Steering Wheel PU Integral Skin Molding Line in China

Illustration notice. Process illustrations are not verified photographs of this installation.

Project reference basis. Figures and configuration details are reported in the supplied project brief. They are reference values for the stated application, rather than verified acceptance results or a guarantee for another installation. Confirm the source records, material, tooling, operating schedule and test method when assessing a comparable project.

Haifeng successfully engineered and commissioned an automated polyurethane integral skin molding line for a premier Chinese automotive steering system supplier, achieving 100% molecular coating adhesion with In-Mold Coating (IMC) and stabilizing demold cycles down to 120 seconds. The project delivered high-precision high-pressure metering units, dynamic chemical conditioning loops, and digital interface coordination for the customer's multi-station tilting mold clamping units.

Prior to commissioning, the manufacturer used secondary post-demold spray painting for steering wheel rims. The painted coatings suffered from peel-off and blistering when exposed to driver hand perspiration and solar heat, while manual paint handling created VOC hazards. The customer required an automated high-pressure processing system compatible with water-based in-mold coatings, ensuring exact ±0.5% stoichiometric ratio locking, low-cavity-pressure air venting, and consistent microcellular core density.

Operating since September 2025 on a continuous two-shift production schedule across a 220 m² footprint, the workcell delivers consistent component repeatability. By implementing Haifeng's closed-loop Ratio Lock flow algorithms and anti-drip impingement heads, the client consistently manufactures luxury, wear-resistant steering wheels meeting strict OEM tactile and durability specifications.

Concept illustration: The process image is a concept illustration used to explain the equipment arrangement; it does not document the delivered site.

Haifeng deployed a high-pressure integral skin molding platform engineered for fast-reacting elastomeric formulations:
1. Precision Stoichiometric Ratio Lock: Servo-driven axial piston pumps meter precursors with ±0.5% accuracy, ensuring reproducible skin-to-core density gradients.
2. Tilting Clamp Synchronization: The master PLC digitally interfaces with the clamping press, executing multi-angle tilting (up to 45°) to vent mold air smoothly during injection.
3. Dual-Zone Thermal Stability: Dynamic TCU loops maintain upper and lower mold platens within ±0.5°C, ensuring uniform skin curing against IMC layers.
4. Clean Mechanical Needle Cut-Off: An L-shaped self-cleaning high-pressure mixing head executes instantaneous 0.3s shut-offs without chemical solvent flushes.