How to effectively improve the quality of printed iron products and reduce costs

At the meeting of the Expert Committee in November last year, it was proposed that the printing industry in China is facing three major issues: equipment transformation, environmental protection measures, and selection of raw materials.

In the past year, a rough estimate: about 10 imported iron-coating equipments, about 30 imported iron-coated equipments for second-hand goods, and Shanghai Ruiyuan Printing Equipment Co., which has emerged as a new army, produced about 30 iron-coating equipments, and about 80 new-build drying houses. Article (large size), Shanghai Longtong environmental protection equipment 10 units, the system screw cap and can making factory with iron specifications ultra-thin and large, so that the supply of 0.16-0.18m/m tinplate, and so on.

There are equipment adjustments between Yintiechang and the development of Yintie new products, which all show that in order to adapt to market competition, all companies are looking for directions, but all are a goal: to improve the quality of Yintie products and reduce costs is the ultimate way out. Today, on this topic, the classification is introduced as follows to explain the development trend of the printing iron industry.

First, mechanical humanization:

This title is to emphasize that there is a saying in the printing industry: "5 years apprentice, 10 years master." In other words, the formation of a printed iron product mainly comes from technical personnel's practical experience, and cannot be calculated by theory. In fact, the shortage of master printers also reflects this problem. Because of the diversification of the printed iron products, the complexity of overprinting and the sharpness of the pattern dots all require the operators to carefully work out the aspects of plate making, ink adjustment, seeing the sample, adjusting the ink-and-ink system, and printing on the platen roller, etc., to produce satisfactory products. Most of the “old mages”, known as Master Yintie, are already over the age of 50, and it is already difficult to perform specific operations on the production line. However, on the other hand, the iron printing plants of large domestic companies are not all middle-aged and old-aged printed iron masters, but they can also produce high-quality printed iron products. The reason for this is that in addition to the excellent corporate management system, the advanced properties of the iron coating equipment Played a key role. In recent years, the world has also introduced the use of computers instead of human brain printing equipment is ideal for young people.

1. Inking machine:

(1) Alcohol dampening system instead of water roller system

Features: Clear dot pattern, reduce human error, timely achieve the best state of ink and water balance, and improve production efficiency.

(2) Automatic ink tank cleaning device instead of manual cleaning

Features: Avoid ink clogging, improve production efficiency, which is remarkable in two-piece can printing

(3) Automatic ink adjustment system instead of manual adjustment

Features: Automatically adjust the contact length of each sub-ink roller and ink roller, and save and renew the data of each ink product's ink volume, thus ensuring the repeat quality of the printing iron and greatly reducing the proofing iron sheet, increasing productivity. .

2, coating machine: digital control, automatic adjustment of the gap pressure of the coating roller and pressure roller, in order to ensure the leveling of the coating iron and thickness control.

Second, the process of environmental protection:

Any enterprise's development must pass the demonstration of ISO14000. In the printing industry, as long as the use of solvent-based coatings (primer, varnish, white paint, internal paint, 214 golden paint), there are environmental pollution problems. In the 1980s, catalytic combustion was the main method. In the 1990s, incineration was the main method. However, in China, environmental protection equipment was developed. However, from the point of high positioning, that is, to achieve the dual effect of environmental protection and energy saving to reduce operating costs, it is estimated that this The project will make breakthroughs in recent years, instead of importing environmental protection stoves, and the prices will only be about one-fifth of that of imports. At present, about 12 environmentally-friendly furnaces have been imported, and 30 domestically-made environmentally-friendly furnaces have reached a very promising market.

Third, the selection of raw materials:

1. Tinplate: Regardless of the tinplate thickness and the amount of tin plated on the tinplate, the thinning thickness is used to reduce the cost. In addition, some printing iron plants have added coil cutting machines, cutting according to the product size, and improving the utilization rate is also one of effective measures. In addition, it is proposed that with the use of 0.16-0.18m/m tinplate for secondary cold rolling, our can making equipment, especially the sealing equipment, must be modified to adapt to this material change. In addition, the fine-grained tinplate (STONE-2) can improve the adhesion characteristics of the coating film, and is also being taken seriously by the printing-iron can maker.

2. Coating ink: The printed iron product is actually a matching combination of printing ink and coating (bottom oil, varnish, white paint, etc.). It can be imagined that if there is no coating, there will be no printed iron product with ink. In fact, China's development of tinned cans started from the canning industry. The development of coatings was first developed by internal coatings (in line with food hygiene, corrosion resistance, and canning performance) and then extended to external coatings. The ink has developed from general performance to special inks such as explosive inks, spinning wood, spinning paper and anti-counterfeiting. They are all highly professional chemical materials and need to be discussed separately. However, it is a promising product for Orijin to specialize in canned tomato sauce products. Because Xinjiang's ketchup products are of the highest quality, they are welcomed by the Western world and have a good market prospect.

The specifics of the proposal:

First, canned food coatings requirements: food hygiene → epidemic prevention inspection permit;

Corrosion resistance → anti-sulfur, anti-acid, anti-odor;

Can (cover) performance → adhesion.

Second, food cans paint adhesion and corrosion resistance is inversely proportional, in addition, the coating thickness and adhesion are also inversely related to the impact of adhesion factors:

1. Tinplate: oil layer, passivation film, surface roughness, and TFS iron (chrome plated iron)

2. Coating process: Under the premise of guaranteeing the leveling of the coating film, if the quality is unstable, the use of lower baking temperature of 5-10°C and prolonged baking time of 5 minutes can be improved.

Third, improve the use of printing machine: monochrome machine is better than two-color machine, three-color machine utilization is low. If a workshop is the most reasonable with three lines (monochrome, glazing, two-color, coating machine), it is guaranteed for high-grade monochrome printing.

Fourth, to fill domestic blank or promising projects:

1. Mechanical humanization: alcohol dampening (Korea), automatic ink volume adjustment (Japan), coating machine computer control (Shanghai Ruiyuan);

2, 70g tomato sauce jar: two pieces of the most suitable tank, to deformation printing;

3、Double-receiver box for Italy's iron coating line (Italy) - with exhibition information

4. Wet Film Thickness Gauge (Sencon) for Coating Line - Attached to the Exhibition Information

Fifth, reduce costs:

1. Calculation of energy consumption and energy saving measures for environmental protection furnaces in Beijing and Shandong

2. For some can-making products, the possibility of using epoxy ester coating

3, the application of laminating iron.