What is the principle of SLA process for 3D printing equipment?

- Jun 05, 2019-

The idea of 3D printing originated in the United States at the end of the 19th century and was developed and promoted in the 1980s. 3D printing is one of the latest high "dimensions" in the technology fusion model. It is called "the thought of the last century, the technology of the last century, the market of this century." By the late 1980s, American scientists invented a printer that could print out three-dimensional effects and successfully brought the device to market, marking the development of 3D printing technology and its widespread application. And the world's first 3D printing device is the SLA process equipment, so what is her process principle?


First, the overall principle of additive manufacturing:

Suppose now that there are a bunch of 1cm*1cm*1cm blocks, and they are required to form a 4cm*4cm*4cm cube. First, put the first layer on the desktop, then put the second layer on the first layer, and so on. The layer, the fourth layer, just form a cube, which is the basic idea of 3D printing additive manufacturing. The three-dimensional drawing of the finished product is piled up by raw materials, and finally any shape required for integral molding, even irregular, complicated, hollow, hollow, Multi-layer seals and other structures can also be molded directly.


Among the current rapid prototyping equipment, the research of SLA is the most in-depth and the most widely used. Today, Cloud Cast 3D gives us a detailed explanation of its current process principles.


Second, SLA light curing molding process 3D printing equipment principle

SLA (Stereo lithography Appearance), that is, stereo photocuring molding. Also known as stereolithography, light shaping, etc., is a rapid prototyping process that uses a laser beam to scan a liquid photosensitive resin point by point to cure it.


Scanning the laser beam onto the surface of the resin with a scanning head, exposing it, and curing the portion of the liquid resin that is illuminated by the laser, starting to form the first layer of the shape, and then using the same method, on the layer Radiation, fixed-line, and so on, of a cross-sectional profile, so that the cross-sectional profiles of one layer are gradually stacked together to form a finished product.


Third, the application of SLA light curing molding

In the aerospace industry, SLA is mainly used for multiple parts investment casting, sample testing, and assembly testing. In the locomotive field, prototypes of shapes and structures are not required to be opened and quickly. At the same time, it can also be used for running tests and research of engines; in the field of mold casting, it is directly used for mold production; in the field of biomedicine, prosthesis production, complex surgical planning, oral and maxillofacial repair, etc. all require SLA. In the field of design and cultural creation, SLA can reproduce the designer's ideas and ideas well, breaking the barrier between traditional manufacturing process and design concept; various models of creative, sculpture and culture in animation and video games. Products and so on can be directly reflected in the SLA.