Forming method

A molding method and model technology, applied in the field of additive manufacturing, can solve the problems of complex post-processing procedures, high technical requirements, complex structure, etc., and achieve the effects of avoiding deterioration and failure, simplifying equipment and high molding accuracy

Inactive Publication Date: 2016-11-16
唐天
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the three-dimensional printing methods of DLP and SLA have high technical requirements, expensive equipment, complex structure, and poor stability
In addition, the model printed by the above technology requires complex post-processing procedures, including cleaning the surface with chemical solvents, sending it into a UV curing box for long-term exposure and post-curing treatment, etc.

Method used

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Experimental program
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Effect test

Embodiment 1

[0054] like figure 1 As shown, the visible light digital image output device 3 is preferably a 7-inch LCD liquid crystal screen, TFT type, the display area size is 142x107mm, and the brightness is 1000cd / m 2 , a contrast ratio of 800:1, a resolution of 800x600, and a pixel size of 0.18x0.18mm. The two-dimensional cross-sectional visible light image 7 is a white / blue / cyan pattern in the visible light range output by the visible light digital image output device 3 , which is a mirror image of the two-dimensional cross-sectional view of the corresponding layer thickness. The resin tank 2 is filled with a visible light-curable resin, and its bottom wall is a light-transmitting film, and the light-transmitting film is close to the surface of the visible light digital image output device 3 . Model platform 5 is connected with drive assembly 1 that contains stepper motor / slider / guide rail, and the total stroke of drive assembly 1 is 200mm, and each step height is preferably 0.10mm. ...

Embodiment 2

[0058] like figure 2 As shown, the visible light digital image output device 3 is preferably a 42-inch LCD liquid crystal screen, the display area size is 930x522mm, and the brightness is 800cd / m 2 , a contrast ratio of 1200:1, a resolution of 3840x2160, and a pixel size of 0.24x0.24mm. The two-dimensional cross-sectional visible light image 7 is the white / blue / cyan pattern array output by the liquid crystal screen, which is the mirror image of the two-dimensional cross-sectional view of the corresponding layer thickness. like figure 2 As shown, if the size of the preset three-dimensional model is small, two to hundreds of copies of the same model or combinations of different models can be arranged within the display range of the visible light digital image output device 3 , and they are uniformly arranged in an array. The resin tank 2 is filled with a visible light-curable resin, and its bottom wall is a light-transmitting film, and the light-transmitting film is close to...

Embodiment 3

[0062] like image 3 As shown, the visible light digital image output device 3 is preferably a high-definition high-brightness projector and its accompanying optical lens group, the projection distance is 250mm, the projection area size is 192x108mm, the brightness of the projector is 10000 ANSI lumens, the contrast ratio is 1000:1, and the resolution is 3840x2160 with a pixel size of 0.05x0.05mm. The two-dimensional cross-sectional visible light image 7 is the white / blue / cyan pattern array output by the liquid crystal screen, which is the mirror image of the two-dimensional cross-sectional view of the corresponding layer thickness. The resin tank 2 is filled with liquid visible light curable resin, and the depth of the visible light curable resin is greater than 150mm. The model platform 5 is suspended type, and the model platform 5 is immersed in the resin tank 2. The size of the platform is 160x130mm, the total stroke is 150mm, and the height of each step is preferably 0.0...

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Abstract

The invention discloses a forming method. Visible light is output through a visible light digital image output device, visible light curing resin serves a consumable, and layer-by-layer accumulation of visible light curing resin thin layers is controlled through a model platform which can finely move. In the forming process, the visible light digital image output device outputs a two-dimensional section image, and visible light signals within the image range simulate the liquid visible light curing resin thin layers to make the visible light curing resin thin layers generate a photochemical effect to be cured. New resin thin layers formed by longitudinal movement of a model are curved layer by layer by conducting the above curing process repeatedly and are accumulated to form a three-dimensional curving model. The forming method does not depend on an ultraviolet source system, the optional range of light source devices is wide, the system is stable and reliable, the device is precise, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a forming method. Background technique [0002] Additive manufacturing (also known as 3D printing) is a type of rapid prototyping technology. It is based on digital model files and uses powder, liquid glue or ink, wire and other materials to construct objects by layer-by-layer printing. It can overcome special structural obstacles that cannot be realized by traditional machining, and can realize rapid prototyping of components and production of components with arbitrary complex structures. The existing additive manufacturing technologies are mainly divided into three categories: FDM melt extrusion, light curing, and SLM / SLS laser selective powder sintering. [0003] Existing photocuring 3D printing technologies include SLA laser scanning photocuring and DLP digital micromirror projection photocuring technology. Wavelength 320nm-400nm) two types of light sources; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C67/00B33Y10/00B33Y30/00
CPCB29C67/00B33Y10/00B33Y30/00
Inventor 唐天
Owner 唐天
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