Low-Pressure PU Foaming Machine | Transparent Shoe Outsoles
Low‑pressure PU casting system for transparent shoe outsoles, with 4‑tank (dual A/B) design, vacuum defoaming, ±0.3% metering accuracy, and automatic head cleaning.
Discharge Flow Rate
30～120 g/s (adjustable)
Mix Ratio (A:B)
1:1～1:4 (adjustable)
Mixing Head Speed
4,000‑10,000 rpm
Metering Accuracy
±0.3%
Product Overview
The HF-LPM-2A2B-F is a 4-tank low-pressure PU foaming system for transparent shoe outsoles, featuring vacuum defoaming, ±0.3% accuracy, and auto head cleaning.
The HF-LPM-2A2B-F is a low-pressure PU foaming machine for manufacturing transparent shoe outsoles. It adopts a 4-tank structure with dual A and dual B tanks, supporting multi-combination mixing of A1, B1, A2, and B2 materials to produce transparent foamed parts with variable densities and colors. Mixed PU is poured directly into open or semi-closed molds, then cured, demolded, cooled, and trimmed. High-precision metering pumps and high-efficiency mixing heads (4,000–10,000 rpm) ensure accurate ratios (±0.3%) and thorough blending, producing fine, uniform foam cells with stable physical properties. PLC + touch screen precisely regulates temperature, pouring volume, and injection duration, with multi-recipe storage for fast switching between colors, hardness levels, and shapes. The automatic casting head cleaning device removes residual material after each pour, preventing bubbles, white spots, and color stains. Vacuum defoaming—using sealed tanks and a dedicated vacuum pump—removes microbubbles from raw materials, with an optional mold cavity vacuum system further eliminating residual air. It integrates with circular/banana production lines, pneumatic mold systems, and robot pouring for highly automated production.
Production Workflow
Material Preparation & Vacuum Defoaming
Load A1/B1/A2/B2 materials into the 4 vacuum‑sealed tanks (120L each); activate vacuum pump to remove microbubbles from raw materials.
Recipe Selection & Ratio Setting
Choose the desired recipe on the PLC touch screen; set A:B ratio (1:1‑1:4), discharge flow (30‑120 g/s), and temperature parameters.
Precision Pouring into Molds
Mixed PU material is cast into open/semi‑closed molds via the casting head; optional mold cavity vacuum auxiliary system further eliminates residual air.
Curing, Demolding & Auto Head Cleaning
Allow the transparent outsole to cure; demold the finished part; automatic casting head cleaning device removes residual materials to prevent contamination.
Technical Specifications
Specifications are based on standard configurations. Customizable component counts (2‑6) and optional mold cavity vacuum auxiliary system available.
| Technical Parameter | HF-LPM-2A2B-F |
|---|---|
| Discharge Flow Rate | 30–120 g/s |
| Raw Material Mix Ratio | A:B = 1:1–1:4 |
| Raw Material Tank Volume | 120 L |
| Total Motor Power | 16.5 kW |
| Mixing Head Rotational Speed | 4,000–10,000 rpm (adjustable) |
| Metering Accuracy | ±0.3% |
| Overall Machine Weight | 1,000 kg |
| Warranty Period | 1 year |
| Compliance Certifications | Confirm applicable documents for the quoted configuration |
| Brand | Haifeng |
| Contact Details | Tel: +86 13566296633E-mail: info@chinahaifeng.com |
Key Advantages
Six engineering and production benefits that ensure high‑yield, crystal‑clear transparent outsole manufacturing with low operating costs.
Precise Metering & Uniform Mixing
High‑precision metering pumps (±0.3%) and high‑efficiency mixing heads (4,000‑10,000 rpm) ensure accurate ratios and thorough blending, delivering fine foam cells and stable physical properties.
4‑Tank Multi‑Combination Capability
Dual A and dual B tank structure supports A1/B1/A2/B2 multi‑combination mixing, enabling production of transparent outsoles with variable densities and colors on a single machine.
Vacuum Defoaming System
Sealed vacuum tanks and dedicated vacuum pump remove microbubbles from raw materials; optional mold cavity vacuum auxiliary further eliminates residual air, drastically reducing pinholes and white spots.
Automatic Casting Head Cleaning
Rapidly removes residual materials after each pour to prevent cured residue contamination; effectively eliminates bubbles, white spots, and color stains in transparent outsoles while reducing manual cleaning frequency.
High Automation & Strong Process Adaptability
PLC + touch screen control with multi‑recipe storage; integrates with circular/banana lines, pneumatic automatic mold systems, and robot pouring for fully automated production.
Controllable Costs & Easy Maintenance
Low‑pressure equipment offers lower manufacturing and maintenance costs compared to high‑pressure systems, effectively cutting initial investment and long‑term operating expenses.
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