Adjustment of the position of the hottest folding

Adjustment of the position of the folding knife and the folding pinch roller

according to the mechanical principle, only when the length of the folding knife is equal to half of the distance from the center of the folding knife axis to the center of the folding drum axis, the movement track of the blade near the folding pinch roller is a triangular star curve, and the folding position is accurate. If the length of the folding knife is too long, the movement track of the blade at the folding pinch roll is a small circle, while if the length of the folding knife is too short, the movement track of the blade at the folding pinch roll is a small arc. During specific adjustment, the protruding height of the folding knife on the surface of the folding drum should be 40mm

adjustment of the position of the folding knife and the folding pinch roll

adjust the long hole screw on the driving gear of the folding knife shaft, change the position of the connection between the long hole and the screw, so as 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 pinch roll

when adjusting, apply ink to the blade of the folding knife, turn the folding roller, and check the coloring of the folding knife and folding pinch roller. Gb/t 2038 (1) 991 JIC test method for ductile fracture toughness of metal materials under the condition that the gap between the two folding clamping rollers is 0.2, although the sample size has changed by 0mm, it is appropriate that the folding clamping rollers on both sides of the folding knife are not colored. Since a newspaper has been folded into four layers here after being folded vertically and horizontally, the accuracy can meet the use requirements

adjustment of the folding line position of the folding knife on the newspaper

after the newspaper rotary machine is assembled, the distance between the cutting position of the newspaper and the pick-up needle has been determined. Adjusting the folding line position of the folding knife on the newspaper is actually adjusting the distance between the folding line of the folding knife and the pick-up needle hole

two folding knives at the symmetrical position of the folding drum are fixed on the folding drum by a unified support, with fixed screws on both sides of the drum, and positioning adjustment jackscrews on both ends of one of the folding knife shaft frames. When adjusting, loosen the fixing screw and the positioning adjusting jackscrew, and use the positioning adjusting jackscrew to make the two folding knives publicize the material at an equal distance from Lubrizol, which can be used to move the leather tube to the required position. After adjusting, tighten the jackscrew and screw again. When printing newspapers, the upper and lower alignment of folded newspapers when adjusted to the normal printing speed shall prevail. When the paper surface on the side of the needle pick hole is too short, the folding knife shaft support moves in the reverse direction of the folding drum; When the paper surface on the side of the needle picking hole is too long, move the folding knife shaft support towards the forward rotation direction of the folding drum. Note that there is a reference 0 point mark on the folding drum and the folding knife shaft support, align it with the 0 point mark, and the movement of both ends should be equal. When printing magazines that need to be bound, considering the need to minimize the amount of trimming, the paper side of the pick-up needle can grow 4mm

when adjusting the position of the folding line, although the front and rear positions of the folding knife on the folding drum are changed, the relative positions of the folding knife and the folding pinch roll are not affected. Because when the folding knife shaft support is moved, the transmission gear of the folding knife shaft also moves accordingly, and the whole planetary gear mechanism does not change. Therefore, the contact relationship of the folding knife when inserting between the folding rollers is not affected

because the position of the folding knife axis frame on the folding drum has changed, that is, the distance between the folding knife axis and the pick-up needle has changed, so the working relationship between the pick-up needle and the folding knife will change. When the pick-up needle carries a newspaper, it will have a certain impact, but it basically does not affect the folding quality. If necessary, you can also fine tune the needle picking cam to meet the working relationship between the needle picking and the folding knife. However, it should be noted that if the length of the paper on the needle side is adjusted according to the increase, the needle cam should be moved towards the forward rotation direction of the folding drum; If it is adjusted by reducing the length of the paper on the needle picking side, move the 7-digit needle cam of the picking accuracy towards the reverse direction of the folding drum