The core of quickly re-verifying hot runner sensors is to adopt a strategy of "layered progression + tool reuse + advance preparation." While ensuring verification effectiveness, this reduces the time required for a complete standard verification from 3-4 hours to 1-2 hours. Specific operational methods are as follows:
1. Advance Preparation: Reducing Pre-Preparation Time
Pre-calibrate Instruments: Store verification tools such as infrared thermal imagers and standard thermocouples in a fixed location next to the injection molding workshop and calibrate them weekly to avoid repeated calibration for each verification, saving approximately 20-30 minutes.
Synchronous Cooling/Heating During Production Stoppages: Conduct verification during production mold changeovers. Simultaneously prepare tools and clean holes while the hot runner is cooling down, eliminating the need for additional cooling time.
Pre-set Position Files: Mark the positioning lines for the qualified installation positions in advance. Adjustments can be made by directly aligning with the positioning lines, reducing repeated trial and error time.
2. Simplify the Verification Process: Prioritize Core Verification Items
Select streamlined combinations based on the scenario, skipping unnecessary steps:
|
Scenario |
Rapid Verification Process |
Total Time |
Key Points |
|
Routine Quarterly Verification |
Infrared Thermal Imager Initial Screening + TUS Furnace Temperature Uniformity Test (Only measures core deviation items) |
1~1.5 hours |
Preheat the hot runner in advance, shortening the holding time from 30 minutes to 15 minutes (pre-stabilization ensures accuracy) |
|
Rapid Troubleshooting |
Infrared Thermal Imager Initial Screening + Melt Temperature Comparison |
30~50 minutes |
Skip TUS standard calibration, directly confirm frictional heat error using melt measurement, quickly locate the problem |
|
Verification After Position Fine-tuning |
Infrared Thermal Imager Initial Screening + Melt Temperature Comparison |
20~40 minutes |
Only verify the adjusted channel, no need to re-verify all sensors in the entire mold |
3. Practical Speed-Up Techniques
Multi-Point Synchronous Acquisition: Using a multi-channel temperature recorder to simultaneously acquire TUS data from multiple sensors eliminates the need for individual channel measurements, saving approximately 40% of time for multi-cavity molds.
Utilizing Existing Equipment: If the mold already has a pre-installed melt temperature measurement interface, no additional disassembly is required; direct connection is sufficient for measurement, saving approximately 30 minutes of disassembly/reassembly time.
Pre-set Pass Thresholds for Rapid Judgment: Pre-enter the pass criteria (no infrared hotspots >5℃, TUS deviation ≤ ±2℃, melt error ≤ +5℃) into the recorder. Measurement results are directly output after measurement, eliminating manual calculation time.
4. Accuracy Assurance Rules
Rapid verification does not mean lowering standards. Validity is guaranteed as long as the following three conditions are met:
Tool calibration is qualified, with its own error ≤ ±0.5℃; Infrared scanning is performed after high-speed production to ensure sufficient manifestation of frictional heat;
Frictional heat error is still based on the actual melt measurement results, not on a single infrared scan conclusion.
