Why Automotive Hot Runner Molds Require Grade-certified Thermocouples

Automotive injection parts including external decoration, interior trim, engine plastic parts and new energy battery shells have very severe requirements on dimensional tolerance, weather resistance and batch consistency. The automobile sector has tight supplier qualification and material certification standards, and typical civilian-grade hot runner thermocouples cannot match the requirements of long-term high stability and high dependability. Automotive hot runner moulds and passing industry quality audit criteria can only be matched by high precision thermocouples grade verified.

Automotive moulds normally run continuously for years with high cycle frequency and continuous mass manufacturing. Thermocouples must provide drift-free accuracy for tens of thousands of working hours. General thermocouples have short life and visible drift after a period of operation. Product size and appearance are unstable, and demanding automobile industry batch consistency standards are not met. Automotive grade thermocouples are certified and use vacuum smelted high purity alloy, comprehensive calibration and integrated sealing process, with very low high temperature ageing attenuation and reliable long-term performance.

Automotive modified plastics and flame-retardant materials are with complicated chemical components, which produce corrosive volatile gas at high temperature. The thermocouple with high-grade Inconel anti-corrosion sheath and laser seamless sealing structure can resist long-term chemical erosion, prevent premature failure. Meanwhile, they have good anti-interference and anti-vibration performance, suitable for the complex electromagnetic environment and mechanical vibration of the automobile automated manufacturing line.

Also, vehicle parts are implemented with tight quality traceability system. Thermocouples can be certified with full of manufacturing batch records, material certificates and calibration reports to meet the criteria of factory audit and customer inspection. The use of uncertified inferior thermocouples will not only cause quality fluctuation and batch scrap loss, but also cause supplier qualification failure and order loss. Therefore, grade approved dedicated thermocouples are the primary essential requirement for automotive hot runner mould support.