The use of high-temperature engineering plastics such as PEEK, PPS, LCP, PEI, and PA46 is increasing in automotive, aerospace, and medical industries. These materials require high processing temperatures, which place strict demands on thermocouple performance. Correct thermocouple selection directly affects molding stability and part quality.
Top hot runner brands including Mold-Masters, Husky, Synventive, and HRSflow provide specialized systems for high-temperature plastics. These systems use heaters and thermocouples capable of long-term work above 350°C. Type K thermocouples are the standard choice due to their excellent heat resistance and oxidation stability.
Hot runner technology for high-temperature materials emphasizes thermal stability, fast response, and durability. Thermocouples must maintain accurate readings without drift or aging under extreme heat. Mineral-insulated structures with Inconel or stainless steel sheaths are widely used to resist corrosion and deformation.
Thermocouple products for high-temperature applications feature high-temperature cables, secure connectors, and tight mounting. Cables must withstand continuous heat without cracking or insulation failure. Small-diameter fast-response probes help control melt viscosity precisely.
Key applications include automotive engine parts, medical implants, electrical connectors, and precision components. These products require stable material properties and high dimensional accuracy, which depend on reliable temperature control.
Common problems include thermocouple drift, cable burnout, sheath oxidation, and loose contact at high temperatures. Using Type J thermocouples in high-temperature zones leads to rapid failure and severe errors. Regular replacement and calibration are necessary.
In summary, high-temperature plastics require thermocouples with excellent heat resistance, stability, and durability. Type K mineral-insulated sensors are the most suitable choice. Correct selection and installation ensure stable production and extend hot runner service life.
