High-precision size control nickel plate electroforming method and equipment

Abstract

The invention discloses a high-precision size control nickel plate electroforming method and equipment, and relates to the field of plate making in the printing and packaging anti-counterfeiting industry, and the nickel plate electroforming method comprises the following steps: step 1, base plate pretreatment, step 2, pattern positioning and step 3, electroforming operation; in order to solve the problem that the nickel plate is easy to twist or pattern deviation in the same direction in the prior art, the nickel plate electroforming size precision is remarkably improved by changing the main and auxiliary grooves into left and right positions, optimizing the groove liquid circulation mode, enhancing the conductivity, specifically adjusting the pattern position and other technical means, the problems of plate twisting and pattern deviation are effectively solved, and the nickel plate electroforming quality is improved. And the method is particularly suitable for the fields of cigarette packet manufacturing and the like with extremely high positioning precision requirements.

Description

Technical Field

[0001] This invention relates to the field of plate-making technology in the printing, packaging, and anti-counterfeiting industry, specifically to a method and equipment for high-precision dimensional control of nickel plate electroforming. Background Technology

[0002] Nickel plates are commonly used and crucial components in various printing and packaging industries, especially in cigarette packaging manufacturing, where extremely high precision in paper positioning is required. The precision of paper positioning dimensions further demands even higher standards for nickel plate positioning accuracy. Currently, nickel plates are frequently used in various printing and packaging industries, particularly in cigarette packaging manufacturing where the precision requirements for paper positioning are even higher. The high precision of paper positioning dimensions correspondingly increases the requirements for nickel plate positioning accuracy. In the current electroforming process of nickel plates, problems such as plate twisting or deviations in the same direction of the pattern frequently occur, seriously affecting product quality. Therefore, a high-precision dimensional control method and equipment for nickel plate electroforming are needed.

[0003] Based on this, a search on the patent website revealed a method for high-precision dimensional control of nickel plate electroforming according to Chinese patent application number 202310334575.6, which includes setting the horizontal height of the upper horizontal inner corner of the nickel plate master to be close to the highest liquid level of nickel beads in the electroplating bath, and setting the horizontal height of the lower horizontal inner corner of the nickel plate master to be vertically below the electroplating bath. It can be seen that the above-mentioned patent has the following shortcomings: In the traditional electroforming method, the front and rear layout of the main and auxiliary tanks causes the flow direction of the bath liquid to be mismatched with the stress distribution of nickel ion deposition, which easily leads to plate twisting and misalignment of the same direction pattern. Due to uneven conductivity and disordered bath liquid circulation, the traditional method often has problems such as large deviation of nickel layer thickness and low deposition efficiency, which reduces the quality of nickel layer and production efficiency.

[0004] To address the aforementioned issues, the equipment has been modified to better adjust for plate twisting or deviation. A high-precision dimensional control method and equipment for nickel plate electroforming is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a method and equipment for high-precision dimensional control of nickel plate electroforming. By using this device, the problems in the prior art are solved.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-precision dimensional control method for nickel plate electroforming, comprising the following steps: Step 1: Pre-treatment of the base plate: The surface of the base plate to be electroformed is degreased, polished and activated; Step 2, Pattern Positioning: Measure the twisting direction and deviation value of the pattern on the base plate. When the right edge of the base plate is used as the reference for measurement, if the pattern on the left side has a downward twisting deviation of 0.1-0.5mm, fix the base plate with the positioning component so that the center area of ​​the downward twisted pattern on the left side is aligned with the center line of the sub-groove. Step 3, Electroforming Operation: Start the water pump to form a circular flow loop in the bath, and simultaneously connect the power supply, controlling the current density to 2-5A / dm², the electroforming temperature to 50-55℃, and the electroforming time to 8-12 hours; During the electroforming process, apply directional stress to the nickel ion deposition process on the substrate surface using upward jet water flow and circular circulating water flow, so that the nickel layer thickness in the corresponding area of ​​the lower twist pattern on the left is 0.02-0.05mm thicker than that in the reference area on the right.

[0007] In step three, the pH value of the bath solution is 3.8-4.2, and the nickel ion concentration in the bath solution is 80-100 g / L.

[0008] In step two, when the downward twist deviation of the pattern on the left side is greater than 0.5mm, a compensation shim with a thickness of 0.03-0.08mm is pasted on the left edge of the base plate.

[0009] Electroforming is performed using a nickel plate electroforming equipment. When measuring with the right side as the reference, and twisting the pattern on the left side downwards, the pattern on the left side is positioned opposite the secondary groove when the plate is placed in the groove. Under the impact of the water flow below and the action of the circulating water flow, the stress on the upper nickel layer on the twisted side increases, reducing the size of the twisted plate.

[0010] The tank liquid circulation is driven by a water pump, and a ring flow is formed by the upward holes in the pipes on the lower side of the main tank and the parallel holes in the partition plate between the main and auxiliary tanks.

[0011] A high-precision dimensional control nickel plate electroforming equipment includes a main tank, a secondary tank, pipes, a water pump, a baffle plate, a titanium basket bag for the anode, and a cathode. The main tank and the secondary tank are arranged side by side in the horizontal direction, and the bottoms of the main tank and the secondary tank are connected by a circulation pipe. At least three injection holes are opened on the circulation pipe on the lower side of the main tank. The axis of the injection holes is set at an angle of 60°-90° with the horizontal plane and is used to spray upward water into the main tank.

[0012] The main tank and the auxiliary tank are arranged side-by-side, replacing the traditional front-to-back arrangement. The pipe on the lower side of the main tank has holes facing upwards to create an upward-flowing water flow. A baffle is vertically installed between the adjacent side walls of the main tank and the auxiliary tank. The baffle has at least five guide holes with their axes parallel to the vertical side of the titanium basket bag in the anode assembly. A water pump is installed on the circulation pipe, driving the tank liquid to flow back to the circulation pipe sequentially through the spray hole on the lower side of the main tank, the inside of the main tank, the guide holes of the baffle, and the inside of the auxiliary tank, forming a ring-shaped flow loop parallel to the side of the titanium basket bag. The cathode assembly includes a cathode plate and a conductive wire. One end of the conductive wire is connected to the top edge of the cathode plate, and the other end is connected to the negative terminal of an external power source. The diameter of the conductive wire is 0.5-1 mm and its conductivity is ≥98% IACS.

[0013] The partition between the main tank and the auxiliary tank has holes that are parallel to the titanium basket bag of the anode. Under the action of the water pump, the tank liquid is circulated, forming a ring flow parallel to the titanium plate. Conductive wires are provided at the cathode to increase conductivity and promote nickel ion deposition.

[0014] The diameter of the injection holes is 8-12mm, and the distance between two adjacent injection holes is 15-20cm; the diameter of the guide holes is 15-20mm, and the distance between two adjacent guide holes is 20-30cm. The anode assembly includes a titanium basket bag and an anode plate. The titanium basket bag is vertically installed on the inner wall of the main tank away from the secondary tank. The anode plate is embedded in the titanium basket bag, and the surface of the anode plate is parallel to the plane where the guide holes of the partition are located.

[0015] The nickel plate electroforming equipment also includes a positioning component, which includes a scale set on the top edge of the main tank and the auxiliary tank, and a positioning clamp slidably connected to the scale. The positioning clamp is used to fix the base plate to be electroformed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The technical solution of this invention mainly includes two parts: equipment modification and control method. In terms of equipment modification, the traditional front-to-back position of the main and auxiliary tanks is changed to a left-to-right position. A hole is opened in the pipe on the lower side of the main tank, with the hole facing upward to form an upward water flow. A hole is opened in the partition between the main and auxiliary tanks, and the hole is parallel to the titanium basket bag of the anode. Under the action of the water pump, the tank liquid is circulated, forming a ring flow parallel to the titanium plate. A conductive wire is added at the cathode to increase conductivity and allow nickel ions to be deposited better. In terms of control method, when measuring with the right side as the reference, when the pattern on the left side is twisted downward, when the plate is placed in the tank, it is ensured that the twisted pattern on the left side is on the opposite side of the auxiliary tank. In this way, under the impact of the water flow below and the action of the circulating water flow, the stress on the nickel layer above the twisted plate side is large, so that the size of the twisted plate is smaller. By changing the main and auxiliary tanks to a left-right position, the tank layout is altered, creating favorable conditions for subsequent water circulation and pattern adjustment. The upward-facing holes in the lower pipe of the main tank create an upward-flowing water flow, which, combined with the openings in the partition plate between the main and auxiliary tanks, forms a ring-shaped flow of liquid parallel to the titanium plate. This results in a more uniform distribution of the liquid, promoting uniform nickel ion deposition and reducing pattern deviations caused by uneven liquid distribution. Adding conductive lines at the cathode improves conductivity, further enhancing nickel ion deposition and improving the quality of the nickel plate. The method for controlling plate twisting utilizes the force of the water flow and the effect of circulating water to adjust the stress in the nickel layer, effectively reducing twisting and significantly improving the dimensional accuracy of the nickel plate. This meets the industry's demand for high positioning accuracy. This invention aims to solve the problems of plate twisting or unidirectional pattern deviation during plate making by modifying equipment and optimizing control methods to better adjust twisting or deviation and improve the dimensional accuracy of the nickel plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a high-precision dimensional control method for electroforming nickel plates according to the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0020] Combination Figure 1 A high-precision dimensional control method and equipment for nickel plate electroforming includes the following steps: Step 1, base plate pretreatment: the surface of the base plate to be electroformed is degreased, polished, and activated; Step 2, pattern positioning: the twist direction and deviation value of the pattern on the base plate are measured. When the right edge of the base plate is used as a reference, and the left pattern has a downward twist deviation of 0.1-0.5mm, the base plate is fixed by the positioning component so that the center area of ​​the left downward twist pattern is aligned with the center line of the sub-tank; Step 3, electroforming operation: the water pump is started to form a circular flow loop of the tank liquid, and the power is turned on at the same time. The current density is controlled at 2-5A / dm², the electroforming temperature is 50-55℃, and the electroforming time is 8-12 hours; during the electroforming process, the upward jet water flow and the circular circulating water flow are used to apply directional stress to the nickel ion deposition process on the surface of the base plate, so that the nickel layer thickness of the corresponding area of ​​the left downward twist pattern is 0.02-0.05mm thicker than that of the right reference area.

[0021] The present invention will be further described below with reference to embodiments.

[0022] In step three, the pH value of the bath solution is 3.8-4.2, and the nickel ion concentration in the bath solution is 80-100g / L. In step two, when the downward twisting deviation of the left pattern is >0.5mm, a compensation shim with a thickness of 0.03-0.08mm is pasted on the left edge of the base plate. Electroforming is performed using nickel plate electroforming equipment. When the right side is used as the reference for measurement, when the left pattern twists downward, the pattern twisted downward is placed on the opposite side of the secondary tank when the plate is placed in the tank. Under the impact of the water flow below and the action of the circulating water flow, the stress of the nickel layer on the twisted side increases, reducing the size of the twisted plate. The bath solution circulation is driven by a water pump, and a ring flow is formed by the upward holes of the pipe on the lower side of the main tank and the parallel holes of the partition plate between the main and secondary tanks.

[0023] A high-precision dimensional control nickel plate electroforming equipment includes a main tank, a secondary tank, pipes, a water pump, a baffle plate, a titanium basket bag for the anode, and a cathode. The main tank and secondary tank are arranged side-by-side horizontally, and their bottoms are connected by a circulation pipe. At least three injection holes are provided on the circulation pipe below the main tank. The axes of the injection holes are set upwards at a 60-90° angle to the horizontal plane to spray upward-flowing water into the main tank. The main tank and secondary tank are arranged side-by-side, replacing the traditional front-and-back arrangement. The pipe below the main tank has holes facing upwards to create an upward-rushing water flow. The baffle plate is vertical. The anode assembly is positioned between the adjacent side walls of the main tank and the auxiliary tank. The partition plate has at least 5 guide holes, the axis of which is parallel to the vertical side of the titanium basket bag in the anode assembly. A water pump is installed on the circulation pipe, driving the tank liquid to flow back to the circulation pipe sequentially through the spray hole on the lower side of the main tank, the inside of the main tank, the guide holes of the partition plate, and the inside of the auxiliary tank, forming an annular flow loop parallel to the side of the titanium basket bag. The cathode assembly includes a cathode plate and a conductive wire. One end of the conductive wire is connected to the top edge of the cathode plate, and the other end is connected to the negative terminal of an external power supply. The diameter of the conductive wire is 0.5-1 mm and the conductivity is ≥98% IACS.

[0024] The partition between the main tank and the auxiliary tank has holes parallel to the titanium basket bag of the anode. Under the action of the water pump, the tank liquid circulates, forming a ring flow parallel to the titanium plate. Conductive wires are provided at the cathode to increase conductivity and promote nickel ion deposition. The diameter of the injection holes is 8-12mm, and the distance between two adjacent injection holes is 15-20cm. The diameter of the guide holes is 15-20mm, and the distance between two adjacent guide holes is 20-30cm. The anode assembly includes a titanium basket bag and an anode plate. The titanium basket bag is vertically set on the inner wall of the main tank away from the auxiliary tank. The anode plate is embedded in the titanium basket bag, and the surface of the anode plate is parallel to the plane of the guide holes of the partition. The nickel plate electroforming equipment also includes a positioning assembly, which includes a scale set on the top edge of the main tank and the auxiliary tank, and a positioning clamp that can be slidably connected to the scale. The positioning clamp is used to fix the base plate to be electroformed.

[0025] In practical applications, the nickel plate electroforming method of the present invention and the corresponding equipment are implemented according to the following steps: Step 1: Modify the electroforming equipment by setting the main tank and auxiliary tank in a left-right position, replacing the traditional front-back layout.

[0026] Step 2: Make upward-facing holes in the pipes on the lower side of the main tank to ensure that the water flow can impact upwards.

[0027] Step 3: Make holes in the partition between the main tank and the auxiliary tank, parallel to the anode, for the titanium basket bag, and install a water pump so that the tank solution can circulate through these holes under the action of the water pump, forming a ring flow parallel to the titanium plate.

[0028] Step 4: Connect a conductive wire to the cathode to increase conductivity.

[0029] Step 5: When the left-side pattern is found to be twisted downwards when measured with the right side as the reference, place the twisted left-side pattern on the opposite side of the sub-slot during the plate mounting and slotting operation.

[0030] Step Six: Start the equipment for electroforming. During the electroforming process, the upward-facing holes in the pipes on the lower side of the main tank create an upward-flowing water stream. Simultaneously, under the action of the water pump, the bath liquid flows in a ring parallel to the titanium plate through the holes in the partition plate between the main and auxiliary tanks. Under the action of these water streams, the stress on the upper nickel layer on the twisted plate side increases, thereby reducing the size of the twisted plate.

[0031] Example 1: Electroforming of nickel plates with slight twist (deviation 0.2mm)

[0032] (1) Equipment parameters: Main tank dimensions: Length 1200mm × Width 800mm × Height 600mm; Sub-channel dimensions: 1200mm (length) × 600mm (width) × 600mm (height); distance between main and sub-channels: 300mm. The circulation pipe has a diameter of 50mm. Five spray holes with a diameter of 10mm are opened on the lower side of the main tank pipe. The spacing between adjacent holes is 18cm, and the hole axis is at 90° to the horizontal plane. The partition is 10mm thick and has 8 flow guide holes with a diameter of 18mm. The spacing between adjacent holes is 25cm and the hole axis is parallel to the side of the titanium basket bag. The water pump has a power of 1.5kW and a flow rate of 20m³ / h. The conductive wire is made of 0.8mm diameter copper wire, and the cathode plate is made of 316L stainless steel.

[0033] (2) Electroforming steps: S1. Base plate pretreatment: Select a copper base plate with a thickness of 0.3mm, and perform alkaline degreasing (50℃, 5min), electrolytic polishing (current density 3A / dm², 3min), hydrochloric acid activation (10% concentration, 1min), and then dry it; S2. Pattern positioning: Using the right edge of the base plate as a reference, the downward twist deviation of the pattern on the left side is measured to be 0.2mm. The base plate is fixed by the positioning clamp to align the center of the downward twist pattern on the left side with the center line of the sub-groove. S3. Electroforming operation: The bath composition is 280 g / L nickel sulfate, 45 g / L nickel chloride, 35 g / L boric acid, pH 4.0, nickel ion concentration 90 g / L; the current density is controlled at 3 A / dm², the electroforming temperature is 52℃, and the electroforming time is 10 hours. During the process, the liquid in the tank impacts upward through the spray holes at a velocity of 0.8 m / s, while simultaneously forming a circular circulation through the guide holes at a velocity of 0.5 m / s.

[0034] (3) Experimental results: The deviation of the left side of the nickel plate was reduced from 0.2 mm to 0.03 mm, and the uniformity error of the nickel layer thickness was ≤2%, which met the high precision requirements of cigarette packaging printing.

[0035] Example 2: Electroforming of nickel plates with moderate twist (deviation 0.4 mm)

[0036] (1) Equipment parameters

[0037] The main tank and auxiliary tank have the same dimensions as in Example 1, and the circulation pipe has a diameter of 60mm; Six injection holes are opened on the lower side of the main tank pipe. The holes are 12mm in diameter and 20cm apart. The axis of the holes is at 75° to the horizontal plane. The partition has 10 flow guide holes with a diameter of 20mm and a spacing of 22cm. The water pump has a power of 2.2kW and a flow rate of 25m³ / h. The conductive wire is a 1.0 mm diameter copper wire, and the cathode plate is made of the same material as in Example 1.

[0038] (2) Electroforming steps

[0039] S1. Base plate pretreatment: Same as in Example 1, except for ultrasonic cleaning; S2. Pattern positioning: The left side pattern has a downward twist deviation of 0.4mm. The base plate is fixed by the positioning component to align the left side downward twist area with the center line of the sub-groove. At the same time, a stainless steel compensation shim with a thickness of 0.05mm is pasted on the left edge of the base plate. S3. Electroforming operation: The bath formula is the same as in Example 1, with a pH value of 4.2 and a nickel ion concentration of 95 g / L; the current density is 4 A / dm², the temperature is 55℃, and the time is 12 hours; the water flow velocity in the jet hole is 1.0 m / s, and the annular circulation velocity is 0.6 m / s.

[0040] Experimental results: The nickel plate twisting deviation was reduced to 0.05 mm, the nickel layer thickness on the left side was 0.04 mm thicker than that on the right side, the stress distribution was uniform, and there were no cracks or deformations.

[0041] Based on Examples 1 and 2, it can be concluded that the equipment of the present invention, through optimized layout and water flow control, is significantly superior to traditional equipment in reducing plate distortion, improving uniformity and efficiency.

[0042] The above embodiments demonstrate that the equipment and method of the present invention can effectively solve the problems of plate twisting and pattern deviation in nickel plate electroforming, and are especially suitable for the printing and packaging field with strict precision requirements. Moreover, they are easy to operate, highly stable, and have good prospects for industrial application.

[0043] It should be noted that the aforementioned electrical components are equipped with power supplies, and their control methods are existing technologies. To avoid redundancy, they will be described here uniformly. Furthermore, this application is primarily for the protection of mechanical equipment, so the control methods and circuit connections will not be explained in detail herein. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision dimensional control method for nickel plate electroforming, characterized in that: Includes the following steps: Step 1: Pre-treatment of the base plate: The surface of the base plate to be electroformed is degreased, polished and activated; Step 2, Pattern Positioning: Measure the twisting direction and deviation value of the pattern on the base plate. When the right edge of the base plate is used as the reference for measurement, if the pattern on the left side has a downward twisting deviation of 0.1-0.5mm, fix the base plate with the positioning component so that the center area of ​​the downward twisted pattern on the left side is aligned with the center line of the sub-groove. Step 3, Electroforming Operation: Start the water pump to form a circular flow loop in the bath, and simultaneously connect the power supply, controlling the current density to 2-5A / dm², the electroforming temperature to 50-55℃, and the electroforming time to 8-12 hours; During the electroforming process, apply directional stress to the nickel ion deposition process on the substrate surface using upward jet water flow and circular circulating water flow, so that the nickel layer thickness in the corresponding area of ​​the lower twist pattern on the left is 0.02-0.05mm thicker than that in the reference area on the right.

2. The high-precision dimensional control method for nickel plate electroforming according to claim 1, characterized in that: In step three, the pH value of the bath solution is 3.8-4.2, and the nickel ion concentration in the bath solution is 80-100 g / L.

3. The high-precision dimensional control method for nickel plate electroforming according to claim 2, characterized in that: In step two, when the downward twist deviation of the pattern on the left side is greater than 0.5mm, a compensation shim with a thickness of 0.03-0.08mm is pasted on the left edge of the base plate.

4. The high-precision dimensional control method for nickel plate electroforming according to claim 3, characterized in that: Electroforming is performed using a nickel plate electroforming equipment. When measuring with the right side as the reference, and twisting the pattern on the left side downwards, the pattern on the left side is positioned opposite the secondary groove when the plate is placed in the groove. Under the impact of the water flow below and the action of the circulating water flow, the stress on the upper nickel layer on the twisted side increases, reducing the size of the twisted plate.

5. The high-precision dimensional control method for nickel plate electroforming according to claim 4, characterized in that: The tank liquid circulation is driven by a water pump, and a ring flow is formed by the upward holes in the pipes on the lower side of the main tank and the parallel holes in the partition plate between the main and auxiliary tanks.

6. A high-precision dimensional control nickel plate electroforming equipment for use in any one of claims 1-5, characterized in that: A high-precision dimensional control nickel plate electroforming equipment includes a main tank, a secondary tank, pipes, a water pump, a baffle plate, a titanium basket bag for the anode, and a cathode. The main tank and the secondary tank are arranged side by side in the horizontal direction, and the bottoms of the main tank and the secondary tank are connected by a circulation pipe. At least three injection holes are opened on the circulation pipe on the lower side of the main tank. The axis of the injection holes is set at an angle of 60°-90° with the horizontal plane and is used to spray upward water into the main tank.

7. A high-precision dimensional control nickel plate electroforming equipment according to claim 6, characterized in that: The main tank and the auxiliary tank are arranged side-by-side, replacing the traditional front-to-back arrangement. The pipe on the lower side of the main tank has holes facing upwards to create an upward-flowing water flow. A baffle is vertically installed between the adjacent side walls of the main tank and the auxiliary tank. The baffle has at least five guide holes with their axes parallel to the vertical side of the titanium basket bag in the anode assembly. A water pump is installed on the circulation pipe, driving the tank liquid to flow back to the circulation pipe sequentially through the spray hole on the lower side of the main tank, the inside of the main tank, the guide holes of the baffle, and the inside of the auxiliary tank, forming a ring-shaped flow loop parallel to the side of the titanium basket bag. The cathode assembly includes a cathode plate and a conductive wire. One end of the conductive wire is connected to the top edge of the cathode plate, and the other end is connected to the negative terminal of an external power source. The diameter of the conductive wire is 0.5-1 mm and its conductivity is ≥98% IACS.

8. A high-precision dimensional control nickel plate electroforming equipment according to claim 7, characterized in that: The partition between the main tank and the auxiliary tank has holes that are parallel to the titanium basket bag of the anode. Under the action of the water pump, the tank liquid is circulated, forming a ring flow parallel to the titanium plate. A conductive wire is provided at the cathode to increase conductivity and promote nickel ion deposition.

9. A high-precision dimensional control nickel plate electroforming equipment according to claim 8, characterized in that: The diameter of the injection holes is 8-12mm, and the distance between two adjacent injection holes is 15-20cm; the diameter of the guide holes is 15-20mm, and the distance between two adjacent guide holes is 20-30cm. The anode assembly includes a titanium basket bag and an anode plate. The titanium basket bag is vertically installed on the inner wall of the main tank away from the secondary tank. The anode plate is embedded in the titanium basket bag, and the surface of the anode plate is parallel to the plane where the guide holes of the partition are located.

10. A high-precision dimensional control nickel plate electroforming equipment according to claim 9, characterized in that: The nickel plate electroforming equipment also includes a positioning component, which includes a scale set on the top edge of the main tank and the auxiliary tank, and a positioning clamp slidably connected to the scale. The positioning clamp is used to fix the base plate to be electroformed.

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