Steel tube core for electrolytic copper foil

Abstract

The utility model relates to the technical field of electrolytic copper foils, in particular to a steel pipe core for electrolytic copper foils, which comprises an outer steel pipe and an inner steel pipe sleeved inside the outer steel pipe, coatings are coated on the inner surface and the outer surface of the outer steel pipe, and oxidation film layers are arranged on the inner surface and the outer surface of the inner steel pipe. According to the technical scheme, the pipe core is made of high-strength steel, has good strength and rigidity and can bear tension and pressure in the copper foil winding process, the high-strength pipe core can bear higher winding speed and tension, production efficiency is improved, an oxidation film layer is generated through chemical reaction of the inner steel pipe, and therefore the copper foil winding effect is improved. Friction and abrasion between a winding shaft and a pipe core in the slitting process are effectively reduced, the rusting problem caused by abrasion of the surface layer of the pipe core is prevented, the outer steel pipe is provided with a layer of surface layer structure which is smooth in surface, resistant to abrasion or easy to repair, and therefore the copper foil winding quality and stability are improved, and the service life of the copper foil is prolonged. And the problems of wrinkles, deformation, scratches and the like of the copper foil are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic copper foil, in particular to a steel tube core used for electrolytic copper foil. Background Art

[0002] Currently, electrolytic copper foil is a basic material in the electronic circuit and lithium battery industries. Its quality and performance have a significant impact on the performance of electronic products and lithium batteries. During the production process of electrolytic copper foil, the electrolytically generated copper foil needs to be slit and rolled onto a tube core for subsequent processing and use. Traditional materials such as FRP, ABS, and paper tube cores have certain deficiencies in strength, wear resistance, and corrosion resistance. These materials can easily cause wrinkles and deformation in the copper foil during the rolling process, affecting the quality and performance of the electrolytic copper foil. Improvements are needed. Therefore, we propose a steel tube core for electrolytic copper foil. Utility Model Content

[0003] The purpose of the utility model is to provide a steel tube core for electrolytic copper foil, which solves the problems raised in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel tube core for electrolytic copper foil, comprising an outer steel tube and an inner steel tube sleeved inside the outer steel tube, the inner and outer surfaces of the outer steel tube are coated with a coating, the inner and outer surfaces of the inner steel tube are provided with an oxide film layer, four card slots are opened around the inner wall surface of the outer steel tube, and a card strip that is engaged with the card slot is integrally formed on the outer wall surface of the inner steel tube, and the outer steel tube is fastened to the inner steel tube by countersunk screws.

[0005] As a preferred implementation of the technical solution of the present application, the coating is any one of a chromium layer, a paper layer and an FRP layer.

[0006] As a preferred implementation scheme of the technical solution of the present application, a number of threaded holes A are horizontally aligned on the surface of the card strip, and four groups of through holes are arranged around the circumferential surface of the outer steel pipe. The four through hole groups are respectively aligned with the four card slots. The through hole groups include a number of horizontally aligned through holes, and the through holes include countersunk holes and matching holes that are interconnected. The matching holes are vertically aligned with the threaded holes A.

[0007] As a preferred implementation of the technical solution of the present application, the countersunk screw includes a countersunk cap and a screw segment. The screw segment passes through the matching hole and is threadedly connected to the threaded hole A. The countersunk screw is located inside the countersunk hole.

[0008] As a preferred implementation of the technical solution of the present application, the thickness of the countersunk cap is 2 mm smaller than the depth of the countersunk hole, and a blocking cover for shielding the countersunk cap is embedded in the end face of the countersunk hole.

[0009] As a preferred implementation of the technical solution of the present application, four slots are equiangularly distributed on the inner wall of the outer steel pipe, and the outer dimensions of the clips match the slots.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] 1. The technical solution of the present application adopts high-strength steel to make the tube core, which has good strength and rigidity and can withstand the tension and pressure during the copper foil winding process. The high-strength tube core can withstand higher winding speeds and tension, thereby improving production efficiency. A layer of oxide film is generated by chemical reaction on the inner steel tube, which effectively reduces the friction and wear between the winding shaft and the tube core during the slitting process, and prevents rust caused by wear on the surface of the tube core. A layer of smooth surface, wear-resistant or easy-to-repair surface structure is set on the outer steel tube, thereby improving the quality and stability of the copper foil winding, reducing problems such as wrinkles, deformation and scratches of the copper foil, and improving the yield and quality of the electrolytic copper foil. The tube core has good wear resistance and corrosion resistance, which reduces the frequency of tube core replacement and reduces the maintenance cost during the production process.

[0012] 2. The technical solution of the present application is formed by a tube core that is assembled in a disassembled manner using an outer steel tube and an inner steel tube through countersunk screws. This not only facilitates the separation of the inner and outer surfaces of the tube core to form an oxide film layer and a coating layer, but also allows for separate repair or replacement of the oxide film layer or the coating layer by disassembly when the oxide film layer or the coating layer is severely worn, thereby reducing subsequent use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a schematic diagram of the assembly of the outer steel tube and inner steel tube of the steel tube core used for electrolytic copper foil;

[0015] Figure 2 Schematic diagram of the structure of the outer steel pipe;

[0016] Figure 3 Schematic diagram of the structure of the inner steel pipe;

[0017] Figure 4 A side view of a steel tube core used for electrolytic copper foil.

[0018] In the figure: 1. Outer steel pipe; 2. Countersunk screw; 3. Inner steel pipe; 4. Through hole group; 401. Countersunk hole; 402. Matching hole; 5. Slot; 6. Threaded hole A; 7. Clip strip. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1, as Figure 1-4 As shown, the utility model provides a technical solution: a steel tube core for electrolytic copper foil, comprising an outer steel tube 1, an inner steel tube 3 sleeved inside the outer steel tube 1, the inner and outer surfaces of the outer steel tube 1 are coated with a coating, the inner and outer surfaces of the inner steel tube 3 are provided with an oxide film layer, the inner wall surface of the outer steel tube 1 is surrounded by four card slots 5, the outer wall surface of the inner steel tube 3 is integrally formed with a card strip 7 that is engaged with the card slot 5, the outer steel tube 1 is fastened to the inner steel tube 3 by a countersunk screw 2, the outer steel tube 1 and the inner steel tube 3 are connected. The thickness is 8mm, the depth of the card slot 5 is 4mm, the protruding thickness of the card strip 7 is 4mm, the inner steel tube 3 is blackened or electrophoretically treated to form a wear-resistant and corrosion-resistant oxide film, and the outer steel tube 1 is plated with chrome and other easy-to-repair materials by electrolytic deposition. The tube core is used in the winding process of electrolytic copper foil. Under the conditions of a winding speed of 100 meters / minute and a tension of 500 Newtons, the surface of the wound copper foil is smooth, without wrinkles and scratches, and the service life of the tube core reaches more than 30 times.

[0021] In Example 2, the thickness of the outer steel pipe 1 and the inner steel pipe 3 are both 8 mm, the depth of the card slot 5 is 4 mm, and the protruding thickness of the card strip 7 is 4 mm. The inner steel pipe 3 is blackened or electrophoretically treated to form a wear-resistant and corrosion-resistant oxide film. The outer steel pipe 1 is coated with easy-to-repair materials such as paper and FRP through the application of coating technology. The tube core is applied to the winding process of the electrolytic copper foil. Under the conditions of a winding speed of 100 meters / minute and a tension of 500 Newtons, the surface of the wound copper foil is smooth, without wrinkles or scratches. After the tube core is recovered, it can be reused by recoating.

[0022] In the preferred technical solution, a number of threaded holes A6 are horizontally aligned on the surface of the clamping strip 7, and four groups of through hole groups 4 are arranged around the circumferential surface of the outer steel pipe 1. The four through hole groups 4 are respectively aligned with the four clamping slots 5. The through hole group 4 includes a number of horizontally aligned through holes. The through holes include countersunk holes 401 and matching holes 402 that are interconnected. The matching holes 402 are vertically aligned with the threaded holes A6. The inner steel pipe 3 and the outer steel pipe 1 are connected by countersunk screws 2 to improve the tightness of the matching between the inner steel pipe 3 and the outer steel pipe 1.

[0023] In the preferred technical solution, the countersunk screw 2 includes a countersunk cap and a screw segment, which passes through the mating hole 402 and is threadedly connected to the threaded hole A6. The countersunk screw 2 is located inside the countersunk hole 401. The thickness of the countersunk cap is 2 mm smaller than the depth of the countersunk hole 401. A blocking cover for covering the countersunk cap is embedded on the end face of the countersunk hole 401. The blocking cover is used to cover the countersunk screw 2 and the countersunk hole 401, so that the coating can be completely coated on the surface of the outer steel pipe 1.

[0024] In the preferred technical solution, four slots 5 are equiangularly distributed on the inner wall of the outer steel pipe 1 , and the outer dimensions of the clamping strip 7 match the slots 5 . The clamping strip 7 cooperates with the slots 5 to improve the overall stability of the inner steel pipe 3 and the outer steel pipe 1 .

[0025] In summary, this embodiment is based on the defects of traditional FRP, ABS and paper tube core materials in terms of strength, wear resistance, corrosion resistance, etc., and proposes a steel tube core. At the same time, the inner and outer surfaces of the tube core are treated separately, so that the inner surface has the effect of wear resistance and corrosion resistance, and the outer surface has the effect of wear resistance or repairability. The high-strength tube core can withstand higher winding speeds and tensions, thereby improving production efficiency. A layer of smooth surface, wear-resistant or easy-to-repair surface structure is set on the outer steel tube, thereby improving the quality and stability of copper foil winding, reducing problems such as wrinkles, deformation and scratches of the copper foil. The steel tube core is assembled by disassembly of the outer steel tube and the inner steel tube through the countersunk screw 2, which is not only convenient for separating the inner and outer surfaces of the tube core to form an oxide film layer and a coating layer, but also when the oxide film layer or the coating layer is severely worn, they can be repaired or replaced separately by disassembly, thereby reducing subsequent use costs.

Claims

1. A steel tube core for electrolytic copper foil, characterized in that: The invention comprises an outer steel pipe (1) and an inner steel pipe (3) sleeved inside the outer steel pipe (1), wherein the inner and outer surfaces of the outer steel pipe (1) are coated, and the inner and outer surfaces of the inner steel pipe (3) are provided with an oxide film layer, four grooves (5) are provided around the inner wall surface of the outer steel pipe (1), and a clamping strip (7) clamped with the grooves (5) is integrally formed on the outer wall surface of the inner steel pipe (3), and the outer steel pipe (1) is fastened to the inner steel pipe (3) by a countersunk screw (2).

2. The steel tube core for electrolytic copper foil according to claim 1, characterized in that: The coating layer is any one of a chrome layer, a paper layer and an FRP layer.

3. The steel tube core for electrolytic copper foil according to claim 1, characterized in that: The surface of the clamping strip (7) is horizontally aligned with a plurality of threaded holes A (6), and the circumferential surface of the outer steel pipe (1) is surrounded by four through hole groups (4), and the four through hole groups (4) are respectively aligned with the four clamping slots (5). The through hole groups (4) include a plurality of horizontally aligned through holes, and the through holes include countersunk holes (401) and matching holes (402) that are interconnected, and the matching holes (402) are vertically aligned with the threaded holes A (6).

4. The steel tube core for electrolytic copper foil according to claim 3, characterized in that: The countersunk screw (2) comprises a countersunk cap and a screw segment, the screw segment passing through the matching hole (402) and being threadedly connected to the threaded hole A (6), and the countersunk screw (2) is located inside the countersunk hole (401).

5. The steel tube core for electrolytic copper foil according to claim 4, characterized in that: The thickness of the countersunk cap is 2 mm smaller than the depth of the countersunk hole (401), and the end surface of the countersunk hole (401) is inlaid with a blocking cover for shielding the countersunk cap.

6. The steel tube core for electrolytic copper foil according to claim 1, characterized in that: The four clamping slots (5) are equiangularly distributed on the inner wall of the outer steel pipe (1), and the outer dimensions of the clamping strip (7) match those of the clamping slots (5).

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