We provide you ultimate guide on explantion of SPI surface finish standard, process how to make SPI finish, references of SPI finish cards/plaques and conversion to VDI 3400 textures.

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.

2024年1月5日 · Acorn-Gencon Plastics 使用塑料工业协会制定的标准 (SPI) 定义塑料产品的抛光类型。 SPI 是美国的一个塑料行业协会，负责制定行业标准。其中，有一个标准规定了模压塑料制品的抛光方法。

VDI 3400 Surface Finish（俗称VDI表面光洁度）是指由德国工程师协会Verein Deutscher Ingenieure（VDI）制定的模具纹理标准。 VDI 3400 表面光洁度在模具加工时主要采用电火花加工 (EDM) 加工。

There are twelve grades of finishes specified by the SPI in four categories that range from shiny to dull. Each grade has different requirements for allowable deviation from perfect, with lower numbers allowing for less deviation and higher numbers allowing for more deviation.

2022年11月11日 · SPI guidelines provide injection molders and product designers with a standard way to describe the surface finish of molded plastic parts. These guidelines were defined by the Society of the Plastics Industry (SPI), a U.S.-based trade association that’s now known as the Plastics Industry Association (PIA, or PLASTICS).

2025年1月9日 · The SPI surface finish chart is a powerful tool for ensuring precision and consistency in surface finishes. By understanding the chart’s categories, Ra values, and tolerances, manufacturers can make informed decisions about surface finishes and achieve exceptional results.

Discover which is the best SPI surface finish for your injection moulded part. This guide covers the SPI standards and results you can expect

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表面處理是由塑膠工業協會（Society of the Plastics Industry）制定的美國表面光潔度標準系統，用於對塑膠注射模具的表面紋理進行分類 . SPI 表面處理標準涵蓋 12 個 SPI 拋光錶面等級，從高光澤、鏡面表面 (A1) 到粗糙、霧面 (D3)。