Reasons: 1. The blowing pressure is not enough. 2. The preform temperature is slightly lower when blowing.

Solution: 1. Check whether the high pressure filter on the side of the mold is smooth, so as not to affect the high pressure gas supply.

2, check the working condition of the road valve to ensure accurate positioning of the blowing 1 and blowing 2

3. Check the airflow control components of Blowing 1 and Blowing 2 to ensure correct setting and internal smoothness.

4. Ensure that all vents on the mold are unobstructed