A scraper voltage stabilizing system and its control method

Abstract

The scraper voltage stabilizing system provided by the present invention includes a scraper and a vacuum box for adjusting the air pressure in the inner cavity of the scraper, a first electromagnetic valve, a second electromagnetic valve, a vacuum pump and a central controller, wherein the central controller is connected with the inner cavity of the scraper respectively. connected to the pressure sensor, the first solenoid valve and the second solenoid valve, which includes a data processing module and a sending instruction module, and can control the first solenoid valve and the second solenoid valve according to the air pressure value measured by the pressure sensor. The solenoid valve is adjusted to control the air pressure in the inner cavity of the scraper to maintain a stable value. The present invention maintains the constant pressure of the inner chamber of the scraper through the above-mentioned closed-loop voltage stabilization control, further realizes the stability of the resin liquid level in the inner chamber of the scraper and the effective removal of air bubbles, and guarantees the laser light curing molding printer using the doctor blade voltage stabilization system The printing success rate and the quality of the printed workpiece during printing.

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...

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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

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