Statistics from customs show that China’s printing machinery exports last year was 32 million U.S. dollars, while the import of printing machinery and equipment was 901.2 million U.S. dollars, and the export of printing machinery was 39.64 million U.S. dollars, up 16.6% from 2000, and imports were 1.37 billion U.S. dollars. Last year, it grew by 52%. The export volume of the printing machine industry is far lower than that of other electromechanical industries, and the import volume is ranked among the top ones, which is one of the 12 industrial products with a large increase in imports. This is a set of figures presented to attendees at the Export Work Conference organized by the China Printing and Equipment Industry Association. This article will introduce you to the wholesale of carton printing machinery.
At present, the evaluation of energy saving and environmental protection of printing machinery mainly adopts two methods: one is calculated according to the type of energy consumption of printing machinery, and the other is calculated according to the process of energy consumption of printing machinery. The indicators used for calculation are usually the energy saving of the printing machine, the energy saving rate of the printing machine, the energy consumed comprehensively, the equivalent value of the energy consumption of the printing machine, and the like.
However, many experts disagree with this method. They believe that these methods are too thin for the energy consumed by printing machinery. They include not only the process of consuming energy, but also the consumption of various resources, complicating the problem, and operating. The performance is poor, and the measurement of various consumptions does not have a complete testing method, and it is difficult to obtain data.
Because of the complexity of the printing machinery structure, due to many factors that determine the energy consumption of printing machinery, such as the structure of the machine, the processing and assembly accuracy of the parts, the control method, etc., we can not accurately analyze these factors.
In summary, the unit energy consumption, comprehensive energy consumption, energy conservation evaluation value, and user increase investment recovery period can be selected as energy-saving evaluation indicators for printing machinery products.
In order to grasp the types of energy consumed by printing machinery, printing machinery has released some methods for environmental protection and energy saving evaluation of printing machinery. It is understood that only flexographic printing machines, gravure printing machines and composite printing machines use gas for heating. Other models They all use electricity for production. In order to simplify the complicated problems, the energy consumption of various types of printing machinery is divided into two types of energy consumption: single energy consumption and two or more energy consumption.
We know that paper is very sensitive to changes in temperature and humidity of the environment. If the printing environment temperature and humidity are not normal, it will easily cause the paper to expand and contract. If the water content of the paper is too low, the paper is easily curled around, and wrinkles are likely to occur during printing. The water content of the paper is too low, and it is easy to generate static electricity, making it difficult to achieve normal printing. If the water content of the paper is too high, it tends to make the paper too soft and embossed. Therefore, we should pay attention to strengthening the scientific management of paper.
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