LQZH-800D/880D/1000D have the same structure with LQZH800G/880G/1000G. Based on G-series, D-series has the following improvements:
1. LQZH-D series adds the upper belt on the folding unit to improve the stability in box movement.
2. Adds the pre-press section before the press section to improve the stability and smoothness in box movement
3. Pressing unit has separate motor to control speed. It has auto trombone control function (only when the box coming, the pressing unit works).