High-precision 3D printing device based on SLA technology

Abstract

The invention discloses a high-precision 3D printing device based on an SLA technology. The high-precision 3D printing device comprises a device table, a photocuring working barrel groove formed in the device table, a laser scanning head mechanism and a PLC. At least one photosensitive resin injection opening is formed in the portions, of the same horizontal height, of the inner side wall of the photocuring working barrel groove. The photosensitive resin injection openings are connected with a photosensitive resin storing container through pipelines and a photosensitive resin topping-up pump. At least one bearing medium injection opening is formed in the position, lower than the photosensitive resin injection openings, of the inner side wall of the barrel groove. The bearing medium injection openings are connected with a bearing medium storing container through pipelines and a bearing medium topping-up pump. The photosensitive resin topping-up pump and the bearing medium topping-up pump are electrically connected with the PLC. Photosensitive resin floats on the surface of a bearing medium, while high polymer formed after the photosensitive resin is cured is sunken into the bearing medium. The printing device is high in printing precision, transition of printing cambered surface trails is smooth, the photosensitive resin is cured completely, and curing bonding force among layers is large.

Description

Technical field [0001] The invention involves a high -precision 3D printing device based on SLA technology. Background technique [0002] SLA technology, also known as optical solidification and fast forming technology, is the principle of computer -controlled laser beams to scan the surface of light -sensitive resin as raw materials.A thin layer of the product.The workbench moves a thick layer of distance in order to solidify the surface of the resin and apply a new layer of liquid resin to the next layer of scanning and processing, so that the prototype of the entire product is completed. [0003] Since the optical aggregation reaction is based on the role of light and not the heat -based effect, 3D printing equipment based on SLA technology only requires low -power laser sources at work.In addition, because there is no thermal diffusion, and the chain reaction can well control the guarantee that the polymerization reaction does not occur outside the laser point, so the process...

AI Technical Summary

Problems solved by technology

[0005]1. The PLC drives and controls the lifting of the working platform to control the liquid level and layer thickness. Since it is a mechanical lifting mechanism, its precision cannot be very high, so it is difficult to print balls. The step mark is still relatively serious on the curved surface;

[0006]2. Because the photosensitive resin of the upper layer is mixed with the cured polymer surface of the lower layer, if a high-intensity laser is used to carry out the polymerization reaction, high temperature will be generated, and these high temperatures cannot be timely Dispersion will make the surface of the polymer rough, resulting in insufficient bonding between layers, which will affect the final quality of the product;

[0007]3. Due to the above 2 reasons, the current equipment uses low-intensity laser to carry out the polymerization reaction, and the curing is often incomplete during the printing process, which also affects the final quality of the product

Images