Blow Molding
6 views
Deformation of blow molded containers after demolding
Problem Phenomenon
Blow molded containers deform after demolding, shape does not match the design, bottom or side walls warp
Cause Analysis
Insufficient cooling time, container rigidity not established
Mold temperature too high (exceeding the 20-50°C upper limit), slow cooling
Insufficient blowing pressure, parison not fully attached to the mold wall
Parison temperature too high, insufficient rigidity
Improper demolding timing
Solution
Extend cooling time
Reduce mold temperature to the lower value of 20-50°C
Increase blowing pressure
Appropriately reduce parison temperature
Ensure demolding after complete cooling
Key Takeaway
2079851475616104457 deformation needs to start from cooling and blowing
Was this helpful?
0 people found this helpful
Thank you for your feedback!