Nansha 3D Printing Research Institute SLA technology made a new breakthrough

China's industrial printing technology in full swing, it is understood that at present throughout the country are constantly on the traditional 3D printing research, continuous breakthrough. Recently, we have seen the 3D printing industry in the speed, accuracy and shape size has been no small result, which indicates that China's 3D printing industry is step by step on the right track.

The reporter learned from Guangzhou Nansha 3D Printing Innovation Institute on the 30th that the new 3D printer developed by the institute for one year is being debugged and will be officially launched. It is understood that the print speed of the product will achieve several times the growth in the use of materials will also be greatly broadened, ceramic materials, metal filling materials can be applied to them, in the future can be applied to porcelain teeth printing and other fields.

On the morning of the 30th, when the reporter came to the Nansha 3D Printing Innovation Institute, Xu Shushu, the dean of the hospital, and the technical team were debugging the new machine. Xu Xiaoshu told reporters that this new type of 3D printer is actually a breakthrough in the traditional SLA (ie laser rapid prototyping technology, a branch of 3D printing technology) and innovation in printers.

3D printing, its essence for the additive manufacturing. The working principle of the SLA is to use laser technology to cure the material such as photosensitive resin layer by layer. After each layer is cured in the trough, the worktable is lowered by the height of one sheet, and the cured resin sheet is coated Layer of new liquid resin to cover for the second layer of laser scanning and curing, a layer of new curing firmly bonded to the previous layer, so endless until the entire product is molded.

According to reports, the traditional SLA printer there are three main problems. First of all, high material flow requirements, can only be made of more dilute materials, such as resins, plastics, etc., had to give up high viscosity materials. Second, the workpiece needs to be scraped with a scraper after forming. In this process, there will be shear force on the workpiece. Therefore, a strong and accurate support structure must be designed to fix the product. However, the finished product will have to be removed after printing the support structure , Such as causing spots, etc., and to support the product after the completion of the complex process, while wasting material, the cost has also increased. Third, slow molding is another bottleneck for SLA printers. The paving process takes a long time, each laying a layer takes more than 10 seconds, and a workpiece often involves tens of thousands of layers, more than up to 100,000 layers, takes a very long time.

Xu Xiaoshu said that the institute is debugging the extrusion of 3D printers will crack the current problems. A major breakthrough in extrusion is the use of a wider range of materials. The use of high-pressure jet technology materials, the available material viscosity increased 5-6 times, the application of materials to expand the scope of production of ceramics, biomaterials, metal filling and other types of products.

Due to the increased viscosity of the material used, the material is discharged out of contact with the forming process and there is no contact, reducing the need for support. The support structure is reduced to 10% to 20% of the original, reducing costs, which is the second advantage of extrusion.

In the material ply time also has a big breakthrough, extrusion molding, material paving time of only about 1 second, equivalent to the original 1/10. Shop materials occupy 50% of the 3D printing process, so the entire print speed has also doubled.

Xu Xiaoshu said the printer can produce the surface of the product size 800 × 400mm, while the production of high precision products, product details can be done better, the future can use ceramic, bio-material or metal-filled materials to print porcelain teeth or Metal cutlery. To porcelain teeth, for example, traditionally need to skilled workers in the grinder on the cutting material, washing, long time, the loss of the tool, the high artificial requirements. The use of extrusion technology can be fully automated production, the cost will be greatly reduced.