Talking about: folding printing skills

1. Impact folding principle

With the aid of the vertical folding triangular plate, the first fold is obtained in the longitudinal direction of the paper, the movable folding knife extends out of the folding cylinder to fold the paper, and pushes the paper between two continuously rotating folding rollers 4 to compact the folded sheet And sent to the collection of flower rollers. A folding device that performs folding according to this principle is called an impact folding machine. The impact folding machine has a simple structure and is suitable for high-speed printing, but the folding accuracy is slightly lower.

Second, the folding principle

The paper that has been cut off is folded on the folding roller 2 and the output roller 1 and is picked up and rotated by the pick pin 4. On the connecting line of the counter roller, the elastic folding knife 5 pushes the paper 3 into the gap of the roller 2 , Clamping plates 6 and 7 clamp them along the fold line, and are taken away by the roller 2, and the folding knife exits from the crease. The device that uses one roller's folding knife and another roller's splint to complete folding in relative rolling is called a roller folding machine.

Rolling folding machines have high folding accuracy and fast speed, and are generally used in web-based web presses. According to the completed folding times and the types of folding posts, different numbers of folding rollers and folding schemes are adopted.

3. The principle of knife folding

Knife folding is to use the folding knife 1 to press the paper 4 between two relatively rotating folding rollers 2, and then send out by the folding roller to complete a folding process. After the folding is completed, the paper is taken away by the conveyor belt and enters the second and third folds.

Knife-type folding has high precision, and the folding of the signature is compact. Due to the motion inertia of the folding knife, the folding speed is slow.

4. The principle of fence folding

The printed sheet 4 sent by the sheet feeding device passes through the two rotating folding rollers 2 and is transported into the folding fence. When it hits the fence baffle 5, the printed sheet is forced to bend into a half-fold into the middle of the folding roller 3 , Complete the first folding, and then fold the folded signature into the next folding fence, using the same method for the second and third folding. Finally, it was sent to the paper collection table to complete the folding work of a sticker.

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Packing

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