Newspaper rotation printed machine
The newspaper rotation has two different ways of horizontal folding, one is a shock -type fold, and the other is a splint fold. Because impact folding has the advantages of simple structure and convenient adjustment, it is widely adopted by newspaper rotations. Although the impact folding pages also have changes in the operating speed of a machine, the position of the folding position on the newspaper product will change, especially when the newspaper printing ink is large. For newspapers with high quality requirements, as long as the problem is not very serious, these shortcomings of impact folding machines will be covered by its advantages.
The work process of impact folding is as follows:
① After the printed paper belt is folded through the triangular board, the possibly picked needle is hooked by the guidance roller and the paper roller;
② Pass the paper belt between the folding roller cutting knife pad and the cutting drum cut cutting knife.
③ The planetary folding knife on the folding drum inserts the newspaper into a pair of folding clip rollers to complete the horizontal discount;
④ The folding newspaper fell into the wing wheels from the folding roller and was sent to the conveyor belt.
To use the impact folding machine, the key is to make adjustments to the folding drum, but this is also difficult to master. Let ’s take an introduction based on the II impact folder of the Gaussian metropolis.
1. The relative position adjustment of the folding roller and the cutting drum
During assembly, the cutting knife pad of the folding drum should be faced with the jagged cutting knife on the tailor. The folding roller and the cutting drum are driven by a pair of mutually meson gears. The cutting drum is connected with the transmission gear as the key. Adjust the purpose of the relative position of the folding drum and the transmission gear. Its trace adjustment can be achieved by changing the distance between the pinhole and the cut edge, but it does not advocate adjustment here in actual production.
2. Adjust the needle
The telescopic movement of the needle is controlled by the cam on the drive side. The expansion itinerary of the needle is determined by the cam. In order to ensure that the needle picking the needle can completely shrink back the inside of the folding drum, the height of the surface of the folding roller should be smaller than the telescopic itinerary of the pin. Measure the height of the stretch of the needle to extend the folding drum to the maximum volume of the possibility, so that the surface height of the folding drum surface is 6mm as the standard. In actual production, according to the requirements of different thickness, you can fine -tune the height of the needle.
During the folding process, the needle picking the needle is extended in advance. With the rotation of the folding drum, the stretched needle will be pierced into the paper belt. Therefore Consider the moment of picking the needle. However, when the folding knife inserts the newspaper into the folding roller, the needle must be retracted in time, that is, the indentation of the needle must be accurate, otherwise it will be torn out of the paper due to the extension of the folding knife. It also makes the paper out of control for a period of time, affecting the folding accuracy. In addition, the indentation process of picking should also be quickly coordinated with the movement of the needle with the planet folding knife. When adjusting, let go of the rotor cam fastened by the transmission side, otherwise if it shrinks too early, it will make the possibly camflow of the folding roller move, and it will be too late and will make the needle camfrole toward the roller. The reversal direction moves.
3. Adjust the height of folding knife
The main axis of the folding knife is to operate the gear for the planetary movement by the folding drum. The transmission of the folding knife and the rotation is represented by the relationship between the solar wheel and the number of planet wheels. Because the rotation of the folding knife is actually the planet wheel rotation, and the folding knife rotation is the rotation of the folding drum, so that the folding drum is turned out for each week, the folding knife extends 3 times in total, and the phase difference between the three times is 120 °, only downward, only downward downward. The extension was extended to the middle of the folding roller to complete the horizontal folding action.
According to the mechanical principle, only when the length of the folding knife is equal to half the distance between the center of the folding knife to the center of the folding drum shaft, the motion trajectory of the blade near the folding roller is the triangular star curve, and the seam position is accurate. If the length of the folding knife is too long, the sports trajectory of the blade at the folding roller is a small circle, and the length of the folding knife is too short. When the specific adjustment, the height of the folding knife on the surface of the folding drum is 40mm.
4. Adjustment of the position of the folding knife and the folding clip roller
Adjust the long -hole screws on the transmission gear of the folding knife to change the position of the long hole and the screw connection to change the phase of the folding knife, so as to achieve the purpose of adjusting the relative relationship between the folding knife and the folding clip roller.
When adjusting, apply ink on the blade of the folding knife, rotate the folding drum, and check the color of the folding knife and the folding clip roller. Under the condition of 0.20mm between the two -fold page roller, it is advisable to use the folding roller on both sides of the folding knife. Since a newspaper has been folded into 4 layers after a long time and horizontal folding, the accuracy can meet the requirements of the use.
5. Adjust the position of the folding line on the newspaper
After assembling the rotary of the newspaper, the distance between the cutting position of the newspaper and the needle picking is determined. Adjusting the position of the folding line on the newspaper is actually the distance between the folding knife and the pinhole.
The folding knife on the two folding drum symmetrical positions is fixed on the folding drum by a uniform bracket. There are fixed screws on both sides of the drum, which is positioned to adjust the top wire at both ends of the folding knife shaft. When adjusting, loosen the fixed screw and positioning adjustment, and use the positioning to adjust the top wire to move the two folding knives at the required position. After adjusting Essence When printing in newspapers, the newspapers that are adjusted to normal printing speeds are subject to alignment. When the paper side of the pinhole is too short, the folding knife shaft bracket moves towards the reversal direction of the folding roller; when the paper side of the pinhole side is too long, the folding knife shaft bracket facing the front direction of the folding drum. move. Note that there is a benchmark 0 point mark on the folding drum and a shaft bracket, and the 0 -point mark is aligned. The amount of movement at both ends should be equal. When printing a magazine that requires binding, considering the need to minimize the amount of repair, the paper side of the needle can grow 4mm.
When adjusting the folding position, although the folding knife is changed on the front and rear positions of the folding drum, it does not affect the relative position of the folding knife and the folding roller. Because when the folding knife axis bracket, the transmission gear of the folding knife is also moved accordingly, and the entire planet wheel mechanism has not changed. Therefore, the contact relationship between the folding knife during the folding roller is not affected.
Due to the changes in the position of the folding knife axis on the folding drum, that is, the distance between the folding knife shaft and the needle has changed, so that the working relationship between picking the needle and the folding knife will change. There will be a certain impulse, but basically it does not affect the quality of the fold. If necessary, you can also fine -tune the acupuncture cam to satisfy the working relationship between the needle and the folding knife. However, it should be noted that if the length of the paper picking side paper is adjusted, it should be moved to the forward rotation direction of the tent of the tent of the piping of the needle; The needle cam moves towards the reversal direction of the roller.