A surface finishing machine for PVC decorative film with high adhesion and a finishing process thereof

Abstract

This invention discloses a surface coating machine for high-adhesion PVC decorative film, relating to the technical field of surface coating machines for high-adhesion PVC decorative film. The machine includes a coating machine, a support frame, a roller, and a first component. The roller is mounted on the support frame. The first component includes a detection body threaded to the end of the roller. The first component, through synchronous rotation of the detection body and the roller, uses a marking pen to draw monitoring lines on the frustum surface of the detection body. Operators can visually observe the markings to accurately distinguish between two different types of roller position anomalies. For rollers parallel to the conveying surface but with axial misalignment and excessive coaxiality at both ends, the degree of misalignment can be determined by the presence and spacing of multiple concentric linear marks. For rollers not parallel to the conveying surface and with axial misalignment, the degree of misalignment and movement can be determined by the irregular trajectory shape, thus achieving precise positioning and degree assessment of roller position anomalies.

Description

Technical Field

[0001] This invention relates to the technical field of surface coating machines for high-adhesion PVC decorative films, specifically to a surface coating machine for high-adhesion PVC decorative films and its coating process. Background Technology

[0002] In various fields such as furniture manufacturing, interior decoration, building materials, and automotive interiors, high-adhesion decorative films have been widely used to achieve both decorative and protective effects, gradually replacing traditional materials such as solid wood, paint, and tiles. Due to their convenient construction methods and excellent performance, they have become the mainstream choice in the industry. In existing technologies, high-adhesion PVC decorative films are typically modified with a substrate. This involves adhering the decorative film to the surface of the substrate to create a finished product with the PVC decorative film. Specifically, this production process mainly relies on rollers to drive the PVC decorative film while other transmission equipment conveys the substrate, causing the roller-driven PVC decorative film and the cooperating substrate material to adhere to each other, thus obtaining the finished product.

[0003] However, during long-term production operation, existing coating equipment has many drawbacks, seriously affecting production efficiency and product quality. As the equipment's operating time increases, the rollers often deform or shift due to various factors, leading to a mismatch between the rollers, the PVC decorative film, and the substrate. Specifically, this manifests as misalignment between the roller axis and the conveying surface, and excessive misalignment at both ends. Such mismatches easily cause abnormal tension, resulting in a series of adverse production conditions. This not only causes the PVC decorative film to experience localized stretching, misalignment, and wrinkling, but also affects the adhesion between the decorative film and the substrate, reducing finished product quality and increasing production losses. Meanwhile, significant issues arise in the selection and use of adhesives during the adhesion of decorative films to substrates. Traditional oil-based adhesives suffer from drawbacks such as high VOC content, strong odor, and flammability / explosiveness, hindering continuous and automated production. Therefore, most manufacturers prefer water-based adhesives for adhesion. However, water-based adhesives are highly sensitive to environmental conditions, a sensitivity also observed in other adhesives. In low-temperature environments, the viscosity of water-based adhesives increases significantly, resulting in poor leveling performance and reduced coating uniformity. In high-humidity environments, moisture in water-based adhesives is difficult to evaporate, easily causing defects such as fogging, whitening, and re-adhesion on the film surface. Fluctuations in these environmental conditions directly lead to poor batch-to-batch product stability. Existing technologies have significant shortcomings in controlling and managing environmental conditions, failing to effectively address these problems and further exacerbating product quality instability. Furthermore, after production, dry adhesive dots and impurities often remain on the roller surface. If these residues are not treated promptly, they will transfer to the PVC decorative film surface during subsequent production processes, causing defects such as bumps, dirt spots, and pitting, thus compromising the overall smoothness of the product. More seriously, these residues, combined with improper temperature and humidity control, can also lead to continuous drag marks, horizontal stripes, and unevenly wide bands on the film surface, further reducing the product's appearance and performance, and even causing the entire batch to be scrapped, increasing production costs.

[0004] In summary, there is an urgent need for a surface coating machine for high-adhesion PVC decorative film that can monitor whether the shaft mismatches with the PVC decorative film and substrate during operation, causing tension problems and resulting in localized stretching, deviation, wrinkling, and deformation of the PVC decorative film, which are detrimental to production; improve the colloidal state, avoid the influence of temperature / humidity on the colloidal state, maintain the overall temperature of the PVC decorative film during transmission, and prevent sticking, delamination, and poor adhesion between the decorative film and the substrate during production; and perform surface maintenance treatment on the roller body. Summary of the Invention

[0005] In view of this, the present invention proposes a surface coating machine for high-adhesion PVC decorative film to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a surface coating machine for high adhesion PVC decorative film, comprising: a coating machine, a support frame, and further comprising: a roller body and a first component; The roller body is mounted on a support. The first component includes a detection body threaded to the end of the roller body. A support platform is fixedly connected to the inner side wall of the support. Guide rails are symmetrically fixedly connected to the support platform. Insertion slots are provided at equal intervals on the guide rails. Limiting pieces are inserted into the insertion slots. A sliding block is slidably connected to the guide rail, and a limiting component is fixedly connected to the sliding block. A circular opening is provided through the limiting component. A timer is fixedly connected to the limiting member, and an electrically controlled telescopic rod is fixedly connected to the limiting member. A marker pen is provided at the telescopic end of the electrically controlled telescopic rod.

[0007] As an improvement, it also includes a conveyor shaft, a transmission platform, and a shaft rod. The conveyor shaft is rotatably connected to the bracket, the transmission platform is mounted on the coating machine, and the shaft rod is inserted and fixedly connected to the end of the roller. The plane containing the roller is higher than the plane containing the conveyor shaft.

[0008] As an improvement, a second component is also included; The second component includes a first channel and a second channel formed in the roller body. A flow rate monitoring device is fixedly connected to the side wall of the coating machine's casing. A water pipe is fixedly connected to one end of the flow rate monitoring device. A rotary joint is sleeved on the end of the water pipe away from the flow rate monitoring device. The end of the rotary joint away from the water pipe is inserted into the shaft.

[0009] As an improvement, a semi-circular shell is clamped on the roller body, a magnet is provided on the inner wall plane of the semi-circular shell, a handle is fixedly connected to the outer arc surface of the semi-circular shell, a cleaning scraper is fixedly connected to the inner arc surface of the semi-circular shell, and a wiping cotton is fixedly connected to the middle of the inner arc surface of the semi-circular shell.

[0010] As an improvement, the detection body is frustum-shaped; and the detection bodies at both ends of the roller body have a tapered difference, that is, one end has a large tapered diameter and the other end has a small tapered diameter.

[0011] As an improvement, the flow rate monitoring device is connected to pipes for transmitting water at both ends. One end is a water pipe connected to a rotary joint, and the other end is connected to an external water supply device. The water pipe, rotary joint, flow rate monitoring device, and the pipe body on it are symmetrically distributed in two sets with rollers and hollow shafts, and together with the first channel, the second channel, and the external water supply device, they form a water circulation system.

[0012] Furthermore, the coating process for high-adhesion PVC decorative film includes the following steps: Step 1: Equipment debugging and material preparation before operation Calibrate the monitoring components, adjust the alignment of the roller end detector and the marker pen, and set the working cycle of the electronically controlled telescopic rod; adjust the temperature control circulation system to form a closed water circuit, introduce constant temperature water until the flow rate monitoring device displays the reference value, and confirm that the roller temperature is uniform. Calibrate the relative positions of the conveying components and adjust the transmission speed of each component to synchronization; Step 2: Substrate Pretreatment The surface of the pre-formed composite substrate is subjected to dust removal, corona treatment or plasma activation to improve the surface energy and micro-roughness of the PVC decorative film, providing a high-adhesion foundation for the subsequent coating layer; the treated substrate is smoothly fed into the coating station by guide rollers to ensure accurate coating position without deviation. The substrate is brought to the bonding station, ready for the synchronous lamination and rolling of the PVC decorative film and the substrate.

[0013] Step 3: Simultaneous lamination and rolling of PVC decorative film and substrate Start the roller drive system to drive the decorative film and the substrate to be transported at the same speed and precisely aligned and bonded at the bonding station; The film base is tightly bonded by roller pressure, with the pressure controlled at 0.3-0.5MPa, so that the adhesive layer is spread out without air bubbles. Maintain the operation of the water circulation temperature control system, and transfer a constant temperature of 25-35℃ to the bonding surface through the roller to maintain the leveling properties of the adhesive layer; Step 4: Quality monitoring and dynamic control of the bonding process Observe the marking trajectory on the surface of the test object. If there is any abnormality, stop the machine and correct its coaxiality and installation position. Restart the machine after it returns to normal. Adjust the water temperature of the water circulation system according to the ambient temperature and humidity, setting it to 30-40℃ in low temperatures and 35-40℃ in high humidity to optimize the state of the adhesive layer. The flow rate monitoring device values ​​are monitored in real time. If the values ​​deviate from the reference value, the machine is stopped for inspection, repair, or replacement of the rollers.

[0014] Step 5: Post-bonding curing and finished product winding The film-based composite is transported to the subsequent curing station via a transmission platform and cured at room temperature and ventilation for 20-30 minutes to ensure the adhesive layer is fully dry. The high-adhesion PVC decorative film composite substrate is cured and shaped to eliminate internal stress, and its dimensions and surface flatness are checked. Finally, the finished product is neatly wound up by a winding device to complete the surface coating process of the high-adhesion PVC decorative film. The winding tension is controlled at 5-8N, the film is wound flat, and it is marked according to specifications and batch. Step Six: Post-operation equipment cleaning and maintenance Keep the water circulation temperature control system working to maintain the roller body at 30-35℃, softening residual dry glue and impurities on the surface; The two semi-circular shells are magnetically spliced ​​and clipped to the roller body. The handle is held and moved axially. The surface residue is removed by a cleaning scraper and a wiping cotton. After cleaning and maintenance, check the tightness of all component connections and add lubricant to the conveyor shaft and rollers.

[0015] Compared with the prior art, the present invention provides a surface coating machine for high-adhesion PVC decorative film, which has the following beneficial effects: 1. The design of the first component in this invention provides the following advantages: This system enables precise monitoring and rapid identification of roller position anomalies, effectively avoiding mismatches between the roller and the PVC decorative film / substrate. The first component, through the synchronous rotation of the detection body and the roller, uses a marker to draw monitoring lines on the frustum of the detection body. Operators can quickly determine whether the roller has deformed or shifted by visually observing the markings. No complex detection equipment or specialized operating skills are required; the monitoring method is simple, convenient, intuitive, and efficient. Simultaneously, this component can accurately distinguish between two different types of roller position anomalies. For rollers parallel to the conveyor surface but with axial misalignment and excessive coaxiality at both ends, the degree of misalignment can be determined by the presence and spacing of multi-ring concentric lines. For rollers not parallel to the conveyor surface and with axial misalignment, the degree of misalignment and movement can be determined by the irregular trajectory pattern, achieving precise location and severity assessment of roller position anomalies. Effectively avoids abnormal tension and subsequent production defects, and improves product quality stability: Through real-time monitoring of roller deformation and displacement by the first component, operators can promptly detect roller mismatch issues and quickly take adjustment measures to avoid tension fluctuations caused by abnormal roller positions. This eliminates unfavorable production conditions such as local stretching, deviation, and wrinkling of PVC decorative film due to tension changes, ensuring the integrity and surface flatness of PVC decorative film, ensuring the adhesion effect between the decorative film and the substrate, reducing production losses, and improving the finished product qualification rate. The structural design is simple and reliable, highly adaptable and practical: the first component can effectively monitor the position of the roller by using only a detector and a marker pen. The overall structure is simple, without the need for complex electronic components, program control and sensor combinations, resulting in low manufacturing cost, low failure rate and easy installation, maintenance and operation. At the same time, the component can be adapted to rollers of different specifications, which can meet the monitoring needs of various high-adhesion PVC decorative film coating production, with a wide range of applications and strong practicality.

[0016] 2. This invention, through the tapered design of the detection body in the shape of a frustum and the different tapers of the detection bodies at both ends of the roller, can bring the following advantages: Achieving flexible and adjustable monitoring accuracy to adapt to different production monitoring needs: The size of the frustum taper of the detection body directly determines the feedback sensitivity and monitoring accuracy of the monitoring structure. By selectively choosing detection bodies with different tapers, the monitoring level can be flexibly adjusted according to the actual production scenario, roller specifications, and monitoring accuracy requirements. When it is only necessary to quickly identify large deformations and displacements of the roller during the production process, a small taper detection body can be selected; when it is necessary to accurately capture minor coaxiality deviations or axial misalignments of the roller, a large taper detection body can be selected. This eliminates the need to replace the entire monitoring component, reduces monitoring costs, and improves the adaptability and practicality of the components. By differentiating the tapers at both ends, coarse and fine dual-level monitoring is achieved, significantly improving monitoring accuracy and judgment precision: the small taper detector at one end of the roller has lower sensitivity to feedback on roller coaxiality deviations and axial misalignment, enabling coarse monitoring and quickly identifying larger positional anomalies of the roller, avoiding excessive intervention in production due to minor errors and improving monitoring efficiency; the large taper detector at the other end amplifies the signals of minor misalignment and skew errors of the roller, with higher feedback sensitivity, enabling fine monitoring, accurately capturing subtle positional changes of the roller, and ensuring that no potential positional anomalies are missed. The combination of coarse and fine dual-level monitoring ensures both monitoring efficiency and accuracy, resulting in good overall performance; it allows operators to more accurately judge the degree and type of roller positional anomalies. To facilitate accurate identification of the direction and specific location of roller positional anomalies, improving troubleshooting efficiency and enhancing the convenience and reliability of monitoring: Large and small taper detection bodies are installed at both ends of the roller. When an abnormal position occurs on the roller, the monitoring marks drawn on the detection bodies at both ends will show different abnormal shapes—the small taper end can quickly display the general direction of the abnormality, while the large taper end can accurately present the specific details and degree of deviation of the abnormality. By comparing the abnormal state of the marks at both ends, operators can quickly locate the specific location and direction of roller deformation and displacement without the need for complete disassembly of the equipment for troubleshooting, significantly shortening troubleshooting time, reducing equipment downtime losses, and ensuring production continuity.

[0017] 3. The design of the second component in this invention provides the following advantages: Effectively improving the colloidal state and mitigating the adverse effects of temperature and humidity on colloidal performance: The second component, through the construction of a complete water circulation system, can stably transport water at a specific temperature. This stable temperature is then transferred to the bonding surface between the decorative film and the substrate via rollers. This effectively solves the problems of increased viscosity, poor leveling, and uneven coating of water-based coating adhesives in low-temperature environments. Simultaneously, it avoids defects such as fogging, whitening, and re-adhesion caused by the difficulty in evaporating moisture in high-temperature and high-humidity environments. It stabilizes the flowability and wettability of the colloidal material, ensuring uniform coating and fundamentally reducing defects such as sticking, delamination, and poor adhesion during the bonding process between the decorative film and the substrate. This improves the stability of bonding quality and prevents problems such as stretching and deformation of the decorative film due to temperature fluctuations. Furthermore, the stable temperature ensures consistent coating conditions for batches of products, improving batch stability and meeting the needs of continuous and automated production. To facilitate convenient maintenance of the roller surface and ensure its cleanliness: The cleaning structure in the second component adopts a semi-circular shell magnetic splicing design. Operators can use the handle to quickly splice and lock the two semi-circular shells onto the roller using magnets. During movement, the cleaning blade can effectively scrape off dry glue spots, bumps, and other impurities from the roller surface, while the wiping cotton simultaneously assists in wiping the roller surface, achieving thorough removal of impurities and preventing dry glue spots and impurities from being transferred to the PVC decorative film surface as the roller rotates. This eliminates appearance defects such as bumps, dirt spots, and pitting, while also preventing the occurrence of problems such as continuous drag marks, horizontal stripes, and uneven width bands, ensuring the flatness and appearance quality of the product surface. The synergistic effect of cleaning and temperature control improves maintenance efficiency and effectiveness: When maintaining the roller surface, the water circulation system can operate normally, continuously providing stable temperature support for the roller, avoiding the hardening and difficulty in removing residual dry adhesive caused by sudden temperature changes. At the same time, it softens the dry adhesive, assisting the cleaning blade and wiping cotton to improve the cleaning effect, reducing cleaning difficulty and time. This synergistic design eliminates the need for additional auxiliary equipment, realizing integrated operation of roller temperature control and cleaning, improving equipment maintenance efficiency and reducing the workload of operators.

[0018] 4. The present invention, through the design of the flow rate monitoring device, can bring the following advantages: Indirect monitoring of roller deformation enables timely detection of potential roller malfunctions: The flow rate monitoring device is connected to the external circulating water supply device via pipeline. A complete water circulation system is constructed using the first and second channels within the roller. When the roller is in a normal, undeformed state, the channels maintain their normal shape. Water flowing through the flow rate monitoring device at specific pressures and speeds will provide stable standard values. When the roller deforms due to stress or other factors, the internal channels deform accordingly, obstructing water flow. The values ​​reported by the flow rate monitoring device will change significantly. These differences allow for indirect assessment of roller deformation, providing early warning and preventing further deterioration. This also improves the timeliness and targeted nature of roller maintenance. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the appearance of the present invention; Figure 2 This is a front view of the appearance of the present invention; Figure 3 This is a diagram showing the positional distribution of the support structure and related main structures in this invention; Figure 4 This is a schematic diagram showing the positional distribution of the first component on the support and the state in which the semi-circular shell is fastened onto the roller body in this invention; Figure 5 This is a three-dimensional schematic diagram of the main structure of the first component in this invention; Figure 6This is a front view of the main structure of the first component in this invention; Figure 7 This is a disassembled diagram of the first component in this invention; Figure 8 This is a diagram showing the main structural distribution of the second component after the roller body is partially cut in half in this invention. Figure 9 This is a diagram showing the working state of the water circulation system of the second component in this invention; Figure 10 This is a diagram showing the working state of the semi-circular shell, cleaning blade, and wiping cotton used to maintain and treat the surface of the roller in this invention.

[0020] In the picture: 1. Coating machine; 2. Support frame; 3. Conveyor shaft; 4. Transmission platform; 5. Roller; 6. Shaft; First component: 701, detection body; 702, support platform; 703, guide rail; 704, insertion slot; 705, limiting piece; 706, sliding block; 707, limiting component; 708, circular opening; 709, timer; 710, electrically controlled telescopic rod; 711, marking pen; Second component: 801, First channel; 802, Second channel; 803, Water pipe; 804, Rotary joint; 805, Flow rate monitoring device; 806, Semi-circular shell; 807, Handle; 808, Cleaning scraper; 809, Wiping cotton. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] Example Please refer to Figure 1 , Figure 2 , Figures 4 to 7 As shown: To address the problems mentioned in the technical solutions, this invention provides a surface coating machine for high-adhesion PVC decorative film, comprising: a coating machine 1, a support 2, and further comprising: a roller body 5 and a first component; the roller body 5 is disposed on the support 2, and the first component includes a detection body 701 threadedly connected to the end of the roller body 5; a support platform 702 is fixedly connected to the inner side wall of the support 2, and guide rails 703 are symmetrically fixedly connected to the support platform 702; insertion slots 704 are equidistantly opened on the guide rails 703, and limiting pieces 705 are inserted into the insertion slots 704; a sliding block 706 is slidably connected to the guide rails 703, and a limiting element 707 is fixedly connected to the sliding block 706; a circular opening 708 is provided through the limiting element 707; a timer 709 is fixedly connected to the limiting element 707, and an electrically controlled telescopic rod 710 is fixedly connected to the limiting element 707; a marking pen 711 is provided at the telescopic end of the electrically controlled telescopic rod 710; It also includes a conveyor shaft 3, a transmission platform 4, and a shaft 6. The conveyor shaft 3 is rotatably connected to the bracket 2, the transmission platform 4 is set on the coating machine 1, and the shaft 6 is inserted and fixedly connected to the end of the roller body 5. The plane where the roller body 5 is located is higher than the plane where the conveyor shaft 3 is located.

[0024] in: The conveyor shaft 3 is used in conjunction with the transmission platform 4 to convey base material.

[0025] Roller 5 is used to drive the decorative film; the PVC decorative film on roller 5 will be bonded to the substrate material conveyed by conveying shaft 3 and transmission platform 4, thereby producing a finished substrate product with PVC decorative film.

[0026] The shaft 6 is hollow and can be connected to the water pipe 803 for water transfer.

[0027] The end of shaft 6 can be fitted with transmission components such as gear sets, and rotate under the action of drive.

[0028] The first component is used to monitor whether the roller 5 is mismatched with the position of the PVC decorative film and the substrate during the working process, resulting in tension problems, which may cause the PVC decorative film to be forced to stretch locally, deviate, wrinkle and deform, etc., which are detrimental to production.

[0029] The test body 701 is frustum shaped.

[0030] The limiting piece 705 is inserted into the insertion slot 704; when the sliding block 706 slides on the guide rail 703 with the limiting piece 707, and finally the circular through-hole 708 is fitted and attached to the surface of the detection body 701, the two limiting pieces 705 are respectively attached to the two sides of the sliding block 706 and inserted into the limiting piece 705 to limit its position; thus providing a position basis for the operation of the marking pen 711.

[0031] The circular opening 708 is fitted and attached to the detection body 701 during operation.

[0032] There is an electrical connection between the electrically controlled telescopic rod 710 and the timer 709. The timer 709 will periodically control the telescopic rod 710 to extend and retract, and carry the marker pen 711 to move closer to / away from the detection object 701 in stages to draw monitoring marks.

[0033] When the roller 5 rotates, the detection body 701 on the side of the roller 5 will also rotate accordingly. At this time, the marking pen 711 will draw a monitoring mark on the frustum surface of the detection body 701; there are two situations, normal and abnormal, as follows. Normal state: When roller 5 is normal, without skew or misalignment; roller 5 rotates → marker pen 711 draws a closed circle on the frustum, and the circle will always coincide on the same line after repeated rotation.

[0034] Abnormal situation 1: Roller 5 is parallel to the conveying surface, but the axis of roller 5 is skewed and the coaxiality of both ends is out of tolerance; The relative position of the rotation center of the detection body 701 and the marker pen 711 is periodically offset radially; the marker pen 711 will not always draw on the same circumference line, but will draw a set of concentric circles that are parallel to each other but staggered from each other. The lines are circular in shape, but the center of the circle is offset, forming a multi-ring concentric line mark; and the greater the misalignment, the greater the distance between the concentric circles.

[0035] Abnormal situation 2: Roller 5 is not parallel to the conveying surface, and the axis of roller 5 is skewed and the coaxiality of the two ends is out of tolerance. When the detector 701 rotates, it exhibits not only radial runout but also axial movement and tilting oscillation. The marking pen 711 no longer draws regular circles on its frustum surface, but rather wavy, elliptical, spiral, and oblique arcs. Each circle's trajectory is non-overlapping, non-closed, and irregular. Oblique scratches, discontinuous arcs, and band-like marks of varying widths appear. In severe cases, it can form a blurry, irregular band of trajectory that is completely impossible to overlap.

[0036] Note: The smaller the frustum-shaped taper of the detection body 701 (the closer it is to a cylinder), the smaller the axial movement of the marking pen tip 711 on it, and the less sensitive it is to minor deviations and misalignments; the monitoring accuracy is low. In specific implementation, the taper of the detection bodies 701 at both ends of the roller 5 can be differentiated (i.e., one end has a larger taper and the other end has a smaller taper), which can effectively achieve coarse and fine dual-level monitoring and higher monitoring accuracy.

[0037] It can be implemented on equipment with low precision requirements, or it can be implemented in conjunction with relevant infrared monitoring sensors on equipment with high precision deviation requirements, so as to achieve both sensor monitoring end and human visual end, and improve the overall monitoring completeness.

[0038] A further embodiment: Please refer to Figures 1 to 3 , Figure 5 , Figures 7 to 10 As shown: The second component includes a first channel 801 and a second channel 802 opened inside the roller body 5. A flow rate monitoring device 805 is fixedly connected to the side wall of the cover of the coating machine 1. A water pipe 803 is fixedly connected to one end of the flow rate monitoring device 805. A rotary joint 804 is sleeved on the end of the water pipe 803 away from the flow rate monitoring device 805. The end of the rotary joint 804 away from the water pipe 803 is inserted into the shaft 6. A semi-arc shell 806 is clamped on the roller body 5. A magnet is provided on the inner wall plane of the semi-arc shell 806. A handle 807 is fixedly connected to the outer arc surface of the semi-arc shell 806. A cleaning scraper 808 is fixedly connected to the inner arc surface of the semi-arc shell 806. A wiping cotton 809 is fixedly connected to the middle of the inner arc surface of the semi-arc shell 806.

[0039] in: The second component is used to improve the state of the colloid, avoid the influence of temperature / humidity on the colloid state, maintain the overall temperature of the roller 5, and avoid sticking, delamination, and poor adhesion during the production of the decorative film and the substrate, especially for water-based coating adhesives. At the same time, the second component can help maintain the surface cleanliness of the roller 5, and prevent dry glue spots and impurities on the roller 5 from being transferred to the surface of the PVC decorative film as the roller 5 rotates, forming bumps, dirt spots, pitting, damaging the flatness of the overall product, and even producing continuous drag marks, horizontal stripes, uneven width bands, etc.

[0040] The state of the colloid under various conditions is as follows: Low temperature: increased viscosity, poor leveling, uneven coating. High humidity: moisture is difficult to evaporate, resulting in a hazy, white, and sticky film surface. All of these environmental fluctuations directly lead to poor batch stability of the product.

[0041] The flow rate monitoring device 805 is connected to water pipes at both ends. One end is a water pipe 803 connected to the rotary joint 804, and the other end is connected to an external water supply device. The water pipe 803, rotary joint 804, flow rate monitoring device 805 and the pipe body on it are symmetrically distributed in two groups with the roller body 5 and the hollow shaft 6. Together with the first channel 801, the second channel 802 and the external water supply device, they form a water circulation system. This is to provide stable temperature assistance when the roller body 5 drives the PVC decorative film to adhere to the substrate, and reduce the occurrence of problems such as sticking, delamination and poor adhesion.

[0042] The flow rate monitoring device 805 and the external circulating water supply device are connected by a pipeline. When the roller body 5 is in a normal, undeformed state, the first channel 801 and the second channel 802 inside it are in normal condition. When water under a specific pressure and speed passes through the flow rate monitoring device 805, the monitoring feedback value is A, which is the standard value. When the roller body 5 is deformed due to stress or other factors, the first channel 801 and the second channel 802 will also deform. At this time, when water under a specific pressure and speed passes through the flow rate monitoring device 805, the value will change due to the deformation of the first channel 801 and the second channel 802, resulting in a value B. The controller, which is electrically connected to the flow rate monitoring device 805, will then be aware of this change, thereby indirectly reminding relevant personnel to maintain or replace the roller body 5 to ensure the standardized and stable operation of production.

[0043] The inner wall plane of the semi-arc shell 806 is provided with a magnet, which can cause the two semi-arc shells 806 to be magnetically attracted and stabilized on the roller body 5 during use.

[0044] In addition to its operation during production, the water circulation system within the second component also provides temperature support during the cleaning and maintenance of the roller 5 surface, facilitating the cleaning of dry adhesive, bumps, and other imperfections on the roller 5, saving time and effort.

[0045] When maintaining the surface of roller 5, the water circulation system works normally, providing temperature support; at the same time, the operator uses the hand handle 807 to magnetically connect the two semi-circular shells 806. Furthermore, by moving the semi-circular shells 806 that are locked on roller 5, the cleaning scraper 808 on them will scrape off dry glue, bumps and other impurities, and the wiping cotton 809 will perform auxiliary wiping of the surface of roller 5.

[0046] A further embodiment: The coating process for high-adhesion PVC decorative film includes the following steps: Step 1: Equipment debugging and material preparation before operation Calibrate the monitoring components, adjust the mating position of the end detection body 701 and the marker pen 711 of the roller body 5, and set the working cycle of the electric telescopic rod 710; adjust the temperature control circulation system to form a closed water circuit, and introduce constant temperature water to the flow rate monitoring device 805 to display the reference value to confirm that the temperature transmission of the roller body 5 is uniform. Calibrate the relative positions of the conveying components and adjust the transmission speed of each component to synchronization; Step 2: Substrate Pretreatment The surface of the pre-formed composite substrate is subjected to dust removal, corona treatment or plasma activation to improve the surface energy and micro-roughness of the PVC decorative film, providing a high-adhesion foundation for the subsequent coating layer; the treated substrate is smoothly fed into the coating station by guide rollers to ensure accurate coating position without deviation. The substrate is brought to the bonding station, ready for the synchronous lamination and rolling of the PVC decorative film and the substrate.

[0047] Step 3: Simultaneous lamination and rolling of PVC decorative film and substrate Start the roller 5 drive system to drive the decorative film and the substrate to be transported at the same speed and precisely aligned and bonded at the bonding station; The film base is tightly bonded by roller pressing with pressure controlled at 0.3-0.5 MPa, ensuring that the adhesive layer is spread without air bubbles. Maintain the operation of the water circulation temperature control system, and transfer a constant temperature of 25-35℃ to the bonding surface through roller 5 to maintain the leveling of the adhesive layer; Step 4: Quality monitoring and dynamic control of the bonding process Observe the marking trajectory on the surface of the test object 701. If there is any abnormality, stop the machine and correct its coaxiality and installation position. Restart the machine after it returns to normal. Adjust the water temperature of the water circulation system according to the ambient temperature and humidity, setting it to 30-40℃ in low temperatures and 35-40℃ in high humidity to optimize the state of the adhesive layer. The flow rate monitoring device 805 is monitored in real time. If the value deviates from the reference value, the machine is stopped for inspection, repair, or replacement of the roller 5.

[0048] Step 5: Post-bonding curing and finished product winding The film-based composite is conveyed to the subsequent curing station via the transmission platform 4 and cured at room temperature and ventilation for 20-30 minutes to ensure that the adhesive layer is fully dried. The high-adhesion PVC decorative film composite substrate is cured and shaped to eliminate internal stress, and its dimensions and surface flatness are checked. Finally, the finished product is neatly wound up by a winding device to complete the surface coating process of the high-adhesion PVC decorative film. The winding tension is controlled at 5-8N, the film is wound flat, and it is marked according to specifications and batch. Step Six: Post-operation equipment cleaning and maintenance Keep the water circulation temperature control system working to maintain the roller body 5 at 30-35℃, softening residual dry glue and impurities on the surface; Two semi-circular shells 806 are magnetically spliced ​​and clipped onto the roller body 5. The handle 807 is moved axially by hand, and the surface residue is removed by the cleaning scraper 808 and the wiping cotton 809. After cleaning and maintenance, check the tightness of each component connection and add lubricant to the conveyor shaft 3 and roller 5.

[0049] The working process of this coating machine 1, as described in the above embodiments, revolves around the core production process of bonding PVC decorative film to the substrate. Simultaneously, it performs auxiliary tasks such as monitoring the position of roller 5, adjusting the colloid state for temperature and humidity adaptation, and maintaining the surface of roller 5. The overall process is divided into three stages: pre-production debugging, production operation, and post-production maintenance. The core components of each stage operate collaboratively. The specific process is as follows: I. Pre-production debugging stage Roller 5 monitoring component debugging: Connect the detection body 701 to both ends of the roller 5 by threading it, push the sliding block 706 to slide along the guide rail 703, so that the circular through-hole 708 on the limiting piece 707 fits and adheres to the surface of the detection body 701, insert the limiting piece 705 into the insertion groove 704 to limit the position of the sliding block 706, and complete the positioning of the first component; preset the extension and retraction cycle of the electronically controlled telescopic rod 710 by the timer 709, so that the marking pen 711 can move closer to / away from the detection body 701 in stages, in preparation for the position monitoring of the roller 5.

[0050] Temperature control circulation system debugging: Insert one end of the rotary joint 804 into the hollow shaft 6, and connect the other end to the water pipe 803 and the flow rate monitoring device 805 to ensure that the water pipe 803, rotary joint 804, flow rate monitoring device 805, the first channel 801 and the second channel 802 in the roller body 5 and the external water supply device form a closed water circulation system; start the external water supply device, adjust the water flow rate and temperature, observe the standard value fed back by the flow rate monitoring device 805, and confirm that there is no leakage in the circulation system and that the roller body 5 can conduct temperature evenly.

[0051] Debugging of conveying and transmission components: Check the rotation and conveying status of the conveying shaft 3 and the transmission platform 4, and confirm that the plane where the roller 5 is located is higher than the conveying shaft 3 and the transmission platform 4 is between the two to ensure that the transmission path of the substrate and the PVC decorative film is matched and the bonding can be completed smoothly.

[0052] II. Production Operation Stage This phase involves four simultaneous tasks: conveying and bonding the substrate and decorative film, real-time monitoring of the roller 5 position, temperature control and adjustment of the colloid state, and indirect early warning of roller 5 deformation. All processes are carried out in a coordinated manner. Conveying and bonding the substrate and decorative film: The conveying shaft 3 and the transmission platform 4 work together to complete the stable conveying of the substrate material; the roller 5 rotates under the transmission of the shaft 6, driving the PVC decorative film to be conveyed synchronously, so that the decorative film and the substrate conveyed to the designated position are bonded together on the bonding surface, realizing the initial forming of the substrate product with PVC decorative film.

[0053] Real-time monitoring of the position of roller 5: When roller 5 rotates, the detection bodies 701 at both ends rotate synchronously. Timer 709 controls the extension of the electrically controlled telescopic rod 710 according to a preset cycle, so that the marking pen 711 contacts the frustum surface of the detection body 701 and draws the monitoring mark. If the roller 5 is not skewed or misaligned, and the marker pen 711 draws a closed circumference line, and the repeatedly rotated marking lines coincide, it is a normal production state. If roller 5 is parallel to the conveying surface but its axis is skewed and its coaxiality exceeds the tolerance, the marker pen 711 will draw multi-ring concentric line marks. The operator can judge the degree of misalignment by the spacing of the marks. If the roller 5 is not parallel to the conveying surface and its axis is skewed, the marker pen 711 will draw irregular trajectories such as waves and ellipses. Operators can judge the degree of skew and movement by the trajectory shape and take timely adjustment measures.

[0054] Meanwhile, the detection body 701 with different taper at both ends of the roller 5 is used to achieve coarse and fine dual-level monitoring: the small taper end quickly identifies large positional anomalies, and the large taper end accurately captures minor deviations. The operator compares the status of the markings at both ends to quickly locate the abnormal position and direction.

[0055] Colloidal state temperature control: To address the sensitivity of water-based coating adhesives to temperature and humidity, a water circulation system continuously supplies water at a specific temperature into roller 5. Roller 5 then transfers a stable temperature to the bonding surface between the decorative film and the substrate: In low-temperature environments, it reduces the viscosity of the adhesive and improves leveling properties, preventing uneven coating; in high-humidity environments, it accelerates the evaporation of moisture from the adhesive, preventing film surface fogging, whitening, and re-sticking, stabilizing the fluidity and wettability of the adhesive, eliminating problems such as sticking, delamination, and poor adhesion, and ensuring batch stability of the product.

[0056] Indirect early warning of roller deformation: The flow rate monitoring device 805 monitors the flow rate of the water circulation system in real time. If the roller 5 deforms due to stress, the first channel 801 and the second channel 802 inside will deform accordingly, causing the water flow to be obstructed. The flow rate monitoring device 805 will report a deviation from the standard value, and the controller electrically connected to it will issue a timely reminder. Operators can maintain or replace the roller 5 in advance to avoid the deformation from aggravating production.

[0057] III. Post-Production Maintenance Phase After production is completed, the surface of roller 5 is maintained using the cleaning structure of the second component, while a water circulation system is used to assist in cleaning. Specific steps are as follows: Maintaining the normal operation of the water circulation system continuously provides temperature support for the roller 5, softening the dry glue spots and impurities remaining on the surface of the roller 5, and reducing the difficulty of cleaning; The operator holds the handle 807 and uses the magnets on the inner wall to magnetically attach the two semi-circular shells 806 to the surface of the roller body 5. The semi-circular shells 806 are moved along the axial direction of the roller body 5, and the cleaning blades 808 on them directly scrape the hard impurities such as dry glue spots and bumps on the surface of the roller body 5. At the same time, the wiping cotton 809 assists in wiping the surface of the roller body 5 to thoroughly remove the residual substances. After cleaning, remove the semi-circular shell 806, shut off the water circulation system, and check the return of each component to its original position to prepare for the next production operation.

[0058] Throughout the entire process, the first and second components work together to ensure the stability of the core production process of bonding PVC decorative film to substrate, while also enabling real-time monitoring and convenient maintenance of the equipment. This effectively improves product qualification rate, reduces production losses, and meets the needs of continuous and automated production.

[0059] Please refer to the above work process. Figures 1 to 10 .

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surface coating machine for high-adhesion PVC decorative film, comprising: The coating machine (1) and the support (2) are characterized in that they further include: a roller body (5) and a first component; The roller (5) is mounted on the bracket (2). The first component includes a detection body (701) threaded to the end of the roller (5). A support platform (702) is fixedly connected to the inner side wall of the bracket (2). Guide rails (703) are symmetrically fixedly connected to the support platform (702). Insertion slots (704) are provided at equal intervals on the guide rails (703). Limiting pieces (705) are inserted into the insertion slots (704). A sliding block (706) is slidably connected to the guide rail (703), and a limiting member (707) is fixedly connected to the sliding block (706). A circular opening (708) is provided through the limiting member (707). A timer (709) is fixedly connected to the limiting member (707), and an electrically controlled telescopic rod (710) is fixedly connected to the limiting member (707). A marker pen (711) is provided at the telescopic end of the electrically controlled telescopic rod (710).

2. The surface coating machine for high adhesion PVC decorative film according to claim 1, characterized in that: It also includes a conveyor shaft (3), a transmission platform (4), and a shaft (6). The conveyor shaft (3) is rotatably connected to the bracket (2), the transmission platform (4) is set on the coating machine (1), and the shaft (6) is inserted and fixedly connected to the end of the roller (5). The plane where the roller (5) is located is higher than the plane where the conveying shaft (3) is located.

3. The surface coating machine for high adhesion PVC decorative film according to claim 2, characterized in that: It also includes a second component; The second component includes a first channel (801) and a second channel (802) opened in the roller body (5). A flow rate monitoring device (805) is fixedly connected to the side wall of the cover of the coating machine (1). A water pipe (803) is fixedly connected to one end of the flow rate monitoring device (805). A rotary joint (804) is sleeved on the end of the water pipe (803) away from the flow rate monitoring device (805). The end of the rotary joint (804) away from the water pipe (803) is inserted into the shaft (6).

4. The surface coating machine for high adhesion PVC decorative film according to claim 3, characterized in that: A semi-circular shell (806) is mounted on the roller body (5). A magnet is provided on the inner wall plane of the semi-circular shell (806). A handle (807) is fixedly connected to the outer arc surface of the semi-circular shell (806). A cleaning scraper (808) is fixedly connected to the inner arc surface of the semi-circular shell (806). A wiping cotton (809) is fixedly connected to the middle of the inner arc surface of the semi-circular shell (806).

5. The surface coating machine for high adhesion PVC decorative film according to claim 1, characterized in that: The detection body (701) is frustum-shaped; and the detection bodies (701) at both ends of the roller (5) have different taper settings.

6. The surface coating machine for high adhesion PVC decorative film according to claim 4, characterized in that: The flow rate monitoring device (805) is connected to water pipes at both ends. One end is a water pipe (803) connected to the rotary joint (804), and the other end is connected to an external water supply device. The water pipe (803), rotary joint (804), flow rate monitoring device (805) and the pipe body on it are symmetrically distributed in two sets with roller body (5) and hollow shaft (6), and together with the first channel (801), the second channel (802) and the external water supply device, they form a water circulation system.

7. A coating process for high-adhesion PVC decorative film, applied to a surface coating machine for high-adhesion PVC decorative film as described in any one of claims 1-6, characterized in that: Includes the following steps: Step 1: Equipment debugging and material preparation before operation Calibrate the monitoring components, adjust the matching position of the end detection body (701) and the marker pen (711) of the roller (5), set the working cycle of the electric telescopic rod (710), adjust the temperature control circulation system to form a closed water circuit, introduce constant temperature water to the flow rate monitoring device (805) to display the reference value, and confirm that the temperature transmission of the roller (5) is uniform. Calibrate the relative positions of the conveying components and adjust the transmission speed of each component to synchronization; Step 2: Substrate Pretreatment The surface of the pre-formed composite substrate is subjected to dust removal, corona treatment or plasma activation to improve the surface energy and micro-roughness of the PVC decorative film, providing a high-adhesion foundation for the subsequent coating layer; the treated substrate is smoothly fed into the coating station by guide rollers to ensure accurate coating position without deviation. The substrate is brought to the bonding station, ready for the synchronous lamination and rolling of the PVC decorative film and the substrate.

8. The coating process for the high-adhesion PVC decorative film according to claim 7, characterized in that: It also includes step three: synchronous lamination and rolling of the PVC decorative film and the substrate. Start the roller (5) drive system to drive the decorative film and the substrate to be transported at the same speed and accurately aligned and bonded at the bonding station; The film base is tightly bonded by roller (5) pressure rolling, and the pressure is controlled at 0.3-0.5MPa to ensure that the adhesive layer is spread without air bubbles. Keep the water circulation temperature control system working, and transmit a constant temperature of 25-35℃ to the bonding surface through the roller (5) to maintain the leveling of the adhesive layer; Step 4: Quality monitoring and dynamic control of the bonding process Observe the marking trajectory on the surface of the test object (701). If it is abnormal, stop the machine to correct its coaxiality and installation position. Restart the machine after it returns to normal. Adjust the water temperature of the water circulation system according to the ambient temperature and humidity, setting it to 30-40℃ in low temperatures and 35-40℃ in high humidity to optimize the state of the adhesive layer. The flow rate monitoring device (805) is monitored in real time. If the value deviates from the reference value, the machine is stopped for inspection, repair or replacement of the roller (5).

9. The coating process for the high-adhesion PVC decorative film according to claim 8, characterized in that: It also includes step five: post-bonding curing and finished product winding. The film-based composite is sent to the subsequent curing station via the transmission platform (4) and cured at room temperature and ventilation for 20-30 minutes to allow the adhesive layer to dry fully; The high-adhesion PVC decorative film composite substrate is cured and shaped to eliminate internal stress, and its dimensions and surface flatness are checked. Finally, the finished product is neatly wound up by a winding device to complete the surface coating process of the high-adhesion PVC decorative film. The winding tension is controlled at 5-8N, the film is wound flat, and it is marked according to specifications and batch. Step Six: Post-operation equipment cleaning and maintenance Keep the water circulation temperature control system working to maintain the roller body (5) at 30-35℃, softening the residual dry glue and impurities on the surface; The two semi-circular shells (806) are magnetically attached to the roller body (5), and the handle (807) is moved axially to remove surface residue through the cleaning scraper (808) and wiping cotton (809). After cleaning and maintenance, check the tightness of each component connection and add lubricant to the conveyor shaft (3) and roller (5).

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