Now more and more occasions begin to use roller shutter door, because it is convenient, fast and has heavy advantages. The structure of the common rolling shutter door (also known as the rolling shutter door) in our life is as a multi joint movable module series with the door plate, which runs on the fixed guide rails on both sides, and pulls the rolling shutter by the motor above the door body to drive the rolling shaft. The application of roller shutter door is not so. Always wide. It is widely used in shops, banks and medical treatment. Processing organization, garage, wharf, warehouse, factory and other places. Due to the increase of demand, more and more manufacturers appear in the market, resulting in uneven product levels. Let's share a principle that manufacturers of shutter doors purchase for you.