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The differences between SLA, DLP, LCD, and CLIP technologies.

2023-07-07 15:36

SLA, the oldest and most mature photocuring technology, benefited from the development of laser technology in the last century. The first thing that 3D printing developers thought of was to use laser to achieve 3D printing. Unlike other technologies, it uses a laser generator and a galvanometer to complete the scanning forming of point light sources, which is line shaped rather than surface shaped. In the printing direction, it is upward, so it can print very large or a large number of models;

DLP and LCD have many commonalities, both of which are surface molding and downward printing. The main difference lies in the molding light source. DLP uses a digital projector to project light sources of each shape onto the release film, while LCD uses ultraviolet lamps to emit light sources, which are then "cropped" out of each shape on the LCD screen. The former has a high level of digital projector technology, which is a technology inspired by 3D printing. The latter has a wide range of LCD applications, and can be used on 3D printers by converting to ordinary LCD screens on the market.


CLIP also has many similarities with the previous two, and in terms of technology, it has more advantages. After the formation of DLP and LCD, there is still a need to move up and down, which is a model composed of layers, while CLIP is continuously pulled up and formed. This technology is achieved by creating an oxygen dead zone between the light source and the resin, which is technically complex and difficult. But its molding effect is obvious, and the printing speed is much faster than DLP and LCD. We have tried manufacturing technology validation machines after understanding this technology, and the actual measurement results show that it can shape a height of 6mm per minute, which is 6 times the speed of LCD black and white machines. Of course, due to the patent application for this technology, most people may not be able to enjoy it in the short term.