High-Speed Train Model Production Case: 1:8 Scale Fuxing Bullet Train Model
I. Material Selection and Preprocessing
Main Frame:
Material: Aviation-grade aluminum alloy (6061-T6)
Process: CNC precision machining to ensure structural strength and lightweight properties.
Exterior Panels:
Material: ABS engineering plastic
Process: Laser cutting followed by hot pressing to replicate the streamlined curves of the train body.
Detail Components:
Parts such as headlights and bogies: 3D-printed resin (photopolymer)
Surface treatment: Acetone vapor polishing to eliminate layer lines.
II. Core Production Process
Body Assembly:
Aluminum alloy frame secured via riveting + epoxy resin adhesive, with tolerances controlled within ±0.2mm.
ABS shell joined using ultrasonic welding, with seams filled and sanded to achieve a seamless finish.
Detail Reproduction:
Windows: Vacuum-metallized acrylic to simulate double-glazing effects.
Bogie Spring System: Miniaturized 304 stainless steel construction, retaining real compression travel.
III. Surface Treatment and Painting
Primer Application:
Full-body spray with 1200-grit surfacer to fill micro-imperfections.
Color Separation Painting:
Main color (Fuxing white): Automotive-grade metallic paint, applied via electrostatic spraying for uniformity.
Red waistline: Masked spraying for sharp, burr-free edges.
Weathering Effects:
Wheels: Light dry-brushing with rust powder.
Undercarriage: Subtle gray stain spraying to simulate operational wear.
IV. Quality Control and Packaging
Accuracy Verification:
Compared against 3D-scanned data of the actual train, with key part deviations ≤5%.
Dynamic Testing:
Installation of micro-motors for trial runs to ensure bogie-track compatibility.
Shockproof Packaging:
EPE foam nesting + carbon fiber shipping case.
