The increasing availability of a wide variety of different options in plastics has created an increased demand for custom shops to be able to provide machining of the parts and components.
Plastic parts and components can be made in several ways, just as with metal. Extrusion of plastic is a common option for round or square external shapes and complex interiors. Injection molding is also a good option for thermoplastics, particularly for those parts with thin and consistent interior and exterior walls. However, this process is expensive, and it can easily become cost-ineffective on large volume orders.
The third option for forming parts made from the rigid types of plastics is through CNC plastic machining. This process, just like CNC machining for metals, provides high levels of precision and the option to create complex interior and exterior shapes. This offers a very low-cost production option that can be easily scaled up to meet production demands when working with a top machining service.
Specialized Shops
While CNC plastic machining is not a new process, it is new for many metalworking shops. When looking for a service provider, always consider past experience in working with plastic, as there are some different machine tool considerations and machine settings to consider.
The specific type of cutting tool to provide the smooth, even finish on the surface area of the cut depends on the specific type of plastic. Softer plastics are more challenging to work with as they naturally bend and move under the pressure of the cutting tool, resulting in distortions.
With the correct choice of tools, materials and the speed of the operation, these distortions can be eliminated in CNC plastic machining. This takes experience in working with plastics to develop, and correctly selected cutting tools and machining center settings can result in high degrees in tolerances and precision machined final products.
