With electric control knives a folio buckle-knife combination folding machine with a pile feeder or around feeder. Parallel folding of the ZYHD series can be carried out times with the buckle plates. The folding fonts of the signatures may be concertina fold, parallel fold or letter fold. it can handle parallel folding 2 times. Rightangle folding can be carried out 3 times combination the buckle plates and the folding knives. At the same time of folding, perforating and creasing can be handled. The standard machine is suitable for handling 8mo, 16mo and 32mo signatures. The two-on folder can handle 32mo two-on signatures, except possessing the folding functions of the standard machine.

The machine adopts Japan's Omron, servo-controlled transmission system,PLC control system, high-precision photoelectric, close to detection system, Frequency Control, color display screen contact. Fold knife by the servo motor control, stepping fold knife controlled and adjusted by the servo motor is safe and convenient to debug, and can achieve full detection, tracking, data display, troubleshooting tips and so on, it is suitable for large and medium-sized printing factory.(knife won the national electronic control technology patents and access to scientific and technologic progress second prize.)