Cardboard Problem Solving--Corrugated Improvement

II Reconstructing Low Efficiency Tile Line Equipment Efficient and High-quality Cardboard Production

With the rapid growth of China's accession to the WTO and the domestic economy, China's corrugated Paper Box packaging industry has also entered rapid expansion and development. Accompanying this era is the increasingly fierce market competition in the industry. When paper box manufacturers are unable to control the market price, paper mills only have to initiate self-study, increase new equipment (high-speed production lines equipped), improve management level (increased production management system, improve technology, improve product quality and reduce the efficiency of L Production and operating costs to respond to fierce market competition.

After decades of development, China's corrugated carton packaging industry has produced more than 3,000 sets of total production lines. Compared with its counterparts in other countries in the world, it is truly spectacular. Since most of these equipments were put into use in different historical periods and market conditions, the machinery factories and carton manufacturers at that time were far from meeting today's market competition for the production, procurement, and procurement of these equipment; The demand, then, “how to upgrade the efficiency of the inefficient corrugated cardboard line equipment to achieve high efficiency” was put in front of the operators of the carton manufacturers and became an urgent task for the operators to solve urgently. problem.

Compared with the purchase of new, highly-configured corrugated cardboard lines, the technological transformation and upgrading of corrugated board line equipment has higher economical efficiency and operability, and cartons manufacturers can according to their actual conditions (market operations, scale, Funding, technology, etc.) With minimal capital investment, the cardboard line has been improved in configuration and function. The technological upgrading of corrugated board line equipment is roughly divided into two types: partial equipment replacement and transformation on the original organic type.

In recent years, based on feedback from packaging machinery manufacturers, carton manufacturers have seen rapid growth in the number of single-machine purchases in addition to the entire line of cardboard. These stand-alone machines are used to produce single corrugated paper, and most of them are used to replace old-fashioned machines. This kind of transformation is relatively quick and effective, and it is also the most costly one in the reconstruction project. Therefore, more manufacturers are adopting the transformation on the original organic type, that is, under the premise of ensuring quality and not replacing each machine. Enhance functions and configurations to maximize the efficiency of the entire line (90% of the single-sided machine speed), so as to increase manufacturers' production efficiency and increase market competitiveness. The original country of the carton manufacturer's corrugated cardboard line efficiency is not as high as the following: Mechanical reasons:

1 model selection one motor power ratio, tile size, etc. Gearbox speed 2 pit machine
3 cross cutter (machine knife to computer knife)
4 Preheat cylinder size and lack of operability Accuracy of 5 watt rolls/pressure rolls 8 Wear/accuracy of the pit wheel, paste wheel, pressure wheel 7 Steam pressure (temperature) of the production line too low 8 Bake less

â– Process and Management

glue

The water is too big (ie the proportion of water powder is too large)
Gelatinization temperature is too high. Excessive sizing. Other (viscosity)

operating

Excessive moisture in raw paper Misuse of preheated cylinders / improper use of preheated cylinders Lack of proper use of steam traps Lack of rational platooning, lack of tacit understanding between machines and machines No automatic splicing machine conditions, lack of skilled manual splicing technology

maintain

Keep the machine lubricated Keep the machine table and air ducts clean. Replace worn out fittings in time.

â– Solution

In view of the above causes, the following are some solutions

Program:

Adjust the appropriate glue following some solutions

After the author's observation of a number of manufacturers for a long time, there are still many manufacturers of glue problems do not get the attention they deserve.

Control raw paper and production process moisture

The moisture of the paperboard mainly comes from the paper itself and the adhesive glue; in addition to the strict control of the supplier's control of the moisture content of the raw paper before the purchase, the main thing is to depend on the water-repelling function of the preheating cylinder during the production process. Can be installed through the touch bar / hot plate; replace the precision paste wheel; timely replacement of worn out of the pit wheel, paste wheel, pressure wheel and other measures to be resolved.

In summary, the author thinks that the technical upgrading of the cardboard line has not only been limited to simple replacement or addition of some accessories and improved configuration, but it should be a technical and conceptual update. It is a variety of processes (adhesives The harmonious combination of operation, management, etc. is a systematic project.

(Author: Wang Xiaohua Guangzhou Xiaohua Mechanical and Electrical Equipment Co., Ltd.)

Corrugated Carton, July 2005 issue