In recent years, the author has transferred to East China packaging companies. He has learned that the average running speed of most corrugated cardboard lines of most companies is low, and most of them are between 30 and 40 M/Min. The economic speed of equipment is far away. To this end, the company is seriously troubled by the fact that it is not the same as the equipment manufacturer's wrangling or self-improvement. As a result, the pressed gourd floats, and it is very difficult to achieve an unrecognisable line of work. What are the cruxes that affect the operating speed of corrugated cardboard lines?
The author discusses what he knows and discusses with his colleagues:
First, the equipment is inherently inadequate. Due to lack of understanding of its performance structure when purchasing equipment, or focusing on low-priced equipment, it has purchased equipment that is not mature and defective. The main performance is:
1. The thermal efficiency of the corrugator is low or it can not meet the production temperature of 180°C (heating matching defects, high heat loss, ie the design of the external suction vacuum adsorption device is unreasonable, take away certain heat, and the heat supply is insufficient.)
2. Corrugated roller: Φ280MM or less. Although some equipment specifications indicate an economic speed of 60-80 M/Min, actual production cannot be achieved at all. Some merchants corrugated roller Φ320MM below also indicate that the economic speed of high-speed machines can reach 100 ~ 180M/Min, the essence of which is deceptive propaganda.
3. The preheater cylinder bore is less than 600mm, and there is no preheating angle device for adjusting paper, and it is impossible to fully preheat the base paper.
4. The dryer hot plate is too short (less than 9M), the paperboard after the double-sided machine is not fully dried, the adhesive glue is poor, and the speed is slightly faster, which results in a large amount of cardboard degumming.
5. The cooling part is short and the ballast roller is sparse (the distance is more than 200mm), which is unfavorable for the distribution, shaping and full adhesion of water vapor on the cardboard.
Second, the quality of the base paper does not meet the production requirements One-sided pursuit of low-cost, but for the purchase of cheap pull, moisture, no toughness, more than dust does not meet the quality requirements of the base paper. These basic papers, which cannot even be mentioned in the minimum national standards, can be applied to production. What kind of consequences can one expect to know? How dare you talk about speeding up?
Third, the poor quality of glue and the inappropriate amount of glue failed to flexibly formulate the glue according to the water permeability of the paper, the ambient temperature and humidity, or use a glue solution that is degraded and thin and has a lot of foam, or it may worry about the poor adhesion of the paperboard and intentionally increase the coating. The amount of glue, but also ignored the speed of single-sided corrugated board full preheating and dryer temperature and other factors, resulting in single-sided cardboard corrugated water too soft, in order to ensure that the paperboard adhesive and stiffness dryer had to Slow down.
Fourth, technical personnel with weak technical strength and lack of team awareness are seriously lacking. Operators in key processes are not skilled enough in the ability to control the equipment, and the necessary training and learning of employees has not attracted the attention of the company. Even if the technical staff of each key process is not bad, but lack of good teamwork and mutual cooperation spirit will also affect the speed of the cardboard line.
To solve the above problems, the key must be based on the company's own conditions and adjust to the conditions of the factory and adapt to others. If the company is unable to upgrade the equipment in the near future, consider the equipment transformation. But first of all, it is necessary to determine the location of equipment defects in order to prescribe the right medicine, and avoid blindness. In the selection of corrugated materials as soon as possible out of the "have lost sesame seeds lost watermelon" misunderstanding. According to the packing expert's opinion, the quality standard of the base paper used in the corrugated cardboard line running at a speed of 60 M/Min or more is not lower than that of the B grade. As for the pros and cons of glue, it is particularly important for the running speed of the paperboard line. I once stated in detail in the article “The quality of glue is the key to the quality of the carton” published in “China Packaging News”. It is no longer to say that the viscosity is only from the glue. , Starch and water ratio to talk about personal views: high-speed running cardboard line (100M/Min above) adhesive viscosity 40 ~ 45S (coating 4 standard measurement), starch and water ratio of 1:6 ~ 1:7 is appropriate. In order to achieve the desired speed, we must also flexibly prepare the glue solution based on comprehensive analysis of paper environment temperature and humidity.
Finally, it is worth paying attention to the "people-oriented" concept advocated by many companies. The technical level of employees, the quality, and even the spirit of collaborative team spirit, these words often hang in the lips of business leaders. The real operation is not simple. How to cultivate talents and reserve talents? Retaining talent and maximizing the release of energy depends on the enterprise's employment mechanism and the charm of the company, as well as the good development space for talent. (Shan Xiaojing)