3d printing device and method using release film to push liquid horizontally to realize coating

Abstract

A 3D printing device includes a liquid bath configured to contain liquid resin and having a main area and an extending area; a printing platform configured to carry a printed sample and inserted into the main area; and a release film assembly including a release film and a release film driving unit for driving the release film to move horizontally between the main area and the extending area. The invention has the following beneficial effects: 1, various errors caused by use of a quick levelling component such as a hub are eliminated, thus improving the printing quality; 2, an accurate printing thickness can be obtained by horizontally pushing printing liquid once by the release film, thus improving the printing efficiency; and 3, when the printing platform is assembled or disassembled, the release film can move to the extending area and does not need to be disassembled, so operation is simplified.