模具表面要求

向各位请教一样东西，通常我们会看到图纸对产品的表面要求上写着：SPE/SPI之类的，并不是完全理解。请各位多多指教.

应该就是模具加工完成后的表面粗糙度

ding

路过，顶

美国工业协会和工程师协会的标准

没有人有比较完整的资料?

顶一下

Polishing: Smoother part surfaces are achieved using manual mold polishing techniques. Consider a part with tall, thin and curved ribs which need to have an SPI-A2 finish. In this case you should expect a significant cost increase because it is very time consuming to polish deep, narrow slots in molds. And such lengthy polishing times may also affect the lead time for your parts, potentially making it impossible for Protomold to accept your order for our famous 5-day turn.  
Texturing: Given the line-of-sight nature of bead blasting, it may not be possible to texture the sides of minimally drafted ribs on a part because the mold surfaces may be inaccessible. In addition, if the walls of your part are textured it may have an adverse effect on the ability of the part to release from the mold, potentially resulting in unsightly "drag marks". For these reasons we recommend that texture be specified only on areas of the part that are drafted at least 2-3 degrees. And in fact, if your part does not have sufficient draft your ProtoQuote may not even offer these textures as options for you to select (contact your Customer Service representative if this ever becomes an issue).

Currently there are three standards being used to define a finish. They are the OId SPI which has six defined finishes, the New SPI which has 12 finishes, and RMS values which is the measurement of the depth of the scratches.

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