16 Cavity Preform Mold

Unlike conventional molds using shared cooling loops, this system is designed with:
Independent cooling channels per cavity 
Deep-core heat extraction structure 
Moldflow-optimized coolant flow balancing 
Engineering impact:
Eliminates heat accumulation at critical core areas 
Stabilizes PET crystallization behavior during cooling 
Reduces cavity-to-cavity thermal deviation 
Production result:
More stable cycle time over long runs 
Reduced preform deformation during ejection 
Improved consistency in downstream stretch blow molding

PET is extremely sensitive to:
Melt temperature variation 
Flow imbalance 
Pressure loss across cavities 
This system includes:
CNC-machined manifold channels 
Independent thermal zone control 
Pre-balanced flow simulation before assembly 
Optional valve-gate synchronization system 
Production benefits:
Stable weight consistency across all cavities 
Reduced risk of black specks or thermal degradation 
Eliminates short-shot and gate blush defects 
Stable viscosity behavior during long production cycles

All key components are produced under controlled engineering workflow:
5-axis CNC high-speed machining 
Precision grinding (critical surfaces Ra ≤ 0.4 μm) 
Full cavity inspection via CMM measurement system 
Stress-relief heat treatment before final finishing 
Achieved tolerances:
Cavity alignment accuracy: ≤ 0.05 mm 
Neck ring repeatability: ±0.02 mm 
Multi-cavity synchronization stability for continuous production

This mold is optimized not only for production efficiency, but also for factory downtime reduction.
Key features:
Replaceable neck ring inserts (supports multiple neck standards) 
Independent cavity insert replacement system 
Standardized hot runner cartridge design 
Quick-disassembly cooling manifold system 
Operational advantages:
Maintenance time reduced by up to ~40% 
Lower spare parts inventory pressure 
Faster neck finish changeover (e.g., PCO 1881 / 30-25 / 29-25)

Production Performance 
Assuming stable 15-second cycle time:
Cavity count: 16 
Hourly output: ~3,800 – 4,200 preforms 
24-hour output: ~90,000 – 100,000 preforms