Plastic CNC machining is one of the most reliable methods for producing high-precision prototypes and functional plastic components. Compared with 3D printing processes such as FDM, SLA, and SLS, CNC machining is often preferred when tight tolerances, superior material performance, or non-printable plastics are required.
Our company has rich experience in making plastic concept models and precise functional components. Understanding the properties of different plastics, with lots of testing and experimentation with pre-heating, tool paths, and other factors, we are able to minimize deformation on plastics such as ABS, PP, PA (nylon), PE, POM (Delrin), etc. 3ERP provides a range of solutions for the machining of plastic parts.
Quality is guaranteed through a comprehensive inspection system equipped with advanced metrology instruments, including:
This ensures that every plastic part meets strict dimensional and surface quality requirements before delivery.
CNC milled plastic parts are very popular in the automotive industry, especially for automobile lighting.When making an outer lens cover, for example, a 3D printed SLA prototype only provides about 60% transparency when compared with a CNC machined PMMA prototype. Marks left by the printer can be a major problem, while SLA printing materials are not as effective as PMMA block.
Light guides are also suited to machining, since they require optical details such as prisms, teeth and other tiny shapes.
CNC machining is widely used for small and medium-size high-strength components like pulleys, clamps and levers, which can be made from engineering plastics.
The process is particularly valuable for parts in custom machinery, where mass production using injection molding would be economically inefficient.
CNC machining is commonly used within the electronics industry to create plastic parts for goods such as semiconductors, IoT equipment and consumer electronics. Many electronic devices are contained within machined plastic enclosures, while CNC machining is also highly useful for the rapid prototyping of various electronic components.
CNC machining is frequently used to make plastic parts for the medical industry. These include medicine dispenser components, handles for surgical tools and components for electronic medical devices.
Consumer products, including household goods, appliances and even sporting goods and toys, are frequently made with CNC machined plastic components.
In addition to the prototyping of parts, CNC machining can be used to fabricate items such as custom models, enclosures, jigs and fixtures.
When special material is needed. If you design a component in a material like PVC, POM, PEI or PEEK, there is virtually no way to 3D print them, since reliable and affordable printing formulations of these plastics are not yet available. Instead, we can get blocks and bars of the materials, which can be used for CNC machining.
When concept models or functional prototypes need a high-quality surface finish. The 3D printing process leaves layer marks on the surface of part that can be difficult to remove. But since we can achieve surfaces of Ra 0.2 from milling, we save a lot of time on finishing.
When parts have tiny details that can only be made from CNC machining. Some small details are not suited to printing. For example, lots of optical patterns are designed with a small radius, and with CNC milling we can achieve radii as small as R 0.05 mm.
Although plastics respond differently to finishing processes compared to metals, a wide range of surface treatment options is available to enhance appearance, texture, and functional performance.
We offer multiple finishing solutions for CNC machined plastic parts, ranging from basic surface refinement to advanced decorative and functional coatings. The most suitable finish depends on material type, application requirements, and aesthetic expectations.
3ERP is the most reliable plastic molding company we have used. After seven orders, they haven’t let us down in terms of quality or delivery. I wouldn’t hesitate to recommend them to other companies looking for rapid-molded parts.
I had a project with a couple of complex plastic molding parts. 3ERP took care of it without any fuss: DFM confirmation, T1 samples confirmation, then the final parts arrived quickly. Overall, working with them was really easy.
Thanks for shipping out our molding parts so quickly! Quality was high, as expected, and the laser engraving and pad printing finishes were especially good. We plan to use 3ERP again for plastic moldings.
