The mold design case features a large-scale lampshade (Φ149.61×400cm) manufacturing solution with structural innovations that reduce equipment requirements. The core technical breakthroughs are:

1. Three-Stage Mold Opening Process
   A sequential mechanism of A: Front mold separation → B: Rear mold lateral translation (25mm displacement via hydraulic cylinder) → C: Push plate ejection is implemented. This reduces the mold clamping thickness from conventional 380mm to 230mm, enabling the use of a 250T injection molding machine (50% reduction in tonnage compared to 600T requirement).

2. Thermal Stability Optimization
   By shortening the injection cycle to ≤60s and integrating a rapid cooling system, the engineering solution eliminates heat-induced yellowing of polypropylene (PP) material that occurs during prolonged barrel residence in conventional long-cycle molding (≥90s).

3. Structural Reliability Validation
   The rear mold translation mechanism employs ball guide rails + pressure sensors (±0.05mm detection accuracy) to achieve **±0.02mm positioning repeatability**, ensuring over 200,000 operational cycles while maintaining dimensional stability.

This design demonstrates a cost-effective approach for large thin-walled products through lightweighted parting surface optimization and dynamic thermal management, balancing machine downsizing with color consistency and structural durability.