2025-06-25
Carbon fiber is a critical material for aerospace, new energy, and other sectors. Its spinning process imposes stringent requirements on the aperture precision and consistency of spinneret micro-holes. Carbon fiber spinning equipment typically uses spinnerets made from heat and corrosion-resistant alloy steels such as GH4169, requiring micro-hole diameter tolerances within 0.002mm and hole spacing errors not exceeding 0.003mm. Failure to meet these specifications results in uneven filament diameters, increased breakage rates, and ultimately compromised carbon fiber strength and modulus.
Meet Precision adopted a technical approach combining ultra-precision five-axis machining centers with micro-hole precision inspection systems. Through a composite process of "micro-hole laser drilling + inner wall polishing," the company achieved machining precision with diameter errors ≤ 0.001mm and spacing errors ≤ 0.002mm. In February 2025, Meet Precision successfully developed 0.12mm carbon fiber dry-jet wet spinning spinneret technology, which was implemented at Shandong University and received high recognition. This capability addresses the historical challenges in spinneret manufacturing for pitch-based carbon fibers, where maintaining smooth inner surfaces and uniform aspect ratios has been critical for stable long-term spinning .
With Meet Precision spinnerets, carbon fiber monofilament diameter deviation decreased from ±0.5μm to ±0.1μm, while tensile strength significantly improved. The spinneret surface undergoes nitriding treatment, achieving hardness of HRC 60-62 and corrosion resistance against spinning solutions exceeding 3,000 hours. After continuous spinning of 100 tons, micro-holes remain clog-free, with filament breakage rates dropping from 3% to 0.1%. The company has established close partnerships with Zhuzhou Times New Materials and Shandong University, providing critical core components supporting domestic carbon fiber production to reduce import dependence. The importance of such precision is underscored by research into orbital drilling techniques for carbon fiber reinforced plastics, where vibration and machining force improvements directly impact hole quality .
