PU Foam Machine for Automotive Steering Wheels | Haifeng

This low‑pressure polyurethane foaming machine is dedicated to manufacturing self‑skinning steering wheels for passenger cars, trucks, yacht steering wheels, agricultural machinery, golf carts, and other vehicles. It realizes integrated one‑step molding of the steering wheel skeleton and outer skin, producing finished steering wheels with comfortable hand feel, dense outer skin, and flexible inner core. The machine features a 200L tank system, discharge flow from 50 to 300 g/s, and adjustable A:B ratio of 100:50‑150. The mixing head operates at 5,200 rpm with ±0.3% metering accuracy through precision gear metering pumps and closed‑loop variable frequency speed regulation. The laminar low‑pressure injection ensures smooth, orderly material flow that pushes raw materials into mold cavities while fully exhausting trapped air, fundamentally reducing bubble entrapment defects. The formed outer skin is dense and smooth without secondary covering procedures. The machine adopts a systematic closed‑loop thermodynamic management system with three‑layer jacketed temperature‑controlled tanks, pipeline heat tracing, and mixing head discharge temperature precisely locked within ±0.5°C. The PLC interfaces with mold temperature controllers to create an accurate temperature difference gradient between incoming material and mold surface, enabling rapid densification of the outer skin and minimizing pinholes and orange peel defects. The PLC monitors injection volume, ratio, and mixing proportion in real time for every cycle, ensuring highly unified weight, density, and hardness across all steering wheels within a production batch. The machine supports solvent‑free formula systems with no VOC emissions, meeting automotive interior VOC and odor standards. The compact structure supports optional MES/ERP data interfaces for real‑time traceability and remote O&M, with multi‑formula storage for one‑click recall and fast mold changeover.