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The spinneret is one of the important parts of the spinning machine. Its function is to transform the viscous polymer melt or solution through the micropores into a trickle with a specific cross-section, which is solidified by a solidification medium or a solidification bath. And forming a thread. In the spinning process, the spinneret will be blocked by mechanical impurities, carbon fiber, gel, etc., the spinneret hole, when the spinneret hole is partially blocked, the spinning solution will overflow on the outer surface of the spinneret/plate, resulting in the original filament The size is uneven and there are problems such as fineness and hairiness. When the spinneret hole is completely blocked, it will greatly increase the rate of fiber breakage, which has a great impact on the fiber quality, so the spinneret must be cleaned regularly. Drawing Die,Monofilament Spinneret,Monofilament Yarn Spinneret,Multifilament Yarn Spinneret Changzhou Jier Precision Machinery Manufacturing Co., Ltd. , https://www.jier-spinneret.com
Many factories now use ultrasonic cleaning machines to clean the spinneret. Ultrasonic cleaning is a cleaning method that is widely used in the industry and has a good effect. Its working principle is that when the ultrasonic is propagated in the cleaning liquid, the tiny bubbles in the cleaning liquid are in the sound field. Vibration occurs under the action. When the sound pressure reaches a certain value, the bubble will increase rapidly, and then the shock wave can reach thousands of atmospheres when it closes and bursts. The shock wave reduces the adhesion between the stain and the cleaned workpiece and can destroy insoluble stains. And make them dispersed in the cleaning liquid, so as to achieve the purpose of cleaning. Although the bursting energy of the bubbles is very high, because the volume of each bubble is very small, there will be no mechanical damage and obvious temperature rise for the workpiece.
·Guangzhou released the 2025 strategic plan for the automotive industry
On April 17, the Guangzhou Municipal People's Government issued the 2025 strategic plan for the automobile industry in Guangzhou. According to the plan, by 2025, Guangzhou's new energy vehicle production capacity will reach 1 million units, entering the top three in China.
According to the plan, by 2025, Guangzhou's total automobile production capacity will reach 5 million units, and strive to achieve the largest scale of production and sales in China's automobile manufacturing base, and strive to achieve an annual output value of 1 trillion yuan in the automobile manufacturing industry. China's brand cars have a production capacity of 2.5 million units across the country, and the production and sales scale ranks among the top three in China. The overall fuel consumption of the new passenger car dropped to 4 liters / 100 kilometers.
According to the plan, the Guangzhou Municipal Government will focus on supporting automotive frontier technology, common key technology research and development, and automotive industry basic research. Integrate existing municipal industrial funds, establish Guangzhou Automotive Industry Innovation and Development Fund, adopt market-oriented methods such as equity investment, and focus on Chinese brand cars, new energy vehicles, intelligent network vehicles, fuel cell vehicles and core auto parts.
In terms of policy support, financial institutions are encouraged to give priority to credit support for Chinese brand cars, new energy vehicles, intelligent network vehicles, fuel cell vehicles and core auto parts, and to expand corporate financing channels through capital markets, financial leasing, and internet finance. Support auto industry enterprises to make use of multi-level capital markets to become bigger and stronger.
In addition, strengthen the support of land, formulate the key development catalogue of Guangzhou's automobile industry, give priority to the inclusion of automobile projects in the catalogue to provincial and municipal key construction projects, and give green channel support in project approval, planning, land use approval, etc., and give priority to land use.