Platform assembly, digital light processing (DLP) 3D printer and demoulding method

Abstract

The invention provides a platform assembly facilitating demoulding between a printed object layer and the bottom face of a photosensitive resin tank, a digital light processing (DLP) 3D printer using the platform assembly and a demoulding method using the platform assembly. The platform assembly comprises a supporting board unit moving up and down in the vertical direction and a printing platform used for bearing a printed object; the printing platform is movably connected with the supporting board unit, so that the printing platform inclines during demoulding and resets to the horizontal position after demoulding. Through the relatively rotary connection platform assembly, during demoulding, separation between the printing platform and the bottom face of the photosensitive resin tank can be achieved smoothly under the action of small force, flatness of the printed object is ensured effectively, deflection is prevented, and the printing precision is ensured. The DLP 3D printer uses the movably connected printing platform assembly, the structure is simple, and the cost is effectively reduced while the object forming effect is ensured.

Description

technical field [0001] The invention relates to the field of three-dimensional printing, in particular to a platform component of a three-dimensional printer for digital light processing, a printer and a demoulding method using the platform component. Background technique [0002] The working principle of the digital light processing (DLP) light-curing 3D printer is to use DLP technology, the light source is imaged by a projector, and the light source solidifies the liquid photosensitive resin layer by layer, and prints out a 3D object with a higher resolution than typical fusion deposition. Manufacturing (FDM) type 3D printers. [0003] DLP light curing 3D printer mainly consists of two parts: software and hardware. The hardware includes the printer frame, projector light source, print platform, and photoresin tank. The printing platform can move up and down in the photosensitive resin tank, and the photosensitive resin tank is filled with photosensitive resin. After dig...

AI Technical Summary

Problems solved by technology

After printing a layer, since the printed object layer is still in the liquid photosensitive resin, when the printing platform moves upward, a vacuum will be formed between the printed object layer and the bottom surface of the photosensitive resin tank, and the printing platform needs to overcome the hydraulic pressure on the printed object layer. Due to the common force of atmospheric pressure, the printed object layer is rigidly separated from the bottom surface of the photosensitive resin tank, which will affect the demoulding effect of the printed object layer. Since the DLP3D printer constructs the object by layer-by-layer printing, each printed object layer is It needs to be demolded with the bottom surface of the photosensitive resin tank, so it will seriously affect the final molding effect of the object, and it will also affect the overall service life of the printer

[0005] As a te

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