The idea of ​​the double-sided ladder is that both sides of the printed matter are folded with a ladder, so that the front and back of the printed matter appear to be staggered. MBO, a post-press folding equipment supplier, introduced how to perform a double-sided folding process on a printed product six times.
1. Fold out a sample first, mark A1 ~ A6 on the crease, and B1 ~ B6 on the back, representing the crease
Second, the first fold
Fold with the first fence of the first group, the paper head to the A1 part enters the fence, and fold out the paper mark A1.
Three, the second fold
Fold with a set of third fences, the A1 to A3 parts of the paper enter the fence and fold out the paper marks A3
Fourth, the third fold
Fold with the first block of the first group. The A3 to A6 parts of the paper enter the fence and fold out the fold B6. Then the paper enters the second folding unit with A6 as the paper head.
Five, the fourth fold
Fold with the second group and the second fence, and the A6-A5 part of the paper enters the fence. This step folds two creases A5 and B2 at the same time. The principle is that when the paper head A6 is folded over, it resists the part between B1 and A2 of the paper, resulting in a crease B2. , But from the low pressure of the paper head A6. Therefore, the paper needs to be hard enough, so that the paper head has enough low pressure, that is, not all paper can be folded in two steps.
6. U-turn
With the third block of the second group, the fold B4 cannot be folded out, because the longer part A6 / B6 will be folded in. So what to do? We opened the third fence, and installed rubber bands on the fence strips, so that the paper after the fourth folding was entered into the third fence and was bounced back to the folding roller without folding, but the end of the paper became the paper head. . The original paper was changed from A5 / B5 to A1 / B1.
Seventh, fifth fold
After turning around, the B1 to B4 parts of the paper enter the fence, and then enter the second group of the fourth fence to fold out the crease B4.
Eight or six double-sided step folding is completed.
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