8 reasons for the most popular printing paper feed

2022-07-23
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The 8 reasons for the shift of printing paper feeding must be well understood

release date: Source: editor of global corrugating industry: litchi Views: 3020 copyright and disclaimer

core tip: paper feeding and moving is a common phenomenon in printing. Once paper feeding and moving occurs, carton forming and printing will encounter many problems. This article mainly introduces the 8 common causes of paper feeding movement, so as to help you understand the problems of paper feeding movement in production and apply the right medicine to the case

[China Packaging News] paper feeding is a common phenomenon in printing. Once paper feeding occurs, carton forming and printing will encounter many problems. This article mainly introduces the 8 common causes of paper feeding movement, so as to help you understand the problems of paper feeding movement in production and apply the right medicine to the case

1. The paper feeding rubber roller is seriously worn

after using the paper feeding rubber roller for a long time, the serious wear will cause the elasticity and pressure of the paper feeding rubber roller to change, which can not meet the friction during paper feeding

reminder: the equipment shall be carefully maintained at ordinary times. If the rubber delivery roller can not be used due to heavy wear in the tensile, contraction, zigzag, shear and other mechanical property tests of the sample, it shall be checked and replaced in time

2. Unqualified paper feeding rubber rollers used

paper feeding rubber rollers are vulnerable parts, and most of them are not guaranteed by the original manufacturer. After using the corrugated printing machine for a period of time, when the paper feeding rubber roller is seriously worn, in order to save costs, many customers often do not use the original rubber roller, but buy the paper feeding rubber roller from an unknown small factory, or find a small processing factory to process the old roller

since the paper feeding rubber roller operates at high speed, the original manufacturer has strict requirements on the material and design hardness of the rubber roller in order to ensure the stability and uniformity of the paper feeding pressure. Large manufacturers require wear resistance, temperature resistance, pressure resistance and other properties, while small manufacturers and customer maintenance personnel do not know much about this

(5) take out the test piece reminder: when purchasing equipment, be sure to select products from regular manufacturers. As the saying goes, the original key is better than the cheap one

3. Improper operation, the equipment operator improperly adjusts the gap between the paper feeding rubber roller and the paper feeding bottom roller

if the gap is adjusted too large, the contact between the paperboard and the paper feeding rubber roller is not close enough, and the friction is small, resulting in unstable paper feeding and inconsistent front and rear paper feeding positions; If the gap between the paper feeding cots is adjusted too small, it will make it difficult to feed the paper and it will not be transferred to the front printing unit normally

generally, these situations occur in inexperienced novices. They failed to correct the gap data between the paper feeding bottom roller and the paper feeding rubber roller after they replaced the paper feeding as a testing instrument and could not just look at the selling price of the rubber roller. As a result, the actual gap was inconsistent with the size that the computer could display (or dial), so the size of the rubber roller gap could not be set correctly

reminder: do a good job in training new employees and improve their operating skills

4. Paperboard indentation is too deep

the pressure adjustment of the paperboard production line is too large, resulting in too deep paperboard indentation. If the indentation is too deep, the paperboard thickness at the indentation will become thinner. During paper feeding, when the indentation is transferred to the intersection with the paper feeding rubber roller, the pressure of the rubber roller is insufficient and the friction is reduced. This will cause the paper feeding rubber roller and the paperboard to slip, causing the paper feeding position to shift back and forth

reminder: cardboard indentation should not be too deep

5. The paper feeding tire of the leading edge paper feeding platform is worn and aged or the paper feeding tire of the leading edge paper feeding platform is worn seriously, which will cause uneven paper feeding friction and paper feeding displacement. The use of inferior paper feeding tires will also affect the stability of paper feeding because of the great quality difference between the materials, hardness, size and specifications of the original sun tires and the original sun tires

reminder: timely check the paper feeding tire of the leading edge paper feeding platform

6. Improper setting of paper feeding suction air volume

the equipment with general paper feeding suction air volume is adjustable. At present, most of the variable frequency motor fans are used. If the cardboard is small and thin (less than 650mm in length and less than 3mm in thickness), the air volume setting should be smaller· Carbon fiber composite recycling process and current situation introduction too much air volume will lead to too tight adsorption, making the paperboard cling to the lattice sieve plate, causing resistance

reminder: for thin and small paperboard, the paper feeding suction air volume should be set smaller

7. Improper setting of paper feeding adsorption damper

the leading edge paper feeding platform is equipped with damper. In order to ensure uniform air suction, the opening of large cardboard and small cardboard dampers should be different. Do not close the air doors on both sides when producing large paperboard, resulting in insufficient adsorption wind and paper feeding out of position

reminder: when producing large paperboard, do not close the suction doors on both sides

8. Improper adjustment of the height of the dust removal brush

sometimes the operator will lower the position of the dust removal brush of the paper feeding unit to ensure the dust removal effect when producing thin paperboard. When we want to produce thick cardboard, we often do not remember to raise the position of the brush, resulting in the collision between the cardboard and the brush during paper feeding. The cardboard is subject to resistance and difficult to feed, so the paper feeding is out of position

reminder: when producing thick board, remember to raise the brush position

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