I. Baseline Calibration Cycles for Different Injection Molding Processes
Ordinary Structural Parts Injection Molding Process (PP/PE/ABS General Materials): The baseline calibration cycle is 6 months. This process requires temperature control accuracy of ≤±2℃. Under normal electromagnetic conditions, RC parameter drift is slow, and frequent calibration is not required.
Medium-Precision Engineering Parts Injection Molding Process (PC/PA6/PA66 Engineering Materials): The baseline calibration cycle is 4 months. This process has higher requirements for temperature stability and requires regular verification of the anti-interference capability of the RC filter to avoid material degradation due to overheating.
High-Precision Optical Grade Injection Molding Process (Optical Grade PC/PMMA): The baseline calibration cycle is 2 months. This process requires a temperature difference of ≤±1℃ across the entire runner. Even small drifts in RC parameters can cause signal delay and temperature oscillations, requiring high-frequency calibration.
Injection Molding Processes for Highly Degradable and Sensitive Materials (PVC/POM/PET):** The baseline calibration cycle is 1.5 months. This process has zero tolerance for overheating; temperature jumps caused by RC filter failure will directly lead to material decomposition, requiring more frequent calibration.
II. Dynamic Adjustment Rules Based on Production Scenarios:
24-Hour Continuous Full-Load Production Scenarios: The calibration cycle for all processes is uniformly shortened by 30%. Long-term operation under power accelerates RC hardware aging, significantly increasing parameter drift.
High Electromagnetic Interference Workshop Scenarios: With multiple high-power injection molding machines clustered nearby and power lines and temperature measurement lines laid on the same cable tray, the calibration cycle for all processes is uniformly shortened by 50% to prevent changes in interference characteristics from causing the original RC parameters to fail.
Cleanroom Low-Interference Scenarios: With standardized workshop wiring and extremely low electromagnetic interference, the calibration cycle for all processes can be extended by 50%, reducing unnecessary maintenance costs.
III. Mandatory Conditions for Triggering Immediate Calibration
Before switching to high-precision/highly sensitive materials, an RC parameter calibration verification must be completed to confirm that the filtering performance meets the standards before production can commence.
After the annual comprehensive maintenance and rewiring of the temperature sensing wires of the hot runner system, RC calibration was immediately performed to match the new signal link impedance characteristics.
In cases of temperature reading jumps and uncontrolled temperature rise overshoot, RC calibration was performed immediately after the faults were repaired to eliminate potential parameter drift risks.
