Roll-to-roll flexible substrate continuous chemical plating production line

Abstract

The utility model discloses a roll-to-roll flexible substrate continuous chemical plating production line. The roll-to-roll flexible substrate continuous chemical plating production line comprises an unwinding device, an oil removal section, a rust removal section, a plating layer section, an anti-oxidation section, a drying section and a winding device which are connected in sequence, a to-be-plated coiled material is unwound by the unwinding device in a vertical mode, sequentially passes through the oil removal section, the rust removal section, the plating layer section, the anti-oxidation section and the drying section and then is wound by the winding device in a vertical mode. The problems that when traditional flexible materials horizontally pass through a groove body in a production area, the concentration of solutions is not uniform, the treatment effects of the upper surface and the lower surface are large in difference, and the middle of a circuit board droops and deforms are solved, a driving roller is not arranged, and the problem that the surface of a coiled material is abraded due to friction between the driving roller and the coiled material can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroless plating, in particular to a roll-to-roll continuous electroless plating production line for flexible substrates. Background Art

[0002] Electroless plating is a technology that can form a metal coating on the surface of metals, semiconductors or non-metals without external current, relying on the reducing agent in the solution to achieve the autocatalytic deposition of metal ions on the surface of the workpiece. Due to its characteristics of low energy consumption and uniform and dense coating, this technology has developed rapidly in the electronics industry, especially the technologies of electroless nickel plating, copper plating, cobalt plating, platinum group metal plating and their multi-element alloys. In the fields of rigid aluminum substrates and flexible aluminum substrates, it has attracted much attention due to its low cost and high performance.

[0003] However, the existing electroless plating technology mainly targets individual workpieces, and the production process is not continuous. For the continuous electroless plating solution for coils, a horizontal conveying production line is generally used. However, when the coil passes through the pretreatment tank, water washing tank and electroless plating tank, driving rollers are required to make the coil turn up and down. This process involves multiple tank positions, resulting in a large number of required driving rollers and increased technical complexity. More importantly, the direct contact between the driving roller and the coil is likely to cause damage to the coil. Therefore, optimizing this technology to improve production efficiency and reduce material damage has become an important topic in the industry. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a roll-to-roll continuous electroless plating production line for flexible substrates to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following scheme:

[0006] A roll-to-roll continuous electroless plating production line for flexible substrates includes an unwinding device, a degreasing section, a rust removal section, a plating section, an anti-oxidation section, a drying section and a winding device connected in sequence;

[0007] The coil to be plated is released by the unwinding device and then passes through the degreasing section, the rust removal section, the plating section, the anti-oxidation section and the drying section in sequence and is then wound up by the winding device;

[0008] The degreasing section is used to remove impurities on the surface of the coil to be plated;

[0009] The rust removal section is used to remove surface defects of the coil to be plated after passing through the degreasing section;

[0010] The plating section is used to perform plating treatment on the surface of the coil to be plated after passing through the rust removal section;

[0011] The anti-oxidation section is used to perform an anti-oxidation coating treatment on the surface of the to-be-plated coil after passing through the plating section;

[0012] The drying section is used to perform a heating treatment on the surface of the to-be-plated coil after passing through the anti-oxidation section.

[0013] Furthermore, the plating section includes a first plating section, a second plating section, and a third plating section connected in sequence;

[0014] The first plating section is used to perform a priming treatment on the surface of the to-be-plated coil after passing through the rust-removing section to generate a base layer;

[0015] The second plating section is used to form an intermediate coating on the surface of the base layer of the to-be-plated coil after passing through the first plating section;

[0016] The third plating section is used to form a third coating on the surface of the intermediate coating of the to-be-plated coil after passing through the second plating section.

[0017] Furthermore, a water washing section A is provided between the rust-removing section and the first plating section, a water washing section B is provided between the first plating section and the second plating section, a water washing section C is provided between the second plating section and the third plating section, and a water washing section D is provided between the third plating section and the anti-oxidation section.

[0018] Furthermore, the degreasing section, the rust-removing section, the water washing section A, the first plating section, the water washing section B, the second plating section, the water washing section C, the third plating section, the water washing section D, the anti-oxidation section, and the drying section all include: a lower tank body, an upper tank body, and a self-priming pump;

[0019] The upper tank body is arranged above the lower tank body, and the lower tank body is communicated with the upper tank body through the self-priming pump;

[0020] A reflux hole is opened at the inner bottom end of the upper tank body, and the upper tank body is communicated with the lower tank body through the reflux hole;

[0021] Feeding slits are correspondingly opened on the opposite side walls of the upper tank body.

[0022] Furthermore, a heating stirrer and a thermometer are arranged on the lower tank body, and the heating and stirring end of the heating stirrer and the detection end of the thermometer respectively extend into the interior of the lower tank body;

[0023] A liquid level gauge is installed on the side wall of the upper tank body.

[0024] Furthermore, the lower tank body is connected with a filter through a filter pump.

[0025] Furthermore, air knives are also arranged inside the upper tank bodies of the water washing section A, the water washing section B, the water washing section C, the third plating section, and the water washing section D.

[0026] As can be seen from the above technical solutions, compared with the prior art, the beneficial effects of the present utility model are as follows:

[0027] 1. The present utility model adopts a vertical winding and unwinding method for transporting the coil material, which solves the problems that traditional flexible materials are prone to uneven solution concentration, large difference in surface treatment effects between the upper and lower surfaces, and sagging and deformation in the middle of the circuit board when passing horizontally through the tank body of the production area. Moreover, without driving rollers, the problem of wear on the surface of the coil material caused by friction between the driving rollers and the coil material can be avoided.

[0028] 2. The main structures of the unit tanks in each process section are basically the same, and an innovative design of upper and lower tanks is adopted, which greatly reduces the development cost of the entire production line. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is the process flow chart of the roll-to-roll flexible substrate continuous electroless plating production line in the embodiment of the present utility model;

[0031] Figure 2 It is the overall equipment assembly drawing of the roll-to-roll flexible substrate continuous electroless plating production line in the embodiment of the present utility model;

[0032] Figure 3 It is the axonometric drawing of each process section in the embodiment of the present utility model;

[0033] Figure 4 It is the front view of each process section in the embodiment of the present utility model;

[0034] Figure 5 It is the top view of each process section in the embodiment of the present utility model;

[0035] Figure 6 It is the side view of each process section in the embodiment of the present utility model.

[0036] Explanation of the Reference Numerals in the Drawings:

[0037] 1. Unwinding device; 2. Degreasing section; 3. Rust removal section; 4. Water washing section A; 5. First plating section; 6. Water washing section B; 7. Second plating section; 8. Water washing section C; 9. Third plating section; 10. Water washing section D; 11. Anti-oxidation section; 12. Drying section; 13. Rewinding device; 14. Feeding slit; 15. Upper tank body; 16. Filter; 17. Air knife; 18. Liquid level gauge; 19. Self-priming pump; 20. Heating stirrer; 21. Lower tank body; 22. Thermometer; 23. Return flow hole; 24. Filter pump; 25. Coil to be plated. Detailed implementation manners

[0038] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0040] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0041] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] In order to better understand the purpose, structure and function of the present utility model, the following further describes the present utility model in detail with reference to the drawings.

[0043] Embodiment

[0044] Refer to Figure 1-2As shown in the figure, a roll-to-roll flexible substrate continuous electroless plating production line provided by an embodiment includes an unwinding device 1, a degreasing section 2, a rust removal section 3, a plating section, an anti-oxidation section 11, a drying section 12, and a winding device 13 that are connected in sequence;

[0045] The coil to be plated 25 is unwound vertically by the unwinding device 1 and then passes through the degreasing section 2, the rust removal section 3, the plating section, the anti-oxidation section 11, and the drying section 12 in sequence, and is then wound vertically by the winding device 13;

[0046] The degreasing section 2 is used to remove impurities on the surface of the coil to be plated 25;

[0047] The rust removal section 3 is used to remove surface defects of the coil to be plated 25 after passing through the degreasing section 2;

[0048] The plating section is used to perform plating treatment on the surface of the coil to be plated 25 after passing through the rust removal section 3;

[0049] The anti-oxidation section 11 is used to perform anti-oxidation coating treatment on the surface of the coil to be plated 25 after passing through the plating section;

[0050] The drying section 12 is used to perform temperature-raising treatment on the surface of the coil to be plated 25 after passing through the anti-oxidation section 11.

[0051] It should be noted that the plating section includes a first plating section 5, a second plating section 7, and a third plating section 9 that are connected in sequence;

[0052] The first plating section 5 is used to perform a priming treatment on the surface of the coil to be plated 25 after passing through the rust removal section 3 to generate a base layer;

[0053] The second plating section 7 is used to form an intermediate plating layer on the surface of the base layer of the coil to be plated 25 after passing through the first plating section 5;

[0054] The third plating section 9 is used to form a third plating layer on the surface of the intermediate plating layer of the coil to be plated 25 after passing through the second plating section 7.

[0055] In addition, a water washing section A 4 is provided between the rust removal section 3 and the first plating section 5, a water washing section B 6 is provided between the first plating section 5 and the second plating section 7, a water washing section C 8 is provided between the second plating section 7 and the third plating section 9, and a water washing section D 10 is provided between the third plating section 9 and the anti-oxidation section 11.

[0056] Refer to Figure 3-6 , the degreasing section 2, the rust removal section 3, the water washing section A 4, the first plating section 5, the water washing section B 6, the second plating section 7, the water washing section C 8, the third plating section 9, the water washing section D 10, the anti-oxidation section 11, and the drying section 12 all include: a lower tank body 21, an upper tank body 15, and a self-priming pump 19;

[0057] The upper tank body 15 is arranged above the lower tank body 21, and the lower tank body 21 is communicated with the upper tank body 15 through a self-priming pump 19;

[0058] A reflux hole is opened at the inner bottom end of the upper tank body 15, and the upper tank body 15 is communicated with the lower tank body 21 through the reflux hole;

[0059] Feeding slits 14 are correspondingly opened on the opposite side walls of the upper tank body 15.

[0060] Specifically, a heating stirrer 20 and a thermometer 22 are arranged on the lower tank body 21, and the heating and stirring end of the heating stirrer 20 and the detection end of the thermometer 22 respectively extend into the lower tank body 21;

[0061] A liquid level gauge 18 is installed on the side wall of the upper tank body 15.

[0062] Specifically, the lower tank body 21 is connected with a filter 16 through a filter pump 24.

[0063] It should be noted that air knives 17 are further arranged inside the upper tank body 15 of the water washing section A 4, the water washing section B 6, the water washing section C 8, the third plating section 9, and the water washing section D 10.

[0064] It should be noted that the specific functions of each process section are as follows:

[0065] Unwinding device 1: Release coils such as plastic films, metal foils, and flexible printed circuit boards vertically with uniform force and speed.

[0066] Degreasing section 2: Remove impurities such as grease, fingerprints, residual glue, and debris generated during the processing on the surface of the coil.

[0067] Rust removal section 3: Remove surface defects such as metal oxides, rust skins, and stains on the surface of the coil.

[0068] Four water washing sections 4: Remove the solution of the previous process section remaining on the coil to prevent it from mixing into the next process section.

[0069] Air knife 17: Block the liquid during the walking of the coil through air with a certain flow rate and flow volume to prevent it from mixing into the next process section and dry the surface of the coil.

[0070] First plating section 5: According to requirements, apply a primer on the surface of the coil to generate a base layer, realize the plating property of the coil, and improve the bonding force of the subsequent second plating layer.

[0071] Second plating section 7: Form an intermediate plating layer on the surface of the base layer of the coil through a displacement reaction or a catalytic reaction;

[0072] The third plating section 9: A third plating layer is formed on the middle plating surface of the coil through displacement reaction or catalytic reaction to achieve multiple functions such as conductivity, abrasion resistance, aesthetics, and anti-magnetism of the coil.

[0073] The anti-oxidation section 11: An anti-oxidation coating treatment is carried out on the surface of the third plating layer of the coil.

[0074] The drying section 12: The surface temperature of the coil is raised, and during the process of curing the anti-oxidation coating, residual solvents, moisture and other impurities on the surface of the coil are removed, so that the coil reaches a state where it can be wound up.

[0075] The winding device 13: Coils such as plastic films, metal foils, flexible printed circuit boards, etc. are recycled vertically with uniform force and speed and wound up neatly for shipment.

[0076] The lower tank 21: Stores various solutions and cleaning water required for each process section such as degreasing, rust removal, water washing, electroless plating, etc., and realizes the control of process parameters such as the temperature, concentration and pH value of the bath solution and the replenishment of the chemical solution.

[0077] The upper tank 15: Stores the bath solution pumped from the lower tank 21 and forms an immersion environment to realize the pretreatment, electroless plating and surface cleaning of the coil; the excess bath solution returns to the lower tank 21 through the reflux hole 23 at its bottom.

[0078] The filter 16: Filters out impurities such as metal debris, residues, scale and precipitates that may exist in the bath solution to prevent the bath solution from deteriorating.

[0079] It should be noted that a base is also provided on the production line to fix the entire production line.

[0080] Specifically, the coil to be plated 25 can be a base material wound by a plastic film, a metal foil, a flexible printed circuit board, etc.; the production line of the present utility model adopts a vertical transmission winding and unwinding mode, and each process section adopts the method of using the upper tank 15 for treatment and the lower tank 21 for storing the liquid, and the structure and components of each process section unit tank are basically the same. The control of process parameters such as the temperature, concentration and pH value of the bath solution and the replenishment of the chemical solution are realized in the lower tank 21; the bath solution is pumped into the upper tank 15 through the self-priming pump 19 and pipelines to realize the surface treatment of the coil. After the coils such as plastic films, metal foils, flexible printed circuit boards to be processed are put on the line, through multiple steps of processes such as unwinding - degreasing - rust removal - water washing - the first plating layer - water washing - the second plating layer - water washing - the third plating layer - water washing - anti-oxidation - drying - winding, the metal plating treatment on the surface of the coil is finally realized.

[0081] In this text, specific examples are used to elaborate on the principle and implementation of the present utility model. The description of the above embodiments is only for helping to understand the method and its core idea of the present utility model; meanwhile, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A roll-to-roll flexible substrate continuous chemical plating production line, characterized in that: It includes an unwinding device, an oil removal section, a rust removal section, a coating section, an anti-oxidation section, a drying section and a winding device which are connected in sequence; The coil to be plated is unrolled vertically by the unwinding device and then sequentially passes through the degreasing section, the rust removal section, the coating section, the anti-oxidation section, and the drying section before being reeled vertically by the reeling device; The degreasing section is used to remove impurities on the surface of the coil to be plated; The rust removal section is used to remove surface defects of the coil to be plated after passing through the degreasing section; The coating section is used to perform coating treatment on the surface of the coil to be plated after the rust removal section; The anti-oxidation section is used to perform an anti-oxidation coating treatment on the surface of the coil to be plated after passing through the coating section; The drying section is used to perform a temperature treatment on the surface of the coil to be plated after passing through the anti-oxidation section.

2. A roll-to-roll flexible substrate continuous chemical plating production line according to claim 1, characterized in that: The plating section comprises a first plating section, a second plating section and a third plating section connected in sequence; The first coating section is used to perform a primer treatment on the surface of the coiled material to be plated after the rust removal section to generate a base layer; The second coating section is used to form an intermediate coating on the surface of the base layer of the coil to be coated after passing through the first coating section; The third coating section is used to form a third coating on the intermediate coating surface of the coil to be coated after passing through the second coating section.

3. A roll-to-roll flexible substrate continuous chemical plating production line according to claim 2, characterized in that: A water washing section A is arranged between the rust removal section and the first coating section, a water washing section B is arranged between the first coating section and the second coating section, a water washing section C is arranged between the second coating section and the third coating section, and a water washing section D is arranged between the third coating section and the anti-oxidation section.

4. The roll-to-roll flexible substrate continuous chemical plating production line according to claim 3, characterized in that: The degreasing section, rust removal section, water washing section A, first coating section, water washing section B, second coating section, water washing section C, third coating section, water washing section D, anti-oxidation section and drying section all include: a lower tank body, an upper tank body and a self-priming pump; The upper tank body is arranged above the lower tank body, and the lower tank body is connected with the upper tank body through the self-priming pump; A reflux hole is provided at the inner bottom end of the upper tank body, and the upper tank body is connected with the lower tank body through the reflux hole; The two opposite side walls of the upper tank body are provided with corresponding material feeding slits.

5. The roll-to-roll flexible substrate continuous chemical plating production line according to claim 4, characterized in that: The lower tank body is provided with a heating stirrer and a thermometer, and the heating stirring end of the heating stirrer and the detection end of the thermometer extend into the interior of the lower tank body respectively; A liquid level meter is installed on the side wall of the upper tank body.

6. The roll-to-roll flexible substrate continuous chemical plating production line according to claim 4, characterized in that: The lower tank body is connected with a filter through a filter water pump.

7. The roll-to-roll flexible substrate continuous chemical plating production line according to claim 4, characterized in that: Air knives are also arranged inside the upper tank bodies of the water washing section A, the water washing section B, the water washing section C, the third coating section and the water washing section D.

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