CNC manufacturing is the process of cutting materials. In the process of CNC manufacturing, a variety of CNC materials will be involved, and different materials need to be processed differently. Therefore, we need to learn the main types of materials encountered in CNC machining china.
What follows is the introduction of several major kinds of prototyping materials encountered in CNC machining services.
Plastics
Plastics are mainly composed of synthetic resins, but are called plastics because they are synthesized by chemical forces. Plastic is one of the main CNC materials in CNC fabrication, which contains many kinds of materials, such as ABS, PC, PMMA, POM, etc.
1. ABS
Its full English name is: (Acrylonitrile Butadiene Styrene Acrylonitrile Butadiene Styrene), ABS for abbreviation. ABS are usually light yellow or milky white granular amorphous resins. ABS is one of the most widely used general purpose plastics.
This low-cost engineering plastic offers exceptional mechanical and surface strength and they are widely used in high-impact applications.
About its characteristics: Its impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties are excellent. It also has easy processing, product size stability, good surface gloss characteristics. It is easy to apply, color, also can be surface spray metal, electroplating, welding, hot pressing, bonding and other secondary processing.
Applications: ABS was widely used in machinery, Automotive Parts, electronics, instrumentation, Laboratory Equipment, textile and construction industries, which is a kind of widely used thermoplastic engineering plastics.
2. PC
PC (Poly Carbonate) is a tough and durable, transparent engineering thermoplastic notable for its high impact resistance, temperature resistance and optical properties.
About its characteristics: PC has highly impact resistance, not easily deformed, excellent strength resistance at elevated temperatures, coefficient of thermal expansion is low, good electrical insulation and having heat resistance and flame retardant properties.
Applications: PC was widely used in automotive headlamp lenses and safety shields,
medical/healthcare apparatus, construction industry, sporting goods, appliances, casing and housing, electronic components, connectors, compact discs, telecommunication hardware.
But it is prone to stress cracking, moderate chemical resistance and low scratch resistance
3. PMMA
Also known as PMMA (Poly Methyl-Meta Acrylate) is an amorphous thermoplastic prototyping material with very good optical properties. Acrylic is often used as a glass substitute. Acrylic is hard and stiff but it is brittle and notch sensitive.
About its characteristics: Its characteristic was similar with PC, high impact resistance, good dimensional stability, excellent strength retention at elevated temperatures, low coefficient of thermal expansion, good electrical insulator and having heat resistant and flame retardant properties.
Applications and weakness: Similar with PC.
3. PMMA is a kind of typically parts have translucent look after machining, but transparency can be achieved by highly polishing. Its property of strength, durability, impact resistance and transparency, make it become an ideal material for certain structural applications. Large and complex parts with undercuts can be made in sections and glued.
Concluding Remarks
Plastic is one of the important prototyping materials in CNC machining service. They are rich in variety and performance, and be widely used, which is an ideal material for the CNC prototype fabrication industry. In view of their wide variety and large performance differences, so write this article for you to introduce some common types of plastic, hope to help those who need to choose plastic.
