Plastic is one of the common materials used in CNC machining, let's look at the types of plastic that are mostly used in CNC machining.
1. ABS
ABS is one of five synthetic resins with excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties. It's easy processing, stable and easy coloring. It can also carry out processing such as metal coating, electroplating, welding, hot pressing, and bonding. Thermoplastic engineering plastics are widely used in industrial fields such as machinery, automobiles, electronics, instruments, textiles, and construction.
ABS is usually beige or white, and is one of the most widely used engineering plastics.
2. Nylon PA6
PA6 material has quite high comprehensive performance, including mechanical strength, stiffness, toughness, mechanical damping and wear resistance.
These properties, combined with good electrical insulation and chemical resistance, make PA6 a "universal" material for the production of mechanical structural components and maintenance components.
3. Nylon PA66
Compared with PA6, PA66 has better mechanical strength, stiffness, heat resistance, wear resistance and creep resistance, but lower impact strength and mechanical damping performance, so it is suitable for automatic lathe processing. PA66 is widely used in the automotive industry, instrument housings and other products that require impact resistance and high strength.
4. POM
POM is a tough and elastic material that exhibits good creep resistance, geometric stability and impact resistance even at low temperatures.
POM has homopolymer and copolymer materials. Homopolymer materials have good ductility and fatigue strength, but are difficult to process.
The copolymer material has good thermal stability, good chemical stability and convenient processing.
Homopolymer materials and copolymer materials are crystalline materials that are difficult to absorb water.
The high crystallinity of POM leads to very high shrinkage, which can reach 2% to 3.5%.
Different steel bars have different shrinkage rates. POM has an extremely low coefficient of friction and good geometric stability, especially suitable for the manufacture of gears and bearings.
Due to its high temperature resistance, plumbing equipment (valves, pump boxes) is also used in lawn equipment, etc.
Materials for making toys such as video cameras, CD, LD, MD players, radios, headphones, stereos, OA equipment and other audio equipment, printers, keyboards, CD-ROM drives, washing machines, dryers, dryers, auto parts , such as seat belt mechanical parts, door handles, mirrors, engine rooms, cameras, watches, precision parts such as building materials, game consoles and stationery.
5. PMMA
PMMA has the advantages of good transparency, good chemical stability, good mechanical properties, good weather resistance, easy dyeing, easy processing, and beautiful appearance.
This material is widely used in lamp boxes, nameplates, etc.
6. PC
Polycarbonate (PC) is a polymer containing carbonate alkali in its molecular chain.
According to the structure of the ester group, it can be divided into aliphatic, aromatic, and fatty aromatic.
Aliphatic and aliphatic aromatic polycarbonates have limited use in engineering plastics due to their low mechanical properties.
The three main application areas of PC engineering plastics are glass assembly industry, automobile industry, and electrical and electronic industry, followed by industrial machinery parts, optical discs, packaging, computers and other office equipment, medical and health care, films, and leisure protective equipment.
7. PEEK
PEEK is a special engineering plastic with excellent performance.
Compared with other special engineering plastics, it is resistant to positive high temperature of 260 degrees, good mechanical properties, good self-lubricating property, strong chemical corrosion
resistance, strong flame retardancy, strong peeling resistance, strong wear resistance, strong nitric acid, concentrated sulfuric acid, radiation resistance.
It's widely used in high-end machinery, nuclear engineering and aviation, etc.