Aluminum foil slitting process for 0.005 mm ultrathin capacitor

Abstract

The invention belongs to the technical field of aluminum foil processing, and relates to a 0.005 mm ultrathin capacitor aluminum foil slitting process, which is suitable for an Ahenbach slitting machine, and comprises the following steps: a soft rubber roller is used for coiling, the convexity of an upper flattening roller is 0, the convexity of an upper flattening roller is 20 per thousand to 100 per thousand, the convexity of a lower supporting roller is 0, and the convexity of a lower flattening roller is 20 per thousand to 100 per thousand; the pressure of the upper flattening roller is constant, and the pressure gradient of the upper flattening roller is 70-100% of the set pressure; the pressure gradient of the lower flattening roller is 70-100% of the set pressure, and the pressure of the lower supporting roller is constant; the uncoiling tension is-50 to-60 N / mm < 2 >, the coiling tension is 35 to 45 N / mm < 2 >, the upper coiling tension gradient is 100 to 60 percent of the set tension, and the lower coiling tension gradient is 100 to 60 percent of the set tension; and after the bottoming is established, the speed is increased to 400-550 m / min through one key, and high-speed slitting is achieved. Appropriate hardness and convexity are selected for the winding rubber roller, so that the defects of layer crossing, wrinkles and the like are overcome; by setting the tension gradient and the pressure gradient during coiling, one-key speed increasing and high-speed slitting of 0.005 mm aluminum foil are achieved, and the defects of bottoming waste materials, staggered layers, sun lines and the like during speed increasing are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum foil processing, relates to aluminum foil slitting, and in particular to a 0.005 mm ultra-thin capacitor aluminum foil slitting process. Background Art

[0002] Aluminum foil slitting is performed by slitting equipment, usually vertical slitting machines and horizontal slitting machines. In terms of the thickness of the aluminum foil, double-zero aluminum foil generally uses a vertical slitting machine. Among the slitting equipment introduced domestically, the slitting machines with a high market share and relatively mature are KAMPM and MIDI, which have a good reputation in slitting aluminum foil with a thickness of less than 0.006mm.

[0003] At present, Achenbach's product quality fluctuates greatly when slitting ultra-thin capacitor aluminum foil below 0.006mm. If low-speed production is used to ensure the slitting quality of the product, it will seriously affect production efficiency and increase production costs. Summary of the invention

[0004] In view of the above problems, the present invention discloses a 0.005 mm ultra-thin capacitor aluminum foil slitting process.

[0005] Technical Solution

[0006] A 0.005 mm ultra-thin capacitor aluminum foil slitting process, suitable for an Achenbach slitting machine, comprises the following steps:

[0007] A. The rubber rollers used for winding the slitting machine are soft rubber rollers, and the convexity is set as follows: the upper flattening roller convexity is 0, the upper flattening roller convexity is 20‰~100‰, the lower support roller convexity is 0, and the lower flattening roller convexity is 20‰~100‰;

[0008] B. Set the pressure gradient of the rubber roller: the pressure of the upper flattening roller is constant, and the pressure gradient of the upper flattening roller is set to 70-100% of the set pressure; the pressure gradient of the lower flattening roller is set to 70-100% of the set pressure, and the pressure of the lower support roller is constant;

[0009] C. Set the tension gradient: the unwinding tension is set to -50 to -60 N / mm 2 , the winding tension is set to 35~45N / mm 2 , the upper winding tension gradient is 100-60% of the set tension, and the lower winding tension gradient is 100-60% of the set tension;

[0010] D. Use a tube core with consistent wall thickness and good roundness for winding. After completing the tape threading and establishing a good base within 10m, increase the speed to 400-550m / min with one button, preferably 500m / min, to achieve high-speed and stable slitting.

[0011] In a preferred disclosed example of the present invention, in step A, the hardness of the soft rubber roller is 65-70 ShoreA, and the hardness of the rubber roller of the original machine is 80 ShoreA or above. The soft and hard rubber roller is used to eliminate the layer-splitting defect of the aluminum foil during high-speed operation.

[0012] According to a preferred disclosed example of the present invention, in step A, the convexity of the upper flattening roller is 50‰ to 100‰, the convexity of the lower flattening roller is 50‰ to 100‰, and the convexity of the flattening roller of the original machine is 0; the ultra-thin aluminum foil pattern is generally easy to loosen, and the upper flattening roller / lower flattening roller has a certain convexity, which makes it easier to flatten the loose positions of the aluminum foil pattern and facilitate the winding of the aluminum foil.

[0013] In a preferred embodiment of the present invention, in step B, the constant pressure means that the pressure set in the slitting process is constant.

[0014] In a preferred disclosed example of the present invention, in step B, the flattening roller pressure gradient curve is set to 70-100% from the initial 80% which gradually increases with the increase of the coil diameter to 100% stop, thereby reducing the tower-shaped defects formed with the increase of the coil diameter.

[0015] In a preferred disclosed example of the present invention, in step C, the gradient setting of the winding tension is gradually reduced from 100% of the given tension in the process to 60% and then stopped as the coil diameter increases, so as to reduce the end surface pattern defects caused by the slitting of the ultra-thin aluminum foil. The gradient setting with only tension in the original machine is 100% of the given tension in the process and gradually reduced to 90% and then stopped as the coil diameter increases. Compared with the tension gradient of the original machine, the scope of the present invention is larger and the ending tension is smaller, which is beneficial to the flatness of the aluminum foil surface when the ultra-thin aluminum foil stops at high speed.

[0016] In a preferred disclosed example of the present invention, in step D, the tube core is made of aluminum or steel.

[0017] Beneficial Effects

[0018] The present invention improves the slitting process of the Achenbach Buschhütten slitting machine, selects appropriate hardness and convexity for the winding rubber roller on the slitting machine, thereby solving defects such as layer stringing and wrinkles when winding 0.005mm thick aluminum foil; through the research and development of the tension gradient and the pressure gradient during winding, the one-key speed increase and high-speed slitting of the 0.005mm aluminum foil are achieved, and the bottoming waste and defects such as staggered layers and sun patterns during speed increase are reduced. The disclosed slitting process can achieve the effect of high-speed operation with one-key speed increase, and the quality of the ultra-thin capacitor aluminum foil after slitting meets the requirements and greatly improves the production efficiency. The 0.005mm capacitor aluminum foil cut by the Achenbach slitting machine using the process achieves the goal of one-key speed increase and 500 meters / minute high-speed slitting of ultra-thin aluminum foil, and the quality of the slitting product meets customer requirements. The production efficiency of the Achenbach slitting machine in slitting 0.005mm capacitor aluminum foil has been improved, breaking through the current situation of low-speed slitting of 0.005mm ultra-thin aluminum foil and reducing production costs. DETAILED DESCRIPTION

[0019] The present technology is described in detail below in conjunction with embodiments so that those skilled in the art can better understand the present technology, but the present invention is not limited to the following embodiments.

[0020] Example 1

[0021] A 0.005 mm ultra-thin capacitor aluminum foil slitting process, suitable for an Achenbach slitting machine, comprises the following steps:

[0022] A. The hardness of the four rubber rollers at the take-up of the slitting machine is 70ShoreA, and the convexity of the upper flattening roller and the lower flattening roller is 50‰, and the convexity of the upper flattening roller and the lower support roller is 0;

[0023] B. The initial pressure of the upper flattening roller and the upper flattening roller at the winding position is 0.5 bar, and the pressure gradient of the upper flattening roller increases from 70% to 100% with the winding diameter. The initial pressure of the lower winding support roller and the lower flattening roller is 0.5 bar, and the pressure gradient of the lower flattening roller increases from 70% to 100% with the winding diameter;

[0024] C. Tension setting: Unwinding tension - 60N / mm 2 , coiling tension 35N / mm 2 , where the upper and lower winding tension gradients are initially 100% and decrease to 60% as the winding diameter increases;

[0025] D. Set the running speed to 500m / min and the stop length to 12000m. Install the aluminum tube core and start winding for 10 meters. Then start the running key and increase the speed to 500m / min and keep it there.

[0026] Inspection and observation: Visual inspection shows that the end face is smooth and neat without patterns, and the appearance has no layering or towering, and the quality meets customer requirements. The equipment runs at high speed for 20 minutes to improve production efficiency.

[0027] Example 2

[0028] A 0.005 mm ultra-thin capacitor aluminum foil slitting process, suitable for an Achenbach slitting machine, comprises the following steps:

[0029] A. The hardness of the four rubber rollers at the take-up of the slitting machine is 65ShoreA, and the convexity of the upper flattening roller and the lower flattening roller is 100‰, and the convexity of the upper flattening roller and the lower support roller is 0;

[0030] B. The initial pressure of the upper flattening roller and the upper flattening roller at the winding position is 0.8 bar, and the pressure gradient of the upper flattening roller increases from 80% to 100% with the winding diameter. The initial pressure of the lower winding support roller and the lower flattening roller is 0.8 bar, and the pressure gradient of the lower flattening roller increases from 80% to 100% with the winding diameter;

[0031] C. Tension setting: Unwinding tension -50N / mm 2 , Coiling tension 45N / mm 2 , where the upper and lower winding tension gradients are initially 100% and decrease to 70% as the winding diameter increases;

[0032] D. Set the running speed to 550m / min and the stop winding diameter to 360mm. Install the aluminum tube core and start winding for 10 meters. Then start the running key to increase the speed to 550m / min and keep it there.

[0033] Inspection and observation: Visual inspection shows that the end face is smooth and neat without patterns, and the appearance has no layering or towering, and the quality meets customer requirements. The equipment runs at high speed for 30 minutes and winds 18,000 meters, greatly improving production efficiency.

[0034] It should be understood that the above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the specification of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A 0.005mm ultra-thin capacitor aluminum foil slitting process, suitable for Achenbach slitting machine, characterized in that: The following steps are involved: A. The rubber rollers used for winding the slitting machine are soft rubber rollers, and the convexity is set as follows: the upper flattening roller convexity is 0, the upper flattening roller convexity is 20‰~100‰, the lower support roller convexity is 0, and the lower flattening roller convexity is 20‰~100‰; B. Set the pressure gradient of the rubber roller: the pressure of the upper flattening roller is constant, and the pressure gradient of the upper flattening roller is set to 70~100% of the set pressure; the pressure gradient of the lower flattening roller is set to 70~100% of the set pressure, and the pressure of the lower support roller is constant; C. Set the tension gradient: the unwinding tension is set to -50~-60N / mm 2 , the winding tension is set to 35~45N / mm 2 , the upper winding tension gradient is 100~60% of the set tension, and the lower winding tension gradient is 100~60% of the set tension; D. Use a tube core with consistent wall thickness and good roundness for winding. After completing the tape threading and establishing a good base within 10m, increase the speed to 400~550m / min with one button to achieve high-speed and stable slitting.

2. The 0.005 mm ultra-thin capacitor aluminum foil slitting process according to claim 1 is characterized in that: In step A, the hardness of the soft rubber roller is 65-70 Shore A.

3. The 0.005 mm ultra-thin capacitor aluminum foil slitting process according to claim 1 is characterized in that: In step A, the convexity of the upper flattening roller is 50‰~100‰.

4. The 0.005 mm ultra-thin capacitor aluminum foil slitting process according to claim 1 is characterized in that: In step A, the convexity of the lower flattening roller is 50‰~100‰.

5. The 0.005 mm ultra-thin capacitor aluminum foil slitting process according to claim 1 is characterized in that: In step B, the constant pressure means that the pressure set for the slitting process is constant.

6. The 0.005 mm ultra-thin capacitor aluminum foil slitting process according to claim 1 is characterized in that: In step D, the tube core is made of aluminum or steel.

7. The 0.005 mm ultra-thin capacitor aluminum foil slitting process according to claim 1 is characterized in that: In step D, the speed is increased to 500 m / min with one key.