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Twin screw extrusion technology is gradually moving towards high efficiency and energy saving

Release time:2022-11-7

According to the technical report released by the National Development and Reform Commission, the plastic extrusion equipment commonly used in China at present mainly includes conical counter rotating twin-screw extruder, parallel co rotating twin-screw extruder and single screw extruder. The actual specific power of these three types of equipment is basically above 0.14kw/(kg. h). In 2011, the output of plastic products using these three types of extruders in China was about 70 million tons, and only the power consumption of extruders exceeded 8 billion kwh.

The “efficient and energy-saving conical co twin-screw extrusion technology” combines the functional and structural advantages of the two kinds of twin-screw extruders in the world, namely, the conical counter rotating twin-screw extruder and the parallel co rotating twin-screw extruder. By combining the “conical screw” and the “co rotating”, it not only maintains the characteristics of the conical counter rotating twin-screw extruder with large extrusion force, but also achieves the characteristics of the parallel co rotating twin-screw extruder with good plasticizing performance, At the same time, it can also meet the difficult processing requirements such as low rotation and low temperature of the screw, and has the characteristics of high yield and low energy consumption.

The year-on-year output has more than doubled, and the electricity saving rate is about 50%. At present, the technology has been industrialized, and the products have been applied to various plastic granulation, profile extrusion, etc. According to the technical report released by the National Development and Reform Commission, it is estimated that by 2015, the total amount of plastics in China will reach more than 100 million tons. If the technology can be promoted to 30% in the industry, the annual savings capacity will be about 900000.
In addition to its own continuous reform, the development and expansion of the extruder industry also has a lot to do with the support of the entire national policy. Relevant experts suggested that if the country could take plastic machinery as the basic machinery of the industry, as well as machine tools, as an important part of the national equipment industry, it would give special support and preferential policies to advanced plastic machinery, like numerical control machine tools, To promote the plastic machinery industry to play a more obvious leverage role and make greater contributions to the development of China’s equipment industry.

In the future, China’s plastic machine industry will develop in the direction of specialization, serialization, standardization, compounding, miniaturization, large-scale, personalization and intelligence, and meet the requirements of energy conservation, material saving, efficiency and environmental protection to meet the cost saving needs of plastic raw materials and plastic product processing enterprises. This is the mainstream of the development of the world plastic machine industry and the main direction of market demand.

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