Offset paper delivery failure

Four-open Heidelberger offset printing machine (P615) and four-opening one-turn (Y615) printing machine will appear unsteady in the process of taking-in paper collection teeth, especially the paper edge is torn, which directly affects the next color. Accurate overprinting. Since the paper handling action of the take-up tooth row and the roller dentition row is performed inside the machine, there are many reasons for the abnormal delivery, so it is difficult to immediately make a correct judgment when repairing, and the rapid judgment accumulated for several years is now Methods are introduced to colleagues for reference.
The key to eliminating such failures is to check them in a certain order. Do not use them blindly, or you will add a lot of unnecessary trouble to yourself. When the inspection is performed in the order of 1 to 6 below, it is necessary to immediately adjust the unsatisfactory area.
The TY615 must be adjusted during roller embossing and P615 is not required.
1 Jog machine, when the transfer paper row and the impression cylinder transfer the paper, when the impression roller reaches its maximum, as long as the open teeth of not less than 10mm, you can eliminate the small roller caused by tearing the situation of paper.
2 Check whether the roller visor force and opening and closing time are the same.
3 Check whether the time of tooth force and open and close teeth of the two sets of collection teeth are the same.
4 Check if the tightness of the 2 chains is appropriate (10mm gap between hand chain and rail).
5 imprint several sheets of paper, the paper should be parallel to the roller squeezing line, if you see the paper on the collection tooth row is not parallel to it, you can adjust the position of the delivery tooth row on the tooth base; Is it between 4 and 7mm (adjustable by the relative position of the delivery gear and the delivery shaft).
6 If the paper is like a arched bridge on the take-up row, it means that the track A of the take-up row is separated from the track B of the bowl, and the spacer between the take-up row and the chain seat can be set at each time. If the paper is like a cool clothesline bent down on the take-up tooth row, it means that the two tracks A and B intersect, and the spacer between the take-up tooth row and the chain seat can be appropriately added according to each situation. For example, if the paper is flat on the collection tooth row, it means that the two trajectories in B are tangent. This is the correct position for the transfer. When the paper is broken by a tooth chip, it will be smashed, indicating that the receiving tooth is in the row. When the transfer is too small, when the delivery is too large, the receiving tooth is too large, then the receiving tooth is not connected to the paper. The size of the receiving tooth can be achieved through the open tooth ball on the receiving tooth row and the receiving tooth pad. Distance to adjust.
When excluding the Y615 printer from a Hunan printer, it was found that the reason for not finding the torn paper was eliminated one by one according to the above steps. I reprinted some paper and found that the paper passed through the transfer table. The former regulations. The paper teeth row was not damaged by the impression roller, but the paper was found to have a longitudinal hole in a newly-replaced delivery tooth pad, and then the bad paper was taken to the delivery table. Moving the paper, when the roller grabbed the paper, I found that the longitudinal hole in the paper was also on the side of a tooth pad of the roller cavities, so I analyzed: Every tooth pad and take-up tooth row on the roller Each tooth pad on the tooth should have a certain distance from each other on the tangent line at the time of the transfer, and this machine has a roller pad and a tooth pad on the newly-received delivery line at the time of the transfer. Almost zero, resulting in bad paper, so I saw off the tooth pad on the tooth row 3mm, the tooth is also worn away 3mm, reprint, troubleshooting.