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What is the improvement process of corrugated board direct flexo printing?

1．柔性版直接印刷紙箱生產(chǎn)的工藝流程

1. Process flow of flexographic direct printing carton production

瓦楞紙板生產(chǎn)一紙板直接印刷（柔性版）。模切開槽_÷黏合釘箱。常規(guī)的柔版印刷瓦楞紙箱工藝是直接在瓦楞紙板上進(jìn)行印刷，使用的是水性油墨，目前在我國的紙箱廠中應(yīng)用很廣泛。

Corrugated board produces a cardboard direct printing (flexo). Die cutting slotting_ Adhesive nail box. The conventional flexographic printing technology of corrugated box is printing directly on corrugated board, using water-based ink, which is widely used in China's carton factory.

2．桑性版直接印刷優(yōu)點(diǎn)

2. Advantages of direct printing

(1)幅面大，寬幅的柔性版印刷機(jī)大幅寬可達(dá)2.5~2.8m。

(1) Large format, wide flexographic printing press, wide width up to 2.5 ~ 2.8m.

(2)低，柔印版耐印力很高，可重復(fù)使用。

(2) Low price, flexographic version of high printing resistance, can be reused.

(3)紙箱生產(chǎn)工藝簡單，可以聯(lián)動(dòng)生產(chǎn)，如印刷、開槽、壓痕、

(3) Carton production process is simple, can linkage production, such as printing, slotting, indentation

釘（粘）箱、打捆等一機(jī)即可完成；但生產(chǎn)效率高，成本低。

Nailing (gluing) boxes and bundling can be completed by one machine, but the production efficiency is high and the cost is low.

(4)柔印是輕壓印刷，對瓦楞紙板的強(qiáng)度影響較小。

(4) Flexo printing is light press printing, which has little influence on the strength of corrugated board.

(5)使用水性油墨，，油墨較低。

(5) The use of water-based ink, environmental protection and safety, ink price is low.

(6)印刷設(shè)備原理簡單，易于操作，對印刷面保護(hù)較好。

(6) The principle of the printing equipment is simple, easy to operate, and the printing surface is well protected.

3．缺點(diǎn)

3. Disadvantages

(l)瓦楞紙板較厚，在印刷中變化因素多，控制較難，印刷精度

(l) Corrugated board is thick and has many factors in printing, so it is difficult to control and the printing accuracy is low

不高。

It's not high.

(2)多色印刷品質(zhì)較差。

(2) The quality of multicolor printing is poor.

(3)印刷壓力控制較難，易造成紙板強(qiáng)度下降。 為實(shí)現(xiàn)高品質(zhì)的印刷，要綜合考慮可能影響印刷的各種因素，使之達(dá)到優(yōu)組合。柔版印刷效果由五大要素來決定：操作人員、印刷機(jī)械、承印材料、印版和油墨。這五種要素是保證印刷產(chǎn)品高品質(zhì)的

(3) It is difficult to control the printing pressure, which is easy to reduce the strength of the paperboard. In order to achieve high quality printing, it is necessary to comprehensively consider various factors that may affect the printing, so as to achieve the optimal combination. Flexographic printing effect is determined by five factors: operator, printing machine, substrate, plate and ink. These five elements are the key to ensure the high quality of printing products

關(guān)鍵。

The key.

4．柔印版材的使用

4. Use of flexo plate

在瓦楞紙板柔版直接印刷工藝中，對版材的選擇非常關(guān)鍵，直接柔印版材根據(jù)厚度不同，可分為三種，即普通版材、薄型版材和超薄型版材。

In the flexographic direct printing process of corrugated board, the selection of plate material is very important. According to the thickness, the direct flexographic plate can be divided into three types: ordinary plate, thin plate and ultra-thin plate.

(1)普通版材。普通版材的厚度為3.94 -7.OOmm。這種印版由黏版膠直接貼在印版滾筒上。在瓦楞紙板印刷中，由于瓦楞紙板本身的特點(diǎn)，采用這種版材會(huì)對印刷造成較大影響，主要表現(xiàn)為影響套印精度，實(shí)地印刷中間部分密度不足，易造成

(1) Common plate. The thickness of ordinary plate is 3.94-7.oomm. This kind of plate is pasted on the plate cylinder directly by the adhesive. In corrugated board printing, due to the characteristics of corrugated board itself, the use of this plate will have a greater impact on printing, mainly for the impact of overprint accuracy, the lack of density in the middle part of the field printing, easy to cause problems

網(wǎng)點(diǎn)、文字和線條的擴(kuò)大變形等。

Dot, text and line expansion and deformation.

(2)薄型版材和超薄型版材。薄型版材的厚度為2.84 –3. 94mm，超薄型版材的厚度小于2.84mm。這兩種版材統(tǒng)稱為薄型

(2) Thin plate and ultra-thin plate. The thickness of thin plate is 2.84 – 3.94mm, and the thickness of ultra-thin plate is less than 2.84mm. These two plates are collectively referred to as thin

版材，該版材一般要與襯墊組合一起使用才能獲得效果。弋墊式襯版技術(shù)是目前應(yīng)用較多的襯墊技術(shù)，由于其襯墊材料柔性高

Plate, the plate is generally used together with the pad in order to obtain high quality effect. At present, pad technology is widely used in pad technology, because of its high flexibility of pad material

于樹脂版或橡膠版2 -10倍，所以具有彈性好、不變形、受壓復(fù)原快的特點(diǎn)。采用該氣墊襯版，能吸收瓦楞紙板、印版和印版輥之間產(chǎn)生的壓力，可有效防止印版的變形和紙板損壞，使傳墨更均勻，有效控

In the resin version or rubber version 2 - 10 times, so with good elasticity, no deformation, compression recovery fast characteristics. The air cushion liner can absorb the pressure between the corrugated board, the printing plate and the printing plate roller, effectively prevent the deformation of the printing plate and the damage of the paperboard, make the ink transfer more uniform and effectively control the pressure

制網(wǎng)點(diǎn)擴(kuò)大，壓印點(diǎn)面適印性更大，印刷圖像層次更清晰。R/bak氣勢式襯版的主要特點(diǎn)：減少印刷點(diǎn)面壓力，有效控制網(wǎng)點(diǎn)擴(kuò)大；避免印版變形，延長印版使用壽命；對于跳動(dòng)過大的印版輥有獨(dú)特的補(bǔ)償作用；對于低品質(zhì)的瓦楞紙板有良好的適印性，并能避免損壞瓦楞紙板；可提高傳統(tǒng)印刷設(shè)備的印刷檔次。

The printing dot is enlarged, the printability of the embossing dot surface is greater, and the printing image level is clearer. The main features of R / bak momentum type liner are as follows: reduce the pressure of printing dot surface, effectively control dot expansion; avoid plate deformation, extend the service life of plate; have a unique compensation function for plate roll with excessive beating; have good printability for low-quality corrugated board, and avoid damaging corrugated board; can improve the printing grade of traditional printing equipment.

R/bak氣墊式襯版技術(shù)是目前瓦楞紙箱印刷中應(yīng)用廣泛的一項(xiàng)成熟技術(shù)，被大家視為一種提高瓦楞紙箱印刷品質(zhì)的為直接、效果為明顯的解決辦法。氣墊式襯版技術(shù)正在逐步取代傳統(tǒng)的厚型印版。

R / bak air cushion liner technology is a mature technology widely used in corrugated box printing, which is regarded as a direct and obvious solution to improve the printing quality of corrugated box. Air cushion technology is gradually replacing the traditional thick plate.

應(yīng)盡可能使用薄版，與厚印版相比，薄版不僅可以進(jìn)行平整的實(shí)地印刷，而且網(wǎng)點(diǎn)擴(kuò)大量小，套印精度高，印刷品質(zhì)穩(wěn)定，圖像層次更精細(xì)，而用厚版印刷，印刷壓力過小時(shí)，瓦楞紙板易產(chǎn)生瓦楞狀和“搓板”樣圖案，而且影響實(shí)地及精細(xì)線條；印刷壓力過大時(shí)，瓦楞紙板易變形甚損壞，同時(shí)樹脂版印版變形，印刷網(wǎng)點(diǎn)擴(kuò)大，厚版則網(wǎng)點(diǎn)擴(kuò)大量大。

Thin plate should be used as much as possible. Compared with thick plate, thin plate can not only carry out flat field printing, but also has a large number of small dot expansion, high overprint accuracy, stable printing quality, and more fine image level. However, with thick plate printing, corrugated board is easy to produce corrugated and "washboard" like patterns when the printing pressure is too small, which affects the field and fine lines, Corrugated board is easy to be deformed or even damaged. At the same time, the resin plate is deformed and the printing dot is enlarged, while the thick plate has a large number of dot.

所以瓦楞紙板品質(zhì)較差時(shí)，應(yīng)選用厚度較厚、硬度較低的版材；瓦楞紙品質(zhì)較好、需印刷小字、網(wǎng)線版時(shí)，應(yīng)選擇肖氏硬度為35 -45的薄版。

Therefore, when the quality of corrugated board is poor, the plate with thicker thickness and lower hardness should be selected; when the quality of corrugated paper is good, small characters and screen plate need to be printed, the thin plate with shore hardness of 35-45 should be selected.

實(shí)踐中發(fā)現(xiàn)，同一印版在不同的印速時(shí)，印跡的虛實(shí)也不同。其規(guī)律是在同等條件下，印速高時(shí)印跡顯得較實(shí)，反之，則較虛。原因是柔印版的彈性形變和受力時(shí)間成正比，所以同塊版在低速印刷時(shí)彈性形變較高速時(shí)大。

In practice, we found that the same plate at different printing speed, the virtual and real imprint is also different. The rule is that under the same conditions, when the printing speed is high, the imprint appears more solid, otherwise, it is more virtual. The reason is that the flexographic plate's elastic deformation is directly proportional to the stress time, so the same block plate's elastic deformation is larger at low speed than at high speed.