Blow Molding vs Injection Molding vs Rotational Molding
Hollow part manufacturing methods comparison.
Process Selection
Blow molding: for thin-wall hollow containers, bottles, tanks. Injection molding: for solid parts, complex geometries. Rotational molding: for large hollow parts, thick wall, low volume. Blow molding tooling: $5000-50000. Rotomolding tooling: $10000-30000. Cycle times: blow 15-60s, injection 30-120s, rotomolding 20-60 min. All three processes available from Chinese manufacturers with competitive pricing.
| Parameter | Blow Molding | Injection | Rotational |
|---|---|---|---|
| Wall thickness | 0.3-3mm | 1-5mm | 3-15mm |
| Tooling cost | $5000-50000 | $3000-200000 | $10000-30000 |
| Min order | 10000+ | 1000+ | 100+ |
| Complexity | Simple hollow | Complex 3D | Medium hollow |