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3D Printing

May 31, 2019

3D printing, also known as additive manufacturing (AM) or rapid prototyping (RP), is a technique for constructing solids by layer-by-layer curing of powder or liquid-like fusible materials based on digital model files. . The production speed is fast, and it is not limited by the complexity of the connection structure. Personalized manufacturing is its characteristic.

A 3D printer is the device that implements this process. Due to the difference in printing technology and printing materials, 3D printers have different printing principles, sample functions, and uses. The printed products are mostly used for prototyping, verification, and iterative design. They can also be used for printing casting molds or for direct manufacturing. Pieces. 3D printing technology has applications in many fields such as automotive, aerospace, medical, mold, manufacturing, construction, and entertainment.

3D printing process

SLA is a stereo photocuring method. Focusing on the surface of the photocurable material with a laser of a specific wavelength and intensity, from point to line, from line to surface solidification, complete a level of drawing operation, then move the lifting table vertically in the height of a layer, and then solidify Another level. Such layer stacking constitutes a three-dimensional entity.

Digital Light Processing (DLP) technology was first developed by Texas Instruments to create a 3D printed object by solidifying the photopolymer liquid layer by layer with a projector. Due to its rapid projection of UV light, it has become a new rapid prototyping technology.

The SLS process, also known as selective laser sintering, transforms the powder into a tightly bonded whole by sintering, rather than melting it into a liquid state, which is covered by a layer of coating under laser scanning, and finally the part is sunk into a pile of powder. In the middle, it is then cooled by a cooling time of 12-14 hours, and the remaining powder can be recycled for reuse.