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影响柔版印刷品中套印不准三大原因
作者:admin 来源:http://www.sdhzyw.com 发布时间:2016-5-24 10:01:12 浏览次数:342
1.张力控制
1 tension control
在印刷过程中,由于张力不稳定,容易出现大量废品,所以纸带的张力要严格控制好。一般在机器的放卷和收卷处都分别有一个磁粉张力控制器和一个张力驱动辊,并且都有张力显示。因为纸带有接头,每次接头过来,张力总会有波动,可以提前打规,减少废品量。
In the printing process, due to tension instability, prone to a lot of waste, so the paper tape tension should be strictly controlled. A magnetic powder tension controller and a tension drive roller are respectively used for the general and the coiling of the machine. Because the paper has joints, each joint over, there is always tension fluctuation, can play the rules in advance, reduce the quantity of waste.
如果要更换印刷活件,若新换上的纸带较宽些,常常会由于前面窄一点的纸带对张力驱动辊的磨损,换上的宽纸使胶辊的中部形成架桥效应,纸带的两边紧,中间松,对后面的分切机组造成很大影响,这时需要更换胶辊,或将旧的胶辊表面磨平也可继续使用。另外气涨心轴用久了也会变松,要勤检查。
If you want to replace the printing job, if the new change on the tape is more wide, often due to narrow in front of a tape to tension the drive roller wear, put on the paper width the rollers in the middle of the bridging effect, on both sides of the paper tape tight, loose in the middle, on the back of the cutting unit has a great impact, then need to replacement cots, or will the old roller burnishing surface can also continue to use. The other two up mandrel with long will become loose, frequently check.
⒉ 保证印版精度,装版对位准确
The guarantee plate precision, accurate Edition
在装版时,一般都是采用手工贴版,需要很高的熟练程度,必须让印版的边线与印版滚筒的轴线平行,且接缝处要尽量紧密,否则在接缝处易引起版滚跳动。若单独更换某块印版,常常由于制版时间不同而使印版套印不准,这时可用电吹风将版吹软,再将其纵向或横向拉伸,与其他印版保持一致。
When the plate is installed, usually by hand paste version, need high proficiency must let the plate edges and a printing plate cylinder parallel to the axis of the, and the seams to try to stay as close as possible, otherwise in the seams easily cause edition roll beat. If separate replacement a piece of plate, often due to the different plate making time and make the printing plate misregister, then hair dryer available will version soft blowing, the longitudinal or transverse tensile, consistent with the other plate.
⒊ 定速印刷
3 printing speed
对于大批量的印件,在工艺比较成熟的条件下,宜采取定速印刷,这样干燥装置对纸张变形的影响就比较一致,容易套印。其他诸如油墨粘度、张力设定等工艺参数都可有一固定范围,使质量可以得到保证。
For high-volume print, in technology more mature conditions, should take constant speed printing, such drying apparatus, the paper deformation effect is more consistent, easy to overprinter. Other process parameters such as ink viscosity, tension setting can have a fixed range, so that the quality can be guaranteed.
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The Jinan's propaganda single page printing friendship devotion. More knowledge about please click: attitude of http://www.sdhzyw.com most sincere. For you to provide the most comprehensive services. More relevant knowledge and we will continue to everyone dedication. Stay tuned.