Performance and advantages: a new four-PVC electrical casing production line, the use of high yield, good plasticizing performance of the twin screw extruder, with the flow optimized design of the mold, four pipe discharge uniform, extrusion speed; Four vacuum cooling boxes can be independently controlled and adjusted, and do not affect each other in the production process; Four traction cutting integrated design, save space. Rotary clamping, no replacement of clamping block. Chip - free cutting speed, high precision, accurate cutting length. Optional automatic laser printing system.