VAD Chemical Vapor Deposition Preform Lathe
This lathe-based system deposits silica soot layers via Vapor Axial Deposition (VAD) to build cylindrical optical fiber preforms, followed by sintering. It rotates the target mandrel during deposition for uniform growth. HTS 8475.21.00.00 covers such machines essential for modern optical fiber manufacturing.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If primarily for plastic injection molding
Plastic processing machines in 8477 if adapted for polymer optical fibers.
If for semiconductor wafer processing equipment
Similar CVD tools for silicon wafers classified under statistical notes elsewhere.
If basic sintering furnaces only
Standalone medical/industrial sintering ovens without deposition in 8419.
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Import Tips & Compliance
• Document CVD process parameters specific to silica glass for telecommunications fiber
• Avoid classifying as general lathe (8458); emphasize preform deposition function
• Include safety data for chemical precursors used in deposition
Related Products under HTS 8475.21.00.00
Preform Etching Station
Automated hydrofluoric acid etching station removes surface defects from optical fiber preforms, improving fiber strength. Precise chemical dosing and rinsing. HTS 8475.21.00.00 for preform processing machinery.
Optical Preform Grinder
Precision grinder shapes ends of optical fiber preforms to exact geometry for fiber drawing process, with diamond tooling for silica glass. Maintains flatness critical for draw quality. Classified HTS 8475.21.00.00.
Integrated Preform Manufacturing Line
Complete turnkey line combining VAD deposition, sintering, dehydration, and collapsing for high-volume optical fiber preform production. PLC controlled with recipe management. HTS 8475.21.00.00 for complete optical fiber making systems.
Fluorine-Doped Preform Plasma Processor
Plasma processor dopes optical fiber preforms with fluorine using downstream microwave plasma for depressed cladding index profiles in dispersion-shifted fibers. Critical for DWDM systems. Under HTS 8475.21.00.00.
Fiber Preform Dehydration Oven
Oven removes hydroxyl impurities from soot preforms using chlorine gas at elevated temperatures, essential for low-loss optical fibers. Controlled humidity environment. Specialized under HTS 8475.21.00.00.
Czochralski Crystal Puller for Optical Fiber Preforms
This machine uses the Czochralski method to grow high-purity silica monocrystalline boules from which optical fiber preforms are sliced. It melts silica in a crucible and slowly pulls a seed crystal to form the boule under precise temperature control. Classified under HTS 8475.21.00.00 as it is specifically designed for producing preforms used in optical fiber manufacturing.