SPI Finish Guide - Plastopia
SPI Finish Guide is known as SPI Mold Finish Guide or SPE-SPI Mold Finish Guide. The complete SPI finish standard covers 12 grades from SPI A1 to D3. At below SPI finish chart, we use surface roughness Ra (μm), finishing methods, recommended steels as references to show each grade’s finish.
SPI surface finish chart | SPI Surface Finish
SPI surface finish chart for roughness technology. SPI a1 is comparable to RA.0-1 made by #3 diamond buff. SPI a2 is slightly finer than a1 and RA.1-2 made by #6 diamond buff. SPI a3 has more imperfections than a2 and RA.2-3 made by #15 diamond buff. SPI b1 is finer than a3 and RA.2-3 made by 600 grit.
SPI Surface Finish Standards | SPI mold finish Guide - UPMOLD
SPI c1 is finer than b3 and RA.10-12 made by 600 stone. SPI c2 is slightly finer than c1 and RA.25-28 made by 400 stone. SPI c3 is comparable to RA.38-42 made by 320 stone. SPI d1 is finer than c3 and RA.10-12 made by #11 glass bead sandblasting.
SPI Guidelines | Injection Molding Surface Finish - Fictiv
Nov 11, 2022 — SPI semi-glossy finishes do not have the same shine as higher gloss finishes. That makes SPI B-1, SPI B-2, and SPI B-3 a good choice for parts such as injection molded clips where a medium shine is desirable. As the table below shows, polystyrene parts have an excellent finish and most of the other plastics listed provide good results.
SPI Surface Finish For Injection Molded Parts- SPI Mold Finish …
SPI (Society of Plastic Industry) has defined a standardized surface finish for injection molds to facilitate industrial designers, design engineers, and mold manufacturers. These standardized finishes are known as SPI mold finish.
SPI Mold Finish: Surface Finish For Injection Molded Parts
Feb 27, 2024 — The SPI system provides a standardized method of specifying surface texture and appearance for injection molded plastic parts. It allows designers, mold makers and molders to align on surface finish requirements.
Injection Molding Surface Finish Standards: SPI - RpProto
May 8, 2021 — Learn about SPI injection molding surface finish standards and how they impact the appearance, texture, and functionality of molded parts.
Injection Molding Surface Finishes: SPI and VDI | Xometry Pro
Sep 12, 2023 — Out of the two categories of injection molding surface finishes, SPI grade A and B are considered the smoothest with very low surface roughness and are more expensive. Whereas, from a surface roughness point of view, VDI …
cosmetic quality of plastics, Upmold uses the SPI standard to define finish of plastic injection molded parts. There are twelve grades of finishes specified by the SPI in four categories that range from shiny to dull.
What’s the best SPI surface finish for your injection molded part?
SPI surface/mold finishes produce different results depending on the material you use for injection molding components. The tables below detail how to select the right mold finish and materials for your specific application.
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