Additive Manufacturing (AM), commonly known as 3D printing, integrates computer-aided design, material processing and forming technology, and based on digital model files. Through software and numerical control system, special metal materials, non-metallic materials and medical biological materials are accumulated layer by layer in accordance with extrusion, sintering, melting, light curing, spraying and other ways to produce solid objects. Manufacturing technology of products. Compared with the traditional processing mode of material removal-cutting and assembly, it is a “bottom-up” manufacturing method that accumulates materials from scratch. This makes it possible to manufacture complex structural parts that were constrained by traditional manufacturing methods but could not be realized in the past.
FDM 3D Printer
Melt deposition rapid prototyping, main materials ABS and PLA
The materials of FDM process are generally thermoplastic materials, such as wax, ABS, PC, nylon, etc., which are fed in the form of silk. The material is heated and melted in the nozzle. The nozzle moves along the cross-section and filling track of the part, extrudes the melted material, solidifies the material rapidly, and binds with the surrounding material. Each layer is stacked on the upper layer, which plays a role of positioning and supporting the current layer.
SLA 3D Printer
Light curing molding, main material photosensitive resin
UV curing is the first rapid prototyping technology. Its principle is based on the photopolymerization principle of liquid photosensitive resin. This kind of liquid material can be photopolymerized rapidly under certain wavelength (x = 325nm) and intensity (w = 30MW) of ultraviolet light, and the molecular weight of the material increases rapidly, so the material changes from liquid to solid.
At present, UV curing is the most researched method and the most mature one in technology. Generally, the thickness of the layer is 0.1 to 0.15mm, and the precision of the formed pa
3DP 3D Printer
Three dimensional powder bonding, main materials powder materials, such as ceramic powder, metal powder, plastic powder
3D printing (3DP) process was developed by emanual Sachs of Massachusetts Institute of technology. E.m.sachs applied for 3DP (three dimensional printing) patent in 1989, which is one of the core patents in the field of micro droplet spray forming of non forming materials. 3DP process is similar to SLS process, which is formed by powder materials, such as ceramic powder and metal powder
SLS 3D Printer
Selective laser sintering, main material powder material
Spread the material powder on the upper surface of the formed part and scrape it flat; scan the cross section of the part on the newly laid layer with a high-intensity CO2 laser; the material powder is sintered together under the high-intensity laser irradiation to obtain the cross section of the part and bond with the formed part below; when the cross section of a layer is sintered, lay a new layer of material powder and select the lower layer to be sintered Section.
DLP 3D Printer
DLP 3D printing technology can reach higher standards in model complexity and accuracy, main material Liquid resin
The working process of DLP 3D printer is to project and aggregate a whole layer. With the help of light, the whole layer is formed once, which can significantly improve the printing speed. In addition, the continuous application of high-precision, fast drying 3D printing new materials also makes the forming speed of DLP 3D printing step up.