Injection Molding
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POM exposed glass fiber floating fibers
Problem Phenomenon
Glass fiber patterns and even exposed fibers are visible on the surface of reinforced POM products, and the surface is still uneven after painting.
Cause Analysis
Low melt temperature or mold temperature causes the surface resin to solidify before fully encapsulating the fibers; slow injection speed and insufficient holding pressure also bring fibers close to the surface.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①Appropriately increase melt and mold temperature; ②increase injection speed; ③strengthen holding pressure to densify the surface layer; ④polish the cavity to improve replication.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Floating fibers affect appearance and coating quality; temperature and speed improve surface encapsulation capability and are a general method for surface management of reinforced materials.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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