high-mirror-polishing-tooling-room-upmold

Injection Plastic Mold Polishing Operation Guideline Chart

 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