Coating machine for processing lining paper and coating process

Abstract

The invention relates to the technical field of lined paper processing, in particular to a coating machine for lined paper processing and a coating process, the coating machine comprises a coating machine body and a winding roller fixedly installed at the front end of the coating machine body, and supports which are located in front of the winding roller and are in bilateral symmetry are fixedly installed on the coating machine body. Through the synergistic effect of the V-shaped secondary flow guide plate, the flow guide groove and the negative pressure bin, redundant paint splashed on the edge during coating is actively scraped, collected and recycled, the problems of edge accumulation and wiredrawing are avoided, the uniformity and the overall quality of the coating edge are improved, equipment is prevented from being polluted by splashed paint, the cleaning and maintenance frequency and material waste are reduced, and the production cost is reduced. Meanwhile, the drying plate preheats the wet coating to prepare for subsequent drying, and efficient and high-quality drying is realized through combination of a three-section type graded drying mode and precise temperature control of partitions, so that the drying uniformity and efficiency of the lining paper are improved, heat energy waste is reduced, and the physical performance of the coating is improved.

Description

Technical Field

[0001] This invention relates to the field of inner lining paper processing technology, and in particular to a coating machine and coating process for inner lining paper processing. Background Technology

[0002] Liner paper is a special type of paper used inside product packaging to provide lining, protection, decoration, or barrier functions. Typical types include metallic gold and silver cardstock, beautifully patterned transfer paper, and grey-backed white cardboard as the base material. These papers usually have a smooth surface or a specific coating, so a coating machine is needed to coat the liner paper to evenly, precisely, and efficiently adhere specific functional coatings to the paper surface. This fundamentally enhances the decorative aesthetics, physical strength, chemical stability, and subsequent processing adaptability of the liner paper necessary for the final packaging, meeting the stringent standards of high-end packaging for visual appeal, product protection, and process requirements.

[0003] Currently, coating machines still have the following problems when coating inner lining paper: When coating inner lining paper, the coating liquid is prone to splashing, accumulation and stringing at the paper edges. Traditional doctor blades or baffles only provide simple physical obstruction of the coating liquid and cannot effectively recover the coating, resulting in waste of coating liquid and frequent machine shutdowns for cleaning. At the same time, the subsequent drying often uses a single hot air or overall heating method, which results in high energy consumption and uneven drying. It also causes the coating surface to dry too quickly while internal solvent residue remains, affecting the final smoothness and lamination effect. Summary of the Invention

[0004] In view of the problems that the coating liquid in the above-mentioned or existing technologies still tends to splash, accumulate and string at the edges of the paper when coating the inner lining paper, the present invention is proposed.

[0005] To solve the above-mentioned technical problems, the present invention provides a coating machine and coating process for processing inner lining paper, which is achieved by the following specific technical means: A coating machine for processing inner lining paper includes a coating machine body and a take-up roller fixedly installed at its front end. A bracket located in front of the take-up roller and symmetrically arranged on the left and right sides is fixedly installed on the coating machine body. A guide plate is set between the left and right symmetrical supports. Several guide grooves are opened on the guide plate in a linear array. A negative pressure chamber connected to the guide groove is fixedly installed on the guide plate. A secondary guide plate in a V shape is fixedly installed on the front side of the guide plate. A drying plate is fixedly installed on the secondary guide plate. After the inner liner paper is coated, it reaches the guide plate. The guide plate scrapes off the paint splashed at the edge. Excess paint enters the guide channel and is sucked into the negative pressure chamber. The secondary guide plate assists the guide channel in scraping off the paint, and the drying plate preheats the inner liner paper for subsequent drying treatment. A drying mechanism is located behind the deflector plate. The drying mechanism includes a curing component that uses a combination of infrared shortwave and high-speed hot air to quickly cure the inner liner paper, a permeation component that uses mid- and far-infrared radiation and thermal circulation to homogenize and permeate the inner liner paper, and a shaping component that uses an array of cold air knives to cool and shape the inner liner paper. The inner liner paper passes through the curing component, the permeation component, and the shaping component in sequence.

[0006] Preferably, the lower end face of the secondary guide plate is provided with a plurality of secondary guide grooves in a linear array, and a connecting pipe communicating with the plurality of secondary guide grooves is fixedly installed on the secondary guide plate.

[0007] Preferably, the guide plate is provided with an angle adjustment component for adjusting the angle of its contact with the inner liner paper. The angle adjustment component includes a central shaft fixedly installed at the front end of the guide plate, and a motor is fixedly installed on the bracket through a motor frame. The output end of the motor is fixedly connected to the central shaft.

[0008] Preferably, the guide plate is further provided with a collection component for collecting excess paint on both sides of the guide plate. The collection component includes L-shaped collection plates symmetrically fixedly installed on the left and right sides of the guide plate. The horizontal section of the L-shaped collection plate has several recycling tanks in a linear array.

[0009] Preferably, both the connecting pipe and the recovery tank are connected to the negative pressure chamber, and the cross-section of the secondary guide channel is inverted Ω-shaped.

[0010] Preferably, the curing component includes a first side plate disposed in front of the guide plate and symmetrically arranged on the left and right. Several inclined near-infrared short-wave radiation plates are fixedly installed between the two symmetrical first side plates in a linear array. Several hot air nozzles are fixedly installed at the upper end of each near-infrared short-wave radiation plate in a linear array. Two positioning rollers distributed in front and behind and located below the near-infrared short-wave radiation plates are rotatably installed between the two symmetrical first side plates.

[0011] Preferably, the permeation assembly includes a heat circulation chamber fixedly installed in front of the first side plate by a support frame, an air pump fixedly installed on the heat circulation chamber, and a mid- and far-infrared radiation plate fixedly installed on the inner side plate of the heat circulation chamber.

[0012] Preferably, the shaping component includes a second side plate that is disposed in front of the hot circulation chamber and is symmetrical on both sides. Several limiting components are fixedly installed between the two symmetrical second side plates in a linear array. Each limiting component consists of two limiting blades that are symmetrical on top and bottom and distributed in a figure-eight shape. Several air ducts are fixedly installed on the limiting blades in a linear array. Rollers are rotatably installed on the side of the two corresponding limiting blades that are close to each other.

[0013] Preferably, the thermal circulation chamber is fixedly connected to the first side plate which is symmetrical on both sides, and the thermal circulation chamber is fixedly connected to the second side plate which is symmetrical on both sides.

[0014] Preferably, the present invention also provides a process for coating using the above-mentioned coating machine for inner liner paper processing, the specific process including the following steps: S1: Substrate treatment: The inner liner paper substrate is installed on the unwinding mechanism of the coating machine body, and the inner liner paper is guided by the tension control system to make it pass smoothly through the coating unit.

[0015] S2: Coating operation: At the coating unit of the coating machine, a specific coating is evenly applied to the surface of the substrate according to the process requirements to form a wet coating of a set thickness.

[0016] S3: Edge treatment: The coated inner liner paper immediately enters the position of the guide plate and the secondary guide plate, which scrape off and collect the coating at the edge of the inner liner paper.

[0017] S4: Preheating operation: While scraping, the baking plate preheats the coating to raise the overall temperature of the coating without completely curing it.

[0018] S5: Graded drying and shaping operation: The preheated inner lining paper is fed into the drying mechanism, so that the inner lining paper passes through the curing component, the penetration component and the shaping component in sequence.

[0019] S6: Winding and Post-processing: The cooled and shaped inner liner paper is neatly wound up by the winding roller under constant tension control to form a finished roll, which can then be slit, die-cut or laminated.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: through the synergistic effect of the V-shaped secondary guide plate, the guide channel and the negative pressure chamber, excess paint splashed at the edges during coating is actively scraped off, collected and recycled, avoiding edge accumulation and stringing problems. This not only improves the neatness of the coating edges and the overall quality, but also avoids paint splashing and contamination of the equipment, reducing the frequency of cleaning and maintenance and material waste. At the same time, the drying plate preheats the wet coating to prepare for subsequent drying. Furthermore, through the combination of three-stage graded drying methods and precise temperature control in different zones, efficient and high-quality drying is achieved, thereby improving the uniformity and efficiency of inner lining paper drying, reducing heat energy waste and improving the physical properties of the coating. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a frontal three-dimensional structural diagram of the coating machine body of the present invention.

[0023] Figure 2 This is a rear-view three-dimensional structural diagram of the coating machine body of the present invention.

[0024] Figure 3 This is a three-dimensional structural diagram of the guide plate and drying mechanism of the present invention.

[0025] Figure 4 This is a three-dimensional structural diagram of the guide vane and secondary guide vane of the present invention when they are combined.

[0026] Figure 5 This is a cross-sectional three-dimensional structural diagram of the guide plate and the secondary guide plate of the present invention.

[0027] Figure 6 This is a three-dimensional structural diagram of the curing component of the present invention.

[0028] Figure 7 This is a partial cross-sectional three-dimensional structural diagram of the near-infrared shortwave radiation plate and hot air nozzle of the present invention.

[0029] Figure 8 This is a partial cross-sectional three-dimensional structural diagram of the permeation component of the present invention.

[0030] Figure 9 This is a cross-sectional structural diagram of the shaping component of the present invention.

[0031] In the diagram: 1. Coating machine body; 2. Take-up roller; 3. Support frame; 4. Guide plate; 41. Guide channel; 42. Negative pressure chamber; 43. Secondary guide plate; 431. Secondary guide channel; 432. Connecting pipe; 44. Drying plate; 45. Angle adjustment assembly; 451. Central shaft; 452. Motor; 46. Collection assembly; 461. L-shaped collection plate; 462. Recycling tank; 5. Drying mechanism; 51. Curing assembly; 511. First side plate; 512. Near-infrared short-wave radiation plate; 513. Hot air nozzle; 514. Positioning roller; 52. Penetration assembly; 521. Hot circulation chamber; 522. Air pump; 523. Mid- and far-infrared radiation plate; 53. Shaping assembly; 531. Second side plate; 532. Limiting knife; 533. Air duct; 534. Roller. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0034] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A coating machine for processing inner lining paper includes a coating machine body 1 and a take-up roller 2 fixedly installed at its front end. A bracket 3 located in front of the take-up roller 2 and symmetrically arranged on the left and right sides is fixedly installed on the coating machine body 1.

[0035] A guide plate 4 is provided between the left and right symmetrical brackets 3. Several guide grooves 41 are opened on the guide plate 4 in a linear array. A negative pressure chamber 42 communicating with the guide grooves 41 is fixedly installed on the guide plate 4. A secondary guide plate 43 in a V shape is fixedly installed on the front side of the guide plate 4. A drying plate 44 is fixedly installed on the secondary guide plate 43.

[0036] After the inner lining paper is coated, it reaches the guide plate 4. The guide plate 4 scrapes off the paint splashed at the edge. The excess paint enters the guide channel 41 and is sucked into the negative pressure chamber 42. The secondary guide plate 43 assists the guide channel 41 in scraping off the paint, and the drying plate 44 preheats the inner lining paper for subsequent drying treatment.

[0037] Please see Figure 2 and Figure 3 A drying mechanism 5 is provided behind the guide plate 4. The drying mechanism 5 includes a curing component 51 that uses a combination of infrared short wave and high-speed hot air to quickly cure the inner liner paper, a permeation component 52 that uses mid- and far-infrared light and thermal circulation to homogenize and permeate the inner liner paper, and a shaping component 53 that uses an array of cold air knives to cool and shape the inner liner paper. The inner liner paper passes through the curing component 51, the permeation component 52 and the shaping component 53 in sequence.

[0038] Among them, the coating machine body 1 serves as a component that supports and accommodates all the functions of the coating machine, and the winding roller 2 winds the coated inner liner paper into a roll.

[0039] In actual operation, after the inner liner paper is coated in the coating unit of the coating machine body 1, it is immediately guided to the position of the guide plate 4 and the secondary guide plate 43. The guide plate 4 scrapes off the paint splashed on the edge of the inner liner paper. Excess paint enters the guide channel 41 under the squeezing action and the suction of the negative pressure chamber 42 and is sucked into the negative pressure chamber 42. The secondary guide plate 43 assists the guide channel 41 in further scraping off the paint to ensure the cleanliness of the edge area. At the same time, the drying plate 44 preheats the inner liner paper to increase the coating temperature and create favorable conditions for subsequent drying.

[0040] The curing component 51 penetrates the coating surface with infrared short-wave radiation, and combined with high-speed hot air, it quickly removes the solvent, achieving rapid surface drying and initial curing of the coating. The penetration component 52 uses mid- and far-infrared radiation combined with uniformly circulating hot air to make the solvent inside the coating slowly and evenly evaporate, avoiding surface skinning. The shaping component 53 cools the inner lining paper quickly and evenly, thereby ensuring the stability of the coating structure and preventing re-adhesion and deformation.

[0041] The inner liner paper passes through the curing component 51, the penetration component 52 and the shaping component 53 in sequence. Driven by the winding roller 2, the inner liner paper passes through the above three components in sequence according to the preset speed and path, completing the whole process from surface curing, internal penetration and drying to final cooling and shaping.

[0042] By utilizing the synergistic effect of the guide plate 4, guide channel 41, negative pressure chamber 42, and secondary guide plate 43, the problems of edge coating splashing, accumulation, and stringing during the coating process of inner liner paper are solved, and excess coating is recovered, reducing coating waste and the frequency of downtime for cleaning. At the same time, the preheating function of the drying plate 44 and the graded treatment of the curing component 51, penetration component 52, and shaping component 53 in the drying mechanism 5 overcome the defects of high energy consumption and insufficient drying uniformity of a single drying method, ensuring uniform drying of the coating and final flatness shaping, thereby improving the quality of inner liner paper coating and its adaptability to subsequent processing.

[0043] Please see Figure 5 The lower end face of the secondary guide plate 43 is provided with a number of secondary guide grooves 431 in a linear array, and a connecting pipe 432 communicating with the number of secondary guide grooves 431 is fixedly installed on the secondary guide plate 43.

[0044] Please see Figure 3 and Figure 4 The guide plate 4 is also provided with a collection component 46 for collecting excess paint on both sides of the guide plate 4. The collection component 46 includes L-shaped collection plates 461 that are symmetrically fixed on the left and right sides of the guide plate 4. The horizontal section of the L-shaped collection plate 461 is provided with several recycling tanks 462 in a linear array.

[0045] Please see Figure 4 and Figure 5 Both the connecting pipe 432 and the recovery tank 462 are connected to the negative pressure chamber 42, and the cross-section of the secondary guide channel 431 is an inverted Ω shape.

[0046] In actual operation, the secondary guide channel 431 enables the secondary guide plate 43 to more comprehensively assist in scraping the coating from the edge of the inner liner paper, avoiding coating splashing and residue. At the same time, the connecting pipe 432 ensures that the collected coating can be promptly transported to the negative pressure chamber 42 for recycling, thereby significantly enhancing the coating collection capacity of the secondary guide plate 43.

[0047] After the inner liner paper is coated, when the inner liner paper is scraped by the guide plate 4, excess coating will overflow from both sides of the guide plate 4. The symmetrical L-shaped collection plate 461 can catch the overflowing coating, thereby limiting the overflowing coating to a preset collection area. At the same time, the excess coating is guided into the recycling system through the recycling tank 462, and works in conjunction with the scraping function of the guide plate 4 to ensure the cleanliness of the inner liner paper coating edge and the uniformity of the coating.

[0048] The inverted Ω-shaped cross-section of the secondary guide channel 431 can form a stable liquid flow channel, reduce the adhesion of coating on the inner wall of the channel, and reduce the possibility of coating splashing out of the channel during high-speed operation. This improves the guiding and discharge speed of the coating, thereby improving the coating recycling efficiency, minimizing coating waste, and significantly reducing the frequency and difficulty of equipment cleaning, thus improving the continuity and production efficiency of coating operations.

[0049] Please see Figure 3 and Figure 4 The guide plate 4 is provided with an angle adjustment component 45 for adjusting the angle of its contact with the inner liner paper. The angle adjustment component 45 includes a central shaft 451 fixedly installed at the front end of the guide plate 4, and a motor 452 fixedly installed on the bracket 3 through a motor frame. The output end of the motor 452 is fixedly connected to the central shaft 451.

[0050] In actual operation, the motor 452 drives the central shaft 451, so that the guide plate 4 can adjust the contact angle between the guide plate 4 and the inner lining paper in real time or in a preset manner according to process parameters such as the thickness of the inner lining paper, the coating speed or the paper characteristics, so as to ensure that the guide plate 4 always contacts the inner lining paper at the best angle, thereby achieving efficient and uniform scraping and recycling of the paint splashed on the edge.

[0051] The angle adjustment component 45, together with other components such as the guide plate 4, the secondary guide plate 43, and the negative pressure chamber 42, forms a complete coating scraping and recycling structure, which greatly improves the adaptability and reliability of the inner lining paper coating process.

[0052] Please see Figure 2 , Figure 3 , Figure 6 and Figure 7 The curing component 51 includes a first side plate 511 that is symmetrically arranged in front of the guide plate 4. Several inclined near-infrared short-wave radiation plates 512 are fixedly installed between the two symmetrical first side plates 511 in a linear array. Several hot air nozzles 513 are fixedly installed on the upper end of each near-infrared short-wave radiation plate 512 in a linear array. Two positioning rollers 514 that are distributed front to back and located below the near-infrared short-wave radiation plates 512 are rotatably installed between the two symmetrical first side plates 511.

[0053] In actual operation, the near-infrared short-wave radiation plate 512 heats the coating of the inner lining paper by emitting near-infrared short-wave radiation. Near-infrared short-wave radiation has the characteristics of strong penetration, fast heating speed and high energy efficiency. It can directly act on the inside of the coating to achieve a heating effect from the inside out. The linear array arrangement ensures uniform coverage of the entire width of the inner lining paper. At the same time, the near-infrared short-wave radiation plate 512 is placed at an angle, which helps to optimize the distribution of radiation energy and avoid local overheating or uneven heating.

[0054] The hot air nozzle 513 heats the coating of the inner lining paper by spraying high-speed hot air. The hot air nozzle 513, in conjunction with the near-infrared short-wave radiation plate 512, can assist infrared radiation heating, accelerate solvent evaporation, and also use high-speed hot air to remove moisture from the surface of the coating, preventing premature skin formation and thus avoiding internal solvent residue.

[0055] When the inner liner paper enters the curing assembly 51, the short-wave infrared rays emitted by the near-infrared short-wave radiation plate 512 quickly penetrate the coating and directly heat the solvent and resin inside the coating, achieving rapid temperature rise. At the same time, the high-speed hot air ejected from the hot air nozzle 513 acts on the surface of the coating, accelerating the evaporation of the surface solvent and preventing the surface of the coating from drying and forming a skin too early, thereby avoiding the problem of internal solvent residue and improving the curing efficiency of the coating.

[0056] Please see Figure 2 , Figure 3 and Figure 8 The permeation component 52 includes a heat circulation chamber 521 fixedly installed in front of the first side plate 511 by a support frame. An air pump 522 is fixedly installed on the heat circulation chamber 521, and a mid- and far-infrared radiation plate 523 is fixedly installed on the inner side plate of the heat circulation chamber 521.

[0057] In actual operation, the heat circulation chamber 521 serves as a closed heating environment, reducing heat loss to the external environment. The air pump 522 provides air circulation for the heat circulation chamber 521, improving the uniformity of heat distribution within the chamber and increasing the efficiency of heat energy utilization. At the same time, the mid- and far-infrared radiation plate 523 can emit penetrating mid- and far-infrared rays to directly heat the inner lining paper coating. Combined with the uniform hot air in the heat circulation chamber 521, the coating is homogenized and penetrated from the inside out, thereby ensuring the uniform evaporation of the solvent inside the coating and improving the smoothness and composite effect of the coating.

[0058] Please see Figure 2 , Figure 3 and Figure 9The shaping component 53 includes a second side plate 531 that is disposed in front of the hot circulation chamber 521 and is symmetrical on both sides. Several limiting components are fixedly installed between the symmetrical second side plates 531 in a linear array. The limiting components consist of two limiting blades 532 that are symmetrical on top and bottom and distributed in a figure-eight shape. Several air ducts 533 are fixedly installed on the limiting blades 532 in a linear array. Rollers 534 are rotatably installed on the side of the two corresponding limiting blades 532 that are close to each other.

[0059] Please see Figure 3 The heat circulation chamber 521 is fixedly connected to the first side plate 511 which is symmetrical on the left and right, and the heat circulation chamber 521 is fixedly connected to the second side plate 531 which is symmetrical on the left and right.

[0060] In actual operation, the several air ducts 533 on the limiting knife 532 can spray the cooling airflow evenly and accurately onto the inner lining paper, avoiding local overcooling or insufficient cooling, and ensuring that the coating is cured and shaped in a uniform temperature field.

[0061] Two symmetrical, figure-eight-shaped limiting blades 532 arranged in a linear array can accurately position and guide the inner liner paper entering the shaping component 53, preventing the paper from shifting or shaking laterally during high-speed operation, ensuring the uniformity of the cooling process, and rapidly cooling the dried coating to stabilize the coating microstructure, eliminate residual heat, and prevent adhesion or deformation due to excessive temperature during winding.

[0062] The roller 534 reduces the friction between the inner liner paper and the limiting knife 532, allowing the inner liner paper to pass smoothly and without damage through the cooling area. This avoids problems such as coating scratches, uneven surfaces, or paper deformation caused by friction or stretching, thereby achieving fine cooling and shaping of the inner liner paper coating, improving the smoothness, uniformity, and dimensional stability of the final product, and meeting the stringent quality requirements of high-end packaging.

[0063] Please see Figure 1-9 The present invention also provides a process for coating using the above-mentioned coating machine for inner liner paper processing, the specific process including the following steps: S1: Substrate treatment: The inner liner paper substrate is installed on the unwinding mechanism of the coating machine body 1, and the inner liner paper is guided by the tension control system to make it pass smoothly through the coating unit.

[0064] S2: Coating operation: At the coating unit of the coating machine body 1, a specific coating is uniformly applied to the surface of the substrate according to the process requirements to form a wet coating of a set thickness.

[0065] S3: Edge treatment: The micro air gap at the leading edge of the guide plate 4 physically scrapes off the edges of both sides of the paper, and guides the splashed and accumulated excess paint into the guide channel 41 of the linear array. At the same time, the negative pressure chamber 42 is activated, and the liquid paint in the guide channel 41 is continuously sucked in and transported to the waste collection tank through negative pressure, so as to realize the immediate removal and recycling of paint.

[0066] S4: Preheating operation: During the scraping operation, the paper passes through the secondary guide plate 43, and its surface is irradiated by the baking plate 44 on the plate at close range, which initially heats up the coating to raise the overall temperature of the coating without completely curing it.

[0067] S5: Grading, Drying, and Shaping Operation: After edge treatment and preheating, the inner lining paper enters the drying unit 5 and undergoes three stages in sequence: The paper first passes through the curing component 51, where a high-power-density near-infrared short-wave radiation plate 512 penetrates and heats the coating. At the same time, the high-speed hot air from the hot air nozzle 513 blows and sweeps the coating surface, thereby causing the coating surface to initially gel or solidify in a very short time, locking in its shape and preventing it from flowing.

[0068] The paper then enters the permeation assembly 52, where it is uniformly and gently heated by the mid- and far-infrared radiation plate 523. In conjunction with the temperature-controlled heat circulation chamber 521, hot air flows smoothly over the coating surface, promoting the full and uniform evaporation of the solvent inside the coating.

[0069] Finally, the paper passes through the shaping component 53. In this stage, two limiting blades 532, which are symmetrically arranged in a figure-eight pattern, rapidly cool the dried coating to stabilize the microstructure of the coating, eliminate residual heat, and prevent sticking or deformation due to excessive temperature during winding.

[0070] S6: Winding and Post-processing: The cooled and shaped inner liner paper is neatly wound up by the winding roller 2 under constant tension control to form a finished roll, which can then be slit, die-cut or laminated.

[0071] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coating machine for processing inner lining paper, comprising a coating machine body (1) and a take-up roller (2) fixedly installed at its front end, characterized in that: The coating machine body (1) is fixedly installed with a bracket (3) located in front of the take-up roller (2) and symmetrical on the left and right; A guide plate (4) is provided between the left and right symmetrical brackets (3). Several guide grooves (41) are opened on the guide plate (4) in a linear array. A negative pressure chamber (42) communicating with the guide grooves (41) is fixedly installed on the guide plate (4). A secondary guide plate (43) in a V shape is fixedly installed on the front side of the guide plate (4). A drying plate (44) is fixedly installed on the secondary guide plate (43). After the inner lining paper is coated, it reaches the guide plate (4). The guide plate (4) scrapes off the paint splashed on the edge. The excess paint enters the guide channel (41) and is sucked into the negative pressure chamber (42). The secondary guide plate (43) assists the guide channel (41) in scraping off the paint, and the drying plate (44) preheats the inner lining paper for subsequent drying treatment. A drying mechanism (5) is provided behind the guide plate (4). The drying mechanism (5) includes a curing component (51) that uses a combination of infrared short wave and high-speed hot air to quickly cure the inner liner paper, a permeation component (52) that uses mid- and far-infrared light and thermal circulation to homogenize and permeate the inner liner paper, and a shaping component (53) that uses an array of cold air knives to cool and shape the inner liner paper. The inner liner paper passes through the curing component (51), the permeation component (52), and the shaping component (53) in sequence.

2. The coating machine for processing inner lining paper as described in claim 1, characterized in that: The lower end face of the secondary guide plate (43) is provided with a plurality of secondary guide grooves (431) in a linear array, and a connecting pipe (432) communicating with the plurality of secondary guide grooves (431) is fixedly installed on the secondary guide plate (43).

3. The coating machine for processing inner lining paper as described in claim 1, characterized in that: The guide plate (4) is provided with an angle adjustment component (45) for adjusting the angle of its contact with the inner liner paper. The angle adjustment component (45) includes a central shaft (451) fixedly installed at the front end of the guide plate (4). A motor (452) is fixedly installed on the bracket (3) through a motor frame. The output end of the motor (452) is fixedly connected to the central shaft (451).

4. The coating machine for processing inner lining paper as described in claim 2, characterized in that: The guide plate (4) is also provided with a collection assembly (46) for collecting excess paint on both sides of the guide plate (4). The collection assembly (46) includes L-shaped collection plates (461) symmetrically fixed on the left and right sides of the guide plate (4). The horizontal section of the L-shaped collection plate (461) is provided with several recycling tanks (462) in a linear array.

5. The coating machine for processing inner lining paper as described in claim 4, characterized in that: The connecting pipe (432) and the recovery tank (462) are both connected to the negative pressure chamber (42), and the cross-section of the secondary guide channel (431) is inverted Ω shape.

6. The coating machine for processing inner lining paper as described in claim 1, characterized in that: The curing component (51) includes a first side plate (511) arranged in front of the guide plate (4) and symmetrically positioned on the left and right. Several near-infrared short-wave radiation plates (512) are fixedly installed between the two symmetrical first side plates (511) in a linear array. Several hot air nozzles (513) are fixedly installed on the upper end of each near-infrared short-wave radiation plate (512) in a linear array. Two positioning rollers (514) are rotatably installed between the two symmetrical first side plates (511) and are distributed in front and behind and located below the near-infrared short-wave radiation plates (512).

7. The coating machine for processing inner lining paper as described in claim 6, characterized in that: The permeation assembly (52) includes a heat circulation chamber (521) fixedly installed in front of the first side plate (511) by a support frame. An air pump (522) is fixedly installed on the heat circulation chamber (521), and a mid- and far-infrared radiation plate (523) is fixedly installed on the inner side plate of the heat circulation chamber (521).

8. The coating machine for processing inner lining paper as described in claim 7, characterized in that: The shaping component (53) includes a second side plate (531) that is arranged in front of the hot circulation chamber (521) and is symmetrical on the left and right. Several limiting components are fixedly installed between the symmetrical second side plates (531) in a linear array. The limiting components consist of two limiting blades (532) that are symmetrical on the top and bottom and distributed in a figure-eight shape. Several air ducts (533) are fixedly installed on the limiting blades (532) in a linear array. Rollers (534) are rotatably installed on the side of the two corresponding limiting blades (532) that are close to each other.

9. The coating machine for processing inner lining paper as described in claim 7 or 8, characterized in that: The heat circulation chamber (521) is fixedly connected to the first side plate (511) which is symmetrical on both sides, and the heat circulation chamber (521) is fixedly connected to the second side plate (531) which is symmetrical on both sides.

10. The coating machine for processing inner lining paper as described in claim 9, characterized in that: This invention also provides a process for coating using the aforementioned coating machine for inner liner paper processing, the specific processing steps being as follows: Includes the following steps: S1: Substrate treatment: The inner liner paper substrate is installed on the unwinding mechanism of the coating machine body (1), and the inner liner paper is guided by the tension control system to make it pass through the coating unit smoothly. S2: Coating operation: At the coating unit of the coating machine body (1), a specific coating is uniformly applied to the surface of the substrate according to the process requirements to form a wet coating of a set thickness. S3: Edge treatment: The coated inner liner paper immediately enters the position of the guide plate (4) and the secondary guide plate (43), which scrape off and collect the coating on the edge of the inner liner paper. S4: Preheating operation: While scraping, the baking plate (44) preheats the coating to raise the overall temperature of the coating without completely curing it; S5: Graded drying and shaping operation: The preheated inner lining paper is passed into the drying mechanism (5), so that the inner lining paper passes through the curing component (51), the penetration component (52) and the shaping component (53) in sequence; S6: Rewinding and post-processing: The inner lining paper, after cooling and shaping, is neatly rewound by the rewinding roller (2) under constant tension control to form a finished roll, which can then be slit, die-cut or composite processed.

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