PU Foam Machine for Shoe Insoles | Haifeng

This low‑pressure polyurethane foaming machine is specially designed for manufacturing all types of single‑color and dual‑color insoles, including PU memory insoles, slow‑rebound/high‑rebound insoles, antibacterial breathable insoles, shoe midsoles, shock‑absorbing sheets, arch support pads, medical orthotic insoles, and health functional insoles. The machine flexibly supports MDI and TDI systems, as well as rigid and soft foaming formulations, covering the full production spectrum from daily comfort insoles to professional medical orthotic insoles. Using casting technology, mixed PU raw materials are poured directly into open or semi‑closed molds, then cured, demolded, cooled, and trimmed to finished products. The machine features a 120L tank system, discharge flow from 30 to 85 g/s, adjustable A:B ratio of 1:1‑1:4, and a mixing head speed of 4,000‑10,000 rpm. The low‑residence‑volume mixing head and fast‑cleaning valve group enable color and material system switching within 3‑5 minutes, reducing cleaning time and material waste by 30%‑50%. The self‑cleaning needle‑valve injection head with low‑residence flow channel design automatically scrapes residual materials after each injection, preventing blockage during frequent start‑stop cycles typical of insole production. Combined with closed‑loop micro‑flow control, the machine ensures accurate mixing ratio even under small discharge volumes, effectively reducing reject rates. The PLC + touch screen control system stores multiple recipes for one‑click switching. The machine integrates with circular/banana‑type production lines, pneumatic automatic mold systems, and robotic casting arms for highly automated continuous production, greatly reducing labor costs. With a compact layout and only 8 kW rated power, it offers low energy consumption and a low investment threshold, ideal for insole OEM factories and start‑up footwear enterprises.