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棋牌游戏平台-威尼斯官方网站平台-登录印刷制作必要条件及注意事项?

来源:   日期:2021-03-12

首先印刷两次,观察套印精度,印刷厂小编对侧规拉纸力,进纸、压纸轮、压纸机件进行检查调节。然后检查橡皮布的张力,新的橡皮布容易松弛,注意分次收紧,但也不可过于绷紧。再检查滚筒包衬和印刷压力。
First, print twice, observe the overprint accuracy, check and adjust the side gauge pulling force, paper feeding, paper pressing wheel and paper pressing machine. Then check the tension of the blanket. The new blanket is easy to relax. Pay attention to tighten it by stages, but it should not be too tight. Check the drum lining and printing pressure again.
再降低油墨的黏度。油墨黏度高,纸张不能顺利剥离橡皮布,使纸张的拖梢部分不稳定,从而产生重影。可以适当降低油墨的黏度。然后就是叼牙的调节。叼牙的调节不良和保养不当是造成重影的一大原因。因此应定期做好叼牙的调节和维护检查,使之经常保持良好的工作状态。
And then reduce the viscosity of the ink. Ink viscosity is high, the paper can not be smoothly stripped blanket, so that the tip of the paper is unstable, resulting in ghosting. Can be appropriate to reduce the viscosity of the ink. Then there is the adjustment of the teeth. The poor adjustment and improper maintenance of the teeth are the main causes of the double image. Therefore, it is necessary to adjust and maintain the teeth regularly to keep them in good working condition.
1.注意观察样张
1. Pay attention to the sample
首先在印刷中抽样检查。进入正式印刷后不久,在开印时确定的供墨量、上水量多少会有些变化,应频繁抽样检查,进行再调整。在印刷速度保持不变,供墨量和上水量等都处于稳定的状态时,按每印500~1000张/次的比例进行抽样检查。然后再印刷的印品中插入警示纸条。以方便于在后工序中进行检查。
First, sample inspection in printing. Shortly after entering the formal printing, the ink supply and water supply determined at the start of printing will change, so it is necessary to conduct frequent sampling inspection and readjustment. When the printing speed remains unchanged and the ink supply and water supply are in a stable state, the sampling inspection shall be carried out according to the proportion of 500 ~ 1000 sheets per printing. Then insert a warning note into the printed product. In order to facilitate the inspection in the later process.
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2.印刷厂印刷初期需要注意上水量的变化
2. In the early stage of printing, the printing factory should pay attention to the change of water loading
首先注意正式印刷初期上水的变化。试印时的上水量和进入正式印刷后的上水量多少都会有些变化,一定要一边注意观察样张有无重影、水扛子,一边注意调解印版的给水量。其次需要注意正式印刷过程中上水的变化。要密切注意机器主体发热和车间内的通风状况给上水带来的影响,酒精润版要注意润湿系统冷却装置,控制好润湿液的温度,上水过少,会使印版起脏;上水过多将引起油墨乳化,会带来一系列问题。
First of all, pay attention to the change of water filling in the early stage of formal printing. There will be some changes in the amount of water applied during the trial printing and after the formal printing. Be sure to observe whether the sample sheet has ghosting and water bearing, and adjust the amount of water supplied to the printing plate at the same time. Secondly, we need to pay attention to the change of water supply in the process of formal printing. Pay close attention to the influence of the heating of the main body of the machine and the ventilation of the workshop on the water supply. Pay attention to the cooling device of the wetting system and control the temperature of the wetting liquid. Too little water supply will make the printing plate dirty; too much water supply will cause ink emulsification, which will bring a series of problems.
3. 印刷初期需要注意印刷油墨的变化、
3. Pay attention to the change of printing ink in the early stage of printing
首先需要注意墨斗的油墨。墨斗的油墨从墨斗辊和墨斗刮刀之间的缝隙传出,是由油墨的自重而自然被挤压出来的。因此,墨斗中油墨量的多少,直接影响油墨的输出量。另外,印刷油墨具有触变性质。要经常用墨刀在墨斗中搅拌,或者安装油墨搅拌器。
First of all, we need to pay attention to the ink of the ink bucket. The ink of the ink bucket comes from the gap between the ink bucket roller and the ink bucket scraper, which is naturally squeezed out by the weight of the ink. Therefore, the amount of ink in the ink bucket directly affects the output of ink. In addition, printing ink has thixotropic properties. Always use an ink knife to stir in the ink bucket, or install an ink mixer.
其次需要防止油墨在机器上干燥。并且需要注意油墨均匀,印刷品的密度视上水量、室温、机器速度不同而发生变化。应经常与标准样张进行对比检查。注意防止出现墨色不均匀现象。从而保持润湿液的pH值,油墨中添加了辅助剂后,容易影响润湿液的pH值,如pH值增 大则易造成印版起脏,因此要特别注意。
Second, the need to prevent ink drying on the machine. And need to pay attention to ink uniformity, printing density depends on the amount of water, room temperature, machine speed and change. It should be compared with the standard sample sheet frequently. Pay attention to prevent uneven ink. So as to maintain the pH value of the wetting solution, after the auxiliary agent is added to the ink, it is easy to affect the pH value of the wetting solution. If the pH value increases, it is easy to cause the printing plate dirty, so special attention should be paid to it.
4.印刷过程中需要注意背面蹭脏
4. Pay attention to the dirt on the back during printing
背面蹭脏是由于油墨干燥缓慢、图文墨层过厚、纸张平滑度高等原因,使印张表面的油墨粘到上一张印张的背面的现象。
Back rub dirty is due to slow ink drying, graphic ink layer is too thick, paper smoothness and other reasons, so that the ink on the surface of the sheet stick to the back of the previous sheet.
5.如何避免重影故障以及处理方法
5. How to avoid ghosting and how to deal with it
所谓重影就是用一块印版印出的图像错移,在印张上能够看到双重、三重的图影。重影的原因有多种,比如纸张、叼牙、滚筒、橡皮布、印速、油墨黏度等各种因素非常复杂。一般可以采用一下几个方法来检查原因并处理。
The so-called double image is to use a plate to print the wrong image, in the sheet can see double, triple image. There are many reasons for ghosting, such as paper, teeth, roller, blanket, printing speed, ink viscosity and other factors are very complex. Generally, the following methods can be used to check the causes and deal with them.
感谢您的阅读,希翼以上内容对您有所帮助,如您想了解更多精彩内容请点击大家的官网:棋牌游戏平台
Thank you for your reading. I hope the above contents will be helpful to you. If you want to know more wonderful contents, please click our official website: Jinan printing factory   .


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