PU Sole Pouring Mold | Footwear
Professional PU independent sole pouring mold with optimized runner/vent design, delivering bubble‑free, flash‑free soles with ±0.1mm precision for safety, casual & outdoor footwear.
Molding Cycle
4～6 min/pair
Dimensional Accuracy
±0.1 mm
Service Life (Aluminum)
Up to 30,000 shots
Service Life (Steel)
Up to 80,000 shots
Product Overview
Professional PU independent sole pouring mold, fully calibrated for Haifeng low‑pressure machines. Optimized runner/vent design eliminates bubbles, shrinkage & uneven density.
This professional PU shoe sole pouring mold is specially designed for independent polyurethane sole production, adopting a shoe‑last‑free structure that focuses solely on mass production of finished PU soles for subsequent upper bonding. The mold features a two‑piece split design with high‑precision polished parting surfaces and strictly controlled clamping clearance, ensuring flat surfaces, neat edges, and full three‑dimensional texture. The internally optimized runner and exhaust groove structure, tailored specifically for liquid PU two‑component reaction molding, ensures uniform material filling and complete internal forming. This effectively eliminates common defects such as material shortage, pores, hollowing, and uneven wall thickness, delivering stable dimensional consistency for batch production. Available in high‑grade aluminum alloy (up to 30,000 shots) and cast steel (up to 80,000 shots) options, the mold supports single‑cavity, double‑cavity, or custom multi‑cavity configurations for high‑output lines. Electric or steam heating maintains constant temperature control at 45‑65°C, compatible with both rotary and linear PU pouring production lines. All structural designs are strictly calibrated to the original operating parameters of Haifeng low‑pressure pouring machines, with representative mold trials and process calibration before production.
Production Workflow
Mold Preparation & Heating
Install mold on Haifeng low‑pressure pouring machine; set temperature (45‑65℃) via electric or steam heating system.
Material Ratio & Pouring
PU polyol and isocyanate are metered and mixed per recipe; liquid material is poured into the closed mold through the optimized runner system.
Curing & Demolding
Material fills cavity uniformly and cures under controlled temperature; open mold after 4‑6 min cycle; remove finished sole.
Finished-Sole Inspection
Trim and inspect finished soles against agreed product dimensions and surface requirements, allowing for formulation-dependent shrinkage. The ±0.1 mm entry is a mold-cavity tolerance, not a universal finished-sole tolerance.
Technical Specifications
Specifications are based on standard PU formulations and Haifeng low‑pressure pouring equipment parameters. Custom cavity layouts and materials are available.
| Technical Parameter | PU independent shoe sole pouring mold |
|---|---|
| Base Material | High-grade aluminum alloy / cast steel, optional according to production batch demand |
| Molding Process | 4–6 minutes per pair (standard sole thickness 8–12mm, single cavity, conventional hardness PU material), calibrated to Haifeng low-pressure pouring process parameters for stable mass production |
| Compatible Materials | Polyurethane polyol + isocyanate dual-component formula, adaptable to PU sole materials of various hardness and density |
| Dimensional Accuracy | ±0.1mm mold cavity tolerance, finished sole dimensional deviation controlled within industry standard range after accounting for PU natural shrinkage |
| Service Life | Aluminum mold: up to 30,000 shots; Steel mold: up to 80,000 shots (under standard constant temperature, standard pouring pressure, conventional PU material and daily standardized maintenance conditions; actual life varies with production workload) |
| Cavity Layout | Single cavity / double cavity optional, customized multi-cavity solutions for high-output production lines |
| Structural Feature | Two-piece split mold design, no shoe last structure, dedicated for independent sole pouring molding |
| Heating Method & Temperature | Electric heating / steam heating, constant temperature control at 45℃–65℃, compatible with rotary and linear PU pouring production lines |
| Warranty | 1-year structural quality guarantee for mold core components, unified full-process technical support from Haifeng |
| Certifications | Confirm applicable documents for the quoted configuration |
| Brand | Haifeng |
Key Advantages
Six engineering and service advantages that ensure fast production launch, consistent quality, and long mold service life for independent PU sole manufacturing.
Precise Equipment Parameter Calibration
Every mold is strictly calibrated to Haifeng low‑pressure machine parameters, with mold trials and process calibration defined for the selected material—saving material costs and accelerating time‑to‑production.
Specialized Independent Sole Structure
Two‑piece split design with polished parting surfaces and controlled clamping clearance delivers flat, neat soles with full texture, perfectly optimized for subsequent upper bonding.
Optimized Runner & Vent Design
Professionally engineered filling and venting system prevents hollowing, bubbles, shrinkage, and uneven density, ensuring consistent batch quality and low flash output.
Premium Materials & Durable Construction
Available in aluminum alloy (30,000 shots) or cast steel (80,000 shots) with CNC precision machining and surface hardening treatment for excellent wear resistance.
Integrated One‑Stop Procurement
Unified quotation, delivery, and after‑sales service from Haifeng for both pouring equipment and molds—eliminating multi‑vendor coordination and ensuring seamless compatibility.
Customized Development & On‑Site Support
Support for non‑standard mold development based on samples/drawings, plus on‑site commissioning, troubleshooting, and long‑term process optimization guidance.
Complete Your Production Line
Integrate the product with our full range of auxiliary equipment for a turnkey polyurethane processing system.
