The selection of raw materials is the basis of the quality of thin aluminum foil. The Aluminium Foil manufacturer generally chooses 99.99% high purity aluminum foil 1235, 8011 series, strictly control the trace impurities content of iron, silicon, copper, reduce the compound intermixing between metals, avoid needle holes from the source There is a risk of cracking. The smelting stage adopts deep deaeration, multi-layer filtration smelting process, accurately control the smelting temperature of 750-780 degrees Celsius and the cooling rate of the ingot, subdivide the crystal structure of the casting, make the ductility and uniformity of the substrate reach the standard of ultra-thin rolling, and then follow In order to consolidate the foundation.
In the rolling process, the aluminum foil forming core of 6-9 micrometers is used, and the whole process is divided into several precision rolling steps. First, through hot rolling, the ingot is rolled to the thin plate base, and then gradually thinned through several cold rolling. When the thickness is close to 10 micrometers, the two-layer rolling method is adopted, relying on two aluminum foil synchronous rolling, high rigidity precision rolling machine, accurate rolling pressure and low-speed stable tension, a piece of thin stretch will greatly reduce the risk of fracture, and gradually reduce the amount under pressure Reduced to and finally rolled up to a thickness of 6-9 micrometers. It is a combination of high pure rolling oil lubrication cooling, real-time control of roller temperature, roller type and rolling speed, online laser thickness measuring system dynamic fine adjustment parameters, thickness tolerance is stable within ±0.3 microns Control. Protective atmosphere retreat heat after completion, accurate control retreat heat temperature of 300-350 ° c and length of retention time, eliminate rolling stress, improve the flexibility and tensile strength of the material, expandability.
Quality control throughout the entire production chain is the key to mass production of good products. For the three most common defects in ultra-thin aluminum foils: needle holes, wrinkles and thickness, manufacturers establish a multi-layer prevention and control system. The end of the raw material controls the degree of pure, the end of the rolling end purification plant filters the dust proof, high precision rolling oil, eliminates the fine particles making holes, and the number of needle holes per square meter can be controlled to an extremely low level I'm coming. In the process, rely on online intelligent inspection equipment to monitor the thickness change and horizontal degree of plate shape in real time, and correct the rolling tension and pressure parameters in a timely manner, so as to avoid wrinkles and edges of the material. After the finished product is cut off, carry out a comprehensive inspection of mechanical performance, surface roughness, sealing, strictly check the tensile strength, elongation rate, surface cleanliness, while regulating the process tension control cutting, roll flat, accurate size .
It is the high-end demand for a new material for the circuit that is now 6-9 micrometers ultra-thin aluminum foil. By forming technical barriers through raw material refining, precision rolling, and quality control of the whole process, head manufacturers integrate ultra-thin forming and stable quality, and continue to promote the miniaturization and high-end of aluminum foil industry to meet the strict demand of new energy and medical fields. I'm on it.
