Injection Molding
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Poor '2079851475616104452 accuracy of PBT gears
Problem Phenomenon
After PBT gear '2079851475616104452, the tooth profile accuracy is out of tolerance and the meshing is poor.
Cause Analysis
The shrinkage rate of PBT is affected by crystallinity and glass fiber orientation and fluctuates greatly; anisotropic shrinkage causes tooth profile deformation; the mold design does not fully consider shrinkage compensation.
Solution
The mold design adopts a scaled cavity with corrected shrinkage; use high glass fiber content to reduce shrinkage anisotropy; stabilize process parameters.
Key Takeaway
PBT gear accuracy requires precise shrinkage compensation design.
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