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Mechanism and important features of SLA light curing molding

by:Tuowei     2019-09-29
2017-09- 04 11: 38

SLA light curing molding process, also known as stereo lithographic molding, is a kind of rapid prototyping process, referred to as SL, and sometimes referred to as SLA. The process is a RP Process developed successfully in 1986 in the United States. It was patented in the United States in 1987 and is an early rapid prototype technology with mature technology and wide application. It uses photo-sensitive resin as raw material, and controls the layer-by-layer solidification of UV laser stone tools by computer. This method can make a prototype with high surface quality and dimensional accuracy and complex geometry simply and fully automatic. Prototype model of laser curing (SLA) Forming Mechanism: in order to achieve rapid prototyping of light curing, the choice of photosensitive resin is also very important. It must have a suitable viscosity, reach a certain strength after curing, and have smaller shrinkage and distortion after curing and curing. More importantly, in order to make a part at high speed and precision, the photosensitive resin must have a suitable photosensitive performance, not only to cure under low light energy, and the curing depth of the resin should also be appropriate. Under the control of the computer, the UV laser scans the surface of the liquid photosensitive resin point by point according to the data of each layered section of the part, so that the thin layer of the resin in the scanned area produces light polymerization reaction and curing, forming a thin layer of parts; After one layer is cured, the Workbench drops, and a new liquid resin is applied to the surface of the originally cured resin for the next layer of scanning and curing; The newly cured layer is firmly bonded to the previous layer; This is repeated until the whole zero original type is finished. The SLA method is characterized by high precision, good surface quality and nearly 99 utilization of raw materials. 9%, can shape parts with particularly complex shapes, especially fine. The downside is that the equipment is relatively expensive.

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