Thinning method and thinning system

Abstract

The invention discloses a thinning system and a thinning method.The thinning method is used for thinning an invar strip, and the thinning method comprises the steps that the invar strip is driven to penetrate through a soaking tank at the set speed and the set tension, thinning liquid is arranged in the soaking tank, and the set tension ranges from 20 N to 80 N; a liquid supplementing assembly is adopted for supplementing thinning liquid to the soaking tank, liquid discharging is conducted on the soaking tank, the thinning liquid comprises a thinning agent and a solvent, so that the specific gravity of the thinning agent and the solvent of the thinning liquid in the soaking tank is kept between 1.4 g / cm < 3 > and 1.6 g / cm < 3 >, and the temperature of the thinning liquid in the soaking tank is kept between 35 DEG C and 55 DEG C.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision metal mask manufacturing, in particular, the present application relates to a thinning method and a thinning system. BACKGROUND

[0002] In the thinning process of invar foil, the thinning methods of fixed nozzle and swing nozzle are often used, however, these thinning methods have the problems of uneven thinning and poor quality of the thinned foil.

[0003] How to improve the thinning uniformity of invar foil and improve the quality of the thinned foil is a problem to be solved in the field. SUMMARY

[0004] The present application aims to solve one of the problems in the related art to some extent. To this end, the present application provides a thinning method and a thinning system.

[0005] In order to achieve the above-mentioned purpose, as a first aspect of the present application, a thinning method for thinning invar strip is disclosed, the thinning method comprises: driving the invar strip to pass through the soaking tank at a set speed and a set tension, the soaking tank is provided with a thinning liquid, and the set tension is between 20N and 80N; adopting a liquid supplementing assembly to supplement the thinning liquid to the soaking tank and drain the soaking tank, the thinning liquid comprises a thinning agent and a solvent, so that the specific gravity of the thinning agent and the solvent in the soaking tank is maintained between 1.4g / cm 3 and 1.6g / cm 3 , and the temperature of the thinning liquid in the soaking tank is maintained between 35℃ and 55℃.

[0006] Further, the liquid supplementing assembly supplements the thinning liquid to the soaking tank, comprising: adopting a first liquid supplementing assembly and a second liquid supplementing assembly to supplement the thinning liquid to the soaking tank respectively, the first liquid supplementing assembly and the second liquid supplementing assembly are oppositely and intervally arranged, the interval is for the invar strip to pass through, the first liquid supplementing assembly is located at the top of the invar strip, the second liquid supplementing assembly is located at the bottom of the invar strip, the liquid supplementing ports of the first liquid supplementing assembly and the second liquid supplementing assembly respectively face two surfaces of the invar strip, and the sum of the liquid supplementing amounts of the first liquid supplementing assembly and the second liquid supplementing assembly is greater than the drainage amount of the soaking tank, wherein the liquid supplementing amount of the first liquid supplementing assembly is greater than or equal to the liquid supplementing amount of the second liquid supplementing assembly. Further, the difference between the liquid supplementing amount provided by the liquid supplementing assembly per unit time and the drainage amount of the soaking tank is between 1000L / min and 1500L / min.

[0007] Furthermore, the temperature of the thinning solution provided by the replenishment component is between 40°C and 55°C, and the acid reduction potential of the thinning solution in the soaking tank is between 400mV and 600mV.

[0008] Furthermore, the thinning agent includes ferric chloride and hydrochloric acid, wherein the hydrochloric acid content in the thinning solution is between 3 g / L and 12 g / L, the ferric chloride content in the thinning solution is between 40% and 49%, and the electrode difference of the ferric chloride in the thinning solution is between 45 and 90.

[0009] Furthermore, in the step of driving the Invar belt through the soaking tank at a set speed and a set tension, the set speed of the Invar belt is between 0.5 m / min and 5 m / min.

[0010] Further, driving the Invar belt through the soaking tank at a set speed and a set tension includes: The Invar strip is transported using a transmission device, which includes a speed adjustment module for adjusting the transport speed of the Invar strip. The Invar strip is transmitted at a first speed over a set distance; The speed adjustment module is used to transmit the Invar tape at a second speed, wherein the first speed is greater than the second speed.

[0011] As a second aspect of this application, a thinning system is disclosed, the thinning system comprising: The thinning device includes a conveying device and a thinning device, the thinning device comprising a replenishing component and an soaking tank, the conveying device being used to drive the Invar tape through the soaking tank at a set tension and a set speed, the set tension being between 20N and 80N, the soaking tank being used to contain thinning liquid and be able to drain the liquid, and the replenishing component being used to replenish the thinning liquid in the soaking tank.

[0012] Furthermore, the liquid replenishment assembly includes a first liquid replenishment assembly and a second liquid replenishment assembly, which are arranged opposite to each other and spaced apart, with the gap allowing the Invar strip to pass through. The liquid replenishment ports of the first liquid replenishment assembly and the second liquid replenishment assembly face the two surfaces of the Invar strip, respectively, and the first liquid replenishment assembly and the second liquid replenishment assembly replenish the soaking tanks on the two surface sides of the Invar strip.

[0013] Furthermore, the soaking tank is provided with a plurality of first liquid-repelling wheels and a plurality of conveying shafts, at least one first liquid-repelling wheel and at least one conveying shaft are arranged opposite to each other along the height direction of the soaking tank, and there is a gap between the first liquid-repelling wheel and the conveying shaft, the gap being used for the invar strip to pass through.

[0014] This application utilizes a thinning method and system that replaces the traditional spray-type thinning method with a full immersion thinning process. This effectively overcomes the uneven thinning problem inherent in spray-type thinning. The Invar strip is completely immersed in the thinning solution under constant tension and a set speed, ensuring full and continuous contact between the entire surface and the solution. This avoids localized thinning differences caused by uneven nozzle coverage, liquid accumulation in cross-areas, or insufficient liquid in spray-type methods. This solution employs an immersion tank method, eliminating mechanical impact or localized etching, preventing the amplification of defects or the generation of new defects, thus achieving a cleaner and smoother surface morphology. The concentration and temperature of the thinning solution are dynamically controlled by a replenishment component to maintain the stability of the reaction system and ensure consistent thinning rates during long-term continuous production. The thinned Invar products have a smoother appearance, finer texture, and lower roughness, thereby improving material utilization and the yield of Invar products, and significantly enhancing the efficiency of Invar product manufacturing.

[0015] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of the present invention will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of the present invention. In addition, each of these features, elements and components appearing in the following text and drawings is a plurality of, and different symbols or numbers are used for convenience of representation, but all represent parts with the same or similar construction or function. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a flowchart of one implementation of the thinning method provided in this application; Figure 2 This is a schematic diagram of one embodiment of the thinning system provided in this application; Figure 3 This is a schematic diagram of one embodiment of the pre-cleaning device provided in this application; Figure 4 These are photographs of the surface morphology of the thinned Invar strip provided in the embodiments of this application; Figure 5 These are photographs of the surface morphology of the thinned Invar strip provided in the embodiments of this application.

[0017] Explanation of reference numerals in the attached figures 1: Thinning system; 2: Conveying device; 3: Invar strip; 21: Automatic correction module; 1a: Thinning device; 1b: First washing device; 1c: Second washing device; 1d: Drying device; 10: Soaking tank; 11a: First liquid-blocking wheel; 12: Conveying shaft; 13a: First liquid replenishment assembly; 13b: Second liquid replenishment assembly; 14a: Third liquid knife; 14b: Fourth liquid knife; 15: Conveying roller; 16: Washing nozzle; 2a: Alkali washing device; 20: Alkali washing nozzle; 2b: Pre-washing device; 2c: Pre-drying device. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain the present invention and should not be construed as limiting the invention.

[0019] The terms "an embodiment," "example," or "example" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this application. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0020] Currently, Invar materials (15~30µm thick) that can be stably used in mass production of FMMs are very scarce. Existing methods involve purchasing materials that meet the standards or using 40µm thick materials and thinning them to the required thickness. In the uniform thinning process of Invar tape, fixed nozzles and swing nozzles are used to adapt to the specific thinning requirements of Invar materials of different widths. Fixed nozzles and different numbers of swing nozzles can be activated as needed, thereby achieving precise control of the thinning process.

[0021] However, the inventors of this application have discovered that using fixed and oscillating nozzles for thinning inevitably results in spray overlap areas and liquid drip marks, making it impossible to ensure the material's appearance and overall uniformity. Defects inherent in the material, such as scratches, streaks, and calendering lines, become more pronounced during thinning with fixed and oscillating nozzles. Due to the poor appearance of spray-thinned materials, when manufacturing FMM products (especially those with undercuts), textured areas exhibit bulging, accompanied by uneven undercuts, macroscopic deformation, and poor overall appearance, resulting in a low overall yield.

[0022] To address the aforementioned problems, as a first aspect of the present invention, a thinning method is disclosed, such as... Figure 1 As shown, the thinning method is used to thin the Invar strip, and the thinning method includes: S100: Drive the Invar belt through the soaking tank at a set speed and set tension. The soaking tank is filled with a thinning liquid, and the set tension is between 20N and 80N. S200: A replenishment assembly is used to replenish the thinning solution in the soaking tank and to drain the tank. The thinning solution includes a thinning agent and a solvent, ensuring that the specific gravity of the thinning agent to the solvent in the soaking tank is maintained at 1.4 g / cm³. 3 Up to 1.6 g / cm 3 During this period, the temperature of the thinning solution in the soaking tank was maintained between 35°C and 55°C.

[0023] This application utilizes a thinning method and system that replaces the traditional spray-type thinning method with a full immersion thinning process. This effectively overcomes the uneven thinning problem inherent in spray-type thinning. The Invar strip is completely immersed in the thinning solution under constant tension and a set speed, ensuring full and continuous contact between the entire surface and the solution. This avoids localized thinning differences caused by uneven nozzle coverage, liquid accumulation in cross-areas, or insufficient liquid in spray-type methods. This solution employs an immersion tank method, eliminating mechanical impact or localized etching, preventing the amplification of defects or the generation of new defects, thus achieving a cleaner and smoother surface morphology. The concentration and temperature of the thinning solution are dynamically controlled by a replenishment component to maintain the stability of the reaction system and ensure consistent thinning rates during long-term continuous production. The thinned Invar products have a smoother appearance, finer texture, and lower roughness, thereby improving material utilization and the yield of Invar products, and significantly enhancing the efficiency of Invar product manufacturing.

[0024] In step S100, this application does not limit how the Invar tape is driven through the soaking tank at a set speed and tension, as long as the set speed and tension are met. For example, a conventional roll-to-roll system can be used. In some specific embodiments, such as Figure 2 As shown, the invar strip is transported using the transmission device 2. The transmission device 2 includes an unwinding mechanism and a winding mechanism. The unwinding mechanism is located upstream of the soaking tank and is used to unwind and output the invar strip. The winding mechanism is located downstream of the soaking tank and is used to wind up the invar strip. Automatic correction modules 21 are respectively set on both sides of the unwinding mechanism and the winding mechanism to ensure the stable and centered transport of the invar strip.

[0025] The set speed is to accommodate the residence time of the strip in the immersion tank. A slower speed results in a longer reaction time and greater thinning, and vice versa. The conveying speed can control the overall thinning per unit length to achieve the target thickness. In some embodiments, the set speed for Invar strip is between 0.5 m / min and 5 m / min. Too slow a speed may cause excessive corrosion, edge effects, or surface roughness; however, too fast a speed leads to insufficient reaction, resulting in inadequate or uneven thinning. A reasonable speed setting allows the chemical thinning reaction to be kinetically optimal, yielding a smooth and consistent Invar strip surface.

[0026] Setting the tension helps maintain the strip's flatness, preventing wrinkles or floating. Applying a tension of 20N to 80N straightens it and ensures it conforms to the path below the liquid surface, guaranteeing uniform immersion across the entire width and preventing areas from not contacting the thinning liquid. Insufficient tension causes the strip to loosen, easily leading to wrinkles, serpentine deviation, and further uneven thinning; excessive tension stretches the material, resulting in plastic deformation, abnormal thickness, or breakage. In this application, the 20N to 80N range represents an optimized window balancing flatness and material safety, particularly suitable for ultra-thin Invar alloys.

[0027] Setting the tension in conjunction with the set speed ensures that each roll and batch of strip is under the same thinning conditions, improving process repeatability and product consistency.

[0028] In step S200, this application does not specifically limit how the replenishing component replenishes the liquid, as long as the concentration and temperature of the soaking tank are within the specified range. For example, it can be done using an inlet pump and an outlet pump, or through a spray head, or even by a liquid jet replenishment method. As an optional implementation, using the replenishing component to replenish the thinning liquid in the soaking tank includes: The soaking tank is replenished with liquid using a first liquid replenishing component and a second liquid replenishing component. The first liquid replenishing component and the second liquid replenishing component are arranged opposite each other and spaced apart, allowing the Invar strip to pass through. The first liquid replenishing component is located at the top of the Invar strip, and the second liquid replenishing component is located at the bottom of the Invar strip. The liquid replenishing ports of the first liquid replenishing component and the second liquid replenishing component face the two surfaces of the Invar strip, respectively. The sum of the liquid replenishing volume of the first liquid replenishing component and the second liquid replenishing component is greater than the liquid discharge volume of the soaking tank. The liquid replenishing volume of the first liquid replenishing component is greater than or equal to the liquid replenishing volume of the second liquid replenishing component.

[0029] The dual-liquid-supply assembly ensures symmetry and balance in the thinning environment of the upper and lower surfaces. While the Invar strip is fully submerged in the soaking tank, relying solely on natural diffusion or unilateral liquid supply can lead to differences in the concentration, temperature, and flow state of the thinning liquid on the upper and lower surfaces, resulting in inconsistent thinning rates and causing warping or thickness deviations. This solution addresses this by using opposing inlets of the first and second liquid-supply assemblies to directionally supply liquid to both surfaces, continuously replenishing the thinning agent and inducing temperature exchange. This ensures consistent thinning liquid concentration and temperature on both surfaces, maintaining stable reaction kinetics and improving thinning efficiency and consistency. The vertical convection also helps to rapidly homogenize the concentration and temperature of the thinning liquid within the tank, maintaining stable surface reactions even at the set transfer speed.

[0030] The thinning amounts of the first and second liquid replenishment components can also be different. Each component independently adjusts the thinning amount of the two surfaces of the Invar strip. Preferably, the liquid replenishment amount of the first liquid replenishment component is greater than or equal to the liquid replenishment amount of the second liquid replenishment component. In some embodiments, during the subsequent fabrication of pixel holes, the FMM is prone to deformation from the second surface to the first surface due to the shape of the vapor-deposited holes. Therefore, it is necessary to control the thinning amount of the two surfaces of the Invar strip in the thinning process, ensuring that the thinning amount of the second surface is greater than that of the first surface. This allows the Invar strip to release some internal stress during the thinning process. Because the thinning amount of the second surface is greater, more internal stress is released compared to the first surface, balancing the internal stress of the Invar strip. Thus, after the Invar strip is fabricated into an FMM, the tendency for the second surface to deform towards the first surface will be weakened or eliminated, allowing the FMM to adhere well to the substrate and improving the screen yield.

[0031] Preferably, the difference between the replenishment volume provided by the replenishment component and the drainage volume of the soaking tank per unit time is between 1000L / min and 1500L / min. The exchange frequency of the thinning liquid in the soaking tank per unit time affects the actual thinning rate. Within this range, the uniform thinning of the Invar strip under the set tension and transmission speed can be guaranteed.

[0032] In some embodiments, the temperature of the thinning solution after reaction in the soaking tank is lower than the temperature of the newly replenished thinning solution. The low temperature will reduce the thinning rate. The temperature of the thinning solution provided by the replenishment component is between 40°C and 55°C, providing sufficient temperature exchange for the soaking tank.

[0033] In other embodiments, in order to facilitate stable monitoring of the thinning solution in the soaking tank, in addition to temperature and concentration, the potential of the thinning solution is also monitored to predict the redox capacity of the thinning solution. Preferably, the acid reduction potential of the thinning solution in the soaking tank is between 400mV and 600mV.

[0034] The thinning agent includes ferric chloride and hydrochloric acid. The hydrochloric acid content in the thinning solution is between 3 g / L and 12 g / L, and the ferric chloride content is between 40% and 49%. The electrode difference of ferric chloride in the thinning solution is between 45 and 90. Ferric chloride is used to replace iron and nickel in the Invar strip, while hydrochloric acid is used to inhibit the hydrolysis of ferric ions, enhance the oxidation capacity of ferric ions, adjust the acidity of the solution, and control the reaction rate. The content ratio of ferric chloride and hydrochloric acid in the thinning agent of this application is the optimal concentration range determined by comprehensively considering the components in the Invar strip and the thinning rate of the soaking tank. Since the concentration and content cannot be obtained quickly in actual production, this application also adds monitoring of the electrode difference of ferric chloride in the thinning solution to determine the redox capacity of ferric chloride in the actual thinning solution. In the step of driving the Invar tape through the soaking tank at a set speed and tension, since the liquid replenishment component of this application is used for liquid replenishment, if the liquid replenishment port is too small, the new liquid replenishment will generate a large liquid pressure, which will disrupt the flow field of the thinning liquid in the soaking tank. In severe cases, it may even break the thinning liquid and impact the Invar tape, causing deformation. Preferably, the dimension of the liquid replenishment port of the liquid replenishment component along the length direction of the Invar tape is not less than 0.1 mm. At the same time, the width of the liquid replenishment port needs to be adapted to the width of the Invar tape to ensure that liquid can be replenished at various positions along the width direction. Preferably, the dimension of the liquid replenishment port along the width direction of the Invar tape is greater than or equal to the width of the Invar tape.

[0035] In some embodiments, the Invar strip is relatively long, exceeding 60m. From the start to the end of the transmission, there will be a thickness difference of several micrometers between the head and tail of the Invar strip. This is due to the consumption of the thinning liquid. The thinning liquid is continuously consumed, and the newly replenished liquid cannot completely ensure uniform thinning. Consequently, the Invar strip near the tail will have less thinning due to insufficient replenishment of the effective concentration of the thinning liquid, resulting in a greater thickness. To make the thickness of such long Invar strips more uniform at both ends, this application also adds a staged speed reduction function. The Invar strip is transmitted using a transmission device, which includes a speed adjustment module for adjusting the transmission speed of the Invar strip. The conveyor belt is transmitted at a first speed over a set distance; A speed regulation module is used to transmit the Invar strip at a second speed, wherein the first speed is greater than the second speed. This application does not specifically limit the first and second speeds; they can be calculated based on the length of the Invar strip and the actual thickness deviation. The set distance is also not limited; it can be a fixed distance at the middle or near the end. In some embodiments, the Invar strip is 60 meters long. The initial thinning speed is 2.52 m / min, which automatically decreases to 2.51 m / min after thinning to 20 meters, and then decreases to 2.50 m / min after another 20 meters of thinning. This ensures consistency in thickness before and after thinning and reduces errors.

[0036] As an optional implementation, after driving the Invar belt through the soaking tank at a set speed and a set tension, the process further includes: The thinned Invar strip is cleaned and dried to remove any remaining thinning liquid from the surface.

[0037] In some embodiments, such as Figure 2 As shown, the thinned Invar strip undergoes a cleaning and drying process, including: The two surfaces of the Inwa strip are rinsed separately using a third and fourth liquid knife. The third and fourth liquid knives spray cleaning fluid onto the Inwa strip. The third liquid knife is located at the top of the Inwa strip, and its nozzle is opposite to the transmission direction. The fourth liquid knife is located at the bottom of the Inwa strip. The liquid knife cleaning method is used first. The liquid knife can generate a large cleaning pressure to quickly remove the thinning liquid residue on the surface. The third liquid knife at the top is opposite to the transmission direction, which produces a reverse liquid flushing effect, making the thinning liquid removal more thorough. The fourth liquid knife at the bottom can be in the same direction as the third liquid knife or not. Water spray nozzles are used to spray both sides of the Invar strip separately; after the above liquid knife cleaning, spray cleaning is used to gently clean and remove residual thinning liquid. The strip material of the invar is dried.

[0038] In the step of rinsing the two surfaces of the Invar strip separately using the third and fourth liquid knives, the liquid knives in the cleaning section need to spray liquid to generate greater cleaning pressure. Preferably, the size of the spray nozzle of the third liquid knives along the length of the Invar strip is no more than 0.12 mm, thereby generating greater spray pressure and improving the thinning liquid removal effect.

[0039] In some embodiments, such as Figure 3 As shown, before driving the Invar belt through the soaking tank at a set speed and a set tension, the process also includes: The strip material is sprayed with an alkaline solution to remove surface defects such as particles, rust, dirt, or protrusions. The strip material is washed and sprayed with water to remove alkaline solution residue; The strip material of the invar is dried.

[0040] As a second aspect of this application, a thinning system 1 is disclosed, such as Figure 2 As shown, the thinning system 1 includes: The conveying device 2 and the thinning device 1a are included. The thinning device 1a includes a liquid replenishment component and an immersion tank 10. The conveying device 2 is used to drive the Invar strip 3 through the immersion tank 10 at a set tension and a set speed. The set tension is between 20N and 80N. The immersion tank 10 is used to contain the thinning liquid and is capable of draining the liquid. The liquid replenishment component is used to replenish the thinning liquid in the immersion tank 10.

[0041] The liquid replenishment assembly includes a first liquid replenishment assembly 13a and a second liquid replenishment assembly 13b. The first liquid replenishment assembly 13a and the second liquid replenishment assembly 13b are arranged opposite to each other and spaced apart, allowing the Invar strip 3 to pass through. The liquid replenishment ports of the first liquid replenishment assembly 13a and the second liquid replenishment assembly 13b face the two surfaces of the Invar strip 3 respectively. The first liquid replenishment assembly 13a and the second liquid replenishment assembly 13b replenish the soaking tank 10 on the two surface sides of the Invar strip 3 respectively.

[0042] In some embodiments, the soaking tank 10 includes a first inlet and a first outlet disposed on the sidewall, the first inlet and the first outlet being disposed opposite to each other. The Invar strip 3 can enter the soaking tank 10 through the first inlet and exit the soaking tank 10 through the first outlet. The height of the first inlet and the first outlet is greater than the thickness of the Invar strip 3, so that the thinning liquid in the soaking tank 10 can flow out from the first inlet and / or the first outlet. The overflow rate of the soaking tank 10 through the first inlet and the first outlet is between 1000 L / min and 1500 L / min. In some embodiments, the discharge rate of the soaking tank 10 includes the pumped amount and the overflow rate from the first inlet and the first outlet. Since the first inlet and the first outlet are also used for the Invar strip 3 to pass through, the thinning liquid overflowing from here is the thinning liquid closest to the Invar strip 3. In the actual thinning process, the thinning liquid closest to the Invar strip 3 reacts with the Invar strip 3 first, and the reacted thinning liquid can be carried out from the first inlet or the first outlet. New thinning liquid continues to replenish to ensure that an effective thinning reaction always occurs.

[0043] In some embodiments, the soaking tank 10 is provided with a plurality of first baffle rollers 11a and a plurality of conveying shafts 12. At least one first baffle roller 11a and at least one conveying shaft 12 are arranged opposite to each other along the height direction of the soaking tank 10. There is a gap between the first baffle roller 11a and the conveying shaft 12, and the gap is used for the invar strip 3 to pass through.

[0044] In some embodiments, the thinning device 1a further includes a first washing device 1b, a second washing device 1c, and a drying device 1d arranged sequentially along the conveying direction of the Inwa strip 3. The first washing device 1b is located between the thinning device 1a and the second washing device 1c. The first washing device 1b and the second washing device 1c are used to clean the thinned Inwa strip 3, and the drying device 1d is used to dry the cleaned Inwa strip 3. The first washing device 1b includes a third liquid knife 14a and a fourth liquid knife 14b. The third liquid knife 14a is located on the upper side of the Inwa strip 3, and the spraying direction of the third liquid knife 14a is opposite to the conveying direction. The fourth liquid knife 14b is located on the lower side of the Inwa strip 3. The third liquid knife 14a and the fourth liquid knife 14b are used to spray cleaning liquid onto the Inwa strip 3. The first washing device 1b also includes a conveying roller 15 for providing driving force to the Inwa strip 3 in the middle of the thinning system 1. The second washing device 1c includes a washing nozzle 16, which is arranged vertically to wash the front and back sides of the Invar strip 3 respectively.

[0045] In some embodiments, the thinning system 1 further includes a pre-cleaning mechanism, which includes an alkaline washing device 2a, a pre-water washing device 2b, and a pre-drying device 2c. The alkaline washing device 2a includes multiple alkaline washing nozzles 20 disposed on the front and back sides of the Invar strip 3, and the alkaline washing nozzles 20 are used to spray an alkaline solution. The pre-water washing device 2b includes multiple water washing nozzles 16 for removing alkaline solution residue. The pre-drying device 2c is used to dry the pre-cleaned Invar strip 3.

[0046] In some embodiments, the thinning device 1a further includes a conveying shaft 12 located at the inlet, opening, and between the inlet and opening of the soaking tank 10, for supporting and conveying the Invar strip 3 within the soaking tank. In other embodiments, the thinning device 1a further includes a pressure roller disposed inside the soaking tank 10 and above one of the conveying shafts, capable of pressing down the Invar strip 3 to prevent it from floating within the soaking tank 10.

[0047] In other embodiments, during thinning, a roll-to-roll process is used. Pressure rollers at both ends of the soaking tank hold the material in place to prevent significant movement. A drive shaft is installed in the middle of the soaking tank, with replenishing liquid blades above and below it to ensure continuous replenishment. The liquid overflows from the tank, ensuring constant replenishment of the thinning solution. After the material exits the soaking section, it undergoes a first water wash using a water jet rinsing method.

[0048] The thinning system and method described in this application result in products with a smoother appearance, finer texture, and lower roughness, significantly improving the yield rate in FMM manufacturing. The thinning method and system of this application are applicable to various wide-width products, demonstrating strong versatility.

[0049] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0050] Example Example 1 A method for thinning Invar strip is provided, comprising: S1. Provide Invar strip, 400mm wide; S2. The above-mentioned Invar strip is pre-cleaned with an alkaline solution, then washed with water and sprayed and dried. S3. Drive the above-mentioned Invar strip through the soaking tank at a set speed and a set tension. The soaking tank is filled with a thinning liquid and the set tension is between 20N and 80N. A replenishment assembly is used to add thinning solution to the soaking tank, and the tank is then drained. The thinning solution includes a thinning agent and a solvent, maintaining the specific gravity of the thinning agent to the solvent in the soaking tank at 1.4 g / cm³. 3 Up to 1.6 g / cm 3 During this period, the temperature of the thinning solution in the soaking tank was maintained between 35°C and 55°C. The thinned Invar strip is subjected to a first water washing treatment, and the front and back sides are cleaned using upper and lower liquid knives; A second water wash is performed, using upper and lower spray nozzles to clean the front and back sides; The cleaned Invar strip was dried to obtain the first sample. The test data of the first sample are shown in Table 1.

[0051] Comparative Example The Invar strip was thinned by spraying a thinning liquid to obtain sample 2, and the test data of sample 2 are shown in Table 2.

[0052] Test case The surface morphology and roughness of the samples from Example 1 and the comparative example were observed and measured, such as... Figure 4 and Figure 5 And as shown in Tables 1 and 2. According to Figure 4 and Figure 5 It can be seen that, all other things being equal, Figure 4 The sample prepared by soaking and thinning has a delicate surface, without bumps or color difference, which is more conducive to product manufacturing and meets production requirements.

[0053] Table 1. Roughness data of the first sample after immersion thinning in Example 1

[0054] Table 2. Roughness data of the second sample after comparative spray thinning.

[0055] According to the data in Tables 1 and 2, the roughness of the immersion-thinned sample is more consistent and smaller at different locations of the same sample, which is more conducive to the subsequent etching of the opening of the product; while the roughness of the spray-thinned sample varies greatly at different locations of the surface, and the roughness at each location is also larger.

[0056] This application also measured the thickness and roughness of several soaked and thinned samples, and the results are shown in Tables 3 and 4, respectively. Samples 1 to 62 are different Invar tape numbers. The differences between the samples are that the transmission speed, width, film thickness and roughness are slightly different in Tables 3 and 4.

[0057] Table 3 Thickness test data for multiple samples

[0058] Table 3 (Continued) - Thickness Test Data for Multiple Samples

[0059] Table 3 (Continued) - Thickness Test Data for Multiple Samples

[0060] Table 3 (Continued) - Thickness Test Data for Multiple Samples

[0061] Table 4. Roughness test data of multiple samples

[0062] Continued from Table 4: Roughness test data for multiple samples

[0063] Continued from Table 4: Roughness test data for multiple samples

[0064] Continued from Table 4: Roughness test data for multiple samples

[0065] Continued from Table 4: Roughness test data for multiple samples

[0066] As can be seen from Tables 3 and 4, the film thickness uniformity and roughness uniformity are high at all locations of the immersion-thinned samples.

[0067] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A thinning method characterized by, The thinning method is used for thinning the inconel strip, and the thinning method comprises: Driving the inconel strip to pass through the soaking tank at a set speed and a set tension, the soaking tank being provided with a thinning liquid, and the set tension being between 20 N and 80 N; A replenishing assembly is used to replenish the soaking tank with a thinning solution, and to drain the soaking tank, the thinning solution including a thinning agent and a solvent, such that the thinning agent to solvent ratio of the thinning solution in the soaking tank is maintained between 1.4 g / cm 3 and 1.6 g / cm 3 , the temperature of the thinning solution in the soaking tank being maintained between 35°C and 55°C.

2. The thinning method according to claim 1, characterized by, The soaking tank is supplemented with the thinning liquid by using a liquid supplementing assembly, which comprises: The soaking tank is supplemented with the thinning liquid by using a first liquid supplementing assembly and a second liquid supplementing assembly, the first liquid supplementing assembly and the second liquid supplementing assembly being oppositely and spacedly arranged, the spacing being for the inconel strip to pass through, the first liquid supplementing assembly being located at the top of the inconel strip, and the second liquid supplementing assembly being located at the bottom of the inconel strip, the liquid supplementing openings of the first liquid supplementing assembly and the second liquid supplementing assembly being respectively directed to the two surfaces of the inconel strip, and the sum of the liquid supplementing amounts of the first liquid supplementing assembly and the second liquid supplementing assembly being greater than the liquid discharging amount of the soaking tank, wherein the liquid supplementing amount of the first liquid supplementing assembly is greater than or equal to the liquid supplementing amount of the second liquid supplementing assembly.

3. The thinning method according to claim 2, characterized by, The difference between the liquid supplementing amount provided by the liquid supplementing assembly per unit time and the liquid discharging amount of the soaking tank is between 1000 L / min and 1500 L / min.

4. The thinning method of claim 1, wherein The temperature of the thinning liquid provided by the liquid supplementing assembly is between 40 DEG C and 55 DEG C, and the acid reduction potential of the thinning liquid in the soaking tank is between 400 mV and 600 mV.

5. The thinning method of claim 1, wherein The thinning agent comprises ferric chloride and hydrochloric acid, the content of the hydrochloric acid in the thinning liquid is between 3 g / L and 12 g / L, the content ratio of the ferric chloride in the thinning liquid is between 40% and 49%, and the electrode difference of the ferric chloride in the thinning liquid is between 45 and 90.

6. The thinning method according to any one of claims 1 to 5, characterized by, In the step of driving the inconel strip to pass through the soaking tank at a set speed and a set tension, the set speed of the inconel strip is between 0.5 m / min and 5 m / min.

7. The thinning method according to any one of claims 1 to 5, characterized by, Driving the inconel strip to pass through the soaking tank at a set speed and a set tension, which comprises: The inconel strip is transmitted by using a transmission device, the transmission device comprising a speed adjusting module for adjusting the transmission speed of the inconel strip, wherein The inconel strip is transmitted at a first speed for a set distance; The inconel strip is transmitted at a second speed by using the speed adjusting module, wherein the first speed is greater than the second speed.

8. A thinning system characterized by, The thinning system comprises: A transmission device and a thinning device, the thinning device comprising a liquid supplementing assembly and a soaking tank, the transmission device being used for driving the inconel strip to pass through the soaking tank at a set tension and a set speed, the set tension being between 20 N and 80 N, the soaking tank being used for containing the thinning liquid and being capable of discharging liquid, and the liquid supplementing assembly being used for supplementing the soaking tank with the thinning liquid.

9. The thinning system of claim 8, wherein, The liquid supplementing assembly comprises a first liquid supplementing assembly and a second liquid supplementing assembly, the first liquid supplementing assembly and the second liquid supplementing assembly being oppositely and spacedly arranged, the spacing being for the inconel strip to pass through, the liquid supplementing openings of the first liquid supplementing assembly and the second liquid supplementing assembly being respectively directed to the two surfaces of the inconel strip, and the first liquid supplementing assembly and the second liquid supplementing assembly respectively supplementing the soaking tank on the two surface sides of the inconel strip.

10. The thinning system of claim 8 or 9, wherein, The soaking groove is provided with a plurality of first liquid blocking wheels and a plurality of conveying shaft rods, at least one of the first liquid blocking wheels and at least one of the conveying shaft rods are oppositely arranged along the height direction of the soaking groove, and the first liquid blocking wheel and the conveying shaft rod have a space therebetween for the passage of the inconel strip.

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