First, the impact of folding principle
By means of longitudinal fold triangle top folded along the longitudinal direction of the paper, activities pocket knife out of the folding cylinder red folding paper, push the paper to two series of rotating folding roller 4, the folding posts compaction and sent to the closing drum decals. Click the principle of folding folding device called shock-folding machine. The impact folding machine layout is simple, suitable for high-speed printing, folding accuracy is slightly lower.
Second, the roll-fold folding principle
Now off to cut the paper to be folded in the folding cylinder 2 and the output drum 1 by the needle pick 4 pick live changes, even the center line of the rolling cylinder, flexible knife 5 3 paper into the drum 2 neutral , plywood 6 and 7 along the fold line clamped by the drum away the knife exit from the folded seam. The end of the relative roll folding device called a roller knife and another drum plywood drum folding machine.
Roll folding machine folding high accuracy, speed, and are often used in the the web Books rotary printer. Based on the number of folding the end, the type of signatures, the choice is not the same intention of folding rollers and folding plan.
Knife folding principle
Knife folding selection of knife 1 paper pressed into two counter-rotating folding roller 2, and then sent by the folding rollers, at the end of a folding process. The end of the folding paper conveyor belt to take away the second fold, fold.
Knife folding has higher precision, real signatures crease pressure, because of the inertia of the knife, folding slower.
Fourth, the gate folding principle
Sheets sent by the output page device by two rotating folding roller 2, transported to the folding gate, hit the gate baffle 5, the print sheet is forced twists and turns in pairs folded into half-width folding roller 3 center, the end of the top fold brochure, then folded over a folded signatures to a folding gate, the same way the second and third fold. Eventually sent to the receiving table, at the end of a book affixed to the folding operation.