Scraper pressure stabilizing system and control method thereof

Abstract

The invention provides a scraper pressure stabilizing system. The scraper pressure stabilizing system comprises a scraper as well as a vacuum box for regulating gas pressure of an inner cavity of the scraper, a first solenoid valve, a second solenoid valve, a vacuum pump and a central controller, wherein the central controller is connected with a pressure sensor, the first solenoid valve and the second solenoid valve which are communicated with the inner cavity of the scraper respectively; the central controller comprises a data processing module and an instruction sending module, can be used for regulating the first solenoid valve and the second solenoid valve according to a gas pressure value measured by the pressure sensor to control the gas pressure in the inner cavity of the scraper to be kept at a stable value. Through the closed-loop stable control, the scraper pressure stabilizing system keeps the constant pressure of the inner cavity of the scraper, so that the stabilization of resin liquid level in the inner cavity of the scraper and effective removal of gas bubbles are realized, and the printing success rate during printing and the quality of the printed workpieces of a laser photocuring molding printer which adopts the scraper pressure stabilizing system are guaranteed.

Description

technical field [0001] The invention relates to a voltage stabilizing system, in particular to a scraper voltage stabilizing system applied to a laser photocuring printer and a control method thereof. Background technique [0002] The laser light curing printer is referred to as "SLA", which is a kind of printing equipment that adopts the principle of three-dimensional engraving and rapid prototyping. It is suitable for making small and medium-sized workpieces, and can directly obtain resin or similar engineering plastic products. [0003] Among them, the SLA process is a molding technology in which a photosensitive resin is irradiated with laser light and solidified in layers to make a 3D model. During the curing process, a device, that is, a scraper, is needed to ensure the stability of the printing liquid surface, remove air bubbles, and spread the material on the workpiece in time and evenly. Therefore, the scraper has an important impact on the SLA printing quality, an...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the scrapers in the prior art are vacuum adsorption scrapers. When the scraper blade moves on the printing liquid surface, the liquid resin is adsorbed into the inner cavity of the scraper. The internal liquid level is unstable, which will easily lead to unstable liquid level on the printing surface, and the air bubbles on the printing liquid surface cannot be removed, resulting in unstable printing workpiece size, or even printing failure

Images