Automatic Die Cutting Machine For Sodium Battery Production

1、 Equipment introduction

1. Equipment functions
* unwinding function (two unwinding mechanisms are adopted, and the servo motor independently controls the automatic unwinding);
* deviation correction function (correcting the deviation of the unwinding mechanism and the electrode is being transported before punching);
*belt tension control system (belt tension is independently controlled by two buffer modes, which can reduce belt jitter in the process of high die cutting);
* the metal concave convex die is used to complete the forming of the pole ear (tungsten steel die is used, with high service life and small punching Burr);
* dust removal of equipment rollers (dust absorption of pulling rollers);
* before die cutting, the electrode is brushed and vacuumed;
* single chip cutting function (adopt servo control crankshaft drive structure to complete cutting, adopt tungsten steel mold, with high service life and small punching Burr);
* single electrode  conveying function (three vacuum belts are used to convey the electrode, dust removal on both sides of the electrode and screening of defective products are carried out during the conveying process);
* dust removal on both sides of the electrode (wool felt and negative pressure dust collection by default; non-contact electrostatic dust removal device is reserved) this dust removal method is optional;
*double CCD detection and labeling of electrode surface defects (CCD detects both sides of the electrode, the labeling machine labels the unqualified products after detection, and pulls this section through when the pole ear is formed; the equipment does not have this function by default, and the installation position is reserved) this function is optional;
l color code detection of defective products (the sensing electrode has a defective label, and the electrode device automatically screens out defective products);
*single electrode size CCD detection (for each electrode overall size detection, the equipment will automatically screen out defective products);
* electrode collection function (electrode counting function is installed in the material box, with the function of sorting electrodes, and the electrodes are collected neatly in the material box);
*the cartridge case conversion and conveying function (the cartridge is installed on the turntable, and the cartridge case is automatically converted; the manipulator extracts the cartridge case and connects the material line) the cartridge case can be shared with the lamination machine;

2. Equipment principle
The principle of continuous feeding of polar coil, controlling die punching and polar impulse through the mode of electronic cam, and controlling unequal distance by servo traction.

3. Equipment action process

4. Overall structure
1) Size：4200mm L；W：1280mm；H：2050mm。
2) Weight：1.85T
3) Overall structure diagram

• The material belt traction and conveying process consists of two sets of traction roller assemblies；
• The first set of high-speed control reeling process conveying synchronization；
• The second set of high-speed control punching center pole piece conveying synchronization；
• Adopt servo control unequal distance feeding function；
• There is a tan guide wheel in front of the traction roller to prevent the tab from being discounted after die cutting. The guide wheel can be adjusted easily when changing the model；
• The two rollers are directly equipped with powder absorbing rollers to remove the dust accumulated during the traction of the rollers；
• The pressing roller is compressed automatically by air cylinder, which is convenient for threading.

5.Cutting mechanism

• In the process of pole slice cutting, there is pre pressing function in the front and traction roller in the back to ensure the ductility of pole Slice before cutting and the dimensional accuracy of pole slice powder cutting;
• After cutting, the equipment is equipped with induction optical fiber to prevent the pole knife from being mistaken for multiple pieces of waste;
• The lower cutter is installed with vacuum to absorb dust;
• The embedded tungsten steel knife is adopted to reduce the maintenance and replacement cost；
• Cutting has counting function.

• During the operation of the electrode, the servo motor drives the sorting mechanism to correct the electrode;
• After correction, the electrode are stacked in the material box to ensure that the electrode in the material box are neat；
• The material box has a counting function, and the pole pieces are free of damage, crimping, bending, scratches and other defects during operation and stacking；
• When the electrode in the material box is filled, it will automatically switch to the buffer mechanism to receive the material.

7、Dust removal device (optional)
1) Wool wheel, negative pressure to collect dust

• The equipment adopts wool wheel and negative pressure dust removal method, which has good dust removal effect, high efficiency and low cost;
• When the electrode passes through the inlet end of the cleaning head, roll the driving brush to sweep the powder to remove the dust on the surface of the electrode；
• Subsequently, the pole piece receives internal negative pressure wind to absorb drift dust and dust on the brush wheel；
• Dust is collected in the negative pressure fan, which is easy to clean (once a month, cleaning time ≤ 5min).

• Adopt the non-contact dust removal method of high-pressure ion wind, which has good dust removal effect, high efficiency and high cost;
• When the electrode passes through the inlet end of the cleaning head, the ionization cloud here and the static electricity on the coil surface are removed;
• Then, the electrode is affected by the turbulent air flow generated by the internal blowing and vacuum air flow of the cleaning head device；
• The effect of turbulent air flow leads to high-frequency fretting of the electrode；
• The combined action of high-frequency fretting and turbulent air flow of the electrode breaks the air interface layer on the surface of the pole piece, and at the same time, the pollutants released by the interface layer are sucked into the vacuum air flow；
• When the electrode leaves the cleaning head, the pole piece will pass through another ion cloud to prevent secondary pollution on the surface of the electrode.

9、Schematic diagram of CCD detection and labeling (an optional device)

10、 System functions

• Intelligent classification: using machine learning and artificial intelligence technology, self-learning and automatic classification can be carried out according to the user's definition of defect category;
• PostgreSQL:Adopt the most advanced open source database to store defect images, such as defect location, size and other information；
• Automatic archiving: defect data can be automatically backed up to external devices or systems according to user settings
• Diversified reports: provide reports on test results and statistical data in the form of tables and graphs
• Surface evenness analysis: display the surface evenness of materials in real time with digital；
• Practical and convenient operation interface: it can eliminate and mark serious defects and other practical functions, which is convenient for operators to operate;
• IO interface: provide input and output signals such as alarm, paper break, roll change, start and stop;
• Factory interface: Based on Windows operating system, it can connect with other systems and equipment of customers through tcp/ip, Ethernet, OPC and other interfaces；
• Remote access maintenance: under the condition that the equipment is connected to the Internet, the system can be upgraded and maintained through Internet remote access；
• Technical support: 7 x 24-hour network and hotline support
• Detection system interface

Report viewing interface

Defect elimination Report

Main defect detection accuracy index table

Labeling machine device:
Equipped with a set of labeling machine, the pasting speed matches the cutting speed, and the labeling center line and the inner edge distance of the pole piece can be adjusted, with an accuracy of ± 2mm;
Label size: 12mm wide and 14mm long, which can be customized by users.

A、Size and specification of incoming materials

• Evenness error of incoming winding end face：±5mm；
• Serpentine error：X±2mm/m；

• Electrode wave：X±5mm/m；

• Ensure the service life of the mold, and the change of material thickness at the cutting position of the mold is less than 10 μ m

C、Equipment production process

D、Technical index parameters of equipment

E、Main components of equipment

F、Equipment use environment

G、Spare parts