The newspaper has two kinds of different offset presses the principle of the way of the cross breaks, a kind of impact type folding, for a splint type folding. Due to the impact type folding of simple structure, convenient adjustment, and was widely used offset presses newspaper. Although the impact of also has the edge when machine operation speed change, newspaper products, the folding seam will change position, especially when the newspaper printing ink amount was more susceptible to folding clip roller, but for embossing disadvantages such as quality requirements for the newspaper is not very high, as long as the problem is not very serious, the impact of these shortcomings of folding machine completely will be the advantages that cover.
The working process of the folding impact type are as follows:
(1) printed by the SanJiaoBan longitudinal fold paper tape, after the guide roller and pull through paper roller, be on the edge roller pick needle hook;
(2) the tape in cutting knife edge roller pads and cutting roller cutting knife, serrated between through cutting knife cut it into sheet;
(3) of the roller folding planet folding knives will insert a folding clip newspaper between rollers complete cross breaks;
(4) fold the good newspaper clips from folding between rollers, and then fall into wing round was sent to the conveyor belt.
To use good impact type folding machine, the key is to do well, but the adjustment of the roller folding it is difficult to grasp. Here in Japan gaussian impact type folding machine as an example, the paper introduces the do.
1. Folding roller and cutting roller the relative position of the adjustment
In the assembly, the cutting knife edge roller pads should and cutting the roller zigzag cutting knife is right. Folding roller and cutting roller composed by a mesh with each other's gear transmission, cutting roller and transmission gears for key links, folding roller and transmission gears for long bore screw connection, change and screw holes of long connection position, can achieve edge roller gear and adjust the relative positions of the goal. The trace of the adjustment by changing the pick pinhole and cutting machine distance to achieve, but in practice do not advocate adjustment here.
2. Pick the needle of adjustment
Pick the expansion of actions by the needle transmission of CAM control, pick the adjustable needle trip by CAM mechanism, but decided to pick out each needle roller surface edge of height can adjust alone. In order to guarantee the needle to withdraw completely pick edge roller internal, pick out needle roller surface folding the height of less than pick adjustable needle should schedule. Measuring needle height to pick out the folding roller turned to pick out the needle, the largest amount to pick out the needle roller surface height 6 mm brochures for standard. In practical production according to the different thickness of the folding dose of the request, can fine-tune pick out of height. Needle
In the folding process, pick the needle is stretched out in advance, with the rotation of the drum folding, stretch out selective pins to plunge into the paper tape, so pick out the moment does not require needle very accurate, when adjustment in May not have to consider pick out of the needle moment. But when folding knife will insert folding clip roller newspaper, pick the needle in time, i.e., pick to retract needle of indents moment must be accurate, otherwise the indented too party for folding knives and tear out paper, indentation too early and to make paper tape for some time out of control, influence accuracy. Folding In addition, pick the needle indented process should also rapidly, make needle and planetary folding knives pick the action coordination. Loosen the adjustment on the transmission pick needle, or if the CAM tighten the screws indented too early would make pick the folding of roller CAM needle is turn mobile, and indent too late and will make the folding roller CAM pick needle the reversal of the direction.
3. Folding knives high adjustment
Folding knives of spindle is by folding roller operation gear do the movement of the planets, such folding knives axis rotation, and both the revolution. Folding knives rotation and transmission ratio of the revolution in the sun and planets wheel gear wheel of the relation said. Because folding knives rotation is actually planets wheel rotation, and folding knives revolution is the rotation of the drum folding, so that each turn, a week folding roller folding knives were put out three times, three phase difference is 120 °, only down the stretch out a, just to folding clip roll into so as to complete for middle cross breaks action.