Shoemaking Industry Will Move Towards Energy Saving In Colleges And Universities

Asynchronous servo energy saving is favored by the market.

Energy saving and safe injection molding machine products play an important and positive role in promoting the pformation and upgrading of China's plastics machinery industry and building a new industrial structure.

In recent years, China's plastics machinery industry has grasped the opportunities for energy saving and environmental protection products to become a hot spot in the market. A large number of high-efficiency and energy-saving plastic products have been launched, covering not only the various fields of the plastic products processing industry, but also meeting the different demands of various manufacturers on the production of bulk plastic products and the production of precision products, and adapting to the higher requirements of the various sectors of the national economy such as aerospace, defense, petrochemical, marine, electronics, optical and electrical communications, building materials, packaging, electrical appliances, automobiles and pportation, agriculture and light industries, and so on, and are favored by the market.

The energy saving of the plastic machine can be divided into two parts: one is the power part, the other is the heating part.

Throughout the energy saving pformation of all kinds of injection molding machines in the market, the servo energy saving pformation is characterized by its high stability and high energy saving rate. Now it is the most trustworthy and feasible way to save energy, and asynchronous servo energy saving is not only characterized by high power saving rate and high stability, but also low cost, low after-sales service and so on.

Conservative

It also has certain potential in energy saving. The reason is that previous designs often focus on single machine production capacity.

In the design of energy saving plastic machinery, production speed is not the most important index. The most important index is the energy consumption of processing unit weight products.

Therefore, it is necessary to optimize the mechanical structure, control mode and operation conditions of the equipment based on the minimum energy consumption.

The asynchronous servo energy saving series injection molding machine is equipped with a high-performance servo variable speed power control system. The injection molding machine produces different frequency outputs for different pressure and flow rate, and carries out precise closed loop control for the flow, so as to realize the high speed response of the asynchronous motor to the energy demand of the injection molding machine, and the best matching and automatic adjustment.

Moreover, the energy saving rate after the servo pformation is determined according to the detailed parameters of the tonnage of the injection molding machine, the power of the motor and the time of cooling and keeping pressure. Generally speaking, the larger the tonnage is, the longer the cooling and holding time is, the higher the energy saving rate is, the more electricity saved and the more electricity saved.

The conservative injection molding machine uses quantitative pump to supply oil, and the injection process has different requirements for speed and pressure. The proportional valve of the injection molding machine uses overflow regulation to return excess oil through the oil return pipeline to the oil tank. During the whole process, the speed of the motor is constant, so the oil supply is fixed. And because the execution action is intermittent, it is not likely to be full load. Therefore, the quantitative oil supply has a lot of waste space. According to the actual measurement, there is at least about 35-50%.

Gap between plastic injection machines and foreign countries

China

Enterprises are mainly distributed in the southeastern coastal area and the Pearl River Delta region. Among them, Ningbo has the strongest momentum of development. Now it has become the largest production base for injection molding machines in China. The annual production accounts for more than 1/2 of the total annual output of the injection molding machine in China. The 1/3 injection molding machine industry, which is the world's injection molding machine, develops rapidly and produces more varieties.

The general technology and equipment for processing and plastic products processing and forming are also in the forefront of the world. However, compared with industrial developed countries such as Germany, Japan and Italy, there are still some differences in China's injection molding machines, mainly in terms of varieties, high energy consumption, low control level, and unstable performance.

At present, China's injection molding machine products are mainly concentrated in the general small and medium-sized equipment, with low technical content. In the 80-90 decade of twentieth Century, the supply of low-grade products exceeded demand, mechanical manufacturing capacity was surplus, and the efficiency of enterprises decreased.

Some varieties, especially the super fine and high-end products, are still blank and still need to be imported.

According to statistics in 2001, China imported foreign plastic injection molding machines for foreign exchange of 1 billion 120 million US dollars, while imported injection molding machines made only 130 million US dollars in foreign exchange, and imports far exceeded exports.

After China's accession to the world economic and Trade Organization (WTO), foreign machinery manufacturing industry has accelerated its shift to China. Some world-renowned injection molding enterprises, such as Deutschmark, Krupp, Baden Phil and Sumitomo heavy industries, have been stationed in China, and some have further set up technology centers.

The entry of foreign injection molding machinery manufacturers has brought vitality to China's injection molding machine industry, and also made Chinese injection molding machine manufacturers full of opportunities and challenges.

In the coming period, the state must implement the overall arrangement of the comprehensive work plan for energy conservation and emission reduction in 12th Five-Year, and push forward the work of industrial energy conservation and emission reduction.

Plastic machinery enterprises should actively carry out specialized production, change the disadvantages of being large and full, lack of high, fine and sharp points, improve the quality level of key parts, take the high efficiency and energy conservation as the development objective of the industry, and regard the invention of world famous brand products as the goal of struggle.