Plastic-free coating material laminating machine

Abstract

The invention relates to a plastic-free coating material laminating machine, which belongs to the technical field of laminating machines, and comprises a machine shell, a composite rotating roller, a coating mechanism, a heat source control mechanism and a vertical-wind-free drying mechanism, the coating mechanism is arranged in the machine shell, and one end of the top of the coating mechanism is communicated with a feeding tank; the heat source tank is used for coating a plastic-free coating raw material in the feeding tank onto a base material passing through the composite rotating roller, the heat source control mechanism is fixed in the machine shell through a support, one end of the top of the heat source control mechanism is communicated with the heat source tank, and the vertical-wind-free drying mechanism is arranged in the machine shell and further communicated with the heat source tank through a pipeline. By means of the hot water circulation system, double-face collaborative and stepped drying of the base material is achieved, the heat energy utilization rate is high, and curing is uniform. The coating mechanism is integrated with an adjustable eccentric disc, salient point textures can be directly manufactured on a wet coating after film spraying, and the product function and the process flexibility are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of curtain coater, in particular to a plastic-free coating material curtain coater. BACKGROUND

[0002] The curtain coater is a kind of equipment widely used in packaging, printing and other fields, its main function is to uniformly coat a functional coating material such as waterproof and oil-proof coating on the surface of paper, film and other substrates, and then form a stable film layer through subsequent drying and curing. The traditional curtain coater usually includes a substrate unwinding and traction system, a supply system for storing and conveying coating material, and a coating mechanism for coating the material on the substrate surface. However, the plastic-free coating material is different from the conventional solid raw material in shape and has a higher moisture content, which makes it difficult to form. Therefore, the wet coating needs to be cured and dried in time after coating, and the drying step is a key link to ensure the performance and appearance quality of the coating. The energy consumption and effect directly affect the production efficiency and product quality.

[0003] In the prior art, the drying system of the curtain coater usually uses electric heating or gas heating air as the heat medium, and blows hot air vertically or obliquely to the coating surface through a fan to achieve drying. This conventional drying method has the following problems: on the one hand, the hot air is directly exhausted after heat exchange with the coating, and the heat energy is not recycled, resulting in low energy utilization efficiency and high operating cost; on the other hand, the vertical or concentrated hot air impact force may disturb the surface of the wet coating which has not yet solidified, resulting in poor coating flow flatness and defects such as ripples and orange peel, which affect the surface uniformity and smoothness. In addition, the existing equipment cannot realize synchronous and uniform heating of the formed surface and the non-formed surface of the substrate, which may cause large temperature difference between the two surfaces of the substrate, uneven heating, and thus curling, deformation or inconsistent curing of the coating. To solve the above problems, we propose a plastic-free coating material curtain coater. SUMMARY

[0004] To overcome the technical defects of the prior art, the present application provides a plastic-free coating material curtain coater, which has the technical effects of good drying effect and high energy utilization rate.

[0005] The technical scheme adopted by the present application is: including a shell, a composite roller, a coating mechanism, a heat source control mechanism and a vertical air-free drying mechanism, strip-shaped through grooves are formed on both sides of the shell, a base material is inserted from one side of the strip-shaped through groove, and is discharged from the other side of the strip-shaped through groove after being treated by film coating, a feeding tank for storing plastic-free coating material and a heat source tank for storing constant-temperature hot water are arranged on the top of the shell, the composite roller comprises a hollow heating cylinder fixed in the shell and a rotating roller rotatably clamped on the hollow heating cylinder, the base material passes through the rotating roller, the coating mechanism is arranged in the shell and is connected with the feeding tank at one end of the top of the coating mechanism, and is used for coating the plastic-free coating material in the feeding tank on the base material passing through the composite roller, the heat source control mechanism is fixed in the shell through a support, one end of the top of the heat source control mechanism is connected with the heat source tank, and is used for delivering the constant-temperature hot water to the inner cavity of the hollow heating cylinder and then to the vertical air-free drying mechanism, the vertical air-free drying mechanism is arranged in the shell and is located on one side of the discharge path of the base material after being treated by film coating, the drying mechanism is also connected with the heat source tank through a pipeline to form a water circulation path, and the vertical air-free drying mechanism forms a vertical air-free drying area on the forming surface of the base material, and the hollow heating cylinder forms a contact drying area on the non-forming surface of the base material.

[0006] Preferably, the coating mechanism comprises a coating head, upper pipes, a communication seat and a receiving pipe, the top of the coating head is connected with the communication seat through a plurality of upper pipes, the communication seat is connected with the feeding tank through the receiving pipe, the plastic-free coating material in the feeding tank enters the communication seat through the receiving pipe, and then enters each area of the coating head through the plurality of upper pipes, and then is discharged to the base material on the composite roller for film coating, in use, the plastic-free coating material in the feeding tank is evenly distributed to each area inside the coating head through the receiving pipe under the pumping action, and finally uniformly flows out from the gap or nozzle of the coating head and is coated on the surface of the base material passing below.

[0007] Preferably, the side surface of the coating head is provided with two fixed frames, a mounting rod is rotatably arranged between the two fixed frames, a plurality of eccentric discs are arranged on the mounting rod, a driving motor for driving the mounting rod to rotate is arranged on one side of the fixed frame, and the long axis end of the eccentric disc is tangent to the surface of the base material, so that the eccentric disc can push and press the film coating on the surface of the base material when rotating, and a convex point is formed, in use, when a specific texture (such as a convex point) needs to be manufactured on the coating surface, the driving motor can be started to control the rotation of the eccentric disc, and the eccentric disc periodically and gently pushes and presses the coating during the rotation of the eccentric disc, so that a regularly arranged convex point structure is formed on the coating, and the equipment can quickly and continuously increase the surface texture function on the basis of completing the plane coating.

[0008] Preferably, the eccentric disc is movably sleeved on the mounting rod, and a fastening screw is threaded onto the mounting rod. When the bottom of the fastening screw abuts against the mounting rod, the position of the eccentric disc can be fixed. In use, if it is necessary to adjust the size or distribution pattern of the protrusions, the fastening screw of the corresponding eccentric disc can be loosened first, so that the eccentric disc can slide axially or rotate circumferentially on the mounting rod to change its position relative to the coating head or substrate. After adjusting to the desired position, the fastening screw can be tightened again to fix it. This provides a high degree of process flexibility, allowing the texture parameters to be quickly adjusted according to different product requirements without replacing the entire coating or embossing component.

[0009] Preferably, the heat source control mechanism includes a distribution tank located in the middle of the composite roller and two collection tanks located at the front and rear ends of the hollow heating cylinder. One end of the distribution tank is connected to the heat source tank through a water inlet pipe. The outer periphery of the distribution tank is connected to the inner cavity of the hollow heating cylinder through several water distribution pipes. The hot water in the hollow heating cylinder is connected to the collection tank through a return water pipe. The collection tank is connected to the non-vertical air drying mechanism through a return pipe, forming a circulation path of heat source tank-distribution tank-hollow heating cylinder-collection tank-drying mechanism-heat source tank. The constant temperature hot water first enters the distribution tank located in the center of the composite roller from the heat source tank through the water inlet pipe. The distribution tank distributes the hot water evenly to the entire inner cavity of the hollow heating cylinder through several radially distributed water distribution pipes, ensuring uniform axial heating of the roller. After the hot water flows and releases heat in the hollow heating cylinder, the temperature drops slightly. Then, it is collected into the front and rear collection tanks through the return water pipes. The hot water in the collection tank is then led to the non-vertical air drying mechanism for waste heat utilization through the return pipe.

[0010] Preferably, the drying mechanism consists of several hollow heat sinks evenly distributed front to back and a common connecting pipe. The heat sinks are connected sequentially through the common connecting pipe. The inner cavity of the outermost heat sink is connected to the heat source tank through a pipe. Ventilation holes are provided in the heat sinks. A blower fan is installed inside the housing. The blower fan blows air towards the heat sinks and parallel to the substrate surface. In use, warm water flowing from the collection tank flows into the common connecting pipe network of the drying mechanism and circulates sequentially through the inner cavity of each hollow heat sink. At the same time, the blower fan starts and blows air towards the heat sink array. The airflow direction is designed to be parallel to the substrate surface. The air is heated when it flows through the heat sinks with ventilation holes, becoming a parallel and uniform hot air band that sweeps across the molded surface of the substrate to cure it. This method uses the residual heat of hot water to generate hot air, avoiding the physical impact of vertical wind on the wet coating and achieving gentle and uniform drying.

[0011] Preferably, a baffle plate is provided on the side wall of the heat sink facing the blower fan to block airflow from blowing onto the substrate. In use, the baffle plate directly faces the direction of the blower fan, effectively blocking the high-speed initial airflow and guiding it to the heat dissipation area of ​​the heat sink, forcing the air to pass through the heat sink to be heated and flow. This prevents cold air or insufficiently heated airflow from directly blowing onto the substrate coating, ensuring that only stable hot air that has undergone sufficient heat exchange with the heat sink participates in the drying process, thereby further guaranteeing the stability of the drying process and the coating quality.

[0012] Preferably, a control host is provided on the housing, and an observation window is installed on one side of the housing. During use, the operator can centrally set and adjust various process parameters such as coating speed, drying temperature, and pump flow rate through the human-machine interface of the control host, and monitor the equipment operation status.

[0013] Preferably, traction rollers are provided on both the upper and lower sides of the strip groove on the outer wall of the housing for guiding the substrate. During use, the substrate passes through the upper and lower traction rollers when entering and leaving the strip groove of the housing. These traction rollers ensure that the substrate enters the coating area with a flat and stable posture and a predetermined tension, and leaves the drying area in the same controlled state, preventing the substrate from deviating, wrinkling or loosening, thereby ensuring the continuity and stability of the coating process and the coating quality.

[0014] Preferably, the machine housing is provided with a first guide roller, a second guide roller and a third guide roller. After the substrate enters the machine housing, it passes through the first guide roller, the composite roller, the second guide roller and the third guide roller in sequence before being discharged. In use, the substrate first passes through the first guide roller to adjust the entry angle, then tightly wraps around the composite roller to receive coating and back heating, then is turned by the second guide roller and guided to the area below the non-vertical wind drying zone to receive front drying, and finally is turned by the third guide roller and sent out from the discharge side strip channel.

[0015] The beneficial effects of this invention are: 1. This invention establishes a complete hot water circulation path by setting up a heat source control mechanism and a non-vertical airflow drying mechanism, which are connected to a heat source tank storing constant-temperature hot water and a hollow heating cylinder of a composite roller. During use, hot water first flows through the hollow heating cylinder, forming a contact drying area on the non-formed surface of the substrate. Then, the hot water carrying residual heat is transported to the non-vertical airflow drying mechanism, forming a windless vertical drying area with parallel airflow on the formed surface of the substrate. This allows for gentle and uniform curing of the coating, effectively improving the comprehensive utilization rate of heat energy and reducing energy consumption. Furthermore, the synergistic effect of contact and non-vertical airflow drying ensures uniform heating of the coating on both sides of the substrate, effectively avoiding coating defects caused by uneven drying or airflow impact, and significantly improving product quality.

[0016] 2. The coating mechanism of the present invention, by setting a rotatable eccentric disk on the side of the coating head, allows the drive motor to be flexibly started as needed after the basic film coating is completed. The rotation of the eccentric disk regularly pushes the wet coating, thereby forming the required raised structure on the substrate surface. The position of the eccentric disk on the mounting rod is adjustable and fixed by fastening screws, so that parameters such as the size and distribution density of the raised dots can be easily adjusted according to product requirements. The process is highly flexible and can produce ordinary smooth surfaces and raised textured surfaces with anti-slip and friction-enhancing functions without replacing complex parts, thus expanding the application range of the equipment. Attached Figure Description

[0017] Figure 1 and Figure 2 This is a schematic diagram of the external structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is an internal cross-sectional view of the present invention; Figure 5 and Figure 6 This is a schematic diagram showing the connection of the composite roller, coating mechanism, heat source control mechanism, and non-vertical air drying mechanism in this invention. Figure 7 This is a schematic diagram of the specific structure of the dryer without a vertical airflow mechanism and a heat source control mechanism in this invention. Figure 8 This is a schematic diagram of the coating mechanism in this invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Machine casing; 2. Composite roller; 3. Coating mechanism; 301. Coating head; 302. Upper guide tube; 303. Connecting seat; 304. Receiving pipe; 305. Fixing frame; 306. Mounting rod; 307. Eccentric disc; 308. Fastening screw; 309. Drive motor; 4. Heat source control mechanism; 401. Diverter tank; 402. Water distribution pipe; 403. Return water pipe; 404. Aggregator tank; 405. Return pipe; 406. Receiving pipe; 5. Drying mechanism without vertical airflow; 501. Heat sink; 502. Ventilation hole; 503. Connecting pipe; 504. Baffle plate; 6. Blower fan; 7. Traction roller; 8. First guide roller; 9. Second guide roller; 10. Third guide roller; 11. Feed tank; 12. Heat source tank; 13. Control host; 14. Observation window; 15. Substrate. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-8As shown, this embodiment provides a plastic-free coating material coating machine, including a housing 1, a composite roller 2, a coating mechanism 3, a heat source control mechanism 4, and a non-vertical air drying mechanism 5. The housing 1 has strip-shaped grooves on both sides. The substrate 15 passes through one side of the strip-shaped groove, is coated, and then discharged through the other side of the strip-shaped groove. The top of the housing 1 has a feeding tank 11 for storing plastic-free coating materials and a heat source tank 12 for storing constant-temperature hot water. The composite roller 2 includes a hollow heating cylinder fixed inside the housing 1 and a roller rotatably engaged with the hollow heating cylinder. The substrate 15 passes around the roller. The coating mechanism 3 is located inside the housing 1, and one end of its top is connected to the feeding tank 11 for feeding the substrate 15. The plastic-free coating material in 1 is applied to the substrate 15 passing through the composite roller 2. The heat source control mechanism 4 is fixed in the machine housing 1 by a bracket. One end of the heat source control mechanism 4 is connected to the heat source tank 12 and is used to transport constant temperature hot water to the inner cavity of the hollow heating cylinder and then to the airless drying mechanism 5. The airless drying mechanism 5 is set in the machine housing 1 and is located on one side of the discharge path after the substrate 15 is coated. The drying mechanism is also connected to the heat source tank 12 through a pipe to form a water circulation channel. The airless drying mechanism 5 forms an airless drying area on the forming surface of the substrate 15, and the hollow heating cylinder forms a contact drying area on the non-forming surface of the substrate 15.

[0020] In use, the substrate 15 enters the housing 1 through the strip groove on one side and passes around the composite roller 2. The coating mechanism 3 evenly coats the non-plastic coating material onto the side of the substrate 15 facing the roller, i.e. the forming surface. At the same time, the constant temperature hot water in the heat source tank 12 is pumped into the hollow heating cylinder of the composite roller 2 through the heat source control mechanism 4 to heat the roller. Thus, the coating is initially heated and cured from the back side of the substrate 15, i.e. the non-forming surface, through contact conduction. Subsequently, the hot water flows into the non-vertical air drying mechanism 5, which provides a parallel and gentle hot airflow on the forming surface side of the substrate 15 to cure the forming surface of the coating. Finally, the substrate 15, which has completed the coating and double-sided co-drying, is discharged from the strip groove on the other side.

[0021] In the actual production line, the preceding process is connected to the unwinding machine, the corona treatment machine and the automatic web guiding system. The corona treatment machine modifies the surface of the substrate 15 to enhance the coating adhesion. The web guiding system ensures that the substrate 15 enters the equipment in a precise position. The subsequent process is connected to the cooling roller, the quality inspection system and the winding machine. The above equipment is mature existing technology and does not involve the main improved structure of this invention, so it will not be described in detail.

[0022] Specifically, such as Figure 8As shown, the coating mechanism 3 includes a coating head 301, an upper guide tube 302, a connecting seat 303, and a receiving tube 304. The top of the coating head 301 is connected to the connecting seat 303 through multiple upper guide tubes 302. The connecting seat 303 is connected to the feeding tank 11 through the receiving tube 304. The plastic-free coating material in the feeding tank 11 enters the connecting seat 303 through the receiving tube 304, and then enters various areas of the coating head 301 through multiple upper guide tubes 302. Then, it is discharged through the coating head 301 onto the substrate 15 on the composite roller 2 for coating. In use, the plastic-free coating material in the feeding tank 11, under the action of the pump body and the feeding tank 11 being an integral structure (not shown in the figure), flows into the connecting seat 303 through the receiving tube 304, and is then evenly distributed to various areas inside the coating head 301 through multiple upper guide tubes 302. Finally, it flows out evenly from the gaps or nozzles of the coating head 301 and is coated onto the surface of the substrate 15 passing below.

[0023] Two mounting brackets 305 are provided on the side of the coating head 301, and a mounting rod 306 is rotatably mounted between the two mounting brackets 305. Several eccentric discs 307 are provided on the mounting rod 306. A drive motor 309 for driving the mounting rod 306 to rotate is provided on one of the mounting brackets 305. The long shaft end of the eccentric disc 307 is tangent to the surface of the substrate 15, so that when the eccentric disc 307 rotates, it can push the coating film on the surface of the substrate 15 to form bumps. In use, when it is necessary to create a specific texture such as bumps on the coating surface... When the time is right, the drive motor 309 can be started. The drive motor 309 drives the mounting rod 306 and several eccentric disks 307 on it to rotate. Since the long shaft end of the eccentric disk 307 is designed to be tangent to the uncured wet coating surface on the substrate 15, during the rotation, the eccentric disk 307 periodically and gently pushes the coating, thereby forming a regularly arranged convex structure on the coating. This allows the equipment to quickly and continuously add surface texture function on the basis of completing planar coating, thereby improving the added value and anti-slip performance of the product.

[0024] The eccentric disc 307 is movably mounted on the mounting rod 306. A fastening screw 308 is threaded onto the mounting rod 306. When the bottom of the fastening screw 308 is pressed against the mounting rod 306, the position of the eccentric disc 307 can be fixed. In use, if it is necessary to adjust the size or distribution pattern of the protrusions, the fastening screw 308 of the corresponding eccentric disc 307 can be loosened first, so that the eccentric disc 307 can slide axially or rotate circumferentially on the mounting rod 306 to change its position relative to the coating head 301 or the substrate 15. After adjusting to the desired position, the fastening screw 308 can be tightened again to fix it. This provides a high degree of process flexibility, allowing the texture parameters to be quickly adjusted according to different product requirements without replacing the entire coating or embossing component.

[0025] Specifically, such as Figure 7As shown, the heat source control mechanism 4 includes a distribution tank 401 located in the middle of the composite roller 2 and two collection tanks 404 located at the front and rear ends of the hollow heating cylinder. One end of the distribution tank 401 is connected to the heat source tank 12 via a water inlet pipe 406. The outer periphery of the distribution tank 401 is connected to the inner cavity of the hollow heating cylinder via several water inlet pipes 402. The hot water in the hollow heating cylinder is connected to the collection tanks 404 via a return water pipe 403. The collection tanks 404 are connected to the non-vertical airflow drying mechanism 5 via a return pipe 405, forming a circulation path of heat source tank 12-distribution tank 401-hollow heating cylinder-collection tank 404-drying mechanism-heat source tank 12. In use, constant temperature hot water flows from the heat source tank 12 to the heat source tank 12. The hot water from the source tank 12 first enters the distribution tank 401 located at the center of the composite roller 2 via the water inlet pipe 406. The distribution tank 401 distributes the hot water evenly to the entire inner cavity of the hollow heating cylinder through several radially distributed water outlet pipes 402, ensuring uniform axial heating of the roller. After the hot water flows and releases heat in the hollow heating cylinder, the temperature drops slightly. Then, it is collected into the front and rear collection tanks 404 through the return water pipe 403. The hot water in the collection tanks 404 is then led to the non-vertical air drying mechanism 5 for waste heat utilization through the return pipe 405. This pathway design realizes the orderly distribution, uniform heat dissipation and recovery of hot water, forming an efficient and controllable closed-loop heating system.

[0026] The drying mechanism consists of several hollow heat sinks 501 evenly distributed front and back and a common connecting pipe 503. The heat sinks 501 are connected sequentially by the common connecting pipe 503. The inner cavity of the outermost heat sink 501 is connected to the heat source tank 12 through a pipe. Ventilation holes 502 are opened in the heat sinks 501. A blower fan 6 is installed inside the casing 1. The blower fan 6 blows air towards the heat sinks 501 and is parallel to the surface of the substrate 15. During use, warm water flowing from the collection tank 404 flows into the common connecting pipe of the drying mechanism. The airflow passes through the 503 network and circulates sequentially through the internal cavities of each hollow heat sink 501. Simultaneously, the blower fan 6 starts, blowing air towards the heat sink 501 array. The airflow direction is designed to be parallel to the surface of the substrate 15. The air is heated as it flows through the heat sink 501 with ventilation holes 502, turning into a parallel and uniform hot air band that sweeps across the molding surface of the substrate 15 to cure it. This method utilizes the residual heat of hot water to generate hot air, avoiding the physical impact of vertical airflow on the wet coating and achieving gentle and uniform drying.

[0027] A baffle plate 504 is provided on the side wall of the heat sink 501 facing the blower fan 6 to block airflow from blowing onto the substrate 15. In use, the baffle plate 504 directly faces the direction of the blower fan 6, effectively blocking the high-speed original airflow and guiding it to the heat dissipation area of ​​the heat sink 501, forcing the air to pass through the heat sink 501 to be heated and flow. This avoids cold air or insufficiently heated airflow from blowing directly onto the coating of the substrate 15, ensuring that only stable hot air that has been fully heat-exchanged by the heat sink 501 participates in the drying process, thereby further ensuring the stability of the drying process and the coating quality.

[0028] Specifically, such as Figure 1 and Figure 2 As shown, a control host 13 is installed on the housing 1, and an observation window 14 is installed on one side of the housing 1. During use, the operator can centrally set and adjust various process parameters such as coating speed, drying temperature, and pump flow rate through the human-machine interface of the control host 13, and monitor the equipment operation status. At the same time, through the observation window 14, the movement, coating, and drying of the substrate 15 inside the housing 1 can be viewed in real time and intuitively, which is convenient for timely detection and handling of abnormalities, ensuring the reliability and controllability of the production process. Traction rollers 7 are installed on both the upper and lower sides of the strip groove on the outer wall of the housing 1 for traction and guidance of the substrate 15. During use, the substrate 15 passes through the upper and lower traction rollers 7 when entering and leaving the strip groove of the housing 1. These traction rollers 7 ensure that the substrate 15 enters the coating area with a flat and stable posture and a predetermined tension, and leaves the drying area in the same controlled state, preventing the substrate 15 from deviating, wrinkling, or loosening, thereby ensuring the continuity and stability of the coating process and the coating quality.

[0029] Specifically, such as Figure 4 As shown, the machine housing 1 is equipped with a first guide roller 8, a second guide roller 9, and a third guide roller 10. After the substrate 15 enters the machine housing 1, it passes through the first guide roller 8, the composite roller 2, the second guide roller 9, and the third guide roller 10 in sequence before being discharged. In use, the substrate 15 first passes through the first guide roller 8 to adjust the entry angle, then tightly wraps around the composite roller 2 to receive coating and back heating, then is turned by the second guide roller 9 and guided to the area below the non-vertical air drying zone to receive front drying, and finally is turned by the third guide roller 10 and sent out from the discharge side strip groove. The guide rollers work together to determine the precise relative position and contact relationship between the substrate 15 and each functional component, the coating head 301, the heating roller, and the drying mechanism.

[0030] The foregoing has shown and described the basic principles, main features and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from the spirit and scope of this invention. All such changes and modifications fall within the scope of this invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A coating machine for plastic-free coating materials, characterized in that, include: The casing (1) has strip-shaped channels on both sides. The substrate (15) is inserted through one side of the strip-shaped channel and discharged through the other side of the strip-shaped channel after being coated. The top of the casing (1) is provided with a feeding tank (11) for storing non-plastic coating material and a heat source tank (12) for storing constant temperature hot water. The composite roller (2) includes a hollow heating cylinder fixed inside the housing (1) and a roller that is rotatably engaged with the hollow heating cylinder, and the substrate (15) is wrapped around the roller; The coating mechanism (3) is located inside the housing (1) and one end of its top is connected to the feed tank (11). It is used to coat the plastic-free coating material in the feed tank (11) onto the substrate (15) that passes through the composite roller (2). The heat source control mechanism (4) and the airless drying mechanism (5) are fixed inside the housing (1) by a bracket. The top end of the heat source control mechanism (4) is connected to the heat source tank (12) to transport constant temperature hot water to the inner cavity of the hollow heating cylinder and then to the airless drying mechanism (5). The airless drying mechanism (5) is set inside the housing (1) and located on one side of the discharge path after the substrate (15) is coated. The drying mechanism is also connected to the heat source tank (12) through a pipe to form a water circulation path. The airless drying mechanism (5) forms an airless drying area on the forming surface of the substrate (15), and the hollow heating cylinder forms a contact drying area on the non-forming surface of the substrate (15).

2. The non-plastic coating material coating machine according to claim 1, characterized in that: The coating mechanism (3) includes a coating head (301), an upper guide tube (302), a connecting seat (303), and a receiving tube (304). The top of the coating head (301) is connected to the connecting seat (303) through multiple upper guide tubes (302). The connecting seat (303) is connected to the feeding tank (11) through the receiving tube (304). The plastic-free coating material in the feeding tank (11) enters the connecting seat (303) through the receiving tube (304), and then enters each area of ​​the coating head (301) through multiple upper guide tubes (302). Then it is discharged through the coating head (301) to the substrate (15) on the composite roller (2) for coating.

3. The non-plastic coating material coating machine according to claim 2, characterized in that: The coating head (301) has two fixed frames (305) on its side, and an mounting rod (306) is rotatably arranged between the two fixed frames (305). The mounting rod (306) is provided with several eccentric discs (307). One of the fixed frames (305) is provided with a drive motor (309) for driving the mounting rod (306) to rotate. The end of the long shaft of the eccentric disc (307) is tangent to the surface of the substrate (15), so that when the eccentric disc (307) rotates, it can push the coating film on the surface of the substrate (15) to form protrusions.

4. The non-plastic coating material coating machine according to claim 3, characterized in that: The eccentric disc (307) is movably sleeved on the mounting rod (306), and a fastening screw (308) is threaded on the mounting rod (306). When the bottom of the fastening screw (308) abuts against the mounting rod (306), the position of the eccentric disc (307) can be fixed.

5. The non-plastic coating material coating machine according to claim 1, characterized in that: The heat source control mechanism (4) includes a diversion tank (401) located in the middle of the composite roller (2) and two collection tanks (404) located at the front and rear ends of the hollow heating cylinder. One end of the diversion tank (401) is connected to the heat source tank (12) through a water inlet pipe (406). The outer periphery of the diversion tank (401) is connected to the inner cavity of the hollow heating cylinder through several water outlet pipes (402). The hot water in the hollow heating cylinder is connected to the collection tank (404) through a return water pipe (403). The collection tank (404) is connected to the non-vertical air drying mechanism (5) through a return pipe (405), forming a circulation path of heat source tank (12) - diversion tank (401) - hollow heating cylinder - collection tank (404) - drying mechanism - heat source tank (12).

6. The non-plastic coating material coating machine according to claim 1, characterized in that: The drying mechanism consists of several hollow heat sinks (501) evenly distributed front and back and a common pipe (503). Each heat sink (501) is connected to the others in sequence through the common pipe (503). The inner cavity of the outermost heat sink (501) is connected to the heat source tank (12) through a pipe. Ventilation holes (502) are provided in the heat sink (501). A blower fan (6) is installed inside the housing (1). The blower fan (6) blows air towards the heat sink (501) and is parallel to the surface of the substrate (15).

7. The non-plastic coating material coating machine according to claim 6, characterized in that: A baffle plate (504) is provided on the side wall of the heat sink (501) facing the blower (6) to block the airflow from blowing onto the substrate (15).

8. The non-plastic coating material coating machine according to claim 1, characterized in that: The housing (1) is equipped with a control host (13), and an observation window (14) is installed on one side of the housing (1).

9. The non-plastic coating material coating machine according to claim 1, characterized in that: The outer wall of the housing (1) is provided with traction rollers (7) at the upper and lower sides of the strip groove for traction and guidance of the substrate (15).

10. The non-plastic coating material coating machine according to claim 1, characterized in that: The housing (1) is provided with a first guide roller (8), a second guide roller (9) and a third guide roller (10). After the substrate (15) enters the housing (1), it passes through the first guide roller (8), the composite roller (2), the second guide roller (9) and the third guide roller (10) in sequence before being discharged.

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