Low-Pressure PU Foaming Machine | Bump Stops
Precision PU system for automotive bump stops, suspension cushions & chassis buffers, with ±0.3% metering, ±2°C temp control, PLC intelligence, and multi‑formula flexible production.
Discharge Flow Rate
50～150 g/s
Mix Ratio (A:B)
100 : 40~90
Metering Accuracy
±0.3%
Temperature Control
±2°C
Product Overview
The HF‑LPM‑2A2B‑A is a precision PU system for bump stops, suspension cushions & chassis buffers, with ±0.3% metering, ±2°C temp control, and PLC automation.
This low-pressure polyurethane foaming machine is designed for precision foaming and molding of polyurethane elastomers, widely applied to high-volume serial production of automotive shock-absorbing parts including bump stops, suspension cushions, travel limit buffers, and chassis anti-collision cushions. The machine features a 200L tank system, discharge flow from 50 to 150 g/s, and an adjustable A:B ratio of 100:40–90. High-precision gear metering pumps with closed-loop flow control maintain metering deviation within ±0.3%. The multi-point constant temperature system keeps material temperature within ±2°C, keeping raw materials in the optimal reaction range. The imported PLC controller and industrial touch screen monitor pouring, cleaning, and air purging in real time, with automatic fault diagnosis and graded audio-visual alarms. Multiple formulas can be stored and switched with one click, lowering reliance on operator experience. Variable frequency motors enable stepless adjustment of flow and ratio—one machine produces bump stops and shock cushions for different vehicle models and hardness grades without hardware replacement. Finished components feature outstanding impact, wear and flex resistance with lightweight design, fully meeting automotive assembly line and OEM quality standards.
Production Workflow
Material Preparation & Temperature Stabilization
Load polyol and isocyanate into 200L tanks; multi‑point constant temperature system stabilizes material temperature within ±2°C per recipe requirements.
Recipe Selection & Parameter Setting
Choose stored formula on PLC touch screen; set A:B ratio (100:40‑90) and flow rate (50‑150 g/s) per part type.
Precision Pouring & Molding
Mixed PU elastomer is poured into molds with closed‑loop metering control; material fills cavity and cures under stable temperature conditions.
Demolding, Trimming & Self‑Diagnostic Cleaning
Open mold; remove finished bump stop/component; automatic cleaning cycle with PLC‑monitored fault diagnosis prepares system for next run.
Technical Specifications
Specifications are based on standard configurations. Custom flow rates, ratios, and tank capacities available upon request.
| Technical Parameter | HF-LPM-2A2B-A |
|---|---|
| Discharge Flow Rate | 50–150 g/s |
| Raw Material Mix Ratio | A:B = 100:40–90 |
| Tank Volume | 200 L |
| Total Motor Power | 15 kW |
| Mixing Head Rotational Speed | 0–8750 rpm (adjustable) |
| Metering Accuracy | ±0.3% |
| Core Features | ±0.3% precision metering, ±2°C stable temperature, high batch consistency, intelligent control |
| Warranty Period | 1 year |
| Net Weight | 1000 kg |
| Certifications | Confirm applicable documents for the quoted configuration |
| Brand Name | Haifeng |
Key Advantages
Six engineering and production benefits that deliver precision, durable automotive shock‑absorbing components with consistent quality, versatile production, and reliable operation.
Precision Metering & Stable Temperature Control
High‑precision gear pumps with closed‑loop flow control achieve ±0.3% metering accuracy. Multi‑point constant temperature system (±2°C) keeps raw materials in optimal reaction range, eliminating hardness and density deviations between batches.
Intelligent Control & Self‑Diagnosis for Reliable Operation
Imported PLC + touch screen monitors pouring, cleaning, and air purging in real time. Automatic fault diagnosis, graded audio‑visual alarms, and clear troubleshooting guidance reduce downtime and operator dependency.
Versatile Production – One Machine, Multiple Vehicle Models
VFD‑driven pumps enable stepless adjustment of flow and ratio. A single machine produces bump stops and shock cushions for different vehicle models and hardness grades—just switch formulas, no hardware replacement required.
Superior Product Quality – Impact, Wear & Flex Resistance
Finished components feature outstanding impact resistance, wear resistance, and flex resistance with lightweight design. Compact, pore‑free interiors and excellent rebound performance ensure no sagging or cracking after long‑term service.
Stable Low‑Pressure Process for Premium Elastomer Parts
Mild low‑pressure stirring avoids overheating and minimizes air bubbles, fully preserving raw material reactivity. Produces microcellular elastomer parts with superior energy absorption and cushioning performance.
24/7 Continuous Operation for High‑Tempo Production
Supports stable 24‑hour continuous operation with low overall power consumption. Fully adapts to high‑intensity, standardized automotive production lines and OEM quality requirements.
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