What does SPI stand for surface finish?
SPI is the short form of the Society of Plastic Industry, who establish standards for plastic industry and the SPI Plastic Engineering Handbooks is one of the most important reference for engineers. SPI defines the polishing standard on mold finish and widely applied in US markets.
What finishes can be applied to plastic?
The many options for plastic part surface finishes include:
- Bead blast.
- Etching.
- Matte finish.
- Leather grains.
- Geometric.
- Graphics.
- Many more.
What is plastic graining?
Texturing—sometimes referred to as graining or engraving—is the process of adding a pattern (the texture or grain) to the molding surface of a mold. Compared to finishing each molded product, texturing or graining of a mold is a very economical way to impress complex designs or patterns on molded plastic parts.
What are the types of surface finishes?
There are a several surface finishes available through a painted and textured process. Surface finishes can range from smooth and shiny to rough and non-reflective. A few common surface finishes usually consist of specialty grains, etching, sandblasting, polishing, and silk screening.
Which process gives high quality surface finish?
Explanation: Honing is a surface finishing operation used to give better surface finish and have very small material removal rate.
How to check surface finish?
How to Check Surface Finish Visually inspect the surfaces. Visually inspect the surfaces, and run your fingers along the edges of the surface to check for roughness. In Use a roughness gauge for higher precision. Compare the readings. See More….
What is mean by surface finish in engineering drawing?
Surface finish is the term used to describe the texture of a surface, and it is sometimes used interchangeably with the term surface texture. Requirements for surface finish are frequently found on technical drawings for mechanical parts, particularly where parts fit together tightly, move against each other, or form a seal.
What is the definition of surface finish?
Surface finish, also known as surface texture or surface topography, is the nature of a surface as defined by the three characteristics of lay, surface roughness, and waviness.
What is surface finish?
Surface Finish is a measure of the overall texture of a surface that is characterized by the lay, surface roughness, and waviness of the surface. Surface Finish when it is intended to include all three characteristics is often called Surface Texture to avoid confusion, since machinists often refer to Surface Roughness as Surface Finish.