Low-Pressure PU Foaming Machine | Railway Damping Pads
High-performance PU foam casting system for railway damping pads in high-speed rail, heavy-haul & subway transit. Delivers low-density, lightweight pads with excellent elasticity, impact absorption & dynamic fatigue resistance.
Discharge Flow Rate
Confirm rate and unit on quotation
Metering Accuracy
±0.3%
Tank Configuration
1A1B
Certifications
Confirm applicable documents for the quoted configuration
Product Overview
A high-performance PU foam casting system developed for industrialized manufacturing of elastic pads for high-speed railways, heavy-haul railways, subways and full rail transit systems.
The HF-LPM-1A1B-R is a polyurethane foam casting machine specially developed for railway and subway damping pad production. It features a 1A1B configuration with intelligent control, a high-shear mixing head, and a floating mechanical seal that achieves homogeneous mixing with zero leakage and prevents material backflow during continuous production. Multi-point temperature control keeps deviation within ±2°C to maintain steady material conditions. PLC + touch screen HMI lets operators precisely set ratio, injection volume, injection duration, and temperature for consistent quality of every pad. The machine supports modular upgrades to transform manual or semi-automatic workshops into fully automatic lines, integrating with rotary carousel lines for automatic feeding, multi-station pouring, constant-temperature curing, and robotic demolding.
Damping Pad Production Workflow
Raw Material Preparation
Load polyol and isocyanate components into respective tanks; set temperature and ratio parameters per formulation requirements (A:B = 100:80–120).
Metering & High-Shear Mixing
Precisely meter components at the set ratio and mix at high speed (5,000 rpm) using the high-shear mixing head with floating mechanical seal for homogeneous, void-free dispersion.
Mold Filling & Foaming
Inject the mixed PU foam into molds under controlled temperature and pressure; allow foaming and curing to form microcellular elastic structures with superior vibration damping properties.
Demolding & Finishing
After curing, perform robotic or manual demolding; inspect finished pads for density, hardness, and dimensional accuracy per railway industry standards.
Technical Specifications
All data are based on standard factory testing conditions. Values are for reference; actual performance may vary with formulation and operating environment.
| Technical Parameter | HF-LPM-1A1B-R |
|---|---|
| Model | HF-LPM-1A1B-R |
| Discharge Flow Rate | Confirm discharge rate and unit for the quoted configuration |
| Raw Material Mix Ratio | A : B = 100 : 80 – 120 |
| Tank Volume | 250 L |
| Total Motor Power | 14 kW |
| Mixing Head Rotational Speed | 5000 rpm (adjustable) |
| Metering Accuracy | ±0.3% |
| Core Features | Intelligent control, stable production, premium product properties, reliable operation under harsh railway environments |
| Warranty Period | 1 year |
| Net Weight | 1400 kg |
| Certifications | Confirm applicable documents for the quoted configuration |
| Brand Name | Haifeng |
Key Advantages
The HF-LPM-1A1B-R integrates intelligent control, stable production, superior product properties, and strong adaptability to fully meet the demands of high-volume railway damping pad manufacturing.
Intelligent Control System
High-shear mixing head with floating mechanical seal ensures homogeneous mixing with zero leakage. Multi-point temperature control restricts deviation within ±2°C. PLC + touch screen HMI allows precise setting of ratio, volume, duration and temperature.
Superior Product Performance
Produces low-density, lightweight pads with exceptional elasticity, outstanding impact energy absorption, and superior dynamic flex fatigue resistance. Material offers excellent oil resistance and anti-aging properties for harsh outdoor environments.
Strong Adaptability
Flexible adjustment of formulas and process parameters enables a single unit to produce pads with various densities, hardness and dimensions, meeting diverse demands of high-speed rail, heavy-haul rail and subway projects.
Compatible with Carousel Production Lines
Supports modular upgrade for fully automatic production lines. Seamlessly integrates with rotary carousel lines for one-stop workflows: automatic feeding, multi-station pouring, constant-temperature curing and robotic demolding.
High Output Capacity
Supports thousands of pads per kilometer of track with short single-piece production cycle. Enables unattended continuous operation to comprehensively lift overall production efficiency and output capacity.
Built for Railway Operating Conditions
Withstands heavy impact loads from passing trains and resists permanent deformation after repeated compression and rebound cycles. Maintains stable mechanical performance under intense sunlight, heavy rainfall and drastic temperature fluctuations.
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Integrate the product with our full range of auxiliary equipment for a turnkey polyurethane processing system.
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