Membrane coating multi-material photocuring 3D printing equipment and use method thereof

A 3D printing and multi-material technology, applied in the field of 3D printing, can solve the problems of low precision, small format, and large manufacturing format, and achieve the effect of high precision and large format

Active Publication Date: 2020-05-19
BMF NANO MATERIAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Or, for example, while multi-material fabrication is possible using multiple nozzle direct writing 3D printing methods, a series of properties limit its speed, and the resolution is limited to about 100 microns due to nozzle fluid properties
[0007] The existing photo-curing 3D printing technology either has a large manufacturing format but low precision, or has a high manufacturing accuracy but a small format, or supports multiple materials but has a small manufacturing format, or manufactures a large format but only supports one material, etc. In short, Limited by the projection accuracy and format of the radiation source, the technology of multi-material feeding and material layering, and the technology of residual liquid cleaning of each material layer, it is impossible to have the functions of large manufacturing format, high manufacturing precision, and support for multiple materials at the same time. As a result, it is impossible to prepare multi-material, high-precision, and large-format samples. However, samples with these characteristics have a huge demand space in emerging research fields from bioengineering to heterogeneous engineering materials.

Method used

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  • Membrane coating multi-material photocuring 3D printing equipment and use method thereof
  • Membrane coating multi-material photocuring 3D printing equipment and use method thereof
  • Membrane coating multi-material photocuring 3D printing equipment and use method thereof

Examples

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Effect test

Embodiment 1

[0053] This embodiment provides a film-coated multi-material photocuring 3D printing device, such as figure 1 , 8 shown, including:

[0054] The optical system 1 is used to provide the radiation pattern of the cured printing liquid and monitor the projection accuracy;

[0055] printing platform 2, used to generate and carry objects to be printed;

[0056] The release film 3 is used to cooperate with the printing platform 2 to shape a layer thickness of the object to be printed;

[0057] Coating scraper 4 is used to evenly coat different types of printing liquid between the release film 3 and the object to be printed, and the coating scraper 4 has holes or gaps that can discharge printing liquid; the coating scraper 4. Upward and / or downward air knives are provided to blow off the residual printing liquid on the release film 3 or the printed object;

[0058] The liquid storage and delivery assembly, including a storage device 61 and a delivery device 62 of printing liquid, ...

Embodiment 2

[0082] This embodiment provides a film-coated multi-material photocuring 3D printing method, specifically a method for generating a three-dimensional object from a fluid medium:

[0083] As an exemplary embodiment, the system can adopt:

[0084] 1. In this exemplary embodiment, a photosensitive resin curable by ultraviolet light in the 405nm band is selected, and the resin material can be a particle suspension;

[0085] 2. In this exemplary embodiment, a light source with a uniform illumination field at a wavelength of 405 nm, a DLP panel with a native resolution of 1920X1080, each pixel size of the DLP panel is about 7.6 μm X 7.6 μm, using optical elements, Includes a beam splitter for the microdisplay, a CCD camera for monitoring, and a projection lens to project the microdisplay image onto the coated side of the transparent film. In this exemplary embodiment, the magnification of the projection lens here is about 6.6, the image of each pixel is 50 μm X 50 μm, and the cover...

Embodiment 3

[0105] This embodiment provides a coating scraper 4, which can evenly coat the resin on the film or coat the resin on the object to be printed. The coating scraper of this embodiment is as follows: figure 2 As shown, it consists of a tube with openings to allow resin to be extruded along the span of the membrane or build platform. When the release film 3 or the printing platform 2 is pulled through the coating blade 4, the openings ensure that the resin is evenly coated. In a specific embodiment, the openings are coated in an array of holes 45, half of the holes form an angle of 65° with the tube plane, and the other half are perpendicular to the tube plane, and they are arranged alternately.

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Abstract

The invention relates to membrane coating multi-material photocuring 3D printing equipment and a use method thereof. Membrane-coating stereolithography (MCSL) is used for rapid 3D multi-material micro-manufacturing. The new technology utilizes elastic and oxygen permeation polymer membranes such as PFA membranes or PDMS, free and open surfaces in traditional P[mu]SL are eliminated, thus the manufacturing speed is greatly increased, a method capable of quickly switching materials in the printing process is provided, and that is, an advanced coating scraper is adopted. By utilizing specialized fluid control, any complex multi-material structure can also be achieved even free particles are encapsulated. Convenience is provided for preparation of multi-material, high-precision and large-formatsample pieces in a 3D printing mode. The advantage combination provides a powerful and promising tool for emerging research fields such as material science, cell biology and tissue engineering.

Description

technical field [0001] The present application belongs to the technical field of 3D printing, and in particular relates to a film-coated multi-material photocuring 3D printing device and a method for using the same. Background technique [0002] US Patent US 4575330 shows a system that cures liquid photosensitive resin materials by ultraviolet light to form solid layers in sequence. Each layer is a cross-section of the corresponding position of the 3D model, and is cured layer by layer until a three-dimensional object is formed. This process This system is also known as stereolithography. [0003] Stereolithography was originally conceived as a rapid prototyping technique. Rapid prototyping involves a range of techniques, often with the help of CAD, in the fastest way to create a life-size model of a product part. Since its development, stereolithography has greatly helped engineers visualize complex 3D part geometries, detect errors in prototype schematics, test key compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/129B29C64/20B33Y10/00B33Y30/00
CPCB29C64/129B29C64/20B33Y10/00B33Y30/00
Inventor 夏春光付良康彭冲贺晓宁
Owner BMF NANO MATERIAL TECHNOLOGY CO LTD
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