Fashionable 3D printing technology With the development of technology and equipment upgrades, any material can be 3D printed. Today we are going to talk about light curing 3D printing. Light-curing 3D printing is a high-speed, high-precision 3D printing technology. Use UV lasers and liquid UV-curable photopolymers-"photosensitive resins" to print parts. The laser beam is controlled to scan on the resin surface to solidify the resin surface to form a scanned part cross-sectional layer film. After curing a layer, cover the newly formed layer with a layer of liquid resin and continue scanning to solidify and combine it on the cross-section of the part formed by the previous curing. So reciprocating and growing layer by layer, so as to print a complete three-dimensional part.
SLA photosensitive resin 3D printing is currently the most popular 3D printing technology for industrial use, and it is widely used in many fields such as prototypes, prototypes, medical guides, and art. The products made by 3D printing have smooth surface, high precision and excellent display effect. Let's take a look at the samples printed by our Zhongrui Technology! Large-size Chinese dragon, complex and high-precision aerospace engine, mini cute cartoon figure, conceptual design for commercial display, etc.
Light curing materials
One generation of materials, one generation of equipment, the quality and accuracy of things made of different materials are different, and their uses are also different. The material for light-curing 3D printing is a photosensitive polymer material, which refers to a type of functional polymer material that can produce chemical and physical changes within or between molecules after absorbing light energy. Under the irradiation of a certain wavelength of ultraviolet light (250300 nm), the polymerization reaction is caused immediately, and the curing is completed. It is a special resin with many advantages. It is developed on the basis of UV coating formula. After curing, it has the properties of engineering plastics. Therefore, its properties are different from general photosensitive resins. Generally, it should meet the following requirements :
First. Material performance
1. Fast curing speed, small curing shrinkage
2. High degree of one-time curing
3. Low viscosity
4. The cured product has good mechanical properties
5. The cured product swells little
6. Good solvent resistance
7. Appropriate transmission depth
8. Good storage stability
9. Low toxicity
Second, Material classification
According to the reaction mechanism of the light-curing resin participating in the light-curing crosslinking process, the light-curing resin can be divided into:
(1) Radical light-curable resin (this is the first type of material we used)
(2) Cationic light-curing resin (high cost, good performance)
(3) Hybrid light-curing resin (Future trend)