Photocuring 3D printing device

Abstract

The invention discloses a photocuring 3D printing device. The 3D printing device comprises a material tray, a forming platform, a lifting mechanism, a light source device, a material box and a material mixing device. The material tray is used for bearing photosensitive resins. The forming platform is provided with a forming end face used for bearing a 3D printing product. The lifting mechanism isused for driving the forming platform to move. The projection direction of light emitted by the light source device is right opposite to the forming end face. The material box is filled with differentphotosensitive resins. The material mixing device is connected with the material box. The material mixing device is provided with a feeding pipe communicated with the material tray. The photosensitive resins in the material box can be mixed in the material mixing device to form mixed resins with specific colors and / or specific mechanical properties and / or specific solubilities. According to the technical scheme, a color printing effect can be achieved, or different positions of the printed product have different mechanical properties or solubilities, and the structure is simple.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a photocuring 3D printing device. Background technique [0002] 3D color printing is one of the development directions in the field of 3D printing. In the current 3D printing industry, although Three Dimensional Printing and Gluing (3DP) can achieve color printing, it uses powder materials to form - the powder used is passed through the nozzle with the aid of an adhesive (such as silica gel), "Print" the cross-section of the part on top of the material powder. However, parts bonded with adhesives are weak, require post-processing, and have rough molding surfaces. [0003] Different from three-dimensional spraying and bonding molding technology, Stereo Lithography Appearance (SLA) printers have faster printing speed and high molding accuracy, and the printed products can match injection molding in terms of material properties, details and surface finish. Molded d...

AI Technical Summary

Problems solved by technology

Specifically, the technical scheme uses a nozzle to spray photosensitive resin, and at the same time uses ultraviolet point light source to irradiate the photosensitive resin material to a semi-cured state, and then further cures the photosensitive resin material through the DLP projection system. Time; the nozzle-type printing method usually needs to be equipped with a complex moving mechanism to form large-format products; due to the need to change the resin color frequently, pollution problems will inevitably occur in the forming working pool (that is, the material tray); frequent Moving the nozzle and changing the position of the forming platform is not only complicated to operate, but also affects the position accuracy

[0007] In addition to the requirement of color printing, sometimes it is required that different positions of the printed product have different mechanical properties or solubility, but the above requirements cannot be effectively met by using the light-curing 3D printing process

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