Based on your previous focus on the temperature sensing block wear grading standards in hot runner scenarios and the necessity of replacement for severely worn blocks, we can accurately determine if a temperature sensing block is severely worn through three dimensions:
Appearance and Physical Assessment: Upon disassembly, extensive corrosion and structural cracking of the temperature sensing block substrate are visible, with the internal temperature sensing element completely exposed, indicating irreversible structural damage.
Temperature Measurement Performance Assessment: Temperature measurement deviation exceeds 2°C, and accuracy cannot be restored after multiple calibrations; the signal fluctuates frequently or even completely stops, rendering repair worthless.
Operating Condition Assessment: The hot runner temperature control system continuously triggers over-temperature/under-temperature alarms, and injection molded parts frequently exhibit batch defects, which cannot be improved even after ruling out process issues.
Meeting any one of these conditions constitutes severe wear, requiring immediate replacement with a brand new temperature sensing block of the same model to avoid significant production losses due to malfunctioning operation.
