39th Precision Sheet Metal Technology Fair

Sheet metal parts (47 entries)

Parts029

Plastic Sheet Metal Processing

  • ・Size: W100 x D90 x H40 mm

  • ・Accuracy: ± 0.3 mm

  • ・Programming time: 60 min

  • ・Processing time: 120 min/quantity

  • ・Quantity: 1

  • ・Material: ペット樹脂

  • ・Thickness: 1.0 mm

  • ・Type: Original work

Process

  • CAD/CAM

  • Punching

  • Bending

Strengths

Using standard sheet metal bending machinery typically reserved for metal, a complex 3D structure was formed from a single, highly brittle 1 mm plastic sheet solely through multiple precision bending operations. Because plastic fractures easily and exhibits a distinct springback behavior unlike metal, delicate control of tonnage and bending angles is required. By carefully observing the material's behavior, consistent and high-precision sequential bends were achieved. When folding a intricate form from a single sheet, slight dimensional deviations after each bend can lead to overall distortion; therefore, precise blank layout calculations and bending sequences were thoroughly optimized to create a flawless 3D geometry without dedicated tooling. This project serves as a demonstration of applying sheet metal craftsmanship to non-metallic materials and highlights new potential for low-volume production.