As a world leader in the manufacture of plastics machinery, China's plastics machinery production and sales volume has exceeded Italy, which is ranked second, and is transforming into a manufacturing powerhouse. The outbreak of the global financial crisis in the second half of this year and the ups and downs of raw material prices have cast a shadow over the ready-to-get plastic machinery industry. At the 5th Conference on Advanced Forming Technology and Materials Processing in 2008, the Beijing University of Chemical Technology Professor Wang Xingtian pointed out that the development of plastics machinery technology should focus on energy-saving precision and high efficiency.
In recent years, the output of plastic machinery in China has grown rapidly, and the series of presses have been completed, forming prominent industrial bases such as Ningbo, Zhoushan, Guangzhou, and Dalian. A group of companies such as Haitian Group that have a certain influence in the international community have also emerged in succession. . Especially after entering the 21st century, China's plastic machinery manufacturing technology has also greatly improved. Many domestic plastic machinery enterprises have adopted the internationally advanced software UGII for development and optimization. The products are equipped with electromechanical components of world-famous brands, thus effectively ensuring the quality of plastic machinery products. In 2007, plastics machinery was also listed for the first time in China's famous brand products.
Statistics from the General Administration of Customs of China show that in 2007, China exported more than 100,000 plastics machinery (excluding ancillary equipment) with a total value of 1.45 billion U.S. dollars and imports of nearly 26,000 units, with a value of 2.56 billion U.S. dollars, although the number of imported machines is only 1/1 of the number of exported machines. 4. However, the amount of imports was 1.1 billion U.S. dollars more than the amount of exports, and the gap between the added value of products is very obvious. Professor Wang Xingtian pointed out that in the current situation, increasing the value of processing technology to increase the added value of Chinese plastics machinery is the only way for the development of China's plastics machinery industry.
Professor Wang Xingtian believes that a country's level and strength of plastic machinery can not only look at production, manufacturing capacity and the production of accessories, only sales and sales are not really strong, the most important indicator is the precision of plastic machinery products Or the ability to repeat accuracy. The ability of plastic machinery to machine the precision of products is a comprehensive indicator for the assessment of machinery and equipment. This indicator is related to many factors, and only if equipment precision is improved can the equipment be operated efficiently. Taking an extruder as an example, if the non-uniformity of the thickness of the formed product is 8% to 10%, the material waste can reach 8%. If the accuracy of product quality is increased from 8% to 10% to 1% to 3%, according to the calculation of China's plastic product output of 33 million tons in 2007, the amount of resin saved per year will be several million tons.
The precision of plastics machinery is also the basis for high-speed operation. Only when precision is achieved, the processing speed of plastics machinery can be increased to save energy. Taking an extruder as an example, the speed of foreign advanced single-screw extruders with a diameter of 30 mm is as high as 3,000 rpm and the output is 300 kg/hr, while the speed of the current domestic extruder of the same type is only 300 rev/min. 30 kg/hour, the gap is huge. Therefore, the dimensional accuracy and repeatability of plastic products can be used as a quality evaluation standard for presses, and also a sign of the strength of a company and a country's plastic machinery manufacturing capabilities. To this end, Wang Xingtian suggested that the accuracy standards and testing standards for plastics machinery should be introduced as soon as possible, which is of great significance for promoting technological progress and standardizing the market order.
According to Professor Wang Xingtian, China’s professional colleges and universities play an important role in improving China’s plastics processing technology. The dynamic vibration extruder, injection molding machine and dynamic rheometer developed by South China University of Technology have both original and integrated innovation, which greatly improves the plasticization quality of the products, reduces the energy consumption during processing, and makes the equipment more efficient and energy-saving. . The engineering visualization technology developed by Beijing University of Chemical Technology lays the foundation for the precision, high-speed and flawlessness of plastic processing. The Ministry of Science and Technology has listed the research and development of precision plastic injection molding equipment as the “Eleventh Five-Year†National Science and Technology Support Program. The research on key technologies and industrialization of precision extrusion molding at Beijing University of Chemical Technology has also been highly effective and has gradually achieved industrialization. In 2007, Zhejiang Province listed the research and development of polymer precision extrusion molding technology and equipment as a major provincial level. Special key projects. Wang Xingtian hopes that professional universities and enterprises should further strengthen cooperation, improve the ability of scientific and technological innovation, transform more scientific and technological achievements into productivity, and upgrade the level of China's plastics machinery processing and manufacturing.
In recent years, the output of plastic machinery in China has grown rapidly, and the series of presses have been completed, forming prominent industrial bases such as Ningbo, Zhoushan, Guangzhou, and Dalian. A group of companies such as Haitian Group that have a certain influence in the international community have also emerged in succession. . Especially after entering the 21st century, China's plastic machinery manufacturing technology has also greatly improved. Many domestic plastic machinery enterprises have adopted the internationally advanced software UGII for development and optimization. The products are equipped with electromechanical components of world-famous brands, thus effectively ensuring the quality of plastic machinery products. In 2007, plastics machinery was also listed for the first time in China's famous brand products.
Statistics from the General Administration of Customs of China show that in 2007, China exported more than 100,000 plastics machinery (excluding ancillary equipment) with a total value of 1.45 billion U.S. dollars and imports of nearly 26,000 units, with a value of 2.56 billion U.S. dollars, although the number of imported machines is only 1/1 of the number of exported machines. 4. However, the amount of imports was 1.1 billion U.S. dollars more than the amount of exports, and the gap between the added value of products is very obvious. Professor Wang Xingtian pointed out that in the current situation, increasing the value of processing technology to increase the added value of Chinese plastics machinery is the only way for the development of China's plastics machinery industry.
Professor Wang Xingtian believes that a country's level and strength of plastic machinery can not only look at production, manufacturing capacity and the production of accessories, only sales and sales are not really strong, the most important indicator is the precision of plastic machinery products Or the ability to repeat accuracy. The ability of plastic machinery to machine the precision of products is a comprehensive indicator for the assessment of machinery and equipment. This indicator is related to many factors, and only if equipment precision is improved can the equipment be operated efficiently. Taking an extruder as an example, if the non-uniformity of the thickness of the formed product is 8% to 10%, the material waste can reach 8%. If the accuracy of product quality is increased from 8% to 10% to 1% to 3%, according to the calculation of China's plastic product output of 33 million tons in 2007, the amount of resin saved per year will be several million tons.
The precision of plastics machinery is also the basis for high-speed operation. Only when precision is achieved, the processing speed of plastics machinery can be increased to save energy. Taking an extruder as an example, the speed of foreign advanced single-screw extruders with a diameter of 30 mm is as high as 3,000 rpm and the output is 300 kg/hr, while the speed of the current domestic extruder of the same type is only 300 rev/min. 30 kg/hour, the gap is huge. Therefore, the dimensional accuracy and repeatability of plastic products can be used as a quality evaluation standard for presses, and also a sign of the strength of a company and a country's plastic machinery manufacturing capabilities. To this end, Wang Xingtian suggested that the accuracy standards and testing standards for plastics machinery should be introduced as soon as possible, which is of great significance for promoting technological progress and standardizing the market order.
According to Professor Wang Xingtian, China’s professional colleges and universities play an important role in improving China’s plastics processing technology. The dynamic vibration extruder, injection molding machine and dynamic rheometer developed by South China University of Technology have both original and integrated innovation, which greatly improves the plasticization quality of the products, reduces the energy consumption during processing, and makes the equipment more efficient and energy-saving. . The engineering visualization technology developed by Beijing University of Chemical Technology lays the foundation for the precision, high-speed and flawlessness of plastic processing. The Ministry of Science and Technology has listed the research and development of precision plastic injection molding equipment as the “Eleventh Five-Year†National Science and Technology Support Program. The research on key technologies and industrialization of precision extrusion molding at Beijing University of Chemical Technology has also been highly effective and has gradually achieved industrialization. In 2007, Zhejiang Province listed the research and development of polymer precision extrusion molding technology and equipment as a major provincial level. Special key projects. Wang Xingtian hopes that professional universities and enterprises should further strengthen cooperation, improve the ability of scientific and technological innovation, transform more scientific and technological achievements into productivity, and upgrade the level of China's plastics machinery processing and manufacturing.
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