Low-Pressure PU Foaming Machine | Rail Vibration Pads
High-precision PU foam casting system for small-radius curve rail pads & complex contour elastic pads. Delivers lightweight, high-elasticity products with excellent impact & flex resistance for rail transit.
Discharge Flow Rate
333 – 1100 g/s (adjustable)
Metering Accuracy
±0.3%
Tank Configuration
1A1B
Certifications
Confirm applicable documents for the quoted configuration
Product Overview
A high-precision PU foam casting system for producing small-radius curve rail pads and complex-contour elastic pads with lightweight, high-elasticity, impact-resistant properties for rail transit.
The HF-LPM-1A1B-R is a polyurethane foam casting machine specially developed for rail transit curve vibration pads. It produces customized precision elastomer foam products—small-radius curve rail pads and elastic pads with complex contours. The 1A1B configuration features a high-shear mixing head with floating mechanical seal, ensuring homogeneous mixing and preventing air leakage and material backflow. Multi-point temperature control keeps deviation below ±2°C, while closed-loop flowmeter control and high-precision low-speed gear pumps regulate ratio, injection volume, and temperature for uniform quality. PLC + touch screen supports formula storage and one-click recall with fault self-diagnosis. The modular design enables fast adjustment of flow, ratio, and mold temperature, allowing one unit to produce pads with varying density, hardness, thickness, and surface texture—ideal for customized small-batch, multi-variety manufacturing.
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 dimensi
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 | 333 – 1000 g/s |
| Raw Material Mix Ratio | A : B = 100 : 80 – 120 |
| Tank Volume | 250 L |
| Total Motor Power | 14 kW |
| Mixing Head Rotational Speed | 5000 r/min |
| Metering Accuracy | ±0.3% |
| Core Features | Integrated mechanical performance, extended maintenance cycle, stable production, superior quality, energy-saving design, flexible adaptability |
| 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.
Complete Your Production Line
Integrate the product with our full range of auxiliary equipment for a turnkey polyurethane processing system.
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