CNC Plastic parts

CNC plastic machining:

• Using computer numerical control (CNC) machines to cut plastic blocks into desired shapes,
• Offering high precision without the need for molds.
• It is particularly suitable for prototyping or small-batch production parts.

Which plastics can be CNC machined?

• Mainly common engineering plastics material: ABS, PC (polycarbonate), PMMA (acrylic), PA (nylon), POM (polyoxymethylene), and PEEK.
• POM has high strength and low friction coefficient, making it ideal for gears and bearings;
• PMMA (acrylic) offers excellent transparency but tends to stick to cutting tools;
• PA (nylon) is wear-resistant but its hygroscopic nature affects dimensional stability.
• PEEK provides the best overall performance but is more expensive, commonly used in medical and aerospace applications.
• These materials offer good mechanical properties and are relatively easy to machine.

The advantage of plastic CNC machined:

• CNC plastic processing does not require mold making.
• With CAD files, it can be directly processed.
• The sample production cycle can be completed within the same day.
• Small batch production can range from 1 piece to 1,000 pieces.
• Compared to injection molding, it has no parting lines or layer patterns on the surface, resulting in a smoother appearance.
• The accuracy can reach 0.005 – 0.01mm.
• If you need to produce tens of thousands of pieces, injection molding has a lower cost.
• CNC is more suitable for R&D verification, prototype production, and small batch customization scenarios.

The process of CNC machining plastic parts: