After the cardboard box is sealed up and down in the middle of the front sealing machine, it enters the 90 degree corner machine and is pushed into the corner sealing machine by the pushing board. After photoelectric detection, the machine automatically adjusts the width and height according to the cardboard box specifications. No need to manually adjust the machine, simple, convenient, and fast. Automatically adjust the specifications of the cardboard box, and at the same time, automatically seal and smooth the upper and lower corners of the cardboard box, quickly and smoothly; The machine is controlled by PLC, which is easy to operate, easy to maintain, and has more stable performance. It can be combined with the FX-02 model to achieve adaptive I-shaped sealing Widely used in industries such as household appliances, textiles, food, department stores, pharmaceuticals, and chemicals.