Injection Molding
9 views
Cracking of PBT Injection-Molded Parts During Assembly
Problem Phenomenon
PBT products crack during assembly (press-fitting, screw tightening, etc.).
Cause Analysis
The internal stress of the product is high, and the assembly stress superimposed exceeds the strength limit; the screw holes have no chamfer, causing stress concentration; the interference is too large.
Solution
Fully anneal the product to reduce internal stress; optimize the assembly design (chamfer, guide section, etc.); control the assembly stress.
Key Takeaway
PBT assembly cracking is an extension of stress management.
Was this helpful?
0 people found this helpful
Thank you for your feedback!