Extrusion Line

Extrusion lines are a common and fundamental continuous production system in modern industry. Their core mission is to shape a specific raw material, typically a thermoplastic, into a long, uniformly shaped product through a continuous process. Imagine its operating principle as similar to the familiar extrusion process: the raw material, whether in granular, powdered, or preformed form, is first steadily fed into the front end of the system. There, intense mechanical shear forces combined with precisely controlled heat cause the material to undergo a softening-plasticization transition, becoming more fluid. This viscous stream is then forcefully pushed through a precisely designed forming die. The shape of the die's pores determines the cross-section of the final product, much like dough being squeezed through a pastry nozzle to create various shapes. While the hot, shaped product emerges from the die, it is still unstable and soft. Next, it enters a carefully designed cooling stage, where the temperature rapidly decreases through contact or environmental influences, allowing the shape and internal structure to solidify. Finally, these cooled and shaped continuous profiles are smoothly pulled out by subsequent pulling devices and, depending on the needs of the end use, cut or otherwise processed into the required length or coiled. The entire process, from raw material input to finished product output, is typically highly automated, efficient, and continuous, forming an indispensable industrial foundation for the manufacture of various plastic, rubber, and even some metal products with consistent cross-sectional characteristics.