SPI 模具表面抛光标准
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Removes all tool and machining marks. Provides good mould release. Mute finish on moulded part, no sheen.
Technical Smooth, polishing only needed for proper moulding function
0.25 - 0.30
5
D-2
0.66 - 0.81
D-3
4.83 - 5.84
polishing
Comments
For mirror or optical finishes. Most time consuming. Steel grade important to results
Removes all tool and machining marks. Provides good mould release. Light reflecting finish on moulded part, some sheen.
0.05 ቤተ መጻሕፍቲ ባይዱ 0.076 0.10 - 0.127 0.23 - 0.25
C-1 C-2 C-3
600 stone 400 stone 320 stone
0.25 - 0.30 0.64 - 0.71 0.97 - 1.07
4 - UN - D 249
0.40
4
D-1
Dry blast glass bead 11, 200 distance at 0.7 Mpa; 5 sec Dry blast 240 oxyde, 125 distance at 0.7 Mpa; 5 sec Dry blast 240 oxyde, 150 distance at 0.7 Mpa; 5 sec
No more in use.
For decorative finishes. Often used for diecast and thermoset cooling. Helps hide shrink marks and other imperfections. Dull, non reflecting finish on moulded or cast part.
Diamond buff grade 3 Diamond buff grade 6 Diamond buff grade 15
B-1 2 - UN - D 249 3 - UN - D 249 3 B-2 B-3
600 grit paper 400 grit paper 320 grit paper
Overview SPI standard for polishing
Philips standard 0 - UN - D 249 1 - UN - D 249 2 SPI (old) 1 SPI (new) A-1 A-2 A-3 Discription Ra in µm (DIN) 0 - 0.025 0.025 - 0.05 0.05 - 0.076