How Long Does Hot Runner Sensor Revalidation Take?

The combination of validation techniques determines how long it takes to revalidate hot runner sensors. It typically takes one to four hours, from a quick first screening in ten minutes to a comprehensive validation. The following are the time variations for various validation techniques:

1. Time Reference for Various Validation Combinations

Type of Validation

Method of Usage

Total Duration

Relevant Situations

Quick First Screening

Only scanning with an infrared thermal imager

Ten to thirty minutes

Fast troubleshooting following regular mold replacements and first defect identification

Typical Inspection

TUS furnace temperature uniformity test combined with infrared scanning

1.5–2.5 hours

Regular validation and acceptance every three months following equipment maintenance

Complete Final Examination

Comparison of infrared scanning, TUS testing, and melt measurements

3–4 hours

Troubleshooting batch defects, validating the introduction of new products, and confirmation following sensor position adjustments

Note: The most time-consuming stage in the TUS test is the 30-minute heat stabilization period. The entire time can be reduced by about half an hour by preheating.

 

2. Important Elements Influencing Time Use

Number of Sensors: The overall duration for multi-cavity molds (more than eight cavities) is increased by roughly thirty to forty minutes when four additional sensors are added;

Instrument Preparation: 20 to 30 minutes of preparation time can be saved by pre-calibrating the verification instrument;

Corrections and Adjustments: Rework time will increase by one to two hours if verification is unsuccessful and the sensor positions need to be changed.