The development of the hottest carton and its mach

2022-10-13
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The development of carton and its machinery industry

in the last issue, we talked about the development history of carton and its machinery industry - running behind others in a muddle, not developing in an orderly, coordinated, comprehensive and balanced way, and there are omissions and regrets that "only a little is less than the rest"; Development status - make a comparative analysis of the indicators of the machinery and equipment situation of carton industry between countries in the world and China. In this issue, we continue the introduction and Trend Outlook of jujube technological innovation that was not completed in the previous issue

product evaluation:

■ functionalization. The functional packaging and finishing processing of cartons in European and American countries are used to show the beautified content packaging, which is more common and strengthened. In addition to exquisite printing, the application of auxiliary materials, coating and finishing are another aspect. For example, refined paraffin and emulsified paraffin are widely used, which significantly enhances the waterproof functional packaging and the preservation of seafood; Color coated cartons have changed the plain color tone of traditional cartons, which are all earthy yellow, and greatly improved the effect of beautifying and promoting commodities; Surface treatment technologies such as carton surface coating can also play the functions of atmosphere regulation, fresh preservation and static elimination. They are used for packaging flavor food, and are also of great benefit to some fruits and vegetables and microelectronic products

■ carton structure: in developed countries, three-layer cartons account for the vast majority, accounting for 89.4~88.7%, double tile five layer paperboard accounts for 9.1~9.5%, and three tile seven layer paperboard accounts for only 0.5~0.6%. In recent years, the application of heavy packaging and all paper pallets has increased, and the proportion of the latter has increased, but the proportion is still very small. This is another embodiment of the green packaging characteristics of lightweight packaging and resource and energy conservation

■ corrugated structure and lightweight. In the United States, the carton weight is as small as 500~510g/㎡; The average unit weight of cartons in France and other five European countries decreased from (550~570) g/㎡ in 2002 to (510~520) g/㎡ in 2004. There are many kinds of corrugated structures, including a, B, C, D, e, F, G and N corrugated. Among them, e corrugation is hereinafter referred to as micro corrugation. F. The height of G and n-shaped ridge is (0.75~0.81), (0.508~0.58) and 0.46mm respectively; In recent years, O-shaped corrugation has appeared again, and the corrugation height is 0.3mm. In addition, there was a large corrugated K-type in early years, with a height of 12.7~19.6mm, and double arch (two-layer core paper) molding, which is used for heavy packaging and shock absorption and impact proof packaging occasions. In this way, the functional packaging function of corrugated boxes is more comprehensive and strengthened

we are only in the state of starting to use or want to use the "micro watt" but can't use it, mainly because there are still problems in technology, equipment and price

introduction to technological innovation

in the 1990s, the modern carton industry entered a stage where computers and high-tech were more widely used. Production link control, process control, automatic control of the whole production line and the production and operation of the whole plant have become commonplace. Here is only a little description of the technological innovation in this part of the tile line

the new structure and technological innovation of each single host, connecting link and auxiliary equipment on the corrugated board production line, as well as the high-tech application of key components, such as corrugated rollers, cross cutting machine knife shafts and knife bodies, have been described at previous industry conferences. Due to space and time constraints, they will not be repeated. This paper introduces the technological innovation of two key hosts, one-sided machine and two-sided machine, which directly affect the speed and performance of tile line

■ in 1995, on the occasion of the centenary of the founding of Langston company in the United States, the world's first multi corrugated single-sided machine was born. It is a positive pressure type quick change corrugated roller structure. Groups of corrugated rollers are placed on a movable car to realize the replacement of corrugated types by exiting and moving in. It should be said that this is the first initiative. Since then, there have been 90acs multi corrugating single-sided machine (air cushion positive pressure, trolley mobile type), box type RAM positive pressure multi corrugating single-sided machine, and the replaceable corrugating types include super large upper corrugating roller and super small lower corrugating roller. The forming structure of extra large and extra small corrugating rollers makes the path of core paper passing through the zigzag channel between the two corrugating rollers shorter, the contact between the paper and the top of the corrugating roller is reduced, and the clamping pressure of forming is also reduced. The wrapping angle and length of the formed corrugating paper on the extra large corrugating roller are 4-5 times that of the traditional single-sided machine, so it is well bonded, and the rubber used is very small, which promotes the reliability of ultra-high speed operation; Due to the above characteristics, the contact wear of small corrugating rollers is reduced to 1/3 of that of traditional models; The wear of the upper corrugation due to its large diameter is also very small, which is called zero wear; The small corrugating roller is also durable and wear-resistant due to special surface treatment; Once the roller needs to be replaced, just replace the small corrugated roller

■ turnover type quick change corrugated roller single-sided machine, commonly known as calendar type single-sided machine, is faster and simpler to change corrugated roller than translation type, which is like flipping calendar. Its principle and advantages can be explained in the figure and will not be repeated. There are many mysteries in their pre-regulation of the surface and lining paper, the setting and positioning of the gluing mechanism and the giving way when changing the roll, and whether the positive pressure box type closure or the sealing scraper type closure makes the positive pressure not leak

■ short press high thermal efficiency double-sided machine without conveyor belt at the top and bottom. Its hot section is 7950mm long, and the cooling transmission section is 2660mm. The paperboard is dragged by the eyelet vacuum conveyor belt. The pressurization structure is three groups of pressing plates, and each of the four pressing plates is a group, which can be adjusted up and down. In the Z drop hammer impact tester experimental system, adjust the heat, and each group pressurizes the pressing plate with hot air, so that the heat conduction and drying are extremely rapid

■ the double-sided machine uses superheated steam to spray into the hot plate with densely arranged holes like a gun shot, and applies heat transfer and pressure to the cardboard and hot plate in the way of penetrating heating, so as to achieve the effect of rapid drying

■ controllable hot double-sided machine, the hot section is divided into 3 or more sections, and the hot plate is composed of a very precise square tube with a wall thickness of 4mm, with rapid heat transfer. The pressurization is completed by the hot air pressurization system. Each section is equipped with an infrared thermal sensor to measure the temperature, cooperate with the microcomputer to control the fully automatic adjustable steam valve, adjust the steam inlet and its flow, and adjust the temperature within a few seconds to realize the closed-loop temperature control of the double-sided machine. The thermal efficiency is very high. It is a very advanced and original system, which is unique in the carton industry

all this shows that the rapid progress of today's key main engines in high and new technology is just to adapt to the changing and demanding market needs, win high speed and high efficiency by technology, take off the hat of "small profit" from the face, and get out of the dilemma of living a hard life. In other words, to obtain these technologies and equipment, we need to spend a lot of money, spend many years of hard research and development, use good base paper, cooperate with the relevant departments directly under the provincial government and cities to schedule, evaluate and correct the best environment and auxiliary conditions for the implementation of plans, project implementation, policy implementation, work promotion, etc., which we can't do at present

tend to be used to adjust the spatial potential of experiments.

talking about trends and prospects is a difficult topic, which should be formed by logic, reasoning, induction and summary on the basis of mastering a large amount of information. In fact, the previous few topics are related to the development trend. From history, current situation to development, we can see the details of the trend

◆ carton products should develop in the direction of giving full play to the packaging function

as mentioned earlier, this involves quickly adapting to the changing and demanding requirements of the market; Gradually lighten the carton structure; There are many problems to be solved in the development and use of suitable and economical corrugated types, especially the use of micro tiles. There is also the cooperation between exquisite printing and good printing; Surface finishing, such as melting wax, spraying wax, color coating and the application of functional coatings

there are also the inner partition of the carton and the positioning lock fasteners, which are molded by cutting corrugated cardboard with a precision die-cutting machine. It is light and environmental friendly, and can be produced quickly

carton production mode should focus on practical results and reasonable division of labor. "Centralized board making and decentralized box making" has been shouted for several years, but there are still regional limitations and uncoordinated obstruction

the development and progress of carton factory cannot be separated from equipment renewal or transformation. It should focus on transformation, local key host update or transformation to improve performance. Because the technical level of equipment is low, it is not the fundamental way to buy new production lines. While optimizing the plate making equipment, developed countries pay close attention to the supporting and comprehensive integration of post processing equipment, which in turn improves the efficiency of tile line. The domestic medium speed line can be speeded up with a little transformation

◆ we should deal with the impact and challenges brought by global economic integration

the development prospect of carton machinery factory can be summed up in a word: looking at the current situation of European and American countries, it is moving forward. The technical connotation of our equipment should be constantly enriched and improved, starting from each key structural link of each host, and from small changes to large changes and updates of each equipment, we should continue to improve. Much has been said before. Those advanced things should be done step by step

source: Global corrugated box

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