Causes and elimination of ink sticks in the process of CD printing

The ink color of the horizontal stripe shadow on the printed page is obviously darker than the ink color of other parts, which belongs to the ink bar. The reason for the ink bar and the method of elimination:

1. Ink bars caused by brake strips

When the contact pressure between the rubber roller and the brake strip is too large, then when the ink roller is in contact with the brake strip during the operation of the machine, impact wear will occur. For this, the contact pressure between the rubber roller and the printing plate should be adjusted to maintain uniformity 1. Moderate contact conditions, after removing excessive resistance, the ink bar can be better eliminated. When the brake bar is badly worn, replace a section of about 40mm at the front end.

2. Ink bar caused by rubber roller

When the contact pressure between the rubber roller and the printing plate is too large, then when the ink roller and the printing plate are in contact with the roller brush during the operation of the machine, it is easy to produce shock and cause tremor, so that the increased friction causes streaking. If the pressure of several inking rollers by the format is too large, the density of the streak marks will be greater. In this regard, the contact pressure between the rubber roller and the printing plate should be adjusted to maintain uniform and moderate contact conditions. After removing excessive resistance, the ink bar can be better eliminated.

3. The roller gear is worn, the gear gap is too large, or there is foreign matter accumulation between the gears

When the roller gears are worn, or there is adhesion of foreign objects between the teeth, during the operation of the machine, the roller gears cannot be accurately meshed, so that the linear speed between the rollers is not consistent. In addition, if the tooth gap is too large, the cylinder is also prone to tremor and jitter, forming printed bar marks, so that there are ink bar marks on the printed board surface that are close to the gear pitch. There is a foreign object obstacle in the tooth gap, and it is easy to cause the roller to tremble due to the "top tooth" phenomenon, so that the horizontal layout of the printed product forms a strip-shaped ink bar. In this regard, the center distance between the rollers should be readjusted to reduce the gap between the teeth; the gears with severe wear should be replaced with new gears; the adhesion of foreign objects between the teeth should be cleaned to achieve the effect of eliminating ink sticks.

4. The roller bearing has large wear

When the roller shaft head runs short of oil or the machine wears naturally for a long time, the gap between the roller shaft head and the bearing is increased, the cooperation is poor, and the ink stick marks are caused by vibration when the pressure is combined. In this regard, it is advisable to make the grip of the rubber inner liner trapezoidal to reduce the impact during the imprinted state and reduce the degree of ink stick marks. In addition, if the roller bearing is seriously worn, it should be considered to repair or replace the new bearing to eliminate the traces of ink sticks.

5. The plate cylinder or rubber cylinder is too large

If these two conditions exist, the stripe ink stick marks will be caused by the inconsistent linear velocity on their surface. At the same time, due to the impact vibration of the cylinder during imprinting, the friction between the two cylinders during vibration will easily cause friction and cause ink marks. In addition, because the imprint on the bite part is not obvious (the pressure is light), if the pad is too much, it may also cause ink sticks. In this regard, the thickness of the liner should be accurately adjusted, and the minimum printing pressure should be used as far as possible to make the ink layer transfer evenly, so as to maintain the consistency of the surface linear speed between the rollers as a prerequisite. When adding paper strips to the bite area, the method of gradually heating the pad should be used. Do not pad more than one at a time to avoid ink stick marks.

6. Blanket (rubber cloth) is loose

When rolling, it is easy to produce sliding friction, so there are traces of ink sticks. Therefore, measures should be taken in time for tightening to prevent printing ink sticks.

7. When the self-adhesive Blanket (rubber cloth) is replaced, the old primer has not been cleaned, and the local pressure is inconsistent, causing ink stick marks.

China Back Posture Corrector,Posture Corrector,Posture Corrector Brace,Correct Belt, we offered that you can trust. Welcome to do business with us. The type of the posture corrector can be various for the customers to choose from, they can well protect the customers' shoulder and back. It is ideal for shoulder support, upper back & neck pain relief.  The brace has high elastic performance. 

It makes you look confident and powerful

It improves bodily alignment

Eliminates back and neck pain

Improves breathing

Improves memory and learning

Makes you look taller, slimmer and attractive.

Back Support Brace for Women and Men b

Back Support Brace for Women and Men b

Posture Corrector

Back Posture Corrector,Posture Corrector,Posture Corrector Brace,Correct Belt

Yangzhou Sainuo Star Sports Products Co., Ltd. , https://www.cnsportsgoods.com

Posted on