PU Foam Machine for Self-Skinning Armrests | Haifeng

This low‑pressure polyurethane foaming machine is designed to produce self‑skinning polyurethane armrests for automotive interiors, office chairs, wheelchairs, medical rehabilitation equipment, and fitness gear such as treadmills and stationary bikes. It also manufactures other human support or grip components with similar structures. The self‑skinning foaming process forms a dense, attractive outer skin and soft foam core inside the mold in a single cycle. The skin and core bond naturally during chemical reaction, eliminating follow‑up fabric or leather wrapping procedures—cutting production steps and labor costs while avoiding common defects like blistering and peeling after long‑term use. The machine features a 200L tank system, discharge flow from 50 to 280 g/s, adjustable A:B ratio of 100:50‑150, and a mixing head speed of 5,200 rpm. The servo direct‑drive precision metering pumps, with optional Coriolis mass flowmeter for closed‑loop control, maintain ±0.3% accuracy. The system reads fluid mass in real time; if viscosity changes cause flow drift, the PLC automatically compensates servo speed to stabilize internal mechanical performance across batches. The fully sealed tank structure effectively isolates ambient moisture—especially critical for isocyanate components—preventing viscosity rise, reduced reactivity, and bubble defects. Finished armrests feature soft, elastic surfaces with outstanding compression resistance, impact resistance, abrasion resistance, and oil resistance, ideal for frequently touched, easily soiled, and worn applications.