PU Foam Machine for Self-Skinning PU Seats | Haifeng

This low‑pressure polyurethane foaming machine is designed to produce self‑skinning polyurethane seats and headrests for passenger cars, motorcycles, bicycles, construction vehicles, wheelchairs, office chairs, and electric mobility scooters. The self‑skinning process forms a dense, wear‑resistant, waterproof, and stain‑proof outer skin with a soft, high‑rebound micro‑elastic inner core in a single molding cycle. By precisely controlling the injection ratio and material flow distribution, the machine delivers a composite structure that improves pressure distribution uniformity by 30% and prevents sagging after prolonged use. Microcellular foaming technology reduces product weight by 15% at equal volume to meet lightweight requirements. The machine features a 200L tank system, discharge flow from 50 to 300 g/s, adjustable A:B ratio of 1:1‑1:4, and a mixing head speed of 5,200 rpm. Precision gear metering pumps with closed‑loop VFD control maintain ±0.3% accuracy, ensuring fully homogenized, bubble‑free material mixing. The PLC touchscreen control system monitors pouring, cleaning, and air purging in real time, with graded fault alarms and safety interlocks. Multiple formulas can be stored and switched with one tap, dramatically reducing changeover time. The self‑cleaning mixing head enables color and material switching without shutdown, boosting flexible production efficiency. The machine supports solvent‑free polyurethane systems with near‑zero VOC emissions and Class B1 flame retardancy, complying with national and EU standards. The compact structure supports flexible line configurations—from long‑arm single‑operator models to fully automatic rotary carousel lines—with modular expansion capabilities for phased investment.