The majority of carton manufacturers have set printing, cutting, indentation production function in one of the printing and die cutting and slotting machine, simple operation, high automation degree, easy quality control, play a certain role in carton production process, but if the aging equipment, machine use improper adjustment, it is easy to appear some fault in printing, the production process of common printing problems encountered in the regular class analysis.
Layout quality problems appear dirty, paste version or local graphic imprinting is not clear
1, machine embossing related parts caused by bad quality failure
When a printing plate roller shaft, embossing roller shaft, drive shaft, gear and embossing associated important parts wear, loose, beating or sliding phenomenon resulting in nano imprint lithography process roll and embossing roll, the pressure instability, resulting in print layout and board contact is not normal, lead to paste version or local a scripture imprinted unclear problems cardboard printing surface. Through careful observation and analysis, find out the exact position of fault, take corresponding measures for treatment, repair of wear and tear, loose components, eliminating the fault phenomenon.
2, inking rollers caused by bad quality failure
When the roller shaft looseness, inking roller body bending, deformation or surface damage, can also cause the page dirty, paste version or local graphics and text is not clear. We should find out the reason, take the appropriate measures to deal with, so that the rollers and plates is maintained between the contact condition of uniform and appropriate, to replace damaged rollers, to eliminate the fault phenomenon.
3, pressure roller to adjust the quality failure caused by improper
If the pressure roller positioned too high or too low, so that with the corrugated board contact too tight or too loose, will also appear in the dirty version, paste version or local graphic imprinting is not clear, should adjust the pressure roller to the appropriate location, so that the gap between the board and the pressure roller and roller thickness to adapt, to ensure that the printed page the site, avoid the fault phenomenon.
Quality failure caused by improper 4, color sequence
If the printing layout is full text are arranged in the same group, when the process of corrugated board in the same group mechanism printing, because the board first in the same group of printing graphic inking, slow drying, extremely easy to make blot transfer caused Suites up dirty. To prevent this disease, should be small area layout in the same set of printing, the large area of the layout in the follow-up of color printing, can avoid the blot transfer caused by dirty version phenomenon.
Quality failure caused by uneven 5, plate thickness
When the rubber plate thickness is not uniform, a printing plate suites will appear high low. The layout of high place is easy to paste version, layout low place it is easy to appear over the insufficiency, caused the imprinting is not clear, in order to avoid the adverse situations, with sporadic seihan way, the plate is made into a plurality of small (that in order to save the rubber plate and no plate core plate technology), shall use the same block plates were produced, so that its thickness differences are relatively small. If you have already prepared rubber plate, presence of thickness difference, can make up for the localized in thin plate back more glue layer, so that the plates remain basically the same thickness, ensure the printing pressure and ink uniform layout.
Quality failure caused by uneven 6, corrugated cardboard thickness
If the depression traces forming the corrugated surface with man-made destruction, the sunken part of the paper will be imprinted quality defects is not clear, so if the total increase printing pressure compensation, easy to make the text, lines layout appear quality problem. In order to avoid layout paste, corrugated cardboard in stacked, handling process, should pay attention to light moving, light, light pressure (to control the stacking height), avoid the use of throw, hit, pressure and other adverse production customs handling.
Page graphic printing location not or unstable quality problem
The printing position, no 1 corrugated warp caused by
If the corrugated cardboard with warp adverse situation, then in the cardboard positioning and feeding process, prone to slipping phenomenon, even machine rules do not touch the paper edge, cause printing location not paperboard or unstable in print on the warpage of corrugated cardboard, as far as possible will be relatively flat edges, as the feed location. The edge of the paper. The most important is to control the quality of source, reasonable control of the single machine operation process, so that the speed and preheating temperature machine, paper moisture content and preheating area is relatively harmonious state; in the paper pay attention to moisture content is close to the liner board and corrugated sleeve mounted with synthetic, thus produced corrugated cardboard, flatness is relatively good, but the printing position accurately to ensure effective.
Printing location not caused by improper 2, operation process
If the plate location, also easy to cause the page printing location not. Because the warp defect of corrugated board has just entered the printing plate roller, such as slip trace, board support and shoot parts will appear obvious deviation, so the corrugated cardboard with color layout, should as far as possible toward the initial position of roller for paper orientation, and according to the determined corresponding measures to repair, remove loose components, in order to ensure corrugated cardboard printing position accurately.
3, the machine caused by inaccurate positioning
When the machine chain, rules and other components have loose phenomenon, also easy to cause the printed incorrect position, we should take corresponding measures to repair, remove loose parts, in order to ensure corrugated cardboard printing position accurately.
The quality problems often appear in print, some because of equipment caused by the poor, some are due to improper operation, so they should conscientiously do a good job of equipment maintenance, but also strict rules of correct, can effectively prevent or reduce the occurrence of poor quality problem, so that the production efficiency and product quality. Enhanced synchronously.
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