Injection Molding
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Glass Fiber Agglomeration in PBT Injection-Molded Parts
Problem Phenomenon
Glass fiber gathering areas (glass fiber clusters) appear locally in the product, and the performance of this area is abnormal.
Cause Analysis
The glass fiber masterbatch or reinforced material is not fully mixed; the screw mixing is insufficient; the glass fiber separates and deposits during injection.
Solution
Use uniformly mixed reinforced material; optimize the screw mixing section design; appropriately adjust the back pressure.
Key Takeaway
PBT glass fiber agglomeration affects product uniformity.
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