Injection Molding
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Glass Fibre injection molded product has oil spots
Problem Phenomenon
Glass Fibre injection molded product after demolding surface shows oil spots, release agent residue or lubricant exudation
Cause Analysis
Release agent sprayed too much or unevenly distributed; Glass Fibre internal lubricant stearic acid type exudes to surface; mold lubricating oil seeps into cavity
Solution
1) Reduce release agent dosage or switch to dry-film release agent; 2) use internal lubricant instead of external release agent; 3) seal mold lubrication parts to prevent oil seeping into cavity; 4) clean product surface to remove oil spots then detect source
Key Takeaway
Oil spots are caused by external sources of release agent and lubricant; reducing release agent and sealing mold lubrication are key
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