Polyurethane Low-Pressure Foaming Machine for OTR Polyurethane Solid Tires
Compact PU system for OTR solid tires, with IBC direct feed, plunger metering (±0.3%), static mixing, pressure safety control, and complete air treatment system.
Discharge Flow Rate
300～1000 L/h
Mix Ratio (A:B)
100 : 100
Metering Accuracy
±0.3%
Working Pressure
0～2 MPa
Product Overview
The HF‑LPM‑1A1B‑OTR is a compact PU system for OTR solid tires, featuring IBC direct feed, plunger metering (±0.3%), static mixing, and complete air treatment.
This low‑pressure polyurethane foaming machine is designed for manufacturing OTR (Off‑the‑Road) polyurethane solid tires, fitting two‑component polyurethane raw material systems. Two independent metering units draw materials directly from IBC totes for uninterrupted supply. Plunger metering pumps driven by variable frequency motors deliver metering accuracy of ≤0.3%, with flow rates regulated by adjusting motor speed to meet various formulation requirements. Raw materials are blended via a static mixer that offers leak‑proof, anti‑clogging performance with easy cleaning and maintenance. A glue shut‑off valve at the outlet enables quick connection with tire air nozzles. The working pressure of raw materials is limited within 0‑2 MPa, with automatic injection stop and alarm activation once the pressure exceeds the threshold. Each A and B pipeline is fitted with a 300 μm mesh filter to block impurities. The machine adopts PLC control with an HMI touch panel for user‑friendly operation, displaying real‑time data including A/B flow rates, sampling duration, component pressure, and post‑filling tire pressure. Built‑in multi‑level fault detection with audio‑visual alarms triggers automatic shutdown under critical malfunctions. The system includes separate pipelines for raw material transfer and compressed air delivery, with compressed air pre‑processed through oil‑water separators and oil mist eliminators to ensure clean, dry air supply. Remote injection start/stop switches and reserved remote maintenance ports provide convenient after‑sales support.
Production Workflow
Raw Material Feeding from IBC Totes
Two independent metering units draw polyurethane components A and B directly from IBC tote tanks for continuous production.
High‑Precision Metering & Ratio Setting
Plunger metering pumps with VFD control deliver ±0.3% accuracy; flow rate is adjusted per formula (standard A:B = 100:100).
Static Mixing & Tire Filling
Materials pass through 300μm filters and blend in the static mixer; mixed PU is pumped into tire cavities via glue shut‑off valve connected to tire air nozzles.
Pressure Control, Venting & Curing
Complete tire filling is achieved through controlled pressure (0‑2 MPa) and venting; overpressure triggers automatic shutdown and alarms.
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Contact UsTechnical Specifications
Specifications are based on standard configurations. Custom flow rates, tank sizes, and remote maintenance interfaces available upon request.
Key Advantages
Six engineering and production benefits that deliver durable, high‑performance OTR solid tires with precision control, safety protection, and easy maintenance.
High‑Precision Plunger Metering & Stable Delivery
Plunger metering pumps with variable frequency motors deliver ±0.3% accuracy. Flow rate is precisely regulated to meet various mixing ratios, ensuring consistent tire quality across batches.
Wide Flow Range for Versatile Production
Discharge flow rate from 300 to 1000 L/h covers a broad range of OTR tire sizes and filling requirements, from smaller agricultural tires to large mining equipment tires.
Superior Filtration & Anti‑Clog Static Mixing
300 μm mesh filters on each pipeline block impurities effectively. The static mixer offers leak‑proof, anti‑clogging performance with easy cleaning and maintenance.
Intelligent PLC Control with Comprehensive Safety Protection
PLC + HMI touch panel displays real‑time flow rates, pressure, and tire fill status. Multi‑level fault detection with audio‑visual alarms and automatic shutdown protects equipment and ensures safety.
Complete Air Treatment System for Clean Operation
Separate compressed air pipelines with oil‑water separators and oil mist eliminators deliver clean, dry air—critical for consistent PU curing and preventing contamination.
Compact Design with Remote Operation & Maintenance
Lightweight (160‑180 kg) and compact footprint fits easily into existing workshops. Remote injection start/stop switches and reserved remote maintenance ports enable convenient after‑sales support.
Start Your Durable OTR Solid Tire Production Today
Haifeng supplies specialized PU systems for OTR solid tires, complete production line solutions, and turnkey services—covering equipment selection, installation, operator training, and full‑lifecycle after‑sales support.
Industries & Applications
The HF‑LPM‑1A1B‑OTR is designed for manufacturing OTR polyurethane solid tires used in construction equipment, mining machinery, agricultural vehicles, forklifts, and other off‑road applications where puncture resistance, load‑bearing capacity, and long service life are critical. The system supports two‑component PU formulations with IBC direct feed for continuous mass production.
Download the Full Technical Brochure & OTR Solid Tire Production Guide
Contact UsComplete Your Production Line
Integrate the product with our full range of auxiliary equipment for a turnkey polyurethane processing system.
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