Injection Plastic Mold Polishing Guideline
| Grade | finished type | Average Value (μm) | Deviation (μm) | Ra Center Average Roughness (μm) | SPI No. | Description |
|---|---|---|---|---|---|---|
| over 200000# | 0.07 | 0.062~0.082 | 0.003~0.01 | A0 | ||
| 14000# | 1 Diamond Buff | 1 | 1~2 | 0.019~0.025 | A0 | |
| 10000# | 2 Diamond Buff | 2 | 1~3 | 0.02~0.028 | A1 | |
| 8000# | 3 Diamond Buff | 3 | 2~4 | 0.025~0.03 | A1,A2 | |
| 5000# | 4~5 Diamond Buff | 4.5 | 3~6 | 0.029~0.04 | A2 | |
| 3000# | 6 Diamond Buff | 6 | 4~8 | 0.032~0.045 | A2,A3 | |
| 2000# | 8 Diamond Buff | 8 | 6~10 | 0.04~0.06 | A3 | |
| 1000# | 15 Diamond Buff | 15 | 10~20 | 0.06~0.07 | A3 | |
| 1000# | 15 Sandpaper | 15 | 10~20 | 0.07~0.08 | ||
| 800# | 21 Gritting paper | 21 | 18~24 | 0.08~0.095 | ||
| 600# | 30 Sandpaper | 30 | 25~35 | 0.09~0.1 | B1 | |
| 400# | 37 Sandpaper | 37 | 30~44 | 0.11~0.12 | B2 | |
| 320# | 45 Sandpaper | 45 | 40~50 | 0.12~0.16 | B3 | |
| 600# | 30 Whetstone | 30 | 30~37 | 0.16~0.17 | C1 | |
| 400# | 37 Whetstone | 37 | 30~44 | 0.23~0.27 | C2 | |
| 320# | 45 Whetstone | 45 | 40~50 | 0.34~0.39 | C3 | |
| Dry Blast | 11# Glass Bead | 0.92~0.99 | D1 | |||
| Dry Blast | # 240 Oxide | 1.77~1.89 | D2 | |||
| Dry Blast | # 24 Oxide | 3.15~3.58 | D3 | |||
| EDM | 3A EDM | 3.62~4.31 | 3A | |||
| EDM | 2A EDM | 2.33~2.41 | 2A | |||
| EDM | 1.5A EDM | 2.07~2.14 | 1.5A | |||
| EDM | 1A EDM | 1.31~1.53 | 1A |
