1. The pre-blowing time is too late.
2. The pre-blowing pressure is too low.
3. The pre-blowing flow is too small.
4. The bottom temperature is low.
5. The bottle mouth temperature is too high.
1. The pre-blowing time is too late.
2. The pre-blowing pressure is too low.
3. The pre-blowing flow is too small.
4. The bottom temperature is low.
5. The bottle mouth temperature is too high.