Low-Pressure PU Foaming Machine | Shoe Production
Versatile low‑pressure PU system for direct‑integrated footwear, supporting casting/injection/spraying modes, with ±0.3% metering accuracy and intelligent PLC control.
Discharge Flow Rate
30～150 g/s (adjustable)
Mix Ratio (A:B)
100 : 40~120
Mixing Head Speed (Casting)
4,000‑10,000 rpm
Metering Accuracy
±0.3%
Product Overview
The HF‑LPM‑2A1B‑F is a low‑pressure PU foaming machine for direct‑integrated shoes, supporting casting/injection/spraying modes with ±0.3% accuracy and PLC automation.
The HF-LPM-2A1B-F is a low-pressure PU foaming machine for manufacturing direct-integrated footwear, where the sole and upper are formed as one piece without gluing. It supports three modes: casting (pouring into open or semi-closed molds), injection (into fully closed molds), and spraying (atomized coating onto workpieces). The machine features a 220L tank, adjustable discharge flow of 30–150 g/s, and a flexible A:B ratio of 100:40–120. Mixing head speed is adjustable per mode—casting (4,000–10,000 rpm), injection (10,000–18,000 rpm), and spraying (2,000–8,000 rpm)—ensuring optimal mixing. With ±0.3% metering accuracy and intelligent PLC control, it monitors pressure, temperature, and flow in real time with full data traceability. The integrated dual-color/density design enables gradient soft-hard zones on a single sole (e.g., cushioned forefoot and supportive heel). Pneumatic mold clamping and needle-valve heads reduce defects and extend mold life. This machine eliminates gluing, drying, and pressing steps, shortening cycles and cutting labor costs—ideal for multi-variety, small-batch production, with optional automated assembly line integration.
Production Workflow
Material Preparation & Recipe Selection
Load polyol and isocyanate into the 220L tank; select the desired recipe (casting/injection/spraying) on the PLC touch screen and set ratio (100:40‑120) and flow (30‑150 g/s).
Mixing Mode Selection
Choose the appropriate processing mode—casting (open mold), injection (closed mold), or spraying (atomized coating)—and adjust mixing head speed accordingly.
Material Delivery & Pouring/Injection/Spraying
The machine precisely meters and mixes the two components, then delivers the PU material into the mold or onto the workpiece via the selected method.
Curing, Demolding & Cleanup
Allow the PU to foam and cure; demold the integrated shoe; automatic cleaning cycle prepares the system for the next production run.
Technical Specifications
Specifications are based on standard configurations. Customizable component counts (2‑6) and optional automated assembly line solutions available.
| Technical Parameter | HF-LPM-2A1B-F |
|---|---|
| Discharge Flow Rate | 30–150 g/s (adjustable) |
| Raw Material Mix Ratio | A:B = 100:40–120 |
| Tank Volume | 220 L |
| Motor Power | 11 kW |
| Mixing Head Rotational Speed | Casting: 4,000–10,000 rpm (adjustable)Injection: 10,000–18,000 rpm (adjustable)Spraying: 2,000–8,000 rpm (adjustable) |
| Metering Accuracy | ±0.3% |
| Core Features | Short production workflow, wide product compatibility, stable product quality, intelligent control, high automation level |
| Warranty Period | 1 year |
| Net Weight | 1,500 kg |
| Certifications | Confirm applicable documents for the quoted configuration |
| Brand Name | Haifeng |
Key Advantages
Six engineering and production benefits that streamline direct‑integrated footwear manufacturing with high quality, flexibility, and automation.
Integrated Molding with Streamlined Workflow
Realizes one‑piece sole‑upper integration, eliminating glue separation defects. Removes gluing, drying, and pressing steps, shortening production cycles and reducing labor costs.
Three Processing Modes in One Machine
Supports casting, injection, and spraying modes with independently adjustable mixing head speeds, covering the full spectrum of direct‑integrated footwear production.
Wide Product Compatibility & Fast Model Switching
Dual‑color/density design enables gradient soft‑hard zones on a single sole; pneumatic clamping and needle‑valve heads reduce defects and extend mold life, ideal for multi‑variety, small‑batch production.
Intelligent PLC Control with Full Automation
Real‑time monitoring of pressure, temperature, and flow; historical data traceability and export for quality analysis; minimizes manual intervention and supports stable 24/7 production.
Superior Homogeneous Mixing & Bubble‑Free Quality
±0.3% metering accuracy and self‑developed mixing head technology ensure highly uniform mixing, bubble‑free product surfaces, and consistent quality across batches.
Optional Automated Assembly Line Integration
Accelerates production rhythm, further lowers labor costs, and eliminates quality risks from uneven manual gluing—perfect for scaling up to high‑volume operations.
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