High-precision 3D printing device based on sla technology

Abstract

The invention discloses a high-precision 3D printing device based on SLA technology, which includes a machine platform, a light-curing working cylinder groove arranged on the machine platform, a laser scanning head mechanism and a PLC controller; the inner wall of the light-curing working cylinder groove At least one photosensitive resin injection port is provided on the same level, and the photosensitive resin injection port is connected to the photosensitive resin storage container through the photosensitive resin injection pump through the pipeline; The position is also provided with at least one supporting medium injection port, which is connected to the supporting medium storage container through the supporting medium liquid injection pump through the pipeline, and the photosensitive resin liquid injection pump and the supporting medium liquid injection pump are connected with the PLC controller electrical connection; and the photosensitive resin floats on the surface of the supporting medium, while the high polymer formed after the photosensitive resin is cured sinks in the supporting medium. The printing accuracy of the invention is high, the trace transition of the printing arc surface is smooth, the photosensitive resin is completely cured, and the cured bonding force between layers is high.

Description

technical field [0001] The invention relates to a high-precision 3D printing device based on SLA technology. Background technique [0002] SLA technology is also called photocuring rapid prototyping technology. Its principle is that the computer controls the laser beam to scan the surface of the photosensitive resin point by point, and the thin layer of resin (about a few tenths of a millimeter) in the scanned area is cured by photopolymerization. Form a thin layer of product. The workbench is moved down by a layer thickness, so that a new layer of liquid resin is applied on the surface of the cured resin, and the scanning process of the next layer is carried out, and so on, until the entire product prototype is manufactured. [0003] Since the photopolymerization reaction is based on light rather than heat, 3D printing devices based on SLA technology only need a lower power laser source when working. In addition, because there is no thermal diffusion, and the chain reacti...

AI Technical Summary

Problems solved by technology

[0005]1. 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 high-intensity laser is used to carry out 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

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