A Profile Extrusion Line is a specialized industrial system designed to manufacture continuous plastic profiles with consistent cross-sectional shapes, such as window frames, door trims, pipes, sheets, and decorative moldings. These lines are widely used in construction, automotive, and packaging industries due to their versatility in processing materials like PVC, PE, and wood-plastic composites (WPC). Key components include a twin-screw or conical extruder for melting and homogenizing raw materials, a die to shape the molten polymer, a vacuum calibration system for dimensional accuracy, and downstream equipment like haul-off machines, cutters, and stackers for finishing. Advanced systems support multilayer extrusion for enhanced product performance and energy-efficient production, ensuring high throughput (e.g., up to 500 kg/h for PVC profiles).