Before engineers produce plastic parts with CNC machines, they must review the unique attributes of each material. After all, not all plastics are alike and can fulfill the requirements of every project. Engineers should consider the demands of their applications and choose materials that meet their needs. Find out the key factors to consider in CNC plastics selection so you can make an informed decision on your next project.
Material Strength
One trait that engineers should consider is material strength, which can affect a plastic’s suitability for various applications. For example, if they need an incredibly durable plastic that does not easily wear, they may want to try Vespel®, which aerospace companies use.
If engineers need a rigid product, they should try Ultem®, which manufacturers incorporate into parts for the aerospace and medical sectors. By picking a material with the right strength, end-users can rely on the products.
Thermal Resistance
Another key factor to consider in CNC plastic selection is the material’s thermal resistance. A material with a high thermal resistance can perform under extreme temperature fluctuations. For example, polyether ether ketone (PEEK) can withstand temperatures of up to 480 degrees Fahrenheit. Choosing a plastic based on the expected temperature prevents warping, degradation, or component failure during use.
Chemical Resistance
Engineers should also consider chemical resistance when choosing materials for CNC plastic machining. Although some chemical interactions can compromise the integrity of some plastics, others stay strong. One such material is Torlon®, which resists acids. It is ideal for use in the industrial, laboratory, and chemical processing sectors.
By selecting materials with the ideal resistance profiles, engineers can ensure their components maintain structural integrity when exposed to aggressive agents.
Workability
The workability of a plastic reflects its response to CNC machining operations, such as cutting, drilling, or milling. For example, when engineers want a plastic that is easy to machine but offers additional qualities, including chemical and wear resistance, they may want to use nylon. The workability of a material can also help manufacturers avoid tool wear and increase efficiency in their production runs.
Find the Material You Need at Plastic Machining Inc.
Now that you know how to select plastics for CNC machining, you can create great-quality products. Plastic Machining Inc. can also help with its CNC services. Our team members can advise you on which plastics you should use and provide components that will meet your needs.
