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技術資料
Comparison of Standard Manufacturing Processes
The chart below summarizes the characteristics of the manufacturing processes we offer to help you choose the right one for your products.
| PROCESS | DIE CASTINGS | PRECISION SAND CASTINGS | RUBBER PLASTER MOLDING | INVESTMENT CASTINGS | PERMANENT MOLDING | GRAPHITE PERMANENT MOLD |
| Weight Range | 0-30 lb (0-15kg) | 0-45kg | 0~ 12 kg | 0-20 lb (0~±10 kg.) | 0 ~ 45 kg. | 0 ~5 kg |
| Tolerance | ±0.002" (±0.1mm); add ±0.015" across parting lines | ±0.5-3.0mm | ±0.2~3 mm | ±0.003" to 1/4"; 0.004" to 1/2"; ±0.005" to 3"; then add 0.003" per inch | ±0.4mm | ±0.2mm |
| Flatness | Within 0.2mm (geometry dependent) | Within 0.5mm (geometry dependent) | Within 0.3 mm (geometry dependent) | Within 0.015" (0.2mm) (geometry dependent) | Within 0.3mm (geometry dependent) | Within 0.2mm (geometry dependent) |
| Surface Finsh | 32-63 RMS | 120-175 RMS, except on cored areas | 63-125 RMS | 63-125 RMS | 150-300 RMS | 63 RMS or better |
| Minimum Draft Required | 1° to 3° | 0.5° to 3° | 1/2° to 2° | None | 2° to 4° | 1° to 2° |
| Minimum Wall Section | 0.030"-0.060" (0.8-5mm) | Typical: 3.5-5mm; Minimum: 2.0 (geometry dependent) | Typical: 2.5~5mm. Minimum: 1.0 (geometry dependent) | 0.060" (1.5mm) | 5 mm | 2.5mm |
| Typical Quantities | >2,000 | All | <2,000 | <1,000 | >500 | 500-1500 |
| Typical Tooling Cost (N.R.E.) | $3k-$100k | $800-$4k | $3K - 15K | $3K - 10K | $5K - 15K | $1.5K - 5.5K |
| Nominal Lead Time | Samples: 4-6 wks; Production: 4-6 wks after 1st article approval | Samples:1 - 4 wks. Production:1 - 5 wks. after approval. | Samples:2 - 4 wks. Production:1 - 5 wks. after approval. | Samples:2-4 wks. Production:5-12 wks. after approval. | Samples:8 - 20 wks. Production:10 - 12 wks. after approval | Samples:3 - 6 wks. Production:2 - 4 wks. after approval. Lifetime use. |
