Notice of using mandril

1. Check whether the pipe and mould connected well,the pipe has good pull strength ,conformity with machine Pull force. And pipe must be weld with mandril by stainless steel 316L rod and keep correct angle
2. Try to avoid crash on the mandril surface, otherwise it will have scratch inside of pushed pipe.
3. Heating different mandril with different suitable temperature,do like this, can ensure mandril using life.