How To Choose The Plastic Material Used For Cnc Machining

In the field of mechanical parts machining industry, plastics are often used as raw materials for further machining. Now there are many types of plastics on the market. So what kind of plastic should be selected when machining mechanical parts? Today, let me make the company’s small Let me tell everyone!


1. ABS plastic
ABS parts manufacturing process
CNC machining / prototype production / injection molding / blister / 3D printing
ABS material characteristics and application
ABS resin is one of the five major synthetic resins. It has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties. It also has the characteristics of easy plastic machining, stable product dimensions, good surface gloss, etc., and it is easy to paint , Coloring, it can also be used for secondary machining such as surface metal spraying, electroplating, welding, hot pressing and bonding. It is widely used in machinery, automobiles, electronic appliances, instrumentation, textiles and construction and other industrial fields. Wide range of engineering thermoplastics. ABS is usually a pale yellow or milky white granular amorphous resin. ABS is one of the most widely used engineering plastics.
2. Nylon PA6
Nylon manufacturing process
CNC machining / prototype production / injection molding / 3D printing
Characteristics and application of nylon PA6
The material has the most superior comprehensive properties, including mechanical strength, stiffness, toughness, mechanical shock absorption and wear resistance. These characteristics, coupled with good electrical insulation and chemical resistance, make nylon 6 a "universal grade" material for the manufacture of mechanical structural parts and maintainable parts.
3. Nylon PA66
Nylon PA66 manufacturing process
CNC machining / prototype production / injection molding / 3D printing
Characteristics and application of nylon PA66
Compared with nylon 6, its mechanical strength, stiffness, heat resistance, wear resistance, and creep resistance are better, but the impact strength and mechanical shock absorption performance are reduced, which is very suitable for automatic lathe machining. PA66 is more widely used in the automotive industry, instrument housings and other products that require impact resistance and high strength requirements.
4. Nylon PA12
Nylon PA12 manufacturing process
CNC machining / prototype production / injection molding / 3D printing
Characteristics and application of nylon PA12
The scientific name of PA12 is polylaurolactam, also known as nylon 12. The basic raw material for polymerization is butadiene, which can rely on petrochemicals. It is a semi-crystalline-crystalline thermoplastic material. Its characteristics are similar to PA11, but the crystal structure is different. PA12 is a good electrical insulator and will not affect the insulation performance due to moisture like other polyamides. It has good impact resistance and chemical stability. There are many improved varieties of PA12 in terms of plasticizing properties and strengthening properties. Compared with PA6 and PA66, these materials have a lower melting point and density, and a very high moisture regain. PA12 has no resistance to strong oxidizing acids. Typical applications of nylon 12: water meters and other commercial equipment, cable sets, mechanical cams, sliding mechanisms, photovoltaic backplanes and bearings, etc.
5. PVC
PVC manufacturing process
CNC machining / prototype production / injection molding
PVC characteristics and applications
Polyvinyl chloride, abbreviated as PVC (Polyvinyl chloride) in English, is a vinyl chloride monomer (VCM) in peroxide, azo compound and other initiators; or under the action of light and heat according to the free radical polymerization reaction mechanism Polymers formed by polymerization. Vinyl chloride homopolymer and vinyl chloride copolymer are collectively referred to as vinyl chloride resin. PVC used to be the world's largest production of general-purpose plastics, and it is widely used. It is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers, etc.
6. POM Sai Steel
POM manufacturing process
CNC machining / prototype production / injection molding
POM characteristics and applications
POM is a tough and elastic material that has good creep resistance, geometric stability and impact resistance even at low temperatures. POM has both homopolymer materials and copolymer materials. Homopolymer materials have good ductility and fatigue strength, but they are not easy to process. Copolymer materials have good thermal and chemical stability and are easy to process. Both homopolymer and copolymer materials are crystalline materials and cannot easily absorb moisture. The high degree of crystallinity of POM leads to a very high shrinkage rate, which can be as high as 2% to 3.5%. There are different shrinkage rates for a variety of different reinforced materials. POM has a very low coefficient of friction and good geometric stability, especially suitable for making gears and bearings. Because it also has high temperature resistance, it is also used in pipeline devices (valves, pump housings), lawn equipment, etc. Audio equipment such as video recorders, CD, LD, MD players, radios, earphones, stereo speakers, OA equipment such as printers, keyboards, CD-ROM drives, washing machines, dryers, hair dryers and other household appliances, seat belt mechanical parts, exterior doors Automobile parts such as handles, mirrors, and engine rooms, as well as precision parts such as cameras and clocks, and molding materials such as building materials, game consoles and other toys and stationery.
7. Bakelite
Bakelite manufacturing process
CNC machining / prototype production
Bakelite characteristics and applications
Bakelite is the first type of plastic to be put into industrial production. It has high mechanical strength, good insulation, heat resistance and corrosion resistance, so it is often used in the manufacture of electrical materials, such as switches, lamp holders, earphones, telephone cases, instrument cases, etc. .
8. Plexiglass PMMA acrylic
Acrylic manufacturing process
CNC machining / prototype production / injection molding / blister
Acrylic characteristics and applications
Polymethyl methacrylate (Polymethyl methacrylate) is a popular name, abbreviated as PMMA. The chemical name of this transparent polymer material is polymethyl methacrylate, which is a polymer compound formed by the polymerization of methyl methacrylate. It is an important thermoplastic that was developed earlier. Plexiglass is divided into four types: colorless and transparent, colored and transparent, pearlescent, and embossed plexiglass. Plexiglass is commonly known as acrylic, Zhongxuan acrylic, and acrylic. Plexiglass has good transparency, chemical stability, mechanical properties and weather resistance, easy to dye, easy to process, and beautiful appearance. Plexiglass is also called gelatin glass, acrylic and so on. This material is widely used in the production of advertising light boxes and nameplates.
9. PC
PC manufacturing process
CNC machining / prototype production / injection molding / blister
PC characteristics and applications
Polycarbonate (PC for short) is a high molecular weight polymer containing carbonate groups in the molecular chain. According to the structure of the ester group, it can be divided into aliphatic, aromatic, aliphatic-aromatic and other types. Among them, the lower mechanical properties of aliphatic and aliphatic-aromatic polycarbonates limit their application in engineering plastics. The three major application fields of PC engineering plastics are glass assembly industry, automobile industry and electronics and electrical industry, followed by industrial machinery parts, optical discs, packaging, computers and other office equipment, medical and health care, films, leisure and protective equipment, etc.
10. PP
PP manufacturing process
CNC machining / prototype production / injection
PP characteristics and applications
Polypropylene is a kind of thermoplastic resin made by polymerization of propylene. The relative density is small, only 0.89-0.91, which is one of the lightest varieties in plastics. Due to the high crystallinity, the surface stiffness and scratch resistance of this material are very good. PP does not have the problem of environmental stress cracking.
11. PPS
PPS manufacturing process
CNC machining / prototype production
PPS characteristics and applications
PPS plastic (polyphenylene sulfide) is a thermoplastic special engineering plastic with excellent comprehensive properties. Its outstanding features are high temperature resistance, corrosion resistance and superior mechanical properties. Excellent electrical insulation (especially high-frequency insulation), white hard and brittle, metallic noise when dropped on the ground, light transmittance second only to plexiglass, coloring, water resistance, and chemical stability. It has excellent flame retardancy and is a non-combustible plastic. The strength is general, the rigidity is good, but it is brittle and easy to cause stress brittleness; it is not resistant to organic solvents such as benzene and gasoline; the long-term use temperature can reach 260 degrees, and it is stable in 400 degrees air or nitrogen. After modification by adding glass fiber or other reinforcing materials, the impact strength can be greatly improved, heat resistance and other mechanical properties are also improved, the density is increased to 1.6-1.9, and the molding shrinkage rate is as small as 0.15-0.25%. Used in the production of heat-resistant parts, insulating parts, chemical instruments, optical instruments and other parts.
12. PEEK
PEEK manufacturing process
CNC machining / prototype production
PEEK characteristics and applications
Polyether ether ketone (PEEK) resin is a special engineering plastic with excellent performance. Compared with other special engineering plastics, it has more significant advantages. It has a positive high temperature resistance of 260 degrees, excellent mechanical properties, good self-lubrication, and chemical corrosion resistance. , Flame retardant, peeling resistance, abrasion resistance, intolerance to strong nitric acid, concentrated sulfuric acid, radiation resistance, super mechanical properties, can be used in high-end machinery, nuclear engineering and aviation technology.
13. Teflon PTFE
Teflon manufacturing process
CNC machining / prototype production
Teflon characteristics and applications
Polytetrafluoroethylene (Polytetrafluoroethylene), the English abbreviation is PTFE, (commonly known as "Plastic King, Hara"), brand name Teflon, in China, due to the pronunciation, the trademark "Teflon" is also called "tiefeilong", etc., are all transliterations of "Teflon". The teflon machining products of this material are generally collectively referred to as "non-stick coating"; it is a synthetic polymer material that uses fluorine to replace all hydrogen atoms in polyethylene. This material is resistant to acids, alkalis, and various organic solvents, and is almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance, and its friction coefficient is very low, so it can be used as a way of lubrication, and it has also become an ideal coating for non-stick pots and water pipes.
14. Photosensitive resin
Photosensitive resin manufacturing process
3D printing
Characteristics and application of photosensitive resin
The material used for light curing rapid prototyping is liquid light curing resin, or liquid photosensitive resin, which is mainly composed of oligomer, photoinitiator, and diluent. In the past two years, photosensitive resins are being used in the emerging industry of 3D printing, and are favored and valued by the industry because of their excellent characteristics.
15. Polyurethane PU
PU manufacturing process
Prototype production and complex mold machining / injection
PU characteristics and applications
Polyurethane is a type of polymer whose main chain contains -NHCOO-repeating structural units. The English abbreviation PU includes rigid polyurethane plastics, soft polyurethane plastics, polyurethane elastomers and other forms, and is divided into two categories: thermoplastic and thermosetting. The raw materials are generally presented in a resin state.
16. Rubber
Rubber manufacturing process
Prototype production and complex mold machining / injection
Rubber characteristics and applications
Rubber: a highly elastic polymer material with reversible deformation. It is elastic at room temperature, can produce large deformation under a small external force, and can return to its original state after removing the external force. Rubber is a completely amorphous polymer, its glass transition temperature (T g) is low, and the molecular weight is often large, more than several hundred thousand.
17, PET
PET manufacturing process
CNC machining / prototype production / injection molding
PET characteristics and applications
Polyethylene terephthalate is the most important type of thermoplastic polyester, commonly known as polyester resin. It is prepared by the transesterification of dimethyl terephthalate and ethylene glycol or the esterification of terephthalic acid and ethylene glycol to synthesize bishydroxyethyl terephthalate and then polycondensation reaction. Together with PBT, they are collectively referred to as thermoplastic polyester, or saturated polyester. It has excellent physical and mechanical properties in a wide temperature range. The long-term use temperature can reach 120℃. The electrical insulation is excellent. Even at high temperature and high frequency, its electrical performance is still good, but the corona resistance is poor. Creep resistance, fatigue resistance, friction resistance and dimensional stability are all very good.
18. PBT
PBT manufacturing process
CNC machining / prototype production / injection molding
PBT characteristics and applications
Polybutylene terephthalate, the English name polybutylene terephthalate (PBT for short), belongs to the polyester series and is composed of 1.4-pbt butylene glycol (1.4-Butylene glycol) and terephthalic acid (PTA) or terephthalate A milky white translucent to opaque, crystalline thermoplastic polyester resin made by polycondensation of formate (DMT) and through a mixing process. Together with PET, they are collectively referred to as thermoplastic polyester, or saturated polyester. Household appliances (food machining blades, vacuum cleaner components, electric fans, hair dryer housings, coffee utensils, etc.), electrical components (switches, motor housings, fuse boxes, computer keyboard keys, etc.), automotive machining industry (radiator grilles) , Body panels, wheel covers, door and window parts, etc.).

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