CNC Machining with Plastics like Polycarbonate and UHMW

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  • Source:Axom



In the world of precision manufacturing, metals often take center stage. However, the strategic use of engineering plastics like Polycarbonate (PC) and UltraHighMolecularWeight Polyethylene (UHMW) can be a gamechanger for countless applications. Mastering CNC machining with these materials opens up a world of possibilities, offering unique properties that metals cannot provide.


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Polycarbonate is renowned for its exceptional impact strength and clarity. It is virtually unbreakable, making it an ideal choice for protective shields, safety components, and transparent enclosures. Its good dimensional stability and resistance to weathering further expand its use into automotive, medical, and consumer electronics fields. When machining PC, the primary challenges are its tendency to soften with heat and its susceptibility to stress cracking. Success hinges on using sharp, polished cutting tools, appropriate coolants, and optimized feeds and speeds to achieve a superior, stressfree finish.

In contrast, UHMW is a tough, abrasionresistant champion. It has an extremely low coefficient of friction and high chemical resistance, making it perfect for wear strips, gears, liners, and components in material handling equipment. However, UHMW's unique properties also make it notoriously difficult to machine. Its high toughness and flexibility can lead to material "spring back," making it challenging to hold tight tolerances. It also has a low melting point and poor thermal conductivity, meaning heat buildup must be meticulously managed to prevent gumming and deformation. Techniques like using extremely sharp, positiverake tools and compressed air for cooling are critical for success.

At our onestop CNC machining facility, we possess the specialized expertise to navigate these complexities. We understand that machining plastics is not the same as machining metals; it requires a distinct approach to tooling, fixturing, and machining parameters. Our engineers select the right grade of material for your application and employ proven strategies to mitigate challenges like heat accumulation and internal stresses.

By leveraging our capabilities in CNC machining with advanced plastics, you can create lighter, corrosionresistant, selflubricating, and costeffective components. Partner with us to unlock the full potential of Polycarbonate, UHMW, and other engineering plastics, driving innovation and efficiency in your products. Let us help you build better, smarter, and more durable solutions.