3D printing is becoming more and more popular. Most light-curing 3D printing only knows the SLA molding method, which can cost tens of thousands of dollars. When you hear the name, you will think of the meaning of light solidification. (David Asher, Northern Exposure (American TV series)) Most of the consumables used in engineering are photosensitive resins, which are mixtures of photoinitiators, monomer polymers, and prepolymers. They can be cured under the focus of ultraviolet light of a specific wavelength.

Currently, SLA, DLP, and LCD models usually use photosensitive resin materials. Models printed with photosensitive resin materials have smoother surfaces, higher printing accuracy, and higher molding quality. Next, I will explain photocuring in detail. The difference between SLA, DLP, and LCD.

The oldest entrepreneur is interested in using ordinary computer LCD monitors to remove the backlight, using 405 LED beads to make the backlight, and printing UV resin.

LCD. What is it?

LCD is the abbreviation of liquid crystal display. As the name suggests, it is an LCD projector that uses lens magnification and mirrors to transmit the light source of the LCD panel. It is a metal halide lamp or UHP (cold light source).

What is DLP?

DLP is the abbreviation of "digital light processing", that is, digital light processing. The image signal is digitally processed and then light is projected. The principle is that the cold light emitted by the UHP bulb illuminates the light evenly through the condenser lens and Rod, and the processed light is divided into three colors: RGB (or RGBW, etc.) and passes through the color wheel. Projected from the lens onto the DMD chip.

What is SLA?

SLA is the abbreviation of "Stereolithography". The laser beam draws a layer of object shape on the surface of the liquid photosensitive resin, and then makes a platform to drop it a certain distance, immerse the solid layer in the liquid resin, and print repeatedly until it is formed. Finally, the prototype is removed from the resin, hardened, and then illuminated, electroplated, painted, or colored to obtain the desired product. In addition to stereolithography and light sources, there are many software, automation, application and industrial ancillary issues. Another core issue is light-curing resin, which is also the core technology. Based on the principles and materials of light-curing rapid prototyping, Anycubic light-curing 3D printing rapid prototyping has the following characteristics:

Advantages of LCD:

1. High precision: plane precision Easily reaching 100 microns, it is superior to first-generation SLA technology and rivals current desktop DLP technology.

2. Low price: Compared with the previous generation technologies of SLA and DLP, the price/performance ratio is very high. Simple structure: Since there is no laser reflector or projector, the structure is simple and easy to assemble and maintain.

3. Universal resin: uses 405 nm backlight, so theoretically all DLP resins or most light-curing resins are compatible. Just note that SLA-specific resin may not have good compatibility, mainly due to lack of exposure.

4. Fast printing speed: printing multiple parts at the same time will not reduce the speed. This is because, like DLP technology, it is a surface-shaped light source.

Small in size, light in weight and easy to carry, it is a mainstream product in the projector market, so it is popular in home entertainment and small shopping malls at a lower price.

Advantages of DLP projectors:

1. From a technical point of view, DLP projectors have three main characteristics: basic contrast, machine miniaturization and closed light path

< p>2. The DMD chip adopts mechanical operation mode, which can better control the movement of the lens. The basic contrast is high and predictable.

3.DLP projectors adopt the reflective principle, which is more considerate and protects the eyes.

4. The DMD chip uses a semiconductor structure, and the lens working at high temperatures will not change much. Therefore, the DLP projector uses a closed optical path to reduce the probability of dust entering.

Benefits of dealing with service level agreements:

1. High machining accuracy, 0.1 mm; accessible;

2. Can manufacture parts with complex shapes (such as Empty parts), especially fine parts (such as accessories, handicrafts, etc.). ), suitable for mobile phones, radios, walkie-talkies, mice and other fine parts and toys, high-tech electronic industrial casings, home appliance casings or models, motorcycles, auto parts or models, medical equipment, etc.

3. The processing speed is fast, and layered scanning of 0.1-0.15mm can be completed;

4. The surface quality is good, and thin-walled structures with fine details can be produced to facilitate post-processing.

5. The processing site can handle many details that CNC hands cannot handle, reducing the workload of post-processing. .