Plastic CNC Prototype Machining /3D Prototype CNC Machined Components

In plastic CNC machining (Digital Computer Control), the part is manufactured by machining in the mass of a plastic block by digital milling machines. This rapid prototyping technology is suitable for unit production in the context of functional testing.

CNC machining of plastic prototype parts is a so-called “subtractive” method because there is removal of material. A wide selection of resins allows parts to be obtained in the “right material”, thus allowing mechanical properties close to the injection-moulded part (ABS, PC, PP, PVC, POM, PMMA, PA 6/66).

This is the most efficient and economical technology for the rapid manufacturing of fewer than ten prototypes or plastic models.

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In manufacturing, computer numerical control (CNC) or simply numerical control (NC) is the automated control of machining tools (drills, boring tools, lathes) by means of a computer, in which a NC machine operates on a piece of material (metal, plastic, wood, ceramic, or composite) to transform it to precise specifications. NC machines combine a motorized maneuverable tool and often a motorized maneuverable platform, which are both controlled by a computer core, according to specific input instructions. Instructions are delivered to an NC machine in the form of graphical computer-aided design (CAD) files, which are transformed into a sequential program of machine control instructions, and then executed.

As with CNC subtractive methods, the computer-aided-design – computer-aided manufacturing CAD -CAM workflow in the traditional Rapid Prototyping process starts with the creation of geometric data, either as a 3D solid using a CAD workstation, or 2D slices using a scanning device. For Rapid prototyping this data must represent a valid geometric model; namely, one whose boundary surfaces enclose a finite volume, contain no holes exposing the interior, and do not fold back on themselves.