Extrusion & Post
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PTFE Poor Surface Finish
Problem Phenomenon
Scratches, grooves, and uneven textures appear on PTFE surfaces, affecting sealing performance, sliding friction, and electrical insulation reliability.
Cause Analysis
Dull and worn turning or machining tools tear rather than cut the material; incomplete removal of paste extrusion lubricant causes uneven surface; mold surface defects or contaminants are directly transferred to PTFE.
Solution
①Use sharp precision tools and maintain equipment regularly; ②Ensure complete lubricant removal before sintering; ③Keep mold surfaces polished and thoroughly clean; ④Include surface quality in inspection standards.
Key Takeaway
PTFE surface quality is critical for sealing and friction applications; tool sharpness is the foundation on the machining side; mold cleanliness transfer is a detail on the molding side.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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