I. Reference Calibration Cycles for Different Process Scenarios
Ordinary Structural Part Injection Molding Process (PP/PE/ABS General Materials): The reference recalibration cycle after RC parameter locking is 12 months. This process requires temperature accuracy ≤ ±2℃. Under locked conditions, RC parameter drift is extremely slow, requiring no high-frequency calibration.
Medium-Precision Engineering Part Injection Molding Process (PC/PA6/PA66 Engineering Materials): The reference recalibration cycle is 8 months. This process has higher requirements for temperature stability and requires regular verification of RC filter anti-interference capabilities to avoid material degradation due to overheating.
High-Precision Optical Grade Injection Molding Process (Optical Grade PC/PMMA): The reference recalibration cycle is 4 months. This process requires a temperature difference of ≤ ±1℃ across the entire runner. Even small RC parameter drift can cause signal delay and temperature oscillation, requiring more frequent calibration.
Injection Molding Process for Highly Degradable and Sensitive Materials (PVC/POM/PET): The reference recalibration cycle is 3 months. This process has zero tolerance for over-temperature; temperature jumps caused by RC filter failure will directly lead to material decomposition, requiring high-frequency calibration and verification.
II. Dynamic Adjustment Rules Based on Production Conditions
24-Hour Continuous Full-Load Production Scenario: The calibration cycle for all processes is uniformly shortened by 30%. Long-term power-on operation accelerates RC hardware aging, significantly increasing parameter drift.
High Electromagnetic Interference Workshop Scenario: 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 avoid performance degradation of locked RC parameters due to changes in interference characteristics.
Cleanroom Low-Interference Scenario: 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
After the hot runner system completes its annual comprehensive maintenance and temperature measurement lines are rewired, RC calibration is immediately performed to match the new signal link impedance characteristics.
The workshop has added high-power frequency converters and servo motors, which are strong sources of interference, significantly altering the electromagnetic environment. It is necessary to immediately calibrate RC parameters to adapt to the new interference characteristics.
Faults such as temperature reading jumps and uncontrolled temperature rise overshoot have occurred. RC calibration was performed immediately after fault repair to eliminate potential parameter drift risks.
