A coater, coating system

Abstract

The present application relates to the technical field of mechanical processing, in particular to a coating machine, comprising: a pre-folding unit, the pre-folding unit comprising a folding assembly and a folding roller shaft, and a folding transmission roller shaft, the folding assembly comprising a folding plate and a folding platform, the folding plate and the folding platform being arranged at an angle, the upper paper base film passes through the folding assembly and then through the gap between the folding roller shaft and the folding transmission roller shaft to complete upward folding; a main conveying belt, four side conveying assemblies are arranged on the main conveying belt, the side conveying assemblies are enclosed to form a limiting channel, and an anti-adhesion coating is sprayed at the joint of the side conveying assemblies; a lower paper base film, the lower paper base film is arranged on the main conveying belt, and a foam material is arranged on the lower paper base film, and the lower paper base film and the folded upper paper base film enter the limiting channel together for limiting foaming. The coating machine has a simple structure, is easy to operate, greatly reduces the production difficulty and cost, improves the use efficiency and coating quality, and can be widely applied to various production fields requiring limiting foaming of the coating machine.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to a coating machine and a coating system. Background Technology

[0002] Coating machines are mainly used for surface coating processes on films, paper, etc. They coat rolls of substrate with a layer of specific functional adhesives, coatings, foams, or inks, then dry and cut into sheets or rewind. However, existing coating machines have relatively rough film coating processes, resulting in uneven coating on the film surface. This leads to uneven film thickness and lower product quality.

[0003] Dongguan Fuyin Adhesive Technology Co., Ltd. has published a patent for a precision coating machine (CN214440418U), which, through optimization of the mechanical structure of the lifting mechanism, can accurately control the thickness of the adhesive layer, thereby improving production quality. Shenzhen Yuehongyuan Technology Co., Ltd. has proposed a coating machine with a limiting function (CN218475501U), which can adjust the distance between the coating roller and the pressure roller to meet the coating thickness required for film production, prevent rigid collisions between the coating roller and the pressure roller, protect them from damage, extend their service life, and ensure uniform coating thickness on the film. Furthermore, Foshan Forsman Medical Technology Co., Ltd. has disclosed a coating machine (CN213133848U) for uniform coating. This equipment, by installing a sponge block, allows the sponge block to fully absorb the material inside the material box. Simultaneously, the upper end of the coating roller extends into the interior of the sponge block, preventing direct contact between the coating roller and the material, thus avoiding excessive material distribution at the outer end of the coating roller and dripping onto the object to be coated. This significantly improves the coating uniformity of the machine. By installing an adapter motor, the drying roller can rotate synchronously with the coating machine, preventing friction between incompletely dried material and the drying roller, which could cause unstable coating. However, while these coating machines can achieve uniform coating of materials such as adhesives, they cannot achieve sponge foam production at a specific height.

[0004] In the field of foaming coating machines, the foaming height of finished sponge materials can only be controlled by adjusting the amount of raw materials added or changing the formula. However, adjusting the amount of raw materials added cannot meet the specific requirements for foaming density and cell size of sponges, while changing the formula requires investment in research and development time and economic costs. Currently, no coating machine can solve the existing problem of limited foaming of sponges by simply focusing on the structure of the coating machine. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the foaming height of the finished sponge material in the existing coating machine can only be controlled by adjusting the amount of raw materials added or changing the formula, and adjusting the amount of raw materials added cannot meet the requirements of specific sponge foaming density and cell size. Thus, a coating machine and coating system are provided.

[0006] To solve the above-mentioned technical problems, the present invention provides a coating machine, comprising: a pre-folding unit, the pre-folding unit including a folding component, a folding roller, and a folding transmission roller, the folding component including a folding plate and a folding platform, the folding plate and the folding platform being set at an angle, the upper paper base film passing through the folding component and then through the gap between the folding roller and the folding transmission roller to complete the upward folding; a main conveyor belt, the main conveyor belt having four side conveying components, the four side conveying components forming a limiting channel, and an anti-adhesion coating being sprayed at the splicing points of the side conveying components; and a lower paper base film, the lower paper base film being disposed on the main conveyor belt, and having foam material disposed on the lower paper base film, the lower paper base film and the folded upper paper base film entering the limiting channel together for limiting foaming.

[0007] Furthermore, the folding plate includes a first set of folding plates and a second set of folding plates, which are disposed on both sides of the folding platform.

[0008] Furthermore, the first set of folding plates includes three first folding plates, and the angles between the three first folding plates and the folding platform are 91°~180°, 91°~179°, and 90°, respectively.

[0009] Furthermore, the second set of folding plates includes three second folding plates, and the angles between the three second folding plates and the folding platform are 91°~180°, 91°~179°, and 90°, respectively.

[0010] Furthermore, the side conveying assembly includes a servo motor, four side conveyor belts, and four side conveyor belt support steel plates. The servo motor drives the side conveyor belts to rotate, and the four side conveyor belts and the four side conveyor belt support steel plates form the limiting channel.

[0011] Furthermore, the height of the limiting channel is less than or equal to 20mm.

[0012] Furthermore, it also includes an upper correction unit and a lower correction unit, wherein the upper paper base film is wound on the upper correction unit and the lower paper base film is wound on the lower correction unit.

[0013] Furthermore, it also includes a coating head, which is disposed on the main conveyor belt and the lower paper base film.

[0014] The present invention also provides a coating system, including the aforementioned coating machine.

[0015] Furthermore, it also includes a casting head, which is located above the main conveyor belt and is used to cast foaming material onto the lower paper base film.

[0016] The technical solution of this invention has the following advantages:

[0017] 1. The coating machine provided by the present invention includes: a pre-folding unit, the pre-folding unit including a folding component and a folding roller shaft, and a folding transmission roller shaft, the folding component including a folding plate and a folding platform, the folding plate and the folding platform being set at an angle, the upper paper base film passing through the folding component and then through the gap between the folding roller shaft and the folding transmission roller shaft to complete the upward folding; a main conveyor belt, the main conveyor belt being provided with four side conveying components, the four side conveying components forming a limiting channel, and an anti-adhesion coating being sprayed at the splicing points of the side conveying components; a lower paper base film, the lower paper base film being disposed on the main conveyor belt, and foam material being disposed on the lower paper base film, the lower paper base film and the folded upper paper base film entering the limiting channel together for limiting foaming.

[0018] By using pre-folding units, and with the folding plates and folding platforms angled, the two sides of the upper paper-based film or other film passing through the pre-folding units can be bent upwards by 90°, while the folded length of the sides matches the interval width of the side conveyor belts, i.e., the limiting height is consistent. The purpose of the pre-folding units is to ensure that the channel formed by the folded upper paper-based film or other film and the lower paper-based film or other film fits snugly against the limiting channel enclosed by the four side conveyor components. Furthermore, an anti-adhesion coating is sprayed at the seams of the four side conveyor components to prevent the foamed material from contacting the side conveyor belts and sticking together. This ensures the structural stability of the coated material during the limiting foaming process, achieving the goal of continuous limiting foaming production.

[0019] This coating machine can precisely control the thickness of sponge foam by using only a limiting channel, provided the formula and amount of coating raw materials are fixed. Furthermore, the machine has a simple structure and is easy to operate, greatly reducing production difficulty and costs while improving efficiency and coating quality. It can be widely used in various production fields requiring foaming with limiting capabilities.

[0020] This invention uses PLC control to keep the foamed material relatively stationary relative to the limiting surface within the limiting channel, ensuring its structural stability during the limiting foaming and molding process. Compared to existing technologies, this coating machine can complete the limiting foaming and molding of foamed materials, including precise control of foaming height and width, without damaging the appearance, structure, or performance; and improves efficiency.

[0021] 2. The coating machine provided by the present invention includes a side conveying assembly comprising a servo motor, four side conveyor belts, and four side conveyor belt support steel plates. The servo motor drives the side conveyor belts to rotate, and the four side conveyor belts and the four side conveyor belt support steel plates form the limiting channel. By using the servo motor, the side conveyor belts can be driven to rotate, thereby transporting the upper and lower paper base films. The side conveyor belt support steel plates limit and fix the foaming material, ensuring its structural stability during the limiting foaming process, shaping it into a specified form, and increasing the overall strength of the limiting channel.

[0022] 3. The coating machine provided by this invention further includes an upper correction unit and a lower correction unit. The upper paper base film is wound around the upper correction unit, and the lower paper base film is wound around the lower correction unit. The upper and lower correction units allow for the adjustment of the upper and lower paper base films, ensuring stable transport of both films. After the upper paper base film or other film enters the pre-folding unit through the upper correction unit, it undergoes a 90° upward fold on both sides. The lower paper base film or other film then passes through the lower correction unit and the lower drive roller to align with the folded upper paper base film or other film. It then enters a cubic limiting channel formed by four side conveying components for limiting foaming.

[0023] The summary section is provided to present the chosen concepts in a simplified form, which will be further described in the detailed description below. The summary section is not intended to identify essential or necessary features of this disclosure, nor is it intended to limit the scope of this disclosure. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the coating machine provided by the present invention;

[0026] Figure 2 This is a schematic diagram of the side conveying assembly of the coating machine provided by the present invention;

[0027] Figure 3 A schematic diagram of the structure of the three first folded plates of the coating machine provided by the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the three second folded plates of the coating machine provided by the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Folding roller; 2. Folding drive roller; 3. Upper paper base film; 4. Main conveyor belt; 5. Limiting channel; 6. Lower paper base film; 7. First folding plate; 8. Folding platform; 9. Second folding plate; 10. Upper conveyor belt; 11. Left conveyor belt; 12. Lower conveyor belt; 13. Right conveyor belt; 14. Servo motor; 15. Side conveyor belt support steel plate; 16. Upper correction unit; 17. Lower correction unit; 18. Coating head; 19. Casting head; 20. Lower drive roller. Detailed Implementation

[0031] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this disclosure. Therefore, the drawings and description are to be considered exemplary in nature and not restrictive.

[0032] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or connections that allow for communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0034] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The following disclosure provides numerous different embodiments or examples for implementing various structures of this disclosure. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this disclosure. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this disclosure, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0036] The preferred embodiments of this disclosure are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0037] Please see Figures 1 to 4 As shown, the present invention provides a coating machine, comprising: a pre-folding unit, the pre-folding unit including a folding assembly, a folding roller 1, and a folding transmission roller 2, the folding assembly including a folding plate and a folding platform 8, the folding plate and the folding platform 8 being set at an angle, the upper paper base film 3 passing through the folding assembly and then through the gap between the folding roller 1 and the folding transmission roller 2 to complete the upward folding; a main conveyor belt 4, the main conveyor belt 4 being provided with four side conveying assemblies, the four side conveying assemblies forming a limiting channel 5, and an anti-adhesion coating being sprayed at the splicing points of the side conveying assemblies; and a lower paper base film 6, the lower paper base film 6 being disposed on the main conveyor belt 4, and foam material being disposed on the lower paper base film 6, the lower paper base film 6 and the folded upper paper base film 3 entering the limiting channel 5 together for limiting foaming.

[0038] By setting up pre-folding units, and with the folding plate and folding platform 8 angled together, the two sides of the upper paper base film 3 or other film passing through the pre-folding unit can be bent upwards by 90°, while the side folding length is consistent with the interval width of the side conveyor belt, i.e., the limiting height is consistent. The purpose of the pre-folding unit is to ensure that the channel formed by the folded upper paper base film 3 or other film and the lower paper base film 6 or other film fits into the limiting channel 5 enclosed by the four side conveyor components. In addition, an anti-adhesion coating is sprayed at the seams of the side conveyor components to prevent the foamed material from contacting the side conveyor belt and sticking together. This ensures the structural stability of the coated material during the limiting foaming process, achieving the goal of continuous limiting foaming production.

[0039] This coating machine can precisely control the thickness of sponge foam by using only the limiting channel 5, provided the formula and amount of coating raw materials are fixed. Furthermore, the machine has a simple structure and is easy to operate, greatly reducing production difficulty and cost, while improving efficiency and coating quality. It can be widely used in various production fields requiring foaming with limiting capabilities.

[0040] This invention uses PLC control to keep the foaming material relatively stationary relative to the limiting surface within the limiting channel 5, ensuring its structural stability during the limiting foaming and molding process. Compared to existing technologies, this coating machine can complete the limiting foaming and molding of foaming materials, including precise control of foaming height and width, without damaging the appearance, structure, or performance; and improves efficiency.

[0041] In some alternative embodiments, the folding assembly includes a folding plate and a folding platform 8, the folding plate including a first set of folding plates and a second set of folding plates, the first set of folding plates and the second set of folding plates being disposed on both sides of the folding platform 8.

[0042] The first set of folding plates includes three first folding plates 7, namely 7-1, 7-2, and 7-3; the angles between the three first folding plates and the folding platform 8 are 91°~180°, 91°~179°, and 90°, respectively. The value of 91°~180° must be greater than or equal to the value of 91°~179°, and the last angle of 90° cannot be changed.

[0043] The second set of folding plates includes three second folding plates 9, namely 9-1, 9-2, and 9-3; the angles between the three second folding plates 9 and the folding platform 8 are 91°~180°, 91°~179°, and 90°, respectively. The values ​​of 91°~180° must be greater than or equal to the values ​​of 91°~179°, and the last angle of 90° cannot be changed, so that the two sides of the upper paper base film 3 or other film passing through the pre-folding unit are bent upward by 90°, and at the same time, the side folding length of the upper paper base film 3 or other film is consistent with the interval width of the side conveyor belt, that is, the limiting height is consistent.

[0044] In some alternative embodiments, the side conveying assembly includes a servo motor 14 and four side conveyor belts, as well as four side conveyor belt support steel plates 15. The servo motor 14 drives the side conveyor belts to rotate, and the four side conveyor belts and the four side conveyor belt support steel plates 15 form the limiting channel 5.

[0045] By setting the servo motor 14, the side conveyor belt can be driven to rotate, thereby transporting the upper paper base film 3 and the lower paper base film 6. The side conveyor belt support steel plate 15 limits and fixes the foaming material, and ensures its structural stability during the limiting foaming process, so that it is shaped into the specified shape, increasing the overall strength of the limiting channel 5.

[0046] In the limiting channel 5, the PLC controls four servo motors 14, which in turn control four side conveyor belts. The four side conveyor belts then control the speed and direction of the material movement, ensuring that the foam material is accurately coated in the limiting channel 5.

[0047] The four side conveyor belts are an upper conveyor belt 10, a lower conveyor belt 12, a left conveyor belt 11, and a right conveyor belt 13. The upper conveyor belt 10 is located at the top, the lower conveyor belt 12 is located at the bottom, and the left conveyor belt 11 and the right conveyor belt 13 are located on both sides. The four side conveyor belts support the steel plate 15 to form a limiting channel 5.

[0048] The servo motor 14 increases the conveying accuracy of the side conveyor belt.

[0049] In this embodiment, the height of the limiting channel 5 is less than or equal to 20mm. The limiting width can be set according to actual conditions.

[0050] The anti-adhesion coating is a Teflon coating, a polytetrafluoroethylene coating, or a plasma coating.

[0051] In some optional embodiments, the coating machine further includes an upper correction unit 16 and a lower correction unit 17, wherein the upper paper base film 3 is wound on the upper correction unit 16 and the lower paper base film 6 is wound on the lower correction unit 17.

[0052] By setting up the upper correction unit 16 and the lower correction unit 17, the upper paper base film 3 and the lower paper base film 6 can be adjusted to ensure stable conveying of the upper paper base film 3 and the lower paper base film 6.

[0053] After the upper paper base film 3 or other film enters the pre-folding unit through the upper correction unit 16, it completes a 90° upward fold on both sides. The lower paper base film 6 or other film passes through the lower correction unit 17 and the lower drive roller 20 to fit with the folded upper paper base film 3 or other film. It then enters the cubic limiting channel 5 formed by the four side conveying components for limiting foaming.

[0054] In some optional embodiments, the coating machine further includes a coating head 18 disposed on the main conveyor belt 4 and the lower paper base film 6. The coating head 18 is configured to coat the foaming material on the lower paper base film 6.

[0055] Example 1

[0056] The limiting channel 5 has a height of 5mm and a width of 800mm. The angles between the three first folding plates 7-1, 7-2, and 7-3 and the folding platform 8 are 150°, 120°, and 90°, respectively. The angles between the three second folding plates 9-1, 9-2, and 9-3 and the folding platform 8 are 150°, 120°, and 90°, respectively.

[0057] Example 2

[0058] The limiting channel 5 can also be limited to a height of 10mm and a width of 1200mm. The angles between the three first folding plates 7-1, 7-2, and 7-3 and the folding platform 8 are 175°, 155°, and 90°, respectively; the angles between the three second folding plates 9-1, 9-2, and 9-3 and the folding platform 8 are 125°, 105°, and 90°, respectively.

[0059] Example 3

[0060] The limiting channel 5 can also be limited to a height of 2mm and a width of 600mm. The angles between the three first folding plates 7-1, 7-2, and 7-3 and the folding platform 8 are 125°, 105°, and 90°, respectively; the angles between the three second folding plates 9-1, 9-2, and 9-3 and the folding platform 8 are 175°, 155°, and 90°, respectively.

[0061] The operation method of the coating machine is as follows: The foam material to be coated is poured in a Z-shape onto the lower paper base film 6 or other film on the main conveyor belt 4 through the casting machine. After passing through the coating head 18, the upper paper base film 3 or other film enters the pre-folding unit through the upper correction unit 16 and fits with the lower paper base film 6 or other film. It then enters the cubic limiting channel 5 formed by the upper conveyor belt 10, left conveyor belt 11, lower conveyor belt 12, right conveyor belt 13, and corresponding side conveyor belt support steel plates 15 for limiting foaming. In the limiting channel 5, four side conveyor components controlled by four servo motors 14 limit and fix the foam material to ensure its structural stability during the limiting foaming process and shape it into the specified shape.

[0062] During the coating process, the servo motor 14, controlled by a PLC, controls the speed and direction of the foam material, ensuring precise coating of the foam material within the limiting channel 5. After the foaming is completed, the material is demolded and transported out from the limiting channel 5. During demolding, the anti-stick coating ensures that the foam material does not experience pulling or tearing, resulting in smooth demolding, a smooth finished product surface, no tearing at the edges, uniform cell structure and texture, excellent performance, and continuous production capability.

[0063] Comparative Example 1

[0064] The limiting channel 5 has a height of 5mm and a width of 800mm, which is completely consistent with the composition of the coating machine in Example 1. The only difference is that although there is a pre-folding unit, the angles between the three first folding plates 7-1, 7-2, and 7-3 and the folding platform 8 are 180°, 180°, and 180°, respectively, and the angles between the three second folding plates 9-1, 9-2, and 9-3 and the folding platform 8 are 180°, 180°, and 180°, respectively.

[0065] The foam material to be coated is poured in a Z-shape onto the lower paper base film 6 or other film on the main conveyor belt 4 via a casting machine. After passing through the coating head 18, the upper paper base film 3 or other film enters the pre-folding unit through the upper correction unit 16. Due to the failure of the pre-folding unit, the width of the upper paper base film 3 or other film is greater than the width of the cubic limiting channel 5 formed by the upper conveyor belt 10, left conveyor belt 11, lower conveyor belt 12, right conveyor belt 13, and the corresponding side conveyor belt support steel plate 15, thus preventing it from entering the channel to participate in limiting foaming. Furthermore, the upper paper base film 3 or other film accumulates and folds, damaging the flatness of the material.

[0066] During the coating process, the servo motor 14, controlled by a PLC, controls the speed and direction of the foam material, ensuring precise coating within the limiting channel 5. After foaming is completed, the material cannot be smoothly demolded from the limiting channel 5. During demolding, the foam material adheres to the side conveyor belts, causing pulling and tearing, resulting in uneven demolding, rough surface, torn edges, uneven cell structure and texture, substandard performance, and inability to produce continuously. This is mainly due to the adhesion of the foam material to the side conveyor belts and the upper conveyor belt 10, requiring the equipment to be disassembled and cleaned before use. Furthermore, the upper paper base film 3 or other films may accumulate and fold, necessitating the reinstallation of the entire paper base film conveyor unit.

[0067] Comparative Example 2

[0068] The limiting channel 5 has a height of 5mm and a width of 800mm. The angles between the three first folding plates 7-1, 7-2, and 7-3 and the folding platform 8 are 150°, 120°, and 90°, respectively; the angles between the three second folding plates 9-1, 9-2, and 9-3 and the folding platform 8 are 150°, 120°, and 90°, respectively. The composition is completely identical to the coating machine in Example 1, the only difference being the absence of the left conveyor belt 11 and the right conveyor belt 13, and the corresponding supporting steel plates 15 for the left and right conveyor belts 11 and 13.

[0069] The foam material to be coated is poured in a Z-shape onto the lower paper base film 6 or other film on the main conveyor belt 4 via a casting machine. After passing through the coating head 18, the upper paper base film 3 or other film enters the pre-folding unit through the upper correction unit 16 and fits with the lower paper base film 6 or other film. It then enters the limiting channel 5, which is formed by the upper conveyor belt 10, the lower conveyor belt 12, and the corresponding supporting steel plates 15 for the upper and lower conveyor belts 10 and 12, for limiting foaming. In the limiting channel 5, the upper and lower side conveyor components controlled only by the upper and lower servo motors 14 cannot effectively limit and fix the foam material, so the structural stability of the foam material during the limiting foaming process cannot be guaranteed.

[0070] During the coating process, the servo motor 14, controlled by a PLC, controls the speed and direction of the foam material, ensuring precise coating within the limiting channel 5. After foaming is completed, the material cannot be smoothly demolded from the limiting channel 5. During demolding, the foam material adheres to the side conveyor belt, causing pulling and tearing, resulting in uneven demolding. The finished product is semi-circular, with edges overflowing into the machine, uneven cell structure and texture, substandard performance, and inability to produce continuously. This is mainly due to the foam material overflowing into the machine from the side conveyor assembly before curing. The side conveyor assembly must be removed and cleaned before reuse.

[0071] Comparative Example 3

[0072] The limiting channel 5 has a height of 5mm and a width of 800mm. The angles between the three first folding plates 7-1, 7-2, and 7-3 and the folding platform 8 are 150°, 120°, and 90°, respectively; the angles between the three second folding plates 9-1, 9-2, and 9-3 and the folding platform 8 are 150°, 120°, and 90°, respectively. The composition is completely identical to the coating machine in Example 1, the only difference being the absence of the upper conveyor belt 10 and the lower conveyor belt 12, and the corresponding supporting steel plates 15 for the upper conveyor belt 10 and the lower conveyor belt 12.

[0073] The foam material to be coated is poured in a Z-shape onto the lower paper base film 6 or other film on the main conveyor belt 4 via a casting machine. After passing through the coating head 18, the upper paper base film 3 or other film enters the pre-folding unit through the upper correction unit 16 and fits with the lower paper base film 6 or other film. It then enters the limiting channel 5, which is formed by the left conveyor belt 11, the right conveyor belt 13, and the corresponding side support steel plates 15 of the left and right conveyor belts 11 and 13, for limiting foaming. In the limiting channel 5, the left and right side conveyor components controlled only by the left and right servo motors 14 cannot effectively limit and fix the foam material, so the structural stability of the foam material during the limiting foaming process cannot be guaranteed.

[0074] During the coating process, the servo motor 14, controlled by a PLC, controls the speed and direction of the foam material, ensuring precise coating within the limiting channel 5. After the foaming is completed, the material cannot be smoothly demolded from the limiting channel 5. During demolding, the foam material adheres to the side conveyor belt, causing pulling and tearing, resulting in uneven demolding. The finished product has an arc-shaped upper and lower surface, overflows into the machine at the edges, has uneven cell structure and texture, fails to meet performance standards, and cannot be continuously produced. This is mainly due to the lack of effective limiting by the upper and lower side conveyor components, leading to a phenomenon similar to free foaming. Additionally, before curing, the foam material overflows from the side conveyor components into the machine, requiring removal and cleaning before reuse.

[0075] The present invention also provides a coating system, including the coating machine described above; and further including a casting head 19, the casting head 19 being disposed above the main conveyor belt 4, the casting head 19 being used to cast foaming material onto the lower paper base film 6.

[0076] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A coating machine, characterized in that, include: The pre-folding unit includes a folding assembly and a folding roller (1) and a folding drive roller (2). The folding assembly includes a folding plate and a folding platform (8). The folding plate and the folding platform (8) are set at an angle. The upper paper base film (3) passes through the folding assembly and then through the gap between the folding roller (1) and the folding drive roller (2) to complete the upward folding. The main conveyor belt (4) is equipped with four side conveyor components, which form a limiting channel (5) and are coated with an anti-adhesion coating at the joint of the side conveyor components. The lower paper base film (6) is placed on the main conveyor belt (4) and foam material is provided on the lower paper base film (6). The lower paper base film (6) and the upper paper base film (3) that has been folded together enter the limiting channel (5) for limiting foaming. The folding plate includes a first set of folding plates and a second set of folding plates, which are located on both sides of the folding platform (8). The first set of folding plates includes three first folding plates (7), and the angles between the three first folding plates (7) and the folding platform (8) are 91°~180°, 91°~179°, and 90°, respectively; The second set of folding plates includes three second folding plates (9), and the angles between the three second folding plates (9) and the folding platform (8) are 91°~180°, 91°~179°, and 90°, respectively; It also includes a coating head (18), which is located on the main conveyor belt (4) and the lower paper base film (6); With the pre-folding unit set, the folding plate and the folding platform (8) are set at 90°, and the side folding length is consistent with the interval width of the side conveyor belt.

2. The coating machine according to claim 1, characterized in that, The side conveyor assembly includes a servo motor (14), four side conveyor belts, and four side conveyor belt support steel plates (15). The servo motor (14) drives the side conveyor belts to rotate, and the four side conveyor belts and the four side conveyor belt support steel plates (15) form a limiting channel (5).

3. The coating machine according to claim 2, characterized in that, The height of the limiting channel (5) is less than or equal to 20mm.

4. The coating machine according to claim 3, characterized in that, It also includes an upper correction unit (16) and a lower correction unit (17), with the upper paper base film (3) wound on the upper correction unit (16) and the lower paper base film (6) wound on the lower correction unit (17).

5. A coating system, characterized in that, The coating machine included in any one of claims 1-4.

6. The coating system according to claim 5, characterized in that, It also includes a casting head (19), which is located above the main conveyor belt (4) and is used to cast foam material onto the lower paper base film (6).

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