I. Real-Time Filling Synchronization Meets Standards
Short-Shot Filling Length Difference: Execute 70%~80% stroke short shots; the filling length deviation between the original slower-performing cavity and other cavities should be ≤2%, and the filling progress should be completely synchronized.
Cavity Pressure Quantification Indicators: The time difference ∆t between the filling stages of each cavity should be ≤0.01~0.03s for small precision products and ≤0.05~0.2s for large products; the difference between filling and holding pressure peak pressure should be <5%, and the pressure curve overlap should be ≥95%.
II. Short-Term Product Consistency Meets Standards
Product Weight Stability: Randomly sample 20 molds; the weight deviation between the original slower-performing cavity and the average weight of other cavities should be ≤1.5%; the coefficient of variation (CV) of the entire batch should be ≤2%.
No Appearance Differentiation Defects: For all sampled products, the original slower-performing cavity should have no appearance defects inconsistent with other cavities, such as missing material, shrinkage marks, burning, or flash.
III. Short- to Medium-Term Production Stability Meets Standards
Dimensional and Physical Property Compliance: After 1-2 hours of continuous production, sampling 50 molds shows that key assembly dimensional deviations are controlled within 1/3 of the product tolerance zone, and mechanical property fluctuations are ≤5%.
Effective Parameter Redundancy: Simulating small parameter fluctuations (temperature reduction of 2℃, injection speed reduction of 5%), the previously slow-filling cavities do not exhibit filling lag again, demonstrating the effectiveness of the parameter-reserved anti-slow-filling redundancy space.
IV. Long-Term Mass Production Reliability Verification Passed
No Data Drift Throughout the Lifecycle: Continuous tracking of 3 production batches (cumulative ≥100,000 mold cycles) shows no gradual drift in filling time and product weight data for the previously slow-filling cavities, nor any trend of decreasing filling speed.
Zero Defect Rate: The percentage of defective products caused by the previously slow filling is reduced to 0, and the mass production yield remains stable at the improved level before optimization, with no recurrence of similar faults.
This set of judgment criteria is fully compatible with your precision hot runner multi-cavity mold production line currently in operation. All indicators can be quickly tested on-site, accurately determining whether parameter optimization has truly been successful without complex equipment.
