Injection Molding
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MP injection molded products have oil spots
Problem Phenomenon
MP injection molded products show oil spots on the surface after demolding, mold release agent residue or lubricant exudation
Cause Analysis
mold release agent sprayed too much or unevenly distributed; MP internal lubricant stearic acid type exudes to the surface; mold lubricating oil seeps into the cavity
Solution
1) reduce mold release agent amount or switch to dry-film release agent; 2) use internal lubricant instead of external release agent; 3) seal mold lubrication points to prevent oil seeping into the cavity; 4) clean the product surface to remove oil spots then test the 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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