In the modern synthetic fiber industrial system, polypropylene spinning machines play a crucial role. As the core equipment for converting polypropylene raw materials into high-value-added filaments, its technical level directly determines the quality, performance and production cost of the final fibers. For industry practitioners, a thorough understanding of the technical principles and core components of polypropylene spinning machines is a crucial step in optimizing the production process.

Technical principle and core components of polypropylene spinning machine

Polypropylene spinning is essentially a process of forming continuous filaments by melting, filtering, metering, spinning, cooling, drawing and winding polypropylene chips. A complete polypropylene spinning production line mainly includes the following core units:

Extrusion melting system: Usually, a screw extruder is adopted. Its design and temperature control accuracy directly affect the uniformity of the melt and the thermal process, which is the basis for ensuring the stability of spinning.

Spinning box and components: This is the heart of spinning. The box provides a stable high-temperature environment. The filter layer, distribution plate and spinneret (micropore size and arrangement) within the spinning assembly directly determine the uniformity and fineness of the primary fibers.

Cooling and forming system: Mostly side blowing or ring blowing devices, by controlling the temperature, humidity, speed and uniformity of the cooling air, the fine flow of the melt solidifies and forms. This is the primary step in controlling the internal structure of fibers, such as crystallization and orientation.

Drawing and heat setting system: Through multiple guide rollers and heat rollers, the filament bundle is stretched and heat-treated to varying degrees, thereby significantly enhancing the strength of the fibers, reducing the elongation rate, and stabilizing their structure. This is the key to the production of high-strength filament and industrial filament.

Winding system: The high-speed winding head wind the finished wire into shape in a specific winding form. The speed, tension control and switching technology directly affect the production efficiency and the quality of the wire barrel.

Jiangxi Donghua Machinery Co., Ltd. is located in Fuzhou, Jiangxi Province, which is known as the "Hometown of talented scholars" and is the birthplace of Wang Anshi and Tang Xianzu. It is situated in the Fuzhou National High-tech Industrial Development Zone. Since its establishment in 2002, the company has been engaged in the research and development, production and sales of complete sets of equipment for chemical fibers. The company has gathered a group of professionals with rich experience in the research and development and production of chemical fiber equipment. It has extensive and close technical cooperation with domestic colleges and universities and research institutions engaged in fiber research such as Donghua University, National University of Defense Technology, and Beijing Institute of Fashion Technology, which enables the products to be constantly updated and always maintain its position in the industry. Years of hard work and hardship have brought about abundant fruits for the company. The company has obtained a number of national invention patents and has become a national high-tech enterprise and a demonstration enterprise for scientific and technological innovation in Jiangxi Province. The company's products range from high-strength spinning equipment for polypropylene to a series of special fiber spinning complete sets of equipment for high-strength and high-modulus polyethylene, aramid, carbon fiber, etc. Sales cover more than 30 provinces, municipalities and autonomous regions across the country, and are also exported to South Asia, Southeast Asia, Russia and other regions. The company brings high-quality products and excellent trust to a wide range of customers in the industry with its technology, products and services. Adhering to the spirit of "innovation and development", the enterprise constantly strives for progress and sincerely looks forward to cooperation to develop together with customers.