CNC machining of nylon yields a surprisingly wide range of surface finishes, each with unique functional and aesthetic qualities. Here's a rundown of the most common options:
1. As-Machined:
- This is the raw product that was just finished being machined; it has visible tool marks and a slightly rough texture.
- It is the most cost-effective option, suitable for parts where functionality takes precedence over aesthetics.
- To improve their appearance, as-machined parts can be given a light sanding or bead blasting.
2. Bead Blasted:
- The part is saturated with tiny glass or plastic beads to create a smooth, matte finish that is highly resistant to wear.
- It's a popular choice for eliminating tool marks and creating a smooth, slightly rough surface.
- Bead blasting also improves paint adhesion and creates a good grip.
3. Media Tumbled:
- Similar to bead blasting, but with a rounded, softer finish from tumbling media like walnut shells or ceramic chips.
- Ideal for creating a more natural appearance and softening edges.
- Suitable for skin nearby or areas that will be touched.
4. Vibratory Finishing:
- Uses a vibrating tub filled with abrasive media to polish and deburr the part, giving it a smooth, slightly glossy finish.
- It offers a better surface finish and is more effective in reaching internal cavities than bead blasting.
- Ideal for parts that require extreme precision in terms of size and appearance.
5. Chemical Smoothing:
- Chemical agents are used to dissolve and remove the outermost layer of nylon, resulting in a smooth and glossy surface.
- Superior optical clarity is offered, rendering it ideal for parts that are translucent or transparent.
- Not suitable for all types of nylon and may require specialized knowledge.
6. Painting and Coating:
- Nylon can be easily painted or coated to change its color, texture, and other characteristics like waterproofing and UV protection.
- Offers a plethora of aesthetically pleasing options and can enhance practical qualities.
- When the surface is appropriately prepared and the appropriate coating is selected, it adheres better and lasts longer.
Your application, intended aesthetics, functional requirements, budget, and other factors will all affect the surface finish that you select for your CNC machining nylon parts. Consulting with a certified CNC machining service provider will help you determine the best course of action for your particular requirements.
