WO2023109011A1

WO2023109011A1 - Coating system and coating production line

Info

Publication number: WO2023109011A1
Application number: PCT/CN2022/094494
Authority: WO
Inventors: 周高阳; 刘国春; 李学法; 张国平
Original assignee: 江阴纳力新材料科技有限公司
Priority date: 2021-12-16
Filing date: 2022-05-23
Publication date: 2023-06-22
Also published as: CN114318308A

Abstract

The present invention relates to a coating system and a coating production line. The coating system comprises: an unwinding apparatus capable of accommodating and conveying at a constant speed a thin film; a coating pool disposed at an output side of the unwinding apparatus and used to store coating liquid, so as to carry out coating on the thin film conveyed by the unwinding device; a spraying apparatus capable of cleaning the thin film coated by the coating pool; a drying apparatus used to dry the thin film cleaned by the spraying apparatus; and a winding apparatus disposed at an output side of the drying apparatus and capable of conveying at a constant speed and accommodating the thin film processed by the drying apparatus. When a thin film needs to be coated, the thin film is moved out from the unwinding apparatus and is accommodated in the unwinding apparatus. It can be understood that the thin film is pre-leveled by the unwinding apparatus and the winding apparatus. When the thin film passes through the coating pool at a constant speed, the coating liquid of the coating pool can be uniformly attached to the thin film, so that the thickness of the coating layer of the thin film is increased. By means of controlling the speed at which the thin film is conveyed by the unwinding apparatus, the thickness of a coating layer on thin film can be increased.

Description

Coating system and coating production line

technical field

The invention relates to the technical field of material processing, in particular to a coating system and a coating production line.

Background technique

When coating the thin film, it is pre-treated by magnetron, evaporation and other types of processing techniques. The thickness of the metal film surface of the film processed by magnetron and evaporation processes is insufficient or uneven, and the film surface resistance of the film is about 2000 milliohms. The film surface resistance of the film is too high. The thickness of the coating layer is increased so that the surface resistance of the film is lower than 500 milliohms.

In order to increase the thickness of the coating layer of the film, the existing solution uses electroplating. During the electroplating process, if the electric current is set to the current limited during the electroplating process, the thickness of the coating layer of the film still cannot reach the required thickness range. However, when the thickness of the coating layer of the film is increased by increasing the current during electroplating, problems such as burning holes, perforation or film breakage will occur in the film, which affects the pass rate of film processing.

Contents of the invention

Based on this, it is necessary to propose a coating system to solve the problems of burning holes, perforation or film breakage in the existing solutions of increasing the thickness of the thin film coating layer by means of electroplating. Furthermore, a coating production line comprising the coating system is also proposed.

A kind of coating system, described coating system comprises:

Unwinding device, capable of receiving and conveying film;

A coating pool is used to accommodate the coating solution for the coating treatment of the film conveyed by the unwinding device;

a spraying device capable of cleaning the film coated by the coating pool;

a drying device, used for drying the film after cleaning the spraying device;

The winding device is capable of conveying and storing the film processed by the drying device.

In the above coating system, when the film needs to be coated, the film is moved out from the unwinding device and stored in the unwinding device. It can be understood that the film is pre-stretched by the unwinding device and the winding device. When the film passes through the coating tank at a constant speed, the coating solution in the coating tank can evenly adhere to the film, thereby increasing the thickness of the coating layer of the film. By controlling the speed at which the unwinding device conveys the film, the thickness of the coating layer on the film can be increased differently. When the thickness of the film layer is thicker, the speed at which the film moves is lower. After the coating layer on the film increases in thickness, it is cleaned by the spraying device, dried by the drying device, and finally stored in the winding device. This solution can better avoid problems such as burning holes, perforation or film breakage in the thin film that exists when the thickness of the coating layer is increased by increasing the current in electroplating.

In one embodiment, the unwinding device includes a winding reel, and the reel can rotate around its own axis, so that the film is wound on the reel.

In one of the embodiments, the unwinding device further includes multiple sets of rollers arranged at intervals, and the rollers are used for conveying the film.

In one of the embodiments, the unwinding device further includes a pressing mechanism, the pressing mechanism is rotatably arranged on the unwinding device, the pressing mechanism includes a touch head, and the touch pressure A head is used to press against the film on the reel.

In one of the embodiments, the unwinding device is provided with a mobile module and a distance measuring module capable of communicating with each other, the distance measuring module is used to measure the thickness of the film on the reel, and the mobile module uses and driving the unwinding device to move on a horizontal plane in a direction perpendicular to the conveying direction of the film.

In one of the embodiments, the side of the coating pool close to the unwinding device is provided with a detection channel through which the film can pass, the detection channel communicates with the coating pool, and the detection channel is provided with multiple An image processing module is used to detect the surface quality of the film, and the image processing module can communicate with the unwinding device.

In one of the embodiments, the spraying device is connected with a sewage treatment pipeline for recycling waste liquid used by the spraying device.

In one of the embodiments, the drying device includes a drying module and an air duct module, and the air duct module is used to evenly blow the heat of the drying module to the film.

In one embodiment, the drying device further includes a first sensor, the first sensor is used to detect the temperature generated by the drying module, and the first sensor is electrically connected to the drying module.

A coating production line, including the coating system.

Description of drawings

Fig. 1 is the module schematic diagram of the coating system in an embodiment of the present invention;

Fig. 2 is a schematic structural view of a coating system in an embodiment of the present invention;

Fig. 3 is a schematic structural view of an unwinding device in an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a drying device in an embodiment of the present invention.

Explanation of reference numbers:

100. Unwinding device; 110. Coil tray; 120. Roller; 130. Pressing mechanism;

131. Touching the pressure head; 140. The mobile module; 150. The ranging module;

200. Coating tank; 210. Detection channel; 211. Image processing module;

300. Spraying device; 310. Sewage treatment pipeline;

400, drying device; 410, drying module; 420, air duct module; 430, first sensor;

500. Winding device.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiments.

When coating the thin film, it is pre-treated by magnetron, evaporation and other types of processing techniques. The thickness of the metal film surface of the film processed by magnetron and evaporation processes is insufficient or uneven, and the film surface resistance of the film is about 2000 milliohms. The film surface resistance of the film is too high. The thickness of the coating layer is increased so that the surface resistance of the film is lower than 500 milliohms. In order to increase the thickness of the coating layer of the film, the existing solution uses electroplating. During the electroplating process, if the electric current is set to the current limited during the electroplating process, the thickness of the coating layer of the film still cannot reach the required thickness range. However, when the thickness of the coating layer of the film is increased by increasing the current during electroplating, problems such as burning holes, perforation or film breakage will occur in the film, which affects the pass rate of film processing.

After analyzing the above situation, the researchers plan to use chemical coating to increase the thickness of the film. In the chemical coating method, the film needs to be flattened in advance, and the film passes through the coating tank at a constant speed. By controlling the moving rate of the film, the thickness of the coating layer attached to the film by the coating solution in the coating tank is different, and the faster the moving rate of the film is. Faster, the lower the thickness of the coating layer. Based on the idea of chemical coating, the researchers proposed a coating system, and then proposed a coating production line including the coating system.

The coating system proposed by the researchers is capable of coating multiple metal layers on thin films. The present invention will be exemplified by thin film copper plating in the following text. The film mentioned in the present invention refers to a thickness of 3.2um-8um, of course, the thickness of the film is not limited thereto.

Referring to Fig. 1 and shown in Fig. 2, Fig. 1 shows the module schematic diagram of the film coating system in one embodiment of the present invention, Fig. 2 is the structural representation of the film coating system in one embodiment of the present invention, the film coating provided by one embodiment of the present invention The system includes: an unwinding device 100 , a coating tank 200 , a spraying device 300 , a drying device 400 and a winding device 500 . Among them, the films that have not been coated by the coating pool 200 are stored in the unwinding device 100 , and the films that have been coated are stored in the winding device 500 . When the film is pre-coated, the film is pre-stretched by the unwinding device 100 and the winding device 500 . During film coating, when the unwinding device 100 and the winding device 500 are working, the film moves from the unwinding device 100 to the winding device 500 at a constant speed. The coating tank 200 is used for coating the film entering the winding device 500 from the unwinding device 100; the spraying device 300 is used for cleaning the film to remove residual coating liquid on the film; the drying device 400 is used for cleaning The final film is dried so that the winding device 500 can accommodate the coated film.

Specifically, the unwinding device 100 can accommodate and convey the film at a constant speed; the coating pool 200 is arranged on the output side of the unwinding device 100, and is used to store the coating solution for the film coating process delivered by the unwinding device 100, wherein the coating solution can be It is an electroless copper plating solution and an additive; the spray device 300 can clean the film after being coated by the coating pool 200; the drying device 400 is used to dry the film after the spray device 300 is cleaned; the winding device 500 is arranged in the drying The output side of the drying device can convey and store the film processed by the drying device 400 at a uniform speed.

The working principle of the coating system in this embodiment is: the unwinding device 100 and the winding device 500 flatten the film in advance, so that when the film passes through the coating pool 200, the coating solution can evenly adhere to the film. When the film needs to be coated, the film is removed from the unwinding device 100 and stored in the unwinding device 100 . When the film passes through the coating tank 200 at a constant speed, the coating solution in the coating tank 200 can evenly adhere to the film, thereby increasing the thickness of the coating layer of the film. By controlling the speed at which the film is conveyed by the unwinding device 100 , the thickness of the coating layer on the film can be increased differently. The thicker the film layer is, the lower the speed at which the film moves. After the coating layer on the film increases in thickness, it is washed by the spraying device 300 in sequence, dried by the drying device 400 and finally stored in the winding device 500 . Compared with the existing electroplating solutions, the solution in this example does not have problems such as hole burning, perforation or film breakage. In this solution, when it is necessary to increase or decrease the thickness of the coating layer of the film, it is only necessary to control the moving speed of the film through the unwinding device 100 and the winding device 500, so as to avoid increasing the current in electroplating. When the thickness of the coating layer is changed, the existing film has problems such as burning holes, perforation or film breakage.

When the film is accommodated in the unwinding device 100, in order to prevent the surface of the film from being folded, the smoothness of the film surface is affected, and the thickness of the coating layer on the film surface is affected during coating. The researchers thought of winding and storing the film in the unwinding device 100 . Specifically, referring to FIG. 2 , the unwinding device 100 includes a coil 110 , wherein the coil 110 can rotate around its own axis, so that the film is wound on the coil 110 . The reel 110 is arranged on the inflatable shaft and can rotate around the inflatable shaft. The inflatable shaft rotates at a constant speed through a driving element, such as a motor, and the through hole controls the rotating speed of the driving element so that the film on the coil 110 can move at a constant speed.

When the unwinding device 100 drives the film, since there is still a distance between the unwinding device 100 and the coating tank 200, the gravity of the film itself will cause the film to bend downward, which may affect the flatness of the film surface. For this reason, the unwinding device 100 also includes multiple sets of rollers 120 arranged at intervals, as shown in FIG. 2 , and the rollers 120 are used for conveying the film. That is to say, the multiple sets of rollers 120 can support and convey the film, thereby better preventing the film from bending downwards. Each set of rollers 120 can include upper rollers and lower rollers that are arranged oppositely, there is a conveying channel between the upper rollers and the lower rollers, and the film is conveyed from the conveying channel; or each group of rollers 120 can also be a single roller wheel composition.

When the reel 110 in the unwinding device 100 is conveying the film, in order to make the film as flat as possible, a greater pulling force needs to be applied to the film. Although the reel 110 also exerts a corresponding force on the film during the winding process, the force is relatively weak, and the surface of the film will be uneven. For this reason, the researchers thought of exerting a pressing force on the film wound on the unwinding device 100, so that the film conveyed from the unwinding device 100 can be better flattened, so as to ensure that the coating layer on the film is uniform. Specifically, as shown in FIG. 3 , the unwinding device 100 also includes a pressing mechanism 130, wherein the pressing mechanism 130 is rotatably arranged on the unwinding device 100, and the pressing mechanism 130 includes a contact pressing head 131, which touches the pressing head 131 is used for pressing the film on the reel 110 . It should be noted that the pressing mechanism 130 can be arranged on the unwinding device 100 through a rotating shaft connection, and can also be driven by a driving element, such as a motor, to rotate the pressing mechanism around the unwinding device 100; the touch head 131 includes a pressure sensor , enabling the embodiment to detect and adjust the pressure applied to the membrane.

When the film is conveyed in the coating system, due to the manufacturing accuracy of the system itself or the reason that the system is applied to the film, there is a deviation between the actual conveying direction of the film and the direction of the film conveyed by the system itself. It can be understood that the actual conveying direction of the film is different from that of the system. The direction of transmission is skewed. If this misalignment is not corrected, the force that the system exerts on the membrane may change, causing the membrane to break. To this end, in one embodiment, referring to Fig. 3, the unwinding device 100 is provided with a mobile module 140 and a distance measuring module 150 capable of communicating with each other, wherein the distance measuring module 150 is used to measure the thickness of the film on the reel 110, The moving module is used to drive the unwinding device 100 to move on the horizontal plane in a direction perpendicular to the film conveying direction. When the film does not deviate, the thickness of the film detected by the ranging module 150 changes uniformly, but when the film deviates, the thickness of the film measured by the ranging module 150 will change. For example, the thickness of each layer of film is X, the number of layers of film on the reel 110 of the unwinding device 100 is 10 at present, and the thickness that the ranging module 150 can detect is 10X. Under normal circumstances, after the coiling reel 110 makes one turn, the thickness of the film measured by the distance measuring module 150 becomes 9X, and when the film deviates, the distance measuring module will The film thickness measured at 150 becomes 9X, which indicates that the film is deviated. Therefore, it is necessary to adjust the movement of the unwinding device 100 through the moving module 140 so that the direction in which the film is conveyed by the unwinding device 100 coincides with the direction in which the film is actually conveyed. The ranging module 150 may include a plurality of laser ranging sensors, and the laser ranging sensors may be distributed and arranged on the edge of the reel 110 of the unwinding device 100 . The transfer module may include a servo motor, and the unwinding device 100 may be driven to move through the connection between the servo motor and the lead screw. Of course, the transfer module can also be a linear motor or other similar driving elements for translational movement.

In another embodiment, the structure of the unwinding device 100 is similar to that of the unwinding system, and may include a coil 110 and a roller 120 in the unwinding system. The difference is that the coil 110 in the unwinding device 100 uses The coated film is wound, and the reel 110 in the unwinding system is used to remove the pre-coated film. A pressing mechanism 130, a moving module 140 and a distance measuring module 150 may also be provided in the unwinding device 100, and its working principle is similar to that of the device in the unwinding system.

When the film is stored in the unwinding device 100, since the film is wound sequentially, it is difficult to judge the surface quality of the film itself. If there is a problem with the surface quality of the film itself, the film needs to be removed in time to reduce the loss of film production. The surface quality of the film includes film breakage, perforation or flatness. For this reason, researchers think of performing surface quality inspection on the thin film before the thin film is sent to the coating tank 200 . Specifically, as shown in FIG. 2 , the side of the coating pool 200 close to the unwinding device 100 is provided with a detection channel 210 for the film to pass through, wherein the detection channel 210 communicates with the coating pool 200, and the detection channel 210 is provided with multiple groups of images. The processing module 211 is used to detect the surface quality of the film, and the image processing module 211 can communicate with the unwinding device 100 . In this embodiment, the image processing module 211 can recognize the surface quality of the film in real time. If the image processing module 211 recognizes that the surface quality of the film is abnormal, it can control the unwinding device 100 to stop working and the film to stop conveying. When the image processing module 211 is arranged, it can be arranged on the upper surface of the film and the lower surface of the film, so that the surface quality of the two surfaces of the film can be identified and processed.

After the thin film is coated by the coating tank 200 , the coating solution may still remain on the surface of the thin film, which needs to be cleaned by the spraying device 300 . Since the coating liquid contains metal materials, if the waste liquid after spraying is discharged directly, on the one hand, it may pollute the water source; on the other hand, it may also cause a large waste of materials. For this reason, researchers think of recycling the waste liquid after cleaning the spraying device 300 . Specifically, the shower device 300 is connected with a sewage treatment pipeline 310 for recovering waste liquid used by the shower device 300 . When the spraying device 300 rinses the film, pure water can be used; the spraying device 300 can include a plurality of spraying holes, so as to remove residual coating solution on the film as much as possible.

After the coated film is cleaned by the spray device 300 , the film needs to be dried to facilitate storage of the coated film. During the drying process of the film, it is necessary to consider that the heat of the drying device 400 can be evenly distributed, so the researchers thought of setting the air duct module 420 in the drying device 400 . Specifically, referring to FIG. 4 , the drying device 400 includes a drying module 410 and an air channel module 420 , wherein the air channel module 420 is used to evenly blow the heat of the drying module 410 to the film.

Further, in order to prevent the drying temperature generated by the drying device 400 from being too high, thereby affecting the surface quality of the film, it can be adjusted by setting a sensor. Specifically, referring to FIG. 4 , the drying device 400 further includes a first sensor 430 , wherein the first sensor 430 is used to detect the temperature generated by the drying module 410 , and the first sensor 430 is electrically connected to the drying module 410 . The first sensor 430 may be a temperature sensor, and when the first sensor 430 detects an abnormal temperature, it may control the drying module 410 to reduce the drying temperature.

In the present invention, a coating production line is also proposed, wherein the coating production line includes the above-mentioned coating system. In this coating production line, the unwinding speed of the unwinding system in the coating system is 3-5m/min, the shaft diameter of the reel 110 is 80-100mm, and the pressure setting of the touch head 131 can be 2kg/m ² ; when the coating tank 200 is copper-plated, the material can be selected plastics, such as PFA material plastics, PP material plastics or PVC material plastics, the width of the coating tank 200 can be 1350mm～1650mm, the groove depth can be 500mm～600mm, and the length is 3m ~4m; the spraying device 300 can include 4 washing tanks, wherein the material of the washing tanks can be plastic, such as PFA plastic, PP plastic or PVC plastic; the width of each washing tank can be 1500mm-1650mm, and the depth It can be 600mm-700mm, the length is 3m-5m, the diameter of the spray pipe can be 10-20mm, the spray port is 2mm-5mm, and the number of spray pipes is 30-50; the air duct module in the drying device 400 The hole diameter at the air outlet of 420 is 3mm-5mm, and the wind speed is 2m/s.

When the film is copper-plated by this system, the researchers detected the film after the film production of the coating system, and found that the film produced by the present invention can completely improve the disadvantages of the pinpoint-shaped perforated hole in the coating. The copper layer is continuous without pinholes. Relying on the coating system proposed in the present invention, it is suitable for industrial production of thin film coating, and then the copper deposition speed on the magnetron or evaporated copper film is greatly improved, the coating time is shortened, and the thin film can also obtain a fine and continuous copper coating layer.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above examples only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the scope of the patent for the invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims

A kind of coating system, is characterized in that, described coating system comprises:

The unwinding device can accommodate and convey the film at a constant speed;

A coating pool, arranged on the output side of the unwinding device, the coating pool is used to store coating liquid, so as to process the thin film delivered by the unwinding device;

a spraying device capable of cleaning the film coated by the coating pool;

a drying device, used for drying the film after cleaning the spraying device;

The winding device is arranged on the output side of the drying device, and can convey and store the film processed by the drying device at a uniform speed.
The coating system according to claim 1, wherein the unwinding device comprises a coil, and the coil can rotate around its own axis, so that the film is wound on the coil.
The coating system according to claim 2, wherein the unwinding device further comprises multiple groups of rollers arranged at intervals, and the rollers are used to convey the film.
The coating system according to claim 3, wherein the unwinding device further includes a pressing mechanism, the pressing mechanism is rotatably arranged on the unwinding device, and the pressing mechanism includes a touch pressure head, and the touch pressure head is used for pressing the film on the reel.
The coating system according to claim 4, wherein the unwinding device is provided with a mobile module and a distance measuring module capable of communicating with each other, and the distance measuring module is used to measure the distance of the film on the reel. thickness, the moving module is used to drive the unwinding device to move on a horizontal plane in a direction perpendicular to the film conveying direction.
The coating system according to claim 1, wherein a detection channel for the film to pass through is provided on the side of the coating pool close to the unwinding device, and the detection channel communicates with the coating pool, The detection channel is provided with multiple sets of image processing modules for detecting the surface quality of the film, and the image processing modules can communicate with the unwinding device.
The coating system according to claim 1, wherein the spraying device is connected with a sewage treatment pipeline for recycling waste liquid used by the spraying device.
The film coating system according to claim 1, wherein the drying device comprises a drying module and an air duct module, and the air duct module is used to evenly blow the heat of the drying module to the film.
The coating system according to claim 8, wherein the drying device further comprises a first sensor, the first sensor is used to detect the temperature generated by the drying module, and the first sensor and the The drying module is electrically connected.
A coating production line, characterized by comprising the coating system according to any one of claims 1-9.