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A light-curing 3D printing method that can automatically unsupport
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A 3D printing and light curing technology, applied in 3D object support structures, manufacturing tools, additive manufacturing, etc., can solve the problems of slow printing speed and high cost, and achieve the effect of low cost and simple process
Active Publication Date: 2021-09-28
ZHEJIANG UNIV
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However, the cost of polyjet technology is very high, and the printing speed is much slower than DLP
Method used
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[0048] Phenylthiophenyldiphenylsulfonium salt (365 initiator) 0.3g
[0049] Sudan III (ultraviolet blocking agent) 0.03g
[0050] The schematic diagram of the structure of the light-curing 3D printing device in the embodiment of the present invention is as follows: figure 1 shown.
[0051] The specific process flow is introduced below, including:
[0052] (1) configure the photosensitive resin in the foregoing embodiment;
[0053] (2) Slice the model and print it on the machine. When printing each slice layer, first expose the main part and the support part to a 405nm light source; then switch the light source to perform 365nm exposure on the main part. Repeat this until the model is printed;
[0054] (3) Put the printed model into water, stir, and the supporting part dissolves ...
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Abstract
The invention discloses a photocuring 3D printing method capable of automatically desupporting: during the printing process of each layer, the photosensitive resin is exposed to a 405nm light source to form a main part and a supporting part, and the main part is then exposed to a 365nm light source until the printing is completed; The supporting part is soaked in water, and the supporting part is hydrolyzed; the photosensitive resin includes acrylate and cationic curing monomer. The method uses a photosensitive resin and cooperates with two light sources of different wavelengths to realize the performance difference between the main part and the supporting part, so that the supporting part can be automatically removed through hydrolysis.
Description
technical field [0001] The invention relates to rapid prototyping technology, in particular to a light-curing 3D printing method capable of automatically unsupporting. Background technique [0002] 3D printing, also known as additive manufacturing, is a collective term for a series of rapid prototyping technologies. Its basic principle is based on digital model files, using metal, plastic, ceramics and other materials to construct three-dimensional structural objects by layer-by-layer stacking. [0003] 3D printing technologies using polymers as printing materials mainly include fused deposition modeling (FDM), selective laser sintering (SLS), multi-jet fusion molding (MJF), stereolithography (SLA), digital light processing (DLP) and multiple jetting. (Polyjet). Among them, the light-curing 3D printing technology represented by DLP, SLA and polyjet is widely used due to its high precision and printing speed. [0004] One of the pain points of light-curing 3D printing is t...
Claims
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Application Information
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