What are the pre printing process and operation points of corrugated box? Now let's listen to the detailed introduction of industry experts.

凹版印刷紙箱預印是將瓦楞紙箱在作成瓦楞紙板之前預先采用凹版印刷技術，在寬幅卷筒紙（紙箱面紙）上預先印刷好所需的精美圖案，將卷筒狀印刷好的面紙上瓦楞紙板生產(chǎn)線做成瓦楞箱板，再用模切機模切壓痕成箱型。

Intaglio printing carton preprint is to use intaglio printing technology in advance before making corrugated carton into corrugated board, pre print the required exquisite patterns on wide web paper (carton face paper), make the corrugated board production line on the web printed face paper into corrugated box board, and then use the die-cutting machine to cut and indentation into box shape.

卷筒紙凹版印刷預印技術的工藝流程為：凹版印刷機印刷面層紙卷→紙板線生產(chǎn)裁切成三層（或五層）紙板→模切壓痕成型→釘箱/粘箱。

The process flow of Web intaglio printing preprint technology is as follows: intaglio printing machine printing surface layer paper roll → paperboard production line cutting into three (or five) layers of paperboard → die cutting and indentation molding → nail box / stick box.

凹版預印的主要原因有二，其一是凹印能夠輕松提供高質(zhì)量的彩色印品；其二是電子雕版技術使金屬版輥的制作周期和成本大幅度下降，接近甚于柔性版。國內(nèi)陜西北人已生產(chǎn)出高速寬幅紙凹機，只及進口柔性版印刷機的三分之一，采用凹版預印方式可能更適合我國包裝企業(yè)的實情。預印具有以下一些優(yōu)點：

There are two main reasons for gravure pre printing. One is that gravure printing can easily provide high-quality color prints; The second is the electronic engraving technology, which greatly reduces the manufacturing cycle and cost of metal plate roller, which is close to or even lower than that of flexible plate. The domestic beiren of Shaanxi Province has produced high-speed wide width paper concave machine, and the price is only one third of that of imported flexographic printing machine. The use of concave preprint may be more suitable for the actual situation of packaging enterprises in China. Preprint has the following advantages:

其一是可獲得更高的印刷質(zhì)量，適應性更廣。國內(nèi)生產(chǎn)的紙張凹印油墨已經(jīng)比較成熟，已經(jīng)制造出能滿足瓦楞紙板線預印用的水性紙張凹印油墨，可以滿足瓦楞紙板生產(chǎn)線上180℃高溫和熱板磨擦。進行大幅面多色彩色印刷。傳統(tǒng)彩色膠印zui大幅面一般可1.2m×0.9m（大全張），多為四色印刷，紙箱預印用機組式凹版印刷機zui大印料幅寬為2.5米（包括1300mm、1650mm、1800mm、2000mm、2200mm、2500mm），印刷色數(shù)可達4-10色組，同時還可進行金墨、銀墨等特殊油墨的印刷。

First, it can obtain higher printing quality and wider adaptability. The paper gravure printing ink produced in China has been relatively mature, and the water-based paper gravure printing ink that can meet the pre printing of corrugated board line has been manufactured, which can meet the high temperature of 180 ℃ and hot plate friction of corrugated board production line. Large scale multi-color printing. Traditional color offset printing Zui large format can generally be 1.2m × 0.9m (large full sheet), mostly four-color printing. The carton pre printing uses the unit gravure printing machine Zui. The width of the large printing material is 2.5m (including 1300mm, 1650mm, 1800mm, 2000mm, 2200mm and 2500mm). The number of printing colors can reach 4-10 color groups. At the same time, it can also print gold ink, silver ink and other special inks.

其二是可使瓦楞紙板獲得zui高強度，由于預印刷不用在紙板成型后壓印，可避免造成瓦楞變形和紙板強度減弱。由于預印用生產(chǎn)瓦楞紙箱是在生產(chǎn)線上完成的，在制作時有一定的加熱成型時間，zui終生產(chǎn)的瓦楞紙箱強度高，可以避免貼面機生產(chǎn)時產(chǎn)生的涂膠不勻、紙箱起筋，紙板翹曲等現(xiàn)象。

The second is that the corrugated board can obtain Zui high strength. Because the pre printing does not need to be embossed after the forming of the board, the corrugated deformation and the weakening of the strength of the board can be avoided. As the production of corrugated boxes for pre printing is completed on the production line, there is a certain heating and forming time during the production. The corrugated boxes produced by Zui final production have high strength, which can avoid the phenomena of uneven gluing, stiffened cartons and warped cardboard produced by the veneering machine.

其三是生產(chǎn)效率高，便于生產(chǎn)管理，廢品率等。大型和異型紙箱的印刷，適合大批量的長版印刷。預印用版均采用的是鋼制鍍鉻電雕凹版，耐印次數(shù)為300萬-400萬印，減小了換版時間，適合大批量長版活的印刷。

Third, high production efficiency, easy production management and low scrap rate. The printing of large and special-shaped cartons is suitable for large-scale long plate printing. The pre printing plates are made of steel chrome plated electric engraving intaglio plates, with printing resistance of 3-4 million prints, which reduces the plate change time and is suitable for large quantities of long plate printing.

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