Pre-printing - High-volume, high-quality ink color carton production solutions

一、Introduction to preprinting

Preprinting, as the name suggests, is to print the desired pattern in advance before the corrugated board is made.

The traditional method for producing color corrugated cartons is to first print on a single-sheet paper using offset printing, and then use a veneer to attach the printed glossy paper to corrugated cardboard and die-cut into various box shapes. Its production process is as follows:

Offset printing paper (sheet paper) -

Making corrugated cardboard (single sheet) - Veneer veneer - Die cutting

The method of producing pre-printed color corrugated cartons is to use a large gravure printing machine to print on the web, and after printing, the web is still received into a web, and the printed web is used as a carton-covered paper on a corrugated paper production line. Made of corrugated cardboard boxes, and then cut into boxes with a die cutter. Its production process is as follows:

Gravure Printing Face Paper (web) - Production of Corrugated Cardboard - Computer Slitting - Computer Die Cutting - Die Cutting

The preprinted production method has the following salient features compared to the traditional color carton production method:

1, high production efficiency

Because the preprinted printing method uses a web gravure printing machine, the printing speed can reach 150 meters per minute, and the imported printing machine can reach 300 meters per minute. After printing, a corrugated paperboard is made in a corrugated paper production line, which is much faster than a conventional veneer machine. The YAD5160P standard type preprinting press manufactured by Huayang Company uses a 670×460 color box as an example. It can produce 120,000 cartons per shift (8 hours).

2. The quality of ink and color printing of color cartons is high

When using paper with high surface smoothness, gravure printing can achieve high printing quality. Gravure printing can be carried out both on-site and in horizontal printing, with overprint accuracy of up to 0.2 mm. The gravure printing can also finish printing and varnishing once; the gravure printing network can reach 200 lines; the gravure printing ink is larger than its printing mode, up to 4.5g/m2, the printing ink More saturated; the gravure printing is fully dried after each color printing, and the prints are more vivid and more solid. Therefore, under the premise of using a paper with a higher surface smoothness, gravure printing can obtain high ink printing quality. Most cigarette packages, for example, are gravure products. At present, domestically produced water-based gravure paper inks are relatively mature and can withstand the high temperature and hot plate friction requirements of 180-hectares on corrugated paper production lines.

3, can carry out large-format multi-color printing

The traditional maximum color offset printing format is generally 1.2×0.9 meters, and usually only 4 colors are printed. The gravure printing machine can reach 1.7 × 1.7 meters of printing format in the country at present, can reach 5-12 colors very conveniently. Abroad gravure printing machine width up to 3.4 meters. The gravure printing machine can also print special inks such as gold ink and silver ink.

4, more suitable for large-scale long-lived

As the preprinted plates are made of steel chrome-plated electrogravure, the plate making costs are higher. Under normal circumstances, the plate-making cost is: high-level double-version 0.7 yuan / cm2, ordinary-level version and the line field version is 0.4 yuan / cm2. Gravure version of the number of prints is 300-400 million India. The plate-making fee for offset printing is RMB 100/pair, but its resistance to printing and the number is 1-20000. Therefore, the cost of gravure printing for long runs is lower than offset printing.

5, the production of corrugated cartons have higher strength

Because preprinted corrugated cartons are produced on the production line, there is a certain amount of heat-forming time when making corrugated cardboard, so the strength of the corrugated cartons obtained by the conventional method using a veneer machine is higher, and the veneer machine can avoid the production of cartons. The appearance of uneven glue, paper fines, buckling, box warping and other phenomena.

Second, pre-print production equipment and technology

1. The pre-printed main production equipment is a large-scale group-type web gravure printing machine

The aircraft has the following features:

(1) High printing speed and high overlay accuracy

For example, the YAD series of paper pre-print gravure printing machines produced by Huayang Company can print at a speed of up to 150 meters per minute, and overprint accuracy of less than 0.2 mm.

(2) Large print format

The machine's printing format can be from 1000 × 600 to 1700 × 1700 mm.

(3) Printing and painting are completed once

The machine can achieve 4-12 color ink printing, and once with the varnish. In order to reduce the cost of plate making, the oiling unit is driven by a separate motor and it is not necessary to replace the oiled plate roller when changing the printing plate roller.

(4) Use environmentally friendly ink printing

The machine is equipped with a double oven hot air drying system, which can fully dry and solidify the ink and ink to ensure that the printing surface does not fade or “pull” when it enters the corrugated paper production line and the hot plate. The automatic ink circulation system and the ink stick make the color of the batch print uniform and colorless.

(5) High-speed automatic non-stop refueling

The machine can realize high-speed non-stop automatic exchange of material rolls, greatly improving the yield, and saving donation working time.

(6) Automation Control

The machine adopts 9 motor vector frequency conversion full-closed loop tension control system, computer automatic color registration system, computer static image observation system, computer ink automatic circulation viscosity control system, computer automatic refueling control system, human-machine dialogue system and steam heating temperature automatic Control System. At the same time, the use of pneumatic shaftless plate, pneumatic scraper, pneumatic imprint, pneumatic shaftless material, two-cycle hot air drying, paper preheating, water cooling and other structures, so that the operation of the machine is very simple.

2. Pre-printing production auxiliary equipment is computer-controlled cross-cutting and slitting of corrugated paper production line

The pre-printed face paper is placed on the corrugated line of the liner paper and is sizing, veneering, flattening, drying, and cutting to make a colored corrugated cardboard. After the pre-printed face paper is heated and fixed on the tile line, the printed surface will rub against the hot plate on the tile line for a long time and the printed pattern will be drawn. Therefore, some simple processing must be performed on the hot plate. Huayang has achieved certain mature experience in this area and can assist customers in solving this problem.

In the previous corrugated paper production line, most computer cross-cuts were only cut to length, and the pre-printed pattern was printed first. Therefore, the cross-cutting control system must be installed on the cross cutter. Its main control mechanism is to recognize the cross-cut mark on the corrugated cardboard printing pattern by the photoelectric eye, and transmit the cross-cut mark to the photoelectric eye to the control computer. Then, the control computer controls the cutting time of the cross cutter so as to accurately cut the corrugated cardboard at the boundary of the pattern. At present, cross-cutting machine manufacturers at home and abroad can easily add this function.

3 Seater Fabric Sofa

3 seater Fabric Sofa is a recliner sofa with 3 seats. It has two recliners at both sides. It's cover materials is fabric which is safe, environmentally friendly, comfortable cloth, made of wood frame and fine sponge, which brings people warm, comfortable and environmentally friendly family living environment.

You`ll feel very comfortable when you sit or recline on it for lunch break or after one day's work, and breathable performance of fabric sofa is good. The soft cloth is especially comfortable to touch, making people relax and feel the leisure.

3 seater fabric sofa is suitable for small space, it makes more sofa designs and colors than leather sofa, and it`s warm in winter, and breathable in summer, new fabric sofa won't give out a pungent leather smell at the same time.

3 seater fabric sofa gives a person a sense of leisure, and strong comfort, let a person have the feeling of relax when get home.

Grey Fabric Recliner Sofa,3 Seats Fabric Sofa,Fabric Recliner Sofas,I Shaped Fabric Sofa

Kaifeng Lanwei Smart Home Co., Ltd , https://www.sofawickles.com