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3D printing technology

3D printing technology is a kind of rapid prototyping technology, which is based on mathematical model files and uses adhesive materials such as powdered metal or plastic to construct objects through layer by layer printing. Often used in mold manufacturing, industrial design, and other fields to manufacture models, and later gradually used in the direct manufacturing of some products, there are already components printed using this technology.
This technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, medical industry, education, geographic information systems, civil engineering, firearms, and other fields。

Principle:

The DLP device includes a liquid tank that can accommodate resin, used to hold resin that can be cured after being irradiated by ultraviolet light of a specific wavelength. The DLP imaging system is placed below the liquid tank, with its imaging surface located just at the bottom of the liquid tank. Through energy and graphic control, a thin layer of resin with a certain thickness and shape can be cured each time (this layer of resin is identical to the cross-sectional shape obtained by previous segmentation). A lifting mechanism is arranged above the liquid tank, and after each section exposure is completed, a certain height is pulled upward (the height is consistent with the layer thickness), so that the currently solidified solid resin is separated from the bottom surface of the liquid tank and bonded to the lifting plate or the last formed resin layer. In this way, three-dimensional solids are generated through layer by layer exposure and lifting.