Coating system based on double-sided coating

Abstract

The utility model belongs to the technical field of coating devices, and particularly relates to a coating system based on double-sided coating, which comprises an unfolding roller and a winding roller, and the unfolding roller is used for unfolding a base material needing double-sided coating; the winding roller is used for rewinding the coated base material, and a plurality of guide rollers are arranged between the winding roller and the unfolding roller; the coating mechanism, the drying oven mechanism and the preheating mechanism are mounted on the rear side of the unfolding roller and are used for carrying out double-sided coating on a base material; the drying oven mechanism is mounted between the coating mechanism and the winding roller and is used for drying and curing the base material after double-sided coating; the preheating mechanism is mounted on the rear side of the coating mechanism and is used for preheating a coating layer on the base material; the preheating mechanism is arranged on the rear side of the coating mechanism to preheat the coating layer on the base material, so that the condition that the coating layer is adhered to the guide roller before entering the drying oven mechanism is effectively reduced, the double-sided coating quality is ensured, and the product quality is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of coating device technology, and in particular relates to a coating system based on double-sided coating. Background Technology

[0002] The coating process involves uniformly applying a coating liquid to the surface of a substrate and then drying and curing it in an oven to form a surface layer with specific functions, thereby improving the performance of the substrate. Sometimes, some substrates require coating on both sides. However, traditional coating machines usually only coat one side at a time, which is inefficient. Some other methods, such as the double-coating mechanism disclosed in Chinese patent application number (2022205766924), improve coating efficiency by coating both sides of the substrate simultaneously. However, it does not preheat after simultaneous coating, which can easily cause adhesion when in contact with the conveyor roller, thereby damaging the coating layer and affecting product quality. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned technical problems by providing a coating system based on double-sided coating, which achieves the effect of preheating the coating layer after coating and reducing adhesion between the coating and the conveyor rollers before entering the oven.

[0004] In view of this, the present invention provides a coating system based on double-sided coating, comprising:

[0005] Uncoiling rollers are used to unfold substrates that require double-sided coating.

[0006] The take-up roller is used to rewind the coated substrate and has multiple guide rollers between it and the unfolding roller.

[0007] The coating mechanism is installed behind the spreading roller and is used to coat the substrate on both sides.

[0008] The drying oven mechanism is installed between the coating mechanism and the take-up roller, and is used for drying and curing the substrate after double-sided coating;

[0009] The preheating mechanism is installed behind the coating mechanism and is used to preheat the coating layer on the substrate.

[0010] Furthermore, the above technical solution also includes:

[0011] A conveying pipe is connected between the oven mechanism and the preheating mechanism, and is used to introduce hot air from the oven mechanism into the preheating mechanism;

[0012] An induced draft fan is installed inside the conveying pipeline and is used for hot air conveying between the oven mechanism and the preheating mechanism;

[0013] The conveying pipe is connected to the end of the oven mechanism located in the direction of substrate movement.

[0014] In the above technical solution, the coating mechanism further includes:

[0015] There are two coating rollers, one on each side of the substrate.

[0016] There are two liquid supply assemblies, each installed below one of the two coating rollers, and they are used to supply coating liquid to the coating rollers.

[0017] The substrate passes through two coating rollers from bottom to top, and the preheating mechanism is arranged vertically with the coating mechanism, with the preheating mechanism located above the coating mechanism.

[0018] In the above technical solution, the liquid supply component further includes:

[0019] The housing is installed below the coating roller and forms a paint trough inside;

[0020] A pumping assembly, mounted on the side of the housing, is used to spray the coating liquid inside the housing onto the coating roller.

[0021] In the above technical solution, the pumping component further includes:

[0022] A miniature pump is installed on the side of the housing and has an inlet pipe that connects to the paint tank;

[0023] The outlet tube includes a main tube connected to the micro pump and a distribution tube extending to the top of the housing;

[0024] A flat dispensing nozzle is mounted on the housing, and multiple sub-tubes are provided at equal intervals between it and the dispensing tube;

[0025] The housing has slots located above the coating roller and connected to a flat liquid outlet.

[0026] In the above technical solution, the coating mechanism further includes:

[0027] The scraper is installed inside the housing and located below the coating roller, forming a gap between it and the coating roller.

[0028] In the above technical solution, the coating mechanism further includes:

[0029] A reflux assembly, installed inside the housing, is used to return excess coating liquid to the paint tank inside the housing.

[0030] In the above technical solution, the recirculation component further includes:

[0031] An inclined plate, one end of which is connected to the shell, and the other end extends toward the substrate;

[0032] The return roller is installed at one end of the inclined plate near the substrate and is in rolling contact with the substrate;

[0033] The scraper block is installed between the inclined plate and the return roller, and is used to scrape the coating liquid off the return roller and guide it through the inclined plate into the coating tank of the housing.

[0034] The beneficial effects of this utility model are as follows:

[0035] 1. By setting a preheating mechanism on the rear side of the coating mechanism, the coating layer on the substrate is preheated, which effectively reduces the adhesion between the substrate and the guide roller before entering the drying oven mechanism, ensuring the quality of double-sided coating and product quality.

[0036] 2. By setting up a conveying pipeline and using an induced draft fan to guide the hot air used for drying and curing the coating layer in the oven mechanism into the preheating mechanism, the utilization rate of heat energy is effectively improved, achieving the effect of energy saving.

[0037] 3. By moving the substrate from bottom to top and placing the preheating mechanism above the coating mechanism, it is convenient to coat the substrate on both sides simultaneously. On the other hand, preheating the substrate before it contacts the guide roller after coating effectively reduces the possibility of adhesion and improves coating quality. Furthermore, based on the substrate moving from bottom to top, the pumping component facilitates the delivery of the coating liquid to a higher position and sprays it onto the coating roller, ensuring the coating quality of the coating roller on the base surface.

[0038] 4. The reflux assembly facilitates the return of excess coating liquid from the coating roller to the coating tank. Specifically, the reflux roller rotates with the movement of the substrate, ensuring that even coating liquid close to the substrate can follow the rotation of the reflux roller and flow into the coating tank after being scraped by the scraper block. This effectively ensures the recovery of excess coating liquid, avoiding waste and environmental impact. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of this utility model;

[0040] Figure 2 This is an internal schematic diagram of the present invention;

[0041] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle;

[0042] The markings in the diagram represent: 1. Unwinding roller; 2. Rewinding roller; 3. Guide roller; 4. Coating mechanism; 40. Coating roller; 41. Liquid supply assembly; 410. Housing; 411. Coating tank; 412. Micro pump; 413. Inlet pipe; 414. Outlet pipe; 4140. Main pipe; 4141. Distributor pipe; 415. Flat outlet nozzle; 416. Sub-pipe; 417. Groove; 42. Scraper; 43. Return assembly; 430. Inclined plate; 431. Return roller; 432. Scraper block; 5. Oven mechanism; 6. Preheating mechanism; 7. Conveying pipeline. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0044] Example 1:

[0045] This embodiment provides a coating system based on double-sided coating, including:

[0046] Unfolding roller 1 is used to unfold the substrate that needs to be coated on both sides;

[0047] The take-up roller 2 is used to rewind the coated substrate, and multiple guide rollers 3 are provided between it and the unfolding roller 1;

[0048] The coating mechanism 4 is installed on the rear side of the spreading roller 1 and is used to coat the substrate on both sides.

[0049] The drying oven mechanism 5 is installed between the coating mechanism 4 and the take-up roller 2, and is used for drying and curing the substrate after double-sided coating.

[0050] The preheating mechanism 6 is installed on the rear side of the coating mechanism 4 and is used for preheating the coating layer on the substrate;

[0051] The preheating mechanism 6 and the oven mechanism 5 have the same structure, with the only difference being their arrangement and specific dimensions. The specific structure of the oven mechanism 5 is a mature existing technology, which will not be described in detail here.

[0052] In addition, the coating system also includes necessary mechanisms such as motors and tension regulators (not shown in the accompanying drawings), which are known to those skilled in the art and will not be described in detail here.

[0053] As can be seen from this embodiment, by setting a preheating mechanism 6 on the rear side of the coating mechanism 4 to preheat the coating layer on the substrate, the adhesion between the coating layer and the guide roller 3 before entering the oven mechanism 5 is effectively reduced, ensuring the quality of double-sided coating and product quality.

[0054] Example 2:

[0055] This embodiment provides a coating system based on double-sided coating. In addition to the technical solutions of the above embodiments, it also has the following technical features, and further includes:

[0056] The conveying pipe 7 is connected between the oven mechanism 5 and the preheating mechanism 6, and is used to introduce the hot air from the oven mechanism 5 into the preheating mechanism 6.

[0057] An induced draft fan is installed inside the conveying pipe 7 and is used for hot air conveying between the oven mechanism 5 and the preheating mechanism 6;

[0058] The conveying pipe 7 is connected to the end of the oven mechanism 5 located in the direction of substrate movement;

[0059] Meanwhile, the specific structure of the induced draft fan is based on existing mature technology, and will not be elaborated here.

[0060] As can be seen from this embodiment, by setting up the conveying pipe 7 and using an induced draft fan to guide the hot air used for drying and curing the coating layer in the oven mechanism 5 into the preheating mechanism 6, the utilization rate of heat energy is effectively improved, and energy saving is achieved.

[0061] Example 3:

[0062] This embodiment provides a coating system based on double-sided coating. In addition to the technical solutions of the above embodiments, it also has the following technical features: the coating mechanism 4 includes:

[0063] There are two coating rollers 40, one on each side of the substrate.

[0064] There are two liquid supply assemblies 41, which are respectively installed below the two coating rollers 40 and are used to supply coating liquid to the coating rollers 40.

[0065] The substrate passes through two coating rollers 40 from bottom to top, and the preheating mechanism 6 is arranged vertically with the coating mechanism 4, with the preheating mechanism 6 located above the coating mechanism 4.

[0066] As can be seen from this embodiment, by moving the substrate from bottom to top and placing the preheating mechanism 6 above the coating mechanism 4, it is convenient to coat the substrate on both sides simultaneously. On the other hand, by preheating the substrate before it contacts the guide roller 3 after coating, the possibility of adhesion is effectively reduced and the coating quality is improved.

[0067] Example 4:

[0068] This embodiment provides a coating system based on double-sided coating. In addition to the technical solutions of the above embodiments, it also has the following technical features: the liquid supply component 41 includes:

[0069] The housing 410 is installed below the coating roller 40 and forms a paint trough 411 inside;

[0070] A pumping assembly is mounted on the side of housing 410 and is used to spray the coating liquid inside housing 410 onto coating roller 40.

[0071] As can be seen from this embodiment, based on the substrate moving from bottom to top, the coating liquid is easily transported to a higher position by the pumping component and sprayed onto the coating roller 40, ensuring the coating quality of the coating roller 40 on the substrate surface.

[0072] Example 5:

[0073] This embodiment provides a coating system based on double-sided coating. In addition to the technical solutions of the above embodiments, it also has the following technical features, including a pumping component:

[0074] A micro pump 412 is installed on the side of the housing 410 and is provided with an inlet pipe 413 that connects to the paint tank 411;

[0075] The outlet pipe 414 includes a main pipe 4140 connected to the micro pump 412 and a distribution pipe 4141 extending to the top of the housing 410;

[0076] A flat liquid outlet 415 is installed on the housing 410, and multiple sub-tubes 416 are provided at equal intervals between it and the liquid distribution tube 4141.

[0077] The housing 410 has a slot, which is located above the coating roller 40 and is connected to the flat liquid outlet 415.

[0078] Meanwhile, the micro pump 412 can be a micro diaphragm pump, which can be installed on the side of the housing 410 or placed in the paint tank 411. It can be adjusted according to actual needs. The specific structure of the micro diaphragm pump is a mature existing technology, which will not be described in detail here.

[0079] As can be seen from this embodiment, by using a micro pump 412 to draw coating liquid from the coating tank 411 and transport it above the coating roller 40, and by using multiple sub-pipes 416 to evenly distribute the coating liquid in the distribution pipe 4141, and then spraying it onto the surface of the coating roller 40 through the flat outlet nozzle 415, the uniformity of the coating liquid distribution on the surface of the coating roller 40 is effectively ensured, and the even distribution efficiency is high. It can quickly and evenly distribute the coating liquid in a single main pipe 4140 into the flat outlet nozzle 415, thereby evenly spraying it onto the surface of the coating roller 40.

[0080] Example 6:

[0081] This embodiment provides a coating system based on double-sided coating. In addition to the technical solutions of the above embodiments, it also has the following technical features. The coating mechanism 4 further includes:

[0082] The scraper 42 is installed inside the housing 410 and located below the coating roller 40, forming a gap between it and the coating roller 40.

[0083] As can be seen from this embodiment, by setting the scraper 42, the amount of coating liquid on the surface of the coating roller 40 can be effectively guaranteed, thereby effectively guaranteeing the coating quality on both sides of the substrate and ensuring the quality of the coating layer.

[0084] Example 7:

[0085] This embodiment provides a coating system based on double-sided coating. In addition to the technical solutions of the above embodiments, it also has the following technical features. The coating mechanism 4 further includes:

[0086] The return assembly 43 is installed inside the housing 410 and is used to return excess coating liquid to the coating tank 411 of the housing 410.

[0087] As can be seen from this embodiment, the return component 43 facilitates the return of excess coating liquid from the coating roller 40 to the coating tank, preventing excess coating liquid from flowing out of the coating tank, causing waste and impacting the production environment.

[0088] Example 8:

[0089] This embodiment provides a coating system based on double-sided coating. In addition to the technical solutions of the above embodiments, it also has the following technical features: the reflow component 43 includes:

[0090] Inclined plate 430, one end of which is connected to housing 410, and the other end extends toward the substrate side;

[0091] The return roller 431 is installed at one end of the inclined plate 430 near the substrate and is in rolling connection with the substrate;

[0092] The scraper block 432 is installed between the inclined plate 430 and the return roller 431, and is used to scrape the coating liquid on the return roller 431 and guide it through the inclined plate 430 into the coating tank 411 of the housing 410.

[0093] As can be seen from this embodiment, by using the return roller 431, the return roller 431 rotates with the movement of the substrate. Even the coating liquid close to the substrate can follow the rotation of the return roller 431 and flow into the coating tank after being scraped by the scraper block 432. This effectively ensures the recycling of excess coating liquid, avoids waste and environmental impact.

[0094] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A coating system based on double-sided coating, characterized in that, include: Unfolding roller (1), used to unfold the substrate that needs to be coated on both sides; The take-up roller (2) is used to rewind the coated substrate and is provided with multiple guide rollers (3) between it and the unfolding roller (1); The coating mechanism (4) is installed on the rear side of the spreading roller (1) and is used to coat the substrate on both sides. The drying oven mechanism (5) is installed between the coating mechanism (4) and the take-up roller (2) and is used for drying and curing the substrate after double-sided coating. The preheating mechanism (6) is installed on the rear side of the coating mechanism (4) and is used for preheating the coating layer on the substrate.

2. The coating system based on double-sided coating according to claim 1, characterized in that, Also includes: The conveying pipe (7) is connected between the oven mechanism (5) and the preheating mechanism (6) and is used to introduce the hot air from the oven mechanism (5) into the preheating mechanism (6); An induced draft fan is installed inside the conveying pipe (7) and is used for hot air conveying between the oven mechanism (5) and the preheating mechanism (6); The conveying pipe (7) is connected to the end of the oven mechanism (5) in the direction of substrate movement.

3. The coating system based on double-sided coating according to claim 1, characterized in that, The coating mechanism (4) includes: Two coating rollers (40) are provided, and they are located on both sides of the substrate respectively; Two liquid supply assemblies (41) are provided and are respectively installed below the two coating rollers (40) and are used to supply coating liquid to the coating rollers (40); The substrate passes through two coating rollers (40) from bottom to top, and the preheating mechanism (6) and the coating mechanism (4) are arranged vertically, with the preheating mechanism (6) located above the coating mechanism (4).

4. The coating system based on double-sided coating according to claim 3, characterized in that, The liquid supply assembly (41) includes: The housing (410) is installed below the coating roller (40) and forms a paint trough (411) inside; A pumping assembly is mounted on the side of the housing (410) and is used to spray the coating liquid inside the housing (410) onto the coating roller (40).

5. The coating system based on double-sided coating according to claim 4, characterized in that, The pumping assembly includes: A micro pump (412) is installed on the side of the housing (410) and is provided with an inlet pipe (413) that is connected to the paint tank (411); The outlet pipe (414) includes a main pipe (4140) connected to the micro pump (412) and a distribution pipe (4141) extending to the top of the housing (410); A flat liquid outlet (415) is installed on the housing (410) and has multiple sub-tubes (416) arranged at equal intervals between it and the liquid distribution tube (4141); The housing (410) has a slot (417) located above the coating roller (40) and connected to the flat liquid outlet (415).

6. The coating system based on double-sided coating according to claim 4, characterized in that, The coating mechanism (4) also includes: The scraper (42) is installed inside the housing (410) and located below the coating roller (40), forming a gap between it and the coating roller (40).

7. The coating system based on double-sided coating according to claim 4, characterized in that, The coating mechanism (4) also includes: A return assembly (43) is installed inside the housing (410) and is used to return excess coating liquid to the coating tank (411) of the housing (410).

8. The coating system based on double-sided coating according to claim 7, characterized in that, The recirculation component (43) includes: An inclined plate (430) is connected at one end to the housing (410) and at the other end extends toward the substrate side; A return roller (431) is installed on one end of the inclined plate (430) near the substrate and is in rolling contact with the substrate; A scraper block (432) is installed between the inclined plate (430) and the return roller (431) and is used to scrape the coating liquid off the return roller (431) and guide it through the inclined plate (430) into the coating tank (411) of the housing (410).

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