When it generates an electromagnetic field, the comma scraper 73 vibrates. When the adsorption magnet 75 and the base magnet 74 generate an electromagnetic field, the comma scraper 73 is heated to generate heat; the distance and angle between the blade head of the comma scraper 73 and the coating substrate 5 are adjusted by controlling the strength and angle of the electromagnetic field generated by the adsorption magnet 75 and the base magnet 74 on the comma scraper 73. The coating cavity 711 structure is made of ferromagnetic metal, which can generate a magnetic induction heating effect under the action of the electromagnetic field, thereby achieving heating of the coating cavity 711. The heated coating is more easily evenly distributed on the transfer roller 71 and can better penetrate into the coating substrate 5.

[0030] See also Figure 3-Figure 6The adsorption magnet 75 and the base magnet 74 can both rotate to adjust the angle of the electromagnetic field on the comma scraper 73. By adjusting the angles of the adsorption magnet 75 and the base magnet 74, the direction and magnitude of the force of the electromagnetic field generated by them on the comma scraper 73 can be changed, thereby achieving precise control of the vibration of the comma scraper 73. Two groups of comma scrapers 73 are symmetrically arranged on both sides of the transfer roller 71, and one group of comma scrapers 73 is arranged on the side of the coating substrate 5 that has not been coated, and one group of comma scrapers 73 is arranged on the side of the transfer roller 71 after coating, which is not coated. The comma scrapers 73 can pre-press the coating substrate 5 on the supporting base 72 and scrape off the excess part of the coating substrate 5; on the side after coating, the comma scrapers 73 further flatten the coating, and the base magnets 74 are symmetrically arranged in two groups on both sides of the transfer roller 71. The adsorption magnets 75 on both sides and the base magnets 74 generate electromagnetic fields with equal periods and opposite current and voltage changes, so that the comma scrapers 73 on both sides generate equal vibration frequencies and opposite vibration directions. This vibration is to produce mutually offset vibration effects during the coating process, thereby reducing the impact and damage to the coating substrate 5. When the comma scrapers 73 on both sides vibrate at equal frequencies but in opposite directions, their forces on the coated substrate 5 will cancel each other out, thereby reducing the friction and damage of the coated substrate 5 caused by the high-frequency vibration on one side. At the same time, this vibration mode also helps to evenly distribute and penetrate the coating on the coated substrate 5.

[0031] See also Figure 1-Figure 6, the two ends of the transfer roller 71 are rotatably connected to the support plate body 1, and the transfer roller 71 can slide in the vertical direction relative to the support plate body 1. The transfer roller 71 is rotatably connected to the support plate body 1, and the support base 72 is fixedly installed on the support plate body 1. The fixed installation of the support base 72 provides stable support, ensures the stability and accuracy of the coating mechanism 7, and thus ensures the coating quality. The coating chamber 711 is connected to a container filled with coating. The coating in the container is supplied to the transfer roller 71 through the coating chamber 711, which is convenient for controlling and adjusting the flow rate and coating thickness of the coating. The transfer roller 71 is rotatably connected to the discharge chamber 712, and a discharge hole 713 is provided at the bottom of the discharge chamber 712, and the discharge hole 713 is communicated with the surface of the transfer roller 71, and a connecting hole 714 connected to the discharge chamber 712 is provided at the top of the coating chamber 711. This design ensures that the coating flows evenly from the coating chamber 711 into the discharge chamber 712, and is evenly applied to the surface of the transfer roller 71 through the discharge hole 713. The design of the rotating connection and the communicating holes enables the coating to be continuously and stably supplied to the transfer roller 71, ensuring the smooth progress of the coating process. The two ends of the comma scraper 73 are rotatably connected with a sliding knife holder 76, and the sliding knife holder 76 is slidably assembled on the support plate body 1. An elastic buffer structure is arranged between the comma scraper 73 and the sliding knife holder 76. The elastic buffer structure can effectively reduce the shaking caused by the high-frequency vibration of the comma scraper 73, thereby improving the durability of the equipment. The elastic buffer structure can effectively reduce the shaking caused by the high-frequency vibration of the comma scraper 73, and improve the stability and durability of the equipment. It can also alleviate the impact force during the coating process, protect the comma scraper 73 and the coating substrate 5 from damage, thereby extending the service life of the equipment. Since high-frequency vibration is one of the characteristics of the work of the comma scraper 73, excessive shaking will affect the coating effect and the life of the equipment. The elastic buffer structure reduces the impact of shaking on the equipment by absorbing and dispersing vibration energy, thereby improving the stability and durability of the equipment.

[0032] Working principle: During the coating process, the coated substrate 5 is first transported to the coating structure position through the cooperation of the substrate roller 2 and the discharge roller 3, and the tension of the coated substrate 5 is controlled by the tension shaft 6. When the coated substrate 5 passes through the coating structure, it is coated. After the coating process, the coated substrate 5 is then dried by the composite dryer 4 and then rolled up by the discharge roller 3.

[0033] Among them, when the coated substrate 5 is being coated, the coated substrate 5 will pass through the coating mechanism 7, the transfer roller 71 will apply the coating on the surface of the coated substrate 5, and then the comma scraper 73 will scrape off the coating layer and make it evenly coated on the coated substrate 5. In the process of scraping off the excess coating layer by the comma scraper 73, an electromagnetic field will be formed between them by energizing the base magnet 74 and the adsorption magnet 75. In the electromagnetic field, the comma scraper 73 will be subjected to a periodically changing force. This force is caused by the fluctuation of the electromagnetic field, and because the intensity and direction of the electromagnetic field will change with the change of the current. When the current changes at a high frequency, the electromagnetic field will also fluctuate at a corresponding frequency. As a part of the electromagnetic field, the comma scraper 73 will respond to the periodic changes therein. Due to the fluctuation of the electromagnetic field, the comma scraper 73 will be subjected to a constantly changing force, causing it to begin to vibrate at the frequency of the electromagnetic field. This vibration can keep the comma scraper 73 uniform when scraping off the excess coating layer. And by adjusting the current size, direction and frequency of the base magnet 74 and the adsorption magnet 75, the vibration amplitude and frequency of the comma scraper 73 can be accurately controlled. This high-frequency vibration can ensure that the comma scraper 73 scrapes off excess paint more evenly during the scraping process, so that the paint layer is more evenly distributed on the substrate. Since the thickness consistency of the coating is significantly improved, the quality and performance of the product are also improved accordingly. At the same time, high-frequency vibration can also break the bubbles in the paint layer, so that the bubbles dissipate quickly, and evenly disperse impurities into the paint or scrape them off from the coating surface. When the vibration energy is transmitted to the surface of the substrate, it can also promote the intermolecular interaction between the coating and the substrate, and enhance the bonding force between the coating and the substrate. Therefore, the adhesion of the coating on the substrate is improved, and the durability and protective performance of the coating are also enhanced accordingly.

[0034] When the base magnet 74 and the adsorption magnet 75 generate an electromagnetic field, eddy currents are generated inside the comma scraper 73 because the electromagnetic field is changing. These eddy currents flow inside the comma scraper 73 and generate heat due to resistance, thereby increasing the surface temperature of the comma scraper 73. After the temperature of the comma scraper 73 rises, due to the thermal expansion effect and the change in the viscosity of the paint, the scraper can scrape off the excess paint more evenly when scraping off the excess paint layer, so that the paint layer is more evenly distributed on the substrate, and the time for subsequent paint drying can be reduced, thereby improving the drying efficiency. The traditional heating method requires a heating module to be set inside the comma scraper 73, which not only increases the complexity and cost of the comma scraper 73, but also may affect its service life. Through electromagnetic induction heating, the comma scraper 73 does not need an internal heating structure, which reduces its manufacturing complexity and cost. At the same time, electromagnetic induction heating has the characteristics of fast and uniform, which can quickly increase the temperature of the comma scraper 73 to meet the heating requirements during the coating process. Since there is no need to set a heating module inside the comma scraper 73, the cost of materials and manufacturing processes is reduced. The maintenance cost of electromagnetic induction heating is also relatively low because it does not require frequent replacement of heating elements as with traditional heating methods. In addition, since electromagnetic induction heating can quickly and evenly increase the temperature of the comma scraper 73, it also improves the overall efficiency and performance of the coater.

[0035] By adjusting the size and direction of the flow generated by the base magnet 74 and the adsorption magnet 75, the direction and strength of the electromagnetic field are changed, so that the scraping distance and angle between the comma scraper 73 and the processed coated substrate 5 can be adjusted. In addition, the traditional mechanical adjustment method requires physical contact, while the electromagnetic field control does not require contact, which reduces the possibility of mechanical wear and failure. The comma scraper 73 is directly controlled by the electromagnetic field, without the need for additional motors or other drive structures, which simplifies the equipment structure and reduces costs. At the same time, due to the controllability of the electromagnetic field, the working state of the comma scraper 73 can be quickly adjusted according to different coating requirements, which improves the adaptability and flexibility of the equipment. Moreover, this non-contact structure makes it easier to disassemble and replace the comma scraper 73 without the need for additional mechanical adjustment steps. During the coating process, since the two ends of the adsorption magnet 75 are rotatably connected to the discharge chamber 712, when the coating roller rotates or an additional driving structure is installed, the adsorption magnet 75 and the base magnet 74 can be driven to rotate differentially. When the adsorption magnet 75 and the base magnet 74 are in the process of rotation, the magnetic field generated between them will also change periodically, thereby driving the comma scraper 73 to reciprocate along the surface of the coating substrate 5. This reciprocating smoothing can improve the contact between the coating and the substrate, thereby promoting the interaction between the coating molecules and the substrate molecules, enhancing the adhesion of the coating, and can correct the defective positions of the coating, reduce the secondary repair work caused by uneven coating, and improve the coating efficiency.

[0036] Moreover, in the process of the adsorption magnet 75 generating an electromagnetic field, the coating cavity 711 provided in the transfer roller 71 can also be heated at the same time, so as to realize preheating of the coating from the source, reduce the energy consumption and time cost in the subsequent drying process, and the coating will become more fluid and the viscosity will be reduced after preheating. This is conducive to the uniform distribution of the coating on the transfer roller 71 and the uniform coating on the coating substrate 5. And the heated coating is more likely to penetrate into the surface of the substrate and form a closer bond with the substrate. This can not only improve the adhesion of the coating, but also reduce bubbles and impurities in the coating, thereby improving the coating quality.

[0037] When the coated substrate 5 passes through the comma scrapers 73 on both sides, since the comma scrapers 73 on both sides vibrate at equal frequencies but in opposite directions, the coated substrate 5 will be subjected to forces from opposite directions on both sides when passing through, thereby generating tiny reciprocating vibrations. This reciprocating vibration can make the coating evenly distributed on the surface of the coated substrate 5, especially the accumulated coating below the transfer roller 71 due to the high pressure between the transfer roller 71 and the supporting base 72 will be more easily coated on the coated substrate 5 under the action of vibration.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multiple drying coating machine, comprising a support plate body (1), a substrate roller (2), a composite dryer (4), and a discharge roller (3), wherein the two ends of the support plate body (1) are rotatably connected to the substrate roller (2) and the discharge roller (3), a composite dryer (4) is arranged between the substrate roller (2) and the discharge roller (3), the composite dryer (4) is fixedly mounted on the support plate body (1), the coated substrate (5) on the substrate roller (2) passes through the composite dryer (4) and is wound on the discharge roller (3), a feed tension shaft (6) and a discharge tension shaft (6) are arranged between the substrate roller (2) and the composite dryer (4), and the machine is characterized in that: A coating mechanism (7) is arranged between the feed tension shaft (6) and the discharge tension shaft (6), the coating mechanism (7) comprising a transfer roller (71), a support base (72), and a comma scraper (73), the coating substrate (5) being arranged between the transfer roller (71) and the support base (72), the comma scraper (73) being arranged on one side of the transfer roller (71), the surface of the transfer roller (71) being provided with a coating, the blade head of the comma scraper (73) being attached above the coating substrate (5), and ultrasonic vibration modules being arranged on the upper and lower sides of the comma scraper (73), the comma scraper (73) being provided with a built-in magnetic core, the ultrasonic vibration module changing the electromagnetic field around the comma scraper (73) so that the surface of the comma scraper (73) generates high-frequency vibration.

2. A multiple drying coating machine according to claim 1, characterized in that: The ultrasonic vibration module comprises a base magnet (74) and an adsorption magnet (75); the base magnet (74) is slidably arranged below the support base (72), and two ends of the base magnet (74) are slidably connected to the support plate (1); a cylindrical coating cavity (711) and an annular material discharge cavity (712) are coaxially arranged inside the transfer roller (71); the material discharge cavity (712) is arranged between the transfer roller (71) and the coating cavity (711); the adsorption magnet (75) is arranged in the material discharge cavity (712); the adsorption magnet (75) is rotatably connected to two ends of the coating cavity (711); the magnetic field generated by the adsorption magnet (75) and the base magnet (74) acts on the comma scraper (73); the adsorption magnet (75) and the base magnet (74) are both electromagnets, and when they generate an electromagnetic field, the comma scraper (73) is vibrated.

3. A multiple drying coating machine according to claim 2, characterized in that: When the adsorption magnet (75) and the base magnet (74) generate an electromagnetic field, the comma scraper (73) is heated to generate heat; and by controlling the intensity and angle of the electromagnetic field generated by the adsorption magnet (75) and the base magnet (74) on the comma scraper (73), the distance and angle between the blade head of the comma scraper (73) and the coating substrate (5) are adjusted.

4. A multiple drying coating machine according to claim 2, characterized in that: The transfer roller (71) is rotatably connected to the discharge chamber (712), and a discharge hole (713) is provided at the bottom of the discharge chamber (712), the discharge hole (713) is communicated with the surface of the transfer roller (71), and a connecting hole (714) is provided at the top of the coating chamber (711) and is communicated with the discharge chamber (712).

5. A multiple drying coating machine according to claim 2, characterized in that: Both ends of the comma scraper (73) are rotatably connected to a sliding knife holder (76), the sliding knife holder (76) is slidably mounted on the support plate body (1), and an elastic buffer structure is provided between the comma scraper (73) and the sliding knife holder (76).

6. A multiple drying coating machine according to claim 2, characterized in that: The coating cavity (711) structure is made of ferromagnetic metal, and the adsorption magnet (75) heats the coating cavity (711) when generating an electromagnetic field.

7. A multiple drying coating machine according to claim 1, characterized in that: Both ends of the transfer roller (71) are rotatably connected to the support plate body (1), and the transfer roller (71) is capable of sliding in a vertical direction relative to the support plate body (1).

8. A multiple drying coating machine according to claim 2, characterized in that: The comma scrapers (73) are symmetrically arranged in two groups on both sides of the transfer roller (71), the base magnets (74) are symmetrically arranged in two groups on both sides of the transfer roller (71), and the adsorption magnets (75) are symmetrically arranged in two groups in the discharge chamber (712); the electromagnetic fields generated by the adsorption magnets (75) and the base magnets (74) on both sides have equal periods and opposite current and voltage changes, so that the vibration frequencies generated by the comma scrapers (73) on both sides are equal and the vibration directions are opposite.

9. A multiple drying coating machine according to claim 1, characterized in that: The transfer roller (71) is rotatably connected to the support plate body (1), and the support base (72) is fixedly mounted on the support plate body (1).

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