Based on our previous discussion of the characteristics of PTFE wires in hot runner scenarios, the risks of direct welding, and compliant repair solutions, the cold-pressing method combined with double-layer fluoroplastic heat shrink tubing insulation is the fastest and most reliable repair method suitable for hot runner conditions. The entire process can be completed in 10-15 minutes, with the following steps:
Quick Pre-treatment: After power is off, remove the damaged section of insulation at the break point and clean the oxide layer from the wire core surface.
Quick Connection: Use a compatible cold-pressing terminal to press the two wire core sections together. No welding is required to avoid high-temperature damage to the surrounding PTFE insulation layer.
Quick Insulation Protection: Apply two layers of fluoroplastic heat shrink tubing with a temperature resistance of ≥260℃. Quickly heat and shrink the tubing with a heat gun to completely cover the joint.
Quick Verification: Retest the insulation resistance with a megohmmeter. If it is ≥100MΩ, and there are no abnormalities, the wire can be quickly restored to use.
This method completely avoids the risk of thermal damage from direct welding, is suitable for high-temperature operating conditions in hot runners, and can quickly resolve breakpoint faults. It is only a temporary emergency solution, and it is still recommended to replace the wires with brand new pure material when the opportunity arises.
