Nowadays, aluminum sheet, aluminum coil and other materials will have a very broad consumer market. Benefiting from the excellent performance of aluminum sheet, strong corrosion resistance, and lighter weight, many industries use aluminum sheet as an alternative to traditional metal materials. Therefore, many aluminum coil manufacturers have emerged in recent years. Aluminum coil manufacturers may encounter defects on the surface of aluminum coils when making aluminum coils. So, do you know the reasons for the defects on the surface of aluminum coils?
The reasons for the defects on the surface of the aluminum coil:
1. The roll shape of the pressing and folding (folding) is incorrect. For example, the bearing of the calender is heated, which makes the two ends of the roll swell. As a result, the extruded coil is thick in the middle and thin on both sides;
The wave before calendering is too large, so that the amount of calendering is too large, resulting in folds;
When the sheet is calendered, it is easy to cause folds when the feeding is not correct; the thickness difference between the two sides of the coil is large, and it is easy to produce folds.
2. Surface bubbles: there is a dirty surface on the uneven surface of the ingot, and it is not cleaned before loading into the furnace;
After etching, there are residual traces of etching and washing on the surface of the ingot and the aluminum coil;
If the heating time is too long or the temperature is too high, the surface of the ingot is oxidized;
3. Ingot cracking: the reduction amount is too large during hot rolling, cracking from the end of the ingot; the heating temperature of the ingot is too high or too low
Sanmen United Building Materials Co., Ltd. (aluminum coil manufacturer) is a modern enterprise specializing in deep processing of aluminum surfaces. The products cover a variety of surface effects and are favored by the majority of users. The company has now formed a production and sales of color-coated aluminum, mirror aluminum, brushed aluminum, wood-grained aluminum, stone-grained aluminum, embossed aluminum, etc., with quality control, product development, and after-sales service.
The company will adhere to continuous innovation, integrity-based, quality first, and won the recognition and trust of customers. The company's products are exported to dozens of countries and regions such as India, Vietnam, Russia, South Korea, the Middle East, and Southeast Asia. We look forward to working with our trading partners. Establish a solid, mutually beneficial and win-win strategic partnership. Contact: 86-576-83381188