3D (three-dimensional) printing method and printing system based on holographic projection

Abstract

The invention discloses a 3D (three-dimensional) printing method and printing system based on holographic projection. The 3D printing method comprises the following steps of pre-manufacturing a holographic plate with a holographic map of a to-be-printed object; enabling coherent light emitted by a coherent light source to pass through the holographic plate along a preset holographic projection imaging light path, and forming a three-dimensional stereo actual image corresponding to the to-be-printed object in a preset projection space; polymerizing and curing a photosensitive material in the projection space at one time by the three-dimensional stereo actual image, and forming a three-dimensional object of which the actual size and shape are uniform with the size and shape of the three-dimensional stereo actual image. The 3D printing method has the advantage that by arranging the photosensitive material matched with the light intensity distribution of the three-dimensional stereo actualimage in the projection space, the one-time omni-directional stereo polymerizing is realized, so that the forming process of the samples with complicated structure can be completed at one time, the gradual continuous accumulating and forming process of points, lines, surfaces and body is not needed, the forming time is greatly shortened, and the working efficiency and forming precision are improved.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a 3D printing method and system based on holographic projection. Background technique [0002] 3D printing is a common name for additive manufacturing. Its core is the combination of digital, intelligent manufacturing and material science. It is the opposite of the traditional subtractive manufacturing method of machining and cutting raw materials. [0003] Now there are different methods of 3D printing technology on the market, the common ones are: FDM (fused deposition), SLA (light curing), SLS (selective laser sintering), DLP (digital light processing), etc. The process is only a way of cumulative printing step by step, that is, it is necessary to layer the print sample data, then start printing from points, to lines, to surfaces, and finally superimpose layers on three-dimensional entities (DLP is directly from surface to body. printing process). This will re...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a 3D printing method and system based on holographic projection in view of the above-mentioned defects of the prior art, aiming to solve the processing problems brought about by the traditional additive manufacturing method of gradually accumulating printing in the prior art. Low efficiency, long processing time and other shortcomings, while overcoming the shortcomings of the existing one-time 3D molding technology that cannot make complex structures, poor molding effect and precision

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