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FAQ
A: Because
the performance of plastic is different from that of metal and wood, the
thermal conductivity of plastic is poor, the coefficient of thermal expansion,
and the modulus of elasticity are low. When the jig or tool is deformed too
much, it is easy to cause deformation. When cutting, it is easy to melt due to
heat and easy to wear on the tool . Therefore, when machining plastics, the
tools used and the corresponding cutting speeds must be adapted to the
characteristics of the plastics. Therefore, plastics can also be cut, drilled
and welded with lasers.
Q: What is CNC plastic?
A: Plastic
is a synthetic polymer material. It has many excellent properties such as
corrosion resistance, high strength / weight ratio, convenient and fast
forming, rich colors and excellent electrical insulation. It has been used in
various industrial sectors. The production of plastic parts usually uses a mold
forming process. However, small batches of plastic parts still need to be
completed by CNC processing, that is, computerized digital control of precision
mechanical processing, CNC machining lathes, CNC machining milling machines,
CNC machining boring and milling machines, etc.
Q:What is the best plastic for machining？
A：1.ABS:
ABS resin is one of the five synthetic resins. It has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties. It also has the characteristics of easy processing, stable product size, and good surface gloss. It is easy to paint. , Coloring, can also be surface sprayed metal, electroplating, welding, hot pressing and bonding and other secondary processing, widely used in machinery, automobiles, electronic appliances, instrumentation, textile and construction and other industrial fields, is a very useful Wide range of thermoplastic engineering plastics. ABS is usually light yellow or milky white granular non-crystalline resin. ABS is one of the most widely used engineering plastics.
2: Nylon:
The Nylon has the most superior comprehensive properties, including mechanical strength, stiffness, toughness, mechanical shock absorption and wear resistance. These characteristics, combined with good electrical insulation and chemical resistance, make nylon a "universal grade" material for the manufacture of mechanical structural parts and maintainable parts.
3.PVC:
English abbreviation PVC (Polyvinyl chloride), is a vinyl chloride monomer (vinyl chloride monomer, abbreviated as VCM) in peroxide, azo compounds and other initiators; or under the action of light and heat polymerized by free radical polymerization mechanism polymer. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. PVC used to be the largest general-purpose plastic in the world, and it is widely used. It is widely used in construction materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foam materials, sealing materials, fibers, etc.
4.Bakelite：
Bakelite has high mechanical strength, good insulation, heat resistance and corrosion resistance, so it is commonly used in the manufacture of electrical materials such as switches, lamp holders, headphones, telephone cases, instrument cases, etc.
5.Acrylic（PMMA）
The chemical name of this transparent polymer material is polymethyl methacrylate, which is a polymer compound polymerized by methyl methacrylate. It is an important thermoplastic developed earlier. Plexiglass is divided into colorless transparent, colored transparent, pearlescent, embossed organic glass. Plexiglass is commonly known as acrylic, mid-range acrylic, and acrylic. Plexiglass has the advantages of good transparency, chemical stability, mechanical properties and weather resistance, easy dyeing, easy processing, and beautiful appearance. Plexiglass is also called gelatin glass, acrylic, etc. The material is widely used in the production of advertising light boxes and nameplates.
6. Polycarbonate (PC)
PC is a linear carbonic acid polyester. The carbonic acid groups in the molecule are alternately arranged with other groups. These groups can be aromatic, aliphatic, or both. Bisphenol A PC is the most important industrial product. PC is an almost colorless glassy amorphous polymer with good optical properties.
The three major application areas of PC engineering plastics are glass assembly industry, automobile industry and electronics and electrical industry, by industrial machinery parts, optical discs, packaging, computers and other office equipment, medical and health care, films, leisure and protective equipment. PC can be used as door and window glass. PC laminates are widely used in protective windows in banks, embassies, detention centers and public places, as well as aircraft cabin covers, lighting equipment, industrial safety baffles and bulletproof glass.
7. Polyoxymethylene (POM)
Polyoxymethylene is a thermoplastic engineering plastic with excellent performance developed after nylon. It is a linear polymer with high density and high crystallinity without side chains. Its performance is no less than nylon, but its price is lower than nylon.
The appearance of polyoxymethylene is light yellow or white, hard and slippery, and the thin-walled part is translucent; it has good tensile and compressive properties and outstanding fatigue resistance; it is generally insoluble in organic solvents at room temperature, and is resistant to aldehydes, esters, ethers, hydrocarbons and Weak acid, weak alkali, but not resistant to strong acid; resistance to gasoline and lubricating oil is also very good; has good electrical insulation properties. Polyoxymethylene has low water absorption, stable dimensions, good anti-friction, wear resistance, torsion resistance, and outstanding resilience. The melting point of polyoxymethylene is 153-160°C. The disadvantages are large molding shrinkage, poor stability at molding temperature, and narrow processing temperature range. Therefore, the molding temperature must be strictly controlled to avoid decomposition due to excessive temperature or long-term heating at the allowable temperature.
Polyoxymethylene is particularly suitable for making bearings, cams, rollers, rollers, gears and other wear-resistant and transmission parts. It can also be used to manufacture automobile dashboards, vaporizers, various instrument shells, covers, boxes, chemical containers, pump impellers, Blower blades, switchboards, coil seats, various oil pipes, plastic springs, etc.
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