JY Machinery provides CNC machining service,including CNC milling,CNC turning and CNC routing services for custom metal and plastic parts with precision tolerance,such as CNC aluminum parts,CNC machining steel parts,CNC machining stainless steel,CNC plastic machining,etc.
FAQ
Q: What is Acrylic (PMMA)?
A: Acrylic, also known as PMMA or plexiglass, is derived from the English acrylic (acrylic plastic), the transliteration is "acrylic" (so "acrylic" is a transliterated word), and the chemical name is polymethyl methacrylate.
Acrylic is a plastic polymer material with good transparency, chemical stability and weather resistance, easy to dye, easy to process, and beautiful in appearance. It is widely used in the construction industry. Plexiglass products can usually be divided into cast plates, extruded plates and molding compounds.
Q: Is Acrylic(PMMA) Plastic Good?
A: Yes, because:
1. It has crystal-like transparency, light transmittance above 92%, soft light, clear vision, and acrylic colored with dyes has a good color development effect.
2. Acrylic sheet has excellent weather resistance, high surface hardness and surface gloss, and good high temperature performance.
3. Acrylic sheet has good processing performance, which can be processed by thermoforming or mechanical processing.
4. Transparent acrylic sheet has a light transmittance comparable to glass, but the density is only half that of glass. In addition, it is not as fragile as glass, and even if it is broken, it will not form sharp fragments like glass.
Q: Can you CNC plastic?
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:Can a CNC machine cut plastic?
A:1. CNC lathe for plastic:If the surface requirements of the workpiece are particularly high, the cutter head shall be designed as a wide head row. For ends used to cut profiles, design. It is in the shape of rhombic long edge to avoid excessive burr. When processing thin-walled and soft materials, it is best to use a knife head with the same structure as a knife.
2.Drilling Holes for plastic:Twist drills can be used, with a helix angle ranging from 12 to 16 degrees. To facilitate chip removal, the helix groove should be smooth. When the diameter of a hole is large, it is necessary to drill it step by step or use a hollow drill or cut it directly. When drilling solid materials, pay special attention to use a sharper drill bit, otherwise the increasing pressure during drilling may cause the parts to crack. Compared with the unreinforced materials, the reinforced plastics have higher internal stress and lower impact strength in the machining process, so they are easier to crack. Therefore, if possible, heat the profile to about 120 ° C before drilling the reinforcement material (heating time is 1 hour for every 10 mm thick part). We recommend heating nylon and polyester only when they are processed.
3.Tapping threads for plastic:It is better to use a thread cutter to process threads, and use a double tooth cutter to avoid flash. When tapping, the machining allowance shall be considered (the machining allowance depends on different materials and apertures, and the reference value is 0.1mm).
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