What's wrong with plastic mold welding products?

Poor processability. After the sudden change of temperature, the carbon content of local metal in the plastic mold changed, which affected its key properties such as strength, toughness and high temperature resistance, and made its rework performance worse. If it is used as a mold in an environment without temperature, the impact is not great. If it is a high-temperature non-disposable mold, then this mold cannot be used.