A computer-controlled machine tool removes material from a workpiece to create a desired shape or feature in a subtractive manufacturing process called CNC machining, or computer numerical control machining. This robust and adaptable technology finds application across multiple sectors, including consumer goods, automotive, aerospace, and medical. CNC machining offers several advantages over other methods for creating plastic parts, particularly in specific situations. Here's a breakdown of the key advantages:

l High precision and accuracy: CNC machines guarantee consistent dimensions and surface finishes down to the micron level by operating on computer-controlled instructions. This is especially important for parts that require complex features or tight tolerances, which can be difficult to achieve with other techniques like injection molding.

l Versatility: CNC machining is capable of processing a greater variety of plastics than other techniques such as injection molding, which frequently necessitates particular material qualities for effective manufacturing. More personalization and flexibility in response to various project requirements are made possible by this.

l Low waste: Unlike injection molding, which frequently produces scrap material during the production process, CNC machining removes material only when necessary, minimizing waste. Both financial and environmental factors may benefit from this.

l Rapid prototyping: Prototypes can be made rapidly and iteratively with CNC machining, which facilitates design validation and revisions prior to large-scale production. This can help to reduce risks and expedite the development process.

l Small production runs: CNC machining is cost-effective for small production runs compared to injection molding, which requires high upfront tooling costs. This makes it a viable option for projects with limited quantities or unique designs.

l Surface finish control: CNC machining can produce a range of surface finishes, from rough to mirror-polished, contingent on the needs of the intended use. This makes it possible to customize the surface to maximize both its usefulness and beauty.

l Design freedom: Compared to other techniques like traditional machining, CNC machining makes it easier to create complex geometries and internal features, giving designers more creative freedom.